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
)
57 * If this assertion fails, we need to increase the field
58 * size for register indexes.
60 ASSERT(ctx
->Const
.VertexProgram
.MaxUniformComponents
/ 4
61 <= (1 << INST_INDEX_BITS
));
62 ASSERT(ctx
->Const
.FragmentProgram
.MaxUniformComponents
/ 4
63 <= (1 << INST_INDEX_BITS
));
65 /* If this fails, increase prog_instruction::TexSrcUnit size */
66 ASSERT(MAX_TEXTURE_UNITS
< (1 << 5));
68 /* If this fails, increase prog_instruction::TexSrcTarget size */
69 ASSERT(NUM_TEXTURE_TARGETS
< (1 << 3));
71 ctx
->Program
.ErrorPos
= -1;
72 ctx
->Program
.ErrorString
= _mesa_strdup("");
74 #if FEATURE_NV_vertex_program || FEATURE_ARB_vertex_program
75 ctx
->VertexProgram
.Enabled
= GL_FALSE
;
77 ctx
->VertexProgram
.PointSizeEnabled
= GL_TRUE
;
79 ctx
->VertexProgram
.PointSizeEnabled
= GL_FALSE
;
81 ctx
->VertexProgram
.TwoSideEnabled
= GL_FALSE
;
82 _mesa_reference_vertprog(ctx
, &ctx
->VertexProgram
.Current
,
83 ctx
->Shared
->DefaultVertexProgram
);
84 assert(ctx
->VertexProgram
.Current
);
85 for (i
= 0; i
< MAX_NV_VERTEX_PROGRAM_PARAMS
/ 4; i
++) {
86 ctx
->VertexProgram
.TrackMatrix
[i
] = GL_NONE
;
87 ctx
->VertexProgram
.TrackMatrixTransform
[i
] = GL_IDENTITY_NV
;
89 ctx
->VertexProgram
.Cache
= _mesa_new_program_cache();
92 #if FEATURE_NV_fragment_program || FEATURE_ARB_fragment_program
93 ctx
->FragmentProgram
.Enabled
= GL_FALSE
;
94 _mesa_reference_fragprog(ctx
, &ctx
->FragmentProgram
.Current
,
95 ctx
->Shared
->DefaultFragmentProgram
);
96 assert(ctx
->FragmentProgram
.Current
);
97 ctx
->FragmentProgram
.Cache
= _mesa_new_program_cache();
101 /* XXX probably move this stuff */
102 #if FEATURE_ATI_fragment_shader
103 ctx
->ATIFragmentShader
.Enabled
= GL_FALSE
;
104 ctx
->ATIFragmentShader
.Current
= ctx
->Shared
->DefaultFragmentShader
;
105 assert(ctx
->ATIFragmentShader
.Current
);
106 ctx
->ATIFragmentShader
.Current
->RefCount
++;
112 * Free a context's vertex/fragment program state
115 _mesa_free_program_data(GLcontext
*ctx
)
117 #if FEATURE_NV_vertex_program || FEATURE_ARB_vertex_program
118 _mesa_reference_vertprog(ctx
, &ctx
->VertexProgram
.Current
, NULL
);
119 _mesa_delete_program_cache(ctx
, ctx
->VertexProgram
.Cache
);
121 #if FEATURE_NV_fragment_program || FEATURE_ARB_fragment_program
122 _mesa_reference_fragprog(ctx
, &ctx
->FragmentProgram
.Current
, NULL
);
123 _mesa_delete_program_cache(ctx
, ctx
->FragmentProgram
.Cache
);
125 /* XXX probably move this stuff */
126 #if FEATURE_ATI_fragment_shader
127 if (ctx
->ATIFragmentShader
.Current
) {
128 ctx
->ATIFragmentShader
.Current
->RefCount
--;
129 if (ctx
->ATIFragmentShader
.Current
->RefCount
<= 0) {
130 _mesa_free(ctx
->ATIFragmentShader
.Current
);
134 _mesa_free((void *) ctx
->Program
.ErrorString
);
139 * Update the default program objects in the given context to reference those
140 * specified in the shared state and release those referencing the old
144 _mesa_update_default_objects_program(GLcontext
*ctx
)
146 #if FEATURE_NV_vertex_program || FEATURE_ARB_vertex_program
147 _mesa_reference_vertprog(ctx
, &ctx
->VertexProgram
.Current
,
148 (struct gl_vertex_program
*)
149 ctx
->Shared
->DefaultVertexProgram
);
