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fix some bugs with compressed texture look up (#2051)

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Jakly 2024-08-01 16:44:04 -04:00 committed by GitHub
parent 29c67f2140
commit d0a7239f15
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GPG Key ID: B5690EEEBB952194
1 changed files with 9 additions and 2 deletions
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9
src/GPU3D_Soft.cpp
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@ -242,13 +242,20 @@ void SoftRenderer::TextureLookup(const GPU& gpu, u32 texparam, u32 texpal, s16 s
{
vramaddr += ((t & 0x3FC) * (width>>2)) + (s & 0x3FC);
vramaddr += (t & 0x3);
vramaddr &= 0x7FFFF; // address used for all calcs wraps around after slot 3
u32 slot1addr = 0x20000 + ((vramaddr & 0x1FFFC) >> 1);
if (vramaddr >= 0x40000)
slot1addr += 0x10000;
u8 val = ReadVRAM_Texture<u8>(vramaddr, gpu);
u8 val;
if (vramaddr >= 0x20000 && vramaddr < 0x40000) // reading slot 1 for texels should always read 0
val = 0;
else
{
val = ReadVRAM_Texture<u8>(vramaddr, gpu);
val >>= (2 * (s & 0x3));
}
u16 palinfo = ReadVRAM_Texture<u16>(slot1addr, gpu);
u32 paloffset = (palinfo & 0x3FFF) << 2;