hekate/nyx/nyx_gui/libs/lvgl/lv_objx/lv_canvas.c

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/**
* @file lv_canvas.c
*
*/
/*********************
* INCLUDES
*********************/
#include "lv_canvas.h"
#if USE_LV_CANVAS != 0
/*********************
* DEFINES
*********************/
/**********************
* TYPEDEFS
**********************/
/**********************
* STATIC PROTOTYPES
**********************/
static lv_res_t lv_canvas_signal(lv_obj_t * canvas, lv_signal_t sign, void * param);
/**********************
* STATIC VARIABLES
**********************/
static lv_signal_func_t ancestor_signal;
static lv_design_func_t ancestor_design;
/**********************
* MACROS
**********************/
/**********************
* GLOBAL FUNCTIONS
**********************/
/**
* Create a canvas object
* @param par pointer to an object, it will be the parent of the new canvas
* @param copy pointer to a canvas object, if not NULL then the new object will be copied from it
* @return pointer to the created canvas
*/
lv_obj_t * lv_canvas_create(lv_obj_t * par, const lv_obj_t * copy)
{
LV_LOG_TRACE("canvas create started");
/*Create the ancestor of canvas*/
lv_obj_t * new_canvas = lv_img_create(par, copy);
lv_mem_assert(new_canvas);
if(new_canvas == NULL) return NULL;
/*Allocate the canvas type specific extended data*/
lv_canvas_ext_t * ext = lv_obj_allocate_ext_attr(new_canvas, sizeof(lv_canvas_ext_t));
lv_mem_assert(ext);
if(ext == NULL) return NULL;
if(ancestor_signal == NULL) ancestor_signal = lv_obj_get_signal_func(new_canvas);
if(ancestor_design == NULL) ancestor_design = lv_obj_get_design_func(new_canvas);
/*Initialize the allocated 'ext' */
ext->dsc.header.always_zero = 0;
ext->dsc.header.cf = LV_IMG_CF_TRUE_COLOR;
ext->dsc.header.h = 0;
ext->dsc.header.w = 0;
ext->dsc.data_size = 0;
ext->dsc.data = NULL;
lv_img_set_src(new_canvas, &ext->dsc);
/*The signal and design functions are not copied so set them here*/
lv_obj_set_signal_func(new_canvas, lv_canvas_signal);
/*Init the new canvas canvas*/
if(copy == NULL) {
}
/*Copy an existing canvas*/
else {
//lv_canvas_ext_t * copy_ext = lv_obj_get_ext_attr(copy);
/*Refresh the style with new signal function*/
lv_obj_refresh_style(new_canvas);
}
LV_LOG_INFO("canvas created");
return new_canvas;
}
/*=====================
* Setter functions
*====================*/
/**
* Set a buffer for the canvas.
* @param buf a buffer where the content of the canvas will be.
* The required size is (lv_img_color_format_get_px_size(cf) * w * h) / 8)
* It can be allocated with `lv_mem_alloc()` or
* it can be statically allocated array (e.g. static lv_color_t buf[100*50]) or
* it can be an address in RAM or external SRAM
* @param canvas pointer to a canvas object
* @param w width of the canvas
* @param h height of the canvas
* @param cf color format. The following formats are supported:
* LV_IMG_CF_TRUE_COLOR, LV_IMG_CF_TRUE_COLOR_CHROMA_KEYED, LV_IMG_CF_INDEXES_1/2/4/8BIT
*
*/
void lv_canvas_set_buffer(lv_obj_t * canvas, void * buf, lv_coord_t w, lv_coord_t h, lv_img_cf_t cf)
{
lv_canvas_ext_t * ext = lv_obj_get_ext_attr(canvas);
ext->dsc.header.cf = cf;
ext->dsc.header.w = w;
ext->dsc.header.h = h;
ext->dsc.data = buf;
ext->dsc.data_size = (lv_img_color_format_get_px_size(cf) * w * h) / 8;
lv_img_set_src(canvas, &ext->dsc);
}
/**
* Set the color of a pixel on the canvas
* @param canvas
* @param x x coordinate of the point to set
* @param y x coordinate of the point to set
* @param c color of the point
*/
