src/compiler/glsl/glsl_parser_extras.h

   1 /*
   2  * Copyright © 2010 Intel Corporation
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  21  * DEALINGS IN THE SOFTWARE.
  22  */
  23
  24 #ifndef GLSL_PARSER_EXTRAS_H
  25 #define GLSL_PARSER_EXTRAS_H
  26
  27 /*
  28  * Most of the definitions here only apply to C++
  29  */
  30 #ifdef __cplusplus
  31
  32
  33 #include <stdlib.h>
  34 #include "glsl_symbol_table.h"
  35
  36 /* THIS is a macro defined somewhere deep in the Windows MSVC header files.
  37  * Undefine it here to avoid collision with the lexer's THIS token.
  38  */
  39 #undef THIS
  40
  41 struct gl_context;
  42
  43 struct glsl_switch_state {
  44    /** Temporary variables needed for switch statement. */
  45    ir_variable *test_var;
  46    ir_variable *is_fallthru_var;
  47    class ast_switch_statement *switch_nesting_ast;
  48
  49    /** Used to detect if 'continue' was called inside a switch. */
  50    ir_variable *continue_inside;
  51
  52    /** Used to set condition if 'default' label should be chosen. */
  53    ir_variable *run_default;
  54
  55    /** Table of constant values already used in case labels */
  56    struct hash_table *labels_ht;
  57    class ast_case_label *previous_default;
  58
  59    bool is_switch_innermost; // if switch stmt is closest to break, ...
  60 };
  61
  62 const char *
  63 glsl_compute_version_string(void *mem_ctx, bool is_es, unsigned version);
  64
  65 typedef struct YYLTYPE {
  66    int first_line;
  67    int first_column;
  68    int last_line;
  69    int last_column;
  70    unsigned source;
  71 } YYLTYPE;
  72 # define YYLTYPE_IS_DECLARED 1
  73 # define YYLTYPE_IS_TRIVIAL 1
  74
  75 extern void _mesa_glsl_error(YYLTYPE *locp, _mesa_glsl_parse_state *state,
  76                              const char *fmt, ...);
  77
  78
  79 struct _mesa_glsl_parse_state {
  80    _mesa_glsl_parse_state(struct gl_context *_ctx, gl_shader_stage stage,
  81                           void *mem_ctx);
  82
  83    DECLARE_RZALLOC_CXX_OPERATORS(_mesa_glsl_parse_state);
  84
  85    /**
  86     * Generate a string representing the GLSL version currently being compiled
  87     * (useful for error messages).
  88     */
  89    const char *get_version_string()
  90    {
  91       return glsl_compute_version_string(this, this->es_shader,
  92                                          this->language_version);
  93    }
  94
  95    /**
  96     * Determine whether the current GLSL version is sufficiently high to
  97     * support a certain feature.
  98     *
  99     * \param required_glsl_version is the desktop GLSL version that is
 100     * required to support the feature, or 0 if no version of desktop GLSL
 101     * supports the feature.
 102     *
 103     * \param required_glsl_es_version is the GLSL ES version that is required
 104     * to support the feature, or 0 if no version of GLSL ES supports the
 105     * feature.
 106     */
 107    bool is_version(unsigned required_glsl_version,
 108                    unsigned required_glsl_es_version) const
 109    {
 110       unsigned required_version = this->es_shader ?
 111          required_glsl_es_version : required_glsl_version;
 112       unsigned this_version = this->forced_language_version
 113          ? this->forced_language_version : this->language_version;
 114       return required_version != 0
 115          && this_version >= required_version;
 116    }
 117
 118    bool check_version(unsigned required_glsl_version,
 119                       unsigned required_glsl_es_version,
 120                       YYLTYPE *locp, const char *fmt, ...) PRINTFLIKE(5, 6);
 121
 122    bool check_arrays_of_arrays_allowed(YYLTYPE *locp)
 123    {
 124       if (!(ARB_arrays_of_arrays_enable || is_version(430, 310))) {
 125          const char *const requirement = this->es_shader
 126             ? "GLSL ES 3.10"
 127             : "GL_ARB_arrays_of_arrays or GLSL 4.30";
 128          _mesa_glsl_error(locp, this,
 129                           "%s required for defining arrays of arrays.",
 130                           requirement);
 131          return false;
 132       }
 133       return true;
 134    }
 135
 136    bool check_precision_qualifiers_allowed(YYLTYPE *locp)
 137    {
 138       return check_version(130, 100, locp,
 139                            "precision qualifiers are forbidden");
 140    }
 141
 142    bool check_bitwise_operations_allowed(YYLTYPE *locp)
 143    {
 144       return EXT_gpu_shader4_enable ||
 145              check_version(130, 300, locp, "bit-wise operations are forbidden");
 146    }
 147
 148    bool check_explicit_attrib_stream_allowed(YYLTYPE *locp)
