1 /**************************************************************************
3 * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
5 * Copyright 2009 VMware, Inc. 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
9 * "Software"), to deal in the Software without restriction, including
10 * without limitation the rights to use, copy, modify, merge, publish,
11 * distribute, sub license, and/or sell copies of the Software, and to
12 * permit persons to whom the Software is furnished to do so, subject to
13 * the following conditions:
15 * The above copyright notice and this permission notice (including the
16 * next paragraph) shall be included in all copies or substantial portions
19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
20 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
21 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
22 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
23 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
24 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
25 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
27 **************************************************************************/
31 #include "shader/program.h"
32 #include "shader/prog_parameter.h"
33 #include "shader/prog_cache.h"
34 #include "shader/prog_instruction.h"
35 #include "shader/prog_print.h"
36 #include "shader/prog_statevars.h"
37 #include "shader/programopt.h"
38 #include "texenvprogram.h"
42 * Note on texture units:
44 * The number of texture units supported by fixed-function fragment
45 * processing is MAX_TEXTURE_COORD_UNITS, not MAX_TEXTURE_IMAGE_UNITS.
46 * That's because there's a one-to-one correspondence between texture
47 * coordinates and samplers in fixed-function processing.
49 * Since fixed-function vertex processing is limited to MAX_TEXTURE_COORD_UNITS
50 * sets of texcoords, so is fixed-function fragment processing.
52 * We can safely use ctx->Const.MaxTextureUnits for loop bounds.
56 struct texenvprog_cache_item
60 struct gl_fragment_program
*data
;
61 struct texenvprog_cache_item
*next
;
65 texenv_doing_secondary_color(GLcontext
*ctx
)
67 if (ctx
->Light
.Enabled
&&
68 (ctx
->Light
.Model
.ColorControl
== GL_SEPARATE_SPECULAR_COLOR
))
71 if (ctx
->Fog
.ColorSumEnabled
)
78 * Up to nine instructions per tex unit, plus fog, specular color.
80 #define MAX_INSTRUCTIONS ((MAX_TEXTURE_COORD_UNITS * 9) + 12)
82 #define DISASSEM (MESA_VERBOSE & VERBOSE_DISASSEM)
86 __extension__ GLubyte Source
:4; /**< SRC_x */
87 __extension__ GLubyte Operand
:3; /**< OPR_x */
89 GLubyte Source
; /**< SRC_x */
90 GLubyte Operand
; /**< OPR_x */
95 GLuint nr_enabled_units
:8;
96 GLuint enabled_units
:8;
97 GLuint separate_specular
:1;
99 GLuint fog_mode
:2; /**< FOG_x */
100 GLuint inputs_available
:12;
104 GLuint source_index
:3; /**< TEXTURE_x_INDEX */
106 GLuint ScaleShiftRGB
:2;
107 GLuint ScaleShiftA
:2;
109 GLuint NumArgsRGB
:3; /**< up to MAX_COMBINER_TERMS */
110 GLuint ModeRGB
:5; /**< MODE_x */
112 GLuint NumArgsA
:3; /**< up to MAX_COMBINER_TERMS */
113 GLuint ModeA
:5; /**< MODE_x */
115 struct mode_opt OptRGB
[MAX_COMBINER_TERMS
];
116 struct mode_opt OptA
[MAX_COMBINER_TERMS
];
117 } unit
[MAX_TEXTURE_UNITS
];
123 #define FOG_UNKNOWN 3
125 static GLuint
translate_fog_mode( GLenum mode
)
128 case GL_LINEAR
: return FOG_LINEAR
;
129 case GL_EXP
: return FOG_EXP
;
130 case GL_EXP2
: return FOG_EXP2
;
131 default: return FOG_UNKNOWN
;
135 #define OPR_SRC_COLOR 0
136 #define OPR_ONE_MINUS_SRC_COLOR 1
137 #define OPR_SRC_ALPHA 2
138 #define OPR_ONE_MINUS_SRC_ALPHA 3
141 #define OPR_UNKNOWN 7
143 static GLuint
translate_operand( GLenum operand
)
146 case GL_SRC_COLOR
: return OPR_SRC_COLOR
;
147 case GL_ONE_MINUS_SRC_COLOR
: return OPR_ONE_MINUS_SRC_COLOR
;
148 case GL_SRC_ALPHA
: return OPR_SRC_ALPHA
;
149 case GL_ONE_MINUS_SRC_ALPHA
: return OPR_ONE_MINUS_SRC_ALPHA
;
150 case GL_ZERO
: return OPR_ZERO
;
151 case GL_ONE
: return OPR_ONE
;
158 #define SRC_TEXTURE 0
159 #define SRC_TEXTURE0 1
160 #define SRC_TEXTURE1 2
161 #define SRC_TEXTURE2 3
162 #define SRC_TEXTURE3 4
163 #define SRC_TEXTURE4 5
164 #define SRC_TEXTURE5 6
165 #define SRC_TEXTURE6 7
166 #define SRC_TEXTURE7 8
167 #define SRC_CONSTANT 9
168 #define SRC_PRIMARY_COLOR 10
169 #define SRC_PREVIOUS 11
171 #define SRC_UNKNOWN 15
173 static GLuint
translate_source( GLenum src
)
176 case GL_TEXTURE
: return SRC_TEXTURE
;
184 case GL_TEXTURE7
: return SRC_TEXTURE0
+ (src
- GL_TEXTURE0
);
185 case GL_CONSTANT
: return SRC_CONSTANT
;
186 case GL_PRIMARY_COLOR
: return SRC_PRIMARY_COLOR
;
187 case GL_PREVIOUS
: return SRC_PREVIOUS
;
196 #define MODE_REPLACE 0 /* r = a0 */
197 #define MODE_MODULATE 1 /* r = a0 * a1 */
198 #define MODE_ADD 2 /* r = a0 + a1 */
199 #define MODE_ADD_SIGNED 3 /* r = a0 + a1 - 0.5 */
