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
);
359 * Return the gl_program object for a given ID.
360 * Basically just a wrapper for _mesa_HashLookup() to avoid a lot of
364 _mesa_lookup_program(GLcontext
*ctx
, GLuint id
)
367 return (struct gl_program
*) _mesa_HashLookup(ctx
->Shared
->Programs
, id
);
374 * Reference counting for vertex/fragment programs
377 _mesa_reference_program(GLcontext
*ctx
,
378 struct gl_program
**ptr
,
379 struct gl_program
*prog
)
384 if ((*ptr
)->Target
== GL_VERTEX_PROGRAM_ARB
)
385 ASSERT(prog
->Target
== GL_VERTEX_PROGRAM_ARB
);
386 else if ((*ptr
)->Target
== GL_FRAGMENT_PROGRAM_ARB
)
387 ASSERT(prog
->Target
== GL_FRAGMENT_PROGRAM_ARB
||
388 prog
->Target
== GL_FRAGMENT_PROGRAM_NV
);
391 return; /* no change */
394 GLboolean deleteFlag
;
396 /*_glthread_LOCK_MUTEX((*ptr)->Mutex);*/
398 printf("Program %p ID=%u Target=%s Refcount-- to %d\n",
400 ((*ptr
)->Target
== GL_VERTEX_PROGRAM_ARB
? "VP" : "FP"),
401 (*ptr
)->RefCount
- 1);
403 ASSERT((*ptr
)->RefCount
> 0);
406 deleteFlag
= ((*ptr
)->RefCount
== 0);
407 /*_glthread_UNLOCK_MUTEX((*ptr)->Mutex);*/
411 ctx
->Driver
.DeleteProgram(ctx
, *ptr
);
419 /*_glthread_LOCK_MUTEX(prog->Mutex);*/
422 printf("Program %p ID=%u Target=%s Refcount++ to %d\n",
424 (prog
->Target
== GL_VERTEX_PROGRAM_ARB
? "VP" : "FP"),
427 /*_glthread_UNLOCK_MUTEX(prog->Mutex);*/
435 * Return a copy of a program.
436 * XXX Problem here if the program object is actually OO-derivation
437 * made by a device driver.
440 _mesa_clone_program(GLcontext
*ctx
, const struct gl_program
*prog
)
442 struct gl_program
*clone
;
444 clone
= ctx
->Driver
.NewProgram(ctx
, prog
->Target
, prog
->Id
);
448 assert(clone
->Target
== prog
->Target
);
449 assert(clone
->RefCount
== 1);
451 clone
->String
= (GLubyte
*) _mesa_strdup((char *) prog
->String
);
452 clone
->Format
= prog
->Format
;
453 clone
->Instructions
= _mesa_alloc_instructions(prog
->NumInstructions
);
454 if (!clone
->Instructions
) {
455 _mesa_reference_program(ctx
, &clone
, NULL
);
458 _mesa_copy_instructions(clone
->Instructions
, prog
->Instructions
,
459 prog
->NumInstructions
);
460 clone
->InputsRead
= prog
->InputsRead
;
461 clone
->OutputsWritten
= prog
->OutputsWritten
;
462 clone
->SamplersUsed
= prog
->SamplersUsed
;
463 clone
->ShadowSamplers
= prog
->ShadowSamplers
;
464 memcpy(clone
->TexturesUsed
, prog
->TexturesUsed
, sizeof(prog
->TexturesUsed
));
466 if (prog
->Parameters
)
467 clone
->Parameters
= _mesa_clone_parameter_list(prog
->Parameters
);
468 memcpy(clone
->LocalParams
, prog
->LocalParams
, sizeof(clone
->LocalParams
));
470 clone
->Varying
= _mesa_clone_parameter_list(prog
->Varying
);
471 if (prog
->Attributes
)
472 clone
->Attributes
= _mesa_clone_parameter_list(prog
->Attributes
);
473 memcpy(clone
->LocalParams
, prog
->LocalParams
, sizeof(clone
->LocalParams
));
474 clone
->NumInstructions
= prog
->NumInstructions
;
475 clone
->NumTemporaries
= prog
->NumTemporaries
;
476 clone
->NumParameters
= prog
->NumParameters
;
477 clone
->NumAttributes
= prog
->NumAttributes
;
478 clone
->NumAddressRegs
= prog
->NumAddressRegs
;
479 clone
->NumNativeInstructions
= prog
->NumNativeInstructions
;
480 clone
->NumNativeTemporaries
= prog
->NumNativeTemporaries
;
481 clone
->NumNativeParameters
= prog
->NumNativeParameters
;
482 clone
->NumNativeAttributes
= prog
->NumNativeAttributes
;
483 clone
->NumNativeAddressRegs
= prog
->NumNativeAddressRegs
;
484 clone
->NumAluInstructions
= prog
->NumAluInstructions
;
485 clone
->NumTexInstructions
