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"
36 #include "prog_cache.h"
37 #include "prog_parameter.h"
38 #include "prog_instruction.h"
42 * A pointer to this dummy program is put into the hash table when
43 * glGenPrograms is called.
45 struct gl_program _mesa_DummyProgram
;
49 * Init context's vertex/fragment program state
52 _mesa_init_program(GLcontext
*ctx
)
56 ctx
->Program
.ErrorPos
= -1;
57 ctx
->Program
.ErrorString
= _mesa_strdup("");
59 #if FEATURE_NV_vertex_program || FEATURE_ARB_vertex_program
60 ctx
->VertexProgram
.Enabled
= GL_FALSE
;
62 ctx
->VertexProgram
.PointSizeEnabled
= GL_TRUE
;
64 ctx
->VertexProgram
.PointSizeEnabled
= GL_FALSE
;
66 ctx
->VertexProgram
.TwoSideEnabled
= GL_FALSE
;
67 _mesa_reference_vertprog(ctx
, &ctx
->VertexProgram
.Current
,
68 ctx
->Shared
->DefaultVertexProgram
);
69 assert(ctx
->VertexProgram
.Current
);
70 for (i
= 0; i
< MAX_NV_VERTEX_PROGRAM_PARAMS
/ 4; i
++) {
71 ctx
->VertexProgram
.TrackMatrix
[i
] = GL_NONE
;
72 ctx
->VertexProgram
.TrackMatrixTransform
[i
] = GL_IDENTITY_NV
;
74 ctx
->VertexProgram
.Cache
= _mesa_new_program_cache();
77 #if FEATURE_NV_fragment_program || FEATURE_ARB_fragment_program
78 ctx
->FragmentProgram
.Enabled
= GL_FALSE
;
79 _mesa_reference_fragprog(ctx
, &ctx
->FragmentProgram
.Current
,
80 ctx
->Shared
->DefaultFragmentProgram
);
81 assert(ctx
->FragmentProgram
.Current
);
82 ctx
->FragmentProgram
.Cache
= _mesa_new_program_cache();
86 /* XXX probably move this stuff */
87 #if FEATURE_ATI_fragment_shader
88 ctx
->ATIFragmentShader
.Enabled
= GL_FALSE
;
89 ctx
->ATIFragmentShader
.Current
= ctx
->Shared
->DefaultFragmentShader
;
90 assert(ctx
->ATIFragmentShader
.Current
);
91 ctx
->ATIFragmentShader
.Current
->RefCount
++;
97 * Free a context's vertex/fragment program state
100 _mesa_free_program_data(GLcontext
*ctx
)
102 #if FEATURE_NV_vertex_program || FEATURE_ARB_vertex_program
103 _mesa_reference_vertprog(ctx
, &ctx
->VertexProgram
.Current
, NULL
);
104 _mesa_delete_program_cache(ctx
, ctx
->VertexProgram
.Cache
);
106 #if FEATURE_NV_fragment_program || FEATURE_ARB_fragment_program
107 _mesa_reference_fragprog(ctx
, &ctx
->FragmentProgram
.Current
, NULL
);
108 _mesa_delete_program_cache(ctx
, ctx
->FragmentProgram
.Cache
);
110 /* XXX probably move this stuff */
111 #if FEATURE_ATI_fragment_shader
112 if (ctx
->ATIFragmentShader
.Current
) {
113 ctx
->ATIFragmentShader
.Current
->RefCount
--;
114 if (ctx
->ATIFragmentShader
.Current
->RefCount
<= 0) {
115 _mesa_free(ctx
->ATIFragmentShader
.Current
);
119 _mesa_free((void *) ctx
->Program
.ErrorString
);
124 * Update the default program objects in the given context to reference those
125 * specified in the shared state and release those referencing the old
129 _mesa_update_default_objects_program(GLcontext
*ctx
)
131 #if FEATURE_NV_vertex_program || FEATURE_ARB_vertex_program
132 _mesa_reference_vertprog(ctx
, &ctx
->VertexProgram
.Current
,
133 (struct gl_vertex_program
*)
134 ctx
->Shared
->DefaultVertexProgram
);
135 assert(ctx
->VertexProgram
.Current
);
138 #if FEATURE_NV_fragment_program || FEATURE_ARB_fragment_program
139 _mesa_reference_fragprog(ctx
, &ctx
->FragmentProgram
.Current
,
140 (struct gl_fragment_program
*)
141 ctx
->Shared
->DefaultFragmentProgram
);
142 assert(ctx
->FragmentProgram
.Current
);
145 /* XXX probably move this stuff */
146 #if FEATURE_ATI_fragment_shader
147 if (ctx
->ATIFragmentShader
.Current
) {
148 ctx
->ATIFragmentShader
.Current
->RefCount
--;
149 if (ctx
->ATIFragmentShader
.Current
->RefCount
<= 0) {
150 _mesa_free(ctx
->ATIFragmentShader
.Current
);
153 ctx
->ATIFragmentShader
.Current
= (struct ati_fragment_shader
*) ctx
->Shared
->DefaultFragmentShader
;
154 assert(ctx
->ATIFragmentShader
.Current
);
155 ctx
->ATIFragmentShader
.Current
->RefCount
++;
161 * Set the vertex/fragment program error state (position and error string).
