diff options
| -rw-r--r-- | src/mesa/shader/program.c | 41 |
1 files changed, 36 insertions, 5 deletions
diff --git a/src/mesa/shader/program.c b/src/mesa/shader/program.c index b03dd24d112..723c46ee8cf 100644 --- a/src/mesa/shader/program.c +++ b/src/mesa/shader/program.c @@ -594,17 +594,47 @@ _mesa_combine_programs(GLcontext *ctx, if (newProg->Target == GL_FRAGMENT_PROGRAM_ARB) { struct gl_fragment_program *fprogA, *fprogB, *newFprog; + GLbitfield progB_inputsRead = progB->InputsRead; + GLint progB_colorFile, progB_colorIndex; + fprogA = (struct gl_fragment_program *) progA; fprogB = (struct gl_fragment_program *) progB; newFprog = (struct gl_fragment_program *) newProg; newFprog->UsesKill = fprogA->UsesKill || fprogB->UsesKill; + /* We'll do a search and replace for instances + * of progB_colorFile/progB_colorIndex below... + */ + progB_colorFile = PROGRAM_INPUT; + progB_colorIndex = FRAG_ATTRIB_COL0; + + /* + * The fragment program may get color from a state var rather than + * a fragment input (vertex output) if it's constant. + * See the texenvprogram.c code. + * So, search the program's parameter list now to see if the program + * gets color from a state var instead of a conventional fragment + * input register. + */ + for (i = 0; i < progB->Parameters->NumParameters; i++) { + struct gl_program_parameter *p = &progB->Parameters->Parameters[i]; + if (p->Type == PROGRAM_STATE_VAR && + p->StateIndexes[0] == STATE_INTERNAL && + p->StateIndexes[1] == STATE_CURRENT_ATTRIB && + p->StateIndexes[2] == VERT_ATTRIB_COLOR0) { + progB_inputsRead |= FRAG_BIT_COL0; + progB_colorFile = PROGRAM_STATE_VAR; + progB_colorIndex = i; + break; + } + } + /* Connect color outputs of fprogA to color inputs of fprogB, via a * new temporary register. */ if ((progA->OutputsWritten & (1 << FRAG_RESULT_COLR)) && - (progB->InputsRead & (1 << FRAG_ATTRIB_COL0))) { + (progB_inputsRead & FRAG_BIT_COL0)) { GLint tempReg = _mesa_find_free_register(newProg, PROGRAM_TEMPORARY); if (tempReg < 0) { _mesa_problem(ctx, "No free temp regs found in " @@ -615,13 +645,14 @@ _mesa_combine_programs(GLcontext *ctx, replace_registers(newInst, lenA, PROGRAM_OUTPUT, FRAG_RESULT_COLR, PROGRAM_TEMPORARY, tempReg); - /* replace reads from input.color[0] with tempReg */ + /* replace reads from the input color with tempReg */ replace_registers(newInst + lenA, lenB, - PROGRAM_INPUT, FRAG_ATTRIB_COL0, - PROGRAM_TEMPORARY, tempReg); + progB_colorFile, progB_colorIndex, /* search for */ + PROGRAM_TEMPORARY, tempReg /* replace with */ ); } - inputsB = progB->InputsRead; + /* compute combined program's InputsRead */ + inputsB = progB_inputsRead; if (progA->OutputsWritten & (1 << FRAG_RESULT_COLR)) { inputsB &= ~(1 << FRAG_ATTRIB_COL0); } |