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PicoVector: Fix bug in RGB888 blend. 

Move the source pen out for a tiny performance boost.
pull/1019/head
Phil Howard 2025-04-25 17:55:28 +01:00
rodzic 7a894dc512
commit 8117066bb5
1 zmienionych plików z 7 dodań i 6 usunięć
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libraries/pico_graphics/pico_graphics_pen_rgb888.cpp
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@ -37,11 +37,16 @@ namespace pimoroni {
} }
} }
bool PicoGraphics_PenRGB888::render_tile(const Tile *tile) { bool PicoGraphics_PenRGB888::render_tile(const Tile *tile) {
// Unpack our pen colour
uint32_t sr = (color >> 16) & 0xff;
uint32_t sg = (color >> 8) & 0xff;
uint32_t sb = (color >> 0) & 0xff;
for(int y = 0; y < tile->h; y++) { for(int y = 0; y < tile->h; y++) {
uint8_t *p_alpha = &tile->data[(y * tile->stride)]; uint8_t *p_alpha = &tile->data[(y * tile->stride)];
uint32_t *p_dest = &((uint32_t *)frame_buffer)[tile->x + ((tile->y + y) * bounds.w)]; uint32_t *p_dest = &((uint32_t *)frame_buffer)[tile->x + ((tile->y + y) * bounds.w)];
for(int x = 0; x < tile->w; x++) { for(int x = 0; x < tile->w; x++) {
uint16_t dest = *p_dest; uint32_t dest = *p_dest;
uint8_t alpha = *p_alpha; uint8_t alpha = *p_alpha;
// TODO: Alpha blending // TODO: Alpha blending
@ -49,11 +54,7 @@ namespace pimoroni {
*p_dest = color; *p_dest = color;
}else if(alpha == 0) { }else if(alpha == 0) {
} else { } else {
// blend tha pixel // blend the pixel
uint32_t sr = (color >> 16) & 0xff;
uint32_t sg = (color >> 8) & 0xff;
uint32_t sb = (color >> 0) & 0xff;
uint32_t dr = (dest >> 16) & 0xff; uint32_t dr = (dest >> 16) & 0xff;
uint32_t dg = (dest >> 8) & 0xff; uint32_t dg = (dest >> 8) & 0xff;
uint32_t db = (dest >> 0) & 0xff; uint32_t db = (dest >> 0) & 0xff;