diff --git a/.gitignore b/.gitignore index 54b77b4ef..c8c423006 100644 --- a/.gitignore +++ b/.gitignore @@ -38,6 +38,9 @@ *.x86_64 *.hex +# Deko3d shaders +*.dksh + # Switch Executables *.nso *.nro diff --git a/troposphere/Makefile b/troposphere/Makefile index 2be61ea0a..25adf0da2 100644 --- a/troposphere/Makefile +++ b/troposphere/Makefile @@ -1,4 +1,4 @@ -APPLICATIONS := reboot_to_payload +APPLICATIONS := daybreak reboot_to_payload SUBFOLDERS := $(APPLICATIONS) diff --git a/troposphere/daybreak/Makefile b/troposphere/daybreak/Makefile new file mode 100644 index 000000000..8753aca8f --- /dev/null +++ b/troposphere/daybreak/Makefile @@ -0,0 +1,282 @@ +#--------------------------------------------------------------------------------- +.SUFFIXES: +#--------------------------------------------------------------------------------- + +ifeq ($(strip $(DEVKITPRO)),) +$(error "Please set DEVKITPRO in your environment. export DEVKITPRO=/devkitpro") +endif + +TOPDIR ?= $(CURDIR) +include $(DEVKITPRO)/libnx/switch_rules + +#--------------------------------------------------------------------------------- +# TARGET is the name of the output +# BUILD is the directory where object files & intermediate files will be placed +# SOURCES is a list of directories containing source code +# DATA is a list of directories containing data files +# INCLUDES is a list of directories containing header files +# ROMFS is the directory containing data to be added to RomFS, relative to the Makefile (Optional) +# +# NO_ICON: if set to anything, do not use icon. +# NO_NACP: if set to anything, no .nacp file is generated. +# APP_TITLE is the name of the app stored in the .nacp file (Optional) +# APP_AUTHOR is the author of the app stored in the .nacp file (Optional) +# APP_VERSION is the version of the app stored in the .nacp file (Optional) +# APP_TITLEID is the titleID of the app stored in the .nacp file (Optional) +# ICON is the filename of the icon (.jpg), relative to the project folder. +# If not set, it attempts to use one of the following (in this order): +# - .jpg +# - icon.jpg +# - /default_icon.jpg +# +# CONFIG_JSON is the filename of the NPDM config file (.json), relative to the project folder. +# If not set, it attempts to use one of the following (in this order): +# - .json +# - config.json +# If a JSON file is provided or autodetected, an ExeFS PFS0 (.nsp) is built instead +# of a homebrew executable (.nro). This is intended to be used for sysmodules. +# NACP building is skipped as well. +#--------------------------------------------------------------------------------- +TARGET := daybreak +BUILD := build +SOURCES := source nanovg/shaders +DATA := data +INCLUDES := include ../include +ROMFS := romfs + +# Output folders for autogenerated files in romfs +OUT_SHADERS := shaders + +APP_TITLE := Daybreak +APP_AUTHOR := Atmosphere-NX +APP_VERSION := 1.0.0 + +#--------------------------------------------------------------------------------- +# options for code generation +#--------------------------------------------------------------------------------- +ARCH := -march=armv8-a+crc+crypto -mtune=cortex-a57 -mtp=soft -fPIE + +CFLAGS := -g -Wall -O2 -ffunction-sections \ + $(ARCH) $(DEFINES) + +CFLAGS += $(INCLUDE) -D__SWITCH__ + +CXXFLAGS := $(CFLAGS) -std=gnu++17 -fno-exceptions -fno-rtti + +ASFLAGS := -g $(ARCH) +LDFLAGS = -specs=$(DEVKITPRO)/libnx/switch.specs -g $(ARCH) -Wl,-Map,$(notdir $*.map) + +LIBS := -lnanovg -ldeko3d -lnx + +#--------------------------------------------------------------------------------- +# list of directories containing libraries, this must be the top level containing +# include and lib +#--------------------------------------------------------------------------------- +LIBDIRS := $(PORTLIBS) $(LIBNX) $(CURDIR)/nanovg/ + +#--------------------------------------------------------------------------------- +# no real need to edit anything past this point unless you need to add additional +# rules for different file extensions +#--------------------------------------------------------------------------------- +ifneq ($(BUILD),$(notdir $(CURDIR))) +#--------------------------------------------------------------------------------- + +export OUTPUT := $(CURDIR)/$(TARGET) +export TOPDIR := $(CURDIR) + +export VPATH := $(foreach dir,$(SOURCES),$(CURDIR)/$(dir)) \ + $(foreach dir,$(DATA),$(CURDIR)/$(dir)) + +export DEPSDIR := $(CURDIR)/$(BUILD) + +SUBFOLDERS := nanovg + +TOPTARGETS := all clean + +$(TOPTARGETS): $(SUBFOLDERS) + +$(SUBFOLDERS): + $(MAKE) -C $@ $(MAKECMDGOALS) + +CFILES := $(foreach dir,$(SOURCES),$(notdir $(wildcard $(dir)/*.c))) +CPPFILES := $(foreach dir,$(SOURCES),$(notdir $(wildcard $(dir)/*.cpp))) +SFILES := $(foreach dir,$(SOURCES),$(notdir $(wildcard $(dir)/*.s))) +GLSLFILES := $(foreach dir,$(SOURCES),$(notdir $(wildcard $(dir)/*.glsl))) +BINFILES := $(foreach dir,$(DATA),$(notdir $(wildcard $(dir)/*.*))) + +#--------------------------------------------------------------------------------- +# use CXX for linking C++ projects, CC for standard C +#--------------------------------------------------------------------------------- +ifeq ($(strip $(CPPFILES)),) +#--------------------------------------------------------------------------------- + export LD := $(CC) +#--------------------------------------------------------------------------------- +else +#--------------------------------------------------------------------------------- + export LD := $(CXX) +#--------------------------------------------------------------------------------- +endif +#--------------------------------------------------------------------------------- + +export OFILES_BIN := $(addsuffix .o,$(BINFILES)) +export OFILES_SRC := $(CPPFILES:.cpp=.o) $(CFILES:.c=.o) $(SFILES:.s=.o) +export OFILES := $(OFILES_BIN) $(OFILES_SRC) +export HFILES_BIN := $(addsuffix .h,$(subst .,_,$(BINFILES))) +export LIBPATHS := $(foreach dir,$(LIBDIRS),-L$(dir)/lib) + +ifneq ($(strip $(ROMFS)),) + ROMFS_TARGETS := + ROMFS_FOLDERS := + ifneq ($(strip $(OUT_SHADERS)),) + ROMFS_SHADERS := $(ROMFS)/$(OUT_SHADERS) + ROMFS_TARGETS += $(patsubst %.glsl, $(ROMFS_SHADERS)/%.dksh, $(GLSLFILES)) + ROMFS_FOLDERS += $(ROMFS_SHADERS) + endif + + export ROMFS_DEPS := $(foreach file,$(ROMFS_TARGETS),$(CURDIR)/$(file)) +endif + +export INCLUDE := $(foreach dir,$(INCLUDES),-I$(CURDIR)/$(dir)) \ + $(foreach dir,$(LIBDIRS),-I$(dir)/include) \ + -I$(CURDIR)/$(BUILD) + +ifeq ($(strip $(CONFIG_JSON)),) + jsons := $(wildcard *.json) + ifneq (,$(findstring $(TARGET).json,$(jsons))) + export APP_JSON := $(TOPDIR)/$(TARGET).json + else + ifneq (,$(findstring config.json,$(jsons))) + export APP_JSON := $(TOPDIR)/config.json + endif + endif +else + export APP_JSON := $(TOPDIR)/$(CONFIG_JSON) +endif + +ifeq ($(strip $(ICON)),) + icons := $(wildcard *.jpg) + ifneq (,$(findstring $(TARGET).jpg,$(icons))) + export APP_ICON := $(TOPDIR)/$(TARGET).jpg + else + ifneq (,$(findstring icon.jpg,$(icons))) + export APP_ICON := $(TOPDIR)/icon.jpg + endif + endif +else + export APP_ICON := $(TOPDIR)/$(ICON) +endif + +ifeq ($(strip $(NO_ICON)),) + export NROFLAGS += --icon=$(APP_ICON) +endif + +ifeq ($(strip $(NO_NACP)),) + export NROFLAGS += --nacp=$(CURDIR)/$(TARGET).nacp +endif + +ifneq ($(APP_TITLEID),) + export NACPFLAGS += --titleid=$(APP_TITLEID) +endif + +ifneq ($(ROMFS),) + export NROFLAGS += --romfsdir=$(CURDIR)/$(ROMFS) +endif + +.PHONY: $(TOPTARGETS) $(SUBFOLDERS) all clean + +#--------------------------------------------------------------------------------- +all: $(ROMFS_TARGETS) | $(BUILD) + @$(MAKE) --no-print-directory -C $(BUILD) -f $(CURDIR)/Makefile + +$(BUILD): + @mkdir -p $@ + +ifneq ($(strip $(ROMFS_TARGETS)),) + +$(ROMFS_TARGETS): | $(ROMFS_FOLDERS) + +$(ROMFS_FOLDERS): + @mkdir -p $@ + +$(ROMFS_SHADERS)/%_vsh.dksh: %_vsh.glsl + @echo {vert} $(notdir $<) + @uam -s vert -o $@ $< + +$(ROMFS_SHADERS)/%_tcsh.dksh: %_tcsh.glsl + @echo {tess_ctrl} $(notdir $<) + @uam -s tess_ctrl -o $@ $< + +$(ROMFS_SHADERS)/%_tesh.dksh: %_tesh.glsl + @echo {tess_eval} $(notdir $<) + @uam -s tess_eval -o $@ $< + +$(ROMFS_SHADERS)/%_gsh.dksh: %_gsh.glsl + @echo {geom} $(notdir $<) + @uam -s geom -o $@ $< + +$(ROMFS_SHADERS)/%_fsh.dksh: %_fsh.glsl + @echo {frag} $(notdir $<) + @uam -s frag -o $@ $< + +$(ROMFS_SHADERS)/%.dksh: %.glsl + @echo {comp} $(notdir $<) + @uam -s comp -o $@ $< + +endif + +#--------------------------------------------------------------------------------- +clean: + @echo clean ... +ifeq ($(strip $(APP_JSON)),) + @rm -fr $(BUILD) $(ROMFS_FOLDERS) $(TARGET).nro $(TARGET).nacp $(TARGET).elf +else + @rm -fr $(BUILD) $(ROMFS_FOLDERS) $(TARGET).nsp $(TARGET).nso $(TARGET).npdm $(TARGET).elf +endif + + +#--------------------------------------------------------------------------------- +else +.PHONY: all + +DEPENDS := $(OFILES:.o=.d) + +#--------------------------------------------------------------------------------- +# main targets +#--------------------------------------------------------------------------------- +ifeq ($(strip $(APP_JSON)),) + +all : $(OUTPUT).nro + +ifeq ($(strip $(NO_NACP)),) +$(OUTPUT).nro : $(OUTPUT).elf $(OUTPUT).nacp $(ROMFS_DEPS) +else +$(OUTPUT).nro : $(OUTPUT).elf $(ROMFS_DEPS) +endif + +else + +all : $(OUTPUT).nsp + +$(OUTPUT).nsp : $(OUTPUT).nso $(OUTPUT).npdm + +$(OUTPUT).nso : $(OUTPUT).elf + +endif + +$(OUTPUT).elf : $(OFILES) + +$(OFILES_SRC) : $(HFILES_BIN) + +#--------------------------------------------------------------------------------- +# you need a rule like this for each extension you use as binary data +#--------------------------------------------------------------------------------- +%.bin.o %_bin.h : %.bin +#--------------------------------------------------------------------------------- + @echo $(notdir $<) + @$(bin2o) + +-include $(DEPENDS) + +#--------------------------------------------------------------------------------------- +endif +#--------------------------------------------------------------------------------------- \ No newline at end of file diff --git a/troposphere/daybreak/icon.jpg b/troposphere/daybreak/icon.jpg new file mode 100644 index 000000000..867e5d53b Binary files /dev/null and b/troposphere/daybreak/icon.jpg differ diff --git a/troposphere/daybreak/nanovg/.gitignore b/troposphere/daybreak/nanovg/.gitignore new file mode 100644 index 000000000..50b6c6179 --- /dev/null +++ b/troposphere/daybreak/nanovg/.gitignore @@ -0,0 +1,93 @@ +# deko3d shaders +*.dksh + +# Prerequisites +*.d + +# Object files +*.o +*.ko +*.obj +*.elf + +# Linker output +*.ilk +*.map +*.exp +*.lst + +# Precompiled Headers +*.gch +*.pch + +# Libraries +*.lib +*.a +*.la +*.lo + +# Shared objects (inc. Windows DLLs) +*.dll +*.so +*.so.* +*.dylib + +# Executables +*.exe +*.lz4 +*.out +*.app +*.i*86 +*.x86_64 +*.hex + +# Switch Executables +*.nso +*.nro +*.nacp +*.npdm +*.pfs0 +*.nsp +*.kip + +# Debug files +*.dSYM/ +*.su +*.idb +*.pdb + +# Kernel Module Compile Results +*.mod* +*.cmd +.tmp_versions/ +modules.order +Module.symvers +Mkfile.old +dkms.conf + +# Distribution files +*.tgz +*.zip +*.bz2 + +# IDA binaries +*.id0 +*.id1 +*.id2 +*.idb +*.i64 +*.nam +*.til + +# KEYS file for sept-secondary. +*.pyc +sept/sept-secondary/KEYS.py + +.**/ + +# NOTE: make sure to make exceptions to this pattern when needed! +*.bin +*.enc + +**/out +**/build diff --git a/troposphere/daybreak/nanovg/.gitrepo b/troposphere/daybreak/nanovg/.gitrepo new file mode 100644 index 000000000..af3cd2185 --- /dev/null +++ b/troposphere/daybreak/nanovg/.gitrepo @@ -0,0 +1,12 @@ +; DO NOT EDIT (unless you know what you are doing) +; +; This subdirectory is a git "subrepo", and this file is maintained by the +; git-subrepo command. See https://github.com/git-commands/git-subrepo#readme +; +[subrepo] + remote = https://github.com/Adubbz/nanovg-deko.git + branch = master + commit = c197ba2f0d1fe2c70e2d49c61f16b4063aef569e + parent = 171d97e0ac2eaf1bca1c48727404fec45621f1fd + method = merge + cmdver = 0.4.1 diff --git a/troposphere/daybreak/nanovg/LICENSE b/troposphere/daybreak/nanovg/LICENSE new file mode 100644 index 000000000..53562c099 --- /dev/null +++ b/troposphere/daybreak/nanovg/LICENSE @@ -0,0 +1,18 @@ +Copyright (c) 2020 Adubbz, Mikko Mononen memon@inside.org + +This software is provided 'as-is', without any express or implied +warranty. In no event will the authors be held liable for any +damages arising from the use of this software. + +Permission is granted to anyone to use this software for any +purpose, including commercial applications, and to alter it and +redistribute it freely, subject to the following restrictions: + +1. The origin of this software must not be misrepresented; you + must not claim that you wrote the original software. If you use + this software in a product, an acknowledgment in the product + documentation would be appreciated but is not required. +2. Altered source versions must be plainly marked as such, and + must not be misrepresented as being the original software. +3. This notice may not be removed or altered from any source + distribution. diff --git a/troposphere/daybreak/nanovg/Makefile b/troposphere/daybreak/nanovg/Makefile new file mode 100644 index 000000000..48826c26f --- /dev/null +++ b/troposphere/daybreak/nanovg/Makefile @@ -0,0 +1,168 @@ +#--------------------------------------------------------------------------------- +.SUFFIXES: +#--------------------------------------------------------------------------------- + +ifeq ($(strip $(DEVKITPRO)),) +$(error "Please set DEVKITPRO in your environment. export DEVKITPRO=/devkitpro") +endif + +TOPDIR ?= $(CURDIR) +include $(DEVKITPRO)/libnx/switch_rules + +#--------------------------------------------------------------------------------- +# TARGET is the name of the output +# BUILD is the directory where object files & intermediate files will be placed +# SOURCES is a list of directories containing source code +# DATA is a list of directories containing data files +# INCLUDES is a list of directories containing header files +# ROMFS is the directory containing data to be added to RomFS, relative to the Makefile (Optional) +# +# NO_ICON: if set to anything, do not use icon. +# NO_NACP: if set to anything, no .nacp file is generated. +# APP_TITLE is the name of the app stored in the .nacp file (Optional) +# APP_AUTHOR is the author of the app stored in the .nacp file (Optional) +# APP_VERSION is the version of the app stored in the .nacp file (Optional) +# APP_TITLEID is the titleID of the app stored in the .nacp file (Optional) +# ICON is the filename of the icon (.jpg), relative to the project folder. +# If not set, it attempts to use one of the following (in this order): +# - .jpg +# - icon.jpg +# - /default_icon.jpg +# +# CONFIG_JSON is the filename of the NPDM config file (.json), relative to the project folder. +# If not set, it attempts to use one of the following (in this order): +# - .json +# - config.json +# If a JSON file is provided or autodetected, an ExeFS PFS0 (.nsp) is built instead +# of a homebrew executable (.nro). This is intended to be used for sysmodules. +# NACP building is skipped as well. +#--------------------------------------------------------------------------------- +TARGET := libnanovg +BUILD := build +SOURCES := source source/framework +INCLUDES := include include/nanovg include/nanovg/framework + +#--------------------------------------------------------------------------------- +# options for code generation +#--------------------------------------------------------------------------------- +ARCH := -march=armv8-a+crc+crypto -mtune=cortex-a57 -mtp=soft -fPIE + +CFLAGS := -g -Wall -O2 -ffunction-sections \ + $(ARCH) $(DEFINES) + +CFLAGS += $(INCLUDE) -D__SWITCH__ + +CXXFLAGS := $(CFLAGS) -std=gnu++17 -fno-exceptions -fno-rtti + +ASFLAGS := -g $(ARCH) +LDFLAGS = -specs=$(DEVKITPRO)/libnx/switch.specs -g $(ARCH) -Wl,-Map,$(notdir $*.map) + +#LIBS := -ldeko3dd -lglad -lEGL -lglapi -ldrm_nouveau +LIBS := -ldeko3d + +#--------------------------------------------------------------------------------- +# list of directories containing libraries, this must be the top level containing +# include and lib +#--------------------------------------------------------------------------------- +LIBDIRS := $(PORTLIBS) $(LIBNX) + +#--------------------------------------------------------------------------------- +# no real need to edit anything past this point unless you need to add additional +# rules for different file extensions +#--------------------------------------------------------------------------------- +ifneq ($(BUILD),$(notdir $(CURDIR))) +#--------------------------------------------------------------------------------- + +export OUTPUT := $(CURDIR)/$(TARGET) +export TOPDIR := $(CURDIR) + +export VPATH := $(foreach dir,$(SOURCES),$(CURDIR)/$(dir)) \ + $(foreach dir,$(DATA),$(CURDIR)/$(dir)) + +export DEPSDIR := $(CURDIR)/$(BUILD) + +CFILES := $(foreach dir,$(SOURCES),$(notdir $(wildcard $(dir)/*.c))) +CPPFILES := $(foreach dir,$(SOURCES),$(notdir $(wildcard $(dir)/*.cpp))) +SFILES := $(foreach dir,$(SOURCES),$(notdir $(wildcard $(dir)/*.s))) +GLSLFILES := $(foreach dir,$(SOURCES),$(notdir $(wildcard $(dir)/*.glsl))) +BINFILES := $(foreach dir,$(DATA),$(notdir $(wildcard $(dir)/*.*))) + +#--------------------------------------------------------------------------------- +# use CXX for linking C++ projects, CC for standard C +#--------------------------------------------------------------------------------- +ifeq ($(strip $(CPPFILES)),) +#--------------------------------------------------------------------------------- + export LD := $(CC) +#--------------------------------------------------------------------------------- +else +#--------------------------------------------------------------------------------- + export LD := $(CXX) +#--------------------------------------------------------------------------------- +endif +#--------------------------------------------------------------------------------- + +export OFILES_BIN := $(addsuffix .o,$(BINFILES)) +export OFILES_SRC := $(CPPFILES:.cpp=.o) $(CFILES:.c=.o) $(SFILES:.s=.o) +export OFILES := $(OFILES_BIN) $(OFILES_SRC) +export HFILES_BIN := $(addsuffix .h,$(subst .,_,$(BINFILES))) + +export INCLUDE := $(foreach dir,$(INCLUDES),-I$(CURDIR)/$(dir)) \ + $(foreach dir,$(LIBDIRS),-I$(dir)/include) \ + -I$(CURDIR)/$(BUILD) + +.PHONY: all clean + +#--------------------------------------------------------------------------------- +all: lib/$(TARGET).a + +lib: + @[ -d $@ ] || mkdir -p $@ + +release: + @[ -d $@ ] || mkdir -p $@ + +lib/$(TARGET).a : lib release $(SOURCES) $(INCLUDES) + @$(MAKE) BUILD=release OUTPUT=$(CURDIR)/$@ \ + BUILD_CFLAGS="-DNDEBUG=1 -O2" \ + DEPSDIR=$(CURDIR)/release \ + --no-print-directory -C release \ + -f $(CURDIR)/Makefile + +dist-bin: all + @tar --exclude=*~ -cjf $(TARGET).tar.bz2 include lib + +dist-src: + @tar --exclude=*~ -cjf $(TARGET)-src.tar.bz2 include source Makefile + +dist: dist-src dist-bin +#--------------------------------------------------------------------------------- +clean: + @echo clean ... + @rm -fr release lib *.bz2 +#--------------------------------------------------------------------------------- +else + +DEPENDS := $(OFILES:.o=.d) + +#--------------------------------------------------------------------------------- +# main targets +#--------------------------------------------------------------------------------- +$(OUTPUT) : $(OFILES) + +$(OFILES) : $(GCH_FILES) + +$(OFILES_SRC) : $(HFILES_BIN) + +#--------------------------------------------------------------------------------- +# you need a rule like this for each extension you use as binary data +#--------------------------------------------------------------------------------- +%.bin.o %_bin.h : %.bin +#--------------------------------------------------------------------------------- + @echo $(notdir $<) + @$(bin2o) + +-include $(DEPENDS) + +#--------------------------------------------------------------------------------------- +endif +#--------------------------------------------------------------------------------------- \ No newline at end of file diff --git a/troposphere/daybreak/nanovg/README.md b/troposphere/daybreak/nanovg/README.md new file mode 100644 index 000000000..96943b459 --- /dev/null +++ b/troposphere/daybreak/nanovg/README.md @@ -0,0 +1,18 @@ +NanoVG for Deko3D +========== + +NanoVG is small antialiased vector graphics rendering library. This is a port to [deko3d](https://github.com/devkitPro/deko3d), a low level 3D graphics API targetting the Nvidia Tegra X1 found inside the Nintendo Switch. + +## Example +An example of using this library can be found [here](https://github.com/Adubbz/nanovg-deko3d-example). + +## License +The library is licensed under [zlib license](LICENSE). + +Dependencies: +- fincs' deko3d framework is licensed under [zlib license](source/framework/LICENSE). + +## Links +The original [nanovg project](https://github.com/memononen/nanovg). +Uses [stb_truetype](http://nothings.org) for font rendering. +Uses [stb_image](http://nothings.org) for image loading. diff --git a/troposphere/daybreak/nanovg/include/nanovg.h b/troposphere/daybreak/nanovg/include/nanovg.h new file mode 100644 index 000000000..646b42424 --- /dev/null +++ b/troposphere/daybreak/nanovg/include/nanovg.h @@ -0,0 +1,697 @@ +// +// Copyright (c) 2013 Mikko Mononen memon@inside.org +// +// This software is provided 'as-is', without any express or implied +// warranty. In no event will the authors be held liable for any damages +// arising from the use of this software. +// Permission is granted to anyone to use this software for any purpose, +// including commercial applications, and to alter it and redistribute it +// freely, subject to the following restrictions: +// 1. The origin of this software must not be misrepresented; you must not +// claim that you wrote the original software. If you use this software +// in a product, an acknowledgment in the product documentation would be +// appreciated but is not required. +// 2. Altered source versions must be plainly marked as such, and must not be +// misrepresented as being the original software. +// 3. This notice may not be removed or altered from any source distribution. +// + +#ifndef NANOVG_H +#define NANOVG_H + +#ifdef __cplusplus +extern "C" { +#endif + +#define NVG_PI 3.14159265358979323846264338327f + +#ifdef _MSC_VER +#pragma warning(push) +#pragma warning(disable: 4201) // nonstandard extension used : nameless struct/union +#endif + +typedef struct NVGcontext NVGcontext; + +struct NVGcolor { + union { + float rgba[4]; + struct { + float r,g,b,a; + }; + }; +}; +typedef struct NVGcolor NVGcolor; + +struct NVGpaint { + float xform[6]; + float extent[2]; + float radius; + float feather; + NVGcolor innerColor; + NVGcolor outerColor; + int image; +}; +typedef struct NVGpaint NVGpaint; + +enum NVGwinding { + NVG_CCW = 1, // Winding for solid shapes + NVG_CW = 2, // Winding for holes +}; + +enum NVGsolidity { + NVG_SOLID = 1, // CCW + NVG_HOLE = 2, // CW +}; + +enum NVGlineCap { + NVG_BUTT, + NVG_ROUND, + NVG_SQUARE, + NVG_BEVEL, + NVG_MITER, +}; + +enum NVGalign { + // Horizontal align + NVG_ALIGN_LEFT = 1<<0, // Default, align text horizontally to left. + NVG_ALIGN_CENTER = 1<<1, // Align text horizontally to center. + NVG_ALIGN_RIGHT = 1<<2, // Align text horizontally to right. + // Vertical align + NVG_ALIGN_TOP = 1<<3, // Align text vertically to top. + NVG_ALIGN_MIDDLE = 1<<4, // Align text vertically to middle. + NVG_ALIGN_BOTTOM = 1<<5, // Align text vertically to bottom. + NVG_ALIGN_BASELINE = 1<<6, // Default, align text vertically to baseline. +}; + +enum NVGblendFactor { + NVG_ZERO = 1<<0, + NVG_ONE = 1<<1, + NVG_SRC_COLOR = 1<<2, + NVG_ONE_MINUS_SRC_COLOR = 1<<3, + NVG_DST_COLOR = 1<<4, + NVG_ONE_MINUS_DST_COLOR = 1<<5, + NVG_SRC_ALPHA = 1<<6, + NVG_ONE_MINUS_SRC_ALPHA = 1<<7, + NVG_DST_ALPHA = 1<<8, + NVG_ONE_MINUS_DST_ALPHA = 1<<9, + NVG_SRC_ALPHA_SATURATE = 1<<10, +}; + +enum NVGcompositeOperation { + NVG_SOURCE_OVER, + NVG_SOURCE_IN, + NVG_SOURCE_OUT, + NVG_ATOP, + NVG_DESTINATION_OVER, + NVG_DESTINATION_IN, + NVG_DESTINATION_OUT, + NVG_DESTINATION_ATOP, + NVG_LIGHTER, + NVG_COPY, + NVG_XOR, +}; + +struct NVGcompositeOperationState { + int srcRGB; + int dstRGB; + int srcAlpha; + int dstAlpha; +}; +typedef struct NVGcompositeOperationState NVGcompositeOperationState; + +struct NVGglyphPosition { + const char* str; // Position of the glyph in the input string. + float x; // The x-coordinate of the logical glyph position. + float minx, maxx; // The bounds of the glyph shape. +}; +typedef struct NVGglyphPosition NVGglyphPosition; + +struct NVGtextRow { + const char* start; // Pointer to the input text where the row starts. + const char* end; // Pointer to the input text where the row ends (one past the last character). + const char* next; // Pointer to the beginning of the next row. + float width; // Logical width of the row. + float minx, maxx; // Actual bounds of the row. Logical with and bounds can differ because of kerning and some parts over extending. +}; +typedef struct NVGtextRow NVGtextRow; + +enum NVGimageFlags { + NVG_IMAGE_GENERATE_MIPMAPS = 1<<0, // Generate mipmaps during creation of the image. + NVG_IMAGE_REPEATX = 1<<1, // Repeat image in X direction. + NVG_IMAGE_REPEATY = 1<<2, // Repeat image in Y direction. + NVG_IMAGE_FLIPY = 1<<3, // Flips (inverses) image in Y direction when rendered. + NVG_IMAGE_PREMULTIPLIED = 1<<4, // Image data has premultiplied alpha. + NVG_IMAGE_NEAREST = 1<<5, // Image interpolation is Nearest instead Linear +}; + +// Begin drawing a new frame +// Calls to nanovg drawing API should be wrapped in nvgBeginFrame() & nvgEndFrame() +// nvgBeginFrame() defines the size of the window to render to in relation currently +// set viewport (i.e. glViewport on GL backends). Device pixel ration allows to +// control the rendering on Hi-DPI devices. +// For example, GLFW returns two dimension for an opened window: window size and +// frame buffer size. In that case you would set windowWidth/Height to the window size +// devicePixelRatio to: frameBufferWidth / windowWidth. +void nvgBeginFrame(NVGcontext* ctx, float windowWidth, float windowHeight, float devicePixelRatio); + +// Cancels drawing the current frame. +void nvgCancelFrame(NVGcontext* ctx); + +// Ends drawing flushing remaining render state. +void nvgEndFrame(NVGcontext* ctx); + +// +// Composite operation +// +// The composite operations in NanoVG are modeled after HTML Canvas API, and +// the blend func is based on OpenGL (see corresponding manuals for more info). +// The colors in the blending state have premultiplied alpha. + +// Sets the composite operation. The op parameter should be one of NVGcompositeOperation. +void nvgGlobalCompositeOperation(NVGcontext* ctx, int op); + +// Sets the composite operation with custom pixel arithmetic. The parameters should be one of NVGblendFactor. +void nvgGlobalCompositeBlendFunc(NVGcontext* ctx, int sfactor, int dfactor); + +// Sets the composite operation with custom pixel arithmetic for RGB and alpha components separately. The parameters should be one of NVGblendFactor. +void nvgGlobalCompositeBlendFuncSeparate(NVGcontext* ctx, int srcRGB, int dstRGB, int srcAlpha, int dstAlpha); + +// +// Color utils +// +// Colors in NanoVG are stored as unsigned ints in ABGR format. + +// Returns a color value from red, green, blue values. Alpha will be set to 255 (1.0f). +NVGcolor nvgRGB(unsigned char r, unsigned char g, unsigned char b); + +// Returns a color value from red, green, blue values. Alpha will be set to 1.0f. +NVGcolor nvgRGBf(float r, float g, float b); + + +// Returns a color value from red, green, blue and alpha values. +NVGcolor nvgRGBA(unsigned char r, unsigned char g, unsigned char b, unsigned char a); + +// Returns a color value from red, green, blue and alpha values. +NVGcolor nvgRGBAf(float r, float g, float b, float a); + + +// Linearly interpolates from color c0 to c1, and returns resulting color value. +NVGcolor nvgLerpRGBA(NVGcolor c0, NVGcolor c1, float u); + +// Sets transparency of a color value. +NVGcolor nvgTransRGBA(NVGcolor c0, unsigned char a); + +// Sets transparency of a color value. +NVGcolor nvgTransRGBAf(NVGcolor c0, float a); + +// Returns color value specified by hue, saturation and lightness. +// HSL values are all in range [0..1], alpha will be set to 255. +NVGcolor nvgHSL(float h, float s, float l); + +// Returns color value specified by hue, saturation and lightness and alpha. +// HSL values are all in range [0..1], alpha in range [0..255] +NVGcolor nvgHSLA(float h, float s, float l, unsigned char a); + +// +// State Handling +// +// NanoVG contains state which represents how paths will be rendered. +// The state contains transform, fill and stroke styles, text and font styles, +// and scissor clipping. + +// Pushes and saves the current render state into a state stack. +// A matching nvgRestore() must be used to restore the state. +void nvgSave(NVGcontext* ctx); + +// Pops and restores current render state. +void nvgRestore(NVGcontext* ctx); + +// Resets current render state to default values. Does not affect the render state stack. +void nvgReset(NVGcontext* ctx); + +// +// Render styles +// +// Fill and stroke render style can be either a solid color or a paint which is a gradient or a pattern. +// Solid color is simply defined as a color value, different kinds of paints can be created +// using nvgLinearGradient(), nvgBoxGradient(), nvgRadialGradient() and nvgImagePattern(). +// +// Current render style can be saved and restored using nvgSave() and nvgRestore(). + +// Sets whether to draw antialias for nvgStroke() and nvgFill(). It's enabled by default. +void nvgShapeAntiAlias(NVGcontext* ctx, int enabled); + +// Sets current stroke style to a solid color. +void nvgStrokeColor(NVGcontext* ctx, NVGcolor color); + +// Sets current stroke style to a paint, which can be a one of the gradients or a pattern. +void nvgStrokePaint(NVGcontext* ctx, NVGpaint paint); + +// Sets current fill style to a solid color. +void nvgFillColor(NVGcontext* ctx, NVGcolor color); + +// Sets current fill style to a paint, which can be a one of the gradients or a pattern. +void nvgFillPaint(NVGcontext* ctx, NVGpaint paint); + +// Sets the miter limit of the stroke style. +// Miter limit controls when a sharp corner is beveled. +void nvgMiterLimit(NVGcontext* ctx, float limit); + +// Sets the stroke width of the stroke style. +void nvgStrokeWidth(NVGcontext* ctx, float size); + +// Sets how the end of the line (cap) is drawn, +// Can be one of: NVG_BUTT (default), NVG_ROUND, NVG_SQUARE. +void nvgLineCap(NVGcontext* ctx, int cap); + +// Sets how sharp path corners are drawn. +// Can be one of NVG_MITER (default), NVG_ROUND, NVG_BEVEL. +void nvgLineJoin(NVGcontext* ctx, int join); + +// Sets the transparency applied to all rendered shapes. +// Already transparent paths will get proportionally more transparent as well. +void nvgGlobalAlpha(NVGcontext* ctx, float alpha); + +// +// Transforms +// +// The paths, gradients, patterns and scissor region are transformed by an transformation +// matrix at the time when they are passed to the API. +// The current transformation matrix is a affine matrix: +// [sx kx tx] +// [ky sy ty] +// [ 0 0 1] +// Where: sx,sy define scaling, kx,ky skewing, and tx,ty translation. +// The last row is assumed to be 0,0,1 and is not stored. +// +// Apart from nvgResetTransform(), each transformation function first creates +// specific transformation matrix and pre-multiplies the current transformation by it. +// +// Current coordinate system (transformation) can be saved and restored using nvgSave() and nvgRestore(). + +// Resets current transform to a identity matrix. +void nvgResetTransform(NVGcontext* ctx); + +// Premultiplies current coordinate system by specified matrix. +// The parameters are interpreted as matrix as follows: +// [a c e] +// [b d f] +// [0 0 1] +void nvgTransform(NVGcontext* ctx, float a, float b, float c, float d, float e, float f); + +// Translates current coordinate system. +void nvgTranslate(NVGcontext* ctx, float x, float y); + +// Rotates current coordinate system. Angle is specified in radians. +void nvgRotate(NVGcontext* ctx, float angle); + +// Skews the current coordinate system along X axis. Angle is specified in radians. +void nvgSkewX(NVGcontext* ctx, float angle); + +// Skews the current coordinate system along Y axis. Angle is specified in radians. +void nvgSkewY(NVGcontext* ctx, float angle); + +// Scales the current coordinate system. +void nvgScale(NVGcontext* ctx, float x, float y); + +// Stores the top part (a-f) of the current transformation matrix in to the specified buffer. +// [a c e] +// [b d f] +// [0 0 1] +// There should be space for 6 floats in the return buffer for the values a-f. +void nvgCurrentTransform(NVGcontext* ctx, float* xform); + + +// The following functions can be used to make calculations on 2x3 transformation matrices. +// A 2x3 matrix is represented as float[6]. + +// Sets the transform to identity matrix. +void nvgTransformIdentity(float* dst); + +// Sets the transform to translation matrix matrix. +void nvgTransformTranslate(float* dst, float tx, float ty); + +// Sets the transform to scale matrix. +void nvgTransformScale(float* dst, float sx, float sy); + +// Sets the transform to rotate matrix. Angle is specified in radians. +void nvgTransformRotate(float* dst, float a); + +// Sets the transform to skew-x matrix. Angle is specified in radians. +void nvgTransformSkewX(float* dst, float a); + +// Sets the transform to skew-y matrix. Angle is specified in radians. +void nvgTransformSkewY(float* dst, float a); + +// Sets the transform to the result of multiplication of two transforms, of A = A*B. +void nvgTransformMultiply(float* dst, const float* src); + +// Sets the transform to the result of multiplication of two transforms, of A = B*A. +void nvgTransformPremultiply(float* dst, const float* src); + +// Sets the destination to inverse of specified transform. +// Returns 1 if the inverse could be calculated, else 0. +int nvgTransformInverse(float* dst, const float* src); + +// Transform a point by given transform. +void nvgTransformPoint(float* dstx, float* dsty, const float* xform, float srcx, float srcy); + +// Converts degrees to radians and vice versa. +float nvgDegToRad(float deg); +float nvgRadToDeg(float rad); + +// +// Images +// +// NanoVG allows you to load jpg, png, psd, tga, pic and gif files to be used for rendering. +// In addition you can upload your own image. The image loading is provided by stb_image. +// The parameter imageFlags is combination of flags defined in NVGimageFlags. + +// Creates image by loading it from the disk from specified file name. +// Returns handle to the image. +int nvgCreateImage(NVGcontext* ctx, const char* filename, int imageFlags); + +// Creates image by loading it from the specified chunk of memory. +// Returns handle to the image. +int nvgCreateImageMem(NVGcontext* ctx, int imageFlags, unsigned char* data, int ndata); + +// Creates image from specified image data. +// Returns handle to the image. +int nvgCreateImageRGBA(NVGcontext* ctx, int w, int h, int imageFlags, const unsigned char* data); + +// Updates image data specified by image handle. +void nvgUpdateImage(NVGcontext* ctx, int image, const unsigned char* data); + +// Returns the dimensions of a created image. +void nvgImageSize(NVGcontext* ctx, int image, int* w, int* h); + +// Deletes created image. +void nvgDeleteImage(NVGcontext* ctx, int image); + +// +// Paints +// +// NanoVG supports four types of paints: linear gradient, box gradient, radial gradient and image pattern. +// These can be used as paints for strokes and fills. + +// Creates and returns a linear gradient. Parameters (sx,sy)-(ex,ey) specify the start and end coordinates +// of the linear gradient, icol specifies the start color and ocol the end color. +// The gradient is transformed by the current transform when it is passed to nvgFillPaint() or nvgStrokePaint(). +NVGpaint nvgLinearGradient(NVGcontext* ctx, float sx, float sy, float ex, float ey, + NVGcolor icol, NVGcolor ocol); + +// Creates and returns a box gradient. Box gradient is a feathered rounded rectangle, it is useful for rendering +// drop shadows or highlights for boxes. Parameters (x,y) define the top-left corner of the rectangle, +// (w,h) define the size of the rectangle, r defines the corner radius, and f feather. Feather defines how blurry +// the border of the rectangle is. Parameter icol specifies the inner color and ocol the outer color of the gradient. +// The gradient is transformed by the current transform when it is passed to nvgFillPaint() or nvgStrokePaint(). +NVGpaint nvgBoxGradient(NVGcontext* ctx, float x, float y, float w, float h, + float r, float f, NVGcolor icol, NVGcolor ocol); + +// Creates and returns a radial gradient. Parameters (cx,cy) specify the center, inr and outr specify +// the inner and outer radius of the gradient, icol specifies the start color and ocol the end color. +// The gradient is transformed by the current transform when it is passed to nvgFillPaint() or nvgStrokePaint(). +NVGpaint nvgRadialGradient(NVGcontext* ctx, float cx, float cy, float inr, float outr, + NVGcolor icol, NVGcolor ocol); + +// Creates and returns an image patter. Parameters (ox,oy) specify the left-top location of the image pattern, +// (ex,ey) the size of one image, angle rotation around the top-left corner, image is handle to the image to render. +// The gradient is transformed by the current transform when it is passed to nvgFillPaint() or nvgStrokePaint(). +NVGpaint nvgImagePattern(NVGcontext* ctx, float ox, float oy, float ex, float ey, + float angle, int image, float alpha); + +// +// Scissoring +// +// Scissoring allows you to clip the rendering into a rectangle. This is useful for various +// user interface cases like rendering a text edit or a timeline. + +// Sets the current scissor rectangle. +// The scissor rectangle is transformed by the current transform. +void nvgScissor(NVGcontext* ctx, float x, float y, float w, float h); + +// Intersects current scissor rectangle with the specified rectangle. +// The scissor rectangle is transformed by the current transform. +// Note: in case the rotation of previous scissor rect differs from +// the current one, the intersection will be done between the specified +// rectangle and the previous scissor rectangle transformed in the current +// transform space. The resulting shape is always rectangle. +void nvgIntersectScissor(NVGcontext* ctx, float x, float y, float w, float h); + +// Reset and disables scissoring. +void nvgResetScissor(NVGcontext* ctx); + +// +// Paths +// +// Drawing a new shape starts with nvgBeginPath(), it clears all the currently defined paths. +// Then you define one or more paths and sub-paths which describe the shape. The are functions +// to draw common shapes like rectangles and circles, and lower level step-by-step functions, +// which allow to define a path curve by curve. +// +// NanoVG uses even-odd fill rule to draw the shapes. Solid shapes should have counter clockwise +// winding and holes should have counter clockwise order. To specify winding of a path you can +// call nvgPathWinding(). This is useful especially for the common shapes, which are drawn CCW. +// +// Finally you can fill the path using current fill style by calling nvgFill(), and stroke it +// with current stroke style by calling nvgStroke(). +// +// The curve segments and sub-paths are transformed by the current transform. + +// Clears the current path and sub-paths. +void nvgBeginPath(NVGcontext* ctx); + +// Starts new sub-path with specified point as first point. +void nvgMoveTo(NVGcontext* ctx, float x, float y); + +// Adds line segment from the last point in the path to the specified point. +void nvgLineTo(NVGcontext* ctx, float x, float y); + +// Adds cubic bezier segment from last point in the path via two control points to the specified point. +void nvgBezierTo(NVGcontext* ctx, float c1x, float c1y, float c2x, float c2y, float x, float y); + +// Adds quadratic bezier segment from last point in the path via a control point to the specified point. +void nvgQuadTo(NVGcontext* ctx, float cx, float cy, float x, float y); + +// Adds an arc segment at the corner defined by the last path point, and two specified points. +void nvgArcTo(NVGcontext* ctx, float x1, float y1, float x2, float y2, float radius); + +// Closes current sub-path with a line segment. +void nvgClosePath(NVGcontext* ctx); + +// Sets the current sub-path winding, see NVGwinding and NVGsolidity. +void nvgPathWinding(NVGcontext* ctx, int dir); + +// Creates new circle arc shaped sub-path. The arc center is at cx,cy, the arc radius is r, +// and the arc is drawn from angle a0 to a1, and swept in direction dir (NVG_CCW, or NVG_CW). +// Angles are specified in radians. +void nvgArc(NVGcontext* ctx, float cx, float cy, float r, float a0, float a1, int dir); + +// Creates new rectangle shaped sub-path. +void nvgRect(NVGcontext* ctx, float x, float y, float w, float h); + +// Creates new rounded rectangle shaped sub-path. +void nvgRoundedRect(NVGcontext* ctx, float x, float y, float w, float h, float r); + +// Creates new rounded rectangle shaped sub-path with varying radii for each corner. +void nvgRoundedRectVarying(NVGcontext* ctx, float x, float y, float w, float h, float radTopLeft, float radTopRight, float radBottomRight, float radBottomLeft); + +// Creates new ellipse shaped sub-path. +void nvgEllipse(NVGcontext* ctx, float cx, float cy, float rx, float ry); + +// Creates new circle shaped sub-path. +void nvgCircle(NVGcontext* ctx, float cx, float cy, float r); + +// Fills the current path with current fill style. +void nvgFill(NVGcontext* ctx); + +// Fills the current path with current stroke style. +void nvgStroke(NVGcontext* ctx); + + +// +// Text +// +// NanoVG allows you to load .ttf files and use the font to render text. +// +// The appearance of the text can be defined by setting the current text style +// and by specifying the fill color. Common text and font settings such as +// font size, letter spacing and text align are supported. Font blur allows you +// to create simple text effects such as drop shadows. +// +// At render time the font face can be set based on the font handles or name. +// +// Font measure functions return values in local space, the calculations are +// carried in the same resolution as the final rendering. This is done because +// the text glyph positions are snapped to the nearest pixels sharp rendering. +// +// The local space means that values are not rotated or scale as per the current +// transformation. For example if you set font size to 12, which would mean that +// line height is 16, then regardless of the current scaling and rotation, the +// returned line height is always 16. Some measures may vary because of the scaling +// since aforementioned pixel snapping. +// +// While this may sound a little odd, the setup allows you to always render the +// same way regardless of scaling. I.e. following works regardless of scaling: +// +// const char* txt = "Text me up."; +// nvgTextBounds(vg, x,y, txt, NULL, bounds); +// nvgBeginPath(vg); +// nvgRoundedRect(vg, bounds[0],bounds[1], bounds[2]-bounds[0], bounds[3]-bounds[1]); +// nvgFill(vg); +// +// Note: currently only solid color fill is supported for text. + +// Creates font by loading it from the disk from specified file name. +// Returns handle to the font. +int nvgCreateFont(NVGcontext* ctx, const char* name, const char* filename); + +// fontIndex specifies which font face to load from a .ttf/.ttc file. +int nvgCreateFontAtIndex(NVGcontext* ctx, const char* name, const char* filename, const int fontIndex); + +// Creates font by loading it from the specified memory chunk. +// Returns handle to the font. +int nvgCreateFontMem(NVGcontext* ctx, const char* name, unsigned char* data, int ndata, int freeData); + +// fontIndex specifies which font face to load from a .ttf/.ttc file. +int nvgCreateFontMemAtIndex(NVGcontext* ctx, const char* name, unsigned char* data, int ndata, int freeData, const int fontIndex); + +// Finds a loaded font of specified name, and returns handle to it, or -1 if the font is not found. +int nvgFindFont(NVGcontext* ctx, const char* name); + +// Adds a fallback font by handle. +int nvgAddFallbackFontId(NVGcontext* ctx, int baseFont, int fallbackFont); + +// Adds a fallback font by name. +int nvgAddFallbackFont(NVGcontext* ctx, const char* baseFont, const char* fallbackFont); + +// Resets fallback fonts by handle. +void nvgResetFallbackFontsId(NVGcontext* ctx, int baseFont); + +// Resets fallback fonts by name. +void nvgResetFallbackFonts(NVGcontext* ctx, const char* baseFont); + +// Sets the font size of current text style. +void nvgFontSize(NVGcontext* ctx, float size); + +// Sets the blur of current text style. +void nvgFontBlur(NVGcontext* ctx, float blur); + +// Sets the letter spacing of current text style. +void nvgTextLetterSpacing(NVGcontext* ctx, float spacing); + +// Sets the proportional line height of current text style. The line height is specified as multiple of font size. +void nvgTextLineHeight(NVGcontext* ctx, float lineHeight); + +// Sets the text align of current text style, see NVGalign for options. +void nvgTextAlign(NVGcontext* ctx, int align); + +// Sets the font face based on specified id of current text style. +void nvgFontFaceId(NVGcontext* ctx, int font); + +// Sets the font face based on specified name of current text style. +void nvgFontFace(NVGcontext* ctx, const char* font); + +// Draws text string at specified location. If end is specified only the sub-string up to the end is drawn. +float nvgText(NVGcontext* ctx, float x, float y, const char* string, const char* end); + +// Draws multi-line text string at specified location wrapped at the specified width. If end is specified only the sub-string up to the end is drawn. +// White space is stripped at the beginning of the rows, the text is split at word boundaries or when new-line characters are encountered. +// Words longer than the max width are slit at nearest character (i.e. no hyphenation). +void nvgTextBox(NVGcontext* ctx, float x, float y, float breakRowWidth, const char* string, const char* end); + +// Measures the specified text string. Parameter bounds should be a pointer to float[4], +// if the bounding box of the text should be returned. The bounds value are [xmin,ymin, xmax,ymax] +// Returns the horizontal advance of the measured text (i.e. where the next character should drawn). +// Measured values are returned in local coordinate space. +float nvgTextBounds(NVGcontext* ctx, float x, float y, const char* string, const char* end, float* bounds); + +// Measures the specified multi-text string. Parameter bounds should be a pointer to float[4], +// if the bounding box of the text should be returned. The bounds value are [xmin,ymin, xmax,ymax] +// Measured values are returned in local coordinate space. +void nvgTextBoxBounds(NVGcontext* ctx, float x, float y, float breakRowWidth, const char* string, const char* end, float* bounds); + +// Calculates the glyph x positions of the specified text. If end is specified only the sub-string will be used. +// Measured values are returned in local coordinate space. +int nvgTextGlyphPositions(NVGcontext* ctx, float x, float y, const char* string, const char* end, NVGglyphPosition* positions, int maxPositions); + +// Returns the vertical metrics based on the current text style. +// Measured values are returned in local coordinate space. +void nvgTextMetrics(NVGcontext* ctx, float* ascender, float* descender, float* lineh); + +// Breaks the specified text into lines. If end is specified only the sub-string will be used. +// White space is stripped at the beginning of the rows, the text is split at word boundaries or when new-line characters are encountered. +// Words longer than the max width are slit at nearest character (i.e. no hyphenation). +int nvgTextBreakLines(NVGcontext* ctx, const char* string, const char* end, float breakRowWidth, NVGtextRow* rows, int maxRows); + +// +// Internal Render API +// +enum NVGtexture { + NVG_TEXTURE_ALPHA = 0x01, + NVG_TEXTURE_RGBA = 0x02, +}; + +struct NVGscissor { + float xform[6]; + float extent[2]; +}; +typedef struct NVGscissor NVGscissor; + +struct NVGvertex { + float x,y,u,v; +}; +typedef struct NVGvertex NVGvertex; + +struct NVGpath { + int first; + int count; + unsigned char closed; + int nbevel; + NVGvertex* fill; + int nfill; + NVGvertex* stroke; + int nstroke; + int winding; + int convex; +}; +typedef struct NVGpath NVGpath; + +struct NVGparams { + void* userPtr; + int edgeAntiAlias; + int (*renderCreate)(void* uptr); + int (*renderCreateTexture)(void* uptr, int type, int w, int h, int imageFlags, const unsigned char* data); + int (*renderDeleteTexture)(void* uptr, int image); + int (*renderUpdateTexture)(void* uptr, int image, int x, int y, int w, int h, const unsigned char* data); + int (*renderGetTextureSize)(void* uptr, int image, int* w, int* h); + void (*renderViewport)(void* uptr, float width, float height, float devicePixelRatio); + void (*renderCancel)(void* uptr); + void (*renderFlush)(void* uptr); + void (*renderFill)(void* uptr, NVGpaint* paint, NVGcompositeOperationState compositeOperation, NVGscissor* scissor, float fringe, const float* bounds, const NVGpath* paths, int npaths); + void (*renderStroke)(void* uptr, NVGpaint* paint, NVGcompositeOperationState compositeOperation, NVGscissor* scissor, float fringe, float strokeWidth, const NVGpath* paths, int npaths); + void (*renderTriangles)(void* uptr, NVGpaint* paint, NVGcompositeOperationState compositeOperation, NVGscissor* scissor, const NVGvertex* verts, int nverts, float fringe); + void (*renderDelete)(void* uptr); +}; +typedef struct NVGparams NVGparams; + +// Constructor and destructor, called by the render back-end. +NVGcontext* nvgCreateInternal(NVGparams* params); +void nvgDeleteInternal(NVGcontext* ctx); + +NVGparams* nvgInternalParams(NVGcontext* ctx); + +// Debug function to dump cached path data. +void nvgDebugDumpPathCache(NVGcontext* ctx); + +#ifdef _MSC_VER +#pragma warning(pop) +#endif + +#define NVG_NOTUSED(v) for (;;) { (void)(1 ? (void)0 : ( (void)(v) ) ); break; } + +#ifdef __cplusplus +} +#endif + +#endif // NANOVG_H diff --git a/troposphere/daybreak/nanovg/include/nanovg/dk_renderer.hpp b/troposphere/daybreak/nanovg/include/nanovg/dk_renderer.hpp new file mode 100644 index 000000000..d1dbb853e --- /dev/null +++ b/troposphere/daybreak/nanovg/include/nanovg/dk_renderer.hpp @@ -0,0 +1,207 @@ +#pragma once + +#include +#include +#include +#include + +#include "framework/CDescriptorSet.h" +#include "framework/CMemPool.h" +#include "framework/CShader.h" +#include "framework/CCmdMemRing.h" +#include "nanovg.h" + +// Create flags +enum NVGcreateFlags { + // Flag indicating if geometry based anti-aliasing is used (may not be needed when using MSAA). + NVG_ANTIALIAS = 1<<0, + // Flag indicating if strokes should be drawn using stencil buffer. The rendering will be a little + // slower, but path overlaps (i.e. self-intersecting or sharp turns) will be drawn just once. + NVG_STENCIL_STROKES = 1<<1, + // Flag indicating that additional debug checks are done. + NVG_DEBUG = 1<<2, +}; + +enum DKNVGuniformLoc +{ + DKNVG_LOC_VIEWSIZE, + DKNVG_LOC_TEX, + DKNVG_LOC_FRAG, + DKNVG_MAX_LOCS +}; + +enum VKNVGshaderType { + NSVG_SHADER_FILLGRAD, + NSVG_SHADER_FILLIMG, + NSVG_SHADER_SIMPLE, + NSVG_SHADER_IMG +}; + +struct DKNVGtextureDescriptor { + int width, height; + int type; + int flags; +}; + +struct DKNVGblend { + int srcRGB; + int dstRGB; + int srcAlpha; + int dstAlpha; +}; + +enum DKNVGcallType { + DKNVG_NONE = 0, + DKNVG_FILL, + DKNVG_CONVEXFILL, + DKNVG_STROKE, + DKNVG_TRIANGLES, +}; + +struct DKNVGcall { + int type; + int image; + int pathOffset; + int pathCount; + int triangleOffset; + int triangleCount; + int uniformOffset; + DKNVGblend blendFunc; +}; + +struct DKNVGpath { + int fillOffset; + int fillCount; + int strokeOffset; + int strokeCount; +}; + +struct DKNVGfragUniforms { + float scissorMat[12]; // matrices are actually 3 vec4s + float paintMat[12]; + struct NVGcolor innerCol; + struct NVGcolor outerCol; + float scissorExt[2]; + float scissorScale[2]; + float extent[2]; + float radius; + float feather; + float strokeMult; + float strokeThr; + int texType; + int type; +}; + +namespace nvg { + class DkRenderer; +} + +struct DKNVGcontext { + nvg::DkRenderer *renderer; + float view[2]; + int fragSize; + int flags; + // Per frame buffers + DKNVGcall* calls; + int ccalls; + int ncalls; + DKNVGpath* paths; + int cpaths; + int npaths; + struct NVGvertex* verts; + int cverts; + int nverts; + unsigned char* uniforms; + int cuniforms; + int nuniforms; +}; + +namespace nvg { + + class Texture { + private: + const int m_id; + dk::Image m_image; + dk::ImageDescriptor m_image_descriptor; + CMemPool::Handle m_image_mem; + DKNVGtextureDescriptor m_texture_descriptor; + public: + Texture(int id); + ~Texture(); + + void Initialize(CMemPool &image_pool, CMemPool &scratch_pool, dk::Device device, dk::Queue transfer_queue, int type, int w, int h, int image_flags, const u8 *data); + void Update(CMemPool &image_pool, CMemPool &scratch_pool, dk::Device device, dk::Queue transfer_queue, int type, int w, int h, int image_flags, const u8 *data); + + int GetId(); + const DKNVGtextureDescriptor &GetDescriptor(); + + dk::Image &GetImage(); + dk::ImageDescriptor &GetImageDescriptor(); + }; + + class DkRenderer { + private: + enum SamplerType : u8 { + SamplerType_MipFilter = 1 << 0, + SamplerType_Nearest = 1 << 1, + SamplerType_RepeatX = 1 << 2, + SamplerType_RepeatY = 1 << 3, + SamplerType_Total = 0x10, + }; + private: + static constexpr size_t DynamicCmdSize = 0x20000; + static constexpr size_t FragmentUniformSize = sizeof(DKNVGfragUniforms) + 4 - sizeof(DKNVGfragUniforms) % 4; + static constexpr size_t MaxImages = 0x1000; + + /* From the application. */ + u32 m_view_width; + u32 m_view_height; + dk::Device m_device; + dk::Queue m_queue; + CMemPool &m_image_mem_pool; + CMemPool &m_code_mem_pool; + CMemPool &m_data_mem_pool; + + /* State. */ + dk::UniqueCmdBuf m_dyn_cmd_buf; + CCmdMemRing<1> m_dyn_cmd_mem; + std::optional m_vertex_buffer; + CShader m_vertex_shader; + CShader m_fragment_shader; + CMemPool::Handle m_view_uniform_buffer; + CMemPool::Handle m_frag_uniform_buffer; + + u32 m_next_texture_id = 1; + std::vector> m_textures; + CDescriptorSet m_image_descriptor_set; + CDescriptorSet m_sampler_descriptor_set; + std::array m_image_descriptor_mappings; + int m_last_image_descriptor = 0; + + int AcquireImageDescriptor(std::shared_ptr texture, int image); + void FreeImageDescriptor(int image); + void SetUniforms(const DKNVGcontext &ctx, int offset, int image); + + void UpdateVertexBuffer(const void *data, size_t size); + + void DrawFill(const DKNVGcontext &ctx, const DKNVGcall &call); + void DrawConvexFill(const DKNVGcontext &ctx, const DKNVGcall &call); + void DrawStroke(const DKNVGcontext &ctx, const DKNVGcall &call); + void DrawTriangles(const DKNVGcontext &ctx, const DKNVGcall &call); + + std::shared_ptr FindTexture(int id); + public: + DkRenderer(unsigned int view_width, unsigned int view_height, dk::Device device, dk::Queue queue, CMemPool &image_mem_pool, CMemPool &code_mem_pool, CMemPool &data_mem_pool); + ~DkRenderer(); + + int Create(DKNVGcontext &ctx); + int CreateTexture(const DKNVGcontext &ctx, int type, int w, int h, int image_flags, const u8 *data); + int DeleteTexture(const DKNVGcontext &ctx, int id); + int UpdateTexture(const DKNVGcontext &ctx, int id, int x, int y, int w, int h, const u8 *data); + int GetTextureSize(const DKNVGcontext &ctx, int id, int *w, int *h); + const DKNVGtextureDescriptor *GetTextureDescriptor(const DKNVGcontext &ctx, int id); + + void Flush(DKNVGcontext &ctx); + }; + +} \ No newline at end of file diff --git a/troposphere/daybreak/nanovg/include/nanovg/fontstash.h b/troposphere/daybreak/nanovg/include/nanovg/fontstash.h new file mode 100644 index 000000000..e7da6019b --- /dev/null +++ b/troposphere/daybreak/nanovg/include/nanovg/fontstash.h @@ -0,0 +1,1785 @@ +// +// Copyright (c) 2009-2013 Mikko Mononen memon@inside.org +// +// This software is provided 'as-is', without any express or implied +// warranty. In no event will the authors be held liable for any damages +// arising from the use of this software. +// Permission is granted to anyone to use this software for any purpose, +// including commercial applications, and to alter it and redistribute it +// freely, subject to the following restrictions: +// 1. The origin of this software must not be misrepresented; you must not +// claim that you wrote the original software. If you use this software +// in a product, an acknowledgment in the product documentation would be +// appreciated but is not required. +// 2. Altered source versions must be plainly marked as such, and must not be +// misrepresented as being the original software. +// 3. This notice may not be removed or altered from any source distribution. +// + +#ifndef FONS_H +#define FONS_H + +#define FONS_INVALID -1 + +enum FONSflags { + FONS_ZERO_TOPLEFT = 1, + FONS_ZERO_BOTTOMLEFT = 2, +}; + +enum FONSalign { + // Horizontal align + FONS_ALIGN_LEFT = 1<<0, // Default + FONS_ALIGN_CENTER = 1<<1, + FONS_ALIGN_RIGHT = 1<<2, + // Vertical align + FONS_ALIGN_TOP = 1<<3, + FONS_ALIGN_MIDDLE = 1<<4, + FONS_ALIGN_BOTTOM = 1<<5, + FONS_ALIGN_BASELINE = 1<<6, // Default +}; + +enum FONSglyphBitmap { + FONS_GLYPH_BITMAP_OPTIONAL = 1, + FONS_GLYPH_BITMAP_REQUIRED = 2, +}; + +enum FONSerrorCode { + // Font atlas is full. + FONS_ATLAS_FULL = 1, + // Scratch memory used to render glyphs is full, requested size reported in 'val', you may need to bump up FONS_SCRATCH_BUF_SIZE. + FONS_SCRATCH_FULL = 2, + // Calls to fonsPushState has created too large stack, if you need deep state stack bump up FONS_MAX_STATES. + FONS_STATES_OVERFLOW = 3, + // Trying to pop too many states fonsPopState(). + FONS_STATES_UNDERFLOW = 4, +}; + +struct FONSparams { + int width, height; + unsigned char flags; + void* userPtr; + int (*renderCreate)(void* uptr, int width, int height); + int (*renderResize)(void* uptr, int width, int height); + void (*renderUpdate)(void* uptr, int* rect, const unsigned char* data); + void (*renderDraw)(void* uptr, const float* verts, const float* tcoords, const unsigned int* colors, int nverts); + void (*renderDelete)(void* uptr); +}; +typedef struct FONSparams FONSparams; + +struct FONSquad +{ + float x0,y0,s0,t0; + float x1,y1,s1,t1; +}; +typedef struct FONSquad FONSquad; + +struct FONStextIter { + float x, y, nextx, nexty, scale, spacing; + unsigned int codepoint; + short isize, iblur; + struct FONSfont* font; + int prevGlyphIndex; + const char* str; + const char* next; + const char* end; + unsigned int utf8state; + int bitmapOption; +}; +typedef struct FONStextIter FONStextIter; + +typedef struct FONScontext FONScontext; + +// Constructor and destructor. +FONScontext* fonsCreateInternal(FONSparams* params); +void fonsDeleteInternal(FONScontext* s); + +void fonsSetErrorCallback(FONScontext* s, void (*callback)(void* uptr, int error, int val), void* uptr); +// Returns current atlas size. +void fonsGetAtlasSize(FONScontext* s, int* width, int* height); +// Expands the atlas size. +int fonsExpandAtlas(FONScontext* s, int width, int height); +// Resets the whole stash. +int fonsResetAtlas(FONScontext* stash, int width, int height); + +// Add fonts +int fonsAddFont(FONScontext* s, const char* name, const char* path, int fontIndex); +int fonsAddFontMem(FONScontext* s, const char* name, unsigned char* data, int ndata, int freeData, int fontIndex); +int fonsGetFontByName(FONScontext* s, const char* name); + +// State handling +void fonsPushState(FONScontext* s); +void fonsPopState(FONScontext* s); +void fonsClearState(FONScontext* s); + +// State setting +void fonsSetSize(FONScontext* s, float size); +void fonsSetColor(FONScontext* s, unsigned int color); +void fonsSetSpacing(FONScontext* s, float spacing); +void fonsSetBlur(FONScontext* s, float blur); +void fonsSetAlign(FONScontext* s, int align); +void fonsSetFont(FONScontext* s, int font); + +// Draw text +float fonsDrawText(FONScontext* s, float x, float y, const char* string, const char* end); + +// Measure text +float fonsTextBounds(FONScontext* s, float x, float y, const char* string, const char* end, float* bounds); +void fonsLineBounds(FONScontext* s, float y, float* miny, float* maxy); +void fonsVertMetrics(FONScontext* s, float* ascender, float* descender, float* lineh); + +// Text iterator +int fonsTextIterInit(FONScontext* stash, FONStextIter* iter, float x, float y, const char* str, const char* end, int bitmapOption); +int fonsTextIterNext(FONScontext* stash, FONStextIter* iter, struct FONSquad* quad); + +// Pull texture changes +const unsigned char* fonsGetTextureData(FONScontext* stash, int* width, int* height); +int fonsValidateTexture(FONScontext* s, int* dirty); + +// Draws the stash texture for debugging +void fonsDrawDebug(FONScontext* s, float x, float y); + +#endif // FONTSTASH_H + + +#ifdef FONTSTASH_IMPLEMENTATION + +#define FONS_NOTUSED(v) (void)sizeof(v) + +#ifdef FONS_USE_FREETYPE + +#include +#include FT_FREETYPE_H +#include FT_ADVANCES_H +#include + +struct FONSttFontImpl { + FT_Face font; +}; +typedef struct FONSttFontImpl FONSttFontImpl; + +static FT_Library ftLibrary; + +int fons__tt_init(FONScontext *context) +{ + FT_Error ftError; + FONS_NOTUSED(context); + ftError = FT_Init_FreeType(&ftLibrary); + return ftError == 0; +} + +int fons__tt_done(FONScontext *context) +{ + FT_Error ftError; + FONS_NOTUSED(context); + ftError = FT_Done_FreeType(ftLibrary); + return ftError == 0; +} + +int fons__tt_loadFont(FONScontext *context, FONSttFontImpl *font, unsigned char *data, int dataSize, int fontIndex) +{ + FT_Error ftError; + FONS_NOTUSED(context); + + //font->font.userdata = stash; + ftError = FT_New_Memory_Face(ftLibrary, (const FT_Byte*)data, dataSize, fontIndex, &font->font); + return ftError == 0; +} + +void fons__tt_getFontVMetrics(FONSttFontImpl *font, int *ascent, int *descent, int *lineGap) +{ + *ascent = font->font->ascender; + *descent = font->font->descender; + *lineGap = font->font->height - (*ascent - *descent); +} + +float fons__tt_getPixelHeightScale(FONSttFontImpl *font, float size) +{ + return size / font->font->units_per_EM; +} + +int fons__tt_getGlyphIndex(FONSttFontImpl *font, int codepoint) +{ + return FT_Get_Char_Index(font->font, codepoint); +} + +int fons__tt_buildGlyphBitmap(FONSttFontImpl *font, int glyph, float size, float scale, + int *advance, int *lsb, int *x0, int *y0, int *x1, int *y1) +{ + FT_Error ftError; + FT_GlyphSlot ftGlyph; + FT_Fixed advFixed; + FONS_NOTUSED(scale); + + ftError = FT_Set_Pixel_Sizes(font->font, 0, size); + if (ftError) return 0; + ftError = FT_Load_Glyph(font->font, glyph, FT_LOAD_RENDER | FT_LOAD_FORCE_AUTOHINT); + if (ftError) return 0; + ftError = FT_Get_Advance(font->font, glyph, FT_LOAD_NO_SCALE, &advFixed); + if (ftError) return 0; + ftGlyph = font->font->glyph; + *advance = (int)advFixed; + *lsb = (int)ftGlyph->metrics.horiBearingX; + *x0 = ftGlyph->bitmap_left; + *x1 = *x0 + ftGlyph->bitmap.width; + *y0 = -ftGlyph->bitmap_top; + *y1 = *y0 + ftGlyph->bitmap.rows; + return 1; +} + +void fons__tt_renderGlyphBitmap(FONSttFontImpl *font, unsigned char *output, int outWidth, int outHeight, int outStride, + float scaleX, float scaleY, int glyph) +{ + FT_GlyphSlot ftGlyph = font->font->glyph; + int ftGlyphOffset = 0; + unsigned int x, y; + FONS_NOTUSED(outWidth); + FONS_NOTUSED(outHeight); + FONS_NOTUSED(scaleX); + FONS_NOTUSED(scaleY); + FONS_NOTUSED(glyph); // glyph has already been loaded by fons__tt_buildGlyphBitmap + + for ( y = 0; y < ftGlyph->bitmap.rows; y++ ) { + for ( x = 0; x < ftGlyph->bitmap.width; x++ ) { + output[(y * outStride) + x] = ftGlyph->bitmap.buffer[ftGlyphOffset++]; + } + } +} + +int fons__tt_getGlyphKernAdvance(FONSttFontImpl *font, int glyph1, int glyph2) +{ + FT_Vector ftKerning; + FT_Get_Kerning(font->font, glyph1, glyph2, FT_KERNING_DEFAULT, &ftKerning); + return (int)((ftKerning.x + 32) >> 6); // Round up and convert to integer +} + +#else + +#define STB_TRUETYPE_IMPLEMENTATION +static void* fons__tmpalloc(size_t size, void* up); +static void fons__tmpfree(void* ptr, void* up); +#define STBTT_malloc(x,u) fons__tmpalloc(x,u) +#define STBTT_free(x,u) fons__tmpfree(x,u) +#include "stb_truetype.h" + +struct FONSttFontImpl { + stbtt_fontinfo font; +}; +typedef struct FONSttFontImpl FONSttFontImpl; + +int fons__tt_init(FONScontext *context) +{ + FONS_NOTUSED(context); + return 1; +} + +int fons__tt_done(FONScontext *context) +{ + FONS_NOTUSED(context); + return 1; +} + +int fons__tt_loadFont(FONScontext *context, FONSttFontImpl *font, unsigned char *data, int dataSize, int fontIndex) +{ + int offset, stbError; + FONS_NOTUSED(dataSize); + + font->font.userdata = context; + offset = stbtt_GetFontOffsetForIndex(data, fontIndex); + if (offset == -1) { + stbError = 0; + } else { + stbError = stbtt_InitFont(&font->font, data, offset); + } + return stbError; +} + +void fons__tt_getFontVMetrics(FONSttFontImpl *font, int *ascent, int *descent, int *lineGap) +{ + stbtt_GetFontVMetrics(&font->font, ascent, descent, lineGap); +} + +float fons__tt_getPixelHeightScale(FONSttFontImpl *font, float size) +{ + return stbtt_ScaleForMappingEmToPixels(&font->font, size); +} + +int fons__tt_getGlyphIndex(FONSttFontImpl *font, int codepoint) +{ + return stbtt_FindGlyphIndex(&font->font, codepoint); +} + +int fons__tt_buildGlyphBitmap(FONSttFontImpl *font, int glyph, float size, float scale, + int *advance, int *lsb, int *x0, int *y0, int *x1, int *y1) +{ + FONS_NOTUSED(size); + stbtt_GetGlyphHMetrics(&font->font, glyph, advance, lsb); + stbtt_GetGlyphBitmapBox(&font->font, glyph, scale, scale, x0, y0, x1, y1); + return 1; +} + +void fons__tt_renderGlyphBitmap(FONSttFontImpl *font, unsigned char *output, int outWidth, int outHeight, int outStride, + float scaleX, float scaleY, int glyph) +{ + stbtt_MakeGlyphBitmap(&font->font, output, outWidth, outHeight, outStride, scaleX, scaleY, glyph); +} + +int fons__tt_getGlyphKernAdvance(FONSttFontImpl *font, int glyph1, int glyph2) +{ + return stbtt_GetGlyphKernAdvance(&font->font, glyph1, glyph2); +} + +#endif + +#ifndef FONS_SCRATCH_BUF_SIZE +# define FONS_SCRATCH_BUF_SIZE 96000 +#endif +#ifndef FONS_HASH_LUT_SIZE +# define FONS_HASH_LUT_SIZE 256 +#endif +#ifndef FONS_INIT_FONTS +# define FONS_INIT_FONTS 4 +#endif +#ifndef FONS_INIT_GLYPHS +# define FONS_INIT_GLYPHS 256 +#endif +#ifndef FONS_INIT_ATLAS_NODES +# define FONS_INIT_ATLAS_NODES 256 +#endif +#ifndef FONS_VERTEX_COUNT +# define FONS_VERTEX_COUNT 1024 +#endif +#ifndef FONS_MAX_STATES +# define FONS_MAX_STATES 20 +#endif +#ifndef FONS_MAX_FALLBACKS +# define FONS_MAX_FALLBACKS 20 +#endif + +static unsigned int fons__hashint(unsigned int a) +{ + a += ~(a<<15); + a ^= (a>>10); + a += (a<<3); + a ^= (a>>6); + a += ~(a<<11); + a ^= (a>>16); + return a; +} + +static int fons__mini(int a, int b) +{ + return a < b ? a : b; +} + +static int fons__maxi(int a, int b) +{ + return a > b ? a : b; +} + +struct FONSglyph +{ + unsigned int codepoint; + int index; + int next; + short size, blur; + short x0,y0,x1,y1; + short xadv,xoff,yoff; +}; +typedef struct FONSglyph FONSglyph; + +struct FONSfont +{ + FONSttFontImpl font; + char name[64]; + unsigned char* data; + int dataSize; + unsigned char freeData; + float ascender; + float descender; + float lineh; + FONSglyph* glyphs; + int cglyphs; + int nglyphs; + int lut[FONS_HASH_LUT_SIZE]; + int fallbacks[FONS_MAX_FALLBACKS]; + int nfallbacks; +}; +typedef struct FONSfont FONSfont; + +struct FONSstate +{ + int font; + int align; + float size; + unsigned int color; + float blur; + float spacing; +}; +typedef struct FONSstate FONSstate; + +struct FONSatlasNode { + short x, y, width; +}; +typedef struct FONSatlasNode FONSatlasNode; + +struct FONSatlas +{ + int width, height; + FONSatlasNode* nodes; + int nnodes; + int cnodes; +}; +typedef struct FONSatlas FONSatlas; + +struct FONScontext +{ + FONSparams params; + float itw,ith; + unsigned char* texData; + int dirtyRect[4]; + FONSfont** fonts; + FONSatlas* atlas; + int cfonts; + int nfonts; + float verts[FONS_VERTEX_COUNT*2]; + float tcoords[FONS_VERTEX_COUNT*2]; + unsigned int colors[FONS_VERTEX_COUNT]; + int nverts; + unsigned char* scratch; + int nscratch; + FONSstate states[FONS_MAX_STATES]; + int nstates; + void (*handleError)(void* uptr, int error, int val); + void* errorUptr; +}; + +#ifdef STB_TRUETYPE_IMPLEMENTATION + +static void* fons__tmpalloc(size_t size, void* up) +{ + unsigned char* ptr; + FONScontext* stash = (FONScontext*)up; + + // 16-byte align the returned pointer + size = (size + 0xf) & ~0xf; + + if (stash->nscratch+(int)size > FONS_SCRATCH_BUF_SIZE) { + if (stash->handleError) + stash->handleError(stash->errorUptr, FONS_SCRATCH_FULL, stash->nscratch+(int)size); + return NULL; + } + ptr = stash->scratch + stash->nscratch; + stash->nscratch += (int)size; + return ptr; +} + +static void fons__tmpfree(void* ptr, void* up) +{ + (void)ptr; + (void)up; + // empty +} + +#endif // STB_TRUETYPE_IMPLEMENTATION + +// Copyright (c) 2008-2010 Bjoern Hoehrmann +// See http://bjoern.hoehrmann.de/utf-8/decoder/dfa/ for details. + +#define FONS_UTF8_ACCEPT 0 +#define FONS_UTF8_REJECT 12 + +static unsigned int fons__decutf8(unsigned int* state, unsigned int* codep, unsigned int byte) +{ + static const unsigned char utf8d[] = { + // The first part of the table maps bytes to character classes that + // to reduce the size of the transition table and create bitmasks. + 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, + 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, + 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, + 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, + 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, 9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9, + 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7, 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7, + 8,8,2,2,2,2,2,2,2,2,2,2,2,2,2,2, 2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2, + 10,3,3,3,3,3,3,3,3,3,3,3,3,4,3,3, 11,6,6,6,5,8,8,8,8,8,8,8,8,8,8,8, + + // The second part is a transition table that maps a combination + // of a state of the automaton and a character class to a state. + 0,12,24,36,60,96,84,12,12,12,48,72, 12,12,12,12,12,12,12,12,12,12,12,12, + 12, 0,12,12,12,12,12, 0,12, 0,12,12, 12,24,12,12,12,12,12,24,12,24,12,12, + 12,12,12,12,12,12,12,24,12,12,12,12, 12,24,12,12,12,12,12,12,12,24,12,12, + 12,12,12,12,12,12,12,36,12,36,12,12, 12,36,12,12,12,12,12,36,12,36,12,12, + 12,36,12,12,12,12,12,12,12,12,12,12, + }; + + unsigned int type = utf8d[byte]; + + *codep = (*state != FONS_UTF8_ACCEPT) ? + (byte & 0x3fu) | (*codep << 6) : + (0xff >> type) & (byte); + + *state = utf8d[256 + *state + type]; + return *state; +} + +// Atlas based on Skyline Bin Packer by Jukka Jylänki + +static void fons__deleteAtlas(FONSatlas* atlas) +{ + if (atlas == NULL) return; + if (atlas->nodes != NULL) free(atlas->nodes); + free(atlas); +} + +static FONSatlas* fons__allocAtlas(int w, int h, int nnodes) +{ + FONSatlas* atlas = NULL; + + // Allocate memory for the font stash. + atlas = (FONSatlas*)malloc(sizeof(FONSatlas)); + if (atlas == NULL) goto error; + memset(atlas, 0, sizeof(FONSatlas)); + + atlas->width = w; + atlas->height = h; + + // Allocate space for skyline nodes + atlas->nodes = (FONSatlasNode*)malloc(sizeof(FONSatlasNode) * nnodes); + if (atlas->nodes == NULL) goto error; + memset(atlas->nodes, 0, sizeof(FONSatlasNode) * nnodes); + atlas->nnodes = 0; + atlas->cnodes = nnodes; + + // Init root node. + atlas->nodes[0].x = 0; + atlas->nodes[0].y = 0; + atlas->nodes[0].width = (short)w; + atlas->nnodes++; + + return atlas; + +error: + if (atlas) fons__deleteAtlas(atlas); + return NULL; +} + +static int fons__atlasInsertNode(FONSatlas* atlas, int idx, int x, int y, int w) +{ + int i; + // Insert node + if (atlas->nnodes+1 > atlas->cnodes) { + atlas->cnodes = atlas->cnodes == 0 ? 8 : atlas->cnodes * 2; + atlas->nodes = (FONSatlasNode*)realloc(atlas->nodes, sizeof(FONSatlasNode) * atlas->cnodes); + if (atlas->nodes == NULL) + return 0; + } + for (i = atlas->nnodes; i > idx; i--) + atlas->nodes[i] = atlas->nodes[i-1]; + atlas->nodes[idx].x = (short)x; + atlas->nodes[idx].y = (short)y; + atlas->nodes[idx].width = (short)w; + atlas->nnodes++; + + return 1; +} + +static void fons__atlasRemoveNode(FONSatlas* atlas, int idx) +{ + int i; + if (atlas->nnodes == 0) return; + for (i = idx; i < atlas->nnodes-1; i++) + atlas->nodes[i] = atlas->nodes[i+1]; + atlas->nnodes--; +} + +static void fons__atlasExpand(FONSatlas* atlas, int w, int h) +{ + // Insert node for empty space + if (w > atlas->width) + fons__atlasInsertNode(atlas, atlas->nnodes, atlas->width, 0, w - atlas->width); + atlas->width = w; + atlas->height = h; +} + +static void fons__atlasReset(FONSatlas* atlas, int w, int h) +{ + atlas->width = w; + atlas->height = h; + atlas->nnodes = 0; + + // Init root node. + atlas->nodes[0].x = 0; + atlas->nodes[0].y = 0; + atlas->nodes[0].width = (short)w; + atlas->nnodes++; +} + +static int fons__atlasAddSkylineLevel(FONSatlas* atlas, int idx, int x, int y, int w, int h) +{ + int i; + + // Insert new node + if (fons__atlasInsertNode(atlas, idx, x, y+h, w) == 0) + return 0; + + // Delete skyline segments that fall under the shadow of the new segment. + for (i = idx+1; i < atlas->nnodes; i++) { + if (atlas->nodes[i].x < atlas->nodes[i-1].x + atlas->nodes[i-1].width) { + int shrink = atlas->nodes[i-1].x + atlas->nodes[i-1].width - atlas->nodes[i].x; + atlas->nodes[i].x += (short)shrink; + atlas->nodes[i].width -= (short)shrink; + if (atlas->nodes[i].width <= 0) { + fons__atlasRemoveNode(atlas, i); + i--; + } else { + break; + } + } else { + break; + } + } + + // Merge same height skyline segments that are next to each other. + for (i = 0; i < atlas->nnodes-1; i++) { + if (atlas->nodes[i].y == atlas->nodes[i+1].y) { + atlas->nodes[i].width += atlas->nodes[i+1].width; + fons__atlasRemoveNode(atlas, i+1); + i--; + } + } + + return 1; +} + +static int fons__atlasRectFits(FONSatlas* atlas, int i, int w, int h) +{ + // Checks if there is enough space at the location of skyline span 'i', + // and return the max height of all skyline spans under that at that location, + // (think tetris block being dropped at that position). Or -1 if no space found. + int x = atlas->nodes[i].x; + int y = atlas->nodes[i].y; + int spaceLeft; + if (x + w > atlas->width) + return -1; + spaceLeft = w; + while (spaceLeft > 0) { + if (i == atlas->nnodes) return -1; + y = fons__maxi(y, atlas->nodes[i].y); + if (y + h > atlas->height) return -1; + spaceLeft -= atlas->nodes[i].width; + ++i; + } + return y; +} + +static int fons__atlasAddRect(FONSatlas* atlas, int rw, int rh, int* rx, int* ry) +{ + int besth = atlas->height, bestw = atlas->width, besti = -1; + int bestx = -1, besty = -1, i; + + // Bottom left fit heuristic. + for (i = 0; i < atlas->nnodes; i++) { + int y = fons__atlasRectFits(atlas, i, rw, rh); + if (y != -1) { + if (y + rh < besth || (y + rh == besth && atlas->nodes[i].width < bestw)) { + besti = i; + bestw = atlas->nodes[i].width; + besth = y + rh; + bestx = atlas->nodes[i].x; + besty = y; + } + } + } + + if (besti == -1) + return 0; + + // Perform the actual packing. + if (fons__atlasAddSkylineLevel(atlas, besti, bestx, besty, rw, rh) == 0) + return 0; + + *rx = bestx; + *ry = besty; + + return 1; +} + +static void fons__addWhiteRect(FONScontext* stash, int w, int h) +{ + int x, y, gx, gy; + unsigned char* dst; + if (fons__atlasAddRect(stash->atlas, w, h, &gx, &gy) == 0) + return; + + // Rasterize + dst = &stash->texData[gx + gy * stash->params.width]; + for (y = 0; y < h; y++) { + for (x = 0; x < w; x++) + dst[x] = 0xff; + dst += stash->params.width; + } + + stash->dirtyRect[0] = fons__mini(stash->dirtyRect[0], gx); + stash->dirtyRect[1] = fons__mini(stash->dirtyRect[1], gy); + stash->dirtyRect[2] = fons__maxi(stash->dirtyRect[2], gx+w); + stash->dirtyRect[3] = fons__maxi(stash->dirtyRect[3], gy+h); +} + +FONScontext* fonsCreateInternal(FONSparams* params) +{ + FONScontext* stash = NULL; + + // Allocate memory for the font stash. + stash = (FONScontext*)malloc(sizeof(FONScontext)); + if (stash == NULL) goto error; + memset(stash, 0, sizeof(FONScontext)); + + stash->params = *params; + + // Allocate scratch buffer. + stash->scratch = (unsigned char*)malloc(FONS_SCRATCH_BUF_SIZE); + if (stash->scratch == NULL) goto error; + + // Initialize implementation library + if (!fons__tt_init(stash)) goto error; + + if (stash->params.renderCreate != NULL) { + if (stash->params.renderCreate(stash->params.userPtr, stash->params.width, stash->params.height) == 0) + goto error; + } + + stash->atlas = fons__allocAtlas(stash->params.width, stash->params.height, FONS_INIT_ATLAS_NODES); + if (stash->atlas == NULL) goto error; + + // Allocate space for fonts. + stash->fonts = (FONSfont**)malloc(sizeof(FONSfont*) * FONS_INIT_FONTS); + if (stash->fonts == NULL) goto error; + memset(stash->fonts, 0, sizeof(FONSfont*) * FONS_INIT_FONTS); + stash->cfonts = FONS_INIT_FONTS; + stash->nfonts = 0; + + // Create texture for the cache. + stash->itw = 1.0f/stash->params.width; + stash->ith = 1.0f/stash->params.height; + stash->texData = (unsigned char*)malloc(stash->params.width * stash->params.height); + if (stash->texData == NULL) goto error; + memset(stash->texData, 0, stash->params.width * stash->params.height); + + stash->dirtyRect[0] = stash->params.width; + stash->dirtyRect[1] = stash->params.height; + stash->dirtyRect[2] = 0; + stash->dirtyRect[3] = 0; + + // Add white rect at 0,0 for debug drawing. + fons__addWhiteRect(stash, 2,2); + + fonsPushState(stash); + fonsClearState(stash); + + return stash; + +error: + fonsDeleteInternal(stash); + return NULL; +} + +static FONSstate* fons__getState(FONScontext* stash) +{ + return &stash->states[stash->nstates-1]; +} + +int fonsAddFallbackFont(FONScontext* stash, int base, int fallback) +{ + FONSfont* baseFont = stash->fonts[base]; + if (baseFont->nfallbacks < FONS_MAX_FALLBACKS) { + baseFont->fallbacks[baseFont->nfallbacks++] = fallback; + return 1; + } + return 0; +} + +void fonsResetFallbackFont(FONScontext* stash, int base) +{ + int i; + + FONSfont* baseFont = stash->fonts[base]; + baseFont->nfallbacks = 0; + baseFont->nglyphs = 0; + for (i = 0; i < FONS_HASH_LUT_SIZE; i++) + baseFont->lut[i] = -1; +} + +void fonsSetSize(FONScontext* stash, float size) +{ + fons__getState(stash)->size = size; +} + +void fonsSetColor(FONScontext* stash, unsigned int color) +{ + fons__getState(stash)->color = color; +} + +void fonsSetSpacing(FONScontext* stash, float spacing) +{ + fons__getState(stash)->spacing = spacing; +} + +void fonsSetBlur(FONScontext* stash, float blur) +{ + fons__getState(stash)->blur = blur; +} + +void fonsSetAlign(FONScontext* stash, int align) +{ + fons__getState(stash)->align = align; +} + +void fonsSetFont(FONScontext* stash, int font) +{ + fons__getState(stash)->font = font; +} + +void fonsPushState(FONScontext* stash) +{ + if (stash->nstates >= FONS_MAX_STATES) { + if (stash->handleError) + stash->handleError(stash->errorUptr, FONS_STATES_OVERFLOW, 0); + return; + } + if (stash->nstates > 0) + memcpy(&stash->states[stash->nstates], &stash->states[stash->nstates-1], sizeof(FONSstate)); + stash->nstates++; +} + +void fonsPopState(FONScontext* stash) +{ + if (stash->nstates <= 1) { + if (stash->handleError) + stash->handleError(stash->errorUptr, FONS_STATES_UNDERFLOW, 0); + return; + } + stash->nstates--; +} + +void fonsClearState(FONScontext* stash) +{ + FONSstate* state = fons__getState(stash); + state->size = 12.0f; + state->color = 0xffffffff; + state->font = 0; + state->blur = 0; + state->spacing = 0; + state->align = FONS_ALIGN_LEFT | FONS_ALIGN_BASELINE; +} + +static void fons__freeFont(FONSfont* font) +{ + if (font == NULL) return; + if (font->glyphs) free(font->glyphs); + if (font->freeData && font->data) free(font->data); + free(font); +} + +static int fons__allocFont(FONScontext* stash) +{ + FONSfont* font = NULL; + if (stash->nfonts+1 > stash->cfonts) { + stash->cfonts = stash->cfonts == 0 ? 8 : stash->cfonts * 2; + stash->fonts = (FONSfont**)realloc(stash->fonts, sizeof(FONSfont*) * stash->cfonts); + if (stash->fonts == NULL) + return -1; + } + font = (FONSfont*)malloc(sizeof(FONSfont)); + if (font == NULL) goto error; + memset(font, 0, sizeof(FONSfont)); + + font->glyphs = (FONSglyph*)malloc(sizeof(FONSglyph) * FONS_INIT_GLYPHS); + if (font->glyphs == NULL) goto error; + font->cglyphs = FONS_INIT_GLYPHS; + font->nglyphs = 0; + + stash->fonts[stash->nfonts++] = font; + return stash->nfonts-1; + +error: + fons__freeFont(font); + + return FONS_INVALID; +} + +int fonsAddFont(FONScontext* stash, const char* name, const char* path, int fontIndex) +{ + FILE* fp = 0; + int dataSize = 0; + size_t readed; + unsigned char* data = NULL; + + // Read in the font data. + fp = fopen(path, "rb"); + if (fp == NULL) goto error; + fseek(fp,0,SEEK_END); + dataSize = (int)ftell(fp); + fseek(fp,0,SEEK_SET); + data = (unsigned char*)malloc(dataSize); + if (data == NULL) goto error; + readed = fread(data, 1, dataSize, fp); + fclose(fp); + fp = 0; + if (readed != (size_t)dataSize) goto error; + + return fonsAddFontMem(stash, name, data, dataSize, 1, fontIndex); + +error: + if (data) free(data); + if (fp) fclose(fp); + return FONS_INVALID; +} + +int fonsAddFontMem(FONScontext* stash, const char* name, unsigned char* data, int dataSize, int freeData, int fontIndex) +{ + int i, ascent, descent, fh, lineGap; + FONSfont* font; + + int idx = fons__allocFont(stash); + if (idx == FONS_INVALID) + return FONS_INVALID; + + font = stash->fonts[idx]; + + strncpy(font->name, name, sizeof(font->name)); + font->name[sizeof(font->name)-1] = '\0'; + + // Init hash lookup. + for (i = 0; i < FONS_HASH_LUT_SIZE; ++i) + font->lut[i] = -1; + + // Read in the font data. + font->dataSize = dataSize; + font->data = data; + font->freeData = (unsigned char)freeData; + + // Init font + stash->nscratch = 0; + if (!fons__tt_loadFont(stash, &font->font, data, dataSize, fontIndex)) goto error; + + // Store normalized line height. The real line height is got + // by multiplying the lineh by font size. + fons__tt_getFontVMetrics( &font->font, &ascent, &descent, &lineGap); + ascent += lineGap; + fh = ascent - descent; + font->ascender = (float)ascent / (float)fh; + font->descender = (float)descent / (float)fh; + font->lineh = font->ascender - font->descender; + + return idx; + +error: + fons__freeFont(font); + stash->nfonts--; + return FONS_INVALID; +} + +int fonsGetFontByName(FONScontext* s, const char* name) +{ + int i; + for (i = 0; i < s->nfonts; i++) { + if (strcmp(s->fonts[i]->name, name) == 0) + return i; + } + return FONS_INVALID; +} + + +static FONSglyph* fons__allocGlyph(FONSfont* font) +{ + if (font->nglyphs+1 > font->cglyphs) { + font->cglyphs = font->cglyphs == 0 ? 8 : font->cglyphs * 2; + font->glyphs = (FONSglyph*)realloc(font->glyphs, sizeof(FONSglyph) * font->cglyphs); + if (font->glyphs == NULL) return NULL; + } + font->nglyphs++; + return &font->glyphs[font->nglyphs-1]; +} + + +// Based on Exponential blur, Jani Huhtanen, 2006 + +#define APREC 16 +#define ZPREC 7 + +static void fons__blurCols(unsigned char* dst, int w, int h, int dstStride, int alpha) +{ + int x, y; + for (y = 0; y < h; y++) { + int z = 0; // force zero border + for (x = 1; x < w; x++) { + z += (alpha * (((int)(dst[x]) << ZPREC) - z)) >> APREC; + dst[x] = (unsigned char)(z >> ZPREC); + } + dst[w-1] = 0; // force zero border + z = 0; + for (x = w-2; x >= 0; x--) { + z += (alpha * (((int)(dst[x]) << ZPREC) - z)) >> APREC; + dst[x] = (unsigned char)(z >> ZPREC); + } + dst[0] = 0; // force zero border + dst += dstStride; + } +} + +static void fons__blurRows(unsigned char* dst, int w, int h, int dstStride, int alpha) +{ + int x, y; + for (x = 0; x < w; x++) { + int z = 0; // force zero border + for (y = dstStride; y < h*dstStride; y += dstStride) { + z += (alpha * (((int)(dst[y]) << ZPREC) - z)) >> APREC; + dst[y] = (unsigned char)(z >> ZPREC); + } + dst[(h-1)*dstStride] = 0; // force zero border + z = 0; + for (y = (h-2)*dstStride; y >= 0; y -= dstStride) { + z += (alpha * (((int)(dst[y]) << ZPREC) - z)) >> APREC; + dst[y] = (unsigned char)(z >> ZPREC); + } + dst[0] = 0; // force zero border + dst++; + } +} + + +static void fons__blur(FONScontext* stash, unsigned char* dst, int w, int h, int dstStride, int blur) +{ + int alpha; + float sigma; + (void)stash; + + if (blur < 1) + return; + // Calculate the alpha such that 90% of the kernel is within the radius. (Kernel extends to infinity) + sigma = (float)blur * 0.57735f; // 1 / sqrt(3) + alpha = (int)((1< 20) iblur = 20; + pad = iblur+2; + + // Reset allocator. + stash->nscratch = 0; + + // Find code point and size. + h = fons__hashint(codepoint) & (FONS_HASH_LUT_SIZE-1); + i = font->lut[h]; + while (i != -1) { + if (font->glyphs[i].codepoint == codepoint && font->glyphs[i].size == isize && font->glyphs[i].blur == iblur) { + glyph = &font->glyphs[i]; + if (bitmapOption == FONS_GLYPH_BITMAP_OPTIONAL || (glyph->x0 >= 0 && glyph->y0 >= 0)) { + return glyph; + } + // At this point, glyph exists but the bitmap data is not yet created. + break; + } + i = font->glyphs[i].next; + } + + // Create a new glyph or rasterize bitmap data for a cached glyph. + g = fons__tt_getGlyphIndex(&font->font, codepoint); + // Try to find the glyph in fallback fonts. + if (g == 0) { + for (i = 0; i < font->nfallbacks; ++i) { + FONSfont* fallbackFont = stash->fonts[font->fallbacks[i]]; + int fallbackIndex = fons__tt_getGlyphIndex(&fallbackFont->font, codepoint); + if (fallbackIndex != 0) { + g = fallbackIndex; + renderFont = fallbackFont; + break; + } + } + // It is possible that we did not find a fallback glyph. + // In that case the glyph index 'g' is 0, and we'll proceed below and cache empty glyph. + } + scale = fons__tt_getPixelHeightScale(&renderFont->font, size); + fons__tt_buildGlyphBitmap(&renderFont->font, g, size, scale, &advance, &lsb, &x0, &y0, &x1, &y1); + gw = x1-x0 + pad*2; + gh = y1-y0 + pad*2; + + // Determines the spot to draw glyph in the atlas. + if (bitmapOption == FONS_GLYPH_BITMAP_REQUIRED) { + // Find free spot for the rect in the atlas + added = fons__atlasAddRect(stash->atlas, gw, gh, &gx, &gy); + if (added == 0 && stash->handleError != NULL) { + // Atlas is full, let the user to resize the atlas (or not), and try again. + stash->handleError(stash->errorUptr, FONS_ATLAS_FULL, 0); + added = fons__atlasAddRect(stash->atlas, gw, gh, &gx, &gy); + } + if (added == 0) return NULL; + } else { + // Negative coordinate indicates there is no bitmap data created. + gx = -1; + gy = -1; + } + + // Init glyph. + if (glyph == NULL) { + glyph = fons__allocGlyph(font); + glyph->codepoint = codepoint; + glyph->size = isize; + glyph->blur = iblur; + glyph->next = 0; + + // Insert char to hash lookup. + glyph->next = font->lut[h]; + font->lut[h] = font->nglyphs-1; + } + glyph->index = g; + glyph->x0 = (short)gx; + glyph->y0 = (short)gy; + glyph->x1 = (short)(glyph->x0+gw); + glyph->y1 = (short)(glyph->y0+gh); + glyph->xadv = (short)(scale * advance * 10.0f); + glyph->xoff = (short)(x0 - pad); + glyph->yoff = (short)(y0 - pad); + + if (bitmapOption == FONS_GLYPH_BITMAP_OPTIONAL) { + return glyph; + } + + // Rasterize + dst = &stash->texData[(glyph->x0+pad) + (glyph->y0+pad) * stash->params.width]; + fons__tt_renderGlyphBitmap(&renderFont->font, dst, gw-pad*2,gh-pad*2, stash->params.width, scale, scale, g); + + // Make sure there is one pixel empty border. + dst = &stash->texData[glyph->x0 + glyph->y0 * stash->params.width]; + for (y = 0; y < gh; y++) { + dst[y*stash->params.width] = 0; + dst[gw-1 + y*stash->params.width] = 0; + } + for (x = 0; x < gw; x++) { + dst[x] = 0; + dst[x + (gh-1)*stash->params.width] = 0; + } + + // Debug code to color the glyph background +/* unsigned char* fdst = &stash->texData[glyph->x0 + glyph->y0 * stash->params.width]; + for (y = 0; y < gh; y++) { + for (x = 0; x < gw; x++) { + int a = (int)fdst[x+y*stash->params.width] + 20; + if (a > 255) a = 255; + fdst[x+y*stash->params.width] = a; + } + }*/ + + // Blur + if (iblur > 0) { + stash->nscratch = 0; + bdst = &stash->texData[glyph->x0 + glyph->y0 * stash->params.width]; + fons__blur(stash, bdst, gw, gh, stash->params.width, iblur); + } + + stash->dirtyRect[0] = fons__mini(stash->dirtyRect[0], glyph->x0); + stash->dirtyRect[1] = fons__mini(stash->dirtyRect[1], glyph->y0); + stash->dirtyRect[2] = fons__maxi(stash->dirtyRect[2], glyph->x1); + stash->dirtyRect[3] = fons__maxi(stash->dirtyRect[3], glyph->y1); + + return glyph; +} + +static void fons__getQuad(FONScontext* stash, FONSfont* font, + int prevGlyphIndex, FONSglyph* glyph, + float scale, float spacing, float* x, float* y, FONSquad* q) +{ + float rx,ry,xoff,yoff,x0,y0,x1,y1; + + if (prevGlyphIndex != -1) { + float adv = fons__tt_getGlyphKernAdvance(&font->font, prevGlyphIndex, glyph->index) * scale; + *x += (int)(adv + spacing + 0.5f); + } + + // Each glyph has 2px border to allow good interpolation, + // one pixel to prevent leaking, and one to allow good interpolation for rendering. + // Inset the texture region by one pixel for correct interpolation. + xoff = (short)(glyph->xoff+1); + yoff = (short)(glyph->yoff+1); + x0 = (float)(glyph->x0+1); + y0 = (float)(glyph->y0+1); + x1 = (float)(glyph->x1-1); + y1 = (float)(glyph->y1-1); + + if (stash->params.flags & FONS_ZERO_TOPLEFT) { + rx = floorf(*x + xoff); + ry = floorf(*y + yoff); + + q->x0 = rx; + q->y0 = ry; + q->x1 = rx + x1 - x0; + q->y1 = ry + y1 - y0; + + q->s0 = x0 * stash->itw; + q->t0 = y0 * stash->ith; + q->s1 = x1 * stash->itw; + q->t1 = y1 * stash->ith; + } else { + rx = floorf(*x + xoff); + ry = floorf(*y - yoff); + + q->x0 = rx; + q->y0 = ry; + q->x1 = rx + x1 - x0; + q->y1 = ry - y1 + y0; + + q->s0 = x0 * stash->itw; + q->t0 = y0 * stash->ith; + q->s1 = x1 * stash->itw; + q->t1 = y1 * stash->ith; + } + + *x += (int)(glyph->xadv / 10.0f + 0.5f); +} + +static void fons__flush(FONScontext* stash) +{ + // Flush texture + if (stash->dirtyRect[0] < stash->dirtyRect[2] && stash->dirtyRect[1] < stash->dirtyRect[3]) { + if (stash->params.renderUpdate != NULL) + stash->params.renderUpdate(stash->params.userPtr, stash->dirtyRect, stash->texData); + // Reset dirty rect + stash->dirtyRect[0] = stash->params.width; + stash->dirtyRect[1] = stash->params.height; + stash->dirtyRect[2] = 0; + stash->dirtyRect[3] = 0; + } + + // Flush triangles + if (stash->nverts > 0) { + if (stash->params.renderDraw != NULL) + stash->params.renderDraw(stash->params.userPtr, stash->verts, stash->tcoords, stash->colors, stash->nverts); + stash->nverts = 0; + } +} + +static __inline void fons__vertex(FONScontext* stash, float x, float y, float s, float t, unsigned int c) +{ + stash->verts[stash->nverts*2+0] = x; + stash->verts[stash->nverts*2+1] = y; + stash->tcoords[stash->nverts*2+0] = s; + stash->tcoords[stash->nverts*2+1] = t; + stash->colors[stash->nverts] = c; + stash->nverts++; +} + +static float fons__getVertAlign(FONScontext* stash, FONSfont* font, int align, short isize) +{ + if (stash->params.flags & FONS_ZERO_TOPLEFT) { + if (align & FONS_ALIGN_TOP) { + return font->ascender * (float)isize/10.0f; + } else if (align & FONS_ALIGN_MIDDLE) { + return (font->ascender + font->descender) / 2.0f * (float)isize/10.0f; + } else if (align & FONS_ALIGN_BASELINE) { + return 0.0f; + } else if (align & FONS_ALIGN_BOTTOM) { + return font->descender * (float)isize/10.0f; + } + } else { + if (align & FONS_ALIGN_TOP) { + return -font->ascender * (float)isize/10.0f; + } else if (align & FONS_ALIGN_MIDDLE) { + return -(font->ascender + font->descender) / 2.0f * (float)isize/10.0f; + } else if (align & FONS_ALIGN_BASELINE) { + return 0.0f; + } else if (align & FONS_ALIGN_BOTTOM) { + return -font->descender * (float)isize/10.0f; + } + } + return 0.0; +} + +float fonsDrawText(FONScontext* stash, + float x, float y, + const char* str, const char* end) +{ + FONSstate* state = fons__getState(stash); + unsigned int codepoint; + unsigned int utf8state = 0; + FONSglyph* glyph = NULL; + FONSquad q; + int prevGlyphIndex = -1; + short isize = (short)(state->size*10.0f); + short iblur = (short)state->blur; + float scale; + FONSfont* font; + float width; + + if (stash == NULL) return x; + if (state->font < 0 || state->font >= stash->nfonts) return x; + font = stash->fonts[state->font]; + if (font->data == NULL) return x; + + scale = fons__tt_getPixelHeightScale(&font->font, (float)isize/10.0f); + + if (end == NULL) + end = str + strlen(str); + + // Align horizontally + if (state->align & FONS_ALIGN_LEFT) { + // empty + } else if (state->align & FONS_ALIGN_RIGHT) { + width = fonsTextBounds(stash, x,y, str, end, NULL); + x -= width; + } else if (state->align & FONS_ALIGN_CENTER) { + width = fonsTextBounds(stash, x,y, str, end, NULL); + x -= width * 0.5f; + } + // Align vertically. + y += fons__getVertAlign(stash, font, state->align, isize); + + for (; str != end; ++str) { + if (fons__decutf8(&utf8state, &codepoint, *(const unsigned char*)str)) + continue; + glyph = fons__getGlyph(stash, font, codepoint, isize, iblur, FONS_GLYPH_BITMAP_REQUIRED); + if (glyph != NULL) { + fons__getQuad(stash, font, prevGlyphIndex, glyph, scale, state->spacing, &x, &y, &q); + + if (stash->nverts+6 > FONS_VERTEX_COUNT) + fons__flush(stash); + + fons__vertex(stash, q.x0, q.y0, q.s0, q.t0, state->color); + fons__vertex(stash, q.x1, q.y1, q.s1, q.t1, state->color); + fons__vertex(stash, q.x1, q.y0, q.s1, q.t0, state->color); + + fons__vertex(stash, q.x0, q.y0, q.s0, q.t0, state->color); + fons__vertex(stash, q.x0, q.y1, q.s0, q.t1, state->color); + fons__vertex(stash, q.x1, q.y1, q.s1, q.t1, state->color); + } + prevGlyphIndex = glyph != NULL ? glyph->index : -1; + } + fons__flush(stash); + + return x; +} + +int fonsTextIterInit(FONScontext* stash, FONStextIter* iter, + float x, float y, const char* str, const char* end, int bitmapOption) +{ + FONSstate* state = fons__getState(stash); + float width; + + memset(iter, 0, sizeof(*iter)); + + if (stash == NULL) return 0; + if (state->font < 0 || state->font >= stash->nfonts) return 0; + iter->font = stash->fonts[state->font]; + if (iter->font->data == NULL) return 0; + + iter->isize = (short)(state->size*10.0f); + iter->iblur = (short)state->blur; + iter->scale = fons__tt_getPixelHeightScale(&iter->font->font, (float)iter->isize/10.0f); + + // Align horizontally + if (state->align & FONS_ALIGN_LEFT) { + // empty + } else if (state->align & FONS_ALIGN_RIGHT) { + width = fonsTextBounds(stash, x,y, str, end, NULL); + x -= width; + } else if (state->align & FONS_ALIGN_CENTER) { + width = fonsTextBounds(stash, x,y, str, end, NULL); + x -= width * 0.5f; + } + // Align vertically. + y += fons__getVertAlign(stash, iter->font, state->align, iter->isize); + + if (end == NULL) + end = str + strlen(str); + + iter->x = iter->nextx = x; + iter->y = iter->nexty = y; + iter->spacing = state->spacing; + iter->str = str; + iter->next = str; + iter->end = end; + iter->codepoint = 0; + iter->prevGlyphIndex = -1; + iter->bitmapOption = bitmapOption; + + return 1; +} + +int fonsTextIterNext(FONScontext* stash, FONStextIter* iter, FONSquad* quad) +{ + FONSglyph* glyph = NULL; + const char* str = iter->next; + iter->str = iter->next; + + if (str == iter->end) + return 0; + + for (; str != iter->end; str++) { + if (fons__decutf8(&iter->utf8state, &iter->codepoint, *(const unsigned char*)str)) + continue; + str++; + // Get glyph and quad + iter->x = iter->nextx; + iter->y = iter->nexty; + glyph = fons__getGlyph(stash, iter->font, iter->codepoint, iter->isize, iter->iblur, iter->bitmapOption); + // If the iterator was initialized with FONS_GLYPH_BITMAP_OPTIONAL, then the UV coordinates of the quad will be invalid. + if (glyph != NULL) + fons__getQuad(stash, iter->font, iter->prevGlyphIndex, glyph, iter->scale, iter->spacing, &iter->nextx, &iter->nexty, quad); + iter->prevGlyphIndex = glyph != NULL ? glyph->index : -1; + break; + } + iter->next = str; + + return 1; +} + +void fonsDrawDebug(FONScontext* stash, float x, float y) +{ + int i; + int w = stash->params.width; + int h = stash->params.height; + float u = w == 0 ? 