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    }
 261
 262    bool has_420pack() const
 263    {
 264       return ARB_shading_language_420pack_enable || is_version(420, 0);
 265    }
 266
 267    bool has_420pack_or_es31() const
 268    {
 269       return ARB_shading_language_420pack_enable || is_version(420, 310);
 270    }
 271
 272    bool has_compute_shader() const
 273    {
 274       return ARB_compute_shader_enable || is_version(430, 310);
 275    }
 276
 277    bool has_shader_io_blocks() const
 278    {
 279       /* The OES_geometry_shader_specification says:
 280        *
 281        *    "If the OES_geometry_shader extension is enabled, the
 282        *     OES_shader_io_blocks extension is also implicitly enabled."
 283        *
 284        * The OES_tessellation_shader extension has similar wording.
 285        */
 286       return OES_shader_io_blocks_enable ||
 287              EXT_shader_io_blocks_enable ||
 288              OES_geometry_shader_enable ||
 289              EXT_geometry_shader_enable ||
 290              OES_tessellation_shader_enable ||
 291              EXT_tessellation_shader_enable ||
 292
 293              is_version(150, 320);
 294    }
 295
 296    bool has_geometry_shader() const
 297    {
 298       return OES_geometry_shader_enable || EXT_geometry_shader_enable ||
 299              is_version(150, 320);
 300    }
 301
 302    bool has_tessellation_shader() const
 303    {
 304       return ARB_tessellation_shader_enable ||
 305              OES_tessellation_shader_enable ||
 306              EXT_tessellation_shader_enable ||
 307              is_version(400, 320);
 308    }
 309
 310    bool has_clip_distance() const
 311    {
 312       return EXT_clip_cull_distance_enable || is_version(130, 0);
 313    }
 314
 315    bool has_cull_distance() const
 316    {
 317       return EXT_clip_cull_distance_enable ||
 318              ARB_cull_distance_enable ||
 319              is_version(450, 0);
 320    }
 321
 322    bool has_framebuffer_fetch() const
 323    {
 324       return EXT_shader_framebuffer_fetch_enable ||
 325              EXT_shader_framebuffer_fetch_non_coherent_enable;
 326    }
 327
 328    bool has_texture_cube_map_array() const
 329    {
 330       return ARB_texture_cube_map_array_enable ||
 331              EXT_texture_cube_map_array_enable ||
 332              OES_texture_cube_map_array_enable ||
 333              is_version(400, 320);
 334    }
 335
 336    bool has_shader_image_load_store() const
 337    {
 338       return ARB_shader_image_load_store_enable || is_version(420, 310);
 339    }
 340
 341    bool has_bindless() const
 342    {
 343       return ARB_bindless_texture_enable;
 344    }
 345
 346    void process_version_directive(YYLTYPE *locp, int version,
 347                                   const char *ident);
 348
 349    struct gl_context *const ctx;
 350    void *scanner;
 351    exec_list translation_unit;
 352    glsl_symbol_table *symbols;
 353
 354    void *linalloc;
 355
 356    unsigned num_supported_versions;
 357    struct {
 358       unsigned ver;
 359       uint8_t gl_ver;
 360       bool es;
 361    } supported_versions[17];
 362
 363    bool es_shader;
 364    bool compat_shader;
 365    unsigned language_version;
 366    unsigned forced_language_version;
 367    bool zero_init;
 368    unsigned gl_version;
 369    gl_shader_stage stage;
 370
 371    /**
 372     * Default uniform layout qualifiers tracked during parsing.
 373     * Currently affects uniform blocks and uniform buffer variables in
 374     * those blocks.
 375     */
 376    struct ast_type_qualifier *default_uniform_qualifier;
 377
 378    /**
 379     * Default shader storage layout qualifiers tracked during parsing.
 380     * Currently affects shader storage blocks and shader storage buffer
 381     * variables in those blocks.
 382     */
 383    struct ast_type_qualifier *default_shader_storage_qualifier;
 384
 385    /**
 386     * Variables to track different cases if a fragment shader redeclares
 387     * built-in variable gl_FragCoord.
 388     *
 389     * Note: These values are computed at ast_to_hir time rather than at parse
 390     * time.
