src/compiler/glsl/glsl_parser_extras.h

   1 /*
   2  * Copyright © 2010 Intel Corporation
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  21  * DEALINGS IN THE SOFTWARE.
  22  */
  23
  24 #ifndef GLSL_PARSER_EXTRAS_H
  25 #define GLSL_PARSER_EXTRAS_H
  26
  27 /*
  28  * Most of the definitions here only apply to C++
  29  */
  30 #ifdef __cplusplus
  31
  32
  33 #include <stdlib.h>
  34 #include "glsl_symbol_table.h"
  35
  36 /* THIS is a macro defined somewhere deep in the Windows MSVC header files.
  37  * Undefine it here to avoid collision with the lexer's THIS token.
  38  */
  39 #undef THIS
  40
  41 struct gl_context;
  42
  43 struct glsl_switch_state {
  44    /** Temporary variables needed for switch statement. */
  45    ir_variable *test_var;
  46    ir_variable *is_fallthru_var;
  47    class ast_switch_statement *switch_nesting_ast;
  48
  49    /** Used to detect if 'continue' was called inside a switch. */
  50    ir_variable *continue_inside;
  51
  52    /** Used to set condition if 'default' label should be chosen. */
  53    ir_variable *run_default;
  54
  55    /** Table of constant values already used in case labels */
  56    struct hash_table *labels_ht;
  57    class ast_case_label *previous_default;
  58
  59    bool is_switch_innermost; // if switch stmt is closest to break, ...
  60 };
  61
  62 const char *
  63 glsl_compute_version_string(void *mem_ctx, bool is_es, unsigned version);
  64
  65 typedef struct YYLTYPE {
  66    int first_line;
  67    int first_column;
  68    int last_line;
  69    int last_column;
  70    unsigned source;
  71 } YYLTYPE;
  72 # define YYLTYPE_IS_DECLARED 1
  73 # define YYLTYPE_IS_TRIVIAL 1
  74
  75 extern void _mesa_glsl_error(YYLTYPE *locp, _mesa_glsl_parse_state *state,
  76                              const char *fmt, ...);
  77
  78
  79 struct _mesa_glsl_parse_state {
  80    _mesa_glsl_parse_state(struct gl_context *_ctx, gl_shader_stage stage,
  81                           void *mem_ctx);
  82
  83    DECLARE_RZALLOC_CXX_OPERATORS(_mesa_glsl_parse_state);
  84
  85    /**
  86     * Generate a string representing the GLSL version currently being compiled
  87     * (useful for error messages).
  88     */
  89    const char *get_version_string()
  90    {
  91       return glsl_compute_version_string(this, this->es_shader,
  92                                          this->language_version);
  93    }
  94
  95    /**
  96     * Determine whether the current GLSL version is sufficiently high to
  97     * support a certain feature.
  98     *
  99     * \param required_glsl_version is the desktop GLSL version that is
 100     * required to support the feature, or 0 if no version of desktop GLSL
 101     * supports the feature.
 102     *
 103     * \param required_glsl_es_version is the GLSL ES version that is required
 104     * to support the feature, or 0 if no version of GLSL ES supports the
 105     * feature.
 106     */
 107    bool is_version(unsigned required_glsl_version,
 108                    unsigned required_glsl_es_version) const
 109    {
 110       unsigned required_version = this->es_shader ?
 111          required_glsl_es_version : required_glsl_version;
 112       unsigned this_version = this->forced_language_version
 113          ? this->forced_language_version : this->language_version;
 114       return required_version != 0
 115          && this_version >= required_version;
 116    }
 117
 118    bool check_version(unsigned required_glsl_version,
 119                       unsigned required_glsl_es_version,
 120                       YYLTYPE *locp, const char *fmt, ...) PRINTFLIKE(5, 6);
 121
 122    bool check_arrays_of_arrays_allowed(YYLTYPE *locp)
 123    {
 124       if (!(ARB_arrays_of_arrays_enable || is_version(430, 310))) {
 125          const char *const requirement = this->es_shader
 126             ? "GLSL ES 3.10"
 127             : "GL_ARB_arrays_of_arrays or GLSL 4.30";
 128          _mesa_glsl_error(locp, this,
 129                           "%s required for defining arrays of arrays.",
 130                           requirement);
 131          return false;
 132       }
 133       return true;
 134    }
 135
 136    bool check_precision_qualifiers_allowed(YYLTYPE *locp)
 137    {
 138       return check_version(130, 100, locp,
 139                            "precision qualifiers are forbidden");
 140    }
 141
 142    bool check_bitwise_operations_allowed(YYLTYPE *locp)
 143    {
 144       return check_version(130, 300, locp, "bit-wise operations are forbidden");
 145    }
 146
 147    bool check_explicit_attrib_stream_allowed(YYLTYPE *locp)
 148    {