0 : (1.0f / w); + float v = h == 0 ? 0 : (1.0f / h); + + if (stash->nverts+6+6 > FONS_VERTEX_COUNT) + fons__flush(stash); + + // Draw background + fons__vertex(stash, x+0, y+0, u, v, 0x0fffffff); + fons__vertex(stash, x+w, y+h, u, v, 0x0fffffff); + fons__vertex(stash, x+w, y+0, u, v, 0x0fffffff); + + fons__vertex(stash, x+0, y+0, u, v, 0x0fffffff); + fons__vertex(stash, x+0, y+h, u, v, 0x0fffffff); + fons__vertex(stash, x+w, y+h, u, v, 0x0fffffff); + + // Draw texture + fons__vertex(stash, x+0, y+0, 0, 0, 0xffffffff); + fons__vertex(stash, x+w, y+h, 1, 1, 0xffffffff); + fons__vertex(stash, x+w, y+0, 1, 0, 0xffffffff); + + fons__vertex(stash, x+0, y+0, 0, 0, 0xffffffff); + fons__vertex(stash, x+0, y+h, 0, 1, 0xffffffff); + fons__vertex(stash, x+w, y+h, 1, 1, 0xffffffff); + + // Drawbug draw atlas + for (i = 0; i < stash->atlas->nnodes; i++) { + FONSatlasNode* n = &stash->atlas->nodes[i]; + + if (stash->nverts+6 > FONS_VERTEX_COUNT) + fons__flush(stash); + + fons__vertex(stash, x+n->x+0, y+n->y+0, u, v, 0xc00000ff); + fons__vertex(stash, x+n->x+n->width, y+n->y+1, u, v, 0xc00000ff); + fons__vertex(stash, x+n->x+n->width, y+n->y+0, u, v, 0xc00000ff); + + fons__vertex(stash, x+n->x+0, y+n->y+0, u, v, 0xc00000ff); + fons__vertex(stash, x+n->x+0, y+n->y+1, u, v, 0xc00000ff); + fons__vertex(stash, x+n->x+n->width, y+n->y+1, u, v, 0xc00000ff); + } + + fons__flush(stash); +} + +float fonsTextBounds(FONScontext* stash, + float x, float y, + const char* str, const char* end, + float* bounds) +{ + FONSstate* state = fons__getState(stash); + unsigned int codepoint; + unsigned int utf8state = 0; + FONSquad q; + FONSglyph* glyph = NULL; + int prevGlyphIndex = -1; + short isize = (short)(state->size*10.0f); + short iblur = (short)state->blur; + float scale; + FONSfont* font; + float startx, advance; + float minx, miny, maxx, maxy; + + if (stash == NULL) return 0; + if (state->font < 0 || state->font >= stash->nfonts) return 0; + font = stash->fonts[state->font]; + if (font->data == NULL) return 0; + + scale = fons__tt_getPixelHeightScale(&font->font, (float)isize/10.0f); + + // Align vertically. + y += fons__getVertAlign(stash, font, state->align, isize); + + minx = maxx = x; + miny = maxy = y; + startx = x; + + if (end == NULL) + end = str + strlen(str); + + for (; str != end; ++str) { + if (fons__decutf8(&utf8state, &codepoint, *(const unsigned char*)str)) + continue; + glyph = fons__getGlyph(stash, font, codepoint, isize, iblur, FONS_GLYPH_BITMAP_OPTIONAL); + if (glyph != NULL) { + fons__getQuad(stash, font, prevGlyphIndex, glyph, scale, state->spacing, &x, &y, &q); + if (q.x0 < minx) minx = q.x0; + if (q.x1 > maxx) maxx = q.x1; + if (stash->params.flags & FONS_ZERO_TOPLEFT) { + if (q.y0 < miny) miny = q.y0; + if (q.y1 > maxy) maxy = q.y1; + } else { + if (q.y1 < miny) miny = q.y1; + if (q.y0 > maxy) maxy = q.y0; + } + } + prevGlyphIndex = glyph != NULL ? glyph->index : -1; + } + + advance = x - startx; + + // Align horizontally + if (state->align & FONS_ALIGN_LEFT) { + // empty + } else if (state->align & FONS_ALIGN_RIGHT) { + minx -= advance; + maxx -= advance; + } else if (state->align & FONS_ALIGN_CENTER) { + minx -= advance * 0.5f; + maxx -= advance * 0.5f; + } + + if (bounds) { + bounds[0] = minx; + bounds[1] = miny; + bounds[2] = maxx; + bounds[3] = maxy; + } + + return advance; +} + +void fonsVertMetrics(FONScontext* stash, + float* ascender, float* descender, float* lineh) +{ + FONSfont* font; + FONSstate* state = fons__getState(stash); + short isize; + + if (stash == NULL) return; + if (state->font < 0 || state->font >= stash->nfonts) return; + font = stash->fonts[state->font]; + isize = (short)(state->size*10.0f); + if (font->data == NULL) return; + + if (ascender) + *ascender = font->ascender*isize/10.0f; + if (descender) + *descender = font->descender*isize/10.0f; + if (lineh) + *lineh = font->lineh*isize/10.0f; +} + +void fonsLineBounds(FONScontext* stash, float y, float* miny, float* maxy) +{ + FONSfont* font; + FONSstate* state = fons__getState(stash); + short isize; + + if (stash == NULL) return; + if (state->font < 0 || state->font >= stash->nfonts) return; + font = stash->fonts[state->font]; + isize = (short)(state->size*10.0f); + if (font->data == NULL) return; + + y += fons__getVertAlign(stash, font, state->align, isize); + + if (stash->params.flags & FONS_ZERO_TOPLEFT) { + *miny = y - font->ascender * (float)isize/10.0f; + *maxy = *miny + font->lineh*isize/10.0f; + } else { + *maxy = y + font->descender * (float)isize/10.0f; + *miny = *maxy - font->lineh*isize/10.0f; + } +} + +const unsigned char* fonsGetTextureData(FONScontext* stash, int* width, int* height) +{ + if (width != NULL) + *width = stash->params.width; + if (height != NULL) + *height = stash->params.height; + return stash->texData; +} + +int fonsValidateTexture(FONScontext* stash, int* dirty) +{ + if (stash->dirtyRect[0] < stash->dirtyRect[2] && stash->dirtyRect[1] < stash->dirtyRect[3]) { + dirty[0] = stash->dirtyRect[0]; + dirty[1] = stash->dirtyRect[1]; + dirty[2] = stash->dirtyRect[2]; + dirty[3] = stash->dirtyRect[3]; + // Reset dirty rect + stash->dirtyRect[0] = stash->params.width; + stash->dirtyRect[1] = stash->params.height; + stash->dirtyRect[2] = 0; + stash->dirtyRect[3] = 0; + return 1; + } + return 0; +} + +void fonsDeleteInternal(FONScontext* stash) +{ + int i; + if (stash == NULL) return; + + if (stash->params.renderDelete) + stash->params.renderDelete(stash->params.userPtr); + + for (i = 0; i < stash->nfonts; ++i) + fons__freeFont(stash->fonts[i]); + + if (stash->atlas) fons__deleteAtlas(stash->atlas); + if (stash->fonts) free(stash->fonts); + if (stash->texData) free(stash->texData); + if (stash->scratch) free(stash->scratch); + free(stash); + fons__tt_done(stash); +} + +void fonsSetErrorCallback(FONScontext* stash, void (*callback)(void* uptr, int error, int val), void* uptr) +{ + if (stash == NULL) return; + stash->handleError = callback; + stash->errorUptr = uptr; +} + +void fonsGetAtlasSize(FONScontext* stash, int* width, int* height) +{ + if (stash == NULL) return; + *width = stash->params.width; + *height = stash->params.height; +} + +int fonsExpandAtlas(FONScontext* stash, int width, int height) +{ + int i, maxy = 0; + unsigned char* data = NULL; + if (stash == NULL) return 0; + + width = fons__maxi(width, stash->params.width); + height = fons__maxi(height, stash->params.height); + + if (width == stash->params.width && height == stash->params.height) + return 1; + + // Flush pending glyphs. + fons__flush(stash); + + // Create new texture + if (stash->params.renderResize != NULL) { + if (stash->params.renderResize(stash->params.userPtr, width, height) == 0) + return 0; + } + // Copy old texture data over. + data = (unsigned char*)malloc(width * height); + if (data == NULL) + return 0; + for (i = 0; i < stash->params.height; i++) { + unsigned char* dst = &data[i*width]; + unsigned char* src = &stash->texData[i*stash->params.width]; + memcpy(dst, src, stash->params.width); + if (width > stash->params.width) + memset(dst+stash->params.width, 0, width - stash->params.width); + } + if (height > stash->params.height) + memset(&data[stash->params.height * width], 0, (height - stash->params.height) * width); + + free(stash->texData); + stash->texData = data; + + // Increase atlas size + fons__atlasExpand(stash->atlas, width, height); + + // Add existing data as dirty. + for (i = 0; i < stash->atlas->nnodes; i++) + maxy = fons__maxi(maxy, stash->atlas->nodes[i].y); + stash->dirtyRect[0] = 0; + stash->dirtyRect[1] = 0; + stash->dirtyRect[2] = stash->params.width; + stash->dirtyRect[3] = maxy; + + stash->params.width = width; + stash->params.height = height; + stash->itw = 1.0f/stash->params.width; + stash->ith = 1.0f/stash->params.height; + + return 1; +} + +int fonsResetAtlas(FONScontext* stash, int width, int height) +{ + int i, j; + if (stash == NULL) return 0; + + // Flush pending glyphs. + fons__flush(stash); + + // Create new texture + if (stash->params.renderResize != NULL) { + if (stash->params.renderResize(stash->params.userPtr, width, height) == 0) + return 0; + } + + // Reset atlas + fons__atlasReset(stash->atlas, width, height); + + // Clear texture data. + stash->texData = (unsigned char*)realloc(stash->texData, width * height); + if (stash->texData == NULL) return 0; + memset(stash->texData, 0, width * height); + + // Reset dirty rect + stash->dirtyRect[0] = width; + stash->dirtyRect[1] = height; + stash->dirtyRect[2] = 0; + stash->dirtyRect[3] = 0; + + // Reset cached glyphs + for (i = 0; i < stash->nfonts; i++) { + FONSfont* font = stash->fonts[i]; + font->nglyphs = 0; + for (j = 0; j < FONS_HASH_LUT_SIZE; j++) + font->lut[j] = -1; + } + + stash->params.width = width; + stash->params.height = height; + stash->itw = 1.0f/stash->params.width; + stash->ith = 1.0f/stash->params.height; + + // Add white rect at 0,0 for debug drawing. + fons__addWhiteRect(stash, 2,2); + + return 1; +} + + +#endif diff --git a/troposphere/daybreak/nanovg/include/nanovg/framework/CApplication.h b/troposphere/daybreak/nanovg/include/nanovg/framework/CApplication.h new file mode 100644 index 000000000..2d804507b --- /dev/null +++ b/troposphere/daybreak/nanovg/include/nanovg/framework/CApplication.h @@ -0,0 +1,38 @@ +/* +** Sample Framework for deko3d Applications +** CApplication.h: Wrapper class containing common application boilerplate +*/ +#pragma once +#include "common.h" + +class CApplication +{ +protected: + virtual void onFocusState(AppletFocusState) { } + virtual void onOperationMode(AppletOperationMode) { } + virtual bool onFrame(u64) { return true; } + +public: + CApplication(); + ~CApplication(); + + void run(); + + static constexpr void chooseFramebufferSize(uint32_t& width, uint32_t& height, AppletOperationMode mode); +}; + +constexpr void CApplication::chooseFramebufferSize(uint32_t& width, uint32_t& height, AppletOperationMode mode) +{ + switch (mode) + { + default: + case AppletOperationMode_Handheld: + width = 1280; + height = 720; + break; + case AppletOperationMode_Docked: + width = 1920; + height = 1080; + break; + } +} diff --git a/troposphere/daybreak/nanovg/include/nanovg/framework/CCmdMemRing.h b/troposphere/daybreak/nanovg/include/nanovg/framework/CCmdMemRing.h new file mode 100644 index 000000000..3a8e1a00b --- /dev/null +++ b/troposphere/daybreak/nanovg/include/nanovg/framework/CCmdMemRing.h @@ -0,0 +1,57 @@ +/* +** Sample Framework for deko3d Applications +** CCmdMemRing.h: Memory provider class for dynamic command buffers +*/ +#pragma once +#include "common.h" +#include "CMemPool.h" + +template +class CCmdMemRing +{ + static_assert(NumSlices > 0, "Need a non-zero number of slices..."); + CMemPool::Handle m_mem; + unsigned m_curSlice; + dk::Fence m_fences[NumSlices]; +public: + CCmdMemRing() : m_mem{}, m_curSlice{}, m_fences{} { } + ~CCmdMemRing() + { + m_mem.destroy(); + } + + bool allocate(CMemPool& pool, uint32_t sliceSize) + { + sliceSize = (sliceSize + DK_CMDMEM_ALIGNMENT - 1) &~ (DK_CMDMEM_ALIGNMENT - 1); + m_mem = pool.allocate(NumSlices*sliceSize); + return m_mem; + } + + void begin(dk::CmdBuf cmdbuf) + { + // Clear/reset the command buffer, which also destroys all command list handles + // (but remember: it does *not* in fact destroy the command data) + cmdbuf.clear(); + + // Wait for the current slice of memory to be available, and feed it to the command buffer + uint32_t sliceSize = m_mem.getSize() / NumSlices; + m_fences[m_curSlice].wait(); + + // Feed the memory to the command buffer + cmdbuf.addMemory(m_mem.getMemBlock(), m_mem.getOffset() + m_curSlice * sliceSize, sliceSize); + } + + DkCmdList end(dk::CmdBuf cmdbuf) + { + // Signal the fence corresponding to the current slice; so that in the future when we want + // to use it again, we can wait for the completion of the commands we've just submitted + // (and as such we don't overwrite in-flight command data with new one) + cmdbuf.signalFence(m_fences[m_curSlice]); + + // Advance the current slice counter; wrapping around when we reach the end + m_curSlice = (m_curSlice + 1) % NumSlices; + + // Finish off the command list, returning it to the caller + return cmdbuf.finishList(); + } +}; diff --git a/troposphere/daybreak/nanovg/include/nanovg/framework/CDescriptorSet.h b/troposphere/daybreak/nanovg/include/nanovg/framework/CDescriptorSet.h new file mode 100644 index 000000000..6e4647919 --- /dev/null +++ b/troposphere/daybreak/nanovg/include/nanovg/framework/CDescriptorSet.h @@ -0,0 +1,71 @@ +/* +** Sample Framework for deko3d Applications +** CDescriptorSet.h: Image/Sampler descriptor set class +*/ +#pragma once +#include "common.h" +#include "CMemPool.h" + +template +class CDescriptorSet +{ + static_assert(NumDescriptors > 0, "Need a non-zero number of descriptors..."); + static_assert(sizeof(DkImageDescriptor) == sizeof(DkSamplerDescriptor), "shouldn't happen"); + static_assert(DK_IMAGE_DESCRIPTOR_ALIGNMENT == DK_SAMPLER_DESCRIPTOR_ALIGNMENT, "shouldn't happen"); + static constexpr size_t DescriptorSize = sizeof(DkImageDescriptor); + static constexpr size_t DescriptorAlign = DK_IMAGE_DESCRIPTOR_ALIGNMENT; + + CMemPool::Handle m_mem; +public: + CDescriptorSet() : m_mem{} { } + ~CDescriptorSet() + { + m_mem.destroy(); + } + + bool allocate(CMemPool& pool) + { + m_mem = pool.allocate(NumDescriptors*DescriptorSize, DescriptorAlign); + return m_mem; + } + + void bindForImages(dk::CmdBuf cmdbuf) + { + cmdbuf.bindImageDescriptorSet(m_mem.getGpuAddr(), NumDescriptors); + } + + void bindForSamplers(dk::CmdBuf cmdbuf) + { + cmdbuf.bindSamplerDescriptorSet(m_mem.getGpuAddr(), NumDescriptors); + } + + template + void update(dk::CmdBuf cmdbuf, uint32_t id, T const& descriptor) + { + static_assert(sizeof(T) == DescriptorSize); + cmdbuf.pushData(m_mem.getGpuAddr() + id*DescriptorSize, &descriptor, DescriptorSize); + } + + template + void update(dk::CmdBuf cmdbuf, uint32_t id, std::array const& descriptors) + { + static_assert(sizeof(T) == DescriptorSize); + cmdbuf.pushData(m_mem.getGpuAddr() + id*DescriptorSize, descriptors.data(), descriptors.size()*DescriptorSize); + } + +#ifdef DK_HPP_SUPPORT_VECTOR + template > + void update(dk::CmdBuf cmdbuf, uint32_t id, std::vector const& descriptors) + { + static_assert(sizeof(T) == DescriptorSize); + cmdbuf.pushData(m_mem.getGpuAddr() + id*DescriptorSize, descriptors.data(), descriptors.size()*DescriptorSize); + } +#endif + + template + void update(dk::CmdBuf cmdbuf, uint32_t id, std::initializer_list const& descriptors) + { + static_assert(sizeof(T) == DescriptorSize); + cmdbuf.pushData(m_mem.getGpuAddr() + id*DescriptorSize, descriptors.data(), descriptors.size()*DescriptorSize); + } +}; diff --git a/troposphere/daybreak/nanovg/include/nanovg/framework/CExternalImage.h b/troposphere/daybreak/nanovg/include/nanovg/framework/CExternalImage.h new file mode 100644 index 000000000..230e2e91f --- /dev/null +++ b/troposphere/daybreak/nanovg/include/nanovg/framework/CExternalImage.h @@ -0,0 +1,37 @@ +/* +** Sample Framework for deko3d Applications +** CExternalImage.h: Utility class for loading images from the filesystem +*/ +#pragma once +#include "common.h" +#include "CMemPool.h" + +class CExternalImage +{ + dk::Image m_image; + dk::ImageDescriptor m_descriptor; + CMemPool::Handle m_mem; +public: + CExternalImage() : m_image{}, m_descriptor{}, m_mem{} { } + ~CExternalImage() + { + m_mem.destroy(); + } + + constexpr operator bool() const + { + return m_mem; + } + + constexpr dk::Image& get() + { + return m_image; + } + + constexpr dk::ImageDescriptor const& getDescriptor() const + { + return m_descriptor; + } + + bool load(CMemPool& imagePool, CMemPool& scratchPool, dk::Device device, dk::Queue transferQueue, const char* path, uint32_t width, uint32_t height, DkImageFormat format, uint32_t flags = 0); +}; diff --git a/troposphere/daybreak/nanovg/include/nanovg/framework/CIntrusiveList.h b/troposphere/daybreak/nanovg/include/nanovg/framework/CIntrusiveList.h new file mode 100644 index 000000000..73eb5c8b5 --- /dev/null +++ b/troposphere/daybreak/nanovg/include/nanovg/framework/CIntrusiveList.h @@ -0,0 +1,119 @@ +/* +** Sample Framework for deko3d Applications +** CIntrusiveList.h: Intrusive doubly-linked list helper class +*/ +#pragma once +#include "common.h" + +template +struct CIntrusiveListNode +{ + T *m_next, *m_prev; + + constexpr CIntrusiveListNode() : m_next{}, m_prev{} { } + constexpr operator bool() const { return m_next || m_prev; } +}; + +template T::* node_ptr> +class CIntrusiveList +{ + T *m_first, *m_last; + +public: + constexpr CIntrusiveList() : m_first{}, m_last{} { } + + constexpr T* first() const { return m_first; } + constexpr T* last() const { return m_last; } + constexpr bool empty() const { return !m_first; } + constexpr void clear() { m_first = m_last = nullptr; } + + constexpr bool isLinked(T* obj) const { return obj->*node_ptr || m_first == obj; } + constexpr T* prev(T* obj) const { return (obj->*node_ptr).m_prev; } + constexpr T* next(T* obj) const { return (obj->*node_ptr).m_next; } + + void add(T* obj) + { + return addBefore(nullptr, obj); + } + + void addBefore(T* pos, T* obj) + { + auto& node = obj->*node_ptr; + node.m_next = pos; + node.m_prev = pos ? (pos->*node_ptr).m_prev : m_last; + + if (pos) + (pos->*node_ptr).m_prev = obj; + else + m_last = obj; + + if (node.m_prev) + (node.m_prev->*node_ptr).m_next = obj; + else + m_first = obj; + } + + void addAfter(T* pos, T* obj) + { + auto& node = obj->*node_ptr; + node.m_next = pos ? (pos->*node_ptr).m_next : m_first; + node.m_prev = pos; + + if (pos) + (pos->*node_ptr).m_next = obj; + else + m_first = obj; + + if (node.m_next) + (node.m_next->*node_ptr).m_prev = obj; + else + m_last = obj; + } + + T* pop() + { + T* ret = m_first; + if (ret) + { + m_first = (ret->*node_ptr).m_next; + if (m_first) + (m_first->*node_ptr).m_prev = nullptr; + else + m_last = nullptr; + } + return ret; + } + + void remove(T* obj) + { + auto& node = obj->*node_ptr; + if (node.m_prev) + { + (node.m_prev->*node_ptr).m_next = node.m_next; + if (node.m_next) + (node.m_next->*node_ptr).m_prev = node.m_prev; + else + m_last = node.m_prev; + } else + { + m_first = node.m_next; + if (m_first) + (m_first->*node_ptr).m_prev = nullptr; + else + m_last = nullptr; + } + + node.m_next = node.m_prev = 0; + } + + template + void iterate(L lambda) const + { + T* next = nullptr; + for (T* cur = m_first; cur; cur = next) + { + next = (cur->*node_ptr).m_next; + lambda(cur); + } + } +}; diff --git a/troposphere/daybreak/nanovg/include/nanovg/framework/CIntrusiveTree.h b/troposphere/daybreak/nanovg/include/nanovg/framework/CIntrusiveTree.h new file mode 100644 index 000000000..9796ee6ba --- /dev/null +++ b/troposphere/daybreak/nanovg/include/nanovg/framework/CIntrusiveTree.h @@ -0,0 +1,250 @@ +/* +** Sample Framework for deko3d Applications +** CIntrusiveTree.h: Intrusive red-black tree helper class +*/ +#pragma once +#include "common.h" + +#include + +struct CIntrusiveTreeNode +{ + enum Color + { + Red, + Black, + }; + + enum Leaf + { + Left, + Right, + }; + +private: + uintptr_t m_parent_color; + CIntrusiveTreeNode* m_children[2]; + +public: + constexpr CIntrusiveTreeNode() : m_parent_color{}, m_children{} { } + + constexpr CIntrusiveTreeNode* getParent() const + { + return reinterpret_cast(m_parent_color &~ 1); + } + + void setParent(CIntrusiveTreeNode* parent) + { + m_parent_color = (m_parent_color & 1) | reinterpret_cast(parent); + } + + constexpr Color getColor() const + { + return static_cast(m_parent_color & 1); + } + + void setColor(Color color) + { + m_parent_color = (m_parent_color &~ 1) | static_cast(color); + } + + constexpr CIntrusiveTreeNode*& child(Leaf leaf) + { + return m_children[leaf]; + } + + constexpr CIntrusiveTreeNode* const& child(Leaf leaf) const + { + return m_children[leaf]; + } + + //-------------------------------------- + + constexpr bool isRed() const { return getColor() == Red; } + constexpr bool isBlack() const { return getColor() == Black; } + void setRed() { setColor(Red); } + void setBlack() { setColor(Black); } + + constexpr CIntrusiveTreeNode*& left() { return child(Left); } + constexpr CIntrusiveTreeNode*& right() { return child(Right); } + constexpr CIntrusiveTreeNode* const& left() const { return child(Left); } + constexpr CIntrusiveTreeNode* const& right() const { return child(Right); } +}; + +NX_CONSTEXPR CIntrusiveTreeNode::Leaf operator!(CIntrusiveTreeNode::Leaf val) noexcept +{ + return static_cast(!static_cast(val)); +} + +class CIntrusiveTreeBase +{ + using N = CIntrusiveTreeNode; + + void rotate(N* node, N::Leaf leaf); + void recolor(N* parent, N* node); +protected: + N* m_root; + + constexpr CIntrusiveTreeBase() : m_root{} { } + + N* walk(N* node, N::Leaf leaf) const; + void insert(N* node, N* parent); + void remove(N* node); + + N* minmax(N::Leaf leaf) const + { + N* p = m_root; + if (!p) + return nullptr; + while (p->child(leaf)) + p = p->child(leaf); + return p; + } + + template + N*& navigate(N*& node, N*& parent, N::Leaf leafOnEqual, H helm) const + { + node = nullptr; + parent = nullptr; + + N** point = const_cast(&m_root); + while (*point) + { + int direction = helm(*point); + parent = *point; + if (direction < 0) + point = &(*point)->left(); + else if (direction > 0) + point = &(*point)->right(); + else + { + node = *point; + point = &(*point)->child(leafOnEqual); + } + } + return *point; + } +}; + +template +constexpr ClassT* parent_obj(MemberT* member, MemberT ClassT::* ptr) +{ + union whatever + { + MemberT ClassT::* ptr; + intptr_t offset; + }; + // This is technically UB, but basically every compiler worth using admits it as an extension + return (ClassT*)((intptr_t)member - whatever{ptr}.offset); +} + +template < + typename T, + CIntrusiveTreeNode T::* node_ptr, + typename Comparator = std::less<> +> +class CIntrusiveTree final : protected CIntrusiveTreeBase +{ + using N = CIntrusiveTreeNode; + + static constexpr T* toType(N* m) + { + return m ? parent_obj(m, node_ptr) : nullptr; + } + + static constexpr N* toNode(T* m) + { + return m ? &(m->*node_ptr) : nullptr; + } + + template + static int compare(A const& a, B const& b) + { + Comparator comp; + if (comp(a, b)) + return -1; + if (comp(b, a)) + return 1; + return 0; + } + +public: + constexpr CIntrusiveTree() : CIntrusiveTreeBase{} { } + + T* first() const { return toType(minmax(N::Left)); } + T* last() const { return toType(minmax(N::Right)); } + bool empty() const { return m_root != nullptr; } + void clear() { m_root = nullptr; } + + T* prev(T* node) const { return toType(walk(toNode(node), N::Left)); } + T* next(T* node) const { return toType(walk(toNode(node), N::Right)); } + + enum SearchMode + { + Exact = 0, + LowerBound = 1, + UpperBound = 2, + }; + + template + T* search(SearchMode mode, Lambda lambda) const + { + N *node, *parent; + N*& point = navigate(node, parent, + mode != UpperBound ? N::Left : N::Right, + [&lambda](N* curnode) { return lambda(toType(curnode)); }); + + switch (mode) + { + default: + case Exact: + break; + case LowerBound: + if (!node && parent) + { + if (&parent->left() == &point) + node = parent; + else + node = walk(parent, N::Right); + } + break; + case UpperBound: + if (node) + node = walk(node, N::Right); + else if (parent) + { + if (&parent->right() == &point) + node = walk(parent, N::Right); + else + node = parent; + } + break; + } + return toType(node); + } + + template + T* find(K const& key, SearchMode mode = Exact) const + { + return search(mode, [&key](T* obj) { return compare(key, *obj); }); + } + + T* insert(T* obj, bool allow_dupes = false) + { + N *node, *parent; + N*& point = navigate(node, parent, N::Right, + [obj](N* curnode) { return compare(*obj, *toType(curnode)); }); + + if (node && !allow_dupes) + return toType(node); + + point = toNode(obj); + CIntrusiveTreeBase::insert(point, parent); + return obj; + } + + void remove(T* obj) + { + CIntrusiveTreeBase::remove(toNode(obj)); + } +}; diff --git a/troposphere/daybreak/nanovg/include/nanovg/framework/CMemPool.h b/troposphere/daybreak/nanovg/include/nanovg/framework/CMemPool.h new file mode 100644 index 000000000..978755cd2 --- /dev/null +++ b/troposphere/daybreak/nanovg/include/nanovg/framework/CMemPool.h @@ -0,0 +1,120 @@ +/* +** Sample Framework for deko3d Applications +** CMemPool.h: Pooled dynamic memory allocation manager class +*/ +#pragma once +#include "common.h" +#include "CIntrusiveList.h" +#include "CIntrusiveTree.h" + +class CMemPool +{ + dk::Device m_dev; + uint32_t m_flags; + uint32_t m_blockSize; + + struct Block + { + CIntrusiveListNode m_node; + dk::MemBlock m_obj; + void* m_cpuAddr; + DkGpuAddr m_gpuAddr; + + constexpr void* cpuOffset(uint32_t offset) const + { + return m_cpuAddr ? ((u8*)m_cpuAddr + offset) : nullptr; + } + + constexpr DkGpuAddr gpuOffset(uint32_t offset) const + { + return m_gpuAddr != DK_GPU_ADDR_INVALID ? (m_gpuAddr + offset) : DK_GPU_ADDR_INVALID; + } + }; + + CIntrusiveList m_blocks; + + struct Slice + { + CIntrusiveListNode m_node; + CIntrusiveTreeNode m_treenode; + CMemPool* m_pool; + Block* m_block; + uint32_t m_start; + uint32_t m_end; + + constexpr uint32_t getSize() const { return m_end - m_start; } + constexpr bool canCoalesce(Slice const& rhs) const { return m_pool == rhs.m_pool && m_block == rhs.m_block && m_end == rhs.m_start; } + + constexpr bool operator<(Slice const& rhs) const { return getSize() < rhs.getSize(); } + constexpr bool operator<(uint32_t rhs) const { return getSize() < rhs; } + }; + + friend constexpr bool operator<(uint32_t lhs, Slice const& rhs); + + CIntrusiveList m_memMap, m_sliceHeap; + CIntrusiveTree m_freeList; + + Slice* _newSlice(); + void _deleteSlice(Slice*); + + void _destroy(Slice* slice); + +public: + static constexpr uint32_t DefaultBlockSize = 0x800000; + class Handle + { + Slice* m_slice; + public: + constexpr Handle(Slice* slice = nullptr) : m_slice{slice} { } + constexpr operator bool() const { return m_slice != nullptr; } + constexpr operator Slice*() const { return m_slice; } + constexpr bool operator!() const { return !m_slice; } + constexpr bool operator==(Handle const& rhs) const { return m_slice == rhs.m_slice; } + constexpr bool operator!=(Handle const& rhs) const { return m_slice != rhs.m_slice; } + + void destroy() + { + if (m_slice) + { + m_slice->m_pool->_destroy(m_slice); + m_slice = nullptr; + } + } + + constexpr dk::MemBlock getMemBlock() const + { + return m_slice->m_block->m_obj; + } + + constexpr uint32_t getOffset() const + { + return m_slice->m_start; + } + + constexpr uint32_t getSize() const + { + return m_slice->getSize(); + } + + constexpr void* getCpuAddr() const + { + return m_slice->m_block->cpuOffset(m_slice->m_start); + } + + constexpr DkGpuAddr getGpuAddr() const + { + return m_slice->m_block->gpuOffset(m_slice->m_start); + } + }; + + CMemPool(dk::Device dev, uint32_t flags = DkMemBlockFlags_CpuUncached | DkMemBlockFlags_GpuCached, uint32_t blockSize = DefaultBlockSize) : + m_dev{dev}, m_flags{flags}, m_blockSize{blockSize}, m_blocks{}, m_memMap{}, m_sliceHeap{}, m_freeList{} { } + ~CMemPool(); + + Handle allocate(uint32_t size, uint32_t alignment = DK_CMDMEM_ALIGNMENT); +}; + +constexpr bool operator<(uint32_t lhs, CMemPool::Slice const& rhs) +{ + return lhs < rhs.getSize(); +} diff --git a/troposphere/daybreak/nanovg/include/nanovg/framework/CShader.h b/troposphere/daybreak/nanovg/include/nanovg/framework/CShader.h new file mode 100644 index 000000000..b39dfe01b --- /dev/null +++ b/troposphere/daybreak/nanovg/include/nanovg/framework/CShader.h @@ -0,0 +1,31 @@ +/* +** Sample Framework for deko3d Applications +** CShader.h: Utility class for loading shaders from the filesystem +*/ +#pragma once +#include "common.h" +#include "CMemPool.h" + +class CShader +{ + dk::Shader m_shader; + CMemPool::Handle m_codemem; +public: + CShader() : m_shader{}, m_codemem{} { } + ~CShader() + { + m_codemem.destroy(); + } + + constexpr operator bool() const + { + return m_codemem; + } + + constexpr operator dk::Shader const*() const + { + return &m_shader; + } + + bool load(CMemPool& pool, const char* path); +}; diff --git a/troposphere/daybreak/nanovg/include/nanovg/framework/FileLoader.h b/troposphere/daybreak/nanovg/include/nanovg/framework/FileLoader.h new file mode 100644 index 000000000..3455c87d1 --- /dev/null +++ b/troposphere/daybreak/nanovg/include/nanovg/framework/FileLoader.h @@ -0,0 +1,9 @@ +/* +** Sample Framework for deko3d Applications +** FileLoader.h: Helpers for loading data from the filesystem directly into GPU memory +*/ +#pragma once +#include "common.h" +#include "CMemPool.h" + +CMemPool::Handle LoadFile(CMemPool& pool, const char* path, uint32_t alignment = DK_CMDMEM_ALIGNMENT); diff --git a/troposphere/daybreak/nanovg/include/nanovg/framework/common.h b/troposphere/daybreak/nanovg/include/nanovg/framework/common.h new file mode 100644 index 000000000..814e49928 --- /dev/null +++ b/troposphere/daybreak/nanovg/include/nanovg/framework/common.h @@ -0,0 +1,12 @@ +/* +** Sample Framework for deko3d Applications +** common.h: Common includes +*/ +#pragma once +#include +#include +#include + +#include + +#include diff --git a/troposphere/daybreak/nanovg/include/nanovg/nanovg_gl_utils.h b/troposphere/daybreak/nanovg/include/nanovg/nanovg_gl_utils.h new file mode 100644 index 000000000..f7d73ee53 --- /dev/null +++ b/troposphere/daybreak/nanovg/include/nanovg/nanovg_gl_utils.h @@ -0,0 +1,158 @@ +// +// Copyright (c) 2009-2013 Mikko Mononen memon@inside.org +// +// This software is provided 'as-is', without any express or implied +// warranty. In no event will the authors be held liable for any damages +// arising from the use of this software. +// Permission is granted to anyone to use this software for any purpose, +// including commercial applications, and to alter it and redistribute it +// freely, subject to the following restrictions: +// 1. The origin of this software must not be misrepresented; you must not +// claim that you wrote the original software. If you use this software +// in a product, an acknowledgment in the product documentation would be +// appreciated but is not required. +// 2. Altered source versions must be plainly marked as such, and must not be +// misrepresented as being the original software. +// 3. This notice may not be removed or altered from any source distribution. +// +#ifndef NANOVG_GL_UTILS_H +#define NANOVG_GL_UTILS_H + +#ifdef USE_OPENGL + +struct NVGLUframebuffer { + NVGcontext* ctx; + GLuint fbo; + GLuint rbo; + GLuint texture; + int image; +}; +typedef struct NVGLUframebuffer NVGLUframebuffer; + +// Helper function to create GL frame buffer to render to. +void nvgluBindFramebuffer(NVGLUframebuffer* fb); +NVGLUframebuffer* nvgluCreateFramebuffer(NVGcontext* ctx, int w, int h, int imageFlags); +void nvgluDeleteFramebuffer(NVGLUframebuffer* fb); + +#endif // NANOVG_GL_UTILS_H + +#ifdef NANOVG_GL_IMPLEMENTATION + +#if defined(NANOVG_GL3) || defined(NANOVG_GLES2) || defined(NANOVG_GLES3) +// FBO is core in OpenGL 3>. +# define NANOVG_FBO_VALID 1 +#elif defined(NANOVG_GL2) +// On OS X including glext defines FBO on GL2 too. +# ifdef __APPLE__ +# include +# define NANOVG_FBO_VALID 1 +# endif +#endif + +static GLint defaultFBO = -1; + +NVGLUframebuffer* nvgluCreateFramebuffer(NVGcontext* ctx, int w, int h, int imageFlags) +{ +#ifdef NANOVG_FBO_VALID + GLint defaultFBO; + GLint defaultRBO; + NVGLUframebuffer* fb = NULL; + + glGetIntegerv(GL_FRAMEBUFFER_BINDING, &defaultFBO); + glGetIntegerv(GL_RENDERBUFFER_BINDING, &defaultRBO); + + fb = (NVGLUframebuffer*)malloc(sizeof(NVGLUframebuffer)); + if (fb == NULL) goto error; + memset(fb, 0, sizeof(NVGLUframebuffer)); + + fb->image = nvgCreateImageRGBA(ctx, w, h, imageFlags | NVG_IMAGE_FLIPY | NVG_IMAGE_PREMULTIPLIED, NULL); + +#if defined NANOVG_GL2 + fb->texture = nvglImageHandleGL2(ctx, fb->image); +#elif defined NANOVG_GL3 + fb->texture = nvglImageHandleGL3(ctx, fb->image); +#elif defined NANOVG_GLES2 + fb->texture = nvglImageHandleGLES2(ctx, fb->image); +#elif defined NANOVG_GLES3 + fb->texture = nvglImageHandleGLES3(ctx, fb->image); +#endif + + fb->ctx = ctx; + + // frame buffer object + glGenFramebuffers(1, &fb->fbo); + glBindFramebuffer(GL_FRAMEBUFFER, fb->fbo); + + // render buffer object + glGenRenderbuffers(1, &fb->rbo); + glBindRenderbuffer(GL_RENDERBUFFER, fb->rbo); + glRenderbufferStorage(GL_RENDERBUFFER, GL_STENCIL_INDEX8, w, h); + + // combine all + glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, fb->texture, 0); + glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_STENCIL_ATTACHMENT, GL_RENDERBUFFER, fb->rbo); + + if (glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE) { +#ifdef GL_DEPTH24_STENCIL8 + // If GL_STENCIL_INDEX8 is not supported, try GL_DEPTH24_STENCIL8 as a fallback. + // Some graphics cards require a depth buffer along with a stencil. + glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH24_STENCIL8, w, h); + glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, fb->texture, 0); + glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_STENCIL_ATTACHMENT, GL_RENDERBUFFER, fb->rbo); + + if (glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE) +#endif // GL_DEPTH24_STENCIL8 + goto error; + } + + glBindFramebuffer(GL_FRAMEBUFFER, defaultFBO); + glBindRenderbuffer(GL_RENDERBUFFER, defaultRBO); + return fb; +error: + glBindFramebuffer(GL_FRAMEBUFFER, defaultFBO); + glBindRenderbuffer(GL_RENDERBUFFER, defaultRBO); + nvgluDeleteFramebuffer(fb); + return NULL; +#else + NVG_NOTUSED(ctx); + NVG_NOTUSED(w); + NVG_NOTUSED(h); + NVG_NOTUSED(imageFlags); + return NULL; +#endif +} + +void nvgluBindFramebuffer(NVGLUframebuffer* fb) +{ +#ifdef NANOVG_FBO_VALID + if (defaultFBO == -1) glGetIntegerv(GL_FRAMEBUFFER_BINDING, &defaultFBO); + glBindFramebuffer(GL_FRAMEBUFFER, fb != NULL ? fb->fbo : defaultFBO); +#else + NVG_NOTUSED(fb); +#endif +} + +void nvgluDeleteFramebuffer(NVGLUframebuffer* fb) +{ +#ifdef NANOVG_FBO_VALID + if (fb == NULL) return; + if (fb->fbo != 0) + glDeleteFramebuffers(1, &fb->fbo); + if (fb->rbo != 0) + glDeleteRenderbuffers(1, &fb->rbo); + if (fb->image >= 0) + nvgDeleteImage(fb->ctx, fb->image); + fb->ctx = NULL; + fb->fbo = 0; + fb->rbo = 0; + fb->texture = 0; + fb->image = -1; + free(fb); +#else + NVG_NOTUSED(fb); +#endif +} + +#endif + +#endif // NANOVG_GL_IMPLEMENTATION diff --git a/troposphere/daybreak/nanovg/include/nanovg/stb_image.h b/troposphere/daybreak/nanovg/include/nanovg/stb_image.h new file mode 100644 index 000000000..e06f7a1d7 --- /dev/null +++ b/troposphere/daybreak/nanovg/include/nanovg/stb_image.h @@ -0,0 +1,6614 @@ +/* stb_image - v2.10 - public domain image loader - http://nothings.org/stb_image.h + no warranty implied; use at your own risk + + Do this: + #define STB_IMAGE_IMPLEMENTATION + before you include this file in *one* C or C++ file to create the implementation. + + // i.e. it should look like this: + #include ... + #include ... + #include ... + #define STB_IMAGE_IMPLEMENTATION + #include "stb_image.h" + + You can #define STBI_ASSERT(x) before the #include to avoid using assert.h. + And #define STBI_MALLOC, STBI_REALLOC, and STBI_FREE to avoid using malloc,realloc,free + + + QUICK NOTES: + Primarily of interest to game developers and other people who can + avoid problematic images and only need the trivial interface + + JPEG baseline & progressive (12 bpc/arithmetic not supported, same as stock IJG lib) + PNG 1/2/4/8-bit-per-channel (16 bpc not supported) + + TGA (not sure what subset, if a subset) + BMP non-1bpp, non-RLE + PSD (composited view only, no extra channels, 8/16 bit-per-channel) + + GIF (*comp always reports as 4-channel) + HDR (radiance rgbE format) + PIC (Softimage PIC) + PNM (PPM and PGM binary only) + + Animated GIF still needs a proper API, but here's one way to do it: + http://gist.github.com/urraka/685d9a6340b26b830d49 + + - decode from memory or through FILE (define STBI_NO_STDIO to remove code) + - decode from arbitrary I/O callbacks + - SIMD acceleration on x86/x64 (SSE2) and ARM (NEON) + + Full documentation under "DOCUMENTATION" below. + + + Revision 2.00 release notes: + + - Progressive JPEG is now supported. + + - PPM and PGM binary formats are now supported, thanks to Ken Miller. + + - x86 platforms now make use of SSE2 SIMD instructions for + JPEG decoding, and ARM platforms can use NEON SIMD if requested. + This work was done by Fabian "ryg" Giesen. SSE2 is used by + default, but NEON must be enabled explicitly; see docs. + + With other JPEG optimizations included in this version, we see + 2x speedup on a JPEG on an x86 machine, and a 1.5x speedup + on a JPEG on an ARM machine, relative to previous versions of this + library. The same results will not obtain for all JPGs and for all + x86/ARM machines. (Note that progressive JPEGs are significantly + slower to decode than regular JPEGs.) This doesn't mean that this + is the fastest JPEG decoder in the land; rather, it brings it + closer to parity with standard libraries. If you want the fastest + decode, look elsewhere. (See "Philosophy" section of docs below.) + + See final bullet items below for more info on SIMD. + + - Added STBI_MALLOC, STBI_REALLOC, and STBI_FREE macros for replacing + the memory allocator. Unlike other STBI libraries, these macros don't + support a context parameter, so if you need to pass a context in to + the allocator, you'll have to store it in a global or a thread-local + variable. + + - Split existing STBI_NO_HDR flag into two flags, STBI_NO_HDR and + STBI_NO_LINEAR. + STBI_NO_HDR: suppress implementation of .hdr reader format + STBI_NO_LINEAR: suppress high-dynamic-range light-linear float API + + - You can suppress implementation of any of the decoders to reduce + your code footprint by #defining one or more of the following + symbols before creating the implementation. + + STBI_NO_JPEG + STBI_NO_PNG + STBI_NO_BMP + STBI_NO_PSD + STBI_NO_TGA + STBI_NO_GIF + STBI_NO_HDR + STBI_NO_PIC + STBI_NO_PNM (.ppm and .pgm) + + - You can request *only* certain decoders and suppress all other ones + (this will be more forward-compatible, as addition of new decoders + doesn't require you to disable them explicitly): + + STBI_ONLY_JPEG + STBI_ONLY_PNG + STBI_ONLY_BMP + STBI_ONLY_PSD + STBI_ONLY_TGA + STBI_ONLY_GIF + STBI_ONLY_HDR + STBI_ONLY_PIC + STBI_ONLY_PNM (.ppm and .pgm) + + Note that you can define multiples of these, and you will get all + of them ("only x" and "only y" is interpreted to mean "only x&y"). + + - If you use STBI_NO_PNG (or _ONLY_ without PNG), and you still + want the zlib decoder to be available, #define STBI_SUPPORT_ZLIB + + - Compilation of all SIMD code can be suppressed with + #define STBI_NO_SIMD + It should not be necessary to disable SIMD unless you have issues + compiling (e.g. using an x86 compiler which doesn't support SSE + intrinsics or that doesn't support the method used to detect + SSE2 support at run-time), and even those can be reported as + bugs so I can refine the built-in compile-time checking to be + smarter. + + - The old STBI_SIMD system which allowed installing a user-defined + IDCT etc. has been removed. If you need this, don't upgrade. My + assumption is that almost nobody was doing this, and those who + were will find the built-in SIMD more satisfactory anyway. + + - RGB values computed for JPEG images are slightly different from + previous versions of stb_image. (This is due to using less + integer precision in SIMD.) The C code has been adjusted so + that the same RGB values will be computed regardless of whether + SIMD support is available, so your app should always produce + consistent results. But these results are slightly different from + previous versions. (Specifically, about 3% of available YCbCr values + will compute different RGB results from pre-1.49 versions by +-1; + most of the deviating values are one smaller in the G channel.) + + - If you must produce consistent results with previous versions of + stb_image, #define STBI_JPEG_OLD and you will get the same results + you used to; however, you will not get the SIMD speedups for + the YCbCr-to-RGB conversion step (although you should still see + significant JPEG speedup from the other changes). + + Please note that STBI_JPEG_OLD is a temporary feature; it will be + removed in future versions of the library. It is only intended for + near-term back-compatibility use. + + + Latest revision history: + 2.10 (2016-01-22) avoid warning introduced in 2.09 + 2.09 (2016-01-16) 16-bit TGA; comments in PNM files; STBI_REALLOC_SIZED + 2.08 (2015-09-13) fix to 2.07 cleanup, reading RGB PSD as RGBA + 2.07 (2015-09-13) partial animated GIF support + limited 16-bit PSD support + minor bugs, code cleanup, and compiler warnings + 2.06 (2015-04-19) fix bug where PSD returns wrong '*comp' value + 2.05 (2015-04-19) fix bug in progressive JPEG handling, fix warning + 2.04 (2015-04-15) try to re-enable SIMD on MinGW 64-bit + 2.03 (2015-04-12) additional corruption checking + stbi_set_flip_vertically_on_load + fix NEON support; fix mingw support + 2.02 (2015-01-19) fix incorrect assert, fix warning + 2.01 (2015-01-17) fix various warnings + 2.00b (2014-12-25) fix STBI_MALLOC in progressive JPEG + 2.00 (2014-12-25) optimize JPEG, including x86 SSE2 & ARM NEON SIMD + progressive JPEG + PGM/PPM support + STBI_MALLOC,STBI_REALLOC,STBI_FREE + STBI_NO_*, STBI_ONLY_* + GIF bugfix + 1.48 (2014-12-14) fix incorrectly-named assert() + 1.47 (2014-12-14) 1/2/4-bit PNG support (both grayscale and paletted) + optimize PNG + fix bug in interlaced PNG with user-specified channel count + + See end of file for full revision history. + + + ============================ Contributors ========================= + + Image formats Extensions, features + Sean Barrett (jpeg, png, bmp) Jetro Lauha (stbi_info) + Nicolas Schulz (hdr, psd) Martin "SpartanJ" Golini (stbi_info) + Jonathan Dummer (tga) James "moose2000" Brown (iPhone PNG) + Jean-Marc Lienher (gif) Ben "Disch" Wenger (io callbacks) + Tom Seddon (pic) Omar Cornut (1/2/4-bit PNG) + Thatcher Ulrich (psd) Nicolas Guillemot (vertical flip) + Ken Miller (pgm, ppm) Richard Mitton (16-bit PSD) + urraka@github (animated gif) Junggon Kim (PNM comments) + Daniel Gibson (16-bit TGA) + + Optimizations & bugfixes + Fabian "ryg" Giesen + Arseny Kapoulkine + + Bug & warning fixes + Marc LeBlanc David Woo Guillaume George Martins Mozeiko + Christpher Lloyd Martin Golini Jerry Jansson Joseph Thomson + Dave Moore Roy Eltham Hayaki Saito Phil Jordan + Won Chun Luke Graham Johan Duparc Nathan Reed + the Horde3D community Thomas Ruf Ronny Chevalier Nick Verigakis + Janez Zemva John Bartholomew Michal Cichon svdijk@github + Jonathan Blow Ken Hamada Tero Hanninen Baldur Karlsson + Laurent Gomila Cort Stratton Sergio Gonzalez romigrou@github + Aruelien Pocheville Thibault Reuille Cass Everitt + Ryamond Barbiero Paul Du Bois Engin Manap + Blazej Dariusz Roszkowski + Michaelangel007@github + + +LICENSE + +This software is in the public domain. Where that dedication is not +recognized, you are granted a perpetual, irrevocable license to copy, +distribute, and modify this file as you see fit. + +*/ + +#ifndef STBI_INCLUDE_STB_IMAGE_H +#define STBI_INCLUDE_STB_IMAGE_H + +// DOCUMENTATION +// +// Limitations: +// - no 16-bit-per-channel PNG +// - no 12-bit-per-channel JPEG +// - no JPEGs with arithmetic coding +// - no 1-bit BMP +// - GIF always returns *comp=4 +// +// Basic usage (see HDR discussion below for HDR usage): +// int x,y,n; +// unsigned char *data = stbi_load(filename, &x, &y, &n, 0); +// // ... process data if not NULL ... +// // ... x = width, y = height, n = # 8-bit components per pixel ... +// // ... replace '0' with '1'..'4' to force that many components per pixel +// // ... but 'n' will always be the number that it would have been if you said 0 +// stbi_image_free(data) +// +// Standard parameters: +// int *x -- outputs image width in pixels +// int *y -- outputs image height in pixels +// int *comp -- outputs # of image components in image file +// int req_comp -- if non-zero, # of image components requested in result +// +// The return value from an image loader is an 'unsigned char *' which points +// to the pixel data, or NULL on an allocation failure or if the image is +// corrupt or invalid. The pixel data consists of *y scanlines of *x pixels, +// with each pixel consisting of N interleaved 8-bit components; the first +// pixel pointed to is top-left-most in the image. There is no padding between +// image scanlines or between pixels, regardless of format. The number of +// components N is 'req_comp' if req_comp is non-zero, or *comp otherwise. +// If req_comp is non-zero, *comp has the number of components that _would_ +// have been output otherwise. E.g. if you set req_comp to 4, you will always +// get RGBA output, but you can check *comp to see if it's trivially opaque +// because e.g. there were only 3 channels in the source image. +// +// An output image with N components has the following components interleaved +// in this order in each pixel: +// +// N=#comp components +// 1 grey +// 2 grey, alpha +// 3 red, green, blue +// 4 red, green, blue, alpha +// +// If image loading fails for any reason, the return value will be NULL, +// and *x, *y, *comp will be unchanged. The function stbi_failure_reason() +// can be queried for an extremely brief, end-user unfriendly explanation +// of why the load failed. Define STBI_NO_FAILURE_STRINGS to avoid +// compiling these strings at all, and STBI_FAILURE_USERMSG to get slightly +// more user-friendly ones. +// +// Paletted PNG, BMP, GIF, and PIC images are automatically depalettized. +// +// =========================================================================== +// +// Philosophy +// +// stb libraries are designed with the following priorities: +// +// 1. easy to use +// 2. easy to maintain +// 3. good performance +// +// Sometimes I let "good performance" creep up in priority over "easy to maintain", +// and for best performance I may provide less-easy-to-use APIs that give higher +// performance, in addition to the easy to use ones. Nevertheless, it's important +// to keep in mind that from the standpoint of you, a client of this library, +// all you care about is #1 and #3, and stb libraries do not emphasize #3 above all. +// +// Some secondary priorities arise directly from the first two, some of which +// make more explicit reasons why performance can't be emphasized. +// +// - Portable ("ease of use") +// - Small footprint ("easy to maintain") +// - No dependencies ("ease of use") +// +// =========================================================================== +// +// I/O callbacks +// +// I/O callbacks allow you to read from arbitrary sources, like packaged +// files or some other source. Data read from callbacks are processed +// through a small internal buffer (currently 128 bytes) to try to reduce +// overhead. +// +// The three functions you must define are "read" (reads some bytes of data), +// "skip" (skips some bytes of data), "eof" (reports if the stream is at the end). +// +// =========================================================================== +// +// SIMD support +// +// The JPEG decoder will try to automatically use SIMD kernels on x86 when +// supported by the compiler. For ARM Neon support, you must explicitly +// request it. +// +// (The old do-it-yourself SIMD API is no longer supported in the current +// code.) +// +// On x86, SSE2 will automatically be used when available based on a run-time +// test; if not, the generic C versions are used as a fall-back. On ARM targets, +// the typical path is to have separate builds for NEON and non-NEON devices +// (at least this is true for iOS and Android). Therefore, the NEON support is +// toggled by a build flag: define STBI_NEON to get NEON loops. +// +// The output of the JPEG decoder is slightly different from versions where +// SIMD support was introduced (that is, for versions before 1.49). The +// difference is only +-1 in the 8-bit RGB channels, and only on a small +// fraction of pixels. You can force the pre-1.49 behavior by defining +// STBI_JPEG_OLD, but this will disable some of the SIMD decoding path +// and hence cost some performance. +// +// If for some reason you do not want to use any of SIMD code, or if +// you have issues compiling it, you can disable it entirely by +// defining STBI_NO_SIMD. +// +// =========================================================================== +// +// HDR image support (disable by defining STBI_NO_HDR) +// +// stb_image now supports loading HDR images in general, and currently +// the Radiance .HDR file format, although the support is provided +// generically. You can still load any file through the existing interface; +// if you attempt to load an HDR file, it will be automatically remapped to +// LDR, assuming gamma 2.2 and an arbitrary scale factor defaulting to 1; +// both of these constants can be reconfigured through this interface: +// +// stbi_hdr_to_ldr_gamma(2.2f); +// stbi_hdr_to_ldr_scale(1.0f); +// +// (note, do not use _inverse_ constants; stbi_image will invert them +// appropriately). +// +// Additionally, there is a new, parallel interface for loading files as +// (linear) floats to preserve the full dynamic range: +// +// float *data = stbi_loadf(filename, &x, &y, &n, 0); +// +// If you load LDR images through this interface, those images will +// be promoted to floating point values, run through the inverse of +// constants corresponding to the above: +// +// stbi_ldr_to_hdr_scale(1.0f); +// stbi_ldr_to_hdr_gamma(2.2f); +// +// Finally, given a filename (or an open file or memory block--see header +// file for details) containing image data, you can query for the "most +// appropriate" interface to use (that is, whether the image is HDR or +// not), using: +// +// stbi_is_hdr(char *filename); +// +// =========================================================================== +// +// iPhone PNG support: +// +// By default we convert iphone-formatted PNGs back to RGB, even though +// they are internally encoded differently. You can disable this conversion +// by by calling stbi_convert_iphone_png_to_rgb(0), in which case +// you will always just get the native iphone "format" through (which +// is BGR stored in RGB). +// +// Call stbi_set_unpremultiply_on_load(1) as well to force a divide per +// pixel to remove any premultiplied alpha *only* if the image file explicitly +// says there's premultiplied data (currently only happens in iPhone images, +// and only if iPhone convert-to-rgb processing is on). +// + + +#ifndef STBI_NO_STDIO +#include +#endif // STBI_NO_STDIO + +#define STBI_VERSION 1 + +enum +{ + STBI_default = 0, // only used for req_comp + + STBI_grey = 1, + STBI_grey_alpha = 2, + STBI_rgb = 3, + STBI_rgb_alpha = 4 +}; + +typedef unsigned char stbi_uc; + +#ifdef __cplusplus +extern "C" { +#endif + +#ifdef STB_IMAGE_STATIC +#define STBIDEF static +#else +#define STBIDEF extern +#endif + +////////////////////////////////////////////////////////////////////////////// +// +// PRIMARY API - works on images of any type +// + +// +// load image by filename, open file, or memory buffer +// + +typedef struct +{ + int (*read) (void *user,char *data,int size); // fill 'data' with 'size' bytes. return number of bytes actually read + void (*skip) (void *user,int n); // skip the next 'n' bytes, or 'unget' the last -n bytes if negative + int (*eof) (void *user); // returns nonzero if we are at end of file/data +} stbi_io_callbacks; + +STBIDEF stbi_uc *stbi_load (char const *filename, int *x, int *y, int *comp, int req_comp); +STBIDEF stbi_uc *stbi_load_from_memory (stbi_uc const *buffer, int len , int *x, int *y, int *comp, int req_comp); +STBIDEF stbi_uc *stbi_load_from_callbacks(stbi_io_callbacks const *clbk , void *user, int *x, int *y, int *comp, int req_comp); + +#ifndef STBI_NO_STDIO +STBIDEF stbi_uc *stbi_load_from_file (FILE *f, int *x, int *y, int *comp, int req_comp); +// for stbi_load_from_file, file pointer is left pointing immediately after image +#endif + +#ifndef STBI_NO_LINEAR + STBIDEF float *stbi_loadf (char const *filename, int *x, int *y, int *comp, int req_comp); + STBIDEF float *stbi_loadf_from_memory (stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp); + STBIDEF float *stbi_loadf_from_callbacks (stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp); + + #ifndef STBI_NO_STDIO + STBIDEF float *stbi_loadf_from_file (FILE *f, int *x, int *y, int *comp, int req_comp); + #endif +#endif + +#ifndef STBI_NO_HDR + STBIDEF void stbi_hdr_to_ldr_gamma(float gamma); + STBIDEF void stbi_hdr_to_ldr_scale(float scale); +#endif // STBI_NO_HDR + +#ifndef STBI_NO_LINEAR + STBIDEF void stbi_ldr_to_hdr_gamma(float gamma); + STBIDEF void stbi_ldr_to_hdr_scale(float scale); +#endif // STBI_NO_LINEAR + +// stbi_is_hdr is always defined, but always returns false if STBI_NO_HDR +STBIDEF int stbi_is_hdr_from_callbacks(stbi_io_callbacks const *clbk, void *user); +STBIDEF int stbi_is_hdr_from_memory(stbi_uc const *buffer, int len); +#ifndef STBI_NO_STDIO +STBIDEF int stbi_is_hdr (char const *filename); +STBIDEF int stbi_is_hdr_from_file(FILE *f); +#endif // STBI_NO_STDIO + + +// get a VERY brief reason for failure +// NOT THREADSAFE +STBIDEF const char *stbi_failure_reason (void); + +// free the loaded image -- this is just free() +STBIDEF void stbi_image_free (void *retval_from_stbi_load); + +// get image dimensions & components without fully decoding +STBIDEF int stbi_info_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp); +STBIDEF int stbi_info_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp); + +#ifndef STBI_NO_STDIO +STBIDEF int stbi_info (char const *filename, int *x, int *y, int *comp); +STBIDEF int stbi_info_from_file (FILE *f, int *x, int *y, int *comp); + +#endif + + + +// for image formats that explicitly notate that they have premultiplied alpha, +// we just return the colors as stored in the file. set this flag to force +// unpremultiplication. results are undefined if the unpremultiply overflow. +STBIDEF void stbi_set_unpremultiply_on_load(int flag_true_if_should_unpremultiply); + +// indicate whether we should process iphone images back to canonical format, +// or just pass them through "as-is" +STBIDEF void stbi_convert_iphone_png_to_rgb(int flag_true_if_should_convert); + +// flip the image vertically, so the first pixel in the output array is the bottom left +STBIDEF void stbi_set_flip_vertically_on_load(int flag_true_if_should_flip); + +// ZLIB client - used by PNG, available for other purposes + +STBIDEF char *stbi_zlib_decode_malloc_guesssize(const char *buffer, int len, int initial_size, int *outlen); +STBIDEF char *stbi_zlib_decode_malloc_guesssize_headerflag(const char *buffer, int len, int initial_size, int *outlen, int parse_header); +STBIDEF char *stbi_zlib_decode_malloc(const char *buffer, int len, int *outlen); +STBIDEF int stbi_zlib_decode_buffer(char *obuffer, int olen, const char *ibuffer, int ilen); + +STBIDEF char *stbi_zlib_decode_noheader_malloc(const char *buffer, int len, int *outlen); +STBIDEF int stbi_zlib_decode_noheader_buffer(char *obuffer, int olen, const char *ibuffer, int ilen); + + +#ifdef __cplusplus +} +#endif + +// +// +//// end header file ///////////////////////////////////////////////////// +#endif // STBI_INCLUDE_STB_IMAGE_H + +#ifdef STB_IMAGE_IMPLEMENTATION + +#if defined(STBI_ONLY_JPEG) || defined(STBI_ONLY_PNG) || defined(STBI_ONLY_BMP) \ + || defined(STBI_ONLY_TGA) || defined(STBI_ONLY_GIF) || defined(STBI_ONLY_PSD) \ + || defined(STBI_ONLY_HDR) || defined(STBI_ONLY_PIC) || defined(STBI_ONLY_PNM) \ + || defined(STBI_ONLY_ZLIB) + #ifndef STBI_ONLY_JPEG + #define STBI_NO_JPEG + #endif + #ifndef STBI_ONLY_PNG + #define STBI_NO_PNG + #endif + #ifndef STBI_ONLY_BMP + #define STBI_NO_BMP + #endif + #ifndef STBI_ONLY_PSD + #define STBI_NO_PSD + #endif + #ifndef STBI_ONLY_TGA + #define STBI_NO_TGA + #endif + #ifndef STBI_ONLY_GIF + #define STBI_NO_GIF + #endif + #ifndef STBI_ONLY_HDR + #define STBI_NO_HDR + #endif + #ifndef STBI_ONLY_PIC + #define STBI_NO_PIC + #endif + #ifndef STBI_ONLY_PNM + #define STBI_NO_PNM + #endif +#endif + +#if defined(STBI_NO_PNG) && !defined(STBI_SUPPORT_ZLIB) && !defined(STBI_NO_ZLIB) +#define STBI_NO_ZLIB +#endif + + +#include +#include // ptrdiff_t on osx +#include +#include + +#if !defined(STBI_NO_LINEAR) || !defined(STBI_NO_HDR) +#include // ldexp +#endif + +#ifndef STBI_NO_STDIO +#include +#endif + +#ifndef STBI_ASSERT +#include +#define STBI_ASSERT(x) assert(x) +#endif + + +#ifndef _MSC_VER + #ifdef __cplusplus + #define stbi_inline inline + #else + #define stbi_inline + #endif +#else + #define stbi_inline __forceinline +#endif + + +#ifdef _MSC_VER +typedef unsigned short stbi__uint16; +typedef signed short stbi__int16; +typedef unsigned int stbi__uint32; +typedef signed int stbi__int32; +#else +#include +typedef uint16_t stbi__uint16; +typedef int16_t stbi__int16; +typedef uint32_t stbi__uint32; +typedef int32_t stbi__int32; +#endif + +// should produce compiler error if size is wrong +typedef unsigned char validate_uint32[sizeof(stbi__uint32)==4 ? 1 : -1]; + +#ifdef _MSC_VER +#define STBI_NOTUSED(v) (void)(v) +#else +#define STBI_NOTUSED(v) (void)sizeof(v) +#endif + +#ifdef _MSC_VER +#define STBI_HAS_LROTL +#endif + +#ifdef STBI_HAS_LROTL + #define stbi_lrot(x,y) _lrotl(x,y) +#else + #define stbi_lrot(x,y) (((x) << (y)) | ((x) >> (32 - (y)))) +#endif + +#if defined(STBI_MALLOC) && defined(STBI_FREE) && (defined(STBI_REALLOC) || defined(STBI_REALLOC_SIZED)) +// ok +#elif !defined(STBI_MALLOC) && !defined(STBI_FREE) && !defined(STBI_REALLOC) && !defined(STBI_REALLOC_SIZED) +// ok +#else +#error "Must define all or none of STBI_MALLOC, STBI_FREE, and STBI_REALLOC (or STBI_REALLOC_SIZED)." +#endif + +#ifndef STBI_MALLOC +#define STBI_MALLOC(sz) malloc(sz) +#define STBI_REALLOC(p,newsz) realloc(p,newsz) +#define STBI_FREE(p) free(p) +#endif + +#ifndef STBI_REALLOC_SIZED +#define STBI_REALLOC_SIZED(p,oldsz,newsz) STBI_REALLOC(p,newsz) +#endif + +// x86/x64 detection +#if defined(__x86_64__) || defined(_M_X64) +#define STBI__X64_TARGET +#elif defined(__i386) || defined(_M_IX86) +#define STBI__X86_TARGET +#endif + +#if defined(__GNUC__) && (defined(STBI__X86_TARGET) || defined(STBI__X64_TARGET)) && !defined(__SSE2__) && !defined(STBI_NO_SIMD) +// NOTE: not clear do we actually need this for the 64-bit path? +// gcc doesn't support sse2 intrinsics unless you compile with -msse2, +// (but compiling with -msse2 allows the compiler to use SSE2 everywhere; +// this is just broken and gcc are jerks for not fixing it properly +// http://www.virtualdub.org/blog/pivot/entry.php?id=363 ) +#define STBI_NO_SIMD +#endif + +#if defined(__MINGW32__) && defined(STBI__X86_TARGET) && !defined(STBI_MINGW_ENABLE_SSE2) && !defined(STBI_NO_SIMD) +// Note that __MINGW32__ doesn't actually mean 32-bit, so we have to avoid STBI__X64_TARGET +// +// 32-bit MinGW wants ESP to be 16-byte aligned, but this is not in the +// Windows ABI and VC++ as well as Windows DLLs don't maintain that invariant. +// As a result, enabling SSE2 on 32-bit MinGW is dangerous when not +// simultaneously enabling "-mstackrealign". +// +// See https://github.com/nothings/stb/issues/81 for more information. +// +// So default to no SSE2 on 32-bit MinGW. If you've read this far and added +// -mstackrealign to your build settings, feel free to #define STBI_MINGW_ENABLE_SSE2. +#define STBI_NO_SIMD +#endif + +#if !defined(STBI_NO_SIMD) && defined(STBI__X86_TARGET) +#define STBI_SSE2 +#include + +#ifdef _MSC_VER + +#if _MSC_VER >= 1400 // not VC6 +#include // __cpuid +static int stbi__cpuid3(void) +{ + int info[4]; + __cpuid(info,1); + return info[3]; +} +#else +static int stbi__cpuid3(void) +{ + int res; + __asm { + mov eax,1 + cpuid + mov res,edx + } + return res; +} +#endif + +#define STBI_SIMD_ALIGN(type, name) __declspec(align(16)) type name + +static int stbi__sse2_available() +{ + int info3 = stbi__cpuid3(); + return ((info3 >> 26) & 1) != 0; +} +#else // assume GCC-style if not VC++ +#define STBI_SIMD_ALIGN(type, name) type name __attribute__((aligned(16))) + +static int stbi__sse2_available() +{ +#if defined(__GNUC__) && (__GNUC__ * 100 + __GNUC_MINOR__) >= 408 // GCC 4.8 or later + // GCC 4.8+ has a nice way to do this + return __builtin_cpu_supports("sse2"); +#else + // portable way to do this, preferably without using GCC inline ASM? + // just bail for now. + return 0; +#endif +} +#endif +#endif + +// ARM NEON +#if defined(STBI_NO_SIMD) && defined(STBI_NEON) +#undef STBI_NEON +#endif + +#ifdef STBI_NEON +#include +// assume GCC or Clang on ARM targets +#define STBI_SIMD_ALIGN(type, name) type name __attribute__((aligned(16))) +#endif + +#ifndef STBI_SIMD_ALIGN +#define STBI_SIMD_ALIGN(type, name) type name +#endif + +/////////////////////////////////////////////// +// +// stbi__context struct and start_xxx functions + +// stbi__context structure is our basic context used by all images, so it +// contains all the IO context, plus some basic image information +typedef struct +{ + stbi__uint32 img_x, img_y; + int img_n, img_out_n; + + stbi_io_callbacks io; + void *io_user_data; + + int read_from_callbacks; + int buflen; + stbi_uc buffer_start[128]; + + stbi_uc *img_buffer, *img_buffer_end; + stbi_uc *img_buffer_original, *img_buffer_original_end; +} stbi__context; + + +static void stbi__refill_buffer(stbi__context *s); + +// initialize a memory-decode context +static void stbi__start_mem(stbi__context *s, stbi_uc const *buffer, int len) +{ + s->io.read = NULL; + s->read_from_callbacks = 0; + s->img_buffer = s->img_buffer_original = (stbi_uc *) buffer; + s->img_buffer_end = s->img_buffer_original_end = (stbi_uc *) buffer+len; +} + +// initialize a callback-based context +static void stbi__start_callbacks(stbi__context *s, stbi_io_callbacks *c, void *user) +{ + s->io = *c; + s->io_user_data = user; + s->buflen = sizeof(s->buffer_start); + s->read_from_callbacks = 1; + s->img_buffer_original = s->buffer_start; + stbi__refill_buffer(s); + s->img_buffer_original_end = s->img_buffer_end; +} + +#ifndef STBI_NO_STDIO + +static int stbi__stdio_read(void *user, char *data, int size) +{ + return (int) fread(data,1,size,(FILE*) user); +} + +static void stbi__stdio_skip(void *user, int n) +{ + fseek((FILE*) user, n, SEEK_CUR); +} + +static int stbi__stdio_eof(void *user) +{ + return feof((FILE*) user); +} + +static stbi_io_callbacks stbi__stdio_callbacks = +{ + stbi__stdio_read, + stbi__stdio_skip, + stbi__stdio_eof, +}; + +static void stbi__start_file(stbi__context *s, FILE *f) +{ + stbi__start_callbacks(s, &stbi__stdio_callbacks, (void *) f); +} + +//static void stop_file(stbi__context *s) { } + +#endif // !STBI_NO_STDIO + +static void stbi__rewind(stbi__context *s) +{ + // conceptually rewind SHOULD rewind to the beginning of the stream, + // but we just rewind to the beginning of the initial buffer, because + // we only use it after doing 'test', which only ever looks at at most 92 bytes + s->img_buffer = s->img_buffer_original; + s->img_buffer_end = s->img_buffer_original_end; +} + +#ifndef STBI_NO_JPEG +static int stbi__jpeg_test(stbi__context *s); +static stbi_uc *stbi__jpeg_load(stbi__context *s, int *x, int *y, int *comp, int req_comp); +static int stbi__jpeg_info(stbi__context *s, int *x, int *y, int *comp); +#endif + +#ifndef STBI_NO_PNG +static int stbi__png_test(stbi__context *s); +static stbi_uc *stbi__png_load(stbi__context *s, int *x, int *y, int *comp, int req_comp); +static int stbi__png_info(stbi__context *s, int *x, int *y, int *comp); +#endif + +#ifndef STBI_NO_BMP +static int stbi__bmp_test(stbi__context *s); +static stbi_uc *stbi__bmp_load(stbi__context *s, int *x, int *y, int *comp, int req_comp); +static int stbi__bmp_info(stbi__context *s, int *x, int *y, int *comp); +#endif + +#ifndef STBI_NO_TGA +static int stbi__tga_test(stbi__context *s); +static stbi_uc *stbi__tga_load(stbi__context *s, int *x, int *y, int *comp, int req_comp); +static int stbi__tga_info(stbi__context *s, int *x, int *y, int *comp); +#endif + +#ifndef STBI_NO_PSD +static int stbi__psd_test(stbi__context *s); +static stbi_uc *stbi__psd_load(stbi__context *s, int *x, int *y, int *comp, int req_comp); +static int stbi__psd_info(stbi__context *s, int *x, int *y, int *comp); +#endif + +#ifndef STBI_NO_HDR +static int stbi__hdr_test(stbi__context *s); +static float *stbi__hdr_load(stbi__context *s, int *x, int *y, int *comp, int req_comp); +static int stbi__hdr_info(stbi__context *s, int *x, int *y, int *comp); +#endif + +#ifndef STBI_NO_PIC +static int stbi__pic_test(stbi__context *s); +static stbi_uc *stbi__pic_load(stbi__context *s, int *x, int *y, int *comp, int req_comp); +static int stbi__pic_info(stbi__context *s, int *x, int *y, int *comp); +#endif + +#ifndef STBI_NO_GIF +static int stbi__gif_test(stbi__context *s); +static stbi_uc *stbi__gif_load(stbi__context *s, int *x, int *y, int *comp, int req_comp); +static int stbi__gif_info(stbi__context *s, int *x, int *y, int *comp); +#endif + +#ifndef STBI_NO_PNM +static int stbi__pnm_test(stbi__context *s); +static stbi_uc *stbi__pnm_load(stbi__context *s, int *x, int *y, int *comp, int req_comp); +static int stbi__pnm_info(stbi__context *s, int *x, int *y, int *comp); +#endif + +// this is not threadsafe +static const char *stbi__g_failure_reason; + +STBIDEF const char *stbi_failure_reason(void) +{ + return stbi__g_failure_reason; +} + +static int stbi__err(const char *str) +{ + stbi__g_failure_reason = str; + return 0; +} + +static void *stbi__malloc(size_t size) +{ + return STBI_MALLOC(size); +} + +// stbi__err - error +// stbi__errpf - error returning pointer to float +// stbi__errpuc - error returning pointer to unsigned char + +#ifdef STBI_NO_FAILURE_STRINGS + #define stbi__err(x,y) 0 +#elif defined(STBI_FAILURE_USERMSG) + #define stbi__err(x,y) stbi__err(y) +#else + #define stbi__err(x,y) stbi__err(x) +#endif + +#define stbi__errpf(x,y) ((float *)(size_t) (stbi__err(x,y)?NULL:NULL)) +#define stbi__errpuc(x,y) ((unsigned char *)(size_t) (stbi__err(x,y)?NULL:NULL)) + +STBIDEF void stbi_image_free(void *retval_from_stbi_load) +{ + STBI_FREE(retval_from_stbi_load); +} + +#ifndef STBI_NO_LINEAR +static float *stbi__ldr_to_hdr(stbi_uc *data, int x, int y, int comp); +#endif + +#ifndef STBI_NO_HDR +static stbi_uc *stbi__hdr_to_ldr(float *data, int x, int y, int comp); +#endif + +static int stbi__vertically_flip_on_load = 0; + +STBIDEF void stbi_set_flip_vertically_on_load(int flag_true_if_should_flip) +{ + stbi__vertically_flip_on_load = flag_true_if_should_flip; +} + +static unsigned char *stbi__load_main(stbi__context *s, int *x, int *y, int *comp, int req_comp) +{ + #ifndef STBI_NO_JPEG + if (stbi__jpeg_test(s)) return stbi__jpeg_load(s,x,y,comp,req_comp); + #endif + #ifndef STBI_NO_PNG + if (stbi__png_test(s)) return stbi__png_load(s,x,y,comp,req_comp); + #endif + #ifndef STBI_NO_BMP + if (stbi__bmp_test(s)) return stbi__bmp_load(s,x,y,comp,req_comp); + #endif + #ifndef STBI_NO_GIF + if (stbi__gif_test(s)) return stbi__gif_load(s,x,y,comp,req_comp); + #endif + #ifndef STBI_NO_PSD + if (stbi__psd_test(s)) return stbi__psd_load(s,x,y,comp,req_comp); + #endif + #ifndef STBI_NO_PIC + if (stbi__pic_test(s)) return stbi__pic_load(s,x,y,comp,req_comp); + #endif + #ifndef STBI_NO_PNM + if (stbi__pnm_test(s)) return stbi__pnm_load(s,x,y,comp,req_comp); + #endif + + #ifndef STBI_NO_HDR + if (stbi__hdr_test(s)) { + float *hdr = stbi__hdr_load(s, x,y,comp,req_comp); + return stbi__hdr_to_ldr(hdr, *x, *y, req_comp ? req_comp : *comp); + } + #endif + + #ifndef STBI_NO_TGA + // test tga last because it's a crappy test! + if (stbi__tga_test(s)) + return stbi__tga_load(s,x,y,comp,req_comp); + #endif + + return stbi__errpuc("unknown image type", "Image not of any known type, or corrupt"); +} + +static unsigned char *stbi__load_flip(stbi__context *s, int *x, int *y, int *comp, int req_comp) +{ + unsigned char *result = stbi__load_main(s, x, y, comp, req_comp); + + if (stbi__vertically_flip_on_load && result != NULL) { + int w = *x, h = *y; + int depth = req_comp ? req_comp : *comp; + int row,col,z; + stbi_uc temp; + + // @OPTIMIZE: use a bigger temp buffer and memcpy multiple pixels at once + for (row = 0; row < (h>>1); row++) { + for (col = 0; col < w; col++) { + for (z = 0; z < depth; z++) { + temp = result[(row * w + col) * depth + z]; + result[(row * w + col) * depth + z] = result[((h - row - 1) * w + col) * depth + z]; + result[((h - row - 1) * w + col) * depth + z] = temp; + } + } + } + } + + return result; +} + +#ifndef STBI_NO_HDR +static void stbi__float_postprocess(float *result, int *x, int *y, int *comp, int req_comp) +{ + if (stbi__vertically_flip_on_load && result != NULL) { + int w = *x, h = *y; + int depth = req_comp ? req_comp : *comp; + int row,col,z; + float temp; + + // @OPTIMIZE: use a bigger temp buffer and memcpy multiple pixels at once + for (row = 0; row < (h>>1); row++) { + for (col = 0; col < w; col++) { + for (z = 0; z < depth; z++) { + temp = result[(row * w + col) * depth + z]; + result[(row * w + col) * depth + z] = result[((h - row - 1) * w + col) * depth + z]; + result[((h - row - 1) * w + col) * depth + z] = temp; + } + } + } + } +} +#endif + +#ifndef STBI_NO_STDIO + +static FILE *stbi__fopen(char const *filename, char const *mode) +{ + FILE *f; +#if defined(_MSC_VER) && _MSC_VER >= 1400 + if (0 != fopen_s(&f, filename, mode)) + f=0; +#else + f = fopen(filename, mode); +#endif + return f; +} + + +STBIDEF stbi_uc *stbi_load(char const *filename, int *x, int *y, int *comp, int req_comp) +{ + FILE *f = stbi__fopen(filename, "rb"); + unsigned char *result; + if (!f) return stbi__errpuc("can't fopen", "Unable to open file"); + result = stbi_load_from_file(f,x,y,comp,req_comp); + fclose(f); + return result; +} + +STBIDEF stbi_uc *stbi_load_from_file(FILE *f, int *x, int *y, int *comp, int req_comp) +{ + unsigned char *result; + stbi__context s; + stbi__start_file(&s,f); + result = stbi__load_flip(&s,x,y,comp,req_comp); + if (result) { + // need to 'unget' all the characters in the IO buffer + fseek(f, - (int) (s.img_buffer_end - s.img_buffer), SEEK_CUR); + } + return result; +} +#endif //!STBI_NO_STDIO + +STBIDEF stbi_uc *stbi_load_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp) +{ + stbi__context s; + stbi__start_mem(&s,buffer,len); + return stbi__load_flip(&s,x,y,comp,req_comp); +} + +STBIDEF stbi_uc *stbi_load_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp) +{ + stbi__context s; + stbi__start_callbacks(&s, (stbi_io_callbacks *) clbk, user); + return stbi__load_flip(&s,x,y,comp,req_comp); +} + +#ifndef STBI_NO_LINEAR +static float *stbi__loadf_main(stbi__context *s, int *x, int *y, int *comp, int req_comp) +{ + unsigned char *data; + #ifndef STBI_NO_HDR + if (stbi__hdr_test(s)) { + float *hdr_data = stbi__hdr_load(s,x,y,comp,req_comp); + if (hdr_data) + stbi__float_postprocess(hdr_data,x,y,comp,req_comp); + return hdr_data; + } + #endif + data = stbi__load_flip(s, x, y, comp, req_comp); + if (data) + return stbi__ldr_to_hdr(data, *x, *y, req_comp ? req_comp : *comp); + return stbi__errpf("unknown image type", "Image not of any known type, or corrupt"); +} + +STBIDEF float *stbi_loadf_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp) +{ + stbi__context s; + stbi__start_mem(&s,buffer,len); + return stbi__loadf_main(&s,x,y,comp,req_comp); +} + +STBIDEF float *stbi_loadf_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp) +{ + stbi__context s; + stbi__start_callbacks(&s, (stbi_io_callbacks *) clbk, user); + return stbi__loadf_main(&s,x,y,comp,req_comp); +} + +#ifndef STBI_NO_STDIO +STBIDEF float *stbi_loadf(char const *filename, int *x, int *y, int *comp, int req_comp) +{ + float *result; + FILE *f = stbi__fopen(filename, "rb"); + if (!f) return stbi__errpf("can't fopen", "Unable to open file"); + result = stbi_loadf_from_file(f,x,y,comp,req_comp); + fclose(f); + return result; +} + +STBIDEF float *stbi_loadf_from_file(FILE *f, int *x, int *y, int *comp, int req_comp) +{ + stbi__context s; + stbi__start_file(&s,f); + return stbi__loadf_main(&s,x,y,comp,req_comp); +} +#endif // !STBI_NO_STDIO + +#endif // !STBI_NO_LINEAR + +// these is-hdr-or-not is defined independent of whether STBI_NO_LINEAR is +// defined, for API simplicity; if STBI_NO_LINEAR is defined, it always +// reports false! + +STBIDEF int stbi_is_hdr_from_memory(stbi_uc const *buffer, int len) +{ + #ifndef STBI_NO_HDR + stbi__context s; + stbi__start_mem(&s,buffer,len); + return stbi__hdr_test(&s); + #else + STBI_NOTUSED(buffer); + STBI_NOTUSED(len); + return 0; + #endif +} + +#ifndef STBI_NO_STDIO +STBIDEF int stbi_is_hdr (char const *filename) +{ + FILE *f = stbi__fopen(filename, "rb"); + int result=0; + if (f) { + result = stbi_is_hdr_from_file(f); + fclose(f); + } + return result; +} + +STBIDEF int stbi_is_hdr_from_file(FILE *f) +{ + #ifndef STBI_NO_HDR + stbi__context s; + stbi__start_file(&s,f); + return stbi__hdr_test(&s); + #else + STBI_NOTUSED(f); + return 0; + #endif +} +#endif // !STBI_NO_STDIO + +STBIDEF int stbi_is_hdr_from_callbacks(stbi_io_callbacks const *clbk, void *user) +{ + #ifndef STBI_NO_HDR + stbi__context s; + stbi__start_callbacks(&s, (stbi_io_callbacks *) clbk, user); + return stbi__hdr_test(&s); + #else + STBI_NOTUSED(clbk); + STBI_NOTUSED(user); + return 0; + #endif +} + +#ifndef STBI_NO_LINEAR +static float stbi__l2h_gamma=2.2f, stbi__l2h_scale=1.0f; + +STBIDEF void stbi_ldr_to_hdr_gamma(float gamma) { stbi__l2h_gamma = gamma; } +STBIDEF void stbi_ldr_to_hdr_scale(float scale) { stbi__l2h_scale = scale; } +#endif + +static float stbi__h2l_gamma_i=1.0f/2.2f, stbi__h2l_scale_i=1.0f; + +STBIDEF void stbi_hdr_to_ldr_gamma(float gamma) { stbi__h2l_gamma_i = 1/gamma; } +STBIDEF void stbi_hdr_to_ldr_scale(float scale) { stbi__h2l_scale_i = 1/scale; } + + +////////////////////////////////////////////////////////////////////////////// +// +// Common code used by all image loaders +// + +enum +{ + STBI__SCAN_load=0, + STBI__SCAN_type, + STBI__SCAN_header +}; + +static void stbi__refill_buffer(stbi__context *s) +{ + int n = (s->io.read)(s->io_user_data,(char*)s->buffer_start,s->buflen); + if (n == 0) { + // at end of file, treat same as if from memory, but need to handle case + // where s->img_buffer isn't pointing to safe memory, e.g. 0-byte file + s->read_from_callbacks = 0; + s->img_buffer = s->buffer_start; + s->img_buffer_end = s->buffer_start+1; + *s->img_buffer = 0; + } else { + s->img_buffer = s->buffer_start; + s->img_buffer_end = s->buffer_start + n; + } +} + +stbi_inline static stbi_uc stbi__get8(stbi__context *s) +{ + if (s->img_buffer < s->img_buffer_end) + return *s->img_buffer++; + if (s->read_from_callbacks) { + stbi__refill_buffer(s); + return *s->img_buffer++; + } + return 0; +} + +stbi_inline static int stbi__at_eof(stbi__context *s) +{ + if (s->io.read) { + if (!(s->io.eof)(s->io_user_data)) return 0; + // if feof() is true, check if buffer = end + // special case: we've only got the special 0 character at the end + if (s->read_from_callbacks == 0) return 1; + } + + return s->img_buffer >= s->img_buffer_end; +} + +static void stbi__skip(stbi__context *s, int n) +{ + if (n < 0) { + s->img_buffer = s->img_buffer_end; + return; + } + if (s->io.read) { + int blen = (int) (s->img_buffer_end - s->img_buffer); + if (blen < n) { + s->img_buffer = s->img_buffer_end; + (s->io.skip)(s->io_user_data, n - blen); + return; + } + } + s->img_buffer += n; +} + +static int stbi__getn(stbi__context *s, stbi_uc *buffer, int n) +{ + if (s->io.read) { + int blen = (int) (s->img_buffer_end - s->img_buffer); + if (blen < n) { + int res, count; + + memcpy(buffer, s->img_buffer, blen); + + count = (s->io.read)(s->io_user_data, (char*) buffer + blen, n - blen); + res = (count == (n-blen)); + s->img_buffer = s->img_buffer_end; + return res; + } + } + + if (s->img_buffer+n <= s->img_buffer_end) { + memcpy(buffer, s->img_buffer, n); + s->img_buffer += n; + return 1; + } else + return 0; +} + +static int stbi__get16be(stbi__context *s) +{ + int z = stbi__get8(s); + return (z << 8) + stbi__get8(s); +} + +static stbi__uint32 stbi__get32be(stbi__context *s) +{ + stbi__uint32 z = stbi__get16be(s); + return (z << 16) + stbi__get16be(s); +} + +#if defined(STBI_NO_BMP) && defined(STBI_NO_TGA) && defined(STBI_NO_GIF) +// nothing +#else +static int stbi__get16le(stbi__context *s) +{ + int z = stbi__get8(s); + return z + (stbi__get8(s) << 8); +} +#endif + +#ifndef STBI_NO_BMP +static stbi__uint32 stbi__get32le(stbi__context *s) +{ + stbi__uint32 z = stbi__get16le(s); + return z + (stbi__get16le(s) << 16); +} +#endif + +#define STBI__BYTECAST(x) ((stbi_uc) ((x) & 255)) // truncate int to byte without warnings + + +////////////////////////////////////////////////////////////////////////////// +// +// generic converter from built-in img_n to req_comp +// individual types do this automatically as much as possible (e.g. jpeg +// does all cases internally since it needs to colorspace convert anyway, +// and it never has alpha, so very few cases ). png can automatically +// interleave an alpha=255 channel, but falls back to this for other cases +// +// assume data buffer is malloced, so malloc a new one and free that one +// only failure mode is malloc failing + +static stbi_uc stbi__compute_y(int r, int g, int b) +{ + return (stbi_uc) (((r*77) + (g*150) + (29*b)) >> 8); +} + +static unsigned char *stbi__convert_format(unsigned char *data, int img_n, int req_comp, unsigned int x, unsigned int y) +{ + int i,j; + unsigned char *good; + + if (req_comp == img_n) return data; + STBI_ASSERT(req_comp >= 1 && req_comp <= 4); + + good = (unsigned char *) stbi__malloc(req_comp * x * y); + if (good == NULL) { + STBI_FREE(data); + return stbi__errpuc("outofmem", "Out of memory"); + } + + for (j=0; j < (int) y; ++j) { + unsigned char *src = data + j * x * img_n ; + unsigned char *dest = good + j * x * req_comp; + + #define COMBO(a,b) ((a)*8+(b)) + #define CASE(a,b) case COMBO(a,b): for(i=x-1; i >= 0; --i, src += a, dest += b) + // convert source image with img_n components to one with req_comp components; + // avoid switch per pixel, so use switch per scanline and massive macros + switch (COMBO(img_n, req_comp)) { + CASE(1,2) dest[0]=src[0], dest[1]=255; break; + CASE(1,3) dest[0]=dest[1]=dest[2]=src[0]; break; + CASE(1,4) dest[0]=dest[1]=dest[2]=src[0], dest[3]=255; break; + CASE(2,1) dest[0]=src[0]; break; + CASE(2,3) dest[0]=dest[1]=dest[2]=src[0]; break; + CASE(2,4) dest[0]=dest[1]=dest[2]=src[0], dest[3]=src[1]; break; + CASE(3,4) dest[0]=src[0],dest[1]=src[1],dest[2]=src[2],dest[3]=255; break; + CASE(3,1) dest[0]=stbi__compute_y(src[0],src[1],src[2]); break; + CASE(3,2) dest[0]=stbi__compute_y(src[0],src[1],src[2]), dest[1] = 255; break; + CASE(4,1) dest[0]=stbi__compute_y(src[0],src[1],src[2]); break; + CASE(4,2) dest[0]=stbi__compute_y(src[0],src[1],src[2]), dest[1] = src[3]; break; + CASE(4,3) dest[0]=src[0],dest[1]=src[1],dest[2]=src[2]; break; + default: STBI_ASSERT(0); + } + #undef CASE + } + + STBI_FREE(data); + return good; +} + +#ifndef STBI_NO_LINEAR +static float *stbi__ldr_to_hdr(stbi_uc *data, int x, int y, int comp) +{ + int i,k,n; + float *output = (float *) stbi__malloc(x * y * comp * sizeof(float)); + if (output == NULL) { STBI_FREE(data); return stbi__errpf("outofmem", "Out of memory"); } + // compute number of non-alpha components + if (comp & 1) n = comp; else n = comp-1; + for (i=0; i < x*y; ++i) { + for (k=0; k < n; ++k) { + output[i*comp + k] = (float) (pow(data[i*comp+k]/255.0f, stbi__l2h_gamma) * stbi__l2h_scale); + } + if (k < comp) output[i*comp + k] = data[i*comp+k]/255.0f; + } + STBI_FREE(data); + return output; +} +#endif + +#ifndef STBI_NO_HDR +#define stbi__float2int(x) ((int) (x)) +static stbi_uc *stbi__hdr_to_ldr(float *data, int x, int y, int comp) +{ + int i,k,n; + stbi_uc *output = (stbi_uc *) stbi__malloc(x * y * comp); + if (output == NULL) { STBI_FREE(data); return stbi__errpuc("outofmem", "Out of memory"); } + // compute number of non-alpha components + if (comp & 1) n = comp; else n = comp-1; + for (i=0; i < x*y; ++i) { + for (k=0; k < n; ++k) { + float z = (float) pow(data[i*comp+k]*stbi__h2l_scale_i, stbi__h2l_gamma_i) * 255 + 0.5f; + if (z < 0) z = 0; + if (z > 255) z = 255; + output[i*comp + k] = (stbi_uc) stbi__float2int(z); + } + if (k < comp) { + float z = data[i*comp+k] * 255 + 0.5f; + if (z < 0) z = 0; + if (z > 255) z = 255; + output[i*comp + k] = (stbi_uc) stbi__float2int(z); + } + } + STBI_FREE(data); + return output; +} +#endif + +////////////////////////////////////////////////////////////////////////////// +// +// "baseline" JPEG/JFIF decoder +// +// simple implementation +// - doesn't support delayed output of y-dimension +// - simple interface (only one output format: 8-bit interleaved RGB) +// - doesn't try to recover corrupt jpegs +// - doesn't allow partial loading, loading multiple at once +// - still fast on x86 (copying globals into locals doesn't help x86) +// - allocates lots of intermediate memory (full size of all components) +// - non-interleaved case requires this anyway +// - allows good upsampling (see next) +// high-quality +// - upsampled channels are bilinearly interpolated, even across blocks +// - quality integer IDCT derived from IJG's 'slow' +// performance +// - fast huffman; reasonable integer IDCT +// - some SIMD kernels for common paths on targets with SSE2/NEON +// - uses a lot of intermediate memory, could cache poorly + +#ifndef STBI_NO_JPEG + +// huffman decoding acceleration +#define FAST_BITS 9 // larger handles more cases; smaller stomps less cache + +typedef struct +{ + stbi_uc fast[1 << FAST_BITS]; + // weirdly, repacking this into AoS is a 10% speed loss, instead of a win + stbi__uint16 code[256]; + stbi_uc values[256]; + stbi_uc size[257]; + unsigned int maxcode[18]; + int delta[17]; // old 'firstsymbol' - old 'firstcode' +} stbi__huffman; + +typedef struct +{ + stbi__context *s; + stbi__huffman huff_dc[4]; + stbi__huffman huff_ac[4]; + stbi_uc dequant[4][64]; + stbi__int16 fast_ac[4][1 << FAST_BITS]; + +// sizes for components, interleaved MCUs + int img_h_max, img_v_max; + int img_mcu_x, img_mcu_y; + int img_mcu_w, img_mcu_h; + +// definition of jpeg image component + struct + { + int id; + int h,v; + int tq; + int hd,ha; + int dc_pred; + + int x,y,w2,h2; + stbi_uc *data; + void *raw_data, *raw_coeff; + stbi_uc *linebuf; + short *coeff; // progressive only + int coeff_w, coeff_h; // number of 8x8 coefficient blocks + } img_comp[4]; + + stbi__uint32 code_buffer; // jpeg entropy-coded buffer + int code_bits; // number of valid bits + unsigned char marker; // marker seen while filling entropy buffer + int nomore; // flag if we saw a marker so must stop + + int progressive; + int spec_start; + int spec_end; + int succ_high; + int succ_low; + int eob_run; + + int scan_n, order[4]; + int restart_interval, todo; + +// kernels + void (*idct_block_kernel)(stbi_uc *out, int out_stride, short data[64]); + void (*YCbCr_to_RGB_kernel)(stbi_uc *out, const stbi_uc *y, const stbi_uc *pcb, const stbi_uc *pcr, int count, int step); + stbi_uc *(*resample_row_hv_2_kernel)(stbi_uc *out, stbi_uc *in_near, stbi_uc *in_far, int w, int hs); +} stbi__jpeg; + +static int stbi__build_huffman(stbi__huffman *h, int *count) +{ + int i,j,k=0,code; + // build size list for each symbol (from JPEG spec) + for (i=0; i < 16; ++i) + for (j=0; j < count[i]; ++j) + h->size[k++] = (stbi_uc) (i+1); + h->size[k] = 0; + + // compute actual symbols (from jpeg spec) + code = 0; + k = 0; + for(j=1; j <= 16; ++j) { + // compute delta to add to code to compute symbol id + h->delta[j] = k - code; + if (h->size[k] == j) { + while (h->size[k] == j) + h->code[k++] = (stbi__uint16) (code++); + if (code-1 >= (1 << j)) return stbi__err("bad code lengths","Corrupt JPEG"); + } + // compute largest code + 1 for this size, preshifted as needed later + h->maxcode[j] = code << (16-j); + code <<= 1; + } + h->maxcode[j] = 0xffffffff; + + // build non-spec acceleration table; 255 is flag for not-accelerated + memset(h->fast, 255, 1 << FAST_BITS); + for (i=0; i < k; ++i) { + int s = h->size[i]; + if (s <= FAST_BITS) { + int c = h->code[i] << (FAST_BITS-s); + int m = 1 << (FAST_BITS-s); + for (j=0; j < m; ++j) { + h->fast[c+j] = (stbi_uc) i; + } + } + } + return 1; +} + +// build a table that decodes both magnitude and value of small ACs in +// one go. +static void stbi__build_fast_ac(stbi__int16 *fast_ac, stbi__huffman *h) +{ + int i; + for (i=0; i < (1 << FAST_BITS); ++i) { + stbi_uc fast = h->fast[i]; + fast_ac[i] = 0; + if (fast < 255) { + int rs = h->values[fast]; + int run = (rs >> 4) & 15; + int magbits = rs & 15; + int len = h->size[fast]; + + if (magbits && len + magbits <= FAST_BITS) { + // magnitude code followed by receive_extend code + int k = ((i << len) & ((1 << FAST_BITS) - 1)) >> (FAST_BITS - magbits); + int m = 1 << (magbits - 1); + if (k < m) k += (-1 << magbits) + 1; + // if the result is small enough, we can fit it in fast_ac table + if (k >= -128 && k <= 127) + fast_ac[i] = (stbi__int16) ((k << 8) + (run << 4) + (len + magbits)); + } + } + } +} + +static void stbi__grow_buffer_unsafe(stbi__jpeg *j) +{ + do { + int b = j->nomore ? 