diff options
| author | Marek Olšák <marek.olsak@amd.com> | 2016-01-02 23:08:27 +0100 |
|---|---|---|
| committer | Marek Olšák <marek.olsak@amd.com> | 2016-01-08 20:06:23 +0100 |
| commit | 24737f2298619844685e7deceaeb8dbfc2165ee3 (patch) | |
| tree | f2998914715aca7474127cef7c21cc8b24fdd41d | |
| parent | 4191c1a57c1e806a078bfc5b074b557ff2b54c35 (diff) | |
program: add a helper for rewriting FP position input to sysval
Reviewed-by: Edward O'Callaghan <eocallaghan@alterapraxis.com
Reviewed-by: Brian Paul <brianp@vmware.com>
| -rw-r--r-- | src/mesa/program/programopt.c | 27 | ||||
| -rw-r--r-- | src/mesa/program/programopt.h | 2 |
2 files changed, 29 insertions, 0 deletions
diff --git a/src/mesa/program/programopt.c b/src/mesa/program/programopt.c index af78150d59..24dde57725 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 757421edfe..1520d161ea 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 } |