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              EXT_geometry_shader_enable ||
 281              OES_tessellation_shader_enable ||
 282              EXT_tessellation_shader_enable ||
 283
 284              is_version(150, 320);
 285    }
 286
 287    bool has_geometry_shader() const
 288    {
 289       return OES_geometry_shader_enable || EXT_geometry_shader_enable ||
 290              is_version(150, 320);
 291    }
 292
 293    bool has_tessellation_shader() const
 294    {
 295       return ARB_tessellation_shader_enable ||
 296              OES_tessellation_shader_enable ||
 297              EXT_tessellation_shader_enable ||
 298              is_version(400, 320);
 299    }
 300
 301    bool has_clip_distance() const
 302    {
 303       return EXT_clip_cull_distance_enable || is_version(130, 0);
 304    }
 305
 306    bool has_cull_distance() const
 307    {
 308       return EXT_clip_cull_distance_enable ||
 309              ARB_cull_distance_enable ||
 310              is_version(450, 0);
 311    }
 312
 313    bool has_framebuffer_fetch() const
 314    {
 315       return EXT_shader_framebuffer_fetch_enable ||
 316              MESA_shader_framebuffer_fetch_enable ||
 317              MESA_shader_framebuffer_fetch_non_coherent_enable;
 318    }
 319
 320    bool has_texture_cube_map_array() const
 321    {
 322       return ARB_texture_cube_map_array_enable ||
 323              OES_texture_cube_map_array_enable ||
 324              is_version(400, 320);
 325    }
 326
 327    void process_version_directive(YYLTYPE *locp, int version,
 328                                   const char *ident);
 329
 330    struct gl_context *const ctx;
 331    void *scanner;
 332    exec_list translation_unit;
 333    glsl_symbol_table *symbols;
 334
 335    unsigned num_supported_versions;
 336    struct {
 337       unsigned ver;
 338       uint8_t gl_ver;
 339       bool es;
 340    } supported_versions[16];
 341
 342    bool es_shader;
 343    unsigned language_version;
 344    unsigned forced_language_version;
 345    bool zero_init;
 346    unsigned gl_version;
 347    gl_shader_stage stage;
 348
 349    /**
 350     * Default uniform layout qualifiers tracked during parsing.
 351     * Currently affects uniform blocks and uniform buffer variables in
 352     * those blocks.
 353     */
 354    struct ast_type_qualifier *default_uniform_qualifier;
 355
 356    /**
 357     * Default shader storage layout qualifiers tracked during parsing.
 358     * Currently affects shader storage blocks and shader storage buffer
 359     * variables in those blocks.
 360     */
 361    struct ast_type_qualifier *default_shader_storage_qualifier;
 362
 363    /**
 364     * Variables to track different cases if a fragment shader redeclares
 365     * built-in variable gl_FragCoord.
 366     *
 367     * Note: These values are computed at ast_to_hir time rather than at parse
 368     * time.
 369     */
 370    bool fs_redeclares_gl_fragcoord;
 371    bool fs_origin_upper_left;
 372    bool fs_pixel_center_integer;
 373    bool fs_redeclares_gl_fragcoord_with_no_layout_qualifiers;
 374
 375    /**
 376     * True if a geometry shader input primitive type or tessellation control
 377     * output vertices were specified using a layout directive.
 378     *
 379     * Note: these values are computed at ast_to_hir time rather than at parse
 380     * time.
 381     */
 382    bool gs_input_prim_type_specified;
 383    bool tcs_output_vertices_specified;
 384
 385    /**
 386     * Input layout qualifiers from GLSL 1.50 (geometry shader controls),
 387     * and GLSL 4.00 (tessellation evaluation shader)
 388     */
 389    struct ast_type_qualifier *in_qualifier;
 390
 391    /**
 392     * True if a compute shader input local size was specified using a layout
 393     * directive.
 394     *
 395     * Note: this value is computed at ast_to_hir time rather than at parse
 396     * time.
 397     */
 398    bool cs_input_local_size_specified;
 399
 400    /**
 401     * If cs_input_local_size_specified is true, the local size that was
 402     * specified.  Otherwise ignored.