 391     */
 392    bool fs_redeclares_gl_fragcoord;
 393    bool fs_origin_upper_left;
 394    bool fs_pixel_center_integer;
 395    bool fs_redeclares_gl_fragcoord_with_no_layout_qualifiers;
 396
 397    /**
 398     * True if a geometry shader input primitive type or tessellation control
 399     * output vertices were specified using a layout directive.
 400     *
 401     * Note: these values are computed at ast_to_hir time rather than at parse
 402     * time.
 403     */
 404    bool gs_input_prim_type_specified;
 405    bool tcs_output_vertices_specified;
 406
 407    /**
 408     * Input layout qualifiers from GLSL 1.50 (geometry shader controls),
 409     * and GLSL 4.00 (tessellation evaluation shader)
 410     */
 411    struct ast_type_qualifier *in_qualifier;
 412
 413    /**
 414     * True if a compute shader input local size was specified using a layout
 415     * directive.
 416     *
 417     * Note: this value is computed at ast_to_hir time rather than at parse
 418     * time.
 419     */
 420    bool cs_input_local_size_specified;
 421
 422    /**
 423     * If cs_input_local_size_specified is true, the local size that was
 424     * specified.  Otherwise ignored.
 425     */
 426    unsigned cs_input_local_size[3];
 427
 428    /**
 429     * True if a compute shader input local variable size was specified using
 430     * a layout directive as specified by ARB_compute_variable_group_size.
 431     */
 432    bool cs_input_local_size_variable_specified;
 433
 434    /**
 435     * True if a shader declare bindless_sampler/bindless_image, and
 436     * respectively bound_sampler/bound_image at global scope as specified by
 437     * ARB_bindless_texture.
 438     */
 439    bool bindless_sampler_specified;
 440    bool bindless_image_specified;
 441    bool bound_sampler_specified;
 442    bool bound_image_specified;
 443
 444    /**
 445     * Output layout qualifiers from GLSL 1.50 (geometry shader controls),
 446     * and GLSL 4.00 (tessellation control shader).
 447     */
 448    struct ast_type_qualifier *out_qualifier;
 449
 450    /**
 451     * Printable list of GLSL versions supported by the current context
 452     *
 453     * \note
 454     * This string should probably be generated per-context instead of per
 455     * invokation of the compiler.  This should be changed when the method of
 456     * tracking supported GLSL versions changes.
 457     */
 458    const char *supported_version_string;
 459
 460    /**
 461     * Implementation defined limits that affect built-in variables, etc.
 462     *
 463     * \sa struct gl_constants (in mtypes.h)
 464     */
 465    struct {
 466       /* 1.10 */
 467       unsigned MaxLights;
 468       unsigned MaxClipPlanes;
 469       unsigned MaxTextureUnits;
 470       unsigned MaxTextureCoords;
 471       unsigned MaxVertexAttribs;
 472       unsigned MaxVertexUniformComponents;
 473       unsigned MaxVertexTextureImageUnits;
 474       unsigned MaxCombinedTextureImageUnits;
 475       unsigned MaxTextureImageUnits;
 476       unsigned MaxFragmentUniformComponents;
 477
 478       /* ARB_draw_buffers */
 479       unsigned MaxDrawBuffers;
 480
 481       /* ARB_enhanced_layouts */
 482       unsigned MaxTransformFeedbackBuffers;
 483       unsigned MaxTransformFeedbackInterleavedComponents;
 484
 485       /* ARB_blend_func_extended */
 486       unsigned MaxDualSourceDrawBuffers;
 487
 488       /* 3.00 ES */
 489       int MinProgramTexelOffset;
 490       int MaxProgramTexelOffset;
 491
 492       /* 1.50 */
 493       unsigned MaxVertexOutputComponents;
 494       unsigned MaxGeometryInputComponents;
 495       unsigned MaxGeometryOutputComponents;
 496       unsigned MaxGeometryShaderInvocations;
 497       unsigned MaxFragmentInputComponents;
 498       unsigned MaxGeometryTextureImageUnits;
 499       unsigned MaxGeometryOutputVertices;
 500       unsigned MaxGeometryTotalOutputComponents;
 501       unsigned MaxGeometryUniformComponents;
 502
 503       /* ARB_shader_atomic_counters */
 504       unsigned MaxVertexAtomicCounters;
 505       unsigned MaxTessControlAtomicCounters;
 506       unsigned MaxTessEvaluationAtomicCounters;
 507       unsigned MaxGeometryAtomicCounters;
 508       unsigned MaxFragmentAtomicCounters;
 509       unsigned MaxCombinedAtomicCounters;
 510       unsigned MaxAtomicBufferBindings;
 511
 512       /* These are also atomic counter related, but they weren't added to
 513        * until atomic counters were added to core in GLSL 4.20 and GLSL ES
 514        * 3.10.