0 : stbi__get8(j->s); + if (b == 0xff) { + int c = stbi__get8(j->s); + if (c != 0) { + j->marker = (unsigned char) c; + j->nomore = 1; + return; + } + } + j->code_buffer |= b << (24 - j->code_bits); + j->code_bits += 8; + } while (j->code_bits <= 24); +} + +// (1 << n) - 1 +static stbi__uint32 stbi__bmask[17]={0,1,3,7,15,31,63,127,255,511,1023,2047,4095,8191,16383,32767,65535}; + +// decode a jpeg huffman value from the bitstream +stbi_inline static int stbi__jpeg_huff_decode(stbi__jpeg *j, stbi__huffman *h) +{ + unsigned int temp; + int c,k; + + if (j->code_bits < 16) stbi__grow_buffer_unsafe(j); + + // look at the top FAST_BITS and determine what symbol ID it is, + // if the code is <= FAST_BITS + c = (j->code_buffer >> (32 - FAST_BITS)) & ((1 << FAST_BITS)-1); + k = h->fast[c]; + if (k < 255) { + int s = h->size[k]; + if (s > j->code_bits) + return -1; + j->code_buffer <<= s; + j->code_bits -= s; + return h->values[k]; + } + + // naive test is to shift the code_buffer down so k bits are + // valid, then test against maxcode. To speed this up, we've + // preshifted maxcode left so that it has (16-k) 0s at the + // end; in other words, regardless of the number of bits, it + // wants to be compared against something shifted to have 16; + // that way we don't need to shift inside the loop. + temp = j->code_buffer >> 16; + for (k=FAST_BITS+1 ; ; ++k) + if (temp < h->maxcode[k]) + break; + if (k == 17) { + // error! code not found + j->code_bits -= 16; + return -1; + } + + if (k > j->code_bits) + return -1; + + // convert the huffman code to the symbol id + c = ((j->code_buffer >> (32 - k)) & stbi__bmask[k]) + h->delta[k]; + STBI_ASSERT((((j->code_buffer) >> (32 - h->size[c])) & stbi__bmask[h->size[c]]) == h->code[c]); + + // convert the id to a symbol + j->code_bits -= k; + j->code_buffer <<= k; + return h->values[c]; +} + +// bias[n] = (-1<code_bits < n) stbi__grow_buffer_unsafe(j); + + sgn = (stbi__int32)j->code_buffer >> 31; // sign bit is always in MSB + k = stbi_lrot(j->code_buffer, n); + STBI_ASSERT(n >= 0 && n < (int) (sizeof(stbi__bmask)/sizeof(*stbi__bmask))); + j->code_buffer = k & ~stbi__bmask[n]; + k &= stbi__bmask[n]; + j->code_bits -= n; + return k + (stbi__jbias[n] & ~sgn); +} + +// get some unsigned bits +stbi_inline static int stbi__jpeg_get_bits(stbi__jpeg *j, int n) +{ + unsigned int k; + if (j->code_bits < n) stbi__grow_buffer_unsafe(j); + k = stbi_lrot(j->code_buffer, n); + j->code_buffer = k & ~stbi__bmask[n]; + k &= stbi__bmask[n]; + j->code_bits -= n; + return k; +} + +stbi_inline static int stbi__jpeg_get_bit(stbi__jpeg *j) +{ + unsigned int k; + if (j->code_bits < 1) stbi__grow_buffer_unsafe(j); + k = j->code_buffer; + j->code_buffer <<= 1; + --j->code_bits; + return k & 0x80000000; +} + +// given a value that's at position X in the zigzag stream, +// where does it appear in the 8x8 matrix coded as row-major? +static stbi_uc stbi__jpeg_dezigzag[64+15] = +{ + 0, 1, 8, 16, 9, 2, 3, 10, + 17, 24, 32, 25, 18, 11, 4, 5, + 12, 19, 26, 33, 40, 48, 41, 34, + 27, 20, 13, 6, 7, 14, 21, 28, + 35, 42, 49, 56, 57, 50, 43, 36, + 29, 22, 15, 23, 30, 37, 44, 51, + 58, 59, 52, 45, 38, 31, 39, 46, + 53, 60, 61, 54, 47, 55, 62, 63, + // let corrupt input sample past end + 63, 63, 63, 63, 63, 63, 63, 63, + 63, 63, 63, 63, 63, 63, 63 +}; + +// decode one 64-entry block-- +static int stbi__jpeg_decode_block(stbi__jpeg *j, short data[64], stbi__huffman *hdc, stbi__huffman *hac, stbi__int16 *fac, int b, stbi_uc *dequant) +{ + int diff,dc,k; + int t; + + if (j->code_bits < 16) stbi__grow_buffer_unsafe(j); + t = stbi__jpeg_huff_decode(j, hdc); + if (t < 0) return stbi__err("bad huffman code","Corrupt JPEG"); + + // 0 all the ac values now so we can do it 32-bits at a time + memset(data,0,64*sizeof(data[0])); + + diff = t ? stbi__extend_receive(j, t) : 0; + dc = j->img_comp[b].dc_pred + diff; + j->img_comp[b].dc_pred = dc; + data[0] = (short) (dc * dequant[0]); + + // decode AC components, see JPEG spec + k = 1; + do { + unsigned int zig; + int c,r,s; + if (j->code_bits < 16) stbi__grow_buffer_unsafe(j); + c = (j->code_buffer >> (32 - FAST_BITS)) & ((1 << FAST_BITS)-1); + r = fac[c]; + if (r) { // fast-AC path + k += (r >> 4) & 15; // run + s = r & 15; // combined length + j->code_buffer <<= s; + j->code_bits -= s; + // decode into unzigzag'd location + zig = stbi__jpeg_dezigzag[k++]; + data[zig] = (short) ((r >> 8) * dequant[zig]); + } else { + int rs = stbi__jpeg_huff_decode(j, hac); + if (rs < 0) return stbi__err("bad huffman code","Corrupt JPEG"); + s = rs & 15; + r = rs >> 4; + if (s == 0) { + if (rs != 0xf0) break; // end block + k += 16; + } else { + k += r; + // decode into unzigzag'd location + zig = stbi__jpeg_dezigzag[k++]; + data[zig] = (short) (stbi__extend_receive(j,s) * dequant[zig]); + } + } + } while (k < 64); + return 1; +} + +static int stbi__jpeg_decode_block_prog_dc(stbi__jpeg *j, short data[64], stbi__huffman *hdc, int b) +{ + int diff,dc; + int t; + if (j->spec_end != 0) return stbi__err("can't merge dc and ac", "Corrupt JPEG"); + + if (j->code_bits < 16) stbi__grow_buffer_unsafe(j); + + if (j->succ_high == 0) { + // first scan for DC coefficient, must be first + memset(data,0,64*sizeof(data[0])); // 0 all the ac values now + t = stbi__jpeg_huff_decode(j, hdc); + diff = t ? stbi__extend_receive(j, t) : 0; + + dc = j->img_comp[b].dc_pred + diff; + j->img_comp[b].dc_pred = dc; + data[0] = (short) (dc << j->succ_low); + } else { + // refinement scan for DC coefficient + if (stbi__jpeg_get_bit(j)) + data[0] += (short) (1 << j->succ_low); + } + return 1; +} + +// @OPTIMIZE: store non-zigzagged during the decode passes, +// and only de-zigzag when dequantizing +static int stbi__jpeg_decode_block_prog_ac(stbi__jpeg *j, short data[64], stbi__huffman *hac, stbi__int16 *fac) +{ + int k; + if (j->spec_start == 0) return stbi__err("can't merge dc and ac", "Corrupt JPEG"); + + if (j->succ_high == 0) { + int shift = j->succ_low; + + if (j->eob_run) { + --j->eob_run; + return 1; + } + + k = j->spec_start; + do { + unsigned int zig; + int c,r,s; + if (j->code_bits < 16) stbi__grow_buffer_unsafe(j); + c = (j->code_buffer >> (32 - FAST_BITS)) & ((1 << FAST_BITS)-1); + r = fac[c]; + if (r) { // fast-AC path + k += (r >> 4) & 15; // run + s = r & 15; // combined length + j->code_buffer <<= s; + j->code_bits -= s; + zig = stbi__jpeg_dezigzag[k++]; + data[zig] = (short) ((r >> 8) << shift); + } else { + int rs = stbi__jpeg_huff_decode(j, hac); + if (rs < 0) return stbi__err("bad huffman code","Corrupt JPEG"); + s = rs & 15; + r = rs >> 4; + if (s == 0) { + if (r < 15) { + j->eob_run = (1 << r); + if (r) + j->eob_run += stbi__jpeg_get_bits(j, r); + --j->eob_run; + break; + } + k += 16; + } else { + k += r; + zig = stbi__jpeg_dezigzag[k++]; + data[zig] = (short) (stbi__extend_receive(j,s) << shift); + } + } + } while (k <= j->spec_end); + } else { + // refinement scan for these AC coefficients + + short bit = (short) (1 << j->succ_low); + + if (j->eob_run) { + --j->eob_run; + for (k = j->spec_start; k <= j->spec_end; ++k) { + short *p = &data[stbi__jpeg_dezigzag[k]]; + if (*p != 0) + if (stbi__jpeg_get_bit(j)) + if ((*p & bit)==0) { + if (*p > 0) + *p += bit; + else + *p -= bit; + } + } + } else { + k = j->spec_start; + do { + int r,s; + int rs = stbi__jpeg_huff_decode(j, hac); // @OPTIMIZE see if we can use the fast path here, advance-by-r is so slow, eh + if (rs < 0) return stbi__err("bad huffman code","Corrupt JPEG"); + s = rs & 15; + r = rs >> 4; + if (s == 0) { + if (r < 15) { + j->eob_run = (1 << r) - 1; + if (r) + j->eob_run += stbi__jpeg_get_bits(j, r); + r = 64; // force end of block + } else { + // r=15 s=0 should write 16 0s, so we just do + // a run of 15 0s and then write s (which is 0), + // so we don't have to do anything special here + } + } else { + if (s != 1) return stbi__err("bad huffman code", "Corrupt JPEG"); + // sign bit + if (stbi__jpeg_get_bit(j)) + s = bit; + else + s = -bit; + } + + // advance by r + while (k <= j->spec_end) { + short *p = &data[stbi__jpeg_dezigzag[k++]]; + if (*p != 0) { + if (stbi__jpeg_get_bit(j)) + if ((*p & bit)==0) { + if (*p > 0) + *p += bit; + else + *p -= bit; + } + } else { + if (r == 0) { + *p = (short) s; + break; + } + --r; + } + } + } while (k <= j->spec_end); + } + } + return 1; +} + +// take a -128..127 value and stbi__clamp it and convert to 0..255 +stbi_inline static stbi_uc stbi__clamp(int x) +{ + // trick to use a single test to catch both cases + if ((unsigned int) x > 255) { + if (x < 0) return 0; + if (x > 255) return 255; + } + return (stbi_uc) x; +} + +#define stbi__f2f(x) ((int) (((x) * 4096 + 0.5))) +#define stbi__fsh(x) ((x) << 12) + +// derived from jidctint -- DCT_ISLOW +#define STBI__IDCT_1D(s0,s1,s2,s3,s4,s5,s6,s7) \ + int t0,t1,t2,t3,p1,p2,p3,p4,p5,x0,x1,x2,x3; \ + p2 = s2; \ + p3 = s6; \ + p1 = (p2+p3) * stbi__f2f(0.5411961f); \ + t2 = p1 + p3*stbi__f2f(-1.847759065f); \ + t3 = p1 + p2*stbi__f2f( 0.765366865f); \ + p2 = s0; \ + p3 = s4; \ + t0 = stbi__fsh(p2+p3); \ + t1 = stbi__fsh(p2-p3); \ + x0 = t0+t3; \ + x3 = t0-t3; \ + x1 = t1+t2; \ + x2 = t1-t2; \ + t0 = s7; \ + t1 = s5; \ + t2 = s3; \ + t3 = s1; \ + p3 = t0+t2; \ + p4 = t1+t3; \ + p1 = t0+t3; \ + p2 = t1+t2; \ + p5 = (p3+p4)*stbi__f2f( 1.175875602f); \ + t0 = t0*stbi__f2f( 0.298631336f); \ + t1 = t1*stbi__f2f( 2.053119869f); \ + t2 = t2*stbi__f2f( 3.072711026f); \ + t3 = t3*stbi__f2f( 1.501321110f); \ + p1 = p5 + p1*stbi__f2f(-0.899976223f); \ + p2 = p5 + p2*stbi__f2f(-2.562915447f); \ + p3 = p3*stbi__f2f(-1.961570560f); \ + p4 = p4*stbi__f2f(-0.390180644f); \ + t3 += p1+p4; \ + t2 += p2+p3; \ + t1 += p2+p4; \ + t0 += p1+p3; + +static void stbi__idct_block(stbi_uc *out, int out_stride, short data[64]) +{ + int i,val[64],*v=val; + stbi_uc *o; + short *d = data; + + // columns + for (i=0; i < 8; ++i,++d, ++v) { + // if all zeroes, shortcut -- this avoids dequantizing 0s and IDCTing + if (d[ 8]==0 && d[16]==0 && d[24]==0 && d[32]==0 + && d[40]==0 && d[48]==0 && d[56]==0) { + // no shortcut 0 seconds + // (1|2|3|4|5|6|7)==0 0 seconds + // all separate -0.047 seconds + // 1 && 2|3 && 4|5 && 6|7: -0.047 seconds + int dcterm = d[0] << 2; + v[0] = v[8] = v[16] = v[24] = v[32] = v[40] = v[48] = v[56] = dcterm; + } else { + STBI__IDCT_1D(d[ 0],d[ 8],d[16],d[24],d[32],d[40],d[48],d[56]) + // constants scaled things up by 1<<12; let's bring them back + // down, but keep 2 extra bits of precision + x0 += 512; x1 += 512; x2 += 512; x3 += 512; + v[ 0] = (x0+t3) >> 10; + v[56] = (x0-t3) >> 10; + v[ 8] = (x1+t2) >> 10; + v[48] = (x1-t2) >> 10; + v[16] = (x2+t1) >> 10; + v[40] = (x2-t1) >> 10; + v[24] = (x3+t0) >> 10; + v[32] = (x3-t0) >> 10; + } + } + + for (i=0, v=val, o=out; i < 8; ++i,v+=8,o+=out_stride) { + // no fast case since the first 1D IDCT spread components out + STBI__IDCT_1D(v[0],v[1],v[2],v[3],v[4],v[5],v[6],v[7]) + // constants scaled things up by 1<<12, plus we had 1<<2 from first + // loop, plus horizontal and vertical each scale by sqrt(8) so together + // we've got an extra 1<<3, so 1<<17 total we need to remove. + // so we want to round that, which means adding 0.5 * 1<<17, + // aka 65536. Also, we'll end up with -128 to 127 that we want + // to encode as 0..255 by adding 128, so we'll add that before the shift + x0 += 65536 + (128<<17); + x1 += 65536 + (128<<17); + x2 += 65536 + (128<<17); + x3 += 65536 + (128<<17); + // tried computing the shifts into temps, or'ing the temps to see + // if any were out of range, but that was slower + o[0] = stbi__clamp((x0+t3) >> 17); + o[7] = stbi__clamp((x0-t3) >> 17); + o[1] = stbi__clamp((x1+t2) >> 17); + o[6] = stbi__clamp((x1-t2) >> 17); + o[2] = stbi__clamp((x2+t1) >> 17); + o[5] = stbi__clamp((x2-t1) >> 17); + o[3] = stbi__clamp((x3+t0) >> 17); + o[4] = stbi__clamp((x3-t0) >> 17); + } +} + +#ifdef STBI_SSE2 +// sse2 integer IDCT. not the fastest possible implementation but it +// produces bit-identical results to the generic C version so it's +// fully "transparent". +static void stbi__idct_simd(stbi_uc *out, int out_stride, short data[64]) +{ + // This is constructed to match our regular (generic) integer IDCT exactly. + __m128i row0, row1, row2, row3, row4, row5, row6, row7; + __m128i tmp; + + // dot product constant: even elems=x, odd elems=y + #define dct_const(x,y) _mm_setr_epi16((x),(y),(x),(y),(x),(y),(x),(y)) + + // out(0) = c0[even]*x + c0[odd]*y (c0, x, y 16-bit, out 32-bit) + // out(1) = c1[even]*x + c1[odd]*y + #define dct_rot(out0,out1, x,y,c0,c1) \ + __m128i c0##lo = _mm_unpacklo_epi16((x),(y)); \ + __m128i c0##hi = _mm_unpackhi_epi16((x),(y)); \ + __m128i out0##_l = _mm_madd_epi16(c0##lo, c0); \ + __m128i out0##_h = _mm_madd_epi16(c0##hi, c0); \ + __m128i out1##_l = _mm_madd_epi16(c0##lo, c1); \ + __m128i out1##_h = _mm_madd_epi16(c0##hi, c1) + + // out = in << 12 (in 16-bit, out 32-bit) + #define dct_widen(out, in) \ + __m128i out##_l = _mm_srai_epi32(_mm_unpacklo_epi16(_mm_setzero_si128(), (in)), 4); \ + __m128i out##_h = _mm_srai_epi32(_mm_unpackhi_epi16(_mm_setzero_si128(), (in)), 4) + + // wide add + #define dct_wadd(out, a, b) \ + __m128i out##_l = _mm_add_epi32(a##_l, b##_l); \ + __m128i out##_h = _mm_add_epi32(a##_h, b##_h) + + // wide sub + #define dct_wsub(out, a, b) \ + __m128i out##_l = _mm_sub_epi32(a##_l, b##_l); \ + __m128i out##_h = _mm_sub_epi32(a##_h, b##_h) + + // butterfly a/b, add bias, then shift by "s" and pack + #define dct_bfly32o(out0, out1, a,b,bias,s) \ + { \ + __m128i abiased_l = _mm_add_epi32(a##_l, bias); \ + __m128i abiased_h = _mm_add_epi32(a##_h, bias); \ + dct_wadd(sum, abiased, b); \ + dct_wsub(dif, abiased, b); \ + out0 = _mm_packs_epi32(_mm_srai_epi32(sum_l, s), _mm_srai_epi32(sum_h, s)); \ + out1 = _mm_packs_epi32(_mm_srai_epi32(dif_l, s), _mm_srai_epi32(dif_h, s)); \ + } + + // 8-bit interleave step (for transposes) + #define dct_interleave8(a, b) \ + tmp = a; \ + a = _mm_unpacklo_epi8(a, b); \ + b = _mm_unpackhi_epi8(tmp, b) + + // 16-bit interleave step (for transposes) + #define dct_interleave16(a, b) \ + tmp = a; \ + a = _mm_unpacklo_epi16(a, b); \ + b = _mm_unpackhi_epi16(tmp, b) + + #define dct_pass(bias,shift) \ + { \ + /* even part */ \ + dct_rot(t2e,t3e, row2,row6, rot0_0,rot0_1); \ + __m128i sum04 = _mm_add_epi16(row0, row4); \ + __m128i dif04 = _mm_sub_epi16(row0, row4); \ + dct_widen(t0e, sum04); \ + dct_widen(t1e, dif04); \ + dct_wadd(x0, t0e, t3e); \ + dct_wsub(x3, t0e, t3e); \ + dct_wadd(x1, t1e, t2e); \ + dct_wsub(x2, t1e, t2e); \ + /* odd part */ \ + dct_rot(y0o,y2o, row7,row3, rot2_0,rot2_1); \ + dct_rot(y1o,y3o, row5,row1, rot3_0,rot3_1); \ + __m128i sum17 = _mm_add_epi16(row1, row7); \ + __m128i sum35 = _mm_add_epi16(row3, row5); \ + dct_rot(y4o,y5o, sum17,sum35, rot1_0,rot1_1); \ + dct_wadd(x4, y0o, y4o); \ + dct_wadd(x5, y1o, y5o); \ + dct_wadd(x6, y2o, y5o); \ + dct_wadd(x7, y3o, y4o); \ + dct_bfly32o(row0,row7, x0,x7,bias,shift); \ + dct_bfly32o(row1,row6, x1,x6,bias,shift); \ + dct_bfly32o(row2,row5, x2,x5,bias,shift); \ + dct_bfly32o(row3,row4, x3,x4,bias,shift); \ + } + + __m128i rot0_0 = dct_const(stbi__f2f(0.5411961f), stbi__f2f(0.5411961f) + stbi__f2f(-1.847759065f)); + __m128i rot0_1 = dct_const(stbi__f2f(0.5411961f) + stbi__f2f( 0.765366865f), stbi__f2f(0.5411961f)); + __m128i rot1_0 = dct_const(stbi__f2f(1.175875602f) + stbi__f2f(-0.899976223f), stbi__f2f(1.175875602f)); + __m128i rot1_1 = dct_const(stbi__f2f(1.175875602f), stbi__f2f(1.175875602f) + stbi__f2f(-2.562915447f)); + __m128i rot2_0 = dct_const(stbi__f2f(-1.961570560f) + stbi__f2f( 0.298631336f), stbi__f2f(-1.961570560f)); + __m128i rot2_1 = dct_const(stbi__f2f(-1.961570560f), stbi__f2f(-1.961570560f) + stbi__f2f( 3.072711026f)); + __m128i rot3_0 = dct_const(stbi__f2f(-0.390180644f) + stbi__f2f( 2.053119869f), stbi__f2f(-0.390180644f)); + __m128i rot3_1 = dct_const(stbi__f2f(-0.390180644f), stbi__f2f(-0.390180644f) + stbi__f2f( 1.501321110f)); + + // rounding biases in column/row passes, see stbi__idct_block for explanation. + __m128i bias_0 = _mm_set1_epi32(512); + __m128i bias_1 = _mm_set1_epi32(65536 + (128<<17)); + + // load + row0 = _mm_load_si128((const __m128i *) (data + 0*8)); + row1 = _mm_load_si128((const __m128i *) (data + 1*8)); + row2 = _mm_load_si128((const __m128i *) (data + 2*8)); + row3 = _mm_load_si128((const __m128i *) (data + 3*8)); + row4 = _mm_load_si128((const __m128i *) (data + 4*8)); + row5 = _mm_load_si128((const __m128i *) (data + 5*8)); + row6 = _mm_load_si128((const __m128i *) (data + 6*8)); + row7 = _mm_load_si128((const __m128i *) (data + 7*8)); + + // column pass + dct_pass(bias_0, 10); + + { + // 16bit 8x8 transpose pass 1 + dct_interleave16(row0, row4); + dct_interleave16(row1, row5); + dct_interleave16(row2, row6); + dct_interleave16(row3, row7); + + // transpose pass 2 + dct_interleave16(row0, row2); + dct_interleave16(row1, row3); + dct_interleave16(row4, row6); + dct_interleave16(row5, row7); + + // transpose pass 3 + dct_interleave16(row0, row1); + dct_interleave16(row2, row3); + dct_interleave16(row4, row5); + dct_interleave16(row6, row7); + } + + // row pass + dct_pass(bias_1, 17); + + { + // pack + __m128i p0 = _mm_packus_epi16(row0, row1); // a0a1a2a3...a7b0b1b2b3...b7 + __m128i p1 = _mm_packus_epi16(row2, row3); + __m128i p2 = _mm_packus_epi16(row4, row5); + __m128i p3 = _mm_packus_epi16(row6, row7); + + // 8bit 8x8 transpose pass 1 + dct_interleave8(p0, p2); // a0e0a1e1... + dct_interleave8(p1, p3); // c0g0c1g1... + + // transpose pass 2 + dct_interleave8(p0, p1); // a0c0e0g0... + dct_interleave8(p2, p3); // b0d0f0h0... + + // transpose pass 3 + dct_interleave8(p0, p2); // a0b0c0d0... + dct_interleave8(p1, p3); // a4b4c4d4... + + // store + _mm_storel_epi64((__m128i *) out, p0); out += out_stride; + _mm_storel_epi64((__m128i *) out, _mm_shuffle_epi32(p0, 0x4e)); out += out_stride; + _mm_storel_epi64((__m128i *) out, p2); out += out_stride; + _mm_storel_epi64((__m128i *) out, _mm_shuffle_epi32(p2, 0x4e)); out += out_stride; + _mm_storel_epi64((__m128i *) out, p1); out += out_stride; + _mm_storel_epi64((__m128i *) out, _mm_shuffle_epi32(p1, 0x4e)); out += out_stride; + _mm_storel_epi64((__m128i *) out, p3); out += out_stride; + _mm_storel_epi64((__m128i *) out, _mm_shuffle_epi32(p3, 0x4e)); + } + +#undef dct_const +#undef dct_rot +#undef dct_widen +#undef dct_wadd +#undef dct_wsub +#undef dct_bfly32o +#undef dct_interleave8 +#undef dct_interleave16 +#undef dct_pass +} + +#endif // STBI_SSE2 + +#ifdef STBI_NEON + +// NEON integer IDCT. should produce bit-identical +// results to the generic C version. +static void stbi__idct_simd(stbi_uc *out, int out_stride, short data[64]) +{ + int16x8_t row0, row1, row2, row3, row4, row5, row6, row7; + + int16x4_t rot0_0 = vdup_n_s16(stbi__f2f(0.5411961f)); + int16x4_t rot0_1 = vdup_n_s16(stbi__f2f(-1.847759065f)); + int16x4_t rot0_2 = vdup_n_s16(stbi__f2f( 0.765366865f)); + int16x4_t rot1_0 = vdup_n_s16(stbi__f2f( 1.175875602f)); + int16x4_t rot1_1 = vdup_n_s16(stbi__f2f(-0.899976223f)); + int16x4_t rot1_2 = vdup_n_s16(stbi__f2f(-2.562915447f)); + int16x4_t rot2_0 = vdup_n_s16(stbi__f2f(-1.961570560f)); + int16x4_t rot2_1 = vdup_n_s16(stbi__f2f(-0.390180644f)); + int16x4_t rot3_0 = vdup_n_s16(stbi__f2f( 0.298631336f)); + int16x4_t rot3_1 = vdup_n_s16(stbi__f2f( 2.053119869f)); + int16x4_t rot3_2 = vdup_n_s16(stbi__f2f( 3.072711026f)); + int16x4_t rot3_3 = vdup_n_s16(stbi__f2f( 1.501321110f)); + +#define dct_long_mul(out, inq, coeff) \ + int32x4_t out##_l = vmull_s16(vget_low_s16(inq), coeff); \ + int32x4_t out##_h = vmull_s16(vget_high_s16(inq), coeff) + +#define dct_long_mac(out, acc, inq, coeff) \ + int32x4_t out##_l = vmlal_s16(acc##_l, vget_low_s16(inq), coeff); \ + int32x4_t out##_h = vmlal_s16(acc##_h, vget_high_s16(inq), coeff) + +#define dct_widen(out, inq) \ + int32x4_t out##_l = vshll_n_s16(vget_low_s16(inq), 12); \ + int32x4_t out##_h = vshll_n_s16(vget_high_s16(inq), 12) + +// wide add +#define dct_wadd(out, a, b) \ + int32x4_t out##_l = vaddq_s32(a##_l, b##_l); \ + int32x4_t out##_h = vaddq_s32(a##_h, b##_h) + +// wide sub +#define dct_wsub(out, a, b) \ + int32x4_t out##_l = vsubq_s32(a##_l, b##_l); \ + int32x4_t out##_h = vsubq_s32(a##_h, b##_h) + +// butterfly a/b, then shift using "shiftop" by "s" and pack +#define dct_bfly32o(out0,out1, a,b,shiftop,s) \ + { \ + dct_wadd(sum, a, b); \ + dct_wsub(dif, a, b); \ + out0 = vcombine_s16(shiftop(sum_l, s), shiftop(sum_h, s)); \ + out1 = vcombine_s16(shiftop(dif_l, s), shiftop(dif_h, s)); \ + } + +#define dct_pass(shiftop, shift) \ + { \ + /* even part */ \ + int16x8_t sum26 = vaddq_s16(row2, row6); \ + dct_long_mul(p1e, sum26, rot0_0); \ + dct_long_mac(t2e, p1e, row6, rot0_1); \ + dct_long_mac(t3e, p1e, row2, rot0_2); \ + int16x8_t sum04 = vaddq_s16(row0, row4); \ + int16x8_t dif04 = vsubq_s16(row0, row4); \ + dct_widen(t0e, sum04); \ + dct_widen(t1e, dif04); \ + dct_wadd(x0, t0e, t3e); \ + dct_wsub(x3, t0e, t3e); \ + dct_wadd(x1, t1e, t2e); \ + dct_wsub(x2, t1e, t2e); \ + /* odd part */ \ + int16x8_t sum15 = vaddq_s16(row1, row5); \ + int16x8_t sum17 = vaddq_s16(row1, row7); \ + int16x8_t sum35 = vaddq_s16(row3, row5); \ + int16x8_t sum37 = vaddq_s16(row3, row7); \ + int16x8_t sumodd = vaddq_s16(sum17, sum35); \ + dct_long_mul(p5o, sumodd, rot1_0); \ + dct_long_mac(p1o, p5o, sum17, rot1_1); \ + dct_long_mac(p2o, p5o, sum35, rot1_2); \ + dct_long_mul(p3o, sum37, rot2_0); \ + dct_long_mul(p4o, sum15, rot2_1); \ + dct_wadd(sump13o, p1o, p3o); \ + dct_wadd(sump24o, p2o, p4o); \ + dct_wadd(sump23o, p2o, p3o); \ + dct_wadd(sump14o, p1o, p4o); \ + dct_long_mac(x4, sump13o, row7, rot3_0); \ + dct_long_mac(x5, sump24o, row5, rot3_1); \ + dct_long_mac(x6, sump23o, row3, rot3_2); \ + dct_long_mac(x7, sump14o, row1, rot3_3); \ + dct_bfly32o(row0,row7, x0,x7,shiftop,shift); \ + dct_bfly32o(row1,row6, x1,x6,shiftop,shift); \ + dct_bfly32o(row2,row5, x2,x5,shiftop,shift); \ + dct_bfly32o(row3,row4, x3,x4,shiftop,shift); \ + } + + // load + row0 = vld1q_s16(data + 0*8); + row1 = vld1q_s16(data + 1*8); + row2 = vld1q_s16(data + 2*8); + row3 = vld1q_s16(data + 3*8); + row4 = vld1q_s16(data + 4*8); + row5 = vld1q_s16(data + 5*8); + row6 = vld1q_s16(data + 6*8); + row7 = vld1q_s16(data + 7*8); + + // add DC bias + row0 = vaddq_s16(row0, vsetq_lane_s16(1024, vdupq_n_s16(0), 0)); + + // column pass + dct_pass(vrshrn_n_s32, 10); + + // 16bit 8x8 transpose + { +// these three map to a single VTRN.16, VTRN.32, and VSWP, respectively. +// whether compilers actually get this is another story, sadly. +#define dct_trn16(x, y) { int16x8x2_t t = vtrnq_s16(x, y); x = t.val[0]; y = t.val[1]; } +#define dct_trn32(x, y) { int32x4x2_t t = vtrnq_s32(vreinterpretq_s32_s16(x), vreinterpretq_s32_s16(y)); x = vreinterpretq_s16_s32(t.val[0]); y = vreinterpretq_s16_s32(t.val[1]); } +#define dct_trn64(x, y) { int16x8_t x0 = x; int16x8_t y0 = y; x = vcombine_s16(vget_low_s16(x0), vget_low_s16(y0)); y = vcombine_s16(vget_high_s16(x0), vget_high_s16(y0)); } + + // pass 1 + dct_trn16(row0, row1); // a0b0a2b2a4b4a6b6 + dct_trn16(row2, row3); + dct_trn16(row4, row5); + dct_trn16(row6, row7); + + // pass 2 + dct_trn32(row0, row2); // a0b0c0d0a4b4c4d4 + dct_trn32(row1, row3); + dct_trn32(row4, row6); + dct_trn32(row5, row7); + + // pass 3 + dct_trn64(row0, row4); // a0b0c0d0e0f0g0h0 + dct_trn64(row1, row5); + dct_trn64(row2, row6); + dct_trn64(row3, row7); + +#undef dct_trn16 +#undef dct_trn32 +#undef dct_trn64 + } + + // row pass + // vrshrn_n_s32 only supports shifts up to 16, we need + // 17. so do a non-rounding shift of 16 first then follow + // up with a rounding shift by 1. + dct_pass(vshrn_n_s32, 16); + + { + // pack and round + uint8x8_t p0 = vqrshrun_n_s16(row0, 1); + uint8x8_t p1 = vqrshrun_n_s16(row1, 1); + uint8x8_t p2 = vqrshrun_n_s16(row2, 1); + uint8x8_t p3 = vqrshrun_n_s16(row3, 1); + uint8x8_t p4 = vqrshrun_n_s16(row4, 1); + uint8x8_t p5 = vqrshrun_n_s16(row5, 1); + uint8x8_t p6 = vqrshrun_n_s16(row6, 1); + uint8x8_t p7 = vqrshrun_n_s16(row7, 1); + + // again, these can translate into one instruction, but often don't. +#define dct_trn8_8(x, y) { uint8x8x2_t t = vtrn_u8(x, y); x = t.val[0]; y = t.val[1]; } +#define dct_trn8_16(x, y) { uint16x4x2_t t = vtrn_u16(vreinterpret_u16_u8(x), vreinterpret_u16_u8(y)); x = vreinterpret_u8_u16(t.val[0]); y = vreinterpret_u8_u16(t.val[1]); } +#define dct_trn8_32(x, y) { uint32x2x2_t t = vtrn_u32(vreinterpret_u32_u8(x), vreinterpret_u32_u8(y)); x = vreinterpret_u8_u32(t.val[0]); y = vreinterpret_u8_u32(t.val[1]); } + + // sadly can't use interleaved stores here since we only write + // 8 bytes to each scan line! + + // 8x8 8-bit transpose pass 1 + dct_trn8_8(p0, p1); + dct_trn8_8(p2, p3); + dct_trn8_8(p4, p5); + dct_trn8_8(p6, p7); + + // pass 2 + dct_trn8_16(p0, p2); + dct_trn8_16(p1, p3); + dct_trn8_16(p4, p6); + dct_trn8_16(p5, p7); + + // pass 3 + dct_trn8_32(p0, p4); + dct_trn8_32(p1, p5); + dct_trn8_32(p2, p6); + dct_trn8_32(p3, p7); + + // store + vst1_u8(out, p0); out += out_stride; + vst1_u8(out, p1); out += out_stride; + vst1_u8(out, p2); out += out_stride; + vst1_u8(out, p3); out += out_stride; + vst1_u8(out, p4); out += out_stride; + vst1_u8(out, p5); out += out_stride; + vst1_u8(out, p6); out += out_stride; + vst1_u8(out, p7); + +#undef dct_trn8_8 +#undef dct_trn8_16 +#undef dct_trn8_32 + } + +#undef dct_long_mul +#undef dct_long_mac +#undef dct_widen +#undef dct_wadd +#undef dct_wsub +#undef dct_bfly32o +#undef dct_pass +} + +#endif // STBI_NEON + +#define STBI__MARKER_none 0xff +// if there's a pending marker from the entropy stream, return that +// otherwise, fetch from the stream and get a marker. if there's no +// marker, return 0xff, which is never a valid marker value +static stbi_uc stbi__get_marker(stbi__jpeg *j) +{ + stbi_uc x; + if (j->marker != STBI__MARKER_none) { x = j->marker; j->marker = STBI__MARKER_none; return x; } + x = stbi__get8(j->s); + if (x != 0xff) return STBI__MARKER_none; + while (x == 0xff) + x = stbi__get8(j->s); + return x; +} + +// in each scan, we'll have scan_n components, and the order +// of the components is specified by order[] +#define STBI__RESTART(x) ((x) >= 0xd0 && (x) <= 0xd7) + +// after a restart interval, stbi__jpeg_reset the entropy decoder and +// the dc prediction +static void stbi__jpeg_reset(stbi__jpeg *j) +{ + j->code_bits = 0; + j->code_buffer = 0; + j->nomore = 0; + j->img_comp[0].dc_pred = j->img_comp[1].dc_pred = j->img_comp[2].dc_pred = 0; + j->marker = STBI__MARKER_none; + j->todo = j->restart_interval ? j->restart_interval : 0x7fffffff; + j->eob_run = 0; + // no more than 1<<31 MCUs if no restart_interal? that's plenty safe, + // since we don't even allow 1<<30 pixels +} + +static int stbi__parse_entropy_coded_data(stbi__jpeg *z) +{ + stbi__jpeg_reset(z); + if (!z->progressive) { + if (z->scan_n == 1) { + int i,j; + STBI_SIMD_ALIGN(short, data[64]); + int n = z->order[0]; + // non-interleaved data, we just need to process one block at a time, + // in trivial scanline order + // number of blocks to do just depends on how many actual "pixels" this + // component has, independent of interleaved MCU blocking and such + int w = (z->img_comp[n].x+7) >> 3; + int h = (z->img_comp[n].y+7) >> 3; + for (j=0; j < h; ++j) { + for (i=0; i < w; ++i) { + int ha = z->img_comp[n].ha; + if (!stbi__jpeg_decode_block(z, data, z->huff_dc+z->img_comp[n].hd, z->huff_ac+ha, z->fast_ac[ha], n, z->dequant[z->img_comp[n].tq])) return 0; + z->idct_block_kernel(z->img_comp[n].data+z->img_comp[n].w2*j*8+i*8, z->img_comp[n].w2, data); + // every data block is an MCU, so countdown the restart interval + if (--z->todo <= 0) { + if (z->code_bits < 24) stbi__grow_buffer_unsafe(z); + // if it's NOT a restart, then just bail, so we get corrupt data + // rather than no data + if (!STBI__RESTART(z->marker)) return 1; + stbi__jpeg_reset(z); + } + } + } + return 1; + } else { // interleaved + int i,j,k,x,y; + STBI_SIMD_ALIGN(short, data[64]); + for (j=0; j < z->img_mcu_y; ++j) { + for (i=0; i < z->img_mcu_x; ++i) { + // scan an interleaved mcu... process scan_n components in order + for (k=0; k < z->scan_n; ++k) { + int n = z->order[k]; + // scan out an mcu's worth of this component; that's just determined + // by the basic H and V specified for the component + for (y=0; y < z->img_comp[n].v; ++y) { + for (x=0; x < z->img_comp[n].h; ++x) { + int x2 = (i*z->img_comp[n].h + x)*8; + int y2 = (j*z->img_comp[n].v + y)*8; + int ha = z->img_comp[n].ha; + if (!stbi__jpeg_decode_block(z, data, z->huff_dc+z->img_comp[n].hd, z->huff_ac+ha, z->fast_ac[ha], n, z->dequant[z->img_comp[n].tq])) return 0; + z->idct_block_kernel(z->img_comp[n].data+z->img_comp[n].w2*y2+x2, z->img_comp[n].w2, data); + } + } + } + // after all interleaved components, that's an interleaved MCU, + // so now count down the restart interval + if (--z->todo <= 0) { + if (z->code_bits < 24) stbi__grow_buffer_unsafe(z); + if (!STBI__RESTART(z->marker)) return 1; + stbi__jpeg_reset(z); + } + } + } + return 1; + } + } else { + if (z->scan_n == 1) { + int i,j; + int n = z->order[0]; + // non-interleaved data, we just need to process one block at a time, + // in trivial scanline order + // number of blocks to do just depends on how many actual "pixels" this + // component has, independent of interleaved MCU blocking and such + int w = (z->img_comp[n].x+7) >> 3; + int h = (z->img_comp[n].y+7) >> 3; + for (j=0; j < h; ++j) { + for (i=0; i < w; ++i) { + short *data = z->img_comp[n].coeff + 64 * (i + j * z->img_comp[n].coeff_w); + if (z->spec_start == 0) { + if (!stbi__jpeg_decode_block_prog_dc(z, data, &z->huff_dc[z->img_comp[n].hd], n)) + return 0; + } else { + int ha = z->img_comp[n].ha; + if (!stbi__jpeg_decode_block_prog_ac(z, data, &z->huff_ac[ha], z->fast_ac[ha])) + return 0; + } + // every data block is an MCU, so countdown the restart interval + if (--z->todo <= 0) { + if (z->code_bits < 24) stbi__grow_buffer_unsafe(z); + if (!STBI__RESTART(z->marker)) return 1; + stbi__jpeg_reset(z); + } + } + } + return 1; + } else { // interleaved + int i,j,k,x,y; + for (j=0; j < z->img_mcu_y; ++j) { + for (i=0; i < z->img_mcu_x; ++i) { + // scan an interleaved mcu... process scan_n components in order + for (k=0; k < z->scan_n; ++k) { + int n = z->order[k]; + // scan out an mcu's worth of this component; that's just determined + // by the basic H and V specified for the component + for (y=0; y < z->img_comp[n].v; ++y) { + for (x=0; x < z->img_comp[n].h; ++x) { + int x2 = (i*z->img_comp[n].h + x); + int y2 = (j*z->img_comp[n].v + y); + short *data = z->img_comp[n].coeff + 64 * (x2 + y2 * z->img_comp[n].coeff_w); + if (!stbi__jpeg_decode_block_prog_dc(z, data, &z->huff_dc[z->img_comp[n].hd], n)) + return 0; + } + } + } + // after all interleaved components, that's an interleaved MCU, + // so now count down the restart interval + if (--z->todo <= 0) { + if (z->code_bits < 24) stbi__grow_buffer_unsafe(z); + if (!STBI__RESTART(z->marker)) return 1; + stbi__jpeg_reset(z); + } + } + } + return 1; + } + } +} + +static void stbi__jpeg_dequantize(short *data, stbi_uc *dequant) +{ + int i; + for (i=0; i < 64; ++i) + data[i] *= dequant[i]; +} + +static void stbi__jpeg_finish(stbi__jpeg *z) +{ + if (z->progressive) { + // dequantize and idct the data + int i,j,n; + for (n=0; n < z->s->img_n; ++n) { + int w = (z->img_comp[n].x+7) >> 3; + int h = (z->img_comp[n].y+7) >> 3; + for (j=0; j < h; ++j) { + for (i=0; i < w; ++i) { + short *data = z->img_comp[n].coeff + 64 * (i + j * z->img_comp[n].coeff_w); + stbi__jpeg_dequantize(data, z->dequant[z->img_comp[n].tq]); + z->idct_block_kernel(z->img_comp[n].data+z->img_comp[n].w2*j*8+i*8, z->img_comp[n].w2, data); + } + } + } + } +} + +static int stbi__process_marker(stbi__jpeg *z, int m) +{ + int L; + switch (m) { + case STBI__MARKER_none: // no marker found + return stbi__err("expected marker","Corrupt JPEG"); + + case 0xDD: // DRI - specify restart interval + if (stbi__get16be(z->s) != 4) return stbi__err("bad DRI len","Corrupt JPEG"); + z->restart_interval = stbi__get16be(z->s); + return 1; + + case 0xDB: // DQT - define quantization table + L = stbi__get16be(z->s)-2; + while (L > 0) { + int q = stbi__get8(z->s); + int p = q >> 4; + int t = q & 15,i; + if (p != 0) return stbi__err("bad DQT type","Corrupt JPEG"); + if (t > 3) return stbi__err("bad DQT table","Corrupt JPEG"); + for (i=0; i < 64; ++i) + z->dequant[t][stbi__jpeg_dezigzag[i]] = stbi__get8(z->s); + L -= 65; + } + return L==0; + + case 0xC4: // DHT - define huffman table + L = stbi__get16be(z->s)-2; + while (L > 0) { + stbi_uc *v; + int sizes[16],i,n=0; + int q = stbi__get8(z->s); + int tc = q >> 4; + int th = q & 15; + if (tc > 1 || th > 3) return stbi__err("bad DHT header","Corrupt JPEG"); + for (i=0; i < 16; ++i) { + sizes[i] = stbi__get8(z->s); + n += sizes[i]; + } + L -= 17; + if (tc == 0) { + if (!stbi__build_huffman(z->huff_dc+th, sizes)) return 0; + v = z->huff_dc[th].values; + } else { + if (!stbi__build_huffman(z->huff_ac+th, sizes)) return 0; + v = z->huff_ac[th].values; + } + for (i=0; i < n; ++i) + v[i] = stbi__get8(z->s); + if (tc != 0) + stbi__build_fast_ac(z->fast_ac[th], z->huff_ac + th); + L -= n; + } + return L==0; + } + // check for comment block or APP blocks + if ((m >= 0xE0 && m <= 0xEF) || m == 0xFE) { + stbi__skip(z->s, stbi__get16be(z->s)-2); + return 1; + } + return 0; +} + +// after we see SOS +static int stbi__process_scan_header(stbi__jpeg *z) +{ + int i; + int Ls = stbi__get16be(z->s); + z->scan_n = stbi__get8(z->s); + if (z->scan_n < 1 || z->scan_n > 4 || z->scan_n > (int) z->s->img_n) return stbi__err("bad SOS component count","Corrupt JPEG"); + if (Ls != 6+2*z->scan_n) return stbi__err("bad SOS len","Corrupt JPEG"); + for (i=0; i < z->scan_n; ++i) { + int id = stbi__get8(z->s), which; + int q = stbi__get8(z->s); + for (which = 0; which < z->s->img_n; ++which) + if (z->img_comp[which].id == id) + break; + if (which == z->s->img_n) return 0; // no match + z->img_comp[which].hd = q >> 4; if (z->img_comp[which].hd > 3) return stbi__err("bad DC huff","Corrupt JPEG"); + z->img_comp[which].ha = q & 15; if (z->img_comp[which].ha > 3) return stbi__err("bad AC huff","Corrupt JPEG"); + z->order[i] = which; + } + + { + int aa; + z->spec_start = stbi__get8(z->s); + z->spec_end = stbi__get8(z->s); // should be 63, but might be 0 + aa = stbi__get8(z->s); + z->succ_high = (aa >> 4); + z->succ_low = (aa & 15); + if (z->progressive) { + if (z->spec_start > 63 || z->spec_end > 63 || z->spec_start > z->spec_end || z->succ_high > 13 || z->succ_low > 13) + return stbi__err("bad SOS", "Corrupt JPEG"); + } else { + if (z->spec_start != 0) return stbi__err("bad SOS","Corrupt JPEG"); + if (z->succ_high != 0 || z->succ_low != 0) return stbi__err("bad SOS","Corrupt JPEG"); + z->spec_end = 63; + } + } + + return 1; +} + +static int stbi__process_frame_header(stbi__jpeg *z, int scan) +{ + stbi__context *s = z->s; + int Lf,p,i,q, h_max=1,v_max=1,c; + Lf = stbi__get16be(s); if (Lf < 11) return stbi__err("bad SOF len","Corrupt JPEG"); // JPEG + p = stbi__get8(s); if (p != 8) return stbi__err("only 8-bit","JPEG format not supported: 8-bit only"); // JPEG baseline + s->img_y = stbi__get16be(s); if (s->img_y == 0) return stbi__err("no header height", "JPEG format not supported: delayed height"); // Legal, but we don't handle it--but neither does IJG + s->img_x = stbi__get16be(s); if (s->img_x == 0) return stbi__err("0 width","Corrupt JPEG"); // JPEG requires + c = stbi__get8(s); + if (c != 3 && c != 1) return stbi__err("bad component count","Corrupt JPEG"); // JFIF requires + s->img_n = c; + for (i=0; i < c; ++i) { + z->img_comp[i].data = NULL; + z->img_comp[i].linebuf = NULL; + } + + if (Lf != 8+3*s->img_n) return stbi__err("bad SOF len","Corrupt JPEG"); + + for (i=0; i < s->img_n; ++i) { + z->img_comp[i].id = stbi__get8(s); + if (z->img_comp[i].id != i+1) // JFIF requires + if (z->img_comp[i].id != i) // some version of jpegtran outputs non-JFIF-compliant files! + return stbi__err("bad component ID","Corrupt JPEG"); + q = stbi__get8(s); + z->img_comp[i].h = (q >> 4); if (!z->img_comp[i].h || z->img_comp[i].h > 4) return stbi__err("bad H","Corrupt JPEG"); + z->img_comp[i].v = q & 15; if (!z->img_comp[i].v || z->img_comp[i].v > 4) return stbi__err("bad V","Corrupt JPEG"); + z->img_comp[i].tq = stbi__get8(s); if (z->img_comp[i].tq > 3) return stbi__err("bad TQ","Corrupt JPEG"); + } + + if (scan != STBI__SCAN_load) return 1; + + if ((1 << 30) / s->img_x / s->img_n < s->img_y) return stbi__err("too large", "Image too large to decode"); + + for (i=0; i < s->img_n; ++i) { + if (z->img_comp[i].h > h_max) h_max = z->img_comp[i].h; + if (z->img_comp[i].v > v_max) v_max = z->img_comp[i].v; + } + + // compute interleaved mcu info + z->img_h_max = h_max; + z->img_v_max = v_max; + z->img_mcu_w = h_max * 8; + z->img_mcu_h = v_max * 8; + z->img_mcu_x = (s->img_x + z->img_mcu_w-1) / z->img_mcu_w; + z->img_mcu_y = (s->img_y + z->img_mcu_h-1) / z->img_mcu_h; + + for (i=0; i < s->img_n; ++i) { + // number of effective pixels (e.g. for non-interleaved MCU) + z->img_comp[i].x = (s->img_x * z->img_comp[i].h + h_max-1) / h_max; + z->img_comp[i].y = (s->img_y * z->img_comp[i].v + v_max-1) / v_max; + // to simplify generation, we'll allocate enough memory to decode + // the bogus oversized data from using interleaved MCUs and their + // big blocks (e.g. a 16x16 iMCU on an image of width 33); we won't + // discard the extra data until colorspace conversion + z->img_comp[i].w2 = z->img_mcu_x * z->img_comp[i].h * 8; + z->img_comp[i].h2 = z->img_mcu_y * z->img_comp[i].v * 8; + z->img_comp[i].raw_data = stbi__malloc(z->img_comp[i].w2 * z->img_comp[i].h2+15); + + if (z->img_comp[i].raw_data == NULL) { + for(--i; i >= 0; --i) { + STBI_FREE(z->img_comp[i].raw_data); + z->img_comp[i].raw_data = NULL; + } + return stbi__err("outofmem", "Out of memory"); + } + // align blocks for idct using mmx/sse + z->img_comp[i].data = (stbi_uc*) (((size_t) z->img_comp[i].raw_data + 15) & ~15); + z->img_comp[i].linebuf = NULL; + if (z->progressive) { + z->img_comp[i].coeff_w = (z->img_comp[i].w2 + 7) >> 3; + z->img_comp[i].coeff_h = (z->img_comp[i].h2 + 7) >> 3; + z->img_comp[i].raw_coeff = STBI_MALLOC(z->img_comp[i].coeff_w * z->img_comp[i].coeff_h * 64 * sizeof(short) + 15); + z->img_comp[i].coeff = (short*) (((size_t) z->img_comp[i].raw_coeff + 15) & ~15); + } else { + z->img_comp[i].coeff = 0; + z->img_comp[i].raw_coeff = 0; + } + } + + return 1; +} + +// use comparisons since in some cases we handle more than one case (e.g. SOF) +#define stbi__DNL(x) ((x) == 0xdc) +#define stbi__SOI(x) ((x) == 0xd8) +#define stbi__EOI(x) ((x) == 0xd9) +#define stbi__SOF(x) ((x) == 0xc0 || (x) == 0xc1 || (x) == 0xc2) +#define stbi__SOS(x) ((x) == 0xda) + +#define stbi__SOF_progressive(x) ((x) == 0xc2) + +static int stbi__decode_jpeg_header(stbi__jpeg *z, int scan) +{ + int m; + z->marker = STBI__MARKER_none; // initialize cached marker to empty + m = stbi__get_marker(z); + if (!stbi__SOI(m)) return stbi__err("no SOI","Corrupt JPEG"); + if (scan == STBI__SCAN_type) return 1; + m = stbi__get_marker(z); + while (!stbi__SOF(m)) { + if (!stbi__process_marker(z,m)) return 0; + m = stbi__get_marker(z); + while (m == STBI__MARKER_none) { + // some files have extra padding after their blocks, so ok, we'll scan + if (stbi__at_eof(z->s)) return stbi__err("no SOF", "Corrupt JPEG"); + m = stbi__get_marker(z); + } + } + z->progressive = stbi__SOF_progressive(m); + if (!stbi__process_frame_header(z, scan)) return 0; + return 1; +} + +// decode image to YCbCr format +static int stbi__decode_jpeg_image(stbi__jpeg *j) +{ + int m; + for (m = 0; m < 4; m++) { + j->img_comp[m].raw_data = NULL; + j->img_comp[m].raw_coeff = NULL; + } + j->restart_interval = 0; + if (!stbi__decode_jpeg_header(j, STBI__SCAN_load)) return 0; + m = stbi__get_marker(j); + while (!stbi__EOI(m)) { + if (stbi__SOS(m)) { + if (!stbi__process_scan_header(j)) return 0; + if (!stbi__parse_entropy_coded_data(j)) return 0; + if (j->marker == STBI__MARKER_none ) { + // handle 0s at the end of image data from IP Kamera 9060 + while (!stbi__at_eof(j->s)) { + int x = stbi__get8(j->s); + if (x == 255) { + j->marker = stbi__get8(j->s); + break; + } else if (x != 0) { + return stbi__err("junk before marker", "Corrupt JPEG"); + } + } + // if we reach eof without hitting a marker, stbi__get_marker() below will fail and we'll eventually return 0 + } + } else { + if (!stbi__process_marker(j, m)) return 0; + } + m = stbi__get_marker(j); + } + if (j->progressive) + stbi__jpeg_finish(j); + return 1; +} + +// static jfif-centered resampling (across block boundaries) + +typedef stbi_uc *(*resample_row_func)(stbi_uc *out, stbi_uc *in0, stbi_uc *in1, + int w, int hs); + +#define stbi__div4(x) ((stbi_uc) ((x) >> 2)) + +static stbi_uc *resample_row_1(stbi_uc *out, stbi_uc *in_near, stbi_uc *in_far, int w, int hs) +{ + STBI_NOTUSED(out); + STBI_NOTUSED(in_far); + STBI_NOTUSED(w); + STBI_NOTUSED(hs); + return in_near; +} + +static stbi_uc* stbi__resample_row_v_2(stbi_uc *out, stbi_uc *in_near, stbi_uc *in_far, int w, int hs) +{ + // need to generate two samples vertically for every one in input + int i; + STBI_NOTUSED(hs); + for (i=0; i < w; ++i) + out[i] = stbi__div4(3*in_near[i] + in_far[i] + 2); + return out; +} + +static stbi_uc* stbi__resample_row_h_2(stbi_uc *out, stbi_uc *in_near, stbi_uc *in_far, int w, int hs) +{ + // need to generate two samples horizontally for every one in input + int i; + stbi_uc *input = in_near; + + if (w == 1) { + // if only one sample, can't do any interpolation + out[0] = out[1] = input[0]; + return out; + } + + out[0] = input[0]; + out[1] = stbi__div4(input[0]*3 + input[1] + 2); + for (i=1; i < w-1; ++i) { + int n = 3*input[i]+2; + out[i*2+0] = stbi__div4(n+input[i-1]); + out[i*2+1] = stbi__div4(n+input[i+1]); + } + out[i*2+0] = stbi__div4(input[w-2]*3 + input[w-1] + 2); + out[i*2+1] = input[w-1]; + + STBI_NOTUSED(in_far); + STBI_NOTUSED(hs); + + return out; +} + +#define stbi__div16(x) ((stbi_uc) ((x) >> 4)) + +static stbi_uc *stbi__resample_row_hv_2(stbi_uc *out, stbi_uc *in_near, stbi_uc *in_far, int w, int hs) +{ + // need to generate 2x2 samples for every one in input + int i,t0,t1; + if (w == 1) { + out[0] = out[1] = stbi__div4(3*in_near[0] + in_far[0] + 2); + return out; + } + + t1 = 3*in_near[0] + in_far[0]; + out[0] = stbi__div4(t1+2); + for (i=1; i < w; ++i) { + t0 = t1; + t1 = 3*in_near[i]+in_far[i]; + out[i*2-1] = stbi__div16(3*t0 + t1 + 8); + out[i*2 ] = stbi__div16(3*t1 + t0 + 8); + } + out[w*2-1] = stbi__div4(t1+2); + + STBI_NOTUSED(hs); + + return out; +} + +#if defined(STBI_SSE2) || defined(STBI_NEON) +static stbi_uc *stbi__resample_row_hv_2_simd(stbi_uc *out, stbi_uc *in_near, stbi_uc *in_far, int w, int hs) +{ + // need to generate 2x2 samples for every one in input + int i=0,t0,t1; + + if (w == 1) { + out[0] = out[1] = stbi__div4(3*in_near[0] + in_far[0] + 2); + return out; + } + + t1 = 3*in_near[0] + in_far[0]; + // process groups of 8 pixels for as long as we can. + // note we can't handle the last pixel in a row in this loop + // because we need to handle the filter boundary conditions. + for (; i < ((w-1) & ~7); i += 8) { +#if defined(STBI_SSE2) + // load and perform the vertical filtering pass + // this uses 3*x + y = 4*x + (y - x) + __m128i zero = _mm_setzero_si128(); + __m128i farb = _mm_loadl_epi64((__m128i *) (in_far + i)); + __m128i nearb = _mm_loadl_epi64((__m128i *) (in_near + i)); + __m128i farw = _mm_unpacklo_epi8(farb, zero); + __m128i nearw = _mm_unpacklo_epi8(nearb, zero); + __m128i diff = _mm_sub_epi16(farw, nearw); + __m128i nears = _mm_slli_epi16(nearw, 2); + __m128i curr = _mm_add_epi16(nears, diff); // current row + + // horizontal filter works the same based on shifted vers of current + // row. "prev" is current row shifted right by 1 pixel; we need to + // insert the previous pixel value (from t1). + // "next" is current row shifted left by 1 pixel, with first pixel + // of next block of 8 pixels added in. + __m128i prv0 = _mm_slli_si128(curr, 2); + __m128i nxt0 = _mm_srli_si128(curr, 2); + __m128i prev = _mm_insert_epi16(prv0, t1, 0); + __m128i next = _mm_insert_epi16(nxt0, 3*in_near[i+8] + in_far[i+8], 7); + + // horizontal filter, polyphase implementation since it's convenient: + // even pixels = 3*cur + prev = cur*4 + (prev - cur) + // odd pixels = 3*cur + next = cur*4 + (next - cur) + // note the shared term. + __m128i bias = _mm_set1_epi16(8); + __m128i curs = _mm_slli_epi16(curr, 2); + __m128i prvd = _mm_sub_epi16(prev, curr); + __m128i nxtd = _mm_sub_epi16(next, curr); + __m128i curb = _mm_add_epi16(curs, bias); + __m128i even = _mm_add_epi16(prvd, curb); + __m128i odd = _mm_add_epi16(nxtd, curb); + + // interleave even and odd pixels, then undo scaling. + __m128i int0 = _mm_unpacklo_epi16(even, odd); + __m128i int1 = _mm_unpackhi_epi16(even, odd); + __m128i de0 = _mm_srli_epi16(int0, 4); + __m128i de1 = _mm_srli_epi16(int1, 4); + + // pack and write output + __m128i outv = _mm_packus_epi16(de0, de1); + _mm_storeu_si128((__m128i *) (out + i*2), outv); +#elif defined(STBI_NEON) + // load and perform the vertical filtering pass + // this uses 3*x + y = 4*x + (y - x) + uint8x8_t farb = vld1_u8(in_far + i); + uint8x8_t nearb = vld1_u8(in_near + i); + int16x8_t diff = vreinterpretq_s16_u16(vsubl_u8(farb, nearb)); + int16x8_t nears = vreinterpretq_s16_u16(vshll_n_u8(nearb, 2)); + int16x8_t curr = vaddq_s16(nears, diff); // current row + + // horizontal filter works the same based on shifted vers of current + // row. "prev" is current row shifted right by 1 pixel; we need to + // insert the previous pixel value (from t1). + // "next" is current row shifted left by 1 pixel, with first pixel + // of next block of 8 pixels added in. + int16x8_t prv0 = vextq_s16(curr, curr, 7); + int16x8_t nxt0 = vextq_s16(curr, curr, 1); + int16x8_t prev = vsetq_lane_s16(t1, prv0, 0); + int16x8_t next = vsetq_lane_s16(3*in_near[i+8] + in_far[i+8], nxt0, 7); + + // horizontal filter, polyphase implementation since it's convenient: + // even pixels = 3*cur + prev = cur*4 + (prev - cur) + // odd pixels = 3*cur + next = cur*4 + (next - cur) + // note the shared term. + int16x8_t curs = vshlq_n_s16(curr, 2); + int16x8_t prvd = vsubq_s16(prev, curr); + int16x8_t nxtd = vsubq_s16(next, curr); + int16x8_t even = vaddq_s16(curs, prvd); + int16x8_t odd = vaddq_s16(curs, nxtd); + + // undo scaling and round, then store with even/odd phases interleaved + uint8x8x2_t o; + o.val[0] = vqrshrun_n_s16(even, 4); + o.val[1] = vqrshrun_n_s16(odd, 4); + vst2_u8(out + i*2, o); +#endif + + // "previous" value for next iter + t1 = 3*in_near[i+7] + in_far[i+7]; + } + + t0 = t1; + t1 = 3*in_near[i] + in_far[i]; + out[i*2] = stbi__div16(3*t1 + t0 + 8); + + for (++i; i < w; ++i) { + t0 = t1; + t1 = 3*in_near[i]+in_far[i]; + out[i*2-1] = stbi__div16(3*t0 + t1 + 8); + out[i*2 ] = stbi__div16(3*t1 + t0 + 8); + } + out[w*2-1] = stbi__div4(t1+2); + + STBI_NOTUSED(hs); + + return out; +} +#endif + +static stbi_uc *stbi__resample_row_generic(stbi_uc *out, stbi_uc *in_near, stbi_uc *in_far, int w, int hs) +{ + // resample with nearest-neighbor + int i,j; + STBI_NOTUSED(in_far); + for (i=0; i < w; ++i) + for (j=0; j < hs; ++j) + out[i*hs+j] = in_near[i]; + return out; +} + +#ifdef STBI_JPEG_OLD +// this is the same YCbCr-to-RGB calculation that stb_image has used +// historically before the algorithm changes in 1.49 +#define float2fixed(x) ((int) ((x) * 65536 + 0.5)) +static void stbi__YCbCr_to_RGB_row(stbi_uc *out, const stbi_uc *y, const stbi_uc *pcb, const stbi_uc *pcr, int count, int step) +{ + int i; + for (i=0; i < count; ++i) { + int y_fixed = (y[i] << 16) + 32768; // rounding + int r,g,b; + int cr = pcr[i] - 128; + int cb = pcb[i] - 128; + r = y_fixed + cr*float2fixed(1.40200f); + g = y_fixed - cr*float2fixed(0.71414f) - cb*float2fixed(0.34414f); + b = y_fixed + cb*float2fixed(1.77200f); + r >>= 16; + g >>= 16; + b >>= 16; + if ((unsigned) r > 255) { if (r < 0) r = 0; else r = 255; } + if ((unsigned) g > 255) { if (g < 0) g = 0; else g = 255; } + if ((unsigned) b > 255) { if (b < 0) b = 0; else b = 255; } + out[0] = (stbi_uc)r; + out[1] = (stbi_uc)g; + out[2] = (stbi_uc)b; + out[3] = 255; + out += step; + } +} +#else +// this is a reduced-precision calculation of YCbCr-to-RGB introduced +// to make sure the code produces the same results in both SIMD and scalar +#define float2fixed(x) (((int) ((x) * 4096.0f + 0.5f)) << 8) +static void stbi__YCbCr_to_RGB_row(stbi_uc *out, const stbi_uc *y, const stbi_uc *pcb, const stbi_uc *pcr, int count, int step) +{ + int i; + for (i=0; i < count; ++i) { + int y_fixed = (y[i] << 20) + (1<<19); // rounding + int r,g,b; + int cr = pcr[i] - 128; + int cb = pcb[i] - 128; + r = y_fixed + cr* float2fixed(1.40200f); + g = y_fixed + (cr*-float2fixed(0.71414f)) + ((cb*-float2fixed(0.34414f)) & 0xffff0000); + b = y_fixed + cb* float2fixed(1.77200f); + r >>= 20; + g >>= 20; + b >>= 20; + if ((unsigned) r > 255) { if (r < 0) r = 0; else r = 255; } + if ((unsigned) g > 255) { if (g < 0) g = 0; else g = 255; } + if ((unsigned) b > 255) { if (b < 0) b = 0; else b = 255; } + out[0] = (stbi_uc)r; + out[1] = (stbi_uc)g; + out[2] = (stbi_uc)b; + out[3] = 255; + out += step; + } +} +#endif + +#if defined(STBI_SSE2) || defined(STBI_NEON) +static void stbi__YCbCr_to_RGB_simd(stbi_uc *out, stbi_uc const *y, stbi_uc const *pcb, stbi_uc const *pcr, int count, int step) +{ + int i = 0; + +#ifdef STBI_SSE2 + // step == 3 is pretty ugly on the final interleave, and i'm not convinced + // it's useful in practice (you wouldn't use it for textures, for example). + // so just accelerate step == 4 case. + if (step == 4) { + // this is a fairly straightforward implementation and not super-optimized. + __m128i signflip = _mm_set1_epi8(-0x80); + __m128i cr_const0 = _mm_set1_epi16( (short) ( 1.40200f*4096.0f+0.5f)); + __m128i cr_const1 = _mm_set1_epi16( - (short) ( 0.71414f*4096.0f+0.5f)); + __m128i cb_const0 = _mm_set1_epi16( - (short) ( 0.34414f*4096.0f+0.5f)); + __m128i cb_const1 = _mm_set1_epi16( (short) ( 1.77200f*4096.0f+0.5f)); + __m128i y_bias = _mm_set1_epi8((char) (unsigned char) 128); + __m128i xw = _mm_set1_epi16(255); // alpha channel + + for (; i+7 < count; i += 8) { + // load + __m128i y_bytes = _mm_loadl_epi64((__m128i *) (y+i)); + __m128i cr_bytes = _mm_loadl_epi64((__m128i *) (pcr+i)); + __m128i cb_bytes = _mm_loadl_epi64((__m128i *) (pcb+i)); + __m128i cr_biased = _mm_xor_si128(cr_bytes, signflip); // -128 + __m128i cb_biased = _mm_xor_si128(cb_bytes, signflip); // -128 + + // unpack to short (and left-shift cr, cb by 8) + __m128i yw = _mm_unpacklo_epi8(y_bias, y_bytes); + __m128i crw = _mm_unpacklo_epi8(_mm_setzero_si128(), cr_biased); + __m128i cbw = _mm_unpacklo_epi8(_mm_setzero_si128(), cb_biased); + + // color transform + __m128i yws = _mm_srli_epi16(yw, 4); + __m128i cr0 = _mm_mulhi_epi16(cr_const0, crw); + __m128i cb0 = _mm_mulhi_epi16(cb_const0, cbw); + __m128i cb1 = _mm_mulhi_epi16(cbw, cb_const1); + __m128i cr1 = _mm_mulhi_epi16(crw, cr_const1); + __m128i rws = _mm_add_epi16(cr0, yws); + __m128i gwt = _mm_add_epi16(cb0, yws); + __m128i bws = _mm_add_epi16(yws, cb1); + __m128i gws = _mm_add_epi16(gwt, cr1); + + // descale + __m128i rw = _mm_srai_epi16(rws, 4); + __m128i bw = _mm_srai_epi16(bws, 4); + __m128i gw = _mm_srai_epi16(gws, 4); + + // back to byte, set up for transpose + __m128i brb = _mm_packus_epi16(rw, bw); + __m128i gxb = _mm_packus_epi16(gw, xw); + + // transpose to interleave channels + __m128i t0 = _mm_unpacklo_epi8(brb, gxb); + __m128i t1 = _mm_unpackhi_epi8(brb, gxb); + __m128i o0 = _mm_unpacklo_epi16(t0, t1); + __m128i o1 = _mm_unpackhi_epi16(t0, t1); + + // store + _mm_storeu_si128((__m128i *) (out + 0), o0); + _mm_storeu_si128((__m128i *) (out + 16), o1); + out += 32; + } + } +#endif + +#ifdef STBI_NEON + // in this version, step=3 support would be easy to add. but is there demand? + if (step == 4) { + // this is a fairly straightforward implementation and not super-optimized. + uint8x8_t signflip = vdup_n_u8(0x80); + int16x8_t cr_const0 = vdupq_n_s16( (short) ( 1.40200f*4096.0f+0.5f)); + int16x8_t cr_const1 = vdupq_n_s16( - (short) ( 0.71414f*4096.0f+0.5f)); + int16x8_t cb_const0 = vdupq_n_s16( - (short) ( 0.34414f*4096.0f+0.5f)); + int16x8_t cb_const1 = vdupq_n_s16( (short) ( 1.77200f*4096.0f+0.5f)); + + for (; i+7 < count; i += 8) { + // load + uint8x8_t y_bytes = vld1_u8(y + i); + uint8x8_t cr_bytes = vld1_u8(pcr + i); + uint8x8_t cb_bytes = vld1_u8(pcb + i); + int8x8_t cr_biased = vreinterpret_s8_u8(vsub_u8(cr_bytes, signflip)); + int8x8_t cb_biased = vreinterpret_s8_u8(vsub_u8(cb_bytes, signflip)); + + // expand to s16 + int16x8_t yws = vreinterpretq_s16_u16(vshll_n_u8(y_bytes, 4)); + int16x8_t crw = vshll_n_s8(cr_biased, 7); + int16x8_t cbw = vshll_n_s8(cb_biased, 7); + + // color transform + int16x8_t cr0 = vqdmulhq_s16(crw, cr_const0); + int16x8_t cb0 = vqdmulhq_s16(cbw, cb_const0); + int16x8_t cr1 = vqdmulhq_s16(crw, cr_const1); + int16x8_t cb1 = vqdmulhq_s16(cbw, cb_const1); + int16x8_t rws = vaddq_s16(yws, cr0); + int16x8_t gws = vaddq_s16(vaddq_s16(yws, cb0), cr1); + int16x8_t bws = vaddq_s16(yws, cb1); + + // undo scaling, round, convert to byte + uint8x8x4_t o; + o.val[0] = vqrshrun_n_s16(rws, 4); + o.val[1] = vqrshrun_n_s16(gws, 4); + o.val[2] = vqrshrun_n_s16(bws, 4); + o.val[3] = vdup_n_u8(255); + + // store, interleaving r/g/b/a + vst4_u8(out, o); + out += 8*4; + } + } +#endif + + for (; i < count; ++i) { + int y_fixed = (y[i] << 20) + (1<<19); // rounding + int r,g,b; + int cr = pcr[i] - 128; + int cb = pcb[i] - 128; + r = y_fixed + cr* float2fixed(1.40200f); + g = y_fixed + cr*-float2fixed(0.71414f) + ((cb*-float2fixed(0.34414f)) & 0xffff0000); + b = y_fixed + cb* float2fixed(1.77200f); + r >>= 20; + g >>= 20; + b >>= 20; + if ((unsigned) r > 255) { if (r < 0) r = 0; else r = 255; } + if ((unsigned) g > 255) { if (g < 0) g = 0; else g = 255; } + if ((unsigned) b > 255) { if (b < 0) b = 0; else b = 255; } + out[0] = (stbi_uc)r; + out[1] = (stbi_uc)g; + out[2] = (stbi_uc)b; + out[3] = 255; + out += step; + } +} +#endif + +// set up the kernels +static void stbi__setup_jpeg(stbi__jpeg *j) +{ + j->idct_block_kernel = stbi__idct_block; + j->YCbCr_to_RGB_kernel = stbi__YCbCr_to_RGB_row; + j->resample_row_hv_2_kernel = stbi__resample_row_hv_2; + +#ifdef STBI_SSE2 + if (stbi__sse2_available()) { + j->idct_block_kernel = stbi__idct_simd; + #ifndef STBI_JPEG_OLD + j->YCbCr_to_RGB_kernel = stbi__YCbCr_to_RGB_simd; + #endif + j->resample_row_hv_2_kernel = stbi__resample_row_hv_2_simd; + } +#endif + +#ifdef STBI_NEON + j->idct_block_kernel = stbi__idct_simd; + #ifndef STBI_JPEG_OLD + j->YCbCr_to_RGB_kernel = stbi__YCbCr_to_RGB_simd; + #endif + j->resample_row_hv_2_kernel = stbi__resample_row_hv_2_simd; +#endif +} + +// clean up the temporary component buffers +static void stbi__cleanup_jpeg(stbi__jpeg *j) +{ + int i; + for (i=0; i < j->s->img_n; ++i) { + if (j->img_comp[i].raw_data) { + STBI_FREE(j->img_comp[i].raw_data); + j->img_comp[i].raw_data = NULL; + j->img_comp[i].data = NULL; + } + if (j->img_comp[i].raw_coeff) { + STBI_FREE(j->img_comp[i].raw_coeff); + j->img_comp[i].raw_coeff = 0; + j->img_comp[i].coeff = 0; + } + if (j->img_comp[i].linebuf) { + STBI_FREE(j->img_comp[i].linebuf); + j->img_comp[i].linebuf = NULL; + } + } +} + +typedef struct +{ + resample_row_func resample; + stbi_uc *line0,*line1; + int hs,vs; // expansion factor in each axis + int w_lores; // horizontal pixels pre-expansion + int ystep; // how far through vertical expansion we are + int ypos; // which pre-expansion row we're on +} stbi__resample; + +static stbi_uc *load_jpeg_image(stbi__jpeg *z, int *out_x, int *out_y, int *comp, int req_comp) +{ + int n, decode_n; + z->s->img_n = 0; // make stbi__cleanup_jpeg safe + + // validate req_comp + if (req_comp < 0 || req_comp > 4) return stbi__errpuc("bad req_comp", "Internal error"); + + // load a jpeg image from whichever source, but leave in YCbCr format + if (!stbi__decode_jpeg_image(z)) { stbi__cleanup_jpeg(z); return NULL; } + + // determine actual number of components to generate + n = req_comp ? req_comp : z->s->img_n; + + if (z->s->img_n == 3 && n < 3) + decode_n = 1; + else + decode_n = z->s->img_n; + + // resample and color-convert + { + int k; + unsigned int i,j; + stbi_uc *output; + stbi_uc *coutput[4]; + + stbi__resample res_comp[4]; + + for (k=0; k < decode_n; ++k) { + stbi__resample *r = &res_comp[k]; + + // allocate line buffer big enough for upsampling off the edges + // with upsample factor of 4 + z->img_comp[k].linebuf = (stbi_uc *) stbi__malloc(z->s->img_x + 3); + if (!z->img_comp[k].linebuf) { stbi__cleanup_jpeg(z); return stbi__errpuc("outofmem", "Out of memory"); } + + r->hs = z->img_h_max / z->img_comp[k].h; + r->vs = z->img_v_max / z->img_comp[k].v; + r->ystep = r->vs >> 1; + r->w_lores = (z->s->img_x + r->hs-1) / r->hs; + r->ypos = 0; + r->line0 = r->line1 = z->img_comp[k].data; + + if (r->hs == 1 && r->vs == 1) r->resample = resample_row_1; + else if (r->hs == 1 && r->vs == 2) r->resample = stbi__resample_row_v_2; + else if (r->hs == 2 && r->vs == 1) r->resample = stbi__resample_row_h_2; + else if (r->hs == 2 && r->vs == 2) r->resample = z->resample_row_hv_2_kernel; + else r->resample = stbi__resample_row_generic; + } + + // can't error after this so, this is safe + output = (stbi_uc *) stbi__malloc(n * z->s->img_x * z->s->img_y + 1); + if (!output) { stbi__cleanup_jpeg(z); return stbi__errpuc("outofmem", "Out of memory"); } + + // now go ahead and resample + for (j=0; j < z->s->img_y; ++j) { + stbi_uc *out = output + n * z->s->img_x * j; + for (k=0; k < decode_n; ++k) { + stbi__resample *r = &res_comp[k]; + int y_bot = r->ystep >= (r->vs >> 1); + coutput[k] = r->resample(z->img_comp[k].linebuf, + y_bot ? r->line1 : r->line0, + y_bot ? r->line0 : r->line1, + r->w_lores, r->hs); + if (++r->ystep >= r->vs) { + r->ystep = 0; + r->line0 = r->line1; + if (++r->ypos < z->img_comp[k].y) + r->line1 += z->img_comp[k].w2; + } + } + if (n >= 3) { + stbi_uc *y = coutput[0]; + if (z->s->img_n == 3) { + z->YCbCr_to_RGB_kernel(out, y, coutput[1], coutput[2], z->s->img_x, n); + } else + for (i=0; i < z->s->img_x; ++i) { + out[0] = out[1] = out[2] = y[i]; + out[3] = 255; // not used if n==3 + out += n; + } + } else { + stbi_uc *y = coutput[0]; + if (n == 1) + for (i=0; i < z->s->img_x; ++i) out[i] = y[i]; + else + for (i=0; i < z->s->img_x; ++i) *out++ = y[i], *out++ = 255; + } + } + stbi__cleanup_jpeg(z); + *out_x = z->s->img_x; + *out_y = z->s->img_y; + if (comp) *comp = z->s->img_n; // report original components, not output + return output; + } +} + +static unsigned char *stbi__jpeg_load(stbi__context *s, int *x, int *y, int *comp, int req_comp) +{ + stbi__jpeg j; + j.s = s; + stbi__setup_jpeg(&j); + return load_jpeg_image(&j, x,y,comp,req_comp); +} + +static int stbi__jpeg_test(stbi__context *s) +{ + int r; + stbi__jpeg j; + j.s = s; + stbi__setup_jpeg(&j); + r = stbi__decode_jpeg_header(&j, STBI__SCAN_type); + stbi__rewind(s); + return r; +} + +static int stbi__jpeg_info_raw(stbi__jpeg *j, int *x, int *y, int *comp) +{ + if (!stbi__decode_jpeg_header(j, STBI__SCAN_header)) { + stbi__rewind( j->s ); + return 0; + } + if (x) *x = j->s->img_x; + if (y) *y = j->s->img_y; + if (comp) *comp = j->s->img_n; + return 1; +} + +static int stbi__jpeg_info(stbi__context *s, int *x, int *y, int *comp) +{ + stbi__jpeg j; + j.s = s; + return stbi__jpeg_info_raw(&j, x, y, comp); +} +#endif + +// public domain zlib decode v0.2 Sean Barrett 2006-11-18 +// simple implementation +// - all input must be provided in an upfront buffer +// - all output is written to a single output buffer (can malloc/realloc) +// performance +// - fast huffman + +#ifndef STBI_NO_ZLIB + +// fast-way is faster to check than jpeg huffman, but slow way is slower +#define STBI__ZFAST_BITS 9 // accelerate all cases in default tables +#define STBI__ZFAST_MASK ((1 << STBI__ZFAST_BITS) - 1) + +// zlib-style huffman encoding +// (jpegs packs from left, zlib from right, so can't share code) +typedef struct +{ + stbi__uint16 fast[1 << STBI__ZFAST_BITS]; + stbi__uint16 firstcode[16]; + int maxcode[17]; + stbi__uint16 firstsymbol[16]; + stbi_uc size[288]; + stbi__uint16 value[288]; +} stbi__zhuffman; + +stbi_inline static int stbi__bitreverse16(int n) +{ + n = ((n & 0xAAAA) >> 1) | ((n & 0x5555) << 1); + n = ((n & 0xCCCC) >> 2) | ((n & 0x3333) << 2); + n = ((n & 0xF0F0) >> 4) | ((n & 0x0F0F) << 4); + n = ((n & 0xFF00) >> 8) | ((n & 0x00FF) << 8); + return n; +} + +stbi_inline static int stbi__bit_reverse(int v, int bits) +{ + STBI_ASSERT(bits <= 16); + // to bit reverse n bits, reverse 16 and shift + // e.g. 11 bits, bit reverse and shift away 5 + return stbi__bitreverse16(v) >> (16-bits); +} + +static int stbi__zbuild_huffman(stbi__zhuffman *z, stbi_uc *sizelist, int num) +{ + int i,k=0; + int code, next_code[16], sizes[17]; + + // DEFLATE spec for generating codes + memset(sizes, 0, sizeof(sizes)); + memset(z->fast, 0, sizeof(z->fast)); + for (i=0; i < num; ++i) + ++sizes[sizelist[i]]; + sizes[0] = 0; + for (i=1; i < 16; ++i) + if (sizes[i] > (1 << i)) + return stbi__err("bad sizes", "Corrupt PNG"); + code = 0; + for (i=1; i < 16; ++i) { + next_code[i] = code; + z->firstcode[i] = (stbi__uint16) code; + z->firstsymbol[i] = (stbi__uint16) k; + code = (code + sizes[i]); + if (sizes[i]) + if (code-1 >= (1 << i)) return stbi__err("bad codelengths","Corrupt PNG"); + z->maxcode[i] = code << (16-i); // preshift for inner loop + code <<= 1; + k += sizes[i]; + } + z->maxcode[16] = 0x10000; // sentinel + for (i=0; i < num; ++i) { + int s = sizelist[i]; + if (s) { + int c = next_code[s] - z->firstcode[s] + z->firstsymbol[s]; + stbi__uint16 fastv = (stbi__uint16) ((s << 9) | i); + z->size [c] = (stbi_uc ) s; + z->value[c] = (stbi__uint16) i; + if (s <= STBI__ZFAST_BITS) { + int j = stbi__bit_reverse(next_code[s],s); + while (j < (1 << STBI__ZFAST_BITS)) { + z->fast[j] = fastv; + j += (1 << s); + } + } + ++next_code[s]; + } + } + return 1; +} + +// zlib-from-memory implementation for PNG reading +// because PNG allows splitting the zlib stream arbitrarily, +// and it's annoying structurally to have PNG call ZLIB call PNG, +// we require PNG read all the IDATs and combine them into a single +// memory buffer + +typedef struct +{ + stbi_uc *zbuffer, *zbuffer_end; + int num_bits; + stbi__uint32 code_buffer; + + char *zout; + char *zout_start; + char *zout_end; + int z_expandable; + + stbi__zhuffman z_length, z_distance; +} stbi__zbuf; + +stbi_inline static stbi_uc stbi__zget8(stbi__zbuf *z) +{ + if (z->zbuffer >= z->zbuffer_end) return 0; + return *z->zbuffer++; +} + +static void stbi__fill_bits(stbi__zbuf *z) +{ + do { + STBI_ASSERT(z->code_buffer < (1U << z->num_bits)); + z->code_buffer |= (unsigned int) stbi__zget8(z) << z->num_bits; + z->num_bits += 8; + } while (z->num_bits <= 24); +} + +stbi_inline static unsigned int stbi__zreceive(stbi__zbuf *z, int n) +{ + unsigned int k; + if (z->num_bits < n) stbi__fill_bits(z); + k = z->code_buffer & ((1 << n) - 1); + z->code_buffer >>= n; + z->num_bits -= n; + return k; +} + +static int stbi__zhuffman_decode_slowpath(stbi__zbuf *a, stbi__zhuffman *z) +{ + int b,s,k; + // not resolved by fast table, so compute it the slow way + // use jpeg approach, which requires MSbits at top + k = stbi__bit_reverse(a->code_buffer, 16); + for (s=STBI__ZFAST_BITS+1; ; ++s) + if (k < z->maxcode[s]) + break; + if (s == 16) return -1; // invalid code! + // code size is s, so: + b = (k >> (16-s)) - z->firstcode[s] + z->firstsymbol[s]; + STBI_ASSERT(z->size[b] == s); + a->code_buffer >>= s; + a->num_bits -= s; + return z->value[b]; +} + +stbi_inline static int stbi__zhuffman_decode(stbi__zbuf *a, stbi__zhuffman *z) +{ + int b,s; + if (a->num_bits < 16) stbi__fill_bits(a); + b = z->fast[a->code_buffer & STBI__ZFAST_MASK]; + if (b) { + s = b >> 9; + a->code_buffer >>= s; + a->num_bits -= s; + return b & 511; + } + return stbi__zhuffman_decode_slowpath(a, z); +} + +static int stbi__zexpand(stbi__zbuf *z, char *zout, int n) // need to make room for n bytes +{ + char *q; + int cur, limit, old_limit; + z->zout = zout; + if (!z->z_expandable) return stbi__err("output buffer limit","Corrupt PNG"); + cur = (int) (z->zout - z->zout_start); + limit = old_limit = (int) (z->zout_end - z->zout_start); + while (cur + n > limit) + limit *= 2; + q = (char *) STBI_REALLOC_SIZED(z->zout_start, old_limit, limit); + STBI_NOTUSED(old_limit); + if (q == NULL) return stbi__err("outofmem", "Out of memory"); + z->zout_start = q; + z->zout = q + cur; + z->zout_end = q + limit; + return 1; +} + +static int stbi__zlength_base[31] = { + 3,4,5,6,7,8,9,10,11,13, + 15,17,19,23,27,31,35,43,51,59, + 67,83,99,115,131,163,195,227,258,0,0 }; + +static int stbi__zlength_extra[31]= +{ 0,0,0,0,0,0,0,0,1,1,1,1,2,2,2,2,3,3,3,3,4,4,4,4,5,5,5,5,0,0,0 }; + +static int stbi__zdist_base[32] = { 1,2,3,4,5,7,9,13,17,25,33,49,65,97,129,193, +257,385,513,769,1025,1537,2049,3073,4097,6145,8193,12289,16385,24577,0,0}; + +static int stbi__zdist_extra[32] = +{ 0,0,0,0,1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,11,11,12,12,13,13}; + +static int stbi__parse_huffman_block(stbi__zbuf *a) +{ + char *zout = a->zout; + for(;;) { + int z = stbi__zhuffman_decode(a, &a->z_length); + if (z < 256) { + if (z < 0) return stbi__err("bad huffman code","Corrupt PNG"); // error in huffman codes + if (zout >= a->zout_end) { + if (!stbi__zexpand(a, zout, 1)) return 0; + zout = a->zout; + } + *zout++ = (char) z; + } else { + stbi_uc *p; + int len,dist; + if (z == 256) { + a->zout = zout; + return 1; + } + z -= 257; + len = stbi__zlength_base[z]; + if (stbi__zlength_extra[z]) len += stbi__zreceive(a, stbi__zlength_extra[z]); + z = stbi__zhuffman_decode(a, &a->z_distance); + if (z < 0) return stbi__err("bad huffman code","Corrupt PNG"); + dist = stbi__zdist_base[z]; + if (stbi__zdist_extra[z]) dist += stbi__zreceive(a, stbi__zdist_extra[z]); + if (zout - a->zout_start < dist) return stbi__err("bad dist","Corrupt PNG"); + if (zout + len > a->zout_end) { + if (!stbi__zexpand(a, zout, len)) return 0; + zout = a->zout; + } + p = (stbi_uc *) (zout - dist); + if (dist == 1) { // run of one byte; common in images. + stbi_uc v = *p; + if (len) { do *zout++ = v; while (--len); } + } else { + if (len) { do *zout++ = *p++; while (--len); } + } + } + } +} + +static int stbi__compute_huffman_codes(stbi__zbuf *a) +{ + static stbi_uc length_dezigzag[19] = { 16,17,18,0,8,7,9,6,10,5,11,4,12,3,13,2,14,1,15 }; + stbi__zhuffman z_codelength; + stbi_uc lencodes[286+32+137];//padding for maximum single op + stbi_uc codelength_sizes[19]; + int i,n; + + int hlit = stbi__zreceive(a,5) + 257; + int hdist = stbi__zreceive(a,5) + 1; + int hclen = stbi__zreceive(a,4) + 4; + + memset(codelength_sizes, 0, sizeof(codelength_sizes)); + for (i=0; i < hclen; ++i) { + int s = stbi__zreceive(a,3); + codelength_sizes[length_dezigzag[i]] = (stbi_uc) s; + } + if (!stbi__zbuild_huffman(&z_codelength, codelength_sizes, 19)) return 0; + + n = 0; + while (n < hlit + hdist) { + int c = stbi__zhuffman_decode(a, &z_codelength); + if (c < 0 || c >= 19) return stbi__err("bad codelengths", "Corrupt PNG"); + if (c < 16) + lencodes[n++] = (stbi_uc) c; + else if (c == 16) { + c = stbi__zreceive(a,2)+3; + memset(lencodes+n, lencodes[n-1], c); + n += c; + } else if (c == 17) { + c = stbi__zreceive(a,3)+3; + memset(lencodes+n, 0, c); + n += c; + } else { + STBI_ASSERT(c == 18); + c = stbi__zreceive(a,7)+11; + memset(lencodes+n, 0, c); + n += c; + } + } + if (n != hlit+hdist) return stbi__err("bad codelengths","Corrupt PNG"); + if (!stbi__zbuild_huffman(&a->z_length, lencodes, hlit)) return 0; + if (!stbi__zbuild_huffman(&a->z_distance, lencodes+hlit, hdist)) return 0; + return 1; +} + +static int stbi__parse_uncomperssed_block(stbi__zbuf *a) +{ + stbi_uc header[4]; + int len,nlen,k; + if (a->num_bits & 7) + stbi__zreceive(a, a->num_bits & 7); // discard + // drain the bit-packed data into header + k = 0; + while (a->num_bits > 0) { + header[k++] = (stbi_uc) (a->code_buffer & 255); // suppress MSVC run-time check + a->code_buffer >>= 8; + a->num_bits -= 8; + } + STBI_ASSERT(a->num_bits == 0); + // now fill header the normal way + while (k < 4) + header[k++] = stbi__zget8(a); + len = header[1] * 256 + header[0]; + nlen = header[3] * 256 + header[2]; + if (nlen != (len ^ 0xffff)) return stbi__err("zlib corrupt","Corrupt PNG"); + if (a->zbuffer + len > a->zbuffer_end) return stbi__err("read past buffer","Corrupt PNG"); + if (a->zout + len > a->zout_end) + if (!stbi__zexpand(a, a->zout, len)) return 0; + memcpy(a->zout, a->zbuffer, len); + a->zbuffer += len; + a->zout += len; + return 1; +} + +static int stbi__parse_zlib_header(stbi__zbuf *a) +{ + int cmf = stbi__zget8(a); + int cm = cmf & 15; + /* int cinfo = cmf >> 4; */ + int flg = stbi__zget8(a); + if ((cmf*256+flg) % 31 != 0) return stbi__err("bad zlib header","Corrupt PNG"); // zlib spec + if (flg & 32) return stbi__err("no preset dict","Corrupt PNG"); // preset dictionary not allowed in png + if (cm != 8) return stbi__err("bad compression","Corrupt PNG"); // DEFLATE required for png + // window = 1 << (8 + cinfo)... but who cares, we fully buffer output + return 1; +} + +// @TODO: should statically initialize these for optimal thread safety +static stbi_uc stbi__zdefault_length[288], stbi__zdefault_distance[32]; +static void stbi__init_zdefaults(void) +{ + int i; // use <= to match clearly with spec + for (i=0; i <= 143; ++i) stbi__zdefault_length[i] = 8; + for ( ; i <= 255; ++i) stbi__zdefault_length[i] = 9; + for ( ; i <= 279; ++i) stbi__zdefault_length[i] = 7; + for ( ; i <= 287; ++i) stbi__zdefault_length[i] = 8; + + for (i=0; i <= 31; ++i) stbi__zdefault_distance[i] = 5; +} + +static int stbi__parse_zlib(stbi__zbuf *a, int parse_header) +{ + int final, type; + if (parse_header) + if (!stbi__parse_zlib_header(a)) return 0; + a->num_bits = 0; + a->code_buffer = 0; + do { + final = stbi__zreceive(a,1); + type = stbi__zreceive(a,2); + if (type == 0) { + if (!stbi__parse_uncomperssed_block(a)) return 0; + } else if (type == 3) { + return 0; + } else { + if (type == 1) { + // use fixed code lengths + if (!stbi__zdefault_distance[31]) stbi__init_zdefaults(); + if (!stbi__zbuild_huffman(&a->z_length , stbi__zdefault_length , 288)) return 0; + if (!stbi__zbuild_huffman(&a->z_distance, stbi__zdefault_distance, 32)) return 0; + } else { + if (!stbi__compute_huffman_codes(a)) return 0; + } + if (!stbi__parse_huffman_block(a)) return 0; + } + } while (!final); + return 1; +} + +static int stbi__do_zlib(stbi__zbuf *a, char *obuf, int olen, int exp, int parse_header) +{ + a->zout_start = obuf; + a->zout = obuf; + a->zout_end = obuf + olen; + a->z_expandable = exp; + + return stbi__parse_zlib(a, parse_header); +} + +STBIDEF char *stbi_zlib_decode_malloc_guesssize(const char *buffer, int len, int initial_size, int *outlen) +{ + stbi__zbuf a; + char *p = (char *) stbi__malloc(initial_size); + if (p == NULL) return NULL; + a.zbuffer = (stbi_uc *) buffer; + a.zbuffer_end = (stbi_uc *) buffer + len; + if (stbi__do_zlib(&a, p, initial_size, 1, 1)) { + if (outlen) *outlen = (int) (a.zout - a.zout_start); + return a.zout_start; + } else { + STBI_FREE(a.zout_start); + return NULL; + } +} + +STBIDEF char *stbi_zlib_decode_malloc(char const *buffer, int len, int *outlen) +{ + return stbi_zlib_decode_malloc_guesssize(buffer, len, 16384, outlen); +} + +STBIDEF char *stbi_zlib_decode_malloc_guesssize_headerflag(const char *buffer, int len, int initial_size, int *outlen, int parse_header) +{ + stbi__zbuf a; + char *p = (char *) stbi__malloc(initial_size); + if (p == NULL) return NULL; + a.zbuffer = (stbi_uc *) buffer; + a.zbuffer_end = (stbi_uc *) buffer + len; + if (stbi__do_zlib(&a, p, initial_size, 1, parse_header)) { + if (outlen) *outlen = (int) (a.zout - a.zout_start); + return a.zout_start; + } else { + STBI_FREE(a.zout_start); + return NULL; + } +} + +STBIDEF int stbi_zlib_decode_buffer(char *obuffer, int olen, char const *ibuffer, int ilen) +{ + stbi__zbuf a; + a.zbuffer = (stbi_uc *) ibuffer; + a.zbuffer_end = (stbi_uc *) ibuffer + ilen; + if (stbi__do_zlib(&a, obuffer, olen, 0, 1)) + return (int) (a.zout - a.zout_start); + else + return -1; +} + +STBIDEF char *stbi_zlib_decode_noheader_malloc(char const *buffer, int len, int *outlen) +{ + stbi__zbuf a; + char *p = (char *) stbi__malloc(16384); + if (p == NULL) return NULL; + a.zbuffer = (stbi_uc *) buffer; + a.zbuffer_end = (stbi_uc *) buffer+len; + if (stbi__do_zlib(&a, p, 16384, 1, 0)) { + if (outlen) *outlen = (int) (a.zout - a.zout_start); + return a.zout_start; + } else { + STBI_FREE(a.zout_start); + return NULL; + } +} + +STBIDEF int stbi_zlib_decode_noheader_buffer(char *obuffer, int olen, const char *ibuffer, int ilen) +{ + stbi__zbuf a; + a.zbuffer = (stbi_uc *) ibuffer; + a.zbuffer_end = (stbi_uc *) ibuffer + ilen; + if (stbi__do_zlib(&a, obuffer, olen, 0, 0)) + return (int) (a.zout - a.zout_start); + else + return -1; +} +#endif + +// public domain "baseline" PNG decoder v0.10 Sean Barrett 2006-11-18 +// simple implementation +// - only 8-bit samples +// - no CRC checking +// - allocates lots of intermediate memory +// - avoids problem of streaming data between subsystems +// - avoids explicit window management +// performance +// - uses stb_zlib, a PD zlib implementation with fast huffman decoding + +#ifndef STBI_NO_PNG +typedef struct +{ + stbi__uint32 length; + stbi__uint32 type; +} stbi__pngchunk; + +static stbi__pngchunk stbi__get_chunk_header(stbi__context *s) +{ + stbi__pngchunk c; + c.length = stbi__get32be(s); + c.type = stbi__get32be(s); + return c; +} + +static int stbi__check_png_header(stbi__context *s) +{ + static stbi_uc png_sig[8] = { 137,80,78,71,13,10,26,10 }; + int i; + for (i=0; i < 8; ++i) + if (stbi__get8(s) != png_sig[i]) return stbi__err("bad png sig","Not a PNG"); + return 1; +} + +typedef struct +{ + stbi__context *s; + stbi_uc *idata, *expanded, *out; +} stbi__png; + + +enum { + STBI__F_none=0, + STBI__F_sub=1, + STBI__F_up=2, + STBI__F_avg=3, + STBI__F_paeth=4, + // synthetic filters used for first scanline to avoid needing a dummy row of 0s + STBI__F_avg_first, + STBI__F_paeth_first +}; + +static stbi_uc first_row_filter[5] = +{ + STBI__F_none, + STBI__F_sub, + STBI__F_none, + STBI__F_avg_first, + STBI__F_paeth_first +}; + +static int stbi__paeth(int a, int b, int c) +{ + int p = a + b - c; + int pa = abs(p-a); + int pb = abs(p-b); + int pc = abs(p-c); + if (pa <= pb && pa <= pc) return a; + if (pb <= pc) return b; + return c; +} + +static stbi_uc stbi__depth_scale_table[9] = { 0, 0xff, 0x55, 0, 0x11, 0,0,0, 0x01 }; + +// create the png data from post-deflated data +static int stbi__create_png_image_raw(stbi__png *a, stbi_uc *raw, stbi__uint32 raw_len, int out_n, stbi__uint32 x, stbi__uint32 y, int depth, int color) +{ + stbi__context *s = a->s; + stbi__uint32 i,j,stride = x*out_n; + stbi__uint32 img_len, img_width_bytes; + int k; + int img_n = s->img_n; // copy it into a local for later + + STBI_ASSERT(out_n == s->img_n || out_n == s->img_n+1); + a->out = (stbi_uc *) stbi__malloc(x * y * out_n); // extra bytes to write off the end into + if (!a->out) return stbi__err("outofmem", "Out of memory"); + + img_width_bytes = (((img_n * x * depth) + 7) >> 3); + img_len = (img_width_bytes + 1) * y; + if (s->img_x == x && s->img_y == y) { + if (raw_len != img_len) return stbi__err("not enough pixels","Corrupt PNG"); + } else { // interlaced: + if (raw_len < img_len) return stbi__err("not enough pixels","Corrupt PNG"); + } + + for (j=0; j < y; ++j) { + stbi_uc *cur = a->out + stride*j; + stbi_uc *prior = cur - stride; + int filter = *raw++; + int filter_bytes = img_n; + int width = x; + if (filter > 4) + return stbi__err("invalid filter","Corrupt PNG"); + + if (depth < 8) { + STBI_ASSERT(img_width_bytes <= x); + cur += x*out_n - img_width_bytes; // store output to the rightmost img_len bytes, so we can decode in place + filter_bytes = 1; + width = img_width_bytes; + } + + // if first row, use special filter that doesn't sample previous row + if (j == 0) filter = first_row_filter[filter]; + + // handle first byte explicitly + for (k=0; k < filter_bytes; ++k) { + switch (filter) { + case STBI__F_none : cur[k] = raw[k]; break; + case STBI__F_sub : cur[k] = raw[k]; break; + case STBI__F_up : cur[k] = STBI__BYTECAST(raw[k] + prior[k]); break; + case STBI__F_avg : cur[k] = STBI__BYTECAST(raw[k] + (prior[k]>>1)); break; + case STBI__F_paeth : cur[k] = STBI__BYTECAST(raw[k] + stbi__paeth(0,prior[k],0)); break; + case STBI__F_avg_first : cur[k] = raw[k]; break; + case STBI__F_paeth_first: cur[k] = raw[k]; break; + } + } + + if (depth == 8) { + if (img_n != out_n) + cur[img_n] = 255; // first pixel + raw += img_n; + cur += out_n; + prior += out_n; + } else { + raw += 1; + cur += 1; + prior += 1; + } + + // this is a little gross, so that we don't switch per-pixel or per-component + if (depth < 8 || img_n == out_n) { + int nk = (width - 1)*img_n; + #define CASE(f) \ + case f: \ + for (k=0; k < nk; ++k) + switch (filter) { + // "none" filter turns into a memcpy here; make that explicit. + case STBI__F_none: memcpy(cur, raw, nk); break; + CASE(STBI__F_sub) cur[k] = STBI__BYTECAST(raw[k] + cur[k-filter_bytes]); break; + CASE(STBI__F_up) cur[k] = STBI__BYTECAST(raw[k] + prior[k]); break; + CASE(STBI__F_avg) cur[k] = STBI__BYTECAST(raw[k] + ((prior[k] + cur[k-filter_bytes])>>1)); break; + CASE(STBI__F_paeth) cur[k] = STBI__BYTECAST(raw[k] + stbi__paeth(cur[k-filter_bytes],prior[k],prior[k-filter_bytes])); break; + CASE(STBI__F_avg_first) cur[k] = STBI__BYTECAST(raw[k] + (cur[k-filter_bytes] >> 1)); break; + CASE(STBI__F_paeth_first) cur[k] = STBI__BYTECAST(raw[k] + stbi__paeth(cur[k-filter_bytes],0,0)); break; + } + #undef CASE + raw += nk; + } else { + STBI_ASSERT(img_n+1 == out_n); + #define CASE(f) \ + case f: \ + for (i=x-1; i >= 1; --i, cur[img_n]=255,raw+=img_n,cur+=out_n,prior+=out_n) \ + for (k=0; k < img_n; ++k) + switch (filter) { + CASE(STBI__F_none) cur[k] = raw[k]; break; + CASE(STBI__F_sub) cur[k] = STBI__BYTECAST(raw[k] + cur[k-out_n]); break; + CASE(STBI__F_up) cur[k] = STBI__BYTECAST(raw[k] + prior[k]); break; + CASE(STBI__F_avg) cur[k] = STBI__BYTECAST(raw[k] + ((prior[k] + cur[k-out_n])>>1)); break; + CASE(STBI__F_paeth) cur[k] = STBI__BYTECAST(raw[k] + stbi__paeth(cur[k-out_n],prior[k],prior[k-out_n])); break; + CASE(STBI__F_avg_first) cur[k] = STBI__BYTECAST(raw[k] + (cur[k-out_n] >> 1)); break; + CASE(STBI__F_paeth_first) cur[k] = STBI__BYTECAST(raw[k] + stbi__paeth(cur[k-out_n],0,0)); break; + } + #undef CASE + } + } + + // we make a separate pass to expand bits to pixels; for performance, + // this could run two scanlines behind the above code, so it won't + // intefere with filtering but will still be in the cache. + if (depth < 8) { + for (j=0; j < y; ++j) { + stbi_uc *cur = a->out + stride*j; + stbi_uc *in = a->out + stride*j + x*out_n - img_width_bytes; + // unpack 1/2/4-bit into a 8-bit buffer. allows us to keep the common 8-bit path optimal at minimal cost for 1/2/4-bit + // png guarante byte alignment, if width is not multiple of 8/4/2 we'll decode dummy trailing data that will be skipped in the later loop + stbi_uc scale = (color == 0) ? stbi__depth_scale_table[depth] : 1; // scale grayscale values to 0..255 range + + // note that the final byte might overshoot and write more data than desired. + // we can allocate enough data that this never writes out of memory, but it + // could also overwrite the next scanline. can it overwrite non-empty data + // on the next scanline? yes, consider 1-pixel-wide scanlines with 1-bit-per-pixel. + // so we need to explicitly clamp the final ones + + if (depth == 4) { + for (k=x*img_n; k >= 2; k-=2, ++in) { + *cur++ = scale * ((*in >> 4) ); + *cur++ = scale * ((*in ) & 0x0f); + } + if (k > 0) *cur++ = scale * ((*in >> 4) ); + } else if (depth == 2) { + for (k=x*img_n; k >= 4; k-=4, ++in) { + *cur++ = scale * ((*in >> 6) ); + *cur++ = scale * ((*in >> 4) & 0x03); + *cur++ = scale * ((*in >> 2) & 0x03); + *cur++ = scale * ((*in ) & 0x03); + } + if (k > 0) *cur++ = scale * ((*in >> 6) ); + if (k > 1) *cur++ = scale * ((*in >> 4) & 0x03); + if (k > 2) *cur++ = scale * ((*in >> 2) & 0x03); + } else if (depth == 1) { + for (k=x*img_n; k >= 8; k-=8, ++in) { + *cur++ = scale * ((*in >> 7) ); + *cur++ = scale * ((*in >> 6) & 0x01); + *cur++ = scale * ((*in >> 5) & 0x01); + *cur++ = scale * ((*in >> 4) & 0x01); + *cur++ = scale * ((*in >> 3) & 0x01); + *cur++ = scale * ((*in >> 2) & 0x01); + *cur++ = scale * ((*in >> 1) & 0x01); + *cur++ = scale * ((*in ) & 0x01); + } + if (k > 0) *cur++ = scale * ((*in >> 7) ); + if (k > 1) *cur++ = scale * ((*in >> 6) & 0x01); + if (k > 2) *cur++ = scale * ((*in >> 5) & 0x01); + if (k > 3) *cur++ = scale * ((*in >> 4) & 0x01); + if (k > 4) *cur++ = scale * ((*in >> 3) & 0x01); + if (k > 5) *cur++ = scale * ((*in >> 2) & 0x01); + if (k > 6) *cur++ = scale * ((*in >> 1) & 0x01); + } + if (img_n != out_n) { + int q; + // insert alpha = 255 + cur = a->out + stride*j; + if (img_n == 1) { + for (q=x-1; q >= 0; --q) { + cur[q*2+1] = 255; + cur[q*2+0] = cur[q]; + } + } else { + STBI_ASSERT(img_n == 3); + for (q=x-1; q >= 0; --q) { + cur[q*4+3] = 255; + cur[q*4+2] = cur[q*3+2]; + cur[q*4+1] = cur[q*3+1]; + cur[q*4+0] = cur[q*3+0]; + } + } + } + } + } + + return 1; +} + +static int stbi__create_png_image(stbi__png *a, stbi_uc *image_data, stbi__uint32 image_data_len, int out_n, int depth, int color, int interlaced) +{ + stbi_uc *final; + int p; + if (!interlaced) + return stbi__create_png_image_raw(a, image_data, image_data_len, out_n, a->s->img_x, a->s->img_y, depth, color); + + // de-interlacing + final = (stbi_uc *) stbi__malloc(a->s->img_x * a->s->img_y * out_n); + for (p=0; p < 7; ++p) { + int xorig[] = { 0,4,0,2,0,1,0 }; + int yorig[] = { 0,0,4,0,2,0,1 }; + int xspc[] = { 8,8,4,4,2,2,1 }; + int yspc[] = { 8,8,8,4,4,2,2 }; + int i,j,x,y; + // pass1_x[4] = 0, pass1_x[5] = 1, pass1_x[12] = 1 + x = (a->s->img_x - xorig[p] + xspc[p]-1) / xspc[p]; + y = (a->s->img_y - yorig[p] + yspc[p]-1) / yspc[p]; + if (x && y) { + stbi__uint32 img_len = ((((a->s->img_n * x * depth) + 7) >> 3) + 1) * y; + if (!stbi__create_png_image_raw(a, image_data, image_data_len, out_n, x, y, depth, color)) { + STBI_FREE(final); + return 0; + } + for (j=0; j < y; ++j) { + for (i=0; i < x; ++i) { + int out_y = j*yspc[p]+yorig[p]; + int out_x = i*xspc[p]+xorig[p]; + memcpy(final + out_y*a->s->img_x*out_n + out_x*out_n, + a->out + (j*x+i)*out_n, out_n); + } + } + STBI_FREE(a->out); + image_data += img_len; + image_data_len -= img_len; + } + } + a->out = final; + + return 1; +} + +static int stbi__compute_transparency(stbi__png *z, stbi_uc tc[3], int out_n) +{ + stbi__context *s = z->s; + stbi__uint32 i, pixel_count = s->img_x * s->img_y; + stbi_uc *p = z->out; + + // compute color-based transparency, assuming we've + // already got 255 as the alpha value in the output + STBI_ASSERT(out_n == 2 || out_n == 4); + + if (out_n == 2) { + for (i=0; i < pixel_count; ++i) { + p[1] = (p[0] == tc[0] ? 0 : 255); + p += 2; + } + } else { + for (i=0; i < pixel_count; ++i) { + if (p[0] == tc[0] && p[1] == tc[1] && p[2] == tc[2]) + p[3] = 0; + p += 4; + } + } + return 1; +} + +static int stbi__expand_png_palette(stbi__png *a, stbi_uc *palette, int len, int pal_img_n) +{ + stbi__uint32 i, pixel_count = a->s->img_x * a->s->img_y; + stbi_uc *p, *temp_out, *orig = a->out; + + p = (stbi_uc *) stbi__malloc(pixel_count * pal_img_n); + if (p == NULL) return stbi__err("outofmem", "Out of memory"); + + // between here and free(out) below, exitting would leak + temp_out = p; + + if (pal_img_n == 3) { + for (i=0; i < pixel_count; ++i) { + int n = orig[i]*4; + p[0] = palette[n ]; + p[1] = palette[n+1]; + p[2] = palette[n+2]; + p += 3; + } + } else { + for (i=0; i < pixel_count; ++i) { + int n = orig[i]*4; + p[0] = palette[n ]; + p[1] = palette[n+1]; + p[2] = palette[n+2]; + p[3] = palette[n+3]; + p += 4; + } + } + STBI_FREE(a->out); + a->out = temp_out; + + STBI_NOTUSED(len); + + return 1; +} + +static int stbi__unpremultiply_on_load = 0; +static int stbi__de_iphone_flag = 0; + +STBIDEF void stbi_set_unpremultiply_on_load(int flag_true_if_should_unpremultiply) +{ + stbi__unpremultiply_on_load = flag_true_if_should_unpremultiply; +} + +STBIDEF void stbi_convert_iphone_png_to_rgb(int flag_true_if_should_convert) +{ + stbi__de_iphone_flag = flag_true_if_should_convert; +} + +static void stbi__de_iphone(stbi__png *z) +{ + stbi__context *s = z->s; + stbi__uint32 i, pixel_count = s->img_x * s->img_y; + stbi_uc *p = z->out; + + if (s->img_out_n == 3) { // convert bgr to rgb + for (i=0; i < pixel_count; ++i) { + stbi_uc t = p[0]; + p[0] = p[2]; + p[2] = t; + p += 3; + } + } else { + STBI_ASSERT(s->img_out_n == 4); + if (stbi__unpremultiply_on_load) { + // convert bgr to rgb and unpremultiply + for (i=0; i < pixel_count; ++i) { + stbi_uc a = p[3]; + stbi_uc t = p[0]; + if (a) { + p[0] = p[2] * 255 / a; + p[1] = p[1] * 255 / a; + p[2] = t * 255 / a; + } else { + p[0] = p[2]; + p[2] = t; + } + p += 4; + } + } else { + // convert bgr to rgb + for (i=0; i < pixel_count; ++i) { + stbi_uc t = p[0]; + p[0] = p[2]; + p[2] = t; + p += 4; + } + } + } +} + +#define STBI__PNG_TYPE(a,b,c,d) (((a) << 24) + ((b) << 16) + ((c) << 8) + (d)) + +static int stbi__parse_png_file(stbi__png *z, int scan, int req_comp) +{ + stbi_uc palette[1024], pal_img_n=0; + stbi_uc has_trans=0, tc[3]; + stbi__uint32 ioff=0, idata_limit=0, i, pal_len=0; + int first=1,k,interlace=0, color=0, depth=0, is_iphone=0; + stbi__context *s = z->s; + + z->expanded = NULL; + z->idata = NULL; + z->out = NULL; + + if (!stbi__check_png_header(s)) return 0; + + if (scan == STBI__SCAN_type) return 1; + + for (;;) { + stbi__pngchunk c = stbi__get_chunk_header(s); + switch (c.type) { + case STBI__PNG_TYPE('C','g','B','I'): + is_iphone = 1; + stbi__skip(s, c.length); + break; + case STBI__PNG_TYPE('I','H','D','R'): { + int comp,filter; + if (!first) return stbi__err("multiple IHDR","Corrupt PNG"); + first = 0; + if (c.length != 13) return stbi__err("bad IHDR len","Corrupt PNG"); + s->img_x = stbi__get32be(s); if (s->img_x > (1 << 24)) return stbi__err("too large","Very large image (corrupt?)"); + s->img_y = stbi__get32be(s); if (s->img_y > (1 << 24)) return stbi__err("too large","Very large image (corrupt?)"); + depth = stbi__get8(s); if (depth != 1 && depth != 2 && depth != 4 && depth != 8) return stbi__err("1/2/4/8-bit only","PNG not supported: 1/2/4/8-bit only"); + color = stbi__get8(s); if (color > 6) return stbi__err("bad ctype","Corrupt PNG"); + if (color == 3) pal_img_n = 3; else if (color & 1) return stbi__err("bad ctype","Corrupt PNG"); + comp = stbi__get8(s); if (comp) return stbi__err("bad comp method","Corrupt PNG"); + filter= stbi__get8(s); if (filter) return stbi__err("bad filter method","Corrupt PNG"); + interlace = stbi__get8(s); if (interlace>1) return stbi__err("bad interlace method","Corrupt PNG"); + if (!s->img_x || !s->img_y) return stbi__err("0-pixel image","Corrupt PNG"); + if (!pal_img_n) { + s->img_n = (color & 2 ? 3 : 1) + (color & 4 ? 1 : 0); + if ((1 << 30) / s->img_x / s->img_n < s->img_y) return stbi__err("too large", "Image too large to decode"); + if (scan == STBI__SCAN_header) return 1; + } else { + // if paletted, then pal_n is our final components, and + // img_n is # components to decompress/filter. + s->img_n = 1; + if ((1 << 30) / s->img_x / 4 < s->img_y) return stbi__err("too large","Corrupt PNG"); + // if SCAN_header, have to scan to see if we have a tRNS + } + break; + } + + case STBI__PNG_TYPE('P','L','T','E'): { + if (first) return stbi__err("first not IHDR", "Corrupt PNG"); + if (c.length > 256*3) return stbi__err("invalid PLTE","Corrupt PNG"); + pal_len = c.length / 3; + if (pal_len * 3 != c.length) return stbi__err("invalid PLTE","Corrupt PNG"); + for (i=0; i < pal_len; ++i) { + palette[i*4+0] = stbi__get8(s); + palette[i*4+1] = stbi__get8(s); + palette[i*4+2] = stbi__get8(s); + palette[i*4+3] = 255; + } + break; + } + + case STBI__PNG_TYPE('t','R','N','S'): { + if (first) return stbi__err("first not IHDR", "Corrupt PNG"); + if (z->idata) return stbi__err("tRNS after IDAT","Corrupt PNG"); + if (pal_img_n) { + if (scan == STBI__SCAN_header) { s->img_n = 4; return 1; } + if (pal_len == 0) return stbi__err("tRNS before PLTE","Corrupt PNG"); + if (c.length > pal_len) return stbi__err("bad tRNS len","Corrupt PNG"); + pal_img_n = 4; + for (i=0; i < c.length; ++i) + palette[i*4+3] = stbi__get8(s); + } else { + if (!(s->img_n & 1)) return stbi__err("tRNS with alpha","Corrupt PNG"); + if (c.length != (stbi__uint32) s->img_n*2) return stbi__err("bad tRNS len","Corrupt PNG"); + has_trans = 1; + for (k=0; k < s->img_n; ++k) + tc[k] = (stbi_uc) (stbi__get16be(s) & 255) * stbi__depth_scale_table[depth]; // non 8-bit images will be larger + } + break; + } + + case STBI__PNG_TYPE('I','D','A','T'): { + if (first) return stbi__err("first not IHDR", "Corrupt PNG"); + if (pal_img_n && !pal_len) return stbi__err("no PLTE","Corrupt PNG"); + if (scan == STBI__SCAN_header) { s->img_n = pal_img_n; return 1; } + if ((int)(ioff + c.length) < (int)ioff) return 0; + if (ioff + c.length > idata_limit) { + stbi__uint32 idata_limit_old = idata_limit; + stbi_uc *p; + if (idata_limit == 0) idata_limit = c.length > 4096 ? c.length : 4096; + while (ioff + c.length > idata_limit) + idata_limit *= 2; + STBI_NOTUSED(idata_limit_old); + p = (stbi_uc *) STBI_REALLOC_SIZED(z->idata, idata_limit_old, idata_limit); if (p == NULL) return stbi__err("outofmem", "Out of memory"); + z->idata = p; + } + if (!stbi__getn(s, z->idata+ioff,c.length)) return stbi__err("outofdata","Corrupt PNG"); + ioff += c.length; + break; + } + + case STBI__PNG_TYPE('I','E','N','D'): { + stbi__uint32 raw_len, bpl; + if (first) return stbi__err("first not IHDR", "Corrupt PNG"); + if (scan != STBI__SCAN_load) return 1; + if (z->idata == NULL) return stbi__err("no IDAT","Corrupt PNG"); + // initial guess for decoded data size to avoid unnecessary reallocs + bpl = (s->img_x * depth + 7) / 8; // bytes per line, per component + raw_len = bpl * s->img_y * s->img_n /* pixels */ + s->img_y /* filter mode per row */; + z->expanded = (stbi_uc *) stbi_zlib_decode_malloc_guesssize_headerflag((char *) z->idata, ioff, raw_len, (int *) &raw_len, !is_iphone); + if (z->expanded == NULL) return 0; // zlib should set error + STBI_FREE(z->idata); z->idata = NULL; + if ((req_comp == s->img_n+1 && req_comp != 3 && !pal_img_n) || has_trans) + s->img_out_n = s->img_n+1; + else + s->img_out_n = s->img_n; + if (!stbi__create_png_image(z, z->expanded, raw_len, s->img_out_n, depth, color, interlace)) return 0; + if (has_trans) + if (!stbi__compute_transparency(z, tc, s->img_out_n)) return 0; + if (is_iphone && stbi__de_iphone_flag && s->img_out_n > 2) + stbi__de_iphone(z); + if (pal_img_n) { + // pal_img_n == 3 or 4 + s->img_n = pal_img_n; // record the actual colors we had + s->img_out_n = pal_img_n; + if (req_comp >= 3) s->img_out_n = req_comp; + if (!stbi__expand_png_palette(z, palette, pal_len, s->img_out_n)) + return 0; + } + STBI_FREE(z->expanded); z->expanded = NULL; + return 1; + } + + default: + // if critical, fail + if (first) return stbi__err("first not IHDR", "Corrupt PNG"); + if ((c.type & (1 << 29)) == 0) { + #ifndef STBI_NO_FAILURE_STRINGS + // not threadsafe + static char invalid_chunk[] = "XXXX PNG chunk not known"; + invalid_chunk[0] = STBI__BYTECAST(c.type >> 24); + invalid_chunk[1] = STBI__BYTECAST(c.type >> 16); + invalid_chunk[2] = STBI__BYTECAST(c.type >> 8); + invalid_chunk[3] = STBI__BYTECAST(c.type >> 0); + #endif + return stbi__err(invalid_chunk, "PNG not supported: unknown PNG chunk type"); + } + stbi__skip(s, c.length); + break; + } + // end of PNG chunk, read and skip CRC + stbi__get32be(s); + } +} + +static unsigned char *stbi__do_png(stbi__png *p, int *x, int *y, int *n, int req_comp) +{ + unsigned char *result=NULL; + if (req_comp < 0 || req_comp > 4) return stbi__errpuc("bad req_comp", "Internal error"); + if (stbi__parse_png_file(p, STBI__SCAN_load, req_comp)) { + result = p->out; + p->out = NULL; + if (req_comp && req_comp != p->s->img_out_n) { + result = stbi__convert_format(result, p->s->img_out_n, req_comp, p->s->img_x, p->s->img_y); + p->s->img_out_n = req_comp; + if (result == NULL) return result; + } + *x = p->s->img_x; + *y = p->s->img_y; + if (n) *n = p->s->img_out_n; + } + STBI_FREE(p->out); p->out = NULL; + STBI_FREE(p->expanded); p->expanded = NULL; + STBI_FREE(p->idata); p->idata = NULL; + + return result; +} + +static unsigned char *stbi__png_load(stbi__context *s, int *x, int *y, int *comp, int req_comp) +{ + stbi__png p; + p.s = s; + return stbi__do_png(&p, x,y,comp,req_comp); +} + +static int stbi__png_test(stbi__context *s) +{ + int r; + r = stbi__check_png_header(s); + stbi__rewind(s); + return r; +} + +static int stbi__png_info_raw(stbi__png *p, int *x, int *y, int *comp) +{ + if (!stbi__parse_png_file(p, STBI__SCAN_header, 0)) { + stbi__rewind( p->s ); + return 0; + } + if (x) *x = p->s->img_x; + if (y) *y = p->s->img_y; + if (comp) *comp = p->s->img_n; + return 1; +} + +static int stbi__png_info(stbi__context *s, int *x, int *y, int *comp) +{ + stbi__png p; + p.s = s; + return stbi__png_info_raw(&p, x, y, comp); +} +#endif + +// Microsoft/Windows BMP image + +#ifndef STBI_NO_BMP +static int stbi__bmp_test_raw(stbi__context *s) +{ + int r; + int sz; + if (stbi__get8(s) != 'B') return 0; + if (stbi__get8(s) != 'M') return 0; + stbi__get32le(s); // discard filesize + stbi__get16le(s); // discard reserved + stbi__get16le(s); // discard reserved + stbi__get32le(s); // discard data offset + sz = stbi__get32le(s); + r = (sz == 12 || sz == 40 || sz == 56 || sz == 108 || sz == 124); + return r; +} + +static int stbi__bmp_test(stbi__context *s) +{ + int r = stbi__bmp_test_raw(s); + stbi__rewind(s); + return r; +} + + +// returns 0..31 for the highest set bit +static int stbi__high_bit(unsigned int z) +{ + int n=0; + if (z == 0) return -1; + if (z >= 0x10000) n += 16, z >>= 16; + if (z >= 0x00100) n += 8, z >>= 8; + if (z >= 0x00010) n += 4, z >>= 4; + if (z >= 0x00004) n += 2, z >>= 2; + if (z >= 0x00002) n += 1, z >>= 1; + return n; +} + +static int stbi__bitcount(unsigned int a) +{ + a = (a & 0x55555555) + ((a >> 1) & 0x55555555); // max 2 + a = (a & 0x33333333) + ((a >> 2) & 0x33333333); // max 4 + a = (a + (a >> 4)) & 0x0f0f0f0f; // max 8 per 4, now 8 bits + a = (a + (a >> 8)); // max 16 per 8 bits + a = (a + (a >> 16)); // max 32 per 8 bits + return a & 0xff; +} + +static int stbi__shiftsigned(int v, int shift, int bits) +{ + int result; + int z=0; + + if (shift < 0) v <<= -shift; + else v >>= shift; + result = v; + + z = bits; + while (z < 8) { + result += v >> z; + z += bits; + } + return result; +} + +typedef struct +{ + int bpp, offset, hsz; + unsigned int mr,mg,mb,ma, all_a; +} stbi__bmp_data; + +static void *stbi__bmp_parse_header(stbi__context *s, stbi__bmp_data *info) +{ + int hsz; + if (stbi__get8(s) != 'B' || stbi__get8(s) != 'M') return stbi__errpuc("not BMP", "Corrupt BMP"); + stbi__get32le(s); // discard filesize + stbi__get16le(s); // discard reserved + stbi__get16le(s); // discard reserved + info->offset = stbi__get32le(s); + info->hsz = hsz = stbi__get32le(s); + + if (hsz != 12 && hsz != 40 && hsz != 56 && hsz != 108 && hsz != 124) return stbi__errpuc("unknown BMP", "BMP type not supported: unknown"); + if (hsz == 12) { + s->img_x = stbi__get16le(s); + s->img_y = stbi__get16le(s); + } else { + s->img_x = stbi__get32le(s); + s->img_y = stbi__get32le(s); + } + if (stbi__get16le(s) != 1) return stbi__errpuc("bad BMP", "bad BMP"); + info->bpp = stbi__get16le(s); + if (info->bpp == 1) return stbi__errpuc("monochrome", "BMP type not supported: 1-bit"); + if (hsz != 12) { + int compress = stbi__get32le(s); + if (compress == 1 || compress == 2) return stbi__errpuc("BMP RLE", "BMP type not supported: RLE"); + stbi__get32le(s); // discard sizeof + stbi__get32le(s); // discard hres + stbi__get32le(s); // discard vres + stbi__get32le(s); // discard colorsused + stbi__get32le(s); // discard max important + if (hsz == 40 || hsz == 56) { + if (hsz == 56) { + stbi__get32le(s); + stbi__get32le(s); + stbi__get32le(s); + stbi__get32le(s); + } + if (info->bpp == 16 || info->bpp == 32) { + info->mr = info->mg = info->mb = 0; + if (compress == 0) { + if (info->bpp == 32) { + info->mr = 0xffu << 16; + info->mg = 0xffu << 8; + info->mb = 0xffu << 0; + info->ma = 0xffu << 24; + info->all_a = 0; // if all_a is 0 at end, then we loaded alpha channel but it was all 0 + } else { + info->mr = 31u << 10; + info->mg = 31u << 5; + info->mb = 31u << 0; + } + } else if (compress == 3) { + info->mr = stbi__get32le(s); + info->mg = stbi__get32le(s); + info->mb = stbi__get32le(s); + // not documented, but generated by photoshop and handled by mspaint + if (info->mr == info->mg && info->mg == info->mb) { + // ?!?!? + return stbi__errpuc("bad BMP", "bad BMP"); + } + } else + return stbi__errpuc("bad BMP", "bad BMP"); + } + } else { + int i; + if (hsz != 108 && hsz != 124) + return stbi__errpuc("bad BMP", "bad BMP"); + info->mr = stbi__get32le(s); + info->mg = stbi__get32le(s); + info->mb = stbi__get32le(s); + info->ma = stbi__get32le(s); + stbi__get32le(s); // discard color space + for (i=0; i < 12; ++i) + stbi__get32le(s); // discard color space parameters + if (hsz == 124) { + stbi__get32le(s); // discard rendering intent + stbi__get32le(s); // discard offset of profile data + stbi__get32le(s); // discard size of profile data + stbi__get32le(s); // discard reserved + } + } + } + return (void *) 1; +} + + +static stbi_uc *stbi__bmp_load(stbi__context *s, int *x, int *y, int *comp, int req_comp) +{ + stbi_uc *out; + unsigned int mr=0,mg=0,mb=0,ma=0, all_a; + stbi_uc pal[256][4]; + int psize=0,i,j,width; + int flip_vertically, pad, target; + stbi__bmp_data info; + + info.all_a = 255; + if (stbi__bmp_parse_header(s, &info) == NULL) + return NULL; // error code already set + + flip_vertically = ((int) s->img_y) > 0; + s->img_y = abs((int) s->img_y); + + mr = info.mr; + mg = info.mg; + mb = info.mb; + ma = info.ma; + all_a = info.all_a; + + if (info.hsz == 12) { + if (info.bpp < 24) + psize = (info.offset - 14 - 24) / 3; + } else { + if (info.bpp < 16) + psize = (info.offset - 14 - info.hsz) >> 2; + } + + s->img_n = ma ? 