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       return OES_shader_io_blocks_enable ||
 271              EXT_shader_io_blocks_enable ||
 272              is_version(150, 320);
 273    }
 274
 275    bool has_geometry_shader() const
 276    {
 277       return OES_geometry_shader_enable || is_version(150, 320);
 278    }
 279
 280    bool has_clip_distance() const
 281    {
 282       return EXT_clip_cull_distance_enable || is_version(130, 0);
 283    }
 284
 285    bool has_cull_distance() const
 286    {
 287       return EXT_clip_cull_distance_enable ||
 288              ARB_cull_distance_enable ||
 289              is_version(450, 0);
 290    }
 291
 292    void process_version_directive(YYLTYPE *locp, int version,
 293                                   const char *ident);
 294
 295    struct gl_context *const ctx;
 296    void *scanner;
 297    exec_list translation_unit;
 298    glsl_symbol_table *symbols;
 299
 300    unsigned num_supported_versions;
 301    struct {
 302       unsigned ver;
 303       bool es;
 304    } supported_versions[15];
 305
 306    bool es_shader;
 307    unsigned language_version;
 308    unsigned forced_language_version;
 309    bool zero_init;
 310    gl_shader_stage stage;
 311
 312    /**
 313     * Default uniform layout qualifiers tracked during parsing.
 314     * Currently affects uniform blocks and uniform buffer variables in
 315     * those blocks.
 316     */
 317    struct ast_type_qualifier *default_uniform_qualifier;
 318
 319    /**
 320     * Default shader storage layout qualifiers tracked during parsing.
 321     * Currently affects shader storage blocks and shader storage buffer
 322     * variables in those blocks.
 323     */
 324    struct ast_type_qualifier *default_shader_storage_qualifier;
 325
 326    /**
 327     * Variables to track different cases if a fragment shader redeclares
 328     * built-in variable gl_FragCoord.
 329     *
 330     * Note: These values are computed at ast_to_hir time rather than at parse
 331     * time.
 332     */
 333    bool fs_redeclares_gl_fragcoord;
 334    bool fs_origin_upper_left;
 335    bool fs_pixel_center_integer;
 336    bool fs_redeclares_gl_fragcoord_with_no_layout_qualifiers;
 337
 338    /**
 339     * True if a geometry shader input primitive type or tessellation control
 340     * output vertices were specified using a layout directive.
 341     *
 342     * Note: these values are computed at ast_to_hir time rather than at parse
 343     * time.
 344     */
 345    bool gs_input_prim_type_specified;
 346    bool tcs_output_vertices_specified;
 347
 348    /**
 349     * Input layout qualifiers from GLSL 1.50 (geometry shader controls),
 350     * and GLSL 4.00 (tessellation evaluation shader)
 351     */
 352    struct ast_type_qualifier *in_qualifier;
 353
 354    /**
 355     * True if a compute shader input local size was specified using a layout
 356     * directive.
 357     *
 358     * Note: this value is computed at ast_to_hir time rather than at parse
 359     * time.
 360     */
 361    bool cs_input_local_size_specified;
 362
 363    /**
 364     * If cs_input_local_size_specified is true, the local size that was
 365     * specified.  Otherwise ignored.
 366     */
 367    unsigned cs_input_local_size[3];
 368
 369    /**
 370     * Output layout qualifiers from GLSL 1.50 (geometry shader controls),
 371     * and GLSL 4.00 (tessellation control shader).
 372     */
 373    struct ast_type_qualifier *out_qualifier;
 374
 375    /**
 376     * Printable list of GLSL versions supported by the current context
 377     *
 378     * \note
 379     * This string should probably be generated per-context instead of per
 380     * invokation of the compiler.  This should be changed when the method of
 381     * tracking supported GLSL versions changes.
 382     */
 383    const char *supported_version_string;
 384
 385    /**
 386     * Implementation defined limits that affect built-in variables, etc.