 515        */
 516       unsigned MaxVertexAtomicCounterBuffers;
 517       unsigned MaxTessControlAtomicCounterBuffers;
 518       unsigned MaxTessEvaluationAtomicCounterBuffers;
 519       unsigned MaxGeometryAtomicCounterBuffers;
 520       unsigned MaxFragmentAtomicCounterBuffers;
 521       unsigned MaxCombinedAtomicCounterBuffers;
 522       unsigned MaxAtomicCounterBufferSize;
 523
 524       /* ARB_compute_shader */
 525       unsigned MaxComputeAtomicCounterBuffers;
 526       unsigned MaxComputeAtomicCounters;
 527       unsigned MaxComputeImageUniforms;
 528       unsigned MaxComputeTextureImageUnits;
 529       unsigned MaxComputeUniformComponents;
 530       unsigned MaxComputeWorkGroupCount[3];
 531       unsigned MaxComputeWorkGroupSize[3];
 532
 533       /* ARB_shader_image_load_store */
 534       unsigned MaxImageUnits;
 535       unsigned MaxCombinedShaderOutputResources;
 536       unsigned MaxImageSamples;
 537       unsigned MaxVertexImageUniforms;
 538       unsigned MaxTessControlImageUniforms;
 539       unsigned MaxTessEvaluationImageUniforms;
 540       unsigned MaxGeometryImageUniforms;
 541       unsigned MaxFragmentImageUniforms;
 542       unsigned MaxCombinedImageUniforms;
 543
 544       /* ARB_viewport_array */
 545       unsigned MaxViewports;
 546
 547       /* ARB_tessellation_shader */
 548       unsigned MaxPatchVertices;
 549       unsigned MaxTessGenLevel;
 550       unsigned MaxTessControlInputComponents;
 551       unsigned MaxTessControlOutputComponents;
 552       unsigned MaxTessControlTextureImageUnits;
 553       unsigned MaxTessEvaluationInputComponents;
 554       unsigned MaxTessEvaluationOutputComponents;
 555       unsigned MaxTessEvaluationTextureImageUnits;
 556       unsigned MaxTessPatchComponents;
 557       unsigned MaxTessControlTotalOutputComponents;
 558       unsigned MaxTessControlUniformComponents;
 559       unsigned MaxTessEvaluationUniformComponents;
 560
 561       /* GL 4.5 / OES_sample_variables */
 562       unsigned MaxSamples;
 563    } Const;
 564
 565    /**
 566     * During AST to IR conversion, pointer to current IR function
 567     *
 568     * Will be \c NULL whenever the AST to IR conversion is not inside a
 569     * function definition.
 570     */
 571    class ir_function_signature *current_function;
 572
 573    /**
 574     * During AST to IR conversion, pointer to the toplevel IR
 575     * instruction list being generated.
 576     */
 577    exec_list *toplevel_ir;
 578
 579    /** Have we found a return statement in this function? */
 580    bool found_return;
 581
 582    /** Was there an error during compilation? */
 583    bool error;
 584
 585    /**
 586     * Are all shader inputs / outputs invariant?
 587     *
 588     * This is set when the 'STDGL invariant(all)' pragma is used.
 589     */
 590    bool all_invariant;
 591
 592    /** Loop or switch statement containing the current instructions. */
 593    class ast_iteration_statement *loop_nesting_ast;
 594
 595    struct glsl_switch_state switch_state;
 596
 597    /** List of structures defined in user code. */
 598    const glsl_type **user_structures;
 599    unsigned num_user_structures;
 600
 601    char *info_log;
 602
 603    /**
 604     * \name Enable bits for GLSL extensions
 605     */
 606    /*@{*/
 607    /* ARB extensions go here, sorted alphabetically.