4 : 3; + if (req_comp && req_comp >= 3) // we can directly decode 3 or 4 + target = req_comp; + else + target = s->img_n; // if they want monochrome, we'll post-convert + + out = (stbi_uc *) stbi__malloc(target * s->img_x * s->img_y); + if (!out) return stbi__errpuc("outofmem", "Out of memory"); + if (info.bpp < 16) { + int z=0; + if (psize == 0 || psize > 256) { STBI_FREE(out); return stbi__errpuc("invalid", "Corrupt BMP"); } + for (i=0; i < psize; ++i) { + pal[i][2] = stbi__get8(s); + pal[i][1] = stbi__get8(s); + pal[i][0] = stbi__get8(s); + if (info.hsz != 12) stbi__get8(s); + pal[i][3] = 255; + } + stbi__skip(s, info.offset - 14 - info.hsz - psize * (info.hsz == 12 ? 3 : 4)); + if (info.bpp == 4) width = (s->img_x + 1) >> 1; + else if (info.bpp == 8) width = s->img_x; + else { STBI_FREE(out); return stbi__errpuc("bad bpp", "Corrupt BMP"); } + pad = (-width)&3; + for (j=0; j < (int) s->img_y; ++j) { + for (i=0; i < (int) s->img_x; i += 2) { + int v=stbi__get8(s),v2=0; + if (info.bpp == 4) { + v2 = v & 15; + v >>= 4; + } + out[z++] = pal[v][0]; + out[z++] = pal[v][1]; + out[z++] = pal[v][2]; + if (target == 4) out[z++] = 255; + if (i+1 == (int) s->img_x) break; + v = (info.bpp == 8) ? stbi__get8(s) : v2; + out[z++] = pal[v][0]; + out[z++] = pal[v][1]; + out[z++] = pal[v][2]; + if (target == 4) out[z++] = 255; + } + stbi__skip(s, pad); + } + } else { + int rshift=0,gshift=0,bshift=0,ashift=0,rcount=0,gcount=0,bcount=0,acount=0; + int z = 0; + int easy=0; + stbi__skip(s, info.offset - 14 - info.hsz); + if (info.bpp == 24) width = 3 * s->img_x; + else if (info.bpp == 16) width = 2*s->img_x; + else /* bpp = 32 and pad = 0 */ width=0; + pad = (-width) & 3; + if (info.bpp == 24) { + easy = 1; + } else if (info.bpp == 32) { + if (mb == 0xff && mg == 0xff00 && mr == 0x00ff0000 && ma == 0xff000000) + easy = 2; + } + if (!easy) { + if (!mr || !mg || !mb) { STBI_FREE(out); return stbi__errpuc("bad masks", "Corrupt BMP"); } + // right shift amt to put high bit in position #7 + rshift = stbi__high_bit(mr)-7; rcount = stbi__bitcount(mr); + gshift = stbi__high_bit(mg)-7; gcount = stbi__bitcount(mg); + bshift = stbi__high_bit(mb)-7; bcount = stbi__bitcount(mb); + ashift = stbi__high_bit(ma)-7; acount = stbi__bitcount(ma); + } + for (j=0; j < (int) s->img_y; ++j) { + if (easy) { + for (i=0; i < (int) s->img_x; ++i) { + unsigned char a; + out[z+2] = stbi__get8(s); + out[z+1] = stbi__get8(s); + out[z+0] = stbi__get8(s); + z += 3; + a = (easy == 2 ? stbi__get8(s) : 255); + all_a |= a; + if (target == 4) out[z++] = a; + } + } else { + int bpp = info.bpp; + for (i=0; i < (int) s->img_x; ++i) { + stbi__uint32 v = (bpp == 16 ? (stbi__uint32) stbi__get16le(s) : stbi__get32le(s)); + int a; + out[z++] = STBI__BYTECAST(stbi__shiftsigned(v & mr, rshift, rcount)); + out[z++] = STBI__BYTECAST(stbi__shiftsigned(v & mg, gshift, gcount)); + out[z++] = STBI__BYTECAST(stbi__shiftsigned(v & mb, bshift, bcount)); + a = (ma ? stbi__shiftsigned(v & ma, ashift, acount) : 255); + all_a |= a; + if (target == 4) out[z++] = STBI__BYTECAST(a); + } + } + stbi__skip(s, pad); + } + } + + // if alpha channel is all 0s, replace with all 255s + if (target == 4 && all_a == 0) + for (i=4*s->img_x*s->img_y-1; i >= 0; i -= 4) + out[i] = 255; + + if (flip_vertically) { + stbi_uc t; + for (j=0; j < (int) s->img_y>>1; ++j) { + stbi_uc *p1 = out + j *s->img_x*target; + stbi_uc *p2 = out + (s->img_y-1-j)*s->img_x*target; + for (i=0; i < (int) s->img_x*target; ++i) { + t = p1[i], p1[i] = p2[i], p2[i] = t; + } + } + } + + if (req_comp && req_comp != target) { + out = stbi__convert_format(out, target, req_comp, s->img_x, s->img_y); + if (out == NULL) return out; // stbi__convert_format frees input on failure + } + + *x = s->img_x; + *y = s->img_y; + if (comp) *comp = s->img_n; + return out; +} +#endif + +// Targa Truevision - TGA +// by Jonathan Dummer +#ifndef STBI_NO_TGA +// returns STBI_rgb or whatever, 0 on error +static int stbi__tga_get_comp(int bits_per_pixel, int is_grey, int* is_rgb16) +{ + // only RGB or RGBA (incl. 16bit) or grey allowed + if(is_rgb16) *is_rgb16 = 0; + switch(bits_per_pixel) { + case 8: return STBI_grey; + case 16: if(is_grey) return STBI_grey_alpha; + // else: fall-through + case 15: if(is_rgb16) *is_rgb16 = 1; + return STBI_rgb; + case 24: // fall-through + case 32: return bits_per_pixel/8; + default: return 0; + } +} + +static int stbi__tga_info(stbi__context *s, int *x, int *y, int *comp) +{ + int tga_w, tga_h, tga_comp, tga_image_type, tga_bits_per_pixel, tga_colormap_bpp; + int sz, tga_colormap_type; + stbi__get8(s); // discard Offset + tga_colormap_type = stbi__get8(s); // colormap type + if( tga_colormap_type > 1 ) { + stbi__rewind(s); + return 0; // only RGB or indexed allowed + } + tga_image_type = stbi__get8(s); // image type + if ( tga_colormap_type == 1 ) { // colormapped (paletted) image + if (tga_image_type != 1 && tga_image_type != 9) { + stbi__rewind(s); + return 0; + } + stbi__skip(s,4); // skip index of first colormap entry and number of entries + sz = stbi__get8(s); // check bits per palette color entry + if ( (sz != 8) && (sz != 15) && (sz != 16) && (sz != 24) && (sz != 32) ) { + stbi__rewind(s); + return 0; + } + stbi__skip(s,4); // skip image x and y origin + tga_colormap_bpp = sz; + } else { // "normal" image w/o colormap - only RGB or grey allowed, +/- RLE + if ( (tga_image_type != 2) && (tga_image_type != 3) && (tga_image_type != 10) && (tga_image_type != 11) ) { + stbi__rewind(s); + return 0; // only RGB or grey allowed, +/- RLE + } + stbi__skip(s,9); // skip colormap specification and image x/y origin + tga_colormap_bpp = 0; + } + tga_w = stbi__get16le(s); + if( tga_w < 1 ) { + stbi__rewind(s); + return 0; // test width + } + tga_h = stbi__get16le(s); + if( tga_h < 1 ) { + stbi__rewind(s); + return 0; // test height + } + tga_bits_per_pixel = stbi__get8(s); // bits per pixel + stbi__get8(s); // ignore alpha bits + if (tga_colormap_bpp != 0) { + if((tga_bits_per_pixel != 8) && (tga_bits_per_pixel != 16)) { + // when using a colormap, tga_bits_per_pixel is the size of the indexes + // I don't think anything but 8 or 16bit indexes makes sense + stbi__rewind(s); + return 0; + } + tga_comp = stbi__tga_get_comp(tga_colormap_bpp, 0, NULL); + } else { + tga_comp = stbi__tga_get_comp(tga_bits_per_pixel, (tga_image_type == 3) || (tga_image_type == 11), NULL); + } + if(!tga_comp) { + stbi__rewind(s); + return 0; + } + if (x) *x = tga_w; + if (y) *y = tga_h; + if (comp) *comp = tga_comp; + return 1; // seems to have passed everything +} + +static int stbi__tga_test(stbi__context *s) +{ + int res = 0; + int sz, tga_color_type; + stbi__get8(s); // discard Offset + tga_color_type = stbi__get8(s); // color type + if ( tga_color_type > 1 ) goto errorEnd; // only RGB or indexed allowed + sz = stbi__get8(s); // image type + if ( tga_color_type == 1 ) { // colormapped (paletted) image + if (sz != 1 && sz != 9) goto errorEnd; // colortype 1 demands image type 1 or 9 + stbi__skip(s,4); // skip index of first colormap entry and number of entries + sz = stbi__get8(s); // check bits per palette color entry + if ( (sz != 8) && (sz != 15) && (sz != 16) && (sz != 24) && (sz != 32) ) goto errorEnd; + stbi__skip(s,4); // skip image x and y origin + } else { // "normal" image w/o colormap + if ( (sz != 2) && (sz != 3) && (sz != 10) && (sz != 11) ) goto errorEnd; // only RGB or grey allowed, +/- RLE + stbi__skip(s,9); // skip colormap specification and image x/y origin + } + if ( stbi__get16le(s) < 1 ) goto errorEnd; // test width + if ( stbi__get16le(s) < 1 ) goto errorEnd; // test height + sz = stbi__get8(s); // bits per pixel + if ( (tga_color_type == 1) && (sz != 8) && (sz != 16) ) goto errorEnd; // for colormapped images, bpp is size of an index + if ( (sz != 8) && (sz != 15) && (sz != 16) && (sz != 24) && (sz != 32) ) goto errorEnd; + + res = 1; // if we got this far, everything's good and we can return 1 instead of 0 + +errorEnd: + stbi__rewind(s); + return res; +} + +// read 16bit value and convert to 24bit RGB +void stbi__tga_read_rgb16(stbi__context *s, stbi_uc* out) +{ + stbi__uint16 px = stbi__get16le(s); + stbi__uint16 fiveBitMask = 31; + // we have 3 channels with 5bits each + int r = (px >> 10) & fiveBitMask; + int g = (px >> 5) & fiveBitMask; + int b = px & fiveBitMask; + // Note that this saves the data in RGB(A) order, so it doesn't need to be swapped later + out[0] = (r * 255)/31; + out[1] = (g * 255)/31; + out[2] = (b * 255)/31; + + // some people claim that the most significant bit might be used for alpha + // (possibly if an alpha-bit is set in the "image descriptor byte") + // but that only made 16bit test images completely translucent.. + // so let's treat all 15 and 16bit TGAs as RGB with no alpha. +} + +static stbi_uc *stbi__tga_load(stbi__context *s, int *x, int *y, int *comp, int req_comp) +{ + // read in the TGA header stuff + int tga_offset = stbi__get8(s); + int tga_indexed = stbi__get8(s); + int tga_image_type = stbi__get8(s); + int tga_is_RLE = 0; + int tga_palette_start = stbi__get16le(s); + int tga_palette_len = stbi__get16le(s); + int tga_palette_bits = stbi__get8(s); + int tga_x_origin = stbi__get16le(s); + int tga_y_origin = stbi__get16le(s); + int tga_width = stbi__get16le(s); + int tga_height = stbi__get16le(s); + int tga_bits_per_pixel = stbi__get8(s); + int tga_comp, tga_rgb16=0; + int tga_inverted = stbi__get8(s); + // int tga_alpha_bits = tga_inverted & 15; // the 4 lowest bits - unused (useless?) + // image data + unsigned char *tga_data; + unsigned char *tga_palette = NULL; + int i, j; + unsigned char raw_data[4]; + int RLE_count = 0; + int RLE_repeating = 0; + int read_next_pixel = 1; + + // do a tiny bit of precessing + if ( tga_image_type >= 8 ) + { + tga_image_type -= 8; + tga_is_RLE = 1; + } + tga_inverted = 1 - ((tga_inverted >> 5) & 1); + + // If I'm paletted, then I'll use the number of bits from the palette + if ( tga_indexed ) tga_comp = stbi__tga_get_comp(tga_palette_bits, 0, &tga_rgb16); + else tga_comp = stbi__tga_get_comp(tga_bits_per_pixel, (tga_image_type == 3), &tga_rgb16); + + if(!tga_comp) // shouldn't really happen, stbi__tga_test() should have ensured basic consistency + return stbi__errpuc("bad format", "Can't find out TGA pixelformat"); + + // tga info + *x = tga_width; + *y = tga_height; + if (comp) *comp = tga_comp; + + tga_data = (unsigned char*)stbi__malloc( (size_t)tga_width * tga_height * tga_comp ); + if (!tga_data) return stbi__errpuc("outofmem", "Out of memory"); + + // skip to the data's starting position (offset usually = 0) + stbi__skip(s, tga_offset ); + + if ( !tga_indexed && !tga_is_RLE && !tga_rgb16 ) { + for (i=0; i < tga_height; ++i) { + int row = tga_inverted ? tga_height -i - 1 : i; + stbi_uc *tga_row = tga_data + row*tga_width*tga_comp; + stbi__getn(s, tga_row, tga_width * tga_comp); + } + } else { + // do I need to load a palette? + if ( tga_indexed) + { + // any data to skip? (offset usually = 0) + stbi__skip(s, tga_palette_start ); + // load the palette + tga_palette = (unsigned char*)stbi__malloc( tga_palette_len * tga_comp ); + if (!tga_palette) { + STBI_FREE(tga_data); + return stbi__errpuc("outofmem", "Out of memory"); + } + if (tga_rgb16) { + stbi_uc *pal_entry = tga_palette; + STBI_ASSERT(tga_comp == STBI_rgb); + for (i=0; i < tga_palette_len; ++i) { + stbi__tga_read_rgb16(s, pal_entry); + pal_entry += tga_comp; + } + } else if (!stbi__getn(s, tga_palette, tga_palette_len * tga_comp)) { + STBI_FREE(tga_data); + STBI_FREE(tga_palette); + return stbi__errpuc("bad palette", "Corrupt TGA"); + } + } + // load the data + for (i=0; i < tga_width * tga_height; ++i) + { + // if I'm in RLE mode, do I need to get a RLE stbi__pngchunk? + if ( tga_is_RLE ) + { + if ( RLE_count == 0 ) + { + // yep, get the next byte as a RLE command + int RLE_cmd = stbi__get8(s); + RLE_count = 1 + (RLE_cmd & 127); + RLE_repeating = RLE_cmd >> 7; + read_next_pixel = 1; + } else if ( !RLE_repeating ) + { + read_next_pixel = 1; + } + } else + { + read_next_pixel = 1; + } + // OK, if I need to read a pixel, do it now + if ( read_next_pixel ) + { + // load however much data we did have + if ( tga_indexed ) + { + // read in index, then perform the lookup + int pal_idx = (tga_bits_per_pixel == 8) ? stbi__get8(s) : stbi__get16le(s); + if ( pal_idx >= tga_palette_len ) { + // invalid index + pal_idx = 0; + } + pal_idx *= tga_comp; + for (j = 0; j < tga_comp; ++j) { + raw_data[j] = tga_palette[pal_idx+j]; + } + } else if(tga_rgb16) { + STBI_ASSERT(tga_comp == STBI_rgb); + stbi__tga_read_rgb16(s, raw_data); + } else { + // read in the data raw + for (j = 0; j < tga_comp; ++j) { + raw_data[j] = stbi__get8(s); + } + } + // clear the reading flag for the next pixel + read_next_pixel = 0; + } // end of reading a pixel + + // copy data + for (j = 0; j < tga_comp; ++j) + tga_data[i*tga_comp+j] = raw_data[j]; + + // in case we're in RLE mode, keep counting down + --RLE_count; + } + // do I need to invert the image? + if ( tga_inverted ) + { + for (j = 0; j*2 < tga_height; ++j) + { + int index1 = j * tga_width * tga_comp; + int index2 = (tga_height - 1 - j) * tga_width * tga_comp; + for (i = tga_width * tga_comp; i > 0; --i) + { + unsigned char temp = tga_data[index1]; + tga_data[index1] = tga_data[index2]; + tga_data[index2] = temp; + ++index1; + ++index2; + } + } + } + // clear my palette, if I had one + if ( tga_palette != NULL ) + { + STBI_FREE( tga_palette ); + } + } + + // swap RGB - if the source data was RGB16, it already is in the right order + if (tga_comp >= 3 && !tga_rgb16) + { + unsigned char* tga_pixel = tga_data; + for (i=0; i < tga_width * tga_height; ++i) + { + unsigned char temp = tga_pixel[0]; + tga_pixel[0] = tga_pixel[2]; + tga_pixel[2] = temp; + tga_pixel += tga_comp; + } + } + + // convert to target component count + if (req_comp && req_comp != tga_comp) + tga_data = stbi__convert_format(tga_data, tga_comp, req_comp, tga_width, tga_height); + + // the things I do to get rid of an error message, and yet keep + // Microsoft's C compilers happy... [8^( + tga_palette_start = tga_palette_len = tga_palette_bits = + tga_x_origin = tga_y_origin = 0; + // OK, done + return tga_data; +} +#endif + +// ************************************************************************************************* +// Photoshop PSD loader -- PD by Thatcher Ulrich, integration by Nicolas Schulz, tweaked by STB + +#ifndef STBI_NO_PSD +static int stbi__psd_test(stbi__context *s) +{ + int r = (stbi__get32be(s) == 0x38425053); + stbi__rewind(s); + return r; +} + +static stbi_uc *stbi__psd_load(stbi__context *s, int *x, int *y, int *comp, int req_comp) +{ + int pixelCount; + int channelCount, compression; + int channel, i, count, len; + int bitdepth; + int w,h; + stbi_uc *out; + + // Check identifier + if (stbi__get32be(s) != 0x38425053) // "8BPS" + return stbi__errpuc("not PSD", "Corrupt PSD image"); + + // Check file type version. + if (stbi__get16be(s) != 1) + return stbi__errpuc("wrong version", "Unsupported version of PSD image"); + + // Skip 6 reserved bytes. + stbi__skip(s, 6 ); + + // Read the number of channels (R, G, B, A, etc). + channelCount = stbi__get16be(s); + if (channelCount < 0 || channelCount > 16) + return stbi__errpuc("wrong channel count", "Unsupported number of channels in PSD image"); + + // Read the rows and columns of the image. + h = stbi__get32be(s); + w = stbi__get32be(s); + + // Make sure the depth is 8 bits. + bitdepth = stbi__get16be(s); + if (bitdepth != 8 && bitdepth != 16) + return stbi__errpuc("unsupported bit depth", "PSD bit depth is not 8 or 16 bit"); + + // Make sure the color mode is RGB. + // Valid options are: + // 0: Bitmap + // 1: Grayscale + // 2: Indexed color + // 3: RGB color + // 4: CMYK color + // 7: Multichannel + // 8: Duotone + // 9: Lab color + if (stbi__get16be(s) != 3) + return stbi__errpuc("wrong color format", "PSD is not in RGB color format"); + + // Skip the Mode Data. (It's the palette for indexed color; other info for other modes.) + stbi__skip(s,stbi__get32be(s) ); + + // Skip the image resources. (resolution, pen tool paths, etc) + stbi__skip(s, stbi__get32be(s) ); + + // Skip the reserved data. + stbi__skip(s, stbi__get32be(s) ); + + // Find out if the data is compressed. + // Known values: + // 0: no compression + // 1: RLE compressed + compression = stbi__get16be(s); + if (compression > 1) + return stbi__errpuc("bad compression", "PSD has an unknown compression format"); + + // Create the destination image. + out = (stbi_uc *) stbi__malloc(4 * w*h); + if (!out) return stbi__errpuc("outofmem", "Out of memory"); + pixelCount = w*h; + + // Initialize the data to zero. + //memset( out, 0, pixelCount * 4 ); + + // Finally, the image data. + if (compression) { + // RLE as used by .PSD and .TIFF + // Loop until you get the number of unpacked bytes you are expecting: + // Read the next source byte into n. + // If n is between 0 and 127 inclusive, copy the next n+1 bytes literally. + // Else if n is between -127 and -1 inclusive, copy the next byte -n+1 times. + // Else if n is 128, noop. + // Endloop + + // The RLE-compressed data is preceeded by a 2-byte data count for each row in the data, + // which we're going to just skip. + stbi__skip(s, h * channelCount * 2 ); + + // Read the RLE data by channel. + for (channel = 0; channel < 4; channel++) { + stbi_uc *p; + + p = out+channel; + if (channel >= channelCount) { + // Fill this channel with default data. + for (i = 0; i < pixelCount; i++, p += 4) + *p = (channel == 3 ? 255 : 0); + } else { + // Read the RLE data. + count = 0; + while (count < pixelCount) { + len = stbi__get8(s); + if (len == 128) { + // No-op. + } else if (len < 128) { + // Copy next len+1 bytes literally. + len++; + count += len; + while (len) { + *p = stbi__get8(s); + p += 4; + len--; + } + } else if (len > 128) { + stbi_uc val; + // Next -len+1 bytes in the dest are replicated from next source byte. + // (Interpret len as a negative 8-bit int.) + len ^= 0x0FF; + len += 2; + val = stbi__get8(s); + count += len; + while (len) { + *p = val; + p += 4; + len--; + } + } + } + } + } + + } else { + // We're at the raw image data. It's each channel in order (Red, Green, Blue, Alpha, ...) + // where each channel consists of an 8-bit value for each pixel in the image. + + // Read the data by channel. + for (channel = 0; channel < 4; channel++) { + stbi_uc *p; + + p = out + channel; + if (channel >= channelCount) { + // Fill this channel with default data. + stbi_uc val = channel == 3 ? 255 : 0; + for (i = 0; i < pixelCount; i++, p += 4) + *p = val; + } else { + // Read the data. + if (bitdepth == 16) { + for (i = 0; i < pixelCount; i++, p += 4) + *p = (stbi_uc) (stbi__get16be(s) >> 8); + } else { + for (i = 0; i < pixelCount; i++, p += 4) + *p = stbi__get8(s); + } + } + } + } + + if (req_comp && req_comp != 4) { + out = stbi__convert_format(out, 4, req_comp, w, h); + if (out == NULL) return out; // stbi__convert_format frees input on failure + } + + if (comp) *comp = 4; + *y = h; + *x = w; + + return out; +} +#endif + +// ************************************************************************************************* +// Softimage PIC loader +// by Tom Seddon +// +// See http://softimage.wiki.softimage.com/index.php/INFO:_PIC_file_format +// See http://ozviz.wasp.uwa.edu.au/~pbourke/dataformats/softimagepic/ + +#ifndef STBI_NO_PIC +static int stbi__pic_is4(stbi__context *s,const char *str) +{ + int i; + for (i=0; i<4; ++i) + if (stbi__get8(s) != (stbi_uc)str[i]) + return 0; + + return 1; +} + +static int stbi__pic_test_core(stbi__context *s) +{ + int i; + + if (!stbi__pic_is4(s,"\x53\x80\xF6\x34")) + return 0; + + for(i=0;i<84;++i) + stbi__get8(s); + + if (!stbi__pic_is4(s,"PICT")) + return 0; + + return 1; +} + +typedef struct +{ + stbi_uc size,type,channel; +} stbi__pic_packet; + +static stbi_uc *stbi__readval(stbi__context *s, int channel, stbi_uc *dest) +{ + int mask=0x80, i; + + for (i=0; i<4; ++i, mask>>=1) { + if (channel & mask) { + if (stbi__at_eof(s)) return stbi__errpuc("bad file","PIC file too short"); + dest[i]=stbi__get8(s); + } + } + + return dest; +} + +static void stbi__copyval(int channel,stbi_uc *dest,const stbi_uc *src) +{ + int mask=0x80,i; + + for (i=0;i<4; ++i, mask>>=1) + if (channel&mask) + dest[i]=src[i]; +} + +static stbi_uc *stbi__pic_load_core(stbi__context *s,int width,int height,int *comp, stbi_uc *result) +{ + int act_comp=0,num_packets=0,y,chained; + stbi__pic_packet packets[10]; + + // this will (should...) cater for even some bizarre stuff like having data + // for the same channel in multiple packets. + do { + stbi__pic_packet *packet; + + if (num_packets==sizeof(packets)/sizeof(packets[0])) + return stbi__errpuc("bad format","too many packets"); + + packet = &packets[num_packets++]; + + chained = stbi__get8(s); + packet->size = stbi__get8(s); + packet->type = stbi__get8(s); + packet->channel = stbi__get8(s); + + act_comp |= packet->channel; + + if (stbi__at_eof(s)) return stbi__errpuc("bad file","file too short (reading packets)"); + if (packet->size != 8) return stbi__errpuc("bad format","packet isn't 8bpp"); + } while (chained); + + *comp = (act_comp & 0x10 ? 4 : 3); // has alpha channel? + + for(y=0; ytype) { + default: + return stbi__errpuc("bad format","packet has bad compression type"); + + case 0: {//uncompressed + int x; + + for(x=0;xchannel,dest)) + return 0; + break; + } + + case 1://Pure RLE + { + int left=width, i; + + while (left>0) { + stbi_uc count,value[4]; + + count=stbi__get8(s); + if (stbi__at_eof(s)) return stbi__errpuc("bad file","file too short (pure read count)"); + + if (count > left) + count = (stbi_uc) left; + + if (!stbi__readval(s,packet->channel,value)) return 0; + + for(i=0; ichannel,dest,value); + left -= count; + } + } + break; + + case 2: {//Mixed RLE + int left=width; + while (left>0) { + int count = stbi__get8(s), i; + if (stbi__at_eof(s)) return stbi__errpuc("bad file","file too short (mixed read count)"); + + if (count >= 128) { // Repeated + stbi_uc value[4]; + + if (count==128) + count = stbi__get16be(s); + else + count -= 127; + if (count > left) + return stbi__errpuc("bad file","scanline overrun"); + + if (!stbi__readval(s,packet->channel,value)) + return 0; + + for(i=0;ichannel,dest,value); + } else { // Raw + ++count; + if (count>left) return stbi__errpuc("bad file","scanline overrun"); + + for(i=0;ichannel,dest)) + return 0; + } + left-=count; + } + break; + } + } + } + } + + return result; +} + +static stbi_uc *stbi__pic_load(stbi__context *s,int *px,int *py,int *comp,int req_comp) +{ + stbi_uc *result; + int i, x,y; + + for (i=0; i<92; ++i) + stbi__get8(s); + + x = stbi__get16be(s); + y = stbi__get16be(s); + if (stbi__at_eof(s)) return stbi__errpuc("bad file","file too short (pic header)"); + if ((1 << 28) / x < y) return stbi__errpuc("too large", "Image too large to decode"); + + stbi__get32be(s); //skip `ratio' + stbi__get16be(s); //skip `fields' + stbi__get16be(s); //skip `pad' + + // intermediate buffer is RGBA + result = (stbi_uc *) stbi__malloc(x*y*4); + memset(result, 0xff, x*y*4); + + if (!stbi__pic_load_core(s,x,y,comp, result)) { + STBI_FREE(result); + result=0; + } + *px = x; + *py = y; + if (req_comp == 0) req_comp = *comp; + result=stbi__convert_format(result,4,req_comp,x,y); + + return result; +} + +static int stbi__pic_test(stbi__context *s) +{ + int r = stbi__pic_test_core(s); + stbi__rewind(s); + return r; +} +#endif + +// ************************************************************************************************* +// GIF loader -- public domain by Jean-Marc Lienher -- simplified/shrunk by stb + +#ifndef STBI_NO_GIF +typedef struct +{ + stbi__int16 prefix; + stbi_uc first; + stbi_uc suffix; +} stbi__gif_lzw; + +typedef struct +{ + int w,h; + stbi_uc *out, *old_out; // output buffer (always 4 components) + int flags, bgindex, ratio, transparent, eflags, delay; + stbi_uc pal[256][4]; + stbi_uc lpal[256][4]; + stbi__gif_lzw codes[4096]; + stbi_uc *color_table; + int parse, step; + int lflags; + int start_x, start_y; + int max_x, max_y; + int cur_x, cur_y; + int line_size; +} stbi__gif; + +static int stbi__gif_test_raw(stbi__context *s) +{ + int sz; + if (stbi__get8(s) != 'G' || stbi__get8(s) != 'I' || stbi__get8(s) != 'F' || stbi__get8(s) != '8') return 0; + sz = stbi__get8(s); + if (sz != '9' && sz != '7') return 0; + if (stbi__get8(s) != 'a') return 0; + return 1; +} + +static int stbi__gif_test(stbi__context *s) +{ + int r = stbi__gif_test_raw(s); + stbi__rewind(s); + return r; +} + +static void stbi__gif_parse_colortable(stbi__context *s, stbi_uc pal[256][4], int num_entries, int transp) +{ + int i; + for (i=0; i < num_entries; ++i) { + pal[i][2] = stbi__get8(s); + pal[i][1] = stbi__get8(s); + pal[i][0] = stbi__get8(s); + pal[i][3] = transp == i ? 0 : 255; + } +} + +static int stbi__gif_header(stbi__context *s, stbi__gif *g, int *comp, int is_info) +{ + stbi_uc version; + if (stbi__get8(s) != 'G' || stbi__get8(s) != 'I' || stbi__get8(s) != 'F' || stbi__get8(s) != '8') + return stbi__err("not GIF", "Corrupt GIF"); + + version = stbi__get8(s); + if (version != '7' && version != '9') return stbi__err("not GIF", "Corrupt GIF"); + if (stbi__get8(s) != 'a') return stbi__err("not GIF", "Corrupt GIF"); + + stbi__g_failure_reason = ""; + g->w = stbi__get16le(s); + g->h = stbi__get16le(s); + g->flags = stbi__get8(s); + g->bgindex = stbi__get8(s); + g->ratio = stbi__get8(s); + g->transparent = -1; + + if (comp != 0) *comp = 4; // can't actually tell whether it's 3 or 4 until we parse the comments + + if (is_info) return 1; + + if (g->flags & 0x80) + stbi__gif_parse_colortable(s,g->pal, 2 << (g->flags & 7), -1); + + return 1; +} + +static int stbi__gif_info_raw(stbi__context *s, int *x, int *y, int *comp) +{ + stbi__gif g; + if (!stbi__gif_header(s, &g, comp, 1)) { + stbi__rewind( s ); + return 0; + } + if (x) *x = g.w; + if (y) *y = g.h; + return 1; +} + +static void stbi__out_gif_code(stbi__gif *g, stbi__uint16 code) +{ + stbi_uc *p, *c; + + // recurse to decode the prefixes, since the linked-list is backwards, + // and working backwards through an interleaved image would be nasty + if (g->codes[code].prefix >= 0) + stbi__out_gif_code(g, g->codes[code].prefix); + + if (g->cur_y >= g->max_y) return; + + p = &g->out[g->cur_x + g->cur_y]; + c = &g->color_table[g->codes[code].suffix * 4]; + + if (c[3] >= 128) { + p[0] = c[2]; + p[1] = c[1]; + p[2] = c[0]; + p[3] = c[3]; + } + g->cur_x += 4; + + if (g->cur_x >= g->max_x) { + g->cur_x = g->start_x; + g->cur_y += g->step; + + while (g->cur_y >= g->max_y && g->parse > 0) { + g->step = (1 << g->parse) * g->line_size; + g->cur_y = g->start_y + (g->step >> 1); + --g->parse; + } + } +} + +static stbi_uc *stbi__process_gif_raster(stbi__context *s, stbi__gif *g) +{ + stbi_uc lzw_cs; + stbi__int32 len, init_code; + stbi__uint32 first; + stbi__int32 codesize, codemask, avail, oldcode, bits, valid_bits, clear; + stbi__gif_lzw *p; + + lzw_cs = stbi__get8(s); + if (lzw_cs > 12) return NULL; + clear = 1 << lzw_cs; + first = 1; + codesize = lzw_cs + 1; + codemask = (1 << codesize) - 1; + bits = 0; + valid_bits = 0; + for (init_code = 0; init_code < clear; init_code++) { + g->codes[init_code].prefix = -1; + g->codes[init_code].first = (stbi_uc) init_code; + g->codes[init_code].suffix = (stbi_uc) init_code; + } + + // support no starting clear code + avail = clear+2; + oldcode = -1; + + len = 0; + for(;;) { + if (valid_bits < codesize) { + if (len == 0) { + len = stbi__get8(s); // start new block + if (len == 0) + return g->out; + } + --len; + bits |= (stbi__int32) stbi__get8(s) << valid_bits; + valid_bits += 8; + } else { + stbi__int32 code = bits & codemask; + bits >>= codesize; + valid_bits -= codesize; + // @OPTIMIZE: is there some way we can accelerate the non-clear path? + if (code == clear) { // clear code + codesize = lzw_cs + 1; + codemask = (1 << codesize) - 1; + avail = clear + 2; + oldcode = -1; + first = 0; + } else if (code == clear + 1) { // end of stream code + stbi__skip(s, len); + while ((len = stbi__get8(s)) > 0) + stbi__skip(s,len); + return g->out; + } else if (code <= avail) { + if (first) return stbi__errpuc("no clear code", "Corrupt GIF"); + + if (oldcode >= 0) { + p = &g->codes[avail++]; + if (avail > 4096) return stbi__errpuc("too many codes", "Corrupt GIF"); + p->prefix = (stbi__int16) oldcode; + p->first = g->codes[oldcode].first; + p->suffix = (code == avail) ? p->first : g->codes[code].first; + } else if (code == avail) + return stbi__errpuc("illegal code in raster", "Corrupt GIF"); + + stbi__out_gif_code(g, (stbi__uint16) code); + + if ((avail & codemask) == 0 && avail <= 0x0FFF) { + codesize++; + codemask = (1 << codesize) - 1; + } + + oldcode = code; + } else { + return stbi__errpuc("illegal code in raster", "Corrupt GIF"); + } + } + } +} + +static void stbi__fill_gif_background(stbi__gif *g, int x0, int y0, int x1, int y1) +{ + int x, y; + stbi_uc *c = g->pal[g->bgindex]; + for (y = y0; y < y1; y += 4 * g->w) { + for (x = x0; x < x1; x += 4) { + stbi_uc *p = &g->out[y + x]; + p[0] = c[2]; + p[1] = c[1]; + p[2] = c[0]; + p[3] = 0; + } + } +} + +// this function is designed to support animated gifs, although stb_image doesn't support it +static stbi_uc *stbi__gif_load_next(stbi__context *s, stbi__gif *g, int *comp, int req_comp) +{ + int i; + stbi_uc *prev_out = 0; + + if (g->out == 0 && !stbi__gif_header(s, g, comp,0)) + return 0; // stbi__g_failure_reason set by stbi__gif_header + + prev_out = g->out; + g->out = (stbi_uc *) stbi__malloc(4 * g->w * g->h); + if (g->out == 0) return stbi__errpuc("outofmem", "Out of memory"); + + switch ((g->eflags & 0x1C) >> 2) { + case 0: // unspecified (also always used on 1st frame) + stbi__fill_gif_background(g, 0, 0, 4 * g->w, 4 * g->w * g->h); + break; + case 1: // do not dispose + if (prev_out) memcpy(g->out, prev_out, 4 * g->w * g->h); + g->old_out = prev_out; + break; + case 2: // dispose to background + if (prev_out) memcpy(g->out, prev_out, 4 * g->w * g->h); + stbi__fill_gif_background(g, g->start_x, g->start_y, g->max_x, g->max_y); + break; + case 3: // dispose to previous + if (g->old_out) { + for (i = g->start_y; i < g->max_y; i += 4 * g->w) + memcpy(&g->out[i + g->start_x], &g->old_out[i + g->start_x], g->max_x - g->start_x); + } + break; + } + + for (;;) { + switch (stbi__get8(s)) { + case 0x2C: /* Image Descriptor */ + { + int prev_trans = -1; + stbi__int32 x, y, w, h; + stbi_uc *o; + + x = stbi__get16le(s); + y = stbi__get16le(s); + w = stbi__get16le(s); + h = stbi__get16le(s); + if (((x + w) > (g->w)) || ((y + h) > (g->h))) + return stbi__errpuc("bad Image Descriptor", "Corrupt GIF"); + + g->line_size = g->w * 4; + g->start_x = x * 4; + g->start_y = y * g->line_size; + g->max_x = g->start_x + w * 4; + g->max_y = g->start_y + h * g->line_size; + g->cur_x = g->start_x; + g->cur_y = g->start_y; + + g->lflags = stbi__get8(s); + + if (g->lflags & 0x40) { + g->step = 8 * g->line_size; // first interlaced spacing + g->parse = 3; + } else { + g->step = g->line_size; + g->parse = 0; + } + + if (g->lflags & 0x80) { + stbi__gif_parse_colortable(s,g->lpal, 2 << (g->lflags & 7), g->eflags & 0x01 ? g->transparent : -1); + g->color_table = (stbi_uc *) g->lpal; + } else if (g->flags & 0x80) { + if (g->transparent >= 0 && (g->eflags & 0x01)) { + prev_trans = g->pal[g->transparent][3]; + g->pal[g->transparent][3] = 0; + } + g->color_table = (stbi_uc *) g->pal; + } else + return stbi__errpuc("missing color table", "Corrupt GIF"); + + o = stbi__process_gif_raster(s, g); + if (o == NULL) return NULL; + + if (prev_trans != -1) + g->pal[g->transparent][3] = (stbi_uc) prev_trans; + + return o; + } + + case 0x21: // Comment Extension. + { + int len; + if (stbi__get8(s) == 0xF9) { // Graphic Control Extension. + len = stbi__get8(s); + if (len == 4) { + g->eflags = stbi__get8(s); + g->delay = stbi__get16le(s); + g->transparent = stbi__get8(s); + } else { + stbi__skip(s, len); + break; + } + } + while ((len = stbi__get8(s)) != 0) + stbi__skip(s, len); + break; + } + + case 0x3B: // gif stream termination code + return (stbi_uc *) s; // using '1' causes warning on some compilers + + default: + return stbi__errpuc("unknown code", "Corrupt GIF"); + } + } + + STBI_NOTUSED(req_comp); +} + +static stbi_uc *stbi__gif_load(stbi__context *s, int *x, int *y, int *comp, int req_comp) +{ + stbi_uc *u = 0; + stbi__gif g; + memset(&g, 0, sizeof(g)); + + u = stbi__gif_load_next(s, &g, comp, req_comp); + if (u == (stbi_uc *) s) u = 0; // end of animated gif marker + if (u) { + *x = g.w; + *y = g.h; + if (req_comp && req_comp != 4) + u = stbi__convert_format(u, 4, req_comp, g.w, g.h); + } + else if (g.out) + STBI_FREE(g.out); + + return u; +} + +static int stbi__gif_info(stbi__context *s, int *x, int *y, int *comp) +{ + return stbi__gif_info_raw(s,x,y,comp); +} +#endif + +// ************************************************************************************************* +// Radiance RGBE HDR loader +// originally by Nicolas Schulz +#ifndef STBI_NO_HDR +static int stbi__hdr_test_core(stbi__context *s) +{ + const char *signature = "#?RADIANCE\n"; + int i; + for (i=0; signature[i]; ++i) + if (stbi__get8(s) != signature[i]) + return 0; + return 1; +} + +static int stbi__hdr_test(stbi__context* s) +{ + int r = stbi__hdr_test_core(s); + stbi__rewind(s); + return r; +} + +#define STBI__HDR_BUFLEN 1024 +static char *stbi__hdr_gettoken(stbi__context *z, char *buffer) +{ + int len=0; + char c = '\0'; + + c = (char) stbi__get8(z); + + while (!stbi__at_eof(z) && c != '\n') { + buffer[len++] = c; + if (len == STBI__HDR_BUFLEN-1) { + // flush to end of line + while (!stbi__at_eof(z) && stbi__get8(z) != '\n') + ; + break; + } + c = (char) stbi__get8(z); + } + + buffer[len] = 0; + return buffer; +} + +static void stbi__hdr_convert(float *output, stbi_uc *input, int req_comp) +{ + if ( input[3] != 0 ) { + float f1; + // Exponent + f1 = (float) ldexp(1.0f, input[3] - (int)(128 + 8)); + if (req_comp <= 2) + output[0] = (input[0] + input[1] + input[2]) * f1 / 3; + else { + output[0] = input[0] * f1; + output[1] = input[1] * f1; + output[2] = input[2] * f1; + } + if (req_comp == 2) output[1] = 1; + if (req_comp == 4) output[3] = 1; + } else { + switch (req_comp) { + case 4: output[3] = 1; /* fallthrough */ + case 3: output[0] = output[1] = output[2] = 0; + break; + case 2: output[1] = 1; /* fallthrough */ + case 1: output[0] = 0; + break; + } + } +} + +static float *stbi__hdr_load(stbi__context *s, int *x, int *y, int *comp, int req_comp) +{ + char buffer[STBI__HDR_BUFLEN]; + char *token; + int valid = 0; + int width, height; + stbi_uc *scanline; + float *hdr_data; + int len; + unsigned char count, value; + int i, j, k, c1,c2, z; + + + // Check identifier + if (strcmp(stbi__hdr_gettoken(s,buffer), "#?RADIANCE") != 0) + return stbi__errpf("not HDR", "Corrupt HDR image"); + + // Parse header + for(;;) { + token = stbi__hdr_gettoken(s,buffer); + if (token[0] == 0) break; + if (strcmp(token, "FORMAT=32-bit_rle_rgbe") == 0) valid = 1; + } + + if (!valid) return stbi__errpf("unsupported format", "Unsupported HDR format"); + + // Parse width and height + // can't use sscanf() if we're not using stdio! + token = stbi__hdr_gettoken(s,buffer); + if (strncmp(token, "-Y ", 3)) return stbi__errpf("unsupported data layout", "Unsupported HDR format"); + token += 3; + height = (int) strtol(token, &token, 10); + while (*token == ' ') ++token; + if (strncmp(token, "+X ", 3)) return stbi__errpf("unsupported data layout", "Unsupported HDR format"); + token += 3; + width = (int) strtol(token, NULL, 10); + + *x = width; + *y = height; + + if (comp) *comp = 3; + if (req_comp == 0) req_comp = 3; + + // Read data + hdr_data = (float *) stbi__malloc(height * width * req_comp * sizeof(float)); + + // Load image data + // image data is stored as some number of sca + if ( width < 8 || width >= 32768) { + // Read flat data + for (j=0; j < height; ++j) { + for (i=0; i < width; ++i) { + stbi_uc rgbe[4]; + main_decode_loop: + stbi__getn(s, rgbe, 4); + stbi__hdr_convert(hdr_data + j * width * req_comp + i * req_comp, rgbe, req_comp); + } + } + } else { + // Read RLE-encoded data + scanline = NULL; + + for (j = 0; j < height; ++j) { + c1 = stbi__get8(s); + c2 = stbi__get8(s); + len = stbi__get8(s); + if (c1 != 2 || c2 != 2 || (len & 0x80)) { + // not run-length encoded, so we have to actually use THIS data as a decoded + // pixel (note this can't be a valid pixel--one of RGB must be >= 128) + stbi_uc rgbe[4]; + rgbe[0] = (stbi_uc) c1; + rgbe[1] = (stbi_uc) c2; + rgbe[2] = (stbi_uc) len; + rgbe[3] = (stbi_uc) stbi__get8(s); + stbi__hdr_convert(hdr_data, rgbe, req_comp); + i = 1; + j = 0; + STBI_FREE(scanline); + goto main_decode_loop; // yes, this makes no sense + } + len <<= 8; + len |= stbi__get8(s); + if (len != width) { STBI_FREE(hdr_data); STBI_FREE(scanline); return stbi__errpf("invalid decoded scanline length", "corrupt HDR"); } + if (scanline == NULL) scanline = (stbi_uc *) stbi__malloc(width * 4); + + for (k = 0; k < 4; ++k) { + i = 0; + while (i < width) { + count = stbi__get8(s); + if (count > 128) { + // Run + value = stbi__get8(s); + count -= 128; + for (z = 0; z < count; ++z) + scanline[i++ * 4 + k] = value; + } else { + // Dump + for (z = 0; z < count; ++z) + scanline[i++ * 4 + k] = stbi__get8(s); + } + } + } + for (i=0; i < width; ++i) + stbi__hdr_convert(hdr_data+(j*width + i)*req_comp, scanline + i*4, req_comp); + } + STBI_FREE(scanline); + } + + return hdr_data; +} + +static int stbi__hdr_info(stbi__context *s, int *x, int *y, int *comp) +{ + char buffer[STBI__HDR_BUFLEN]; + char *token; + int valid = 0; + + if (stbi__hdr_test(s) == 0) { + stbi__rewind( s ); + return 0; + } + + for(;;) { + token = stbi__hdr_gettoken(s,buffer); + if (token[0] == 0) break; + if (strcmp(token, "FORMAT=32-bit_rle_rgbe") == 0) valid = 1; + } + + if (!valid) { + stbi__rewind( s ); + return 0; + } + token = stbi__hdr_gettoken(s,buffer); + if (strncmp(token, "-Y ", 3)) { + stbi__rewind( s ); + return 0; + } + token += 3; + *y = (int) strtol(token, &token, 10); + while (*token == ' ') ++token; + if (strncmp(token, "+X ", 3)) { + stbi__rewind( s ); + return 0; + } + token += 3; + *x = (int) strtol(token, NULL, 10); + *comp = 3; + return 1; +} +#endif // STBI_NO_HDR + +#ifndef STBI_NO_BMP +static int stbi__bmp_info(stbi__context *s, int *x, int *y, int *comp) +{ + void *p; + stbi__bmp_data info; + + info.all_a = 255; + p = stbi__bmp_parse_header(s, &info); + stbi__rewind( s ); + if (p == NULL) + return 0; + *x = s->img_x; + *y = s->img_y; + *comp = info.ma ? 4 : 3; + return 1; +} +#endif + +#ifndef STBI_NO_PSD +static int stbi__psd_info(stbi__context *s, int *x, int *y, int *comp) +{ + int channelCount; + if (stbi__get32be(s) != 0x38425053) { + stbi__rewind( s ); + return 0; + } + if (stbi__get16be(s) != 1) { + stbi__rewind( s ); + return 0; + } + stbi__skip(s, 6); + channelCount = stbi__get16be(s); + if (channelCount < 0 || channelCount > 16) { + stbi__rewind( s ); + return 0; + } + *y = stbi__get32be(s); + *x = stbi__get32be(s); + if (stbi__get16be(s) != 8) { + stbi__rewind( s ); + return 0; + } + if (stbi__get16be(s) != 3) { + stbi__rewind( s ); + return 0; + } + *comp = 4; + return 1; +} +#endif + +#ifndef STBI_NO_PIC +static int stbi__pic_info(stbi__context *s, int *x, int *y, int *comp) +{ + int act_comp=0,num_packets=0,chained; + stbi__pic_packet packets[10]; + + if (!stbi__pic_is4(s,"\x53\x80\xF6\x34")) { + stbi__rewind(s); + return 0; + } + + stbi__skip(s, 88); + + *x = stbi__get16be(s); + *y = stbi__get16be(s); + if (stbi__at_eof(s)) { + stbi__rewind( s); + return 0; + } + if ( (*x) != 0 && (1 << 28) / (*x) < (*y)) { + stbi__rewind( s ); + return 0; + } + + stbi__skip(s, 8); + + do { + stbi__pic_packet *packet; + + if (num_packets==sizeof(packets)/sizeof(packets[0])) + return 0; + + packet = &packets[num_packets++]; + chained = stbi__get8(s); + packet->size = stbi__get8(s); + packet->type = stbi__get8(s); + packet->channel = stbi__get8(s); + act_comp |= packet->channel; + + if (stbi__at_eof(s)) { + stbi__rewind( s ); + return 0; + } + if (packet->size != 8) { + stbi__rewind( s ); + return 0; + } + } while (chained); + + *comp = (act_comp & 0x10 ? 4 : 3); + + return 1; +} +#endif + +// ************************************************************************************************* +// Portable Gray Map and Portable Pixel Map loader +// by Ken Miller +// +// PGM: http://netpbm.sourceforge.net/doc/pgm.html +// PPM: http://netpbm.sourceforge.net/doc/ppm.html +// +// Known limitations: +// Does not support comments in the header section +// Does not support ASCII image data (formats P2 and P3) +// Does not support 16-bit-per-channel + +#ifndef STBI_NO_PNM + +static int stbi__pnm_test(stbi__context *s) +{ + char p, t; + p = (char) stbi__get8(s); + t = (char) stbi__get8(s); + if (p != 'P' || (t != '5' && t != '6')) { + stbi__rewind( s ); + return 0; + } + return 1; +} + +static stbi_uc *stbi__pnm_load(stbi__context *s, int *x, int *y, int *comp, int req_comp) +{ + stbi_uc *out; + if (!stbi__pnm_info(s, (int *)&s->img_x, (int *)&s->img_y, (int *)&s->img_n)) + return 0; + *x = s->img_x; + *y = s->img_y; + *comp = s->img_n; + + out = (stbi_uc *) stbi__malloc(s->img_n * s->img_x * s->img_y); + if (!out) return stbi__errpuc("outofmem", "Out of memory"); + stbi__getn(s, out, s->img_n * s->img_x * s->img_y); + + if (req_comp && req_comp != s->img_n) { + out = stbi__convert_format(out, s->img_n, req_comp, s->img_x, s->img_y); + if (out == NULL) return out; // stbi__convert_format frees input on failure + } + return out; +} + +static int stbi__pnm_isspace(char c) +{ + return c == ' ' || c == '\t' || c == '\n' || c == '\v' || c == '\f' || c == '\r'; +} + +static void stbi__pnm_skip_whitespace(stbi__context *s, char *c) +{ + for (;;) { + while (!stbi__at_eof(s) && stbi__pnm_isspace(*c)) + *c = (char) stbi__get8(s); + + if (stbi__at_eof(s) || *c != '#') + break; + + while (!stbi__at_eof(s) && *c != '\n' && *c != '\r' ) + *c = (char) stbi__get8(s); + } +} + +static int stbi__pnm_isdigit(char c) +{ + return c >= '0' && c <= '9'; +} + +static int stbi__pnm_getinteger(stbi__context *s, char *c) +{ + int value = 0; + + while (!stbi__at_eof(s) && stbi__pnm_isdigit(*c)) { + value = value*10 + (*c - '0'); + *c = (char) stbi__get8(s); + } + + return value; +} + +static int stbi__pnm_info(stbi__context *s, int *x, int *y, int *comp) +{ + int maxv; + char c, p, t; + + stbi__rewind( s ); + + // Get identifier + p = (char) stbi__get8(s); + t = (char) stbi__get8(s); + if (p != 'P' || (t != '5' && t != '6')) { + stbi__rewind( s ); + return 0; + } + + *comp = (t == '6') ? 3 : 1; // '5' is 1-component .pgm; '6' is 3-component .ppm + + c = (char) stbi__get8(s); + stbi__pnm_skip_whitespace(s, &c); + + *x = stbi__pnm_getinteger(s, &c); // read width + stbi__pnm_skip_whitespace(s, &c); + + *y = stbi__pnm_getinteger(s, &c); // read height + stbi__pnm_skip_whitespace(s, &c); + + maxv = stbi__pnm_getinteger(s, &c); // read max value + + if (maxv > 255) + return stbi__err("max value > 255", "PPM image not 8-bit"); + else + return 1; +} +#endif + +static int stbi__info_main(stbi__context *s, int *x, int *y, int *comp) +{ + #ifndef STBI_NO_JPEG + if (stbi__jpeg_info(s, x, y, comp)) return 1; + #endif + + #ifndef STBI_NO_PNG + if (stbi__png_info(s, x, y, comp)) return 1; + #endif + + #ifndef STBI_NO_GIF + if (stbi__gif_info(s, x, y, comp)) return 1; + #endif + + #ifndef STBI_NO_BMP + if (stbi__bmp_info(s, x, y, comp)) return 1; + #endif + + #ifndef STBI_NO_PSD + if (stbi__psd_info(s, x, y, comp)) return 1; + #endif + + #ifndef STBI_NO_PIC + if (stbi__pic_info(s, x, y, comp)) return 1; + #endif + + #ifndef STBI_NO_PNM + if (stbi__pnm_info(s, x, y, comp)) return 1; + #endif + + #ifndef STBI_NO_HDR + if (stbi__hdr_info(s, x, y, comp)) return 1; + #endif + + // test tga last because it's a crappy test! + #ifndef STBI_NO_TGA + if (stbi__tga_info(s, x, y, comp)) + return 1; + #endif + return stbi__err("unknown image type", "Image not of any known type, or corrupt"); +} + +#ifndef STBI_NO_STDIO +STBIDEF int stbi_info(char const *filename, int *x, int *y, int *comp) +{ + FILE *f = stbi__fopen(filename, "rb"); + int result; + if (!f) return stbi__err("can't fopen", "Unable to open file"); + result = stbi_info_from_file(f, x, y, comp); + fclose(f); + return result; +} + +STBIDEF int stbi_info_from_file(FILE *f, int *x, int *y, int *comp) +{ + int r; + stbi__context s; + long pos = ftell(f); + stbi__start_file(&s, f); + r = stbi__info_main(&s,x,y,comp); + fseek(f,pos,SEEK_SET); + return r; +} +#endif // !STBI_NO_STDIO + +STBIDEF int stbi_info_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp) +{ + stbi__context s; + stbi__start_mem(&s,buffer,len); + return stbi__info_main(&s,x,y,comp); +} + +STBIDEF int stbi_info_from_callbacks(stbi_io_callbacks const *c, void *user, int *x, int *y, int *comp) +{ + stbi__context s; + stbi__start_callbacks(&s, (stbi_io_callbacks *) c, user); + return stbi__info_main(&s,x,y,comp); +} + +#endif // STB_IMAGE_IMPLEMENTATION + +/* + revision history: + 2.10 (2016-01-22) avoid warning introduced in 2.09 by STBI_REALLOC_SIZED + 2.09 (2016-01-16) allow comments in PNM files + 16-bit-per-pixel TGA (not bit-per-component) + info() for TGA could break due to .hdr handling + info() for BMP to shares code instead of sloppy parse + can use STBI_REALLOC_SIZED if allocator doesn't support realloc + code cleanup + 2.08 (2015-09-13) fix to 2.07 cleanup, reading RGB PSD as RGBA + 2.07 (2015-09-13) fix compiler warnings + partial animated GIF support + limited 16-bpc PSD support + #ifdef unused functions + bug with < 92 byte PIC,PNM,HDR,TGA + 2.06 (2015-04-19) fix bug where PSD returns wrong '*comp' value + 2.05 (2015-04-19) fix bug in progressive JPEG handling, fix warning + 2.04 (2015-04-15) try to re-enable SIMD on MinGW 64-bit + 2.03 (2015-04-12) extra corruption checking (mmozeiko) + stbi_set_flip_vertically_on_load (nguillemot) + fix NEON support; fix mingw support + 2.02 (2015-01-19) fix incorrect assert, fix warning + 2.01 (2015-01-17) fix various warnings; suppress SIMD on gcc 32-bit without -msse2 + 2.00b (2014-12-25) fix STBI_MALLOC in progressive JPEG + 2.00 (2014-12-25) optimize JPG, including x86 SSE2 & NEON SIMD (ryg) + progressive JPEG (stb) + PGM/PPM support (Ken Miller) + STBI_MALLOC,STBI_REALLOC,STBI_FREE + GIF bugfix -- seemingly never worked + STBI_NO_*, STBI_ONLY_* + 1.48 (2014-12-14) fix incorrectly-named assert() + 1.47 (2014-12-14) 1/2/4-bit PNG support, both direct and paletted (Omar Cornut & stb) + optimize PNG (ryg) + fix bug in interlaced PNG with user-specified channel count (stb) + 1.46 (2014-08-26) + fix broken tRNS chunk (colorkey-style transparency) in non-paletted PNG + 1.45 (2014-08-16) + fix MSVC-ARM internal compiler error by wrapping malloc + 1.44 (2014-08-07) + various warning fixes from Ronny Chevalier + 1.43 (2014-07-15) + fix MSVC-only compiler problem in code changed in 1.42 + 1.42 (2014-07-09) + don't define _CRT_SECURE_NO_WARNINGS (affects user code) + fixes to stbi__cleanup_jpeg path + added STBI_ASSERT to avoid requiring assert.h + 1.41 (2014-06-25) + fix search&replace from 1.36 that messed up comments/error messages + 1.40 (2014-06-22) + fix gcc struct-initialization warning + 1.39 (2014-06-15) + fix to TGA optimization when req_comp != number of components in TGA; + fix to GIF loading because BMP wasn't rewinding (whoops, no GIFs in my test suite) + add support for BMP version 5 (more ignored fields) + 1.38 (2014-06-06) + suppress MSVC warnings on integer casts truncating values + fix accidental rename of 'skip' field of I/O + 1.37 (2014-06-04) + remove duplicate typedef + 1.36 (2014-06-03) + convert to header file single-file library + if de-iphone isn't set, load iphone images color-swapped instead of returning NULL + 1.35 (2014-05-27) + various warnings + fix broken STBI_SIMD path + fix bug where stbi_load_from_file no longer left file pointer in correct place + fix broken non-easy path for 32-bit BMP (possibly never used) + TGA optimization by Arseny Kapoulkine + 1.34 (unknown) + use STBI_NOTUSED in stbi__resample_row_generic(), fix one more leak in tga failure case + 1.33 (2011-07-14) + make stbi_is_hdr work in STBI_NO_HDR (as specified), minor compiler-friendly improvements + 1.32 (2011-07-13) + support for "info" function for all supported filetypes (SpartanJ) + 1.31 (2011-06-20) + a few more leak fixes, bug in PNG handling (SpartanJ) + 1.30 (2011-06-11) + added ability to load files via callbacks to accomidate custom input streams (Ben Wenger) + removed deprecated format-specific test/load functions + removed support for installable file formats (stbi_loader) -- would have been broken for IO callbacks anyway + error cases in bmp and tga give messages and don't leak (Raymond Barbiero, grisha) + fix inefficiency in decoding 32-bit BMP (David Woo) + 1.29 (2010-08-16) + various warning fixes from Aurelien Pocheville + 1.28 (2010-08-01) + fix bug in GIF palette transparency (SpartanJ) + 1.27 (2010-08-01) + cast-to-stbi_uc to fix warnings + 1.26 (2010-07-24) + fix bug in file buffering for PNG reported by SpartanJ + 1.25 (2010-07-17) + refix trans_data warning (Won Chun) + 1.24 (2010-07-12) + perf improvements reading from files on platforms with lock-heavy fgetc() + minor perf improvements for jpeg + deprecated type-specific functions so we'll get feedback if they're needed + attempt to fix trans_data warning (Won Chun) + 1.23 fixed bug in iPhone support + 1.22 (2010-07-10) + removed image *writing* support + stbi_info support from Jetro Lauha + GIF support from Jean-Marc Lienher + iPhone PNG-extensions from James Brown + warning-fixes from Nicolas Schulz and Janez Zemva (i.stbi__err. Janez (U+017D)emva) + 1.21 fix use of 'stbi_uc' in header (reported by jon blow) + 1.20 added support for Softimage PIC, by Tom Seddon + 1.19 bug in interlaced PNG corruption check (found by ryg) + 1.18 (2008-08-02) + fix a threading bug (local mutable static) + 1.17 support interlaced PNG + 1.16 major bugfix - stbi__convert_format converted one too many pixels + 1.15 initialize some fields for thread safety + 1.14 fix threadsafe conversion bug + header-file-only version (#define STBI_HEADER_FILE_ONLY before including) + 1.13 threadsafe + 1.12 const qualifiers in the API + 1.11 Support installable IDCT, colorspace conversion routines + 1.10 Fixes for 64-bit (don't use "unsigned long") + optimized upsampling by Fabian "ryg" Giesen + 1.09 Fix format-conversion for PSD code (bad global variables!) + 1.08 Thatcher Ulrich's PSD code integrated by Nicolas Schulz + 1.07 attempt to fix C++ warning/errors again + 1.06 attempt to fix C++ warning/errors again + 1.05 fix TGA loading to return correct *comp and use good luminance calc + 1.04 default float alpha is 1, not 255; use 'void *' for stbi_image_free + 1.03 bugfixes to STBI_NO_STDIO, STBI_NO_HDR + 1.02 support for (subset of) HDR files, float interface for preferred access to them + 1.01 fix bug: possible bug in handling right-side up bmps... not sure + fix bug: the stbi__bmp_load() and stbi__tga_load() functions didn't work at all + 1.00 interface to zlib that skips zlib header + 0.99 correct handling of alpha in palette + 0.98 TGA loader by lonesock; dynamically add loaders (untested) + 0.97 jpeg errors on too large a file; also catch another malloc failure + 0.96 fix detection of invalid v value - particleman@mollyrocket forum + 0.95 during header scan, seek to markers in case of padding + 0.94 STBI_NO_STDIO to disable stdio usage; rename all #defines the same + 0.93 handle jpegtran output; verbose errors + 0.92 read 4,8,16,24,32-bit BMP files of several formats + 0.91 output 24-bit Windows 3.0 BMP files + 0.90 fix a few more warnings; bump version number to approach 1.0 + 0.61 bugfixes due to Marc LeBlanc, Christopher Lloyd + 0.60 fix compiling as c++ + 0.59 fix warnings: merge Dave Moore's -Wall fixes + 0.58 fix bug: zlib uncompressed mode len/nlen was wrong endian + 0.57 fix bug: jpg last huffman symbol before marker was >9 bits but less than 16 available + 0.56 fix bug: zlib uncompressed mode len vs. nlen + 0.55 fix bug: restart_interval not initialized to 0 + 0.54 allow NULL for 'int *comp' + 0.53 fix bug in png 3->4; speedup png decoding + 0.52 png handles req_comp=3,4 directly; minor cleanup; jpeg comments + 0.51 obey req_comp requests, 1-component jpegs return as 1-component, + on 'test' only check type, not whether we support this variant + 0.50 (2006-11-19) + first released version +*/ diff --git a/troposphere/daybreak/nanovg/include/nanovg/stb_truetype.h b/troposphere/daybreak/nanovg/include/nanovg/stb_truetype.h new file mode 100644 index 000000000..52e1c9461 --- /dev/null +++ b/troposphere/daybreak/nanovg/include/nanovg/stb_truetype.h @@ -0,0 +1,5011 @@ +// stb_truetype.h - v1.24 - public domain +// authored from 2009-2020 by Sean Barrett / RAD Game Tools +// +// ======================================================================= +// +// NO SECURITY GUARANTEE -- DO NOT USE THIS ON UNTRUSTED FONT FILES +// +// This library does no range checking of the offsets found in the file, +// meaning an attacker can use it to read arbitrary memory. +// +// ======================================================================= +// +// This library processes TrueType files: +// parse files +// extract glyph metrics +// extract glyph shapes +// render glyphs to one-channel bitmaps with antialiasing (box filter) +// render glyphs to one-channel SDF bitmaps (signed-distance field/function) +// +// Todo: +// non-MS cmaps +// crashproof on bad data +// hinting? (no longer patented) +// cleartype-style AA? +// optimize: use simple memory allocator for intermediates +// optimize: build edge-list directly from curves +// optimize: rasterize directly from curves? +// +// ADDITIONAL CONTRIBUTORS +// +// Mikko Mononen: compound shape support, more cmap formats +// Tor Andersson: kerning, subpixel rendering +// Dougall Johnson: OpenType / Type 2 font handling +// Daniel Ribeiro Maciel: basic GPOS-based kerning +// +// Misc other: +// Ryan Gordon +// Simon Glass +// github:IntellectualKitty +// Imanol Celaya +// Daniel Ribeiro Maciel +// +// Bug/warning reports/fixes: +// "Zer" on mollyrocket Fabian "ryg" Giesen github:NiLuJe +// Cass Everitt Martins Mozeiko github:aloucks +// stoiko (Haemimont Games) Cap Petschulat github:oyvindjam +// Brian Hook Omar Cornut github:vassvik +// Walter van Niftrik Ryan Griege +// David Gow Peter LaValle +// David Given Sergey Popov +// Ivan-Assen Ivanov Giumo X. Clanjor +// Anthony Pesch Higor Euripedes +// Johan Duparc Thomas Fields +// Hou Qiming Derek Vinyard +// Rob Loach Cort Stratton +// Kenney Phillis Jr. Brian Costabile +// Ken Voskuil (kaesve) +// +// VERSION HISTORY +// +// 1.24 (2020-02-05) fix warning +// 1.23 (2020-02-02) query SVG data for glyphs; query whole kerning table (but only kern not GPOS) +// 1.22 (2019-08-11) minimize missing-glyph duplication; fix kerning if both 'GPOS' and 'kern' are defined +// 1.21 (2019-02-25) fix warning +// 1.20 (2019-02-07) PackFontRange skips missing codepoints; GetScaleFontVMetrics() +// 1.19 (2018-02-11) GPOS kerning, STBTT_fmod +// 1.18 (2018-01-29) add missing function +// 1.17 (2017-07-23) make more arguments const; doc fix +// 1.16 (2017-07-12) SDF support +// 1.15 (2017-03-03) make more arguments const +// 1.14 (2017-01-16) num-fonts-in-TTC function +// 1.13 (2017-01-02) support OpenType fonts, certain Apple fonts +// 1.12 (2016-10-25) suppress warnings about casting away const with -Wcast-qual +// 1.11 (2016-04-02) fix unused-variable warning +// 1.10 (2016-04-02) user-defined fabs(); rare memory leak; remove duplicate typedef +// 1.09 (2016-01-16) warning fix; avoid crash on outofmem; use allocation userdata properly +// 1.08 (2015-09-13) document stbtt_Rasterize(); fixes for vertical & horizontal edges +// 1.07 (2015-08-01) allow PackFontRanges to accept arrays of sparse codepoints; +// variant PackFontRanges to pack and render in separate phases; +// fix stbtt_GetFontOFfsetForIndex (never worked for non-0 input?); +// fixed an assert() bug in the new rasterizer +// replace assert() with STBTT_assert() in new rasterizer +// +// Full history can be found at the end of this file. +// +// LICENSE +// +// See end of file for license information. +// +// USAGE +// +// Include this file in whatever places need to refer to it. In ONE C/C++ +// file, write: +// #define STB_TRUETYPE_IMPLEMENTATION +// before the #include of this file. This expands out the actual +// implementation into that C/C++ file. +// +// To make the implementation private to the file that generates the implementation, +// #define STBTT_STATIC +// +// Simple 3D API (don't ship this, but it's fine for tools and quick start) +// stbtt_BakeFontBitmap() -- bake a font to a bitmap for use as texture +// stbtt_GetBakedQuad() -- compute quad to draw for a given char +// +// Improved 3D API (more shippable): +// #include "stb_rect_pack.h" -- optional, but you really want it +// stbtt_PackBegin() +// stbtt_PackSetOversampling() -- for improved quality on small fonts +// stbtt_PackFontRanges() -- pack and renders +// stbtt_PackEnd() +// stbtt_GetPackedQuad() +// +// "Load" a font file from a memory buffer (you have to keep the buffer loaded) +// stbtt_InitFont() +// stbtt_GetFontOffsetForIndex() -- indexing for TTC font collections +// stbtt_GetNumberOfFonts() -- number of fonts for TTC font collections +// +// Render a unicode codepoint to a bitmap +// stbtt_GetCodepointBitmap() -- allocates and returns a bitmap +// stbtt_MakeCodepointBitmap() -- renders into bitmap you provide +// stbtt_GetCodepointBitmapBox() -- how big the bitmap must be +// +// Character advance/positioning +// stbtt_GetCodepointHMetrics() +// stbtt_GetFontVMetrics() +// stbtt_GetFontVMetricsOS2() +// stbtt_GetCodepointKernAdvance() +// +// Starting with version 1.06, the rasterizer was replaced with a new, +// faster and generally-more-precise rasterizer. The new rasterizer more +// accurately measures pixel coverage for anti-aliasing, except in the case +// where multiple shapes overlap, in which case it overestimates the AA pixel +// coverage. Thus, anti-aliasing of intersecting shapes may look wrong. If +// this turns out to be a problem, you can re-enable the old rasterizer with +// #define STBTT_RASTERIZER_VERSION 1 +// which will incur about a 15% speed hit. +// +// ADDITIONAL DOCUMENTATION +// +// Immediately after this block comment are a series of sample programs. +// +// After the sample programs is the "header file" section. This section +// includes documentation for each API function. +// +// Some important concepts to understand to use this library: +// +// Codepoint +// Characters are defined by unicode codepoints, e.g. 65 is +// uppercase A, 231 is lowercase c with a cedilla, 0x7e30 is +// the hiragana for "ma". +// +// Glyph +// A visual character shape (every codepoint is rendered as +// some glyph) +// +// Glyph index +// A font-specific integer ID representing a glyph +// +// Baseline +// Glyph shapes are defined relative to a baseline, which is the +// bottom of uppercase characters. Characters extend both above +// and below the baseline. +// +// Current Point +// As you draw text to the screen, you keep track of a "current point" +// which is the origin of each character. The current point's vertical +// position is the baseline. Even "baked fonts" use this model. +// +// Vertical Font Metrics +// The vertical qualities of the font, used to vertically position +// and space the characters. See docs for stbtt_GetFontVMetrics. +// +// Font Size in Pixels or Points +// The preferred interface for specifying font sizes in stb_truetype +// is to specify how tall the font's vertical extent should be in pixels. +// If that sounds good enough, skip the next paragraph. +// +// Most font APIs instead use "points", which are a common typographic +// measurement for describing font size, defined as 72 points per inch. +// stb_truetype provides a point API for compatibility. However, true +// "per inch" conventions don't make much sense on computer displays +// since different monitors have different number of pixels per +// inch. For example, Windows traditionally uses a convention that +// there are 96 pixels per inch, thus making 'inch' measurements have +// nothing to do with inches, and thus effectively defining a point to +// be 1.333 pixels. Additionally, the TrueType font data provides +// an explicit scale factor to scale a given font's glyphs to points, +// but the author has observed that this scale factor is often wrong +// for non-commercial fonts, thus making fonts scaled in points +// according to the TrueType spec incoherently sized in practice. +// +// DETAILED USAGE: +// +// Scale: +// Select how high you want the font to be, in points or pixels. +// Call ScaleForPixelHeight or ScaleForMappingEmToPixels to compute +// a scale factor SF that will be used by all other functions. +// +// Baseline: +// You need to select a y-coordinate that is the baseline of where +// your text will appear. Call GetFontBoundingBox to get the baseline-relative +// bounding box for all characters. SF*-y0 will be the distance in pixels +// that the worst-case character could extend above the baseline, so if +// you want the top edge of characters to appear at the top of the +// screen where y=0, then you would set the baseline to SF*-y0. +// +// Current point: +// Set the current point where the first character will appear. The +// first character could extend left of the current point; this is font +// dependent. You can either choose a current point that is the leftmost +// point and hope, or add some padding, or check the bounding box or +// left-side-bearing of the first character to be displayed and set +// the current point based on that. +// +// Displaying a character: +// Compute the bounding box of the character. It will contain signed values +// relative to . I.e. if it returns x0,y0,x1,y1, +// then the character should be displayed in the rectangle from +// to = 32 && *text < 128) { + stbtt_aligned_quad q; + stbtt_GetBakedQuad(cdata, 512,512, *text-32, &x,&y,&q,1);//1=opengl & d3d10+,0=d3d9 + glTexCoord2f(q.s0,q.t1); glVertex2f(q.x0,q.y0); + glTexCoord2f(q.s1,q.t1); glVertex2f(q.x1,q.y0); + glTexCoord2f(q.s1,q.t0); glVertex2f(q.x1,q.y1); + glTexCoord2f(q.s0,q.t0); glVertex2f(q.x0,q.y1); + } + ++text; + } + glEnd(); +} +#endif +// +// +////////////////////////////////////////////////////////////////////////////// +// +// Complete program (this compiles): get a single bitmap, print as ASCII art +// +#if 0 +#include +#define STB_TRUETYPE_IMPLEMENTATION // force following include to generate implementation +#include "stb_truetype.h" + +char ttf_buffer[1<<25]; + +int main(int argc, char **argv) +{ + stbtt_fontinfo font; + unsigned char *bitmap; + int w,h,i,j,c = (argc > 1 ? atoi(argv[1]) : 'a'), s = (argc > 2 ? atoi(argv[2]) : 20); + + fread(ttf_buffer, 1, 1<<25, fopen(argc > 3 ? argv[3] : "c:/windows/fonts/arialbd.ttf", "rb")); + + stbtt_InitFont(&font, ttf_buffer, stbtt_GetFontOffsetForIndex(ttf_buffer,0)); + bitmap = stbtt_GetCodepointBitmap(&font, 0,stbtt_ScaleForPixelHeight(&font, s), c, &w, &h, 0,0); + + for (j=0; j < h; ++j) { + for (i=0; i < w; ++i) + putchar(" .:ioVM@"[bitmap[j*w+i]>>5]); + putchar('\n'); + } + return 0; +} +#endif +// +// Output: +// +// .ii. +// @@@@@@. +// V@Mio@@o +// :i. V@V +// :oM@@M +// :@@@MM@M +// @@o o@M +// :@@. M@M +// @@@o@@@@ +// :M@@V:@@. +// +////////////////////////////////////////////////////////////////////////////// +// +// Complete program: print "Hello World!" banner, with bugs +// +#if 0 +char buffer[24<<20]; +unsigned char screen[20][79]; + +int main(int arg, char **argv) +{ + stbtt_fontinfo font; + int i,j,ascent,baseline,ch=0; + float scale, xpos=2; // leave a little padding in case the character extends left + char *text = "Heljo World!"; // intentionally misspelled to show 'lj' brokenness + + fread(buffer, 1, 1000000, fopen("c:/windows/fonts/arialbd.ttf", "rb")); + stbtt_InitFont(&font, buffer, 0); + + scale = stbtt_ScaleForPixelHeight(&font, 15); + stbtt_GetFontVMetrics(&font, &ascent,0,0); + baseline = (int) (ascent*scale); + + while (text[ch]) { + int advance,lsb,x0,y0,x1,y1; + float x_shift = xpos - (float) floor(xpos); + stbtt_GetCodepointHMetrics(&font, text[ch], &advance, &lsb); + stbtt_GetCodepointBitmapBoxSubpixel(&font, text[ch], scale,scale,x_shift,0, &x0,&y0,&x1,&y1); + stbtt_MakeCodepointBitmapSubpixel(&font, &screen[baseline + y0][(int) xpos + x0], x1-x0,y1-y0, 79, scale,scale,x_shift,0, text[ch]); + // note that this stomps the old data, so where character boxes overlap (e.g. 'lj') it's wrong + // because this API is really for baking character bitmaps into textures. if you want to render + // a sequence of characters, you really need to render each bitmap to a temp buffer, then + // "alpha blend" that into the working buffer + xpos += (advance * scale); + if (text[ch+1]) + xpos += scale*stbtt_GetCodepointKernAdvance(&font, text[ch],text[ch+1]); + ++ch; + } + + for (j=0; j < 20; ++j) { + for (i=0; i < 78; ++i) + putchar(" .:ioVM@"[screen[j][i]>>5]); + putchar('\n'); + } + + return 0; +} +#endif + + +////////////////////////////////////////////////////////////////////////////// +////////////////////////////////////////////////////////////////////////////// +//// +//// INTEGRATION WITH YOUR CODEBASE +//// +//// The following sections allow you to supply alternate definitions +//// of C library functions used by stb_truetype, e.g. if you don't +//// link with the C runtime library. + +#ifdef STB_TRUETYPE_IMPLEMENTATION + // #define your own (u)stbtt_int8/16/32 before including to override this + #ifndef stbtt_uint8 + typedef unsigned char stbtt_uint8; + typedef signed char stbtt_int8; + typedef unsigned short stbtt_uint16; + typedef signed short stbtt_int16; + typedef unsigned int stbtt_uint32; + typedef signed int stbtt_int32; + #endif + + typedef char stbtt__check_size32[sizeof(stbtt_int32)==4 ? 1 : -1]; + typedef char stbtt__check_size16[sizeof(stbtt_int16)==2 ? 1 : -1]; + + // e.g. #define your own STBTT_ifloor/STBTT_iceil() to avoid math.h + #ifndef STBTT_ifloor + #include + #define STBTT_ifloor(x) ((int) floor(x)) + #define STBTT_iceil(x) ((int) ceil(x)) + #endif + + #ifndef STBTT_sqrt + #include + #define STBTT_sqrt(x) sqrt(x) + #define STBTT_pow(x,y) pow(x,y) + #endif + + #ifndef STBTT_fmod + #include + #define STBTT_fmod(x,y) fmod(x,y) + #endif + + #ifndef STBTT_cos + #include + #define STBTT_cos(x) cos(x) + #define STBTT_acos(x) acos(x) + #endif + + #ifndef STBTT_fabs + #include + #define STBTT_fabs(x) fabs(x) + #endif + + // #define your own functions "STBTT_malloc" / "STBTT_free" to avoid malloc.h + #ifndef STBTT_malloc + #include + #define STBTT_malloc(x,u) ((void)(u),malloc(x)) + #define STBTT_free(x,u) ((void)(u),free(x)) + #endif + + #ifndef STBTT_assert + #include + #define STBTT_assert(x) assert(x) + #endif + + #ifndef STBTT_strlen + #include + #define STBTT_strlen(x) strlen(x) + #endif + + #ifndef STBTT_memcpy + #include + #define STBTT_memcpy memcpy + #define STBTT_memset memset + #endif +#endif + +/////////////////////////////////////////////////////////////////////////////// +/////////////////////////////////////////////////////////////////////////////// +//// +//// INTERFACE +//// +//// + +#ifndef __STB_INCLUDE_STB_TRUETYPE_H__ +#define __STB_INCLUDE_STB_TRUETYPE_H__ + +#ifdef STBTT_STATIC +#define STBTT_DEF static +#else +#define STBTT_DEF extern +#endif + +#ifdef __cplusplus +extern "C" { +#endif + +// private structure +typedef struct +{ + unsigned char *data; + int cursor; + int size; +} stbtt__buf; + +////////////////////////////////////////////////////////////////////////////// +// +// TEXTURE BAKING API +// +// If you use this API, you only have to call two functions ever. +// + +typedef struct +{ + unsigned short x0,y0,x1,y1; // coordinates of bbox in bitmap + float xoff,yoff,xadvance; +} stbtt_bakedchar; + +STBTT_DEF int stbtt_BakeFontBitmap(const unsigned char *data, int offset, // font location (use offset=0 for plain .ttf) + float pixel_height, // height of font in pixels + unsigned char *pixels, int pw, int ph, // bitmap to be filled in + int first_char, int num_chars, // characters to bake + stbtt_bakedchar *chardata); // you allocate this, it's num_chars long +// if return is positive, the first unused row of the bitmap +// if return is negative, returns the negative of the number of characters that fit +// if return is 0, no characters fit and no rows were used +// This uses a very crappy packing. + +typedef struct +{ + float x0,y0,s0,t0; // top-left + float x1,y1,s1,t1; // bottom-right +} stbtt_aligned_quad; + +STBTT_DEF void stbtt_GetBakedQuad(const stbtt_bakedchar *chardata, int pw, int ph, // same data as above + int char_index, // character to display + float *xpos, float *ypos, // pointers to current position in screen pixel space + stbtt_aligned_quad *q, // output: quad to draw + int opengl_fillrule); // true if opengl fill rule; false if DX9 or earlier +// Call GetBakedQuad with char_index = 'character - first_char', and it +// creates the quad you need to draw and advances the current position. +// +// The coordinate system used assumes y increases downwards. +// +// Characters will extend both above and below the current position; +// see discussion of "BASELINE" above. +// +// It's inefficient; you might want to c&p it and optimize it. + +STBTT_DEF void stbtt_GetScaledFontVMetrics(const unsigned char *fontdata, int index, float size, float *ascent, float *descent, float *lineGap); +// Query the font vertical metrics without having to create a font first. + + +////////////////////////////////////////////////////////////////////////////// +// +// NEW TEXTURE BAKING API +// +// This provides options for packing multiple fonts into one atlas, not +// perfectly but better than nothing. + +typedef struct +{ + unsigned short x0,y0,x1,y1; // coordinates of bbox in bitmap + float xoff,yoff,xadvance; + float xoff2,yoff2; +} stbtt_packedchar; + +typedef struct stbtt_pack_context stbtt_pack_context; +typedef struct stbtt_fontinfo stbtt_fontinfo; +#ifndef STB_RECT_PACK_VERSION +typedef struct stbrp_rect stbrp_rect; +#endif + +STBTT_DEF int stbtt_PackBegin(stbtt_pack_context *spc, unsigned char *pixels, int width, int height, int stride_in_bytes, int padding, void *alloc_context); +// Initializes a packing context stored in the passed-in stbtt_pack_context. +// Future calls using this context will pack characters into the bitmap passed +// in here: a 1-channel bitmap that is width * height. stride_in_bytes is +// the distance from one row to the next (or 0 to mean they are packed tightly +// together). "padding" is the amount of padding to leave between each +// character (normally you want '1' for bitmaps you'll use as textures with +// bilinear filtering). +// +// Returns 0 on failure, 1 on success. + +STBTT_DEF void stbtt_PackEnd (stbtt_pack_context *spc); +// Cleans up the packing context and frees all memory. + +#define STBTT_POINT_SIZE(x) (-(x)) + +STBTT_DEF int stbtt_PackFontRange(stbtt_pack_context *spc, const unsigned char *fontdata, int font_index, float font_size, + int first_unicode_char_in_range, int num_chars_in_range, stbtt_packedchar *chardata_for_range); +// Creates character bitmaps from the font_index'th font found in fontdata (use +// font_index=0 if you don't know what that is). It creates num_chars_in_range +// bitmaps for characters with unicode values starting at first_unicode_char_in_range +// and increasing. Data for how to render them is stored in chardata_for_range; +// pass these to stbtt_GetPackedQuad to get back renderable quads. +// +// font_size is the full height of the character from ascender to descender, +// as computed by stbtt_ScaleForPixelHeight. To use a point size as computed +// by stbtt_ScaleForMappingEmToPixels, wrap the point size in STBTT_POINT_SIZE() +// and pass that result as 'font_size': +// ..., 20 , ... // font max minus min y is 20 pixels tall +// ..., STBTT_POINT_SIZE(20), ... // 'M' is 20 pixels tall + +typedef struct +{ + float font_size; + int first_unicode_codepoint_in_range; // if non-zero, then the chars are continuous, and this is the first codepoint + int *array_of_unicode_codepoints; // if non-zero, then this is an array of unicode codepoints + int num_chars; + stbtt_packedchar *chardata_for_range; // output + unsigned char h_oversample, v_oversample; // don't set these, they're used internally +} stbtt_pack_range; + +STBTT_DEF int stbtt_PackFontRanges(stbtt_pack_context *spc, const unsigned char *fontdata, int font_index, stbtt_pack_range *ranges, int num_ranges); +// Creates character bitmaps from multiple ranges of characters stored in +// ranges. This will usually create a better-packed bitmap than multiple +// calls to stbtt_PackFontRange. Note that you can call this multiple +// times within a single PackBegin/PackEnd. + +STBTT_DEF void stbtt_PackSetOversampling(stbtt_pack_context *spc, unsigned int h_oversample, unsigned int v_oversample); +// Oversampling a font increases the quality by allowing higher-quality subpixel +// positioning, and is especially valuable at smaller text sizes. +// +// This function sets the amount of oversampling for all following calls to +// stbtt_PackFontRange(s) or stbtt_PackFontRangesGatherRects for a given +// pack context. The default (no oversampling) is achieved by h_oversample=1 +// and v_oversample=1. The total number of pixels required is +// h_oversample*v_oversample larger than the default; for example, 2x2 +// oversampling requires 4x the storage of 1x1. For best results, render +// oversampled textures with bilinear filtering. Look at the readme in +// stb/tests/oversample for information about oversampled fonts +// +// To use with PackFontRangesGather etc., you must set it before calls +// call to PackFontRangesGatherRects. + +STBTT_DEF void stbtt_PackSetSkipMissingCodepoints(stbtt_pack_context *spc, int skip); +// If skip != 0, this tells stb_truetype to skip any codepoints for which +// there is no corresponding glyph. If skip=0, which is the default, then +// codepoints without a glyph recived the font's "missing character" glyph, +// typically an empty box by convention. + +STBTT_DEF void stbtt_GetPackedQuad(const stbtt_packedchar *chardata, int pw, int ph, // same data as above + int char_index, // character to display + float *xpos, float *ypos, // pointers to current position in screen pixel space + stbtt_aligned_quad *q, // output: quad to draw + int align_to_integer); + +STBTT_DEF int stbtt_PackFontRangesGatherRects(stbtt_pack_context *spc, const stbtt_fontinfo *info, stbtt_pack_range *ranges, int num_ranges, stbrp_rect *rects); +STBTT_DEF void stbtt_PackFontRangesPackRects(stbtt_pack_context *spc, stbrp_rect *rects, int num_rects); +STBTT_DEF int stbtt_PackFontRangesRenderIntoRects(stbtt_pack_context *spc, const stbtt_fontinfo *info, stbtt_pack_range *ranges, int num_ranges, stbrp_rect *rects); +// Calling these functions in sequence is roughly equivalent to calling +// stbtt_PackFontRanges(). If you more control over the packing of multiple +// fonts, or if you want to pack custom data into a font texture, take a look +// at the source to of stbtt_PackFontRanges() and create a custom version +// using these functions, e.g. call GatherRects multiple times, +// building up a single array of rects, then call PackRects once, +// then call RenderIntoRects repeatedly. This may result in a +// better packing than calling PackFontRanges multiple times +// (or it may not). + +// this is an opaque structure that you shouldn't mess with which holds +// all the context needed from PackBegin to PackEnd. +struct stbtt_pack_context { + void *user_allocator_context; + void *pack_info; + int width; + int height; + int stride_in_bytes; + int padding; + int skip_missing; + unsigned int h_oversample, v_oversample; + unsigned char *pixels; + void *nodes; +}; + +////////////////////////////////////////////////////////////////////////////// +// +// FONT LOADING +// +// + +STBTT_DEF int stbtt_GetNumberOfFonts(const unsigned char *data); +// This function will determine the number of fonts in a font file. TrueType +// collection (.ttc) files may contain multiple fonts, while TrueType font +// (.ttf) files only contain one font. The number of fonts can be used for +// indexing with the previous function where the index is between zero and one +// less than the total fonts. If an error occurs, -1 is returned. + +STBTT_DEF int stbtt_GetFontOffsetForIndex(const unsigned char *data, int index); +// Each .ttf/.ttc file may have more than one font. Each font has a sequential +// index number starting from 0. Call this function to get the font offset for +// a given index; it returns -1 if the index is out of range. A regular .ttf +// file will only define one font and it always be at offset 0, so it will +// return '0' for index 0, and -1 for all other indices. + +// The following structure is defined publicly so you can declare one on +// the stack or as a global or etc, but you should treat it as opaque. +struct stbtt_fontinfo +{ + void * userdata; + unsigned char * data; // pointer to .ttf file + int fontstart; // offset of start of font + + int numGlyphs; // number of glyphs, needed for range checking + + int loca,head,glyf,hhea,hmtx,kern,gpos,svg; // table locations as offset from start of .ttf + int index_map; // a cmap mapping for our chosen character encoding + int indexToLocFormat; // format needed to map from glyph index to glyph + + stbtt__buf cff; // cff font data + stbtt__buf charstrings; // the charstring index + stbtt__buf gsubrs; // global charstring subroutines index + stbtt__buf subrs; // private charstring subroutines index + stbtt__buf fontdicts; // array of font dicts + stbtt__buf fdselect; // map from glyph to fontdict +}; + +STBTT_DEF int stbtt_InitFont(stbtt_fontinfo *info, const unsigned char *data, int offset); +// Given an offset into the file that defines a font, this function builds +// the necessary cached info for the rest of the system. You must allocate +// the stbtt_fontinfo yourself, and stbtt_InitFont will fill it out. You don't +// need to do anything special to free it, because the contents are pure +// value data with no additional data structures. Returns 0 on failure. + + +////////////////////////////////////////////////////////////////////////////// +// +// CHARACTER TO GLYPH-INDEX CONVERSIOn + +STBTT_DEF int stbtt_FindGlyphIndex(const stbtt_fontinfo *info, int unicode_codepoint); +// If you're going to perform multiple operations on the same character +// and you want a speed-up, call this function with the character you're +// going to process, then use glyph-based functions instead of the +// codepoint-based functions. +// Returns 0 if the character codepoint is not defined in the font. + + +////////////////////////////////////////////////////////////////////////////// +// +// CHARACTER PROPERTIES +// + +STBTT_DEF float stbtt_ScaleForPixelHeight(const stbtt_fontinfo *info, float pixels); +// computes a scale factor to produce a font whose "height" is 'pixels' tall. +// Height is measured as the distance from the highest ascender to the lowest +// descender; in other words, it's equivalent to calling stbtt_GetFontVMetrics +// and computing: +// scale = pixels / (ascent - descent) +// so if you prefer to measure height by the ascent only, use a similar calculation. + +STBTT_DEF float stbtt_ScaleForMappingEmToPixels(const stbtt_fontinfo *info, float pixels); +// computes a scale factor to produce a font whose EM size is mapped to +// 'pixels' tall. This is probably what traditional APIs compute, but +// I'm not positive. + +STBTT_DEF void stbtt_GetFontVMetrics(const stbtt_fontinfo *info, int *ascent, int *descent, int *lineGap); +// ascent is the coordinate above the baseline the font extends; descent +// is the coordinate below the baseline the font extends (i.e. it is typically negative) +// lineGap is the spacing between one row's descent and the next row's ascent... +// so you should advance the vertical position by "*ascent - *descent + *lineGap" +// these are expressed in unscaled coordinates, so you must multiply by +// the scale factor for a given size + +STBTT_DEF int stbtt_GetFontVMetricsOS2(const stbtt_fontinfo *info, int *typoAscent, int *typoDescent, int *typoLineGap); +// analogous to GetFontVMetrics, but returns the "typographic" values from the OS/2 +// table (specific to MS/Windows TTF files). +// +// Returns 1 on success (table present), 0 on failure. + +STBTT_DEF void stbtt_GetFontBoundingBox(const stbtt_fontinfo *info, int *x0, int *y0, int *x1, int *y1); +// the bounding box around all possible characters + +STBTT_DEF void stbtt_GetCodepointHMetrics(const stbtt_fontinfo *info, int codepoint, int *advanceWidth, int *leftSideBearing); +// leftSideBearing is the offset from the current horizontal position to the left edge of the character +// advanceWidth is the offset from the current horizontal position to the next horizontal position +// these are expressed in unscaled coordinates + +STBTT_DEF int stbtt_GetCodepointKernAdvance(const stbtt_fontinfo *info, int ch1, int ch2); +// an additional amount to add to the 'advance' value between ch1 and ch2 + +STBTT_DEF int stbtt_GetCodepointBox(const stbtt_fontinfo *info, int codepoint, int *x0, int *y0, int *x1, int *y1); +// Gets the bounding box of the visible part of the glyph, in unscaled coordinates + +STBTT_DEF void stbtt_GetGlyphHMetrics(const stbtt_fontinfo *info, int glyph_index, int *advanceWidth, int *leftSideBearing); +STBTT_DEF int stbtt_GetGlyphKernAdvance(const stbtt_fontinfo *info, int glyph1, int glyph2); +STBTT_DEF int stbtt_GetGlyphBox(const stbtt_fontinfo *info, int glyph_index, int *x0, int *y0, int *x1, int *y1); +// as above, but takes one or more glyph indices for greater efficiency + +typedef struct stbtt_kerningentry +{ + int glyph1; // use stbtt_FindGlyphIndex + int glyph2; + int advance; +} stbtt_kerningentry; + +STBTT_DEF int stbtt_GetKerningTableLength(const stbtt_fontinfo *info); +STBTT_DEF int stbtt_GetKerningTable(const stbtt_fontinfo *info, stbtt_kerningentry* table, int table_length); +// Retrieves a complete list of all of the kerning pairs provided by the font +// stbtt_GetKerningTable never writes more than table_length entries and returns how many entries it did write. +// The table will be sorted by (a.glyph1 == b.glyph1)?(a.glyph2 < b.glyph2):(a.glyph1 < b.glyph1) + +////////////////////////////////////////////////////////////////////////////// +// +// GLYPH SHAPES (you probably don't need these, but they have to go before +// the bitmaps for C declaration-order reasons) +// + +#ifndef STBTT_vmove // you can predefine these to use different values (but why?) + enum { + STBTT_vmove=1, + STBTT_vline, + STBTT_vcurve, + STBTT_vcubic + }; +#endif + +#ifndef stbtt_vertex // you can predefine this to use different values + // (we share this with other code at RAD) + #define stbtt_vertex_type short // can't use stbtt_int16 because that's not visible in the header file + typedef struct + { + stbtt_vertex_type x,y,cx,cy,cx1,cy1; + unsigned char type,padding; + } stbtt_vertex; +#endif + +STBTT_DEF int stbtt_IsGlyphEmpty(const stbtt_fontinfo *info, int glyph_index); +// returns non-zero if nothing is drawn for this glyph + +STBTT_DEF int stbtt_GetCodepointShape(const stbtt_fontinfo *info, int unicode_codepoint, stbtt_vertex **vertices); +STBTT_DEF int stbtt_GetGlyphShape(const stbtt_fontinfo *info, int glyph_index, stbtt_vertex **vertices); +// returns # of vertices and fills *vertices with the pointer to them +// these are expressed in "unscaled" coordinates +// +// The shape is a series of contours. Each one starts with +// a STBTT_moveto, then consists of a series of mixed +// STBTT_lineto and STBTT_curveto segments. A lineto +// draws a line from previous endpoint to its x,y; a curveto +// draws a quadratic bezier from previous endpoint to +// its x,y, using cx,cy as the bezier control point. + +STBTT_DEF void stbtt_FreeShape(const stbtt_fontinfo *info, stbtt_vertex *vertices); +// frees the data allocated above + +STBTT_DEF int stbtt_GetCodepointSVG(const stbtt_fontinfo *info, int unicode_codepoint, const char **svg); +STBTT_DEF int stbtt_GetGlyphSVG(const stbtt_fontinfo *info, int gl, const char **svg); +// fills svg with the character's SVG data. +// returns data size or 0 if SVG not found. + +////////////////////////////////////////////////////////////////////////////// +// +// BITMAP RENDERING +// + +STBTT_DEF void stbtt_FreeBitmap(unsigned char *bitmap, void *userdata); +// frees the bitmap allocated below + +STBTT_DEF unsigned char *stbtt_GetCodepointBitmap(const stbtt_fontinfo *info, float scale_x, float scale_y, int codepoint, int *width, int *height, int *xoff, int *yoff); +// allocates a large-enough single-channel 8bpp bitmap and renders the +// specified character/glyph at the specified scale into it, with +// antialiasing. 