162 * This is generally called from within the parsers.
165 _mesa_set_program_error(GLcontext
*ctx
, GLint pos
, const char *string
)
167 ctx
->Program
.ErrorPos
= pos
;
168 _mesa_free((void *) ctx
->Program
.ErrorString
);
171 ctx
->Program
.ErrorString
= _mesa_strdup(string
);
176 * Find the line number and column for 'pos' within 'string'.
177 * Return a copy of the line which contains 'pos'. Free the line with
179 * \param string the program string
180 * \param pos the position within the string
181 * \param line returns the line number corresponding to 'pos'.
182 * \param col returns the column number corresponding to 'pos'.
183 * \return copy of the line containing 'pos'.
186 _mesa_find_line_column(const GLubyte
*string
, const GLubyte
*pos
,
187 GLint
*line
, GLint
*col
)
189 const GLubyte
*lineStart
= string
;
190 const GLubyte
*p
= string
;
197 if (*p
== (GLubyte
) '\n') {
204 *col
= (pos
- lineStart
) + 1;
206 /* return copy of this line */
207 while (*p
!= 0 && *p
!= '\n')
210 s
= (GLubyte
*) _mesa_malloc(len
+ 1);
211 _mesa_memcpy(s
, lineStart
, len
);
219 * Initialize a new vertex/fragment program object.
221 static struct gl_program
*
222 _mesa_init_program_struct( GLcontext
*ctx
, struct gl_program
*prog
,
223 GLenum target
, GLuint id
)
228 _mesa_bzero(prog
, sizeof(*prog
));
230 prog
->Target
= target
;
231 prog
->Resident
= GL_TRUE
;
233 prog
->Format
= GL_PROGRAM_FORMAT_ASCII_ARB
;
235 /* default mapping from samplers to texture units */
236 for (i
= 0; i
< MAX_SAMPLERS
; i
++)
237 prog
->SamplerUnits
[i
] = i
;
245 * Initialize a new fragment program object.
248 _mesa_init_fragment_program( GLcontext
*ctx
, struct gl_fragment_program
*prog
,
249 GLenum target
, GLuint id
)
252 return _mesa_init_program_struct( ctx
, &prog
->Base
, target
, id
);
259 * Initialize a new vertex program object.
262 _mesa_init_vertex_program( GLcontext
*ctx
, struct gl_vertex_program
*prog
,
263 GLenum target
, GLuint id
)
266 return _mesa_init_program_struct( ctx
, &prog
->Base
, target
, id
);
273 * Allocate and initialize a new fragment/vertex program object but
274 * don't put it into the program hash table. Called via
275 * ctx->Driver.NewProgram. May be overridden (ie. replaced) by a
276 * device driver function to implement OO deriviation with additional
277 * types not understood by this function.
