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