diff options
author | Brian Paul <brianp@vmware.com> | 2009-03-20 20:25:34 -0600 |
---|---|---|
committer | Brian Paul <brianp@vmware.com> | 2009-03-20 20:29:07 -0600 |
commit | 401cbd0d2365e5b2d371a2a01edf1cecca4a99dd (patch) | |
tree | 1db298c9d76bd4bad0831cdabf12b635e2941903 /src/mesa/state_tracker/st_mesa_to_tgsi.c | |
parent | 1f45ae0813f72fa92f52e0ebc440922362dc7cce (diff) |
gallium: remove use of origin_lower_left
This was used to indicate OpenGL's lower-left origin for fragment window
coordinates for polygon stipple and gl_FragCoord.
Now:
- fragment coordinate origin is always upper-left corner
- GL polygon stipple is inverted and shifted before given to gallium
- GL fragment programs that use INPUT[WPOS] are modified to use an
inverted window coord which is placed in a temp register.
Note: the origin_lower_left field still exists in pipe_rasterizer_state.
Remove it when all the drivers, etc. no longer reference it.
Diffstat (limited to 'src/mesa/state_tracker/st_mesa_to_tgsi.c')
-rw-r--r-- | src/mesa/state_tracker/st_mesa_to_tgsi.c | 179 |
1 files changed, 161 insertions, 18 deletions
diff --git a/src/mesa/state_tracker/st_mesa_to_tgsi.c b/src/mesa/state_tracker/st_mesa_to_tgsi.c index cbf3f334c0..ffa607dd87 100644 --- a/src/mesa/state_tracker/st_mesa_to_tgsi.c +++ b/src/mesa/state_tracker/st_mesa_to_tgsi.c @@ -219,8 +219,9 @@ compile_instruction( const GLuint immediateMapping[], GLboolean indirectAccess, GLuint preamble_size, - GLuint processor, - GLboolean *insideSubroutine) + GLuint procType, + GLboolean *insideSubroutine, + GLint wposTemp) { GLuint i; struct tgsi_full_dst_register *fulldst; @@ -247,19 +248,29 @@ compile_instruction( GLuint j; fullsrc = &fullinst->FullSrcRegisters[i]; - fullsrc->SrcRegister.File = map_register_file( - inst->SrcReg[i].File, - inst->SrcReg[i].Index, - immediateMapping, - indirectAccess ); - fullsrc->SrcRegister.Index = map_register_file_index( - fullsrc->SrcRegister.File, - inst->SrcReg[i].Index, - inputMapping, - outputMapping, - immediateMapping, - indirectAccess ); + if (procType == TGSI_PROCESSOR_FRAGMENT && + inst->SrcReg[i].File == PROGRAM_INPUT && + inst->SrcReg[i].Index == FRAG_ATTRIB_WPOS) { + /* special case of INPUT[WPOS] */ + fullsrc->SrcRegister.File = TGSI_FILE_TEMPORARY; + fullsrc->SrcRegister.Index = wposTemp; + } + else { + /* any other src register */ + fullsrc->SrcRegister.File = map_register_file( + inst->SrcReg[i].File, + inst->SrcReg[i].Index, + immediateMapping, + indirectAccess ); + fullsrc->SrcRegister.Index = map_register_file_index( + fullsrc->SrcRegister.File, + inst->SrcReg[i].Index, + inputMapping, + outputMapping, + immediateMapping, + indirectAccess ); + } /* swizzle (ext swizzle also depends on negation) */ { @@ -733,6 +744,111 @@ find_temporaries(const struct gl_program *program, } +/** + * Find an unused temporary in the tempsUsed array. + */ +static int +find_free_temporary(GLboolean tempsUsed[MAX_PROGRAM_TEMPS]) +{ + int i; + for (i = 0; i < MAX_PROGRAM_TEMPS; i++) { + if (!tempsUsed[i]) { + tempsUsed[i] = GL_TRUE; + return i; + } + } + return -1; +} + + +/** helper for building simple TGSI instruction, one src register */ +static void +build_tgsi_instruction1(struct tgsi_full_instruction *inst, + int opcode, + int dstFile, int dstIndex, int writemask, + int srcFile1, int srcIndex1) +{ + *inst = tgsi_default_full_instruction(); + + inst->Instruction.Opcode = opcode; + + inst->Instruction.NumDstRegs = 1; + inst->FullDstRegisters[0].DstRegister.File = dstFile; + inst->FullDstRegisters[0].DstRegister.Index = dstIndex; + inst->FullDstRegisters[0].DstRegister.WriteMask = writemask; + + inst->Instruction.NumSrcRegs = 1; + inst->FullSrcRegisters[0].SrcRegister.File = srcFile1; + inst->FullSrcRegisters[0].SrcRegister.Index = srcIndex1; +} + + +/** helper for building simple TGSI instruction, two