/* * Mesa 3-D graphics library * Version: 6.5.3 * * Copyright (C) 1999-2007 Brian Paul All Rights Reserved. * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included * in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ /** * \file program.c * Vertex and fragment program support functions. * \author Brian Paul */ #include "main/glheader.h" #include "main/context.h" #include "main/hash.h" #include "program.h" #include "prog_cache.h" #include "prog_parameter.h" #include "prog_instruction.h" /** * A pointer to this dummy program is put into the hash table when * glGenPrograms is called. */ struct gl_program _mesa_DummyProgram; /** * Init context's vertex/fragment program state */ void _mesa_init_program(GLcontext *ctx) { GLuint i; /* * If this assertion fails, we need to increase the field * size for register indexes. */ ASSERT(ctx->Const.VertexProgram.MaxUniformComponents / 4 <= (1 << INST_INDEX_BITS)); ASSERT(ctx->Const.FragmentProgram.MaxUniformComponents / 4 <= (1 << INST_INDEX_BITS)); ctx->Program.ErrorPos = -1; ctx->Program.ErrorString = _mesa_strdup(""); #if FEATURE_NV_vertex_program || FEATURE_ARB_vertex_program ctx->VertexProgram.Enabled = GL_FALSE; #if FEATURE_es2_glsl ctx->VertexProgram.PointSizeEnabled = GL_TRUE; #else ctx->VertexProgram.PointSizeEnabled = GL_FALSE; #endif ctx->VertexProgram.TwoSideEnabled = GL_FALSE; _mesa_reference_vertprog(ctx, &ctx->VertexProgram.Current, ctx->Shared->DefaultVertexProgram); assert(ctx->VertexProgram.Current); for (i = 0; i < MAX_NV_VERTEX_PROGRAM_PARAMS / 4; i++) { ctx->VertexProgram.TrackMatrix[i] = GL_NONE; ctx->VertexProgram.TrackMatrixTransform[i] = GL_IDENTITY_NV; } ctx->VertexProgram.Cache = _mesa_new_program_cache(); #endif #if FEATURE_NV_fragment_program || FEATURE_ARB_fragment_program ctx->FragmentProgram.Enabled = GL_FALSE; _mesa_reference_fragprog(ctx, &ctx->FragmentProgram.Current, ctx->Shared->DefaultFragmentProgram); assert(ctx->FragmentProgram.Current); ctx->FragmentProgram.Cache = _mesa_new_program_cache(); #endif /* XXX probably move this stuff */ #if FEATURE_ATI_fragment_shader ctx->ATIFragmentShader.Enabled = GL_FALSE; ctx->ATIFragmentShader.Current = ctx->Shared->DefaultFragmentShader; assert(ctx->ATIFragmentShader.Current); ctx->ATIFragmentShader.Current->RefCount++; #endif } /** * Free a context's vertex/fragment program state */ void _mesa_free_program_data(GLcontext *ctx) { #if FEATURE_NV_vertex_program || FEATURE_ARB_vertex_program _mesa_reference_vertprog(ctx, &ctx->VertexProgram.Current, NULL); _mesa_delete_program_cache(ctx, ctx->VertexProgram.Cache); #endif #if FEATURE_NV_fragment_program || FEATURE_ARB_fragment_program _mesa_reference_fragprog(ctx, &ctx->FragmentProgram.Current, NULL); _mesa_delete_program_cache(ctx, ctx->FragmentProgram.Cache); #endif /* XXX probably move this stuff */ #if FEATURE_ATI_fragment_shader if (ctx->ATIFragmentShader.Current) { ctx->ATIFragmentShader.Current->RefCount--; if (ctx->ATIFragmentShader.Current->RefCount <= 0) { _mesa_free(ctx->ATIFragmentShader.Current); } } #endif _mesa_free((void *) ctx->Program.ErrorString); } /** * Update the default program objects in the given context to reference those * specified in the shared state and release those referencing the old * shared state. */ void _mesa_update_default_objects_program(GLcontext *ctx) { #if FEATURE_NV_vertex_program || FEATURE_ARB_vertex_program _mesa_reference_vertprog(ctx, &ctx->VertexProgram.Current, (struct