diff options
| author | Brian <brian.paul@tungstengraphics.com> | 2008-02-04 13:16:10 -0700 |
|---|---|---|
| committer | Brian <brian.paul@tungstengraphics.com> | 2008-02-04 13:16:10 -0700 |
| commit | ca1d2fc5f6fb138025f6848591e3494e4b881930 (patch) | |
| tree | b71c5c91f93ee8d480a3fd47d53c116e1c110319 /src | |
| parent | 0a45f7594870cb7296100fb5f5d5dc82888a467d (diff) | |
Cell: improved bilinear filtering
avoid calling get_tex_tile() if all texels are in same tile
Diffstat (limited to 'src')
| -rw-r--r-- | src/mesa/pipe/cell/spu/spu_texture.c | 27 |
1 files changed, 19 insertions, 8 deletions
diff --git a/src/mesa/pipe/cell/spu/spu_texture.c b/src/mesa/pipe/cell/spu/spu_texture.c index 26a5eefc48..6e243f7fa3 100644 --- a/src/mesa/pipe/cell/spu/spu_texture.c +++ b/src/mesa/pipe/cell/spu/spu_texture.c @@ -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)]); |