150 assert(ctx
->VertexProgram
.Current
);
153 #if FEATURE_NV_fragment_program || FEATURE_ARB_fragment_program
154 _mesa_reference_fragprog(ctx
, &ctx
->FragmentProgram
.Current
,
155 (struct gl_fragment_program
*)
156 ctx
->Shared
->DefaultFragmentProgram
);
157 assert(ctx
->FragmentProgram
.Current
);
160 /* XXX probably move this stuff */
161 #if FEATURE_ATI_fragment_shader
162 if (ctx
->ATIFragmentShader
.Current
) {
163 ctx
->ATIFragmentShader
.Current
->RefCount
--;
164 if (ctx
->ATIFragmentShader
.Current
->RefCount
<= 0) {
165 _mesa_free(ctx
->ATIFragmentShader
.Current
);
168 ctx
->ATIFragmentShader
.Current
= (struct ati_fragment_shader
*) ctx
->Shared
->DefaultFragmentShader
;
169 assert(ctx
->ATIFragmentShader
.Current
);
170 ctx
->ATIFragmentShader
.Current
->RefCount
++;
176 * Set the vertex/fragment program error state (position and error string).
177 * This is generally called from within the parsers.
180 _mesa_set_program_error(GLcontext
*ctx
, GLint pos
, const char *string
)
182 ctx
->Program
.ErrorPos
= pos
;
183 _mesa_free((void *) ctx
->Program
.ErrorString
);
186 ctx
->Program
.ErrorString
= _mesa_strdup(string
);
191 * Find the line number and column for 'pos' within 'string'.
192 * Return a copy of the line which contains 'pos'. Free the line with
194 * \param string the program string
195 * \param pos the position within the string
196 * \param line returns the line number corresponding to 'pos'.
197 * \param col returns the column number corresponding to 'pos'.
198 * \return copy of the line containing 'pos'.
201 _mesa_find_line_column(const GLubyte
*string
, const GLubyte
*pos
,
202 GLint
*line
, GLint
*col
)
204 const GLubyte
*lineStart
= string
;
205 const GLubyte
*p
= string
;
212 if (*p
== (GLubyte
) '\n') {
219 *col
= (pos
- lineStart
) + 1;
221 /* return copy of this line */
222 while (*p
!= 0 && *p
!= '\n')
225 s
= (GLubyte
*) _mesa_malloc(len
+ 1);
226 _mesa_memcpy(s
, lineStart
, len
);
234 * Initialize a new vertex/fragment program object.
236 static struct gl_program
*
237 _mesa_init_program_struct( GLcontext
*ctx
, struct gl_program
*prog
,
238 GLenum target
, GLuint id
)
243 _mesa_bzero(prog
, sizeof(*prog
));
245 prog
->Target
= target
;
246 prog
->Resident
= GL_TRUE
;
248 prog
->Format
= GL_PROGRAM_FORMAT_ASCII_ARB
;
250 /* default mapping from samplers to texture units */
251 for (i
= 0; i
< MAX_SAMPLERS
; i
++)
252 prog
->SamplerUnits
[i
] = i
;
260 * Initialize a new fragment program object.
263 _mesa_init_fragment_program( GLcontext
*ctx
, struct gl_fragment_program
*prog
,
264 GLenum target
, GLuint id
)
267 return _mesa_init_program_struct( ctx
, &prog
->Base
, target
, id
);
274 * Initialize a new vertex program object.
277 _mesa_init_vertex_program( GLcontext
*ctx
, struct gl_vertex_program
*prog
,
278 GLenum target
, GLuint id
)
281 return _mesa_init_program_struct( ctx
, &prog
->Base
, target
, id
);
288 * Allocate and initialize a new fragment/vertex program object but
289 * don't put it into the program hash table. Called via
290 * ctx->Driver.NewProgram. May be overridden (ie. replaced) by a
291 * device driver function to implement OO deriviation with additional
292 * types not understood by this function.