 608     */
 609    bool ARB_ES3_1_compatibility_enable;
 610    bool ARB_ES3_1_compatibility_warn;
 611    bool ARB_ES3_2_compatibility_enable;
 612    bool ARB_ES3_2_compatibility_warn;
 613    bool ARB_arrays_of_arrays_enable;
 614    bool ARB_arrays_of_arrays_warn;
 615    bool ARB_bindless_texture_enable;
 616    bool ARB_bindless_texture_warn;
 617    bool ARB_compatibility_enable;
 618    bool ARB_compatibility_warn;
 619    bool ARB_compute_shader_enable;
 620    bool ARB_compute_shader_warn;
 621    bool ARB_compute_variable_group_size_enable;
 622    bool ARB_compute_variable_group_size_warn;
 623    bool ARB_conservative_depth_enable;
 624    bool ARB_conservative_depth_warn;
 625    bool ARB_cull_distance_enable;
 626    bool ARB_cull_distance_warn;
 627    bool ARB_derivative_control_enable;
 628    bool ARB_derivative_control_warn;
 629    bool ARB_draw_buffers_enable;
 630    bool ARB_draw_buffers_warn;
 631    bool ARB_draw_instanced_enable;
 632    bool ARB_draw_instanced_warn;
 633    bool ARB_enhanced_layouts_enable;
 634    bool ARB_enhanced_layouts_warn;
 635    bool ARB_explicit_attrib_location_enable;
 636    bool ARB_explicit_attrib_location_warn;
 637    bool ARB_explicit_uniform_location_enable;
 638    bool ARB_explicit_uniform_location_warn;
 639    bool ARB_fragment_coord_conventions_enable;
 640    bool ARB_fragment_coord_conventions_warn;
 641    bool ARB_fragment_layer_viewport_enable;
 642    bool ARB_fragment_layer_viewport_warn;
 643    bool ARB_fragment_shader_interlock_enable;
 644    bool ARB_fragment_shader_interlock_warn;
 645    bool ARB_gpu_shader5_enable;
 646    bool ARB_gpu_shader5_warn;
 647    bool ARB_gpu_shader_fp64_enable;
 648    bool ARB_gpu_shader_fp64_warn;
 649    bool ARB_gpu_shader_int64_enable;
 650    bool ARB_gpu_shader_int64_warn;
 651    bool ARB_post_depth_coverage_enable;
 652    bool ARB_post_depth_coverage_warn;
 653    bool ARB_sample_shading_enable;
 654    bool ARB_sample_shading_warn;
 655    bool ARB_separate_shader_objects_enable;
 656    bool ARB_separate_shader_objects_warn;
 657    bool ARB_shader_atomic_counter_ops_enable;
 658    bool ARB_shader_atomic_counter_ops_warn;
 659    bool ARB_shader_atomic_counters_enable;
 660    bool ARB_shader_atomic_counters_warn;
 661    bool ARB_shader_ballot_enable;
 662    bool ARB_shader_ballot_warn;
 663    bool ARB_shader_bit_encoding_enable;
 664    bool ARB_shader_bit_encoding_warn;
 665    bool ARB_shader_clock_enable;
 666    bool ARB_shader_clock_warn;
 667    bool ARB_shader_draw_parameters_enable;
 668    bool ARB_shader_draw_parameters_warn;
 669    bool ARB_shader_group_vote_enable;
 670    bool ARB_shader_group_vote_warn;
 671    bool ARB_shader_image_load_store_enable;
 672    bool ARB_shader_image_load_store_warn;
 673    bool ARB_shader_image_size_enable;
 674    bool ARB_shader_image_size_warn;
 675    bool ARB_shader_precision_enable;
 676    bool ARB_shader_precision_warn;
 677    bool ARB_shader_stencil_export_enable;
 678    bool ARB_shader_stencil_export_warn;
 679    bool ARB_shader_storage_buffer_object_enable;
 680    bool ARB_shader_storage_buffer_object_warn;
 681    bool ARB_shader_subroutine_enable;
 682    bool ARB_shader_subroutine_warn;