 149    {
 150       if (!this->has_explicit_attrib_stream()) {
 151          const char *const requirement = "GL_ARB_gpu_shader5 extension or GLSL 4.00";
 152
 153          _mesa_glsl_error(locp, this, "explicit stream requires %s",
 154                           requirement);
 155          return false;
 156       }
 157
 158       return true;
 159    }
 160
 161    bool check_explicit_attrib_location_allowed(YYLTYPE *locp,
 162                                                const ir_variable *var)
 163    {
 164       if (!this->has_explicit_attrib_location()) {
 165          const char *const requirement = this->es_shader
 166             ? "GLSL ES 3.00"
 167             : "GL_ARB_explicit_attrib_location extension or GLSL 3.30";
 168
 169          _mesa_glsl_error(locp, this, "%s explicit location requires %s",
 170                           mode_string(var), requirement);
 171          return false;
 172       }
 173
 174       return true;
 175    }
 176
 177    bool check_separate_shader_objects_allowed(YYLTYPE *locp,
 178                                               const ir_variable *var)
 179    {
 180       if (!this->has_separate_shader_objects()) {
 181          const char *const requirement = this->es_shader
 182             ? "GL_EXT_separate_shader_objects extension or GLSL ES 3.10"
 183             : "GL_ARB_separate_shader_objects extension or GLSL 4.20";
 184
 185          _mesa_glsl_error(locp, this, "%s explicit location requires %s",
 186                           mode_string(var), requirement);
 187          return false;
 188       }
 189
 190       return true;
 191    }
 192
 193    bool check_explicit_uniform_location_allowed(YYLTYPE *locp,
 194                                                 const ir_variable *)
 195    {
 196       if (!this->has_explicit_attrib_location() ||
 197           !this->has_explicit_uniform_location()) {
 198          const char *const requirement = this->es_shader
 199             ? "GLSL ES 3.10"
 200             : "GL_ARB_explicit_uniform_location and either "
 201               "GL_ARB_explicit_attrib_location or GLSL 3.30.";
 202
 203          _mesa_glsl_error(locp, this,
 204                           "uniform explicit location requires %s",
 205                           requirement);
 206          return false;
 207       }
 208
 209       return true;
 210    }
 211
 212    bool has_atomic_counters() const
 213    {
 214       return ARB_shader_atomic_counters_enable || is_version(420, 310);
 215    }
 216
 217    bool has_enhanced_layouts() const
 218    {
 219       return ARB_enhanced_layouts_enable || is_version(440, 0);
 220    }
 221
 222    bool has_explicit_attrib_stream() const
 223    {
 224       return ARB_gpu_shader5_enable || is_version(400, 0);
 225    }
 226
 227    bool has_explicit_attrib_location() const
 228    {
 229       return ARB_explicit_attrib_location_enable || is_version(330, 300);
 230    }
 231
 232    bool has_explicit_uniform_location() const
 233    {
 234       return ARB_explicit_uniform_location_enable || is_version(430, 310);
 235    }
 236
 237    bool has_uniform_buffer_objects() const
 238    {
 239       return ARB_uniform_buffer_object_enable || is_version(140, 300);
 240    }
 241
 242    bool has_shader_storage_buffer_objects() const
 243    {
 244       return ARB_shader_storage_buffer_object_enable || is_version(430, 310);
 245    }
 246
 247    bool has_separate_shader_objects() const
 248    {
 249       return ARB_separate_shader_objects_enable || is_version(410, 310)
 250          || EXT_separate_shader_objects_enable;
 251    }
 252
 253    bool has_double() const
 254    {
 255       return ARB_gpu_shader_fp64_enable || is_version(400, 0);
 256    }
 257
 258    bool has_int64() const
 259    {
 260       return ARB_gpu_shader_int64_enable ||
 261              AMD_gpu_shader_int64_enable;
 262    }
 263
 264    bool has_420pack() const
 265    {
 266       return ARB_shading_language_420pack_enable || is_version(420, 0);
 267    }
 268
 269    bool has_420pack_or_es31() const
 270    {
 271       return ARB_shading_language_420pack_enable || is_version(420, 310);
 272    }
 273
 274    bool has_compute_shader() const
 275    {
 276       return ARB_compute_shader_enable || is_version(430, 310);
 277    }
 278
 279    bool has_shader_io_blocks() const
 280    {
 281       /* The OES_geometry_shader_specification says:
 282        *
 283        *    "If the OES_geometry_shader extension is enabled, the
 284        *     OES_shader_io_blocks extension is also implicitly enabled."
 285        *
 286        * The OES_tessellation_shader extension has similar wording.