 387     *
 388     * \sa struct gl_constants (in mtypes.h)
 389     */
 390    struct {
 391       /* 1.10 */
 392       unsigned MaxLights;
 393       unsigned MaxClipPlanes;
 394       unsigned MaxTextureUnits;
 395       unsigned MaxTextureCoords;
 396       unsigned MaxVertexAttribs;
 397       unsigned MaxVertexUniformComponents;
 398       unsigned MaxVertexTextureImageUnits;
 399       unsigned MaxCombinedTextureImageUnits;
 400       unsigned MaxTextureImageUnits;
 401       unsigned MaxFragmentUniformComponents;
 402
 403       /* ARB_draw_buffers */
 404       unsigned MaxDrawBuffers;
 405
 406       /* ARB_enhanced_layouts */
 407       unsigned MaxTransformFeedbackBuffers;
 408       unsigned MaxTransformFeedbackInterleavedComponents;
 409
 410       /* ARB_blend_func_extended */
 411       unsigned MaxDualSourceDrawBuffers;
 412
 413       /* 3.00 ES */
 414       int MinProgramTexelOffset;
 415       int MaxProgramTexelOffset;
 416
 417       /* 1.50 */
 418       unsigned MaxVertexOutputComponents;
 419       unsigned MaxGeometryInputComponents;
 420       unsigned MaxGeometryOutputComponents;
 421       unsigned MaxFragmentInputComponents;
 422       unsigned MaxGeometryTextureImageUnits;
 423       unsigned MaxGeometryOutputVertices;
 424       unsigned MaxGeometryTotalOutputComponents;
 425       unsigned MaxGeometryUniformComponents;
 426
 427       /* ARB_shader_atomic_counters */
 428       unsigned MaxVertexAtomicCounters;
 429       unsigned MaxTessControlAtomicCounters;
 430       unsigned MaxTessEvaluationAtomicCounters;
 431       unsigned MaxGeometryAtomicCounters;
 432       unsigned MaxFragmentAtomicCounters;
 433       unsigned MaxCombinedAtomicCounters;
 434       unsigned MaxAtomicBufferBindings;
 435
 436       /* These are also atomic counter related, but they weren't added to
 437        * until atomic counters were added to core in GLSL 4.20 and GLSL ES
 438        * 3.10.
 439        */
 440       unsigned MaxVertexAtomicCounterBuffers;
 441       unsigned MaxTessControlAtomicCounterBuffers;
 442       unsigned MaxTessEvaluationAtomicCounterBuffers;
 443       unsigned MaxGeometryAtomicCounterBuffers;
 444       unsigned MaxFragmentAtomicCounterBuffers;
 445       unsigned MaxCombinedAtomicCounterBuffers;
 446       unsigned MaxAtomicCounterBufferSize;
 447
 448       /* ARB_compute_shader */
 449       unsigned MaxComputeAtomicCounterBuffers;
 450       unsigned MaxComputeAtomicCounters;
 451       unsigned MaxComputeImageUniforms;
 452       unsigned MaxComputeTextureImageUnits;
 453       unsigned MaxComputeUniformComponents;
 454       unsigned MaxComputeWorkGroupCount[3];
 455       unsigned MaxComputeWorkGroupSize[3];
 456
 457       /* ARB_shader_image_load_store */
 458       unsigned MaxImageUnits;
 459       unsigned MaxCombinedShaderOutputResources;
 460       unsigned MaxImageSamples;
 461       unsigned MaxVertexImageUniforms;
 462       unsigned MaxTessControlImageUniforms;
 463       unsigned MaxTessEvaluationImageUniforms;
 464       unsigned MaxGeometryImageUniforms;
 465       unsigned MaxFragmentImageUniforms;
 466       unsigned MaxCombinedImageUniforms;
 467
 468       /* ARB_viewport_array */
 469       unsigned MaxViewports;
 470
 471       /* ARB_tessellation_shader */
 472       unsigned MaxPatchVertices;
 473       unsigned MaxTessGenLevel;
 474       unsigned MaxTessControlInputComponents;
 475       unsigned MaxTessControlOutputComponents;
 476       unsigned MaxTessControlTextureImageUnits;
 477       unsigned MaxTessEvaluationInputComponents;
 478       unsigned MaxTessEvaluationOutputComponents;
 479       unsigned MaxTessEvaluationTextureImageUnits;
 480       unsigned MaxTessPatchComponents;
 481       unsigned MaxTessControlTotalOutputComponents;
 482       unsigned MaxTessControlUniformComponents;
 483       unsigned MaxTessEvaluationUniformComponents;
 484
 485       /* GL 4.5 / OES_sample_variables */
 486       unsigned MaxSamples;
 487    } Const;
 488
 489    /**
 490     * During AST to IR conversion, pointer to current IR function
 491     *
 492     * Will be \c NULL whenever the AST to IR conversion is not inside a
 493     * function definition.
 494     */
 495    class ir_function_signature *current_function;
 496
 497    /**
 498     * During AST to IR conversion, pointer to the toplevel IR
 499     * instruction list being generated.