200 #define MODE_INTERPOLATE 4 /* r = a0 * a2 + a1 * (1 - a2) */
201 #define MODE_SUBTRACT 5 /* r = a0 - a1 */
202 #define MODE_DOT3_RGB 6 /* r = a0 . a1 */
203 #define MODE_DOT3_RGB_EXT 7 /* r = a0 . a1 */
204 #define MODE_DOT3_RGBA 8 /* r = a0 . a1 */
205 #define MODE_DOT3_RGBA_EXT 9 /* r = a0 . a1 */
206 #define MODE_MODULATE_ADD_ATI 10 /* r = a0 * a2 + a1 */
207 #define MODE_MODULATE_SIGNED_ADD_ATI 11 /* r = a0 * a2 + a1 - 0.5 */
208 #define MODE_MODULATE_SUBTRACT_ATI 12 /* r = a0 * a2 - a1 */
209 #define MODE_ADD_PRODUCTS 13 /* r = a0 * a1 + a2 * a3 */
210 #define MODE_ADD_PRODUCTS_SIGNED 14 /* r = a0 * a1 + a2 * a3 - 0.5 */
211 #define MODE_BUMP_ENVMAP_ATI 15 /* special */
212 #define MODE_UNKNOWN 16
215 * Translate GL combiner state into a MODE_x value
217 static GLuint
translate_mode( GLenum envMode
, GLenum mode
)
220 case GL_REPLACE
: return MODE_REPLACE
;
221 case GL_MODULATE
: return MODE_MODULATE
;
223 if (envMode
== GL_COMBINE4_NV
)
224 return MODE_ADD_PRODUCTS
;
228 if (envMode
== GL_COMBINE4_NV
)
229 return MODE_ADD_PRODUCTS_SIGNED
;
231 return MODE_ADD_SIGNED
;
232 case GL_INTERPOLATE
: return MODE_INTERPOLATE
;
233 case GL_SUBTRACT
: return MODE_SUBTRACT
;
234 case GL_DOT3_RGB
: return MODE_DOT3_RGB
;
235 case GL_DOT3_RGB_EXT
: return MODE_DOT3_RGB_EXT
;
236 case GL_DOT3_RGBA
: return MODE_DOT3_RGBA
;
237 case GL_DOT3_RGBA_EXT
: return MODE_DOT3_RGBA_EXT
;
238 case GL_MODULATE_ADD_ATI
: return MODE_MODULATE_ADD_ATI
;
239 case GL_MODULATE_SIGNED_ADD_ATI
: return MODE_MODULATE_SIGNED_ADD_ATI
;
240 case GL_MODULATE_SUBTRACT_ATI
: return MODE_MODULATE_SUBTRACT_ATI
;
241 case GL_BUMP_ENVMAP_ATI
: return MODE_BUMP_ENVMAP_ATI
;
250 * Translate TEXTURE_x_BIT to TEXTURE_x_INDEX.
252 static GLuint
translate_tex_src_bit( GLbitfield bit
)
255 return _mesa_ffs(bit
) - 1;
259 #define VERT_BIT_TEX_ANY (0xff << VERT_ATTRIB_TEX0)
260 #define VERT_RESULT_TEX_ANY (0xff << VERT_RESULT_TEX0)
263 * Identify all possible varying inputs. The fragment program will
264 * never reference non-varying inputs, but will track them via state
267 * This function figures out all the inputs that the fragment program
268 * has access to. The bitmask is later reduced to just those which
269 * are actually referenced.
271 static GLbitfield
get_fp_input_mask( GLcontext
*ctx
)
274 const GLboolean vertexShader
= (ctx
->Shader
.CurrentProgram
&&
275 ctx
->Shader
.CurrentProgram
->LinkStatus
&&
276 ctx
->Shader
.CurrentProgram
->VertexProgram
);
277 const GLboolean vertexProgram
= ctx
->VertexProgram
._Enabled
;
278 GLbitfield fp_inputs
= 0x0;
280 if (ctx
->VertexProgram
._Overriden
) {
281 /* Somebody's messing with the vertex program and we don't have
282 * a clue what's happening. Assume that it could be producing
283 * all possible outputs.
287 else if (ctx
->RenderMode
== GL_FEEDBACK
) {
288 /* _NEW_RENDERMODE */
289 fp_inputs
= (FRAG_BIT_COL0
| FRAG_BIT_TEX0
);
291 else if (!(vertexProgram
|| vertexShader
) ||
292 !ctx
->VertexProgram
._Current
) {
293 /* Fixed function vertex logic */
295 GLbitfield varying_inputs
= ctx
->varying_vp_inputs
;
297 /* These get generated in the setup routine regardless of the
301 if (ctx
->Point
.PointSprite
)
302 varying_inputs
|= FRAG_BITS_TEX_ANY
;
304 /* First look at what values may be computed by the generated
308 if (ctx
->Light
.Enabled
) {
309 fp_inputs
|= FRAG_BIT_COL0
;
311 if (texenv_doing_secondary_color(ctx
))
312 fp_inputs
|= FRAG_BIT_COL1
;
316 fp_inputs
|= (ctx
->Texture
._TexGenEnabled
|
317 ctx
->Texture
._TexMatEnabled
) << FRAG_ATTRIB_TEX0
;
319 /* Then look at what might be varying as a result of enabled
322 if (varying_inputs
& VERT_BIT_COLOR0
)
323 fp_inputs
|= FRAG_BIT_COL0
;
324 if (varying_inputs
& VERT_BIT_COLOR1
)
325 fp_inputs
|= FRAG_BIT_COL1
;
327 fp_inputs
|= (((varying_inputs
& VERT_BIT_TEX_ANY
) >> VERT_ATTRIB_TEX0
)
328 << FRAG_ATTRIB_TEX0
);
332 /* calculate from vp->outputs */
333 struct gl_vertex_program
*vprog
;
334 GLbitfield vp_outputs
;
336 /* Choose GLSL vertex shader over ARB vertex program. Need this
337 * since vertex shader state validation comes after fragment state
338 * validation (see additional comments in state.c).
341 vprog
= ctx
->Shader
.CurrentProgram
->VertexProgram
;
343 vprog
= ctx
->VertexProgram
.Current
;
345 vp_outputs
= vprog
->Base
.OutputsWritten
;
347 /* These get generated in the setup routine regardless of the
351 if (ctx
->Point
.PointSprite
)
352 vp_outputs
|= FRAG_BITS_TEX_ANY
;
354 if (vp_outputs
& (1 << VERT_RESULT_COL0
))
355 fp_inputs
|= FRAG_BIT_COL0
;
356 if (vp_outputs
& (1 << VERT_RESULT_COL1
))
357 fp_inputs
|= FRAG_BIT_COL1
;
359 fp_inputs
|= (((vp_outputs
& VERT_RESULT_TEX_ANY
) >> VERT_RESULT_TEX0
)
360 << FRAG_ATTRIB_TEX0
);
368 * Examine current texture environment state and generate a unique
369 * key to identify it.
