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Properly incorperate Alpha in the color of the cursor

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loki 2019-12-14 16:25:11 +01:00
parent e539b159ee
commit 072fc00aca
1 changed files with 11 additions and 2 deletions
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13
sunshine/platform/linux.cpp
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@ -141,8 +141,17 @@ img_t snapshot(display_t &display_void) {
std::for_each(overlay_begin, overlay_end, [&](long pixel) {
int *pixel_p = (int*)&pixel;
if(pixel_p[0] != 0) {
*pixels_begin = pixel_p[0];
auto colors_in = (uint8_t*)pixels_begin;
auto alpha = (*(uint*)pixel_p) >> 24u;
if(alpha == 255) {
*pixels_begin = *pixel_p;
}
else {
auto colors_out = (uint8_t*)pixel_p;
colors_in[0] = colors_out[0] + (colors_in[0] * (255 - alpha) + 255/2) / 255;
colors_in[1] = colors_out[1] + (colors_in[1] * (255 - alpha) + 255/2) / 255;
colors_in[2] = colors_out[2] + (colors_in[2] * (255 - alpha) + 255/2) / 255;
}
++pixels_begin;
});