295 * \param id program id/number
296 * \param target program target/type
297 * \return pointer to new program object
300 _mesa_new_program(GLcontext
*ctx
, GLenum target
, GLuint id
)
302 struct gl_program
*prog
;
304 case GL_VERTEX_PROGRAM_ARB
: /* == GL_VERTEX_PROGRAM_NV */
305 case GL_VERTEX_STATE_PROGRAM_NV
:
306 prog
= _mesa_init_vertex_program(ctx
, CALLOC_STRUCT(gl_vertex_program
),
309 case GL_FRAGMENT_PROGRAM_NV
:
310 case GL_FRAGMENT_PROGRAM_ARB
:
311 prog
=_mesa_init_fragment_program(ctx
,
312 CALLOC_STRUCT(gl_fragment_program
),
316 _mesa_problem(ctx
, "bad target in _mesa_new_program");
324 * Delete a program and remove it from the hash table, ignoring the
326 * Called via ctx->Driver.DeleteProgram. May be wrapped (OO deriviation)
327 * by a device driver function.
330 _mesa_delete_program(GLcontext
*ctx
, struct gl_program
*prog
)
334 ASSERT(prog
->RefCount
==0);
336 if (prog
== &_mesa_DummyProgram
)
340 _mesa_free(prog
->String
);
342 _mesa_free_instructions(prog
->Instructions
, prog
->NumInstructions
);
344 if (prog
->Parameters
) {
345 _mesa_free_parameter_list(prog
->Parameters
);
348 _mesa_free_parameter_list(prog
->Varying
);
350 if (prog
->Attributes
) {
351 _mesa_free_parameter_list(prog
->Attributes
);
354 /* XXX this is a little ugly */
355 if (prog
->Target
== GL_VERTEX_PROGRAM_ARB
) {
356 struct gl_vertex_program
*vprog
= (struct gl_vertex_program
*) prog
;
358 _mesa_free(vprog
->TnlData
);
366 * Return the gl_program object for a given ID.
367 * Basically just a wrapper for _mesa_HashLookup() to avoid a lot of
371 _mesa_lookup_program(GLcontext
*ctx
, GLuint id
)
374 return (struct gl_program
*) _mesa_HashLookup(ctx
->Shared
->Programs
, id
);
381 * Reference counting for vertex/fragment programs
384 _mesa_reference_program(GLcontext
*ctx
,
385 struct gl_program
**ptr
,
386 struct gl_program
*prog
)
391 if ((*ptr
)->Target
== GL_VERTEX_PROGRAM_ARB
)
392 ASSERT(prog
->Target
== GL_VERTEX_PROGRAM_ARB
);
393 else if ((*ptr
)->Target
== GL_FRAGMENT_PROGRAM_ARB
)
394 ASSERT(prog
->Target
== GL_FRAGMENT_PROGRAM_ARB
||
395 prog
->Target
== GL_FRAGMENT_PROGRAM_NV
);
398 return; /* no change */
401 GLboolean deleteFlag
;
403 /*_glthread_LOCK_MUTEX((*ptr)->Mutex);*/
405 printf("Program %p ID=%u Target=%s Refcount-- to %d\n",
407 ((*ptr
)->Target
== GL_VERTEX_PROGRAM_ARB
? "VP" : "FP"),
408 (*ptr
)->RefCount
- 1);
410 ASSERT((*ptr
)->RefCount
> 0);
413 deleteFlag
= ((*ptr
)->RefCount
== 0);
414 /*_glthread_UNLOCK_MUTEX((*ptr)->Mutex);*/
418 ctx
->Driver
.DeleteProgram(ctx
, *ptr
);
426 /*_glthread_LOCK_MUTEX(prog->Mutex);*/
429 printf("Program %p ID=%u Target=%s Refcount++ to %d\n",
431 (prog
->Target
== GL_VERTEX_PROGRAM_ARB
? "VP" : "FP"),
434 /*_glthread_UNLOCK_MUTEX(prog->Mutex);*/
442 * Return a copy of a program.