371 static void make_state_key( GLcontext
*ctx
, struct state_key
*key
)
374 GLbitfield inputs_referenced
= FRAG_BIT_COL0
;
375 const GLbitfield inputs_available
= get_fp_input_mask( ctx
);
377 memset(key
, 0, sizeof(*key
));
380 for (i
= 0; i
< ctx
->Const
.MaxTextureUnits
; i
++) {
381 const struct gl_texture_unit
*texUnit
= &ctx
->Texture
.Unit
[i
];
382 const struct gl_texture_object
*texObj
= texUnit
->_Current
;
383 const struct gl_tex_env_combine_state
*comb
= texUnit
->_CurrentCombine
;
386 if (!texUnit
->_ReallyEnabled
|| !texUnit
->Enabled
)
389 format
= texObj
->Image
[0][texObj
->BaseLevel
]->_BaseFormat
;
391 key
->unit
[i
].enabled
= 1;
392 key
->enabled_units
|= (1<<i
);
393 key
->nr_enabled_units
= i
+1;
394 inputs_referenced
|= FRAG_BIT_TEX(i
);
396 key
->unit
[i
].source_index
=
397 translate_tex_src_bit(texUnit
->_ReallyEnabled
);
399 key
->unit
[i
].shadow
= ((texObj
->CompareMode
== GL_COMPARE_R_TO_TEXTURE
) &&
400 ((format
== GL_DEPTH_COMPONENT
) ||
401 (format
== GL_DEPTH_STENCIL_EXT
)));
403 key
->unit
[i
].NumArgsRGB
= comb
->_NumArgsRGB
;
404 key
->unit
[i
].NumArgsA
= comb
->_NumArgsA
;
406 key
->unit
[i
].ModeRGB
=
407 translate_mode(texUnit
->EnvMode
, comb
->ModeRGB
);
409 translate_mode(texUnit
->EnvMode
, comb
->ModeA
);
411 key
->unit
[i
].ScaleShiftRGB
= comb
->ScaleShiftRGB
;
412 key
->unit
[i
].ScaleShiftA
= comb
->ScaleShiftA
;
414 for (j
= 0; j
< MAX_COMBINER_TERMS
; j
++) {
415 key
->unit
[i
].OptRGB
[j
].Operand
= translate_operand(comb
->OperandRGB
[j
]);
416 key
->unit
[i
].OptA
[j
].Operand
= translate_operand(comb
->OperandA
[j
]);
417 key
->unit
[i
].OptRGB
[j
].Source
= translate_source(comb
->SourceRGB
[j
]);
418 key
->unit
[i
].OptA
[j
].Source
= translate_source(comb
->SourceA
[j
]);
421 if (key
->unit
[i
].ModeRGB
== MODE_BUMP_ENVMAP_ATI
) {
422 /* requires some special translation */
423 key
->unit
[i
].NumArgsRGB
= 2;
424 key
->unit
[i
].ScaleShiftRGB
= 0;
425 key
->unit
[i
].OptRGB
[0].Operand
= OPR_SRC_COLOR
;
426 key
->unit
[i
].OptRGB
[0].Source
= SRC_TEXTURE
;
427 key
->unit
[i
].OptRGB
[1].Operand
= OPR_SRC_COLOR
;
428 key
->unit
[i
].OptRGB
[1].Source
= texUnit
->BumpTarget
- GL_TEXTURE0
+ SRC_TEXTURE0
;
432 /* _NEW_LIGHT | _NEW_FOG */
433 if (texenv_doing_secondary_color(ctx
)) {
434 key
->separate_specular
= 1;
435 inputs_referenced
|= FRAG_BIT_COL1
;
439 if (ctx
->Fog
.Enabled
) {
440 key
->fog_enabled
= 1;
441 key
->fog_mode
= translate_fog_mode(ctx
->Fog
.Mode
);
442 inputs_referenced
|= FRAG_BIT_FOGC
; /* maybe */
445 key
->inputs_available
= (inputs_available
& inputs_referenced
);
449 * Use uregs to represent registers internally, translate to Mesa's
450 * expected formats on emit.
452 * NOTE: These are passed by value extensively in this file rather
453 * than as usual by pointer reference. If this disturbs you, try
454 * remembering they are just 32bits in size.
456 * GCC is smart enough to deal with these dword-sized structures in
457 * much the same way as if I had defined them as dwords and was using
458 * macros to access and set the fields. This is much nicer and easier
469 static const struct ureg undef
= {
478 /** State used to build the fragment program:
480 struct texenv_fragment_program
{
481 struct gl_fragment_program
*program
;
482 struct state_key
*state
;
484 GLbitfield alu_temps
; /**< Track texture indirections, see spec. */
485 GLbitfield temps_output
; /**< Track texture indirections, see spec. */
486 GLbitfield temp_in_use
; /**< Tracks temporary regs which are in use. */
489 struct ureg src_texture
[MAX_TEXTURE_COORD_UNITS
];
490 /* Reg containing each texture unit's sampled texture color,
494 struct ureg texcoord_tex
[MAX_TEXTURE_COORD_UNITS
];
495 /* Reg containing texcoord for a texture unit,
496 * needed for bump mapping, else undef.
499 struct ureg src_previous
; /**< Reg containing color from previous
500 * stage. May need to be decl'd.