 403     */
 404    unsigned cs_input_local_size[3];
 405
 406    /**
 407     * Output layout qualifiers from GLSL 1.50 (geometry shader controls),
 408     * and GLSL 4.00 (tessellation control shader).
 409     */
 410    struct ast_type_qualifier *out_qualifier;
 411
 412    /**
 413     * Printable list of GLSL versions supported by the current context
 414     *
 415     * \note
 416     * This string should probably be generated per-context instead of per
 417     * invokation of the compiler.  This should be changed when the method of
 418     * tracking supported GLSL versions changes.
 419     */
 420    const char *supported_version_string;
 421
 422    /**
 423     * Implementation defined limits that affect built-in variables, etc.
 424     *
 425     * \sa struct gl_constants (in mtypes.h)
 426     */
 427    struct {
 428       /* 1.10 */
 429       unsigned MaxLights;
 430       unsigned MaxClipPlanes;
 431       unsigned MaxTextureUnits;
 432       unsigned MaxTextureCoords;
 433       unsigned MaxVertexAttribs;
 434       unsigned MaxVertexUniformComponents;
 435       unsigned MaxVertexTextureImageUnits;
 436       unsigned MaxCombinedTextureImageUnits;
 437       unsigned MaxTextureImageUnits;
 438       unsigned MaxFragmentUniformComponents;
 439
 440       /* ARB_draw_buffers */
 441       unsigned MaxDrawBuffers;
 442
 443       /* ARB_enhanced_layouts */
 444       unsigned MaxTransformFeedbackBuffers;
 445       unsigned MaxTransformFeedbackInterleavedComponents;
 446
 447       /* ARB_blend_func_extended */
 448       unsigned MaxDualSourceDrawBuffers;
 449
 450       /* 3.00 ES */
 451       int MinProgramTexelOffset;
 452       int MaxProgramTexelOffset;
 453
 454       /* 1.50 */
 455       unsigned MaxVertexOutputComponents;
 456       unsigned MaxGeometryInputComponents;
 457       unsigned MaxGeometryOutputComponents;
 458       unsigned MaxFragmentInputComponents;
 459       unsigned MaxGeometryTextureImageUnits;
 460       unsigned MaxGeometryOutputVertices;
 461       unsigned MaxGeometryTotalOutputComponents;
 462       unsigned MaxGeometryUniformComponents;
 463
 464       /* ARB_shader_atomic_counters */
 465       unsigned MaxVertexAtomicCounters;
 466       unsigned MaxTessControlAtomicCounters;
 467       unsigned MaxTessEvaluationAtomicCounters;
 468       unsigned MaxGeometryAtomicCounters;
 469       unsigned MaxFragmentAtomicCounters;
 470       unsigned MaxCombinedAtomicCounters;
 471       unsigned MaxAtomicBufferBindings;
 472
 473       /* These are also atomic counter related, but they weren't added to
 474        * until atomic counters were added to core in GLSL 4.20 and GLSL ES
 475        * 3.10.
 476        */
 477       unsigned MaxVertexAtomicCounterBuffers;
 478       unsigned MaxTessControlAtomicCounterBuffers;
 479       unsigned MaxTessEvaluationAtomicCounterBuffers;
 480       unsigned MaxGeometryAtomicCounterBuffers;
 481       unsigned MaxFragmentAtomicCounterBuffers;
 482       unsigned MaxCombinedAtomicCounterBuffers;
 483       unsigned MaxAtomicCounterBufferSize;
 484
 485       /* ARB_compute_shader */
 486       unsigned MaxComputeAtomicCounterBuffers;
 487       unsigned MaxComputeAtomicCounters;
 488       unsigned MaxComputeImageUniforms;
 489       unsigned MaxComputeTextureImageUnits;
 490       unsigned MaxComputeUniformComponents;
 491       unsigned MaxComputeWorkGroupCount[3];
 492       unsigned MaxComputeWorkGroupSize[3];
 493
 494       /* ARB_shader_image_load_store */
 495       unsigned MaxImageUnits;
 496       unsigned MaxCombinedShaderOutputResources;
 497       unsigned MaxImageSamples;
 498       unsigned MaxVertexImageUniforms;
 499       unsigned MaxTessControlImageUniforms;
 500       unsigned MaxTessEvaluationImageUniforms;
 501       unsigned MaxGeometryImageUniforms;
 502       unsigned MaxFragmentImageUniforms;