443 * XXX Problem here if the program object is actually OO-derivation
444 * made by a device driver.
447 _mesa_clone_program(GLcontext
*ctx
, const struct gl_program
*prog
)
449 struct gl_program
*clone
;
451 clone
= ctx
->Driver
.NewProgram(ctx
, prog
->Target
, prog
->Id
);
455 assert(clone
->Target
== prog
->Target
);
456 assert(clone
->RefCount
== 1);
458 clone
->String
= (GLubyte
*) _mesa_strdup((char *) prog
->String
);
459 clone
->Format
= prog
->Format
;
460 clone
->Instructions
= _mesa_alloc_instructions(prog
->NumInstructions
);
461 if (!clone
->Instructions
) {
462 _mesa_reference_program(ctx
, &clone
, NULL
);
465 _mesa_copy_instructions(clone
->Instructions
, prog
->Instructions
,
466 prog
->NumInstructions
);
467 clone
->InputsRead
= prog
->InputsRead
;
468 clone
->OutputsWritten
= prog
->OutputsWritten
;
469 clone
->SamplersUsed
= prog
->SamplersUsed
;
470 clone
->ShadowSamplers
= prog
->ShadowSamplers
;
471 memcpy(clone
->TexturesUsed
, prog
->TexturesUsed
, sizeof(prog
->TexturesUsed
));
473 if (prog
->Parameters
)
474 clone
->Parameters
= _mesa_clone_parameter_list(prog
->Parameters
);
475 memcpy(clone
->LocalParams
, prog
->LocalParams
, sizeof(clone
->LocalParams
));
477 clone
->Varying
= _mesa_clone_parameter_list(prog
->Varying
);
478 if (prog
->Attributes
)
479 clone
->Attributes
= _mesa_clone_parameter_list(prog
->Attributes
);
480 memcpy(clone
->LocalParams
, prog
->LocalParams
, sizeof(clone
->LocalParams
));
481 clone
->NumInstructions
= prog
->NumInstructions
;
482 clone
->NumTemporaries
= prog
->NumTemporaries
;
483 clone
->NumParameters
= prog
->NumParameters
;
484 clone
->NumAttributes
= prog
->NumAttributes
;
485 clone
->NumAddressRegs
= prog
->NumAddressRegs
;
486 clone
->NumNativeInstructions
= prog
->NumNativeInstructions
;
487 clone
->NumNativeTemporaries
= prog
->NumNativeTemporaries
;
488 clone
->NumNativeParameters
= prog
->NumNativeParameters
;
489 clone
->NumNativeAttributes
= prog
->NumNativeAttributes
;
490 clone
->NumNativeAddressRegs
= prog
->NumNativeAddressRegs
;
491 clone
->NumAluInstructions
= prog
->NumAluInstructions
;
492 clone
->NumTexInstructions
= prog
->NumTexInstructions
;
493 clone
->NumTexIndirections
= prog
->NumTexIndirections
;
494 clone
->NumNativeAluInstructions
= prog
->NumNativeAluInstructions
;
495 clone
->NumNativeTexInstructions
= prog
->NumNativeTexInstructions
;
496 clone
->NumNativeTexIndirections
= prog
->NumNativeTexIndirections
;
498 switch (prog
->Target
) {
499 case GL_VERTEX_PROGRAM_ARB
:
501 const struct gl_vertex_program
*vp
502 = (const struct gl_vertex_program
*) prog
;
503 struct gl_vertex_program
*vpc
= (struct gl_vertex_program
*) clone
;
504 vpc
->IsPositionInvariant
= vp
->IsPositionInvariant
;
507 case GL_FRAGMENT_PROGRAM_ARB
:
509 const struct gl_fragment_program
*fp
510 = (const struct gl_fragment_program
*) prog
;
511 struct gl_fragment_program
*fpc
= (struct gl_fragment_program
*) clone
;
512 fpc
->FogOption
= fp
->FogOption
;
513 fpc
->UsesKill
= fp
->UsesKill
;
517 _mesa_problem(NULL
, "Unexpected target in _mesa_clone_program");
525 * Insert 'count' NOP instructions at 'start' in the given program.
526 * Adjust branch targets accordingly.
