/*
* Mesa 3-D graphics library
- * Version: 6.5.1
+ * Version: 6.5.3
*
- * Copyright (C) 1999-2006 Brian Paul All Rights Reserved.
+ * 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"),
#include "glheader.h"
#include "context.h"
-#include "imports.h"
-#include "mtypes.h"
-#include "program.h"
+#include "prog_parameter.h"
+#include "prog_statevars.h"
#include "programopt.h"
-#include "program_instruction.h"
+#include "prog_instruction.h"
/**
- * This is used for helping with position-invariant vertex programs.
- * It appends extra instructions to the given program to do the
- * vertex position transformation (multiply by the MVP matrix).
+ * This function inserts instructions for coordinate modelview * projection
+ * into a vertex program.
+ * May be used to implement the position_invariant option.
*/
void
-_mesa_append_modelview_code(GLcontext *ctx, struct gl_vertex_program *vprog)
+_mesa_insert_mvp_code(GLcontext *ctx, struct gl_vertex_program *vprog)
{
- struct prog_instruction newInst[5];
+ struct prog_instruction *newInst;
const GLuint origLen = vprog->Base.NumInstructions;
+ const GLuint newLen = origLen + 4;
GLuint i;
/*
* Setup state references for the modelview/projection matrix.
* XXX we should check if these state vars are already declared.
*/
- static const GLint mvpState[4][5] = {
- { STATE_MATRIX, STATE_MVP, 0, 0, 0 }, /* state.matrix.mvp.row[0] */
- { STATE_MATRIX, STATE_MVP, 0, 1, 1 }, /* state.matrix.mvp.row[1] */
- { STATE_MATRIX, STATE_MVP, 0, 2, 2 }, /* state.matrix.mvp.row[2] */
- { STATE_MATRIX, STATE_MVP, 0, 3, 3 }, /* state.matrix.mvp.row[3] */
+ static const gl_state_index mvpState[4][STATE_LENGTH] = {
+ { STATE_MVP_MATRIX, 0, 0, 0, 0 }, /* state.matrix.mvp.row[0] */
+ { STATE_MVP_MATRIX, 0, 1, 1, 0 }, /* state.matrix.mvp.row[1] */
+ { STATE_MVP_MATRIX, 0, 2, 2, 0 }, /* state.matrix.mvp.row[2] */
+ { STATE_MVP_MATRIX, 0, 3, 3, 0 }, /* state.matrix.mvp.row[3] */
};
GLint mvpRef[4];
mvpState[i]);
}
+ /* Alloc storage for new instructions */
+ newInst = _mesa_alloc_instructions(newLen);
+ if (!newInst) {
+ _mesa_error(ctx, GL_OUT_OF_MEMORY,
+ "glProgramString(inserting position_invariant code)");
+ return;
+ }
+
/*
* Generated instructions:
* newInst[0] = DP4 result.position.x, mvp.row[0], vertex.position;
* newInst[1] = DP4 result.position.y, mvp.row[1], vertex.position;
* newInst[2] = DP4 result.position.z, mvp.row[2], vertex.position;
* newInst[3] = DP4 result.position.w, mvp.row[3], vertex.position;
- * newInst[4] = END;
*/
+ _mesa_init_instructions(newInst, 4);
for (i = 0; i < 4; i++) {
- _mesa_init_instruction(newInst + i);
newInst[i].Opcode = OPCODE_DP4;
newInst[i].DstReg.File = PROGRAM_OUTPUT;
newInst[i].DstReg.Index = VERT_RESULT_HPOS;
newInst[i].SrcReg[1].Index = VERT_ATTRIB_POS;
newInst[i].SrcReg[1].Swizzle = SWIZZLE_NOOP;
}
- newInst[4].Opcode = OPCODE_END;
- /*
- * Append new instructions onto program.
- */
- vprog->Base.Instructions
- = _mesa_realloc_instructions(vprog->Base.Instructions,
- origLen, origLen + 4);
- if (!vprog->Base.Instructions) {
- _mesa_error(ctx, GL_OUT_OF_MEMORY,
- "glProgramString(generating position transformation code)");
- return;
- }
- /* subtract one to overwrite original program's END instruction */
- _mesa_memcpy(vprog->Base.Instructions + origLen - 1,
- newInst, sizeof(newInst));
+ /* Append original instructions after new instructions */
+ _mesa_copy_instructions (newInst + 4, vprog->Base.Instructions, origLen);
- vprog->Base.NumInstructions = origLen + 4;
+ /* free old instructions */
+ _mesa_free(vprog->Base.Instructions);
+
+ /* install new instructions */
+ vprog->Base.Instructions = newInst;
+ vprog->Base.NumInstructions = newLen;
vprog->Base.InputsRead |= VERT_BIT_POS;
vprog->Base.OutputsWritten |= (1 << VERT_RESULT_HPOS);
}
/**
* Append extra instructions onto the given fragment program to implement
- * the fog mode specified by program->FogOption.