 149       if (!this->has_explicit_attrib_stream()) {
 150          const char *const requirement = "GL_ARB_gpu_shader5 extension or GLSL 4.00";
 151
 152          _mesa_glsl_error(locp, this, "explicit stream requires %s",
 153                           requirement);
 154          return false;
 155       }
 156
 157       return true;
 158    }
 159
 160    bool check_explicit_attrib_location_allowed(YYLTYPE *locp,
 161                                                const ir_variable *var)
 162    {
 163       if (!this->has_explicit_attrib_location()) {
 164          const char *const requirement = this->es_shader
 165             ? "GLSL ES 3.00"
 166             : "GL_ARB_explicit_attrib_location extension or GLSL 3.30";
 167
 168          _mesa_glsl_error(locp, this, "%s explicit location requires %s",
 169                           mode_string(var), requirement);
 170          return false;
 171       }
 172
 173       return true;
 174    }
 175
 176    bool check_separate_shader_objects_allowed(YYLTYPE *locp,
 177                                               const ir_variable *var)
 178    {
 179       if (!this->has_separate_shader_objects()) {
 180          const char *const requirement = this->es_shader
 181             ? "GL_EXT_separate_shader_objects extension or GLSL ES 3.10"
 182             : "GL_ARB_separate_shader_objects extension or GLSL 4.20";
 183
 184          _mesa_glsl_error(locp, this, "%s explicit location requires %s",
 185                           mode_string(var), requirement);
 186          return false;
 187       }
 188
 189       return true;
 190    }
 191
 192    bool check_explicit_uniform_location_allowed(YYLTYPE *locp,
 193                                                 const ir_variable *)
 194    {
 195       if (!this->has_explicit_attrib_location() ||
 196           !this->has_explicit_uniform_location()) {
 197          const char *const requirement = this->es_shader
 198             ? "GLSL ES 3.10"
 199             : "GL_ARB_explicit_uniform_location and either "
 200               "GL_ARB_explicit_attrib_location or GLSL 3.30.";
 201
 202          _mesa_glsl_error(locp, this,
 203                           "uniform explicit location requires %s",
 204                           requirement);
 205          return false;
 206       }
 207
 208       return true;
 209    }
 210
 211    bool has_atomic_counters() const
 212    {
 213       return ARB_shader_atomic_counters_enable || is_version(420, 310);
 214    }
 215
 216    bool has_enhanced_layouts() const
 217    {
 218       return ARB_enhanced_layouts_enable || is_version(440, 0);
 219    }
 220
 221    bool has_explicit_attrib_stream() const
 222    {
 223       return ARB_gpu_shader5_enable || is_version(400, 0);
 224    }
 225
 226    bool has_explicit_attrib_location() const
 227    {
 228       return ARB_explicit_attrib_location_enable || is_version(330, 300);
 229    }
 230
 231    bool has_explicit_uniform_location() const
 232    {
 233       return ARB_explicit_uniform_location_enable || is_version(430, 310);
 234    }
 235
 236    bool has_uniform_buffer_objects() const
 237    {
 238       return ARB_uniform_buffer_object_enable || is_version(140, 300);
 239    }
 240
 241    bool has_shader_storage_buffer_objects() const
 242    {
 243       return ARB_shader_storage_buffer_object_enable || is_version(430, 310);
 244    }
 245
 246    bool has_separate_shader_objects() const
 247    {
 248       return ARB_separate_shader_objects_enable || is_version(410, 310)
 249          || EXT_separate_shader_objects_enable;
 250    }
 251
 252    bool has_double() const
 253    {
 254       return ARB_gpu_shader_fp64_enable || is_version(400, 0);
 255    }
 256
 257    bool has_int64() const
 258    {
 259       return ARB_gpu_shader_int64_enable ||
 260              AMD_gpu_shader_int64_enable;
 261    }
 262
 263    bool has_420pack() const
 264    {
 265       return ARB_shading_language_420pack_enable || is_version(420, 0);
 266    }
 267
 268    bool has_420pack_or_es31() const
 269    {
 270       return ARB_shading_language_420pack_enable || is_version(420, 310);
 271    }
 272
 273    bool has_compute_shader() const
 274    {
 275       return ARB_compute_shader_enable || is_version(430, 310);
 276    }
 277
 278    bool has_shader_io_blocks() const
 279    {
 280       /* The OES_geometry_shader_specification says:
 281        *
 282        *    "If the OES_geometry_shader extension is enabled, the
 283        *     OES_shader_io_blocks extension is also implicitly enabled."
 284        *
 285        * The OES_tessellation_shader extension has similar wording.
