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softgpu: Make texture lookups do less math.

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This commit is contained in:
Unknown W. Brackets 2013-12-08 22:37:45 -08:00
parent 2b10fbae1e
commit 30394df775
1 changed files with 13 additions and 12 deletions
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25
GPU/Software/Rasterizer.cpp
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@ -50,14 +50,15 @@ static inline int orient2dIncY(int dX01)
return -dX01;
}
static inline int GetPixelDataOffset(unsigned int texel_size_bits, unsigned int row_pitch_bits, unsigned int u, unsigned int v)
template <unsigned int texel_size_bits>
static inline int GetPixelDataOffset(unsigned int row_pitch_bits, unsigned int u, unsigned int v)
{
if (!gstate.isTextureSwizzled())
return v * row_pitch_bits *texel_size_bits/8 / 8 + u * texel_size_bits / 8;
int tile_size_bits = 32;
int tiles_in_block_horizontal = 4;
int tiles_in_block_vertical = 8;
const int tile_size_bits = 32;
const int tiles_in_block_horizontal = 4;
const int tiles_in_block_vertical = 8;
int texels_per_tile = tile_size_bits / texel_size_bits;
int tile_u = u / texels_per_tile;
@ -239,42 +240,42 @@ static inline u32 SampleNearest(int level, unsigned int u, unsigned int v, u8 *s
switch (texfmt) {
case GE_TFMT_4444:
srcptr += GetPixelDataOffset(16, texbufwidthbits, u, v);
srcptr += GetPixelDataOffset<16>(texbufwidthbits, u, v);
return DecodeRGBA4444(*(u16*)srcptr);
case GE_TFMT_5551:
srcptr += GetPixelDataOffset(16, texbufwidthbits, u, v);
srcptr += GetPixelDataOffset<16>(texbufwidthbits, u, v);
return DecodeRGBA5551(*(u16*)srcptr);
case GE_TFMT_5650:
srcptr += GetPixelDataOffset(16, texbufwidthbits, u, v);
srcptr += GetPixelDataOffset<16>(texbufwidthbits, u, v);
return DecodeRGB565(*(u16*)srcptr);
case GE_TFMT_8888:
srcptr += GetPixelDataOffset(32, texbufwidthbits, u, v);
srcptr += GetPixelDataOffset<32>(texbufwidthbits, u, v);
return DecodeRGBA8888(*(u32*)srcptr);
case GE_TFMT_CLUT32:
{
srcptr += GetPixelDataOffset(32, texbufwidthbits, u, v);
srcptr += GetPixelDataOffset<32>(texbufwidthbits, u, v);
u32 val = srcptr[0] + (srcptr[1] << 8) + (srcptr[2] << 16) + (srcptr[3] << 24);
return LookupColor(gstate.transformClutIndex(val), level);
}
case GE_TFMT_CLUT16:
{
srcptr += GetPixelDataOffset(16, texbufwidthbits, u, v);
srcptr += GetPixelDataOffset<16>(texbufwidthbits, u, v);
u16 val = srcptr[0] + (srcptr[1] << 8);
return LookupColor(gstate.transformClutIndex(val), level);
}
case GE_TFMT_CLUT8:
{
srcptr += GetPixelDataOffset(8, texbufwidthbits, u, v);
srcptr += GetPixelDataOffset<8>(texbufwidthbits, u, v);
u8 val = *srcptr;
return LookupColor(gstate.transformClutIndex(val), level);
}
case GE_TFMT_CLUT4:
{
srcptr += GetPixelDataOffset(4, texbufwidthbits, u, v);
srcptr += GetPixelDataOffset<4>(texbufwidthbits, u, v);
u8 val = (u & 1) ? (srcptr[0] >> 4) : (srcptr[0] & 0xF);
return LookupColor(gstate.transformClutIndex(val), level);
}