- * XXX incomplete.
+ * the fog mode specified by fprog->FogOption.
+ * The fragment.fogcoord input is used to compute the fog blend factor.
+ *
+ * XXX with a little work, this function could be adapted to add fog code
+ * to vertex programs too.
*/
void
_mesa_append_fog_code(GLcontext *ctx, struct gl_fragment_program *fprog)
{
- struct prog_instruction newInst[10];
-
- switch (fprog->FogOption) {
- case GL_LINEAR:
- /* lerp */
- break;
- case GL_EXP:
- break;
- case GL_EXP2:
- break;
- case GL_NONE:
- /* no-op */
+ static const gl_state_index fogPStateOpt[STATE_LENGTH]
+ = { STATE_INTERNAL, STATE_FOG_PARAMS_OPTIMIZED, 0, 0, 0 };
+ static const gl_state_index fogColorState[STATE_LENGTH]
+ = { STATE_FOG_COLOR, 0, 0, 0, 0};
+ struct prog_instruction *newInst, *inst;
+ const GLuint origLen = fprog->Base.NumInstructions;
+ const GLuint newLen = origLen + 5;
+ GLuint i;
+ GLint fogPRefOpt, fogColorRef; /* state references */
+ GLuint colorTemp, fogFactorTemp; /* temporary registerss */
+
+ if (fprog->FogOption == GL_NONE) {
+ _mesa_problem(ctx, "_mesa_append_fog_code() called for fragment program"
+ " with FogOption == GL_NONE");
return;
- default:
- _mesa_problem(ctx, "Invalid fog option");
+ }
+
+ /* Alloc storage for new instructions */
+ newInst = _mesa_alloc_instructions(newLen);
+ if (!newInst) {
+ _mesa_error(ctx, GL_OUT_OF_MEMORY,
+ "glProgramString(inserting fog_option code)");
return;
}
+ /* Copy orig instructions into new instruction buffer */
+ _mesa_copy_instructions(newInst, fprog->Base.Instructions, origLen);
+
+ /* PARAM fogParamsRefOpt = internal optimized fog params; */
+ fogPRefOpt
+ = _mesa_add_state_reference(fprog->Base.Parameters, fogPStateOpt);
+ /* PARAM fogColorRef = state.fog.color; */
+ fogColorRef
+ = _mesa_add_state_reference(fprog->Base.Parameters, fogColorState);
+
+ /* TEMP colorTemp; */
+ colorTemp = fprog->Base.NumTemporaries++;
+ /* TEMP fogFactorTemp; */
+ fogFactorTemp = fprog->Base.NumTemporaries++;
+
+ /* Scan program to find where result.color is written */
+ inst = newInst;
+ for (i = 0; i < fprog->Base.NumInstructions; i++) {
+ if (inst->Opcode == OPCODE_END)
+ break;
+ if (inst->DstReg.File == PROGRAM_OUTPUT &&
+ inst->DstReg.Index == FRAG_RESULT_COLR) {
+ /* change the instruction to write to colorTemp w/ clamping */
+ inst->DstReg.File = PROGRAM_TEMPORARY;
+ inst->DstReg.Index = colorTemp;
+ inst->SaturateMode = SATURATE_ZERO_ONE;
+ /* don't break (may be several writes to result.color) */
+ }
+ inst++;
+ }
+ assert(inst->Opcode == OPCODE_END); /* we'll overwrite this inst */
+
+ _mesa_init_instructions(inst, 5);
+
+ /* emit instructions to compute fog blending factor */
+ if (fprog->FogOption == GL_LINEAR) {
+ /* MAD fogFactorTemp.x, fragment.fogcoord.x, fogPRefOpt.x, fogPRefOpt.y; */
