2 * Mesa 3-D graphics library
5 * Copyright (C) 1999-2007 Brian Paul All Rights Reserved.
7 * Permission is hereby granted, free of charge, to any person obtaining a
8 * copy of this software and associated documentation files (the "Software"),
9 * to deal in the Software without restriction, including without limitation
10 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
11 * and/or sell copies of the Software, and to permit persons to whom the
12 * Software is furnished to do so, subject to the following conditions:
14 * The above copyright notice and this permission notice shall be included
15 * in all copies or substantial portions of the Software.
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
18 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20 * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
21 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
22 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
27 * Vertex and fragment program support functions.
32 #include "main/glheader.h"
33 #include "main/context.h"
34 #include "main/hash.h"
35 #include "main/mfeatures.h"
37 #include "prog_cache.h"
38 #include "prog_parameter.h"
39 #include "prog_instruction.h"
43 * A pointer to this dummy program is put into the hash table when
44 * glGenPrograms is called.
46 struct gl_program _mesa_DummyProgram;
50 * Init context's vertex/fragment program state
53 _mesa_init_program(struct gl_context *ctx)
58 * If this assertion fails, we need to increase the field
59 * size for register indexes (see INST_INDEX_BITS).
61 ASSERT(ctx->Const.VertexProgram.MaxUniformComponents / 4
62 <= (1 << INST_INDEX_BITS));
63 ASSERT(ctx->Const.FragmentProgram.MaxUniformComponents / 4
64 <= (1 << INST_INDEX_BITS));
66 ASSERT(ctx->Const.VertexProgram.MaxTemps <= (1 << INST_INDEX_BITS));
67 ASSERT(ctx->Const.VertexProgram.MaxLocalParams <= (1 << INST_INDEX_BITS));
68 ASSERT(ctx->Const.FragmentProgram.MaxTemps <= (1 << INST_INDEX_BITS));
69 ASSERT(ctx->Const.FragmentProgram.MaxLocalParams <= (1 << INST_INDEX_BITS));
71 ASSERT(ctx->Const.VertexProgram.MaxUniformComponents <= 4 * MAX_UNIFORMS);
72 ASSERT(ctx->Const.FragmentProgram.MaxUniformComponents <= 4 * MAX_UNIFORMS);
74 ASSERT(ctx->Const.VertexProgram.MaxAddressOffset <= (1 << INST_INDEX_BITS));
75 ASSERT(ctx->Const.FragmentProgram.MaxAddressOffset <= (1 << INST_INDEX_BITS));
77 /* If this fails, increase prog_instruction::TexSrcUnit size */
78 ASSERT(MAX_TEXTURE_UNITS <= (1 << 5));
80 /* If this fails, increase prog_instruction::TexSrcTarget size */
81 ASSERT(NUM_TEXTURE_TARGETS <= (1 << 3));
83 ctx->Program.ErrorPos = -1;
84 ctx->Program.ErrorString = _mesa_strdup("");
86 #if FEATURE_NV_vertex_program || FEATURE_ARB_vertex_program
87 ctx->VertexProgram.Enabled = GL_FALSE;
89 ctx->VertexProgram.PointSizeEnabled =
90 (ctx->API == API_OPENGLES2) ? GL_TRUE : GL_FALSE;
92 ctx->VertexProgram.PointSizeEnabled = GL_FALSE;
94 ctx->VertexProgram.TwoSideEnabled = GL_FALSE;
95 _mesa_reference_vertprog(ctx, &ctx->VertexProgram.Current,
96 ctx->Shared->DefaultVertexProgram);
97 assert(ctx->VertexProgram.Current);
98 for (i = 0; i < MAX_NV_VERTEX_PROGRAM_PARAMS / 4; i++) {
99 ctx->VertexProgram.TrackMatrix[i] = GL_NONE;
100 ctx->VertexProgram.TrackMatrixTransform[i] = GL_IDENTITY_NV;
102 ctx->VertexProgram.Cache = _mesa_new_program_cache();
105 #if FEATURE_NV_fragment_program || FEATURE_ARB_fragment_program
106 ctx->FragmentProgram.Enabled = GL_FALSE;
107 _mesa_reference_fragprog(ctx, &ctx->FragmentProgram.Current,
108 ctx->Shared->DefaultFragmentProgram);
109 assert(ctx->FragmentProgram.Current);