void lv_canvas_set_px(lv_obj_t * canvas, lv_coord_t x, lv_coord_t y, lv_color_t c)
{
lv_canvas_ext_t * ext = lv_obj_get_ext_attr(canvas);
if(x >= ext->dsc.header.w || y >= ext->dsc.header.h) {
LV_LOG_WARN("lv_canvas_set_px: x or y out of the canvas");
return;
}
uint8_t * buf_u8 = (uint8_t *) ext->dsc.data;
if(ext->dsc.header.cf == LV_IMG_CF_TRUE_COLOR ||
ext->dsc.header.cf == LV_IMG_CF_TRUE_COLOR_CHROMA_KEYED)
{
uint32_t px = ext->dsc.header.w * y * sizeof(lv_color_t) + x * sizeof(lv_color_t);
memcpy(&buf_u8[px], &c, sizeof(lv_color_t));
}
else if(ext->dsc.header.cf == LV_IMG_CF_INDEXED_1BIT) {
buf_u8 += 4 * 2;
uint8_t bit = x & 0x7;
x = x >> 3;
uint32_t px = (ext->dsc.header.w >> 3) * y + x;
buf_u8[px] = buf_u8[px] & ~(1 << (7 - bit));
buf_u8[px] = buf_u8[px] | ((c.full & 0x1) << (7 - bit));
}
else if(ext->dsc.header.cf == LV_IMG_CF_INDEXED_2BIT) {
buf_u8 += 4 * 4;
uint8_t bit = (x & 0x3) * 2;
x = x >> 2;
uint32_t px = (ext->dsc.header.w >> 2) * y + x;
buf_u8[px] = buf_u8[px] & ~(3 << (6 - bit));
buf_u8[px] = buf_u8[px] | ((c.full & 0x3) << (6 - bit));
}
else if(ext->dsc.header.cf == LV_IMG_CF_INDEXED_4BIT) {
buf_u8 += 4 * 16;
uint8_t bit = (x & 0x1) * 4;
x = x >> 1;
uint32_t px = (ext->dsc.header.w >> 1) * y + x;
buf_u8[px] = buf_u8[px] & ~(0xF << (4 - bit));
buf_u8[px] = buf_u8[px] | ((c.full & 0xF) << (4 - bit));
}
else if(ext->dsc.header.cf == LV_IMG_CF_INDEXED_8BIT) {
buf_u8 += 4 * 256;
uint32_t px = ext->dsc.header.w * y + x;
buf_u8[px] = c.full;
}
}
/**
* Set a style of a canvas.
* @param canvas pointer to canvas object
* @param type which style should be set
* @param style pointer to a style
*/
void lv_canvas_set_style(lv_obj_t * canvas, lv_canvas_style_t type, lv_style_t * style)
{
switch(type) {
case LV_CANVAS_STYLE_MAIN:
lv_img_set_style(canvas, style);
break;
}
}
/*=====================
* Getter functions
*====================*/
/**
* Get the color of a pixel on the canvas
* @param canvas
* @param x x coordinate of the point to set
* @param y x coordinate of the point to set
* @return color of the point
*/
lv_color_t lv_canvas_get_px(lv_obj_t * canvas, lv_coord_t x, lv_coord_t y)
{
lv_color_t p_color = LV_COLOR_BLACK;
lv_canvas_ext_t * ext = lv_obj_get_ext_attr(canvas);
if(x >= ext->dsc.header.w || y >= ext->dsc.header.h) {
LV_LOG_WARN("lv_canvas_get_px: x or y out of the canvas");
return p_color;
}
uint8_t * buf_u8 = (uint8_t *) ext->dsc.data;
if(ext->dsc.header.cf == LV_IMG_CF_TRUE_COLOR ||
ext->dsc.header.cf == LV_IMG_CF_TRUE_COLOR_CHROMA_KEYED)
{
uint32_t px = ext->dsc.header.w * y * sizeof(lv_color_t) + x * sizeof(lv_color_t);
memcpy(&p_color, &buf_u8[px], sizeof(lv_color_t));
}
else if(ext->dsc.header.cf == LV_IMG_CF_INDEXED_1BIT) {
buf_u8 += 4 * 2;
uint8_t bit = x & 0x7;
x = x >> 3;
uint32_t px = (ext->dsc.header.w >> 3) * y + x;
p_color.full = (buf_u8[px] & (1 << (7 - bit))) >> (7 - bit);
}
else if(ext->dsc.header.cf == LV_IMG_CF_INDEXED_2BIT) {
buf_u8 += 4 * 4;
uint8_t bit = (x & 0x3) * 2;
x = x >> 2;
uint32_t px = (ext->dsc.header.w >> 2) * y + x;
p_color.full = (buf_u8[px] & (3 << (6 - bit))) >> (6 - bit);
}
else if(ext->dsc.header.cf == LV_IMG_CF_INDEXED_4BIT) {
buf_u8 += 4 * 16;
uint8_t bit = (x & 0x1) * 4;
x = x >> 1;
uint32_t px = (ext->dsc.header.w >> 1) * y + x;
p_color.full = (buf_u8[px] & (0xF << (4 - bit))) >> (4 - bit);
}
else if(ext->dsc.header.cf == LV_IMG_CF_INDEXED_8BIT) {
buf_u8 += 4 * 256;
uint32_t px = ext->dsc.header.w * y + x;
p_color.full = buf_u8[px];
}
return p_color;
}
/**
* Get style of a canvas.
