KonstantinSeurer
/
mesa
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

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>
This commit is contained in:
Marek Olšák 2016-01-02 23:08:27 +01:00
parent 4191c1a57c
commit 24737f2298
2 changed files with 29 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

27
src/mesa/program/programopt.c
View File

@ -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;
}
}
}
}

2
src/mesa/program/programopt.h
View File

@ -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
}