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gallium/softpipe: Don't clobber dest color/alpha before masking.

Browse source 
The blend_quad function clobbers the actual render target color/alpha
values while applying the destination blend factor, which results in
restoring the wrong value during the masking stage for write-disabled
channels.

Reviewed-by: Brian Paul <brianp@vmware.com>
This commit is contained in:
Younes Manton 2011-07-21 20:10:34 -04:00
parent 6c8f1f483a
commit ac6455e9a2
1 changed files with 96 additions and 89 deletions
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185
src/gallium/drivers/softpipe/sp_quad_blend.c
View file

@ -240,6 +240,7 @@ blend_quad(struct quad_stage *qs,
static const float one[4] = { 1, 1, 1, 1 };
struct softpipe_context *softpipe = qs->softpipe;
float source[4][QUAD_SIZE] = { { 0 } };
float blend_dest[4][QUAD_SIZE];
/*
* Compute src/first term RGB
@ -480,79 +481,85 @@ blend_quad(struct quad_stage *qs,
assert(0 && "invalid alpha src factor");
}
/* Save the original dest for use in masking */
VEC4_COPY(blend_dest[0], dest[0]);
VEC4_COPY(blend_dest[1], dest[1]);
VEC4_COPY(blend_dest[2], dest[2]);
VEC4_COPY(blend_dest[3], dest[3]);
/*
* Compute dest/second term RGB
* Compute blend_dest/second term RGB
*/
switch (softpipe->blend->rt[blend_index].rgb_dst_factor) {
case PIPE_BLENDFACTOR_ONE:
/* dest = dest * 1 NO-OP, leave dest as-is */
/* blend_dest = blend_dest * 1 NO-OP, leave blend_dest as-is */
break;
case PIPE_BLENDFACTOR_SRC_COLOR:
VEC4_MUL(dest[0], dest[0], quadColor[0]); /* R */
VEC4_MUL(dest[1], dest[1], quadColor[1]); /* G */
VEC4_MUL(dest[2], dest[2], quadColor[2]); /* B */
VEC4_MUL(blend_dest[0], blend_dest[0], quadColor[0]); /* R */
VEC4_MUL(blend_dest[1], blend_dest[1], quadColor[1]); /* G */
VEC4_MUL(blend_dest[2], blend_dest[2], quadColor[2]); /* B */
break;
case PIPE_BLENDFACTOR_SRC_ALPHA:
VEC4_MUL(dest[0], dest[0], quadColor[3]); /* R * A */
VEC4_MUL(dest[1], dest[1], quadColor[3]); /* G * A */
VEC4_MUL(dest[2], dest[2], quadColor[3]); /* B * A */
VEC4_MUL(blend_dest[0], blend_dest[0], quadColor[3]); /* R * A */
VEC4_MUL(blend_dest[1], blend_dest[1], quadColor[3]); /* G * A */
VEC4_MUL(blend_dest[2], blend_dest[2], quadColor[3]); /* B * A */
break;
case PIPE_BLENDFACTOR_DST_ALPHA:
if (has_dst_alpha) {
VEC4_MUL(dest[0], dest[0], dest[3]); /* R * A */
VEC4_MUL(dest[1], dest[1], dest[3]); /* G * A */
VEC4_MUL(dest[2], dest[2], dest[3]); /* B * A */
VEC4_MUL(blend_dest[0], blend_dest[0], blend_dest[3]); /* R * A */
VEC4_MUL(blend_dest[1], blend_dest[1], blend_dest[3]); /* G * A */
VEC4_MUL(blend_dest[2], blend_dest[2], blend_dest[3]); /* B * A */
}
else {
/* dest = dest * 1 NO-OP, leave dest as-is */
/* blend_dest = blend_dest * 1 NO-OP, leave blend_dest as-is */
}
break;