* @param canvas pointer to canvas object
* @param type which style should be get
* @return style pointer to the style
*/
lv_style_t * lv_canvas_get_style(const lv_obj_t * canvas, lv_canvas_style_t type)
{
// lv_canvas_ext_t * ext = lv_obj_get_ext_attr(canvas);
lv_style_t * style = NULL;
switch(type) {
case LV_CANVAS_STYLE_MAIN:
style = lv_img_get_style(canvas);
break;
default:
style = NULL;
}
return style;
}
/*=====================
* Other functions
*====================*/
/**
* Copy a buffer to the canvas
* @param canvas pointer to a canvas object
* @param to_copy buffer to copy. The color format has to match with the canvas's buffer color format
* @param w width of the buffer to copy
* @param h height of the buffer to copy
* @param x left side of the destination position
* @param y top side of the destination position
*/
void lv_canvas_copy_buf(lv_obj_t * canvas, const void * to_copy, lv_coord_t w, lv_coord_t h, lv_coord_t x, lv_coord_t y)
{
lv_canvas_ext_t * ext = lv_obj_get_ext_attr(canvas);
if(x + w >= ext->dsc.header.w || y + h >= ext->dsc.header.h) {
LV_LOG_WARN("lv_canvas_copy_buf: x or y out of the canvas");
return;
}
uint32_t px_size = lv_img_color_format_get_px_size(ext->dsc.header.cf) >> 3;
uint32_t px = ext->dsc.header.w * y * px_size + x * px_size;
uint8_t * to_copy8 = (uint8_t *) to_copy;
lv_coord_t i;
for(i = 0; i < h; i++) {
memcpy((void*)&ext->dsc.data[px], to_copy8, w * px_size);
px += ext->dsc.header.w * px_size;
to_copy8 += w * px_size;
}
}
/**
* Multiply a buffer with the canvas
* @param canvas pointer to a canvas object
* @param to_copy buffer to copy (multiply). LV_IMG_CF_TRUE_COLOR_ALPHA is not supported
* @param w width of the buffer to copy
* @param h height of the buffer to copy
* @param x left side of the destination position
* @param y top side of the destination position
*/
void lv_canvas_mult_buf(lv_obj_t * canvas, void * to_copy, lv_coord_t w, lv_coord_t h, lv_coord_t x, lv_coord_t y)
{
lv_canvas_ext_t * ext = lv_obj_get_ext_attr(canvas);
if(x + w >= ext->dsc.header.w || y + h >= ext->dsc.header.h) {
LV_LOG_WARN("lv_canvas_mult_buf: x or y out of the canvas");
return;
}
if(ext->dsc.header.cf == LV_IMG_CF_TRUE_COLOR_ALPHA) {
LV_LOG_WARN("lv_canvas_mult_buf: LV_IMG_CF_TRUE_COLOR_ALPHA is not supported");
return;
}
uint32_t px_size = lv_img_color_format_get_px_size(ext->dsc.header.cf) >> 3;
uint32_t px = ext->dsc.header.w * y * px_size + x * px_size;
lv_color_t * copy_buf_color = (lv_color_t *) to_copy;
lv_color_t * canvas_buf_color = (lv_color_t *) &ext->dsc.data[px];
lv_coord_t i;
lv_coord_t j;
for(i = 0; i < h; i++) {
for(j = 0; j < w; j++) {
#if LV_COLOR_DEPTH == 32
canvas_buf_color[j].red = (uint16_t) ((uint16_t) canvas_buf_color[j].red * copy_buf_color[j].red) >> 8;
