summaryrefslogtreecommitdiffstats
path: root/src/compiler/glsl/glsl_parser_extras.h
blob: 3abeb9ff56373cfe49009e07e359e92d4762b0e9 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
/*
 * Copyright © 2010 Intel Corporation
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the next
 * paragraph) shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 */

#pragma once
#ifndef GLSL_PARSER_EXTRAS_H
#define GLSL_PARSER_EXTRAS_H

/*
 * Most of the definitions here only apply to C++
 */
#ifdef __cplusplus


#include <stdlib.h>
#include "glsl_symbol_table.h"

struct gl_context;

struct glsl_switch_state {
   /** Temporary variables needed for switch statement. */
   ir_variable *test_var;
   ir_variable *is_fallthru_var;
   class ast_switch_statement *switch_nesting_ast;

   /** Used to detect if 'continue' was called inside a switch. */
   ir_variable *continue_inside;

   /** Used to set condition if 'default' label should be chosen. */
   ir_variable *run_default;

   /** Table of constant values already used in case labels */
   struct hash_table *labels_ht;
   class ast_case_label *previous_default;

   bool is_switch_innermost; // if switch stmt is closest to break, ...
};

const char *
glsl_compute_version_string(void *mem_ctx, bool is_es, unsigned version);

typedef struct YYLTYPE {
   int first_line;
   int first_column;
   int last_line;
   int last_column;
   unsigned source;
} YYLTYPE;
# define YYLTYPE_IS_DECLARED 1
# define YYLTYPE_IS_TRIVIAL 1

extern void _mesa_glsl_error(YYLTYPE *locp, _mesa_glsl_parse_state *state,
                             const char *fmt, ...);


struct _mesa_glsl_parse_state {
   _mesa_glsl_parse_state(struct gl_context *_ctx, gl_shader_stage stage,
                          void *mem_ctx);

   DECLARE_RALLOC_CXX_OPERATORS(_mesa_glsl_parse_state);

   /**
    * Generate a string representing the GLSL version currently being compiled
    * (useful for error messages).
    */
   const char *get_version_string()
   {
      return glsl_compute_version_string(this, this->es_shader,
                                         this->language_version);
   }

   /**
    * Determine whether the current GLSL version is sufficiently high to
    * support a certain feature.
    *
    * \param required_glsl_version is the desktop GLSL version that is
    * required to support the feature, or 0 if no version of desktop GLSL
    * supports the feature.
    *
    * \param required_glsl_es_version is the GLSL ES version that is required
    * to support the feature, or 0 if no version of GLSL ES supports the
    * feature.
    */
   bool is_version(unsigned required_glsl_version,
                   unsigned required_glsl_es_version) const
   {
      unsigned required_version = this->es_shader ?
         required_glsl_es_version : required_glsl_version;
      unsigned this_version = this->forced_language_version
         ? this->forced_language_version : this->language_version;
      return required_version != 0
         && this_version >= required_version;
   }

   bool check_version(unsigned required_glsl_version,
                      unsigned required_glsl_es_version,
                      YYLTYPE *locp, const char *fmt, ...) PRINTFLIKE(5, 6);

   bool check_arrays_of_arrays_allowed(YYLTYPE *locp)
   {
      if (!(ARB_arrays_of_arrays_enable || is_version(430, 310))) {
         const char *const requirement = this->es_shader
            ? "GLSL ES 3.10"
            : "GL_ARB_arrays_of_arrays or GLSL 4.30";
         _mesa_glsl_error(locp, this,
                          "%s required for defining arrays of arrays.",
                          requirement);
         return false;
      }
      return true;
   }

   bool check_precision_qualifiers_allowed(YYLTYPE *locp)
   {
      return check_version(130, 100, locp,
                           "precision qualifiers are forbidden");
   }

   bool check_bitwise_operations_allowed(YYLTYPE *locp)
   {
      return check_version(130, 300, locp, "bit-wise operations are forbidden");
   }

   bool check_explicit_attrib_stream_allowed(YYLTYPE *locp)
   {
      if (!this->has_explicit_attrib_stream()) {
         const char *const requirement = "GL_ARB_gpu_shader5 extension or GLSL 4.00";