503 GLuint last_tex_stage
; /**< Number of last enabled texture unit */
512 static struct ureg
make_ureg(GLuint file
, GLuint idx
)
518 reg
.swz
= SWIZZLE_NOOP
;
523 static struct ureg
swizzle( struct ureg reg
, int x
, int y
, int z
, int w
)
525 reg
.swz
= MAKE_SWIZZLE4(GET_SWZ(reg
.swz
, x
),
528 GET_SWZ(reg
.swz
, w
));
533 static struct ureg
swizzle1( struct ureg reg
, int x
)
535 return swizzle(reg
, x
, x
, x
, x
);
538 static struct ureg
negate( struct ureg reg
)
544 static GLboolean
is_undef( struct ureg reg
)
546 return reg
.file
== PROGRAM_UNDEFINED
;
550 static struct ureg
get_temp( struct texenv_fragment_program
*p
)
554 /* First try and reuse temps which have been used already:
556 bit
= _mesa_ffs( ~p
->temp_in_use
& p
->alu_temps
);
558 /* Then any unused temporary:
561 bit
= _mesa_ffs( ~p
->temp_in_use
);
564 _mesa_problem(NULL
, "%s: out of temporaries\n", __FILE__
);
568 if ((GLuint
) bit
> p
->program
->Base
.NumTemporaries
)
569 p
->program
->Base
.NumTemporaries
= bit
;
571 p
->temp_in_use
|= 1<<(bit
-1);
572 return make_ureg(PROGRAM_TEMPORARY
, (bit
-1));
575 static struct ureg
get_tex_temp( struct texenv_fragment_program
*p
)
579 /* First try to find available temp not previously used (to avoid
580 * starting a new texture indirection). According to the spec, the
581 * ~p->temps_output isn't necessary, but will keep it there for
584 bit
= _mesa_ffs( ~p
->temp_in_use
& ~p
->alu_temps
& ~p
->temps_output
);
586 /* Then any unused temporary:
589 bit
= _mesa_ffs( ~p
->temp_in_use
);
592 _mesa_problem(NULL
, "%s: out of temporaries\n", __FILE__
);
596 if ((GLuint
) bit
> p
->program
->Base
.NumTemporaries
)
597 p
->program
->Base
.NumTemporaries
= bit
;
599 p
->temp_in_use
|= 1<<(bit
-1);
600 return make_ureg(PROGRAM_TEMPORARY
, (bit
-1));
604 /** Mark a temp reg as being no longer allocatable. */
605 static void reserve_temp( struct texenv_fragment_program
*p
, struct ureg r
)
607 if (r
.file
== PROGRAM_TEMPORARY
)
608 p
->temps_output
|= (1 << r
.idx
);
612 static void release_temps(GLcontext
*ctx
, struct texenv_fragment_program
*p
)
614 GLuint max_temp
= ctx
->Const
.FragmentProgram
.MaxTemps
;
616 /* KW: To support tex_env_crossbar, don't release the registers in
619 if (max_temp
>= sizeof(int) * 8)
620 p
->temp_in_use
= p
->temps_output
;
622 p
->temp_in_use
= ~((1<<max_temp
)-1) | p
->temps_output
;
626 static struct ureg
register_param5( struct texenv_fragment_program
*p
,
633 gl_state_index tokens
[STATE_LENGTH
];
640 idx
= _mesa_add_state_reference( p
->program
->Base
.Parameters
, tokens
);
641 return make_ureg(PROGRAM_STATE_VAR
, idx
);
645 #define register_param1(p,s0) register_param5(p,s0,0,0,0,0)
646 #define register_param2(p,s0,s1) register_param5(p,s0,s1,0,0,0)
647 #define register_param3(p,s0,s1,s2) register_param5(p,s0,s1,s2,0,0)
648 #define register_param4(p,s0,s1,s2,s3) register_param5(p,s0,s1,s2,s3,0)
650 static GLuint
frag_to_vert_attrib( GLuint attrib
)
653 case FRAG_ATTRIB_COL0
: return VERT_ATTRIB_COLOR0
;
654 case FRAG_ATTRIB_COL1
: return VERT_ATTRIB_COLOR1
;
656 assert(attrib
>= FRAG_ATTRIB_TEX0
);
657 assert(attrib
<= FRAG_ATTRIB_TEX7
);
658 return attrib
- FRAG_ATTRIB_TEX0
+ VERT_ATTRIB_TEX0
;
663 static struct ureg
register_input( struct texenv_fragment_program
*p
, GLuint input
)
665 if (p
->state
->inputs_available
& (1<<input
)) {
666 p
->program
->Base
.InputsRead
|= (1 << input
);
667 return make_ureg(PROGRAM_INPUT
, input
);
670 GLuint idx
= frag_to_vert_attrib( input
);
671 return register_param3( p
, STATE_INTERNAL
, STATE_CURRENT_ATTRIB
, idx
);
676 static void emit_arg( struct prog_src_register
*reg
,
679 reg
->File
= ureg
.file
;
680 reg
->Index
= ureg
.idx
;
681 reg
->Swizzle
= ureg
.swz
;
682 reg
->Negate
= ureg
.negatebase
? NEGATE_XYZW
: NEGATE_NONE
;
686 static void emit_dst( struct prog_dst_register
*dst
,
687 struct ureg ureg
, GLuint mask
)
689 dst
->File
= ureg
.file
;
690 dst
->Index
= ureg
.idx
;
691 dst
->WriteMask
= mask
;
692 dst
->CondMask
= COND_TR
; /* always pass cond test */
693 dst
->CondSwizzle
= SWIZZLE_NOOP
;
696 static struct prog_instruction
*
697 emit_op(struct texenv_fragment_program
*p
,
706 const GLuint nr
= p
->program
->Base
.NumInstructions
++;
707 struct prog_instruction
*inst
= &p
->program
->Base
.Instructions
[nr
];
709 assert(nr
< MAX_INSTRUCTIONS
);
711 _mesa_init_instructions(inst
, 1);
714 emit_arg( &inst
->SrcReg
[0], src0
);
715 emit_arg( &inst
->SrcReg
[1], src1
);
716 emit_arg( &inst
->SrcReg
[2], src2
);
718 inst
->SaturateMode
= saturate
? SATURATE_ZERO_ONE
: SATURATE_OFF
;
720 emit_dst( &inst
->DstReg
, dest
, mask
);
723 /* Accounting for indirection tracking:
725 if (dest
.file
== PROGRAM_TEMPORARY
)
726 p
->temps_output
|= 1 << dest
.idx
;
733 static struct ureg
emit_arith( struct texenv_fragment_program
*p
,
742 emit_op(p
, op
, dest
, mask
, saturate
, src0
, src1
, src2
);
744 /* Accounting for indirection tracking:
746 if (src0
.file
== PROGRAM_TEMPORARY
)
747 p
->alu_temps
|= 1 << src0
.idx
;
749 if (!is_undef(src1
) && src1
.file
== PROGRAM_TEMPORARY
)
750 p
->alu_temps
|= 1 << src1
.idx
;
752 if (!is_undef(src2
) && src2
.file
== PROGRAM_TEMPORARY
)
753 p
->alu_temps
|= 1 << src2
.idx
;
755 if (dest
.file
== PROGRAM_TEMPORARY
)
756 p
->alu_temps
|= 1 << dest
.idx
;
758 p
->program
->Base
.NumAluInstructions
++;
762 static struct ureg
emit_texld( struct texenv_fragment_program
*p
,
771 struct prog_instruction
*inst
= emit_op( p
, op
,
773 GL_FALSE
, /* don't saturate? */
778 inst
->TexSrcTarget
= tex_idx
;
779 inst
->TexSrcUnit
= tex_unit
;
780 inst
->TexShadow
= tex_shadow
;
782 p
->program
->Base
.NumTexInstructions
++;
784 /* Accounting for indirection tracking:
786 reserve_temp(p
, dest
);
789 /* Is this a texture indirection?
