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