         _mesa_glsl_error(locp, this, "explicit stream requires %s",
                          requirement);
         return false;
      }

      return true;
   }

   bool check_explicit_attrib_location_allowed(YYLTYPE *locp,
                                               const ir_variable *var)
   {
      if (!this->has_explicit_attrib_location()) {
         const char *const requirement = this->es_shader
            ? "GLSL ES 3.00"
            : "GL_ARB_explicit_attrib_location extension or GLSL 3.30";

         _mesa_glsl_error(locp, this, "%s explicit location requires %s",
                          mode_string(var), requirement);
         return false;
      }

      return true;
   }

   bool check_separate_shader_objects_allowed(YYLTYPE *locp,
                                              const ir_variable *var)
   {
      if (!this->has_separate_shader_objects()) {
         const char *const requirement = this->es_shader
            ? "GL_EXT_separate_shader_objects extension or GLSL ES 3.10"
            : "GL_ARB_separate_shader_objects extension or GLSL 4.20";

         _mesa_glsl_error(locp, this, "%s explicit location requires %s",
                          mode_string(var), requirement);
         return false;
      }

      return true;
   }

   bool check_explicit_uniform_location_allowed(YYLTYPE *locp,
                                                const ir_variable *)
   {
      if (!this->has_explicit_attrib_location() ||
          !this->has_explicit_uniform_location()) {
         const char *const requirement = this->es_shader
            ? "GLSL ES 3.10"
            : "GL_ARB_explicit_uniform_location and either "
              "GL_ARB_explicit_attrib_location or GLSL 3.30.";

         _mesa_glsl_error(locp, this,
                          "uniform explicit location requires %s",
                          requirement);
         return false;
      }

      return true;
   }

   bool has_atomic_counters() const
   {
      return ARB_shader_atomic_counters_enable || is_version(420, 310);
   }

   bool has_enhanced_layouts() const
   {
      return ARB_enhanced_layouts_enable || is_version(440, 0);
   }

   bool has_explicit_attrib_stream() const
   {
      return ARB_gpu_shader5_enable || is_version(400, 0);
   }

   bool has_explicit_attrib_location() const
   {
      return ARB_explicit_attrib_location_enable || is_version(330, 300);
   }

   bool has_explicit_uniform_location() const
   {
      return ARB_explicit_uniform_location_enable || is_version(430, 310);
   }

   bool has_uniform_buffer_objects() const
   {
      return ARB_uniform_buffer_object_enable || is_version(140, 300);
   }

   bool has_shader_storage_buffer_objects() const
   {
      return ARB_shader_storage_buffer_object_enable || is_version(430, 310);
   }

   bool has_separate_shader_objects() const
   {
      return ARB_separate_shader_objects_enable || is_version(410, 310)
         || EXT_separate_shader_objects_enable;
   }

   bool has_double() const
   {
      return ARB_gpu_shader_fp64_enable || is_version(400, 0);
   }

   bool has_420pack() const
   {
      return ARB_shading_language_420pack_enable || is_version(420, 0);
   }

   bool has_420pack_or_es31() const
   {
      return ARB_shading_language_420pack_enable || is_version(420, 310);
   }

   bool has_compute_shader() const
   {
      return ARB_compute_shader_enable || is_version(430, 310);
   }

   bool has_shader_io_blocks() const
   {
      /* The OES_geometry_shader_specification says:
       *
       *    "If the OES_geometry_shader extension is enabled, the
       *     OES_shader_io_blocks extension is also implicitly enabled."
       *
       * The OES_tessellation_shader extension has similar wording.
       */
      return OES_shader_io_blocks_enable ||
             EXT_shader_io_blocks_enable ||
             OES_geometry_shader_enable ||
             EXT_geometry_shader_enable ||
             OES_tessellation_shader_enable ||
             EXT_tessellation_shader_enable ||

             is_version(150, 320);
   }

   bool has_geometry_shader() const
   {
      return OES_geometry_shader_enable || EXT_geometry_shader_enable ||
             is_version(150, 320);
   }

   bool has_tessellation_shader() const
   {
      return ARB_tessellation_shader_enable ||
             OES_tessellation_shader_enable ||
             EXT_tessellation_shader_enable ||
             is_version(400, 320);
   }

   bool has_clip_distance() const
   {
      return EXT_clip_cull_distance_enable || is_version(130, 0);
   }

   bool has_cull_distance() const
   {
      return EXT_clip_cull_distance_enable ||
             ARB_cull_distance_enable ||
             is_version(450, 0);
   }