 286        */
 287       return OES_shader_io_blocks_enable ||
 288              EXT_shader_io_blocks_enable ||
 289              OES_geometry_shader_enable ||
 290              EXT_geometry_shader_enable ||
 291              OES_tessellation_shader_enable ||
 292              EXT_tessellation_shader_enable ||
 293
 294              is_version(150, 320);
 295    }
 296
 297    bool has_geometry_shader() const
 298    {
 299       return OES_geometry_shader_enable || EXT_geometry_shader_enable ||
 300              is_version(150, 320);
 301    }
 302
 303    bool has_tessellation_shader() const
 304    {
 305       return ARB_tessellation_shader_enable ||
 306              OES_tessellation_shader_enable ||
 307              EXT_tessellation_shader_enable ||
 308              is_version(400, 320);
 309    }
 310
 311    bool has_clip_distance() const
 312    {
 313       return EXT_clip_cull_distance_enable || is_version(130, 0);
 314    }
 315
 316    bool has_cull_distance() const
 317    {
 318       return EXT_clip_cull_distance_enable ||
 319              ARB_cull_distance_enable ||
 320              is_version(450, 0);
 321    }
 322
 323    bool has_framebuffer_fetch() const
 324    {
 325       return EXT_shader_framebuffer_fetch_enable ||
 326              EXT_shader_framebuffer_fetch_non_coherent_enable;
 327    }
 328
 329    bool has_texture_cube_map_array() const
 330    {
 331       return ARB_texture_cube_map_array_enable ||
 332              EXT_texture_cube_map_array_enable ||
 333              OES_texture_cube_map_array_enable ||
 334              is_version(400, 320);
 335    }
 336
 337    bool has_shader_image_load_store() const
 338    {
 339       return ARB_shader_image_load_store_enable || is_version(420, 310);
 340    }
 341
 342    bool has_bindless() const
 343    {
 344       return ARB_bindless_texture_enable;
 345    }
 346
 347    void process_version_directive(YYLTYPE *locp, int version,
 348                                   const char *ident);
 349
 350    struct gl_context *const ctx;
 351    void *scanner;
 352    exec_list translation_unit;
 353    glsl_symbol_table *symbols;
 354
 355    void *linalloc;
 356
 357    unsigned num_supported_versions;
 358    struct {
 359       unsigned ver;
 360       uint8_t gl_ver;
 361       bool es;
 362    } supported_versions[17];
 363
 364    bool es_shader;
 365    bool compat_shader;
 366    unsigned language_version;
 367    unsigned forced_language_version;
 368    bool zero_init;
 369    unsigned gl_version;
 370    gl_shader_stage stage;
 371
 372    /**
 373     * Default uniform layout qualifiers tracked during parsing.
 374     * Currently affects uniform blocks and uniform buffer variables in
 375     * those blocks.
 376     */
 377    struct ast_type_qualifier *default_uniform_qualifier;
 378
 379    /**
 380     * Default shader storage layout qualifiers tracked during parsing.
 381     * Currently affects shader storage blocks and shader storage buffer
 382     * variables in those blocks.
 383     */
 384    struct ast_type_qualifier *default_shader_storage_qualifier;
 385
 386    /**
 387     * Variables to track different cases if a fragment shader redeclares
 388     * built-in variable gl_FragCoord.
 389     *
 390     * Note: These values are computed at ast_to_hir time rather than at parse
 391     * time.
 392     */
 393    bool fs_redeclares_gl_fragcoord;
 394    bool fs_origin_upper_left;
 395    bool fs_pixel_center_integer;
 396    bool fs_redeclares_gl_fragcoord_with_no_layout_qualifiers;
 397
 398    /**
 399     * True if a geometry shader input primitive type or tessellation control
 400     * output vertices were specified using a layout directive.
 401     *
 402     * Note: these values are computed at ast_to_hir time rather than at parse
 403     * time.
 404     */
 405    bool gs_input_prim_type_specified;
 406    bool tcs_output_vertices_specified;
 407
 408    /**
 409     * Input layout qualifiers from GLSL 1.50 (geometry shader controls),
 410     * and GLSL 4.00 (tessellation evaluation shader)
 411     */
 412    struct ast_type_qualifier *in_qualifier;
 413
 414    /**
 415     * True if a compute shader input local size was specified using a layout
 416     * directive.
 417     *
 418     * Note: this value is computed at ast_to_hir time rather than at parse
 419     * time.
 420     */
 421    bool cs_input_local_size_specified;
 422
 423    /**
 424     * If cs_input_local_size_specified is true, the local size that was
 425     * specified.  Otherwise ignored.
 426     */
 427    unsigned cs_input_local_size[3];
 428
 429    /**
 430     * True if a compute shader input local variable size was specified using
 431     * a layout directive as specified by ARB_compute_variable_group_size.
 432     */
 433    bool cs_input_local_size_variable_specified;
 434
 435    /**
 436     * True if a shader declare bindless_sampler/bindless_image, and
 437     * respectively bound_sampler/bound_image at global scope as specified by
 438     * ARB_bindless_texture.