529 _mesa_insert_instructions(struct gl_program
*prog
, GLuint start
, GLuint count
)
531 const GLuint origLen
= prog
->NumInstructions
;
532 const GLuint newLen
= origLen
+ count
;
533 struct prog_instruction
*newInst
;
536 /* adjust branches */
537 for (i
= 0; i
< prog
->NumInstructions
; i
++) {
538 struct prog_instruction
*inst
= prog
->Instructions
+ i
;
539 if (inst
->BranchTarget
> 0) {
540 if ((GLuint
)inst
->BranchTarget
>= start
) {
541 inst
->BranchTarget
+= count
;
546 /* Alloc storage for new instructions */
547 newInst
= _mesa_alloc_instructions(newLen
);
552 /* Copy 'start' instructions into new instruction buffer */
553 _mesa_copy_instructions(newInst
, prog
->Instructions
, start
);
555 /* init the new instructions */
556 _mesa_init_instructions(newInst
+ start
, count
);
558 /* Copy the remaining/tail instructions to new inst buffer */
559 _mesa_copy_instructions(newInst
+ start
+ count
,
560 prog
->Instructions
+ start
,
563 /* free old instructions */
564 _mesa_free_instructions(prog
->Instructions
, origLen
);
566 /* install new instructions */
567 prog
->Instructions
= newInst
;
568 prog
->NumInstructions
= newLen
;
574 * Delete 'count' instructions at 'start' in the given program.
575 * Adjust branch targets accordingly.
578 _mesa_delete_instructions(struct gl_program
*prog
, GLuint start
, GLuint count
)
580 const GLuint origLen
= prog
->NumInstructions
;
581 const GLuint newLen
= origLen
- count
;
582 struct prog_instruction
*newInst
;
585 /* adjust branches */
586 for (i
= 0; i
< prog
->NumInstructions
; i
++) {
587 struct prog_instruction
*inst
= prog
->Instructions
+ i
;
588 if (inst
->BranchTarget
> 0) {
589 if (inst
->BranchTarget
> start
) {
590 inst
->BranchTarget
-= count
;
595 /* Alloc storage for new instructions */
596 newInst
= _mesa_alloc_instructions(newLen
);
601 /* Copy 'start' instructions into new instruction buffer */
602 _mesa_copy_instructions(newInst
, prog
->Instructions
, start
);
604 /* Copy the remaining/tail instructions to new inst buffer */
605 _mesa_copy_instructions(newInst
+ start
,
606 prog
->Instructions
+ start
+ count
,
609 /* free old instructions */
610 _mesa_free_instructions(prog
->Instructions
, origLen
);
612 /* install new instructions */
613 prog
->Instructions
= newInst
;
614 prog
->NumInstructions
= newLen
;
621 * Search instructions for registers that match (oldFile, oldIndex),
622 * replacing them with (newFile, newIndex).
625 replace_registers(struct prog_instruction
*inst
, GLuint numInst
,
626 GLuint oldFile
, GLuint oldIndex
,
627 GLuint newFile
, GLuint newIndex
)
630 for (i
= 0; i
< numInst
; i
++) {
632 for (j
= 0; j
< _mesa_num_inst_src_regs(inst
->Opcode
); j
++) {
633 if (inst
[i
].SrcReg
[j
].File
== oldFile
&&
634 inst
[i
].SrcReg
[j
].Index
== oldIndex
) {
635 inst
[i
].SrcReg
[j
].File
= newFile
;
636 inst
[i
].SrcReg
[j
].Index
= newIndex
;
640 if (inst
[i
].DstReg
.File
== oldFile
&& inst
[i
].DstReg
.Index
== oldIndex
) {
641 inst
[i
].DstReg
.File
= newFile
;
642 inst
[i
].DstReg
.Index
= newIndex
;
649 * Search instructions for references to program parameters. When found,
650 * increment the parameter index by 'offset'.
651 * Used when combining programs.
