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Fixed crash blitting to an 8-bit surface with no palette

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This commit is contained in:
Sam Lantinga
2025-11-10 13:03:00 -08:00
parent 6389f4db4c
commit ff890d1733
1 changed files with 12 additions and 10 deletions
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22
src/video/SDL_pixels.c
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@@ -1217,16 +1217,18 @@ static Uint8 SDL_FindColor(const SDL_Palette *pal, Uint8 r, Uint8 g, Uint8 b, Ui
Uint8 SDL_LookupRGBAColor(SDL_HashTable *palette_map, Uint32 pixelvalue, const SDL_Palette *pal)
{
Uint8 color_index = 0;
const void *value;
if (SDL_FindInHashTable(palette_map, (const void *)(uintptr_t)pixelvalue, &value)) {
color_index = (Uint8)(uintptr_t)value;
} else {
Uint8 r = (Uint8)((pixelvalue >> 24) & 0xFF);
Uint8 g = (Uint8)((pixelvalue >> 16) & 0xFF);
Uint8 b = (Uint8)((pixelvalue >> 8) & 0xFF);
Uint8 a = (Uint8)((pixelvalue >> 0) & 0xFF);
color_index = SDL_FindColor(pal, r, g, b, a);
SDL_InsertIntoHashTable(palette_map, (const void *)(uintptr_t)pixelvalue, (const void *)(uintptr_t)color_index, true);
if (pal) {
const void *value;
if (SDL_FindInHashTable(palette_map, (const void *)(uintptr_t)pixelvalue, &value)) {
color_index = (Uint8)(uintptr_t)value;
} else {
Uint8 r = (Uint8)((pixelvalue >> 24) & 0xFF);
Uint8 g = (Uint8)((pixelvalue >> 16) & 0xFF);
Uint8 b = (Uint8)((pixelvalue >> 8) & 0xFF);
Uint8 a = (Uint8)((pixelvalue >> 0) & 0xFF);
color_index = SDL_FindColor(pal, r, g, b, a);
SDL_InsertIntoHashTable(palette_map, (const void *)(uintptr_t)pixelvalue, (const void *)(uintptr_t)color_index, true);
}
}
return color_index;
}