summaryrefslogtreecommitdiff
path: root/src/gallium
diff options
context:
space:
mode:
authorBrian Paul <brian.paul@tungstengraphics.com>2008-09-11 10:52:03 -0600
committerBrian Paul <brian.paul@tungstengraphics.com>2008-09-11 10:52:03 -0600
commit7ce1d0fb6700fd4998a095de2c9edf5ed920464c (patch)
tree77fa694b88912e240647ac9426fb95f87991c230 /src/gallium
parent5c459b392562d98f98efefe64ee2f531235c2ad4 (diff)
cell: more comments, stub code for colormask/logicop/etc
Diffstat (limited to 'src/gallium')
-rw-r--r--src/gallium/drivers/cell/spu/spu_per_fragment_op.c107
1 files changed, 70 insertions, 37 deletions
diff --git a/src/gallium/drivers/cell/spu/spu_per_fragment_op.c b/src/gallium/drivers/cell/spu/spu_per_fragment_op.c
index 3f0eabaa05..03dd547845 100644
--- a/src/gallium/drivers/cell/spu/spu_per_fragment_op.c
+++ b/src/gallium/drivers/cell/spu/spu_per_fragment_op.c
@@ -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]);
@@ -406,24 +405,41 @@ spu_fallback_fragment_ops(uint x, uint y,
ASSERT(0);
}
-#if 0
+
/*
- * Quad layout:
- * +--+--+
- * |p0|p1|
- * +--+--+
- * |p2|p3|
- * +--+--+
+ * Color masking
*/
- if (spu_extract(mask, 0))
- colorTile->ui[y+0][x+0] = c0;
- if (spu_extract(mask, 1))
- colorTile->ui[y+0][x+1] = c1;
- if (spu_extract(mask, 2))
- colorTile->ui[y+1][x+0] = c2;
- if (spu_extract(mask, 3))
- colorTile->ui[y+1][x+1] = c3;
-#else
+ 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:
* +--+--+--+--+
@@ -438,5 +454,22 @@ spu_fallback_fragment_ops(uint x, uint y,
colorTile->ui[y][x*2+2] = c2;
if (spu_extract(mask, 3))
colorTile->ui[y][x*2+3] = c3;
+#else
+ /*
+ * Quad layout:
+ * +--+--+
+ * |p0|p1|
+ * +--+--+
+ * |p2|p3|
+ * +--+--+
+ */
+ if (spu_extract(mask, 0))
+ colorTile->ui[y+0][x+0] = c0;
+ if (spu_extract(mask, 1))
+ colorTile->ui[y+0][x+1] = c1;
+ if (spu_extract(mask, 2))
+ colorTile->ui[y+1][x+0] = c2;
+ if (spu_extract(mask, 3))
+ colorTile->ui[y+1][x+1] = c3;
#endif
}