791 if ((coord
.file
== PROGRAM_TEMPORARY
&&
792 (p
->temps_output
& (1<<coord
.idx
))) ||
793 (dest
.file
== PROGRAM_TEMPORARY
&&
794 (p
->alu_temps
& (1<<dest
.idx
)))) {
795 p
->program
->Base
.NumTexIndirections
++;
796 p
->temps_output
= 1<<coord
.idx
;
798 assert(0); /* KW: texture env crossbar */
806 static struct ureg
register_const4f( struct texenv_fragment_program
*p
,
819 idx
= _mesa_add_unnamed_constant( p
->program
->Base
.Parameters
, values
, 4,
821 r
= make_ureg(PROGRAM_CONSTANT
, idx
);
826 #define register_scalar_const(p, s0) register_const4f(p, s0, s0, s0, s0)
827 #define register_const1f(p, s0) register_const4f(p, s0, 0, 0, 1)
828 #define register_const2f(p, s0, s1) register_const4f(p, s0, s1, 0, 1)
829 #define register_const3f(p, s0, s1, s2) register_const4f(p, s0, s1, s2, 1)
832 static struct ureg
get_one( struct texenv_fragment_program
*p
)
834 if (is_undef(p
->one
))
835 p
->one
= register_scalar_const(p
, 1.0);
839 static struct ureg
get_half( struct texenv_fragment_program
*p
)
841 if (is_undef(p
->half
))
842 p
->half
= register_scalar_const(p
, 0.5);
846 static struct ureg
get_zero( struct texenv_fragment_program
*p
)
848 if (is_undef(p
->zero
))
849 p
->zero
= register_scalar_const(p
, 0.0);
854 static void program_error( struct texenv_fragment_program
*p
, const char *msg
)
856 _mesa_problem(NULL
, msg
);
860 static struct ureg
get_source( struct texenv_fragment_program
*p
,
861 GLuint src
, GLuint unit
)
865 assert(!is_undef(p
->src_texture
[unit
]));
866 return p
->src_texture
[unit
];
876 assert(!is_undef(p
->src_texture
[src
- SRC_TEXTURE0
]));
877 return p
->src_texture
[src
- SRC_TEXTURE0
];
880 return register_param2(p
, STATE_TEXENV_COLOR
, unit
);
882 case SRC_PRIMARY_COLOR
:
883 return register_input(p
, FRAG_ATTRIB_COL0
);
889 if (is_undef(p
->src_previous
))
890 return register_input(p
, FRAG_ATTRIB_COL0
);
892 return p
->src_previous
;
900 static struct ureg
emit_combine_source( struct texenv_fragment_program
*p
,
906 struct ureg arg
, src
, one
;
908 src
= get_source(p
, source
, unit
);
911 case OPR_ONE_MINUS_SRC_COLOR
:
913 * Emit tmp = 1.0 - arg.xyzw
917 return emit_arith( p
, OPCODE_SUB
, arg
, mask
, 0, one
, src
, undef
);
920 if (mask
== WRITEMASK_W
)
923 return swizzle1( src
, SWIZZLE_W
);
924 case OPR_ONE_MINUS_SRC_ALPHA
:
926 * Emit tmp = 1.0 - arg.wwww
930 return emit_arith(p
, OPCODE_SUB
, arg
, mask
, 0,
931 one
, swizzle1(src
, SWIZZLE_W
), undef
);
945 * Check if the RGB and Alpha sources and operands match for the given
946 * texture unit's combinder state. When the RGB and A sources and
947 * operands match, we can emit fewer instructions.
949 static GLboolean
args_match( const struct state_key
*key
, GLuint unit
)
951 GLuint i
, numArgs
= key
->unit
[unit
].NumArgsRGB
;
953 for (i
= 0; i
< numArgs
; i
++) {
954 if (key
->unit
[unit
].OptA
[i
].Source
!= key
->unit
[unit
].OptRGB
[i
].Source
)
957 switch (key
->unit
[unit
].OptA
[i
].Operand
) {
959 switch (key
->unit
[unit
].OptRGB
[i
].Operand
) {
967 case OPR_ONE_MINUS_SRC_ALPHA
:
968 switch (key
->unit
[unit
].OptRGB
[i
].Operand
) {
969 case OPR_ONE_MINUS_SRC_COLOR
:
970 case OPR_ONE_MINUS_SRC_ALPHA
:
977 return GL_FALSE
; /* impossible */
984 static struct ureg
emit_combine( struct texenv_fragment_program
*p
,
991 const struct mode_opt
*opt
)
993 struct ureg src
[MAX_COMBINER_TERMS
];
994 struct ureg tmp
, half
;
997 assert(nr
<= MAX_COMBINER_TERMS
);
999 tmp
= undef
; /* silence warning (bug 5318) */
1001 for (i
= 0; i
< nr
; i
++)
1002 src
[i
] = emit_combine_source( p
, mask
, unit
, opt
[i
].Source
, opt
[i
].Operand
);
1006 if (mask
== WRITEMASK_XYZW
&& !saturate
)
1009 return emit_arith( p
, OPCODE_MOV
, dest
, mask
, saturate
, src
[0], undef
, undef
);
1011 return emit_arith( p
, OPCODE_MUL
, dest
, mask
, saturate
,
1012 src
[0], src
[1], undef
);
1014 return emit_arith( p
, OPCODE_ADD
, dest
, mask
, saturate
,
1015 src
[0], src
[1], undef
);
1016 case MODE_ADD_SIGNED
:
1017 /* tmp = arg0 + arg1
1021 tmp
= get_temp( p
);
1022 emit_arith( p
, OPCODE_ADD
, tmp
, mask
, 0, src
[0], src
[1], undef
);
1023 emit_arith( p
, OPCODE_SUB
, dest
, mask
, saturate
, tmp
, half
, undef
);
1025 case MODE_INTERPOLATE
:
1026 /* Arg0 * (Arg2) + Arg1 * (1-Arg2) -- note arguments are reordered:
1028 return emit_arith( p
, OPCODE_LRP
, dest
, mask
, saturate
, src
[2], src
[0], src
[1] );
1031 return emit_arith( p
, OPCODE_SUB
, dest
, mask
, saturate
, src
[0], src
[1], undef
);
1033 case MODE_DOT3_RGBA
:
1034 case MODE_DOT3_RGBA_EXT
:
1035 case MODE_DOT3_RGB_EXT
:
1036 case MODE_DOT3_RGB
: {