110 ctx->FragmentProgram.Cache = _mesa_new_program_cache();
113 #if FEATURE_ARB_geometry_shader4
114 ctx->GeometryProgram.Enabled = GL_FALSE;
115 /* right now by default we don't have a geometry program */
116 _mesa_reference_geomprog(ctx, &ctx->GeometryProgram.Current,
118 ctx->GeometryProgram.Cache = _mesa_new_program_cache();
121 /* XXX probably move this stuff */
122 #if FEATURE_ATI_fragment_shader
123 ctx->ATIFragmentShader.Enabled = GL_FALSE;
124 ctx->ATIFragmentShader.Current = ctx->Shared->DefaultFragmentShader;
125 assert(ctx->ATIFragmentShader.Current);
126 ctx->ATIFragmentShader.Current->RefCount++;
132 * Free a context's vertex/fragment program state
135 _mesa_free_program_data(struct gl_context *ctx)
137 #if FEATURE_NV_vertex_program || FEATURE_ARB_vertex_program
138 _mesa_reference_vertprog(ctx, &ctx->VertexProgram.Current, NULL);
139 _mesa_delete_program_cache(ctx, ctx->VertexProgram.Cache);
141 #if FEATURE_NV_fragment_program || FEATURE_ARB_fragment_program
142 _mesa_reference_fragprog(ctx, &ctx->FragmentProgram.Current, NULL);
143 _mesa_delete_program_cache(ctx, ctx->FragmentProgram.Cache);
145 #if FEATURE_ARB_geometry_shader4
146 _mesa_reference_geomprog(ctx, &ctx->GeometryProgram.Current, NULL);
147 _mesa_delete_program_cache(ctx, ctx->GeometryProgram.Cache);
149 /* XXX probably move this stuff */
150 #if FEATURE_ATI_fragment_shader
151 if (ctx->ATIFragmentShader.Current) {
152 ctx->ATIFragmentShader.Current->RefCount--;
153 if (ctx->ATIFragmentShader.Current->RefCount <= 0) {
154 free(ctx->ATIFragmentShader.Current);
158 free((void *) ctx->Program.ErrorString);
163 * Update the default program objects in the given context to reference those
164 * specified in the shared state and release those referencing the old
168 _mesa_update_default_objects_program(struct gl_context *ctx)
170 #if FEATURE_NV_vertex_program || FEATURE_ARB_vertex_program
171 _mesa_reference_vertprog(ctx, &ctx->VertexProgram.Current,
172 (struct gl_vertex_program *)
173 ctx->Shared->DefaultVertexProgram);
174 assert(ctx->VertexProgram.Current);
177 #if FEATURE_NV_fragment_program || FEATURE_ARB_fragment_program
178 _mesa_reference_fragprog(ctx, &ctx->FragmentProgram.Current,
179 (struct gl_fragment_program *)
180 ctx->Shared->DefaultFragmentProgram);
181 assert(ctx->FragmentProgram.Current);
184 #if FEATURE_ARB_geometry_shader4
185 _mesa_reference_geomprog(ctx, &ctx->GeometryProgram.Current,
186 (struct gl_geometry_program *)
187 ctx->Shared->DefaultGeometryProgram);
190 /* XXX probably move this stuff */
191 #if FEATURE_ATI_fragment_shader
192 if (ctx->ATIFragmentShader.Current) {
193 ctx->ATIFragmentShader.Current->RefCount--;
194 if (ctx->ATIFragmentShader.Current->RefCount <= 0) {
195 free(ctx->ATIFragmentShader.Current);
198 ctx->ATIFragmentShader.Current = (struct ati_fragment_shader *) ctx->Shared->DefaultFragmentShader;
199 assert(ctx->ATIFragmentShader.Current);
200 ctx->ATIFragmentShader.Current->RefCount++;
206 * Set the vertex/fragment program error state (position and error string).
207 * This is generally called from within the parsers.
210 _mesa_set_program_error(struct gl_context *ctx, GLint pos, const char *string)
212 ctx->Program.ErrorPos = pos;
213 free((void *) ctx->Program.ErrorString);
216 ctx->Program.ErrorString = _mesa_strdup(string);
221 * Find the line number and column for 'pos' within 'string'.
222 * Return a copy of the line which contains 'pos'. Free the line with
224 * \param string the program string
225 * \param pos the position within the string
226 * \param line returns the line number corresponding to 'pos'.