 500     */
 501    exec_list *toplevel_ir;
 502
 503    /** Have we found a return statement in this function? */
 504    bool found_return;
 505
 506    /** Was there an error during compilation? */
 507    bool error;
 508
 509    /**
 510     * Are all shader inputs / outputs invariant?
 511     *
 512     * This is set when the 'STDGL invariant(all)' pragma is used.
 513     */
 514    bool all_invariant;
 515
 516    /** Loop or switch statement containing the current instructions. */
 517    class ast_iteration_statement *loop_nesting_ast;
 518
 519    struct glsl_switch_state switch_state;
 520
 521    /** List of structures defined in user code. */
 522    const glsl_type **user_structures;
 523    unsigned num_user_structures;
 524
 525    char *info_log;
 526
 527    /**
 528     * \name Enable bits for GLSL extensions
 529     */
 530    /*@{*/
 531    /* ARB extensions go here, sorted alphabetically.
 532     */
 533    bool ARB_ES3_1_compatibility_enable;
 534    bool ARB_ES3_1_compatibility_warn;
 535    bool ARB_ES3_2_compatibility_enable;
 536    bool ARB_ES3_2_compatibility_warn;
 537    bool ARB_arrays_of_arrays_enable;
 538    bool ARB_arrays_of_arrays_warn;
 539    bool ARB_compute_shader_enable;
 540    bool ARB_compute_shader_warn;
 541    bool ARB_conservative_depth_enable;
 542    bool ARB_conservative_depth_warn;
 543    bool ARB_cull_distance_enable;
 544    bool ARB_cull_distance_warn;
 545    bool ARB_derivative_control_enable;
 546    bool ARB_derivative_control_warn;
 547    bool ARB_draw_buffers_enable;
 548    bool ARB_draw_buffers_warn;
 549    bool ARB_draw_instanced_enable;
 550    bool ARB_draw_instanced_warn;
 551    bool ARB_enhanced_layouts_enable;
 552    bool ARB_enhanced_layouts_warn;
 553    bool ARB_explicit_attrib_location_enable;
 554    bool ARB_explicit_attrib_location_warn;
 555    bool ARB_explicit_uniform_location_enable;
 556    bool ARB_explicit_uniform_location_warn;
 557    bool ARB_fragment_coord_conventions_enable;
 558    bool ARB_fragment_coord_conventions_warn;
 559    bool ARB_fragment_layer_viewport_enable;
 560    bool ARB_fragment_layer_viewport_warn;
 561    bool ARB_gpu_shader5_enable;
 562    bool ARB_gpu_shader5_warn;
 563    bool ARB_gpu_shader_fp64_enable;
 564    bool ARB_gpu_shader_fp64_warn;
 565    bool ARB_sample_shading_enable;
 566    bool ARB_sample_shading_warn;
 567    bool ARB_separate_shader_objects_enable;
 568    bool ARB_separate_shader_objects_warn;
 569    bool ARB_shader_atomic_counter_ops_enable;
 570    bool ARB_shader_atomic_counter_ops_warn;
 571    bool ARB_shader_atomic_counters_enable;
 572    bool ARB_shader_atomic_counters_warn;
 573    bool ARB_shader_bit_encoding_enable;
 574    bool ARB_shader_bit_encoding_warn;
 575    bool ARB_shader_clock_enable;
 576    bool ARB_shader_clock_warn;
 577    bool ARB_shader_draw_parameters_enable;
 578    bool ARB_shader_draw_parameters_warn;
 579    bool ARB_shader_group_vote_enable;
 580    bool ARB_shader_group_vote_warn;
 581    bool ARB_shader_image_load_store_enable;
 582    bool ARB_shader_image_load_store_warn;
 583    bool ARB_shader_image_size_enable;
 584    bool ARB_shader_image_size_warn;
 585    bool ARB_shader_precision_enable;
 586    bool ARB_shader_precision_warn;
 587    bool ARB_shader_stencil_export_enable;
 588    bool ARB_shader_stencil_export_warn;
 589    bool ARB_shader_storage_buffer_object_enable;
 590    bool ARB_shader_storage_buffer_object_warn;
 591    bool ARB_shader_subroutine_enable;
 592    bool ARB_shader_subroutine_warn;
 593    bool ARB_shader_texture_image_samples_enable;
 594    bool ARB_shader_texture_image_samples_warn;
 595    bool ARB_shader_texture_lod_enable;
 596    bool ARB_shader_texture_lod_warn;
 597    bool ARB_shading_language_420pack_enable;
 598    bool ARB_shading_language_420pack_warn;
 599    bool ARB_shading_language_packing_enable;
 600    bool ARB_shading_language_packing_warn;
 601    bool ARB_tessellation_shader_enable;
 602    bool ARB_tessellation_shader_warn;
 603    bool ARB_texture_cube_map_array_enable;
 604    bool ARB_texture_cube_map_array_warn;
 605    bool ARB_texture_gather_enable;
 606    bool ARB_texture_gather_warn;
 607    bool ARB_texture_multisample_enable;
 608    bool ARB_texture_multisample_warn;
 609    bool ARB_texture_query_levels_enable;
 610    bool ARB_texture_query_levels_warn;
 611    bool ARB_texture_query_lod_enable;
 612    bool ARB_texture_query_lod_warn;
 613    bool ARB_texture_rectangle_enable;
 614    bool ARB_texture_rectangle_warn;
 615    bool ARB_uniform_buffer_object_enable;
 616    bool ARB_uniform_buffer_object_warn;
 617    bool ARB_vertex_attrib_64bit_enable;
 618    bool ARB_vertex_attrib_64bit_warn;
 619    bool ARB_viewport_array_enable;
 620    bool ARB_viewport_array_warn;
 621
 622    /* KHR extensions go here, sorted alphabetically.