gl_vertex_program *) ctx->Shared->DefaultVertexProgram); assert(ctx->VertexProgram.Current); #endif #if FEATURE_NV_fragment_program || FEATURE_ARB_fragment_program _mesa_reference_fragprog(ctx, &ctx->FragmentProgram.Current, (struct gl_fragment_program *) ctx->Shared->DefaultFragmentProgram); assert(ctx->FragmentProgram.Current); #endif /* XXX probably move this stuff */ #if FEATURE_ATI_fragment_shader if (ctx->ATIFragmentShader.Current) { ctx->ATIFragmentShader.Current->RefCount--; if (ctx->ATIFragmentShader.Current->RefCount <= 0) { _mesa_free(ctx->ATIFragmentShader.Current); } } ctx->ATIFragmentShader.Current = (struct ati_fragment_shader *) ctx->Shared->DefaultFragmentShader; assert(ctx->ATIFragmentShader.Current); ctx->ATIFragmentShader.Current->RefCount++; #endif } /** * Set the vertex/fragment program error state (position and error string). * This is generally called from within the parsers. */ void _mesa_set_program_error(GLcontext *ctx, GLint pos, const char *string) { ctx->Program.ErrorPos = pos; _mesa_free((void *) ctx->Program.ErrorString); if (!string) string = ""; ctx->Program.ErrorString = _mesa_strdup(string); } /** * Find the line number and column for 'pos' within 'string'. * Return a copy of the line which contains 'pos'. Free the line with * _mesa_free(). * \param string the program string * \param pos the position within the string * \param line returns the line number corresponding to 'pos'. * \param col returns the column number corresponding to 'pos'. * \return copy of the line containing 'pos'. */ const GLubyte * _mesa_find_line_column(const GLubyte *string, const GLubyte *pos, GLint *line, GLint *col) { const GLubyte *lineStart = string; const GLubyte *p = string; GLubyte *s; int len; *line = 1; while (p != pos) { if (*p == (GLubyte) '\n') { (*line)++; lineStart = p + 1; } p++; } *col = (pos - lineStart) + 1; /* return copy of this line */ while (*p != 0 && *p != '\n') p++; len = p - lineStart; s = (GLubyte *) _mesa_malloc(len + 1); _mesa_memcpy(s, lineStart, len); s[len] = 0; return s; } /** * Initialize a new vertex/fragment program object. */ static struct gl_program * _mesa_init_program_struct( GLcontext *ctx, struct gl_program *prog, GLenum target, GLuint id) { (void) ctx; if (prog) { GLuint i; _mesa_bzero(prog, sizeof(*prog)); prog->Id = id; prog->Target = target; prog->Resident = GL_TRUE; prog->RefCount = 1; prog->Format = GL_PROGRAM_FORMAT_ASCII_ARB; /* default mapping from samplers to texture units */ for (i = 0; i < MAX_SAMPLERS; i++) prog->SamplerUnits[i] = i; } return prog; } /** * Initialize a new fragment program object. */ struct gl_program * _mesa_init_fragment_program( GLcontext *ctx, struct gl_fragment_program *prog, GLenum target, GLuint id) { if (prog) return _mesa_init_program_struct( ctx, &prog->Base, target, id ); else return NULL; } /** * Initialize a new vertex program object. */ struct gl_program * _mesa_init_vertex_program( GLcontext *ctx, struct gl_vertex_program *prog, GLenum target, GLuint id) { if (prog) return _mesa_init_program_struct( ctx, &prog->Base, target, id ); else return NULL; } /** * Allocate and initialize a new fragment/vertex program object but * don't put it into the program hash table. Called via * ctx->Driver.NewProgram. May be overridden (ie. replaced) by a * device driver function to implement OO deriviation with additional * types not understood by this function. * * \param ctx context * \param id program id/number * \param target program target/type * \return pointer to new program object */ struct gl_program * _mesa_new_program(GLcontext *ctx, GLenum target, GLuint id) { struct gl_program *prog; switch (target) { case GL_VERTEX_PROGRAM_ARB: /* == GL_VERTEX_PROGRAM_NV */ case GL_VERTEX_STATE_PROGRAM_NV: prog = _mesa_init_vertex_program(ctx, CALLOC_STRUCT(gl_vertex_program), target, id ); break; case GL_FRAGMENT_PROGRAM_NV: case GL_FRAGMENT_PROGRAM_ARB: prog =_mesa_init_fragment_program(ctx, CALLOC_STRUCT(gl_fragment_program), target, id ); break; default: _mesa_problem(ctx, "bad target in _mesa_new_program"); prog = NULL; } return prog; } /** * Delete a program and remove it from the hash table, ignoring the * reference count. * Called via ctx->Driver.DeleteProgram. May be wrapped (OO deriviation) * by a device driver function. */ void _mesa_delete_program(GLcontext *ctx, struct gl_program *prog) { (void) ctx; ASSERT(prog); ASSERT(prog->RefCount==0); if (prog == &_mesa_DummyProgram) return; if (prog->String) _mesa_free(prog->String); _mesa_free_instructions(prog->Instructions, prog->NumInstructions); if (prog->Parameters) { _mesa_free_parameter_list(prog->Parameters); } if (prog->Varying) { _mesa_free_parameter_list(prog->Varying); } if (prog->Attributes) { _mesa_free_parameter_list(prog->Attributes); } /* XXX this is a little ugly */ if (prog->Target == GL_VERTEX_PROGRAM_ARB) { struct gl_vertex_program *vprog = (struct gl_vertex_program *) prog; if (vprog->TnlData) _mesa_free(vprog->TnlData); } _mesa_free(prog); } /** * Return the gl_program object for a given ID. * Basically just a wrapper for _mesa_HashLookup() to avoid a lot of * casts elsewhere. */ struct gl_program * _mesa_lookup_program(GLcontext *ctx, GLuint id) { if (id) return (struct gl_program *) _mesa_HashLookup(ctx->Shared->Programs, id); else return NULL; } /** * Reference counting for vertex/fragment programs */ void _mesa_reference_program(GLcontext *ctx, struct gl_program **ptr, struct gl_program *prog) { assert(ptr); if (*ptr && prog) { /* sanity check */ if ((*ptr)->Target == GL_VERTEX_PROGRAM_ARB) ASSERT(prog->Target == GL_VERTEX_PROGRAM_ARB); else if ((*ptr)->Target == GL_FRAGMENT_PROGRAM_ARB) ASSERT(prog->Target == GL_FRAGMENT_PROGRAM_ARB || prog->Target == GL_FRAGMENT_PROGRAM_NV); } if (*ptr == prog) { return; /* no change */ } if (*ptr) { GLboolean deleteFlag; /*_glthread_LOCK_MUTEX((*ptr)->Mutex);*/ #if 0 printf("Program %p ID=%u Target=%s Refcount-- to %d\n", *ptr, (*ptr)->Id, ((*ptr)->Target == GL_VERTEX_PROGRAM_ARB ? "VP" : "FP"), (*ptr)->RefCount - 1); #endif ASSERT((*ptr)->RefCount > 0); (*ptr)->RefCount--; deleteFlag = ((*ptr)->RefCount == 0); /*_glthread_UNLOCK_MUTEX((*ptr)->Mutex);*/ if (deleteFlag) { ASSERT(ctx); ctx->Driver.DeleteProgram(ctx, *ptr); } *ptr = NULL; } assert(!*ptr); if (prog) { /*_glthread_LOCK_MUTEX(prog->Mutex);*/ prog->RefCount++; #if 0 printf("Program %p ID=%u Target=%s Refcount++ to %d\n", prog, prog->Id, (prog->Target == GL_VERTEX_PROGRAM_ARB ? "VP" : "FP"), prog->RefCount); #endif /*_glthread_UNLOCK_MUTEX(prog->Mutex);*/ } *ptr = prog; } /** * Return a copy of a program. * XXX Problem here if the program object is actually OO-derivation * made by a device driver. */ struct gl_program * _mesa_clone_program(GLcontext *ctx, const struct gl_program *prog) { struct gl_program *clone; clone = ctx->Driver.NewProgram(ctx, prog->Target, prog->Id); if (!clone) return NULL; assert(clone->Target == prog->Target); assert(clone->RefCount == 1); clone->String = (GLubyte *) _mesa_strdup((char *) prog->String); clone->Format = prog->Format; clone->Instructions = _mesa_alloc_instructions(prog->NumInstructions); if (!clone->Instructions) { _mesa_reference_program(ctx, &clone, NULL); return NULL; } _mesa_copy_instructions(clone->Instructions, prog->Instructions, prog->NumInstructions); clone->InputsRead = prog->InputsRead; clone->OutputsWritten = prog->OutputsWritten; clone->SamplersUsed = prog->SamplersUsed; clone->ShadowSamplers = prog->ShadowSamplers; memcpy(clone->TexturesUsed, prog->TexturesUsed, sizeof(prog->TexturesUsed)); if (prog->Parameters) clone->Parameters = _mesa_clone_parameter_list(prog->Parameters); memcpy(clone->LocalParams, prog->LocalParams, sizeof(clone->LocalParams)); if (prog->Varying) clone->Varying = _mesa_clone_parameter_list(prog->Varying); if (prog->Attributes) clone->Attributes = _mesa_clone_parameter_list(prog->Attributes); memcpy(clone->LocalParams, prog->LocalParams, sizeof(clone->LocalParams)); clone->NumInstructions = prog->NumInstructions; clone->NumTemporaries = prog->NumTemporaries; clone->NumParameters = prog->NumParameters; clone->NumAttributes = prog->NumAttributes; clone->NumAddressRegs = prog->NumAddressRegs; clone->NumNativeInstructions = prog->NumNativeInstructions; clone->NumNativeTemporaries = prog->NumNativeTemporaries; clone->NumNativeParameters = prog->NumNativeParameters; clone->NumNativeAttributes = prog->NumNativeAttributes; clone->NumNativeAddressRegs = prog->NumNativeAddressRegs; clone->NumAluInstructions = prog->NumAluInstructions; clone->NumTexInstructions = prog->NumTexInstructions; clone->NumTexIndirections = prog->NumTexIndirections; clone->NumNativeAluInstructions = prog->NumNativeAluInstructions; clone->NumNativeTexInstructions = prog->NumNativeTexInstructions; clone->NumNativeTexIndirections = prog->NumNativeTexIndirections; switch (prog->Target) { case GL_VERTEX_PROGRAM_ARB: { const struct gl_vertex_program *vp = (const struct gl_vertex_program *) prog; struct gl_vertex_program *vpc = (struct gl_vertex_program *) clone; vpc->IsPositionInvariant = vp->IsPositionInvariant; } break; case GL_FRAGMENT_PROGRAM_ARB: { const struct gl_fragment_program *fp = (const struct gl_fragment_program *) prog; struct gl_fragment_program *fpc = (struct gl_fragment_program *) clone; fpc->FogOption = fp->FogOption; fpc->UsesKill = fp->UsesKill; } break; default: _mesa_problem(NULL, "Unexpected target in _mesa_clone_program"); } return clone; } /** * Insert 'count' NOP instructions at 'start' in the given program. * Adjust branch targets accordingly. */ GLboolean _mesa_insert_instructions(struct gl_program *prog, GLuint start, GLuint count) { const GLuint origLen = prog->NumInstructions; const GLuint newLen = origLen + count; struct prog_instruction *newInst; GLuint i; /* adjust branches */ for (i = 0; i < prog->NumInstructions; i++) { struct prog_instruction *inst = prog->Instructions + i; if (inst->BranchTarget > 0) { if ((GLuint)inst->BranchTarget >= start) { inst->BranchTarget += count; } } } /* Alloc storage for new instructions */ newInst = _mesa_alloc_instructions(newLen); if (!newInst) { return GL_FALSE; } /* Copy 'start' instructions into new instruction buffer */ _mesa_copy_instructions(newInst, prog->Instructions, start); /* init the new instructions */ _mesa_init_instructions(newInst + start, count); /* Copy the remaining/tail instructions to new inst