+ inst->Opcode = OPCODE_MAD;
+ inst->DstReg.File = PROGRAM_TEMPORARY;
+ inst->DstReg.Index = fogFactorTemp;
+ inst->DstReg.WriteMask = WRITEMASK_X;
+ inst->SrcReg[0].File = PROGRAM_INPUT;
+ inst->SrcReg[0].Index = FRAG_ATTRIB_FOGC;
+ inst->SrcReg[0].Swizzle = SWIZZLE_X;
+ inst->SrcReg[1].File = PROGRAM_STATE_VAR;
+ inst->SrcReg[1].Index = fogPRefOpt;
+ inst->SrcReg[1].Swizzle = SWIZZLE_X;
+ inst->SrcReg[2].File = PROGRAM_STATE_VAR;
+ inst->SrcReg[2].Index = fogPRefOpt;
+ inst->SrcReg[2].Swizzle = SWIZZLE_Y;
+ inst->SaturateMode = SATURATE_ZERO_ONE;
+ inst++;
+ }
+ else {
+ ASSERT(fprog->FogOption == GL_EXP || fprog->FogOption == GL_EXP2);
+ /* fogPRefOpt.z = d/ln(2), fogPRefOpt.w = d/sqrt(ln(2) */
+ /* EXP: MUL fogFactorTemp.x, fogPRefOpt.z, fragment.fogcoord.x; */
+ /* EXP2: MUL fogFactorTemp.x, fogPRefOpt.w, fragment.fogcoord.x; */
+ inst->Opcode = OPCODE_MUL;
+ inst->DstReg.File = PROGRAM_TEMPORARY;
+ inst->DstReg.Index = fogFactorTemp;
+ inst->DstReg.WriteMask = WRITEMASK_X;
+ inst->SrcReg[0].File = PROGRAM_STATE_VAR;
+ inst->SrcReg[0].Index = fogPRefOpt;
+ inst->SrcReg[0].Swizzle
+ = (fprog->FogOption == GL_EXP) ? SWIZZLE_Z : SWIZZLE_W;
+ inst->SrcReg[1].File = PROGRAM_INPUT;
+ inst->SrcReg[1].Index = FRAG_ATTRIB_FOGC;
+ inst->SrcReg[1].Swizzle = SWIZZLE_X;
+ inst++;
+ if (fprog->FogOption == GL_EXP2) {
+ /* MUL fogFactorTemp.x, fogFactorTemp.x, fogFactorTemp.x; */
+ inst->Opcode = OPCODE_MUL;
+ inst->DstReg.File = PROGRAM_TEMPORARY;
+ inst->DstReg.Index = fogFactorTemp;
+ inst->DstReg.WriteMask = WRITEMASK_X;
+ inst->SrcReg[0].File = PROGRAM_TEMPORARY;
+ inst->SrcReg[0].Index = fogFactorTemp;
+ inst->SrcReg[0].Swizzle = SWIZZLE_X;
+ inst->SrcReg[1].File = PROGRAM_TEMPORARY;
+ inst->SrcReg[1].Index = fogFactorTemp;
+ inst->SrcReg[1].Swizzle = SWIZZLE_X;
+ inst++;
+ }
+ /* EX2_SAT fogFactorTemp.x, -fogFactorTemp.x; */
+ inst->Opcode = OPCODE_EX2;
+ inst->DstReg.File = PROGRAM_TEMPORARY;
+ inst->DstReg.Index = fogFactorTemp;
+ inst->DstReg.WriteMask = WRITEMASK_X;
+ inst->SrcReg[0].File = PROGRAM_TEMPORARY;
+ inst->SrcReg[0].Index = fogFactorTemp;
+ inst->SrcReg[0].NegateBase = GL_TRUE;
+ inst->SrcReg[0].Swizzle = SWIZZLE_X;
+ inst->SaturateMode = SATURATE_ZERO_ONE;
+ inst++;
+ }
+ /* LRP result.color.xyz, fogFactorTemp.xxxx, colorTemp, fogColorRef; */
+ inst->Opcode = OPCODE_LRP;
+ inst->DstReg.File = PROGRAM_OUTPUT;
+ inst->DstReg.Index = FRAG_RESULT_COLR;
+ inst->DstReg.WriteMask = WRITEMASK_XYZ;
+ inst->SrcReg[0].File = PROGRAM_TEMPORARY;
+ inst->SrcReg[0].Index = fogFactorTemp;
+ inst->SrcReg[0].Swizzle
+ = MAKE_SWIZZLE4(SWIZZLE_X, SWIZZLE_X, SWIZZLE_X, SWIZZLE_X);
+ inst->SrcReg[1].File = PROGRAM_TEMPORARY;
+ inst->SrcReg[1].Index = colorTemp;
+ inst->SrcReg[1].Swizzle = SWIZZLE_NOOP;
+ inst->SrcReg[2].File = PROGRAM_STATE_VAR;