227 * \param col returns the column number corresponding to 'pos'.
228 * \return copy of the line containing 'pos'.
231 _mesa_find_line_column(const GLubyte *string, const GLubyte *pos,
232 GLint *line, GLint *col)
234 const GLubyte *lineStart = string;
235 const GLubyte *p = string;
242 if (*p == (GLubyte) '\n') {
249 *col = (pos - lineStart) + 1;
251 /* return copy of this line */
252 while (*p != 0 && *p != '\n')
255 s = (GLubyte *) malloc(len + 1);
256 memcpy(s, lineStart, len);
264 * Initialize a new vertex/fragment program object.
266 static struct gl_program *
267 _mesa_init_program_struct( struct gl_context *ctx, struct gl_program *prog,
268 GLenum target, GLuint id)
273 memset(prog, 0, sizeof(*prog));
275 prog->Target = target;
276 prog->Resident = GL_TRUE;
278 prog->Format = GL_PROGRAM_FORMAT_ASCII_ARB;
280 /* default mapping from samplers to texture units */
281 for (i = 0; i < MAX_SAMPLERS; i++)
282 prog->SamplerUnits[i] = i;
290 * Initialize a new fragment program object.
293 _mesa_init_fragment_program( struct gl_context *ctx, struct gl_fragment_program *prog,
294 GLenum target, GLuint id)
297 return _mesa_init_program_struct( ctx, &prog->Base, target, id );
304 * Initialize a new vertex program object.
307 _mesa_init_vertex_program( struct gl_context *ctx, struct gl_vertex_program *prog,
308 GLenum target, GLuint id)
311 return _mesa_init_program_struct( ctx, &prog->Base, target, id );
318 * Initialize a new geometry program object.
321 _mesa_init_geometry_program( struct gl_context *ctx, struct gl_geometry_program *prog,
322 GLenum target, GLuint id)
325 return _mesa_init_program_struct( ctx, &prog->Base, target, id );
332 * Allocate and initialize a new fragment/vertex program object but
333 * don't put it into the program hash table. Called via
334 * ctx->Driver.NewProgram. May be overridden (ie. replaced) by a
335 * device driver function to implement OO deriviation with additional
336 * types not understood by this function.
339 * \param id program id/number
340 * \param target program target/type
341 * \return pointer to new program object
344 _mesa_new_program(struct gl_context *ctx, GLenum target, GLuint id)
346 struct gl_program *prog;
348 case GL_VERTEX_PROGRAM_ARB: /* == GL_VERTEX_PROGRAM_NV */
349 case GL_VERTEX_STATE_PROGRAM_NV:
350 prog = _mesa_init_vertex_program(ctx, CALLOC_STRUCT(gl_vertex_program),
353 case GL_FRAGMENT_PROGRAM_NV:
354 case GL_FRAGMENT_PROGRAM_ARB:
355 prog =_mesa_init_fragment_program(ctx,
356 CALLOC_STRUCT(gl_fragment_program),
359 case MESA_GEOMETRY_PROGRAM:
360 prog = _mesa_init_geometry_program(ctx,
361 CALLOC_STRUCT(gl_geometry_program),
365 _mesa_problem(ctx, "bad target in _mesa_new_program");
373 * Delete a program and remove it from the hash table, ignoring the
375 * Called via ctx->Driver.DeleteProgram. May be wrapped (OO deriviation)
376 * by a device driver function.
379 _mesa_delete_program(struct gl_context *ctx, struct gl_program *prog)
383 ASSERT(prog->RefCount==0);
385 if (prog == &_mesa_DummyProgram)
391 _mesa_free_instructions(prog->Instructions, prog->NumInstructions);
393 if (prog->Parameters) {
394 _mesa_free_parameter_list(prog->Parameters);
397 _mesa_free_parameter_list(prog->Varying);
399 if (prog->Attributes) {
400 _mesa_free_parameter_list(prog->Attributes);
408 * Return the gl_program object for a given ID.