1037 struct ureg tmp0
= get_temp( p
);
1038 struct ureg tmp1
= get_temp( p
);
1039 struct ureg neg1
= register_scalar_const(p
, -1);
1040 struct ureg two
= register_scalar_const(p
, 2);
1042 /* tmp0 = 2*src0 - 1
1045 * dst = tmp0 dot3 tmp1
1047 emit_arith( p
, OPCODE_MAD
, tmp0
, WRITEMASK_XYZW
, 0,
1050 if (_mesa_memcmp(&src
[0], &src
[1], sizeof(struct ureg
)) == 0)
1053 emit_arith( p
, OPCODE_MAD
, tmp1
, WRITEMASK_XYZW
, 0,
1055 emit_arith( p
, OPCODE_DP3
, dest
, mask
, saturate
, tmp0
, tmp1
, undef
);
1058 case MODE_MODULATE_ADD_ATI
:
1059 /* Arg0 * Arg2 + Arg1 */
1060 return emit_arith( p
, OPCODE_MAD
, dest
, mask
, saturate
,
1061 src
[0], src
[2], src
[1] );
1062 case MODE_MODULATE_SIGNED_ADD_ATI
: {
1063 /* Arg0 * Arg2 + Arg1 - 0.5 */
1064 struct ureg tmp0
= get_temp(p
);
1066 emit_arith( p
, OPCODE_MAD
, tmp0
, mask
, 0, src
[0], src
[2], src
[1] );
1067 emit_arith( p
, OPCODE_SUB
, dest
, mask
, saturate
, tmp0
, half
, undef
);
1070 case MODE_MODULATE_SUBTRACT_ATI
:
1071 /* Arg0 * Arg2 - Arg1 */
1072 emit_arith( p
, OPCODE_MAD
, dest
, mask
, 0, src
[0], src
[2], negate(src
[1]) );
1074 case MODE_ADD_PRODUCTS
:
1075 /* Arg0 * Arg1 + Arg2 * Arg3 */
1077 struct ureg tmp0
= get_temp(p
);
1078 emit_arith( p
, OPCODE_MUL
, tmp0
, mask
, 0, src
[0], src
[1], undef
);
1079 emit_arith( p
, OPCODE_MAD
, dest
, mask
, saturate
, src
[2], src
[3], tmp0
);
1082 case MODE_ADD_PRODUCTS_SIGNED
:
1083 /* Arg0 * Arg1 + Arg2 * Arg3 - 0.5 */
1085 struct ureg tmp0
= get_temp(p
);
1087 emit_arith( p
, OPCODE_MUL
, tmp0
, mask
, 0, src
[0], src
[1], undef
);
1088 emit_arith( p
, OPCODE_MAD
, tmp0
, mask
, 0, src
[2], src
[3], tmp0
);
1089 emit_arith( p
, OPCODE_SUB
, dest
, mask
, saturate
, tmp0
, half
, undef
);
1092 case MODE_BUMP_ENVMAP_ATI
:
1093 /* special - not handled here */
1104 * Generate instructions for one texture unit's env/combiner mode.
1107 emit_texenv(struct texenv_fragment_program
*p
, GLuint unit
)
1109 const struct state_key
*key
= p
->state
;
1111 GLuint rgb_shift
, alpha_shift
;
1112 struct ureg out
, dest
;
1114 if (!key
->unit
[unit
].enabled
) {
1115 return get_source(p
, SRC_PREVIOUS
, 0);
1117 if (key
->unit
[unit
].ModeRGB
== MODE_BUMP_ENVMAP_ATI
) {
1118 /* this isn't really a env stage delivering a color and handled elsewhere */
1119 return get_source(p
, SRC_PREVIOUS
, 0);
1122 switch (key
->unit
[unit
].ModeRGB
) {
1123 case MODE_DOT3_RGB_EXT
:
1124 alpha_shift
= key
->unit
[unit
].ScaleShiftA
;
1127 case MODE_DOT3_RGBA_EXT
:
1132 rgb_shift
= key
->unit
[unit
].ScaleShiftRGB
;
1133 alpha_shift
= key
->unit
[unit
].ScaleShiftA
;
1137 /* If we'll do rgb/alpha shifting don't saturate in emit_combine().
1138 * We don't want to clamp twice.
1140 saturate
= !(rgb_shift
|| alpha_shift
);
1142 /* If this is the very last calculation, emit direct to output reg:
1144 if (key
->separate_specular
||
1145 unit
!= p
->last_tex_stage
||
1148 dest
= get_temp( p
);
1150 dest
= make_ureg(PROGRAM_OUTPUT
, FRAG_RESULT_COLOR
);
1152 /* Emit the RGB and A combine ops
1154 if (key
->unit
[unit
].ModeRGB
== key
->unit
[unit
].ModeA
&&
1155 args_match(key
, unit
)) {
1156 out
= emit_combine( p
, dest
, WRITEMASK_XYZW
, saturate
,
1158 key
->unit
[unit
].NumArgsRGB
,
1159 key
->unit
[unit
].ModeRGB
,
1160 key
->unit
[unit
].OptRGB
);
1162 else if (key
->unit
[unit
].ModeRGB
== MODE_DOT3_RGBA_EXT
||
1163 key
->unit
[unit
].ModeRGB
== MODE_DOT3_RGBA
) {
1164 out
= emit_combine( p
, dest
, WRITEMASK_XYZW
, saturate
,
1166 key
->unit
[unit
].NumArgsRGB
,
1167 key
->unit
[unit
].ModeRGB
,
1168 key
->unit
[unit
].OptRGB
);
1171 /* Need to do something to stop from re-emitting identical
1172 * argument calculations here:
1174 out
= emit_combine( p
, dest
, WRITEMASK_XYZ
, saturate
,
1176 key
->unit
[unit
].NumArgsRGB
,
1177 key
->unit
[unit
].ModeRGB
,
1178 key
->unit
[unit
].OptRGB
);
1179 out
= emit_combine( p
, dest
, WRITEMASK_W
, saturate
,
1181 key
->unit
[unit
].NumArgsA
,
1182 key
->unit
[unit
].ModeA
,
1183 key
->unit
[unit
].OptA
);
1186 /* Deal with the final shift:
1188 if (alpha_shift
|| rgb_shift
) {
1191 saturate
= GL_TRUE
; /* always saturate at this point */
1193 if (rgb_shift
== alpha_shift
) {
1194 shift
= register_scalar_const(p
, (GLfloat
)(1<<rgb_shift
));
1197 shift
= register_const4f(p
,
1198 (GLfloat
)(1<<rgb_shift
),
1199 (GLfloat
)(1<<rgb_shift
),
1200 (GLfloat
)(1<<rgb_shift
),
1201 (GLfloat
)(1<<alpha_shift
));
1203 return emit_arith( p
, OPCODE_MUL
, dest
, WRITEMASK_XYZW
,
1204 saturate
, out
, shift
, undef
);
1212 * Generate instruction for getting a texture source term.