0 is no coverage (transparent), 255 is fully covered (opaque). +// *width & *height are filled out with the width & height of the bitmap, +// which is stored left-to-right, top-to-bottom. +// +// xoff/yoff are the offset it pixel space from the glyph origin to the top-left of the bitmap + +STBTT_DEF unsigned char *stbtt_GetCodepointBitmapSubpixel(const stbtt_fontinfo *info, float scale_x, float scale_y, float shift_x, float shift_y, int codepoint, int *width, int *height, int *xoff, int *yoff); +// the same as stbtt_GetCodepoitnBitmap, but you can specify a subpixel +// shift for the character + +STBTT_DEF void stbtt_MakeCodepointBitmap(const stbtt_fontinfo *info, unsigned char *output, int out_w, int out_h, int out_stride, float scale_x, float scale_y, int codepoint); +// the same as stbtt_GetCodepointBitmap, but you pass in storage for the bitmap +// in the form of 'output', with row spacing of 'out_stride' bytes. the bitmap +// is clipped to out_w/out_h bytes. Call stbtt_GetCodepointBitmapBox to get the +// width and height and positioning info for it first. + +STBTT_DEF void stbtt_MakeCodepointBitmapSubpixel(const stbtt_fontinfo *info, unsigned char *output, int out_w, int out_h, int out_stride, float scale_x, float scale_y, float shift_x, float shift_y, int codepoint); +// same as stbtt_MakeCodepointBitmap, but you can specify a subpixel +// shift for the character + +STBTT_DEF void stbtt_MakeCodepointBitmapSubpixelPrefilter(const stbtt_fontinfo *info, unsigned char *output, int out_w, int out_h, int out_stride, float scale_x, float scale_y, float shift_x, float shift_y, int oversample_x, int oversample_y, float *sub_x, float *sub_y, int codepoint); +// same as stbtt_MakeCodepointBitmapSubpixel, but prefiltering +// is performed (see stbtt_PackSetOversampling) + +STBTT_DEF void stbtt_GetCodepointBitmapBox(const stbtt_fontinfo *font, int codepoint, float scale_x, float scale_y, int *ix0, int *iy0, int *ix1, int *iy1); +// get the bbox of the bitmap centered around the glyph origin; so the +// bitmap width is ix1-ix0, height is iy1-iy0, and location to place +// the bitmap top left is (leftSideBearing*scale,iy0). +// (Note that the bitmap uses y-increases-down, but the shape uses +// y-increases-up, so CodepointBitmapBox and CodepointBox are inverted.) + +STBTT_DEF void stbtt_GetCodepointBitmapBoxSubpixel(const stbtt_fontinfo *font, int codepoint, float scale_x, float scale_y, float shift_x, float shift_y, int *ix0, int *iy0, int *ix1, int *iy1); +// same as stbtt_GetCodepointBitmapBox, but you can specify a subpixel +// shift for the character + +// the following functions are equivalent to the above functions, but operate +// on glyph indices instead of Unicode codepoints (for efficiency) +STBTT_DEF unsigned char *stbtt_GetGlyphBitmap(const stbtt_fontinfo *info, float scale_x, float scale_y, int glyph, int *width, int *height, int *xoff, int *yoff); +STBTT_DEF unsigned char *stbtt_GetGlyphBitmapSubpixel(const stbtt_fontinfo *info, float scale_x, float scale_y, float shift_x, float shift_y, int glyph, int *width, int *height, int *xoff, int *yoff); +STBTT_DEF void stbtt_MakeGlyphBitmap(const stbtt_fontinfo *info, unsigned char *output, int out_w, int out_h, int out_stride, float scale_x, float scale_y, int glyph); +STBTT_DEF void stbtt_MakeGlyphBitmapSubpixel(const stbtt_fontinfo *info, unsigned char *output, int out_w, int out_h, int out_stride, float scale_x, float scale_y, float shift_x, float shift_y, int glyph); +STBTT_DEF void stbtt_MakeGlyphBitmapSubpixelPrefilter(const stbtt_fontinfo *info, unsigned char *output, int out_w, int out_h, int out_stride, float scale_x, float scale_y, float shift_x, float shift_y, int oversample_x, int oversample_y, float *sub_x, float *sub_y, int glyph); +STBTT_DEF void stbtt_GetGlyphBitmapBox(const stbtt_fontinfo *font, int glyph, float scale_x, float scale_y, int *ix0, int *iy0, int *ix1, int *iy1); +STBTT_DEF void stbtt_GetGlyphBitmapBoxSubpixel(const stbtt_fontinfo *font, int glyph, float scale_x, float scale_y,float shift_x, float shift_y, int *ix0, int *iy0, int *ix1, int *iy1); + + +// @TODO: don't expose this structure +typedef struct +{ + int w,h,stride; + unsigned char *pixels; +} stbtt__bitmap; + +// rasterize a shape with quadratic beziers into a bitmap +STBTT_DEF void stbtt_Rasterize(stbtt__bitmap *result, // 1-channel bitmap to draw into + float flatness_in_pixels, // allowable error of curve in pixels + stbtt_vertex *vertices, // array of vertices defining shape + int num_verts, // number of vertices in above array + float scale_x, float scale_y, // scale applied to input vertices + float shift_x, float shift_y, // translation applied to input vertices + int x_off, int y_off, // another translation applied to input + int invert, // if non-zero, vertically flip shape + void *userdata); // context for to STBTT_MALLOC + +////////////////////////////////////////////////////////////////////////////// +// +// Signed Distance Function (or Field) rendering + +STBTT_DEF void stbtt_FreeSDF(unsigned char *bitmap, void *userdata); +// frees the SDF bitmap allocated below + +STBTT_DEF unsigned char * stbtt_GetGlyphSDF(const stbtt_fontinfo *info, float scale, int glyph, int padding, unsigned char onedge_value, float pixel_dist_scale, int *width, int *height, int *xoff, int *yoff); +STBTT_DEF unsigned char * stbtt_GetCodepointSDF(const stbtt_fontinfo *info, float scale, int codepoint, int padding, unsigned char onedge_value, float pixel_dist_scale, int *width, int *height, int *xoff, int *yoff); +// These functions compute a discretized SDF field for a single character, suitable for storing +// in a single-channel texture, sampling with bilinear filtering, and testing against +// larger than some threshold to produce scalable fonts. +// info -- the font +// scale -- controls the size of the resulting SDF bitmap, same as it would be creating a regular bitmap +// glyph/codepoint -- the character to generate the SDF for +// padding -- extra "pixels" around the character which are filled with the distance to the character (not 0), +// which allows effects like bit outlines +// onedge_value -- value 0-255 to test the SDF against to reconstruct the character (i.e. the isocontour of the character) +// pixel_dist_scale -- what value the SDF should increase by when moving one SDF "pixel" away from the edge (on the 0..255 scale) +// if positive, > onedge_value is inside; if negative, < onedge_value is inside +// width,height -- output height & width of the SDF bitmap (including padding) +// xoff,yoff -- output origin of the character +// return value -- a 2D array of bytes 0..255, width*height in size +// +// pixel_dist_scale & onedge_value are a scale & bias that allows you to make +// optimal use of the limited 0..255 for your application, trading off precision +// and special effects. SDF values outside the range 0..255 are clamped to 0..255. +// +// Example: +// scale = stbtt_ScaleForPixelHeight(22) +// padding = 5 +// onedge_value = 180 +// pixel_dist_scale = 180/5.0 = 36.0 +// +// This will create an SDF bitmap in which the character is about 22 pixels +// high but the whole bitmap is about 22+5+5=32 pixels high. To produce a filled +// shape, sample the SDF at each pixel and fill the pixel if the SDF value +// is greater than or equal to 180/255. (You'll actually want to antialias, +// which is beyond the scope of this example.) Additionally, you can compute +// offset outlines (e.g. to stroke the character border inside & outside, +// or only outside). For example, to fill outside the character up to 3 SDF +// pixels, you would compare against (180-36.0*3)/255 = 72/255. The above +// choice of variables maps a range from 5 pixels outside the shape to +// 2 pixels inside the shape to 0..255; this is intended primarily for apply +// outside effects only (the interior range is needed to allow proper +// antialiasing of the font at *smaller* sizes) +// +// The function computes the SDF analytically at each SDF pixel, not by e.g. +// building a higher-res bitmap and approximating it. In theory the quality +// should be as high as possible for an SDF of this size & representation, but +// unclear if this is true in practice (perhaps building a higher-res bitmap +// and computing from that can allow drop-out prevention). +// +// The algorithm has not been optimized at all, so expect it to be slow +// if computing lots of characters or very large sizes. + + + +////////////////////////////////////////////////////////////////////////////// +// +// Finding the right font... +// +// You should really just solve this offline, keep your own tables +// of what font is what, and don't try to get it out of the .ttf file. +// That's because getting it out of the .ttf file is really hard, because +// the names in the file can appear in many possible encodings, in many +// possible languages, and e.g. if you need a case-insensitive comparison, +// the details of that depend on the encoding & language in a complex way +// (actually underspecified in truetype, but also gigantic). +// +// But you can use the provided functions in two possible ways: +// stbtt_FindMatchingFont() will use *case-sensitive* comparisons on +// unicode-encoded names to try to find the font you want; +// you can run this before calling stbtt_InitFont() +// +// stbtt_GetFontNameString() lets you get any of the various strings +// from the file yourself and do your own comparisons on them. +// You have to have called stbtt_InitFont() first. + + +STBTT_DEF int stbtt_FindMatchingFont(const unsigned char *fontdata, const char *name, int flags); +// returns the offset (not index) of the font that matches, or -1 if none +// if you use STBTT_MACSTYLE_DONTCARE, use a font name like "Arial Bold". +// if you use any other flag, use a font name like "Arial"; this checks +// the 'macStyle' header field; i don't know if fonts set this consistently +#define STBTT_MACSTYLE_DONTCARE 0 +#define STBTT_MACSTYLE_BOLD 1 +#define STBTT_MACSTYLE_ITALIC 2 +#define STBTT_MACSTYLE_UNDERSCORE 4 +#define STBTT_MACSTYLE_NONE 8 // <= not same as 0, this makes us check the bitfield is 0 + +STBTT_DEF int stbtt_CompareUTF8toUTF16_bigendian(const char *s1, int len1, const char *s2, int len2); +// returns 1/0 whether the first string interpreted as utf8 is identical to +// the second string interpreted as big-endian utf16... useful for strings from next func + +STBTT_DEF const char *stbtt_GetFontNameString(const stbtt_fontinfo *font, int *length, int platformID, int encodingID, int languageID, int nameID); +// returns the string (which may be big-endian double byte, e.g. for unicode) +// and puts the length in bytes in *length. +// +// some of the values for the IDs are below; for more see the truetype spec: +// http://developer.apple.com/textfonts/TTRefMan/RM06/Chap6name.html +// http://www.microsoft.com/typography/otspec/name.htm + +enum { // platformID + STBTT_PLATFORM_ID_UNICODE =0, + STBTT_PLATFORM_ID_MAC =1, + STBTT_PLATFORM_ID_ISO =2, + STBTT_PLATFORM_ID_MICROSOFT =3 +}; + +enum { // encodingID for STBTT_PLATFORM_ID_UNICODE + STBTT_UNICODE_EID_UNICODE_1_0 =0, + STBTT_UNICODE_EID_UNICODE_1_1 =1, + STBTT_UNICODE_EID_ISO_10646 =2, + STBTT_UNICODE_EID_UNICODE_2_0_BMP=3, + STBTT_UNICODE_EID_UNICODE_2_0_FULL=4 +}; + +enum { // encodingID for STBTT_PLATFORM_ID_MICROSOFT + STBTT_MS_EID_SYMBOL =0, + STBTT_MS_EID_UNICODE_BMP =1, + STBTT_MS_EID_SHIFTJIS =2, + STBTT_MS_EID_UNICODE_FULL =10 +}; + +enum { // encodingID for STBTT_PLATFORM_ID_MAC; same as Script Manager codes + STBTT_MAC_EID_ROMAN =0, STBTT_MAC_EID_ARABIC =4, + STBTT_MAC_EID_JAPANESE =1, STBTT_MAC_EID_HEBREW =5, + STBTT_MAC_EID_CHINESE_TRAD =2, STBTT_MAC_EID_GREEK =6, + STBTT_MAC_EID_KOREAN =3, STBTT_MAC_EID_RUSSIAN =7 +}; + +enum { // languageID for STBTT_PLATFORM_ID_MICROSOFT; same as LCID... + // problematic because there are e.g. 16 english LCIDs and 16 arabic LCIDs + STBTT_MS_LANG_ENGLISH =0x0409, STBTT_MS_LANG_ITALIAN =0x0410, + STBTT_MS_LANG_CHINESE =0x0804, STBTT_MS_LANG_JAPANESE =0x0411, + STBTT_MS_LANG_DUTCH =0x0413, STBTT_MS_LANG_KOREAN =0x0412, + STBTT_MS_LANG_FRENCH =0x040c, STBTT_MS_LANG_RUSSIAN =0x0419, + STBTT_MS_LANG_GERMAN =0x0407, STBTT_MS_LANG_SPANISH =0x0409, + STBTT_MS_LANG_HEBREW =0x040d, STBTT_MS_LANG_SWEDISH =0x041D +}; + +enum { // languageID for STBTT_PLATFORM_ID_MAC + STBTT_MAC_LANG_ENGLISH =0 , STBTT_MAC_LANG_JAPANESE =11, + STBTT_MAC_LANG_ARABIC =12, STBTT_MAC_LANG_KOREAN =23, + STBTT_MAC_LANG_DUTCH =4 , STBTT_MAC_LANG_RUSSIAN =32, + STBTT_MAC_LANG_FRENCH =1 , STBTT_MAC_LANG_SPANISH =6 , + STBTT_MAC_LANG_GERMAN =2 , STBTT_MAC_LANG_SWEDISH =5 , + STBTT_MAC_LANG_HEBREW =10, STBTT_MAC_LANG_CHINESE_SIMPLIFIED =33, + STBTT_MAC_LANG_ITALIAN =3 , STBTT_MAC_LANG_CHINESE_TRAD =19 +}; + +#ifdef __cplusplus +} +#endif + +#endif // __STB_INCLUDE_STB_TRUETYPE_H__ + +/////////////////////////////////////////////////////////////////////////////// +/////////////////////////////////////////////////////////////////////////////// +//// +//// IMPLEMENTATION +//// +//// + +#ifdef STB_TRUETYPE_IMPLEMENTATION + +#ifndef STBTT_MAX_OVERSAMPLE +#define STBTT_MAX_OVERSAMPLE 8 +#endif + +#if STBTT_MAX_OVERSAMPLE > 255 +#error "STBTT_MAX_OVERSAMPLE cannot be > 255" +#endif + +typedef int stbtt__test_oversample_pow2[(STBTT_MAX_OVERSAMPLE & (STBTT_MAX_OVERSAMPLE-1)) == 0 ? 1 : -1]; + +#ifndef STBTT_RASTERIZER_VERSION +#define STBTT_RASTERIZER_VERSION 2 +#endif + +#ifdef _MSC_VER +#define STBTT__NOTUSED(v) (void)(v) +#else +#define STBTT__NOTUSED(v) (void)sizeof(v) +#endif + +////////////////////////////////////////////////////////////////////////// +// +// stbtt__buf helpers to parse data from file +// + +static stbtt_uint8 stbtt__buf_get8(stbtt__buf *b) +{ + if (b->cursor >= b->size) + return 0; + return b->data[b->cursor++]; +} + +static stbtt_uint8 stbtt__buf_peek8(stbtt__buf *b) +{ + if (b->cursor >= b->size) + return 0; + return b->data[b->cursor]; +} + +static void stbtt__buf_seek(stbtt__buf *b, int o) +{ + STBTT_assert(!(o > b->size || o < 0)); + b->cursor = (o > b->size || o < 0) ? b->size : o; +} + +static void stbtt__buf_skip(stbtt__buf *b, int o) +{ + stbtt__buf_seek(b, b->cursor + o); +} + +static stbtt_uint32 stbtt__buf_get(stbtt__buf *b, int n) +{ + stbtt_uint32 v = 0; + int i; + STBTT_assert(n >= 1 && n <= 4); + for (i = 0; i < n; i++) + v = (v << 8) | stbtt__buf_get8(b); + return v; +} + +static stbtt__buf stbtt__new_buf(const void *p, size_t size) +{ + stbtt__buf r; + STBTT_assert(size < 0x40000000); + r.data = (stbtt_uint8*) p; + r.size = (int) size; + r.cursor = 0; + return r; +} + +#define stbtt__buf_get16(b) stbtt__buf_get((b), 2) +#define stbtt__buf_get32(b) stbtt__buf_get((b), 4) + +static stbtt__buf stbtt__buf_range(const stbtt__buf *b, int o, int s) +{ + stbtt__buf r = stbtt__new_buf(NULL, 0); + if (o < 0 || s < 0 || o > b->size || s > b->size - o) return r; + r.data = b->data + o; + r.size = s; + return r; +} + +static stbtt__buf stbtt__cff_get_index(stbtt__buf *b) +{ + int count, start, offsize; + start = b->cursor; + count = stbtt__buf_get16(b); + if (count) { + offsize = stbtt__buf_get8(b); + STBTT_assert(offsize >= 1 && offsize <= 4); + stbtt__buf_skip(b, offsize * count); + stbtt__buf_skip(b, stbtt__buf_get(b, offsize) - 1); + } + return stbtt__buf_range(b, start, b->cursor - start); +} + +static stbtt_uint32 stbtt__cff_int(stbtt__buf *b) +{ + int b0 = stbtt__buf_get8(b); + if (b0 >= 32 && b0 <= 246) return b0 - 139; + else if (b0 >= 247 && b0 <= 250) return (b0 - 247)*256 + stbtt__buf_get8(b) + 108; + else if (b0 >= 251 && b0 <= 254) return -(b0 - 251)*256 - stbtt__buf_get8(b) - 108; + else if (b0 == 28) return stbtt__buf_get16(b); + else if (b0 == 29) return stbtt__buf_get32(b); + STBTT_assert(0); + return 0; +} + +static void stbtt__cff_skip_operand(stbtt__buf *b) { + int v, b0 = stbtt__buf_peek8(b); + STBTT_assert(b0 >= 28); + if (b0 == 30) { + stbtt__buf_skip(b, 1); + while (b->cursor < b->size) { + v = stbtt__buf_get8(b); + if ((v & 0xF) == 0xF || (v >> 4) == 0xF) + break; + } + } else { + stbtt__cff_int(b); + } +} + +static stbtt__buf stbtt__dict_get(stbtt__buf *b, int key) +{ + stbtt__buf_seek(b, 0); + while (b->cursor < b->size) { + int start = b->cursor, end, op; + while (stbtt__buf_peek8(b) >= 28) + stbtt__cff_skip_operand(b); + end = b->cursor; + op = stbtt__buf_get8(b); + if (op == 12) op = stbtt__buf_get8(b) | 0x100; + if (op == key) return stbtt__buf_range(b, start, end-start); + } + return stbtt__buf_range(b, 0, 0); +} + +static void stbtt__dict_get_ints(stbtt__buf *b, int key, int outcount, stbtt_uint32 *out) +{ + int i; + stbtt__buf operands = stbtt__dict_get(b, key); + for (i = 0; i < outcount && operands.cursor < operands.size; i++) + out[i] = stbtt__cff_int(&operands); +} + +static int stbtt__cff_index_count(stbtt__buf *b) +{ + stbtt__buf_seek(b, 0); + return stbtt__buf_get16(b); +} + +static stbtt__buf stbtt__cff_index_get(stbtt__buf b, int i) +{ + int count, offsize, start, end; + stbtt__buf_seek(&b, 0); + count = stbtt__buf_get16(&b); + offsize = stbtt__buf_get8(&b); + STBTT_assert(i >= 0 && i < count); + STBTT_assert(offsize >= 1 && offsize <= 4); + stbtt__buf_skip(&b, i*offsize); + start = stbtt__buf_get(&b, offsize); + end = stbtt__buf_get(&b, offsize); + return stbtt__buf_range(&b, 2+(count+1)*offsize+start, end - start); +} + +////////////////////////////////////////////////////////////////////////// +// +// accessors to parse data from file +// + +// on platforms that don't allow misaligned reads, if we want to allow +// truetype fonts that aren't padded to alignment, define ALLOW_UNALIGNED_TRUETYPE + +#define ttBYTE(p) (* (stbtt_uint8 *) (p)) +#define ttCHAR(p) (* (stbtt_int8 *) (p)) +#define ttFixed(p) ttLONG(p) + +static stbtt_uint16 ttUSHORT(stbtt_uint8 *p) { return p[0]*256 + p[1]; } +static stbtt_int16 ttSHORT(stbtt_uint8 *p) { return p[0]*256 + p[1]; } +static stbtt_uint32 ttULONG(stbtt_uint8 *p) { return (p[0]<<24) + (p[1]<<16) + (p[2]<<8) + p[3]; } +static stbtt_int32 ttLONG(stbtt_uint8 *p) { return (p[0]<<24) + (p[1]<<16) + (p[2]<<8) + p[3]; } + +#define stbtt_tag4(p,c0,c1,c2,c3) ((p)[0] == (c0) && (p)[1] == (c1) && (p)[2] == (c2) && (p)[3] == (c3)) +#define stbtt_tag(p,str) stbtt_tag4(p,str[0],str[1],str[2],str[3]) + +static int stbtt__isfont(stbtt_uint8 *font) +{ + // check the version number + if (stbtt_tag4(font, '1',0,0,0)) return 1; // TrueType 1 + if (stbtt_tag(font, "typ1")) return 1; // TrueType with type 1 font -- we don't support this! + if (stbtt_tag(font, "OTTO")) return 1; // OpenType with CFF + if (stbtt_tag4(font, 0,1,0,0)) return 1; // OpenType 1.0 + if (stbtt_tag(font, "true")) return 1; // Apple specification for TrueType fonts + return 0; +} + +// @OPTIMIZE: binary search +static stbtt_uint32 stbtt__find_table(stbtt_uint8 *data, stbtt_uint32 fontstart, const char *tag) +{ + stbtt_int32 num_tables = ttUSHORT(data+fontstart+4); + stbtt_uint32 tabledir = fontstart + 12; + stbtt_int32 i; + for (i=0; i < num_tables; ++i) { + stbtt_uint32 loc = tabledir + 16*i; + if (stbtt_tag(data+loc+0, tag)) + return ttULONG(data+loc+8); + } + return 0; +} + +static int stbtt_GetFontOffsetForIndex_internal(unsigned char *font_collection, int index) +{ + // if it's just a font, there's only one valid index + if (stbtt__isfont(font_collection)) + return index == 0 ? 0 : -1; + + // check if it's a TTC + if (stbtt_tag(font_collection, "ttcf")) { + // version 1? + if (ttULONG(font_collection+4) == 0x00010000 || ttULONG(font_collection+4) == 0x00020000) { + stbtt_int32 n = ttLONG(font_collection+8); + if (index >= n) + return -1; + return ttULONG(font_collection+12+index*4); + } + } + return -1; +} + +static int stbtt_GetNumberOfFonts_internal(unsigned char *font_collection) +{ + // if it's just a font, there's only one valid font + if (stbtt__isfont(font_collection)) + return 1; + + // check if it's a TTC + if (stbtt_tag(font_collection, "ttcf")) { + // version 1? + if (ttULONG(font_collection+4) == 0x00010000 || ttULONG(font_collection+4) == 0x00020000) { + return ttLONG(font_collection+8); + } + } + return 0; +} + +static stbtt__buf stbtt__get_subrs(stbtt__buf cff, stbtt__buf fontdict) +{ + stbtt_uint32 subrsoff = 0, private_loc[2] = { 0, 0 }; + stbtt__buf pdict; + stbtt__dict_get_ints(&fontdict, 18, 2, private_loc); + if (!private_loc[1] || !private_loc[0]) return stbtt__new_buf(NULL, 0); + pdict = stbtt__buf_range(&cff, private_loc[1], private_loc[0]); + stbtt__dict_get_ints(&pdict, 19, 1, &subrsoff); + if (!subrsoff) return stbtt__new_buf(NULL, 0); + stbtt__buf_seek(&cff, private_loc[1]+subrsoff); + return stbtt__cff_get_index(&cff); +} + +// since most people won't use this, find this table the first time it's needed +static int stbtt__get_svg(stbtt_fontinfo *info) +{ + stbtt_uint32 t; + if (info->svg < 0) { + t = stbtt__find_table(info->data, info->fontstart, "SVG "); + if (t) { + stbtt_uint32 offset = ttULONG(info->data + t + 2); + info->svg = t + offset; + } else { + info->svg = 0; + } + } + return info->svg; +} + +static int stbtt_InitFont_internal(stbtt_fontinfo *info, unsigned char *data, int fontstart) +{ + stbtt_uint32 cmap, t; + stbtt_int32 i,numTables; + + info->data = data; + info->fontstart = fontstart; + info->cff = stbtt__new_buf(NULL, 0); + + cmap = stbtt__find_table(data, fontstart, "cmap"); // required + info->loca = stbtt__find_table(data, fontstart, "loca"); // required + info->head = stbtt__find_table(data, fontstart, "head"); // required + info->glyf = stbtt__find_table(data, fontstart, "glyf"); // required + info->hhea = stbtt__find_table(data, fontstart, "hhea"); // required + info->hmtx = stbtt__find_table(data, fontstart, "hmtx"); // required + info->kern = stbtt__find_table(data, fontstart, "kern"); // not required + info->gpos = stbtt__find_table(data, fontstart, "GPOS"); // not required + + if (!cmap || !info->head || !info->hhea || !info->hmtx) + return 0; + if (info->glyf) { + // required for truetype + if (!info->loca) return 0; + } else { + // initialization for CFF / Type2 fonts (OTF) + stbtt__buf b, topdict, topdictidx; + stbtt_uint32 cstype = 2, charstrings = 0, fdarrayoff = 0, fdselectoff = 0; + stbtt_uint32 cff; + + cff = stbtt__find_table(data, fontstart, "CFF "); + if (!cff) return 0; + + info->fontdicts = stbtt__new_buf(NULL, 0); + info->fdselect = stbtt__new_buf(NULL, 0); + + // @TODO this should use size from table (not 512MB) + info->cff = stbtt__new_buf(data+cff, 512*1024*1024); + b = info->cff; + + // read the header + stbtt__buf_skip(&b, 2); + stbtt__buf_seek(&b, stbtt__buf_get8(&b)); // hdrsize + + // @TODO the name INDEX could list multiple fonts, + // but we just use the first one. + stbtt__cff_get_index(&b); // name INDEX + topdictidx = stbtt__cff_get_index(&b); + topdict = stbtt__cff_index_get(topdictidx, 0); + stbtt__cff_get_index(&b); // string INDEX + info->gsubrs = stbtt__cff_get_index(&b); + + stbtt__dict_get_ints(&topdict, 17, 1, &charstrings); + stbtt__dict_get_ints(&topdict, 0x100 | 6, 1, &cstype); + stbtt__dict_get_ints(&topdict, 0x100 | 36, 1, &fdarrayoff); + stbtt__dict_get_ints(&topdict, 0x100 | 37, 1, &fdselectoff); + info->subrs = stbtt__get_subrs(b, topdict); + + // we only support Type 2 charstrings + if (cstype != 2) return 0; + if (charstrings == 0) return 0; + + if (fdarrayoff) { + // looks like a CID font + if (!fdselectoff) return 0; + stbtt__buf_seek(&b, fdarrayoff); + info->fontdicts = stbtt__cff_get_index(&b); + info->fdselect = stbtt__buf_range(&b, fdselectoff, b.size-fdselectoff); + } + + stbtt__buf_seek(&b, charstrings); + info->charstrings = stbtt__cff_get_index(&b); + } + + t = stbtt__find_table(data, fontstart, "maxp"); + if (t) + info->numGlyphs = ttUSHORT(data+t+4); + else + info->numGlyphs = 0xffff; + + info->svg = -1; + + // find a cmap encoding table we understand *now* to avoid searching + // later. (todo: could make this installable) + // the same regardless of glyph. + numTables = ttUSHORT(data + cmap + 2); + info->index_map = 0; + for (i=0; i < numTables; ++i) { + stbtt_uint32 encoding_record = cmap + 4 + 8 * i; + // find an encoding we understand: + switch(ttUSHORT(data+encoding_record)) { + case STBTT_PLATFORM_ID_MICROSOFT: + switch (ttUSHORT(data+encoding_record+2)) { + case STBTT_MS_EID_UNICODE_BMP: + case STBTT_MS_EID_UNICODE_FULL: + // MS/Unicode + info->index_map = cmap + ttULONG(data+encoding_record+4); + break; + } + break; + case STBTT_PLATFORM_ID_UNICODE: + // Mac/iOS has these + // all the encodingIDs are unicode, so we don't bother to check it + info->index_map = cmap + ttULONG(data+encoding_record+4); + break; + } + } + if (info->index_map == 0) + return 0; + + info->indexToLocFormat = ttUSHORT(data+info->head + 50); + return 1; +} + +STBTT_DEF int stbtt_FindGlyphIndex(const stbtt_fontinfo *info, int unicode_codepoint) +{ + stbtt_uint8 *data = info->data; + stbtt_uint32 index_map = info->index_map; + + stbtt_uint16 format = ttUSHORT(data + index_map + 0); + if (format == 0) { // apple byte encoding + stbtt_int32 bytes = ttUSHORT(data + index_map + 2); + if (unicode_codepoint < bytes-6) + return ttBYTE(data + index_map + 6 + unicode_codepoint); + return 0; + } else if (format == 6) { + stbtt_uint32 first = ttUSHORT(data + index_map + 6); + stbtt_uint32 count = ttUSHORT(data + index_map + 8); + if ((stbtt_uint32) unicode_codepoint >= first && (stbtt_uint32) unicode_codepoint < first+count) + return ttUSHORT(data + index_map + 10 + (unicode_codepoint - first)*2); + return 0; + } else if (format == 2) { + STBTT_assert(0); // @TODO: high-byte mapping for japanese/chinese/korean + return 0; + } else if (format == 4) { // standard mapping for windows fonts: binary search collection of ranges + stbtt_uint16 segcount = ttUSHORT(data+index_map+6) >> 1; + stbtt_uint16 searchRange = ttUSHORT(data+index_map+8) >> 1; + stbtt_uint16 entrySelector = ttUSHORT(data+index_map+10); + stbtt_uint16 rangeShift = ttUSHORT(data+index_map+12) >> 1; + + // do a binary search of the segments + stbtt_uint32 endCount = index_map + 14; + stbtt_uint32 search = endCount; + + if (unicode_codepoint > 0xffff) + return 0; + + // they lie from endCount .. endCount + segCount + // but searchRange is the nearest power of two, so... + if (unicode_codepoint >= ttUSHORT(data + search + rangeShift*2)) + search += rangeShift*2; + + // now decrement to bias correctly to find smallest + search -= 2; + while (entrySelector) { + stbtt_uint16 end; + searchRange >>= 1; + end = ttUSHORT(data + search + searchRange*2); + if (unicode_codepoint > end) + search += searchRange*2; + --entrySelector; + } + search += 2; + + { + stbtt_uint16 offset, start; + stbtt_uint16 item = (stbtt_uint16) ((search - endCount) >> 1); + + STBTT_assert(unicode_codepoint <= ttUSHORT(data + endCount + 2*item)); + start = ttUSHORT(data + index_map + 14 + segcount*2 + 2 + 2*item); + if (unicode_codepoint < start) + return 0; + + offset = ttUSHORT(data + index_map + 14 + segcount*6 + 2 + 2*item); + if (offset == 0) + return (stbtt_uint16) (unicode_codepoint + ttSHORT(data + index_map + 14 + segcount*4 + 2 + 2*item)); + + return ttUSHORT(data + offset + (unicode_codepoint-start)*2 + index_map + 14 + segcount*6 + 2 + 2*item); + } + } else if (format == 12 || format == 13) { + stbtt_uint32 ngroups = ttULONG(data+index_map+12); + stbtt_int32 low,high; + low = 0; high = (stbtt_int32)ngroups; + // Binary search the right group. + while (low < high) { + stbtt_int32 mid = low + ((high-low) >> 1); // rounds down, so low <= mid < high + stbtt_uint32 start_char = ttULONG(data+index_map+16+mid*12); + stbtt_uint32 end_char = ttULONG(data+index_map+16+mid*12+4); + if ((stbtt_uint32) unicode_codepoint < start_char) + high = mid; + else if ((stbtt_uint32) unicode_codepoint > end_char) + low = mid+1; + else { + stbtt_uint32 start_glyph = ttULONG(data+index_map+16+mid*12+8); + if (format == 12) + return start_glyph + unicode_codepoint-start_char; + else // format == 13 + return start_glyph; + } + } + return 0; // not found + } + // @TODO + STBTT_assert(0); + return 0; +} + +STBTT_DEF int stbtt_GetCodepointShape(const stbtt_fontinfo *info, int unicode_codepoint, stbtt_vertex **vertices) +{ + return stbtt_GetGlyphShape(info, stbtt_FindGlyphIndex(info, unicode_codepoint), vertices); +} + +static void stbtt_setvertex(stbtt_vertex *v, stbtt_uint8 type, stbtt_int32 x, stbtt_int32 y, stbtt_int32 cx, stbtt_int32 cy) +{ + v->type = type; + v->x = (stbtt_int16) x; + v->y = (stbtt_int16) y; + v->cx = (stbtt_int16) cx; + v->cy = (stbtt_int16) cy; +} + +static int stbtt__GetGlyfOffset(const stbtt_fontinfo *info, int glyph_index) +{ + int g1,g2; + + STBTT_assert(!info->cff.size); + + if (glyph_index >= info->numGlyphs) return -1; // glyph index out of range + if (info->indexToLocFormat >= 2) return -1; // unknown index->glyph map format + + if (info->indexToLocFormat == 0) { + g1 = info->glyf + ttUSHORT(info->data + info->loca + glyph_index * 2) * 2; + g2 = info->glyf + ttUSHORT(info->data + info->loca + glyph_index * 2 + 2) * 2; + } else { + g1 = info->glyf + ttULONG (info->data + info->loca + glyph_index * 4); + g2 = info->glyf + ttULONG (info->data + info->loca + glyph_index * 4 + 4); + } + + return g1==g2 ? -1 : g1; // if length is 0, return -1 +} + +static int stbtt__GetGlyphInfoT2(const stbtt_fontinfo *info, int glyph_index, int *x0, int *y0, int *x1, int *y1); + +STBTT_DEF int stbtt_GetGlyphBox(const stbtt_fontinfo *info, int glyph_index, int *x0, int *y0, int *x1, int *y1) +{ + if (info->cff.size) { + stbtt__GetGlyphInfoT2(info, glyph_index, x0, y0, x1, y1); + } else { + int g = stbtt__GetGlyfOffset(info, glyph_index); + if (g < 0) return 0; + + if (x0) *x0 = ttSHORT(info->data + g + 2); + if (y0) *y0 = ttSHORT(info->data + g + 4); + if (x1) *x1 = ttSHORT(info->data + g + 6); + if (y1) *y1 = ttSHORT(info->data + g + 8); + } + return 1; +} + +STBTT_DEF int stbtt_GetCodepointBox(const stbtt_fontinfo *info, int codepoint, int *x0, int *y0, int *x1, int *y1) +{ + return stbtt_GetGlyphBox(info, stbtt_FindGlyphIndex(info,codepoint), x0,y0,x1,y1); +} + +STBTT_DEF int stbtt_IsGlyphEmpty(const stbtt_fontinfo *info, int glyph_index) +{ + stbtt_int16 numberOfContours; + int g; + if (info->cff.size) + return stbtt__GetGlyphInfoT2(info, glyph_index, NULL, NULL, NULL, NULL) == 0; + g = stbtt__GetGlyfOffset(info, glyph_index); + if (g < 0) return 1; + numberOfContours = ttSHORT(info->data + g); + return numberOfContours == 0; +} + +static int stbtt__close_shape(stbtt_vertex *vertices, int num_vertices, int was_off, int start_off, + stbtt_int32 sx, stbtt_int32 sy, stbtt_int32 scx, stbtt_int32 scy, stbtt_int32 cx, stbtt_int32 cy) +{ + if (start_off) { + if (was_off) + stbtt_setvertex(&vertices[num_vertices++], STBTT_vcurve, (cx+scx)>>1, (cy+scy)>>1, cx,cy); + stbtt_setvertex(&vertices[num_vertices++], STBTT_vcurve, sx,sy,scx,scy); + } else { + if (was_off) + stbtt_setvertex(&vertices[num_vertices++], STBTT_vcurve,sx,sy,cx,cy); + else + stbtt_setvertex(&vertices[num_vertices++], STBTT_vline,sx,sy,0,0); + } + return num_vertices; +} + +static int stbtt__GetGlyphShapeTT(const stbtt_fontinfo *info, int glyph_index, stbtt_vertex **pvertices) +{ + stbtt_int16 numberOfContours; + stbtt_uint8 *endPtsOfContours; + stbtt_uint8 *data = info->data; + stbtt_vertex *vertices=0; + int num_vertices=0; + int g = stbtt__GetGlyfOffset(info, glyph_index); + + *pvertices = NULL; + + if (g < 0) return 0; + + numberOfContours = ttSHORT(data + g); + + if (numberOfContours > 0) { + stbtt_uint8 flags=0,flagcount; + stbtt_int32 ins, i,j=0,m,n, next_move, was_off=0, off, start_off=0; + stbtt_int32 x,y,cx,cy,sx,sy, scx,scy; + stbtt_uint8 *points; + endPtsOfContours = (data + g + 10); + ins = ttUSHORT(data + g + 10 + numberOfContours * 2); + points = data + g + 10 + numberOfContours * 2 + 2 + ins; + + n = 1+ttUSHORT(endPtsOfContours + numberOfContours*2-2); + + m = n + 2*numberOfContours; // a loose bound on how many vertices we might need + vertices = (stbtt_vertex *) STBTT_malloc(m * sizeof(vertices[0]), info->userdata); + if (vertices == 0) + return 0; + + next_move = 0; + flagcount=0; + + // in first pass, we load uninterpreted data into the allocated array + // above, shifted to the end of the array so we won't overwrite it when + // we create our final data starting from the front + + off = m - n; // starting offset for uninterpreted data, regardless of how m ends up being calculated + + // first load flags + + for (i=0; i < n; ++i) { + if (flagcount == 0) { + flags = *points++; + if (flags & 8) + flagcount = *points++; + } else + --flagcount; + vertices[off+i].type = flags; + } + + // now load x coordinates + x=0; + for (i=0; i < n; ++i) { + flags = vertices[off+i].type; + if (flags & 2) { + stbtt_int16 dx = *points++; + x += (flags & 16) ? dx : -dx; // ??? + } else { + if (!(flags & 16)) { + x = x + (stbtt_int16) (points[0]*256 + points[1]); + points += 2; + } + } + vertices[off+i].x = (stbtt_int16) x; + } + + // now load y coordinates + y=0; + for (i=0; i < n; ++i) { + flags = vertices[off+i].type; + if (flags & 4) { + stbtt_int16 dy = *points++; + y += (flags & 32) ? dy : -dy; // ??? + } else { + if (!(flags & 32)) { + y = y + (stbtt_int16) (points[0]*256 + points[1]); + points += 2; + } + } + vertices[off+i].y = (stbtt_int16) y; + } + + // now convert them to our format + num_vertices=0; + sx = sy = cx = cy = scx = scy = 0; + for (i=0; i < n; ++i) { + flags = vertices[off+i].type; + x = (stbtt_int16) vertices[off+i].x; + y = (stbtt_int16) vertices[off+i].y; + + if (next_move == i) { + if (i != 0) + num_vertices = stbtt__close_shape(vertices, num_vertices, was_off, start_off, sx,sy,scx,scy,cx,cy); + + // now start the new one + start_off = !(flags & 1); + if (start_off) { + // if we start off with an off-curve point, then when we need to find a point on the curve + // where we can start, and we need to save some state for when we wraparound. + scx = x; + scy = y; + if (!(vertices[off+i+1].type & 1)) { + // next point is also a curve point, so interpolate an on-point curve + sx = (x + (stbtt_int32) vertices[off+i+1].x) >> 1; + sy = (y + (stbtt_int32) vertices[off+i+1].y) >> 1; + } else { + // otherwise just use the next point as our start point + sx = (stbtt_int32) vertices[off+i+1].x; + sy = (stbtt_int32) vertices[off+i+1].y; + ++i; // we're using point i+1 as the starting point, so skip it + } + } else { + sx = x; + sy = y; + } + stbtt_setvertex(&vertices[num_vertices++], STBTT_vmove,sx,sy,0,0); + was_off = 0; + next_move = 1 + ttUSHORT(endPtsOfContours+j*2); + ++j; + } else { + if (!(flags & 1)) { // if it's a curve + if (was_off) // two off-curve control points in a row means interpolate an on-curve midpoint + stbtt_setvertex(&vertices[num_vertices++], STBTT_vcurve, (cx+x)>>1, (cy+y)>>1, cx, cy); + cx = x; + cy = y; + was_off = 1; + } else { + if (was_off) + stbtt_setvertex(&vertices[num_vertices++], STBTT_vcurve, x,y, cx, cy); + else + stbtt_setvertex(&vertices[num_vertices++], STBTT_vline, x,y,0,0); + was_off = 0; + } + } + } + num_vertices = stbtt__close_shape(vertices, num_vertices, was_off, start_off, sx,sy,scx,scy,cx,cy); + } else if (numberOfContours < 0) { + // Compound shapes. + int more = 1; + stbtt_uint8 *comp = data + g + 10; + num_vertices = 0; + vertices = 0; + while (more) { + stbtt_uint16 flags, gidx; + int comp_num_verts = 0, i; + stbtt_vertex *comp_verts = 0, *tmp = 0; + float mtx[6] = {1,0,0,1,0,0}, m, n; + + flags = ttSHORT(comp); comp+=2; + gidx = ttSHORT(comp); comp+=2; + + if (flags & 2) { // XY values + if (flags & 1) { // shorts + mtx[4] = ttSHORT(comp); comp+=2; + mtx[5] = ttSHORT(comp); comp+=2; + } else { + mtx[4] = ttCHAR(comp); comp+=1; + mtx[5] = ttCHAR(comp); comp+=1; + } + } + else { + // @TODO handle matching point + STBTT_assert(0); + } + if (flags & (1<<3)) { // WE_HAVE_A_SCALE + mtx[0] = mtx[3] = ttSHORT(comp)/16384.0f; comp+=2; + mtx[1] = mtx[2] = 0; + } else if (flags & (1<<6)) { // WE_HAVE_AN_X_AND_YSCALE + mtx[0] = ttSHORT(comp)/16384.0f; comp+=2; + mtx[1] = mtx[2] = 0; + mtx[3] = ttSHORT(comp)/16384.0f; comp+=2; + } else if (flags & (1<<7)) { // WE_HAVE_A_TWO_BY_TWO + mtx[0] = ttSHORT(comp)/16384.0f; comp+=2; + mtx[1] = ttSHORT(comp)/16384.0f; comp+=2; + mtx[2] = ttSHORT(comp)/16384.0f; comp+=2; + mtx[3] = ttSHORT(comp)/16384.0f; comp+=2; + } + + // Find transformation scales. + m = (float) STBTT_sqrt(mtx[0]*mtx[0] + mtx[1]*mtx[1]); + n = (float) STBTT_sqrt(mtx[2]*mtx[2] + mtx[3]*mtx[3]); + + // Get indexed glyph. + comp_num_verts = stbtt_GetGlyphShape(info, gidx, &comp_verts); + if (comp_num_verts > 0) { + // Transform vertices. + for (i = 0; i < comp_num_verts; ++i) { + stbtt_vertex* v = &comp_verts[i]; + stbtt_vertex_type x,y; + x=v->x; y=v->y; + v->x = (stbtt_vertex_type)(m * (mtx[0]*x + mtx[2]*y + mtx[4])); + v->y = (stbtt_vertex_type)(n * (mtx[1]*x + mtx[3]*y + mtx[5])); + x=v->cx; y=v->cy; + v->cx = (stbtt_vertex_type)(m * (mtx[0]*x + mtx[2]*y + mtx[4])); + v->cy = (stbtt_vertex_type)(n * (mtx[1]*x + mtx[3]*y + mtx[5])); + } + // Append vertices. + tmp = (stbtt_vertex*)STBTT_malloc((num_vertices+comp_num_verts)*sizeof(stbtt_vertex), info->userdata); + if (!tmp) { + if (vertices) STBTT_free(vertices, info->userdata); + if (comp_verts) STBTT_free(comp_verts, info->userdata); + return 0; + } + if (num_vertices > 0) STBTT_memcpy(tmp, vertices, num_vertices*sizeof(stbtt_vertex)); + STBTT_memcpy(tmp+num_vertices, comp_verts, comp_num_verts*sizeof(stbtt_vertex)); + if (vertices) STBTT_free(vertices, info->userdata); + vertices = tmp; + STBTT_free(comp_verts, info->userdata); + num_vertices += comp_num_verts; + } + // More components ? + more = flags & (1<<5); + } + } else { + // numberOfCounters == 0, do nothing + } + + *pvertices = vertices; + return num_vertices; +} + +typedef struct +{ + int bounds; + int started; + float first_x, first_y; + float x, y; + stbtt_int32 min_x, max_x, min_y, max_y; + + stbtt_vertex *pvertices; + int num_vertices; +} stbtt__csctx; + +#define STBTT__CSCTX_INIT(bounds) {bounds,0, 0,0, 0,0, 0,0,0,0, NULL, 0} + +static void stbtt__track_vertex(stbtt__csctx *c, stbtt_int32 x, stbtt_int32 y) +{ + if (x > c->max_x || !c->started) c->max_x = x; + if (y > c->max_y || !c->started) c->max_y = y; + if (x < c->min_x || !c->started) c->min_x = x; + if (y < c->min_y || !c->started) c->min_y = y; + c->started = 1; +} + +static void stbtt__csctx_v(stbtt__csctx *c, stbtt_uint8 type, stbtt_int32 x, stbtt_int32 y, stbtt_int32 cx, stbtt_int32 cy, stbtt_int32 cx1, stbtt_int32 cy1) +{ + if (c->bounds) { + stbtt__track_vertex(c, x, y); + if (type == STBTT_vcubic) { + stbtt__track_vertex(c, cx, cy); + stbtt__track_vertex(c, cx1, cy1); + } + } else { + stbtt_setvertex(&c->pvertices[c->num_vertices], type, x, y, cx, cy); + c->pvertices[c->num_vertices].cx1 = (stbtt_int16) cx1; + c->pvertices[c->num_vertices].cy1 = (stbtt_int16) cy1; + } + c->num_vertices++; +} + +static void stbtt__csctx_close_shape(stbtt__csctx *ctx) +{ + if (ctx->first_x != ctx->x || ctx->first_y != ctx->y) + stbtt__csctx_v(ctx, STBTT_vline, (int)ctx->first_x, (int)ctx->first_y, 0, 0, 0, 0); +} + +static void stbtt__csctx_rmove_to(stbtt__csctx *ctx, float dx, float dy) +{ + stbtt__csctx_close_shape(ctx); + ctx->first_x = ctx->x = ctx->x + dx; + ctx->first_y = ctx->y = ctx->y + dy; + stbtt__csctx_v(ctx, STBTT_vmove, (int)ctx->x, (int)ctx->y, 0, 0, 0, 0); +} + +static void stbtt__csctx_rline_to(stbtt__csctx *ctx, float dx, float dy) +{ + ctx->x += dx; + ctx->y += dy; + stbtt__csctx_v(ctx, STBTT_vline, (int)ctx->x, (int)ctx->y, 0, 0, 0, 0); +} + +static void stbtt__csctx_rccurve_to(stbtt__csctx *ctx, float dx1, float dy1, float dx2, float dy2, float dx3, float dy3) +{ + float cx1 = ctx->x + dx1; + float cy1 = ctx->y + dy1; + float cx2 = cx1 + dx2; + float cy2 = cy1 + dy2; + ctx->x = cx2 + dx3; + ctx->y = cy2 + dy3; + stbtt__csctx_v(ctx, STBTT_vcubic, (int)ctx->x, (int)ctx->y, (int)cx1, (int)cy1, (int)cx2, (int)cy2); +} + +static stbtt__buf stbtt__get_subr(stbtt__buf idx, int n) +{ + int count = stbtt__cff_index_count(&idx); + int bias = 107; + if (count >= 33900) + bias = 32768; + else if (count >= 1240) + bias = 1131; + n += bias; + if (n < 0 || n >= count) + return stbtt__new_buf(NULL, 0); + return stbtt__cff_index_get(idx, n); +} + +static stbtt__buf stbtt__cid_get_glyph_subrs(const stbtt_fontinfo *info, int glyph_index) +{ + stbtt__buf fdselect = info->fdselect; + int nranges, start, end, v, fmt, fdselector = -1, i; + + stbtt__buf_seek(&fdselect, 0); + fmt = stbtt__buf_get8(&fdselect); + if (fmt == 0) { + // untested + stbtt__buf_skip(&fdselect, glyph_index); + fdselector = stbtt__buf_get8(&fdselect); + } else if (fmt == 3) { + nranges = stbtt__buf_get16(&fdselect); + start = stbtt__buf_get16(&fdselect); + for (i = 0; i < nranges; i++) { + v = stbtt__buf_get8(&fdselect); + end = stbtt__buf_get16(&fdselect); + if (glyph_index >= start && glyph_index < end) { + fdselector = v; + break; + } + start = end; + } + } + if (fdselector == -1) stbtt__new_buf(NULL, 0); + return stbtt__get_subrs(info->cff, stbtt__cff_index_get(info->fontdicts, fdselector)); +} + +static int stbtt__run_charstring(const stbtt_fontinfo *info, int glyph_index, stbtt__csctx *c) +{ + int in_header = 1, maskbits = 0, subr_stack_height = 0, sp = 0, v, i, b0; + int has_subrs = 0, clear_stack; + float s[48]; + stbtt__buf subr_stack[10], subrs = info->subrs, b; + float f; + +#define STBTT__CSERR(s) (0) + + // this currently ignores the initial width value, which isn't needed if we have hmtx + b = stbtt__cff_index_get(info->charstrings, glyph_index); + while (b.cursor < b.size) { + i = 0; + clear_stack = 1; + b0 = stbtt__buf_get8(&b); + switch (b0) { + // @TODO implement hinting + case 0x13: // hintmask + case 0x14: // cntrmask + if (in_header) + maskbits += (sp / 2); // implicit "vstem" + in_header = 0; + stbtt__buf_skip(&b, (maskbits + 7) / 8); + break; + + case 0x01: // hstem + case 0x03: // vstem + case 0x12: // hstemhm + case 0x17: // vstemhm + maskbits += (sp / 2); + break; + + case 0x15: // rmoveto + in_header = 0; + if (sp < 2) return STBTT__CSERR("rmoveto stack"); + stbtt__csctx_rmove_to(c, s[sp-2], s[sp-1]); + break; + case 0x04: // vmoveto + in_header = 0; + if (sp < 1) return STBTT__CSERR("vmoveto stack"); + stbtt__csctx_rmove_to(c, 0, s[sp-1]); + break; + case 0x16: // hmoveto + in_header = 0; + if (sp < 1) return STBTT__CSERR("hmoveto stack"); + stbtt__csctx_rmove_to(c, s[sp-1], 0); + break; + + case 0x05: // rlineto + if (sp < 2) return STBTT__CSERR("rlineto stack"); + for (; i + 1 < sp; i += 2) + stbtt__csctx_rline_to(c, s[i], s[i+1]); + break; + + // hlineto/vlineto and vhcurveto/hvcurveto alternate horizontal and vertical + // starting from a different place. + + case 0x07: // vlineto + if (sp < 1) return STBTT__CSERR("vlineto stack"); + goto vlineto; + case 0x06: // hlineto + if (sp < 1) return STBTT__CSERR("hlineto stack"); + for (;;) { + if (i >= sp) break; + stbtt__csctx_rline_to(c, s[i], 0); + i++; + vlineto: + if (i >= sp) break; + stbtt__csctx_rline_to(c, 0, s[i]); + i++; + } + break; + + case 0x1F: // hvcurveto + if (sp < 4) return STBTT__CSERR("hvcurveto stack"); + goto hvcurveto; + case 0x1E: // vhcurveto + if (sp < 4) return STBTT__CSERR("vhcurveto stack"); + for (;;) { + if (i + 3 >= sp) break; + stbtt__csctx_rccurve_to(c, 0, s[i], s[i+1], s[i+2], s[i+3], (sp - i == 5) ? s[i + 4] : 0.0f); + i += 4; + hvcurveto: + if (i + 3 >= sp) break; + stbtt__csctx_rccurve_to(c, s[i], 0, s[i+1], s[i+2], (sp - i == 5) ? s[i+4] : 0.0f, s[i+3]); + i += 4; + } + break; + + case 0x08: // rrcurveto + if (sp < 6) return STBTT__CSERR("rcurveline stack"); + for (; i + 5 < sp; i += 6) + stbtt__csctx_rccurve_to(c, s[i], s[i+1], s[i+2], s[i+3], s[i+4], s[i+5]); + break; + + case 0x18: // rcurveline + if (sp < 8) return STBTT__CSERR("rcurveline stack"); + for (; i + 5 < sp - 2; i += 6) + stbtt__csctx_rccurve_to(c, s[i], s[i+1], s[i+2], s[i+3], s[i+4], s[i+5]); + if (i + 1 >= sp) return STBTT__CSERR("rcurveline stack"); + stbtt__csctx_rline_to(c, s[i], s[i+1]); + break; + + case 0x19: // rlinecurve + if (sp < 8) return STBTT__CSERR("rlinecurve stack"); + for (; i + 1 < sp - 6; i += 2) + stbtt__csctx_rline_to(c, s[i], s[i+1]); + if (i + 5 >= sp) return STBTT__CSERR("rlinecurve stack"); + stbtt__csctx_rccurve_to(c, s[i], s[i+1], s[i+2], s[i+3], s[i+4], s[i+5]); + break; + + case 0x1A: // vvcurveto + case 0x1B: // hhcurveto + if (sp < 4) return STBTT__CSERR("(vv|hh)curveto stack"); + f = 0.0; + if (sp & 1) { f = s[i]; i++; } + for (; i + 3 < sp; i += 4) { + if (b0 == 0x1B) + stbtt__csctx_rccurve_to(c, s[i], f, s[i+1], s[i+2], s[i+3], 0.0); + else + stbtt__csctx_rccurve_to(c, f, s[i], s[i+1], s[i+2], 0.0, s[i+3]); + f = 0.0; + } + break; + + case 0x0A: // callsubr + if (!has_subrs) { + if (info->fdselect.size) + subrs = stbtt__cid_get_glyph_subrs(info, glyph_index); + has_subrs = 1; + } + // fallthrough + case 0x1D: // callgsubr + if (sp < 1) return STBTT__CSERR("call(g|)subr stack"); + v = (int) s[--sp]; + if (subr_stack_height >= 10) return STBTT__CSERR("recursion limit"); + subr_stack[subr_stack_height++] = b; + b = stbtt__get_subr(b0 == 0x0A ? subrs : info->gsubrs, v); + if (b.size == 0) return STBTT__CSERR("subr not found"); + b.cursor = 0; + clear_stack = 0; + break; + + case 0x0B: // return + if (subr_stack_height <= 0) return STBTT__CSERR("return outside subr"); + b = subr_stack[--subr_stack_height]; + clear_stack = 0; + break; + + case 0x0E: // endchar + stbtt__csctx_close_shape(c); + return 1; + + case 0x0C: { // two-byte escape + float dx1, dx2, dx3, dx4, dx5, dx6, dy1, dy2, dy3, dy4, dy5, dy6; + float dx, dy; + int b1 = stbtt__buf_get8(&b); + switch (b1) { + // @TODO These "flex" implementations ignore the flex-depth and resolution, + // and always draw beziers. + case 0x22: // hflex + if (sp < 7) return STBTT__CSERR("hflex stack"); + dx1 = s[0]; + dx2 = s[1]; + dy2 = s[2]; + dx3 = s[3]; + dx4 = s[4]; + dx5 = s[5]; + dx6 = s[6]; + stbtt__csctx_rccurve_to(c, dx1, 0, dx2, dy2, dx3, 0); + stbtt__csctx_rccurve_to(c, dx4, 0, dx5, -dy2, dx6, 0); + break; + + case 0x23: // flex + if (sp < 13) return STBTT__CSERR("flex stack"); + dx1 = s[0]; + dy1 = s[1]; + dx2 = s[2]; + dy2 = s[3]; + dx3 = s[4]; + dy3 = s[5]; + dx4 = s[6]; + dy4 = s[7]; + dx5 = s[8]; + dy5 = s[9]; + dx6 = s[10]; + dy6 = s[11]; + //fd is s[12] + stbtt__csctx_rccurve_to(c, dx1, dy1, dx2, dy2, dx3, dy3); + stbtt__csctx_rccurve_to(c, dx4, dy4, dx5, dy5, dx6, dy6); + break; + + case 0x24: // hflex1 + if (sp < 9) return STBTT__CSERR("hflex1 stack"); + dx1 = s[0]; + dy1 = s[1]; + dx2 = s[2]; + dy2 = s[3]; + dx3 = s[4]; + dx4 = s[5]; + dx5 = s[6]; + dy5 = s[7]; + dx6 = s[8]; + stbtt__csctx_rccurve_to(c, dx1, dy1, dx2, dy2, dx3, 0); + stbtt__csctx_rccurve_to(c, dx4, 0, dx5, dy5, dx6, -(dy1+dy2+dy5)); + break; + + case 0x25: // flex1 + if (sp < 11) return STBTT__CSERR("flex1 stack"); + dx1 = s[0]; + dy1 = s[1]; + dx2 = s[2]; + dy2 = s[3]; + dx3 = s[4]; + dy3 = s[5]; + dx4 = s[6]; + dy4 = s[7]; + dx5 = s[8]; + dy5 = s[9]; + dx6 = dy6 = s[10]; + dx = dx1+dx2+dx3+dx4+dx5; + dy = dy1+dy2+dy3+dy4+dy5; + if (STBTT_fabs(dx) > STBTT_fabs(dy)) + dy6 = -dy; + else + dx6 = -dx; + stbtt__csctx_rccurve_to(c, dx1, dy1, dx2, dy2, dx3, dy3); + stbtt__csctx_rccurve_to(c, dx4, dy4, dx5, dy5, dx6, dy6); + break; + + default: + return STBTT__CSERR("unimplemented"); + } + } break; + + default: + if (b0 != 255 && b0 != 28 && (b0 < 32 || b0 > 254)) + return STBTT__CSERR("reserved operator"); + + // push immediate + if (b0 == 255) { + f = (float)(stbtt_int32)stbtt__buf_get32(&b) / 0x10000; + } else { + stbtt__buf_skip(&b, -1); + f = (float)(stbtt_int16)stbtt__cff_int(&b); + } + if (sp >= 48) return STBTT__CSERR("push stack overflow"); + s[sp++] = f; + clear_stack = 0; + break; + } + if (clear_stack) sp = 0; + } + return STBTT__CSERR("no endchar"); + +#undef STBTT__CSERR +} + +static int stbtt__GetGlyphShapeT2(const stbtt_fontinfo *info, int glyph_index, stbtt_vertex **pvertices) +{ + // runs the charstring twice, once to count and once to output (to avoid realloc) + stbtt__csctx count_ctx = STBTT__CSCTX_INIT(1); + stbtt__csctx output_ctx = STBTT__CSCTX_INIT(0); + if (stbtt__run_charstring(info, glyph_index, &count_ctx)) { + *pvertices = (stbtt_vertex*)STBTT_malloc(count_ctx.num_vertices*sizeof(stbtt_vertex), info->userdata); + output_ctx.pvertices = *pvertices; + if (stbtt__run_charstring(info, glyph_index, &output_ctx)) { + STBTT_assert(output_ctx.num_vertices == count_ctx.num_vertices); + return output_ctx.num_vertices; + } + } + *pvertices = NULL; + return 0; +} + +static int stbtt__GetGlyphInfoT2(const stbtt_fontinfo *info, int glyph_index, int *x0, int *y0, int *x1, int *y1) +{ + stbtt__csctx c = STBTT__CSCTX_INIT(1); + int r = stbtt__run_charstring(info, glyph_index, &c); + if (x0) *x0 = r ? c.min_x : 0; + if (y0) *y0 = r ? c.min_y : 0; + if (x1) *x1 = r ? c.max_x : 0; + if (y1) *y1 = r ? c.max_y : 0; + return r ? c.num_vertices : 0; +} + +STBTT_DEF int stbtt_GetGlyphShape(const stbtt_fontinfo *info, int glyph_index, stbtt_vertex **pvertices) +{ + if (!info->cff.size) + return stbtt__GetGlyphShapeTT(info, glyph_index, pvertices); + else + return stbtt__GetGlyphShapeT2(info, glyph_index, pvertices); +} + +STBTT_DEF void stbtt_GetGlyphHMetrics(const stbtt_fontinfo *info, int glyph_index, int *advanceWidth, int *leftSideBearing) +{ + stbtt_uint16 numOfLongHorMetrics = ttUSHORT(info->data+info->hhea + 34); + if (glyph_index < numOfLongHorMetrics) { + if (advanceWidth) *advanceWidth = ttSHORT(info->data + info->hmtx + 4*glyph_index); + if (leftSideBearing) *leftSideBearing = ttSHORT(info->data + info->hmtx + 4*glyph_index + 2); + } else { + if (advanceWidth) *advanceWidth = ttSHORT(info->data + info->hmtx + 4*(numOfLongHorMetrics-1)); + if (leftSideBearing) *leftSideBearing = ttSHORT(info->data + info->hmtx + 4*numOfLongHorMetrics + 2*(glyph_index - numOfLongHorMetrics)); + } +} + +STBTT_DEF int stbtt_GetKerningTableLength(const stbtt_fontinfo *info) +{ + stbtt_uint8 *data = info->data + info->kern; + + // we only look at the first table. it must be 'horizontal' and format 0. + if (!info->kern) + return 0; + if (ttUSHORT(data+2) < 1) // number of tables, need at least 1 + return 0; + if (ttUSHORT(data+8) != 1) // horizontal flag must be set in format + return 0; + + return ttUSHORT(data+10); +} + +STBTT_DEF int stbtt_GetKerningTable(const stbtt_fontinfo *info, stbtt_kerningentry* table, int table_length) +{ + stbtt_uint8 *data = info->data + info->kern; + int k, length; + + // we only look at the first table. it must be 'horizontal' and format 0. + if (!info->kern) + return 0; + if (ttUSHORT(data+2) < 1) // number of tables, need at least 1 + return 0; + if (ttUSHORT(data+8) != 1) // horizontal flag must be set in format + return 0; + + length = ttUSHORT(data+10); + if (table_length < length) + length = table_length; + + for (k = 0; k < length; k++) + { + table[k].glyph1 = ttUSHORT(data+18+(k*6)); + table[k].glyph2 = ttUSHORT(data+20+(k*6)); + table[k].advance = ttSHORT(data+22+(k*6)); + } + + return length; +} + +static int stbtt__GetGlyphKernInfoAdvance(const stbtt_fontinfo *info, int glyph1, int glyph2) +{ + stbtt_uint8 *data = info->data + info->kern; + stbtt_uint32 needle, straw; + int l, r, m; + + // we only look at the first table. it must be 'horizontal' and format 0. + if (!info->kern) + return 0; + if (ttUSHORT(data+2) < 1) // number of tables, need at least 1 + return 0; + if (ttUSHORT(data+8) != 1) // horizontal flag must be set in format + return 0; + + l = 0; + r = ttUSHORT(data+10) - 1; + needle = glyph1 << 16 | glyph2; + while (l <= r) { + m = (l + r) >> 1; + straw = ttULONG(data+18+(m*6)); // note: unaligned read + if (needle < straw) + r = m - 1; + else if (needle > straw) + l = m + 1; + else + return ttSHORT(data+22+(m*6)); + } + return 0; +} + +static stbtt_int32 stbtt__GetCoverageIndex(stbtt_uint8 *coverageTable, int glyph) +{ + stbtt_uint16 coverageFormat = ttUSHORT(coverageTable); + switch(coverageFormat) { + case 1: { + stbtt_uint16 glyphCount = ttUSHORT(coverageTable + 2); + + // Binary search. + stbtt_int32 l=0, r=glyphCount-1, m; + int straw, needle=glyph; + while (l <= r) { + stbtt_uint8 *glyphArray = coverageTable + 4; + stbtt_uint16 glyphID; + m = (l + r) >> 1; + glyphID = ttUSHORT(glyphArray + 2 * m); + straw = glyphID; + if (needle < straw) + r = m - 1; + else if (needle > straw) + l = m + 1; + else { + return m; + } + } + } break; + + case 2: { + stbtt_uint16 rangeCount = ttUSHORT(coverageTable + 2); + stbtt_uint8 *rangeArray = coverageTable + 4; + + // Binary search. + stbtt_int32 l=0, r=rangeCount-1, m; + int strawStart, strawEnd, needle=glyph; + while (l <= r) { + stbtt_uint8 *rangeRecord; + m = (l + r) >> 1; + rangeRecord = rangeArray + 6 * m; + strawStart = ttUSHORT(rangeRecord); + strawEnd = ttUSHORT(rangeRecord + 2); + if (needle < strawStart) + r = m - 1; + else if (needle > strawEnd) + l = m + 1; + else { + stbtt_uint16 startCoverageIndex = ttUSHORT(rangeRecord + 4); + return startCoverageIndex + glyph - strawStart; + } + } + } break; + + default: { + // There are no other cases. + STBTT_assert(0); + } break; + } + + return -1; +} + +static stbtt_int32 stbtt__GetGlyphClass(stbtt_uint8 *classDefTable, int glyph) +{ + stbtt_uint16 classDefFormat = ttUSHORT(classDefTable); + switch(classDefFormat) + { + case 1: { + stbtt_uint16 startGlyphID = ttUSHORT(classDefTable + 2); + stbtt_uint16 glyphCount = ttUSHORT(classDefTable + 4); + stbtt_uint8 *classDef1ValueArray = classDefTable + 6; + + if (glyph >= startGlyphID && glyph < startGlyphID + glyphCount) + return (stbtt_int32)ttUSHORT(classDef1ValueArray + 2 * (glyph - startGlyphID)); + + classDefTable = classDef1ValueArray + 2 * glyphCount; + } break; + + case 2: { + stbtt_uint16 classRangeCount = ttUSHORT(classDefTable + 2); + stbtt_uint8 *classRangeRecords = classDefTable + 4; + + // Binary search. + stbtt_int32 l=0, r=classRangeCount-1, m; + int strawStart, strawEnd, needle=glyph; + while (l <= r) { + stbtt_uint8 *classRangeRecord; + m = (l + r) >> 1; + classRangeRecord = classRangeRecords + 6 * m; + strawStart = ttUSHORT(classRangeRecord); + strawEnd = ttUSHORT(classRangeRecord + 2); + if (needle < strawStart) + r = m - 1; + else if (needle > strawEnd) + l = m + 1; + else + return (stbtt_int32)ttUSHORT(classRangeRecord + 4); + } + + classDefTable = classRangeRecords + 6 * classRangeCount; + } break; + + default: { + // There are no other cases. + STBTT_assert(0); + } break; + } + + return -1; +} + +// Define to STBTT_assert(x) if you want to break on unimplemented formats. +#define STBTT_GPOS_TODO_assert(x) + +static stbtt_int32 stbtt__GetGlyphGPOSInfoAdvance(const stbtt_fontinfo *info, int glyph1, int glyph2) +{ + stbtt_uint16 lookupListOffset; + stbtt_uint8 *lookupList; + stbtt_uint16 lookupCount; + stbtt_uint8 *data; + stbtt_int32 i; + + if (!info->gpos) return 0; + + data = info->data + info->gpos; + + if (ttUSHORT(data+0) != 1) return 0; // Major version 1 + if (ttUSHORT(data+2) != 0) return 0; // Minor version 0 + + lookupListOffset = ttUSHORT(data+8); + lookupList = data + lookupListOffset; + lookupCount = ttUSHORT(lookupList); + + for (i=0; i> 1; + pairValue = pairValueArray + (2 + valueRecordPairSizeInBytes) * m; + secondGlyph = ttUSHORT(pairValue); + straw = secondGlyph; + if (needle < straw) + r = m - 1; + else if (needle > straw) + l = m + 1; + else { + stbtt_int16 xAdvance = ttSHORT(pairValue + 2); + return xAdvance; + } + } + } break; + + case 2: { + stbtt_uint16 valueFormat1 = ttUSHORT(table + 4); + stbtt_uint16 valueFormat2 = ttUSHORT(table + 6); + + stbtt_uint16 classDef1Offset = ttUSHORT(table + 8); + stbtt_uint16 classDef2Offset = ttUSHORT(table + 10); + int glyph1class = stbtt__GetGlyphClass(table + classDef1Offset, glyph1); + int glyph2class = stbtt__GetGlyphClass(table + classDef2Offset, glyph2); + + stbtt_uint16 class1Count = ttUSHORT(table + 12); + stbtt_uint16 class2Count = ttUSHORT(table + 14); + STBTT_assert(glyph1class < class1Count); + STBTT_assert(glyph2class < class2Count); + + // TODO: Support more formats. + STBTT_GPOS_TODO_assert(valueFormat1 == 4); + if (valueFormat1 != 4) return 0; + STBTT_GPOS_TODO_assert(valueFormat2 == 0); + if (valueFormat2 != 0) return 0; + + if (glyph1class >= 0 && glyph1class < class1Count && glyph2class >= 0 && glyph2class < class2Count) { + stbtt_uint8 *class1Records = table + 16; + stbtt_uint8 *class2Records = class1Records + 2 * (glyph1class * class2Count); + stbtt_int16 xAdvance = ttSHORT(class2Records + 2 * glyph2class); + return xAdvance; + } + } break; + + default: { + // There are no other cases. + STBTT_assert(0); + break; + }; + } + } + break; + }; + + default: + // TODO: Implement other stuff. + break; + } + } + + return 0; +} + +STBTT_DEF int stbtt_GetGlyphKernAdvance(const stbtt_fontinfo *info, int g1, int g2) +{ + int xAdvance = 0; + + if (info->gpos) + xAdvance += stbtt__GetGlyphGPOSInfoAdvance(info, g1, g2); + else if (info->kern) + xAdvance += stbtt__GetGlyphKernInfoAdvance(info, g1, g2); + + return xAdvance; +} + +STBTT_DEF int stbtt_GetCodepointKernAdvance(const stbtt_fontinfo *info, int ch1, int ch2) +{ + if (!info->kern && !info->gpos) // if no kerning table, don't waste time looking up both codepoint->glyphs + return 0; + return stbtt_GetGlyphKernAdvance(info, stbtt_FindGlyphIndex(info,ch1), stbtt_FindGlyphIndex(info,ch2)); +} + +STBTT_DEF void stbtt_GetCodepointHMetrics(const stbtt_fontinfo *info, int codepoint, int *advanceWidth, int *leftSideBearing) +{ + stbtt_GetGlyphHMetrics(info, stbtt_FindGlyphIndex(info,codepoint), advanceWidth, leftSideBearing); +} + +STBTT_DEF void stbtt_GetFontVMetrics(const stbtt_fontinfo *info, int *ascent, int *descent, int *lineGap) +{ + if (ascent ) *ascent = ttSHORT(info->data+info->hhea + 4); + if (descent) *descent = ttSHORT(info->data+info->hhea + 6); + if (lineGap) *lineGap = ttSHORT(info->data+info->hhea + 8); +} + +STBTT_DEF int stbtt_GetFontVMetricsOS2(const stbtt_fontinfo *info, int *typoAscent, int *typoDescent, int *typoLineGap) +{ + int tab = stbtt__find_table(info->data, info->fontstart, "OS/2"); + if (!tab) + return 0; + if (typoAscent ) *typoAscent = ttSHORT(info->data+tab + 68); + if (typoDescent) *typoDescent = ttSHORT(info->data+tab + 70); + if (typoLineGap) *typoLineGap = ttSHORT(info->data+tab + 72); + return 1; +} + +STBTT_DEF void stbtt_GetFontBoundingBox(const stbtt_fontinfo *info, int *x0, int *y0, int *x1, int *y1) +{ + *x0 = ttSHORT(info->data + info->head + 36); + *y0 = ttSHORT(info->data + info->head + 38); + *x1 = ttSHORT(info->data + info->head + 40); + *y1 = ttSHORT(info->data + info->head + 42); +} + +STBTT_DEF float stbtt_ScaleForPixelHeight(const stbtt_fontinfo *info, float height) +{ + int fheight = ttSHORT(info->data + info->hhea + 4) - ttSHORT(info->data + info->hhea + 6); + return (float) height / fheight; +} + +STBTT_DEF float stbtt_ScaleForMappingEmToPixels(const stbtt_fontinfo *info, float pixels) +{ + int unitsPerEm = ttUSHORT(info->data + info->head + 18); + return pixels / unitsPerEm; +} + +STBTT_DEF void stbtt_FreeShape(const stbtt_fontinfo *info, stbtt_vertex *v) +{ + STBTT_free(v, info->userdata); +} + +STBTT_DEF stbtt_uint8 *stbtt_FindSVGDoc(const stbtt_fontinfo *info, int gl) +{ + int i; + stbtt_uint8 *data = info->data; + stbtt_uint8 *svg_doc_list = data + stbtt__get_svg((stbtt_fontinfo *) info); + + int numEntries = ttUSHORT(svg_doc_list); + stbtt_uint8 *svg_docs = svg_doc_list + 2; + + for(i=0; i= ttUSHORT(svg_doc)) && (gl <= ttUSHORT(svg_doc + 2))) + return svg_doc; + } + return 0; +} + +STBTT_DEF int stbtt_GetGlyphSVG(const stbtt_fontinfo *info, int gl, const char **svg) +{ + stbtt_uint8 *data = info->data; + stbtt_uint8 *svg_doc; + + if (info->svg == 0) + return 0; + + svg_doc = stbtt_FindSVGDoc(info, gl); + if (svg_doc != NULL) { + *svg = (char *) data + info->svg + ttULONG(svg_doc + 4); + return ttULONG(svg_doc + 8); + } else { + return 0; + } +} + +STBTT_DEF int stbtt_GetCodepointSVG(const stbtt_fontinfo *info, int unicode_codepoint, const char **svg) +{ + return stbtt_GetGlyphSVG(info, stbtt_FindGlyphIndex(info, unicode_codepoint), svg); +} + +////////////////////////////////////////////////////////////////////////////// +// +// antialiasing software rasterizer +// + +STBTT_DEF void stbtt_GetGlyphBitmapBoxSubpixel(const stbtt_fontinfo *font, int glyph, float scale_x, float scale_y,float shift_x, float shift_y, int *ix0, int *iy0, int *ix1, int *iy1) +{ + int x0=0,y0=0,x1,y1; // =0 suppresses compiler warning + if (!stbtt_GetGlyphBox(font, glyph, &x0,&y0,&x1,&y1)) { + // e.g. space character + if (ix0) *ix0 = 0; + if (iy0) *iy0 = 0; + if (ix1) *ix1 = 0; + if (iy1) *iy1 = 0; + } else { + // move to integral bboxes (treating pixels as little squares, what pixels get touched)? + if (ix0) *ix0 = STBTT_ifloor( x0 * scale_x + shift_x); + if (iy0) *iy0 = STBTT_ifloor(-y1 * scale_y + shift_y); + if (ix1) *ix1 = STBTT_iceil ( x1 * scale_x + shift_x); + if (iy1) *iy1 = STBTT_iceil (-y0 * scale_y + shift_y); + } +} + +STBTT_DEF void stbtt_GetGlyphBitmapBox(const stbtt_fontinfo *font, int glyph, float scale_x, float scale_y, int *ix0, int *iy0, int *ix1, int *iy1) +{ + stbtt_GetGlyphBitmapBoxSubpixel(font, glyph, scale_x, scale_y,0.0f,0.0f, ix0, iy0, ix1, iy1); +} + +STBTT_DEF void stbtt_GetCodepointBitmapBoxSubpixel(const stbtt_fontinfo *font, int codepoint, float scale_x, float scale_y, float shift_x, float shift_y, int *ix0, int *iy0, int *ix1, int *iy1) +{ + stbtt_GetGlyphBitmapBoxSubpixel(font, stbtt_FindGlyphIndex(font,codepoint), scale_x, scale_y,shift_x,shift_y, ix0,iy0,ix1,iy1); +} + +STBTT_DEF void stbtt_GetCodepointBitmapBox(const stbtt_fontinfo *font, int codepoint, float scale_x, float scale_y, int *ix0, int *iy0, int *ix1, int *iy1) +{ + stbtt_GetCodepointBitmapBoxSubpixel(font, codepoint, scale_x, scale_y,0.0f,0.0f, ix0,iy0,ix1,iy1); +} + +////////////////////////////////////////////////////////////////////////////// +// +// Rasterizer + +typedef struct stbtt__hheap_chunk +{ + struct stbtt__hheap_chunk *next; +} stbtt__hheap_chunk; + +typedef struct stbtt__hheap +{ + struct stbtt__hheap_chunk *head; + void *first_free; + int num_remaining_in_head_chunk; +} stbtt__hheap; + +static void *stbtt__hheap_alloc(stbtt__hheap *hh, size_t size, void *userdata) +{ + if (hh->first_free) { + void *p = hh->first_free; + hh->first_free = * (void **) p; + return p; + } else { + if (hh->num_remaining_in_head_chunk == 0) { + int count = (size < 32 ? 2000 : size < 128 ? 800 : 100); + stbtt__hheap_chunk *c = (stbtt__hheap_chunk *) STBTT_malloc(sizeof(stbtt__hheap_chunk) + size * count, userdata); + if (c == NULL) + return NULL; + c->next = hh->head; + hh->head = c; + hh->num_remaining_in_head_chunk = count; + } + --hh->num_remaining_in_head_chunk; + return (char *) (hh->head) + sizeof(stbtt__hheap_chunk) + size * hh->num_remaining_in_head_chunk; + } +} + +static void stbtt__hheap_free(stbtt__hheap *hh, void *p) +{ + *(void **) p = hh->first_free; + hh->first_free = p; +} + +static void stbtt__hheap_cleanup(stbtt__hheap *hh, void *userdata) +{ + stbtt__hheap_chunk *c = hh->head; + while (c) { + stbtt__hheap_chunk *n = c->next; + STBTT_free(c, userdata); + c = n; + } +} + +typedef struct stbtt__edge { + float x0,y0, x1,y1; + int invert; +} stbtt__edge; + + +typedef struct stbtt__active_edge +{ + struct stbtt__active_edge *next; + #if STBTT_RASTERIZER_VERSION==1 + int x,dx; + float ey; + int direction; + #elif STBTT_RASTERIZER_VERSION==2 + float fx,fdx,fdy; + float direction; + float sy; + float ey; + #else + #error "Unrecognized value of STBTT_RASTERIZER_VERSION" + #endif +} stbtt__active_edge; + +#if STBTT_RASTERIZER_VERSION == 1 +#define STBTT_FIXSHIFT 10 +#define STBTT_FIX (1 << STBTT_FIXSHIFT) +#define STBTT_FIXMASK (STBTT_FIX-1) + +static stbtt__active_edge *stbtt__new_active(stbtt__hheap *hh, stbtt__edge *e, int off_x, float start_point, void *userdata) +{ + stbtt__active_edge *z = (stbtt__active_edge *) stbtt__hheap_alloc(hh, sizeof(*z), userdata); + float dxdy = (e->x1 - e->x0) / (e->y1 - e->y0); + STBTT_assert(z != NULL); + if (!z) return z; + + // round dx down to avoid overshooting + if (dxdy < 0) + z->dx = -STBTT_ifloor(STBTT_FIX * -dxdy); + else + z->dx = STBTT_ifloor(STBTT_FIX * dxdy); + + z->x = STBTT_ifloor(STBTT_FIX * e->x0 + z->dx * (start_point - e->y0)); // use z->dx so when we offset later it's by the same amount + z->x -= off_x * STBTT_FIX; + + z->ey = e->y1; + z->next = 0; + z->direction = e->invert ? 1 : -1; + return z; +} +#elif STBTT_RASTERIZER_VERSION == 2 +static stbtt__active_edge *stbtt__new_active(stbtt__hheap *hh, stbtt__edge *e, int off_x, float start_point, void *userdata) +{ + stbtt__active_edge *z = (stbtt__active_edge *) stbtt__hheap_alloc(hh, sizeof(*z), userdata); + float dxdy = (e->x1 - e->x0) / (e->y1 - e->y0); + STBTT_assert(z != NULL); + //STBTT_assert(e->y0 <= start_point); + if (!z) return z; + z->fdx = dxdy; + z->fdy = dxdy != 0.0f ? (1.0f/dxdy) : 0.0f; + z->fx = e->x0 + dxdy * (start_point - e->y0); + z->fx -= off_x; + z->direction = e->invert ? 1.0f : -1.0f; + z->sy = e->y0; + z->ey = e->y1; + z->next = 0; + return z; +} +#else +#error "Unrecognized value of STBTT_RASTERIZER_VERSION" +#endif + +#if STBTT_RASTERIZER_VERSION == 1 +// note: this routine clips fills that extend off the edges... ideally this +// wouldn't happen, but it could happen if the truetype glyph bounding boxes +// are wrong, or if the user supplies a too-small bitmap +static void stbtt__fill_active_edges(unsigned char *scanline, int len, stbtt__active_edge *e, int max_weight) +{ + // non-zero winding fill + int x0=0, w=0; + + while (e) { + if (w == 0) { + // if we're currently at zero, we need to record the edge start point + x0 = e->x; w += e->direction; + } else { + int x1 = e->x; w += e->direction; + // if we went to zero, we need to draw + if (w == 0) { + int i = x0 >> STBTT_FIXSHIFT; + int j = x1 >> STBTT_FIXSHIFT; + + if (i < len && j >= 0) { + if (i == j) { + // x0,x1 are the same pixel, so compute combined coverage + scanline[i] = scanline[i] + (stbtt_uint8) ((x1 - x0) * max_weight >> STBTT_FIXSHIFT); + } else { + if (i >= 0) // add antialiasing for x0 + scanline[i] = scanline[i] + (stbtt_uint8) (((STBTT_FIX - (x0 & STBTT_FIXMASK)) * max_weight) >> STBTT_FIXSHIFT); + else + i = -1; // clip + + if (j < len) // add antialiasing for x1 + scanline[j] = scanline[j] + (stbtt_uint8) (((x1 & STBTT_FIXMASK) * max_weight) >> STBTT_FIXSHIFT); + else + j = len; // clip + + for (++i; i < j; ++i) // fill pixels between x0 and x1 + scanline[i] = scanline[i] + (stbtt_uint8) max_weight; + } + } + } + } + + e = e->next; + } +} + +static void stbtt__rasterize_sorted_edges(stbtt__bitmap *result, stbtt__edge *e, int n, int vsubsample, int off_x, int off_y, void *userdata) +{ + stbtt__hheap hh = { 0, 0, 0 }; + stbtt__active_edge *active = NULL; + int y,j=0; + int max_weight = (255 / vsubsample); // weight per vertical scanline + int s; // vertical subsample index + unsigned char scanline_data[512], *scanline; + + if (result->w > 512) + scanline = (unsigned char *) STBTT_malloc(result->w, userdata); + else + scanline = scanline_data; + + y = off_y * vsubsample; + e[n].y0 = (off_y + result->h) * (float) vsubsample + 1; + + while (j < result->h) { + STBTT_memset(scanline, 0, result->w); + for (s=0; s < vsubsample; ++s) { + // find center of pixel for this scanline + float scan_y = y + 0.5f; + stbtt__active_edge **step = &active; + + // update all active edges; + // remove all active edges that terminate before the center of this scanline + while (*step) { + stbtt__active_edge * z = *step; + if (z->ey <= scan_y) { + *step = z->next; // delete from list + STBTT_assert(z->direction); + z->direction = 0; + stbtt__hheap_free(&hh, z); + } else { + z->x += z->dx; // advance to position for current scanline + step = &((*step)->next); // advance through list + } + } + + // resort the list if needed + for(;;) { + int changed=0; + step = &active; + while (*step && (*step)->next) { + if ((*step)->x > (*step)->next->x) { + stbtt__active_edge *t = *step; + stbtt__active_edge *q = t->next; + + t->next = q->next; + q->next = t; + *step = q; + changed = 1; + } + step = &(*step)->next; + } + if (!changed) break; + } + + // insert all edges that start before the center of this scanline -- omit ones that also end on this scanline + while (e->y0 <= scan_y) { + if (e->y1 > scan_y) { + stbtt__active_edge *z = stbtt__new_active(&hh, e, off_x, scan_y, userdata); + if (z != NULL) { + // find insertion point + if (active == NULL) + active = z; + else if (z->x < active->x) { + // insert at front + z->next = active; + active = z; + } else { + // find thing to insert AFTER + stbtt__active_edge *p = active; + while (p->next && p->next->x < z->x) + p = p->next; + // at this point, p->next->x is NOT < z->x + z->next = p->next; + p->next = z; + } + } + } + ++e; + } + + // now process all active edges in XOR fashion + if (active) + stbtt__fill_active_edges(scanline, result->w, active, max_weight); + + ++y; + } + STBTT_memcpy(result->pixels + j * result->stride, scanline, result->w); + ++j; + } + + stbtt__hheap_cleanup(&hh, userdata); + + if (scanline != scanline_data) + STBTT_free(scanline, userdata); +} + +#elif STBTT_RASTERIZER_VERSION == 2 + +// the edge passed in here does not cross the vertical line at x or the vertical line at x+1 +// (i.e. it has already been clipped to those) +static void stbtt__handle_clipped_edge(float *scanline, int x, stbtt__active_edge *e, float x0, float y0, float x1, float y1) +{ + if (y0 == y1) return; + STBTT_assert(y0 < y1); + STBTT_assert(e->sy <= e->ey); + if (y0 > e->ey) return; + if (y1 < e->sy) return; + if (y0 < e->sy) { + x0 += (x1-x0) * (e->sy - y0) / (y1-y0); + y0 = e->sy; + } + if (y1 > e->ey) { + x1 += (x1-x0) * (e->ey - y1) / (y1-y0); + y1 = e->ey; + } + + if (x0 == x) + STBTT_assert(x1 <= x+1); + else if (x0 == x+1) + STBTT_assert(x1 >= x); + else if (x0 <= x) + STBTT_assert(x1 <= x); + else if (x0 >= x+1) + STBTT_assert(x1 >= x+1); + else + STBTT_assert(x1 >= x && x1 <= x+1); + + if (x0 <= x && x1 <= x) + scanline[x] += e->direction * (y1-y0); + else if (x0 >= x+1 && x1 >= x+1) + ; + else { + STBTT_assert(x0 >= x && x0 <= x+1 && x1 >= x && x1 <= x+1); + scanline[x] += e->direction * (y1-y0) * (1-((x0-x)+(x1-x))/2); // coverage = 1 - average x position + } +} + +static void stbtt__fill_active_edges_new(float *scanline, float *scanline_fill, int len, stbtt__active_edge *e, float y_top) +{ + float y_bottom = y_top+1; + + while (e) { + // brute force every pixel + + // compute intersection points with top & bottom + STBTT_assert(e->ey >= y_top); + + if (e->fdx == 0) { + float x0 = e->fx; + if (x0 < len) { + if (x0 >= 0) { + stbtt__handle_clipped_edge(scanline,(int) x0,e, x0,y_top, x0,y_bottom); + stbtt__handle_clipped_edge(scanline_fill-1,(int) x0+1,e, x0,y_top, x0,y_bottom); + } else { + stbtt__handle_clipped_edge(scanline_fill-1,0,e, x0,y_top, x0,y_bottom); + } + } + } else { + float x0 = e->fx; + float dx = e->fdx; + float xb = x0 + dx; + float x_top, x_bottom; + float sy0,sy1; + float dy = e->fdy; + STBTT_assert(e->sy <= y_bottom && e->ey >= y_top); + + // compute endpoints of line segment clipped to this scanline (if the + // line segment starts on this scanline. x0 is the intersection of the + // line with y_top, but that may be off the line segment. + if (e->sy > y_top) { + x_top = x0 + dx * (e->sy - y_top); + sy0 = e->sy; + } else { + x_top = x0; + sy0 = y_top; + } + if (e->ey < y_bottom) { + x_bottom = x0 + dx * (e->ey - y_top); + sy1 = e->ey; + } else { + x_bottom = xb; + sy1 = y_bottom; + } + + if (x_top >= 0 && x_bottom >= 0 && x_top < len && x_bottom < len) { + // from here on, we don't have to range check x values + + if ((int) x_top == (int) x_bottom) { + float height; + // simple case, only spans one pixel + int x = (int) x_top; + height = sy1 - sy0; + STBTT_assert(x >= 0 && x < len); + scanline[x] += e->direction * (1-((x_top - x) + (x_bottom-x))/2) * height; + scanline_fill[x] += e->direction * height; // everything right of this pixel is filled + } else { + int x,x1,x2; + float y_crossing, step, sign, area; + // covers 2+ pixels + if (x_top > x_bottom) { + // flip scanline vertically; signed area is the same + float t; + sy0 = y_bottom - (sy0 - y_top); + sy1 = y_bottom - (sy1 - y_top); + t = sy0, sy0 = sy1, sy1 = t; + t = x_bottom, x_bottom = x_top, x_top = t; + dx = -dx; + dy = -dy; + t = x0, x0 = xb, xb = t; + } + + x1 = (int) x_top; + x2 = (int) x_bottom; + // compute intersection with y axis at x1+1 + y_crossing = (x1+1 - x0) * dy + y_top; + + sign = e->direction; + // area of the rectangle covered from y0..y_crossing + area = sign * (y_crossing-sy0); + // area of the triangle (x_top,y0), (x+1,y0), (x+1,y_crossing) + scanline[x1] += area * (1-((x_top - x1)+(x1+1-x1))/2); + + step = sign * dy; + for (x = x1+1; x < x2; ++x) { + scanline[x] += area + step/2; + area += step; + } + y_crossing += dy * (x2 - (x1+1)); + + STBTT_assert(STBTT_fabs(area) <= 1.01f); + + scanline[x2] += area + sign * (1-((x2-x2)+(x_bottom-x2))/2) * (sy1-y_crossing); + + scanline_fill[x2] += sign * (sy1-sy0); + } + } else { + // if edge goes outside of box we're drawing, we require + // clipping logic. since this does not match the intended use + // of this library, we use a different, very slow brute + // force implementation + int x; + for (x=0; x < len; ++x) { + // cases: + // + // there can be up to two intersections with the pixel. any intersection + // with left or right edges can be handled by splitting into two (or three) + // regions. intersections with top & bottom do not necessitate case-wise logic. + // + // the old way of doing this found the intersections with the left & right edges, + // then used some simple logic to produce up to three segments in sorted order + // from top-to-bottom. however, this had a problem: if an x edge was epsilon + // across the x border, then the corresponding y position might not be distinct + // from the other y segment, and it might ignored as an empty segment. to avoid + // that, we need to explicitly produce segments based on x positions. + + // rename variables to clearly-defined pairs + float y0 = y_top; + float x1 = (float) (x); + float x2 = (float) (x+1); + float x3 = xb; + float y3 = y_bottom; + + // x = e->x + e->dx * (y-y_top) + // (y-y_top) = (x - e->x) / e->dx + // y = (x - e->x) / e->dx + y_top + float y1 = (x - x0) / dx + y_top; + float y2 = (x+1 - x0) / dx + y_top; + + if (x0 < x1 && x3 > x2) { // three segments descending down-right + stbtt__handle_clipped_edge(scanline,x,e, x0,y0, x1,y1); + stbtt__handle_clipped_edge(scanline,x,e, x1,y1, x2,y2); + stbtt__handle_clipped_edge(scanline,x,e, x2,y2, x3,y3); + } else if (x3 < x1 && x0 > x2) { // three segments descending down-left + stbtt__handle_clipped_edge(scanline,x,e, x0,y0, x2,y2); + stbtt__handle_clipped_edge(scanline,x,e, x2,y2, x1,y1); + stbtt__handle_clipped_edge(scanline,x,e, x1,y1, x3,y3); + } else if (x0 < x1 && x3 > x1) { // two segments across x, down-right + stbtt__handle_clipped_edge(scanline,x,e, x0,y0, x1,y1); + stbtt__handle_clipped_edge(scanline,x,e, x1,y1, x3,y3); + } else if (x3 < x1 && x0 > x1) { // two segments across x, down-left + stbtt__handle_clipped_edge(scanline,x,e, x0,y0, x1,y1); + stbtt__handle_clipped_edge(scanline,x,e, x1,y1, x3,y3); + } else if (x0 < x2 && x3 > x2) { // two segments across x+1, down-right + stbtt__handle_clipped_edge(scanline,x,e, x0,y0, x2,y2); + stbtt__handle_clipped_edge(scanline,x,e, x2,y2, x3,y3); + } else if (x3 < x2 && x0 > x2) { // two segments across x+1, down-left + stbtt__handle_clipped_edge(scanline,x,e, x0,y0, x2,y2); + stbtt__handle_clipped_edge(scanline,x,e, x2,y2, x3,y3); + } else { // one segment + stbtt__handle_clipped_edge(scanline,x,e, x0,y0, x3,y3); + } + } + } + } + e = e->next; + } +} + +// directly AA rasterize edges w/o supersampling +static void stbtt__rasterize_sorted_edges(stbtt__bitmap *result, stbtt__edge *e, int n, int vsubsample, int off_x, int off_y, void *userdata) +{ + stbtt__hheap hh = { 0, 0, 0 }; + stbtt__active_edge *active = NULL; + int y,j=0, i; + float scanline_data[129], *scanline, *scanline2; + + STBTT__NOTUSED(vsubsample); + + if (result->w > 64) + scanline = (float *) STBTT_malloc((result->w*2+1) * sizeof(float), userdata); + else + scanline = scanline_data; + + scanline2 = scanline + result->w; + + y = off_y; + e[n].y0 = (float) (off_y + result->h) + 1; + + while (j < result->h) { + // find center of pixel for this scanline + float scan_y_top = y + 0.0f; + float scan_y_bottom = y + 1.0f; + stbtt__active_edge **step = &active; + + STBTT_memset(scanline , 0, result->w*sizeof(scanline[0])); + STBTT_memset(scanline2, 0, (result->w+1)*sizeof(scanline[0])); + + // update all active edges; + // remove all active edges that terminate before the top of this scanline + while (*step) { + stbtt__active_edge * z = *step; + if (z->ey <= scan_y_top) { + *step = z->next; // delete from list + STBTT_assert(z->direction); + z->direction = 0; + stbtt__hheap_free(&hh, z); + } else { + step = &((*step)->next); // advance through list + } + } + + // insert all edges that start before the bottom of this scanline + while (e->y0 <= scan_y_bottom) { + if (e->y0 != e->y1) { + stbtt__active_edge *z = stbtt__new_active(&hh, e, off_x, scan_y_top, userdata); + if (z != NULL) { + if (j == 0 && off_y != 0) { + if (z->ey < scan_y_top) { + // this can happen due to subpixel positioning and some kind of fp rounding error i think + z->ey = scan_y_top; + } + } + STBTT_assert(z->ey >= scan_y_top); // if we get really unlucky a tiny bit of an edge can be out of bounds + // insert at front + z->next = active; + active = z; + } + } + ++e; + } + + // now process all active edges + if (active) + stbtt__fill_active_edges_new(scanline, scanline2+1, result->w, active, scan_y_top); + + { + float sum = 0; + for (i=0; i < result->w; ++i) { + float k; + int m; + sum += scanline2[i]; + k = scanline[i] + sum; + k = (float) STBTT_fabs(k)*255 + 0.5f; + m = (int) k; + if (m > 255) m = 255; + result->pixels[j*result->stride + i] = (unsigned char) m; + } + } + // advance all the edges + step = &active; + while (*step) { + stbtt__active_edge *z = *step; + z->fx += z->fdx; // advance to position for current scanline + step = &((*step)->next); // advance through list + } + + ++y; + ++j; + } + + stbtt__hheap_cleanup(&hh, userdata); + + if (scanline != scanline_data) + STBTT_free(scanline, userdata); +} +#else +#error "Unrecognized value of STBTT_RASTERIZER_VERSION" +#endif + +#define STBTT__COMPARE(a,b) ((a)->y0 < (b)->y0) + +static void stbtt__sort_edges_ins_sort(stbtt__edge *p, int n) +{ + int i,j; + for (i=1; i < n; ++i) { + stbtt__edge t = p[i], *a = &t; + j = i; + while (j > 0) { + stbtt__edge *b = &p[j-1]; + int c = STBTT__COMPARE(a,b); + if (!c) break; + p[j] = p[j-1]; + --j; + } + if (i != j) + p[j] = t; + } +} + +static void stbtt__sort_edges_quicksort(stbtt__edge *p, int n) +{ + /* threshold for transitioning to insertion sort */ + while (n > 12) { + stbtt__edge t; + int c01,c12,c,m,i,j; + + /* compute median of three */ + m = n >> 1; + c01 = STBTT__COMPARE(&p[0],&p[m]); + c12 = STBTT__COMPARE(&p[m],&p[n-1]); + /* if 0 >= mid >= end, or 0 < mid < end, then use mid */ + if (c01 != c12) { + /* otherwise, we'll need to swap something else to middle */ + int z; + c = STBTT__COMPARE(&p[0],&p[n-1]); + /* 0>mid && midn => n; 0 0 */ + /* 0n: 0>n => 0; 0 n */ + z = (c == c12) ? 0 : n-1; + t = p[z]; + p[z] = p[m]; + p[m] = t; + } + /* now p[m] is the median-of-three */ + /* swap it to the beginning so it won't move around */ + t = p[0]; + p[0] = p[m]; + p[m] = t; + + /* partition loop */ + i=1; + j=n-1; + for(;;) { + /* handling of equality is crucial here */ + /* for sentinels & efficiency with duplicates */ + for (;;++i) { + if (!STBTT__COMPARE(&p[i], &p[0])) break; + } + for (;;--j) { + if (!STBTT__COMPARE(&p[0], &p[j])) break; + } + /* make sure we haven't crossed */ + if (i >= j) break; + t = p[i]; + p[i] = p[j]; + p[j] = t; + + ++i; + --j; + } + /* recurse on smaller side, iterate on larger */ + if (j < (n-i)) { + stbtt__sort_edges_quicksort(p,j); + p = p+i; + n = n-i; + } else { + stbtt__sort_edges_quicksort(p+i, n-i); + n = j; + } + } +} + +static void stbtt__sort_edges(stbtt__edge *p, int n) +{ + stbtt__sort_edges_quicksort(p, n); + stbtt__sort_edges_ins_sort(p, n); +} + +typedef struct +{ + float x,y; +} stbtt__point; + +static void stbtt__rasterize(stbtt__bitmap *result, stbtt__point *pts, int *wcount, int windings, float scale_x, float scale_y, float shift_x, float shift_y, int off_x, int off_y, int invert, void *userdata) +{ + float y_scale_inv = invert ? -scale_y : scale_y; + stbtt__edge *e; + int n,i,j,k,m; +#if STBTT_RASTERIZER_VERSION == 1 + int vsubsample = result->h < 8 ? 15 : 5; +#elif STBTT_RASTERIZER_VERSION == 2 + int vsubsample = 1; +#else + #error "Unrecognized value of STBTT_RASTERIZER_VERSION" +#endif + // vsubsample should divide 255 evenly; otherwise we won't reach full opacity + + // now we have to blow out the windings into explicit edge lists + n = 0; + for (i=0; i < windings; ++i) + n += wcount[i]; + + e = (stbtt__edge *) STBTT_malloc(sizeof(*e) * (n+1), userdata); // add an extra one as a sentinel + if (e == 0) return; + n = 0; + + m=0; + for (i=0; i < windings; ++i) { + stbtt__point *p = pts + m; + m += wcount[i]; + j = wcount[i]-1; + for (k=0; k < wcount[i]; j=k++) { + int a=k,b=j; + // skip the edge if horizontal + if (p[j].y == p[k].y) + continue; + // add edge from j to k to the list + e[n].invert = 0; + if (invert ? p[j].y > p[k].y : p[j].y < p[k].y) { + e[n].invert = 1; + a=j,b=k; + } + e[n].x0 = p[a].x * scale_x + shift_x; + e[n].y0 = (p[a].y * y_scale_inv + shift_y) * vsubsample; + e[n].x1 = p[b].x * scale_x + shift_x; + e[n].y1 = (p[b].y * y_scale_inv + shift_y) * vsubsample; + ++n; + } + } + + // now sort the edges by their highest point (should snap to integer, and then by x) + //STBTT_sort(e, n, sizeof(e[0]), stbtt__edge_compare); + stbtt__sort_edges(e, n); + + // now, traverse the scanlines and find the intersections on each scanline, use xor winding rule + stbtt__rasterize_sorted_edges(result, e, n, vsubsample, off_x, off_y, userdata); + + STBTT_free(e, userdata); +} + +static void stbtt__add_point(stbtt__point *points, int n, float x, float y) +{ + if (!points) return; // during first pass, it's unallocated + points[n].x = x; + points[n].y = y; +} + +// tessellate until threshold p is happy... @TODO warped to compensate for non-linear stretching +static int stbtt__tesselate_curve(stbtt__point *points, int *num_points, float x0, float y0, float x1, float y1, float x2, float y2, float objspace_flatness_squared, int n) +{ + // midpoint + float mx = (x0 + 2*x1 + x2)/4; + float my = (y0 + 2*y1 + y2)/4; + // versus directly drawn line + float dx = (x0+x2)/2 - mx; + float dy = (y0+y2)/2 - my; + if (n > 16) // 65536 segments on one curve better be enough! + return 1; + if (dx*dx+dy*dy > objspace_flatness_squared) { // half-pixel error allowed... need to be smaller if AA + stbtt__tesselate_curve(points, num_points, x0,y0, (x0+x1)/2.0f,(y0+y1)/2.0f, mx,my, objspace_flatness_squared,n+1); + stbtt__tesselate_curve(points, num_points, mx,my, (x1+x2)/2.0f,(y1+y2)/2.0f, x2,y2, objspace_flatness_squared,n+1); + } else { + stbtt__add_point(points, *num_points,x2,y2); + *num_points = *num_points+1; + } + return 1; +} + +static void stbtt__tesselate_cubic(stbtt__point *points, int *num_points, float x0, float y0, float x1, float y1, float x2, float y2, float x3, float y3, float objspace_flatness_squared, int n) +{ + // @TODO this "flatness" calculation is just made-up nonsense that seems to work well enough + float dx0 = x1-x0; + float dy0 = y1-y0; + float dx1 = x2-x1; + float dy1 = y2-y1; + float dx2 = x3-x2; + float dy2 = y3-y2; + float dx = x3-x0; + float dy = y3-y0; + float longlen = (float) (STBTT_sqrt(dx0*dx0+dy0*dy0)+STBTT_sqrt(dx1*dx1+dy1*dy1)+STBTT_sqrt(dx2*dx2+dy2*dy2)); + float shortlen = (float) STBTT_sqrt(dx*dx+dy*dy); + float flatness_squared = longlen*longlen-shortlen*shortlen; + + if (n > 16) // 65536 segments on one curve better be enough! + return; + + if (flatness_squared > objspace_flatness_squared) { + float x01 = (x0+x1)/2; + float y01 = (y0+y1)/2; + float x12 = (x1+x2)/2; + float y12 = (y1+y2)/2; + float x23 = (x2+x3)/2; + float y23 = (y2+y3)/2; + + float xa = (x01+x12)/2; + float ya = (y01+y12)/2; + float xb = (x12+x23)/2; + float yb = (y12+y23)/2; + + float mx = (xa+xb)/2; + float my = (ya+yb)/2; + + stbtt__tesselate_cubic(points, num_points, x0,y0, x01,y01, xa,ya, mx,my, objspace_flatness_squared,n+1); + stbtt__tesselate_cubic(points, num_points, mx,my, xb,yb, x23,y23, x3,y3, objspace_flatness_squared,n+1); + } else { + stbtt__add_point(points, *num_points,x3,y3); + *num_points = *num_points+1; + } +} + +// returns number of contours +static stbtt__point *stbtt_FlattenCurves(stbtt_vertex *vertices, int num_verts, float objspace_flatness, int **contour_lengths, int *num_contours, void *userdata) +{ + stbtt__point *points=0; + int num_points=0; + + float objspace_flatness_squared = objspace_flatness * objspace_flatness; + int i,n=0,start=0, pass; + + // count how many "moves" there are to get the contour count + for (i=0; i < num_verts; ++i) + if (vertices[i].type == STBTT_vmove) + ++n; + + *num_contours = n; + if (n == 0) return 0; + + *contour_lengths = (int *) STBTT_malloc(sizeof(**contour_lengths) * n, userdata); + + if (*contour_lengths == 0) { + *num_contours = 0; + return 0; + } + + // make two passes through the points so we don't need to realloc + for (pass=0; pass < 2; ++pass) { + float x=0,y=0; + if (pass == 1) { + points = (stbtt__point *) STBTT_malloc(num_points * sizeof(points[0]), userdata); + if (points == NULL) goto error; + } + num_points = 0; + n= -1; + for (i=0; i < num_verts; ++i) { + switch (vertices[i].type) { + case STBTT_vmove: + // start the next contour + if (n >= 0) + (*contour_lengths)[n] = num_points - start; + ++n; + start = num_points; + + x = vertices[i].x, y = vertices[i].y; + stbtt__add_point(points, num_points++, x,y); + break; + case STBTT_vline: + x = vertices[i].x, y = vertices[i].y; + stbtt__add_point(points, num_points++, x, y); + break; + case STBTT_vcurve: + stbtt__tesselate_curve(points, &num_points, x,y, + vertices[i].cx, vertices[i].cy, + vertices[i].x, vertices[i].y, + objspace_flatness_squared, 0); + x = vertices[i].x, y = vertices[i].y; + break; + case STBTT_vcubic: + stbtt__tesselate_cubic(points, &num_points, x,y, + vertices[i].cx, vertices[i].cy, + vertices[i].cx1, vertices[i].cy1, + vertices[i].x, vertices[i].y, + objspace_flatness_squared, 0); + x = vertices[i].x, y = vertices[i].y; + break; + } + } + (*contour_lengths)[n] = num_points - start; + } + + return points; +error: + STBTT_free(points, userdata); + STBTT_free(*contour_lengths, userdata); + *contour_lengths = 0; + *num_contours = 0; + return NULL; +} + +STBTT_DEF void stbtt_Rasterize(stbtt__bitmap *result, float flatness_in_pixels, stbtt_vertex *vertices, int num_verts, float scale_x, float scale_y, float shift_x, float shift_y, int x_off, int y_off, int invert, void *userdata) +{ + float scale = scale_x > scale_y ? scale_y : scale_x; + int winding_count = 0; + int *winding_lengths = NULL; + stbtt__point *windings = stbtt_FlattenCurves(vertices, num_verts, flatness_in_pixels / scale, &winding_lengths, &winding_count, userdata); + if (windings) { + stbtt__rasterize(result, windings, winding_lengths, winding_count, scale_x, scale_y, shift_x, shift_y, x_off, y_off, invert, userdata); + STBTT_free(winding_lengths, userdata); + STBTT_free(windings, userdata); + } +} + +STBTT_DEF void stbtt_FreeBitmap(unsigned char *bitmap, void *userdata) +{ + STBTT_free(bitmap, userdata); +} + +STBTT_DEF unsigned char *stbtt_GetGlyphBitmapSubpixel(const stbtt_fontinfo *info, float scale_x, float scale_y, float shift_x, float shift_y, int glyph, int *width, int *height, int *xoff, int *yoff) +{ + int ix0,iy0,ix1,iy1; + stbtt__bitmap gbm; + stbtt_vertex *vertices; + int num_verts = stbtt_GetGlyphShape(info, glyph, &vertices); + + if (scale_x == 0) scale_x = scale_y; + if (scale_y == 0) { + if (scale_x == 0) { + STBTT_free(vertices, info->userdata); + return NULL; + } + scale_y = scale_x; + } + + stbtt_GetGlyphBitmapBoxSubpixel(info, glyph, scale_x, scale_y, shift_x, shift_y, &ix0,&iy0,&ix1,&iy1); + + // now we get the size + gbm.w = (ix1 - ix0); + gbm.h = (iy1 - iy0); + gbm.pixels = NULL; // in case we error + + if (width ) *width = gbm.w; + if (height) *height = gbm.h; + if (xoff ) *xoff = ix0; + if (yoff ) *yoff = iy0; + + if (gbm.w && gbm.h) { + gbm.pixels = (unsigned char *) STBTT_malloc(gbm.w * gbm.h, info->userdata); + if (gbm.pixels) { + gbm.stride = gbm.w; + + stbtt_Rasterize(&gbm, 0.35f, vertices, num_verts, scale_x, scale_y, shift_x, shift_y, ix0, iy0, 1, info->userdata); + } + } + STBTT_free(vertices, info->userdata); + return gbm.pixels; +} + +STBTT_DEF unsigned char *stbtt_GetGlyphBitmap(const stbtt_fontinfo *info, float scale_x, float scale_y, int glyph, int *width, int *height, int *xoff, int *yoff) +{ + return stbtt_GetGlyphBitmapSubpixel(info, scale_x, scale_y, 0.0f, 0.0f, glyph, width, height, xoff, yoff); +} + +STBTT_DEF void stbtt_MakeGlyphBitmapSubpixel(const stbtt_fontinfo *info, unsigned char *output, int out_w, int out_h, int out_stride, float scale_x, float scale_y, float shift_x, float shift_y, int glyph) +{ + int ix0,iy0; + stbtt_vertex *vertices; + int num_verts = stbtt_GetGlyphShape(info, glyph, &vertices); + stbtt__bitmap gbm; + + stbtt_GetGlyphBitmapBoxSubpixel(info, glyph, scale_x, scale_y, shift_x, shift_y, &ix0,&iy0,0,0); + gbm.pixels = output; + gbm.w = out_w; + gbm.h = out_h; + gbm.stride = out_stride; + + if (gbm.w && gbm.h) + stbtt_Rasterize(&gbm, 0.35f, vertices, num_verts, scale_x, scale_y, shift_x, shift_y, ix0,iy0, 1, info->userdata); + + STBTT_free(vertices, info->userdata); +} + +STBTT_DEF void stbtt_MakeGlyphBitmap(const stbtt_fontinfo *info, unsigned char *output, int out_w, int out_h, int out_stride, float scale_x, float scale_y, int glyph) +{ + stbtt_MakeGlyphBitmapSubpixel(info, output, out_w, out_h, out_stride, scale_x, scale_y, 0.0f,0.0f, glyph); +} + +STBTT_DEF unsigned char *stbtt_GetCodepointBitmapSubpixel(const stbtt_fontinfo *info, float scale_x, float scale_y, float shift_x, float shift_y, int codepoint, int *width, int *height, int *xoff, int *yoff) +{ + return stbtt_GetGlyphBitmapSubpixel(info, scale_x, scale_y,shift_x,shift_y, stbtt_FindGlyphIndex(info,codepoint), width,height,xoff,yoff); +} + +STBTT_DEF void stbtt_MakeCodepointBitmapSubpixelPrefilter(const stbtt_fontinfo *info, unsigned char *output, int out_w, int out_h, int out_stride, float scale_x, float scale_y, float shift_x, float shift_y, int oversample_x, int oversample_y, float *sub_x, float *sub_y, int codepoint) +{ + stbtt_MakeGlyphBitmapSubpixelPrefilter(info, output, out_w, out_h, out_stride, scale_x, scale_y, shift_x, shift_y, oversample_x, oversample_y, sub_x, sub_y, stbtt_FindGlyphIndex(info,codepoint)); +} + +STBTT_DEF void stbtt_MakeCodepointBitmapSubpixel(const stbtt_fontinfo *info, unsigned char *output, int out_w, int out_h, int out_stride, float scale_x, float scale_y, float shift_x, float shift_y, int codepoint) +{ + stbtt_MakeGlyphBitmapSubpixel(info, output, out_w, out_h, out_stride, scale_x, scale_y, shift_x, shift_y, stbtt_FindGlyphIndex(info,codepoint)); +} + +STBTT_DEF unsigned char *stbtt_GetCodepointBitmap(const stbtt_fontinfo *info, float scale_x, float scale_y, int codepoint, int *width, int *height, int *xoff, int *yoff) +{ + return stbtt_GetCodepointBitmapSubpixel(info, scale_x, scale_y, 0.0f,0.0f, codepoint, width,height,xoff,yoff); +} + +STBTT_DEF void stbtt_MakeCodepointBitmap(const stbtt_fontinfo *info, unsigned char *output, int out_w, int out_h, int out_stride, float scale_x, float scale_y, int codepoint) +{ + stbtt_MakeCodepointBitmapSubpixel(info, output, out_w, out_h, out_stride, scale_x, scale_y, 0.0f,0.0f, codepoint); +} + +////////////////////////////////////////////////////////////////////////////// +// +// bitmap baking +// +// This is SUPER-CRAPPY packing to keep source code small + +static int stbtt_BakeFontBitmap_internal(unsigned char *data, int offset, // font location (use offset=0 for plain .ttf) + float pixel_height, // height of font in pixels + unsigned char *pixels, int pw, int ph, // bitmap to be filled in + int first_char, int num_chars, // characters to bake + stbtt_bakedchar *chardata) +{ + float scale; + int x,y,bottom_y, i; + stbtt_fontinfo f; + f.userdata = NULL; + if (!stbtt_InitFont(&f, data, offset)) + return -1; + STBTT_memset(pixels, 0, pw*ph); // background of 0 around pixels + x=y=1; + bottom_y = 1; + + scale = stbtt_ScaleForPixelHeight(&f, pixel_height); + + for (i=0; i < num_chars; ++i) { + int advance, lsb, x0,y0,x1,y1,gw,gh; + int g = stbtt_FindGlyphIndex(&f, first_char + i); + stbtt_GetGlyphHMetrics(&f, g, &advance, &lsb); + stbtt_GetGlyphBitmapBox(&f, g, scale,scale, &x0,&y0,&x1,&y1); + gw = x1-x0; + gh = y1-y0; + if (x + gw + 1 >= pw) + y = bottom_y, x = 1; // advance to next row + if (y + gh + 1 >= ph) // check if it fits vertically AFTER potentially moving to next row + return -i; + STBTT_assert(x+gw < pw); + STBTT_assert(y+gh < ph); + stbtt_MakeGlyphBitmap(&f, pixels+x+y*pw, gw,gh,pw, scale,scale, g); + chardata[i].x0 = (stbtt_int16) x; + chardata[i].y0 = (stbtt_int16) y; + chardata[i].x1 = (stbtt_int16) (x + gw); + chardata[i].y1 = (stbtt_int16) (y + gh); + chardata[i].xadvance = scale * advance; + chardata[i].xoff = (float) x0; + chardata[i].yoff = (float) y0; + x = x + gw + 1; + if (y+gh+1 > bottom_y) + bottom_y = y+gh+1; + } + return bottom_y; +} + +STBTT_DEF void stbtt_GetBakedQuad(const stbtt_bakedchar *chardata, int pw, int ph, int char_index, float *xpos, float *ypos, stbtt_aligned_quad *q, int opengl_fillrule) +{ + float d3d_bias = opengl_fillrule ? 