 683    bool ARB_shader_texture_image_samples_enable;
 684    bool ARB_shader_texture_image_samples_warn;
 685    bool ARB_shader_texture_lod_enable;
 686    bool ARB_shader_texture_lod_warn;
 687    bool ARB_shader_viewport_layer_array_enable;
 688    bool ARB_shader_viewport_layer_array_warn;
 689    bool ARB_shading_language_420pack_enable;
 690    bool ARB_shading_language_420pack_warn;
 691    bool ARB_shading_language_packing_enable;
 692    bool ARB_shading_language_packing_warn;
 693    bool ARB_tessellation_shader_enable;
 694    bool ARB_tessellation_shader_warn;
 695    bool ARB_texture_cube_map_array_enable;
 696    bool ARB_texture_cube_map_array_warn;
 697    bool ARB_texture_gather_enable;
 698    bool ARB_texture_gather_warn;
 699    bool ARB_texture_multisample_enable;
 700    bool ARB_texture_multisample_warn;
 701    bool ARB_texture_query_levels_enable;
 702    bool ARB_texture_query_levels_warn;
 703    bool ARB_texture_query_lod_enable;
 704    bool ARB_texture_query_lod_warn;
 705    bool ARB_texture_rectangle_enable;
 706    bool ARB_texture_rectangle_warn;
 707    bool ARB_uniform_buffer_object_enable;
 708    bool ARB_uniform_buffer_object_warn;
 709    bool ARB_vertex_attrib_64bit_enable;
 710    bool ARB_vertex_attrib_64bit_warn;
 711    bool ARB_viewport_array_enable;
 712    bool ARB_viewport_array_warn;
 713
 714    /* KHR extensions go here, sorted alphabetically.
 715     */
 716    bool KHR_blend_equation_advanced_enable;
 717    bool KHR_blend_equation_advanced_warn;
 718
 719    /* OES extensions go here, sorted alphabetically.
 720     */
 721    bool OES_EGL_image_external_enable;
 722    bool OES_EGL_image_external_warn;
 723    bool OES_EGL_image_external_essl3_enable;
 724    bool OES_EGL_image_external_essl3_warn;
 725    bool OES_geometry_point_size_enable;
 726    bool OES_geometry_point_size_warn;
 727    bool OES_geometry_shader_enable;
 728    bool OES_geometry_shader_warn;
 729    bool OES_gpu_shader5_enable;
 730    bool OES_gpu_shader5_warn;
 731    bool OES_primitive_bounding_box_enable;
 732    bool OES_primitive_bounding_box_warn;
 733    bool OES_sample_variables_enable;
 734    bool OES_sample_variables_warn;
 735    bool OES_shader_image_atomic_enable;
 736    bool OES_shader_image_atomic_warn;
 737    bool OES_shader_io_blocks_enable;
 738    bool OES_shader_io_blocks_warn;
 739    bool OES_shader_multisample_interpolation_enable;
 740    bool OES_shader_multisample_interpolation_warn;
 741    bool OES_standard_derivatives_enable;
 742    bool OES_standard_derivatives_warn;
 743    bool OES_tessellation_point_size_enable;
 744    bool OES_tessellation_point_size_warn;
 745    bool OES_tessellation_shader_enable;
 746    bool OES_tessellation_shader_warn;
 747    bool OES_texture_3D_enable;
 748    bool OES_texture_3D_warn;
 749    bool OES_texture_buffer_enable;
 750    bool OES_texture_buffer_warn;
 751    bool OES_texture_cube_map_array_enable;
 752    bool OES_texture_cube_map_array_warn;
 753    bool OES_texture_storage_multisample_2d_array_enable;
 754    bool OES_texture_storage_multisample_2d_array_warn;
 755    bool OES_viewport_array_enable;
 756    bool OES_viewport_array_warn;
 757
 758    /* All other extensions go here, sorted alphabetically.