 503       unsigned MaxCombinedImageUniforms;
 504
 505       /* ARB_viewport_array */
 506       unsigned MaxViewports;
 507
 508       /* ARB_tessellation_shader */
 509       unsigned MaxPatchVertices;
 510       unsigned MaxTessGenLevel;
 511       unsigned MaxTessControlInputComponents;
 512       unsigned MaxTessControlOutputComponents;
 513       unsigned MaxTessControlTextureImageUnits;
 514       unsigned MaxTessEvaluationInputComponents;
 515       unsigned MaxTessEvaluationOutputComponents;
 516       unsigned MaxTessEvaluationTextureImageUnits;
 517       unsigned MaxTessPatchComponents;
 518       unsigned MaxTessControlTotalOutputComponents;
 519       unsigned MaxTessControlUniformComponents;
 520       unsigned MaxTessEvaluationUniformComponents;
 521
 522       /* GL 4.5 / OES_sample_variables */
 523       unsigned MaxSamples;
 524    } Const;
 525
 526    /**
 527     * During AST to IR conversion, pointer to current IR function
 528     *
 529     * Will be \c NULL whenever the AST to IR conversion is not inside a
 530     * function definition.
 531     */
 532    class ir_function_signature *current_function;
 533
 534    /**
 535     * During AST to IR conversion, pointer to the toplevel IR
 536     * instruction list being generated.
 537     */
 538    exec_list *toplevel_ir;
 539
 540    /** Have we found a return statement in this function? */
 541    bool found_return;
 542
 543    /** Was there an error during compilation? */
 544    bool error;
 545
 546    /**
 547     * Are all shader inputs / outputs invariant?
 548     *
 549     * This is set when the 'STDGL invariant(all)' pragma is used.
 550     */
 551    bool all_invariant;
 552
 553    /** Loop or switch statement containing the current instructions. */
 554    class ast_iteration_statement *loop_nesting_ast;
 555
 556    struct glsl_switch_state switch_state;
 557
 558    /** List of structures defined in user code. */
 559    const glsl_type **user_structures;
 560    unsigned num_user_structures;
 561
 562    char *info_log;
 563
 564    /**
 565     * \name Enable bits for GLSL extensions
 566     */
 567    /*@{*/
 568    /* ARB extensions go here, sorted alphabetically.
 569     */
 570    bool ARB_ES3_1_compatibility_enable;
 571    bool ARB_ES3_1_compatibility_warn;
 572    bool ARB_ES3_2_compatibility_enable;
 573    bool ARB_ES3_2_compatibility_warn;
 574    bool ARB_arrays_of_arrays_enable;
 575    bool ARB_arrays_of_arrays_warn;
 576    bool ARB_compute_shader_enable;
 577    bool ARB_compute_shader_warn;
 578    bool ARB_conservative_depth_enable;
 579    bool ARB_conservative_depth_warn;
 580    bool ARB_cull_distance_enable;
 581    bool ARB_cull_distance_warn;
 582    bool ARB_derivative_control_enable;
 583    bool ARB_derivative_control_warn;
 584    bool ARB_draw_buffers_enable;
 585    bool ARB_draw_buffers_warn;
 586    bool ARB_draw_instanced_enable;
 587    bool ARB_draw_instanced_warn;
 588    bool ARB_enhanced_layouts_enable;
 589    bool ARB_enhanced_layouts_warn;
 590    bool ARB_explicit_attrib_location_enable;
 591    bool ARB_explicit_attrib_location_warn;
 592    bool ARB_explicit_uniform_location_enable;
 593    bool ARB_explicit_uniform_location_warn;
 594    bool ARB_fragment_coord_conventions_enable;
 595    bool ARB_fragment_coord_conventions_warn;
 596    bool ARB_fragment_layer_viewport_enable;
 597    bool ARB_fragment_layer_viewport_warn;
 598    bool ARB_gpu_shader5_enable;
 599    bool ARB_gpu_shader5_warn;
 600    bool ARB_gpu_shader_fp64_enable;
 601    bool ARB_gpu_shader_fp64_warn;
 602    bool ARB_sample_shading_enable;
 603    bool ARB_sample_shading_warn;
 604    bool ARB_separate_shader_objects_enable;
 605    bool ARB_separate_shader_objects_warn;
 606    bool ARB_shader_atomic_counter_ops_enable;
 607    bool ARB_shader_atomic_counter_ops_warn;
