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hekate/nyx/nyx_gui/libs/lvgl/lv_objx/lv_img.c
ctcaer@gmail.com c41f98039c [Nyx] Introducing hekate GUI, named Nyx! 
Version 0.8.0.

Expect dragons!
2019-06-30 04:03:00 +03:00

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/**
* @file lv_img.c
*
*/
/*********************
* INCLUDES
*********************/
#include "lv_img.h"
#if USE_LV_IMG != 0
/*Testing of dependencies*/
#if USE_LV_LABEL == 0
#error "lv_img: lv_label is required. Enable it in lv_conf.h (USE_LV_LABEL 1) "
#endif
#include "../lv_core/lv_lang.h"
#include "../lv_themes/lv_theme.h"
#include "../lv_misc/lv_fs.h"
#include "../lv_misc/lv_ufs.h"
#include "../lv_misc/lv_txt.h"
#include "../lv_misc/lv_log.h"
/*********************
* DEFINES
*********************/
/**********************
* TYPEDEFS
**********************/
/**********************
* STATIC PROTOTYPES
**********************/
static bool lv_img_design(lv_obj_t * img, const lv_area_t * mask, lv_design_mode_t mode);
static lv_res_t lv_img_signal(lv_obj_t * img, lv_signal_t sign, void * param);
/**********************
* STATIC VARIABLES
**********************/
static lv_signal_func_t ancestor_signal;
/**********************
* MACROS
**********************/
/**********************
* GLOBAL FUNCTIONS
**********************/
/**
* Create an image objects
* @param par pointer to an object, it will be the parent of the new button
* @param copy pointer to a image object, if not NULL then the new object will be copied from it
* @return pointer to the created image
*/
lv_obj_t * lv_img_create(lv_obj_t * par, const lv_obj_t * copy)
{
LV_LOG_TRACE("image create started");
lv_obj_t * new_img = NULL;
/*Create a basic object*/
new_img = lv_obj_create(par, copy);
lv_mem_assert(new_img);
if(new_img == NULL) return NULL;
if(ancestor_signal == NULL) ancestor_signal = lv_obj_get_signal_func(new_img);
/*Extend the basic object to image object*/
lv_img_ext_t * ext = lv_obj_allocate_ext_attr(new_img, sizeof(lv_img_ext_t));
lv_mem_assert(ext);
if(ext == NULL) return NULL;
ext->src = NULL;
ext->src_type = LV_IMG_SRC_UNKNOWN;
ext->cf = LV_IMG_CF_UNKOWN;
ext->w = lv_obj_get_width(new_img);
ext->h = lv_obj_get_height(new_img);
ext->auto_size = 1;
#if USE_LV_MULTI_LANG
ext->lang_txt_id = LV_LANG_TXT_ID_NONE;
#endif
/*Init the new object*/
lv_obj_set_signal_func(new_img, lv_img_signal);
lv_obj_set_design_func(new_img, lv_img_design);
if(copy == NULL) {
lv_obj_set_click(new_img, false);
/* Enable auto size for non screens
* because image screens are wallpapers
* and must be screen sized*/
if(par != NULL) {
ext->auto_size = 1;
lv_obj_set_style(new_img, NULL); /*Inherit the style by default*/
} else {
ext->auto_size = 0;
lv_obj_set_style(new_img, &lv_style_plain); /*Set a style for screens*/
}
} else {
lv_img_ext_t * copy_ext = lv_obj_get_ext_attr(copy);
ext->auto_size = copy_ext->auto_size;
lv_img_set_src(new_img, copy_ext->src);
/*Refresh the style with new signal function*/
lv_obj_refresh_style(new_img);
}
LV_LOG_INFO("image created");
return new_img;
}
/*=====================
* Setter functions
*====================*/
/**
* Set the pixel map to display by the image
* @param img pointer to an image object
* @param data the image data
*/
void lv_img_set_src(lv_obj_t * img, const void * src_img)
{
lv_img_src_t src_type = lv_img_src_get_type(src_img);
lv_img_ext_t * ext = lv_obj_get_ext_attr(img);
#if LV_LOG_LEVEL >= LV_LOG_LEVEL_INFO
switch(src_type) {
case LV_IMG_SRC_FILE:
LV_LOG_TRACE("lv_img_set_src: `LV_IMG_SRC_FILE` type found");
break;
case LV_IMG_SRC_VARIABLE:
LV_LOG_TRACE("lv_img_set_src: `LV_IMG_SRC_VARIABLE` type found");
break;
case LV_IMG_SRC_SYMBOL:
LV_LOG_TRACE("lv_img_set_src: `LV_IMG_SRC_SYMBOL` type found");
break;
default:
LV_LOG_WARN("lv_img_set_src: unknown type");
}
#endif
/*If the new source type is unknown free the memories of the old source*/
if(src_type == LV_IMG_SRC_UNKNOWN) {
LV_LOG_WARN("lv_img_set_src: unknown image type");
if(ext->src_type == LV_IMG_SRC_SYMBOL || ext->src_type == LV_IMG_SRC_FILE) {
lv_mem_free(ext->src);
}
ext->src = NULL;
ext->src_type = LV_IMG_SRC_UNKNOWN;
return;
}
lv_img_header_t header;
lv_img_dsc_get_info(src_img, &header);
/*Save the source*/
if(src_type == LV_IMG_SRC_VARIABLE) {
LV_LOG_INFO("lv_img_set_src: `LV_IMG_SRC_VARIABLE` type found");
/*If memory was allocated because of the previous `src_type` then free it*/
if(ext->src_type == LV_IMG_SRC_FILE || ext->src_type == LV_IMG_SRC_SYMBOL) {
lv_mem_free(ext->src);
}
ext->src = src_img;
} else if(src_type == LV_IMG_SRC_FILE || src_type == LV_IMG_SRC_SYMBOL) {
/* If the new and the old src are the same then it was only a refresh.*/
if(ext->src != src_img) {
/*If memory was allocated because of the previous `src_type` then free it*/
if(ext->src_type == LV_IMG_SRC_FILE || ext->src_type == LV_IMG_SRC_SYMBOL) {
lv_mem_free(ext->src);
}
char * new_str = lv_mem_alloc(strlen(src_img) + 1);
lv_mem_assert(new_str);
if(new_str == NULL) return;
strcpy(new_str, src_img);
ext->src = new_str;
}
}
if(src_type == LV_IMG_SRC_SYMBOL) {
/*`lv_img_dsc_get_info` couldn't set the with and height of a font so set it here*/
lv_style_t * style = lv_img_get_style(img);
lv_point_t size;
lv_txt_get_size(&size, src_img, style->text.font, style->text.letter_space, style->text.line_space, LV_COORD_MAX, LV_TXT_FLAG_NONE);
header.w = size.x;
header.h = size.y;
}
ext->src_type = src_type;
ext->w = header.w;
ext->h = header.h;
ext->cf = header.cf;
if(lv_img_get_auto_size(img) != false) {
lv_obj_set_size(img, ext->w, ext->h);
}
lv_obj_invalidate(img);
}
#if USE_LV_MULTI_LANG
/**
* Set an ID which means a the same source but in different languages
* @param img pointer to an image object
* @param src_id ID of the source
*/
void lv_img_set_src_id(lv_obj_t * img, uint32_t src_id)
{
lv_img_ext_t * ext = lv_obj_get_ext_attr(img);
ext->lang_txt_id = src_id;
/*Apply the new language*/
img->signal_func(img, LV_SIGNAL_LANG_CHG, NULL);
}
#endif
/**
* Enable the auto size feature.
* If enabled the object size will be same as the picture size.
* @param img pointer to an image
* @param en true: auto size enable, false: auto size disable
*/
void lv_img_set_auto_size(lv_obj_t * img, bool en)
{
lv_img_ext_t * ext = lv_obj_get_ext_attr(img);
ext->auto_size = (en == false ? 0 : 1);
}
/*=====================
* Getter functions
*====================*/
/**
* Get the source of the image
* @param img pointer to an image object
* @return the image source (symbol, file name or C array)
*/
const void * lv_img_get_src(lv_obj_t * img)
{
lv_img_ext_t * ext = lv_obj_get_ext_attr(img);
return ext->src;
}
/**
* Get the name of the file set for an image
* @param img pointer to an image
* @return file name
*/
const char * lv_img_get_file_name(const lv_obj_t * img)
{
lv_img_ext_t * ext = lv_obj_get_ext_attr(img);
if(ext->src_type == LV_IMG_SRC_FILE) return ext->src;
else return "";
}
#if USE_LV_MULTI_LANG
/**
* Get the source ID of the image. (Used by the multi-language feature)
* @param img pointer to an image
* @return ID of the source
*/
uint16_t lv_img_get_src_id(lv_obj_t * img)
{
lv_img_ext_t * ext = lv_obj_get_ext_attr(img);
return ext->lang_txt_id;
}
#endif
/**
* Get the auto size enable attribute
* @param img pointer to an image
* @return true: auto size is enabled, false: auto size is disabled
*/
bool lv_img_get_auto_size(const lv_obj_t * img)
{