 439     */
 440    bool bindless_sampler_specified;
 441    bool bindless_image_specified;
 442    bool bound_sampler_specified;
 443    bool bound_image_specified;
 444
 445    /**
 446     * Output layout qualifiers from GLSL 1.50 (geometry shader controls),
 447     * and GLSL 4.00 (tessellation control shader).
 448     */
 449    struct ast_type_qualifier *out_qualifier;
 450
 451    /**
 452     * Printable list of GLSL versions supported by the current context
 453     *
 454     * \note
 455     * This string should probably be generated per-context instead of per
 456     * invokation of the compiler.  This should be changed when the method of
 457     * tracking supported GLSL versions changes.
 458     */
 459    const char *supported_version_string;
 460
 461    /**
 462     * Implementation defined limits that affect built-in variables, etc.
 463     *
 464     * \sa struct gl_constants (in mtypes.h)
 465     */
 466    struct {
 467       /* 1.10 */
 468       unsigned MaxLights;
 469       unsigned MaxClipPlanes;
 470       unsigned MaxTextureUnits;
 471       unsigned MaxTextureCoords;
 472       unsigned MaxVertexAttribs;
 473       unsigned MaxVertexUniformComponents;
 474       unsigned MaxVertexTextureImageUnits;
 475       unsigned MaxCombinedTextureImageUnits;
 476       unsigned MaxTextureImageUnits;
 477       unsigned MaxFragmentUniformComponents;
 478
 479       /* ARB_draw_buffers */
 480       unsigned MaxDrawBuffers;
 481
 482       /* ARB_enhanced_layouts */
 483       unsigned MaxTransformFeedbackBuffers;
 484       unsigned MaxTransformFeedbackInterleavedComponents;
 485
 486       /* ARB_blend_func_extended */
 487       unsigned MaxDualSourceDrawBuffers;
 488
 489       /* 3.00 ES */
 490       int MinProgramTexelOffset;
 491       int MaxProgramTexelOffset;
 492
 493       /* 1.50 */
 494       unsigned MaxVertexOutputComponents;
 495       unsigned MaxGeometryInputComponents;
 496       unsigned MaxGeometryOutputComponents;
 497       unsigned MaxGeometryShaderInvocations;
 498       unsigned MaxFragmentInputComponents;
 499       unsigned MaxGeometryTextureImageUnits;
 500       unsigned MaxGeometryOutputVertices;
 501       unsigned MaxGeometryTotalOutputComponents;
 502       unsigned MaxGeometryUniformComponents;
 503
 504       /* ARB_shader_atomic_counters */
 505       unsigned MaxVertexAtomicCounters;
 506       unsigned MaxTessControlAtomicCounters;
 507       unsigned MaxTessEvaluationAtomicCounters;
 508       unsigned MaxGeometryAtomicCounters;
 509       unsigned MaxFragmentAtomicCounters;
 510       unsigned MaxCombinedAtomicCounters;
 511       unsigned MaxAtomicBufferBindings;
 512
 513       /* These are also atomic counter related, but they weren't added to
 514        * until atomic counters were added to core in GLSL 4.20 and GLSL ES
 515        * 3.10.
 516        */
 517       unsigned MaxVertexAtomicCounterBuffers;
 518       unsigned MaxTessControlAtomicCounterBuffers;
 519       unsigned MaxTessEvaluationAtomicCounterBuffers;
 520       unsigned MaxGeometryAtomicCounterBuffers;
 521       unsigned MaxFragmentAtomicCounterBuffers;
 522       unsigned MaxCombinedAtomicCounterBuffers;
 523       unsigned MaxAtomicCounterBufferSize;
 524
 525       /* ARB_compute_shader */
 526       unsigned MaxComputeAtomicCounterBuffers;
 527       unsigned MaxComputeAtomicCounters;
 528       unsigned MaxComputeImageUniforms;
 529       unsigned MaxComputeTextureImageUnits;
 530       unsigned MaxComputeUniformComponents;
 531       unsigned MaxComputeWorkGroupCount[3];
 532       unsigned MaxComputeWorkGroupSize[3];
 533
 534       /* ARB_shader_image_load_store */
 535       unsigned MaxImageUnits;
 536       unsigned MaxCombinedShaderOutputResources;
 537       unsigned MaxImageSamples;
 538       unsigned MaxVertexImageUniforms;
 539       unsigned MaxTessControlImageUniforms;
 540       unsigned MaxTessEvaluationImageUniforms;
 541       unsigned MaxGeometryImageUniforms;
 542       unsigned MaxFragmentImageUniforms;
 543       unsigned MaxCombinedImageUniforms;
 544
 545       /* ARB_viewport_array */
 546       unsigned MaxViewports;
 547
 548       /* ARB_tessellation_shader */
 549       unsigned MaxPatchVertices;
 550       unsigned MaxTessGenLevel;
 551       unsigned MaxTessControlInputComponents;
 552       unsigned MaxTessControlOutputComponents;
 553       unsigned MaxTessControlTextureImageUnits;
 554       unsigned MaxTessEvaluationInputComponents;
 555       unsigned MaxTessEvaluationOutputComponents;
 556       unsigned MaxTessEvaluationTextureImageUnits;
 557       unsigned MaxTessPatchComponents;
 558       unsigned MaxTessControlTotalOutputComponents;
 559       unsigned MaxTessControlUniformComponents;
 560       unsigned MaxTessEvaluationUniformComponents;
 561
 562       /* GL 4.5 / OES_sample_variables */
 563       unsigned MaxSamples;
 564    } Const;
 565
 566    /**
 567     * During AST to IR conversion, pointer to current IR function
 568     *
 569     * Will be \c NULL whenever the AST to IR conversion is not inside a
 570     * function definition.