   bool has_framebuffer_fetch() const
   {
      return EXT_shader_framebuffer_fetch_enable ||
             MESA_shader_framebuffer_fetch_enable ||
             MESA_shader_framebuffer_fetch_non_coherent_enable;
   }

   bool has_texture_cube_map_array() const
   {
      return ARB_texture_cube_map_array_enable ||
             EXT_texture_cube_map_array_enable ||
             OES_texture_cube_map_array_enable ||
             is_version(400, 320);
   }

   void process_version_directive(YYLTYPE *locp, int version,
                                  const char *ident);

   struct gl_context *const ctx;
   void *scanner;
   exec_list translation_unit;
   glsl_symbol_table *symbols;

   unsigned num_supported_versions;
   struct {
      unsigned ver;
      uint8_t gl_ver;
      bool es;
   } supported_versions[16];

   bool es_shader;
   unsigned language_version;
   unsigned forced_language_version;
   bool zero_init;
   unsigned gl_version;
   gl_shader_stage stage;

   /**
    * Default uniform layout qualifiers tracked during parsing.
    * Currently affects uniform blocks and uniform buffer variables in
    * those blocks.
    */
   struct ast_type_qualifier *default_uniform_qualifier;

   /**
    * Default shader storage layout qualifiers tracked during parsing.
    * Currently affects shader storage blocks and shader storage buffer
    * variables in those blocks.
    */
   struct ast_type_qualifier *default_shader_storage_qualifier;

   /**
    * Variables to track different cases if a fragment shader redeclares
    * built-in variable gl_FragCoord.
    *
    * Note: These values are computed at ast_to_hir time rather than at parse
    * time.
    */
   bool fs_redeclares_gl_fragcoord;
   bool fs_origin_upper_left;
   bool fs_pixel_center_integer;
   bool fs_redeclares_gl_fragcoord_with_no_layout_qualifiers;

   /**
    * True if a geometry shader input primitive type or tessellation control
    * output vertices were specified using a layout directive.
    *
    * Note: these values are computed at ast_to_hir time rather than at parse
    * time.
    */
   bool gs_input_prim_type_specified;
   bool tcs_output_vertices_specified;

   /**
    * Input layout qualifiers from GLSL 1.50 (geometry shader controls),
    * and GLSL 4.00 (tessellation evaluation shader)
    */
   struct ast_type_qualifier *in_qualifier;

   /**
    * True if a compute shader input local size was specified using a layout
    * directive.
    *
    * Note: this value is computed at ast_to_hir time rather than at parse
    * time.
    */
   bool cs_input_local_size_specified;

   /**
    * If cs_input_local_size_specified is true, the local size that was
    * specified.  Otherwise ignored.
    */
   unsigned cs_input_local_size[3];

   /**
    * Output layout qualifiers from GLSL 1.50 (geometry shader controls),
    * and GLSL 4.00 (tessellation control shader).
    */
   struct ast_type_qualifier *out_qualifier;

   /**
    * Printable list of GLSL versions supported by the current context
    *
    * \note
    * This string should probably be generated per-context instead of per
    * invokation of the compiler.  This should be changed when the method of
    * tracking supported GLSL versions changes.
    */
   const char *supported_version_string;

   /**
    * Implementation defined limits that affect built-in variables, etc.
    *
    * \sa struct gl_constants (in mtypes.h)
    */
   struct {
      /* 1.10 */
      unsigned MaxLights;
      unsigned MaxClipPlanes;
      unsigned MaxTextureUnits;
      unsigned MaxTextureCoords;
      unsigned MaxVertexAttribs;
      unsigned MaxVertexUniformComponents;
      unsigned MaxVertexTextureImageUnits;
      unsigned MaxCombinedTextureImageUnits;
      unsigned MaxTextureImageUnits;
      unsigned MaxFragmentUniformComponents;

      /* ARB_draw_buffers */
      unsigned MaxDrawBuffers;

      /* ARB_enhanced_layouts */
      unsigned MaxTransformFeedbackBuffers;
      unsigned MaxTransformFeedbackInterleavedComponents;

      /* ARB_blend_func_extended */
      unsigned MaxDualSourceDrawBuffers;

      /* 3.00 ES */
      int MinProgramTexelOffset;
      int MaxProgramTexelOffset;