409 * Basically just a wrapper for _mesa_HashLookup() to avoid a lot of
413 _mesa_lookup_program(struct gl_context *ctx, GLuint id)
416 return (struct gl_program *) _mesa_HashLookup(ctx->Shared->Programs, id);
423 * Reference counting for vertex/fragment programs
426 _mesa_reference_program(struct gl_context *ctx,
427 struct gl_program **ptr,
428 struct gl_program *prog)
433 if ((*ptr)->Target == GL_VERTEX_PROGRAM_ARB)
434 ASSERT(prog->Target == GL_VERTEX_PROGRAM_ARB);
435 else if ((*ptr)->Target == GL_FRAGMENT_PROGRAM_ARB)
436 ASSERT(prog->Target == GL_FRAGMENT_PROGRAM_ARB ||
437 prog->Target == GL_FRAGMENT_PROGRAM_NV);
438 else if ((*ptr)->Target == MESA_GEOMETRY_PROGRAM)
439 ASSERT(prog->Target == MESA_GEOMETRY_PROGRAM);
442 return; /* no change */
445 GLboolean deleteFlag;
447 /*_glthread_LOCK_MUTEX((*ptr)->Mutex);*/
449 printf("Program %p ID=%u Target=%s Refcount-- to %d\n",
451 ((*ptr)->Target == GL_VERTEX_PROGRAM_ARB ? "VP" :
452 ((*ptr)->Target == MESA_GEOMETRY_PROGRAM ? "GP" : "FP")),
453 (*ptr)->RefCount - 1);
455 ASSERT((*ptr)->RefCount > 0);
458 deleteFlag = ((*ptr)->RefCount == 0);
459 /*_glthread_UNLOCK_MUTEX((*ptr)->Mutex);*/
463 ctx->Driver.DeleteProgram(ctx, *ptr);
471 /*_glthread_LOCK_MUTEX(prog->Mutex);*/
474 printf("Program %p ID=%u Target=%s Refcount++ to %d\n",
476 (prog->Target == GL_VERTEX_PROGRAM_ARB ? "VP" :
477 (prog->Target == MESA_GEOMETRY_PROGRAM ? "GP" : "FP")),
480 /*_glthread_UNLOCK_MUTEX(prog->Mutex);*/
488 * Return a copy of a program.
489 * XXX Problem here if the program object is actually OO-derivation
490 * made by a device driver.
493 _mesa_clone_program(struct gl_context *ctx, const struct gl_program *prog)
495 struct gl_program *clone;
497 clone = ctx->Driver.NewProgram(ctx, prog->Target, prog->Id);
501 assert(clone->Target == prog->Target);
502 assert(clone->RefCount == 1);
504 clone->String = (GLubyte *) _mesa_strdup((char *) prog->String);
505 clone->Format = prog->Format;
506 clone->Instructions = _mesa_alloc_instructions(prog->NumInstructions);
507 if (!clone->Instructions) {
508 _mesa_reference_program(ctx, &clone, NULL);
511 _mesa_copy_instructions(clone->Instructions, prog->Instructions,
512 prog->NumInstructions);
513 clone->InputsRead = prog->InputsRead;
514 clone->OutputsWritten = prog->OutputsWritten;
515 clone->SamplersUsed = prog->SamplersUsed;
516 clone->ShadowSamplers = prog->ShadowSamplers;
517 memcpy(clone->TexturesUsed, prog->TexturesUsed, sizeof(prog->TexturesUsed));
519 if (prog->Parameters)
520 clone->Parameters = _mesa_clone_parameter_list(prog->Parameters);
521 memcpy(clone->LocalParams, prog->LocalParams, sizeof(clone->LocalParams));
523 clone->Varying = _mesa_clone_parameter_list(prog->Varying);
524 if (prog->Attributes)
525 clone->Attributes = _mesa_clone_parameter_list(prog->Attributes);
526 memcpy(clone->LocalParams, prog->LocalParams, sizeof(clone->LocalParams));
527 clone->IndirectRegisterFiles = prog->IndirectRegisterFiles;
528 clone->NumInstructions = prog->NumInstructions;
529 clone->NumTemporaries = prog->NumTemporaries;
530 clone->NumParameters = prog->NumParameters;
531 clone->NumAttributes = prog->NumAttributes;
532 clone->NumAddressRegs = prog->NumAddressRegs;
533 clone->NumNativeInstructions = prog->NumNativeInstructions;
534 clone->NumNativeTemporaries = prog->NumNativeTemporaries;
535 clone->NumNativeParameters = prog->NumNativeParameters;
536 clone->NumNativeAttributes = prog->NumNativeAttributes;
537 clone->NumNativeAddressRegs = prog->NumNativeAddressRegs;
538 clone->NumAluInstructions = prog->NumAluInstructions;
539 clone->NumTexInstructions = prog->NumTexInstructions;
540 clone->NumTexIndirections = prog->NumTexIndirections;