280 * \param id program id/number
281 * \param target program target/type
282 * \return pointer to new program object
285 _mesa_new_program(GLcontext
*ctx
, GLenum target
, GLuint id
)
287 struct gl_program
*prog
;
289 case GL_VERTEX_PROGRAM_ARB
: /* == GL_VERTEX_PROGRAM_NV */
290 prog
= _mesa_init_vertex_program(ctx
, CALLOC_STRUCT(gl_vertex_program
),
293 case GL_FRAGMENT_PROGRAM_NV
:
294 case GL_FRAGMENT_PROGRAM_ARB
:
295 prog
=_mesa_init_fragment_program(ctx
,
296 CALLOC_STRUCT(gl_fragment_program
),
300 _mesa_problem(ctx
, "bad target in _mesa_new_program");
308 * Delete a program and remove it from the hash table, ignoring the
310 * Called via ctx->Driver.DeleteProgram. May be wrapped (OO deriviation)
311 * by a device driver function.
314 _mesa_delete_program(GLcontext
*ctx
, struct gl_program
*prog
)
318 ASSERT(prog
->RefCount
==0);
320 if (prog
== &_mesa_DummyProgram
)
324 _mesa_free(prog
->String
);
326 _mesa_free_instructions(prog
->Instructions
, prog
->NumInstructions
);
328 if (prog
->Parameters
) {
329 _mesa_free_parameter_list(prog
->Parameters
);
332 _mesa_free_parameter_list(prog
->Varying
);
334 if (prog
->Attributes
) {
335 _mesa_free_parameter_list(prog
->Attributes
);
338 /* XXX this is a little ugly */
339 if (prog
->Target
== GL_VERTEX_PROGRAM_ARB
) {
340 struct gl_vertex_program
*vprog
= (struct gl_vertex_program
*) prog
;
342 _mesa_free(vprog
->TnlData
);
350 * Return the gl_program object for a given ID.
351 * Basically just a wrapper for _mesa_HashLookup() to avoid a lot of
355 _mesa_lookup_program(GLcontext
*ctx
, GLuint id
)
358 return (struct gl_program
*) _mesa_HashLookup(ctx
->Shared
->Programs
, id
);
365 * Reference counting for vertex/fragment programs
368 _mesa_reference_program(GLcontext
*ctx
,
369 struct gl_program
**ptr
,
370 struct gl_program
*prog
)
375 ASSERT((*ptr
)->Target
== prog
->Target
);
378 return; /* no change */
381 GLboolean deleteFlag
;
383 /*_glthread_LOCK_MUTEX((*ptr)->Mutex);*/
385 printf("Program %p ID=%u Target=%s Refcount-- to %d\n",
387 ((*ptr
)->Target
== GL_VERTEX_PROGRAM_ARB
? "VP" : "FP"),
388 (*ptr
)->RefCount
- 1);
390 ASSERT((*ptr
)->RefCount
> 0);
393 deleteFlag
= ((*ptr
)->RefCount
== 0);
394 /*_glthread_UNLOCK_MUTEX((*ptr)->Mutex);*/
398 ctx
->Driver
.DeleteProgram(ctx
, *ptr
);
406 /*_glthread_LOCK_MUTEX(prog->Mutex);*/
409 printf("Program %p ID=%u Target=%s Refcount++ to %d\n",
411 (prog
->Target
== GL_VERTEX_PROGRAM_ARB
? "VP" : "FP"),
414 /*_glthread_UNLOCK_MUTEX(prog->Mutex);*/
422 * Return a copy of a program.
423 * XXX Problem here if the program object is actually OO-derivation
424 * made by a device driver.
