diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/mesa/state_tracker/st_atom_shader.c | 53 |
1 files changed, 33 insertions, 20 deletions
diff --git a/src/mesa/state_tracker/st_atom_shader.c b/src/mesa/state_tracker/st_atom_shader.c index cb869c98a3d..ee649be885e 100644 --- a/src/mesa/state_tracker/st_atom_shader.c +++ b/src/mesa/state_tracker/st_atom_shader.c @@ -175,11 +175,12 @@ find_translated_vp(struct st_context *st, /* See if we need to translate vertex program to TGSI form */ if (xvp->serialNo != stvp->serialNo) { - GLuint outAttr, dummySlot; + GLuint outAttr; const GLbitfield outputsWritten = stvp->Base.Base.OutputsWritten; GLuint numVpOuts = 0; GLboolean emitPntSize = GL_FALSE, emitBFC0 = GL_FALSE, emitBFC1 = GL_FALSE; - GLint maxGeneric; + GLbitfield usedGenerics = 0x0; + GLbitfield usedOutputSlots = 0x0; /* Compute mapping of vertex program outputs to slots, which depends * on the fragment program's input->slot mapping. @@ -192,10 +193,12 @@ find_translated_vp(struct st_context *st, if (outAttr == VERT_RESULT_HPOS) { /* always put xformed position into slot zero */ - xvp->output_to_slot[VERT_RESULT_HPOS] = 0; + GLuint slot = 0; + xvp->output_to_slot[VERT_RESULT_HPOS] = slot; xvp->output_to_semantic_name[outAttr] = TGSI_SEMANTIC_POSITION; xvp->output_to_semantic_index[outAttr] = 0; numVpOuts++; + usedOutputSlots |= (1 << slot); } else if (outputsWritten & (1 << outAttr)) { /* see if the frag prog wants this vert output */ @@ -209,6 +212,12 @@ find_translated_vp(struct st_context *st, xvp->output_to_semantic_name[outAttr] = stfp->input_semantic_name[fpInSlot]; xvp->output_to_semantic_index[outAttr] = stfp->input_semantic_index[fpInSlot]; numVpOuts++; + usedOutputSlots |= (1 << vpOutSlot); + } + else { +#if 0 /*debug*/ + printf("VP output %d not used by FP\n", outAttr); +#endif } } else if (outAttr == VERT_RESULT_PSIZ) @@ -226,45 +235,49 @@ find_translated_vp(struct st_context *st, /* must do these last */ if (emitPntSize) { - xvp->output_to_slot[VERT_RESULT_PSIZ] = numVpOuts++; + GLuint slot = numVpOuts++; + xvp->output_to_slot[VERT_RESULT_PSIZ] = slot; xvp->output_to_semantic_name[VERT_RESULT_PSIZ] = TGSI_SEMANTIC_PSIZE; xvp->output_to_semantic_index[VERT_RESULT_PSIZ] = 0; + usedOutputSlots |= (1 << slot); } if (emitBFC0) { - xvp->output_to_slot[VERT_RESULT_BFC0] = numVpOuts++; + GLuint slot = numVpOuts++; + xvp->output_to_slot[VERT_RESULT_BFC0] = slot; xvp->output_to_semantic_name[VERT_RESULT_BFC0] = TGSI_SEMANTIC_COLOR; xvp->output_to_semantic_index[VERT_RESULT_BFC0] = 0; + usedOutputSlots |= (1 << slot); } if (emitBFC1) { - xvp->output_to_slot[VERT_RESULT_BFC1] = numVpOuts++; + GLuint slot = numVpOuts++; + xvp->output_to_slot[VERT_RESULT_BFC1] = slot; xvp->output_to_semantic_name[VERT_RESULT_BFC1] = TGSI_SEMANTIC_COLOR; xvp->output_to_semantic_index[VERT_RESULT_BFC1] = 1; + usedOutputSlots |= (1 << slot); } - /* Unneeded vertex program outputs will go to this slot. - * We could use this info to do dead code elimination in the - * vertex program. - */ - dummySlot = numVpOuts; - - /* find max GENERIC slot index */ - maxGeneric = -1; + /* build usedGenerics mask */ + usedGenerics = 0x0; for (outAttr = 0; outAttr < VERT_RESULT_MAX; outAttr++) { if (xvp->output_to_semantic_name[outAttr] == TGSI_SEMANTIC_GENERIC) { - maxGeneric = MAX2(maxGeneric, - xvp->output_to_semantic_index[outAttr]); + usedGenerics |= (1 << xvp->output_to_semantic_index[outAttr]); } } - /* Map vert program outputs that aren't used to the dummy slot - * (and an unused generic attribute slot). + /* For each vertex program output that doesn't match up to a fragment + * program input, map the vertex program output to a free slot and + * free generic attribute. */ for (outAttr = 0; outAttr < VERT_RESULT_MAX; outAttr++) { if (outputsWritten & (1 << outAttr)) { if (xvp->output_to_slot[outAttr] == UNUSED) { - xvp->output_to_slot[outAttr] = dummySlot; + GLint freeGeneric = _mesa_ffs(~usedGenerics) - 1; + GLint freeSlot = _mesa_ffs(~usedOutputSlots) - 1; + usedGenerics |= (1 << freeGeneric); + usedOutputSlots |= (1 << freeSlot); + xvp->output_to_slot[outAttr] = freeSlot; xvp->output_to_semantic_name[outAttr] = TGSI_SEMANTIC_GENERIC; - xvp->output_to_semantic_index[outAttr] = maxGeneric + 1; + xvp->output_to_semantic_index[outAttr] = freeGeneric; } } |