Module: Mesa Branch: master Commit: 24737f2298619844685e7deceaeb8dbfc2165ee3 URL: http://cgit.freedesktop.org/mesa/mesa/commit/?id=24737f2298619844685e7deceaeb8dbfc2165ee3
Author: Marek Olšák <[email protected]> Date: Sat Jan 2 23:08:27 2016 +0100 program: add a helper for rewriting FP position input to sysval Reviewed-by: Edward O'Callaghan <[email protected] Reviewed-by: Brian Paul <[email protected]> --- src/mesa/program/programopt.c | 27 +++++++++++++++++++++++++++ src/mesa/program/programopt.h | 2 ++ 2 files changed, 29 insertions(+) diff --git a/src/mesa/program/programopt.c b/src/mesa/program/programopt.c index af78150..24dde57 100644 --- a/src/mesa/program/programopt.c +++ b/src/mesa/program/programopt.c @@ -589,3 +589,30 @@ _mesa_remove_output_reads(struct gl_program *prog, gl_register_file type) } } } + +void +_mesa_program_fragment_position_to_sysval(struct gl_program *prog) +{ + GLuint i; + + if (prog->Target != GL_FRAGMENT_PROGRAM_ARB || + !(prog->InputsRead & BITFIELD64_BIT(VARYING_SLOT_POS))) + return; + + prog->InputsRead &= ~BITFIELD64_BIT(VARYING_SLOT_POS); + prog->SystemValuesRead |= 1 << SYSTEM_VALUE_FRAG_COORD; + + for (i = 0; i < prog->NumInstructions; i++) { + struct prog_instruction *inst = prog->Instructions + i; + const GLuint numSrc = _mesa_num_inst_src_regs(inst->Opcode); + GLuint j; + + for (j = 0; j < numSrc; j++) { + if (inst->SrcReg[j].File == PROGRAM_INPUT && + inst->SrcReg[j].Index == VARYING_SLOT_POS) { + inst->SrcReg[j].File = PROGRAM_SYSTEM_VALUE; + inst->SrcReg[j].Index = SYSTEM_VALUE_FRAG_COORD; + } + } + } +} diff --git a/src/mesa/program/programopt.h b/src/mesa/program/programopt.h index 757421e..1520d16 100644 --- a/src/mesa/program/programopt.h +++ b/src/mesa/program/programopt.h @@ -51,6 +51,8 @@ _mesa_count_texture_instructions(struct gl_program *prog); extern void _mesa_remove_output_reads(struct gl_program *prog, gl_register_file type); +extern void +_mesa_program_fragment_position_to_sysval(struct gl_program *prog); #ifdef __cplusplus } _______________________________________________ mesa-commit mailing list [email protected] http://lists.freedesktop.org/mailman/listinfo/mesa-commit