lv_img_ext_t * ext = lv_obj_get_ext_attr(img);
return ext->auto_size == 0 ? false : true;
}
/**********************
* STATIC FUNCTIONS
**********************/
/**
* Handle the drawing related tasks of the images
* @param img pointer to an object
* @param mask the object will be drawn only in this area
* @param mode LV_DESIGN_COVER_CHK: only check if the object fully covers the 'mask_p' area
* (return 'true' if yes)
* LV_DESIGN_DRAW: draw the object (always return 'true')
* LV_DESIGN_DRAW_POST: drawing after every children are drawn
* @param return true/false, depends on 'mode'
*/
static bool lv_img_design(lv_obj_t * img, const lv_area_t * mask, lv_design_mode_t mode)
{
lv_style_t * style = lv_obj_get_style(img);
lv_img_ext_t * ext = lv_obj_get_ext_attr(img);
if(mode == LV_DESIGN_COVER_CHK) {
bool cover = false;
if(ext->src_type == LV_IMG_SRC_UNKNOWN || ext->src_type == LV_IMG_SRC_SYMBOL) return false;
if(ext->cf == LV_IMG_CF_TRUE_COLOR || ext->cf == LV_IMG_CF_RAW) cover = lv_area_is_in(mask, &img->coords);
return cover;
} else if(mode == LV_DESIGN_DRAW_MAIN) {
if(ext->h == 0 || ext->w == 0) return true;
lv_area_t coords;
lv_opa_t opa_scale = lv_obj_get_opa_scale(img);
lv_obj_get_coords(img, &coords);
if(ext->src_type == LV_IMG_SRC_FILE || ext->src_type == LV_IMG_SRC_VARIABLE) {
LV_LOG_TRACE("lv_img_design: start to draw image");
lv_area_t cords_tmp;
cords_tmp.y1 = coords.y1;
cords_tmp.y2 = coords.y1 + ext->h - 1;
for(; cords_tmp.y1 < coords.y2; cords_tmp.y1 += ext->h, cords_tmp.y2 += ext->h) {
cords_tmp.x1 = coords.x1;
cords_tmp.x2 = coords.x1 + ext->w - 1;
for(; cords_tmp.x1 < coords.x2; cords_tmp.x1 += ext->w, cords_tmp.x2 += ext->w) {
lv_draw_img(&cords_tmp, mask, ext->src, style, opa_scale);
}
}
} else if(ext->src_type == LV_IMG_SRC_SYMBOL) {
LV_LOG_TRACE("lv_img_design: start to draw symbol");
lv_style_t style_mod;
lv_style_copy(&style_mod, style);
style_mod.text.color = style->image.color;
lv_draw_label(&coords, mask, &style_mod, opa_scale, ext->src, LV_TXT_FLAG_NONE, NULL);
} else {
/*Trigger the error handler of image drawer*/
LV_LOG_WARN("lv_img_design: image source type is unknown");
lv_draw_img(&img->coords, mask, NULL, style, opa_scale);
}
}
return true;
}
/**
* Signal function of the image
* @param img pointer to an image object
* @param sign a signal type from lv_signal_t enum
* @param param pointer to a signal specific variable
* @return LV_RES_OK: the object is not deleted in the function; LV_RES_INV: the object is deleted
*/
static lv_res_t lv_img_signal(lv_obj_t * img, lv_signal_t sign, void * param)
{
lv_res_t res;
/* Include the ancient signal function */
res = ancestor_signal(img, sign, param);
if(res != LV_RES_OK) return res;
lv_img_ext_t * ext = lv_obj_get_ext_attr(img);
if(sign == LV_SIGNAL_CLEANUP) {
if(ext->src_type == LV_IMG_SRC_FILE || ext->src_type == LV_IMG_SRC_SYMBOL) {
lv_mem_free(ext->src);
ext->src = NULL;
ext->src_type = LV_IMG_SRC_UNKNOWN;
}
} else if(sign == LV_SIGNAL_STYLE_CHG) {
/*Refresh the file name to refresh the symbol text size*/
if(ext->src_type == LV_IMG_SRC_SYMBOL) {
lv_img_set_src(img, ext->src);
}
} else if(sign == LV_SIGNAL_LANG_CHG) {
#if USE_LV_MULTI_LANG
if(ext->lang_txt_id != LV_LANG_TXT_ID_NONE) {
const char * lang_src = lv_lang_get_text(ext->lang_txt_id);
if(lang_src) {
lv_img_set_src(img, lang_src);
} else {
LV_LOG_WARN("lv_lang_get_text return NULL for an image's source");
}
}
#endif
} else if(sign == LV_SIGNAL_GET_TYPE) {
lv_obj_type_t * buf = param;
uint8_t i;
for(i = 0; i < LV_MAX_ANCESTOR_NUM - 1; i++) { /*Find the last set data*/
if(buf->type[i] == NULL) break;
}
buf->type[i] = "lv_img";
}
return res;
}
#endif
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