541 clone->NumNativeAluInstructions = prog->NumNativeAluInstructions;
542 clone->NumNativeTexInstructions = prog->NumNativeTexInstructions;
543 clone->NumNativeTexIndirections = prog->NumNativeTexIndirections;
545 switch (prog->Target) {
546 case GL_VERTEX_PROGRAM_ARB:
548 const struct gl_vertex_program *vp
549 = (const struct gl_vertex_program *) prog;
550 struct gl_vertex_program *vpc = (struct gl_vertex_program *) clone;
551 vpc->IsPositionInvariant = vp->IsPositionInvariant;
552 vpc->IsNVProgram = vp->IsNVProgram;
555 case GL_FRAGMENT_PROGRAM_ARB:
557 const struct gl_fragment_program *fp
558 = (const struct gl_fragment_program *) prog;
559 struct gl_fragment_program *fpc = (struct gl_fragment_program *) clone;
560 fpc->UsesKill = fp->UsesKill;
561 fpc->OriginUpperLeft = fp->OriginUpperLeft;
562 fpc->PixelCenterInteger = fp->PixelCenterInteger;
565 case MESA_GEOMETRY_PROGRAM:
567 const struct gl_geometry_program *gp
568 = (const struct gl_geometry_program *) prog;
569 struct gl_geometry_program *gpc = (struct gl_geometry_program *) clone;
570 gpc->VerticesOut = gp->VerticesOut;
571 gpc->InputType = gp->InputType;
572 gpc->OutputType = gp->OutputType;
576 _mesa_problem(NULL, "Unexpected target in _mesa_clone_program");
584 * Insert 'count' NOP instructions at 'start' in the given program.
585 * Adjust branch targets accordingly.
588 _mesa_insert_instructions(struct gl_program *prog, GLuint start, GLuint count)
590 const GLuint origLen = prog->NumInstructions;
591 const GLuint newLen = origLen + count;
592 struct prog_instruction *newInst;
595 /* adjust branches */
596 for (i = 0; i < prog->NumInstructions; i++) {
597 struct prog_instruction *inst = prog->Instructions + i;
598 if (inst->BranchTarget > 0) {
599 if ((GLuint)inst->BranchTarget >= start) {
600 inst->BranchTarget += count;
605 /* Alloc storage for new instructions */
606 newInst = _mesa_alloc_instructions(newLen);
611 /* Copy 'start' instructions into new instruction buffer */
612 _mesa_copy_instructions(newInst, prog->Instructions, start);
614 /* init the new instructions */
615 _mesa_init_instructions(newInst + start, count);
617 /* Copy the remaining/tail instructions to new inst buffer */
618 _mesa_copy_instructions(newInst + start + count,
619 prog->Instructions + start,
622 /* free old instructions */
623 _mesa_free_instructions(prog->Instructions, origLen);
625 /* install new instructions */
626 prog->Instructions = newInst;
627 prog->NumInstructions = newLen;
633 * Delete 'count' instructions at 'start' in the given program.
634 * Adjust branch targets accordingly.
637 _mesa_delete_instructions(struct gl_program *prog, GLuint start, GLuint count)
639 const GLuint origLen = prog->NumInstructions;
640 const GLuint newLen = origLen - count;
641 struct prog_instruction *newInst;
644 /* adjust branches */
645 for (i = 0; i < prog->NumInstructions; i++) {
646 struct prog_instruction *inst = prog->Instructions + i;
647 if (inst->BranchTarget > 0) {
648 if (inst->BranchTarget > (GLint) start) {
649 inst->BranchTarget -= count;
654 /* Alloc storage for new instructions */
655 newInst = _mesa_alloc_instructions(newLen);
660 /* Copy 'start' instructions into new instruction buffer */
661 _mesa_copy_instructions(newInst, prog->Instructions, start);
663 /* Copy the remaining/tail instructions to new inst buffer */
664 _mesa_copy_instructions(newInst + start,
665 prog->Instructions + start + count,
668 /* free old instructions */
669 _mesa_free_instructions(prog->Instructions, origLen);
671 /* install new instructions */
672 prog->Instructions = newInst;
673 prog->NumInstructions = newLen;
680 * Search instructions for registers that match (oldFile, oldIndex),
681 * replacing them with (newFile, newIndex).