      /* 1.50 */
      unsigned MaxVertexOutputComponents;
      unsigned MaxGeometryInputComponents;
      unsigned MaxGeometryOutputComponents;
      unsigned MaxFragmentInputComponents;
      unsigned MaxGeometryTextureImageUnits;
      unsigned MaxGeometryOutputVertices;
      unsigned MaxGeometryTotalOutputComponents;
      unsigned MaxGeometryUniformComponents;

      /* ARB_shader_atomic_counters */
      unsigned MaxVertexAtomicCounters;
      unsigned MaxTessControlAtomicCounters;
      unsigned MaxTessEvaluationAtomicCounters;
      unsigned MaxGeometryAtomicCounters;
      unsigned MaxFragmentAtomicCounters;
      unsigned MaxCombinedAtomicCounters;
      unsigned MaxAtomicBufferBindings;

      /* These are also atomic counter related, but they weren't added to
       * until atomic counters were added to core in GLSL 4.20 and GLSL ES
       * 3.10.
       */
      unsigned MaxVertexAtomicCounterBuffers;
      unsigned MaxTessControlAtomicCounterBuffers;
      unsigned MaxTessEvaluationAtomicCounterBuffers;
      unsigned MaxGeometryAtomicCounterBuffers;
      unsigned MaxFragmentAtomicCounterBuffers;
      unsigned MaxCombinedAtomicCounterBuffers;
      unsigned MaxAtomicCounterBufferSize;

      /* ARB_compute_shader */
      unsigned MaxComputeAtomicCounterBuffers;
      unsigned MaxComputeAtomicCounters;
      unsigned MaxComputeImageUniforms;
      unsigned MaxComputeTextureImageUnits;
      unsigned MaxComputeUniformComponents;
      unsigned MaxComputeWorkGroupCount[3];
      unsigned MaxComputeWorkGroupSize[3];

      /* ARB_shader_image_load_store */
      unsigned MaxImageUnits;
      unsigned MaxCombinedShaderOutputResources;
      unsigned MaxImageSamples;
      unsigned MaxVertexImageUniforms;
      unsigned MaxTessControlImageUniforms;
      unsigned MaxTessEvaluationImageUniforms;
      unsigned MaxGeometryImageUniforms;
      unsigned MaxFragmentImageUniforms;
      unsigned MaxCombinedImageUniforms;

      /* ARB_viewport_array */
      unsigned MaxViewports;

      /* ARB_tessellation_shader */
      unsigned MaxPatchVertices;
      unsigned MaxTessGenLevel;
      unsigned MaxTessControlInputComponents;
      unsigned MaxTessControlOutputComponents;
      unsigned MaxTessControlTextureImageUnits;
      unsigned MaxTessEvaluationInputComponents;
      unsigned MaxTessEvaluationOutputComponents;
      unsigned MaxTessEvaluationTextureImageUnits;
      unsigned MaxTessPatchComponents;
      unsigned MaxTessControlTotalOutputComponents;
      unsigned MaxTessControlUniformComponents;
      unsigned MaxTessEvaluationUniformComponents;

      /* GL 4.5 / OES_sample_variables */
      unsigned MaxSamples;
   } Const;

   /**
    * During AST to IR conversion, pointer to current IR function
    *
    * Will be \c NULL whenever the AST to IR conversion is not inside a
    * function definition.
    */
   class ir_function_signature *current_function;

   /**
    * During AST to IR conversion, pointer to the toplevel IR
    * instruction list being generated.
    */
   exec_list *toplevel_ir;

   /** Have we found a return statement in this function? */
   bool found_return;

   /** Was there an error during compilation? */
   bool error;

   /**
    * Are all shader inputs / outputs invariant?
    *
    * This is set when the 'STDGL invariant(all)' pragma is used.
    */
   bool all_invariant;

   /** Loop or switch statement containing the current instructions. */
   class ast_iteration_statement *loop_nesting_ast;

   struct glsl_switch_state switch_state;

   /** List of structures defined in user code. */
   const glsl_type **user_structures;
   unsigned num_user_structures;

   char *info_log;

