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Cell: improved bilinear filtering

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avoid calling get_tex_tile() if all texels are in same tile
This commit is contained in:
Brian 2008-02-04 13:16:10 -07:00
parent 0a45f75948
commit ca1d2fc5f6
1 changed files with 19 additions and 8 deletions
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27
src/mesa/pipe/cell/spu/spu_texture.c
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@ -150,16 +150,17 @@ sample_texture_bilinear(vector float texcoord)
static const vector unsigned int offset01 = {0, 1, 0, 0};
vector float tc = spu_mul(texcoord, spu.tex_size);
/* itcST */
/* integer texcoords S,T: */
vector unsigned int itc00 = spu_convtu(tc, 0); /* convert to int */
vector unsigned int itc01 = spu_add(itc00, offset01);
vector unsigned int itc10 = spu_add(itc00, offset10);
vector unsigned int itc11 = spu_add(itc10, offset01);
itc00 = spu_and(itc00, spu.tex_size_mask); /* mask (GL_REPEAT) */
itc01 = spu_and(itc01, spu.tex_size_mask); /* mask (GL_REPEAT) */
itc10 = spu_and(itc10, spu.tex_size_mask); /* mask (GL_REPEAT) */
itc11 = spu_and(itc11, spu.tex_size_mask); /* mask (GL_REPEAT) */
/* mask (GL_REPEAT) */
itc00 = spu_and(itc00, spu.tex_size_mask);
itc01 = spu_and(itc01, spu.tex_size_mask);
itc10 = spu_and(itc10, spu.tex_size_mask);
itc11 = spu_and(itc11, spu.tex_size_mask);
/* intra tile addr */
vector unsigned int ij00 = spu_and(itc00, TILE_SIZE-1);
@ -167,11 +168,21 @@ sample_texture_bilinear(vector float texcoord)
vector unsigned int ij10 = spu_and(itc10, TILE_SIZE-1);
vector unsigned int ij11 = spu_and(itc11, TILE_SIZE-1);
/* get tile cache positions */
uint pos00 = get_tex_tile(itc00);
uint pos01 = get_tex_tile(itc01);
uint pos10 = get_tex_tile(itc10);
uint pos11 = get_tex_tile(itc11);
uint pos01, pos10, pos11;
if ((spu_extract(ij00, 0) < TILE_SIZE-1) &&
(spu_extract(ij00, 1) < TILE_SIZE-1)) {
/* all texels are in the same tile */
pos01 = pos10 = pos11 = pos00;
}
else {
pos01 = get_tex_tile(itc01);
pos10 = get_tex_tile(itc10);
pos11 = get_tex_tile(itc11);
}
/* get texels from tiles and convert to float[4] */
vector float texel00 = spu_unpack_color(tex_tiles[pos00].ui[spu_extract(ij00, 1)][spu_extract(ij00, 0)]);
vector float texel01 = spu_unpack_color(tex_tiles[pos01].ui[spu_extract(ij01, 1)][spu_extract(ij01, 0)]);
vector float texel10 = spu_unpack_color(tex_tiles[pos10].ui[spu_extract(ij10, 1)][spu_extract(ij10, 0)]);