 571     */
 572    class ir_function_signature *current_function;
 573
 574    /**
 575     * During AST to IR conversion, pointer to the toplevel IR
 576     * instruction list being generated.
 577     */
 578    exec_list *toplevel_ir;
 579
 580    /** Have we found a return statement in this function? */
 581    bool found_return;
 582
 583    /** Was there an error during compilation? */
 584    bool error;
 585
 586    /**
 587     * Are all shader inputs / outputs invariant?
 588     *
 589     * This is set when the 'STDGL invariant(all)' pragma is used.
 590     */
 591    bool all_invariant;
 592
 593    /** Loop or switch statement containing the current instructions. */
 594    class ast_iteration_statement *loop_nesting_ast;
 595
 596    struct glsl_switch_state switch_state;
 597
 598    /** List of structures defined in user code. */
 599    const glsl_type **user_structures;
 600    unsigned num_user_structures;
 601
 602    char *info_log;
 603
 604    /**
 605     * \name Enable bits for GLSL extensions
 606     */
 607    /*@{*/
 608    /* ARB extensions go here, sorted alphabetically.
 609     */
 610    bool ARB_ES3_1_compatibility_enable;
 611    bool ARB_ES3_1_compatibility_warn;
 612    bool ARB_ES3_2_compatibility_enable;
 613    bool ARB_ES3_2_compatibility_warn;
 614    bool ARB_arrays_of_arrays_enable;
 615    bool ARB_arrays_of_arrays_warn;
 616    bool ARB_bindless_texture_enable;
 617    bool ARB_bindless_texture_warn;
 618    bool ARB_compatibility_enable;
 619    bool ARB_compatibility_warn;
 620    bool ARB_compute_shader_enable;
 621    bool ARB_compute_shader_warn;
 622    bool ARB_compute_variable_group_size_enable;
 623    bool ARB_compute_variable_group_size_warn;
 624    bool ARB_conservative_depth_enable;
 625    bool ARB_conservative_depth_warn;
 626    bool ARB_cull_distance_enable;
 627    bool ARB_cull_distance_warn;
 628    bool ARB_derivative_control_enable;
 629    bool ARB_derivative_control_warn;
 630    bool ARB_draw_buffers_enable;
 631    bool ARB_draw_buffers_warn;
 632    bool ARB_draw_instanced_enable;
 633    bool ARB_draw_instanced_warn;
 634    bool ARB_enhanced_layouts_enable;
 635    bool ARB_enhanced_layouts_warn;
 636    bool ARB_explicit_attrib_location_enable;
 637    bool ARB_explicit_attrib_location_warn;
 638    bool ARB_explicit_uniform_location_enable;
 639    bool ARB_explicit_uniform_location_warn;
 640    bool ARB_fragment_coord_conventions_enable;
 641    bool ARB_fragment_coord_conventions_warn;
 642    bool ARB_fragment_layer_viewport_enable;
 643    bool ARB_fragment_layer_viewport_warn;
 644    bool ARB_fragment_shader_interlock_enable;
 645    bool ARB_fragment_shader_interlock_warn;
 646    bool ARB_gpu_shader5_enable;
 647    bool ARB_gpu_shader5_warn;
 648    bool ARB_gpu_shader_fp64_enable;
 649    bool ARB_gpu_shader_fp64_warn;
 650    bool ARB_gpu_shader_int64_enable;
 651    bool ARB_gpu_shader_int64_warn;
 652    bool ARB_post_depth_coverage_enable;
 653    bool ARB_post_depth_coverage_warn;
 654    bool ARB_sample_shading_enable;
 655    bool ARB_sample_shading_warn;
 656    bool ARB_separate_shader_objects_enable;
 657    bool ARB_separate_shader_objects_warn;
 658    bool ARB_shader_atomic_counter_ops_enable;
 659    bool ARB_shader_atomic_counter_ops_warn;
 660    bool ARB_shader_atomic_counters_enable;
 661    bool ARB_shader_atomic_counters_warn;
 662    bool ARB_shader_ballot_enable;
 663    bool ARB_shader_ballot_warn;
 664    bool ARB_shader_bit_encoding_enable;
 665    bool ARB_shader_bit_encoding_warn;
 666    bool ARB_shader_clock_enable;
 667    bool ARB_shader_clock_warn;
 668    bool ARB_shader_draw_parameters_enable;
 669    bool ARB_shader_draw_parameters_warn;
 670    bool ARB_shader_group_vote_enable;
 671    bool ARB_shader_group_vote_warn;