 623     */
 624
 625    /* OES extensions go here, sorted alphabetically.
 626     */
 627    bool OES_EGL_image_external_enable;
 628    bool OES_EGL_image_external_warn;
 629    bool OES_geometry_point_size_enable;
 630    bool OES_geometry_point_size_warn;
 631    bool OES_geometry_shader_enable;
 632    bool OES_geometry_shader_warn;
 633    bool OES_gpu_shader5_enable;
 634    bool OES_gpu_shader5_warn;
 635    bool OES_sample_variables_enable;
 636    bool OES_sample_variables_warn;
 637    bool OES_shader_image_atomic_enable;
 638    bool OES_shader_image_atomic_warn;
 639    bool OES_shader_io_blocks_enable;
 640    bool OES_shader_io_blocks_warn;
 641    bool OES_shader_multisample_interpolation_enable;
 642    bool OES_shader_multisample_interpolation_warn;
 643    bool OES_standard_derivatives_enable;
 644    bool OES_standard_derivatives_warn;
 645    bool OES_texture_3D_enable;
 646    bool OES_texture_3D_warn;
 647    bool OES_texture_buffer_enable;
 648    bool OES_texture_buffer_warn;
 649    bool OES_texture_storage_multisample_2d_array_enable;
 650    bool OES_texture_storage_multisample_2d_array_warn;
 651
 652    /* All other extensions go here, sorted alphabetically.
 653     */
 654    bool AMD_conservative_depth_enable;
 655    bool AMD_conservative_depth_warn;
 656    bool AMD_shader_stencil_export_enable;
 657    bool AMD_shader_stencil_export_warn;
 658    bool AMD_shader_trinary_minmax_enable;
 659    bool AMD_shader_trinary_minmax_warn;
 660    bool AMD_vertex_shader_layer_enable;
 661    bool AMD_vertex_shader_layer_warn;
 662    bool AMD_vertex_shader_viewport_index_enable;
 663    bool AMD_vertex_shader_viewport_index_warn;
 664    bool EXT_blend_func_extended_enable;
 665    bool EXT_blend_func_extended_warn;
 666    bool EXT_clip_cull_distance_enable;
 667    bool EXT_clip_cull_distance_warn;
 668    bool EXT_draw_buffers_enable;
 669    bool EXT_draw_buffers_warn;
 670    bool EXT_gpu_shader5_enable;
 671    bool EXT_gpu_shader5_warn;
 672    bool EXT_separate_shader_objects_enable;
 673    bool EXT_separate_shader_objects_warn;
 674    bool EXT_shader_integer_mix_enable;
 675    bool EXT_shader_integer_mix_warn;
 676    bool EXT_shader_io_blocks_enable;
 677    bool EXT_shader_io_blocks_warn;
 678    bool EXT_shader_samples_identical_enable;
 679    bool EXT_shader_samples_identical_warn;
 680    bool EXT_texture_array_enable;
 681    bool EXT_texture_array_warn;
 682    bool EXT_texture_buffer_enable;
 683    bool EXT_texture_buffer_warn;
 684    /*@}*/
 685
 686    /** Extensions supported by the OpenGL implementation. */
 687    const struct gl_extensions *extensions;
 688
 689    bool uses_builtin_functions;
 690    bool fs_uses_gl_fragcoord;
 691
 692    /**
 693     * For geometry shaders, size of the most recently seen input declaration
 694     * that was a sized array, or 0 if no sized input array declarations have
 695     * been seen.