 759     */
 760    bool AMD_conservative_depth_enable;
 761    bool AMD_conservative_depth_warn;
 762    bool AMD_shader_stencil_export_enable;
 763    bool AMD_shader_stencil_export_warn;
 764    bool AMD_shader_trinary_minmax_enable;
 765    bool AMD_shader_trinary_minmax_warn;
 766    bool AMD_vertex_shader_layer_enable;
 767    bool AMD_vertex_shader_layer_warn;
 768    bool AMD_vertex_shader_viewport_index_enable;
 769    bool AMD_vertex_shader_viewport_index_warn;
 770    bool ANDROID_extension_pack_es31a_enable;
 771    bool ANDROID_extension_pack_es31a_warn;
 772    bool EXT_blend_func_extended_enable;
 773    bool EXT_blend_func_extended_warn;
 774    bool EXT_clip_cull_distance_enable;
 775    bool EXT_clip_cull_distance_warn;
 776    bool EXT_draw_buffers_enable;
 777    bool EXT_draw_buffers_warn;
 778    bool EXT_frag_depth_enable;
 779    bool EXT_frag_depth_warn;
 780    bool EXT_geometry_point_size_enable;
 781    bool EXT_geometry_point_size_warn;
 782    bool EXT_geometry_shader_enable;
 783    bool EXT_geometry_shader_warn;
 784    bool EXT_gpu_shader5_enable;
 785    bool EXT_gpu_shader5_warn;
 786    bool EXT_primitive_bounding_box_enable;
 787    bool EXT_primitive_bounding_box_warn;
 788    bool EXT_separate_shader_objects_enable;
 789    bool EXT_separate_shader_objects_warn;
 790    bool EXT_shader_framebuffer_fetch_enable;
 791    bool EXT_shader_framebuffer_fetch_warn;
 792    bool EXT_shader_framebuffer_fetch_non_coherent_enable;
 793    bool EXT_shader_framebuffer_fetch_non_coherent_warn;
 794    bool EXT_shader_integer_mix_enable;
 795    bool EXT_shader_integer_mix_warn;
 796    bool EXT_shader_io_blocks_enable;
 797    bool EXT_shader_io_blocks_warn;
 798    bool EXT_shader_samples_identical_enable;
 799    bool EXT_shader_samples_identical_warn;
 800    bool EXT_tessellation_point_size_enable;
 801    bool EXT_tessellation_point_size_warn;
 802    bool EXT_tessellation_shader_enable;
 803    bool EXT_tessellation_shader_warn;
 804    bool EXT_texture_array_enable;
 805    bool EXT_texture_array_warn;
 806    bool EXT_texture_buffer_enable;
 807    bool EXT_texture_buffer_warn;
 808    bool EXT_texture_cube_map_array_enable;
 809    bool EXT_texture_cube_map_array_warn;
 810    bool INTEL_conservative_rasterization_enable;
 811    bool INTEL_conservative_rasterization_warn;
 812    bool INTEL_shader_atomic_float_minmax_enable;
 813    bool INTEL_shader_atomic_float_minmax_warn;
 814    bool MESA_shader_integer_functions_enable;
 815    bool MESA_shader_integer_functions_warn;
 816    bool NV_fragment_shader_interlock_enable;
 817    bool NV_fragment_shader_interlock_warn;
 818    bool NV_image_formats_enable;
 819    bool NV_image_formats_warn;
 820    bool NV_shader_atomic_float_enable;
 821    bool NV_shader_atomic_float_warn;
 822    /*@}*/
 823
 824    /** Extensions supported by the OpenGL implementation. */
 825    const struct gl_extensions *extensions;
 826
 827    bool uses_builtin_functions;
 828    bool fs_uses_gl_fragcoord;
 829
 830    /**
 831     * For geometry shaders, size of the most recently seen input declaration
 832     * that was a sized array, or 0 if no sized input array declarations have
 833     * been seen.
 834     *
 835     * Unused for other shader types.
 836     */
 837    unsigned gs_input_size;
 838
 839    bool fs_early_fragment_tests;
 840
 841    bool fs_inner_coverage;
 842
 843    bool fs_post_depth_coverage;
 844
 845    bool fs_pixel_interlock_ordered;
 846    bool fs_pixel_interlock_unordered;
 847    bool fs_sample_interlock_ordered;
 848    bool fs_sample_interlock_unordered;
 849
 850    unsigned fs_blend_support;
 851
 852    /**
 853     * For tessellation control shaders, size of the most recently seen output
 854     * declaration that was a sized array, or 0 if no sized output array
 855     * declarations have been seen.
 856     *
 857     * Unused for other shader types.
 858     */
 859    unsigned tcs_output_size;
 860
 861    /** Atomic counter offsets by binding */
 862    unsigned atomic_counter_offsets[MAX_COMBINED_ATOMIC_BUFFERS];
 863
 864    bool allow_extension_directive_midshader;
 865    bool allow_builtin_variable_redeclaration;
 866
 867    /**
 868     * Known subroutine type declarations.
