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add lv_canvas_mult_buf

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This commit is contained in:
Gabor Kiss-Vamosi
2019-01-17 16:23:50 +01:00
parent 87e262f27a
commit 7b193a40ef
2 changed files with 75 additions and 24 deletions
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86
lv_objx/lv_canvas.c
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@@ -123,26 +123,66 @@ void lv_canvas_set_px(lv_obj_t * canvas, lv_coord_t x, lv_coord_t y, lv_color_t
* @param x left side of the destination position
* @param y top side of the destination position
*/
void lv_canvas_copy_to_buf(lv_obj_t * canvas, void * to_copy, lv_coord_t w, lv_coord_t h, lv_coord_t x, lv_coord_t y)
void lv_canvas_copy_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_copy_to_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(&ext->dsc.data[px], to_copy8, w * px_size);
px += ext->dsc.header.w * px_size;
to_copy8 += w * px_size;
}
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(&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++) {
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;
}
copy_buf_color += w;
canvas_buf_color += ext->dsc.header.w;
}
}
/*=====================
* Setter functions
*====================*/
@@ -183,9 +223,9 @@ void lv_canvas_set_buffer(lv_obj_t * canvas, void * buf, lv_coord_t w, lv_coord_
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;
case LV_CANVAS_STYLE_MAIN:
lv_img_set_style(canvas, style);
break;
}
}
@@ -205,11 +245,11 @@ lv_style_t * lv_canvas_get_style(const lv_obj_t * canvas, lv_canvas_style_t type
lv_style_t * style = NULL;
switch(type) {
case LV_CANVAS_STYLE_MAIN:
style = lv_img_get_style(canvas);
break;
default:
style = NULL;
case LV_CANVAS_STYLE_MAIN:
style = lv_img_get_style(canvas);
break;
default:
style = NULL;
}
return style;