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DXT5: Fix decoding of alpha channel for textures with a non-mod-4 width.

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Henrik Rydgård 2023-12-15 10:27:24 +01:00
parent 4e47bab754
commit acbc9dc94f
1 changed files with 3 additions and 2 deletions
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5
GPU/Common/TextureDecoder.cpp
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@ -566,10 +566,11 @@ void DXTDecoder::WriteColorsDXT3(u32 *dst, const DXT3Block *src, int pitch, int
void DXTDecoder::WriteColorsDXT5(u32 *dst, const DXT5Block *src, int pitch, int width, int height) {
// 48 bits, 3 bit index per pixel, 12 bits per line.
u64 alphadata = ((u64)(u16)src->alphadata1 << 32) | (u32)src->alphadata2;
u64 allAlpha = ((u64)(u16)src->alphadata1 << 32) | (u32)src->alphadata2;
for (int y = 0; y < height; y++) {
int colordata = src->color.lines[y];
uint32_t colordata = src->color.lines[y];
uint32_t alphadata = allAlpha >> (12 * y);
for (int x = 0; x < width; x++) {
dst[x] = colors_[colordata & 3] | (alpha_[alphadata & 7] << 24);
colordata >>= 2;