 672    bool ARB_shader_image_load_store_enable;
 673    bool ARB_shader_image_load_store_warn;
 674    bool ARB_shader_image_size_enable;
 675    bool ARB_shader_image_size_warn;
 676    bool ARB_shader_precision_enable;
 677    bool ARB_shader_precision_warn;
 678    bool ARB_shader_stencil_export_enable;
 679    bool ARB_shader_stencil_export_warn;
 680    bool ARB_shader_storage_buffer_object_enable;
 681    bool ARB_shader_storage_buffer_object_warn;
 682    bool ARB_shader_subroutine_enable;
 683    bool ARB_shader_subroutine_warn;
 684    bool ARB_shader_texture_image_samples_enable;
 685    bool ARB_shader_texture_image_samples_warn;
 686    bool ARB_shader_texture_lod_enable;
 687    bool ARB_shader_texture_lod_warn;
 688    bool ARB_shader_viewport_layer_array_enable;
 689    bool ARB_shader_viewport_layer_array_warn;
 690    bool ARB_shading_language_420pack_enable;
 691    bool ARB_shading_language_420pack_warn;
 692    bool ARB_shading_language_packing_enable;
 693    bool ARB_shading_language_packing_warn;
 694    bool ARB_tessellation_shader_enable;
 695    bool ARB_tessellation_shader_warn;
 696    bool ARB_texture_cube_map_array_enable;
 697    bool ARB_texture_cube_map_array_warn;
 698    bool ARB_texture_gather_enable;
 699    bool ARB_texture_gather_warn;
 700    bool ARB_texture_multisample_enable;
 701    bool ARB_texture_multisample_warn;
 702    bool ARB_texture_query_levels_enable;
 703    bool ARB_texture_query_levels_warn;
 704    bool ARB_texture_query_lod_enable;
 705    bool ARB_texture_query_lod_warn;
 706    bool ARB_texture_rectangle_enable;
 707    bool ARB_texture_rectangle_warn;
 708    bool ARB_uniform_buffer_object_enable;
 709    bool ARB_uniform_buffer_object_warn;
 710    bool ARB_vertex_attrib_64bit_enable;
 711    bool ARB_vertex_attrib_64bit_warn;
 712    bool ARB_viewport_array_enable;
 713    bool ARB_viewport_array_warn;
 714
 715    /* KHR extensions go here, sorted alphabetically.
 716     */
 717    bool KHR_blend_equation_advanced_enable;
 718    bool KHR_blend_equation_advanced_warn;
 719
 720    /* OES extensions go here, sorted alphabetically.
 721     */
 722    bool OES_EGL_image_external_enable;
 723    bool OES_EGL_image_external_warn;
 724    bool OES_EGL_image_external_essl3_enable;
 725    bool OES_EGL_image_external_essl3_warn;
 726    bool OES_geometry_point_size_enable;
 727    bool OES_geometry_point_size_warn;
 728    bool OES_geometry_shader_enable;
 729    bool OES_geometry_shader_warn;
 730    bool OES_gpu_shader5_enable;
 731    bool OES_gpu_shader5_warn;
 732    bool OES_primitive_bounding_box_enable;
 733    bool OES_primitive_bounding_box_warn;
 734    bool OES_sample_variables_enable;
 735    bool OES_sample_variables_warn;
 736    bool OES_shader_image_atomic_enable;
 737    bool OES_shader_image_atomic_warn;
 738    bool OES_shader_io_blocks_enable;
 739    bool OES_shader_io_blocks_warn;
 740    bool OES_shader_multisample_interpolation_enable;
 741    bool OES_shader_multisample_interpolation_warn;
 742    bool OES_standard_derivatives_enable;
 743    bool OES_standard_derivatives_warn;
 744    bool OES_tessellation_point_size_enable;
 745    bool OES_tessellation_point_size_warn;
 746    bool OES_tessellation_shader_enable;
 747    bool OES_tessellation_shader_warn;
 748    bool OES_texture_3D_enable;
 749    bool OES_texture_3D_warn;
 750    bool OES_texture_buffer_enable;
 751    bool OES_texture_buffer_warn;
 752    bool OES_texture_cube_map_array_enable;
 753    bool OES_texture_cube_map_array_warn;
 754    bool OES_texture_storage_multisample_2d_array_enable;
 755    bool OES_texture_storage_multisample_2d_array_warn;
 756    bool OES_viewport_array_enable;
 757    bool OES_viewport_array_warn;
 758
 759    /* All other extensions go here, sorted alphabetically.