654 adjust_param_indexes(struct prog_instruction
*inst
, GLuint numInst
,
658 for (i
= 0; i
< numInst
; i
++) {
659 for (j
= 0; j
< _mesa_num_inst_src_regs(inst
->Opcode
); j
++) {
660 GLuint f
= inst
[i
].SrcReg
[j
].File
;
661 if (f
== PROGRAM_CONSTANT
||
662 f
== PROGRAM_UNIFORM
||
663 f
== PROGRAM_STATE_VAR
) {
664 inst
[i
].SrcReg
[j
].Index
+= offset
;
672 * Combine two programs into one. Fix instructions so the outputs of
673 * the first program go to the inputs of the second program.
676 _mesa_combine_programs(GLcontext
*ctx
,
677 const struct gl_program
*progA
,
678 const struct gl_program
*progB
)
680 struct prog_instruction
*newInst
;
681 struct gl_program
*newProg
;
682 const GLuint lenA
= progA
->NumInstructions
- 1; /* omit END instr */
683 const GLuint lenB
= progB
->NumInstructions
;
684 const GLuint numParamsA
= _mesa_num_parameters(progA
->Parameters
);
685 const GLuint newLength
= lenA
+ lenB
;
689 ASSERT(progA
->Target
== progB
->Target
);
691 newInst
= _mesa_alloc_instructions(newLength
);
695 _mesa_copy_instructions(newInst
, progA
->Instructions
, lenA
);
696 _mesa_copy_instructions(newInst
+ lenA
, progB
->Instructions
, lenB
);
698 /* adjust branch / instruction addresses for B's instructions */
699 for (i
= 0; i
< lenB
; i
++) {
700 newInst
[lenA
+ i
].BranchTarget
+= lenA
;
703 newProg
= ctx
->Driver
.NewProgram(ctx
, progA
->Target
, 0);
704 newProg
->Instructions
= newInst
;
705 newProg
->NumInstructions
= newLength
;
707 if (newProg
->Target
== GL_FRAGMENT_PROGRAM_ARB
) {
708 struct gl_fragment_program
*fprogA
, *fprogB
, *newFprog
;
709 GLbitfield progB_inputsRead
= progB
->InputsRead
;
710 GLint progB_colorFile
, progB_colorIndex
;
712 fprogA
= (struct gl_fragment_program
*) progA
;
713 fprogB
= (struct gl_fragment_program
*) progB
;
714 newFprog
= (struct gl_fragment_program
*) newProg
;
716 newFprog
->UsesKill
= fprogA
->UsesKill
|| fprogB
->UsesKill
;
718 /* We'll do a search and replace for instances
719 * of progB_colorFile/progB_colorIndex below...
721 progB_colorFile
= PROGRAM_INPUT
;
722 progB_colorIndex
= FRAG_ATTRIB_COL0
;
725 * The fragment program may get color from a state var rather than
726 * a fragment input (vertex output) if it's constant.
727 * See the texenvprogram.c code.
728 * So, search the program's parameter list now to see if the program
729 * gets color from a state var instead of a conventional fragment
732 for (i
= 0; i
< progB
->Parameters
->NumParameters
; i
++) {
733 struct gl_program_parameter
*p
= &progB
->Parameters
->Parameters
[i
];
734 if (p
->Type
== PROGRAM_STATE_VAR
&&
735 p
->StateIndexes
[0] == STATE_INTERNAL
&&
736 p
->StateIndexes
[1] == STATE_CURRENT_ATTRIB
&&
737 p
->StateIndexes
[2] == VERT_ATTRIB_COLOR0
) {
738 progB_inputsRead
|= FRAG_BIT_COL0
;
739 progB_colorFile
= PROGRAM_STATE_VAR
;
740 progB_colorIndex
= i
;
745 /* Connect color outputs of fprogA to color inputs of fprogB, via a
746 * new temporary register.