= prog
->NumTexInstructions
;
486 clone
->NumTexIndirections
= prog
->NumTexIndirections
;
487 clone
->NumNativeAluInstructions
= prog
->NumNativeAluInstructions
;
488 clone
->NumNativeTexInstructions
= prog
->NumNativeTexInstructions
;
489 clone
->NumNativeTexIndirections
= prog
->NumNativeTexIndirections
;
491 switch (prog
->Target
) {
492 case GL_VERTEX_PROGRAM_ARB
:
494 const struct gl_vertex_program
*vp
495 = (const struct gl_vertex_program
*) prog
;
496 struct gl_vertex_program
*vpc
= (struct gl_vertex_program
*) clone
;
497 vpc
->IsPositionInvariant
= vp
->IsPositionInvariant
;
498 vpc
->IsNVProgram
= vp
->IsNVProgram
;
501 case GL_FRAGMENT_PROGRAM_ARB
:
503 const struct gl_fragment_program
*fp
504 = (const struct gl_fragment_program
*) prog
;
505 struct gl_fragment_program
*fpc
= (struct gl_fragment_program
*) clone
;
506 fpc
->FogOption
= fp
->FogOption
;
507 fpc
->UsesKill
= fp
->UsesKill
;
511 _mesa_problem(NULL
, "Unexpected target in _mesa_clone_program");
519 * Insert 'count' NOP instructions at 'start' in the given program.
520 * Adjust branch targets accordingly.
523 _mesa_insert_instructions(struct gl_program
*prog
, GLuint start
, GLuint count
)
525 const GLuint origLen
= prog
->NumInstructions
;
526 const GLuint newLen
= origLen
+ count
;
527 struct prog_instruction
*newInst
;
530 /* adjust branches */
531 for (i
= 0; i
< prog
->NumInstructions
; i
++) {
532 struct prog_instruction
*inst
= prog
->Instructions
+ i
;
533 if (inst
->BranchTarget
> 0) {
534 if ((GLuint
)inst
->BranchTarget
>= start
) {
535 inst
->BranchTarget
+= count
;
540 /* Alloc storage for new instructions */
541 newInst
= _mesa_alloc_instructions(newLen
);
546 /* Copy 'start' instructions into new instruction buffer */
547 _mesa_copy_instructions(newInst
, prog
->Instructions
, start
);
549 /* init the new instructions */
550 _mesa_init_instructions(newInst
+ start
, count
);
552 /* Copy the remaining/tail instructions to new inst buffer */
553 _mesa_copy_instructions(newInst
+ start
+ count
,
554 prog
->Instructions
+ start
,
557 /* free old instructions */
558 _mesa_free_instructions(prog
->Instructions
, origLen
);
560 /* install new instructions */
561 prog
->Instructions
= newInst
;
562 prog
->NumInstructions
= newLen
;
568 * Delete 'count' instructions at 'start' in the given program.
569 * Adjust branch targets accordingly.
572 _mesa_delete_instructions(struct gl_program
*prog
, GLuint start
, GLuint count
)
574 const GLuint origLen
= prog
->NumInstructions
;
575 const GLuint newLen
= origLen
- count
;
576 struct prog_instruction
*newInst
;
579 /* adjust branches */
580 for (i
= 0; i
< prog
->NumInstructions
; i
++) {
581 struct prog_instruction
*inst
= prog
->Instructions
+ i
;
582 if (inst
->BranchTarget
> 0) {
583 if (inst
->BranchTarget
> start
) {
584 inst
->BranchTarget
-= count
;
589 /* Alloc storage for new instructions */
590 newInst
= _mesa_alloc_instructions(newLen
);
595 /* Copy 'start' instructions into new instruction buffer */
596 _mesa_copy_instructions(newInst
, prog
->Instructions
, start
);
598 /* Copy the remaining/tail instructions to new inst buffer */
599 _mesa_copy_instructions(newInst
+ start
,
600 prog
->Instructions
+ start
+ count
,
603 /* free old instructions */
604 _mesa_free_instructions(prog
->Instructions
, origLen
);
606 /* install new instructions */
607 prog
->Instructions
= newInst
;
608 prog
->NumInstructions
= newLen
;
615 * Search instructions for registers that match (oldFile, oldIndex),
616 * replacing them with (newFile, newIndex).