 760     */
 761    bool AMD_conservative_depth_enable;
 762    bool AMD_conservative_depth_warn;
 763    bool AMD_gpu_shader_int64_enable;
 764    bool AMD_gpu_shader_int64_warn;
 765    bool AMD_shader_stencil_export_enable;
 766    bool AMD_shader_stencil_export_warn;
 767    bool AMD_shader_trinary_minmax_enable;
 768    bool AMD_shader_trinary_minmax_warn;
 769    bool AMD_vertex_shader_layer_enable;
 770    bool AMD_vertex_shader_layer_warn;
 771    bool AMD_vertex_shader_viewport_index_enable;
 772    bool AMD_vertex_shader_viewport_index_warn;
 773    bool ANDROID_extension_pack_es31a_enable;
 774    bool ANDROID_extension_pack_es31a_warn;
 775    bool EXT_blend_func_extended_enable;
 776    bool EXT_blend_func_extended_warn;
 777    bool EXT_clip_cull_distance_enable;
 778    bool EXT_clip_cull_distance_warn;
 779    bool EXT_draw_buffers_enable;
 780    bool EXT_draw_buffers_warn;
 781    bool EXT_frag_depth_enable;
 782    bool EXT_frag_depth_warn;
 783    bool EXT_geometry_point_size_enable;
 784    bool EXT_geometry_point_size_warn;
 785    bool EXT_geometry_shader_enable;
 786    bool EXT_geometry_shader_warn;
 787    bool EXT_gpu_shader5_enable;
 788    bool EXT_gpu_shader5_warn;
 789    bool EXT_primitive_bounding_box_enable;
 790    bool EXT_primitive_bounding_box_warn;
 791    bool EXT_separate_shader_objects_enable;
 792    bool EXT_separate_shader_objects_warn;
 793    bool EXT_shader_framebuffer_fetch_enable;
 794    bool EXT_shader_framebuffer_fetch_warn;
 795    bool EXT_shader_framebuffer_fetch_non_coherent_enable;
 796    bool EXT_shader_framebuffer_fetch_non_coherent_warn;
 797    bool EXT_shader_integer_mix_enable;
 798    bool EXT_shader_integer_mix_warn;
 799    bool EXT_shader_io_blocks_enable;
 800    bool EXT_shader_io_blocks_warn;
 801    bool EXT_shader_samples_identical_enable;
 802    bool EXT_shader_samples_identical_warn;
 803    bool EXT_tessellation_point_size_enable;
 804    bool EXT_tessellation_point_size_warn;
 805    bool EXT_tessellation_shader_enable;
 806    bool EXT_tessellation_shader_warn;
 807    bool EXT_texture_array_enable;
 808    bool EXT_texture_array_warn;
 809    bool EXT_texture_buffer_enable;
 810    bool EXT_texture_buffer_warn;
 811    bool EXT_texture_cube_map_array_enable;
 812    bool EXT_texture_cube_map_array_warn;
 813    bool INTEL_conservative_rasterization_enable;
 814    bool INTEL_conservative_rasterization_warn;
 815    bool INTEL_shader_atomic_float_minmax_enable;
 816    bool INTEL_shader_atomic_float_minmax_warn;
 817    bool MESA_shader_integer_functions_enable;
 818    bool MESA_shader_integer_functions_warn;
 819    bool NV_fragment_shader_interlock_enable;
 820    bool NV_fragment_shader_interlock_warn;
 821    bool NV_image_formats_enable;
 822    bool NV_image_formats_warn;
 823    bool NV_shader_atomic_float_enable;
 824    bool NV_shader_atomic_float_warn;
 825    /*@}*/
 826
 827    /** Extensions supported by the OpenGL implementation. */
 828    const struct gl_extensions *extensions;
 829
 830    bool uses_builtin_functions;
 831    bool fs_uses_gl_fragcoord;
 832
 833    /**
 834     * For geometry shaders, size of the most recently seen input declaration
 835     * that was a sized array, or 0 if no sized input array declarations have
 836     * been seen.
 837     *
 838     * Unused for other shader types.
 839     */
 840    unsigned gs_input_size;
 841
 842    bool fs_early_fragment_tests;
 843
 844    bool fs_inner_coverage;
 845
 846    bool fs_post_depth_coverage;
 847
 848    bool fs_pixel_interlock_ordered;
 849    bool fs_pixel_interlock_unordered;
 850    bool fs_sample_interlock_ordered;
 851    bool fs_sample_interlock_unordered;
 852
 853    unsigned fs_blend_support;
 854
 855    /**
 856     * For tessellation control shaders, size of the most recently seen output
 857     * declaration that was a sized array, or 0 if no sized output array
 858     * declarations have been seen.
