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| author | Brian Paul <brian.paul@tungstengraphics.com> | 2008-09-08 11:50:13 -0600 |
|---|---|---|
| committer | Brian Paul <brian.paul@tungstengraphics.com> | 2008-09-11 10:39:28 -0600 |
| commit | cd9722dcddcb41af3196860280d23542dc673700 (patch) | |
| tree | d4b9da1376c482492b06ae4927f66060719c46a1 /src/gallium | |
| parent | 0e79e474de164a765b9759398c83b6bfa16a0012 (diff) | |
cell: comments
Diffstat (limited to 'src/gallium')
| -rw-r--r-- | src/gallium/drivers/cell/spu/spu_tri.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/src/gallium/drivers/cell/spu/spu_tri.c b/src/gallium/drivers/cell/spu/spu_tri.c index 2a4e0b423c..a3ea0a3e69 100644 --- a/src/gallium/drivers/cell/spu/spu_tri.c +++ b/src/gallium/drivers/cell/spu/spu_tri.c @@ -209,7 +209,7 @@ clip_emit_quad(struct setup_stage *setup) /** * Evaluate attribute coefficients (plane equations) to compute * attribute values for the four fragments in a quad. - * Eg: four colors will be compute. + * Eg: four colors will be computed (in AoS format). */ static INLINE void eval_coeff(uint slot, float x, float y, vector float result[4]) @@ -356,6 +356,7 @@ emit_quad( int x, int y, mask_t mask ) /* Convert fragment data from AoS to SoA format. + * I.e. (RGBA,RGBA,RGBA,RGBA) -> (RRRR,GGGG,BBBB,AAAA) */ qword soa_frag[4]; _transpose_matrix4x4((vec_float4 *) soa_frag, colors); @@ -373,6 +374,7 @@ emit_quad( int x, int y, mask_t mask ) if (spu.read_fb) { /* Convert pixel data from AoS to SoA format. + * I.e. (RGBA,RGBA,RGBA,RGBA) -> (RRRR,GGGG,BBBB,AAAA) */ vec_float4 aos_pix[4] = { spu_unpack_A8R8G8B8(spu.ctile.ui[iy+0][ix+0]), @@ -393,6 +395,7 @@ emit_quad( int x, int y, mask_t mask ) /* Convert final pixel data from SoA to AoS format. + * I.e. (RRRR,GGGG,BBBB,AAAA) -> (RGBA,RGBA,RGBA,RGBA) */ result = (*spu.logicop)(pix[0], pix[1], pix[2], pix[3], result.r, result.g, result.b, result.a, |