From a4c7c8a6ee15d793d08e448f9ca8e2100bbe748c Mon Sep 17 00:00:00 2001 From: Brian Date: Thu, 31 Jan 2008 14:05:04 -0700 Subject: [PATCH] Fix problem in mapping vertex program outputs (found with "spring" game engine) If the vertex program writes to an output that's not consumed by the fragment program, map the vp output to an unused slot. --- src/mesa/state_tracker/st_atom_shader.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) diff --git a/src/mesa/state_tracker/st_atom_shader.c b/src/mesa/state_tracker/st_atom_shader.c index 1ed9333..9196918 100644 --- a/src/mesa/state_tracker/st_atom_shader.c +++ b/src/mesa/state_tracker/st_atom_shader.c @@ -226,9 +226,11 @@ find_translated_vp(struct st_context *st, GLint fpInAttrib = vp_out_to_fp_in(outAttr); if (fpInAttrib >= 0) { GLuint fpInSlot = stfp->input_to_slot[fpInAttrib]; - GLuint vpOutSlot = stfp->fs->state.input_map[fpInSlot]; - xvp->output_to_slot[outAttr] = vpOutSlot; - numVpOuts++; + if (fpInSlot != ~0) { + GLuint vpOutSlot = stfp->fs->state.input_map[fpInSlot]; + xvp->output_to_slot[outAttr] = vpOutSlot; + numVpOuts++; + } } else if (outAttr == VERT_RESULT_PSIZ || outAttr == VERT_RESULT_BFC0 || @@ -247,7 +249,7 @@ find_translated_vp(struct st_context *st, * We could use this info to do dead code elimination in the * vertex program. */ - dummySlot = stfp->num_input_slots; + dummySlot = numVpOuts; /* Map vert program outputs that aren't used to the dummy slot */ for (outAttr = 0; outAttr < VERT_RESULT_MAX; outAttr++) { -- 2.7.4