748 if ((progA
->OutputsWritten
& (1 << FRAG_RESULT_COLOR
)) &&
749 (progB_inputsRead
& FRAG_BIT_COL0
)) {
750 GLint tempReg
= _mesa_find_free_register(newProg
, PROGRAM_TEMPORARY
);
752 _mesa_problem(ctx
, "No free temp regs found in "
753 "_mesa_combine_programs(), using 31");
756 /* replace writes to result.color[0] with tempReg */
757 replace_registers(newInst
, lenA
,
758 PROGRAM_OUTPUT
, FRAG_RESULT_COLOR
,
759 PROGRAM_TEMPORARY
, tempReg
);
760 /* replace reads from the input color with tempReg */
761 replace_registers(newInst
+ lenA
, lenB
,
762 progB_colorFile
, progB_colorIndex
, /* search for */
763 PROGRAM_TEMPORARY
, tempReg
/* replace with */ );
766 /* compute combined program's InputsRead */
767 inputsB
= progB_inputsRead
;
768 if (progA
->OutputsWritten
& (1 << FRAG_RESULT_COLOR
)) {
769 inputsB
&= ~(1 << FRAG_ATTRIB_COL0
);
771 newProg
->InputsRead
= progA
->InputsRead
| inputsB
;
772 newProg
->OutputsWritten
= progB
->OutputsWritten
;
773 newProg
->SamplersUsed
= progA
->SamplersUsed
| progB
->SamplersUsed
;
777 assert(0); /* XXX todo */
781 * Merge parameters (uniforms, constants, etc)
783 newProg
->Parameters
= _mesa_combine_parameter_lists(progA
->Parameters
,
786 adjust_param_indexes(newInst
+ lenA
, lenB
, numParamsA
);
796 * Scan the given program to find a free register of the given type.
797 * \param regFile - PROGRAM_INPUT, PROGRAM_OUTPUT or PROGRAM_TEMPORARY
800 _mesa_find_free_register(const struct gl_program
*prog
, GLuint regFile
)
802 GLboolean used
[MAX_PROGRAM_TEMPS
];
805 assert(regFile
== PROGRAM_INPUT
||
806 regFile
== PROGRAM_OUTPUT
||
807 regFile
== PROGRAM_TEMPORARY
);
809 _mesa_memset(used
, 0, sizeof(used
));
811 for (i
= 0; i
< prog
->NumInstructions
; i
++) {
812 const struct prog_instruction
*inst
= prog
->Instructions
+ i
;
813 const GLuint n
= _mesa_num_inst_src_regs(inst
->Opcode
);
815 for (k
= 0; k
< n
; k
++) {
816 if (inst
->SrcReg
[k
].File
== regFile
) {
817 used
[inst
->SrcReg
[k
].Index
] = GL_TRUE
;
822 for (i
= 0; i
< MAX_PROGRAM_TEMPS
; i
++) {
833 * "Post-process" a GPU program. This is intended to be used for debugging.
834 * Example actions include no-op'ing instructions or changing instruction
838 _mesa_postprocess_program(GLcontext
*ctx
, struct gl_program
*prog
)
840 static const GLfloat white
[4] = { 0.5, 0.5, 0.5, 0.5 };
843 GLint whiteIndex
= _mesa_add_unnamed_constant(prog
->Parameters
,
844 white
, 4, &whiteSwizzle
);
848 for (i
= 0; i
< prog
->NumInstructions
; i
++) {
849 struct prog_instruction
*inst
= prog
->Instructions
+ i
;
850 const GLuint n
= _mesa_num_inst_src_regs(inst
->Opcode
);
854 if (_mesa_is_tex_instruction(inst
->Opcode
)) {
856 /* replace TEX/TXP/TXB with MOV */
857 inst
->Opcode
= OPCODE_MOV
;
858 inst
->DstReg
.WriteMask
= WRITEMASK_XYZW
;
859 inst
->SrcReg
[0].Swizzle
= SWIZZLE_XYZW
;
860 inst
->SrcReg
[0].Negate
= NEGATE_NONE
;
864 /* disable shadow texture mode */
869 if (inst
->Opcode
== OPCODE_TXP
) {
871 inst
->Opcode
= OPCODE_MOV
;
872 inst
->DstReg
.WriteMask
= WRITEMASK_XYZW
;
873 inst
->SrcReg
[0].File
= PROGRAM_CONSTANT
;
874 inst
->SrcReg
[0].Index
= whiteIndex
;
875 inst
->SrcReg
[0].Swizzle
= SWIZZLE_XYZW
;
876 inst
->SrcReg
[0].Negate
= NEGATE_NONE
;
882 inst
->Opcode
= OPCODE_TEX
;