684 replace_registers(struct prog_instruction *inst, GLuint numInst,
685 GLuint oldFile, GLuint oldIndex,
686 GLuint newFile, GLuint newIndex)
689 for (i = 0; i < numInst; i++) {
691 for (j = 0; j < _mesa_num_inst_src_regs(inst[i].Opcode); j++) {
692 if (inst[i].SrcReg[j].File == oldFile &&
693 inst[i].SrcReg[j].Index == oldIndex) {
694 inst[i].SrcReg[j].File = newFile;
695 inst[i].SrcReg[j].Index = newIndex;
699 if (inst[i].DstReg.File == oldFile && inst[i].DstReg.Index == oldIndex) {
700 inst[i].DstReg.File = newFile;
701 inst[i].DstReg.Index = newIndex;
708 * Search instructions for references to program parameters. When found,
709 * increment the parameter index by 'offset'.
710 * Used when combining programs.
713 adjust_param_indexes(struct prog_instruction *inst, GLuint numInst,
717 for (i = 0; i < numInst; i++) {
718 for (j = 0; j < _mesa_num_inst_src_regs(inst[i].Opcode); j++) {
719 GLuint f = inst[i].SrcReg[j].File;
720 if (f == PROGRAM_CONSTANT ||
721 f == PROGRAM_UNIFORM ||
722 f == PROGRAM_STATE_VAR) {
723 inst[i].SrcReg[j].Index += offset;
731 * Combine two programs into one. Fix instructions so the outputs of
732 * the first program go to the inputs of the second program.
735 _mesa_combine_programs(struct gl_context *ctx,
736 const struct gl_program *progA,
737 const struct gl_program *progB)
739 struct prog_instruction *newInst;
740 struct gl_program *newProg;
741 const GLuint lenA = progA->NumInstructions - 1; /* omit END instr */
742 const GLuint lenB = progB->NumInstructions;
743 const GLuint numParamsA = _mesa_num_parameters(progA->Parameters);
744 const GLuint newLength = lenA + lenB;
745 GLboolean usedTemps[MAX_PROGRAM_TEMPS];
746 GLuint firstTemp = 0;
750 ASSERT(progA->Target == progB->Target);
752 newInst = _mesa_alloc_instructions(newLength);
756 _mesa_copy_instructions(newInst, progA->Instructions, lenA);
757 _mesa_copy_instructions(newInst + lenA, progB->Instructions, lenB);
759 /* adjust branch / instruction addresses for B's instructions */
760 for (i = 0; i < lenB; i++) {
761 newInst[lenA + i].BranchTarget += lenA;
764 newProg = ctx->Driver.NewProgram(ctx, progA->Target, 0);
765 newProg->Instructions = newInst;
766 newProg->NumInstructions = newLength;
768 /* find used temp regs (we may need new temps below) */
769 _mesa_find_used_registers(newProg, PROGRAM_TEMPORARY,
770 usedTemps, MAX_PROGRAM_TEMPS);
772 if (newProg->Target == GL_FRAGMENT_PROGRAM_ARB) {
773 struct gl_fragment_program *fprogA, *fprogB, *newFprog;
774 GLbitfield progB_inputsRead = progB->InputsRead;
775 GLint progB_colorFile, progB_colorIndex;
777 fprogA = (struct gl_fragment_program *) progA;
778 fprogB = (struct gl_fragment_program *) progB;
779 newFprog = (struct gl_fragment_program *) newProg;
781 newFprog->UsesKill = fprogA->UsesKill || fprogB->UsesKill;
783 /* We'll do a search and replace for instances
784 * of progB_colorFile/progB_colorIndex below...
786 progB_colorFile = PROGRAM_INPUT;
787 progB_colorIndex = FRAG_ATTRIB_COL0;
790 * The fragment program may get color from a state var rather than
791 * a fragment input (vertex output) if it's constant.
792 * See the texenvprogram.c code.