src registers */ +static void +build_tgsi_instruction2(struct tgsi_full_instruction *inst, + int opcode, + int dstFile, int dstIndex, int writemask, + int srcFile1, int srcIndex1, + int srcFile2, int srcIndex2) +{ + *inst = tgsi_default_full_instruction(); + + inst->Instruction.Opcode = opcode; + + inst->Instruction.NumDstRegs = 1; + inst->FullDstRegisters[0].DstRegister.File = dstFile; + inst->FullDstRegisters[0].DstRegister.Index = dstIndex; + inst->FullDstRegisters[0].DstRegister.WriteMask = writemask; + + inst->Instruction.NumSrcRegs = 2; + inst->FullSrcRegisters[0].SrcRegister.File = srcFile1; + inst->FullSrcRegisters[0].SrcRegister.Index = srcIndex1; + inst->FullSrcRegisters[1].SrcRegister.File = srcFile2; + inst->FullSrcRegisters[1].SrcRegister.Index = srcIndex2; +} + + + +/** + * Emit the TGSI instructions for inverting the WPOS y coordinate. + */ +static int +emit_inverted_wpos(struct tgsi_token *tokens, + int wpos_temp, + int winsize_const, + int wpos_input, + struct tgsi_header *header, int maxTokens) +{ + struct tgsi_full_instruction fullinst; + int ti = 0; + + /* MOV wpos_temp.xzw, input[wpos]; */ + build_tgsi_instruction1(&fullinst, + TGSI_OPCODE_MOV, + TGSI_FILE_TEMPORARY, wpos_temp, WRITEMASK_XZW, + TGSI_FILE_INPUT, 0); + + ti += tgsi_build_full_instruction(&fullinst, + &tokens[ti], + header, + maxTokens - ti); + + /* SUB wpos_temp.y, const[winsize_const] - input[wpos_input]; */ + build_tgsi_instruction2(&fullinst, + TGSI_OPCODE_SUB, + TGSI_FILE_TEMPORARY, wpos_temp, WRITEMASK_Y, + TGSI_FILE_CONSTANT, winsize_const, + TGSI_FILE_INPUT, wpos_input); + + ti += tgsi_build_full_instruction(&fullinst, + &tokens[ti], + header, + maxTokens - ti); + + return ti; +} + + /** @@ -778,16 +894,34 @@ st_translate_mesa_program( GLuint ti; /* token index */ struct tgsi_header *header; struct tgsi_processor *processor; - struct tgsi_full_instruction fullinst; GLuint preamble_size = 0; GLuint immediates[1000]; GLuint numImmediates = 0; GLboolean insideSubroutine = GL_FALSE; GLboolean indirectAccess = GL_FALSE; + GLboolean tempsUsed[MAX_PROGRAM_TEMPS + 1]; + GLint wposTemp = -1, winHeightConst = -1; assert(procType == TGSI_PROCESSOR_FRAGMENT || procType == TGSI_PROCESSOR_VERTEX); + find_temporaries(program, tempsUsed); + + if (procType == TGSI_PROCESSOR_FRAGMENT) { + if (program->InputsRead & FRAG_BIT_WPOS) { + /* Fragment program uses fragment position input. + * Need to replace instances of INPUT[WPOS] with temp T + * where T = INPUT[WPOS] by y is inverted. + */ + static const gl_state_index winSizeState[STATE_LENGTH] + = { STATE_INTERNAL, STATE_FB_SIZE, 0, 0, 0 }; + winHeightConst = _mesa_add_state_reference(program->Parameters, + winSizeState); + wposTemp = find_free_temporary(tempsUsed); + } + } + + *(struct tgsi_version *) &tokens[0] = tgsi_build_version(); header = (struct tgsi_header *) &tokens[1]; @@ -884,11 +1018,9 @@ st_translate_mesa_program( /* temporary decls */ { - GLboolean tempsUsed[MAX_PROGRAM_TEMPS + 1]; GLboolean inside_range = GL_FALSE; GLuint start_range = 0; - find_temporaries(program, tempsUsed); tempsUsed[MAX_PROGRAM_TEMPS] = GL_FALSE; for (i = 0; i < MAX_PROGRAM_TEMPS + 1; i++) { if (tempsUsed[i] && !inside_range) { @@ -1018,7 +1150,17 @@ st_translate_mesa_program( } } + /* invert WPOS fragment input */ + if (wposTemp >= 0) { + ti += emit_inverted_wpos(&tokens[ti], wposTemp, winHeightConst, + inputMapping[FRAG_ATTRIB_WPOS], + header, maxTokens - ti); + preamble_size = 2; /* two instructions added */ + } + for (i = 0; i < program->NumInstructions; i++) { + struct tgsi_full_instruction fullinst; + compile_instruction( &program->Instructions[i], &fullinst, @@ -1028,7 +1170,8 @@ st_translate_mesa_program( indirectAccess, preamble_size, procType, - &insideSubroutine ); + &insideSubroutine, + wposTemp); ti += tgsi_build_full_instruction( &fullinst, |