buffer */ _mesa_copy_instructions(newInst + start + count, prog->Instructions + start, origLen - start); /* free old instructions */ _mesa_free_instructions(prog->Instructions, origLen); /* install new instructions */ prog->Instructions = newInst; prog->NumInstructions = newLen; return GL_TRUE; } /** * Delete 'count' instructions at 'start' in the given program. * Adjust branch targets accordingly. */ GLboolean _mesa_delete_instructions(struct gl_program *prog, GLuint start, GLuint count) { const GLuint origLen = prog->NumInstructions; const GLuint newLen = origLen - count; struct prog_instruction *newInst; GLuint i; /* adjust branches */ for (i = 0; i < prog->NumInstructions; i++) { struct prog_instruction *inst = prog->Instructions + i; if (inst->BranchTarget > 0) { if (inst->BranchTarget > start) { inst->BranchTarget -= count; } } } /* Alloc storage for new instructions */ newInst = _mesa_alloc_instructions(newLen); if (!newInst) { return GL_FALSE; } /* Copy 'start' instructions into new instruction buffer */ _mesa_copy_instructions(newInst, prog->Instructions, start); /* Copy the remaining/tail instructions to new inst buffer */ _mesa_copy_instructions(newInst + start, prog->Instructions + start + count, newLen - start); /* free old instructions */ _mesa_free_instructions(prog->Instructions, origLen); /* install new instructions */ prog->Instructions = newInst; prog->NumInstructions = newLen; return GL_TRUE; } /** * Search instructions for registers that match (oldFile, oldIndex), * replacing them with (newFile, newIndex). */ static void replace_registers(struct prog_instruction *inst, GLuint numInst, GLuint oldFile, GLuint oldIndex, GLuint newFile, GLuint newIndex) { GLuint i, j; for (i = 0; i < numInst; i++) { /* src regs */ for (j = 0; j < _mesa_num_inst_src_regs(inst->Opcode); j++) { if (inst[i].SrcReg[j].File == oldFile && inst[i].SrcReg[j].Index == oldIndex) { inst[i].SrcReg[j].File = newFile; inst[i].SrcReg[j].Index = newIndex; } } /* dst reg */ if (inst[i].DstReg.File == oldFile && inst[i].DstReg.Index == oldIndex) { inst[i].DstReg.File = newFile; inst[i].DstReg.Index = newIndex; } } } /** * Search instructions for references to program parameters. When found, * increment the parameter index by 'offset'. * Used when combining programs. */ static void adjust_param_indexes(struct prog_instruction *inst, GLuint numInst, GLuint offset) { GLuint i, j; for (i = 0; i < numInst; i++) { for (j = 0; j < _mesa_num_inst_src_regs(inst->Opcode); j++) { GLuint f = inst[i].SrcReg[j].File; if (f == PROGRAM_CONSTANT || f == PROGRAM_UNIFORM || f == PROGRAM_STATE_VAR) { inst[i].SrcReg[j].Index += offset; } } } } /** * Combine two programs into one. Fix instructions so the outputs of * the first program go to the inputs of the second program. */ struct gl_program * _mesa_combine_programs(GLcontext *ctx, const struct gl_program *progA, const struct gl_program *progB) { struct prog_instruction *newInst; struct gl_program *newProg; const GLuint lenA = progA->NumInstructions - 1; /* omit END instr */ const GLuint lenB = progB->NumInstructions; const GLuint numParamsA = _mesa_num_parameters(progA->Parameters); const GLuint newLength = lenA + lenB; GLbitfield inputsB; GLuint i; ASSERT(progA->Target == progB->Target); newInst = _mesa_alloc_instructions(newLength); if (!newInst) return GL_FALSE; _mesa_copy_instructions(newInst, progA->Instructions, lenA); _mesa_copy_instructions(newInst + lenA, progB->Instructions, lenB); /* adjust