 869     */
 870    int num_subroutine_types;
 871    ir_function **subroutine_types;
 872
 873    /**
 874     * Functions that are associated with
 875     * subroutine types.
 876     */
 877    int num_subroutines;
 878    ir_function **subroutines;
 879
 880    /**
 881     * field selection temporary parser storage -
 882     * did the parser just parse a dot.
 883     */
 884    bool is_field;
 885
 886    /**
 887     * seen values for clip/cull distance sizes
 888     * so we can check totals aren't too large.
 889     */
 890    unsigned clip_dist_size, cull_dist_size;
 891 };
 892
 893 # define YYLLOC_DEFAULT(Current, Rhs, N)                        \
 894 do {                                                            \
 895    if (N)                                                       \
 896    {                                                            \
 897       (Current).first_line   = YYRHSLOC(Rhs, 1).first_line;     \
 898       (Current).first_column = YYRHSLOC(Rhs, 1).first_column;   \
 899       (Current).last_line    = YYRHSLOC(Rhs, N).last_line;      \
 900       (Current).last_column  = YYRHSLOC(Rhs, N).last_column;    \
 901    }                                                            \
 902    else                                                         \
 903    {                                                            \
 904       (Current).first_line   = (Current).last_line =            \
 905          YYRHSLOC(Rhs, 0).last_line;                            \
 906       (Current).first_column = (Current).last_column =          \
 907          YYRHSLOC(Rhs, 0).last_column;                          \
 908    }                                                            \
 909    (Current).source = 0;                                        \
 910 } while (0)
 911
 912 /**
 913  * Emit a warning to the shader log
 914  *
 915  * \sa _mesa_glsl_error
 916  */
 917 extern void _mesa_glsl_warning(const YYLTYPE *locp,
 918                                _mesa_glsl_parse_state *state,
 919                                const char *fmt, ...);
 920
 921 extern void _mesa_glsl_lexer_ctor(struct _mesa_glsl_parse_state *state,
 922                                   const char *string);
 923
 924 extern void _mesa_glsl_lexer_dtor(struct _mesa_glsl_parse_state *state);
 925
 926 union YYSTYPE;
 927 extern int _mesa_glsl_lexer_lex(union YYSTYPE *yylval, YYLTYPE *yylloc,
 928                                 void *scanner);
 929
 930 extern int _mesa_glsl_parse(struct _mesa_glsl_parse_state *);
 931
 932 /**
 933  * Process elements of the #extension directive
 934  *
 935  * \return
 936  * If \c name and \c behavior are valid, \c true is returned.  Otherwise
 937  * \c false is returned.
 938  */
 939 extern bool _mesa_glsl_process_extension(const char *name, YYLTYPE *name_locp,
 940                                          const char *behavior,
 941                                          YYLTYPE *behavior_locp,
 942                                          _mesa_glsl_parse_state *state);
 943
 944 #endif /* __cplusplus */
 945
 946
 947 /*
 948  * These definitions apply to C and C++
 949  */
 950 #ifdef __cplusplus
 951 extern "C" {
 952 #endif
 953
 954 struct glcpp_parser;
 955
 956 typedef void (*glcpp_extension_iterator)(
 957               struct _mesa_glsl_parse_state *state,
 958               void (*add_builtin_define)(struct glcpp_parser *, const char *, int),
 959               struct glcpp_parser *data,
 960               unsigned version,
 961               bool es);
 962
 963 extern int glcpp_preprocess(void *ctx, const char **shader, char **info_log,
 964                             glcpp_extension_iterator extensions,
 965                             struct _mesa_glsl_parse_state *state,
 966                             struct gl_context *gl_ctx);
 967
 968 extern void _mesa_destroy_shader_compiler(void);
 969 extern void _mesa_destroy_shader_compiler_caches(void);
 970
 971 extern void
 972 _mesa_glsl_copy_symbols_from_table(struct exec_list *shader_ir,
 973                                    struct glsl_symbol_table *src,
 974                                    struct glsl_symbol_table *dest);
 975
 976 #ifdef __cplusplus
 977 }
 978 #endif
 979
 980
 981 #endif /* GLSL_PARSER_EXTRAS_H */