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Code Issues Releases Activity

Fix transparency checks that were broken for palette images with alpha

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This commit is contained in:
Ivan Savenko 2022-12-16 16:23:07 +02:00
parent 4d628a8ba1
commit 3403b42cd8
1 changed files with 4 additions and 7 deletions
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11
client/gui/SDL_Extensions.cpp
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@ -526,13 +526,10 @@ bool CSDL_Ext::isTransparent( SDL_Surface * srf, int x, int y )
SDL_GetRGBA(SDL_GetPixel(srf, x, y), srf->format, &color.r, &color.g, &color.b, &color.a);
// color is considered transparent here if
// a) image has aplha: less than 50% transparency
// b) no alpha: color is cyan
if (srf->format->Amask)
return color.a < 128; // almost transparent
else
return (color.r == 0 && color.g == 255 && color.b == 255);
bool pixelTransparent = color.a < 128;
bool pixelCyan = (color.r == 0 && color.g == 255 && color.b == 255);
return pixelTransparent || pixelCyan;
}
void CSDL_Ext::VflipSurf(SDL_Surface * surf)