 608    bool ARB_shader_atomic_counters_enable;
 609    bool ARB_shader_atomic_counters_warn;
 610    bool ARB_shader_bit_encoding_enable;
 611    bool ARB_shader_bit_encoding_warn;
 612    bool ARB_shader_clock_enable;
 613    bool ARB_shader_clock_warn;
 614    bool ARB_shader_draw_parameters_enable;
 615    bool ARB_shader_draw_parameters_warn;
 616    bool ARB_shader_group_vote_enable;
 617    bool ARB_shader_group_vote_warn;
 618    bool ARB_shader_image_load_store_enable;
 619    bool ARB_shader_image_load_store_warn;
 620    bool ARB_shader_image_size_enable;
 621    bool ARB_shader_image_size_warn;
 622    bool ARB_shader_precision_enable;
 623    bool ARB_shader_precision_warn;
 624    bool ARB_shader_stencil_export_enable;
 625    bool ARB_shader_stencil_export_warn;
 626    bool ARB_shader_storage_buffer_object_enable;
 627    bool ARB_shader_storage_buffer_object_warn;
 628    bool ARB_shader_subroutine_enable;
 629    bool ARB_shader_subroutine_warn;
 630    bool ARB_shader_texture_image_samples_enable;
 631    bool ARB_shader_texture_image_samples_warn;
 632    bool ARB_shader_texture_lod_enable;
 633    bool ARB_shader_texture_lod_warn;
 634    bool ARB_shading_language_420pack_enable;
 635    bool ARB_shading_language_420pack_warn;
 636    bool ARB_shading_language_packing_enable;
 637    bool ARB_shading_language_packing_warn;
 638    bool ARB_tessellation_shader_enable;
 639    bool ARB_tessellation_shader_warn;
 640    bool ARB_texture_cube_map_array_enable;
 641    bool ARB_texture_cube_map_array_warn;
 642    bool ARB_texture_gather_enable;
 643    bool ARB_texture_gather_warn;
 644    bool ARB_texture_multisample_enable;
 645    bool ARB_texture_multisample_warn;
 646    bool ARB_texture_query_levels_enable;
 647    bool ARB_texture_query_levels_warn;
 648    bool ARB_texture_query_lod_enable;
 649    bool ARB_texture_query_lod_warn;
 650    bool ARB_texture_rectangle_enable;
 651    bool ARB_texture_rectangle_warn;
 652    bool ARB_uniform_buffer_object_enable;
 653    bool ARB_uniform_buffer_object_warn;
 654    bool ARB_vertex_attrib_64bit_enable;
 655    bool ARB_vertex_attrib_64bit_warn;
 656    bool ARB_viewport_array_enable;
 657    bool ARB_viewport_array_warn;
 658
 659    /* KHR extensions go here, sorted alphabetically.
 660     */
 661    bool KHR_blend_equation_advanced_enable;
 662    bool KHR_blend_equation_advanced_warn;
 663
 664    /* OES extensions go here, sorted alphabetically.
 665     */
 666    bool OES_EGL_image_external_enable;
 667    bool OES_EGL_image_external_warn;
 668    bool OES_geometry_point_size_enable;
 669    bool OES_geometry_point_size_warn;
 670    bool OES_geometry_shader_enable;
 671    bool OES_geometry_shader_warn;
 672    bool OES_gpu_shader5_enable;
 673    bool OES_gpu_shader5_warn;
 674    bool OES_sample_variables_enable;
 675    bool OES_sample_variables_warn;
 676    bool OES_shader_image_atomic_enable;
 677    bool OES_shader_image_atomic_warn;
 678    bool OES_shader_io_blocks_enable;
 679    bool OES_shader_io_blocks_warn;
 680    bool OES_shader_multisample_interpolation_enable;
 681    bool OES_shader_multisample_interpolation_warn;
 682    bool OES_standard_derivatives_enable;
 683    bool OES_standard_derivatives_warn;
 684    bool OES_tessellation_point_size_enable;
 685    bool OES_tessellation_point_size_warn;
 686    bool OES_tessellation_shader_enable;
 687    bool OES_tessellation_shader_warn;
 688    bool OES_texture_3D_enable;
 689    bool OES_texture_3D_warn;
 690    bool OES_texture_buffer_enable;
 691    bool OES_texture_buffer_warn;
 692    bool OES_texture_cube_map_array_enable;
 693    bool OES_texture_cube_map_array_warn;
 694    bool OES_texture_storage_multisample_2d_array_enable;
 695    bool OES_texture_storage_multisample_2d_array_warn;
 696
 697    /* All other extensions go here, sorted alphabetically.