 859     *
 860     * Unused for other shader types.
 861     */
 862    unsigned tcs_output_size;
 863
 864    /** Atomic counter offsets by binding */
 865    unsigned atomic_counter_offsets[MAX_COMBINED_ATOMIC_BUFFERS];
 866
 867    bool allow_extension_directive_midshader;
 868    bool allow_builtin_variable_redeclaration;
 869
 870    /**
 871     * Known subroutine type declarations.
 872     */
 873    int num_subroutine_types;
 874    ir_function **subroutine_types;
 875
 876    /**
 877     * Functions that are associated with
 878     * subroutine types.
 879     */
 880    int num_subroutines;
 881    ir_function **subroutines;
 882
 883    /**
 884     * field selection temporary parser storage -
 885     * did the parser just parse a dot.
 886     */
 887    bool is_field;
 888
 889    /**
 890     * seen values for clip/cull distance sizes
 891     * so we can check totals aren't too large.
 892     */
 893    unsigned clip_dist_size, cull_dist_size;
 894 };
 895
 896 # define YYLLOC_DEFAULT(Current, Rhs, N)                        \
 897 do {                                                            \
 898    if (N)                                                       \
 899    {                                                            \
 900       (Current).first_line   = YYRHSLOC(Rhs, 1).first_line;     \
 901       (Current).first_column = YYRHSLOC(Rhs, 1).first_column;   \
 902       (Current).last_line    = YYRHSLOC(Rhs, N).last_line;      \
 903       (Current).last_column  = YYRHSLOC(Rhs, N).last_column;    \
 904    }                                                            \
 905    else                                                         \
 906    {                                                            \
 907       (Current).first_line   = (Current).last_line =            \
 908          YYRHSLOC(Rhs, 0).last_line;                            \
 909       (Current).first_column = (Current).last_column =          \
 910          YYRHSLOC(Rhs, 0).last_column;                          \
 911    }                                                            \
 912    (Current).source = 0;                                        \
 913 } while (0)
 914
 915 /**
 916  * Emit a warning to the shader log
 917  *
 918  * \sa _mesa_glsl_error
 919  */
 920 extern void _mesa_glsl_warning(const YYLTYPE *locp,
 921                                _mesa_glsl_parse_state *state,
 922                                const char *fmt, ...);
 923
 924 extern void _mesa_glsl_lexer_ctor(struct _mesa_glsl_parse_state *state,
 925                                   const char *string);
 926
 927 extern void _mesa_glsl_lexer_dtor(struct _mesa_glsl_parse_state *state);
 928
 929 union YYSTYPE;
 930 extern int _mesa_glsl_lexer_lex(union YYSTYPE *yylval, YYLTYPE *yylloc,
 931                                 void *scanner);
 932
 933 extern int _mesa_glsl_parse(struct _mesa_glsl_parse_state *);
 934
 935 /**
 936  * Process elements of the #extension directive
 937  *
 938  * \return
 939  * If \c name and \c behavior are valid, \c true is returned.  Otherwise
 940  * \c false is returned.
 941  */
 942 extern bool _mesa_glsl_process_extension(const char *name, YYLTYPE *name_locp,
 943                                          const char *behavior,
 944                                          YYLTYPE *behavior_locp,
 945                                          _mesa_glsl_parse_state *state);
 946
 947 #endif /* __cplusplus */
 948
 949
 950 /*
 951  * These definitions apply to C and C++
 952  */
 953 #ifdef __cplusplus
 954 extern "C" {
 955 #endif
 956
 957 struct glcpp_parser;
 958
 959 typedef void (*glcpp_extension_iterator)(
 960               struct _mesa_glsl_parse_state *state,
 961               void (*add_builtin_define)(struct glcpp_parser *, const char *, int),
 962               struct glcpp_parser *data,
 963               unsigned version,
 964               bool es);
 965
 966 extern int glcpp_preprocess(void *ctx, const char **shader, char **info_log,
 967                             glcpp_extension_iterator extensions,
 968                             struct _mesa_glsl_parse_state *state,
 969                             struct gl_context *gl_ctx);
 970
 971 extern void _mesa_destroy_shader_compiler(void);
 972 extern void _mesa_destroy_shader_compiler_caches(void);
 973
 974 extern void
 975 _mesa_glsl_copy_symbols_from_table(struct exec_list *shader_ir,
 976                                    struct glsl_symbol_table *src,
 977                                    struct glsl_symbol_table *dest);
 978
 979 #ifdef __cplusplus
 980 }
 981 #endif
 982
 983
 984 #endif /* GLSL_PARSER_EXTRAS_H */