793 * So, search the program's parameter list now to see if the program
794 * gets color from a state var instead of a conventional fragment
797 for (i = 0; i < progB->Parameters->NumParameters; i++) {
798 struct gl_program_parameter *p = &progB->Parameters->Parameters[i];
799 if (p->Type == PROGRAM_STATE_VAR &&
800 p->StateIndexes[0] == STATE_INTERNAL &&
801 p->StateIndexes[1] == STATE_CURRENT_ATTRIB &&
802 (int) p->StateIndexes[2] == (int) VERT_ATTRIB_COLOR0) {
803 progB_inputsRead |= FRAG_BIT_COL0;
804 progB_colorFile = PROGRAM_STATE_VAR;
805 progB_colorIndex = i;
810 /* Connect color outputs of fprogA to color inputs of fprogB, via a
811 * new temporary register.
813 if ((progA->OutputsWritten & BITFIELD64_BIT(FRAG_RESULT_COLOR)) &&
814 (progB_inputsRead & FRAG_BIT_COL0)) {
815 GLint tempReg = _mesa_find_free_register(usedTemps, MAX_PROGRAM_TEMPS,
818 _mesa_problem(ctx, "No free temp regs found in "
819 "_mesa_combine_programs(), using 31");
822 firstTemp = tempReg + 1;
824 /* replace writes to result.color[0] with tempReg */
825 replace_registers(newInst, lenA,
826 PROGRAM_OUTPUT, FRAG_RESULT_COLOR,
827 PROGRAM_TEMPORARY, tempReg);
828 /* replace reads from the input color with tempReg */
829 replace_registers(newInst + lenA, lenB,
830 progB_colorFile, progB_colorIndex, /* search for */
831 PROGRAM_TEMPORARY, tempReg /* replace with */ );
834 /* compute combined program's InputsRead */
835 inputsB = progB_inputsRead;
836 if (progA->OutputsWritten & BITFIELD64_BIT(FRAG_RESULT_COLOR)) {
837 inputsB &= ~(1 << FRAG_ATTRIB_COL0);
839 newProg->InputsRead = progA->InputsRead | inputsB;
840 newProg->OutputsWritten = progB->OutputsWritten;
841 newProg->SamplersUsed = progA->SamplersUsed | progB->SamplersUsed;
845 assert(0); /* XXX todo */
849 * Merge parameters (uniforms, constants, etc)
851 newProg->Parameters = _mesa_combine_parameter_lists(progA->Parameters,
854 adjust_param_indexes(newInst + lenA, lenB, numParamsA);
862 * Populate the 'used' array with flags indicating which registers (TEMPs,
863 * INPUTs, OUTPUTs, etc, are used by the given program.
864 * \param file type of register to scan for
865 * \param used returns true/false flags for in use / free
866 * \param usedSize size of the 'used' array
869 _mesa_find_used_registers(const struct gl_program *prog,
870 gl_register_file file,
871 GLboolean used[], GLuint usedSize)
875 memset(used, 0, usedSize);
877 for (i = 0; i < prog->NumInstructions; i++) {
878 const struct prog_instruction *inst = prog->Instructions + i;
879 const GLuint n = _mesa_num_inst_src_regs(inst->Opcode);
881 if (inst->DstReg.File == file) {
882 ASSERT(inst->DstReg.Index < usedSize);
883 if(inst->DstReg.Index < usedSize)
884 used[inst->DstReg.Index] = GL_TRUE;
887 for (j = 0; j < n; j++) {
888 if (inst->SrcReg[j].File == file) {
889 ASSERT(inst->SrcReg[j].Index < usedSize);
890 if(inst->SrcReg[j].Index < usedSize)
891 used[inst->SrcReg[j].Index] = GL_TRUE;
899 * Scan the given 'used' register flag array for the first entry
900 * that's >= firstReg.
901 * \param used vector of flags indicating registers in use (as returned
902 * by _mesa_find_used_registers())
903 * \param usedSize size of the 'used' array
904 * \param firstReg first register to start searching at
905 * \return index of unused register, or -1 if none.