   /**
    * \name Enable bits for GLSL extensions
    */
   /*@{*/
   /* ARB extensions go here, sorted alphabetically.
    */
   bool ARB_ES3_1_compatibility_enable;
   bool ARB_ES3_1_compatibility_warn;
   bool ARB_ES3_2_compatibility_enable;
   bool ARB_ES3_2_compatibility_warn;
   bool ARB_arrays_of_arrays_enable;
   bool ARB_arrays_of_arrays_warn;
   bool ARB_compute_shader_enable;
   bool ARB_compute_shader_warn;
   bool ARB_compute_variable_group_size_enable;
   bool ARB_compute_variable_group_size_warn;
   bool ARB_conservative_depth_enable;
   bool ARB_conservative_depth_warn;
   bool ARB_cull_distance_enable;
   bool ARB_cull_distance_warn;
   bool ARB_derivative_control_enable;
   bool ARB_derivative_control_warn;
   bool ARB_draw_buffers_enable;
   bool ARB_draw_buffers_warn;
   bool ARB_draw_instanced_enable;
   bool ARB_draw_instanced_warn;
   bool ARB_enhanced_layouts_enable;
   bool ARB_enhanced_layouts_warn;
   bool ARB_explicit_attrib_location_enable;
   bool ARB_explicit_attrib_location_warn;
   bool ARB_explicit_uniform_location_enable;
   bool ARB_explicit_uniform_location_warn;
   bool ARB_fragment_coord_conventions_enable;
   bool ARB_fragment_coord_conventions_warn;
   bool ARB_fragment_layer_viewport_enable;
   bool ARB_fragment_layer_viewport_warn;
   bool ARB_gpu_shader5_enable;
   bool ARB_gpu_shader5_warn;
   bool ARB_gpu_shader_fp64_enable;
   bool ARB_gpu_shader_fp64_warn;
   bool ARB_sample_shading_enable;
   bool ARB_sample_shading_warn;
   bool ARB_separate_shader_objects_enable;
   bool ARB_separate_shader_objects_warn;
   bool ARB_shader_atomic_counter_ops_enable;
   bool ARB_shader_atomic_counter_ops_warn;
   bool ARB_shader_atomic_counters_enable;
   bool ARB_shader_atomic_counters_warn;
   bool ARB_shader_bit_encoding_enable;
   bool ARB_shader_bit_encoding_warn;
   bool ARB_shader_clock_enable;
   bool ARB_shader_clock_warn;
   bool ARB_shader_draw_parameters_enable;
   bool ARB_shader_draw_parameters_warn;
   bool ARB_shader_group_vote_enable;
   bool ARB_shader_group_vote_warn;
   bool ARB_shader_image_load_store_enable;
   bool ARB_shader_image_load_store_warn;
   bool ARB_shader_image_size_enable;
   bool ARB_shader_image_size_warn;
   bool ARB_shader_precision_enable;
   bool ARB_shader_precision_warn;
   bool ARB_shader_stencil_export_enable;
   bool ARB_shader_stencil_export_warn;
   bool ARB_shader_storage_buffer_object_enable;
   bool ARB_shader_storage_buffer_object_warn;
   bool ARB_shader_subroutine_enable;
   bool ARB_shader_subroutine_warn;
   bool ARB_shader_texture_image_samples_enable;
   bool ARB_shader_texture_image_samples_warn;
   bool ARB_shader_texture_lod_enable;
   bool ARB_shader_texture_lod_warn;
   bool ARB_shader_viewport_layer_array_enable;
   bool ARB_shader_viewport_layer_array_warn;
   bool ARB_shading_language_420pack_enable;
   bool ARB_shading_language_420pack_warn;
   bool ARB_shading_language_packing_enable;
   bool ARB_shading_language_packing_warn;
   bool ARB_tessellation_shader_enable;
   bool ARB_tessellation_shader_warn;
   bool ARB_texture_cube_map_array_enable;
   bool ARB_texture_cube_map_array_warn;
   bool ARB_texture_gather_enable;
   bool ARB_texture_gather_warn;
   bool ARB_texture_multisample_enable;
   bool ARB_texture_multisample_warn;
   bool ARB_texture_query_levels_enable;
   bool ARB_texture_query_levels_warn;
   bool ARB_texture_query_lod_enable;
   bool ARB_texture_query_lod_warn;
   bool ARB_texture_rectangle_enable;
   bool ARB_texture_rectangle_warn;
   bool ARB_uniform_buffer_object_enable;
   bool ARB_uniform_buffer_object_warn;
   bool ARB_vertex_attrib_64bit_enable;
   bool ARB_vertex_attrib_64bit_warn;
   bool ARB_viewport_array_enable;
   bool ARB_viewport_array_warn;