619 replace_registers(struct prog_instruction
*inst
, GLuint numInst
,
620 GLuint oldFile
, GLuint oldIndex
,
621 GLuint newFile
, GLuint newIndex
)
624 for (i
= 0; i
< numInst
; i
++) {
626 for (j
= 0; j
< _mesa_num_inst_src_regs(inst
->Opcode
); j
++) {
627 if (inst
[i
].SrcReg
[j
].File
== oldFile
&&
628 inst
[i
].SrcReg
[j
].Index
== oldIndex
) {
629 inst
[i
].SrcReg
[j
].File
= newFile
;
630 inst
[i
].SrcReg
[j
].Index
= newIndex
;
634 if (inst
[i
].DstReg
.File
== oldFile
&& inst
[i
].DstReg
.Index
== oldIndex
) {
635 inst
[i
].DstReg
.File
= newFile
;
636 inst
[i
].DstReg
.Index
= newIndex
;
643 * Search instructions for references to program parameters. When found,
644 * increment the parameter index by 'offset'.
645 * Used when combining programs.
648 adjust_param_indexes(struct prog_instruction
*inst
, GLuint numInst
,
652 for (i
= 0; i
< numInst
; i
++) {
653 for (j
= 0; j
< _mesa_num_inst_src_regs(inst
->Opcode
); j
++) {
654 GLuint f
= inst
[i
].SrcReg
[j
].File
;
655 if (f
== PROGRAM_CONSTANT
||
656 f
== PROGRAM_UNIFORM
||
657 f
== PROGRAM_STATE_VAR
) {
658 inst
[i
].SrcReg
[j
].Index
+= offset
;
666 * Combine two programs into one. Fix instructions so the outputs of
667 * the first program go to the inputs of the second program.
670 _mesa_combine_programs(GLcontext
*ctx
,
671 const struct gl_program
*progA
,
672 const struct gl_program
*progB
)
674 struct prog_instruction
*newInst
;
675 struct gl_program
*newProg
;
676 const GLuint lenA
= progA
->NumInstructions
- 1; /* omit END instr */
677 const GLuint lenB
= progB
->NumInstructions
;
678 const GLuint numParamsA
= _mesa_num_parameters(progA
->Parameters
);
679 const GLuint newLength
= lenA
+ lenB
;
683 ASSERT(progA
->Target
== progB
->Target
);
685 newInst
= _mesa_alloc_instructions(newLength
);
689 _mesa_copy_instructions(newInst
, progA
->Instructions
, lenA
);
690 _mesa_copy_instructions(newInst
+ lenA
, progB
->Instructions
, lenB
);
692 /* adjust branch / instruction addresses for B's instructions */
693 for (i
= 0; i
< lenB
; i
++) {
694 newInst
[lenA
+ i
].BranchTarget
+= lenA
;
697 newProg
= ctx
->Driver
.NewProgram(ctx
, progA
->Target
, 0);
698 newProg
->Instructions
= newInst
;
699 newProg
->NumInstructions
= newLength
;
701 if (newProg
->Target
== GL_FRAGMENT_PROGRAM_ARB
) {
702 struct gl_fragment_program
*fprogA
, *fprogB
, *newFprog
;
703 GLbitfield progB_inputsRead
= progB
->InputsRead
;
704 GLint progB_colorFile
, progB_colorIndex
;
706 fprogA
= (struct gl_fragment_program
*) progA
;
707 fprogB
= (struct gl_fragment_program
*) progB
;
708 newFprog
= (struct gl_fragment_program
*) newProg
;
710 newFprog
->UsesKill
= fprogA
->UsesKill
|| fprogB
->UsesKill
;
712 /* We'll do a search and replace for instances
713 * of progB_colorFile/progB_colorIndex below...
715 progB_colorFile
= PROGRAM_INPUT
;
716 progB_colorIndex
= FRAG_ATTRIB_COL0
;
719 * The fragment program may get color from a state var rather than
720 * a fragment input (vertex output) if it's constant.
721 * See the texenvprogram.c code.
722 * So, search the program's parameter list now to see if the program
723 * gets color from a state var instead of a conventional fragment
726 for (i
= 0; i
< progB
->Parameters
->NumParameters
; i
++) {
727 struct gl_program_parameter
*p
= &progB
->Parameters
->Parameters
[i
];
728 if (p
->Type
== PROGRAM_STATE_VAR
&&
729 p
->StateIndexes
[0] == STATE_INTERNAL
&&
730 p
->StateIndexes
[1] == STATE_CURRENT_ATTRIB
&&
731 p
->StateIndexes
[2] == VERT_ATTRIB_COLOR0
) {
732 progB_inputsRead
|= FRAG_BIT_COL0
;
733 progB_colorFile
= PROGRAM_STATE_VAR
;
734 progB_colorIndex
= i
;
739 /* Connect color outputs of fprogA to color inputs of fprogB, via a
740 * new temporary register.