908 _mesa_find_free_register(const GLboolean used[],
909 GLuint usedSize, GLuint firstReg)
913 assert(firstReg < usedSize);
915 for (i = firstReg; i < usedSize; i++)
925 * Check if the given register index is valid (doesn't exceed implementation-
927 * \return GL_TRUE if OK, GL_FALSE if bad index
930 _mesa_valid_register_index(const struct gl_context *ctx,
931 gl_shader_type shaderType,
932 gl_register_file file, GLint index)
934 const struct gl_program_constants *c;
936 switch (shaderType) {
937 case MESA_SHADER_VERTEX:
938 c = &ctx->Const.VertexProgram;
940 case MESA_SHADER_FRAGMENT:
941 c = &ctx->Const.FragmentProgram;
943 case MESA_SHADER_GEOMETRY:
944 c = &ctx->Const.GeometryProgram;
948 "unexpected shader type in _mesa_valid_register_index()");
953 case PROGRAM_UNDEFINED:
954 return GL_TRUE; /* XXX or maybe false? */
956 case PROGRAM_TEMPORARY:
957 return index >= 0 && index < c->MaxTemps;
959 case PROGRAM_ENV_PARAM:
960 return index >= 0 && index < c->MaxEnvParams;
962 case PROGRAM_LOCAL_PARAM:
963 return index >= 0 && index < c->MaxLocalParams;
965 case PROGRAM_NAMED_PARAM:
966 return index >= 0 && index < c->MaxParameters;
968 case PROGRAM_UNIFORM:
969 case PROGRAM_STATE_VAR:
970 /* aka constant buffer */
971 return index >= 0 && index < c->MaxUniformComponents / 4;
973 case PROGRAM_CONSTANT:
974 /* constant buffer w/ possible relative negative addressing */
975 return (index > (int) c->MaxUniformComponents / -4 &&
976 index < c->MaxUniformComponents / 4);
982 switch (shaderType) {
983 case MESA_SHADER_VERTEX:
984 return index < VERT_ATTRIB_GENERIC0 + c->MaxAttribs;
985 case MESA_SHADER_FRAGMENT:
986 return index < FRAG_ATTRIB_VAR0 + ctx->Const.MaxVarying;
987 case MESA_SHADER_GEOMETRY:
988 return index < GEOM_ATTRIB_VAR0 + ctx->Const.MaxVarying;
997 switch (shaderType) {
998 case MESA_SHADER_VERTEX:
999 return index < VERT_RESULT_VAR0 + ctx->Const.MaxVarying;
1000 case MESA_SHADER_FRAGMENT:
1001 return index < FRAG_RESULT_DATA0 + ctx->Const.MaxDrawBuffers;
1002 case MESA_SHADER_GEOMETRY:
1003 return index < GEOM_RESULT_VAR0 + ctx->Const.MaxVarying;
1008 case PROGRAM_ADDRESS:
1009 return index >= 0 && index < c->MaxAddressRegs;
1013 "unexpected register file in _mesa_valid_register_index()");
1021 * "Post-process" a GPU program. This is intended to be used for debugging.
1022 * Example actions include no-op'ing instructions or changing instruction
1026 _mesa_postprocess_program(struct gl_context *ctx, struct gl_program *prog)
1028 static const GLfloat white[4] = { 0.5, 0.5, 0.5, 0.5 };
1030 GLuint whiteSwizzle;
1031 GLint whiteIndex = _mesa_add_unnamed_constant(prog->Parameters,
1032 white, 4, &whiteSwizzle);
1036 for (i = 0; i < prog->NumInstructions; i++) {
1037 struct prog_instruction *inst = prog->Instructions + i;
1038 const GLuint n = _mesa_num_inst_src_regs(inst->Opcode);
1042 if (_mesa_is_tex_instruction(inst->Opcode)) {
1044 /* replace TEX/TXP/TXB with MOV */
1045 inst->Opcode = OPCODE_MOV;
1046 inst->DstReg.WriteMask = WRITEMASK_XYZW;
1047 inst->SrcReg[0].Swizzle = SWIZZLE_XYZW;
1048 inst->SrcReg[0].Negate = NEGATE_NONE;
1052 /* disable shadow texture mode */
1053 inst->TexShadow = 0;
1057 if (inst->Opcode == OPCODE_TXP) {
1059 inst->Opcode = OPCODE_MOV;
1060 inst->DstReg.WriteMask = WRITEMASK_XYZW;
1061 inst->SrcReg[0].File = PROGRAM_CONSTANT;
1062 inst->SrcReg[0].Index = whiteIndex;
1063 inst->SrcReg[0].Swizzle = SWIZZLE_XYZW;
1064 inst->SrcReg[0].Negate = NEGATE_NONE;
1067 inst->TexShadow = 0;
1070 inst->Opcode = OPCODE_TEX;
1071 inst->TexShadow = 0;