case PIPE_BLENDFACTOR_DST_COLOR:
VEC4_MUL(dest[0], dest[0], dest[0]); /* R */
VEC4_MUL(dest[1], dest[1], dest[1]); /* G */
VEC4_MUL(dest[2], dest[2], dest[2]); /* B */
VEC4_MUL(blend_dest[0], blend_dest[0], blend_dest[0]); /* R */
VEC4_MUL(blend_dest[1], blend_dest[1], blend_dest[1]); /* G */
VEC4_MUL(blend_dest[2], blend_dest[2], blend_dest[2]); /* B */
break;
case PIPE_BLENDFACTOR_SRC_ALPHA_SATURATE:
if (has_dst_alpha) {
const float *alpha = quadColor[3];
float diff[4], temp[4];
VEC4_SUB(diff, one, dest[3]);
VEC4_SUB(diff, one, blend_dest[3]);
VEC4_MIN(temp, alpha, diff);
VEC4_MUL(dest[0], quadColor[0], temp); /* R */
VEC4_MUL(dest[1], quadColor[1], temp); /* G */
VEC4_MUL(dest[2], quadColor[2], temp); /* B */
VEC4_MUL(blend_dest[0], quadColor[0], temp); /* R */
VEC4_MUL(blend_dest[1], quadColor[1], temp); /* G */
VEC4_MUL(blend_dest[2], quadColor[2], temp); /* B */
}
else {
VEC4_COPY(dest[0], zero); /* R */
VEC4_COPY(dest[1], zero); /* G */
VEC4_COPY(dest[2], zero); /* B */
VEC4_COPY(blend_dest[0], zero); /* R */
VEC4_COPY(blend_dest[1], zero); /* G */
VEC4_COPY(blend_dest[2], zero); /* B */
}
break;
case PIPE_BLENDFACTOR_CONST_COLOR:
{
float comp[4];
VEC4_SCALAR(comp, softpipe->blend_color.color[0]); /* R */
VEC4_MUL(dest[0], dest[0], comp); /* R */
VEC4_MUL(blend_dest[0], blend_dest[0], comp); /* R */
VEC4_SCALAR(comp, softpipe->blend_color.color[1]); /* G */
VEC4_MUL(dest[1], dest[1], comp); /* G */
VEC4_MUL(blend_dest[1], blend_dest[1], comp); /* G */
VEC4_SCALAR(comp, softpipe->blend_color.color[2]); /* B */
VEC4_MUL(dest[2], dest[2], comp); /* B */
VEC4_MUL(blend_dest[2], blend_dest[2], comp); /* B */
}
break;
case PIPE_BLENDFACTOR_CONST_ALPHA:
{
float comp[4];
VEC4_SCALAR(comp, softpipe->blend_color.color[3]); /* A */
VEC4_MUL(dest[0], dest[0], comp); /* R */
VEC4_MUL(dest[1], dest[1], comp); /* G */
VEC4_MUL(dest[2], dest[2], comp); /* B */
VEC4_MUL(blend_dest[0], blend_dest[0], comp); /* R */
VEC4_MUL(blend_dest[1], blend_dest[1], comp); /* G */
VEC4_MUL(blend_dest[2], blend_dest[2], comp); /* B */
}
break;
case PIPE_BLENDFACTOR_ZERO:
VEC4_COPY(dest[0], zero); /* R */
VEC4_COPY(dest[1], zero); /* G */
VEC4_COPY(dest[2], zero); /* B */
VEC4_COPY(blend_dest[0], zero); /* R */
VEC4_COPY(blend_dest[1], zero); /* G */
VEC4_COPY(blend_dest[2], zero); /* B */
break;
case PIPE_BLENDFACTOR_SRC1_COLOR:
case PIPE_BLENDFACTOR_SRC1_ALPHA:
@ -563,45 +570,45 @@ blend_quad(struct quad_stage *qs,
{
float inv_comp[4];
VEC4_SUB(inv_comp, one, quadColor[0]); /* R */
VEC4_MUL(dest[0], inv_comp, dest[0]); /* R */
VEC4_MUL(blend_dest[0], inv_comp, blend_dest[0]); /* R */
VEC4_SUB(inv_comp, one, quadColor[1]); /* G */
VEC4_MUL(dest[1], inv_comp, dest[1]); /* G */
VEC4_MUL(blend_dest[1], inv_comp, blend_dest[1]); /* G */
VEC4_SUB(inv_comp, one, quadColor[2]); /* B */