1214 static void load_texture( struct texenv_fragment_program
*p
, GLuint unit
)
1216 if (is_undef(p
->src_texture
[unit
])) {
1217 const GLuint texTarget
= p
->state
->unit
[unit
].source_index
;
1218 struct ureg texcoord
;
1219 struct ureg tmp
= get_tex_temp( p
);
1221 if (is_undef(p
->texcoord_tex
[unit
])) {
1222 texcoord
= register_input(p
, FRAG_ATTRIB_TEX0
+unit
);
1225 /* might want to reuse this reg for tex output actually */
1226 texcoord
= p
->texcoord_tex
[unit
];
1229 /* TODO: Use D0_MASK_XY where possible.
1231 if (p
->state
->unit
[unit
].enabled
) {
1232 GLboolean shadow
= GL_FALSE
;
1234 if (p
->state
->unit
[unit
].shadow
) {
1235 p
->program
->Base
.ShadowSamplers
|= 1 << unit
;
1239 p
->src_texture
[unit
] = emit_texld( p
, OPCODE_TXP
,
1240 tmp
, WRITEMASK_XYZW
,
1241 unit
, texTarget
, shadow
,
1244 p
->program
->Base
.SamplersUsed
|= (1 << unit
);
1245 /* This identity mapping should already be in place
1246 * (see _mesa_init_program_struct()) but let's be safe.
1248 p
->program
->Base
.SamplerUnits
[unit
] = unit
;
1251 p
->src_texture
[unit
] = get_zero(p
);
1255 static GLboolean
load_texenv_source( struct texenv_fragment_program
*p
,
1256 GLuint src
, GLuint unit
)
1260 load_texture(p
, unit
);
1271 load_texture(p
, src
- SRC_TEXTURE0
);
1275 /* not a texture src - do nothing */
1284 * Generate instructions for loading all texture source terms.
1287 load_texunit_sources( struct texenv_fragment_program
*p
, GLuint unit
)
1289 const struct state_key
*key
= p
->state
;
1292 for (i
= 0; i
< key
->unit
[unit
].NumArgsRGB
; i
++) {
1293 load_texenv_source( p
, key
->unit
[unit
].OptRGB
[i
].Source
, unit
);
1296 for (i
= 0; i
< key
->unit
[unit
].NumArgsA
; i
++) {
1297 load_texenv_source( p
, key
->unit
[unit
].OptA
[i
].Source
, unit
);
1304 * Generate instructions for loading bump map textures.
1307 load_texunit_bumpmap( struct texenv_fragment_program
*p
, GLuint unit
)
1309 const struct state_key
*key
= p
->state
;
1310 GLuint bumpedUnitNr
= key
->unit
[unit
].OptRGB
[1].Source
- SRC_TEXTURE0
;
1311 struct ureg texcDst
, bumpMapRes
;
1312 struct ureg constdudvcolor
= register_const4f(p
, 0.0, 0.0, 0.0, 1.0);
1313 struct ureg texcSrc
= register_input(p
, FRAG_ATTRIB_TEX0
+ bumpedUnitNr
);
1314 struct ureg rotMat0
= register_param3( p
, STATE_INTERNAL
, STATE_ROT_MATRIX_0
, unit
);
1315 struct ureg rotMat1
= register_param3( p
, STATE_INTERNAL
, STATE_ROT_MATRIX_1
, unit
);
1317 load_texenv_source( p
, unit
+ SRC_TEXTURE0
, unit
);
1319 bumpMapRes
= get_source(p
, key
->unit
[unit
].OptRGB
[0].Source
, unit
);
1320 texcDst
= get_tex_temp( p
);
1321 p
->texcoord_tex
[bumpedUnitNr
] = texcDst
;
1323 /* Apply rot matrix and add coords to be available in next phase.
1324 * dest = (Arg0.xxxx * rotMat0 + Arg1) + (Arg0.yyyy * rotMat1)
1325 * note only 2 coords are affected the rest are left unchanged (mul by 0)
1327 emit_arith( p
, OPCODE_MAD
, texcDst
, WRITEMASK_XYZW
, 0,
1328 swizzle1(bumpMapRes
, SWIZZLE_X
), rotMat0
, texcSrc
);
1329 emit_arith( p
, OPCODE_MAD
, texcDst
, WRITEMASK_XYZW
, 0,
1330 swizzle1(bumpMapRes
, SWIZZLE_Y
), rotMat1
, texcDst
);
1332 /* Move 0,0,0,1 into bumpmap src if someone (crossbar) is foolish
1333 * enough to access this later, should optimize away.
1335 emit_arith( p
, OPCODE_MOV
, bumpMapRes
, WRITEMASK_XYZW
, 0,
1336 constdudvcolor
, undef
, undef
);
1342 * Generate a new fragment program which implements the context's
1343 * current texture env/combine mode.
1346 create_new_program(GLcontext
*ctx
, struct state_key
*key
,
1347 struct gl_fragment_program
*program
)
1349 struct prog_instruction instBuffer
[MAX_INSTRUCTIONS
];
1350 struct texenv_fragment_program p
;
1352 struct ureg cf
, out
;
1354 _mesa_memset(&p
, 0, sizeof(p
));
1356 p
.program
= program
;
1358 /* During code generation, use locally-allocated instruction buffer,
1359 * then alloc dynamic storage below.
