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cell: more comments, stub code for colormask/logicop/etc

This commit is contained in:
Brian Paul 2008-09-11 10:52:03 -06:00
parent 5c459b3925
commit 7ce1d0fb67
1 changed files with 70 additions and 37 deletions
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107
src/gallium/drivers/cell/spu/spu_per_fragment_op.c
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@ -37,6 +37,8 @@
#include "spu_per_fragment_op.h"
#define LINEAR_QUAD_LAYOUT 1
/**
* Called by rasterizer for each quad after the shader has run. Do
@ -177,27 +179,28 @@ spu_fallback_fragment_ops(uint x, uint y,
}
if (spu.blend.blend_enable) {
/* blending terms, misc regs */
vector float term1r, term1g, term1b, term1a;
vector float term2r, term2g, term2b, term2a;
vector float fbRGBA[4];
vector float one, tmp;
/* get colors from framebuffer */
vector float fbRGBA[4]; /* current framebuffer colors */
/* get colors from framebuffer/tile */
{
vector float fc[4];
uint c0, c1, c2, c3;
#if 0
c0 = colorTile->ui[y+0][x+0];
c1 = colorTile->ui[y+0][x+1];
c2 = colorTile->ui[y+1][x+0];
c3 = colorTile->ui[y+1][x+1];
#else
#if LINEAR_QUAD_LAYOUT /* See comments/diagram below */
c0 = colorTile->ui[y][x*2+0];
c1 = colorTile->ui[y][x*2+1];
c2 = colorTile->ui[y][x*2+2];
c3 = colorTile->ui[y][x*2+3];
#else
c0 = colorTile->ui[y+0][x+0];
c1 = colorTile->ui[y+0][x+1];
c2 = colorTile->ui[y+1][x+0];
c3 = colorTile->ui[y+1][x+1];
#endif
switch (spu.fb.color_format) {
case PIPE_FORMAT_B8G8R8A8_UNORM:
@ -360,18 +363,11 @@ spu_fallback_fragment_ops(uint x, uint y,
}
/* XXX do colormask test here */
if (spu_extract(spu_orx(mask), 0)) {
spu.cur_ctile_status = TILE_STATUS_DIRTY;
}
else {
return;
}
/* convert RRRR,GGGG,BBBB,AAAA to RGBA,RGBA,RGBA,RGBA */
/*
* Convert RRRR,GGGG,BBBB,AAAA to RGBA,RGBA,RGBA,RGBA.
*/
#if 0
/* original code */
{
vector float frag_soa[4];
frag_soa[0] = fragR;
@ -387,6 +383,9 @@ spu_fallback_fragment_ops(uint x, uint y,
(void) fragB;
#endif
/*
* Pack float colors into 32-bit RGBA words.
*/
switch (spu.fb.color_format) {
case PIPE_FORMAT_A8R8G8B8_UNORM:
c0 = spu_pack_A8R8G8B8(frag_aos[0]);
@ -406,7 +405,56 @@ spu_fallback_fragment_ops(uint x, uint y,
ASSERT(0);
}
#if 0
/*
* Color masking
*/
if (spu.blend.colormask != 0xf) {
/* XXX to do */
/* apply color mask to 32-bit packed colors */
}
/*
* Logic Ops
*/
if (spu.blend.logicop_enable) {
/* XXX to do */
/* apply logicop to 32-bit packed colors */
}
/*
* If mask is non-zero, mark tile as dirty.
*/
if (spu_extract(spu_orx(mask), 0)) {
spu.cur_ctile_status = TILE_STATUS_DIRTY;
}
else {
return;
}
/*
* Write new quad colors to the framebuffer/tile.
* Only write pixels where the corresponding mask word is set.
*/
#if LINEAR_QUAD_LAYOUT
/*
* Quad layout:
* +--+--+--+--+
* |p0|p1|p2|p3|
* +--+--+--+--+
*/
if (spu_extract(mask, 0))
colorTile->ui[y][x*2] = c0;
if (spu_extract(mask, 1))
colorTile->ui[y][x*2+1] = c1;
if (spu_extract(mask, 2))
colorTile->ui[y][x*2+2] = c2;
if (spu_extract(mask, 3))
colorTile->ui[y][x*2+3] = c3;
#else
/*
* Quad layout:
* +--+--+
@ -423,20 +471,5 @@ spu_fallback_fragment_ops(uint x, uint y,
colorTile->ui[y+1][x+0] = c2;
if (spu_extract(mask, 3))
colorTile->ui[y+1][x+1] = c3;
#else
/*
* Quad layout:
* +--+--+--+--+
* |p0|p1|p2|p3|
* +--+--+--+--+
*/
if (spu_extract(mask, 0))
colorTile->ui[y][x*2] = c0;
if (spu_extract(mask, 1))
colorTile->ui[y][x*2+1] = c1;
if (spu_extract(mask, 2))
colorTile->ui[y][x*2+2] = c2;
if (spu_extract(mask, 3))
colorTile->ui[y][x*2+3] = c3;
#endif
}