427 _mesa_clone_program(GLcontext
*ctx
, const struct gl_program
*prog
)
429 struct gl_program
*clone
;
431 clone
= ctx
->Driver
.NewProgram(ctx
, prog
->Target
, prog
->Id
);
435 assert(clone
->Target
== prog
->Target
);
436 assert(clone
->RefCount
== 1);
438 clone
->String
= (GLubyte
*) _mesa_strdup((char *) prog
->String
);
439 clone
->Format
= prog
->Format
;
440 clone
->Instructions
= _mesa_alloc_instructions(prog
->NumInstructions
);
441 if (!clone
->Instructions
) {
442 _mesa_reference_program(ctx
, &clone
, NULL
);
445 _mesa_copy_instructions(clone
->Instructions
, prog
->Instructions
,
446 prog
->NumInstructions
);
447 clone
->InputsRead
= prog
->InputsRead
;
448 clone
->OutputsWritten
= prog
->OutputsWritten
;
449 clone
->SamplersUsed
= prog
->SamplersUsed
;
450 clone
->ShadowSamplers
= prog
->ShadowSamplers
;
451 memcpy(clone
->TexturesUsed
, prog
->TexturesUsed
, sizeof(prog
->TexturesUsed
));
453 if (prog
->Parameters
)
454 clone
->Parameters
= _mesa_clone_parameter_list(prog
->Parameters
);
455 memcpy(clone
->LocalParams
, prog
->LocalParams
, sizeof(clone
->LocalParams
));
457 clone
->Varying
= _mesa_clone_parameter_list(prog
->Varying
);
458 if (prog
->Attributes
)
459 clone
->Attributes
= _mesa_clone_parameter_list(prog
->Attributes
);
460 memcpy(clone
->LocalParams
, prog
->LocalParams
, sizeof(clone
->LocalParams
));
461 clone
->NumInstructions
= prog
->NumInstructions
;
462 clone
->NumTemporaries
= prog
->NumTemporaries
;
463 clone
->NumParameters
= prog
->NumParameters
;
464 clone
->NumAttributes
= prog
->NumAttributes
;
465 clone
->NumAddressRegs
= prog
->NumAddressRegs
;
466 clone
->NumNativeInstructions
= prog
->NumNativeInstructions
;
467 clone
->NumNativeTemporaries
= prog
->NumNativeTemporaries
;
468 clone
->NumNativeParameters
= prog
->NumNativeParameters
;
469 clone
->NumNativeAttributes
= prog
->NumNativeAttributes
;
470 clone
->NumNativeAddressRegs
= prog
->NumNativeAddressRegs
;
471 clone
->NumAluInstructions
= prog
->NumAluInstructions
;
472 clone
->NumTexInstructions
= prog
->NumTexInstructions
;
473 clone
->NumTexIndirections
= prog
->NumTexIndirections
;
474 clone
->NumNativeAluInstructions
= prog
->NumNativeAluInstructions
;
475 clone
->NumNativeTexInstructions
= prog
->NumNativeTexInstructions
;
476 clone
->NumNativeTexIndirections
= prog
->NumNativeTexIndirections
;
478 switch (prog
->Target
) {
479 case GL_VERTEX_PROGRAM_ARB
:
481 const struct gl_vertex_program
*vp
482 = (const struct gl_vertex_program
*) prog
;
483 struct gl_vertex_program
*vpc
= (struct gl_vertex_program
*) clone
;
484 vpc
->IsPositionInvariant
= vp
->IsPositionInvariant
;
487 case GL_FRAGMENT_PROGRAM_ARB
:
489 const struct gl_fragment_program
*fp
490 = (const struct gl_fragment_program
*) prog
;
491 struct gl_fragment_program
*fpc
= (struct gl_fragment_program
*) clone
;
492 fpc
->FogOption
= fp
->FogOption
;
493 fpc
->UsesKill
= fp
->UsesKill
;
497 _mesa_problem(NULL
, "Unexpected target in _mesa_clone_program");
505 * Insert 'count' NOP instructions at 'start' in the given program.
506 * Adjust branch targets accordingly.
509 _mesa_insert_instructions(struct gl_program
*prog
, GLuint start
, GLuint count
)
511 const GLuint origLen
= prog
->NumInstructions
;
512 const GLuint newLen
= origLen
+ count
;
513 struct prog_instruction
*newInst
;
516 /* adjust branches */
517 for (i
= 0; i
< prog
->NumInstructions
; i
++) {
518 struct prog_instruction
*inst
= prog
->Instructions
+ i
;
519 if (inst
->BranchTarget
> 0) {
520 if ((GLuint
)inst
->BranchTarget
>= start
) {
521 inst
->BranchTarget
+= count
;
526 /* Alloc storage for new instructions */
527 newInst
= _mesa_alloc_instructions(newLen
);
532 /* Copy 'start' instructions into new instruction buffer */
533 _mesa_copy_instructions(newInst
, prog
->Instructions
, start
);
535 /* init the new instructions */
536 _mesa_init_instructions(newInst
+ start
, count
);
538 /* Copy the remaining/tail instructions to new inst buffer */
539 _mesa_copy_instructions(newInst
+ start
+ count
,
540 prog
->Instructions
+ start
,
543 /* free old instructions */
544 _mesa_free_instructions(prog
->Instructions
, origLen
);
546 /* install new instructions */
547 prog
->Instructions
= newInst
;
548 prog
->NumInstructions
= newLen
;
554 * Delete 'count' instructions at 'start' in the given program.