 698     */
 699    bool AMD_conservative_depth_enable;
 700    bool AMD_conservative_depth_warn;
 701    bool AMD_shader_stencil_export_enable;
 702    bool AMD_shader_stencil_export_warn;
 703    bool AMD_shader_trinary_minmax_enable;
 704    bool AMD_shader_trinary_minmax_warn;
 705    bool AMD_vertex_shader_layer_enable;
 706    bool AMD_vertex_shader_layer_warn;
 707    bool AMD_vertex_shader_viewport_index_enable;
 708    bool AMD_vertex_shader_viewport_index_warn;
 709    bool EXT_blend_func_extended_enable;
 710    bool EXT_blend_func_extended_warn;
 711    bool EXT_clip_cull_distance_enable;
 712    bool EXT_clip_cull_distance_warn;
 713    bool EXT_draw_buffers_enable;
 714    bool EXT_draw_buffers_warn;
 715    bool EXT_geometry_point_size_enable;
 716    bool EXT_geometry_point_size_warn;
 717    bool EXT_geometry_shader_enable;
 718    bool EXT_geometry_shader_warn;
 719    bool EXT_gpu_shader5_enable;
 720    bool EXT_gpu_shader5_warn;
 721    bool EXT_separate_shader_objects_enable;
 722    bool EXT_separate_shader_objects_warn;
 723    bool EXT_shader_framebuffer_fetch_enable;
 724    bool EXT_shader_framebuffer_fetch_warn;
 725    bool EXT_shader_integer_mix_enable;
 726    bool EXT_shader_integer_mix_warn;
 727    bool EXT_shader_io_blocks_enable;
 728    bool EXT_shader_io_blocks_warn;
 729    bool EXT_shader_samples_identical_enable;
 730    bool EXT_shader_samples_identical_warn;
 731    bool EXT_tessellation_point_size_enable;
 732    bool EXT_tessellation_point_size_warn;
 733    bool EXT_tessellation_shader_enable;
 734    bool EXT_tessellation_shader_warn;
 735    bool EXT_texture_array_enable;
 736    bool EXT_texture_array_warn;
 737    bool EXT_texture_buffer_enable;
 738    bool EXT_texture_buffer_warn;
 739    bool MESA_shader_framebuffer_fetch_enable;
 740    bool MESA_shader_framebuffer_fetch_warn;
 741    bool MESA_shader_framebuffer_fetch_non_coherent_enable;
 742    bool MESA_shader_framebuffer_fetch_non_coherent_warn;
 743    bool MESA_shader_integer_functions_enable;
 744    bool MESA_shader_integer_functions_warn;
 745    /*@}*/
 746
 747    /** Extensions supported by the OpenGL implementation. */
 748    const struct gl_extensions *extensions;
 749
 750    bool uses_builtin_functions;
 751    bool fs_uses_gl_fragcoord;
 752
 753    /**
 754     * For geometry shaders, size of the most recently seen input declaration
 755     * that was a sized array, or 0 if no sized input array declarations have
 756     * been seen.
 757     *
 758     * Unused for other shader types.
 759     */
 760    unsigned gs_input_size;
 761
 762    bool fs_early_fragment_tests;
 763
 764    unsigned fs_blend_support;
 765
 766    /**
 767     * For tessellation control shaders, size of the most recently seen output
 768     * declaration that was a sized array, or 0 if no sized output array
 769     * declarations have been seen.
 770     *
 771     * Unused for other shader types.
