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Video_Software: Implement proper RGBA8 texture loading from tmem.

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For RGBA8 textures, AR and GB tiles are stored in separate tmem banks. TextureDecoder did not support that previously.
This commit is contained in:
NeoBrainX
2013-01-09 10:19:18 +01:00
parent 7bf72a6c84
commit 304814e7cc
4 changed files with 85 additions and 19 deletions
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22
Source/Core/VideoCommon/Src/TextureDecoder.cpp
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@ -2515,6 +2515,28 @@ void TexDecoder_DecodeTexel(u8 *dst, const u8 *src, int s, int t, int imageWidth
}
}
void TexDecoder_DecodeTexelRGBA8FromTmem(u8 *dst, const u8 *src_ar, const u8* src_gb, int s, int t, int imageWidth)
{
u16 sBlk = s >> 2;
u16 tBlk = t >> 2;
u16 widthBlks = (imageWidth >> 2) + 1;
u32 base_ar = (tBlk * widthBlks + sBlk) << 4;
u32 base_gb = (tBlk * widthBlks + sBlk) << 4;
u16 blkS = s & 3;
u16 blkT = t & 3;
u32 blk_off = (blkT << 2) + blkS;
u32 offset_ar = (base_ar + blk_off) << 1;
u32 offset_gb = (base_gb + blk_off) << 1;
const u8* val_addr_ar = src_ar + offset_ar;
const u8* val_addr_gb = src_gb + offset_gb;
dst[3] = val_addr_ar[0]; // A
dst[0] = val_addr_ar[1]; // R
dst[1] = val_addr_gb[0]; // G
dst[2] = val_addr_gb[1]; // B
}
const char* texfmt[] = {
// pixel