555 * Adjust branch targets accordingly.
558 _mesa_delete_instructions(struct gl_program
*prog
, GLuint start
, GLuint count
)
560 const GLuint origLen
= prog
->NumInstructions
;
561 const GLuint newLen
= origLen
- count
;
562 struct prog_instruction
*newInst
;
565 /* adjust branches */
566 for (i
= 0; i
< prog
->NumInstructions
; i
++) {
567 struct prog_instruction
*inst
= prog
->Instructions
+ i
;
568 if (inst
->BranchTarget
> 0) {
569 if (inst
->BranchTarget
>= start
) {
570 inst
->BranchTarget
-= count
;
575 /* Alloc storage for new instructions */
576 newInst
= _mesa_alloc_instructions(newLen
);
581 /* Copy 'start' instructions into new instruction buffer */
582 _mesa_copy_instructions(newInst
, prog
->Instructions
, start
);
584 /* Copy the remaining/tail instructions to new inst buffer */
585 _mesa_copy_instructions(newInst
+ start
,
586 prog
->Instructions
+ start
+ count
,
589 /* free old instructions */
590 _mesa_free_instructions(prog
->Instructions
, origLen
);
592 /* install new instructions */
593 prog
->Instructions
= newInst
;
594 prog
->NumInstructions
= newLen
;
601 * Search instructions for registers that match (oldFile, oldIndex),
602 * replacing them with (newFile, newIndex).
605 replace_registers(struct prog_instruction
*inst
, GLuint numInst
,
606 GLuint oldFile
, GLuint oldIndex
,
607 GLuint newFile
, GLuint newIndex
)
610 for (i
= 0; i
< numInst
; i
++) {
612 for (j
= 0; j
< _mesa_num_inst_src_regs(inst
->Opcode
); j
++) {
613 if (inst
[i
].SrcReg
[j
].File
== oldFile
&&
614 inst
[i
].SrcReg
[j
].Index
== oldIndex
) {
615 inst
[i
].SrcReg
[j
].File
= newFile
;
616 inst
[i
].SrcReg
[j
].Index
= newIndex
;
620 if (inst
[i
].DstReg
.File
== oldFile
&& inst
[i
].DstReg
.Index
== oldIndex
) {
621 inst
[i
].DstReg
.File
= newFile
;
622 inst
[i
].DstReg
.Index
= newIndex
;
629 * Search instructions for references to program parameters. When found,
630 * increment the parameter index by 'offset'.
631 * Used when combining programs.
634 adjust_param_indexes(struct prog_instruction
*inst
, GLuint numInst
,
638 for (i
= 0; i
< numInst
; i
++) {
639 for (j
= 0; j
< _mesa_num_inst_src_regs(inst
->Opcode
); j
++) {
640 GLuint f
= inst
[i
].SrcReg
[j
].File
;
641 if (f
== PROGRAM_CONSTANT
||
642 f
== PROGRAM_UNIFORM
||
643 f
== PROGRAM_STATE_VAR
) {
644 inst
[i
].SrcReg
[j
].Index
+= offset
;
652 * Combine two programs into one. Fix instructions so the outputs of
653 * the first program go to the inputs of the second program.