742 if ((progA
->OutputsWritten
& (1 << FRAG_RESULT_COLOR
)) &&
743 (progB_inputsRead
& FRAG_BIT_COL0
)) {
744 GLint tempReg
= _mesa_find_free_register(newProg
, PROGRAM_TEMPORARY
);
746 _mesa_problem(ctx
, "No free temp regs found in "
747 "_mesa_combine_programs(), using 31");
750 /* replace writes to result.color[0] with tempReg */
751 replace_registers(newInst
, lenA
,
752 PROGRAM_OUTPUT
, FRAG_RESULT_COLOR
,
753 PROGRAM_TEMPORARY
, tempReg
);
754 /* replace reads from the input color with tempReg */
755 replace_registers(newInst
+ lenA
, lenB
,
756 progB_colorFile
, progB_colorIndex
, /* search for */
757 PROGRAM_TEMPORARY
, tempReg
/* replace with */ );
760 /* compute combined program's InputsRead */
761 inputsB
= progB_inputsRead
;
762 if (progA
->OutputsWritten
& (1 << FRAG_RESULT_COLOR
)) {
763 inputsB
&= ~(1 << FRAG_ATTRIB_COL0
);
765 newProg
->InputsRead
= progA
->InputsRead
| inputsB
;
766 newProg
->OutputsWritten
= progB
->OutputsWritten
;
767 newProg
->SamplersUsed
= progA
->SamplersUsed
| progB
->SamplersUsed
;
771 assert(0); /* XXX todo */
775 * Merge parameters (uniforms, constants, etc)
777 newProg
->Parameters
= _mesa_combine_parameter_lists(progA
->Parameters
,
780 adjust_param_indexes(newInst
+ lenA
, lenB
, numParamsA
);
790 * Scan the given program to find a free register of the given type.
791 * \param regFile - PROGRAM_INPUT, PROGRAM_OUTPUT or PROGRAM_TEMPORARY
794 _mesa_find_free_register(const struct gl_program
*prog
, GLuint regFile
)
796 GLboolean used
[MAX_PROGRAM_TEMPS
];
799 assert(regFile
== PROGRAM_INPUT
||
800 regFile
== PROGRAM_OUTPUT
||
801 regFile
== PROGRAM_TEMPORARY
);
803 _mesa_memset(used
, 0, sizeof(used
));
805 for (i
= 0; i
< prog
->NumInstructions
; i
++) {
806 const struct prog_instruction
*inst
= prog
->Instructions
+ i
;
807 const GLuint n
= _mesa_num_inst_src_regs(inst
->Opcode
);
809 /* check dst reg first */
810 if (inst
->DstReg
.File
== regFile
) {
811 used
[inst
->DstReg
.Index
] = GL_TRUE
;
814 /* check src regs otherwise */
815 for (k
= 0; k
< n
; k
++) {
816 if (inst
->SrcReg
[k
].File
== regFile
) {
817 used
[inst
->SrcReg
[k
].Index
] = GL_TRUE
;
824 for (i
= 0; i
< MAX_PROGRAM_TEMPS
; i
++) {
835 * "Post-process" a GPU program. This is intended to be used for debugging.
836 * Example actions include no-op'ing instructions or changing instruction
840 _mesa_postprocess_program(GLcontext
*ctx
, struct gl_program
*prog
)
842 static const GLfloat white
[4] = { 0.5, 0.5, 0.5, 0.5 };
845 GLint whiteIndex
= _mesa_add_unnamed_constant(prog
->Parameters
,
846 white
, 4, &whiteSwizzle
);
850 for (i
= 0; i
< prog
->NumInstructions
; i
++) {
851 struct prog_instruction
*inst
= prog
->Instructions
+ i
;
852 const GLuint n
= _mesa_num_inst_src_regs(inst
->Opcode
);
856 if (_mesa_is_tex_instruction(inst
->Opcode
)) {
858 /* replace TEX/TXP/TXB with MOV */
859 inst
->Opcode
= OPCODE_MOV
;
860 inst
->DstReg
.WriteMask
= WRITEMASK_XYZW
;
861 inst
->SrcReg
[0].Swizzle
= SWIZZLE_XYZW
;
862 inst
->SrcReg
[0].Negate
= NEGATE_NONE
;
866 /* disable shadow texture mode */
871 if (inst
->Opcode
== OPCODE_TXP
) {
873 inst
->Opcode
= OPCODE_MOV
;
874 inst
->DstReg
.WriteMask
= WRITEMASK_XYZW
;
875 inst
->SrcReg
[0].File
= PROGRAM_CONSTANT
;
876 inst
->SrcReg
[0].Index
= whiteIndex
;
877 inst
->SrcReg
[0].Swizzle
= SWIZZLE_XYZW
;
878 inst
->SrcReg
[0].Negate
= NEGATE_NONE
;
884 inst
->Opcode
= OPCODE_TEX
;