1361 p
.program
->Base
.Instructions
= instBuffer
;
1362 p
.program
->Base
.Target
= GL_FRAGMENT_PROGRAM_ARB
;
1363 p
.program
->Base
.String
= NULL
;
1364 p
.program
->Base
.NumTexIndirections
= 1; /* is this right? */
1365 p
.program
->Base
.NumTexInstructions
= 0;
1366 p
.program
->Base
.NumAluInstructions
= 0;
1367 p
.program
->Base
.NumInstructions
= 0;
1368 p
.program
->Base
.NumTemporaries
= 0;
1369 p
.program
->Base
.NumParameters
= 0;
1370 p
.program
->Base
.NumAttributes
= 0;
1371 p
.program
->Base
.NumAddressRegs
= 0;
1372 p
.program
->Base
.Parameters
= _mesa_new_parameter_list();
1373 p
.program
->Base
.InputsRead
= 0x0;
1374 p
.program
->Base
.OutputsWritten
= 1 << FRAG_RESULT_COLOR
;
1376 for (unit
= 0; unit
< ctx
->Const
.MaxTextureUnits
; unit
++) {
1377 p
.src_texture
[unit
] = undef
;
1378 p
.texcoord_tex
[unit
] = undef
;
1381 p
.src_previous
= undef
;
1386 p
.last_tex_stage
= 0;
1387 release_temps(ctx
, &p
);
1389 if (key
->enabled_units
) {
1390 GLboolean needbumpstage
= GL_FALSE
;
1392 /* Zeroth pass - bump map textures first */
1393 for (unit
= 0; unit
< ctx
->Const
.MaxTextureUnits
; unit
++)
1394 if (key
->unit
[unit
].enabled
&&
1395 key
->unit
[unit
].ModeRGB
== MODE_BUMP_ENVMAP_ATI
) {
1396 needbumpstage
= GL_TRUE
;
1397 load_texunit_bumpmap( &p
, unit
);
1400 p
.program
->Base
.NumTexIndirections
++;
1402 /* First pass - to support texture_env_crossbar, first identify
1403 * all referenced texture sources and emit texld instructions
1406 for (unit
= 0; unit
< ctx
->Const
.MaxTextureUnits
; unit
++)
1407 if (key
->unit
[unit
].enabled
) {
1408 load_texunit_sources( &p
, unit
);
1409 p
.last_tex_stage
= unit
;
1412 /* Second pass - emit combine instructions to build final color:
1414 for (unit
= 0; unit
< ctx
->Const
.MaxTextureUnits
; unit
++)
1415 if (key
->unit
[unit
].enabled
) {
1416 p
.src_previous
= emit_texenv( &p
, unit
);
1417 reserve_temp(&p
, p
.src_previous
); /* don't re-use this temp reg */
1418 release_temps(ctx
, &p
); /* release all temps */
1422 cf
= get_source( &p
, SRC_PREVIOUS
, 0 );
1423 out
= make_ureg( PROGRAM_OUTPUT
, FRAG_RESULT_COLOR
);
1425 if (key
->separate_specular
) {
1426 /* Emit specular add.
1428 struct ureg s
= register_input(&p
, FRAG_ATTRIB_COL1
);
1429 emit_arith( &p
, OPCODE_ADD
, out
, WRITEMASK_XYZ
, 0, cf
, s
, undef
);
1430 emit_arith( &p
, OPCODE_MOV
, out
, WRITEMASK_W
, 0, cf
, undef
, undef
);
1432 else if (_mesa_memcmp(&cf
, &out
, sizeof(cf
)) != 0) {
1433 /* Will wind up in here if no texture enabled or a couple of
1434 * other scenarios (GL_REPLACE for instance).
1436 emit_arith( &p
, OPCODE_MOV
, out
, WRITEMASK_XYZW
, 0, cf
, undef
, undef
);
1441 emit_arith( &p
, OPCODE_END
, undef
, WRITEMASK_XYZW
, 0, undef
, undef
, undef
);
1443 if (key
->fog_enabled
) {
1444 /* Pull fog mode from GLcontext, the value in the state key is
1445 * a reduced value and not what is expected in FogOption
1447 p
.program
->FogOption
= ctx
->Fog
.Mode
;
1448 p
.program
->Base
.InputsRead
|= FRAG_BIT_FOGC
;
1451 p
.program
->FogOption
= GL_NONE
;
1454 if (p
.program
->Base
.NumTexIndirections
> ctx
->Const
.FragmentProgram
.MaxTexIndirections
)
1455 program_error(&p
, "Exceeded max nr indirect texture lookups");
1457 if (p
.program
->Base
.NumTexInstructions
> ctx
->Const
.FragmentProgram
.MaxTexInstructions
)
1458 program_error(&p
, "Exceeded max TEX instructions");
1460 if (p
.program
->Base
.NumAluInstructions
> ctx
->Const
.FragmentProgram
.MaxAluInstructions
)
1461 program_error(&p
, "Exceeded max ALU instructions");
1463 ASSERT(p
.program
->Base
.NumInstructions
<= MAX_INSTRUCTIONS
);
1465 /* Allocate final instruction array */
1466 p
.program
->Base
.Instructions
1467 = _mesa_alloc_instructions(p
.program
->Base
.NumInstructions
);
1468 if (!p
.program
->Base
.Instructions
) {
1469 _mesa_error(ctx
, GL_OUT_OF_MEMORY
,
1470 "generating tex env program");
1473 _mesa_copy_instructions(p
.program
->Base
.Instructions
, instBuffer
,
1474 p
.program
->Base
.NumInstructions
);
1476 if (p
.program
->FogOption
) {
1477 _mesa_append_fog_code(ctx
, p
.program
);
1478 p
.program
->FogOption
= GL_NONE
;
1482 /* Notify driver the fragment program has (actually) changed.
1484 if (ctx
->Driver
.ProgramStringNotify
) {
1485 ctx
->Driver
.ProgramStringNotify( ctx
, GL_FRAGMENT_PROGRAM_ARB
,
1490 _mesa_print_program(&p
.program
->Base
);
1497 * Return a fragment program which implements the current
1498 * fixed-function texture, fog and color-sum operations.
1500 struct gl_fragment_program
*
1501 _mesa_get_fixed_func_fragment_program(GLcontext
*ctx
)
1503 struct gl_fragment_program
*prog
;
1504 struct state_key key
;
1506 make_state_key(ctx
, &key
);
1508 prog
= (struct gl_fragment_program
*)
1509 _mesa_search_program_cache(ctx
->FragmentProgram
.Cache
,
1513 prog
= (struct gl_fragment_program
*)
1514 ctx
->Driver
.NewProgram(ctx
, GL_FRAGMENT_PROGRAM_ARB
, 0);
1516 create_new_program(ctx
, &key
, prog
);
1518 _mesa_program_cache_insert(ctx
, ctx
->FragmentProgram
.Cache
,
1519 &key
, sizeof(key
), &prog
->Base
);