656 _mesa_combine_programs(GLcontext
*ctx
,
657 const struct gl_program
*progA
,
658 const struct gl_program
*progB
)
660 struct prog_instruction
*newInst
;
661 struct gl_program
*newProg
;
662 const GLuint lenA
= progA
->NumInstructions
- 1; /* omit END instr */
663 const GLuint lenB
= progB
->NumInstructions
;
664 const GLuint numParamsA
= _mesa_num_parameters(progA
->Parameters
);
665 const GLuint newLength
= lenA
+ lenB
;
669 ASSERT(progA
->Target
== progB
->Target
);
671 newInst
= _mesa_alloc_instructions(newLength
);
675 _mesa_copy_instructions(newInst
, progA
->Instructions
, lenA
);
676 _mesa_copy_instructions(newInst
+ lenA
, progB
->Instructions
, lenB
);
678 /* adjust branch / instruction addresses for B's instructions */
679 for (i
= 0; i
< lenB
; i
++) {
680 newInst
[lenA
+ i
].BranchTarget
+= lenA
;
683 newProg
= ctx
->Driver
.NewProgram(ctx
, progA
->Target
, 0);
684 newProg
->Instructions
= newInst
;
685 newProg
->NumInstructions
= newLength
;
687 if (newProg
->Target
== GL_FRAGMENT_PROGRAM_ARB
) {
688 struct gl_fragment_program
*fprogA
, *fprogB
, *newFprog
;
689 fprogA
= (struct gl_fragment_program
*) progA
;
690 fprogB
= (struct gl_fragment_program
*) progB
;
691 newFprog
= (struct gl_fragment_program
*) newProg
;
693 newFprog
->UsesKill
= fprogA
->UsesKill
|| fprogB
->UsesKill
;
695 /* Connect color outputs of fprogA to color inputs of fprogB, via a
696 * new temporary register.
698 if ((progA
->OutputsWritten
& (1 << FRAG_RESULT_COLR
)) &&
699 (progB
->InputsRead
& (1 << FRAG_ATTRIB_COL0
))) {
700 GLint tempReg
= _mesa_find_free_register(newProg
, PROGRAM_TEMPORARY
);
702 _mesa_problem(ctx
, "No free temp regs found in "
703 "_mesa_combine_programs(), using 31");
706 /* replace writes to result.color[0] with tempReg */
707 replace_registers(newInst
, lenA
,
708 PROGRAM_OUTPUT
, FRAG_RESULT_COLR
,
709 PROGRAM_TEMPORARY
, tempReg
);
710 /* replace reads from input.color[0] with tempReg */
711 replace_registers(newInst
+ lenA
, lenB
,
712 PROGRAM_INPUT
, FRAG_ATTRIB_COL0
,
713 PROGRAM_TEMPORARY
, tempReg
);
716 inputsB
= progB
->InputsRead
;
717 if (progA
->OutputsWritten
& (1 << FRAG_RESULT_COLR
)) {
718 inputsB
&= ~(1 << FRAG_ATTRIB_COL0
);
720 newProg
->InputsRead
= progA
->InputsRead
| inputsB
;
721 newProg
->OutputsWritten
= progB
->OutputsWritten
;
722 newProg
->SamplersUsed
= progA
->SamplersUsed
| progB
->SamplersUsed
;
726 assert(0); /* XXX todo */
730 * Merge parameters (uniforms, constants, etc)
732 newProg
->Parameters
= _mesa_combine_parameter_lists(progA
->Parameters
,
735 adjust_param_indexes(newInst
+ lenA
, lenB
, numParamsA
);
745 * Scan the given program to find a free register of the given type.
746 * \param regFile - PROGRAM_INPUT, PROGRAM_OUTPUT or PROGRAM_TEMPORARY
749 _mesa_find_free_register(const struct gl_program
*prog
, GLuint regFile
)
751 GLboolean used
[MAX_PROGRAM_TEMPS
];
754 assert(regFile
== PROGRAM_INPUT
||
755 regFile
== PROGRAM_OUTPUT
||
756 regFile
== PROGRAM_TEMPORARY
);
758 _mesa_memset(used
, 0, sizeof(used
));
760 for (i
= 0; i
< prog
->NumInstructions
; i
++) {
761 const struct prog_instruction
*inst
= prog
->Instructions
+ i
;
762 const GLuint n
= _mesa_num_inst_src_regs(inst
->Opcode
);
764 for (k
= 0; k
< n
; k
++) {
765 if (inst
->SrcReg
[k
].File
== regFile
) {
766 used
[inst
->SrcReg
[k
].Index
] = GL_TRUE
;
771 for (i
= 0; i
< MAX_PROGRAM_TEMPS
; i
++) {