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softpipe: fix incorrect blend func index passed to blend_quad()

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Need to pass the index indicating which blend terms to use, not which
color buffer we're blending into.

Rename the parameter to blend_quad() and add comments to be more clear
about this.
This commit is contained in:
Brian Paul 2010-07-02 09:53:48 -06:00
parent fbc6c316d2
commit 7a5a0b205e
1 changed files with 15 additions and 8 deletions
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23
src/gallium/drivers/softpipe/sp_quad_blend.c
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@ -221,11 +221,18 @@ logicop_quad(struct quad_stage *qs,
/**
* Do blending for a 2x2 quad for one color buffer.
* \param quadColor the incoming quad colors
* \param dest the destination/framebuffer quad colors
* \param blend_index which set of blending terms to use
* \param has_dst_alpha does the dest color buffer have an alpha channel?
*/
static void
blend_quad(struct quad_stage *qs,
float (*quadColor)[4],
float (*dest)[4],
unsigned cbuf,
unsigned blend_index,
boolean has_dst_alpha)
{
static const float zero[4] = { 0, 0, 0, 0 };
@ -236,7 +243,7 @@ blend_quad(struct quad_stage *qs,
/*
* Compute src/first term RGB
*/
switch (softpipe->blend->rt[cbuf].rgb_src_factor) {
switch (softpipe->blend->rt[blend_index].rgb_src_factor) {
case PIPE_BLENDFACTOR_ONE:
VEC4_COPY(source[0], quadColor[0]); /* R */
VEC4_COPY(source[1], quadColor[1]); /* G */
@ -401,7 +408,7 @@ blend_quad(struct quad_stage *qs,
/*
* Compute src/first term A
*/
switch (softpipe->blend->rt[cbuf].alpha_src_factor) {
switch (softpipe->blend->rt[blend_index].alpha_src_factor) {
case PIPE_BLENDFACTOR_ONE:
VEC4_COPY(source[3], quadColor[3]); /* A */
break;
@ -476,7 +483,7 @@ blend_quad(struct quad_stage *qs,
/*
* Compute dest/second term RGB
*/
switch (softpipe->blend->rt[cbuf].rgb_dst_factor) {
switch (softpipe->blend->rt[blend_index].rgb_dst_factor) {
case PIPE_BLENDFACTOR_ONE:
/* dest = dest * 1 NO-OP, leave dest as-is */
break;
@ -631,7 +638,7 @@ blend_quad(struct quad_stage *qs,
/*
* Compute dest/second term A
*/
switch (softpipe->blend->rt[cbuf].alpha_dst_factor) {
switch (softpipe->blend->rt[blend_index].alpha_dst_factor) {
case PIPE_BLENDFACTOR_ONE:
/* dest = dest * 1 NO-OP, leave dest as-is */
break;
@ -702,7 +709,7 @@ blend_quad(struct quad_stage *qs,
/*
* Combine RGB terms
*/
switch (softpipe->blend->rt[cbuf].rgb_func) {
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 */
@ -735,7 +742,7 @@ blend_quad(struct quad_stage *qs,
/*
* Combine A terms
*/
switch (softpipe->blend->rt[cbuf].alpha_func) {
switch (softpipe->blend->rt[blend_index].alpha_func) {
case PIPE_BLEND_ADD:
VEC4_ADD_SAT(quadColor[3], source[3], dest[3]); /* A */
break;
@ -822,7 +829,7 @@ blend_fallback(struct quad_stage *qs,
logicop_quad( qs, quadColor, dest );
}
else if (blend->rt[blend_buf].blend_enable) {
blend_quad( qs, quadColor, dest, cbuf, has_dst_alpha );
blend_quad( qs, quadColor, dest, blend_buf, has_dst_alpha );
}
if (blend->rt[blend_buf].colormask != 0xf)