VEC4_MUL(dest[2], inv_comp, dest[2]); /* B */
VEC4_MUL(blend_dest[2], inv_comp, blend_dest[2]); /* B */
}
break;
case PIPE_BLENDFACTOR_INV_SRC_ALPHA:
{
float one_minus_alpha[QUAD_SIZE];
VEC4_SUB(one_minus_alpha, one, quadColor[3]);
VEC4_MUL(dest[0], dest[0], one_minus_alpha); /* R */
VEC4_MUL(dest[1], dest[1], one_minus_alpha); /* G */
VEC4_MUL(dest[2], dest[2], one_minus_alpha); /* B */
VEC4_MUL(blend_dest[0], blend_dest[0], one_minus_alpha); /* R */
VEC4_MUL(blend_dest[1], blend_dest[1], one_minus_alpha); /* G */
VEC4_MUL(blend_dest[2], blend_dest[2], one_minus_alpha); /* B */
}
break;
case PIPE_BLENDFACTOR_INV_DST_ALPHA:
if (has_dst_alpha) {
float inv_comp[4];
VEC4_SUB(inv_comp, one, dest[3]); /* A */
VEC4_MUL(dest[0], inv_comp, dest[0]); /* R */
VEC4_MUL(dest[1], inv_comp, dest[1]); /* G */
VEC4_MUL(dest[2], inv_comp, dest[2]); /* B */
VEC4_SUB(inv_comp, one, blend_dest[3]); /* A */
VEC4_MUL(blend_dest[0], inv_comp, blend_dest[0]); /* R */
VEC4_MUL(blend_dest[1], inv_comp, blend_dest[1]); /* G */
VEC4_MUL(blend_dest[2], inv_comp, blend_dest[2]); /* B */
}
else {
VEC4_COPY(dest[0], zero); /* R */
VEC4_COPY(dest[1], zero); /* G */
VEC4_COPY(dest[2], zero); /* B */
VEC4_COPY(blend_dest[0], zero); /* R */
VEC4_COPY(blend_dest[1], zero); /* G */
VEC4_COPY(blend_dest[2], zero); /* B */
}
break;
case PIPE_BLENDFACTOR_INV_DST_COLOR:
{
float inv_comp[4];
VEC4_SUB(inv_comp, one, dest[0]); /* R */
VEC4_MUL(dest[0], dest[0], inv_comp); /* R */
VEC4_SUB(inv_comp, one, dest[1]); /* G */
VEC4_MUL(dest[1], dest[1], inv_comp); /* G */
VEC4_SUB(inv_comp, one, dest[2]); /* B */
VEC4_MUL(dest[2], dest[2], inv_comp); /* B */
VEC4_SUB(inv_comp, one, blend_dest[0]); /* R */
VEC4_MUL(blend_dest[0], blend_dest[0], inv_comp); /* R */
VEC4_SUB(inv_comp, one, blend_dest[1]); /* G */
VEC4_MUL(blend_dest[1], blend_dest[1], inv_comp); /* G */
VEC4_SUB(inv_comp, one, blend_dest[2]); /* B */
VEC4_MUL(blend_dest[2], blend_dest[2], inv_comp); /* B */
}
break;
case PIPE_BLENDFACTOR_INV_CONST_COLOR:
@ -609,22 +616,22 @@ blend_quad(struct quad_stage *qs,
float inv_comp[4];
/* R */
VEC4_SCALAR(inv_comp, 1.0f - softpipe->blend_color.color[0]);
VEC4_MUL(dest[0], dest[0], inv_comp);
VEC4_MUL(blend_dest[0], blend_dest[0], inv_comp);
/* G */
VEC4_SCALAR(inv_comp, 1.0f - softpipe->blend_color.color[1]);
VEC4_MUL(dest[1], dest[1], inv_comp);
VEC4_MUL(blend_dest[1], blend_dest[1], inv_comp);
/* B */
VEC4_SCALAR(inv_comp, 1.0f - softpipe->blend_color.color[2]);
VEC4_MUL(dest[2], dest[2], inv_comp);
VEC4_MUL(blend_dest[2], blend_dest[2], inv_comp);
}
break;
case PIPE_BLENDFACTOR_INV_CONST_ALPHA:
{
float inv_comp[4];
VEC4_SCALAR(inv_comp, 1.0f - softpipe->blend_color.color[3]);
VEC4_MUL(dest[0], dest[0], inv_comp);
VEC4_MUL(dest[1], dest[1], inv_comp);
VEC4_MUL(dest[2], dest[2], inv_comp);