0 : -0.5f; + float ipw = 1.0f / pw, iph = 1.0f / ph; + const stbtt_bakedchar *b = chardata + char_index; + int round_x = STBTT_ifloor((*xpos + b->xoff) + 0.5f); + int round_y = STBTT_ifloor((*ypos + b->yoff) + 0.5f); + + q->x0 = round_x + d3d_bias; + q->y0 = round_y + d3d_bias; + q->x1 = round_x + b->x1 - b->x0 + d3d_bias; + q->y1 = round_y + b->y1 - b->y0 + d3d_bias; + + q->s0 = b->x0 * ipw; + q->t0 = b->y0 * iph; + q->s1 = b->x1 * ipw; + q->t1 = b->y1 * iph; + + *xpos += b->xadvance; +} + +////////////////////////////////////////////////////////////////////////////// +// +// rectangle packing replacement routines if you don't have stb_rect_pack.h +// + +#ifndef STB_RECT_PACK_VERSION + +typedef int stbrp_coord; + +//////////////////////////////////////////////////////////////////////////////////// +// // +// // +// COMPILER WARNING ?!?!? // +// // +// // +// if you get a compile warning due to these symbols being defined more than // +// once, move #include "stb_rect_pack.h" before #include "stb_truetype.h" // +// // +//////////////////////////////////////////////////////////////////////////////////// + +typedef struct +{ + int width,height; + int x,y,bottom_y; +} stbrp_context; + +typedef struct +{ + unsigned char x; +} stbrp_node; + +struct stbrp_rect +{ + stbrp_coord x,y; + int id,w,h,was_packed; +}; + +static void stbrp_init_target(stbrp_context *con, int pw, int ph, stbrp_node *nodes, int num_nodes) +{ + con->width = pw; + con->height = ph; + con->x = 0; + con->y = 0; + con->bottom_y = 0; + STBTT__NOTUSED(nodes); + STBTT__NOTUSED(num_nodes); +} + +static void stbrp_pack_rects(stbrp_context *con, stbrp_rect *rects, int num_rects) +{ + int i; + for (i=0; i < num_rects; ++i) { + if (con->x + rects[i].w > con->width) { + con->x = 0; + con->y = con->bottom_y; + } + if (con->y + rects[i].h > con->height) + break; + rects[i].x = con->x; + rects[i].y = con->y; + rects[i].was_packed = 1; + con->x += rects[i].w; + if (con->y + rects[i].h > con->bottom_y) + con->bottom_y = con->y + rects[i].h; + } + for ( ; i < num_rects; ++i) + rects[i].was_packed = 0; +} +#endif + +////////////////////////////////////////////////////////////////////////////// +// +// bitmap baking +// +// This is SUPER-AWESOME (tm Ryan Gordon) packing using stb_rect_pack.h. If +// stb_rect_pack.h isn't available, it uses the BakeFontBitmap strategy. + +STBTT_DEF int stbtt_PackBegin(stbtt_pack_context *spc, unsigned char *pixels, int pw, int ph, int stride_in_bytes, int padding, void *alloc_context) +{ + stbrp_context *context = (stbrp_context *) STBTT_malloc(sizeof(*context) ,alloc_context); + int num_nodes = pw - padding; + stbrp_node *nodes = (stbrp_node *) STBTT_malloc(sizeof(*nodes ) * num_nodes,alloc_context); + + if (context == NULL || nodes == NULL) { + if (context != NULL) STBTT_free(context, alloc_context); + if (nodes != NULL) STBTT_free(nodes , alloc_context); + return 0; + } + + spc->user_allocator_context = alloc_context; + spc->width = pw; + spc->height = ph; + spc->pixels = pixels; + spc->pack_info = context; + spc->nodes = nodes; + spc->padding = padding; + spc->stride_in_bytes = stride_in_bytes != 0 ? stride_in_bytes : pw; + spc->h_oversample = 1; + spc->v_oversample = 1; + spc->skip_missing = 0; + + stbrp_init_target(context, pw-padding, ph-padding, nodes, num_nodes); + + if (pixels) + STBTT_memset(pixels, 0, pw*ph); // background of 0 around pixels + + return 1; +} + +STBTT_DEF void stbtt_PackEnd (stbtt_pack_context *spc) +{ + STBTT_free(spc->nodes , spc->user_allocator_context); + STBTT_free(spc->pack_info, spc->user_allocator_context); +} + +STBTT_DEF void stbtt_PackSetOversampling(stbtt_pack_context *spc, unsigned int h_oversample, unsigned int v_oversample) +{ + STBTT_assert(h_oversample <= STBTT_MAX_OVERSAMPLE); + STBTT_assert(v_oversample <= STBTT_MAX_OVERSAMPLE); + if (h_oversample <= STBTT_MAX_OVERSAMPLE) + spc->h_oversample = h_oversample; + if (v_oversample <= STBTT_MAX_OVERSAMPLE) + spc->v_oversample = v_oversample; +} + +STBTT_DEF void stbtt_PackSetSkipMissingCodepoints(stbtt_pack_context *spc, int skip) +{ + spc->skip_missing = skip; +} + +#define STBTT__OVER_MASK (STBTT_MAX_OVERSAMPLE-1) + +static void stbtt__h_prefilter(unsigned char *pixels, int w, int h, int stride_in_bytes, unsigned int kernel_width) +{ + unsigned char buffer[STBTT_MAX_OVERSAMPLE]; + int safe_w = w - kernel_width; + int j; + STBTT_memset(buffer, 0, STBTT_MAX_OVERSAMPLE); // suppress bogus warning from VS2013 -analyze + for (j=0; j < h; ++j) { + int i; + unsigned int total; + STBTT_memset(buffer, 0, kernel_width); + + total = 0; + + // make kernel_width a constant in common cases so compiler can optimize out the divide + switch (kernel_width) { + case 2: + for (i=0; i <= safe_w; ++i) { + total += pixels[i] - buffer[i & STBTT__OVER_MASK]; + buffer[(i+kernel_width) & STBTT__OVER_MASK] = pixels[i]; + pixels[i] = (unsigned char) (total / 2); + } + break; + case 3: + for (i=0; i <= safe_w; ++i) { + total += pixels[i] - buffer[i & STBTT__OVER_MASK]; + buffer[(i+kernel_width) & STBTT__OVER_MASK] = pixels[i]; + pixels[i] = (unsigned char) (total / 3); + } + break; + case 4: + for (i=0; i <= safe_w; ++i) { + total += pixels[i] - buffer[i & STBTT__OVER_MASK]; + buffer[(i+kernel_width) & STBTT__OVER_MASK] = pixels[i]; + pixels[i] = (unsigned char) (total / 4); + } + break; + case 5: + for (i=0; i <= safe_w; ++i) { + total += pixels[i] - buffer[i & STBTT__OVER_MASK]; + buffer[(i+kernel_width) & STBTT__OVER_MASK] = pixels[i]; + pixels[i] = (unsigned char) (total / 5); + } + break; + default: + for (i=0; i <= safe_w; ++i) { + total += pixels[i] - buffer[i & STBTT__OVER_MASK]; + buffer[(i+kernel_width) & STBTT__OVER_MASK] = pixels[i]; + pixels[i] = (unsigned char) (total / kernel_width); + } + break; + } + + for (; i < w; ++i) { + STBTT_assert(pixels[i] == 0); + total -= buffer[i & STBTT__OVER_MASK]; + pixels[i] = (unsigned char) (total / kernel_width); + } + + pixels += stride_in_bytes; + } +} + +static void stbtt__v_prefilter(unsigned char *pixels, int w, int h, int stride_in_bytes, unsigned int kernel_width) +{ + unsigned char buffer[STBTT_MAX_OVERSAMPLE]; + int safe_h = h - kernel_width; + int j; + STBTT_memset(buffer, 0, STBTT_MAX_OVERSAMPLE); // suppress bogus warning from VS2013 -analyze + for (j=0; j < w; ++j) { + int i; + unsigned int total; + STBTT_memset(buffer, 0, kernel_width); + + total = 0; + + // make kernel_width a constant in common cases so compiler can optimize out the divide + switch (kernel_width) { + case 2: + for (i=0; i <= safe_h; ++i) { + total += pixels[i*stride_in_bytes] - buffer[i & STBTT__OVER_MASK]; + buffer[(i+kernel_width) & STBTT__OVER_MASK] = pixels[i*stride_in_bytes]; + pixels[i*stride_in_bytes] = (unsigned char) (total / 2); + } + break; + case 3: + for (i=0; i <= safe_h; ++i) { + total += pixels[i*stride_in_bytes] - buffer[i & STBTT__OVER_MASK]; + buffer[(i+kernel_width) & STBTT__OVER_MASK] = pixels[i*stride_in_bytes]; + pixels[i*stride_in_bytes] = (unsigned char) (total / 3); + } + break; + case 4: + for (i=0; i <= safe_h; ++i) { + total += pixels[i*stride_in_bytes] - buffer[i & STBTT__OVER_MASK]; + buffer[(i+kernel_width) & STBTT__OVER_MASK] = pixels[i*stride_in_bytes]; + pixels[i*stride_in_bytes] = (unsigned char) (total / 4); + } + break; + case 5: + for (i=0; i <= safe_h; ++i) { + total += pixels[i*stride_in_bytes] - buffer[i & STBTT__OVER_MASK]; + buffer[(i+kernel_width) & STBTT__OVER_MASK] = pixels[i*stride_in_bytes]; + pixels[i*stride_in_bytes] = (unsigned char) (total / 5); + } + break; + default: + for (i=0; i <= safe_h; ++i) { + total += pixels[i*stride_in_bytes] - buffer[i & STBTT__OVER_MASK]; + buffer[(i+kernel_width) & STBTT__OVER_MASK] = pixels[i*stride_in_bytes]; + pixels[i*stride_in_bytes] = (unsigned char) (total / kernel_width); + } + break; + } + + for (; i < h; ++i) { + STBTT_assert(pixels[i*stride_in_bytes] == 0); + total -= buffer[i & STBTT__OVER_MASK]; + pixels[i*stride_in_bytes] = (unsigned char) (total / kernel_width); + } + + pixels += 1; + } +} + +static float stbtt__oversample_shift(int oversample) +{ + if (!oversample) + return 0.0f; + + // The prefilter is a box filter of width "oversample", + // which shifts phase by (oversample - 1)/2 pixels in + // oversampled space. We want to shift in the opposite + // direction to counter this. + return (float)-(oversample - 1) / (2.0f * (float)oversample); +} + +// rects array must be big enough to accommodate all characters in the given ranges +STBTT_DEF int stbtt_PackFontRangesGatherRects(stbtt_pack_context *spc, const stbtt_fontinfo *info, stbtt_pack_range *ranges, int num_ranges, stbrp_rect *rects) +{ + int i,j,k; + int missing_glyph_added = 0; + + k=0; + for (i=0; i < num_ranges; ++i) { + float fh = ranges[i].font_size; + float scale = fh > 0 ? stbtt_ScaleForPixelHeight(info, fh) : stbtt_ScaleForMappingEmToPixels(info, -fh); + ranges[i].h_oversample = (unsigned char) spc->h_oversample; + ranges[i].v_oversample = (unsigned char) spc->v_oversample; + for (j=0; j < ranges[i].num_chars; ++j) { + int x0,y0,x1,y1; + int codepoint = ranges[i].array_of_unicode_codepoints == NULL ? ranges[i].first_unicode_codepoint_in_range + j : ranges[i].array_of_unicode_codepoints[j]; + int glyph = stbtt_FindGlyphIndex(info, codepoint); + if (glyph == 0 && (spc->skip_missing || missing_glyph_added)) { + rects[k].w = rects[k].h = 0; + } else { + stbtt_GetGlyphBitmapBoxSubpixel(info,glyph, + scale * spc->h_oversample, + scale * spc->v_oversample, + 0,0, + &x0,&y0,&x1,&y1); + rects[k].w = (stbrp_coord) (x1-x0 + spc->padding + spc->h_oversample-1); + rects[k].h = (stbrp_coord) (y1-y0 + spc->padding + spc->v_oversample-1); + if (glyph == 0) + missing_glyph_added = 1; + } + ++k; + } + } + + return k; +} + +STBTT_DEF void stbtt_MakeGlyphBitmapSubpixelPrefilter(const stbtt_fontinfo *info, unsigned char *output, int out_w, int out_h, int out_stride, float scale_x, float scale_y, float shift_x, float shift_y, int prefilter_x, int prefilter_y, float *sub_x, float *sub_y, int glyph) +{ + stbtt_MakeGlyphBitmapSubpixel(info, + output, + out_w - (prefilter_x - 1), + out_h - (prefilter_y - 1), + out_stride, + scale_x, + scale_y, + shift_x, + shift_y, + glyph); + + if (prefilter_x > 1) + stbtt__h_prefilter(output, out_w, out_h, out_stride, prefilter_x); + + if (prefilter_y > 1) + stbtt__v_prefilter(output, out_w, out_h, out_stride, prefilter_y); + + *sub_x = stbtt__oversample_shift(prefilter_x); + *sub_y = stbtt__oversample_shift(prefilter_y); +} + +// rects array must be big enough to accommodate all characters in the given ranges +STBTT_DEF int stbtt_PackFontRangesRenderIntoRects(stbtt_pack_context *spc, const stbtt_fontinfo *info, stbtt_pack_range *ranges, int num_ranges, stbrp_rect *rects) +{ + int i,j,k, missing_glyph = -1, return_value = 1; + + // save current values + int old_h_over = spc->h_oversample; + int old_v_over = spc->v_oversample; + + k = 0; + for (i=0; i < num_ranges; ++i) { + float fh = ranges[i].font_size; + float scale = fh > 0 ? stbtt_ScaleForPixelHeight(info, fh) : stbtt_ScaleForMappingEmToPixels(info, -fh); + float recip_h,recip_v,sub_x,sub_y; + spc->h_oversample = ranges[i].h_oversample; + spc->v_oversample = ranges[i].v_oversample; + recip_h = 1.0f / spc->h_oversample; + recip_v = 1.0f / spc->v_oversample; + sub_x = stbtt__oversample_shift(spc->h_oversample); + sub_y = stbtt__oversample_shift(spc->v_oversample); + for (j=0; j < ranges[i].num_chars; ++j) { + stbrp_rect *r = &rects[k]; + if (r->was_packed && r->w != 0 && r->h != 0) { + stbtt_packedchar *bc = &ranges[i].chardata_for_range[j]; + int advance, lsb, x0,y0,x1,y1; + int codepoint = ranges[i].array_of_unicode_codepoints == NULL ? ranges[i].first_unicode_codepoint_in_range + j : ranges[i].array_of_unicode_codepoints[j]; + int glyph = stbtt_FindGlyphIndex(info, codepoint); + stbrp_coord pad = (stbrp_coord) spc->padding; + + // pad on left and top + r->x += pad; + r->y += pad; + r->w -= pad; + r->h -= pad; + stbtt_GetGlyphHMetrics(info, glyph, &advance, &lsb); + stbtt_GetGlyphBitmapBox(info, glyph, + scale * spc->h_oversample, + scale * spc->v_oversample, + &x0,&y0,&x1,&y1); + stbtt_MakeGlyphBitmapSubpixel(info, + spc->pixels + r->x + r->y*spc->stride_in_bytes, + r->w - spc->h_oversample+1, + r->h - spc->v_oversample+1, + spc->stride_in_bytes, + scale * spc->h_oversample, + scale * spc->v_oversample, + 0,0, + glyph); + + if (spc->h_oversample > 1) + stbtt__h_prefilter(spc->pixels + r->x + r->y*spc->stride_in_bytes, + r->w, r->h, spc->stride_in_bytes, + spc->h_oversample); + + if (spc->v_oversample > 1) + stbtt__v_prefilter(spc->pixels + r->x + r->y*spc->stride_in_bytes, + r->w, r->h, spc->stride_in_bytes, + spc->v_oversample); + + bc->x0 = (stbtt_int16) r->x; + bc->y0 = (stbtt_int16) r->y; + bc->x1 = (stbtt_int16) (r->x + r->w); + bc->y1 = (stbtt_int16) (r->y + r->h); + bc->xadvance = scale * advance; + bc->xoff = (float) x0 * recip_h + sub_x; + bc->yoff = (float) y0 * recip_v + sub_y; + bc->xoff2 = (x0 + r->w) * recip_h + sub_x; + bc->yoff2 = (y0 + r->h) * recip_v + sub_y; + + if (glyph == 0) + missing_glyph = j; + } else if (spc->skip_missing) { + return_value = 0; + } else if (r->was_packed && r->w == 0 && r->h == 0 && missing_glyph >= 0) { + ranges[i].chardata_for_range[j] = ranges[i].chardata_for_range[missing_glyph]; + } else { + return_value = 0; // if any fail, report failure + } + + ++k; + } + } + + // restore original values + spc->h_oversample = old_h_over; + spc->v_oversample = old_v_over; + + return return_value; +} + +STBTT_DEF void stbtt_PackFontRangesPackRects(stbtt_pack_context *spc, stbrp_rect *rects, int num_rects) +{ + stbrp_pack_rects((stbrp_context *) spc->pack_info, rects, num_rects); +} + +STBTT_DEF int stbtt_PackFontRanges(stbtt_pack_context *spc, const unsigned char *fontdata, int font_index, stbtt_pack_range *ranges, int num_ranges) +{ + stbtt_fontinfo info; + int i,j,n, return_value = 1; + //stbrp_context *context = (stbrp_context *) spc->pack_info; + stbrp_rect *rects; + + // flag all characters as NOT packed + for (i=0; i < num_ranges; ++i) + for (j=0; j < ranges[i].num_chars; ++j) + ranges[i].chardata_for_range[j].x0 = + ranges[i].chardata_for_range[j].y0 = + ranges[i].chardata_for_range[j].x1 = + ranges[i].chardata_for_range[j].y1 = 0; + + n = 0; + for (i=0; i < num_ranges; ++i) + n += ranges[i].num_chars; + + rects = (stbrp_rect *) STBTT_malloc(sizeof(*rects) * n, spc->user_allocator_context); + if (rects == NULL) + return 0; + + info.userdata = spc->user_allocator_context; + stbtt_InitFont(&info, fontdata, stbtt_GetFontOffsetForIndex(fontdata,font_index)); + + n = stbtt_PackFontRangesGatherRects(spc, &info, ranges, num_ranges, rects); + + stbtt_PackFontRangesPackRects(spc, rects, n); + + return_value = stbtt_PackFontRangesRenderIntoRects(spc, &info, ranges, num_ranges, rects); + + STBTT_free(rects, spc->user_allocator_context); + return return_value; +} + +STBTT_DEF int stbtt_PackFontRange(stbtt_pack_context *spc, const unsigned char *fontdata, int font_index, float font_size, + int first_unicode_codepoint_in_range, int num_chars_in_range, stbtt_packedchar *chardata_for_range) +{ + stbtt_pack_range range; + range.first_unicode_codepoint_in_range = first_unicode_codepoint_in_range; + range.array_of_unicode_codepoints = NULL; + range.num_chars = num_chars_in_range; + range.chardata_for_range = chardata_for_range; + range.font_size = font_size; + return stbtt_PackFontRanges(spc, fontdata, font_index, &range, 1); +} + +STBTT_DEF void stbtt_GetScaledFontVMetrics(const unsigned char *fontdata, int index, float size, float *ascent, float *descent, float *lineGap) +{ + int i_ascent, i_descent, i_lineGap; + float scale; + stbtt_fontinfo info; + stbtt_InitFont(&info, fontdata, stbtt_GetFontOffsetForIndex(fontdata, index)); + scale = size > 0 ? stbtt_ScaleForPixelHeight(&info, size) : stbtt_ScaleForMappingEmToPixels(&info, -size); + stbtt_GetFontVMetrics(&info, &i_ascent, &i_descent, &i_lineGap); + *ascent = (float) i_ascent * scale; + *descent = (float) i_descent * scale; + *lineGap = (float) i_lineGap * scale; +} + +STBTT_DEF void stbtt_GetPackedQuad(const stbtt_packedchar *chardata, int pw, int ph, int char_index, float *xpos, float *ypos, stbtt_aligned_quad *q, int align_to_integer) +{ + float ipw = 1.0f / pw, iph = 1.0f / ph; + const stbtt_packedchar *b = chardata + char_index; + + if (align_to_integer) { + float x = (float) STBTT_ifloor((*xpos + b->xoff) + 0.5f); + float y = (float) STBTT_ifloor((*ypos + b->yoff) + 0.5f); + q->x0 = x; + q->y0 = y; + q->x1 = x + b->xoff2 - b->xoff; + q->y1 = y + b->yoff2 - b->yoff; + } else { + q->x0 = *xpos + b->xoff; + q->y0 = *ypos + b->yoff; + q->x1 = *xpos + b->xoff2; + q->y1 = *ypos + b->yoff2; + } + + q->s0 = b->x0 * ipw; + q->t0 = b->y0 * iph; + q->s1 = b->x1 * ipw; + q->t1 = b->y1 * iph; + + *xpos += b->xadvance; +} + +////////////////////////////////////////////////////////////////////////////// +// +// sdf computation +// + +#define STBTT_min(a,b) ((a) < (b) ? (a) : (b)) +#define STBTT_max(a,b) ((a) < (b) ? (b) : (a)) + +static int stbtt__ray_intersect_bezier(float orig[2], float ray[2], float q0[2], float q1[2], float q2[2], float hits[2][2]) +{ + float q0perp = q0[1]*ray[0] - q0[0]*ray[1]; + float q1perp = q1[1]*ray[0] - q1[0]*ray[1]; + float q2perp = q2[1]*ray[0] - q2[0]*ray[1]; + float roperp = orig[1]*ray[0] - orig[0]*ray[1]; + + float a = q0perp - 2*q1perp + q2perp; + float b = q1perp - q0perp; + float c = q0perp - roperp; + + float s0 = 0., s1 = 0.; + int num_s = 0; + + if (a != 0.0) { + float discr = b*b - a*c; + if (discr > 0.0) { + float rcpna = -1 / a; + float d = (float) STBTT_sqrt(discr); + s0 = (b+d) * rcpna; + s1 = (b-d) * rcpna; + if (s0 >= 0.0 && s0 <= 1.0) + num_s = 1; + if (d > 0.0 && s1 >= 0.0 && s1 <= 1.0) { + if (num_s == 0) s0 = s1; + ++num_s; + } + } + } else { + // 2*b*s + c = 0 + // s = -c / (2*b) + s0 = c / (-2 * b); + if (s0 >= 0.0 && s0 <= 1.0) + num_s = 1; + } + + if (num_s == 0) + return 0; + else { + float rcp_len2 = 1 / (ray[0]*ray[0] + ray[1]*ray[1]); + float rayn_x = ray[0] * rcp_len2, rayn_y = ray[1] * rcp_len2; + + float q0d = q0[0]*rayn_x + q0[1]*rayn_y; + float q1d = q1[0]*rayn_x + q1[1]*rayn_y; + float q2d = q2[0]*rayn_x + q2[1]*rayn_y; + float rod = orig[0]*rayn_x + orig[1]*rayn_y; + + float q10d = q1d - q0d; + float q20d = q2d - q0d; + float q0rd = q0d - rod; + + hits[0][0] = q0rd + s0*(2.0f - 2.0f*s0)*q10d + s0*s0*q20d; + hits[0][1] = a*s0+b; + + if (num_s > 1) { + hits[1][0] = q0rd + s1*(2.0f - 2.0f*s1)*q10d + s1*s1*q20d; + hits[1][1] = a*s1+b; + return 2; + } else { + return 1; + } + } +} + +static int equal(float *a, float *b) +{ + return (a[0] == b[0] && a[1] == b[1]); +} + +static int stbtt__compute_crossings_x(float x, float y, int nverts, stbtt_vertex *verts) +{ + int i; + float orig[2], ray[2] = { 1, 0 }; + float y_frac; + int winding = 0; + + orig[0] = x; + orig[1] = y; + + // make sure y never passes through a vertex of the shape + y_frac = (float) STBTT_fmod(y, 1.0f); + if (y_frac < 0.01f) + y += 0.01f; + else if (y_frac > 0.99f) + y -= 0.01f; + orig[1] = y; + + // test a ray from (-infinity,y) to (x,y) + for (i=0; i < nverts; ++i) { + if (verts[i].type == STBTT_vline) { + int x0 = (int) verts[i-1].x, y0 = (int) verts[i-1].y; + int x1 = (int) verts[i ].x, y1 = (int) verts[i ].y; + if (y > STBTT_min(y0,y1) && y < STBTT_max(y0,y1) && x > STBTT_min(x0,x1)) { + float x_inter = (y - y0) / (y1 - y0) * (x1-x0) + x0; + if (x_inter < x) + winding += (y0 < y1) ? 1 : -1; + } + } + if (verts[i].type == STBTT_vcurve) { + int x0 = (int) verts[i-1].x , y0 = (int) verts[i-1].y ; + int x1 = (int) verts[i ].cx, y1 = (int) verts[i ].cy; + int x2 = (int) verts[i ].x , y2 = (int) verts[i ].y ; + int ax = STBTT_min(x0,STBTT_min(x1,x2)), ay = STBTT_min(y0,STBTT_min(y1,y2)); + int by = STBTT_max(y0,STBTT_max(y1,y2)); + if (y > ay && y < by && x > ax) { + float q0[2],q1[2],q2[2]; + float hits[2][2]; + q0[0] = (float)x0; + q0[1] = (float)y0; + q1[0] = (float)x1; + q1[1] = (float)y1; + q2[0] = (float)x2; + q2[1] = (float)y2; + if (equal(q0,q1) || equal(q1,q2)) { + x0 = (int)verts[i-1].x; + y0 = (int)verts[i-1].y; + x1 = (int)verts[i ].x; + y1 = (int)verts[i ].y; + if (y > STBTT_min(y0,y1) && y < STBTT_max(y0,y1) && x > STBTT_min(x0,x1)) { + float x_inter = (y - y0) / (y1 - y0) * (x1-x0) + x0; + if (x_inter < x) + winding += (y0 < y1) ? 1 : -1; + } + } else { + int num_hits = stbtt__ray_intersect_bezier(orig, ray, q0, q1, q2, hits); + if (num_hits >= 1) + if (hits[0][0] < 0) + winding += (hits[0][1] < 0 ? -1 : 1); + if (num_hits >= 2) + if (hits[1][0] < 0) + winding += (hits[1][1] < 0 ? -1 : 1); + } + } + } + } + return winding; +} + +static float stbtt__cuberoot( float x ) +{ + if (x<0) + return -(float) STBTT_pow(-x,1.0f/3.0f); + else + return (float) STBTT_pow( x,1.0f/3.0f); +} + +// x^3 + c*x^2 + b*x + a = 0 +static int stbtt__solve_cubic(float a, float b, float c, float* r) +{ + float s = -a / 3; + float p = b - a*a / 3; + float q = a * (2*a*a - 9*b) / 27 + c; + float p3 = p*p*p; + float d = q*q + 4*p3 / 27; + if (d >= 0) { + float z = (float) STBTT_sqrt(d); + float u = (-q + z) / 2; + float v = (-q - z) / 2; + u = stbtt__cuberoot(u); + v = stbtt__cuberoot(v); + r[0] = s + u + v; + return 1; + } else { + float u = (float) STBTT_sqrt(-p/3); + float v = (float) STBTT_acos(-STBTT_sqrt(-27/p3) * q / 2) / 3; // p3 must be negative, since d is negative + float m = (float) STBTT_cos(v); + float n = (float) STBTT_cos(v-3.141592/2)*1.732050808f; + r[0] = s + u * 2 * m; + r[1] = s - u * (m + n); + r[2] = s - u * (m - n); + + //STBTT_assert( STBTT_fabs(((r[0]+a)*r[0]+b)*r[0]+c) < 0.05f); // these asserts may not be safe at all scales, though they're in bezier t parameter units so maybe? + //STBTT_assert( STBTT_fabs(((r[1]+a)*r[1]+b)*r[1]+c) < 0.05f); + //STBTT_assert( STBTT_fabs(((r[2]+a)*r[2]+b)*r[2]+c) < 0.05f); + return 3; + } +} + +STBTT_DEF unsigned char * stbtt_GetGlyphSDF(const stbtt_fontinfo *info, float scale, int glyph, int padding, unsigned char onedge_value, float pixel_dist_scale, int *width, int *height, int *xoff, int *yoff) +{ + float scale_x = scale, scale_y = scale; + int ix0,iy0,ix1,iy1; + int w,h; + unsigned char *data; + + if (scale == 0) return NULL; + + stbtt_GetGlyphBitmapBoxSubpixel(info, glyph, scale, scale, 0.0f,0.0f, &ix0,&iy0,&ix1,&iy1); + + // if empty, return NULL + if (ix0 == ix1 || iy0 == iy1) + return NULL; + + ix0 -= padding; + iy0 -= padding; + ix1 += padding; + iy1 += padding; + + w = (ix1 - ix0); + h = (iy1 - iy0); + + if (width ) *width = w; + if (height) *height = h; + if (xoff ) *xoff = ix0; + if (yoff ) *yoff = iy0; + + // invert for y-downwards bitmaps + scale_y = -scale_y; + + { + int x,y,i,j; + float *precompute; + stbtt_vertex *verts; + int num_verts = stbtt_GetGlyphShape(info, glyph, &verts); + data = (unsigned char *) STBTT_malloc(w * h, info->userdata); + precompute = (float *) STBTT_malloc(num_verts * sizeof(float), info->userdata); + + for (i=0,j=num_verts-1; i < num_verts; j=i++) { + if (verts[i].type == STBTT_vline) { + float x0 = verts[i].x*scale_x, y0 = verts[i].y*scale_y; + float x1 = verts[j].x*scale_x, y1 = verts[j].y*scale_y; + float dist = (float) STBTT_sqrt((x1-x0)*(x1-x0) + (y1-y0)*(y1-y0)); + precompute[i] = (dist == 0) ? 0.0f : 1.0f / dist; + } else if (verts[i].type == STBTT_vcurve) { + float x2 = verts[j].x *scale_x, y2 = verts[j].y *scale_y; + float x1 = verts[i].cx*scale_x, y1 = verts[i].cy*scale_y; + float x0 = verts[i].x *scale_x, y0 = verts[i].y *scale_y; + float bx = x0 - 2*x1 + x2, by = y0 - 2*y1 + y2; + float len2 = bx*bx + by*by; + if (len2 != 0.0f) + precompute[i] = 1.0f / (bx*bx + by*by); + else + precompute[i] = 0.0f; + } else + precompute[i] = 0.0f; + } + + for (y=iy0; y < iy1; ++y) { + for (x=ix0; x < ix1; ++x) { + float val; + float min_dist = 999999.0f; + float sx = (float) x + 0.5f; + float sy = (float) y + 0.5f; + float x_gspace = (sx / scale_x); + float y_gspace = (sy / scale_y); + + int winding = stbtt__compute_crossings_x(x_gspace, y_gspace, num_verts, verts); // @OPTIMIZE: this could just be a rasterization, but needs to be line vs. non-tesselated curves so a new path + + for (i=0; i < num_verts; ++i) { + float x0 = verts[i].x*scale_x, y0 = verts[i].y*scale_y; + + // check against every point here rather than inside line/curve primitives -- @TODO: wrong if multiple 'moves' in a row produce a garbage point, and given culling, probably more efficient to do within line/curve + float dist2 = (x0-sx)*(x0-sx) + (y0-sy)*(y0-sy); + if (dist2 < min_dist*min_dist) + min_dist = (float) STBTT_sqrt(dist2); + + if (verts[i].type == STBTT_vline) { + float x1 = verts[i-1].x*scale_x, y1 = verts[i-1].y*scale_y; + + // coarse culling against bbox + //if (sx > STBTT_min(x0,x1)-min_dist && sx < STBTT_max(x0,x1)+min_dist && + // sy > STBTT_min(y0,y1)-min_dist && sy < STBTT_max(y0,y1)+min_dist) + float dist = (float) STBTT_fabs((x1-x0)*(y0-sy) - (y1-y0)*(x0-sx)) * precompute[i]; + STBTT_assert(i != 0); + if (dist < min_dist) { + // check position along line + // x' = x0 + t*(x1-x0), y' = y0 + t*(y1-y0) + // minimize (x'-sx)*(x'-sx)+(y'-sy)*(y'-sy) + float dx = x1-x0, dy = y1-y0; + float px = x0-sx, py = y0-sy; + // minimize (px+t*dx)^2 + (py+t*dy)^2 = px*px + 2*px*dx*t + t^2*dx*dx + py*py + 2*py*dy*t + t^2*dy*dy + // derivative: 2*px*dx + 2*py*dy + (2*dx*dx+2*dy*dy)*t, set to 0 and solve + float t = -(px*dx + py*dy) / (dx*dx + dy*dy); + if (t >= 0.0f && t <= 1.0f) + min_dist = dist; + } + } else if (verts[i].type == STBTT_vcurve) { + float x2 = verts[i-1].x *scale_x, y2 = verts[i-1].y *scale_y; + float x1 = verts[i ].cx*scale_x, y1 = verts[i ].cy*scale_y; + float box_x0 = STBTT_min(STBTT_min(x0,x1),x2); + float box_y0 = STBTT_min(STBTT_min(y0,y1),y2); + float box_x1 = STBTT_max(STBTT_max(x0,x1),x2); + float box_y1 = STBTT_max(STBTT_max(y0,y1),y2); + // coarse culling against bbox to avoid computing cubic unnecessarily + if (sx > box_x0-min_dist && sx < box_x1+min_dist && sy > box_y0-min_dist && sy < box_y1+min_dist) { + int num=0; + float ax = x1-x0, ay = y1-y0; + float bx = x0 - 2*x1 + x2, by = y0 - 2*y1 + y2; + float mx = x0 - sx, my = y0 - sy; + float res[3],px,py,t,it; + float a_inv = precompute[i]; + if (a_inv == 0.0) { // if a_inv is 0, it's 2nd degree so use quadratic formula + float a = 3*(ax*bx + ay*by); + float b = 2*(ax*ax + ay*ay) + (mx*bx+my*by); + float c = mx*ax+my*ay; + if (a == 0.0) { // if a is 0, it's linear + if (b != 0.0) { + res[num++] = -c/b; + } + } else { + float discriminant = b*b - 4*a*c; + if (discriminant < 0) + num = 0; + else { + float root = (float) STBTT_sqrt(discriminant); + res[0] = (-b - root)/(2*a); + res[1] = (-b + root)/(2*a); + num = 2; // don't bother distinguishing 1-solution case, as code below will still work + } + } + } else { + float b = 3*(ax*bx + ay*by) * a_inv; // could precompute this as it doesn't depend on sample point + float c = (2*(ax*ax + ay*ay) + (mx*bx+my*by)) * a_inv; + float d = (mx*ax+my*ay) * a_inv; + num = stbtt__solve_cubic(b, c, d, res); + } + if (num >= 1 && res[0] >= 0.0f && res[0] <= 1.0f) { + t = res[0], it = 1.0f - t; + px = it*it*x0 + 2*t*it*x1 + t*t*x2; + py = it*it*y0 + 2*t*it*y1 + t*t*y2; + dist2 = (px-sx)*(px-sx) + (py-sy)*(py-sy); + if (dist2 < min_dist * min_dist) + min_dist = (float) STBTT_sqrt(dist2); + } + if (num >= 2 && res[1] >= 0.0f && res[1] <= 1.0f) { + t = res[1], it = 1.0f - t; + px = it*it*x0 + 2*t*it*x1 + t*t*x2; + py = it*it*y0 + 2*t*it*y1 + t*t*y2; + dist2 = (px-sx)*(px-sx) + (py-sy)*(py-sy); + if (dist2 < min_dist * min_dist) + min_dist = (float) STBTT_sqrt(dist2); + } + if (num >= 3 && res[2] >= 0.0f && res[2] <= 1.0f) { + t = res[2], it = 1.0f - t; + px = it*it*x0 + 2*t*it*x1 + t*t*x2; + py = it*it*y0 + 2*t*it*y1 + t*t*y2; + dist2 = (px-sx)*(px-sx) + (py-sy)*(py-sy); + if (dist2 < min_dist * min_dist) + min_dist = (float) STBTT_sqrt(dist2); + } + } + } + } + if (winding == 0) + min_dist = -min_dist; // if outside the shape, value is negative + val = onedge_value + pixel_dist_scale * min_dist; + if (val < 0) + val = 0; + else if (val > 255) + val = 255; + data[(y-iy0)*w+(x-ix0)] = (unsigned char) val; + } + } + STBTT_free(precompute, info->userdata); + STBTT_free(verts, info->userdata); + } + return data; +} + +STBTT_DEF unsigned char * stbtt_GetCodepointSDF(const stbtt_fontinfo *info, float scale, int codepoint, int padding, unsigned char onedge_value, float pixel_dist_scale, int *width, int *height, int *xoff, int *yoff) +{ + return stbtt_GetGlyphSDF(info, scale, stbtt_FindGlyphIndex(info, codepoint), padding, onedge_value, pixel_dist_scale, width, height, xoff, yoff); +} + +STBTT_DEF void stbtt_FreeSDF(unsigned char *bitmap, void *userdata) +{ + STBTT_free(bitmap, userdata); +} + +////////////////////////////////////////////////////////////////////////////// +// +// font name matching -- recommended not to use this +// + +// check if a utf8 string contains a prefix which is the utf16 string; if so return length of matching utf8 string +static stbtt_int32 stbtt__CompareUTF8toUTF16_bigendian_prefix(stbtt_uint8 *s1, stbtt_int32 len1, stbtt_uint8 *s2, stbtt_int32 len2) +{ + stbtt_int32 i=0; + + // convert utf16 to utf8 and compare the results while converting + while (len2) { + stbtt_uint16 ch = s2[0]*256 + s2[1]; + if (ch < 0x80) { + if (i >= len1) return -1; + if (s1[i++] != ch) return -1; + } else if (ch < 0x800) { + if (i+1 >= len1) return -1; + if (s1[i++] != 0xc0 + (ch >> 6)) return -1; + if (s1[i++] != 0x80 + (ch & 0x3f)) return -1; + } else if (ch >= 0xd800 && ch < 0xdc00) { + stbtt_uint32 c; + stbtt_uint16 ch2 = s2[2]*256 + s2[3]; + if (i+3 >= len1) return -1; + c = ((ch - 0xd800) << 10) + (ch2 - 0xdc00) + 0x10000; + if (s1[i++] != 0xf0 + (c >> 18)) return -1; + if (s1[i++] != 0x80 + ((c >> 12) & 0x3f)) return -1; + if (s1[i++] != 0x80 + ((c >> 6) & 0x3f)) return -1; + if (s1[i++] != 0x80 + ((c ) & 0x3f)) return -1; + s2 += 2; // plus another 2 below + len2 -= 2; + } else if (ch >= 0xdc00 && ch < 0xe000) { + return -1; + } else { + if (i+2 >= len1) return -1; + if (s1[i++] != 0xe0 + (ch >> 12)) return -1; + if (s1[i++] != 0x80 + ((ch >> 6) & 0x3f)) return -1; + if (s1[i++] != 0x80 + ((ch ) & 0x3f)) return -1; + } + s2 += 2; + len2 -= 2; + } + return i; +} + +static int stbtt_CompareUTF8toUTF16_bigendian_internal(char *s1, int len1, char *s2, int len2) +{ + return len1 == stbtt__CompareUTF8toUTF16_bigendian_prefix((stbtt_uint8*) s1, len1, (stbtt_uint8*) s2, len2); +} + +// returns results in whatever encoding you request... but note that 2-byte encodings +// will be BIG-ENDIAN... use stbtt_CompareUTF8toUTF16_bigendian() to compare +STBTT_DEF const char *stbtt_GetFontNameString(const stbtt_fontinfo *font, int *length, int platformID, int encodingID, int languageID, int nameID) +{ + stbtt_int32 i,count,stringOffset; + stbtt_uint8 *fc = font->data; + stbtt_uint32 offset = font->fontstart; + stbtt_uint32 nm = stbtt__find_table(fc, offset, "name"); + if (!nm) return NULL; + + count = ttUSHORT(fc+nm+2); + stringOffset = nm + ttUSHORT(fc+nm+4); + for (i=0; i < count; ++i) { + stbtt_uint32 loc = nm + 6 + 12 * i; + if (platformID == ttUSHORT(fc+loc+0) && encodingID == ttUSHORT(fc+loc+2) + && languageID == ttUSHORT(fc+loc+4) && nameID == ttUSHORT(fc+loc+6)) { + *length = ttUSHORT(fc+loc+8); + return (const char *) (fc+stringOffset+ttUSHORT(fc+loc+10)); + } + } + return NULL; +} + +static int stbtt__matchpair(stbtt_uint8 *fc, stbtt_uint32 nm, stbtt_uint8 *name, stbtt_int32 nlen, stbtt_int32 target_id, stbtt_int32 next_id) +{ + stbtt_int32 i; + stbtt_int32 count = ttUSHORT(fc+nm+2); + stbtt_int32 stringOffset = nm + ttUSHORT(fc+nm+4); + + for (i=0; i < count; ++i) { + stbtt_uint32 loc = nm + 6 + 12 * i; + stbtt_int32 id = ttUSHORT(fc+loc+6); + if (id == target_id) { + // find the encoding + stbtt_int32 platform = ttUSHORT(fc+loc+0), encoding = ttUSHORT(fc+loc+2), language = ttUSHORT(fc+loc+4); + + // is this a Unicode encoding? + if (platform == 0 || (platform == 3 && encoding == 1) || (platform == 3 && encoding == 10)) { + stbtt_int32 slen = ttUSHORT(fc+loc+8); + stbtt_int32 off = ttUSHORT(fc+loc+10); + + // check if there's a prefix match + stbtt_int32 matchlen = stbtt__CompareUTF8toUTF16_bigendian_prefix(name, nlen, fc+stringOffset+off,slen); + if (matchlen >= 0) { + // check for target_id+1 immediately following, with same encoding & language + if (i+1 < count && ttUSHORT(fc+loc+12+6) == next_id && ttUSHORT(fc+loc+12) == platform && ttUSHORT(fc+loc+12+2) == encoding && ttUSHORT(fc+loc+12+4) == language) { + slen = ttUSHORT(fc+loc+12+8); + off = ttUSHORT(fc+loc+12+10); + if (slen == 0) { + if (matchlen == nlen) + return 1; + } else if (matchlen < nlen && name[matchlen] == ' ') { + ++matchlen; + if (stbtt_CompareUTF8toUTF16_bigendian_internal((char*) (name+matchlen), nlen-matchlen, (char*)(fc+stringOffset+off),slen)) + return 1; + } + } else { + // if nothing immediately following + if (matchlen == nlen) + return 1; + } + } + } + + // @TODO handle other encodings + } + } + return 0; +} + +static int stbtt__matches(stbtt_uint8 *fc, stbtt_uint32 offset, stbtt_uint8 *name, stbtt_int32 flags) +{ + stbtt_int32 nlen = (stbtt_int32) STBTT_strlen((char *) name); + stbtt_uint32 nm,hd; + if (!stbtt__isfont(fc+offset)) return 0; + + // check italics/bold/underline flags in macStyle... + if (flags) { + hd = stbtt__find_table(fc, offset, "head"); + if ((ttUSHORT(fc+hd+44) & 7) != (flags & 7)) return 0; + } + + nm = stbtt__find_table(fc, offset, "name"); + if (!nm) return 0; + + if (flags) { + // if we checked the macStyle flags, then just check the family and ignore the subfamily + if (stbtt__matchpair(fc, nm, name, nlen, 16, -1)) return 1; + if (stbtt__matchpair(fc, nm, name, nlen, 1, -1)) return 1; + if (stbtt__matchpair(fc, nm, name, nlen, 3, -1)) return 1; + } else { + if (stbtt__matchpair(fc, nm, name, nlen, 16, 17)) return 1; + if (stbtt__matchpair(fc, nm, name, nlen, 1, 2)) return 1; + if (stbtt__matchpair(fc, nm, name, nlen, 3, -1)) return 1; + } + + return 0; +} + +static int stbtt_FindMatchingFont_internal(unsigned char *font_collection, char *name_utf8, stbtt_int32 flags) +{ + stbtt_int32 i; + for (i=0;;++i) { + stbtt_int32 off = stbtt_GetFontOffsetForIndex(font_collection, i); + if (off < 0) return off; + if (stbtt__matches((stbtt_uint8 *) font_collection, off, (stbtt_uint8*) name_utf8, flags)) + return off; + } +} + +#if defined(__GNUC__) || defined(__clang__) +#pragma GCC diagnostic push +#pragma GCC diagnostic ignored "-Wcast-qual" +#endif + +STBTT_DEF int stbtt_BakeFontBitmap(const unsigned char *data, int offset, + float pixel_height, unsigned char *pixels, int pw, int ph, + int first_char, int num_chars, stbtt_bakedchar *chardata) +{ + return stbtt_BakeFontBitmap_internal((unsigned char *) data, offset, pixel_height, pixels, pw, ph, first_char, num_chars, chardata); +} + +STBTT_DEF int stbtt_GetFontOffsetForIndex(const unsigned char *data, int index) +{ + return stbtt_GetFontOffsetForIndex_internal((unsigned char *) data, index); +} + +STBTT_DEF int stbtt_GetNumberOfFonts(const unsigned char *data) +{ + return stbtt_GetNumberOfFonts_internal((unsigned char *) data); +} + +STBTT_DEF int stbtt_InitFont(stbtt_fontinfo *info, const unsigned char *data, int offset) +{ + return stbtt_InitFont_internal(info, (unsigned char *) data, offset); +} + +STBTT_DEF int stbtt_FindMatchingFont(const unsigned char *fontdata, const char *name, int flags) +{ + return stbtt_FindMatchingFont_internal((unsigned char *) fontdata, (char *) name, flags); +} + +STBTT_DEF int stbtt_CompareUTF8toUTF16_bigendian(const char *s1, int len1, const char *s2, int len2) +{ + return stbtt_CompareUTF8toUTF16_bigendian_internal((char *) s1, len1, (char *) s2, len2); +} + +#if defined(__GNUC__) || defined(__clang__) +#pragma GCC diagnostic pop +#endif + +#endif // STB_TRUETYPE_IMPLEMENTATION + + +// FULL VERSION HISTORY +// +// 1.19 (2018-02-11) OpenType GPOS kerning (horizontal only), STBTT_fmod +// 1.18 (2018-01-29) add missing function +// 1.17 (2017-07-23) make more arguments const; doc fix +// 1.16 (2017-07-12) SDF support +// 1.15 (2017-03-03) make more arguments const +// 1.14 (2017-01-16) num-fonts-in-TTC function +// 1.13 (2017-01-02) support OpenType fonts, certain Apple fonts +// 1.12 (2016-10-25) suppress warnings about casting away const with -Wcast-qual +// 1.11 (2016-04-02) fix unused-variable warning +// 1.10 (2016-04-02) allow user-defined fabs() replacement +// fix memory leak if fontsize=0.0 +// fix warning from duplicate typedef +// 1.09 (2016-01-16) warning fix; avoid crash on outofmem; use alloc userdata for PackFontRanges +// 1.08 (2015-09-13) document stbtt_Rasterize(); fixes for vertical & horizontal edges +// 1.07 (2015-08-01) allow PackFontRanges to accept arrays of sparse codepoints; +// allow PackFontRanges to pack and render in separate phases; +// fix stbtt_GetFontOFfsetForIndex (never worked for non-0 input?); +// fixed an assert() bug in the new rasterizer +// replace assert() with STBTT_assert() in new rasterizer +// 1.06 (2015-07-14) performance improvements (~35% faster on x86 and x64 on test machine) +// also more precise AA rasterizer, except if shapes overlap +// remove need for STBTT_sort +// 1.05 (2015-04-15) fix misplaced definitions for STBTT_STATIC +// 1.04 (2015-04-15) typo in example +// 1.03 (2015-04-12) STBTT_STATIC, fix memory leak in new packing, various fixes +// 1.02 (2014-12-10) fix various warnings & compile issues w/ stb_rect_pack, C++ +// 1.01 (2014-12-08) fix subpixel position when oversampling to exactly match +// non-oversampled; STBTT_POINT_SIZE for packed case only +// 1.00 (2014-12-06) add new PackBegin etc. API, w/ support for oversampling +// 0.99 (2014-09-18) fix multiple bugs with subpixel rendering (ryg) +// 0.9 (2014-08-07) support certain mac/iOS fonts without an MS platformID +// 0.8b (2014-07-07) fix a warning +// 0.8 (2014-05-25) fix a few more warnings +// 0.7 (2013-09-25) bugfix: subpixel glyph bug fixed in 0.5 had come back +// 0.6c (2012-07-24) improve documentation +// 0.6b (2012-07-20) fix a few more warnings +// 0.6 (2012-07-17) fix warnings; added stbtt_ScaleForMappingEmToPixels, +// stbtt_GetFontBoundingBox, stbtt_IsGlyphEmpty +// 0.5 (2011-12-09) bugfixes: +// subpixel glyph renderer computed wrong bounding box +// first vertex of shape can be off-curve (FreeSans) +// 0.4b (2011-12-03) fixed an error in the font baking example +// 0.4 (2011-12-01) kerning, subpixel rendering (tor) +// bugfixes for: +// codepoint-to-glyph conversion using table fmt=12 +// codepoint-to-glyph conversion using table fmt=4 +// stbtt_GetBakedQuad with non-square texture (Zer) +// updated Hello World! sample to use kerning and subpixel +// fixed some warnings +// 0.3 (2009-06-24) cmap fmt=12, compound shapes (MM) +// userdata, malloc-from-userdata, non-zero fill (stb) +// 0.2 (2009-03-11) Fix unsigned/signed char warnings +// 0.1 (2009-03-09) First public release +// + +/* +------------------------------------------------------------------------------ +This software is available under 2 licenses -- choose whichever you prefer. +------------------------------------------------------------------------------ +ALTERNATIVE A - MIT License +Copyright (c) 2017 Sean Barrett +Permission is hereby granted, free of charge, to any person obtaining a copy of +this software and associated documentation files (the "Software"), to deal in +the Software without restriction, including without limitation the rights to +use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies +of the Software, and to permit persons to whom the Software is furnished to do +so, subject to the following conditions: +The above copyright notice and this permission notice shall be included in all +copies or substantial portions of the Software. +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +SOFTWARE. +------------------------------------------------------------------------------ +ALTERNATIVE B - Public Domain (www.unlicense.org) +This is free and unencumbered software released into the public domain. +Anyone is free to copy, modify, publish, use, compile, sell, or distribute this +software, either in source code form or as a compiled binary, for any purpose, +commercial or non-commercial, and by any means. +In jurisdictions that recognize copyright laws, the author or authors of this +software dedicate any and all copyright interest in the software to the public +domain. We make this dedication for the benefit of the public at large and to +the detriment of our heirs and successors. We intend this dedication to be an +overt act of relinquishment in perpetuity of all present and future rights to +this software under copyright law. +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN +ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION +WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. +------------------------------------------------------------------------------ +*/ \ No newline at end of file diff --git a/troposphere/daybreak/nanovg/include/nanovg_dk.h b/troposphere/daybreak/nanovg/include/nanovg_dk.h new file mode 100644 index 000000000..a0669f5b4 --- /dev/null +++ b/troposphere/daybreak/nanovg/include/nanovg_dk.h @@ -0,0 +1,520 @@ +#pragma once + +#include +#include +#include +#include +#include + +#include "nanovg.h" +#include "nanovg/dk_renderer.hpp" + +#ifdef __cplusplus +extern "C" { +#endif + +static int dknvg__maxi(int a, int b) { return a > b ? a : b; } + +static const DKNVGtextureDescriptor* dknvg__findTexture(DKNVGcontext* dk, int id) { + return dk->renderer->GetTextureDescriptor(*dk, id); +} + +static int dknvg__renderCreate(void* uptr) +{ + DKNVGcontext *dk = (DKNVGcontext*)uptr; + return dk->renderer->Create(*dk); +} + +static int dknvg__renderCreateTexture(void* uptr, int type, int w, int h, int imageFlags, const unsigned char* data) +{ + DKNVGcontext *dk = (DKNVGcontext*)uptr; + return dk->renderer->CreateTexture(*dk, type, w, h, imageFlags, data); +} + +static int dknvg__renderDeleteTexture(void* uptr, int image) { + DKNVGcontext *dk = (DKNVGcontext*)uptr; + return dk->renderer->DeleteTexture(*dk, image); +} + +static int dknvg__renderUpdateTexture(void* uptr, int image, int x, int y, int w, int h, const unsigned char* data) { + DKNVGcontext *dk = (DKNVGcontext*)uptr; + return dk->renderer->UpdateTexture(*dk, image, x, y, w, h, data); +} + +static int dknvg__renderGetTextureSize(void* uptr, int image, int* w, int* h) { + DKNVGcontext *dk = (DKNVGcontext*)uptr; + return dk->renderer->GetTextureSize(*dk, image, w, h); +} + +static void dknvg__xformToMat3x4(float* m3, float* t) { + m3[0] = t[0]; + m3[1] = t[1]; + m3[2] = 0.0f; + m3[3] = 0.0f; + m3[4] = t[2]; + m3[5] = t[3]; + m3[6] = 0.0f; + m3[7] = 0.0f; + m3[8] = t[4]; + m3[9] = t[5]; + m3[10] = 1.0f; + m3[11] = 0.0f; +} + +static NVGcolor dknvg__premulColor(NVGcolor c) { + c.r *= c.a; + c.g *= c.a; + c.b *= c.a; + return c; +} + +static int dknvg__convertPaint(DKNVGcontext* dk, DKNVGfragUniforms* frag, NVGpaint* paint, + NVGscissor* scissor, float width, float fringe, float strokeThr) +{ + const DKNVGtextureDescriptor *tex = NULL; + float invxform[6]; + + memset(frag, 0, sizeof(*frag)); + + frag->innerCol = dknvg__premulColor(paint->innerColor); + frag->outerCol = dknvg__premulColor(paint->outerColor); + + if (scissor->extent[0] < -0.5f || scissor->extent[1] < -0.5f) { + memset(frag->scissorMat, 0, sizeof(frag->scissorMat)); + frag->scissorExt[0] = 1.0f; + frag->scissorExt[1] = 1.0f; + frag->scissorScale[0] = 1.0f; + frag->scissorScale[1] = 1.0f; + } else { + nvgTransformInverse(invxform, scissor->xform); + dknvg__xformToMat3x4(frag->scissorMat, invxform); + frag->scissorExt[0] = scissor->extent[0]; + frag->scissorExt[1] = scissor->extent[1]; + frag->scissorScale[0] = sqrtf(scissor->xform[0]*scissor->xform[0] + scissor->xform[2]*scissor->xform[2]) / fringe; + frag->scissorScale[1] = sqrtf(scissor->xform[1]*scissor->xform[1] + scissor->xform[3]*scissor->xform[3]) / fringe; + } + + memcpy(frag->extent, paint->extent, sizeof(frag->extent)); + frag->strokeMult = (width*0.5f + fringe*0.5f) / fringe; + frag->strokeThr = strokeThr; + + if (paint->image != 0) { + tex = dknvg__findTexture(dk, paint->image); + if (tex == NULL) return 0; + if ((tex->flags & NVG_IMAGE_FLIPY) != 0) { + float m1[6], m2[6]; + nvgTransformTranslate(m1, 0.0f, frag->extent[1] * 0.5f); + nvgTransformMultiply(m1, paint->xform); + nvgTransformScale(m2, 1.0f, -1.0f); + nvgTransformMultiply(m2, m1); + nvgTransformTranslate(m1, 0.0f, -frag->extent[1] * 0.5f); + nvgTransformMultiply(m1, m2); + nvgTransformInverse(invxform, m1); + } else { + nvgTransformInverse(invxform, paint->xform); + } + frag->type = NSVG_SHADER_FILLIMG; + + if (tex->type == NVG_TEXTURE_RGBA) + frag->texType = (tex->flags & NVG_IMAGE_PREMULTIPLIED) ? 0 : 1; + else + frag->texType = 2; +// printf("frag->texType = %d\n", frag->texType); + } else { + frag->type = NSVG_SHADER_FILLGRAD; + frag->radius = paint->radius; + frag->feather = paint->feather; + nvgTransformInverse(invxform, paint->xform); + } + + dknvg__xformToMat3x4(frag->paintMat, invxform); + + return 1; +} + +static DKNVGfragUniforms* nvg__fragUniformPtr(DKNVGcontext* dk, int i); + +static void dknvg__renderViewport(void* uptr, float width, float height, float devicePixelRatio) +{ + NVG_NOTUSED(devicePixelRatio); + DKNVGcontext* dk = (DKNVGcontext*)uptr; + dk->view[0] = width; + dk->view[1] = height; +} + +static void dknvg__renderCancel(void* uptr) { + DKNVGcontext* dk = (DKNVGcontext*)uptr; + dk->nverts = 0; + dk->npaths = 0; + dk->ncalls = 0; + dk->nuniforms = 0; +} + +static int dknvg_convertBlendFuncFactor(int factor) { + switch (factor) { + case NVG_ZERO: + return DkBlendFactor_Zero; + case NVG_ONE: + return DkBlendFactor_One; + case NVG_SRC_COLOR: + return DkBlendFactor_SrcColor; + case NVG_ONE_MINUS_SRC_COLOR: + return DkBlendFactor_InvSrcColor; + case NVG_DST_COLOR: + return DkBlendFactor_DstColor; + case NVG_ONE_MINUS_DST_COLOR: + return DkBlendFactor_InvDstColor; + case NVG_SRC_ALPHA: + return DkBlendFactor_SrcAlpha; + case NVG_ONE_MINUS_SRC_ALPHA: + return DkBlendFactor_InvSrcAlpha; + case NVG_DST_ALPHA: + return DkBlendFactor_DstAlpha; + case NVG_ONE_MINUS_DST_ALPHA: + return DkBlendFactor_InvDstAlpha; + case NVG_SRC_ALPHA_SATURATE: + return DkBlendFactor_SrcAlphaSaturate; + default: + return -1; + } +} + +static DKNVGblend dknvg__blendCompositeOperation(NVGcompositeOperationState op) { + DKNVGblend blend; + blend.srcRGB = dknvg_convertBlendFuncFactor(op.srcRGB); + blend.dstRGB = dknvg_convertBlendFuncFactor(op.dstRGB); + blend.srcAlpha = dknvg_convertBlendFuncFactor(op.srcAlpha); + blend.dstAlpha = dknvg_convertBlendFuncFactor(op.dstAlpha); + + if (blend.srcRGB == -1 || blend.dstRGB == -1 || blend.srcAlpha == -1 || blend.dstAlpha == -1) { + blend.srcRGB = DkBlendFactor_One; + blend.dstRGB = DkBlendFactor_InvSrcAlpha; + blend.srcAlpha = DkBlendFactor_One; + blend.dstAlpha = DkBlendFactor_InvSrcAlpha; + } + return blend; +} + +static void dknvg__renderFlush(void* uptr) { + DKNVGcontext *dk = (DKNVGcontext*)uptr; + dk->renderer->Flush(*dk); +} + +static int dknvg__maxVertCount(const NVGpath* paths, int npaths) { + int i, count = 0; + for (i = 0; i < npaths; i++) { + count += paths[i].nfill; + count += paths[i].nstroke; + } + return count; +} + +static DKNVGcall* dknvg__allocCall(DKNVGcontext* dk) +{ + DKNVGcall* ret = NULL; + if (dk->ncalls+1 > dk->ccalls) { + DKNVGcall* calls; + int ccalls = dknvg__maxi(dk->ncalls+1, 128) + dk->ccalls/2; // 1.5x Overallocate + calls = (DKNVGcall*)realloc(dk->calls, sizeof(DKNVGcall) * ccalls); + if (calls == NULL) return NULL; + dk->calls = calls; + dk->ccalls = ccalls; + } + ret = &dk->calls[dk->ncalls++]; + memset(ret, 0, sizeof(DKNVGcall)); + return ret; +} + +static int dknvg__allocPaths(DKNVGcontext* dk, int n) +{ + int ret = 0; + if (dk->npaths+n > dk->cpaths) { + DKNVGpath* paths; + int cpaths = dknvg__maxi(dk->npaths + n, 128) + dk->cpaths/2; // 1.5x Overallocate + paths = (DKNVGpath*)realloc(dk->paths, sizeof(DKNVGpath) * cpaths); + if (paths == NULL) return -1; + dk->paths = paths; + dk->cpaths = cpaths; + } + ret = dk->npaths; + dk->npaths += n; + return ret; +} + +static int dknvg__allocVerts(DKNVGcontext* dk, int n) +{ + int ret = 0; + if (dk->nverts+n > dk->cverts) { + NVGvertex* verts; + int cverts = dknvg__maxi(dk->nverts + n, 4096) + dk->cverts/2; // 1.5x Overallocate + verts = (NVGvertex*)realloc(dk->verts, sizeof(NVGvertex) * cverts); + if (verts == NULL) return -1; + dk->verts = verts; + dk->cverts = cverts; + } + ret = dk->nverts; + dk->nverts += n; + return ret; +} + +static int dknvg__allocFragUniforms(DKNVGcontext* dk, int n) +{ + int ret = 0, structSize = dk->fragSize; + if (dk->nuniforms+n > dk->cuniforms) { + unsigned char* uniforms; + int cuniforms = dknvg__maxi(dk->nuniforms+n, 128) + dk->cuniforms/2; // 1.5x Overallocate + uniforms = (unsigned char*)realloc(dk->uniforms, structSize * cuniforms); + if (uniforms == NULL) return -1; + dk->uniforms = uniforms; + dk->cuniforms = cuniforms; + } + ret = dk->nuniforms * structSize; + dk->nuniforms += n; + return ret; +} + +static DKNVGfragUniforms* nvg__fragUniformPtr(DKNVGcontext* dk, int i) +{ + return (DKNVGfragUniforms*)&dk->uniforms[i]; +} + +static void dknvg__vset(NVGvertex* vtx, float x, float y, float u, float v) +{ + vtx->x = x; + vtx->y = y; + vtx->u = u; + vtx->v = v; +} + +static void dknvg__renderFill(void* uptr, NVGpaint* paint, NVGcompositeOperationState compositeOperation, NVGscissor* scissor, float fringe, + const float* bounds, const NVGpath* paths, int npaths) +{ + DKNVGcontext* dk = (DKNVGcontext*)uptr; + DKNVGcall* call = dknvg__allocCall(dk); + NVGvertex* quad; + DKNVGfragUniforms* frag; + int i, maxverts, offset; + + if (call == NULL) return; + + call->type = DKNVG_FILL; + call->triangleCount = 4; + call->pathOffset = dknvg__allocPaths(dk, npaths); + if (call->pathOffset == -1) goto error; + call->pathCount = npaths; + call->image = paint->image; + call->blendFunc = dknvg__blendCompositeOperation(compositeOperation); + + if (npaths == 1 && paths[0].convex) + { + call->type = DKNVG_CONVEXFILL; + call->triangleCount = 0; // Bounding box fill quad not needed for convex fill + } + + // Allocate vertices for all the paths. + maxverts = dknvg__maxVertCount(paths, npaths) + call->triangleCount; + offset = dknvg__allocVerts(dk, maxverts); + if (offset == -1) goto error; + + for (i = 0; i < npaths; i++) { + DKNVGpath* copy = &dk->paths[call->pathOffset + i]; + const NVGpath* path = &paths[i]; + memset(copy, 0, sizeof(DKNVGpath)); + if (path->nfill > 0) { + copy->fillOffset = offset; + copy->fillCount = path->nfill; + memcpy(&dk->verts[offset], path->fill, sizeof(NVGvertex) * path->nfill); + offset += path->nfill; + } + if (path->nstroke > 0) { + copy->strokeOffset = offset; + copy->strokeCount = path->nstroke; + memcpy(&dk->verts[offset], path->stroke, sizeof(NVGvertex) * path->nstroke); + offset += path->nstroke; + } + } + + // Setup uniforms for draw calls + if (call->type == DKNVG_FILL) { + // Quad + call->triangleOffset = offset; + quad = &dk->verts[call->triangleOffset]; + dknvg__vset(&quad[0], bounds[2], bounds[3], 0.5f, 1.0f); + dknvg__vset(&quad[1], bounds[2], bounds[1], 0.5f, 1.0f); + dknvg__vset(&quad[2], bounds[0], bounds[3], 0.5f, 1.0f); + dknvg__vset(&quad[3], bounds[0], bounds[1], 0.5f, 1.0f); + + call->uniformOffset = dknvg__allocFragUniforms(dk, 2); + if (call->uniformOffset == -1) goto error; + // Simple shader for stencil + frag = nvg__fragUniformPtr(dk, call->uniformOffset); + memset(frag, 0, sizeof(*frag)); + frag->strokeThr = -1.0f; + frag->type = NSVG_SHADER_SIMPLE; + // Fill shader + dknvg__convertPaint(dk, nvg__fragUniformPtr(dk, call->uniformOffset + dk->fragSize), paint, scissor, fringe, fringe, -1.0f); + } else { + call->uniformOffset = dknvg__allocFragUniforms(dk, 1); + if (call->uniformOffset == -1) goto error; + // Fill shader + dknvg__convertPaint(dk, nvg__fragUniformPtr(dk, call->uniformOffset), paint, scissor, fringe, fringe, -1.0f); + } + + return; + +error: + // We get here if call alloc was ok, but something else is not. + // Roll back the last call to prevent drawing it. + if (dk->ncalls > 0) dk->ncalls--; +} + +static void dknvg__renderStroke(void* uptr, NVGpaint* paint, NVGcompositeOperationState compositeOperation, NVGscissor* scissor, float fringe, + float strokeWidth, const NVGpath* paths, int npaths) +{ + DKNVGcontext* dk = (DKNVGcontext*)uptr; + DKNVGcall* call = dknvg__allocCall(dk); + int i, maxverts, offset; + + if (call == NULL) { + return; + } + + call->type = DKNVG_STROKE; + call->pathOffset = dknvg__allocPaths(dk, npaths); + if (call->pathOffset == -1) goto error; + call->pathCount = npaths; + call->image = paint->image; + call->blendFunc = dknvg__blendCompositeOperation(compositeOperation); + + // Allocate vertices for all the paths. + maxverts = dknvg__maxVertCount(paths, npaths); + offset = dknvg__allocVerts(dk, maxverts); + if (offset == -1) goto error; + + for (i = 0; i < npaths; i++) { + DKNVGpath* copy = &dk->paths[call->pathOffset + i]; + const NVGpath* path = &paths[i]; + memset(copy, 0, sizeof(DKNVGpath)); + if (path->nstroke) { + copy->strokeOffset = offset; + copy->strokeCount = path->nstroke; + memcpy(&dk->verts[offset], path->stroke, sizeof(NVGvertex) * path->nstroke); + offset += path->nstroke; + } + } + + if (dk->flags & NVG_STENCIL_STROKES) { + // Fill shader + call->uniformOffset = dknvg__allocFragUniforms(dk, 2); + if (call->uniformOffset == -1) goto error; + + dknvg__convertPaint(dk, nvg__fragUniformPtr(dk, call->uniformOffset), paint, scissor, strokeWidth, fringe, -1.0f); + dknvg__convertPaint(dk, nvg__fragUniformPtr(dk, call->uniformOffset + dk->fragSize), paint, scissor, strokeWidth, fringe, 1.0f - 0.5f/255.0f); + } else { + // Fill shader + call->uniformOffset = dknvg__allocFragUniforms(dk, 1); + if (call->uniformOffset == -1) goto error; + + dknvg__convertPaint(dk, nvg__fragUniformPtr(dk, call->uniformOffset), paint, scissor, strokeWidth, fringe, -1.0f); + } + + return; + +error: + // We get here if call alloc was ok, but something else is not. + // Roll back the last call to prevent drawing it. + if (dk->ncalls > 0) dk->ncalls--; +} + +static void dknvg__renderTriangles(void* uptr, NVGpaint* paint, NVGcompositeOperationState compositeOperation, NVGscissor* scissor, + const NVGvertex* verts, int nverts, float fringe) +{ + DKNVGcontext* dk = (DKNVGcontext*)uptr; + DKNVGcall* call = dknvg__allocCall(dk); + DKNVGfragUniforms* frag; + + if (call == NULL) return; + + call->type = DKNVG_TRIANGLES; + call->image = paint->image; + call->blendFunc = dknvg__blendCompositeOperation(compositeOperation); + + // Allocate vertices for all the paths. + call->triangleOffset = dknvg__allocVerts(dk, nverts); + if (call->triangleOffset == -1) goto error; + call->triangleCount = nverts; + + memcpy(&dk->verts[call->triangleOffset], verts, sizeof(NVGvertex) * nverts); + + // Fill shader + call->uniformOffset = dknvg__allocFragUniforms(dk, 1); + if (call->uniformOffset == -1) goto error; + frag = nvg__fragUniformPtr(dk, call->uniformOffset); + dknvg__convertPaint(dk, frag, paint, scissor, 1.0f, fringe, -1.0f); + frag->type = NSVG_SHADER_IMG; + + return; + +error: + // We get here if call alloc was ok, but something else is not. + // Roll back the last call to prevent drawing it. + if (dk->ncalls > 0) dk->ncalls--; +} + +static void dknvg__renderDelete(void* uptr) { + DKNVGcontext* dk = (DKNVGcontext*)uptr; + if (dk == NULL) return; + + free(dk->paths); + free(dk->verts); + free(dk->uniforms); + free(dk->calls); + + free(dk); +} + +NVGcontext* nvgCreateDk(nvg::DkRenderer *renderer, int flags) { + NVGparams params; + NVGcontext* ctx = NULL; + DKNVGcontext* dk = (DKNVGcontext*)malloc(sizeof(DKNVGcontext)); + if (dk == NULL) goto error; + memset(dk, 0, sizeof(DKNVGcontext)); + + memset(¶ms, 0, sizeof(params)); + params.renderCreate = dknvg__renderCreate; + params.renderCreateTexture = dknvg__renderCreateTexture; + params.renderDeleteTexture = dknvg__renderDeleteTexture; + params.renderUpdateTexture = dknvg__renderUpdateTexture; + params.renderGetTextureSize = dknvg__renderGetTextureSize; + params.renderViewport = dknvg__renderViewport; + params.renderCancel = dknvg__renderCancel; + params.renderFlush = dknvg__renderFlush; + params.renderFill = dknvg__renderFill; + params.renderStroke = dknvg__renderStroke; + params.renderTriangles = dknvg__renderTriangles; + params.renderDelete = dknvg__renderDelete; + params.userPtr = dk; + params.edgeAntiAlias = flags & NVG_ANTIALIAS ? 1 : 0; + + dk->renderer = renderer; + dk->flags = flags; + + ctx = nvgCreateInternal(¶ms); + if (ctx == NULL) goto error; + + return ctx; + +error: + // 'dk' is freed by nvgDeleteInternal. + if (ctx != NULL) nvgDeleteInternal(ctx); + return NULL; +} + +void nvgDeleteDk(NVGcontext* ctx) +{ + nvgDeleteInternal(ctx); +} + +#ifdef __cplusplus +} +#endif \ No newline at end of file diff --git a/troposphere/daybreak/nanovg/include/nanovg_gl.h b/troposphere/daybreak/nanovg/include/nanovg_gl.h new file mode 100644 index 000000000..69506e7bf --- /dev/null +++ b/troposphere/daybreak/nanovg/include/nanovg_gl.h @@ -0,0 +1,1672 @@ +// +// Copyright (c) 2009-2013 Mikko Mononen memon@inside.org +// +// This software is provided 'as-is', without any express or implied +// warranty. In no event will the authors be held liable for any damages +// arising from the use of this software. +// Permission is granted to anyone to use this software for any purpose, +// including commercial applications, and to alter it and redistribute it +// freely, subject to the following restrictions: +// 1. The origin of this software must not be misrepresented; you must not +// claim that you wrote the original software. If you use this software +// in a product, an acknowledgment in the product documentation would be +// appreciated but is not required. +// 2. Altered source versions must be plainly marked as such, and must not be +// misrepresented as being the original software. +// 3. This notice may not be removed or altered from any source distribution. +// + +#ifndef NANOVG_GL_H +#define NANOVG_GL_H + +#ifdef USE_OPENGL + +#ifdef __cplusplus +extern "C" { +#endif + +// Create flags + +enum NVGcreateFlags { + // Flag indicating if geometry based anti-aliasing is used (may not be needed when using MSAA). + NVG_ANTIALIAS = 1<<0, + // Flag indicating if strokes should be drawn using stencil buffer. The rendering will be a little + // slower, but path overlaps (i.e. self-intersecting or sharp turns) will be drawn just once. + NVG_STENCIL_STROKES = 1<<1, + // Flag indicating that additional debug checks are done. + NVG_DEBUG = 1<<2, +}; + +#if defined NANOVG_GL2_IMPLEMENTATION +# define NANOVG_GL2 1 +# define NANOVG_GL_IMPLEMENTATION 1 +#elif defined NANOVG_GL3_IMPLEMENTATION +# define NANOVG_GL3 1 +# define NANOVG_GL_IMPLEMENTATION 1 +# define NANOVG_GL_USE_UNIFORMBUFFER 1 +#elif defined NANOVG_GLES2_IMPLEMENTATION +# define NANOVG_GLES2 1 +# define NANOVG_GL_IMPLEMENTATION 1 +#elif defined NANOVG_GLES3_IMPLEMENTATION +# define NANOVG_GLES3 1 +# define NANOVG_GL_IMPLEMENTATION 1 +#endif + +#define NANOVG_GL_USE_STATE_FILTER (1) + +// Creates NanoVG contexts for different OpenGL (ES) versions. +// Flags should be combination of the create flags above. + +#if defined NANOVG_GL2 + +NVGcontext* nvgCreateGL2(int flags); +void nvgDeleteGL2(NVGcontext* ctx); + +int nvglCreateImageFromHandleGL2(NVGcontext* ctx, GLuint textureId, int w, int h, int flags); +GLuint nvglImageHandleGL2(NVGcontext* ctx, int image); + +#endif + +#if defined NANOVG_GL3 + +NVGcontext* nvgCreateGL3(int flags); +void nvgDeleteGL3(NVGcontext* ctx); + +int nvglCreateImageFromHandleGL3(NVGcontext* ctx, GLuint textureId, int w, int h, int flags); +GLuint nvglImageHandleGL3(NVGcontext* ctx, int image); + +#endif + +#if defined NANOVG_GLES2 + +NVGcontext* nvgCreateGLES2(int flags); +void nvgDeleteGLES2(NVGcontext* ctx); + +int nvglCreateImageFromHandleGLES2(NVGcontext* ctx, GLuint textureId, int w, int h, int flags); +GLuint nvglImageHandleGLES2(NVGcontext* ctx, int image); + +#endif + +#if defined NANOVG_GLES3 + +NVGcontext* nvgCreateGLES3(int flags); +void nvgDeleteGLES3(NVGcontext* ctx); + +int nvglCreateImageFromHandleGLES3(NVGcontext* ctx, GLuint textureId, int w, int h, int flags); +GLuint nvglImageHandleGLES3(NVGcontext* ctx, int image); + +#endif + +// These are additional flags on top of NVGimageFlags. +enum NVGimageFlagsGL { + NVG_IMAGE_NODELETE = 1<<16, // Do not delete GL texture handle. +}; + +#ifdef __cplusplus +} +#endif + +#endif /* NANOVG_GL_H */ + +#ifdef NANOVG_GL_IMPLEMENTATION + +#include +#include +#include +#include +#include "nanovg.h" + +enum GLNVGuniformLoc { + GLNVG_LOC_VIEWSIZE, + GLNVG_LOC_TEX, + GLNVG_LOC_FRAG, + GLNVG_MAX_LOCS +}; + +enum GLNVGshaderType { + NSVG_SHADER_FILLGRAD, + NSVG_SHADER_FILLIMG, + NSVG_SHADER_SIMPLE, + NSVG_SHADER_IMG +}; + +#if NANOVG_GL_USE_UNIFORMBUFFER +enum GLNVGuniformBindings { + GLNVG_FRAG_BINDING = 0, +}; +#endif + +struct GLNVGshader { + GLuint prog; + GLuint frag; + GLuint vert; + GLint loc[GLNVG_MAX_LOCS]; +}; +typedef struct GLNVGshader GLNVGshader; + +struct GLNVGtexture { + int id; + GLuint tex; + int width, height; + int type; + int flags; +}; +typedef struct GLNVGtexture GLNVGtexture; + +struct GLNVGblend +{ + GLenum srcRGB; + GLenum dstRGB; + GLenum srcAlpha; + GLenum dstAlpha; +}; +typedef struct GLNVGblend GLNVGblend; + +enum GLNVGcallType { + GLNVG_NONE = 0, + GLNVG_FILL, + GLNVG_CONVEXFILL, + GLNVG_STROKE, + GLNVG_TRIANGLES, +}; + +struct GLNVGcall { + int type; + int image; + int pathOffset; + int pathCount; + int triangleOffset; + int triangleCount; + int uniformOffset; + GLNVGblend blendFunc; +}; +typedef struct GLNVGcall GLNVGcall; + +struct GLNVGpath { + int fillOffset; + int fillCount; + int strokeOffset; + int strokeCount; +}; +typedef struct GLNVGpath GLNVGpath; + +struct GLNVGfragUniforms { + #if NANOVG_GL_USE_UNIFORMBUFFER + float scissorMat[12]; // matrices are actually 3 vec4s + float paintMat[12]; + struct NVGcolor innerCol; + struct NVGcolor outerCol; + float scissorExt[2]; + float scissorScale[2]; + float extent[2]; + float radius; + float feather; + float strokeMult; + float strokeThr; + int texType; + int type; + #else + // note: after modifying layout or size of uniform array, + // don't forget to also update the fragment shader source! + #define NANOVG_GL_UNIFORMARRAY_SIZE 11 + union { + struct { + float scissorMat[12]; // matrices are actually 3 vec4s + float paintMat[12]; + struct NVGcolor innerCol; + struct NVGcolor outerCol; + float scissorExt[2]; + float scissorScale[2]; + float extent[2]; + float radius; + float feather; + float strokeMult; + float strokeThr; + float texType; + float type; + }; + float uniformArray[NANOVG_GL_UNIFORMARRAY_SIZE][4]; + }; + #endif +}; +typedef struct GLNVGfragUniforms GLNVGfragUniforms; + +struct GLNVGcontext { + GLNVGshader shader; + GLNVGtexture* textures; + float view[2]; + int ntextures; + int ctextures; + int textureId; + GLuint vertBuf; +#if defined NANOVG_GL3 + GLuint vertArr; +#endif +#if NANOVG_GL_USE_UNIFORMBUFFER + GLuint fragBuf; +#endif + int fragSize; + int flags; + + // Per frame buffers + GLNVGcall* calls; + int ccalls; + int ncalls; + GLNVGpath* paths; + int cpaths; + int npaths; + struct NVGvertex* verts; + int cverts; + int nverts; + unsigned char* uniforms; + int cuniforms; + int nuniforms; + + // cached state + #if NANOVG_GL_USE_STATE_FILTER + GLuint boundTexture; + GLuint stencilMask; + GLenum stencilFunc; + GLint stencilFuncRef; + GLuint stencilFuncMask; + GLNVGblend blendFunc; + #endif + + int dummyTex; +}; +typedef struct GLNVGcontext GLNVGcontext; + +static int glnvg__maxi(int a, int b) { return a > b ? a : b; } + +#ifdef NANOVG_GLES2 +static unsigned int glnvg__nearestPow2(unsigned int num) +{ + unsigned n = num > 0 ? num - 1 : 0; + n |= n >> 1; + n |= n >> 2; + n |= n >> 4; + n |= n >> 8; + n |= n >> 16; + n++; + return n; +} +#endif + +static void glnvg__bindTexture(GLNVGcontext* gl, GLuint tex) +{ +#if NANOVG_GL_USE_STATE_FILTER + if (gl->boundTexture != tex) { + gl->boundTexture = tex; + glBindTexture(GL_TEXTURE_2D, tex); + } +#else + glBindTexture(GL_TEXTURE_2D, tex); +#endif +} + +static void glnvg__stencilMask(GLNVGcontext* gl, GLuint mask) +{ +#if NANOVG_GL_USE_STATE_FILTER + if (gl->stencilMask != mask) { + gl->stencilMask = mask; + glStencilMask(mask); + } +#else + glStencilMask(mask); +#endif +} + +static void glnvg__stencilFunc(GLNVGcontext* gl, GLenum func, GLint ref, GLuint mask) +{ +#if NANOVG_GL_USE_STATE_FILTER + if ((gl->stencilFunc != func) || + (gl->stencilFuncRef != ref) || + (gl->stencilFuncMask != mask)) { + + gl->stencilFunc = func; + gl->stencilFuncRef = ref; + gl->stencilFuncMask = mask; + glStencilFunc(func, ref, mask); + } +#else + glStencilFunc(func, ref, mask); +#endif +} +static void glnvg__blendFuncSeparate(GLNVGcontext* gl, const GLNVGblend* blend) +{ +#if NANOVG_GL_USE_STATE_FILTER + if ((gl->blendFunc.srcRGB != blend->srcRGB) || + (gl->blendFunc.dstRGB != blend->dstRGB) || + (gl->blendFunc.srcAlpha != blend->srcAlpha) || + (gl->blendFunc.dstAlpha != blend->dstAlpha)) { + + gl->blendFunc = *blend; + glBlendFuncSeparate(blend->srcRGB, blend->dstRGB, blend->srcAlpha,blend->dstAlpha); + } +#else + glBlendFuncSeparate(blend->srcRGB, blend->dstRGB, blend->srcAlpha,blend->dstAlpha); +#endif +} + +static GLNVGtexture* glnvg__allocTexture(GLNVGcontext* gl) +{ + GLNVGtexture* tex = NULL; + int i; + + for (i = 0; i < gl->ntextures; i++) { + if (gl->textures[i].id == 0) { + tex = &gl->textures[i]; + break; + } + } + if (tex == NULL) { + if (gl->ntextures+1 > gl->ctextures) { + GLNVGtexture* textures; + int ctextures = glnvg__maxi(gl->ntextures+1, 4) + gl->ctextures/2; // 1.5x Overallocate + textures = (GLNVGtexture*)realloc(gl->textures, sizeof(GLNVGtexture)*ctextures); + if (textures == NULL) return NULL; + gl->textures = textures; + gl->ctextures = ctextures; + } + tex = &gl->textures[gl->ntextures++]; + } + + memset(tex, 0, sizeof(*tex)); + tex->id = ++gl->textureId; + + return tex; +} + +static GLNVGtexture* glnvg__findTexture(GLNVGcontext* gl, int id) +{ + int i; + for (i = 0; i < gl->ntextures; i++) + if (gl->textures[i].id == id) + return &gl->textures[i]; + return NULL; +} + +static int glnvg__deleteTexture(GLNVGcontext* gl, int id) +{ + int i; + for (i = 0; i < gl->ntextures; i++) { + if (gl->textures[i].id == id) { + if (gl->textures[i].tex != 0 && (gl->textures[i].flags & NVG_IMAGE_NODELETE) == 0) + glDeleteTextures(1, &gl->textures[i].tex); + memset(&gl->textures[i], 0, sizeof(gl->textures[i])); + return 1; + } + } + return 0; +} + +static void glnvg__dumpShaderError(GLuint shader, const char* name, const char* type) +{ + GLchar str[512+1]; + GLsizei len = 0; + glGetShaderInfoLog(shader, 512, &len, str); + if (len > 512) len = 512; + str[len] = '\0'; + printf("Shader %s/%s error:\n%s\n", name, type, str); +} + +static void glnvg__dumpProgramError(GLuint prog, const char* name) +{ + GLchar str[512+1]; + GLsizei len = 0; + glGetProgramInfoLog(prog, 512, &len, str); + if (len > 512) len = 512; + str[len] = '\0'; + printf("Program %s error:\n%s\n", name, str); +} + +static void glnvg__checkError(GLNVGcontext* gl, const char* str) +{ + GLenum err; + if ((gl->flags & NVG_DEBUG) == 0) return; + err = glGetError(); + if (err != GL_NO_ERROR) { + printf("Error %08x after %s\n", err, str); + return; + } +} + +static int glnvg__createShader(GLNVGshader* shader, const char* name, const char* header, const char* opts, const char* vshader, const char* fshader) +{ + GLint status; + GLuint prog, vert, frag; + const char* str[3]; + str[0] = header; + str[1] = opts != NULL ? opts : ""; + + memset(shader, 0, sizeof(*shader)); + + prog = glCreateProgram(); + vert = glCreateShader(GL_VERTEX_SHADER); + frag = glCreateShader(GL_FRAGMENT_SHADER); + str[2] = vshader; + glShaderSource(vert, 3, str, 0); + str[2] = fshader; + glShaderSource(frag, 3, str, 0); + + glCompileShader(vert); + glGetShaderiv(vert, GL_COMPILE_STATUS, &status); + if (status != GL_TRUE) { + glnvg__dumpShaderError(vert, name, "vert"); + return 0; + } + + glCompileShader(frag); + glGetShaderiv(frag, GL_COMPILE_STATUS, &status); + if (status != GL_TRUE) { + glnvg__dumpShaderError(frag, name, "frag"); + return 0; + } + + glAttachShader(prog, vert); + glAttachShader(prog, frag); + + glBindAttribLocation(prog, 0, "vertex"); + glBindAttribLocation(prog, 1, "tcoord"); + + glLinkProgram(prog); + glGetProgramiv(prog, GL_LINK_STATUS, &status); + if (status != GL_TRUE) { + glnvg__dumpProgramError(prog, name); + return 0; + } + + shader->prog = prog; + shader->vert = vert; + shader->frag = frag; + + return 1; +} + +static void glnvg__deleteShader(GLNVGshader* shader) +{ + if (shader->prog != 0) + glDeleteProgram(shader->prog); + if (shader->vert != 0) + glDeleteShader(shader->vert); + if (shader->frag != 0) + glDeleteShader(shader->frag); +} + +static void glnvg__getUniforms(GLNVGshader* shader) +{ + shader->loc[GLNVG_LOC_VIEWSIZE] = glGetUniformLocation(shader->prog, "viewSize"); + shader->loc[GLNVG_LOC_TEX] = glGetUniformLocation(shader->prog, "tex"); + +#if NANOVG_GL_USE_UNIFORMBUFFER + shader->loc[GLNVG_LOC_FRAG] = glGetUniformBlockIndex(shader->prog, "frag"); +#else + shader->loc[GLNVG_LOC_FRAG] = glGetUniformLocation(shader->prog, "frag"); +#endif +} + +static int glnvg__renderCreateTexture(void* uptr, int type, int w, int h, int imageFlags, const unsigned char* data); + +static int glnvg__renderCreate(void* uptr) +{ + GLNVGcontext* gl = (GLNVGcontext*)uptr; + int align = 4; + + // TODO: mediump float may not be enough for GLES2 in iOS. + // see the following discussion: https://github.com/memononen/nanovg/issues/46 + static const char* shaderHeader = +#if defined NANOVG_GL2 + "#define NANOVG_GL2 1\n" +#elif defined NANOVG_GL3 + "#version 150 core\n" + "#define NANOVG_GL3 1\n" +#elif defined NANOVG_GLES2 + "#version 100\n" + "#define NANOVG_GL2 1\n" +#elif defined NANOVG_GLES3 + "#version 300 es\n" + "#define NANOVG_GL3 1\n" +#endif + +#if NANOVG_GL_USE_UNIFORMBUFFER + "#define USE_UNIFORMBUFFER 1\n" +#else + "#define UNIFORMARRAY_SIZE 11\n" +#endif + "\n"; + + static const char* fillVertShader = + "#ifdef NANOVG_GL3\n" + " uniform vec2 viewSize;\n" + " in vec2 vertex;\n" + " in vec2 tcoord;\n" + " out vec2 ftcoord;\n" + " out vec2 fpos;\n" + "#else\n" + " uniform vec2 viewSize;\n" + " attribute vec2 vertex;\n" + " attribute vec2 tcoord;\n" + " varying vec2 ftcoord;\n" + " varying vec2 fpos;\n" + "#endif\n" + "void main(void) {\n" + " ftcoord = tcoord;\n" + " fpos = vertex;\n" + " gl_Position = vec4(2.0*vertex.x/viewSize.x - 1.0, 1.0 - 2.0*vertex.y/viewSize.y, 0, 1);\n" + "}\n"; + + static const char* fillFragShader = + "#ifdef GL_ES\n" + "#if defined(GL_FRAGMENT_PRECISION_HIGH) || defined(NANOVG_GL3)\n" + " precision highp float;\n" + "#else\n" + " precision mediump float;\n" + "#endif\n" + "#endif\n" + "#ifdef NANOVG_GL3\n" + "#ifdef USE_UNIFORMBUFFER\n" + " layout(std140) uniform frag {\n" + " mat3 scissorMat;\n" + " mat3 paintMat;\n" + " vec4 innerCol;\n" + " vec4 outerCol;\n" + " vec2 scissorExt;\n" + " vec2 scissorScale;\n" + " vec2 extent;\n" + " float radius;\n" + " float feather;\n" + " float strokeMult;\n" + " float strokeThr;\n" + " int texType;\n" + " int type;\n" + " };\n" + "#else\n" // NANOVG_GL3 && !USE_UNIFORMBUFFER + " uniform vec4 frag[UNIFORMARRAY_SIZE];\n" + "#endif\n" + " uniform sampler2D tex;\n" + " in vec2 ftcoord;\n" + " in vec2 fpos;\n" + " out vec4 outColor;\n" + "#else\n" // !NANOVG_GL3 + " uniform vec4 frag[UNIFORMARRAY_SIZE];\n" + " uniform sampler2D tex;\n" + " varying vec2 ftcoord;\n" + " varying vec2 fpos;\n" + "#endif\n" + "#ifndef USE_UNIFORMBUFFER\n" + " #define scissorMat mat3(frag[0].xyz, frag[1].xyz, frag[2].xyz)\n" + " #define paintMat mat3(frag[3].xyz, frag[4].xyz, frag[5].xyz)\n" + " #define innerCol frag[6]\n" + " #define outerCol frag[7]\n" + " #define scissorExt frag[8].xy\n" + " #define scissorScale frag[8].zw\n" + " #define extent frag[9].xy\n" + " #define radius frag[9].z\n" + " #define feather frag[9].w\n" + " #define strokeMult frag[10].x\n" + " #define strokeThr frag[10].y\n" + " #define texType int(frag[10].z)\n" + " #define type int(frag[10].w)\n" + "#endif\n" + "\n" + "float sdroundrect(vec2 pt, vec2 ext, float rad) {\n" + " vec2 ext2 = ext - vec2(rad,rad);\n" + " vec2 d = abs(pt) - ext2;\n" + " return min(max(d.x,d.y),0.0) + length(max(d,0.0)) - rad;\n" + "}\n" + "\n" + "// Scissoring\n" + "float scissorMask(vec2 p) {\n" + " vec2 sc = (abs((scissorMat * vec3(p,1.0)).xy) - scissorExt);\n" + " sc = vec2(0.5,0.5) - sc * scissorScale;\n" + " return clamp(sc.x,0.0,1.0) * clamp(sc.y,0.0,1.0);\n" + "}\n" + "#ifdef EDGE_AA\n" + "// Stroke - from [0..1] to clipped pyramid, where the slope is 1px.\n" + "float strokeMask() {\n" + " return min(1.0, (1.0-abs(ftcoord.x*2.0-1.0))*strokeMult) * min(1.0, ftcoord.y);\n" + "}\n" + "#endif\n" + "\n" + "void main(void) {\n" + " vec4 result;\n" + " float scissor = scissorMask(fpos);\n" + "#ifdef EDGE_AA\n" + " float strokeAlpha = strokeMask();\n" + " if (strokeAlpha < strokeThr) discard;\n" + "#else\n" + " float strokeAlpha = 1.0;\n" + "#endif\n" + " if (type == 0) { // Gradient\n" + " // Calculate gradient color using box gradient\n" + " vec2 pt = (paintMat * vec3(fpos,1.0)).xy;\n" + " float d = clamp((sdroundrect(pt, extent, radius) + feather*0.5) / feather, 0.0, 1.0);\n" + " vec4 color = mix(innerCol,outerCol,d);\n" + " // Combine alpha\n" + " color *= strokeAlpha * scissor;\n" + " result = color;\n" + " } else if (type == 1) { // Image\n" + " // Calculate color fron texture\n" + " vec2 pt = (paintMat * vec3(fpos,1.0)).xy / extent;\n" + "#ifdef NANOVG_GL3\n" + " vec4 color = texture(tex, pt);\n" + "#else\n" + " vec4 color = texture2D(tex, pt);\n" + "#endif\n" + " if (texType == 1) color = vec4(color.xyz*color.w,color.w);" + " if (texType == 2) color = vec4(color.x);" + " // Apply color tint and alpha.\n" + " color *= innerCol;\n" + " // Combine alpha\n" + " color *= strokeAlpha * scissor;\n" + " result = color;\n" + " } else if (type == 2) { // Stencil fill\n" + " result = vec4(1,1,1,1);\n" + " } else if (type == 3) { // Textured tris\n" + "#ifdef NANOVG_GL3\n" + " vec4 color = texture(tex, ftcoord);\n" + "#else\n" + " vec4 color = texture2D(tex, ftcoord);\n" + "#endif\n" + " if (texType == 1) color = vec4(color.xyz*color.w,color.w);" + " if (texType == 2) color = vec4(color.x);" + " color *= scissor;\n" + " result = color * innerCol;\n" + " }\n" + "#ifdef NANOVG_GL3\n" + " outColor = result;\n" + "#else\n" + " gl_FragColor = result;\n" + "#endif\n" + "}\n"; + + glnvg__checkError(gl, "init"); + + if (gl->flags & NVG_ANTIALIAS) { + if (glnvg__createShader(&gl->shader, "shader", shaderHeader, "#define EDGE_AA 1\n", fillVertShader, fillFragShader) == 0) + return 0; + } else { + if (glnvg__createShader(&gl->shader, "shader", shaderHeader, NULL, fillVertShader, fillFragShader) == 0) + return 0; + } + + glnvg__checkError(gl, "uniform locations"); + glnvg__getUniforms(&gl->shader); + + // Create dynamic vertex array +#if defined NANOVG_GL3 + glGenVertexArrays(1, &gl->vertArr); +#endif + glGenBuffers(1, &gl->vertBuf); + +#if NANOVG_GL_USE_UNIFORMBUFFER + // Create UBOs + glUniformBlockBinding(gl->shader.prog, gl->shader.loc[GLNVG_LOC_FRAG], GLNVG_FRAG_BINDING); + glGenBuffers(1, &gl->fragBuf); + glGetIntegerv(GL_UNIFORM_BUFFER_OFFSET_ALIGNMENT, &align); +#endif + gl->fragSize = sizeof(GLNVGfragUniforms) + align - sizeof(GLNVGfragUniforms) % align; + + // Some platforms does not allow to have samples to unset textures. + // Create empty one which is bound when there's no texture specified. + gl->dummyTex = glnvg__renderCreateTexture(gl, NVG_TEXTURE_ALPHA, 1, 1, 0, NULL); + + glnvg__checkError(gl, "create done"); + + glFinish(); + + return 1; +} + +static int glnvg__renderCreateTexture(void* uptr, int type, int w, int h, int imageFlags, const unsigned char* data) +{ + GLNVGcontext* gl = (GLNVGcontext*)uptr; + GLNVGtexture* tex = glnvg__allocTexture(gl); + + if (tex == NULL) return 0; + + printf("CreateTexture: Data is null %d\n", (data == NULL)); + +#ifdef NANOVG_GLES2 + // Check for non-power of 2. + if (glnvg__nearestPow2(w) != (unsigned int)w || glnvg__nearestPow2(h) != (unsigned int)h) { + // No repeat + if ((imageFlags & NVG_IMAGE_REPEATX) != 0 || (imageFlags & NVG_IMAGE_REPEATY) != 0) { + printf("Repeat X/Y is not supported for non power-of-two textures (%d x %d)\n", w, h); + imageFlags &= ~(NVG_IMAGE_REPEATX | NVG_IMAGE_REPEATY); + } + // No mips. + if (imageFlags & NVG_IMAGE_GENERATE_MIPMAPS) { + printf("Mip-maps is not support for non power-of-two textures (%d x %d)\n", w, h); + imageFlags &= ~NVG_IMAGE_GENERATE_MIPMAPS; + } + } +#endif + + glGenTextures(1, &tex->tex); + tex->width = w; + tex->height = h; + tex->type = type; + tex->flags = imageFlags; + glnvg__bindTexture(gl, tex->tex); + + glPixelStorei(GL_UNPACK_ALIGNMENT,1); +#ifndef NANOVG_GLES2 + glPixelStorei(GL_UNPACK_ROW_LENGTH, tex->width); + glPixelStorei(GL_UNPACK_SKIP_PIXELS, 0); + glPixelStorei(GL_UNPACK_SKIP_ROWS, 0); +#endif + +#if defined (NANOVG_GL2) + // GL 1.4 and later has support for generating mipmaps using a tex parameter. + if (imageFlags & NVG_IMAGE_GENERATE_MIPMAPS) { + glTexParameteri(GL_TEXTURE_2D, GL_GENERATE_MIPMAP, GL_TRUE); + } +#endif + + if (type == NVG_TEXTURE_RGBA) + glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, w, h, 0, GL_RGBA, GL_UNSIGNED_BYTE, data); + else +#if defined(NANOVG_GLES2) || defined (NANOVG_GL2) + glTexImage2D(GL_TEXTURE_2D, 0, GL_LUMINANCE, w, h, 0, GL_LUMINANCE, GL_UNSIGNED_BYTE, data); +#elif defined(NANOVG_GLES3) + glTexImage2D(GL_TEXTURE_2D, 0, GL_R8, w, h, 0, GL_RED, GL_UNSIGNED_BYTE, data); +#else + glTexImage2D(GL_TEXTURE_2D, 0, GL_RED, w, h, 0, GL_RED, GL_UNSIGNED_BYTE, data); +#endif + + if (imageFlags & NVG_IMAGE_GENERATE_MIPMAPS) { + if (imageFlags & NVG_IMAGE_NEAREST) { + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST_MIPMAP_NEAREST); + } else { + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR); + } + } else { + if (imageFlags & NVG_IMAGE_NEAREST) { + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); + } else { + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); + } + } + + if (imageFlags & NVG_IMAGE_NEAREST) { + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); + } else { + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); + } + + if (imageFlags & NVG_IMAGE_REPEATX) + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT); + else + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE); + + if (imageFlags & NVG_IMAGE_REPEATY) + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT); + else + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE); + + glPixelStorei(GL_UNPACK_ALIGNMENT, 4); +#ifndef NANOVG_GLES2 + glPixelStorei(GL_UNPACK_ROW_LENGTH, 0); + glPixelStorei(GL_UNPACK_SKIP_PIXELS, 0); + glPixelStorei(GL_UNPACK_SKIP_ROWS, 0); +#endif + + // The new way to build mipmaps on GLES and GL3 +#if !defined(NANOVG_GL2) + if (imageFlags & NVG_IMAGE_GENERATE_MIPMAPS) { + glGenerateMipmap(GL_TEXTURE_2D); + } +#endif + + glnvg__checkError(gl, "create tex"); + glnvg__bindTexture(gl, 0); + + return tex->id; +} + + +static int glnvg__renderDeleteTexture(void* uptr, int image) +{ + GLNVGcontext* gl = (GLNVGcontext*)uptr; + return glnvg__deleteTexture(gl, image); +} + +static int glnvg__renderUpdateTexture(void* uptr, int image, int x, int y, int w, int h, const unsigned char* data) +{ + GLNVGcontext* gl = (GLNVGcontext*)uptr; + GLNVGtexture* tex = glnvg__findTexture(gl, image); + + if (tex == NULL) return 0; + glnvg__bindTexture(gl, tex->tex); + + glPixelStorei(GL_UNPACK_ALIGNMENT,1); + +#ifndef NANOVG_GLES2 + glPixelStorei(GL_UNPACK_ROW_LENGTH, tex->width); + glPixelStorei(GL_UNPACK_SKIP_PIXELS, x); + glPixelStorei(GL_UNPACK_SKIP_ROWS, y); +#else + // No support for all of skip, need to update a whole row at a time. + if (tex->type == NVG_TEXTURE_RGBA) + data += y*tex->width*4; + else + data += y*tex->width; + x = 0; + w = tex->width; +#endif + + if (tex->type == NVG_TEXTURE_RGBA) + glTexSubImage2D(GL_TEXTURE_2D, 0, x,y, w,h, GL_RGBA, GL_UNSIGNED_BYTE, data); + else +#if defined(NANOVG_GLES2) || defined(NANOVG_GL2) + glTexSubImage2D(GL_TEXTURE_2D, 0, x,y, w,h, GL_LUMINANCE, GL_UNSIGNED_BYTE, data); +#else + glTexSubImage2D(GL_TEXTURE_2D, 0, x,y, w,h, GL_RED, GL_UNSIGNED_BYTE, data); +#endif + + glPixelStorei(GL_UNPACK_ALIGNMENT, 4); +#ifndef NANOVG_GLES2 + glPixelStorei(GL_UNPACK_ROW_LENGTH, 0); + glPixelStorei(GL_UNPACK_SKIP_PIXELS, 0); + glPixelStorei(GL_UNPACK_SKIP_ROWS, 0); +#endif + + glnvg__bindTexture(gl, 0); + + return 1; +} + +static int glnvg__renderGetTextureSize(void* uptr, int image, int* w, int* h) +{ + GLNVGcontext* gl = (GLNVGcontext*)uptr; + GLNVGtexture* tex = glnvg__findTexture(gl, image); + if (tex == NULL) return 0; + *w = tex->width; + *h = tex->height; + return 1; +} + +static void glnvg__xformToMat3x4(float* m3, float* t) +{ + m3[0] = t[0]; + m3[1] = t[1]; + m3[2] = 0.0f; + m3[3] = 0.0f; + m3[4] = t[2]; + m3[5] = t[3]; + m3[6] = 0.0f; + m3[7] = 0.0f; + m3[8] = t[4]; + m3[9] = t[5]; + m3[10] = 1.0f; + m3[11] = 0.0f; +} + +static NVGcolor glnvg__premulColor(NVGcolor c) +{ + c.r *= c.a; + c.g *= c.a; + c.b *= c.a; + return c; +} + +static int glnvg__convertPaint(GLNVGcontext* gl, GLNVGfragUniforms* frag, NVGpaint* paint, + NVGscissor* scissor, float width, float fringe, float strokeThr) +{ + GLNVGtexture* tex = NULL; + float invxform[6]; + + memset(frag, 0, sizeof(*frag)); + + frag->innerCol = glnvg__premulColor(paint->innerColor); + frag->outerCol = glnvg__premulColor(paint->outerColor); + + if (scissor->extent[0] < -0.5f || scissor->extent[1] < -0.5f) { + memset(frag->scissorMat, 0, sizeof(frag->scissorMat)); + frag->scissorExt[0] = 1.0f; + frag->scissorExt[1] = 1.0f; + frag->scissorScale[0] = 1.0f; + frag->scissorScale[1] = 1.0f; + } else { + nvgTransformInverse(invxform, scissor->xform); + glnvg__xformToMat3x4(frag->scissorMat, invxform); + frag->scissorExt[0] = scissor->extent[0]; + frag->scissorExt[1] = scissor->extent[1]; + frag->scissorScale[0] = sqrtf(scissor->xform[0]*scissor->xform[0] + scissor->xform[2]*scissor->xform[2]) / fringe; + frag->scissorScale[1] = sqrtf(scissor->xform[1]*scissor->xform[1] + scissor->xform[3]*scissor->xform[3]) / fringe; + } + + memcpy(frag->extent, paint->extent, sizeof(frag->extent)); + frag->strokeMult = (width*0.5f + fringe*0.5f) / fringe; + frag->strokeThr = strokeThr; + + if (paint->image != 0) { + tex = glnvg__findTexture(gl, paint->image); + if (tex == NULL) return 0; + if ((tex->flags & NVG_IMAGE_FLIPY) != 0) { + float m1[6], m2[6]; + nvgTransformTranslate(m1, 0.0f, frag->extent[1] * 0.5f); + nvgTransformMultiply(m1, paint->xform); + nvgTransformScale(m2, 1.0f, -1.0f); + nvgTransformMultiply(m2, m1); + nvgTransformTranslate(m1, 0.0f, -frag->extent[1] * 0.5f); + nvgTransformMultiply(m1, m2); + nvgTransformInverse(invxform, m1); + } else { + nvgTransformInverse(invxform, paint->xform); + } + frag->type = NSVG_SHADER_FILLIMG; + + #if NANOVG_GL_USE_UNIFORMBUFFER + if (tex->type == NVG_TEXTURE_RGBA) + frag->texType = (tex->flags & NVG_IMAGE_PREMULTIPLIED) ? 0 : 1; + else + frag->texType = 2; + #else + if (tex->type == NVG_TEXTURE_RGBA) + frag->texType = (tex->flags & NVG_IMAGE_PREMULTIPLIED) ? 0.0f : 1.0f; + else + frag->texType = 2.0f; + #endif +// printf("frag->texType = %d\n", frag->texType); + } else { + frag->type = NSVG_SHADER_FILLGRAD; + frag->radius = paint->radius; + frag->feather = paint->feather; + nvgTransformInverse(invxform, paint->xform); + } + + glnvg__xformToMat3x4(frag->paintMat, invxform); + + return 1; +} + +static GLNVGfragUniforms* nvg__fragUniformPtr(GLNVGcontext* gl, int i); + +static void glnvg__setUniforms(GLNVGcontext* gl, int uniformOffset, int image) +{ + GLNVGtexture* tex = NULL; +#if NANOVG_GL_USE_UNIFORMBUFFER + glBindBufferRange(GL_UNIFORM_BUFFER, GLNVG_FRAG_BINDING, gl->fragBuf, uniformOffset, sizeof(GLNVGfragUniforms)); +#else + GLNVGfragUniforms* frag = nvg__fragUniformPtr(gl, uniformOffset); + glUniform4fv(gl->shader.loc[GLNVG_LOC_FRAG], NANOVG_GL_UNIFORMARRAY_SIZE, &(frag->uniformArray[0][0])); +#endif + + if (image != 0) { + tex = glnvg__findTexture(gl, image); + } + // If no image is set, use empty texture + if (tex == NULL) { + tex = glnvg__findTexture(gl, gl->dummyTex); + } + glnvg__bindTexture(gl, tex != NULL ? tex->tex : 0); + glnvg__checkError(gl, "tex paint tex"); +} + +static void glnvg__renderViewport(void* uptr, float width, float height, float devicePixelRatio) +{ + NVG_NOTUSED(devicePixelRatio); + GLNVGcontext* gl = (GLNVGcontext*)uptr; + gl->view[0] = width; + gl->view[1] = height; +} + +static void glnvg__fill(GLNVGcontext* gl, GLNVGcall* call) +{ + GLNVGpath* paths = &gl->paths[call->pathOffset]; + int i, npaths = call->pathCount; + + // Draw shapes + glEnable(GL_STENCIL_TEST); + glnvg__stencilMask(gl, 0xff); + glnvg__stencilFunc(gl, GL_ALWAYS, 0, 0xff); + glColorMask(GL_FALSE, GL_FALSE, GL_FALSE, GL_FALSE); + + // set bindpoint for solid loc + glnvg__setUniforms(gl, call->uniformOffset, 0); + glnvg__checkError(gl, "fill simple"); + + glStencilOpSeparate(GL_FRONT, GL_KEEP, GL_KEEP, GL_INCR_WRAP); + glStencilOpSeparate(GL_BACK, GL_KEEP, GL_KEEP, GL_DECR_WRAP); + glDisable(GL_CULL_FACE); + for (i = 0; i < npaths; i++) + glDrawArrays(GL_TRIANGLE_FAN, paths[i].fillOffset, paths[i].fillCount); + glEnable(GL_CULL_FACE); + + // Draw anti-aliased pixels + glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE); + + glnvg__setUniforms(gl, call->uniformOffset + gl->fragSize, call->image); + glnvg__checkError(gl, "fill fill"); + + if (gl->flags & NVG_ANTIALIAS) { + glnvg__stencilFunc(gl, GL_EQUAL, 0x00, 0xff); + glStencilOp(GL_KEEP, GL_KEEP, GL_KEEP); + // Draw fringes + for (i = 0; i < npaths; i++) + glDrawArrays(GL_TRIANGLE_STRIP, paths[i].strokeOffset, paths[i].strokeCount); + } + + // Draw fill + glnvg__stencilFunc(gl, GL_NOTEQUAL, 0x0, 0xff); + glStencilOp(GL_ZERO, GL_ZERO, GL_ZERO); + glDrawArrays(GL_TRIANGLE_STRIP, call->triangleOffset, call->triangleCount); + + glDisable(GL_STENCIL_TEST); +} + +static void glnvg__convexFill(GLNVGcontext* gl, GLNVGcall* call) +{ + GLNVGpath* paths = &gl->paths[call->pathOffset]; + int i, npaths = call->pathCount; + + glnvg__setUniforms(gl, call->uniformOffset, call->image); + glnvg__checkError(gl, "convex fill"); + + for (i = 0; i < npaths; i++) { + glDrawArrays(GL_TRIANGLE_FAN, paths[i].fillOffset, paths[i].fillCount); + // Draw fringes + if (paths[i].strokeCount > 0) { + glDrawArrays(GL_TRIANGLE_STRIP, paths[i].strokeOffset, paths[i].strokeCount); + } + } +} + +static void glnvg__stroke(GLNVGcontext* gl, GLNVGcall* call) +{ + GLNVGpath* paths = &gl->paths[call->pathOffset]; + int npaths = call->pathCount, i; + + if (gl->flags & NVG_STENCIL_STROKES) { + + glEnable(GL_STENCIL_TEST); + glnvg__stencilMask(gl, 0xff); + + // Fill the stroke base without overlap + glnvg__stencilFunc(gl, GL_EQUAL, 0x0, 0xff); + glStencilOp(GL_KEEP, GL_KEEP, GL_INCR); + glnvg__setUniforms(gl, call->uniformOffset + gl->fragSize, call->image); + glnvg__checkError(gl, "stroke fill 0"); + for (i = 0; i < npaths; i++) + glDrawArrays(GL_TRIANGLE_STRIP, paths[i].strokeOffset, paths[i].strokeCount); + + // Draw anti-aliased pixels. + glnvg__setUniforms(gl, call->uniformOffset, call->image); + glnvg__stencilFunc(gl, GL_EQUAL, 0x00, 0xff); + glStencilOp(GL_KEEP, GL_KEEP, GL_KEEP); + for (i = 0; i < npaths; i++) + glDrawArrays(GL_TRIANGLE_STRIP, paths[i].strokeOffset, paths[i].strokeCount); + + // Clear stencil buffer. + glColorMask(GL_FALSE, GL_FALSE, GL_FALSE, GL_FALSE); + glnvg__stencilFunc(gl, GL_ALWAYS, 0x0, 0xff); + glStencilOp(GL_ZERO, GL_ZERO, GL_ZERO); + glnvg__checkError(gl, "stroke fill 1"); + for (i = 0; i < npaths; i++) { + glDrawArrays(GL_TRIANGLE_STRIP, paths[i].strokeOffset, paths[i].strokeCount); + } + glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE); + + glDisable(GL_STENCIL_TEST); + +// glnvg__convertPaint(gl, nvg__fragUniformPtr(gl, call->uniformOffset + gl->fragSize), paint, scissor, strokeWidth, fringe, 1.0f - 0.5f/255.0f); + + } else { + glnvg__setUniforms(gl, call->uniformOffset, call->image); + glnvg__checkError(gl, "stroke fill"); + // Draw Strokes + for (i = 0; i < npaths; i++) + glDrawArrays(GL_TRIANGLE_STRIP, paths[i].strokeOffset, paths[i].strokeCount); + } +} + +static void glnvg__triangles(GLNVGcontext* gl, GLNVGcall* call) +{ + glnvg__setUniforms(gl, call->uniformOffset, call->image); + glnvg__checkError(gl, "triangles fill"); + + glDrawArrays(GL_TRIANGLES, call->triangleOffset, call->triangleCount); +} + +static void glnvg__renderCancel(void* uptr) { + GLNVGcontext* gl = (GLNVGcontext*)uptr; + gl->nverts = 0; + gl->npaths = 0; + gl->ncalls = 0; + gl->nuniforms = 0; +} + +static GLenum glnvg_convertBlendFuncFactor(int factor) +{ + if (factor == NVG_ZERO) + return GL_ZERO; + if (factor == NVG_ONE) + return GL_ONE; + if (factor == NVG_SRC_COLOR) + return GL_SRC_COLOR; + if (factor == NVG_ONE_MINUS_SRC_COLOR) + return GL_ONE_MINUS_SRC_COLOR; + if (factor == NVG_DST_COLOR) + return GL_DST_COLOR; + if (factor == NVG_ONE_MINUS_DST_COLOR) + return GL_ONE_MINUS_DST_COLOR; + if (factor == NVG_SRC_ALPHA) + return GL_SRC_ALPHA; + if (factor == NVG_ONE_MINUS_SRC_ALPHA) + return GL_ONE_MINUS_SRC_ALPHA; + if (factor == NVG_DST_ALPHA) + return GL_DST_ALPHA; + if (factor == NVG_ONE_MINUS_DST_ALPHA) + return GL_ONE_MINUS_DST_ALPHA; + if (factor == NVG_SRC_ALPHA_SATURATE) + return GL_SRC_ALPHA_SATURATE; + return GL_INVALID_ENUM; +} + +static GLNVGblend glnvg__blendCompositeOperation(NVGcompositeOperationState op) +{ + GLNVGblend blend; + blend.srcRGB = glnvg_convertBlendFuncFactor(op.srcRGB); + blend.dstRGB = glnvg_convertBlendFuncFactor(op.dstRGB); + blend.srcAlpha = glnvg_convertBlendFuncFactor(op.srcAlpha); + blend.dstAlpha = glnvg_convertBlendFuncFactor(op.dstAlpha); + if (blend.srcRGB == GL_INVALID_ENUM || blend.dstRGB == GL_INVALID_ENUM || blend.srcAlpha == GL_INVALID_ENUM || blend.dstAlpha == GL_INVALID_ENUM) + { + blend.srcRGB = GL_ONE; + blend.dstRGB = GL_ONE_MINUS_SRC_ALPHA; + blend.srcAlpha = GL_ONE; + blend.dstAlpha = GL_ONE_MINUS_SRC_ALPHA; + } + return blend; +} + +static void glnvg__renderFlush(void* uptr) +{ + GLNVGcontext* gl = (GLNVGcontext*)uptr; + int i; + + if (gl->ncalls > 0) { + + // Setup require GL state. + glUseProgram(gl->shader.prog); + + glEnable(GL_CULL_FACE); + glCullFace(GL_BACK); + glFrontFace(GL_CCW); + glEnable(GL_BLEND); + glDisable(GL_DEPTH_TEST); + glDisable(GL_SCISSOR_TEST); + glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE); + glStencilMask(0xffffffff); + glStencilOp(GL_KEEP, GL_KEEP, GL_KEEP); + glStencilFunc(GL_ALWAYS, 0, 0xffffffff); + glActiveTexture(GL_TEXTURE0); + glBindTexture(GL_TEXTURE_2D, 0); + #if NANOVG_GL_USE_STATE_FILTER + gl->boundTexture = 0; + gl->stencilMask = 0xffffffff; + gl->stencilFunc = GL_ALWAYS; + gl->stencilFuncRef = 0; + gl->stencilFuncMask = 0xffffffff; + gl->blendFunc.srcRGB = GL_INVALID_ENUM; + gl->blendFunc.srcAlpha = GL_INVALID_ENUM; + gl->blendFunc.dstRGB = GL_INVALID_ENUM; + gl->blendFunc.dstAlpha = GL_INVALID_ENUM; + #endif + +#if NANOVG_GL_USE_UNIFORMBUFFER + // Upload ubo for frag shaders + glBindBuffer(GL_UNIFORM_BUFFER, gl->fragBuf); + glBufferData(GL_UNIFORM_BUFFER, gl->nuniforms * gl->fragSize, gl->uniforms, GL_STREAM_DRAW); +#endif + + // Upload vertex data +#if defined NANOVG_GL3 + glBindVertexArray(gl->vertArr); +#endif + glBindBuffer(GL_ARRAY_BUFFER, gl->vertBuf); + glBufferData(GL_ARRAY_BUFFER, gl->nverts * sizeof(NVGvertex), gl->verts, GL_STREAM_DRAW); + glEnableVertexAttribArray(0); + glEnableVertexAttribArray(1); + glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, sizeof(NVGvertex), (const GLvoid*)(size_t)0); + glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, sizeof(NVGvertex), (const GLvoid*)(0 + 2*sizeof(float))); + + // Set view and texture just once per frame. + glUniform1i(gl->shader.loc[GLNVG_LOC_TEX], 0); + glUniform2fv(gl->shader.loc[GLNVG_LOC_VIEWSIZE], 1, gl->view); + +#if NANOVG_GL_USE_UNIFORMBUFFER + glBindBuffer(GL_UNIFORM_BUFFER, gl->fragBuf); +#endif + + for (i = 0; i < gl->ncalls; i++) { + GLNVGcall* call = &gl->calls[i]; + glnvg__blendFuncSeparate(gl,&call->blendFunc); + if (call->type == GLNVG_FILL) { + glnvg__fill(gl, call); + } + else if (call->type == GLNVG_CONVEXFILL) { + glnvg__convexFill(gl, call); + } + else if (call->type == GLNVG_STROKE) { + glnvg__stroke(gl, call); + } + else if (call->type == GLNVG_TRIANGLES) { + glnvg__triangles(gl, call); + } + } + + glDisableVertexAttribArray(0); + glDisableVertexAttribArray(1); +#if defined NANOVG_GL3 + glBindVertexArray(0); +#endif + glDisable(GL_CULL_FACE); + glBindBuffer(GL_ARRAY_BUFFER, 0); + glUseProgram(0); + glnvg__bindTexture(gl, 0); + } + + // Reset calls + gl->nverts = 0; + gl->npaths = 0; + gl->ncalls = 0; + gl->nuniforms = 0; +} + +static int glnvg__maxVertCount(const NVGpath* paths, int npaths) +{ + int i, count = 0; + for (i = 0; i < npaths; i++) { + count += paths[i].nfill; + count += paths[i].nstroke; + } + return count; +} + +static GLNVGcall* glnvg__allocCall(GLNVGcontext* gl) +{ + GLNVGcall* ret = NULL; + if (gl->ncalls+1 > gl->ccalls) { + GLNVGcall* calls; + int ccalls = glnvg__maxi(gl->ncalls+1, 128) + gl->ccalls/2; // 1.5x Overallocate + calls = (GLNVGcall*)realloc(gl->calls, sizeof(GLNVGcall) * ccalls); + if (calls == NULL) return NULL; + gl->calls = calls; + gl->ccalls = ccalls; + } + ret = &gl->calls[gl->ncalls++]; + memset(ret, 0, sizeof(GLNVGcall)); + return ret; +} + +static int glnvg__allocPaths(GLNVGcontext* gl, int n) +{ + int ret = 0; + if (gl->npaths+n > gl->cpaths) { + GLNVGpath* paths; + int cpaths = glnvg__maxi(gl->npaths + n, 128) + gl->cpaths/2; // 1.5x Overallocate + paths = (GLNVGpath*)realloc(gl->paths, sizeof(GLNVGpath) * cpaths); + if (paths == NULL) return -1; + gl->paths = paths; + gl->cpaths = cpaths; + } + ret = gl->npaths; + gl->npaths += n; + return ret; +} + +static int glnvg__allocVerts(GLNVGcontext* gl, int n) +{ + int ret = 0; + if (gl->nverts+n > gl->cverts) { + NVGvertex* verts; + int cverts = glnvg__maxi(gl->nverts + n, 4096) + gl->cverts/2; // 1.5x Overallocate + verts = (NVGvertex*)realloc(gl->verts, sizeof(NVGvertex) * cverts); + if (verts == NULL) return -1; + gl->verts = verts; + gl->cverts = cverts; + } + ret = gl->nverts; + gl->nverts += n; + return ret; +} + +static int glnvg__allocFragUniforms(GLNVGcontext* gl, int n) +{ + int ret = 0, structSize = gl->fragSize; + if (gl->nuniforms+n > gl->cuniforms) { + unsigned char* uniforms; + int cuniforms = glnvg__maxi(gl->nuniforms+n, 128) + gl->cuniforms/2; // 1.5x Overallocate + uniforms = (unsigned char*)realloc(gl->uniforms, structSize * cuniforms); + if (uniforms == NULL) return -1; + gl->uniforms = uniforms; + gl->cuniforms = cuniforms; + } + ret = gl->nuniforms * structSize; + gl->nuniforms += n; + return ret; +} + +static GLNVGfragUniforms* nvg__fragUniformPtr(GLNVGcontext* gl, int i) +{ + return (GLNVGfragUniforms*)&gl->uniforms[i]; +} + +static void glnvg__vset(NVGvertex* vtx, float x, float y, float u, float v) +{ + vtx->x = x; + vtx->y = y; + vtx->u = u; + vtx->v = v; +} + +static void glnvg__renderFill(void* uptr, NVGpaint* paint, NVGcompositeOperationState compositeOperation, NVGscissor* scissor, float fringe, + const float* bounds, const NVGpath* paths, int npaths) +{ + GLNVGcontext* gl = (GLNVGcontext*)uptr; + GLNVGcall* call = glnvg__allocCall(gl); + NVGvertex* quad; + GLNVGfragUniforms* frag; + int i, maxverts, offset; + + if (call == NULL) return; + + call->type = GLNVG_FILL; + call->triangleCount = 4; + call->pathOffset = glnvg__allocPaths(gl, npaths); + if (call->pathOffset == -1) goto error; + call->pathCount = npaths; + call->image = paint->image; + call->blendFunc = glnvg__blendCompositeOperation(compositeOperation); + + if (npaths == 1 && paths[0].convex) + { + call->type = GLNVG_CONVEXFILL; + call->triangleCount = 0; // Bounding box fill quad not needed for convex fill + } + + // Allocate vertices for all the paths. + maxverts = glnvg__maxVertCount(paths, npaths) + call->triangleCount; + offset = glnvg__allocVerts(gl, maxverts); + if (offset == -1) goto error; + + for (i = 0; i < npaths; i++) { + GLNVGpath* copy = &gl->paths[call->pathOffset + i]; + const NVGpath* path = &paths[i]; + memset(copy, 0, sizeof(GLNVGpath)); + if (path->nfill > 0) { + copy->fillOffset = offset; + copy->fillCount = path->nfill; + memcpy(&gl->verts[offset], path->fill, sizeof(NVGvertex) * path->nfill); + offset += path->nfill; + } + if (path->nstroke > 0) { + copy->strokeOffset = offset; + copy->strokeCount = path->nstroke; + memcpy(&gl->verts[offset], path->stroke, sizeof(NVGvertex) * path->nstroke); + offset += path->nstroke; + } + } + + // Setup uniforms for draw calls + if (call->type == GLNVG_FILL) { + // Quad + call->triangleOffset = offset; + quad = &gl->verts[call->triangleOffset]; + glnvg__vset(&quad[0], bounds[2], bounds[3], 0.5f, 1.0f); + glnvg__vset(&quad[1], bounds[2], bounds[1], 0.5f, 1.0f); + glnvg__vset(&quad[2], bounds[0], bounds[3], 0.5f, 1.0f); + glnvg__vset(&quad[3], bounds[0], bounds[1], 0.5f, 1.0f); + + call->uniformOffset = glnvg__allocFragUniforms(gl, 2); + if (call->uniformOffset == -1) goto error; + // Simple shader for stencil + frag = nvg__fragUniformPtr(gl, call->uniformOffset); + memset(frag, 0, sizeof(*frag)); + frag->strokeThr = -1.0f; + frag->type = NSVG_SHADER_SIMPLE; + // Fill shader + glnvg__convertPaint(gl, nvg__fragUniformPtr(gl, call->uniformOffset + gl->fragSize), paint, scissor, fringe, fringe, -1.0f); + } else { + call->uniformOffset = glnvg__allocFragUniforms(gl, 1); + if (call->uniformOffset == -1) goto error; + // Fill shader + glnvg__convertPaint(gl, nvg__fragUniformPtr(gl, call->uniformOffset), paint, scissor, fringe, fringe, -1.0f); + } + + return; + +error: + // We get here if call alloc was ok, but something else is not. + // Roll back the last call to prevent drawing it. + if (gl->ncalls > 0) gl->ncalls--; +} + +static void glnvg__renderStroke(void* uptr, NVGpaint* paint, NVGcompositeOperationState compositeOperation, NVGscissor* scissor, float fringe, + float strokeWidth, const NVGpath* paths, int npaths) +{ + GLNVGcontext* gl = (GLNVGcontext*)uptr; + GLNVGcall* call = glnvg__allocCall(gl); + int i, maxverts, offset; + + if (call == NULL) return; + + call->type = GLNVG_STROKE; + call->pathOffset = glnvg__allocPaths(gl, npaths); + if (call->pathOffset == -1) goto error; + call->pathCount = npaths; + call->image = paint->image; + call->blendFunc = glnvg__blendCompositeOperation(compositeOperation); + + // Allocate vertices for all the paths. + maxverts = glnvg__maxVertCount(paths, npaths); + offset = glnvg__allocVerts(gl, maxverts); + if (offset == -1) goto error; + + for (i = 0; i < npaths; i++) { + GLNVGpath* copy = &gl->paths[call->pathOffset + i]; + const NVGpath* path = &paths[i]; + memset(copy, 0, sizeof(GLNVGpath)); + if (path->nstroke) { + copy->strokeOffset = offset; + copy->strokeCount = path->nstroke; + memcpy(&gl->verts[offset], path->stroke, sizeof(NVGvertex) * path->nstroke); + offset += path->nstroke; + } + } + + if (gl->flags & NVG_STENCIL_STROKES) { + // Fill shader + call->uniformOffset = glnvg__allocFragUniforms(gl, 2); + if (call->uniformOffset == -1) goto error; + + glnvg__convertPaint(gl, nvg__fragUniformPtr(gl, call->uniformOffset), paint, scissor, strokeWidth, fringe, -1.0f); + glnvg__convertPaint(gl, nvg__fragUniformPtr(gl, call->uniformOffset + gl->fragSize), paint, scissor, strokeWidth, fringe, 1.0f - 0.5f/255.0f); + + } else { + // Fill shader + call->uniformOffset = glnvg__allocFragUniforms(gl, 1); + if (call->uniformOffset == -1) goto error; + glnvg__convertPaint(gl, nvg__fragUniformPtr(gl, call->uniformOffset), paint, scissor, strokeWidth, fringe, -1.0f); + } + + return; + +error: + // We get here if call alloc was ok, but something else is not. + // Roll back the last call to prevent drawing it. + if (gl->ncalls > 0) gl->ncalls--; +} + +static void glnvg__renderTriangles(void* uptr, NVGpaint* paint, NVGcompositeOperationState compositeOperation, NVGscissor* scissor, + const NVGvertex* verts, int nverts, float fringe) +{ + GLNVGcontext* gl = (GLNVGcontext*)uptr; + GLNVGcall* call = glnvg__allocCall(gl); + GLNVGfragUniforms* frag; + + if (call == NULL) return; + + call->type = GLNVG_TRIANGLES; + call->image = paint->image; + call->blendFunc = glnvg__blendCompositeOperation(compositeOperation); + + // Allocate vertices for all the paths. + call->triangleOffset = glnvg__allocVerts(gl, nverts); + if (call->triangleOffset == -1) goto error; + call->triangleCount = nverts; + + memcpy(&gl->verts[call->triangleOffset], verts, sizeof(NVGvertex) * nverts); + + // Fill shader + call->uniformOffset = glnvg__allocFragUniforms(gl, 1); + if (call->uniformOffset == -1) goto error; + frag = nvg__fragUniformPtr(gl, call->uniformOffset); + glnvg__convertPaint(gl, frag, paint, scissor, 1.0f, fringe, -1.0f); + frag->type = NSVG_SHADER_IMG; + + return; + +error: + // We get here if call alloc was ok, but something else is not. + // Roll back the last call to prevent drawing it. + if (gl->ncalls > 0) gl->ncalls--; +} + +static void glnvg__renderDelete(void* uptr) +{ + GLNVGcontext* gl = (GLNVGcontext*)uptr; + int i; + if (gl == NULL) return; + + glnvg__deleteShader(&gl->shader); + +#if NANOVG_GL3 +#if NANOVG_GL_USE_UNIFORMBUFFER + if (gl->fragBuf != 0) + glDeleteBuffers(1, &gl->fragBuf); +#endif + if (gl->vertArr != 0) + glDeleteVertexArrays(1, &gl->vertArr); +#endif + if (gl->vertBuf != 0) + glDeleteBuffers(1, &gl->vertBuf); + + for (i = 0; i < gl->ntextures; i++) { + if (gl->textures[i].tex != 0 && (gl->textures[i].flags & NVG_IMAGE_NODELETE) == 0) + glDeleteTextures(1, &gl->textures[i].tex); + } + free(gl->textures); + + free(gl->paths); + free(gl->verts); + free(gl->uniforms); + free(gl->calls); + + free(gl); +} + + +#if defined NANOVG_GL2 +NVGcontext* nvgCreateGL2(int flags) +#elif defined NANOVG_GL3 +NVGcontext* nvgCreateGL3(int flags) +#elif defined NANOVG_GLES2 +NVGcontext* nvgCreateGLES2(int flags) +#elif defined NANOVG_GLES3 +NVGcontext* nvgCreateGLES3(int flags) +#endif +{ + NVGparams params; + NVGcontext* ctx = NULL; + GLNVGcontext* gl = (GLNVGcontext*)malloc(sizeof(GLNVGcontext)); + if (gl == NULL) goto error; + memset(gl, 0, sizeof(GLNVGcontext)); + + memset(¶ms, 0, sizeof(params)); + params.renderCreate = glnvg__renderCreate; + params.renderCreateTexture = glnvg__renderCreateTexture; + params.renderDeleteTexture = glnvg__renderDeleteTexture; + params.renderUpdateTexture = glnvg__renderUpdateTexture; + params.renderGetTextureSize = glnvg__renderGetTextureSize; + params.renderViewport = glnvg__renderViewport; + params.renderCancel = glnvg__renderCancel; + params.renderFlush = glnvg__renderFlush; + params.renderFill = glnvg__renderFill; + params.renderStroke = glnvg__renderStroke; + params.renderTriangles = glnvg__renderTriangles; + params.renderDelete = glnvg__renderDelete; + params.userPtr = gl; + params.edgeAntiAlias = flags & NVG_ANTIALIAS ? 