 696     *
 697     * Unused for other shader types.
 698     */
 699    unsigned gs_input_size;
 700
 701    bool fs_early_fragment_tests;
 702
 703    /**
 704     * For tessellation control shaders, size of the most recently seen output
 705     * declaration that was a sized array, or 0 if no sized output array
 706     * declarations have been seen.
 707     *
 708     * Unused for other shader types.
 709     */
 710    unsigned tcs_output_size;
 711
 712    /** Atomic counter offsets by binding */
 713    unsigned atomic_counter_offsets[MAX_COMBINED_ATOMIC_BUFFERS];
 714
 715    bool allow_extension_directive_midshader;
 716
 717    /**
 718     * Known subroutine type declarations.
 719     */
 720    int num_subroutine_types;
 721    ir_function **subroutine_types;
 722
 723    /**
 724     * Functions that are associated with
 725     * subroutine types.
 726     */
 727    int num_subroutines;
 728    ir_function **subroutines;
 729
 730    /**
 731     * field selection temporary parser storage -
 732     * did the parser just parse a dot.
 733     */
 734    bool is_field;
 735
 736    /**
 737     * seen values for clip/cull distance sizes
 738     * so we can check totals aren't too large.
 739     */
 740    unsigned clip_dist_size, cull_dist_size;
 741 };
 742
 743 # define YYLLOC_DEFAULT(Current, Rhs, N)                        \
 744 do {                                                            \
 745    if (N)                                                       \
 746    {                                                            \
 747       (Current).first_line   = YYRHSLOC(Rhs, 1).first_line;     \
 748       (Current).first_column = YYRHSLOC(Rhs, 1).first_column;   \
 749       (Current).last_line    = YYRHSLOC(Rhs, N).last_line;      \
 750       (Current).last_column  = YYRHSLOC(Rhs, N).last_column;    \
 751    }                                                            \
 752    else                                                         \
 753    {                                                            \
 754       (Current).first_line   = (Current).last_line =            \
 755          YYRHSLOC(Rhs, 0).last_line;                            \
 756       (Current).first_column = (Current).last_column =          \
 757          YYRHSLOC(Rhs, 0).last_column;                          \
 758    }                                                            \
 759    (Current).source = 0;                                        \
 760 } while (0)
 761
 762 /**
 763  * Emit a warning to the shader log
 764  *
 765  * \sa _mesa_glsl_error
 766  */
 767 extern void _mesa_glsl_warning(const YYLTYPE *locp,
 768                                _mesa_glsl_parse_state *state,
 769                                const char *fmt, ...);
 770
 771 extern void _mesa_glsl_lexer_ctor(struct _mesa_glsl_parse_state *state,
 772                                   const char *string);
 773
 774 extern void _mesa_glsl_lexer_dtor(struct _mesa_glsl_parse_state *state);
 775
 776 union YYSTYPE;
 777 extern int _mesa_glsl_lexer_lex(union YYSTYPE *yylval, YYLTYPE *yylloc,
 778                                 void *scanner);
 779
 780 extern int _mesa_glsl_parse(struct _mesa_glsl_parse_state *);
 781
 782 /**
 783  * Process elements of the #extension directive
 784  *
 785  * \return
 786  * If \c name and \c behavior are valid, \c true is returned.  Otherwise
 787  * \c false is returned.
 788  */
 789 extern bool _mesa_glsl_process_extension(const char *name, YYLTYPE *name_locp,
 790                                          const char *behavior,
 791                                          YYLTYPE *behavior_locp,
 792                                          _mesa_glsl_parse_state *state);
 793
 794 #endif /* __cplusplus */
 795
 796
 797 /*
 798  * These definitions apply to C and C++
 799  */
 800 #ifdef __cplusplus
 801 extern "C" {
 802 #endif
 803
 804 extern int glcpp_preprocess(void *ctx, const char **shader, char **info_log,
 805                       const struct gl_extensions *extensions, struct gl_context *gl_ctx);
 806
 807 extern void _mesa_destroy_shader_compiler(void);
 808 extern void _mesa_destroy_shader_compiler_caches(void);
 809
 810 #ifdef __cplusplus
 811 }
 812 #endif
 813
 814
 815 #endif /* GLSL_PARSER_EXTRAS_H */