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Texture Handler: Fix incorrect alpha masking on 16-bit direct textures for AltiVec.

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rogerman
2025-07-24 17:41:21 -07:00
parent 40c035f986
commit ff7ad435d6
1 changed files with 2 additions and 2 deletions
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4
desmume/src/texcache.cpp
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@@ -1993,8 +1993,8 @@ void __NDSTextureUnpackDirect16Bit_AltiVec(const size_t texelCount, const u16 *_
const v128u16 alpha = vec_and(c, ((v128u16){0x0080,0x0080,0x0080,0x0080,0x0080,0x0080,0x0080,0x0080}));
const v128u16 alphaMask = vec_cmpeq( alpha, ((v128u16){0x0080,0x0080,0x0080,0x0080,0x0080,0x0080,0x0080,0x0080}) );
convertedColor[0] = vec_and( convertedColor[0], vec_perm((v128u8)alphaMask, (v128u8)alphaMask, ((v128u8){ 8, 9, 8, 9, 10,11, 10,11, 12,13, 12,13, 14,15, 14,15})) );
convertedColor[1] = vec_and( convertedColor[1], vec_perm((v128u8)alphaMask, (v128u8)alphaMask, ((v128u8){ 0, 1, 0, 1, 2, 3, 2, 3, 4, 5, 4, 5, 6, 7, 6, 7})) );
convertedColor[0] = vec_and( convertedColor[0], (v128u32)vec_mergeh(alphaMask, alphaMask) );
convertedColor[1] = vec_and( convertedColor[1], (v128u32)vec_mergel(alphaMask, alphaMask) );
vec_st(convertedColor[0], 0, dstBuffer);
vec_st(convertedColor[1], 16, dstBuffer);