canvas_buf_color[j].green = (uint16_t) ((uint16_t) canvas_buf_color[j].green * copy_buf_color[j].green) >> 8;
canvas_buf_color[j].blue = (uint16_t) ((uint16_t) canvas_buf_color[j].blue * copy_buf_color[j].blue) >> 8;
#elif LV_COLOR_DEPTH == 16
canvas_buf_color[j].red = (uint16_t) ((uint16_t) canvas_buf_color[j].red * copy_buf_color[j].red) >> 5;
canvas_buf_color[j].blue = (uint16_t) ((uint16_t) canvas_buf_color[j].blue * copy_buf_color[j].blue) >> 5;
# if LV_COLOR_16_SWAP == 0
canvas_buf_color[j].green = (uint16_t) ((uint16_t) canvas_buf_color[j].green * copy_buf_color[j].green) >> 6;
# else
uint8_t green_canvas = (canvas_buf_color[j].green_h << 3) + (canvas_buf_color[j].green_l);
uint8_t green_buf = (copy_buf_color[j].green_h << 3) + (copy_buf_color[j].green_l);
uint8_t green_res = (uint16_t)((uint16_t)green_canvas * green_buf) >> 6;
canvas_buf_color[j].green_h = (green_res >> 3) & 0x07;
canvas_buf_color[j].green_l = green_res & 0x07;
# endif /*LV_COLOR_16_SWAP*/
#elif LV_COLOR_DEPTH == 8
canvas_buf_color[j].red = (uint16_t) ((uint16_t) canvas_buf_color[j].red * copy_buf_color[j].red) >> 3;
canvas_buf_color[j].green = (uint16_t) ((uint16_t) canvas_buf_color[j].green * copy_buf_color[j].green) >> 3;
canvas_buf_color[j].blue = (uint16_t) ((uint16_t) canvas_buf_color[j].blue * copy_buf_color[j].blue) >> 2;
#endif
}
copy_buf_color += w;
canvas_buf_color += ext->dsc.header.w;
}
}
/**
* Draw circle function of the canvas
* @param canvas pointer to a canvas object
* @param x0 x coordinate of the circle
* @param y0 y coordinate of the circle
* @param radius radius of the circle
* @param color border color of the circle
*/
void lv_canvas_draw_circle(lv_obj_t * canvas, lv_coord_t x0, lv_coord_t y0, lv_coord_t radius, lv_color_t color)
{
int x = radius;
int y = 0;
int err = 0;
while (x >= y)
{
lv_canvas_set_px(canvas, x0 + x, y0 + y, color);
lv_canvas_set_px(canvas, x0 + y, y0 + x, color);
lv_canvas_set_px(canvas, x0 - y, y0 + x, color);
lv_canvas_set_px(canvas, x0 - x, y0 + y, color);
lv_canvas_set_px(canvas, x0 - x, y0 - y, color);
lv_canvas_set_px(canvas, x0 - y, y0 - x, color);
lv_canvas_set_px(canvas, x0 + y, y0 - x, color);
lv_canvas_set_px(canvas, x0 + x, y0 - y, color);
if (err <= 0)
{
y += 1;
err += 2*y + 1;
}
if (err > 0)
{
x -= 1;
err -= 2*x + 1;
}
}
}
/**
* Draw line function of the canvas
* @param canvas pointer to a canvas object
* @param point1 start point of the line
* @param point2 end point of the line
* @param color color of the line
*
* NOTE: The lv_canvas_draw_line function originates from https://github.com/jb55/bresenham-line.c.
*/
/*
* NOTE: The lv_canvas_draw_line function originates from https://github.com/jb55/bresenham-line.c.