1 : 0; + + gl->flags = flags; + + ctx = nvgCreateInternal(¶ms); + if (ctx == NULL) goto error; + + return ctx; + +error: + // 'gl' is freed by nvgDeleteInternal. + if (ctx != NULL) nvgDeleteInternal(ctx); + return NULL; +} + +#if defined NANOVG_GL2 +void nvgDeleteGL2(NVGcontext* ctx) +#elif defined NANOVG_GL3 +void nvgDeleteGL3(NVGcontext* ctx) +#elif defined NANOVG_GLES2 +void nvgDeleteGLES2(NVGcontext* ctx) +#elif defined NANOVG_GLES3 +void nvgDeleteGLES3(NVGcontext* ctx) +#endif +{ + nvgDeleteInternal(ctx); +} + +#if defined NANOVG_GL2 +int nvglCreateImageFromHandleGL2(NVGcontext* ctx, GLuint textureId, int w, int h, int imageFlags) +#elif defined NANOVG_GL3 +int nvglCreateImageFromHandleGL3(NVGcontext* ctx, GLuint textureId, int w, int h, int imageFlags) +#elif defined NANOVG_GLES2 +int nvglCreateImageFromHandleGLES2(NVGcontext* ctx, GLuint textureId, int w, int h, int imageFlags) +#elif defined NANOVG_GLES3 +int nvglCreateImageFromHandleGLES3(NVGcontext* ctx, GLuint textureId, int w, int h, int imageFlags) +#endif +{ + GLNVGcontext* gl = (GLNVGcontext*)nvgInternalParams(ctx)->userPtr; + GLNVGtexture* tex = glnvg__allocTexture(gl); + + if (tex == NULL) return 0; + + tex->type = NVG_TEXTURE_RGBA; + tex->tex = textureId; + tex->flags = imageFlags; + tex->width = w; + tex->height = h; + + return tex->id; +} + +#if defined NANOVG_GL2 +GLuint nvglImageHandleGL2(NVGcontext* ctx, int image) +#elif defined NANOVG_GL3 +GLuint nvglImageHandleGL3(NVGcontext* ctx, int image) +#elif defined NANOVG_GLES2 +GLuint nvglImageHandleGLES2(NVGcontext* ctx, int image) +#elif defined NANOVG_GLES3 +GLuint nvglImageHandleGLES3(NVGcontext* ctx, int image) +#endif +{ + GLNVGcontext* gl = (GLNVGcontext*)nvgInternalParams(ctx)->userPtr; + GLNVGtexture* tex = glnvg__findTexture(gl, image); + return tex->tex; +} + +#endif /* USE_OPENGL */ + +#endif /* NANOVG_GL_IMPLEMENTATION */ diff --git a/troposphere/daybreak/nanovg/shaders/fill_aa_fsh.glsl b/troposphere/daybreak/nanovg/shaders/fill_aa_fsh.glsl new file mode 100644 index 000000000..01604450d --- /dev/null +++ b/troposphere/daybreak/nanovg/shaders/fill_aa_fsh.glsl @@ -0,0 +1,83 @@ +#version 460 + +layout(binding = 0) uniform sampler2D tex; + +layout(std140, binding = 0) uniform frag { + mat3 scissorMat; + mat3 paintMat; + vec4 innerCol; + vec4 outerCol; + vec2 scissorExt; + vec2 scissorScale; + vec2 extent; + float radius; + float feather; + float strokeMult; + float strokeThr; + int texType; + int type; +}; + +layout(location = 0) in vec2 ftcoord; +layout(location = 1) in vec2 fpos; +layout(location = 0) out vec4 outColor; + +float sdroundrect(vec2 pt, vec2 ext, float rad) { + vec2 ext2 = ext - vec2(rad,rad); + vec2 d = abs(pt) - ext2; + return min(max(d.x,d.y),0.0) + length(max(d,0.0)) - rad; +} + +// Scissoring +float scissorMask(vec2 p) { + vec2 sc = (abs((scissorMat * vec3(p,1.0)).xy) - scissorExt); + sc = vec2(0.5,0.5) - sc * scissorScale; + return clamp(sc.x,0.0,1.0) * clamp(sc.y,0.0,1.0); +} + +// Stroke - from [0..1] to clipped pyramid, where the slope is 1px. +float strokeMask() { + return min(1.0, (1.0-abs(ftcoord.x*2.0-1.0))*strokeMult) * min(1.0, ftcoord.y); +} + +void main(void) { + vec4 result; + float scissor = scissorMask(fpos); + float strokeAlpha = strokeMask(); + + if (strokeAlpha < strokeThr) discard; + + if (type == 0) { // Gradient + // Calculate gradient color using box gradient + vec2 pt = (paintMat * vec3(fpos,1.0)).xy; + float d = clamp((sdroundrect(pt, extent, radius) + feather*0.5) / feather, 0.0, 1.0); + vec4 color = mix(innerCol,outerCol,d); + // Combine alpha + color *= strokeAlpha * scissor; + result = color; + } else if (type == 1) { // Image + // Calculate color fron texture + vec2 pt = (paintMat * vec3(fpos,1.0)).xy / extent; + vec4 color = texture(tex, pt); + + if (texType == 1) color = vec4(color.xyz*color.w,color.w); + if (texType == 2) color = vec4(color.x); + // Apply color tint and alpha. + color *= innerCol; + // Combine alpha + color *= strokeAlpha * scissor; + result = color; + } else if (type == 2) { // Stencil fill + result = vec4(1,1,1,1); + } else if (type == 3) { // Textured tris + + vec4 color = texture(tex, ftcoord); + + if (texType == 1) color = vec4(color.xyz*color.w,color.w); + if (texType == 2) color = vec4(color.x); + color *= scissor; + result = color * innerCol; + } + + outColor = result; +}; \ No newline at end of file diff --git a/troposphere/daybreak/nanovg/shaders/fill_fsh.glsl b/troposphere/daybreak/nanovg/shaders/fill_fsh.glsl new file mode 100644 index 000000000..6b6e2cc80 --- /dev/null +++ b/troposphere/daybreak/nanovg/shaders/fill_fsh.glsl @@ -0,0 +1,76 @@ +#version 460 + +layout(binding = 0) uniform sampler2D tex; + +layout(std140, binding = 0) uniform frag { + mat3 scissorMat; + mat3 paintMat; + vec4 innerCol; + vec4 outerCol; + vec2 scissorExt; + vec2 scissorScale; + vec2 extent; + float radius; + float feather; + float strokeMult; + float strokeThr; + int texType; + int type; +}; + +layout(location = 0) in vec2 ftcoord; +layout(location = 1) in vec2 fpos; +layout(location = 0) out vec4 outColor; + +float sdroundrect(vec2 pt, vec2 ext, float rad) { + vec2 ext2 = ext - vec2(rad,rad); + vec2 d = abs(pt) - ext2; + return min(max(d.x,d.y),0.0) + length(max(d,0.0)) - rad; +} + +// Scissoring +float scissorMask(vec2 p) { + vec2 sc = (abs((scissorMat * vec3(p,1.0)).xy) - scissorExt); + sc = vec2(0.5,0.5) - sc * scissorScale; + return clamp(sc.x,0.0,1.0) * clamp(sc.y,0.0,1.0); +} + +void main(void) { + vec4 result; + float scissor = scissorMask(fpos); + float strokeAlpha = 1.0; + + if (type == 0) { // Gradient + // Calculate gradient color using box gradient + vec2 pt = (paintMat * vec3(fpos,1.0)).xy; + float d = clamp((sdroundrect(pt, extent, radius) + feather*0.5) / feather, 0.0, 1.0); + vec4 color = mix(innerCol,outerCol,d); + // Combine alpha + color *= strokeAlpha * scissor; + result = color; + } else if (type == 1) { // Image + // Calculate color fron texture + vec2 pt = (paintMat * vec3(fpos,1.0)).xy / extent; + vec4 color = texture(tex, pt); + + if (texType == 1) color = vec4(color.xyz*color.w,color.w); + if (texType == 2) color = vec4(color.x); + // Apply color tint and alpha. + color *= innerCol; + // Combine alpha + color *= strokeAlpha * scissor; + result = color; + } else if (type == 2) { // Stencil fill + result = vec4(1,1,1,1); + } else if (type == 3) { // Textured tris + + vec4 color = texture(tex, ftcoord); + + if (texType == 1) color = vec4(color.xyz*color.w,color.w); + if (texType == 2) color = vec4(color.x); + color *= scissor; + result = color * innerCol; + } + + outColor = result; +}; \ No newline at end of file diff --git a/troposphere/daybreak/nanovg/shaders/fill_vsh.glsl b/troposphere/daybreak/nanovg/shaders/fill_vsh.glsl new file mode 100644 index 000000000..1e711a71c --- /dev/null +++ b/troposphere/daybreak/nanovg/shaders/fill_vsh.glsl @@ -0,0 +1,17 @@ +#version 460 + +layout (location = 0) in vec2 vertex; +layout (location = 1) in vec2 tcoord; +layout (location = 0) out vec2 ftcoord; +layout (location = 1) out vec2 fpos; + +layout (std140, binding = 0) uniform View +{ + vec2 size; +} view; + +void main(void) { + ftcoord = tcoord; + fpos = vertex; + gl_Position = vec4(2.0*vertex.x/view.size.x - 1.0, 1.0 - 2.0*vertex.y/view.size.y, 0, 1); +}; \ No newline at end of file diff --git a/troposphere/daybreak/nanovg/source/dk_renderer.cpp b/troposphere/daybreak/nanovg/source/dk_renderer.cpp new file mode 100644 index 000000000..c9706a4de --- /dev/null +++ b/troposphere/daybreak/nanovg/source/dk_renderer.cpp @@ -0,0 +1,545 @@ +#include "dk_renderer.hpp" + +#include +#include +#include +#include +#include +#include + +#define GLM_FORCE_DEFAULT_ALIGNED_GENTYPES /* Enforces GLSL std140/std430 alignment rules for glm types. */ +#define GLM_FORCE_INTRINSICS /* Enables usage of SIMD CPU instructions (requiring the above as well). */ +#include + +namespace nvg { + + namespace { + + constexpr std::array VertexBufferState = { DkVtxBufferState{sizeof(NVGvertex), 0}, }; + + constexpr std::array VertexAttribState = { + DkVtxAttribState{0, 0, offsetof(NVGvertex, x), DkVtxAttribSize_2x32, DkVtxAttribType_Float, 0}, + DkVtxAttribState{0, 0, offsetof(NVGvertex, u), DkVtxAttribSize_2x32, DkVtxAttribType_Float, 0}, + }; + + struct View { + glm::vec2 size; + }; + + void UpdateImage(dk::Image &image, CMemPool &scratchPool, dk::Device device, dk::Queue transferQueue, int type, int x, int y, int w, int h, const u8 *data) { + /* Do not proceed if no data is provided upfront. */ + if (data == nullptr) { + return; + } + + /* Allocate memory from the pool for the image. */ + const size_t imageSize = type == NVG_TEXTURE_RGBA ? w * h * 4 : w * h; + CMemPool::Handle tempimgmem = scratchPool.allocate(imageSize, DK_IMAGE_LINEAR_STRIDE_ALIGNMENT); + memcpy(tempimgmem.getCpuAddr(), data, imageSize); + + dk::UniqueCmdBuf tempcmdbuf = dk::CmdBufMaker{device}.create(); + CMemPool::Handle tempcmdmem = scratchPool.allocate(DK_MEMBLOCK_ALIGNMENT); + tempcmdbuf.addMemory(tempcmdmem.getMemBlock(), tempcmdmem.getOffset(), tempcmdmem.getSize()); + + dk::ImageView imageView{image}; + tempcmdbuf.copyBufferToImage({ tempimgmem.getGpuAddr() }, imageView, { static_cast(x), static_cast(y), 0, static_cast(w), static_cast(h), 1 }); + + transferQueue.submitCommands(tempcmdbuf.finishList()); + transferQueue.waitIdle(); + + /* Destroy temp mem. */ + tempcmdmem.destroy(); + tempimgmem.destroy(); + } + + } + + Texture::Texture(int id) : m_id(id) { /* ... */ } + + Texture::~Texture() { + m_image_mem.destroy(); + } + + void Texture::Initialize(CMemPool &image_pool, CMemPool &scratch_pool, dk::Device device, dk::Queue queue, int type, int w, int h, int image_flags, const u8 *data) { + m_texture_descriptor = { + .width = w, + .height = h, + .type = type, + .flags = image_flags, + }; + + /* Create an image layout. */ + dk::ImageLayout layout; + auto layout_maker = dk::ImageLayoutMaker{device}.setFlags(0).setDimensions(w, h); + if (type == NVG_TEXTURE_RGBA) { + layout_maker.setFormat(DkImageFormat_RGBA8_Unorm); + } else { + layout_maker.setFormat(DkImageFormat_R8_Unorm); + } + layout_maker.initialize(layout); + + /* Initialize image. */ + m_image_mem = image_pool.allocate(layout.getSize(), layout.getAlignment()); + m_image.initialize(layout, m_image_mem.getMemBlock(), m_image_mem.getOffset()); + m_image_descriptor.initialize(m_image); + + /* Only update the image if the data isn't null. */ + if (data != nullptr) { + UpdateImage(m_image, scratch_pool, device, queue, type, 0, 0, w, h, data); + } + } + + int Texture::GetId() { + return m_id; + } + + const DKNVGtextureDescriptor &Texture::GetDescriptor() { + return m_texture_descriptor; + } + + dk::Image &Texture::GetImage() { + return m_image; + } + + dk::ImageDescriptor &Texture::GetImageDescriptor() { + return m_image_descriptor; + } + + DkRenderer::DkRenderer(unsigned int view_width, unsigned int view_height, dk::Device device, dk::Queue queue, CMemPool &image_mem_pool, CMemPool &code_mem_pool, CMemPool &data_mem_pool) : + m_view_width(view_width), m_view_height(view_height), m_device(device), m_queue(queue), m_image_mem_pool(image_mem_pool), m_code_mem_pool(code_mem_pool), m_data_mem_pool(data_mem_pool), m_image_descriptor_mappings({0}) + { + /* Create a dynamic command buffer and allocate memory for it. */ + m_dyn_cmd_buf = dk::CmdBufMaker{m_device}.create(); + m_dyn_cmd_mem.allocate(m_data_mem_pool, DynamicCmdSize); + + m_image_descriptor_set.allocate(m_data_mem_pool); + m_sampler_descriptor_set.allocate(m_data_mem_pool); + + m_view_uniform_buffer = m_data_mem_pool.allocate(sizeof(View), DK_UNIFORM_BUF_ALIGNMENT); + m_frag_uniform_buffer = m_data_mem_pool.allocate(sizeof(FragmentUniformSize), DK_UNIFORM_BUF_ALIGNMENT); + + /* Create and bind preset samplers. */ + dk::UniqueCmdBuf init_cmd_buf = dk::CmdBufMaker{m_device}.create(); + CMemPool::Handle init_cmd_mem = m_data_mem_pool.allocate(DK_MEMBLOCK_ALIGNMENT); + init_cmd_buf.addMemory(init_cmd_mem.getMemBlock(), init_cmd_mem.getOffset(), init_cmd_mem.getSize()); + + for (u8 i = 0; i < SamplerType_Total; i++) { + const DkFilter filter = (i & SamplerType_Nearest) ? DkFilter_Nearest : DkFilter_Linear; + const DkMipFilter mip_filter = (i & SamplerType_Nearest) ? DkMipFilter_Nearest : DkMipFilter_Linear; + const DkWrapMode u_wrap_mode = (i & SamplerType_RepeatX) ? DkWrapMode_Repeat : DkWrapMode_ClampToEdge; + const DkWrapMode v_wrap_mode = (i & SamplerType_RepeatY) ? DkWrapMode_Repeat : DkWrapMode_ClampToEdge; + + auto sampler = dk::Sampler{}; + auto sampler_descriptor = dk::SamplerDescriptor{}; + sampler.setFilter(filter, filter, (i & SamplerType_MipFilter) ? mip_filter : DkMipFilter_None); + sampler.setWrapMode(u_wrap_mode, v_wrap_mode); + sampler_descriptor.initialize(sampler); + m_sampler_descriptor_set.update(init_cmd_buf, i, sampler_descriptor); + } + + /* Flush the descriptor cache. */ + init_cmd_buf.barrier(DkBarrier_None, DkInvalidateFlags_Descriptors); + + m_sampler_descriptor_set.bindForSamplers(init_cmd_buf); + m_image_descriptor_set.bindForImages(init_cmd_buf); + + m_queue.submitCommands(init_cmd_buf.finishList()); + m_queue.waitIdle(); + + init_cmd_mem.destroy(); + init_cmd_buf.destroy(); + } + + DkRenderer::~DkRenderer() { + if (m_vertex_buffer) { + m_vertex_buffer->destroy(); + } + + m_view_uniform_buffer.destroy(); + m_frag_uniform_buffer.destroy(); + m_textures.clear(); + } + + int DkRenderer::AcquireImageDescriptor(std::shared_ptr texture, int image) { + int free_image_descriptor = m_last_image_descriptor + 1; + int mapping = 0; + + for (int desc = 0; desc <= m_last_image_descriptor; desc++) { + mapping = m_image_descriptor_mappings[desc]; + + /* We've found the image descriptor requested. */ + if (mapping == image) { + return desc; + } + + /* Update the free image descriptor. */ + if (mapping == 0 && free_image_descriptor == m_last_image_descriptor + 1) { + free_image_descriptor = desc; + } + } + + /* No descriptors are free. */ + if (free_image_descriptor >= static_cast(MaxImages)) { + return -1; + } + + /* Update descriptor sets. */ + m_image_descriptor_set.update(m_dyn_cmd_buf, free_image_descriptor, texture->GetImageDescriptor()); + + /* Flush the descriptor cache. */ + m_dyn_cmd_buf.barrier(DkBarrier_None, DkInvalidateFlags_Descriptors); + + /* Update the map. */ + m_image_descriptor_mappings[free_image_descriptor] = image; + m_last_image_descriptor = free_image_descriptor; + return free_image_descriptor; + } + + void DkRenderer::FreeImageDescriptor(int image) { + for (int desc = 0; desc <= m_last_image_descriptor; desc++) { + if (m_image_descriptor_mappings[desc] == image) { + m_image_descriptor_mappings[desc] = 0; + } + } + } + + void DkRenderer::UpdateVertexBuffer(const void *data, size_t size) { + /* Destroy the existing vertex buffer if it is too small. */ + if (m_vertex_buffer && m_vertex_buffer->getSize() < size) { + m_vertex_buffer->destroy(); + m_vertex_buffer.reset(); + } + + /* Create a new buffer if needed. */ + if (!m_vertex_buffer) { + m_vertex_buffer = m_data_mem_pool.allocate(size); + } + + /* Copy data to the vertex buffer if it exists. */ + if (m_vertex_buffer) { + memcpy(m_vertex_buffer->getCpuAddr(), data, size); + } + } + + void DkRenderer::SetUniforms(const DKNVGcontext &ctx, int offset, int image) { + m_dyn_cmd_buf.pushConstants(m_frag_uniform_buffer.getGpuAddr(), m_frag_uniform_buffer.getSize(), 0, ctx.fragSize, ctx.uniforms + offset); + m_dyn_cmd_buf.bindUniformBuffer(DkStage_Fragment, 0, m_frag_uniform_buffer.getGpuAddr(), m_frag_uniform_buffer.getSize()); + + /* Attempt to find a texture. */ + const auto texture = this->FindTexture(image); + if (texture == nullptr) { + return; + } + + /* Acquire an image descriptor. */ + const int image_desc_id = this->AcquireImageDescriptor(texture, image); + if (image_desc_id == -1) { + return; + } + + const int image_flags = texture->GetDescriptor().flags; + uint32_t sampler_id = 0; + + if (image_flags & NVG_IMAGE_GENERATE_MIPMAPS) sampler_id |= SamplerType_MipFilter; + if (image_flags & NVG_IMAGE_NEAREST) sampler_id |= SamplerType_Nearest; + if (image_flags & NVG_IMAGE_REPEATX) sampler_id |= SamplerType_RepeatX; + if (image_flags & NVG_IMAGE_REPEATY) sampler_id |= SamplerType_RepeatY; + + m_dyn_cmd_buf.bindTextures(DkStage_Fragment, 0, dkMakeTextureHandle(image_desc_id, sampler_id)); + } + + void DkRenderer::DrawFill(const DKNVGcontext &ctx, const DKNVGcall &call) { + DKNVGpath *paths = &ctx.paths[call.pathOffset]; + int npaths = call.pathCount; + + /* Set the stencils to be used. */ + m_dyn_cmd_buf.setStencil(DkFace_FrontAndBack, 0xFF, 0x0, 0xFF); + + /* Set the depth stencil state. */ + auto depth_stencil_state = dk::DepthStencilState{} + .setStencilTestEnable(true) + .setStencilFrontCompareOp(DkCompareOp_Always) + .setStencilFrontFailOp(DkStencilOp_Keep) + .setStencilFrontDepthFailOp(DkStencilOp_Keep) + .setStencilFrontPassOp(DkStencilOp_IncrWrap) + .setStencilBackCompareOp(DkCompareOp_Always) + .setStencilBackFailOp(DkStencilOp_Keep) + .setStencilBackDepthFailOp(DkStencilOp_Keep) + .setStencilBackPassOp(DkStencilOp_DecrWrap); + m_dyn_cmd_buf.bindDepthStencilState(depth_stencil_state); + + /* Configure for shape drawing. */ + m_dyn_cmd_buf.bindColorWriteState(dk::ColorWriteState{}.setMask(0, 0)); + this->SetUniforms(ctx, call.uniformOffset, 0); + m_dyn_cmd_buf.bindRasterizerState(dk::RasterizerState{}.setCullMode(DkFace_None)); + + /* Draw vertices. */ + for (int i = 0; i < npaths; i++) { + m_dyn_cmd_buf.draw(DkPrimitive_TriangleFan, paths[i].fillCount, 1, paths[i].fillOffset, 0); + } + + m_dyn_cmd_buf.bindColorWriteState(dk::ColorWriteState{}); + this->SetUniforms(ctx, call.uniformOffset + ctx.fragSize, call.image); + m_dyn_cmd_buf.bindRasterizerState(dk::RasterizerState{}); + + if (ctx.flags & NVG_ANTIALIAS) { + /* Configure stencil anti-aliasing. */ + depth_stencil_state + .setStencilFrontCompareOp(DkCompareOp_Equal) + .setStencilFrontFailOp(DkStencilOp_Keep) + .setStencilFrontDepthFailOp(DkStencilOp_Keep) + .setStencilFrontPassOp(DkStencilOp_Keep) + .setStencilBackCompareOp(DkCompareOp_Equal) + .setStencilBackFailOp(DkStencilOp_Keep) + .setStencilBackDepthFailOp(DkStencilOp_Keep) + .setStencilBackPassOp(DkStencilOp_Keep); + m_dyn_cmd_buf.bindDepthStencilState(depth_stencil_state); + + /* Draw fringes. */ + for (int i = 0; i < npaths; i++) { + m_dyn_cmd_buf.draw(DkPrimitive_TriangleStrip, paths[i].strokeCount, 1, paths[i].strokeOffset, 0); + } + } + + /* Configure and draw fill. */ + depth_stencil_state + .setStencilFrontCompareOp(DkCompareOp_NotEqual) + .setStencilFrontFailOp(DkStencilOp_Zero) + .setStencilFrontDepthFailOp(DkStencilOp_Zero) + .setStencilFrontPassOp(DkStencilOp_Zero) + .setStencilBackCompareOp(DkCompareOp_NotEqual) + .setStencilBackFailOp(DkStencilOp_Zero) + .setStencilBackDepthFailOp(DkStencilOp_Zero) + .setStencilBackPassOp(DkStencilOp_Zero); + m_dyn_cmd_buf.bindDepthStencilState(depth_stencil_state); + + m_dyn_cmd_buf.draw(DkPrimitive_TriangleStrip, call.triangleCount, 1, call.triangleOffset, 0); + + /* Reset the depth stencil state to default. */ + m_dyn_cmd_buf.bindDepthStencilState(dk::DepthStencilState{}); + } + + void DkRenderer::DrawConvexFill(const DKNVGcontext &ctx, const DKNVGcall &call) { + DKNVGpath *paths = &ctx.paths[call.pathOffset]; + int npaths = call.pathCount; + + this->SetUniforms(ctx, call.uniformOffset, call.image); + + for (int i = 0; i < npaths; i++) { + m_dyn_cmd_buf.draw(DkPrimitive_TriangleFan, paths[i].fillCount, 1, paths[i].fillOffset, 0); + + /* Draw fringes. */ + if (paths[i].strokeCount > 0) { + m_dyn_cmd_buf.draw(DkPrimitive_TriangleStrip, paths[i].strokeCount, 1, paths[i].strokeOffset, 0); + } + } + } + + void DkRenderer::DrawStroke(const DKNVGcontext &ctx, const DKNVGcall &call) { + DKNVGpath* paths = &ctx.paths[call.pathOffset]; + int npaths = call.pathCount; + + if (ctx.flags & NVG_STENCIL_STROKES) { + /* Set the stencil to be used. */ + m_dyn_cmd_buf.setStencil(DkFace_Front, 0xFF, 0x0, 0xFF); + + /* Configure for filling the stroke base without overlap. */ + auto depth_stencil_state = dk::DepthStencilState{} + .setStencilTestEnable(true) + .setStencilFrontCompareOp(DkCompareOp_Equal) + .setStencilFrontFailOp(DkStencilOp_Keep) + .setStencilFrontDepthFailOp(DkStencilOp_Keep) + .setStencilFrontPassOp(DkStencilOp_Incr); + m_dyn_cmd_buf.bindDepthStencilState(depth_stencil_state); + this->SetUniforms(ctx, call.uniformOffset + ctx.fragSize, call.image); + + /* Draw vertices. */ + for (int i = 0; i < npaths; i++) { + m_dyn_cmd_buf.draw(DkPrimitive_TriangleStrip, paths[i].strokeCount, 1, paths[i].strokeOffset, 0); + } + + /* Configure for drawing anti-aliased pixels. */ + depth_stencil_state.setStencilFrontPassOp(DkStencilOp_Keep); + m_dyn_cmd_buf.bindDepthStencilState(depth_stencil_state); + this->SetUniforms(ctx, call.uniformOffset, call.image); + + /* Draw vertices. */ + for (int i = 0; i < npaths; i++) { + m_dyn_cmd_buf.draw(DkPrimitive_TriangleStrip, paths[i].strokeCount, 1, paths[i].strokeOffset, 0); + } + + /* Configure for clearing the stencil buffer. */ + depth_stencil_state + .setStencilTestEnable(true) + .setStencilFrontCompareOp(DkCompareOp_Always) + .setStencilFrontFailOp(DkStencilOp_Zero) + .setStencilFrontDepthFailOp(DkStencilOp_Zero) + .setStencilFrontPassOp(DkStencilOp_Zero); + m_dyn_cmd_buf.bindDepthStencilState(depth_stencil_state); + + /* Draw vertices. */ + for (int i = 0; i < npaths; i++) { + m_dyn_cmd_buf.draw(DkPrimitive_TriangleStrip, paths[i].strokeCount, 1, paths[i].strokeOffset, 0); + } + + /* Reset the depth stencil state to default. */ + m_dyn_cmd_buf.bindDepthStencilState(dk::DepthStencilState{}); + } else { + this->SetUniforms(ctx, call.uniformOffset, call.image); + + /* Draw vertices. */ + for (int i = 0; i < npaths; i++) { + m_dyn_cmd_buf.draw(DkPrimitive_TriangleStrip, paths[i].strokeCount, 1, paths[i].strokeOffset, 0); + } + } + } + + void DkRenderer::DrawTriangles(const DKNVGcontext &ctx, const DKNVGcall &call) { + this->SetUniforms(ctx, call.uniformOffset, call.image); + m_dyn_cmd_buf.draw(DkPrimitive_Triangles, call.triangleCount, 1, call.triangleOffset, 0); + } + + int DkRenderer::Create(DKNVGcontext &ctx) { + m_vertex_shader.load(m_code_mem_pool, "romfs:/shaders/fill_vsh.dksh"); + + /* Load the appropriate fragment shader depending on whether AA is enabled. */ + if (ctx.flags & NVG_ANTIALIAS) { + m_fragment_shader.load(m_code_mem_pool, "romfs:/shaders/fill_aa_fsh.dksh"); + } else { + m_fragment_shader.load(m_code_mem_pool, "romfs:/shaders/fill_fsh.dksh"); + } + + /* Set the size of fragment uniforms. */ + ctx.fragSize = FragmentUniformSize; + return 1; + } + + std::shared_ptr DkRenderer::FindTexture(int id) { + for (auto it = m_textures.begin(); it != m_textures.end(); it++) { + if ((*it)->GetId() == id) { + return *it; + } + } + + return nullptr; + } + + int DkRenderer::CreateTexture(const DKNVGcontext &ctx, int type, int w, int h, int image_flags, const unsigned char* data) { + const auto texture_id = m_next_texture_id++; + auto texture = std::make_shared(texture_id); + texture->Initialize(m_image_mem_pool, m_data_mem_pool, m_device, m_queue, type, w, h, image_flags, data); + m_textures.push_back(texture); + return texture->GetId(); + } + + int DkRenderer::DeleteTexture(const DKNVGcontext &ctx, int image) { + bool found = false; + + for (auto it = m_textures.begin(); it != m_textures.end();) { + /* Remove textures with the given id. */ + if ((*it)->GetId() == image) { + it = m_textures.erase(it); + found = true; + } else { + ++it; + } + } + + /* Free any used image descriptors. */ + this->FreeImageDescriptor(image); + return found; + } + + int DkRenderer::UpdateTexture(const DKNVGcontext &ctx, int image, int x, int y, int w, int h, const unsigned char *data) { + const std::shared_ptr texture = this->FindTexture(image); + + /* Could not find a texture. */ + if (texture == nullptr) { + return 0; + } + + const DKNVGtextureDescriptor &tex_desc = texture->GetDescriptor(); + if (tex_desc.type == NVG_TEXTURE_RGBA) { + data += y * tex_desc.width*4; + } else { + data += y * tex_desc.width; + } + x = 0; + w = tex_desc.width; + + UpdateImage(texture->GetImage(), m_data_mem_pool, m_device, m_queue, tex_desc.type, x, y, w, h, data); + return 1; + } + + int DkRenderer::GetTextureSize(const DKNVGcontext &ctx, int image, int *w, int *h) { + const auto descriptor = this->GetTextureDescriptor(ctx, image); + if (descriptor == nullptr) { + return 0; + } + + *w = descriptor->width; + *h = descriptor->height; + return 1; + } + + const DKNVGtextureDescriptor *DkRenderer::GetTextureDescriptor(const DKNVGcontext &ctx, int id) { + for (auto it = m_textures.begin(); it != m_textures.end(); it++) { + if ((*it)->GetId() == id) { + return &(*it)->GetDescriptor(); + } + } + + return nullptr; + } + + void DkRenderer::Flush(DKNVGcontext &ctx) { + if (ctx.ncalls > 0) { + /* Prepare dynamic command buffer. */ + m_dyn_cmd_mem.begin(m_dyn_cmd_buf); + + /* Update buffers with data. */ + this->UpdateVertexBuffer(ctx.verts, ctx.nverts * sizeof(NVGvertex)); + + /* Enable blending. */ + m_dyn_cmd_buf.bindColorState(dk::ColorState{}.setBlendEnable(0, true)); + + /* Setup. */ + m_dyn_cmd_buf.bindShaders(DkStageFlag_GraphicsMask, { m_vertex_shader, m_fragment_shader }); + m_dyn_cmd_buf.bindVtxAttribState(VertexAttribState); + m_dyn_cmd_buf.bindVtxBufferState(VertexBufferState); + m_dyn_cmd_buf.bindVtxBuffer(0, m_vertex_buffer->getGpuAddr(), m_vertex_buffer->getSize()); + + /* Push the view size to the uniform buffer and bind it. */ + const auto view = View{glm::vec2{m_view_width, m_view_height}}; + m_dyn_cmd_buf.pushConstants(m_view_uniform_buffer.getGpuAddr(), m_view_uniform_buffer.getSize(), 0, sizeof(view), &view); + m_dyn_cmd_buf.bindUniformBuffer(DkStage_Vertex, 0, m_view_uniform_buffer.getGpuAddr(), m_view_uniform_buffer.getSize()); + + /* Iterate over calls. */ + for (int i = 0; i < ctx.ncalls; i++) { + const DKNVGcall &call = ctx.calls[i]; + + /* Perform blending. */ + m_dyn_cmd_buf.bindBlendStates(0, { dk::BlendState{}.setFactors(static_cast(call.blendFunc.srcRGB), static_cast(call.blendFunc.dstRGB), static_cast(call.blendFunc.srcAlpha), static_cast(call.blendFunc.dstRGB)) }); + + if (call.type == DKNVG_FILL) { + this->DrawFill(ctx, call); + } else if (call.type == DKNVG_CONVEXFILL) { + this->DrawConvexFill(ctx, call); + } else if (call.type == DKNVG_STROKE) { + this->DrawStroke(ctx, call); + } else if (call.type == DKNVG_TRIANGLES) { + this->DrawTriangles(ctx, call); + } + } + + m_queue.submitCommands(m_dyn_cmd_mem.end(m_dyn_cmd_buf)); + } + + /* Reset calls. */ + ctx.nverts = 0; + ctx.npaths = 0; + ctx.ncalls = 0; + ctx.nuniforms = 0; + } + +} \ No newline at end of file diff --git a/troposphere/daybreak/nanovg/source/framework/CApplication.cpp b/troposphere/daybreak/nanovg/source/framework/CApplication.cpp new file mode 100644 index 000000000..34786a3d8 --- /dev/null +++ b/troposphere/daybreak/nanovg/source/framework/CApplication.cpp @@ -0,0 +1,69 @@ +/* +** Sample Framework for deko3d Applications +** CApplication.cpp: Wrapper class containing common application boilerplate +*/ +#include "CApplication.h" + +CApplication::CApplication() +{ + appletLockExit(); + appletSetFocusHandlingMode(AppletFocusHandlingMode_NoSuspend); +} + +CApplication::~CApplication() +{ + appletSetFocusHandlingMode(AppletFocusHandlingMode_SuspendHomeSleep); + appletUnlockExit(); +} + +void CApplication::run() +{ + u64 tick_ref = armGetSystemTick(); + u64 tick_saved = tick_ref; + bool focused = appletGetFocusState() == AppletFocusState_Focused; + + onOperationMode(appletGetOperationMode()); + + for (;;) + { + u32 msg = 0; + Result rc = appletGetMessage(&msg); + if (R_SUCCEEDED(rc)) + { + bool should_close = !appletProcessMessage(msg); + if (should_close) + return; + + switch (msg) + { + case AppletMessage_FocusStateChanged: + { + bool old_focused = focused; + AppletFocusState state = appletGetFocusState(); + focused = state == AppletFocusState_Focused; + + onFocusState(state); + if (focused == old_focused) + break; + if (focused) + { + appletSetFocusHandlingMode(AppletFocusHandlingMode_NoSuspend); + tick_ref += armGetSystemTick() - tick_saved; + } + else + { + tick_saved = armGetSystemTick(); + appletSetFocusHandlingMode(AppletFocusHandlingMode_SuspendHomeSleepNotify); + } + break; + } + case AppletMessage_OperationModeChanged: + onOperationMode(appletGetOperationMode()); + break; + } + } + + if (focused && !onFrame(armTicksToNs(armGetSystemTick() - tick_ref))) + break; + } +} diff --git a/troposphere/daybreak/nanovg/source/framework/CExternalImage.cpp b/troposphere/daybreak/nanovg/source/framework/CExternalImage.cpp new file mode 100644 index 000000000..37b6a26b0 --- /dev/null +++ b/troposphere/daybreak/nanovg/source/framework/CExternalImage.cpp @@ -0,0 +1,37 @@ +/* +** Sample Framework for deko3d Applications +** CExternalImage.cpp: Utility class for loading images from the filesystem +*/ +#include "CExternalImage.h" +#include "FileLoader.h" + +bool CExternalImage::load(CMemPool& imagePool, CMemPool& scratchPool, dk::Device device, dk::Queue transferQueue, const char* path, uint32_t width, uint32_t height, DkImageFormat format, uint32_t flags) +{ + CMemPool::Handle tempimgmem = LoadFile(scratchPool, path, DK_IMAGE_LINEAR_STRIDE_ALIGNMENT); + if (!tempimgmem) + return false; + + dk::UniqueCmdBuf tempcmdbuf = dk::CmdBufMaker{device}.create(); + CMemPool::Handle tempcmdmem = scratchPool.allocate(DK_MEMBLOCK_ALIGNMENT); + tempcmdbuf.addMemory(tempcmdmem.getMemBlock(), tempcmdmem.getOffset(), tempcmdmem.getSize()); + + dk::ImageLayout layout; + dk::ImageLayoutMaker{device} + .setFlags(flags) + .setFormat(format) + .setDimensions(width, height) + .initialize(layout); + + m_mem = imagePool.allocate(layout.getSize(), layout.getAlignment()); + m_image.initialize(layout, m_mem.getMemBlock(), m_mem.getOffset()); + m_descriptor.initialize(m_image); + + dk::ImageView imageView{m_image}; + tempcmdbuf.copyBufferToImage({ tempimgmem.getGpuAddr() }, imageView, { 0, 0, 0, width, height, 1 }); + transferQueue.submitCommands(tempcmdbuf.finishList()); + transferQueue.waitIdle(); + + tempcmdmem.destroy(); + tempimgmem.destroy(); + return true; +} diff --git a/troposphere/daybreak/nanovg/source/framework/CIntrusiveTree.cpp b/troposphere/daybreak/nanovg/source/framework/CIntrusiveTree.cpp new file mode 100644 index 000000000..9f21b63db --- /dev/null +++ b/troposphere/daybreak/nanovg/source/framework/CIntrusiveTree.cpp @@ -0,0 +1,214 @@ +/* +** Sample Framework for deko3d Applications +** CIntrusiveTree.cpp: Intrusive red-black tree helper class +*/ +#include "CIntrusiveTree.h" + +// This red-black tree implementation is mostly based on mtheall's work, +// which can be found here: +// https://github.com/smealum/ctrulib/tree/master/libctru/source/util/rbtree + +void CIntrusiveTreeBase::rotate(N* node, N::Leaf leaf) +{ + N *tmp = node->child(leaf); + N *parent = node->getParent(); + + node->child(leaf) = tmp->child(!leaf); + if (tmp->child(!leaf)) + tmp->child(!leaf)->setParent(node); + + tmp->child(!leaf) = node; + tmp->setParent(parent); + + if (parent) + { + if (node == parent->child(!leaf)) + parent->child(!leaf) = tmp; + else + parent->child(leaf) = tmp; + } + else + m_root = tmp; + + node->setParent(tmp); +} + +void CIntrusiveTreeBase::recolor(N* parent, N* node) +{ + N *sibling; + + while ((!node || node->isBlack()) && node != m_root) + { + N::Leaf leaf = node == parent->left() ? N::Right : N::Left; + sibling = parent->child(leaf); + + if (sibling->isRed()) + { + sibling->setBlack(); + parent->setRed(); + rotate(parent, leaf); + sibling = parent->child(leaf); + } + + N::Color clr[2]; + clr[N::Left] = sibling->left() ? sibling->left()->getColor() : N::Black; + clr[N::Right] = sibling->right() ? sibling->right()->getColor() : N::Black; + + if (clr[N::Left] == N::Black && clr[N::Right] == N::Black) + { + sibling->setRed(); + node = parent; + parent = node->getParent(); + } + else + { + if (clr[leaf] == N::Black) + { + sibling->child(!leaf)->setBlack(); + sibling->setRed(); + rotate(sibling, !leaf); + sibling = parent->child(leaf); + } + + sibling->setColor(parent->getColor()); + parent->setBlack(); + sibling->child(leaf)->setBlack(); + rotate(parent, leaf); + + node = m_root; + } + } + + if (node) + node->setBlack(); +} + +auto CIntrusiveTreeBase::walk(N* node, N::Leaf leaf) const -> N* +{ + if (node->child(leaf)) + { + node = node->child(leaf); + while (node->child(!leaf)) + node = node->child(!leaf); + } + else + { + N *parent = node->getParent(); + while (parent && node == parent->child(leaf)) + { + node = parent; + parent = node->getParent(); + } + node = parent; + } + + return node; +} + +void CIntrusiveTreeBase::insert(N* node, N* parent) +{ + node->left() = node->right() = nullptr; + node->setParent(parent); + node->setRed(); + + while ((parent = node->getParent()) && parent->isRed()) + { + N *grandparent = parent->getParent(); + N::Leaf leaf = parent == grandparent->left() ? N::Right : N::Left; + N *uncle = grandparent->child(leaf); + + if (uncle && uncle->isRed()) + { + uncle->setBlack(); + parent->setBlack(); + grandparent->setRed(); + + node = grandparent; + } + else + { + if (parent->child(leaf) == node) + { + rotate(parent, leaf); + + N* tmp = parent; + parent = node; + node = tmp; + } + + parent->setBlack(); + grandparent->setRed(); + rotate(grandparent, !leaf); + } + } + + m_root->setBlack(); +} + +void CIntrusiveTreeBase::remove(N* node) +{ + N::Color color; + N *child, *parent; + + if (node->left() && node->right()) + { + N *old = node; + + node = node->right(); + while (node->left()) + node = node->left(); + + parent = old->getParent(); + if (parent) + { + if (parent->left() == old) + parent->left() = node; + else + parent->right() = node; + } + else + m_root = node; + + child = node->right(); + parent = node->getParent(); + color = node->getColor(); + + if (parent == old) + parent = node; + else + { + if (child) + child->setParent(parent); + parent->left() = child; + + node->right() = old->right(); + old->right()->setParent(node); + } + + node->setParent(old->getParent()); + node->setColor(old->getColor()); + node->left() = old->left(); + old->left()->setParent(node); + } + else + { + child = node->left() ? node->right() : node->left(); + parent = node->getParent(); + color = node->getColor(); + + if (child) + child->setParent(parent); + if (parent) + { + if (parent->left() == node) + parent->left() = child; + else + parent->right() = child; + } + else + m_root = child; + } + + if (color == N::Black) + recolor(parent, child); +} diff --git a/troposphere/daybreak/nanovg/source/framework/CMemPool.cpp b/troposphere/daybreak/nanovg/source/framework/CMemPool.cpp new file mode 100644 index 000000000..fb3bd10ce --- /dev/null +++ b/troposphere/daybreak/nanovg/source/framework/CMemPool.cpp @@ -0,0 +1,175 @@ +/* +** Sample Framework for deko3d Applications +** CMemPool.cpp: Pooled dynamic memory allocation manager class +*/ +#include "CMemPool.h" + +inline auto CMemPool::_newSlice() -> Slice* +{ + Slice* ret = m_sliceHeap.pop(); + if (!ret) ret = (Slice*)::malloc(sizeof(Slice)); + return ret; +} + +inline void CMemPool::_deleteSlice(Slice* s) +{ + if (!s) return; + m_sliceHeap.add(s); +} + +CMemPool::~CMemPool() +{ + m_memMap.iterate([](Slice* s) { ::free(s); }); + m_sliceHeap.iterate([](Slice* s) { ::free(s); }); + m_blocks.iterate([](Block* blk) { + blk->m_obj.destroy(); + ::free(blk); + }); +} + +auto CMemPool::allocate(uint32_t size, uint32_t alignment) -> Handle +{ + if (!size) return nullptr; + if (alignment & (alignment - 1)) return nullptr; + size = (size + alignment - 1) &~ (alignment - 1); +#ifdef DEBUG_CMEMPOOL + printf("Allocating size=%u alignment=0x%x\n", size, alignment); + { + Slice* temp = /*m_freeList*/m_memMap.first(); + while (temp) + { + printf("-- blk %p | 0x%08x-0x%08x | %s used\n", temp->m_block, temp->m_start, temp->m_end, temp->m_pool ? " " : "not"); + temp = /*m_freeList*/m_memMap.next(temp); + } + } +#endif + + uint32_t start_offset = 0; + uint32_t end_offset = 0; + Slice* slice = m_freeList.find(size, decltype(m_freeList)::LowerBound); + while (slice) + { +#ifdef DEBUG_CMEMPOOL + printf(" * Checking slice 0x%x - 0x%x\n", slice->m_start, slice->m_end); +#endif + start_offset = (slice->m_start + alignment - 1) &~ (alignment - 1); + end_offset = start_offset + size; + if (end_offset <= slice->m_end) + break; + slice = m_freeList.next(slice); + } + + if (!slice) + { + Block* blk = (Block*)::malloc(sizeof(Block)); + if (!blk) + return nullptr; + + uint32_t unusableSize = (m_flags & DkMemBlockFlags_Code) ? DK_SHADER_CODE_UNUSABLE_SIZE : 0; + uint32_t blkSize = m_blockSize - unusableSize; + blkSize = size > blkSize ? size : blkSize; + blkSize = (blkSize + unusableSize + DK_MEMBLOCK_ALIGNMENT - 1) &~ (DK_MEMBLOCK_ALIGNMENT - 1); +#ifdef DEBUG_CMEMPOOL + printf(" ! Allocating block of size 0x%x\n", blkSize); +#endif + blk->m_obj = dk::MemBlockMaker{m_dev, blkSize}.setFlags(m_flags).create(); + if (!blk->m_obj) + { + ::free(blk); + return nullptr; + } + + slice = _newSlice(); + if (!slice) + { + blk->m_obj.destroy(); + ::free(blk); + return nullptr; + } + + slice->m_pool = nullptr; + slice->m_block = blk; + slice->m_start = 0; + slice->m_end = blkSize - unusableSize; + m_memMap.add(slice); + + blk->m_cpuAddr = blk->m_obj.getCpuAddr(); + blk->m_gpuAddr = blk->m_obj.getGpuAddr(); + m_blocks.add(blk); + + start_offset = 0; + end_offset = size; + } + else + { +#ifdef DEBUG_CMEMPOOL + printf(" * found it\n"); +#endif + m_freeList.remove(slice); + } + + if (start_offset != slice->m_start) + { + Slice* t = _newSlice(); + if (!t) goto _bad; + t->m_pool = nullptr; + t->m_block = slice->m_block; + t->m_start = slice->m_start; + t->m_end = start_offset; +#ifdef DEBUG_CMEMPOOL + printf("-> subdivide left: %08x-%08x\n", t->m_start, t->m_end); +#endif + m_memMap.addBefore(slice, t); + m_freeList.insert(t, true); + slice->m_start = start_offset; + } + + if (end_offset != slice->m_end) + { + Slice* t = _newSlice(); + if (!t) goto _bad; + t->m_pool = nullptr; + t->m_block = slice->m_block; + t->m_start = end_offset; + t->m_end = slice->m_end; +#ifdef DEBUG_CMEMPOOL + printf("-> subdivide right: %08x-%08x\n", t->m_start, t->m_end); +#endif + m_memMap.addAfter(slice, t); + m_freeList.insert(t, true); + slice->m_end = end_offset; + } + + slice->m_pool = this; + return slice; + +_bad: + m_freeList.insert(slice, true); + return nullptr; +} + +void CMemPool::_destroy(Slice* slice) +{ + slice->m_pool = nullptr; + + Slice* left = m_memMap.prev(slice); + Slice* right = m_memMap.next(slice); + + if (left && left->canCoalesce(*slice)) + { + slice->m_start = left->m_start; + m_freeList.remove(left); + m_memMap.remove(left); + _deleteSlice(left); + } + + if (right && slice->canCoalesce(*right)) + { + slice->m_end = right->m_end; + m_freeList.remove(right); + m_memMap.remove(right); + _deleteSlice(right); + } + + m_freeList.insert(slice, true); +} diff --git a/troposphere/daybreak/nanovg/source/framework/CShader.cpp b/troposphere/daybreak/nanovg/source/framework/CShader.cpp new file mode 100644 index 000000000..6c5361c24 --- /dev/null +++ b/troposphere/daybreak/nanovg/source/framework/CShader.cpp @@ -0,0 +1,62 @@ +/* +** Sample Framework for deko3d Applications +** CShader.cpp: Utility class for loading shaders from the filesystem +*/ +#include "CShader.h" + +struct DkshHeader +{ + uint32_t magic; // DKSH_MAGIC + uint32_t header_sz; // sizeof(DkshHeader) + uint32_t control_sz; + uint32_t code_sz; + uint32_t programs_off; + uint32_t num_programs; +}; + +bool CShader::load(CMemPool& pool, const char* path) +{ + FILE* f; + DkshHeader hdr; + void* ctrlmem; + + m_codemem.destroy(); + + f = fopen(path, "rb"); + if (!f) return false; + + if (!fread(&hdr, sizeof(hdr), 1, f)) + goto _fail0; + + ctrlmem = malloc(hdr.control_sz); + if (!ctrlmem) + goto _fail0; + + rewind(f); + if (!fread(ctrlmem, hdr.control_sz, 1, f)) + goto _fail1; + + m_codemem = pool.allocate(hdr.code_sz, DK_SHADER_CODE_ALIGNMENT); + if (!m_codemem) + goto _fail1; + + if (!fread(m_codemem.getCpuAddr(), hdr.code_sz, 1, f)) + goto _fail2; + + dk::ShaderMaker{m_codemem.getMemBlock(), m_codemem.getOffset()} + .setControl(ctrlmem) + .setProgramId(0) + .initialize(m_shader); + + free(ctrlmem); + fclose(f); + return true; + +_fail2: + m_codemem.destroy(); +_fail1: + free(ctrlmem); +_fail0: + fclose(f); + return false; +} diff --git a/troposphere/daybreak/nanovg/source/framework/FileLoader.cpp b/troposphere/daybreak/nanovg/source/framework/FileLoader.cpp new file mode 100644 index 000000000..a9651bf95 --- /dev/null +++ b/troposphere/daybreak/nanovg/source/framework/FileLoader.cpp @@ -0,0 +1,27 @@ +/* +** Sample Framework for deko3d Applications +** FileLoader.cpp: Helpers for loading data from the filesystem directly into GPU memory +*/ +#include "FileLoader.h" + +CMemPool::Handle LoadFile(CMemPool& pool, const char* path, uint32_t alignment) +{ + FILE *f = fopen(path, "rb"); + if (!f) return nullptr; + + fseek(f, 0, SEEK_END); + uint32_t fsize = ftell(f); + rewind(f); + + CMemPool::Handle mem = pool.allocate(fsize, alignment); + if (!mem) + { + fclose(f); + return nullptr; + } + + fread(mem.getCpuAddr(), fsize, 1, f); + fclose(f); + + return mem; +} diff --git a/troposphere/daybreak/nanovg/source/framework/LICENSE b/troposphere/daybreak/nanovg/source/framework/LICENSE new file mode 100644 index 000000000..183debc3e --- /dev/null +++ b/troposphere/daybreak/nanovg/source/framework/LICENSE @@ -0,0 +1,18 @@ +Copyright (C) 2020 fincs + +This software is provided 'as-is', without any express or implied +warranty. In no event will the authors be held liable for any +damages arising from the use of this software. + +Permission is granted to anyone to use this software for any +purpose, including commercial applications, and to alter it and +redistribute it freely, subject to the following restrictions: + +1. The origin of this software must not be misrepresented; you + must not claim that you wrote the original software. If you use + this software in a product, an acknowledgment in the product + documentation would be appreciated but is not required. +2. Altered source versions must be plainly marked as such, and + must not be misrepresented as being the original software. +3. This notice may not be removed or altered from any source + distribution. diff --git a/troposphere/daybreak/nanovg/source/nanovg.c b/troposphere/daybreak/nanovg/source/nanovg.c new file mode 100644 index 000000000..aa863547b --- /dev/null +++ b/troposphere/daybreak/nanovg/source/nanovg.c @@ -0,0 +1,2926 @@ +// +// Copyright (c) 2013 Mikko Mononen memon@inside.org +// +// This software is provided 'as-is', without any express or implied +// warranty. In no event will the authors be held liable for any damages +// arising from the use of this software. +// Permission is granted to anyone to use this software for any purpose, +// including commercial applications, and to alter it and redistribute it +// freely, subject to the following restrictions: +// 1. The origin of this software must not be misrepresented; you must not +// claim that you wrote the original software. If you use this software +// in a product, an acknowledgment in the product documentation would be +// appreciated but is not required. +// 2. Altered source versions must be plainly marked as such, and must not be +// misrepresented as being the original software. +// 3. This notice may not be removed or altered from any source distribution. +// + +#include +#include +#include +#include + +#include "nanovg.h" +#define FONTSTASH_IMPLEMENTATION +#include "fontstash.h" +#define STB_IMAGE_IMPLEMENTATION +#include "stb_image.h" + +#ifdef _MSC_VER +#pragma warning(disable: 4100) // unreferenced formal parameter +#pragma warning(disable: 4127) // conditional expression is constant +#pragma warning(disable: 4204) // nonstandard extension used : non-constant aggregate initializer +#pragma warning(disable: 4706) // assignment within conditional expression +#endif + +#define NVG_INIT_FONTIMAGE_SIZE 512 +#define NVG_MAX_FONTIMAGE_SIZE 2048 +#define NVG_MAX_FONTIMAGES 4 + +#define NVG_INIT_COMMANDS_SIZE 256 +#define NVG_INIT_POINTS_SIZE 128 +#define NVG_INIT_PATHS_SIZE 16 +#define NVG_INIT_VERTS_SIZE 256 +#define NVG_MAX_STATES 32 + +#define NVG_KAPPA90 0.5522847493f // Length proportional to radius of a cubic bezier handle for 90deg arcs. + +#define NVG_COUNTOF(arr) (sizeof(arr) / sizeof(0[arr])) + + +enum NVGcommands { + NVG_MOVETO = 0, + NVG_LINETO = 1, + NVG_BEZIERTO = 2, + NVG_CLOSE = 3, + NVG_WINDING = 4, +}; + +enum NVGpointFlags +{ + NVG_PT_CORNER = 0x01, + NVG_PT_LEFT = 0x02, + NVG_PT_BEVEL = 0x04, + NVG_PR_INNERBEVEL = 0x08, +}; + +struct NVGstate { + NVGcompositeOperationState compositeOperation; + int shapeAntiAlias; + NVGpaint fill; + NVGpaint stroke; + float strokeWidth; + float miterLimit; + int lineJoin; + int lineCap; + float alpha; + float xform[6]; + NVGscissor scissor; + float fontSize; + float letterSpacing; + float lineHeight; + float fontBlur; + int textAlign; + int fontId; +}; +typedef struct NVGstate NVGstate; + +struct NVGpoint { + float x,y; + float dx, dy; + float len; + float dmx, dmy; + unsigned char flags; +}; +typedef struct NVGpoint NVGpoint; + +struct NVGpathCache { + NVGpoint* points; + int npoints; + int cpoints; + NVGpath* paths; + int npaths; + int cpaths; + NVGvertex* verts; + int nverts; + int cverts; + float bounds[4]; +}; +typedef struct NVGpathCache NVGpathCache; + +struct NVGcontext { + NVGparams params; + float* commands; + int ccommands; + int ncommands; + float commandx, commandy; + NVGstate states[NVG_MAX_STATES]; + int nstates; + NVGpathCache* cache; + float tessTol; + float distTol; + float fringeWidth; + float devicePxRatio; + struct FONScontext* fs; + int fontImages[NVG_MAX_FONTIMAGES]; + int fontImageIdx; + int drawCallCount; + int fillTriCount; + int strokeTriCount; + int textTriCount; +}; + +static float nvg__sqrtf(float a) { return sqrtf(a); } +static float nvg__modf(float a, float b) { return fmodf(a, b); } +static float nvg__sinf(float a) { return sinf(a); } +static float nvg__cosf(float a) { return cosf(a); } +static float nvg__tanf(float a) { return tanf(a); } +static float nvg__atan2f(float a,float b) { return atan2f(a, b); } +static float nvg__acosf(float a) { return acosf(a); } + +static int nvg__mini(int a, int b) { return a < b ? a : b; } +static int nvg__maxi(int a, int b) { return a > b ? a : b; } +static int nvg__clampi(int a, int mn, int mx) { return a < mn ? mn : (a > mx ? mx : a); } +static float nvg__minf(float a, float b) { return a < b ? a : b; } +static float nvg__maxf(float a, float b) { return a > b ? a : b; } +static float nvg__absf(float a) { return a >= 0.0f ? a : -a; } +static float nvg__signf(float a) { return a >= 0.0f ? 1.0f : -1.0f; } +static float nvg__clampf(float a, float mn, float mx) { return a < mn ? mn : (a > mx ? mx : a); } +static float nvg__cross(float dx0, float dy0, float dx1, float dy1) { return dx1*dy0 - dx0*dy1; } + +static float nvg__normalize(float *x, float* y) +{ + float d = nvg__sqrtf((*x)*(*x) + (*y)*(*y)); + if (d > 1e-6f) { + float id = 1.0f / d; + *x *= id; + *y *= id; + } + return d; +} + + +static void nvg__deletePathCache(NVGpathCache* c) +{ + if (c == NULL) return; + if (c->points != NULL) free(c->points); + if (c->paths != NULL) free(c->paths); + if (c->verts != NULL) free(c->verts); + free(c); +} + +static NVGpathCache* nvg__allocPathCache(void) +{ + NVGpathCache* c = (NVGpathCache*)malloc(sizeof(NVGpathCache)); + if (c == NULL) goto error; + memset(c, 0, sizeof(NVGpathCache)); + + c->points = (NVGpoint*)malloc(sizeof(NVGpoint)*NVG_INIT_POINTS_SIZE); + if (!c->points) goto error; + c->npoints = 0; + c->cpoints = NVG_INIT_POINTS_SIZE; + + c->paths = (NVGpath*)malloc(sizeof(NVGpath)*NVG_INIT_PATHS_SIZE); + if (!c->paths) goto error; + c->npaths = 0; + c->cpaths = NVG_INIT_PATHS_SIZE; + + c->verts = (NVGvertex*)malloc(sizeof(NVGvertex)*NVG_INIT_VERTS_SIZE); + if (!c->verts) goto error; + c->nverts = 0; + c->cverts = NVG_INIT_VERTS_SIZE; + + return c; +error: + nvg__deletePathCache(c); + return NULL; +} + +static void nvg__setDevicePixelRatio(NVGcontext* ctx, float ratio) +{ + ctx->tessTol = 0.25f / ratio; + ctx->distTol = 0.01f / ratio; + ctx->fringeWidth = 1.0f / ratio; + ctx->devicePxRatio = ratio; +} + +static NVGcompositeOperationState nvg__compositeOperationState(int op) +{ + int sfactor, dfactor; + + if (op == NVG_SOURCE_OVER) + { + sfactor = NVG_ONE; + dfactor = NVG_ONE_MINUS_SRC_ALPHA; + } + else if (op == NVG_SOURCE_IN) + { + sfactor = NVG_DST_ALPHA; + dfactor = NVG_ZERO; + } + else if (op == NVG_SOURCE_OUT) + { + sfactor = NVG_ONE_MINUS_DST_ALPHA; + dfactor = NVG_ZERO; + } + else if (op == NVG_ATOP) + { + sfactor = NVG_DST_ALPHA; + dfactor = NVG_ONE_MINUS_SRC_ALPHA; + } + else if (op == NVG_DESTINATION_OVER) + { + sfactor = NVG_ONE_MINUS_DST_ALPHA; + dfactor = NVG_ONE; + } + else if (op == NVG_DESTINATION_IN) + { + sfactor = NVG_ZERO; + dfactor = NVG_SRC_ALPHA; + } + else if (op == NVG_DESTINATION_OUT) + { + sfactor = NVG_ZERO; + dfactor = NVG_ONE_MINUS_SRC_ALPHA; + } + else if (op == NVG_DESTINATION_ATOP) + { + sfactor = NVG_ONE_MINUS_DST_ALPHA; + dfactor = NVG_SRC_ALPHA; + } + else if (op == NVG_LIGHTER) + { + sfactor = NVG_ONE; + dfactor = NVG_ONE; + } + else if (op == NVG_COPY) + { + sfactor = NVG_ONE; + dfactor = NVG_ZERO; + } + else if (op == NVG_XOR) + { + sfactor = NVG_ONE_MINUS_DST_ALPHA; + dfactor = NVG_ONE_MINUS_SRC_ALPHA; + } + else + { + sfactor = NVG_ONE; + dfactor = NVG_ZERO; + } + + NVGcompositeOperationState state; + state.srcRGB = sfactor; + state.dstRGB = dfactor; + state.srcAlpha = sfactor; + state.dstAlpha = dfactor; + return state; +} + +static NVGstate* nvg__getState(NVGcontext* ctx) +{ + return &ctx->states[ctx->nstates-1]; +} + +NVGcontext* nvgCreateInternal(NVGparams* params) +{ + FONSparams fontParams; + NVGcontext* ctx = (NVGcontext*)malloc(sizeof(NVGcontext)); + int i; + if (ctx == NULL) goto error; + memset(ctx, 0, sizeof(NVGcontext)); + + ctx->params = *params; + for (i = 0; i < NVG_MAX_FONTIMAGES; i++) + ctx->fontImages[i] = 0; + + ctx->commands = (float*)malloc(sizeof(float)*NVG_INIT_COMMANDS_SIZE); + if (!ctx->commands) goto error; + ctx->ncommands = 0; + ctx->ccommands = NVG_INIT_COMMANDS_SIZE; + + ctx->cache = nvg__allocPathCache(); + if (ctx->cache == NULL) goto error; + + nvgSave(ctx); + nvgReset(ctx); + + nvg__setDevicePixelRatio(ctx, 1.0f); + + if (ctx->params.renderCreate(ctx->params.userPtr) == 0) goto error; + + // Init font rendering + memset(&fontParams, 0, sizeof(fontParams)); + fontParams.width = NVG_INIT_FONTIMAGE_SIZE; + fontParams.height = NVG_INIT_FONTIMAGE_SIZE; + fontParams.flags = FONS_ZERO_TOPLEFT; + fontParams.renderCreate = NULL; + fontParams.renderUpdate = NULL; + fontParams.renderDraw = NULL; + fontParams.renderDelete = NULL; + fontParams.userPtr = NULL; + ctx->fs = fonsCreateInternal(&fontParams); + if (ctx->fs == NULL) goto error; + + // Create font texture + ctx->fontImages[0] = ctx->params.renderCreateTexture(ctx->params.userPtr, NVG_TEXTURE_ALPHA, fontParams.width, fontParams.height, 0, NULL); + if (ctx->fontImages[0] == 0) goto error; + ctx->fontImageIdx = 0; + + return ctx; + +error: + nvgDeleteInternal(ctx); + return 0; +} + +NVGparams* nvgInternalParams(NVGcontext* ctx) +{ + return &ctx->params; +} + +void nvgDeleteInternal(NVGcontext* ctx) +{ + int i; + if (ctx == NULL) return; + if (ctx->commands != NULL) free(ctx->commands); + if (ctx->cache != NULL) nvg__deletePathCache(ctx->cache); + + if (ctx->fs) + fonsDeleteInternal(ctx->fs); + + for (i = 0; i < NVG_MAX_FONTIMAGES; i++) { + if (ctx->fontImages[i] != 0) { + nvgDeleteImage(ctx, ctx->fontImages[i]); + ctx->fontImages[i] = 0; + } + } + + if (ctx->params.renderDelete != NULL) + ctx->params.renderDelete(ctx->params.userPtr); + + free(ctx); +} + +void nvgBeginFrame(NVGcontext* ctx, float windowWidth, float windowHeight, float devicePixelRatio) +{ +/* printf("Tris: draws:%d fill:%d stroke:%d text:%d TOT:%d\n", + ctx->drawCallCount, ctx->fillTriCount, ctx->strokeTriCount, ctx->textTriCount, + ctx->fillTriCount+ctx->strokeTriCount+ctx->textTriCount);*/ + + ctx->nstates = 0; + nvgSave(ctx); + nvgReset(ctx); + + nvg__setDevicePixelRatio(ctx, devicePixelRatio); + + ctx->params.renderViewport(ctx->params.userPtr, windowWidth, windowHeight, devicePixelRatio); + + ctx->drawCallCount = 0; + ctx->fillTriCount = 0; + ctx->strokeTriCount = 0; + ctx->textTriCount = 0; +} + +void nvgCancelFrame(NVGcontext* ctx) +{ + ctx->params.renderCancel(ctx->params.userPtr); +} + +void nvgEndFrame(NVGcontext* ctx) +{ + ctx->params.renderFlush(ctx->params.userPtr); + if (ctx->fontImageIdx != 0) { + int fontImage = ctx->fontImages[ctx->fontImageIdx]; + int i, j, iw, ih; + // delete images that smaller than current one + if (fontImage == 0) + return; + nvgImageSize(ctx, fontImage, &iw, &ih); + for (i = j = 0; i < ctx->fontImageIdx; i++) { + if (ctx->fontImages[i] != 0) { + int nw, nh; + nvgImageSize(ctx, ctx->fontImages[i], &nw, &nh); + if (nw < iw || nh < ih) + nvgDeleteImage(ctx, ctx->fontImages[i]); + else + ctx->fontImages[j++] = ctx->fontImages[i]; + } + } + // make current font image to first + ctx->fontImages[j++] = ctx->fontImages[0]; + ctx->fontImages[0] = fontImage; + ctx->fontImageIdx = 0; + // clear all images after j + for (i = j; i < NVG_MAX_FONTIMAGES; i++) + ctx->fontImages[i] = 0; + } +} + +NVGcolor nvgRGB(unsigned char r, unsigned char g, unsigned char b) +{ + return nvgRGBA(r,g,b,255); +} + +NVGcolor nvgRGBf(float r, float g, float b) +{ + return nvgRGBAf(r,g,b,1.0f); +} + +NVGcolor nvgRGBA(unsigned char r, unsigned char g, unsigned char b, unsigned char a) +{ + NVGcolor color; + // Use longer initialization to suppress warning. + color.r = r / 255.0f; + color.g = g / 255.0f; + color.b = b / 255.0f; + color.a = a / 255.0f; + return color; +} + +NVGcolor nvgRGBAf(float r, float g, float b, float a) +{ + NVGcolor color; + // Use longer initialization to suppress warning. + color.r = r; + color.g = g; + color.b = b; + color.a = a; + return color; +} + +NVGcolor nvgTransRGBA(NVGcolor c, unsigned char a) +{ + c.a = a / 255.0f; + return c; +} + +NVGcolor nvgTransRGBAf(NVGcolor c, float a) +{ + c.a = a; + return c; +} + +NVGcolor nvgLerpRGBA(NVGcolor c0, NVGcolor c1, float u) +{ + int i; + float oneminu; + NVGcolor cint = {{{0}}}; + + u = nvg__clampf(u, 0.0f, 1.0f); + oneminu = 1.0f - u; + for( i = 0; i <4; i++ ) + { + cint.rgba[i] = c0.rgba[i] * oneminu + c1.rgba[i] * u; + } + + return cint; +} + +NVGcolor nvgHSL(float h, float s, float l) +{ + return nvgHSLA(h,s,l,255); +} + +static float nvg__hue(float h, float m1, float m2) +{ + if (h < 0) h += 1; + if (h > 1) h -= 1; + if (h < 1.0f/6.0f) + return m1 + (m2 - m1) * h * 6.0f; + else if (h < 3.0f/6.0f) + return m2; + else if (h < 4.0f/6.0f) + return m1 + (m2 - m1) * (2.0f/3.0f - h) * 6.0f; + return m1; +} + +NVGcolor nvgHSLA(float h, float s, float l, unsigned char a) +{ + float m1, m2; + NVGcolor col; + h = nvg__modf(h, 1.0f); + if (h < 0.0f) h += 1.0f; + s = nvg__clampf(s, 0.0f, 1.0f); + l = nvg__clampf(l, 0.0f, 1.0f); + m2 = l <= 0.5f ? (l * (1 + s)) : (l + s - l * s); + m1 = 2 * l - m2; + col.r = nvg__clampf(nvg__hue(h + 1.0f/3.0f, m1, m2), 0.0f, 1.0f); + col.g = nvg__clampf(nvg__hue(h, m1, m2), 0.0f, 1.0f); + col.b = nvg__clampf(nvg__hue(h - 1.0f/3.0f, m1, m2), 0.0f, 1.0f); + col.a = a/255.0f; + return col; +} + +void nvgTransformIdentity(float* t) +{ + t[0] = 1.0f; t[1] = 0.0f; + t[2] = 0.0f; t[3] = 1.0f; + t[4] = 0.0f; t[5] = 0.0f; +} + +void nvgTransformTranslate(float* t, float tx, float ty) +{ + t[0] = 1.0f; t[1] = 0.0f; + t[2] = 0.0f; t[3] = 1.0f; + t[4] = tx; t[5] = ty; +} + +void nvgTransformScale(float* t, float sx, float sy) +{ + t[0] = sx; t[1] = 0.0f; + t[2] = 0.0f; t[3] = sy; + t[4] = 0.0f; t[5] = 0.0f; +} + +void nvgTransformRotate(float* t, float a) +{ + float cs = nvg__cosf(a), sn = nvg__sinf(a); + t[0] = cs; t[1] = sn; + t[2] = -sn; t[3] = cs; + t[4] = 0.0f; t[5] = 0.0f; +} + +void nvgTransformSkewX(float* t, float a) +{ + t[0] = 1.0f; t[1] = 0.0f; + t[2] = nvg__tanf(a); t[3] = 1.0f; + t[4] = 0.0f; t[5] = 0.0f; +} + +void nvgTransformSkewY(float* t, float a) +{ + t[0] = 1.0f; t[1] = nvg__tanf(a); + t[2] = 0.0f; t[3] = 1.0f; + t[4] = 0.0f; t[5] = 0.0f; +} + +void nvgTransformMultiply(float* t, const float* s) +{ + float t0 = t[0] * s[0] + t[1] * s[2]; + float t2 = t[2] * s[0] + t[3] * s[2]; + float t4 = t[4] * s[0] + t[5] * s[2] + s[4]; + t[1] = t[0] * s[1] + t[1] * s[3]; + t[3] = t[2] * s[1] + t[3] * s[3]; + t[5] = t[4] * s[1] + t[5] * s[3] + s[5]; + t[0] = t0; + t[2] = t2; + t[4] = t4; +} + +void nvgTransformPremultiply(float* t, const float* s) +{ + float s2[6]; + memcpy(s2, s, sizeof(float)*6); + nvgTransformMultiply(s2, t); + memcpy(t, s2, sizeof(float)*6); +} + +int nvgTransformInverse(float* inv, const float* t) +{ + double invdet, det = (double)t[0] * t[3] - (double)t[2] * t[1]; + if (det > -1e-6 && det < 1e-6) { + nvgTransformIdentity(inv); + return 0; + } + invdet = 1.0 / det; + inv[0] = (float)(t[3] * invdet); + inv[2] = (float)(-t[2] * invdet); + inv[4] = (float)(((double)t[2] * t[5] - (double)t[3] * t[4]) * invdet); + inv[1] = (float)(-t[1] * invdet); + inv[3] = (float)(t[0] * invdet); + inv[5] = (float)(((double)t[1] * t[4] - (double)t[0] * t[5]) * invdet); + return 1; +} + +void nvgTransformPoint(float* dx, float* dy, const float* t, float sx, float sy) +{ + *dx = sx*t[0] + sy*t[2] + t[4]; + *dy = sx*t[1] + sy*t[3] + t[5]; +} + +float nvgDegToRad(float deg) +{ + return deg / 180.0f * NVG_PI; +} + +float nvgRadToDeg(float rad) +{ + return rad / NVG_PI * 180.0f; +} + +static void nvg__setPaintColor(NVGpaint* p, NVGcolor color) +{ + memset(p, 0, sizeof(*p)); + nvgTransformIdentity(p->xform); + p->radius = 0.0f; + p->feather = 1.0f; + p->innerColor = color; + p->outerColor = color; +} + + +// State handling +void nvgSave(NVGcontext* ctx) +{ + if (ctx->nstates >= NVG_MAX_STATES) + return; + if (ctx->nstates > 0) + memcpy(&ctx->states[ctx->nstates], &ctx->states[ctx->nstates-1], sizeof(NVGstate)); + ctx->nstates++; +} + +void nvgRestore(NVGcontext* ctx) +{ + if (ctx->nstates <= 1) + return; + ctx->nstates--; +} + +void nvgReset(NVGcontext* ctx) +{ + NVGstate* state = nvg__getState(ctx); + memset(state, 0, sizeof(*state)); + + nvg__setPaintColor(&state->fill, nvgRGBA(255,255,255,255)); + nvg__setPaintColor(&state->stroke, nvgRGBA(0,0,0,255)); + state->compositeOperation = nvg__compositeOperationState(NVG_SOURCE_OVER); + state->shapeAntiAlias = 1; + state->strokeWidth = 1.0f; + state->miterLimit = 10.0f; + state->lineCap = NVG_BUTT; + state->lineJoin = NVG_MITER; + state->alpha = 1.0f; + nvgTransformIdentity(state->xform); + + state->scissor.extent[0] = -1.0f; + state->scissor.extent[1] = -1.0f; + + state->fontSize = 16.0f; + state->letterSpacing = 0.0f; + state->lineHeight = 1.0f; + state->fontBlur = 0.0f; + state->textAlign = NVG_ALIGN_LEFT | NVG_ALIGN_BASELINE; + state->fontId = 0; +} + +// State setting +void nvgShapeAntiAlias(NVGcontext* ctx, int enabled) +{ + NVGstate* state = nvg__getState(ctx); + state->shapeAntiAlias = enabled; +} + +void nvgStrokeWidth(NVGcontext* ctx, float width) +{ + NVGstate* state = nvg__getState(ctx); + state->strokeWidth = width; +} + +void nvgMiterLimit(NVGcontext* ctx, float limit) +{ + NVGstate* state = nvg__getState(ctx); + state->miterLimit = limit; +} + +void nvgLineCap(NVGcontext* ctx, int cap) +{ + NVGstate* state = nvg__getState(ctx); + state->lineCap = cap; +} + +void nvgLineJoin(NVGcontext* ctx, int join) +{ + NVGstate* state = nvg__getState(ctx); + state->lineJoin = join; +} + +void nvgGlobalAlpha(NVGcontext* ctx, float alpha) +{ + NVGstate* state = nvg__getState(ctx); + state->alpha = alpha; +} + +void nvgTransform(NVGcontext* ctx, float a, float b, float c, float d, float e, float f) +{ + NVGstate* state = nvg__getState(ctx); + float t[6] = { a, b, c, d, e, f }; + nvgTransformPremultiply(state->xform, t); +} + +void nvgResetTransform(NVGcontext* ctx) +{ + NVGstate* state = nvg__getState(ctx); + nvgTransformIdentity(state->xform); +} + +void nvgTranslate(NVGcontext* ctx, float x, float y) +{ + NVGstate* state = nvg__getState(ctx); + float t[6]; + nvgTransformTranslate(t, x,y); + nvgTransformPremultiply(state->xform, t); +} + +void nvgRotate(NVGcontext* ctx, float angle) +{ + NVGstate* state = nvg__getState(ctx); + float t[6]; + nvgTransformRotate(t, angle); + nvgTransformPremultiply(state->xform, t); +} + +void nvgSkewX(NVGcontext* ctx, float angle) +{ + NVGstate* state = nvg__getState(ctx); + float t[6]; + nvgTransformSkewX(t, angle); + nvgTransformPremultiply(state->xform, t); +} + +void nvgSkewY(NVGcontext* ctx, float angle) +{ + NVGstate* state = nvg__getState(ctx); + float t[6]; + nvgTransformSkewY(t, angle); + nvgTransformPremultiply(state->xform, t); +} + +void nvgScale(NVGcontext* ctx, float x, float y) +{ + NVGstate* state = nvg__getState(ctx); + float t[6]; + nvgTransformScale(t, x,y); + nvgTransformPremultiply(state->xform, t); +} + +void nvgCurrentTransform(NVGcontext* ctx, float* xform) +{ + NVGstate* state = nvg__getState(ctx); + if (xform == NULL) return; + memcpy(xform, state->xform, sizeof(float)*6); +} + +void nvgStrokeColor(NVGcontext* ctx, NVGcolor color) +{ + NVGstate* state = nvg__getState(ctx); + nvg__setPaintColor(&state->stroke, color); +} + +void nvgStrokePaint(NVGcontext* ctx, NVGpaint paint) +{ + NVGstate* state = nvg__getState(ctx); + state->stroke = paint; + nvgTransformMultiply(state->stroke.xform, state->xform); +} + +void nvgFillColor(NVGcontext* ctx, NVGcolor color) +{ + NVGstate* state = nvg__getState(ctx); + nvg__setPaintColor(&state->fill, color); +} + +void nvgFillPaint(NVGcontext* ctx, NVGpaint paint) +{ + NVGstate* state = nvg__getState(ctx); + state->fill = paint; + nvgTransformMultiply(state->fill.xform, state->xform); +} + +int nvgCreateImage(NVGcontext* ctx, const char* filename, int imageFlags) +{ + int w, h, n, image; + unsigned char* img; + stbi_set_unpremultiply_on_load(1); + stbi_convert_iphone_png_to_rgb(1); + img = stbi_load(filename, &w, &h, &n, 4); + if (img == NULL) { +// printf("Failed to load %s - %s\n", filename, stbi_failure_reason()); + return 0; + } + image = nvgCreateImageRGBA(ctx, w, h, imageFlags, img); + stbi_image_free(img); + return image; +} + +int nvgCreateImageMem(NVGcontext* ctx, int imageFlags, unsigned char* data, int ndata) +{ + int w, h, n, image; + unsigned char* img = stbi_load_from_memory(data, ndata, &w, &h, &n, 4); + if (img == NULL) { +// printf("Failed to load %s - %s\n", filename, stbi_failure_reason()); + return 0; + } + image = nvgCreateImageRGBA(ctx, w, h, imageFlags, img); + stbi_image_free(img); + return image; +} + +int nvgCreateImageRGBA(NVGcontext* ctx, int w, int h, int imageFlags, const unsigned char* data) +{ + return ctx->params.renderCreateTexture(ctx->params.userPtr, NVG_TEXTURE_RGBA, w, h, imageFlags, data); +} + +void nvgUpdateImage(NVGcontext* ctx, int image, const unsigned char* data) +{ + int w, h; + ctx->params.renderGetTextureSize(ctx->params.userPtr, image, &w, &h); + ctx->params.renderUpdateTexture(ctx->params.userPtr, image, 0,0, w,h, data); +} + +void nvgImageSize(NVGcontext* ctx, int image, int* w, int* h) +{ + ctx->params.renderGetTextureSize(ctx->params.userPtr, image, w, h); +} + +void nvgDeleteImage(NVGcontext* ctx, int image) +{ + ctx->params.renderDeleteTexture(ctx->params.userPtr, image); +} + +NVGpaint nvgLinearGradient(NVGcontext* ctx, + float sx, float sy, float ex, float ey, + NVGcolor icol, NVGcolor ocol) +{ + NVGpaint p; + float dx, dy, d; + const float large = 1e5; + NVG_NOTUSED(ctx); + memset(&p, 0, sizeof(p)); + + // Calculate transform aligned to the line + dx = ex - sx; + dy = ey - sy; + d = sqrtf(dx*dx + dy*dy); + if (d > 0.0001f) { + dx /= d; + dy /= d; + } else { + dx = 0; + dy = 1; + } + + p.xform[0] = dy; p.xform[1] = -dx; + p.xform[2] = dx; p.xform[3] = dy; + p.xform[4] = sx - dx*large; p.xform[5] = sy - dy*large; + + p.extent[0] = large; + p.extent[1] = large + d*0.5f; + + p.radius = 0.0f; + + p.feather = nvg__maxf(1.0f, d); + + p.innerColor = icol; + p.outerColor = ocol; + + return p; +} + +NVGpaint nvgRadialGradient(NVGcontext* ctx, + float cx, float cy, float inr, float outr, + NVGcolor icol, NVGcolor ocol) +{ + NVGpaint p; + float r = (inr+outr)*0.5f; + float f = (outr-inr); + NVG_NOTUSED(ctx); + memset(&p, 0, sizeof(p)); + + nvgTransformIdentity(p.xform); + p.xform[4] = cx; + p.xform[5] = cy; + + p.extent[0] = r; + p.extent[1] = r; + + p.radius = r; + + p.feather = nvg__maxf(1.0f, f); + + p.innerColor = icol; + p.outerColor = ocol; + + return p; +} + +NVGpaint nvgBoxGradient(NVGcontext* ctx, + float x, float y, float w, float h, float r, float f, + NVGcolor icol, NVGcolor ocol) +{ + NVGpaint p; + NVG_NOTUSED(ctx); + memset(&p, 0, sizeof(p)); + + nvgTransformIdentity(p.xform); + p.xform[4] = x+w*0.5f; + p.xform[5] = y+h*0.5f; + + p.extent[0] = w*0.5f; + p.extent[1] = h*0.5f; + + p.radius = r; + + p.feather = nvg__maxf(1.0f, f); + + p.innerColor = icol; + p.outerColor = ocol; + + return p; +} + + +NVGpaint nvgImagePattern(NVGcontext* ctx, + float cx, float cy, float w, float h, float angle, + int image, float alpha) +{ + NVGpaint p; + NVG_NOTUSED(ctx); + memset(&p, 0, sizeof(p)); + + nvgTransformRotate(p.xform, angle); + p.xform[4] = cx; + p.xform[5] = cy; + + p.extent[0] = w; + p.extent[1] = h; + + p.image = image; + + p.innerColor = p.outerColor = nvgRGBAf(1,1,1,alpha); + + return p; +} + +// Scissoring +void nvgScissor(NVGcontext* ctx, float x, float y, float w, float h) +{ + NVGstate* state = nvg__getState(ctx); + + w = nvg__maxf(0.0f, w); + h = nvg__maxf(0.0f, h); + + nvgTransformIdentity(state->scissor.xform); + state->scissor.xform[4] = x+w*0.5f; + state->scissor.xform[5] = y+h*0.5f; + nvgTransformMultiply(state->scissor.xform, state->xform); + + state->scissor.extent[0] = w*0.5f; + state->scissor.extent[1] = h*0.5f; +} + +static void nvg__isectRects(float* dst, + float ax, float ay, float aw, float ah, + float bx, float by, float bw, float bh) +{ + float minx = nvg__maxf(ax, bx); + float miny = nvg__maxf(ay, by); + float maxx = nvg__minf(ax+aw, bx+bw); + float maxy = nvg__minf(ay+ah, by+bh); + dst[0] = minx; + dst[1] = miny; + dst[2] = nvg__maxf(0.0f, maxx - minx); + dst[3] = nvg__maxf(0.0f, maxy - miny); +} + +void nvgIntersectScissor(NVGcontext* ctx, float x, float y, float w, float h) +{ + NVGstate* state = nvg__getState(ctx); + float pxform[6], invxorm[6]; + float rect[4]; + float ex, ey, tex, tey; + + // If no previous scissor has been set, set the scissor as current scissor. + if (state->scissor.extent[0] < 0) { + nvgScissor(ctx, x, y, w, h); + return; + } + + // Transform the current scissor rect into current transform space. + // If there is difference in rotation, this will be approximation. + memcpy(pxform, state->scissor.xform, sizeof(float)*6); + ex = state->scissor.extent[0]; + ey = state->scissor.extent[1]; + nvgTransformInverse(invxorm, state->xform); + nvgTransformMultiply(pxform, invxorm); + tex = ex*nvg__absf(pxform[0]) + ey*nvg__absf(pxform[2]); + tey = ex*nvg__absf(pxform[1]) + ey*nvg__absf(pxform[3]); + + // Intersect rects. + nvg__isectRects(rect, pxform[4]-tex,pxform[5]-tey,tex*2,tey*2, x,y,w,h); + + nvgScissor(ctx, rect[0], rect[1], rect[2], rect[3]); +} + +void nvgResetScissor(NVGcontext* ctx) +{ + NVGstate* state = nvg__getState(ctx); + memset(state->scissor.xform, 0, sizeof(state->scissor.xform)); + state->scissor.extent[0] = -1.0f; + state->scissor.extent[1] = -1.0f; +} + +// Global composite operation. +void nvgGlobalCompositeOperation(NVGcontext* ctx, int op) +{ + NVGstate* state = nvg__getState(ctx); + state->compositeOperation = nvg__compositeOperationState(op); +} + +void nvgGlobalCompositeBlendFunc(NVGcontext* ctx, int sfactor, int dfactor) +{ + nvgGlobalCompositeBlendFuncSeparate(ctx, sfactor, dfactor, sfactor, dfactor); +} + +void nvgGlobalCompositeBlendFuncSeparate(NVGcontext* ctx, int srcRGB, int dstRGB, int srcAlpha, int dstAlpha) +{ + NVGcompositeOperationState op; + op.srcRGB = srcRGB; + op.dstRGB = dstRGB; + op.srcAlpha = srcAlpha; + op.dstAlpha = dstAlpha; + + NVGstate* state = nvg__getState(ctx); + state->compositeOperation = op; +} + +static int nvg__ptEquals(float x1, float y1, float x2, float y2, float tol) +{ + float dx = x2 - x1; + float dy = y2 - y1; + return dx*dx + dy*dy < tol*tol; +} + +static float nvg__distPtSeg(float x, float y, float px, float py, float qx, float qy) +{ + float pqx, pqy, dx, dy, d, t; + pqx = qx-px; + pqy = qy-py; + dx = x-px; + dy = y-py; + d = pqx*pqx + pqy*pqy; + t = pqx*dx + pqy*dy; + if (d > 0) t /= d; + if (t < 0) t = 0; + else if (t > 1) t = 1; + dx = px + t*pqx - x; + dy = py + t*pqy - y; + return dx*dx + dy*dy; +} + +static void nvg__appendCommands(NVGcontext* ctx, float* vals, int nvals) +{ + NVGstate* state = nvg__getState(ctx); + int i; + + if (ctx->ncommands+nvals > ctx->ccommands) { + float* commands; + int ccommands = ctx->ncommands+nvals + ctx->ccommands/2; + commands = (float*)realloc(ctx->commands, sizeof(float)*ccommands); + if (commands == NULL) return; + ctx->commands = commands; + ctx->ccommands = ccommands; + } + + if ((int)vals[0] != NVG_CLOSE && (int)vals[0] != NVG_WINDING) { + ctx->commandx = vals[nvals-2]; + ctx->commandy = vals[nvals-1]; + } + + // transform commands + i = 0; + while (i < nvals) { + int cmd = (int)vals[i]; + switch (cmd) { + case NVG_MOVETO: + nvgTransformPoint(&vals[i+1],&vals[i+2], state->xform, vals[i+1],vals[i+2]); + i += 3; + break; + case NVG_LINETO: + nvgTransformPoint(&vals[i+1],&vals[i+2], state->xform, vals[i+1],vals[i+2]); + i += 3; + break; + case NVG_BEZIERTO: + nvgTransformPoint(&vals[i+1],&vals[i+2], state->xform, vals[i+1],vals[i+2]); + nvgTransformPoint(&vals[i+3],&vals[i+4], state->xform, vals[i+3],vals[i+4]); + nvgTransformPoint(&vals[i+5],&vals[i+6], state->xform, vals[i+5],vals[i+6]); + i += 7; + break; + case NVG_CLOSE: + i++; + break; + case NVG_WINDING: + i += 2; + break; + default: + i++; + } + } + + memcpy(&ctx->commands[ctx->ncommands], vals, nvals*sizeof(float)); + + ctx->ncommands += nvals; +} + + +static void nvg__clearPathCache(NVGcontext* ctx) +{ + ctx->cache->npoints = 0; + ctx->cache->npaths = 0; +} + +static NVGpath* nvg__lastPath(NVGcontext* ctx) +{ + if (ctx->cache->npaths > 0) + return &ctx->cache->paths[ctx->cache->npaths-1]; + return NULL; +} + +static void nvg__addPath(NVGcontext* ctx) +{ + NVGpath* path; + if (ctx->cache->npaths+1 > ctx->cache->cpaths) { + NVGpath* paths; + int cpaths = ctx->cache->npaths+1 + ctx->cache->cpaths/2; + paths = (NVGpath*)realloc(ctx->cache->paths, sizeof(NVGpath)*cpaths); + if (paths == NULL) return; + ctx->cache->paths = paths; + ctx->cache->cpaths = cpaths; + } + path = &ctx->cache->paths[ctx->cache->npaths]; + memset(path, 0, sizeof(*path)); + path->first = ctx->cache->npoints; + path->winding = NVG_CCW; + + ctx->cache->npaths++; +} + +static NVGpoint* nvg__lastPoint(NVGcontext* ctx) +{ + if (ctx->cache->npoints > 0) + return &ctx->cache->points[ctx->cache->npoints-1]; + return NULL; +} + +static void nvg__addPoint(NVGcontext* ctx, float x, float y, int flags) +{ + NVGpath* path = nvg__lastPath(ctx); + NVGpoint* pt; + if (path == NULL) return; + + if (path->count > 0 && ctx->cache->npoints > 0) { + pt = nvg__lastPoint(ctx); + if (nvg__ptEquals(pt->x,pt->y, x,y, ctx->distTol)) { + pt->flags |= flags; + return; + } + } + + if (ctx->cache->npoints+1 > ctx->cache->cpoints) { + NVGpoint* points; + int cpoints = ctx->cache->npoints+1 + ctx->cache->cpoints/2; + points = (NVGpoint*)realloc(ctx->cache->points, sizeof(NVGpoint)*cpoints); + if (points == NULL) return; + ctx->cache->points = points; + ctx->cache->cpoints = cpoints; + } + + pt = &ctx->cache->points[ctx->cache->npoints]; + memset(pt, 0, sizeof(*pt)); + pt->x = x; + pt->y = y; + pt->flags = (unsigned char)flags; + + ctx->cache->npoints++; + path->count++; +} + +static void nvg__closePath(NVGcontext* ctx) +{ + NVGpath* path = nvg__lastPath(ctx); + if (path == NULL) return; + path->closed = 1; +} + +static void nvg__pathWinding(NVGcontext* ctx, int winding) +{ + NVGpath* path = nvg__lastPath(ctx); + if (path == NULL) return; + path->winding = winding; +} + +static float nvg__getAverageScale(float *t) +{ + float sx = sqrtf(t[0]*t[0] + t[2]*t[2]); + float sy = sqrtf(t[1]*t[1] + t[3]*t[3]); + return (sx + sy) * 0.5f; +} + +static NVGvertex* nvg__allocTempVerts(NVGcontext* ctx, int nverts) +{ + if (nverts > ctx->cache->cverts) { + NVGvertex* verts; + int cverts = (nverts + 0xff) & ~0xff; // Round up to prevent allocations when things change just slightly. + verts = (NVGvertex*)realloc(ctx->cache->verts, sizeof(NVGvertex)*cverts); + if (verts == NULL) return NULL; + ctx->cache->verts = verts; + ctx->cache->cverts = cverts; + } + + return ctx->cache->verts; +} + +static float nvg__triarea2(float ax, float ay, float bx, float by, float cx, float cy) +{ + float abx = bx - ax; + float aby = by - ay; + float acx = cx - ax; + float acy = cy - ay; + return acx*aby - abx*acy; +} + +static float nvg__polyArea(NVGpoint* pts, int npts) +{ + int i; + float area = 0; + for (i = 2; i < npts; i++) { + NVGpoint* a = &pts[0]; + NVGpoint* b = &pts[i-1]; + NVGpoint* c = &pts[i]; + area += nvg__triarea2(a->x,a->y, b->x,b->y, c->x,c->y); + } + return area * 0.5f; +} + +static void nvg__polyReverse(NVGpoint* pts, int npts) +{ + NVGpoint tmp; + int i = 0, j = npts-1; + while (i < j) { + tmp = pts[i]; + pts[i] = pts[j]; + pts[j] = tmp; + i++; + j--; + } +} + + +static void nvg__vset(NVGvertex* vtx, float x, float y, float u, float v) +{ + vtx->x = x; + vtx->y = y; + vtx->u = u; + vtx->v = v; +} + +static void nvg__tesselateBezier(NVGcontext* ctx, + float x1, float y1, float x2, float y2, + float x3, float y3, float x4, float y4, + int level, int type) +{ + float x12,y12,x23,y23,x34,y34,x123,y123,x234,y234,x1234,y1234; + float dx,dy,d2,d3; + + if (level > 10) return; + + x12 = (x1+x2)*0.5f; + y12 = (y1+y2)*0.5f; + x23 = (x2+x3)*0.5f; + y23 = (y2+y3)*0.5f; + x34 = (x3+x4)*0.5f; + y34 = (y3+y4)*0.5f; + x123 = (x12+x23)*0.5f; + y123 = (y12+y23)*0.5f; + + dx = x4 - x1; + dy = y4 - y1; + d2 = nvg__absf(((x2 - x4) * dy - (y2 - y4) * dx)); + d3 = nvg__absf(((x3 - x4) * dy - (y3 - y4) * dx)); + + if ((d2 + d3)*(d2 + d3) < ctx->tessTol * (dx*dx + dy*dy)) { + nvg__addPoint(ctx, x4, y4, type); + return; + } + +/* if (nvg__absf(x1+x3-x2-x2) + nvg__absf(y1+y3-y2-y2) + nvg__absf(x2+x4-x3-x3) + nvg__absf(y2+y4-y3-y3) < ctx->tessTol) { + nvg__addPoint(ctx, x4, y4, type); + return; + }*/ + + x234 = (x23+x34)*0.5f; + y234 = (y23+y34)*0.5f; + x1234 = (x123+x234)*0.5f; + y1234 = (y123+y234)*0.5f; + + nvg__tesselateBezier(ctx, x1,y1, x12,y12, x123,y123, x1234,y1234, level+1, 0); + nvg__tesselateBezier(ctx, x1234,y1234, x234,y234, x34,y34, x4,y4, level+1, type); +} + +static void nvg__flattenPaths(NVGcontext* ctx) +{ + NVGpathCache* cache = ctx->cache; +// NVGstate* state = nvg__getState(ctx); + NVGpoint* last; + NVGpoint* p0; + NVGpoint* p1; + NVGpoint* pts; + NVGpath* path; + int i, j; + float* cp1; + float* cp2; + float* p; + float area; + + if (cache->npaths > 0) + return; + + // Flatten + i = 0; + while (i < ctx->ncommands) { + int cmd = (int)ctx->commands[i]; + switch (cmd) { + case NVG_MOVETO: + nvg__addPath(ctx); + p = &ctx->commands[i+1]; + nvg__addPoint(ctx, p[0], p[1], NVG_PT_CORNER); + i += 3; + break; + case NVG_LINETO: + p = &ctx->commands[i+1]; + nvg__addPoint(ctx, p[0], p[1], NVG_PT_CORNER); + i += 3; + break; + case NVG_BEZIERTO: + last = nvg__lastPoint(ctx); + if (last != NULL) { + cp1 = &ctx->commands[i+1]; + cp2 = &ctx->commands[i+3]; + p = &ctx->commands[i+5]; + nvg__tesselateBezier(ctx, last->x,last->y, cp1[0],cp1[1], cp2[0],cp2[1], p[0],p[1], 0, NVG_PT_CORNER); + } + i += 7; + break; + case NVG_CLOSE: + nvg__closePath(ctx); + i++; + break; + case NVG_WINDING: + nvg__pathWinding(ctx, (int)ctx->commands[i+1]); + i += 2; + break; + default: + i++; + } + } + + cache->bounds[0] = cache->bounds[1] = 1e6f; + cache->bounds[2] = cache->bounds[3] = -1e6f; + + // Calculate the direction and length of line segments. + for (j = 0; j < cache->npaths; j++) { + path = &cache->paths[j]; + pts = &cache->points[path->first]; + + // If the first and last points are the same, remove the last, mark as closed path. + p0 = &pts[path->count-1]; + p1 = &pts[0]; + if (nvg__ptEquals(p0->x,p0->y, p1->x,p1->y, ctx->distTol)) { + path->count--; + p0 = &pts[path->count-1]; + path->closed = 1; + } + + // Enforce winding. + if (path->count > 2) { + area = nvg__polyArea(pts, path->count); + if (path->winding == NVG_CCW && area < 0.0f) + nvg__polyReverse(pts, path->count); + if (path->winding == NVG_CW && area > 0.0f) + nvg__polyReverse(pts, path->count); + } + + for(i = 0; i < path->count; i++) { + // Calculate segment direction and length + p0->dx = p1->x - p0->x; + p0->dy = p1->y - p0->y; + p0->len = nvg__normalize(&p0->dx, &p0->dy); + // Update bounds + cache->bounds[0] = nvg__minf(cache->bounds[0], p0->x); + cache->bounds[1] = nvg__minf(cache->bounds[1], p0->y); + cache->bounds[2] = nvg__maxf(cache->bounds[2], p0->x); + cache->bounds[3] = nvg__maxf(cache->bounds[3], p0->y); + // Advance + p0 = p1++; + } + } +} + +static int nvg__curveDivs(float r, float arc, float tol) +{ + float da = acosf(r / (r + tol)) * 2.0f; + return nvg__maxi(2, (int)ceilf(arc / da)); +} + +static void nvg__chooseBevel(int bevel, NVGpoint* p0, NVGpoint* p1, float w, + float* x0, float* y0, float* x1, float* y1) +{ + if (bevel) { + *x0 = p1->x + p0->dy * w; + *y0 = p1->y - p0->dx * w; + *x1 = p1->x + p1->dy * w; + *y1 = p1->y - p1->dx * w; + } else { + *x0 = p1->x + p1->dmx * w; + *y0 = p1->y + p1->dmy * w; + *x1 = p1->x + p1->dmx * w; + *y1 = p1->y + p1->dmy * w; + } +} + +static NVGvertex* nvg__roundJoin(NVGvertex* dst, NVGpoint* p0, NVGpoint* p1, + float lw, float rw, float lu, float ru, int ncap, + float fringe) +{ + int i, n; + float dlx0 = p0->dy; + float dly0 = -p0->dx; + float dlx1 = p1->dy; + float dly1 = -p1->dx; + NVG_NOTUSED(fringe); + + if (p1->flags & NVG_PT_LEFT) { + float lx0,ly0,lx1,ly1,a0,a1; + nvg__chooseBevel(p1->flags & NVG_PR_INNERBEVEL, p0, p1, lw, &lx0,&ly0, &lx1,&ly1); + a0 = atan2f(-dly0, -dlx0); + a1 = atan2f(-dly1, -dlx1); + if (a1 > a0) a1 -= NVG_PI*2; + + nvg__vset(dst, lx0, ly0, lu,1); dst++; + nvg__vset(dst, p1->x - dlx0*rw, p1->y - dly0*rw, ru,1); dst++; + + n = nvg__clampi((int)ceilf(((a0 - a1) / NVG_PI) * ncap), 2, ncap); + for (i = 0; i < n; i++) { + float u = i/(float)(n-1); + float a = a0 + u*(a1-a0); + float rx = p1->x + cosf(a) * rw; + float ry = p1->y + sinf(a) * rw; + nvg__vset(dst, p1->x, p1->y, 0.5f,1); dst++; + nvg__vset(dst, rx, ry, ru,1); dst++; + } + + nvg__vset(dst, lx1, ly1, lu,1); dst++; + nvg__vset(dst, p1->x - dlx1*rw, p1->y - dly1*rw, ru,1); dst++; + + } else { + float rx0,ry0,rx1,ry1,a0,a1; + nvg__chooseBevel(p1->flags & NVG_PR_INNERBEVEL, p0, p1, -rw, &rx0,&ry0, &rx1,&ry1); + a0 = atan2f(dly0, dlx0); + a1 = atan2f(dly1, dlx1); + if (a1 < a0) a1 += NVG_PI*2; + + nvg__vset(dst, p1->x + dlx0*rw, p1->y + dly0*rw, lu,1); dst++; + nvg__vset(dst, rx0, ry0, ru,1); dst++; + + n = nvg__clampi((int)ceilf(((a1 - a0) / NVG_PI) * ncap), 2, ncap); + for (i = 0; i < n; i++) { + float u = i/(float)(n-1); + float a = a0 + u*(a1-a0); + float lx = p1->x + cosf(a) * lw; + float ly = p1->y + sinf(a) * lw; + nvg__vset(dst, lx, ly, lu,1); dst++; + nvg__vset(dst, p1->x, p1->y, 0.5f,1); dst++; + } + + nvg__vset(dst, p1->x + dlx1*rw, p1->y + dly1*rw, lu,1); dst++; + nvg__vset(dst, rx1, ry1, ru,1); dst++; + + } + return dst; +} + +static NVGvertex* nvg__bevelJoin(NVGvertex* dst, NVGpoint* p0, NVGpoint* p1, + float lw, float rw, float lu, float ru, float fringe) +{ + float rx0,ry0,rx1,ry1; + float lx0,ly0,lx1,ly1; + float dlx0 = p0->dy; + float dly0 = -p0->dx; + float dlx1 = p1->dy; + float dly1 = -p1->dx; + NVG_NOTUSED(fringe); + + if (p1->flags & NVG_PT_LEFT) { + nvg__chooseBevel(p1->flags & NVG_PR_INNERBEVEL, p0, p1, lw, &lx0,&ly0, &lx1,&ly1); + + nvg__vset(dst, lx0, ly0, lu,1); dst++; + nvg__vset(dst, p1->x - dlx0*rw, p1->y - dly0*rw, ru,1); dst++; + + if (p1->flags & NVG_PT_BEVEL) { + nvg__vset(dst, lx0, ly0, lu,1); dst++; + nvg__vset(dst, p1->x - dlx0*rw, p1->y - dly0*rw, ru,1); dst++; + + nvg__vset(dst, lx1, ly1, lu,1); dst++; + nvg__vset(dst, p1->x - dlx1*rw, p1->y - dly1*rw, ru,1); dst++; + } else { + rx0 = p1->x - p1->dmx * rw; + ry0 = p1->y - p1->dmy * rw; + + nvg__vset(dst, p1->x, p1->y, 0.5f,1); dst++; + nvg__vset(dst, p1->x - dlx0*rw, p1->y - dly0*rw, ru,1); dst++; + + nvg__vset(dst, rx0, ry0, ru,1); dst++; + nvg__vset(dst, rx0, ry0, ru,1); dst++; + + nvg__vset(dst, p1->x, p1->y, 0.5f,1); dst++; + nvg__vset(dst, p1->x - dlx1*rw, p1->y - dly1*rw, ru,1); dst++; + } + + nvg__vset(dst, lx1, ly1, lu,1); dst++; + nvg__vset(dst, p1->x - dlx1*rw, p1->y - dly1*rw, ru,1); dst++; + + } else { + nvg__chooseBevel(p1->flags & NVG_PR_INNERBEVEL, p0, p1, -rw, &rx0,&ry0, &rx1,&ry1); + + nvg__vset(dst, p1->x + dlx0*lw, p1->y + dly0*lw, lu,1); dst++; + nvg__vset(dst, rx0, ry0, ru,1); dst++; + + if (p1->flags & NVG_PT_BEVEL) { + nvg__vset(dst, p1->x + dlx0*lw, p1->y + dly0*lw, lu,1); dst++; + nvg__vset(dst, rx0, ry0, ru,1); dst++; + + nvg__vset(dst, p1->x + dlx1*lw, p1->y + dly1*lw, lu,1); dst++; + nvg__vset(dst, rx1, ry1, ru,1); dst++; + } else { + lx0 = p1->x + p1->dmx * lw; + ly0 = p1->y + p1->dmy * lw; + + nvg__vset(dst, p1->x + dlx0*lw, p1->y + dly0*lw, lu,1); dst++; + nvg__vset(dst, p1->x, p1->y, 0.5f,1); dst++; + + nvg__vset(dst, lx0, ly0, lu,1); dst++; + nvg__vset(dst, lx0, ly0, lu,1); dst++; + + nvg__vset(dst, p1->x + dlx1*lw, p1->y + dly1*lw, lu,1); dst++; + nvg__vset(dst, p1->x, p1->y, 0.5f,1); dst++; + } + + nvg__vset(dst, p1->x + dlx1*lw, p1->y + dly1*lw, lu,1); dst++; + nvg__vset(dst, rx1, ry1, ru,1); dst++; + } + + return dst; +} + +static NVGvertex* nvg__buttCapStart(NVGvertex* dst, NVGpoint* p, + float dx, float dy, float w, float d, + float aa, float u0, float u1) +{ + float px = p->x - dx*d; + float py = p->y - dy*d; + float dlx = dy; + float dly = -dx; + nvg__vset(dst, px + dlx*w - dx*aa, py + dly*w - dy*aa, u0,0); dst++; + nvg__vset(dst, px - dlx*w - dx*aa, py - dly*w - dy*aa, u1,0); dst++; + nvg__vset(dst, px + dlx*w, py + dly*w, u0,1); dst++; + nvg__vset(dst, px - dlx*w, py - dly*w, u1,1); dst++; + return dst; +} + +static NVGvertex* nvg__buttCapEnd(NVGvertex* dst, NVGpoint* p, + float dx, float dy, float w, float d, + float aa, float u0, float u1) +{ + float px = p->x + dx*d; + float py = p->y + dy*d; + float dlx = dy; + float dly = -dx; + nvg__vset(dst, px + dlx*w, py + dly*w, u0,1); dst++; + nvg__vset(dst, px - dlx*w, py - dly*w, u1,1); dst++; + nvg__vset(dst, px + dlx*w + dx*aa, py + dly*w + dy*aa, u0,0); dst++; + nvg__vset(dst, px - dlx*w + dx*aa, py - dly*w + dy*aa, u1,0); dst++; + return dst; +} + + +static NVGvertex* nvg__roundCapStart(NVGvertex* dst, NVGpoint* p, + float dx, float dy, float w, int ncap, + float aa, float u0, float u1) +{ + int i; + float px = p->x; + float py = p->y; + float dlx = dy; + float dly = -dx; + NVG_NOTUSED(aa); + for (i = 0; i < ncap; i++) { + float a = i/(float)(ncap-1)*NVG_PI; + float ax = cosf(a) * w, ay = sinf(a) * w; + nvg__vset(dst, px - dlx*ax - dx*ay, py - dly*ax - dy*ay, u0,1); dst++; + nvg__vset(dst, px, py, 0.5f,1); dst++; + } + nvg__vset(dst, px + dlx*w, py + dly*w, u0,1); dst++; + nvg__vset(dst, px - dlx*w, py - dly*w, u1,1); dst++; + return dst; +} + +static NVGvertex* nvg__roundCapEnd(NVGvertex* dst, NVGpoint* p, + float dx, float dy, float w, int ncap, + float aa, float u0, float u1) +{ + int i; + float px = p->x; + float py = p->y; + float dlx = dy; + float dly = -dx; + NVG_NOTUSED(aa); + nvg__vset(dst, px + dlx*w, py + dly*w, u0,1); dst++; + nvg__vset(dst, px - dlx*w, py - dly*w, u1,1); dst++; + for (i = 0; i < ncap; i++) { + float a = i/(float)(ncap-1)*NVG_PI; + float ax = cosf(a) * w, ay = sinf(a) * w; + nvg__vset(dst, px, py, 0.5f,1); dst++; + nvg__vset(dst, px - dlx*ax + dx*ay, py - dly*ax + dy*ay, u0,1); dst++; + } + return dst; +} + + +static void nvg__calculateJoins(NVGcontext* ctx, float w, int lineJoin, float miterLimit) +{ + NVGpathCache* cache = ctx->cache; + int i, j; + float iw = 0.0f; + + if (w > 0.0f) iw = 1.0f / w; + + // Calculate which joins needs extra vertices to append, and gather vertex count. + for (i = 0; i < cache->npaths; i++) { + NVGpath* path = &cache->paths[i]; + NVGpoint* pts = &cache->points[path->first]; + NVGpoint* p0 = &pts[path->count-1]; + NVGpoint* p1 = &pts[0]; + int nleft = 0; + + path->nbevel = 0; + + for (j = 0; j < path->count; j++) { + float dlx0, dly0, dlx1, dly1, dmr2, cross, limit; + dlx0 = p0->dy; + dly0 = -p0->dx; + dlx1 = p1->dy; + dly1 = -p1->dx; + // Calculate extrusions + p1->dmx = (dlx0 + dlx1) * 0.5f; + p1->dmy = (dly0 + dly1) * 0.5f; + dmr2 = p1->dmx*p1->dmx + p1->dmy*p1->dmy; + if (dmr2 > 0.000001f) { + float scale = 1.0f / dmr2; + if (scale > 600.0f) { + scale = 600.0f; + } + p1->dmx *= scale; + p1->dmy *= scale; + } + + // Clear flags, but keep the corner. + p1->flags = (p1->flags & NVG_PT_CORNER) ? NVG_PT_CORNER : 0; + + // Keep track of left turns. + cross = p1->dx * p0->dy - p0->dx * p1->dy; + if (cross > 0.0f) { + nleft++; + p1->flags |= NVG_PT_LEFT; + } + + // Calculate if we should use bevel or miter for inner join. + limit = nvg__maxf(1.01f, nvg__minf(p0->len, p1->len) * iw); + if ((dmr2 * limit*limit) < 1.0f) + p1->flags |= NVG_PR_INNERBEVEL; + + // Check to see if the corner needs to be beveled. + if (p1->flags & NVG_PT_CORNER) { + if ((dmr2 * miterLimit*miterLimit) < 1.0f || lineJoin == NVG_BEVEL || lineJoin == NVG_ROUND) { + p1->flags |= NVG_PT_BEVEL; + } + } + + if ((p1->flags & (NVG_PT_BEVEL | NVG_PR_INNERBEVEL)) != 0) + path->nbevel++; + + p0 = p1++; + } + + path->convex = (nleft == path->count) ? 1 : 0; + } +} + + +static int nvg__expandStroke(NVGcontext* ctx, float w, float fringe, int lineCap, int lineJoin, float miterLimit) +{ + NVGpathCache* cache = ctx->cache; + NVGvertex* verts; + NVGvertex* dst; + int cverts, i, j; + float aa = fringe;//ctx->fringeWidth; + float u0 = 0.0f, u1 = 1.0f; + int ncap = nvg__curveDivs(w, NVG_PI, ctx->tessTol); // Calculate divisions per half circle. + + w += aa * 0.5f; + + // Disable the gradient used for antialiasing when antialiasing is not used. + if (aa == 0.0f) { + u0 = 0.5f; + u1 = 0.5f; + } + + nvg__calculateJoins(ctx, w, lineJoin, miterLimit); + + // Calculate max vertex usage. + cverts = 0; + for (i = 0; i < cache->npaths; i++) { + NVGpath* path = &cache->paths[i]; + int loop = (path->closed == 0) ? 0 : 1; + if (lineJoin == NVG_ROUND) + cverts += (path->count + path->nbevel*(ncap+2) + 1) * 2; // plus one for loop + else + cverts += (path->count + path->nbevel*5 + 1) * 2; // plus one for loop + if (loop == 0) { + // space for caps + if (lineCap == NVG_ROUND) { + cverts += (ncap*2 + 2)*2; + } else { + cverts += (3+3)*2; + } + } + } + + verts = nvg__allocTempVerts(ctx, cverts); + if (verts == NULL) return 0; + + for (i = 0; i < cache->npaths; i++) { + NVGpath* path = &cache->paths[i]; + NVGpoint* pts = &cache->points[path->first]; + NVGpoint* p0; + NVGpoint* p1; + int s, e, loop; + float dx, dy; + + path->fill = 0; + path->nfill = 0; + + // Calculate fringe or stroke + loop = (path->closed == 0) ? 