   /* KHR extensions go here, sorted alphabetically.
    */
   bool KHR_blend_equation_advanced_enable;
   bool KHR_blend_equation_advanced_warn;

   /* OES extensions go here, sorted alphabetically.
    */
   bool OES_EGL_image_external_enable;
   bool OES_EGL_image_external_warn;
   bool OES_geometry_point_size_enable;
   bool OES_geometry_point_size_warn;
   bool OES_geometry_shader_enable;
   bool OES_geometry_shader_warn;
   bool OES_gpu_shader5_enable;
   bool OES_gpu_shader5_warn;
   bool OES_primitive_bounding_box_enable;
   bool OES_primitive_bounding_box_warn;
   bool OES_sample_variables_enable;
   bool OES_sample_variables_warn;
   bool OES_shader_image_atomic_enable;
   bool OES_shader_image_atomic_warn;
   bool OES_shader_io_blocks_enable;
   bool OES_shader_io_blocks_warn;
   bool OES_shader_multisample_interpolation_enable;
   bool OES_shader_multisample_interpolation_warn;
   bool OES_standard_derivatives_enable;
   bool OES_standard_derivatives_warn;
   bool OES_tessellation_point_size_enable;
   bool OES_tessellation_point_size_warn;
   bool OES_tessellation_shader_enable;
   bool OES_tessellation_shader_warn;
   bool OES_texture_3D_enable;
   bool OES_texture_3D_warn;
   bool OES_texture_buffer_enable;
   bool OES_texture_buffer_warn;
   bool OES_texture_cube_map_array_enable;
   bool OES_texture_cube_map_array_warn;
   bool OES_texture_storage_multisample_2d_array_enable;
   bool OES_texture_storage_multisample_2d_array_warn;
   bool OES_viewport_array_enable;
   bool OES_viewport_array_warn;

   /* All other extensions go here, sorted alphabetically.
    */
   bool AMD_conservative_depth_enable;
   bool AMD_conservative_depth_warn;
   bool AMD_shader_stencil_export_enable;
   bool AMD_shader_stencil_export_warn;
   bool AMD_shader_trinary_minmax_enable;
   bool AMD_shader_trinary_minmax_warn;
   bool AMD_vertex_shader_layer_enable;
   bool AMD_vertex_shader_layer_warn;
   bool AMD_vertex_shader_viewport_index_enable;
   bool AMD_vertex_shader_viewport_index_warn;
   bool ANDROID_extension_pack_es31a_enable;
   bool ANDROID_extension_pack_es31a_warn;
   bool EXT_blend_func_extended_enable;
   bool EXT_blend_func_extended_warn;
   bool EXT_clip_cull_distance_enable;
   bool EXT_clip_cull_distance_warn;
   bool EXT_draw_buffers_enable;
   bool EXT_draw_buffers_warn;
   bool EXT_geometry_point_size_enable;
   bool EXT_geometry_point_size_warn;
   bool EXT_geometry_shader_enable;
   bool EXT_geometry_shader_warn;
   bool EXT_gpu_shader5_enable;
   bool EXT_gpu_shader5_warn;
   bool EXT_primitive_bounding_box_enable;
   bool EXT_primitive_bounding_box_warn;
   bool EXT_separate_shader_objects_enable;
   bool EXT_separate_shader_objects_warn;
   bool EXT_shader_framebuffer_fetch_enable;
   bool EXT_shader_framebuffer_fetch_warn;
   bool EXT_shader_integer_mix_enable;
   bool EXT_shader_integer_mix_warn;
   bool EXT_shader_io_blocks_enable;
   bool EXT_shader_io_blocks_warn;
   bool EXT_shader_samples_identical_enable;
   bool EXT_shader_samples_identical_warn;
   bool EXT_tessellation_point_size_enable;
   bool EXT_tessellation_point_size_warn;
   bool EXT_tessellation_shader_enable;
   bool EXT_tessellation_shader_warn;
   bool EXT_texture_array_enable;
   bool EXT_texture_array_warn;
   bool EXT_texture_buffer_enable;
   bool EXT_texture_buffer_warn;
   bool EXT_texture_cube_map_array_enable;
   bool EXT_texture_cube_map_array_warn;
   bool MESA_shader_framebuffer_fetch_enable;
   bool MESA_shader_framebuffer_fetch_warn;
   bool MESA_shader_framebuffer_fetch_non_coherent_enable;
   bool MESA_shader_framebuffer_fetch_non_coherent_warn;
   bool MESA_shader_integer_functions_enable;
   bool MESA_shader_integer_functions_warn;
   /*@}*/