*/
void lv_canvas_draw_line(lv_obj_t * canvas, lv_point_t point1, lv_point_t point2, lv_color_t color)
{
lv_coord_t x0, y0, x1, y1;
x0 = point1.x;
y0 = point1.y;
x1 = point2.x;
y1 = point2.y;
int dx = abs(x1-x0), sx = x0<x1 ? 1 : -1;
int dy = abs(y1-y0), sy = y0<y1 ? 1 : -1;
int err = (dx>dy ? dx : -dy)/2, e2;
for(;;){
lv_canvas_set_px(canvas, x0, y0, color);
if (x0==x1 && y0==y1) break;
e2 = err;
if (e2 >-dx) { err -= dy; x0 += sx; }
if (e2 < dy) { err += dx; y0 += sy; }
}
}
/**
* Draw triangle function of the canvas
* @param canvas pointer to a canvas object
* @param points edge points of the triangle
* @param color line color of the triangle
*/
void lv_canvas_draw_triangle(lv_obj_t * canvas, lv_point_t * points, lv_color_t color)
{
lv_canvas_draw_polygon(canvas, points, 3, color);
}
/**
* Draw rectangle function of the canvas
* @param canvas pointer to a canvas object
* @param points edge points of the rectangle
* @param color line color of the rectangle
*/
void lv_canvas_draw_rect(lv_obj_t * canvas, lv_point_t * points, lv_color_t color)
{
lv_canvas_draw_polygon(canvas, points, 4, color);
}
/**
* Draw polygon function of the canvas
* @param canvas pointer to a canvas object
* @param points edge points of the polygon
* @param size edge count of the polygon
* @param color line color of the polygon
*/
void lv_canvas_draw_polygon(lv_obj_t * canvas, lv_point_t * points, size_t size, lv_color_t color)
{
uint8_t i;
for(i=0; i < (size - 1); i++) {
lv_canvas_draw_line(canvas, points[i], points[i + 1], color);
}
lv_canvas_draw_line(canvas, points[size - 1], points[0], color);
}
/**
* Fill polygon function of the canvas
* @param canvas pointer to a canvas object
* @param points edge points of the polygon
* @param size edge count of the polygon
* @param boundary_color line color of the polygon
* @param fill_color fill color of the polygon
*/
void lv_canvas_fill_polygon(lv_obj_t * canvas, lv_point_t * points, size_t size, lv_color_t boundary_color, lv_color_t fill_color)
{
uint32_t x = 0, y = 0;
uint8_t i;
for(i=0; i<size; i++) {
x += points[i].x;
y += points[i].y;
}
x = x / size;
y = y / size;
lv_canvas_boundary_fill4(canvas, (lv_coord_t) x, (lv_coord_t) y, boundary_color, fill_color);
}
/**
* Boundary fill function of the canvas
* @param canvas pointer to a canvas object
* @param x x coordinate of the start position (seed)
* @param y y coordinate of the start position (seed)
* @param boundary_color edge/boundary color of the area
* @param fill_color fill color of the area
*/
void lv_canvas_boundary_fill4(lv_obj_t * canvas, lv_coord_t x, lv_coord_t y, lv_color_t boundary_color, lv_color_t fill_color)
{
lv_color_t c;
c = lv_canvas_get_px(canvas, x, y);
if(c.full != boundary_color.full &&
c.full != fill_color.full)
{
lv_canvas_set_px(canvas, x, y, fill_color);
lv_canvas_boundary_fill4(canvas, x + 1, y, boundary_color, fill_color);
lv_canvas_boundary_fill4(canvas, x, y + 1, boundary_color, fill_color);
lv_canvas_boundary_fill4(canvas, x - 1, y, boundary_color, fill_color);
lv_canvas_boundary_fill4(canvas, x, y - 1, boundary_color, fill_color);
}
}
/**
* Flood fill function of the canvas
* @param canvas pointer to a canvas object
* @param x x coordinate of the start position (seed)
* @param y y coordinate of the start position (seed)
* @param fill_color fill color of the area
* @param bg_color background color of the area
*/
void lv_canvas_flood_fill(lv_obj_t * canvas, lv_coord_t x, lv_coord_t y, lv_color_t fill_color, lv_color_t bg_color)
{
lv_color_t c;
c = lv_canvas_get_px(canvas, x, y);
if(c.full == bg_color.full)
{
lv_canvas_set_px(canvas, x, y, fill_color);
lv_canvas_flood_fill(canvas, x+1, y, fill_color, bg_color);
lv_canvas_flood_fill(canvas, x, y+1, fill_color, bg_color);
lv_canvas_flood_fill(canvas, x-1, y, fill_color, bg_color);
lv_canvas_flood_fill(canvas, x, y-1, fill_color, bg_color);
}
}
/**********************
* STATIC FUNCTIONS
**********************/
/**
* Signal function of the canvas
* @param canvas pointer to a canvas 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_canvas_signal(lv_obj_t * canvas, lv_signal_t sign, void * param)
{
lv_res_t res;
/* Include the ancient signal function */
res = ancestor_signal(canvas, sign, param);
if(res != LV_RES_OK) return res;
if(sign == LV_SIGNAL_CLEANUP) {
/*Nothing to cleanup. (No dynamically allocated memory in 'ext')*/
} 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_canvas";
}
return res;
}
#endif