VEC4_MUL(blend_dest[0], blend_dest[0], inv_comp);
VEC4_MUL(blend_dest[1], blend_dest[1], inv_comp);
VEC4_MUL(blend_dest[2], blend_dest[2], inv_comp);
}
break;
case PIPE_BLENDFACTOR_INV_SRC1_COLOR:
@ -637,29 +644,29 @@ blend_quad(struct quad_stage *qs,
}
/*
* Compute dest/second term A
* Compute blend_dest/second term A
*/
switch (softpipe->blend->rt[blend_index].alpha_dst_factor) {
case PIPE_BLENDFACTOR_ONE:
/* dest = dest * 1 NO-OP, leave dest as-is */
/* blend_dest = blend_dest * 1 NO-OP, leave blend_dest as-is */
break;
case PIPE_BLENDFACTOR_SRC_COLOR:
/* fall-through */
case PIPE_BLENDFACTOR_SRC_ALPHA:
VEC4_MUL(dest[3], dest[3], quadColor[3]); /* A * A */
VEC4_MUL(blend_dest[3], blend_dest[3], quadColor[3]); /* A * A */
break;
case PIPE_BLENDFACTOR_DST_COLOR:
/* fall-through */
case PIPE_BLENDFACTOR_DST_ALPHA:
if (has_dst_alpha) {
VEC4_MUL(dest[3], dest[3], dest[3]); /* A */
VEC4_MUL(blend_dest[3], blend_dest[3], blend_dest[3]); /* A */
}
else {
/* dest = dest * 1 NO-OP, leave dest as-is */
/* blend_dest = blend_dest * 1 NO-OP, leave blend_dest as-is */
}
break;
case PIPE_BLENDFACTOR_SRC_ALPHA_SATURATE:
/* dest = dest * 1 NO-OP, leave dest as-is */
/* blend_dest = blend_dest * 1 NO-OP, leave blend_dest as-is */
break;
case PIPE_BLENDFACTOR_CONST_COLOR:
/* fall-through */
@ -667,11 +674,11 @@ blend_quad(struct quad_stage *qs,
{
float comp[4];
VEC4_SCALAR(comp, softpipe->blend_color.color[3]); /* A */
VEC4_MUL(dest[3], dest[3], comp); /* A */
VEC4_MUL(blend_dest[3], blend_dest[3], comp); /* A */
}
break;
case PIPE_BLENDFACTOR_ZERO:
VEC4_COPY(dest[3], zero); /* A */
VEC4_COPY(blend_dest[3], zero); /* A */
break;
case PIPE_BLENDFACTOR_INV_SRC_COLOR:
/* fall-through */
@ -679,7 +686,7 @@ blend_quad(struct quad_stage *qs,
{
float one_minus_alpha[QUAD_SIZE];
VEC4_SUB(one_minus_alpha, one, quadColor[3]);
VEC4_MUL(dest[3], dest[3], one_minus_alpha); /* A */
VEC4_MUL(blend_dest[3], blend_dest[3], one_minus_alpha); /* A */
}
break;
case PIPE_BLENDFACTOR_INV_DST_COLOR:
@ -687,11 +694,11 @@ blend_quad(struct quad_stage *qs,
case PIPE_BLENDFACTOR_INV_DST_ALPHA:
if (has_dst_alpha) {
float inv_comp[4];
VEC4_SUB(inv_comp, one, dest[3]); /* A */
VEC4_MUL(dest[3], inv_comp, dest[3]); /* A */
VEC4_SUB(inv_comp, one, blend_dest[3]); /* A */
VEC4_MUL(blend_dest[3], inv_comp, blend_dest[3]); /* A */
}
else {
VEC4_COPY(dest[3], zero); /* A */
VEC4_COPY(blend_dest[3], zero); /* A */
}
break;
case PIPE_BLENDFACTOR_INV_CONST_COLOR:
@ -700,7 +707,7 @@ blend_quad(struct quad_stage *qs,
{
float inv_comp[4];
VEC4_SCALAR(inv_comp, 1.0f - softpipe->blend_color.color[3]);
VEC4_MUL(dest[3], dest[3], inv_comp);
VEC4_MUL(blend_dest[3], blend_dest[3], inv_comp);
}
break;
default:
@ -712,29 +719,29 @@ blend_quad(struct quad_stage *qs,
*/
switch (softpipe->blend->rt[blend_index].rgb_func) {
case PIPE_BLEND_ADD:
VEC4_ADD_SAT(quadColor[0], source[0], dest[0]); /* R */
VEC4_ADD_SAT(quadColor[1], source[1], dest[1]); /* G */
VEC4_ADD_SAT(quadColor[2], source[2], dest[2]); /* B */
VEC4_ADD_SAT(quadColor[0], source[0], blend_dest[0]); /* R */
VEC4_ADD_SAT(quadColor[1], source[1], blend_dest[1]); /* G */
VEC4_ADD_SAT(quadColor[2], source[2], blend_dest[2]); /* B */
break;
case PIPE_BLEND_SUBTRACT:
VEC4_SUB_SAT(quadColor[0], source[0], dest[0]); /* R */
VEC4_SUB_SAT(quadColor[1], source[1], dest[1]); /* G */
VEC4_SUB_SAT(quadColor[2], source[2], dest[2]); /* B */
VEC4_SUB_SAT(quadColor[0], source[0], blend_dest[0]); /* R */
VEC4_SUB_SAT(quadColor[1], source[1], blend_dest[1]); /* G */
VEC4_SUB_SAT(quadColor[2], source[2], blend_dest[2]); /* B */
break;
case PIPE_BLEND_REVERSE_SUBTRACT:
VEC4_SUB_SAT(quadColor[0], dest[0], source[0]); /* R */
VEC4_SUB_SAT(quadColor[1], dest[1], source[1]); /* G */
VEC4_SUB_SAT(quadColor[2], dest[2], source[2]); /* B */
VEC4_SUB_SAT(quadColor[0], blend_dest[0], source[0]); /* R */
VEC4_SUB_SAT(quadColor[1], blend_dest[1], source[1]); /* G */
VEC4_SUB_SAT(quadColor[2], blend_dest[2], source[2]); /* B */
break;
case PIPE_BLEND_MIN:
VEC4_MIN(quadColor[0], source[0], dest[0]); /* R */
VEC4_MIN(quadColor[1], source[1], dest[1]); /* G */
VEC4_MIN(quadColor[2], source[2], dest[2]); /* B */
VEC4_MIN(quadColor[0], source[0], blend_dest[0]); /* R */
VEC4_MIN(quadColor[1], source[1], blend_dest[1]); /* G */
VEC4_MIN(quadColor[2], source[2], blend_dest[2]); /* B */
break;
case PIPE_BLEND_MAX:
VEC4_MAX(quadColor[0], source[0], dest[0]); /* R */
VEC4_MAX(quadColor[1], source[1], dest[1]); /* G */
VEC4_MAX(quadColor[2], source[2], dest[2]); /* B */
VEC4_MAX(quadColor[0], source[0], blend_dest[0]); /* R */
VEC4_MAX(quadColor[1], source[1], blend_dest[1]); /* G */
VEC4_MAX(quadColor[2], source[2], blend_dest[2]); /* B */
break;
default:
assert(0 && "invalid rgb blend func");
@ -745,19 +752,19 @@ blend_quad(struct quad_stage *qs,
*/
switch (softpipe->blend->rt[blend_index].alpha_func) {
case PIPE_BLEND_ADD:
VEC4_ADD_SAT(quadColor[3], source[3], dest[3]); /* A */
VEC4_ADD_SAT(quadColor[3], source[3], blend_dest[3]); /* A */
break;
case PIPE_BLEND_SUBTRACT:
VEC4_SUB_SAT(quadColor[3], source[3], dest[3]); /* A */
VEC4_SUB_SAT(quadColor[3], source[3], blend_dest[3]); /* A */
break;
case PIPE_BLEND_REVERSE_SUBTRACT:
VEC4_SUB_SAT(quadColor[3], dest[3], source[3]); /* A */
VEC4_SUB_SAT(quadColor[3], blend_dest[3], source[3]); /* A */
break;
case PIPE_BLEND_MIN:
VEC4_MIN(quadColor[3], source[3], dest[3]); /* A */
VEC4_MIN(quadColor[3], source[3], blend_dest[3]); /* A */
break;
case PIPE_BLEND_MAX:
VEC4_MAX(quadColor[3], source[3], dest[3]); /* A */
VEC4_MAX(quadColor[3], source[3], blend_dest[3]); /* A */
break;
default:
assert(0 && "invalid alpha blend func");