   /** Extensions supported by the OpenGL implementation. */
   const struct gl_extensions *extensions;

   bool uses_builtin_functions;
   bool fs_uses_gl_fragcoord;

   /**
    * For geometry shaders, size of the most recently seen input declaration
    * that was a sized array, or 0 if no sized input array declarations have
    * been seen.
    *
    * Unused for other shader types.
    */
   unsigned gs_input_size;

   bool fs_early_fragment_tests;

   unsigned fs_blend_support;

   /**
    * For tessellation control shaders, size of the most recently seen output
    * declaration that was a sized array, or 0 if no sized output array
    * declarations have been seen.
    *
    * Unused for other shader types.
    */
   unsigned tcs_output_size;

   /** Atomic counter offsets by binding */
   unsigned atomic_counter_offsets[MAX_COMBINED_ATOMIC_BUFFERS];

   bool allow_extension_directive_midshader;

   /**
    * Known subroutine type declarations.
    */
   int num_subroutine_types;
   ir_function **subroutine_types;

   /**
    * Functions that are associated with
    * subroutine types.
    */
   int num_subroutines;
   ir_function **subroutines;

   /**
    * field selection temporary parser storage -
    * did the parser just parse a dot.
    */
   bool is_field;

   /**
    * seen values for clip/cull distance sizes
    * so we can check totals aren't too large.
    */
   unsigned clip_dist_size, cull_dist_size;
};

# define YYLLOC_DEFAULT(Current, Rhs, N)                        \
do {                                                            \
   if (N)                                                       \
   {                                                            \
      (Current).first_line   = YYRHSLOC(Rhs, 1).first_line;     \
      (Current).first_column = YYRHSLOC(Rhs, 1).first_column;   \
      (Current).last_line    = YYRHSLOC(Rhs, N).last_line;      \
      (Current).last_column  = YYRHSLOC(Rhs, N).last_column;    \
   }                                                            \
   else                                                         \
   {                                                            \
      (Current).first_line   = (Current).last_line =            \
         YYRHSLOC(Rhs, 0).last_line;                            \
      (Current).first_column = (Current).last_column =          \
         YYRHSLOC(Rhs, 0).last_column;                          \
   }                                                            \
   (Current).source = 0;                                        \
} while (0)

/**
 * Emit a warning to the shader log
 *
 * \sa _mesa_glsl_error
 */
extern void _mesa_glsl_warning(const YYLTYPE *locp,
                               _mesa_glsl_parse_state *state,
                               const char *fmt, ...);

extern void _mesa_glsl_lexer_ctor(struct _mesa_glsl_parse_state *state,
                                  const char *string);

extern void _mesa_glsl_lexer_dtor(struct _mesa_glsl_parse_state *state);

union YYSTYPE;
extern int _mesa_glsl_lexer_lex(union YYSTYPE *yylval, YYLTYPE *yylloc,
                                void *scanner);

extern int _mesa_glsl_parse(struct _mesa_glsl_parse_state *);

/**
 * Process elements of the #extension directive
 *
 * \return
 * If \c name and \c behavior are valid, \c true is returned.  Otherwise
 * \c false is returned.
 */
extern bool _mesa_glsl_process_extension(const char *name, YYLTYPE *name_locp,
                                         const char *behavior,
                                         YYLTYPE *behavior_locp,
                                         _mesa_glsl_parse_state *state);

#endif /* __cplusplus */


/*
 * These definitions apply to C and C++
 */
#ifdef __cplusplus
extern "C" {
#endif

struct glcpp_parser;

typedef void (*glcpp_extension_iterator)(
              struct _mesa_glsl_parse_state *state,
              void (*add_builtin_define)(struct glcpp_parser *, const char *, int),
              struct glcpp_parser *data,
              unsigned version,
              bool es);

extern int glcpp_preprocess(void *ctx, const char **shader, char **info_log,
                            glcpp_extension_iterator extensions,
                            struct _mesa_glsl_parse_state *state,
                            struct gl_context *gl_ctx);

extern void _mesa_destroy_shader_compiler(void);
extern void _mesa_destroy_shader_compiler_caches(void);

#ifdef __cplusplus
}
#endif


#endif /* GLSL_PARSER_EXTRAS_H */