+ inst->SrcReg[2].Index = fogColorRef;
+ inst->SrcReg[2].Swizzle = SWIZZLE_NOOP;
+ inst++;
+ /* MOV result.color.w, colorTemp.x; # copy alpha */
+ inst->Opcode = OPCODE_MOV;
+ inst->DstReg.File = PROGRAM_OUTPUT;
+ inst->DstReg.Index = FRAG_RESULT_COLR;
+ inst->DstReg.WriteMask = WRITEMASK_W;
+ inst->SrcReg[0].File = PROGRAM_TEMPORARY;
+ inst->SrcReg[0].Index = colorTemp;
+ inst->SrcReg[0].Swizzle = SWIZZLE_NOOP;
+ inst++;
+ /* END; */
+ inst->Opcode = OPCODE_END;
+ inst++;
+
+ /* free old instructions */
+ _mesa_free(fprog->Base.Instructions);
+
+ /* install new instructions */
+ fprog->Base.Instructions = newInst;
+ fprog->Base.NumInstructions = inst - newInst;
+ fprog->Base.InputsRead |= FRAG_BIT_FOGC;
+ /* XXX do this? fprog->FogOption = GL_NONE; */
+}
+
+
+
+static GLboolean
+is_texture_instruction(const struct prog_instruction *inst)
+{
+ switch (inst->Opcode) {
+ case OPCODE_TEX:
+ case OPCODE_TXB:
+ case OPCODE_TXD:
+ case OPCODE_TXL:
+ case OPCODE_TXP:
+ case OPCODE_TXP_NV:
+ return GL_TRUE;
+ default:
+ return GL_FALSE;
+ }
+}
+
+
+/**
+ * Count the number of texure indirections in the given program.
+ * The program's NumTexIndirections field will be updated.
+ * See the GL_ARB_fragment_program spec (issue 24) for details.
+ * XXX we count texture indirections in texenvprogram.c (maybe use this code
+ * instead and elsewhere).
+ */
+void
+_mesa_count_texture_indirections(struct gl_program *prog)
+{
+ GLuint indirections = 1;
+ GLbitfield tempsOutput = 0x0;
+ GLbitfield aluTemps = 0x0;
+ GLuint i;
- (void) newInst;
+ for (i = 0; i < prog->NumInstructions; i++) {
+ const struct prog_instruction *inst = prog->Instructions + i;
+ if (is_texture_instruction(inst)) {
+ if (((inst->SrcReg[0].File == PROGRAM_TEMPORARY) &&
+ (tempsOutput & (1 << inst->SrcReg[0].Index))) ||
+ ((inst->Opcode != OPCODE_KIL) &&
+ (inst->DstReg.File == PROGRAM_TEMPORARY) &&
+ (aluTemps & (1 << inst->DstReg.Index))))
+ {
+ indirections++;
+ tempsOutput = 0x0;
+ aluTemps = 0x0;
+ }
+ }
+ else {
+ GLuint j;
+ for (j = 0; j < 3; j++) {
+ if (inst->SrcReg[j].File == PROGRAM_TEMPORARY)
+ aluTemps |= (1 << inst->SrcReg[j].Index);
+ }
+ if (inst->DstReg.File == PROGRAM_TEMPORARY)
+ aluTemps |= (1 << inst->DstReg.Index);
+ }
+
+ if ((inst->Opcode != OPCODE_KIL) && (inst->DstReg.File == PROGRAM_TEMPORARY))
+ tempsOutput |= (1 << inst->DstReg.Index);
+ }
+
+ prog->NumTexIndirections = indirections;
}
+
+
+/**
+ * Count number of texture instructions in given program and update the
+ * program's NumTexInstructions field.
+ */
+void
+_mesa_count_texture_instructions(struct gl_program *prog)
+{
+ GLuint i;
+ prog->NumTexInstructions = 0;
+ for (i = 0; i < prog->NumInstructions; i++) {
+ prog->NumTexInstructions += is_texture_instruction(prog->Instructions + i);
+ }
+}
+