branch / instruction addresses for B's instructions */ for (i = 0; i < lenB; i++) { newInst[lenA + i].BranchTarget += lenA; } newProg = ctx->Driver.NewProgram(ctx, progA->Target, 0); newProg->Instructions = newInst; newProg->NumInstructions = newLength; 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_COLOR)) && (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 " "_mesa_combine_programs(), using 31"); tempReg = 31; } /* replace writes to result.color[0] with tempReg */ replace_registers(newInst, lenA, PROGRAM_OUTPUT, FRAG_RESULT_COLOR, PROGRAM_TEMPORARY, tempReg); /* replace reads from the input color with tempReg */ replace_registers(newInst + lenA, lenB, progB_colorFile, progB_colorIndex, /* search for */ PROGRAM_TEMPORARY, tempReg /* replace with */ ); } /* compute combined program's InputsRead */ inputsB = progB_inputsRead; if (progA->OutputsWritten & (1 << FRAG_RESULT_COLOR)) { inputsB &= ~(1 << FRAG_ATTRIB_COL0); } newProg->InputsRead = progA->InputsRead | inputsB; newProg->OutputsWritten = progB->OutputsWritten; newProg->SamplersUsed = progA->SamplersUsed | progB->SamplersUsed; } else { /* vertex program */ assert(0); /* XXX todo */ } /* * Merge parameters (uniforms, constants, etc) */ newProg->Parameters = _mesa_combine_parameter_lists(progA->Parameters, progB->Parameters); adjust_param_indexes(newInst + lenA, lenB, numParamsA); return newProg; } /** * Scan the given program to find a free register of the given type. * \param regFile - PROGRAM_INPUT, PROGRAM_OUTPUT or PROGRAM_TEMPORARY */ GLint _mesa_find_free_register(const struct gl_program *prog, GLuint regFile) { GLboolean used[MAX_PROGRAM_TEMPS]; GLuint i, k; assert(regFile == PROGRAM_INPUT || regFile == PROGRAM_OUTPUT || regFile == PROGRAM_TEMPORARY); _mesa_memset(used, 0, sizeof(used)); for (i = 0; i < prog->NumInstructions; i++) { const struct prog_instruction *inst = prog->Instructions + i; const GLuint n = _mesa_num_inst_src_regs(inst->Opcode); for (k = 0; k < n; k++) { if (inst->SrcReg[k].File == regFile) { used[inst->SrcReg[k].Index] = GL_TRUE; } } } for (i = 0; i < MAX_PROGRAM_TEMPS; i++) { if (!used[i]) return i; } return -1; } /** * "Post-process" a GPU program. This is intended to be used for debugging. * Example actions include no-op'ing instructions or changing instruction * behaviour. */ void _mesa_postprocess_program(GLcontext *ctx, struct gl_program *prog) { static const GLfloat white[4] = { 0.5, 0.5, 0.5, 0.5 }; GLuint i; GLuint whiteSwizzle; GLint whiteIndex = _mesa_add_unnamed_constant(prog->Parameters, white, 4, &whiteSwizzle); (void) whiteIndex; for (i = 0; i < prog->NumInstructions; i++) { struct prog_instruction *inst = prog->Instructions + i; const GLuint n = _mesa_num_inst_src_regs(inst->Opcode); (void) n; if (_mesa_is_tex_instruction(inst->Opcode)) { #if 0 /* replace TEX/TXP/TXB with MOV */ inst->Opcode = OPCODE_MOV; inst->DstReg.WriteMask = WRITEMASK_XYZW; inst->SrcReg[0].Swizzle = SWIZZLE_XYZW; inst->SrcReg[0].Negate = NEGATE_NONE; #endif #if 0 /* disable shadow texture mode */ inst->TexShadow = 0; #endif } if (inst->Opcode == OPCODE_TXP) { #if 0 inst->Opcode = OPCODE_MOV; inst->DstReg.WriteMask = WRITEMASK_XYZW; inst->SrcReg[0].File = PROGRAM_CONSTANT; inst->SrcReg[0].Index = whiteIndex; inst->SrcReg[0].Swizzle = SWIZZLE_XYZW; inst->SrcReg[0].Negate = NEGATE_NONE; #endif #if 0 inst->TexShadow = 0; #endif #if 0 inst->Opcode = OPCODE_TEX; inst->TexShadow = 0; #endif } } }