 772     */
 773    unsigned tcs_output_size;
 774
 775    /** Atomic counter offsets by binding */
 776    unsigned atomic_counter_offsets[MAX_COMBINED_ATOMIC_BUFFERS];
 777
 778    bool allow_extension_directive_midshader;
 779
 780    /**
 781     * Known subroutine type declarations.
 782     */
 783    int num_subroutine_types;
 784    ir_function **subroutine_types;
 785
 786    /**
 787     * Functions that are associated with
 788     * subroutine types.
 789     */
 790    int num_subroutines;
 791    ir_function **subroutines;
 792
 793    /**
 794     * field selection temporary parser storage -
 795     * did the parser just parse a dot.
 796     */
 797    bool is_field;
 798
 799    /**
 800     * seen values for clip/cull distance sizes
 801     * so we can check totals aren't too large.
 802     */
 803    unsigned clip_dist_size, cull_dist_size;
 804 };
 805
 806 # define YYLLOC_DEFAULT(Current, Rhs, N)                        \
 807 do {                                                            \
 808    if (N)                                                       \
 809    {                                                            \
 810       (Current).first_line   = YYRHSLOC(Rhs, 1).first_line;     \
 811       (Current).first_column = YYRHSLOC(Rhs, 1).first_column;   \
 812       (Current).last_line    = YYRHSLOC(Rhs, N).last_line;      \
 813       (Current).last_column  = YYRHSLOC(Rhs, N).last_column;    \
 814    }                                                            \
 815    else                                                         \
 816    {                                                            \
 817       (Current).first_line   = (Current).last_line =            \
 818          YYRHSLOC(Rhs, 0).last_line;                            \
 819       (Current).first_column = (Current).last_column =          \
 820          YYRHSLOC(Rhs, 0).last_column;                          \
 821    }                                                            \
 822    (Current).source = 0;                                        \
 823 } while (0)
 824
 825 /**
 826  * Emit a warning to the shader log
 827  *
 828  * \sa _mesa_glsl_error
 829  */
 830 extern void _mesa_glsl_warning(const YYLTYPE *locp,
 831                                _mesa_glsl_parse_state *state,
 832                                const char *fmt, ...);
 833
 834 extern void _mesa_glsl_lexer_ctor(struct _mesa_glsl_parse_state *state,
 835                                   const char *string);
 836
 837 extern void _mesa_glsl_lexer_dtor(struct _mesa_glsl_parse_state *state);
 838
 839 union YYSTYPE;
 840 extern int _mesa_glsl_lexer_lex(union YYSTYPE *yylval, YYLTYPE *yylloc,
 841                                 void *scanner);
 842
 843 extern int _mesa_glsl_parse(struct _mesa_glsl_parse_state *);
 844
 845 /**
 846  * Process elements of the #extension directive
 847  *
 848  * \return
 849  * If \c name and \c behavior are valid, \c true is returned.  Otherwise
 850  * \c false is returned.
 851  */
 852 extern bool _mesa_glsl_process_extension(const char *name, YYLTYPE *name_locp,
 853                                          const char *behavior,
 854                                          YYLTYPE *behavior_locp,
 855                                          _mesa_glsl_parse_state *state);
 856
 857 #endif /* __cplusplus */
 858
 859
 860 /*
 861  * These definitions apply to C and C++
 862  */
 863 #ifdef __cplusplus
 864 extern "C" {
 865 #endif
 866
 867 struct glcpp_parser;
 868
 869 typedef void (*glcpp_extension_iterator)(
 870                 struct _mesa_glsl_parse_state *state,
 871                 void (*add_builtin_define)(struct glcpp_parser *, const char *, int),
 872                 struct glcpp_parser *data,
 873                 unsigned version,
 874                 bool es);
 875
 876 extern int glcpp_preprocess(void *ctx, const char **shader, char **info_log,
 877                             glcpp_extension_iterator extensions,
 878                             struct _mesa_glsl_parse_state *state,
 879                             struct gl_context *gl_ctx);
 880
 881 extern void _mesa_destroy_shader_compiler(void);
 882 extern void _mesa_destroy_shader_compiler_caches(void);
 883
 884 #ifdef __cplusplus
 885 }
 886 #endif
 887
 888
 889 #endif /* GLSL_PARSER_EXTRAS_H */