0 : 1; + dst = verts; + path->stroke = dst; + + if (loop) { + // Looping + p0 = &pts[path->count-1]; + p1 = &pts[0]; + s = 0; + e = path->count; + } else { + // Add cap + p0 = &pts[0]; + p1 = &pts[1]; + s = 1; + e = path->count-1; + } + + if (loop == 0) { + // Add cap + dx = p1->x - p0->x; + dy = p1->y - p0->y; + nvg__normalize(&dx, &dy); + if (lineCap == NVG_BUTT) + dst = nvg__buttCapStart(dst, p0, dx, dy, w, -aa*0.5f, aa, u0, u1); + else if (lineCap == NVG_BUTT || lineCap == NVG_SQUARE) + dst = nvg__buttCapStart(dst, p0, dx, dy, w, w-aa, aa, u0, u1); + else if (lineCap == NVG_ROUND) + dst = nvg__roundCapStart(dst, p0, dx, dy, w, ncap, aa, u0, u1); + } + + for (j = s; j < e; ++j) { + if ((p1->flags & (NVG_PT_BEVEL | NVG_PR_INNERBEVEL)) != 0) { + if (lineJoin == NVG_ROUND) { + dst = nvg__roundJoin(dst, p0, p1, w, w, u0, u1, ncap, aa); + } else { + dst = nvg__bevelJoin(dst, p0, p1, w, w, u0, u1, aa); + } + } else { + nvg__vset(dst, p1->x + (p1->dmx * w), p1->y + (p1->dmy * w), u0,1); dst++; + nvg__vset(dst, p1->x - (p1->dmx * w), p1->y - (p1->dmy * w), u1,1); dst++; + } + p0 = p1++; + } + + if (loop) { + // Loop it + nvg__vset(dst, verts[0].x, verts[0].y, u0,1); dst++; + nvg__vset(dst, verts[1].x, verts[1].y, u1,1); dst++; + } else { + // Add cap + dx = p1->x - p0->x; + dy = p1->y - p0->y; + nvg__normalize(&dx, &dy); + if (lineCap == NVG_BUTT) + dst = nvg__buttCapEnd(dst, p1, dx, dy, w, -aa*0.5f, aa, u0, u1); + else if (lineCap == NVG_BUTT || lineCap == NVG_SQUARE) + dst = nvg__buttCapEnd(dst, p1, dx, dy, w, w-aa, aa, u0, u1); + else if (lineCap == NVG_ROUND) + dst = nvg__roundCapEnd(dst, p1, dx, dy, w, ncap, aa, u0, u1); + } + + path->nstroke = (int)(dst - verts); + + verts = dst; + } + + return 1; +} + +static int nvg__expandFill(NVGcontext* ctx, float w, int lineJoin, float miterLimit) +{ + NVGpathCache* cache = ctx->cache; + NVGvertex* verts; + NVGvertex* dst; + int cverts, convex, i, j; + float aa = ctx->fringeWidth; + int fringe = w > 0.0f; + + nvg__calculateJoins(ctx, w, lineJoin, miterLimit); + + // Calculate max vertex usage. + cverts = 0; + for (i = 0; i < cache->npaths; i++) { + NVGpath* path = &cache->paths[i]; + cverts += path->count + path->nbevel + 1; + if (fringe) + cverts += (path->count + path->nbevel*5 + 1) * 2; // plus one for loop + } + + verts = nvg__allocTempVerts(ctx, cverts); + if (verts == NULL) return 0; + + convex = cache->npaths == 1 && cache->paths[0].convex; + + for (i = 0; i < cache->npaths; i++) { + NVGpath* path = &cache->paths[i]; + NVGpoint* pts = &cache->points[path->first]; + NVGpoint* p0; + NVGpoint* p1; + float rw, lw, woff; + float ru, lu; + + // Calculate shape vertices. + woff = 0.5f*aa; + dst = verts; + path->fill = dst; + + if (fringe) { + // Looping + p0 = &pts[path->count-1]; + p1 = &pts[0]; + for (j = 0; j < path->count; ++j) { + if (p1->flags & NVG_PT_BEVEL) { + float dlx0 = p0->dy; + float dly0 = -p0->dx; + float dlx1 = p1->dy; + float dly1 = -p1->dx; + if (p1->flags & NVG_PT_LEFT) { + float lx = p1->x + p1->dmx * woff; + float ly = p1->y + p1->dmy * woff; + nvg__vset(dst, lx, ly, 0.5f,1); dst++; + } else { + float lx0 = p1->x + dlx0 * woff; + float ly0 = p1->y + dly0 * woff; + float lx1 = p1->x + dlx1 * woff; + float ly1 = p1->y + dly1 * woff; + nvg__vset(dst, lx0, ly0, 0.5f,1); dst++; + nvg__vset(dst, lx1, ly1, 0.5f,1); dst++; + } + } else { + nvg__vset(dst, p1->x + (p1->dmx * woff), p1->y + (p1->dmy * woff), 0.5f,1); dst++; + } + p0 = p1++; + } + } else { + for (j = 0; j < path->count; ++j) { + nvg__vset(dst, pts[j].x, pts[j].y, 0.5f,1); + dst++; + } + } + + path->nfill = (int)(dst - verts); + verts = dst; + + // Calculate fringe + if (fringe) { + lw = w + woff; + rw = w - woff; + lu = 0; + ru = 1; + dst = verts; + path->stroke = dst; + + // Create only half a fringe for convex shapes so that + // the shape can be rendered without stenciling. + if (convex) { + lw = woff; // This should generate the same vertex as fill inset above. + lu = 0.5f; // Set outline fade at middle. + } + + // Looping + p0 = &pts[path->count-1]; + p1 = &pts[0]; + + for (j = 0; j < path->count; ++j) { + if ((p1->flags & (NVG_PT_BEVEL | NVG_PR_INNERBEVEL)) != 0) { + dst = nvg__bevelJoin(dst, p0, p1, lw, rw, lu, ru, ctx->fringeWidth); + } else { + nvg__vset(dst, p1->x + (p1->dmx * lw), p1->y + (p1->dmy * lw), lu,1); dst++; + nvg__vset(dst, p1->x - (p1->dmx * rw), p1->y - (p1->dmy * rw), ru,1); dst++; + } + p0 = p1++; + } + + // Loop it + nvg__vset(dst, verts[0].x, verts[0].y, lu,1); dst++; + nvg__vset(dst, verts[1].x, verts[1].y, ru,1); dst++; + + path->nstroke = (int)(dst - verts); + verts = dst; + } else { + path->stroke = NULL; + path->nstroke = 0; + } + } + + return 1; +} + + +// Draw +void nvgBeginPath(NVGcontext* ctx) +{ + ctx->ncommands = 0; + nvg__clearPathCache(ctx); +} + +void nvgMoveTo(NVGcontext* ctx, float x, float y) +{ + float vals[] = { NVG_MOVETO, x, y }; + nvg__appendCommands(ctx, vals, NVG_COUNTOF(vals)); +} + +void nvgLineTo(NVGcontext* ctx, float x, float y) +{ + float vals[] = { NVG_LINETO, x, y }; + nvg__appendCommands(ctx, vals, NVG_COUNTOF(vals)); +} + +void nvgBezierTo(NVGcontext* ctx, float c1x, float c1y, float c2x, float c2y, float x, float y) +{ + float vals[] = { NVG_BEZIERTO, c1x, c1y, c2x, c2y, x, y }; + nvg__appendCommands(ctx, vals, NVG_COUNTOF(vals)); +} + +void nvgQuadTo(NVGcontext* ctx, float cx, float cy, float x, float y) +{ + float x0 = ctx->commandx; + float y0 = ctx->commandy; + float vals[] = { NVG_BEZIERTO, + x0 + 2.0f/3.0f*(cx - x0), y0 + 2.0f/3.0f*(cy - y0), + x + 2.0f/3.0f*(cx - x), y + 2.0f/3.0f*(cy - y), + x, y }; + nvg__appendCommands(ctx, vals, NVG_COUNTOF(vals)); +} + +void nvgArcTo(NVGcontext* ctx, float x1, float y1, float x2, float y2, float radius) +{ + float x0 = ctx->commandx; + float y0 = ctx->commandy; + float dx0,dy0, dx1,dy1, a, d, cx,cy, a0,a1; + int dir; + + if (ctx->ncommands == 0) { + return; + } + + // Handle degenerate cases. + if (nvg__ptEquals(x0,y0, x1,y1, ctx->distTol) || + nvg__ptEquals(x1,y1, x2,y2, ctx->distTol) || + nvg__distPtSeg(x1,y1, x0,y0, x2,y2) < ctx->distTol*ctx->distTol || + radius < ctx->distTol) { + nvgLineTo(ctx, x1,y1); + return; + } + + // Calculate tangential circle to lines (x0,y0)-(x1,y1) and (x1,y1)-(x2,y2). + dx0 = x0-x1; + dy0 = y0-y1; + dx1 = x2-x1; + dy1 = y2-y1; + nvg__normalize(&dx0,&dy0); + nvg__normalize(&dx1,&dy1); + a = nvg__acosf(dx0*dx1 + dy0*dy1); + d = radius / nvg__tanf(a/2.0f); + +// printf("a=%f° d=%f\n", a/NVG_PI*180.0f, d); + + if (d > 10000.0f) { + nvgLineTo(ctx, x1,y1); + return; + } + + if (nvg__cross(dx0,dy0, dx1,dy1) > 0.0f) { + cx = x1 + dx0*d + dy0*radius; + cy = y1 + dy0*d + -dx0*radius; + a0 = nvg__atan2f(dx0, -dy0); + a1 = nvg__atan2f(-dx1, dy1); + dir = NVG_CW; +// printf("CW c=(%f, %f) a0=%f° a1=%f°\n", cx, cy, a0/NVG_PI*180.0f, a1/NVG_PI*180.0f); + } else { + cx = x1 + dx0*d + -dy0*radius; + cy = y1 + dy0*d + dx0*radius; + a0 = nvg__atan2f(-dx0, dy0); + a1 = nvg__atan2f(dx1, -dy1); + dir = NVG_CCW; +// printf("CCW c=(%f, %f) a0=%f° a1=%f°\n", cx, cy, a0/NVG_PI*180.0f, a1/NVG_PI*180.0f); + } + + nvgArc(ctx, cx, cy, radius, a0, a1, dir); +} + +void nvgClosePath(NVGcontext* ctx) +{ + float vals[] = { NVG_CLOSE }; + nvg__appendCommands(ctx, vals, NVG_COUNTOF(vals)); +} + +void nvgPathWinding(NVGcontext* ctx, int dir) +{ + float vals[] = { NVG_WINDING, (float)dir }; + nvg__appendCommands(ctx, vals, NVG_COUNTOF(vals)); +} + +void nvgArc(NVGcontext* ctx, float cx, float cy, float r, float a0, float a1, int dir) +{ + float a = 0, da = 0, hda = 0, kappa = 0; + float dx = 0, dy = 0, x = 0, y = 0, tanx = 0, tany = 0; + float px = 0, py = 0, ptanx = 0, ptany = 0; + float vals[3 + 5*7 + 100]; + int i, ndivs, nvals; + int move = ctx->ncommands > 0 ? NVG_LINETO : NVG_MOVETO; + + // Clamp angles + da = a1 - a0; + if (dir == NVG_CW) { + if (nvg__absf(da) >= NVG_PI*2) { + da = NVG_PI*2; + } else { + while (da < 0.0f) da += NVG_PI*2; + } + } else { + if (nvg__absf(da) >= NVG_PI*2) { + da = -NVG_PI*2; + } else { + while (da > 0.0f) da -= NVG_PI*2; + } + } + + // Split arc into max 90 degree segments. + ndivs = nvg__maxi(1, nvg__mini((int)(nvg__absf(da) / (NVG_PI*0.5f) + 0.5f), 5)); + hda = (da / (float)ndivs) / 2.0f; + kappa = nvg__absf(4.0f / 3.0f * (1.0f - nvg__cosf(hda)) / nvg__sinf(hda)); + + if (dir == NVG_CCW) + kappa = -kappa; + + nvals = 0; + for (i = 0; i <= ndivs; i++) { + a = a0 + da * (i/(float)ndivs); + dx = nvg__cosf(a); + dy = nvg__sinf(a); + x = cx + dx*r; + y = cy + dy*r; + tanx = -dy*r*kappa; + tany = dx*r*kappa; + + if (i == 0) { + vals[nvals++] = (float)move; + vals[nvals++] = x; + vals[nvals++] = y; + } else { + vals[nvals++] = NVG_BEZIERTO; + vals[nvals++] = px+ptanx; + vals[nvals++] = py+ptany; + vals[nvals++] = x-tanx; + vals[nvals++] = y-tany; + vals[nvals++] = x; + vals[nvals++] = y; + } + px = x; + py = y; + ptanx = tanx; + ptany = tany; + } + + nvg__appendCommands(ctx, vals, nvals); +} + +void nvgRect(NVGcontext* ctx, float x, float y, float w, float h) +{ + float vals[] = { + NVG_MOVETO, x,y, + NVG_LINETO, x,y+h, + NVG_LINETO, x+w,y+h, + NVG_LINETO, x+w,y, + NVG_CLOSE + }; + nvg__appendCommands(ctx, vals, NVG_COUNTOF(vals)); +} + +void nvgRoundedRect(NVGcontext* ctx, float x, float y, float w, float h, float r) +{ + nvgRoundedRectVarying(ctx, x, y, w, h, r, r, r, r); +} + +void nvgRoundedRectVarying(NVGcontext* ctx, float x, float y, float w, float h, float radTopLeft, float radTopRight, float radBottomRight, float radBottomLeft) +{ + if(radTopLeft < 0.1f && radTopRight < 0.1f && radBottomRight < 0.1f && radBottomLeft < 0.1f) { + nvgRect(ctx, x, y, w, h); + return; + } else { + float halfw = nvg__absf(w)*0.5f; + float halfh = nvg__absf(h)*0.5f; + float rxBL = nvg__minf(radBottomLeft, halfw) * nvg__signf(w), ryBL = nvg__minf(radBottomLeft, halfh) * nvg__signf(h); + float rxBR = nvg__minf(radBottomRight, halfw) * nvg__signf(w), ryBR = nvg__minf(radBottomRight, halfh) * nvg__signf(h); + float rxTR = nvg__minf(radTopRight, halfw) * nvg__signf(w), ryTR = nvg__minf(radTopRight, halfh) * nvg__signf(h); + float rxTL = nvg__minf(radTopLeft, halfw) * nvg__signf(w), ryTL = nvg__minf(radTopLeft, halfh) * nvg__signf(h); + float vals[] = { + NVG_MOVETO, x, y + ryTL, + NVG_LINETO, x, y + h - ryBL, + NVG_BEZIERTO, x, y + h - ryBL*(1 - NVG_KAPPA90), x + rxBL*(1 - NVG_KAPPA90), y + h, x + rxBL, y + h, + NVG_LINETO, x + w - rxBR, y + h, + NVG_BEZIERTO, x + w - rxBR*(1 - NVG_KAPPA90), y + h, x + w, y + h - ryBR*(1 - NVG_KAPPA90), x + w, y + h - ryBR, + NVG_LINETO, x + w, y + ryTR, + NVG_BEZIERTO, x + w, y + ryTR*(1 - NVG_KAPPA90), x + w - rxTR*(1 - NVG_KAPPA90), y, x + w - rxTR, y, + NVG_LINETO, x + rxTL, y, + NVG_BEZIERTO, x + rxTL*(1 - NVG_KAPPA90), y, x, y + ryTL*(1 - NVG_KAPPA90), x, y + ryTL, + NVG_CLOSE + }; + nvg__appendCommands(ctx, vals, NVG_COUNTOF(vals)); + } +} + +void nvgEllipse(NVGcontext* ctx, float cx, float cy, float rx, float ry) +{ + float vals[] = { + NVG_MOVETO, cx-rx, cy, + NVG_BEZIERTO, cx-rx, cy+ry*NVG_KAPPA90, cx-rx*NVG_KAPPA90, cy+ry, cx, cy+ry, + NVG_BEZIERTO, cx+rx*NVG_KAPPA90, cy+ry, cx+rx, cy+ry*NVG_KAPPA90, cx+rx, cy, + NVG_BEZIERTO, cx+rx, cy-ry*NVG_KAPPA90, cx+rx*NVG_KAPPA90, cy-ry, cx, cy-ry, + NVG_BEZIERTO, cx-rx*NVG_KAPPA90, cy-ry, cx-rx, cy-ry*NVG_KAPPA90, cx-rx, cy, + NVG_CLOSE + }; + nvg__appendCommands(ctx, vals, NVG_COUNTOF(vals)); +} + +void nvgCircle(NVGcontext* ctx, float cx, float cy, float r) +{ + nvgEllipse(ctx, cx,cy, r,r); +} + +void nvgDebugDumpPathCache(NVGcontext* ctx) +{ + const NVGpath* path; + int i, j; + + printf("Dumping %d cached paths\n", ctx->cache->npaths); + for (i = 0; i < ctx->cache->npaths; i++) { + path = &ctx->cache->paths[i]; + printf(" - Path %d\n", i); + if (path->nfill) { + printf(" - fill: %d\n", path->nfill); + for (j = 0; j < path->nfill; j++) + printf("%f\t%f\n", path->fill[j].x, path->fill[j].y); + } + if (path->nstroke) { + printf(" - stroke: %d\n", path->nstroke); + for (j = 0; j < path->nstroke; j++) + printf("%f\t%f\n", path->stroke[j].x, path->stroke[j].y); + } + } +} + +void nvgFill(NVGcontext* ctx) +{ + NVGstate* state = nvg__getState(ctx); + const NVGpath* path; + NVGpaint fillPaint = state->fill; + int i; + + nvg__flattenPaths(ctx); + if (ctx->params.edgeAntiAlias && state->shapeAntiAlias) + nvg__expandFill(ctx, ctx->fringeWidth, NVG_MITER, 2.4f); + else + nvg__expandFill(ctx, 0.0f, NVG_MITER, 2.4f); + + // Apply global alpha + fillPaint.innerColor.a *= state->alpha; + fillPaint.outerColor.a *= state->alpha; + + ctx->params.renderFill(ctx->params.userPtr, &fillPaint, state->compositeOperation, &state->scissor, ctx->fringeWidth, + ctx->cache->bounds, ctx->cache->paths, ctx->cache->npaths); + + // Count triangles + for (i = 0; i < ctx->cache->npaths; i++) { + path = &ctx->cache->paths[i]; + ctx->fillTriCount += path->nfill-2; + ctx->fillTriCount += path->nstroke-2; + ctx->drawCallCount += 2; + } +} + +void nvgStroke(NVGcontext* ctx) +{ + NVGstate* state = nvg__getState(ctx); + float scale = nvg__getAverageScale(state->xform); + float strokeWidth = nvg__clampf(state->strokeWidth * scale, 0.0f, 200.0f); + NVGpaint strokePaint = state->stroke; + const NVGpath* path; + int i; + + + if (strokeWidth < ctx->fringeWidth) { + // If the stroke width is less than pixel size, use alpha to emulate coverage. + // Since coverage is area, scale by alpha*alpha. + float alpha = nvg__clampf(strokeWidth / ctx->fringeWidth, 0.0f, 1.0f); + strokePaint.innerColor.a *= alpha*alpha; + strokePaint.outerColor.a *= alpha*alpha; + strokeWidth = ctx->fringeWidth; + } + + // Apply global alpha + strokePaint.innerColor.a *= state->alpha; + strokePaint.outerColor.a *= state->alpha; + + nvg__flattenPaths(ctx); + + if (ctx->params.edgeAntiAlias && state->shapeAntiAlias) + nvg__expandStroke(ctx, strokeWidth*0.5f, ctx->fringeWidth, state->lineCap, state->lineJoin, state->miterLimit); + else + nvg__expandStroke(ctx, strokeWidth*0.5f, 0.0f, state->lineCap, state->lineJoin, state->miterLimit); + + ctx->params.renderStroke(ctx->params.userPtr, &strokePaint, state->compositeOperation, &state->scissor, ctx->fringeWidth, + strokeWidth, ctx->cache->paths, ctx->cache->npaths); + + // Count triangles + for (i = 0; i < ctx->cache->npaths; i++) { + path = &ctx->cache->paths[i]; + ctx->strokeTriCount += path->nstroke-2; + ctx->drawCallCount++; + } +} + +// Add fonts +int nvgCreateFont(NVGcontext* ctx, const char* name, const char* filename) +{ + return fonsAddFont(ctx->fs, name, filename, 0); +} + +int nvgCreateFontAtIndex(NVGcontext* ctx, const char* name, const char* filename, const int fontIndex) +{ + return fonsAddFont(ctx->fs, name, filename, fontIndex); +} + +int nvgCreateFontMem(NVGcontext* ctx, const char* name, unsigned char* data, int ndata, int freeData) +{ + return fonsAddFontMem(ctx->fs, name, data, ndata, freeData, 0); +} + +int nvgCreateFontMemAtIndex(NVGcontext* ctx, const char* name, unsigned char* data, int ndata, int freeData, const int fontIndex) +{ + return fonsAddFontMem(ctx->fs, name, data, ndata, freeData, fontIndex); +} + +int nvgFindFont(NVGcontext* ctx, const char* name) +{ + if (name == NULL) return -1; + return fonsGetFontByName(ctx->fs, name); +} + + +int nvgAddFallbackFontId(NVGcontext* ctx, int baseFont, int fallbackFont) +{ + if(baseFont == -1 || fallbackFont == -1) return 0; + return fonsAddFallbackFont(ctx->fs, baseFont, fallbackFont); +} + +int nvgAddFallbackFont(NVGcontext* ctx, const char* baseFont, const char* fallbackFont) +{ + return nvgAddFallbackFontId(ctx, nvgFindFont(ctx, baseFont), nvgFindFont(ctx, fallbackFont)); +} + +void nvgResetFallbackFontsId(NVGcontext* ctx, int baseFont) +{ + fonsResetFallbackFont(ctx->fs, baseFont); +} + +void nvgResetFallbackFonts(NVGcontext* ctx, const char* baseFont) +{ + nvgResetFallbackFontsId(ctx, nvgFindFont(ctx, baseFont)); +} + +// State setting +void nvgFontSize(NVGcontext* ctx, float size) +{ + NVGstate* state = nvg__getState(ctx); + state->fontSize = size; +} + +void nvgFontBlur(NVGcontext* ctx, float blur) +{ + NVGstate* state = nvg__getState(ctx); + state->fontBlur = blur; +} + +void nvgTextLetterSpacing(NVGcontext* ctx, float spacing) +{ + NVGstate* state = nvg__getState(ctx); + state->letterSpacing = spacing; +} + +void nvgTextLineHeight(NVGcontext* ctx, float lineHeight) +{ + NVGstate* state = nvg__getState(ctx); + state->lineHeight = lineHeight; +} + +void nvgTextAlign(NVGcontext* ctx, int align) +{ + NVGstate* state = nvg__getState(ctx); + state->textAlign = align; +} + +void nvgFontFaceId(NVGcontext* ctx, int font) +{ + NVGstate* state = nvg__getState(ctx); + state->fontId = font; +} + +void nvgFontFace(NVGcontext* ctx, const char* font) +{ + NVGstate* state = nvg__getState(ctx); + state->fontId = fonsGetFontByName(ctx->fs, font); +} + +static float nvg__quantize(float a, float d) +{ + return ((int)(a / d + 0.5f)) * d; +} + +static float nvg__getFontScale(NVGstate* state) +{ + return nvg__minf(nvg__quantize(nvg__getAverageScale(state->xform), 0.01f), 4.0f); +} + +static void nvg__flushTextTexture(NVGcontext* ctx) +{ + int dirty[4]; + + if (fonsValidateTexture(ctx->fs, dirty)) { + int fontImage = ctx->fontImages[ctx->fontImageIdx]; + // Update texture + if (fontImage != 0) { + int iw, ih; + const unsigned char* data = fonsGetTextureData(ctx->fs, &iw, &ih); + int x = dirty[0]; + int y = dirty[1]; + int w = dirty[2] - dirty[0]; + int h = dirty[3] - dirty[1]; + ctx->params.renderUpdateTexture(ctx->params.userPtr, fontImage, x,y, w,h, data); + } + } +} + +static int nvg__allocTextAtlas(NVGcontext* ctx) +{ + int iw, ih; + nvg__flushTextTexture(ctx); + if (ctx->fontImageIdx >= NVG_MAX_FONTIMAGES-1) + return 0; + // if next fontImage already have a texture + if (ctx->fontImages[ctx->fontImageIdx+1] != 0) + nvgImageSize(ctx, ctx->fontImages[ctx->fontImageIdx+1], &iw, &ih); + else { // calculate the new font image size and create it. + nvgImageSize(ctx, ctx->fontImages[ctx->fontImageIdx], &iw, &ih); + if (iw > ih) + ih *= 2; + else + iw *= 2; + if (iw > NVG_MAX_FONTIMAGE_SIZE || ih > NVG_MAX_FONTIMAGE_SIZE) + iw = ih = NVG_MAX_FONTIMAGE_SIZE; + ctx->fontImages[ctx->fontImageIdx+1] = ctx->params.renderCreateTexture(ctx->params.userPtr, NVG_TEXTURE_ALPHA, iw, ih, 0, NULL); + } + ++ctx->fontImageIdx; + fonsResetAtlas(ctx->fs, iw, ih); + return 1; +} + +static void nvg__renderText(NVGcontext* ctx, NVGvertex* verts, int nverts) +{ + NVGstate* state = nvg__getState(ctx); + NVGpaint paint = state->fill; + + // Render triangles. + paint.image = ctx->fontImages[ctx->fontImageIdx]; + + // Apply global alpha + paint.innerColor.a *= state->alpha; + paint.outerColor.a *= state->alpha; + + ctx->params.renderTriangles(ctx->params.userPtr, &paint, state->compositeOperation, &state->scissor, verts, nverts, ctx->fringeWidth); + + ctx->drawCallCount++; + ctx->textTriCount += nverts/3; +} + +float nvgText(NVGcontext* ctx, float x, float y, const char* string, const char* end) +{ + NVGstate* state = nvg__getState(ctx); + FONStextIter iter, prevIter; + FONSquad q; + NVGvertex* verts; + float scale = nvg__getFontScale(state) * ctx->devicePxRatio; + float invscale = 1.0f / scale; + int cverts = 0; + int nverts = 0; + + if (end == NULL) + end = string + strlen(string); + + if (state->fontId == FONS_INVALID) return x; + + fonsSetSize(ctx->fs, state->fontSize*scale); + fonsSetSpacing(ctx->fs, state->letterSpacing*scale); + fonsSetBlur(ctx->fs, state->fontBlur*scale); + fonsSetAlign(ctx->fs, state->textAlign); + fonsSetFont(ctx->fs, state->fontId); + + cverts = nvg__maxi(2, (int)(end - string)) * 6; // conservative estimate. + verts = nvg__allocTempVerts(ctx, cverts); + if (verts == NULL) return x; + + fonsTextIterInit(ctx->fs, &iter, x*scale, y*scale, string, end, FONS_GLYPH_BITMAP_REQUIRED); + prevIter = iter; + while (fonsTextIterNext(ctx->fs, &iter, &q)) { + float c[4*2]; + if (iter.prevGlyphIndex == -1) { // can not retrieve glyph? + if (nverts != 0) { + nvg__renderText(ctx, verts, nverts); + nverts = 0; + } + if (!nvg__allocTextAtlas(ctx)) + break; // no memory :( + iter = prevIter; + fonsTextIterNext(ctx->fs, &iter, &q); // try again + if (iter.prevGlyphIndex == -1) // still can not find glyph? + break; + } + prevIter = iter; + // Transform corners. + nvgTransformPoint(&c[0],&c[1], state->xform, q.x0*invscale, q.y0*invscale); + nvgTransformPoint(&c[2],&c[3], state->xform, q.x1*invscale, q.y0*invscale); + nvgTransformPoint(&c[4],&c[5], state->xform, q.x1*invscale, q.y1*invscale); + nvgTransformPoint(&c[6],&c[7], state->xform, q.x0*invscale, q.y1*invscale); + // Create triangles + if (nverts+6 <= cverts) { + nvg__vset(&verts[nverts], c[0], c[1], q.s0, q.t0); nverts++; + nvg__vset(&verts[nverts], c[4], c[5], q.s1, q.t1); nverts++; + nvg__vset(&verts[nverts], c[2], c[3], q.s1, q.t0); nverts++; + nvg__vset(&verts[nverts], c[0], c[1], q.s0, q.t0); nverts++; + nvg__vset(&verts[nverts], c[6], c[7], q.s0, q.t1); nverts++; + nvg__vset(&verts[nverts], c[4], c[5], q.s1, q.t1); nverts++; + } + } + + // TODO: add back-end bit to do this just once per frame. + nvg__flushTextTexture(ctx); + + nvg__renderText(ctx, verts, nverts); + + return iter.nextx / scale; +} + +void nvgTextBox(NVGcontext* ctx, float x, float y, float breakRowWidth, const char* string, const char* end) +{ + NVGstate* state = nvg__getState(ctx); + NVGtextRow rows[2]; + int nrows = 0, i; + int oldAlign = state->textAlign; + int haling = state->textAlign & (NVG_ALIGN_LEFT | NVG_ALIGN_CENTER | NVG_ALIGN_RIGHT); + int valign = state->textAlign & (NVG_ALIGN_TOP | NVG_ALIGN_MIDDLE | NVG_ALIGN_BOTTOM | NVG_ALIGN_BASELINE); + float lineh = 0; + + if (state->fontId == FONS_INVALID) return; + + nvgTextMetrics(ctx, NULL, NULL, &lineh); + + state->textAlign = NVG_ALIGN_LEFT | valign; + + while ((nrows = nvgTextBreakLines(ctx, string, end, breakRowWidth, rows, 2))) { + for (i = 0; i < nrows; i++) { + NVGtextRow* row = &rows[i]; + if (haling & NVG_ALIGN_LEFT) + nvgText(ctx, x, y, row->start, row->end); + else if (haling & NVG_ALIGN_CENTER) + nvgText(ctx, x + breakRowWidth*0.5f - row->width*0.5f, y, row->start, row->end); + else if (haling & NVG_ALIGN_RIGHT) + nvgText(ctx, x + breakRowWidth - row->width, y, row->start, row->end); + y += lineh * state->lineHeight; + } + string = rows[nrows-1].next; + } + + state->textAlign = oldAlign; +} + +int nvgTextGlyphPositions(NVGcontext* ctx, float x, float y, const char* string, const char* end, NVGglyphPosition* positions, int maxPositions) +{ + NVGstate* state = nvg__getState(ctx); + float scale = nvg__getFontScale(state) * ctx->devicePxRatio; + float invscale = 1.0f / scale; + FONStextIter iter, prevIter; + FONSquad q; + int npos = 0; + + if (state->fontId == FONS_INVALID) return 0; + + if (end == NULL) + end = string + strlen(string); + + if (string == end) + return 0; + + fonsSetSize(ctx->fs, state->fontSize*scale); + fonsSetSpacing(ctx->fs, state->letterSpacing*scale); + fonsSetBlur(ctx->fs, state->fontBlur*scale); + fonsSetAlign(ctx->fs, state->textAlign); + fonsSetFont(ctx->fs, state->fontId); + + fonsTextIterInit(ctx->fs, &iter, x*scale, y*scale, string, end, FONS_GLYPH_BITMAP_OPTIONAL); + prevIter = iter; + while (fonsTextIterNext(ctx->fs, &iter, &q)) { + if (iter.prevGlyphIndex < 0 && nvg__allocTextAtlas(ctx)) { // can not retrieve glyph? + iter = prevIter; + fonsTextIterNext(ctx->fs, &iter, &q); // try again + } + prevIter = iter; + positions[npos].str = iter.str; + positions[npos].x = iter.x * invscale; + positions[npos].minx = nvg__minf(iter.x, q.x0) * invscale; + positions[npos].maxx = nvg__maxf(iter.nextx, q.x1) * invscale; + npos++; + if (npos >= maxPositions) + break; + } + + return npos; +} + +enum NVGcodepointType { + NVG_SPACE, + NVG_NEWLINE, + NVG_CHAR, + NVG_CJK_CHAR, +}; + +int nvgTextBreakLines(NVGcontext* ctx, const char* string, const char* end, float breakRowWidth, NVGtextRow* rows, int maxRows) +{ + NVGstate* state = nvg__getState(ctx); + float scale = nvg__getFontScale(state) * ctx->devicePxRatio; + float invscale = 1.0f / scale; + FONStextIter iter, prevIter; + FONSquad q; + int nrows = 0; + float rowStartX = 0; + float rowWidth = 0; + float rowMinX = 0; + float rowMaxX = 0; + const char* rowStart = NULL; + const char* rowEnd = NULL; + const char* wordStart = NULL; + float wordStartX = 0; + float wordMinX = 0; + const char* breakEnd = NULL; + float breakWidth = 0; + float breakMaxX = 0; + int type = NVG_SPACE, ptype = NVG_SPACE; + unsigned int pcodepoint = 0; + + if (maxRows == 0) return 0; + if (state->fontId == FONS_INVALID) return 0; + + if (end == NULL) + end = string + strlen(string); + + if (string == end) return 0; + + fonsSetSize(ctx->fs, state->fontSize*scale); + fonsSetSpacing(ctx->fs, state->letterSpacing*scale); + fonsSetBlur(ctx->fs, state->fontBlur*scale); + fonsSetAlign(ctx->fs, state->textAlign); + fonsSetFont(ctx->fs, state->fontId); + + breakRowWidth *= scale; + + fonsTextIterInit(ctx->fs, &iter, 0, 0, string, end, FONS_GLYPH_BITMAP_OPTIONAL); + prevIter = iter; + while (fonsTextIterNext(ctx->fs, &iter, &q)) { + if (iter.prevGlyphIndex < 0 && nvg__allocTextAtlas(ctx)) { // can not retrieve glyph? + iter = prevIter; + fonsTextIterNext(ctx->fs, &iter, &q); // try again + } + prevIter = iter; + switch (iter.codepoint) { + case 9: // \t + case 11: // \v + case 12: // \f + case 32: // space + case 0x00a0: // NBSP + type = NVG_SPACE; + break; + case 10: // \n + type = pcodepoint == 13 ? NVG_SPACE : NVG_NEWLINE; + break; + case 13: // \r + type = pcodepoint == 10 ? NVG_SPACE : NVG_NEWLINE; + break; + case 0x0085: // NEL + type = NVG_NEWLINE; + break; + default: + if ((iter.codepoint >= 0x4E00 && iter.codepoint <= 0x9FFF) || + (iter.codepoint >= 0x3000 && iter.codepoint <= 0x30FF) || + (iter.codepoint >= 0xFF00 && iter.codepoint <= 0xFFEF) || + (iter.codepoint >= 0x1100 && iter.codepoint <= 0x11FF) || + (iter.codepoint >= 0x3130 && iter.codepoint <= 0x318F) || + (iter.codepoint >= 0xAC00 && iter.codepoint <= 0xD7AF)) + type = NVG_CJK_CHAR; + else + type = NVG_CHAR; + break; + } + + if (type == NVG_NEWLINE) { + // Always handle new lines. + rows[nrows].start = rowStart != NULL ? rowStart : iter.str; + rows[nrows].end = rowEnd != NULL ? rowEnd : iter.str; + rows[nrows].width = rowWidth * invscale; + rows[nrows].minx = rowMinX * invscale; + rows[nrows].maxx = rowMaxX * invscale; + rows[nrows].next = iter.next; + nrows++; + if (nrows >= maxRows) + return nrows; + // Set null break point + breakEnd = rowStart; + breakWidth = 0.0; + breakMaxX = 0.0; + // Indicate to skip the white space at the beginning of the row. + rowStart = NULL; + rowEnd = NULL; + rowWidth = 0; + rowMinX = rowMaxX = 0; + } else { + if (rowStart == NULL) { + // Skip white space until the beginning of the line + if (type == NVG_CHAR || type == NVG_CJK_CHAR) { + // The current char is the row so far + rowStartX = iter.x; + rowStart = iter.str; + rowEnd = iter.next; + rowWidth = iter.nextx - rowStartX; + rowMinX = q.x0 - rowStartX; + rowMaxX = q.x1 - rowStartX; + wordStart = iter.str; + wordStartX = iter.x; + wordMinX = q.x0 - rowStartX; + // Set null break point + breakEnd = rowStart; + breakWidth = 0.0; + breakMaxX = 0.0; + } + } else { + float nextWidth = iter.nextx - rowStartX; + + // track last non-white space character + if (type == NVG_CHAR || type == NVG_CJK_CHAR) { + rowEnd = iter.next; + rowWidth = iter.nextx - rowStartX; + rowMaxX = q.x1 - rowStartX; + } + // track last end of a word + if (((ptype == NVG_CHAR || ptype == NVG_CJK_CHAR) && type == NVG_SPACE) || type == NVG_CJK_CHAR) { + breakEnd = iter.str; + breakWidth = rowWidth; + breakMaxX = rowMaxX; + } + // track last beginning of a word + if ((ptype == NVG_SPACE && (type == NVG_CHAR || type == NVG_CJK_CHAR)) || type == NVG_CJK_CHAR) { + wordStart = iter.str; + wordStartX = iter.x; + wordMinX = q.x0; + } + + // Break to new line when a character is beyond break width. + if ((type == NVG_CHAR || type == NVG_CJK_CHAR) && nextWidth > breakRowWidth) { + // The run length is too long, need to break to new line. + if (breakEnd == rowStart) { + // The current word is longer than the row length, just break it from here. + rows[nrows].start = rowStart; + rows[nrows].end = iter.str; + rows[nrows].width = rowWidth * invscale; + rows[nrows].minx = rowMinX * invscale; + rows[nrows].maxx = rowMaxX * invscale; + rows[nrows].next = iter.str; + nrows++; + if (nrows >= maxRows) + return nrows; + rowStartX = iter.x; + rowStart = iter.str; + rowEnd = iter.next; + rowWidth = iter.nextx - rowStartX; + rowMinX = q.x0 - rowStartX; + rowMaxX = q.x1 - rowStartX; + wordStart = iter.str; + wordStartX = iter.x; + wordMinX = q.x0 - rowStartX; + } else { + // Break the line from the end of the last word, and start new line from the beginning of the new. + rows[nrows].start = rowStart; + rows[nrows].end = breakEnd; + rows[nrows].width = breakWidth * invscale; + rows[nrows].minx = rowMinX * invscale; + rows[nrows].maxx = breakMaxX * invscale; + rows[nrows].next = wordStart; + nrows++; + if (nrows >= maxRows) + return nrows; + // Update row + rowStartX = wordStartX; + rowStart = wordStart; + rowEnd = iter.next; + rowWidth = iter.nextx - rowStartX; + rowMinX = wordMinX - rowStartX; + rowMaxX = q.x1 - rowStartX; + } + // Set null break point + breakEnd = rowStart; + breakWidth = 0.0; + breakMaxX = 0.0; + } + } + } + + pcodepoint = iter.codepoint; + ptype = type; + } + + // Break the line from the end of the last word, and start new line from the beginning of the new. + if (rowStart != NULL) { + rows[nrows].start = rowStart; + rows[nrows].end = rowEnd; + rows[nrows].width = rowWidth * invscale; + rows[nrows].minx = rowMinX * invscale; + rows[nrows].maxx = rowMaxX * invscale; + rows[nrows].next = end; + nrows++; + } + + return nrows; +} + +float nvgTextBounds(NVGcontext* ctx, float x, float y, const char* string, const char* end, float* bounds) +{ + NVGstate* state = nvg__getState(ctx); + float scale = nvg__getFontScale(state) * ctx->devicePxRatio; + float invscale = 1.0f / scale; + float width; + + if (state->fontId == FONS_INVALID) return 0; + + fonsSetSize(ctx->fs, state->fontSize*scale); + fonsSetSpacing(ctx->fs, state->letterSpacing*scale); + fonsSetBlur(ctx->fs, state->fontBlur*scale); + fonsSetAlign(ctx->fs, state->textAlign); + fonsSetFont(ctx->fs, state->fontId); + + width = fonsTextBounds(ctx->fs, x*scale, y*scale, string, end, bounds); + if (bounds != NULL) { + // Use line bounds for height. + fonsLineBounds(ctx->fs, y*scale, &bounds[1], &bounds[3]); + bounds[0] *= invscale; + bounds[1] *= invscale; + bounds[2] *= invscale; + bounds[3] *= invscale; + } + return width * invscale; +} + +void nvgTextBoxBounds(NVGcontext* ctx, float x, float y, float breakRowWidth, const char* string, const char* end, float* bounds) +{ + NVGstate* state = nvg__getState(ctx); + NVGtextRow rows[2]; + float scale = nvg__getFontScale(state) * ctx->devicePxRatio; + float invscale = 1.0f / scale; + int nrows = 0, i; + int oldAlign = state->textAlign; + int haling = state->textAlign & (NVG_ALIGN_LEFT | NVG_ALIGN_CENTER | NVG_ALIGN_RIGHT); + int valign = state->textAlign & (NVG_ALIGN_TOP | NVG_ALIGN_MIDDLE | NVG_ALIGN_BOTTOM | NVG_ALIGN_BASELINE); + float lineh = 0, rminy = 0, rmaxy = 0; + float minx, miny, maxx, maxy; + + if (state->fontId == FONS_INVALID) { + if (bounds != NULL) + bounds[0] = bounds[1] = bounds[2] = bounds[3] = 0.0f; + return; + } + + nvgTextMetrics(ctx, NULL, NULL, &lineh); + + state->textAlign = NVG_ALIGN_LEFT | valign; + + minx = maxx = x; + miny = maxy = y; + + fonsSetSize(ctx->fs, state->fontSize*scale); + fonsSetSpacing(ctx->fs, state->letterSpacing*scale); + fonsSetBlur(ctx->fs, state->fontBlur*scale); + fonsSetAlign(ctx->fs, state->textAlign); + fonsSetFont(ctx->fs, state->fontId); + fonsLineBounds(ctx->fs, 0, &rminy, &rmaxy); + rminy *= invscale; + rmaxy *= invscale; + + while ((nrows = nvgTextBreakLines(ctx, string, end, breakRowWidth, rows, 2))) { + for (i = 0; i < nrows; i++) { + NVGtextRow* row = &rows[i]; + float rminx, rmaxx, dx = 0; + // Horizontal bounds + if (haling & NVG_ALIGN_LEFT) + dx = 0; + else if (haling & NVG_ALIGN_CENTER) + dx = breakRowWidth*0.5f - row->width*0.5f; + else if (haling & NVG_ALIGN_RIGHT) + dx = breakRowWidth - row->width; + rminx = x + row->minx + dx; + rmaxx = x + row->maxx + dx; + minx = nvg__minf(minx, rminx); + maxx = nvg__maxf(maxx, rmaxx); + // Vertical bounds. + miny = nvg__minf(miny, y + rminy); + maxy = nvg__maxf(maxy, y + rmaxy); + + y += lineh * state->lineHeight; + } + string = rows[nrows-1].next; + } + + state->textAlign = oldAlign; + + if (bounds != NULL) { + bounds[0] = minx; + bounds[1] = miny; + bounds[2] = maxx; + bounds[3] = maxy; + } +} + +void nvgTextMetrics(NVGcontext* ctx, float* ascender, float* descender, float* lineh) +{ + NVGstate* state = nvg__getState(ctx); + float scale = nvg__getFontScale(state) * ctx->devicePxRatio; + float invscale = 1.0f / scale; + + if (state->fontId == FONS_INVALID) return; + + fonsSetSize(ctx->fs, state->fontSize*scale); + fonsSetSpacing(ctx->fs, state->letterSpacing*scale); + fonsSetBlur(ctx->fs, state->fontBlur*scale); + fonsSetAlign(ctx->fs, state->textAlign); + fonsSetFont(ctx->fs, state->fontId); + + fonsVertMetrics(ctx->fs, ascender, descender, lineh); + if (ascender != NULL) + *ascender *= invscale; + if (descender != NULL) + *descender *= invscale; + if (lineh != NULL) + *lineh *= invscale; +} +// vim: ft=c nu noet ts=4 diff --git a/troposphere/daybreak/source/ams_su.c b/troposphere/daybreak/source/ams_su.c new file mode 100644 index 000000000..a5ef3282b --- /dev/null +++ b/troposphere/daybreak/source/ams_su.c @@ -0,0 +1,158 @@ +/* + * Copyright (c) 2018-2020 Atmosphère-NX + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see . + */ +#include +#include +#include "ams_su.h" +#include "service_guard.h" + +static Service g_amssuSrv; +static TransferMemory g_tmem; + +NX_GENERATE_SERVICE_GUARD(amssu); + +Result _amssuInitialize(void) { + return smGetService(&g_amssuSrv, "ams:su"); +} + +void _amssuCleanup(void) { + serviceClose(&g_amssuSrv); + tmemClose(&g_tmem); +} + +Service *amssuGetServiceSession(void) { + return &g_amssuSrv; +} + +Result amssuGetUpdateInformation(AmsSuUpdateInformation *out, const char *path) { + char send_path[FS_MAX_PATH] = {0}; + strncpy(send_path, path, FS_MAX_PATH-1); + send_path[FS_MAX_PATH-1] = 0; + + return serviceDispatchOut(&g_amssuSrv, 0, *out, + .buffer_attrs = { SfBufferAttr_In | SfBufferAttr_HipcPointer | SfBufferAttr_FixedSize }, + .buffers = { { send_path, FS_MAX_PATH } }, + ); +} + +Result amssuValidateUpdate(AmsSuUpdateValidationInfo *out, const char *path) { + char send_path[FS_MAX_PATH] = {0}; + strncpy(send_path, path, FS_MAX_PATH-1); + send_path[FS_MAX_PATH-1] = 0; + + return serviceDispatchOut(&g_amssuSrv, 1, *out, + .buffer_attrs = { SfBufferAttr_In | SfBufferAttr_HipcPointer | SfBufferAttr_FixedSize }, + .buffers = { { send_path, FS_MAX_PATH } }, + ); +} + +Result amssuSetupUpdate(void *buffer, size_t size, const char *path, bool exfat) { + Result rc = 0; + + if (buffer == NULL) { + rc = tmemCreate(&g_tmem, size, Perm_None); + } else { + rc = tmemCreateFromMemory(&g_tmem, buffer, size, Perm_None); + } + if (R_FAILED(rc)) return rc; + + char send_path[FS_MAX_PATH] = {0}; + strncpy(send_path, path, FS_MAX_PATH-1); + send_path[FS_MAX_PATH-1] = 0; + + const struct { + u8 exfat; + u64 size; + } in = { exfat, g_tmem.size }; + + rc = serviceDispatchIn(&g_amssuSrv, 2, in, + .in_num_handles = 1, + .in_handles = { g_tmem.handle }, + .buffer_attrs = { SfBufferAttr_In | SfBufferAttr_HipcPointer | SfBufferAttr_FixedSize }, + .buffers = { { send_path, FS_MAX_PATH } }, + ); + if (R_FAILED((rc))) { + tmemClose(&g_tmem); + } + + return rc; +} + +Result amssuSetupUpdateWithVariation(void *buffer, size_t size, const char *path, bool exfat, u32 variation) { + Result rc = 0; + + if (buffer == NULL) { + rc = tmemCreate(&g_tmem, size, Perm_None); + } else { + rc = tmemCreateFromMemory(&g_tmem, buffer, size, Perm_None); + } + if (R_FAILED(rc)) return rc; + + char send_path[FS_MAX_PATH] = {0}; + strncpy(send_path, path, FS_MAX_PATH-1); + send_path[FS_MAX_PATH-1] = 0; + + const struct { + u8 exfat; + u32 variation; + u64 size; + } in = { exfat, variation, g_tmem.size }; + + rc = serviceDispatchIn(&g_amssuSrv, 3, in, + .in_num_handles = 1, + .in_handles = { g_tmem.handle }, + .buffer_attrs = { SfBufferAttr_In | SfBufferAttr_HipcPointer | SfBufferAttr_FixedSize }, + .buffers = { { send_path, FS_MAX_PATH } }, + ); + if (R_FAILED((rc))) { + tmemClose(&g_tmem); + } + + return rc; +} + +Result amssuRequestPrepareUpdate(AsyncResult *a) { + memset(a, 0, sizeof(*a)); + + Handle event = INVALID_HANDLE; + Result rc = serviceDispatch(&g_amssuSrv, 4, + .out_num_objects = 1, + .out_objects = &a->s, + .out_handle_attrs = { SfOutHandleAttr_HipcCopy }, + .out_handles = &event, + ); + + if (R_SUCCEEDED(rc)) + eventLoadRemote(&a->event, event, false); + + return rc; +} + +Result amssuGetPrepareUpdateProgress(NsSystemUpdateProgress *out) { + return serviceDispatchOut(&g_amssuSrv, 5, *out); +} + +Result amssuHasPreparedUpdate(bool *out) { + u8 outval = 0; + Result rc = serviceDispatchOut(&g_amssuSrv, 6, outval); + if (R_SUCCEEDED(rc)) { + if (out) *out = outval & 1; + } + return rc; +} + +Result amssuApplyPreparedUpdate() { + return serviceDispatch(&g_amssuSrv, 7); +} \ No newline at end of file diff --git a/troposphere/daybreak/source/ams_su.h b/troposphere/daybreak/source/ams_su.h new file mode 100644 index 000000000..d38e183fe --- /dev/null +++ b/troposphere/daybreak/source/ams_su.h @@ -0,0 +1,51 @@ +/* + * Copyright (c) 2018-2020 Atmosphère-NX + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see . + */ +#pragma once +#include + +#ifdef __cplusplus +extern "C" { +#endif + +typedef struct { + u32 version; + bool exfat_supported; + u32 num_firmware_variations; + u32 firmware_variation_ids[16]; +} AmsSuUpdateInformation; + +typedef struct { + Result result; + NcmContentMetaKey invalid_key; + NcmContentId invalid_content_id; +} AmsSuUpdateValidationInfo; + +Result amssuInitialize(); +void amssuExit(); +Service *amssuGetServiceSession(void); + +Result amssuGetUpdateInformation(AmsSuUpdateInformation *out, const char *path); +Result amssuValidateUpdate(AmsSuUpdateValidationInfo *out, const char *path); +Result amssuSetupUpdate(void *buffer, size_t size, const char *path, bool exfat); +Result amssuSetupUpdateWithVariation(void *buffer, size_t size, const char *path, bool exfat, u32 variation); +Result amssuRequestPrepareUpdate(AsyncResult *a); +Result amssuGetPrepareUpdateProgress(NsSystemUpdateProgress *out); +Result amssuHasPreparedUpdate(bool *out); +Result amssuApplyPreparedUpdate(); + +#ifdef __cplusplus +} +#endif \ No newline at end of file diff --git a/troposphere/daybreak/source/assert.hpp b/troposphere/daybreak/source/assert.hpp new file mode 100644 index 000000000..1b8ed4d5f --- /dev/null +++ b/troposphere/daybreak/source/assert.hpp @@ -0,0 +1,23 @@ +/* + * Copyright (c) 2020 Adubbz + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see . + */ +#pragma once + +#include + +#define DBK_ABORT_UNLESS(expr) \ + if (!static_cast(expr)) { \ + std::abort(); \ + } diff --git a/troposphere/daybreak/source/main.cpp b/troposphere/daybreak/source/main.cpp new file mode 100644 index 000000000..ba7656873 --- /dev/null +++ b/troposphere/daybreak/source/main.cpp @@ -0,0 +1,263 @@ +/* + * Copyright (c) 2020 Adubbz + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see . + */ +#include +#include +#include +#include +#include +#include "ui.hpp" +#include "ams_su.h" + +extern "C" { + + void userAppInit(void) { + Result rc = 0; + + if (R_FAILED(rc = amssuInitialize())) { + fatalThrow(rc); + } + + if (R_FAILED(rc = romfsInit())) { + fatalThrow(rc); + } + + if (R_FAILED(rc = spsmInitialize())) { + fatalThrow(rc); + } + + if (R_FAILED(rc = plInitialize(PlServiceType_User))) { + fatalThrow(rc); + } + + if (R_FAILED(rc = hiddbgInitialize())) { + fatalThrow(rc); + } + + } + + void userAppExit(void) { + hiddbgExit(); + plExit(); + spsmExit(); + romfsExit(); + amssuExit(); + } + +} + +namespace { + + static constexpr u32 FramebufferWidth = 1280; + static constexpr u32 FramebufferHeight = 720; + +} + +class Daybreak : public CApplication { + private: + static constexpr unsigned NumFramebuffers = 2; + static constexpr unsigned StaticCmdSize = 0x1000; + + dk::UniqueDevice m_device; + dk::UniqueQueue m_queue; + dk::UniqueSwapchain m_swapchain; + + std::optional m_pool_images; + std::optional m_pool_code; + std::optional m_pool_data; + + dk::UniqueCmdBuf m_cmd_buf; + DkCmdList m_render_cmdlist; + + dk::Image m_depth_buffer; + CMemPool::Handle m_depth_buffer_mem; + dk::Image m_framebuffers[NumFramebuffers]; + CMemPool::Handle m_framebuffers_mem[NumFramebuffers]; + DkCmdList m_framebuffer_cmdlists[NumFramebuffers]; + + std::optional m_renderer; + NVGcontext *m_vg; + int m_standard_font; + public: + Daybreak() { + Result rc = 0; + + /* Create the deko3d device. */ + m_device = dk::DeviceMaker{}.create(); + + /* Create the main queue. */ + m_queue = dk::QueueMaker{m_device}.setFlags(DkQueueFlags_Graphics).create(); + + /* Create the memory pools. */ + m_pool_images.emplace(m_device, DkMemBlockFlags_GpuCached | DkMemBlockFlags_Image, 16*1024*1024); + m_pool_code.emplace(m_device, DkMemBlockFlags_CpuUncached | DkMemBlockFlags_GpuCached | DkMemBlockFlags_Code, 128*1024); + m_pool_data.emplace(m_device, DkMemBlockFlags_CpuUncached | DkMemBlockFlags_GpuCached, 1*1024*1024); + + /* Create the static command buffer and feed it freshly allocated memory. */ + m_cmd_buf = dk::CmdBufMaker{m_device}.create(); + CMemPool::Handle cmdmem = m_pool_data->allocate(StaticCmdSize); + m_cmd_buf.addMemory(cmdmem.getMemBlock(), cmdmem.getOffset(), cmdmem.getSize()); + + /* Create the framebuffer resources. */ + this->CreateFramebufferResources(); + + m_renderer.emplace(FramebufferWidth, FramebufferHeight, m_device, m_queue, *m_pool_images, *m_pool_code, *m_pool_data); + m_vg = nvgCreateDk(&*m_renderer, NVG_ANTIALIAS | NVG_STENCIL_STROKES); + + + PlFontData font; + if (R_FAILED(rc = plGetSharedFontByType(&font, PlSharedFontType_Standard))) { + fatalThrow(rc); + } + + m_standard_font = nvgCreateFontMem(m_vg, "switch-standard", static_cast(font.address), font.size, 0); + } + + ~Daybreak() { + /* Destroy the framebuffer resources. This should be done first. */ + this->DestroyFramebufferResources(); + + /* Cleanup vg. */ + nvgDeleteDk(m_vg); + + /* Destroy the renderer. */ + m_renderer.reset(); + } + private: + void CreateFramebufferResources() { + /* Create layout for the depth buffer. */ + dk::ImageLayout layout_depth_buffer; + dk::ImageLayoutMaker{m_device} + .setFlags(DkImageFlags_UsageRender | DkImageFlags_HwCompression) + .setFormat(DkImageFormat_S8) + .setDimensions(FramebufferWidth, FramebufferHeight) + .initialize(layout_depth_buffer); + + /* Create the depth buffer. */ + m_depth_buffer_mem = m_pool_images->allocate(layout_depth_buffer.getSize(), layout_depth_buffer.getAlignment()); + m_depth_buffer.initialize(layout_depth_buffer, m_depth_buffer_mem.getMemBlock(), m_depth_buffer_mem.getOffset()); + + /* Create layout for the framebuffers. */ + dk::ImageLayout layout_framebuffer; + dk::ImageLayoutMaker{m_device} + .setFlags(DkImageFlags_UsageRender | DkImageFlags_UsagePresent | DkImageFlags_HwCompression) + .setFormat(DkImageFormat_RGBA8_Unorm) + .setDimensions(FramebufferWidth, FramebufferHeight) + .initialize(layout_framebuffer); + + /* Create the framebuffers. */ + std::array fb_array; + const u64 fb_size = layout_framebuffer.getSize(); + const u32 fb_align = layout_framebuffer.getAlignment(); + + for (unsigned int i = 0; i < NumFramebuffers; i++) { + /* Allocate a framebuffer. */ + m_framebuffers_mem[i] = m_pool_images->allocate(fb_size, fb_align); + m_framebuffers[i].initialize(layout_framebuffer, m_framebuffers_mem[i].getMemBlock(), m_framebuffers_mem[i].getOffset()); + + /* Generate a command list that binds it. */ + dk::ImageView color_target{ m_framebuffers[i] }, depth_target{ m_depth_buffer }; + m_cmd_buf.bindRenderTargets(&color_target, &depth_target); + m_framebuffer_cmdlists[i] = m_cmd_buf.finishList(); + + /* Fill in the array for use later by the swapchain creation code. */ + fb_array[i] = &m_framebuffers[i]; + } + + /* Create the swapchain using the framebuffers. */ + m_swapchain = dk::SwapchainMaker{m_device, nwindowGetDefault(), fb_array}.create(); + + /* Generate the main rendering cmdlist. */ + this->RecordStaticCommands(); + } + + void DestroyFramebufferResources() { + /* Return early if we have nothing to destroy. */ + if (!m_swapchain) return; + + /* Make sure the queue is idle before destroying anything. */ + m_queue.waitIdle(); + + /* Clear the static cmdbuf, destroying the static cmdlists in the process. */ + m_cmd_buf.clear(); + + /* Destroy the swapchain. */ + m_swapchain.destroy(); + + /* Destroy the framebuffers. */ + for (unsigned int i = 0; i < NumFramebuffers; i ++) { + m_framebuffers_mem[i].destroy(); + } + + /* Destroy the depth buffer. */ + m_depth_buffer_mem.destroy(); + } + + void RecordStaticCommands() { + /* Initialize state structs with deko3d defaults. */ + dk::RasterizerState rasterizer_state; + dk::ColorState color_state; + dk::ColorWriteState color_write_state; + + /* Configure the viewport and scissor. */ + m_cmd_buf.setViewports(0, { { 0.0f, 0.0f, FramebufferWidth, FramebufferHeight, 0.0f, 1.0f } }); + m_cmd_buf.setScissors(0, { { 0, 0, FramebufferWidth, FramebufferHeight } }); + + /* Clear the color and depth buffers. */ + m_cmd_buf.clearColor(0, DkColorMask_RGBA, 0.f, 0.f, 0.f, 1.0f); + m_cmd_buf.clearDepthStencil(true, 1.0f, 0xFF, 0); + + /* Bind required state. */ + m_cmd_buf.bindRasterizerState(rasterizer_state); + m_cmd_buf.bindColorState(color_state); + m_cmd_buf.bindColorWriteState(color_write_state); + + m_render_cmdlist = m_cmd_buf.finishList(); + } + + void Render(u64 ns) { + /* Acquire a framebuffer from the swapchain (and wait for it to be available). */ + int slot = m_queue.acquireImage(m_swapchain); + + /* Run the command list that attaches said framebuffer to the queue. */ + m_queue.submitCommands(m_framebuffer_cmdlists[slot]); + + /* Run the main rendering command list. */ + m_queue.submitCommands(m_render_cmdlist); + + nvgBeginFrame(m_vg, FramebufferWidth, FramebufferHeight, 1.0f); + dbk::RenderMenu(m_vg, ns); + nvgEndFrame(m_vg); + + /* Now that we are done rendering, present it to the screen. */ + m_queue.presentImage(m_swapchain, slot); + } + + public: + bool onFrame(u64 ns) override { + dbk::UpdateMenu(ns); + this->Render(ns); + return !dbk::IsExitRequested(); + } +}; + +int main(int argc, char **argv) { + /* Initialize the menu. */ + dbk::InitializeMenu(FramebufferWidth, FramebufferHeight); + + Daybreak daybreak; + daybreak.run(); + return 0; +} diff --git a/troposphere/daybreak/source/service_guard.h b/troposphere/daybreak/source/service_guard.h new file mode 100644 index 000000000..5fbc5fca9 --- /dev/null +++ b/troposphere/daybreak/source/service_guard.h @@ -0,0 +1,56 @@ +#pragma once +#include +#include +#include +#include +#include + +typedef struct ServiceGuard { + Mutex mutex; + u32 refCount; +} ServiceGuard; + +NX_INLINE bool serviceGuardBeginInit(ServiceGuard* g) +{ + mutexLock(&g->mutex); + return (g->refCount++) == 0; +} + +NX_INLINE Result serviceGuardEndInit(ServiceGuard* g, Result rc, void (*cleanupFunc)(void)) +{ + if (R_FAILED(rc)) { + cleanupFunc(); + --g->refCount; + } + mutexUnlock(&g->mutex); + return rc; +} + +NX_INLINE void serviceGuardExit(ServiceGuard* g, void (*cleanupFunc)(void)) +{ + mutexLock(&g->mutex); + if (g->refCount && (--g->refCount) == 0) + cleanupFunc(); + mutexUnlock(&g->mutex); +} + +#define NX_GENERATE_SERVICE_GUARD_PARAMS(name, _paramdecl, _parampass) \ +\ +static ServiceGuard g_##name##Guard; \ +NX_INLINE Result _##name##Initialize _paramdecl; \ +static void _##name##Cleanup(void); \ +\ +Result name##Initialize _paramdecl \ +{ \ + Result rc = 0; \ + if (serviceGuardBeginInit(&g_##name##Guard)) \ + rc = _##name##Initialize _parampass; \ + return serviceGuardEndInit(&g_##name##Guard, rc, _##name##Cleanup); \ +} \ +\ +void name##Exit(void) \ +{ \ + serviceGuardExit(&g_##name##Guard, _##name##Cleanup); \ +} + +#define NX_GENERATE_SERVICE_GUARD(name) NX_GENERATE_SERVICE_GUARD_PARAMS(name, (void), ()) \ No newline at end of file diff --git a/troposphere/daybreak/source/ui.cpp b/troposphere/daybreak/source/ui.cpp new file mode 100644 index 000000000..b47437740 --- /dev/null +++ b/troposphere/daybreak/source/ui.cpp @@ -0,0 +1,969 @@ +/* + * Copyright (c) 2020 Adubbz + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see . + */ +#include +#include +#include +#include +#include "ui.hpp" +#include "ui_util.hpp" +#include "assert.hpp" + +namespace dbk { + + namespace { + + u32 g_screen_width; + u32 g_screen_height; + + std::shared_ptr g_current_menu; + bool g_initialized = false; + bool g_exit_requested = false; + + u32 g_prev_touch_count = -1; + touchPosition g_start_touch_position; + bool g_started_touching = false; + bool g_tapping = false; + bool g_touches_moving = false; + bool g_finished_touching = false; + + /* Update install state. */ + char g_update_path[FS_MAX_PATH]; + bool g_use_exfat = false; + + constexpr u32 MaxTapMovement = 20; + + void UpdateInput() { + /* Update the previous touch count. */ + g_prev_touch_count = hidTouchCount(); + + /* Scan for input and update touch state. */ + hidScanInput(); + const u32 touch_count = hidTouchCount(); + + if (g_prev_touch_count == 0 && touch_count > 0) { + hidTouchRead(&g_start_touch_position, 0); + g_started_touching = true; + g_tapping = true; + } else { + g_started_touching = false; + } + + if (g_prev_touch_count > 0 && touch_count == 0) { + g_finished_touching = true; + g_tapping = false; + } else { + g_finished_touching = false; + } + + /* Check if currently moving. */ + if (g_prev_touch_count > 0 && touch_count > 0) { + touchPosition current_touch_position; + hidTouchRead(¤t_touch_position, 0); + + if ((abs(current_touch_position.px - g_start_touch_position.px) > MaxTapMovement || abs(current_touch_position.py - g_start_touch_position.py) > MaxTapMovement)) { + g_touches_moving = true; + g_tapping = false; + } else { + g_touches_moving = false; + } + } else { + g_touches_moving = false; + } + } + + void ChangeMenu(std::shared_ptr menu) { + g_current_menu = menu; + } + + void ReturnToPreviousMenu() { + /* Go to the previous menu if there is one. */ + if (g_current_menu->GetPrevMenu() != nullptr) { + g_current_menu = g_current_menu->GetPrevMenu(); + } + } + + Result IsPathBottomLevel(const char *path, bool *out) { + Result rc = 0; + FsFileSystem *fs; + char translated_path[FS_MAX_PATH] = {}; + DBK_ABORT_UNLESS(fsdevTranslatePath(path, &fs, translated_path) != -1); + + FsDir dir; + if (R_FAILED(rc = fsFsOpenDirectory(fs, translated_path, FsDirOpenMode_ReadDirs, &dir))) { + return rc; + } + + s64 entry_count; + if (R_FAILED(rc = fsDirGetEntryCount(&dir, &entry_count))) { + return rc; + } + + *out = entry_count == 0; + fsDirClose(&dir); + return rc; + } + + } + + void Menu::AddButton(u32 id, const char *text, float x, float y, float w, float h) { + DBK_ABORT_UNLESS(id < MaxButtons); + Button button = { + .id = id, + .selected = false, + .enabled = true, + .x = x, + .y = y, + .w = w, + .h = h, + }; + + strncpy(button.text, text, sizeof(button.text)-1); + m_buttons[id] = button; + } + + void Menu::SetButtonSelected(u32 id, bool selected) { + DBK_ABORT_UNLESS(id < MaxButtons); + auto &button = m_buttons[id]; + + if (button) { + button->selected = selected; + } + } + + void Menu::DeselectAllButtons() { + for (auto &button : m_buttons) { + /* Ensure button is present. */ + if (!button) { + continue; + } + button->selected = false; + } + } + + void Menu::SetButtonEnabled(u32 id, bool enabled) { + DBK_ABORT_UNLESS(id < MaxButtons); + auto &button = m_buttons[id]; + button->enabled = enabled; + } + + Button *Menu::GetButton(u32 id) { + DBK_ABORT_UNLESS(id < MaxButtons); + return !m_buttons[id] ? nullptr : &(*m_buttons[id]); + } + + Button *Menu::GetSelectedButton() { + for (auto &button : m_buttons) { + if (button && button->enabled && button->selected) { + return &(*button); + } + } + + return nullptr; + } + + Button *Menu::GetClosestButtonToSelection(Direction direction) { + const Button *selected_button = this->GetSelectedButton(); + + if (selected_button == nullptr || direction == Direction::Invalid) { + return nullptr; + } + + Button *closest_button = nullptr; + float closest_distance = 0.0f; + + for (auto &button : m_buttons) { + /* Skip absent button. */ + if (!button || !button->enabled) { + continue; + } + + /* Skip buttons that are in the wrong direction. */ + if ((direction == Direction::Down && button->y <= selected_button->y) || + (direction == Direction::Up && button->y >= selected_button->y) || + (direction == Direction::Right && button->x <= selected_button->x) || + (direction == Direction::Left && button->x >= selected_button->x)) { + continue; + } + + const float x_dist = button->x - selected_button->x; + const float y_dist = button->y - selected_button->y; + const float sq_dist = x_dist * x_dist + y_dist * y_dist; + + /* If we don't already have a closest button, set it. */ + if (closest_button == nullptr) { + closest_button = &(*button); + closest_distance = sq_dist; + continue; + } + + /* Update the closest button if this one is closer. */ + if (sq_dist < closest_distance) { + closest_button = &(*button); + closest_distance = sq_dist; + } + } + + return closest_button; + } + + Button *Menu::GetTouchedButton() { + touchPosition touch; + const u32 touch_count = hidTouchCount(); + + for (u32 i = 0; i < touch_count && g_started_touching; i++) { + hidTouchRead(&touch, i); + + for (auto &button : m_buttons) { + if (button && button->enabled && button->IsPositionInBounds(touch.px, touch.py)) { + return &(*button); + } + } + } + + return nullptr; + } + + Button *Menu::GetActivatedButton() { + Button *selected_button = this->GetSelectedButton(); + + if (selected_button == nullptr) { + return nullptr; + } + + const u64 k_down = hidKeysDown(CONTROLLER_P1_AUTO); + + if (k_down & KEY_A || this->GetTouchedButton() == selected_button) { + return selected_button; + } + + return nullptr; + } + + void Menu::UpdateButtons() { + const u64 k_down = hidKeysDown(CONTROLLER_P1_AUTO); + Direction direction = Direction::Invalid; + + if (k_down & KEY_DOWN) { + direction = Direction::Down; + } else if (k_down & KEY_UP) { + direction = Direction::Up; + } else if (k_down & KEY_LEFT) { + direction = Direction::Left; + } else if (k_down & KEY_RIGHT) { + direction = Direction::Right; + } + + /* Select the closest button. */ + if (const Button *closest_button = this->GetClosestButtonToSelection(direction); closest_button != nullptr) { + this->DeselectAllButtons(); + this->SetButtonSelected(closest_button->id, true); + } + + /* Select the touched button. */ + if (const Button *touched_button = this->GetTouchedButton(); touched_button != nullptr) { + this->DeselectAllButtons(); + this->SetButtonSelected(touched_button->id, true); + } + } + + void Menu::DrawButtons(NVGcontext *vg, u64 ns) { + for (auto &button : m_buttons) { + /* Ensure button is present. */ + if (!button) { + continue; + } + + /* Set the button style. */ + auto style = ButtonStyle::StandardDisabled; + if (button->enabled) { + style = button->selected ? ButtonStyle::StandardSelected : ButtonStyle::Standard; + } + + DrawButton(vg, button->text, button->x, button->y, button->w, button->h, style, ns); + } + } + + void Menu::LogText(const char *format, ...) { + /* Create a temporary string. */ + char tmp[0x100]; + va_list args; + va_start(args, format); + vsnprintf(tmp, sizeof(tmp)-1, format, args); + va_end(args); + + /* Append the text to the log buffer. */ + strncat(m_log_buffer, tmp, sizeof(m_log_buffer)-1); + } + + std::shared_ptr Menu::GetPrevMenu() { + return m_prev_menu; + } + + MainMenu::MainMenu() : Menu(nullptr) { + const float x = g_screen_width / 2.0f - WindowWidth / 2.0f; + const float y = g_screen_height / 2.0f - WindowHeight / 2.0f; + + this->AddButton(InstallButtonId, "Install", x + ButtonHorizontalPadding, y + TitleGap, WindowWidth - ButtonHorizontalPadding * 2, ButtonHeight); + this->AddButton(ExitButtonId, "Exit", x + ButtonHorizontalPadding, y + TitleGap + ButtonHeight + ButtonVerticalGap, WindowWidth - ButtonHorizontalPadding * 2, ButtonHeight); + this->SetButtonSelected(InstallButtonId, true); + } + + void MainMenu::Update(u64 ns) { + u64 k_down = hidKeysDown(CONTROLLER_P1_AUTO); + + if (k_down & KEY_B) { + g_exit_requested = true; + } + + /* Take action if a button has been activated. */ + if (const Button *activated_button = this->GetActivatedButton(); activated_button != nullptr) { + switch (activated_button->id) { + case InstallButtonId: + ChangeMenu(std::make_shared(g_current_menu, "/")); + break; + case ExitButtonId: + g_exit_requested = true; + break; + } + } + + this->UpdateButtons(); + + /* Fallback on selecting the install button. */ + if (const Button *selected_button = this->GetSelectedButton(); k_down && selected_button == nullptr) { + this->SetButtonSelected(InstallButtonId, true); + } + } + + void MainMenu::Draw(NVGcontext *vg, u64 ns) { + DrawWindow(vg, "Daybreak", g_screen_width / 2.0f - WindowWidth / 2.0f, g_screen_height / 2.0f - WindowHeight / 2.0f, WindowWidth, WindowHeight); + this->DrawButtons(vg, ns); + } + + FileMenu::FileMenu(std::shared_ptr prev_menu, const char *root) : Menu(prev_menu), m_current_index(0), m_scroll_offset(0), m_touch_start_scroll_offset(0), m_touch_finalize_selection(false) { + Result rc = 0; + + strncpy(m_root, root, sizeof(m_root)-1); + + if (R_FAILED(rc = this->PopulateFileEntries())) { + fatalThrow(rc); + } + } + + Result FileMenu::PopulateFileEntries() { + /* Open the directory. */ + DIR *dir = opendir(m_root); + if (dir == nullptr) { + return fsdevGetLastResult(); + } + + /* Add file entries to the list. */ + struct dirent *ent; + while ((ent = readdir(dir)) != nullptr) { + if (ent->d_type == DT_DIR) { + FileEntry file_entry = {}; + strncpy(file_entry.name, ent->d_name, sizeof(file_entry.name)); + m_file_entries.push_back(file_entry); + } + } + + /* Close the directory. */ + closedir(dir); + return 0; + } + + bool FileMenu::IsSelectionVisible() { + const float visible_start = m_scroll_offset; + const float visible_end = visible_start + FileListHeight; + const float entry_start = static_cast(m_current_index) * (FileRowHeight + FileRowGap); + const float entry_end = entry_start + (FileRowHeight + FileRowGap); + return entry_start >= visible_start && entry_end <= visible_end; + } + + void FileMenu::ScrollToSelection() { + const float visible_start = m_scroll_offset; + const float visible_end = visible_start + FileListHeight; + const float entry_start = static_cast(m_current_index) * (FileRowHeight + FileRowGap); + const float entry_end = entry_start + (FileRowHeight + FileRowGap); + + if (entry_end > visible_end) { + m_scroll_offset += entry_end - visible_end; + } else if (entry_end < visible_end) { + m_scroll_offset = entry_start; + } + } + + bool FileMenu::IsEntryTouched(u32 i) { + const float x = g_screen_width / 2.0f - WindowWidth / 2.0f; + const float y = g_screen_height / 2.0f - WindowHeight / 2.0f; + + touchPosition current_pos; + hidTouchRead(¤t_pos, 0); + + /* Check if the tap is within the x bounds. */ + if (current_pos.px >= x + TextBackgroundOffset + FileRowHorizontalInset && current_pos.px <= WindowWidth - (TextBackgroundOffset + FileRowHorizontalInset) * 2.0f) { + const float y_min = y + TitleGap + FileRowGap + i * (FileRowHeight + FileRowGap) - m_scroll_offset; + const float y_max = y_min + FileRowHeight; + + /* Check if the tap is within the y bounds. */ + if (current_pos.py >= y_min && current_pos.py <= y_max) { + return true; + } + } + + return false; + } + + void FileMenu::UpdateTouches() { + /* Setup values on initial touch. */ + if (g_started_touching) { + m_touch_start_scroll_offset = m_scroll_offset; + + /* We may potentially finalize the selection later if we start off touching it. */ + if (this->IsEntryTouched(m_current_index)) { + m_touch_finalize_selection = true; + } + } + + /* Scroll based on touch movement. */ + if (g_touches_moving) { + touchPosition current_pos; + hidTouchRead(¤t_pos, 0); + + const int dist_y = current_pos.py - g_start_touch_position.py; + float new_scroll_offset = m_touch_start_scroll_offset - static_cast(dist_y); + float max_scroll = (FileRowHeight + FileRowGap) * static_cast(m_file_entries.size()) - FileListHeight; + + /* Don't allow scrolling if there is not enough elements. */ + if (max_scroll < 0.0f) { + max_scroll = 0.0f; + } + + /* Don't allow scrolling before the first element. */ + if (new_scroll_offset < 0.0f) { + new_scroll_offset = 0.0f; + } + + /* Don't allow scrolling past the last element. */ + if (new_scroll_offset > max_scroll) { + new_scroll_offset = max_scroll; + } + + m_scroll_offset = new_scroll_offset; + } + + /* Select any tapped entries. */ + if (g_tapping) { + for (u32 i = 0; i < m_file_entries.size(); i++) { + if (this->IsEntryTouched(i)) { + /* The current index is checked later. */ + if (i == m_current_index) { + continue; + } + + m_current_index = i; + + /* Don't finalize selection if we touch something else. */ + m_touch_finalize_selection = false; + break; + } + } + } + + /* Don't finalize selection if we aren't finished and we've either stopped tapping or are no longer touching the selection. */ + if (!g_finished_touching && (!g_tapping || !this->IsEntryTouched(m_current_index))) { + m_touch_finalize_selection = false; + } + + /* Finalize selection if the currently selected entry is touched for the second time. */ + if (g_finished_touching && m_touch_finalize_selection) { + this->FinalizeSelection(); + m_touch_finalize_selection = false; + } + } + + void FileMenu::FinalizeSelection() { + DBK_ABORT_UNLESS(m_current_index < m_file_entries.size()); + FileEntry &entry = m_file_entries[m_current_index]; + + /* Determine the selected path. */ + char current_path[FS_MAX_PATH] = {}; + snprintf(current_path, sizeof(current_path)-1, "%s%s", m_root, entry.name); + + /* Determine if the chosen path is the bottom level. */ + Result rc = 0; + bool bottom_level; + if (R_FAILED(rc = IsPathBottomLevel(current_path, &bottom_level))) { + fatalThrow(rc); + } + + /* Show exfat settings or the next file menu. */ + if (bottom_level) { + /* Set the update path. */ + snprintf(g_update_path, sizeof(g_update_path)-1, "%s", current_path); + + /* Change the menu. */ + ChangeMenu(std::make_shared(g_current_menu)); + } else { + ChangeMenu(std::make_shared(g_current_menu, current_path)); + } + } + + void FileMenu::Update(u64 ns) { + u64 k_down = hidKeysDown(CONTROLLER_P1_AUTO); + + /* Go back if B is pressed. */ + if (k_down & KEY_B) { + ReturnToPreviousMenu(); + return; + } + + /* Finalize selection on pressing A. */ + if (k_down & KEY_A) { + this->FinalizeSelection(); + } + + /* Update touch input. */ + this->UpdateTouches(); + + const u32 prev_index = m_current_index; + + if (k_down & KEY_DOWN) { + /* Scroll down. */ + if (m_current_index >= (m_file_entries.size() - 1)) { + m_current_index = 0; + } else { + m_current_index++; + } + } else if (k_down & KEY_UP) { + /* Scroll up. */ + if (m_current_index == 0) { + m_current_index = m_file_entries.size() - 1; + } else { + m_current_index--; + } + } + + /* Scroll to the selection if it isn't visible. */ + if (prev_index != m_current_index && !this->IsSelectionVisible()) { + this->ScrollToSelection(); + } + } + + void FileMenu::Draw(NVGcontext *vg, u64 ns) { + const float x = g_screen_width / 2.0f - WindowWidth / 2.0f; + const float y = g_screen_height / 2.0f - WindowHeight / 2.0f; + + DrawWindow(vg, "Select an update directory", x, y, WindowWidth, WindowHeight); + DrawTextBackground(vg, x + TextBackgroundOffset, y + TitleGap, WindowWidth - TextBackgroundOffset * 2.0f, (FileRowHeight + FileRowGap) * MaxFileRows + FileRowGap); + + nvgSave(vg); + nvgScissor(vg, x + TextBackgroundOffset, y + TitleGap, WindowWidth - TextBackgroundOffset * 2.0f, (FileRowHeight + FileRowGap) * MaxFileRows + FileRowGap); + + for (u32 i = 0; i < m_file_entries.size(); i++) { + FileEntry &entry = m_file_entries[i]; + auto style = ButtonStyle::FileSelect; + + if (i == m_current_index) { + style = ButtonStyle::FileSelectSelected; + } + + DrawButton(vg, entry.name, x + TextBackgroundOffset + FileRowHorizontalInset, y + TitleGap + FileRowGap + i * (FileRowHeight + FileRowGap) - m_scroll_offset, WindowWidth - (TextBackgroundOffset + FileRowHorizontalInset) * 2.0f, FileRowHeight, style, ns); + } + + nvgRestore(vg); + } + + ValidateUpdateMenu::ValidateUpdateMenu(std::shared_ptr prev_menu) : Menu(prev_menu), m_has_drawn(false), m_has_info(false), m_has_validated(false) { + const float x = g_screen_width / 2.0f - WindowWidth / 2.0f; + const float y = g_screen_height / 2.0f - WindowHeight / 2.0f; + + /* Add buttons. */ + this->AddButton(BackButtonId, "Back", x + HorizontalGap, y + WindowHeight - BottomGap - ButtonHeight, ButtonWidth, ButtonHeight); + this->AddButton(ContinueButtonId, "Continue", x + HorizontalGap + ButtonWidth + ButtonHorizontalGap, y + WindowHeight - BottomGap - ButtonHeight, ButtonWidth, ButtonHeight); + this->SetButtonEnabled(BackButtonId, false); + this->SetButtonEnabled(ContinueButtonId, false); + + /* Obtain update information. */ + if (R_FAILED(this->GetUpdateInformation())) { + this->SetButtonEnabled(BackButtonId, true); + this->SetButtonSelected(BackButtonId, true); + } else { + /* Log this early so it is printed out before validation causes stalling. */ + this->LogText("Validating update, this may take a moment...\n"); + } + } + + Result ValidateUpdateMenu::GetUpdateInformation() { + Result rc = 0; + this->LogText("Directory %s\n", g_update_path); + + /* Attempt to get the update information. */ + if (R_FAILED(rc = amssuGetUpdateInformation(&m_update_info, g_update_path))) { + if (rc == 0x1a405) { + this->LogText("No update found in folder.\nEnsure your ncas are named correctly!\nResult: 0x%08x\n", rc); + } else { + this->LogText("Failed to get update information.\nResult: 0x%08x\n", rc); + } + return rc; + } + + /* Print update information. */ + this->LogText("- Version: %d.%d.%d\n", (m_update_info.version >> 26) & 0x1f, (m_update_info.version >> 20) & 0x1f, (m_update_info.version >> 16) & 0xf); + if (m_update_info.exfat_supported) { + this->LogText("- exFAT: Supported\n"); + } else { + this->LogText("- exFAT: Unsupported\n"); + } + this->LogText("- Firmware variations: %d\n", m_update_info.num_firmware_variations); + + /* Mark as having obtained update info. */ + m_has_info = true; + return rc; + } + + void ValidateUpdateMenu::ValidateUpdate() { + Result rc = 0; + + /* Validate the update. */ + if (R_FAILED(rc = amssuValidateUpdate(&m_validation_info, g_update_path))) { + this->LogText("Failed to validate update.\nResult: 0x%08x\n", rc); + return; + } + + /* Check the result. */ + if (R_SUCCEEDED(m_validation_info.result)) { + this->LogText("Update is valid!\n"); + + /* Enable the back and continue buttons and select the continue button. */ + this->SetButtonEnabled(BackButtonId, true); + this->SetButtonEnabled(ContinueButtonId, true); + this->SetButtonSelected(ContinueButtonId, true); + } else { + /* Log the missing content info. */ + const u32 version = m_validation_info.invalid_key.version; + this->LogText("Validation failed with result: 0x%08x\n", m_validation_info.result); + this->LogText("Missing content:\n- Program id: %016lx\n- Version: %d.%d.%d\n", m_validation_info.invalid_key.id, (version >> 26) & 0x1f, (version >> 20) & 0x1f, (version >> 16) & 0xf); + + /* Log the missing content id. */ + this->LogText("- Content id: "); + for (size_t i = 0; i < sizeof(NcmContentId); i++) { + this->LogText("%02x", m_validation_info.invalid_content_id.c[i]); + } + this->LogText("\n"); + + /* Enable the back button and select it. */ + this->SetButtonEnabled(BackButtonId, true); + this->SetButtonSelected(BackButtonId, true); + } + + /* Mark validation as being complete. */ + m_has_validated = true; + } + + void ValidateUpdateMenu::Update(u64 ns) { + /* Perform validation if it hasn't been done already. */ + if (m_has_info && m_has_drawn && !m_has_validated) { + this->ValidateUpdate(); + } + + u64 k_down = hidKeysDown(CONTROLLER_P1_AUTO); + + /* Go back if B is pressed. */ + if (k_down & KEY_B) { + ReturnToPreviousMenu(); + return; + } + + /* Take action if a button has been activated. */ + if (const Button *activated_button = this->GetActivatedButton(); activated_button != nullptr) { + switch (activated_button->id) { + case BackButtonId: + ReturnToPreviousMenu(); + return; + case ContinueButtonId: + /* Don't continue if validation hasn't been done or has failed. */ + if (!m_has_validated || R_FAILED(m_validation_info.result)) { + break; + } + + if (m_update_info.exfat_supported) { + ChangeMenu(std::make_shared(g_current_menu)); + } else { + g_use_exfat = false; + ChangeMenu(std::make_shared(g_current_menu)); + } + + return; + } + } + + this->UpdateButtons(); + } + + void ValidateUpdateMenu::Draw(NVGcontext *vg, u64 ns) { + const float x = g_screen_width / 2.0f - WindowWidth / 2.0f; + const float y = g_screen_height / 2.0f - WindowHeight / 2.0f; + + DrawWindow(vg, "Update information", x, y, WindowWidth, WindowHeight); + DrawTextBackground(vg, x + HorizontalGap, y + TitleGap, WindowWidth - HorizontalGap * 2.0f, TextAreaHeight); + DrawTextBlock(vg, m_log_buffer, x + HorizontalGap + TextHorizontalInset, y + TitleGap + TextVerticalInset, WindowWidth - (HorizontalGap + TextHorizontalInset) * 2.0f, TextAreaHeight - TextVerticalInset * 2.0f); + + this->DrawButtons(vg, ns); + m_has_drawn = true; + } + + ChooseExfatMenu::ChooseExfatMenu(std::shared_ptr prev_menu) : Menu(prev_menu) { + const float x = g_screen_width / 2.0f - WindowWidth / 2.0f; + const float y = g_screen_height / 2.0f - WindowHeight / 2.0f; + + this->AddButton(Fat32ButtonId, "FAT32", x + ButtonHorizontalInset, y + TitleGap, ButtonWidth, ButtonHeight); + this->AddButton(ExFatButtonId, "exFAT", x + ButtonHorizontalInset + ButtonWidth + ButtonHorizontalGap, y + TitleGap, ButtonWidth, ButtonHeight); + this->SetButtonSelected(ExFatButtonId, true); + } + + void ChooseExfatMenu::Update(u64 ns) { + u64 k_down = hidKeysDown(CONTROLLER_P1_AUTO); + + /* Go back if B is pressed. */ + if (k_down & KEY_B) { + ReturnToPreviousMenu(); + return; + } + + /* Take action if a button has been activated. */ + if (const Button *activated_button = this->GetActivatedButton(); activated_button != nullptr) { + switch (activated_button->id) { + case Fat32ButtonId: + g_use_exfat = false; + break; + case ExFatButtonId: + g_use_exfat = true; + break; + } + + ChangeMenu(std::make_shared(g_current_menu)); + } + + this->UpdateButtons(); + + /* Fallback on selecting the exfat button. */ + if (const Button *selected_button = this->GetSelectedButton(); k_down && selected_button == nullptr) { + this->SetButtonSelected(ExFatButtonId, true); + } + } + + void ChooseExfatMenu::Draw(NVGcontext *vg, u64 ns) { + const float x = g_screen_width / 2.0f - WindowWidth / 2.0f; + const float y = g_screen_height / 2.0f - WindowHeight / 2.0f; + + DrawWindow(vg, "Select driver variant", x, y, WindowWidth, WindowHeight); + this->DrawButtons(vg, ns); + } + + InstallUpdateMenu::InstallUpdateMenu(std::shared_ptr prev_menu) : Menu(prev_menu), m_install_state(InstallState::NeedsDraw), m_progress_percent(0.0f) { + const float x = g_screen_width / 2.0f - WindowWidth / 2.0f; + const float y = g_screen_height / 2.0f - WindowHeight / 2.0f; + + /* Add buttons. */ + this->AddButton(ShutdownButtonId, "Shutdown", x + HorizontalGap, y + WindowHeight - BottomGap - ButtonHeight, ButtonWidth, ButtonHeight); + this->AddButton(RebootButtonId, "Reboot", x + HorizontalGap + ButtonWidth + ButtonHorizontalGap, y + WindowHeight - BottomGap - ButtonHeight, ButtonWidth, ButtonHeight); + this->SetButtonEnabled(ShutdownButtonId, false); + this->SetButtonEnabled(RebootButtonId, false); + + /* Prevent the home button from being pressed during installation. */ + hiddbgDeactivateHomeButton(); + } + + void InstallUpdateMenu::MarkForReboot() { + this->SetButtonEnabled(ShutdownButtonId, true); + this->SetButtonEnabled(RebootButtonId, true); + this->SetButtonSelected(RebootButtonId, true); + m_install_state = InstallState::AwaitingReboot; + } + + Result InstallUpdateMenu::TransitionUpdateState() { + Result rc = 0; + if (m_install_state == InstallState::NeedsSetup) { + /* Setup the update. */ + if (R_FAILED(rc = amssuSetupUpdate(nullptr, UpdateTaskBufferSize, g_update_path, g_use_exfat))) { + this->LogText("Failed to setup update.\nResult: 0x%08x\n", rc); + this->MarkForReboot(); + return rc; + } + + /* Log setup completion. */ + this->LogText("Update setup complete.\n"); + m_install_state = InstallState::NeedsPrepare; + } else if (m_install_state == InstallState::NeedsPrepare) { + /* Request update preparation. */ + if (R_FAILED(rc = amssuRequestPrepareUpdate(&m_prepare_result))) { + this->LogText("Failed to request update preparation.\nResult: 0x%08x\n", rc); + this->MarkForReboot(); + return rc; + } + + /* Log awaiting prepare. */ + this->LogText("Preparing update...\n"); + m_install_state = InstallState::AwaitingPrepare; + } else if (m_install_state == InstallState::AwaitingPrepare) { + /* Check if preparation has a result. */ + if (R_FAILED(rc = asyncResultWait(&m_prepare_result, 0)) && rc != 0xea01) { + this->LogText("Failed to check update preparation result.\nResult: 0x%08x\n", rc); + this->MarkForReboot(); + return rc; + } else if (R_SUCCEEDED(rc)) { + if (R_FAILED(rc = asyncResultGet(&m_prepare_result))) { + this->LogText("Failed to prepare update.\nResult: 0x%08x\n", rc); + this->MarkForReboot(); + return rc; + } + } + + /* Check if the update has been prepared. */ + bool prepared; + if (R_FAILED(rc = amssuHasPreparedUpdate(&prepared))) { + this->LogText("Failed to check if update has been prepared.\nResult: 0x%08x\n", rc); + this->MarkForReboot(); + return rc; + } + + /* Mark for application if preparation complete. */ + if (prepared) { + this->LogText("Update preparation complete.\nApplying update...\n"); + m_install_state = InstallState::NeedsApply; + return rc; + } + + /* Check update progress. */ + NsSystemUpdateProgress update_progress = {}; + if (R_FAILED(rc = amssuGetPrepareUpdateProgress(&update_progress))) { + this->LogText("Failed to check update progress.\nResult: 0x%08x\n", rc); + this->MarkForReboot(); + return rc; + } + + /* Update progress percent. */ + if (update_progress.total_size > 0.0f) { + m_progress_percent = static_cast(update_progress.current_size) / static_cast(update_progress.total_size); + } else { + m_progress_percent = 0.0f; + } + } else if (m_install_state == InstallState::NeedsApply) { + /* Apply the prepared update. */ + if (R_FAILED(rc = amssuApplyPreparedUpdate())) { + this->LogText("Failed to apply update.\nResult: 0x%08x\n", rc); + } + + /* Log success. */ + this->LogText("Update applied successfully.\n"); + this->MarkForReboot(); + return rc; + } + + return rc; + } + + void InstallUpdateMenu::Update(u64 ns) { + /* Transition to the next update state. */ + if (m_install_state != InstallState::NeedsDraw && m_install_state != InstallState::AwaitingReboot) { + this->TransitionUpdateState(); + } + + /* Take action if a button has been activated. */ + if (const Button *activated_button = this->GetActivatedButton(); activated_button != nullptr) { + switch (activated_button->id) { + case ShutdownButtonId: + if (R_FAILED(appletRequestToShutdown())) { + spsmShutdown(false); + } + break; + case RebootButtonId: + if (R_FAILED(appletRequestToReboot())) { + spsmShutdown(true); + } + break; + } + } + + this->UpdateButtons(); + } + + void InstallUpdateMenu::Draw(NVGcontext *vg, u64 ns) { + const float x = g_screen_width / 2.0f - WindowWidth / 2.0f; + const float y = g_screen_height / 2.0f - WindowHeight / 2.0f; + + DrawWindow(vg, "Installing update", x, y, WindowWidth, WindowHeight); + DrawProgressText(vg, x + HorizontalGap, y + TitleGap, m_progress_percent); + DrawProgressBar(vg, x + HorizontalGap, y + TitleGap + ProgressTextHeight, WindowWidth - HorizontalGap * 2.0f, ProgressBarHeight, m_progress_percent); + DrawTextBackground(vg, x + HorizontalGap, y + TitleGap + ProgressTextHeight + ProgressBarHeight + VerticalGap, WindowWidth - HorizontalGap * 2.0f, TextAreaHeight); + DrawTextBlock(vg, m_log_buffer, x + HorizontalGap + TextHorizontalInset, y + TitleGap + ProgressTextHeight + ProgressBarHeight + VerticalGap + TextVerticalInset, WindowWidth - (HorizontalGap + TextHorizontalInset) * 2.0f, TextAreaHeight - TextVerticalInset * 2.0f); + + this->DrawButtons(vg, ns); + + /* We have drawn now, allow setup to occur. */ + if (m_install_state == InstallState::NeedsDraw) { + this->LogText("Beginning update setup...\n"); + m_install_state = InstallState::NeedsSetup; + } + } + + void InitializeMenu(u32 screen_width, u32 screen_height) { + /* Set the screen width and height. */ + g_screen_width = screen_width; + g_screen_height = screen_height; + + /* Change the current menu to the main menu. */ + g_current_menu = std::make_shared(); + + /* Mark as initialized. */ + g_initialized = true; + } + + void UpdateMenu(u64 ns) { + DBK_ABORT_UNLESS(g_initialized); + DBK_ABORT_UNLESS(g_current_menu != nullptr); + UpdateInput(); + g_current_menu->Update(ns); + } + + void RenderMenu(NVGcontext *vg, u64 ns) { + DBK_ABORT_UNLESS(g_initialized); + DBK_ABORT_UNLESS(g_current_menu != nullptr); + + /* Draw background. */ + DrawBackground(vg, g_screen_width, g_screen_height); + + /* Draw stars. */ + DrawStar(vg, 40.0f, 64.0f, 3.0f); + DrawStar(vg, 110.0f, 300.0f, 3.0f); + DrawStar(vg, 200.0f, 150.0f, 4.0f); + DrawStar(vg, 370.0f, 280.0f, 3.0f); + DrawStar(vg, 450.0f, 40.0f, 3.5f); + DrawStar(vg, 710.0f, 90.0f, 3.0f); + DrawStar(vg, 900.0f, 240.0f, 3.0f); + DrawStar(vg, 970.0f, 64.0f, 4.0f); + DrawStar(vg, 1160.0f, 160.0f, 3.5f); + DrawStar(vg, 1210.0f, 350.0f, 3.0f); + + g_current_menu->Draw(vg, ns); + } + + bool IsExitRequested() { + return g_exit_requested; + } + +} diff --git a/troposphere/daybreak/source/ui.hpp b/troposphere/daybreak/source/ui.hpp new file mode 100644 index 000000000..8afa43b16 --- /dev/null +++ b/troposphere/daybreak/source/ui.hpp @@ -0,0 +1,240 @@ +/* + * Copyright (c) 2020 Adubbz + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see . + */ +#pragma once + +#include +#include +#include +#include +#include +#include +#include "ams_su.h" + +namespace dbk { + + struct Button { + static constexpr u32 InvalidButtonId = -1; + + u32 id; + bool selected; + bool enabled; + char text[256]; + float x; + float y; + float w; + float h; + + inline bool IsPositionInBounds(float x, float y) { + return x >= this->x && y >= this->y && x < (this->x + this->w) && y < (this->y + this->h); + } + }; + + enum class Direction { + Up, + Down, + Left, + Right, + Invalid, + }; + + class Menu { + protected: + static constexpr size_t MaxButtons = 32; + static constexpr size_t LogBufferSize = 0x1000; + protected: + std::array, MaxButtons> m_buttons; + const std::shared_ptr m_prev_menu; + char m_log_buffer[LogBufferSize]; + protected: + void AddButton(u32 id, const char *text, float x, float y, float w, float h); + void SetButtonSelected(u32 id, bool selected); + void DeselectAllButtons(); + void SetButtonEnabled(u32 id, bool enabled); + + Button *GetButton(u32 id); + Button *GetSelectedButton(); + Button *GetClosestButtonToSelection(Direction direction); + Button *GetTouchedButton(); + Button *GetActivatedButton(); + + void UpdateButtons(); + void DrawButtons(NVGcontext *vg, u64 ns); + + void LogText(const char *format, ...); + public: + Menu(std::shared_ptr prev_menu) : m_buttons({}), m_prev_menu(prev_menu), m_log_buffer{} { /* ... */ } + + std::shared_ptr GetPrevMenu(); + virtual void Update(u64 ns) = 0; + virtual void Draw(NVGcontext *vg, u64 ns) = 0; + }; + + class MainMenu : public Menu { + private: + static constexpr u32 InstallButtonId = 0; + static constexpr u32 ExitButtonId = 1; + + static constexpr float WindowWidth = 400.0f; + static constexpr float WindowHeight = 240.0f; + static constexpr float TitleGap = 90.0f; + static constexpr float ButtonHorizontalPadding = 20.0f; + static constexpr float ButtonHeight = 60.0f; + static constexpr float ButtonVerticalGap = 10.0f; + public: + MainMenu(); + + virtual void Update(u64 ns) override; + virtual void Draw(NVGcontext *vg, u64 ns) override; + }; + + class FileMenu : public Menu { + private: + struct FileEntry { + char name[FS_MAX_PATH]; + }; + private: + static constexpr size_t MaxFileRows = 11; + + static constexpr float WindowWidth = 1200.0f; + static constexpr float WindowHeight = 680.0f; + static constexpr float TitleGap = 90.0f; + static constexpr float TextBackgroundOffset = 20.0f; + static constexpr float FileRowHeight = 40.0f; + static constexpr float FileRowGap = 10.0f; + static constexpr float FileRowHorizontalInset = 10.0f; + static constexpr float FileListHeight = MaxFileRows * (FileRowHeight + FileRowGap); + private: + char m_root[FS_MAX_PATH]; + std::vector m_file_entries; + u32 m_current_index; + float m_scroll_offset; + float m_touch_start_scroll_offset; + bool m_touch_finalize_selection; + + Result PopulateFileEntries(); + bool IsSelectionVisible(); + void ScrollToSelection(); + bool IsEntryTouched(u32 i); + void UpdateTouches(); + void FinalizeSelection(); + public: + FileMenu(std::shared_ptr prev_menu, const char *root); + + virtual void Update(u64 ns) override; + virtual void Draw(NVGcontext *vg, u64 ns) override; + }; + + class ValidateUpdateMenu : public Menu { + private: + static constexpr u32 BackButtonId = 0; + static constexpr u32 ContinueButtonId = 1; + + static constexpr float WindowWidth = 600.0f; + static constexpr float WindowHeight = 600.0f; + static constexpr float TitleGap = 90.0f; + static constexpr float BottomGap = 20.0f; + static constexpr float HorizontalGap = 20.0f; + static constexpr float TextAreaHeight = 410.0f; + static constexpr float TextHorizontalInset = 6.0f; + static constexpr float TextVerticalInset = 6.0f; + static constexpr float ButtonHeight = 60.0f; + static constexpr float ButtonHorizontalGap = 10.0f; + static constexpr float ButtonWidth = (WindowWidth - HorizontalGap * 2.0f) / 2.0f - ButtonHorizontalGap; + private: + AmsSuUpdateInformation m_update_info; + AmsSuUpdateValidationInfo m_validation_info; + bool m_has_drawn; + bool m_has_info; + bool m_has_validated; + + Result GetUpdateInformation(); + void ValidateUpdate(); + public: + ValidateUpdateMenu(std::shared_ptr prev_menu); + + virtual void Update(u64 ns) override; + virtual void Draw(NVGcontext *vg, u64 ns) override; + }; + + class ChooseExfatMenu : public Menu { + private: + static constexpr u32 Fat32ButtonId = 0; + static constexpr u32 ExFatButtonId = 1; + + static constexpr float WindowWidth = 600.0f; + static constexpr float WindowHeight = 180.0f; + static constexpr float TitleGap = 90.0f; + static constexpr float ButtonHeight = 60.0f; + static constexpr float ButtonHorizontalInset = 20.0f; + static constexpr float ButtonHorizontalGap = 10.0f; + static constexpr float ButtonWidth = (WindowWidth - ButtonHorizontalInset * 2.0f) / 2.0f - ButtonHorizontalGap; + public: + ChooseExfatMenu(std::shared_ptr prev_menu); + + virtual void Update(u64 ns) override; + virtual void Draw(NVGcontext *vg, u64 ns) override; + }; + + class InstallUpdateMenu : public Menu { + private: + enum class InstallState { + NeedsDraw, + NeedsSetup, + NeedsPrepare, + AwaitingPrepare, + NeedsApply, + AwaitingReboot, + }; + private: + static constexpr u32 ShutdownButtonId = 0; + static constexpr u32 RebootButtonId = 1; + + static constexpr float WindowWidth = 600.0f; + static constexpr float WindowHeight = 600.0f; + static constexpr float TitleGap = 120.0f; + static constexpr float BottomGap = 20.0f; + static constexpr float HorizontalGap = 20.0f; + static constexpr float ProgressTextHeight = 20.0f; + static constexpr float ProgressBarHeight = 30.0f; + static constexpr float VerticalGap = 10.0f; + static constexpr float TextAreaHeight = 320.0f; + static constexpr float TextHorizontalInset = 6.0f; + static constexpr float TextVerticalInset = 6.0f; + static constexpr float ButtonHeight = 60.0f; + static constexpr float ButtonHorizontalGap = 10.0f; + static constexpr float ButtonWidth = (WindowWidth - HorizontalGap * 2.0f) / 2.0f - ButtonHorizontalGap; + + static constexpr size_t UpdateTaskBufferSize = 0x100000; + private: + InstallState m_install_state; + AsyncResult m_prepare_result; + float m_progress_percent; + + void MarkForReboot(); + Result TransitionUpdateState(); + public: + InstallUpdateMenu(std::shared_ptr prev_menu); + + virtual void Update(u64 ns) override; + virtual void Draw(NVGcontext *vg, u64 ns) override; + }; + + void InitializeMenu(u32 screen_width, u32 screen_height); + void UpdateMenu(u64 ns); + void RenderMenu(NVGcontext *vg, u64 ns); + bool IsExitRequested(); + +} diff --git a/troposphere/daybreak/source/ui_util.cpp b/troposphere/daybreak/source/ui_util.cpp new file mode 100644 index 000000000..aa88c4971 --- /dev/null +++ b/troposphere/daybreak/source/ui_util.cpp @@ -0,0 +1,192 @@ +/* + * Copyright (c) 2020 Adubbz + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see . + */ +#include "ui_util.hpp" +#include +#include + +namespace dbk { + + namespace { + + constexpr const char *SwitchStandardFont = "switch-standard"; + constexpr float WindowCornerRadius = 20.0f; + constexpr float TextAreaCornerRadius = 10.0f; + constexpr float ButtonCornerRaidus = 3.0f; + + NVGcolor GetSelectionRGB2(u64 ns) { + /* Calculate the rgb values for the breathing colour effect. */ + const double t = static_cast(ns) / 1'000'000'000.0d; + const float d = -0.5 * cos(3.0f*t) + 0.5f; + const int r2 = 83 + (float)(144 - 83) * (d * 0.7f + 0.3f); + const int g2 = 71 + (float)(185 - 71) * (d * 0.7f + 0.3f); + const int b2 = 185 + (float)(217 - 185) * (d * 0.7f + 0.3f); + return nvgRGB(r2, g2, b2); + } + + } + + void DrawStar(NVGcontext *vg, float x, float y, float width) { + nvgBeginPath(vg); + nvgEllipse(vg, x, y, width, width * 3.0f); + nvgEllipse(vg, x, y, width * 3.0f, width); + nvgFillColor(vg, nvgRGB(65, 71, 115)); + nvgFill(vg); + } + + void DrawBackground(NVGcontext *vg, float w, float h) { + /* Draw the background gradient. */ + const NVGpaint bg_paint = nvgLinearGradient(vg, w / 2.0f, 0, w / 2.0f, h + 20.0f, nvgRGB(20, 24, 50), nvgRGB(46, 57, 127)); + nvgBeginPath(vg); + nvgRect(vg, 0, 0, w, h); + nvgFillPaint(vg, bg_paint); + nvgFill(vg); + } + + void DrawWindow(NVGcontext *vg, const char *title, float x, float y, float w, float h) { + /* Draw the window background. */ + const NVGpaint window_bg_paint = nvgLinearGradient(vg, x + w / 2.0f, y, x + w / 2.0f, y + h + h / 4.0f, nvgRGB(255, 255, 255), nvgRGB(188, 214, 234)); + nvgBeginPath(vg); + nvgRoundedRect(vg, x, y, w, h, WindowCornerRadius); + nvgFillPaint(vg, window_bg_paint); + nvgFill(vg); + + /* Draw the shadow surrounding the window. */ + NVGpaint shadowPaint = nvgBoxGradient(vg, x, y + 2, w, h, WindowCornerRadius * 2, 10, nvgRGBA(0, 0, 0, 128), nvgRGBA(0, 0, 0, 0)); + nvgBeginPath(vg); + nvgRect(vg, x - 10, y - 10, w + 20, h + 30); + nvgRoundedRect(vg, x, y, w, h, WindowCornerRadius); + nvgPathWinding(vg, NVG_HOLE); + nvgFillPaint(vg, shadowPaint); + nvgFill(vg); + + /* Setup the font. */ + nvgFontSize(vg, 32.0f); + nvgFontFace(vg, SwitchStandardFont); + nvgTextAlign(vg, NVG_ALIGN_LEFT | NVG_ALIGN_MIDDLE); + nvgFillColor(vg, nvgRGB(0, 0, 0)); + + /* Draw the title. */ + const float tw = nvgTextBounds(vg, 0, 0, title, nullptr, nullptr); + nvgText(vg, x + w * 0.5f - tw * 0.5f, y + 40.0f, title, nullptr); + } + + void DrawButton(NVGcontext *vg, const char *text, float x, float y, float w, float h, ButtonStyle style, u64 ns) { + /* Fill the background if selected. */ + if (style == ButtonStyle::StandardSelected || style == ButtonStyle::FileSelectSelected) { + NVGpaint bg_paint = nvgLinearGradient(vg, x, y + h / 2.0f, x + w, y + h / 2.0f, nvgRGB(83, 71, 185), GetSelectionRGB2(ns)); + nvgBeginPath(vg); + nvgRoundedRect(vg, x, y, w, h, ButtonCornerRaidus); + nvgFillPaint(vg, bg_paint); + nvgFill(vg); + } + + /* Draw the shadow surrounding the button. */ + if (style == ButtonStyle::Standard || style == ButtonStyle::StandardSelected || style == ButtonStyle::StandardDisabled || style == ButtonStyle::FileSelectSelected) { + const unsigned char shadow_color = style == ButtonStyle::Standard ? 128 : 64; + NVGpaint shadow_paint = nvgBoxGradient(vg, x, y, w, h, ButtonCornerRaidus, 5, nvgRGBA(0, 0, 0, shadow_color), nvgRGBA(0, 0, 0, 0)); + nvgBeginPath(vg); + nvgRect(vg, x - 10, y - 10, w + 20, h + 30); + nvgRoundedRect(vg, x, y, w, h, ButtonCornerRaidus); + nvgPathWinding(vg, NVG_HOLE); + nvgFillPaint(vg, shadow_paint); + nvgFill(vg); + } + + /* Setup the font. */ + nvgFontSize(vg, 20.0f); + nvgFontFace(vg, SwitchStandardFont); + nvgTextAlign(vg, NVG_ALIGN_LEFT | NVG_ALIGN_MIDDLE); + + /* Set the text colour. */ + if (style == ButtonStyle::StandardSelected || style == ButtonStyle::FileSelectSelected) { + nvgFillColor(vg, nvgRGB(255, 255, 255)); + } else { + const unsigned char alpha = style == ButtonStyle::StandardDisabled ? 64 : 255; + nvgFillColor(vg, nvgRGBA(0, 0, 0, alpha)); + } + + /* Draw the button text. */ + const float tw = nvgTextBounds(vg, 0, 0, text, nullptr, nullptr); + + if (style == ButtonStyle::Standard || style == ButtonStyle::StandardSelected || style == ButtonStyle::StandardDisabled) { + nvgText(vg, x + w * 0.5f - tw * 0.5f, y + h * 0.5f, text, nullptr); + } else { + nvgText(vg, x + 10.0f, y + h * 0.5f, text, nullptr); + } + } + + void DrawTextBackground(NVGcontext *vg, float x, float y, float w, float h) { + nvgBeginPath(vg); + nvgRoundedRect(vg, x, y, w, h, TextAreaCornerRadius); + nvgFillColor(vg, nvgRGBA(0, 0, 0, 16)); + nvgFill(vg); + } + + void DrawProgressText(NVGcontext *vg, float x, float y, float progress) { + char progress_text[32] = {}; + snprintf(progress_text, sizeof(progress_text)-1, "%d%% complete", static_cast(progress * 100.0f)); + + nvgFontSize(vg, 24.0f); + nvgFontFace(vg, SwitchStandardFont); + nvgTextAlign(vg, NVG_ALIGN_LEFT | NVG_ALIGN_MIDDLE); + nvgFillColor(vg, nvgRGB(0, 0, 0)); + nvgText(vg, x, y, progress_text, nullptr); + } + + void DrawProgressBar(NVGcontext *vg, float x, float y, float w, float h, float progress) { + /* Draw the progress bar background. */ + nvgBeginPath(vg); + nvgRoundedRect(vg, x, y, w, h, WindowCornerRadius); + nvgFillColor(vg, nvgRGBA(0, 0, 0, 128)); + nvgFill(vg); + + /* Draw the progress bar fill. */ + if (progress > 0.0f) { + NVGpaint progress_fill_paint = nvgLinearGradient(vg, x, y + 0.5f * h, x + w, y + 0.5f * h, nvgRGB(83, 71, 185), nvgRGB(144, 185, 217)); + nvgBeginPath(vg); + nvgRoundedRect(vg, x, y, WindowCornerRadius + (w - WindowCornerRadius) * progress, h, WindowCornerRadius); + nvgFillPaint(vg, progress_fill_paint); + nvgFill(vg); + } + } + + void DrawTextBlock(NVGcontext *vg, const char *text, float x, float y, float w, float h) { + /* Save state and scissor. */ + nvgSave(vg); + nvgScissor(vg, x, y, w, h); + + /* Configure the text. */ + nvgFontSize(vg, 18.0f); + nvgFontFace(vg, SwitchStandardFont); + nvgTextAlign(vg, NVG_ALIGN_LEFT | NVG_ALIGN_TOP); + nvgFillColor(vg, nvgRGB(0, 0, 0)); + + /* Determine the bounds of the text box. */ + float bounds[4]; + nvgTextBoxBounds(vg, 0, 0, w, text, nullptr, bounds); + + /* Adjust the y to only show the last part of the text that fits. */ + float y_adjustment = 0.0f; + if (bounds[3] > h) { + y_adjustment = bounds[3] - h; + } + + /* Draw the text box and restore state. */ + nvgTextBox(vg, x, y - y_adjustment, w, text, nullptr); + nvgRestore(vg); + } + +} diff --git a/troposphere/daybreak/source/ui_util.hpp b/troposphere/daybreak/source/ui_util.hpp new file mode 100644 index 000000000..4522760ab --- /dev/null +++ b/troposphere/daybreak/source/ui_util.hpp @@ -0,0 +1,39 @@ +/* + * Copyright (c) 2020 Adubbz + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see . + */ +#pragma once +#include +#include + +namespace dbk { + + enum class ButtonStyle { + Standard, + StandardSelected, + StandardDisabled, + FileSelect, + FileSelectSelected, + }; + + void DrawStar(NVGcontext *vg, float x, float y, float width); + void DrawBackground(NVGcontext *vg, float w, float h); + void DrawWindow(NVGcontext *vg, const char *title, float x, float y, float w, float h); + void DrawButton(NVGcontext *vg, const char *text, float x, float y, float w, float h, ButtonStyle style, u64 ns); + void DrawTextBackground(NVGcontext *vg, float x, float y, float w, float h); + void DrawProgressText(NVGcontext *vg, float x, float y, float progress); + void DrawProgressBar(NVGcontext *vg, float x, float y, float w, float h, float progress); + void DrawTextBlock(NVGcontext *vg, const char *text, float x, float y, float w, float h); + +}