 287        */
 288       return OES_shader_io_blocks_enable ||
 289              EXT_shader_io_blocks_enable ||
 290              OES_geometry_shader_enable ||
 291              EXT_geometry_shader_enable ||
 292              OES_tessellation_shader_enable ||
 293              EXT_tessellation_shader_enable ||
 294
 295              is_version(150, 320);
 296    }
 297
 298    bool has_geometry_shader() const
 299    {
 300       return OES_geometry_shader_enable || EXT_geometry_shader_enable ||
 301              is_version(150, 320);
 302    }
 303
 304    bool has_tessellation_shader() const
 305    {
 306       return ARB_tessellation_shader_enable ||
 307              OES_tessellation_shader_enable ||
 308              EXT_tessellation_shader_enable ||
 309              is_version(400, 320);
 310    }
 311
 312    bool has_clip_distance() const
 313    {
 314       return EXT_clip_cull_distance_enable || is_version(130, 0);
 315    }
 316
 317    bool has_cull_distance() const
 318    {
 319       return EXT_clip_cull_distance_enable ||
 320              ARB_cull_distance_enable ||
 321              is_version(450, 0);
 322    }
 323
 324    bool has_framebuffer_fetch() const
 325    {
 326       return EXT_shader_framebuffer_fetch_enable ||
 327              EXT_shader_framebuffer_fetch_non_coherent_enable;
 328    }
 329
 330    bool has_texture_cube_map_array() const
 331    {
 332       return ARB_texture_cube_map_array_enable ||
 333              EXT_texture_cube_map_array_enable ||
 334              OES_texture_cube_map_array_enable ||
 335              is_version(400, 320);
 336    }
 337
 338    bool has_shader_image_load_store() const
 339    {
 340       return ARB_shader_image_load_store_enable ||
 341              EXT_shader_image_load_store_enable ||
 342              is_version(420, 310);
 343    }
 344
 345    bool has_bindless() const
 346    {
 347       return ARB_bindless_texture_enable;
 348    }
 349
 350    bool has_image_load_formatted() const
 351    {
 352       return EXT_shader_image_load_formatted_enable;
 353    }
 354
 355    bool has_implicit_conversions() const
 356    {
 357       return EXT_shader_implicit_conversions_enable || is_version(120, 0);
 358    }
 359
 360    bool has_implicit_uint_to_int_conversion() const
 361    {
 362       return ARB_gpu_shader5_enable ||
 363              MESA_shader_integer_functions_enable ||
 364              EXT_shader_implicit_conversions_enable ||
 365              is_version(400, 0);
 366    }
 367
 368    void process_version_directive(YYLTYPE *locp, int version,
 369                                   const char *ident);
 370
 371    struct gl_context *const ctx;
 372    void *scanner;
 373    exec_list translation_unit;
 374    glsl_symbol_table *symbols;
 375
 376    void *linalloc;
 377
 378    unsigned num_supported_versions;
 379    struct {
 380       unsigned ver;
 381       uint8_t gl_ver;
 382       bool es;
 383    } supported_versions[17];
 384
 385    bool es_shader;
 386    bool compat_shader;
 387    unsigned language_version;
 388    unsigned forced_language_version;
 389    bool zero_init;
 390    unsigned gl_version;
 391    gl_shader_stage stage;
 392
 393    /**
 394     * Default uniform layout qualifiers tracked during parsing.
 395     * Currently affects uniform blocks and uniform buffer variables in
 396     * those blocks.
 397     */
 398    struct ast_type_qualifier *default_uniform_qualifier;
 399
 400    /**
 401     * Default shader storage layout qualifiers tracked during parsing.
 402     * Currently affects shader storage blocks and shader storage buffer
 403     * variables in those blocks.
 404     */
 405    struct ast_type_qualifier *default_shader_storage_qualifier;
 406
 407    /**
 408     * Variables to track different cases if a fragment shader redeclares
 409     * built-in variable gl_FragCoord.
 410     *
 411     * Note: These values are computed at ast_to_hir time rather than at parse
 412     * time.
 413     */
 414    bool fs_redeclares_gl_fragcoord;
 415    bool fs_origin_upper_left;
 416    bool fs_pixel_center_integer;
 417    bool fs_redeclares_gl_fragcoord_with_no_layout_qualifiers;
 418
 419    /**
 420     * True if a geometry shader input primitive type or tessellation control
 421     * output vertices were specified using a layout directive.
 422     *
 423     * Note: these values are computed at ast_to_hir time rather than at parse
 424     * time.
 425     */
 426    bool gs_input_prim_type_specified;
 427    bool tcs_output_vertices_specified;
 428
 429    /**
 430     * Input layout qualifiers from GLSL 1.50 (geometry shader controls),
 431     * and GLSL 4.00 (tessellation evaluation shader)
 432     */
 433    struct ast_type_qualifier *in_qualifier;
 434
 435    /**
 436     * True if a compute shader input local size was specified using a layout
 437     * directive.
 438     *
 439     * Note: this value is computed at ast_to_hir time rather than at parse
 440     * time.
 441     */
 442    bool cs_input_local_size_specified;
 443
 444    /**
 445     * If cs_input_local_size_specified is true, the local size that was
 446     * specified.  Otherwise ignored.
 447     */
 448    unsigned cs_input_local_size[3];
 449
 450    /**
 451     * True if a compute shader input local variable size was specified using
 452     * a layout directive as specified by ARB_compute_variable_group_size.
 453     */
 454    bool cs_input_local_size_variable_specified;
 455
 456    /**
 457     * Arrangement of invocations used to calculate derivatives in a compute
 458     * shader.  From NV_compute_shader_derivatives.
 459     */
 460    enum gl_derivative_group cs_derivative_group;
 461
 462    /**
 463     * True if a shader declare bindless_sampler/bindless_image, and
 464     * respectively bound_sampler/bound_image at global scope as specified by
 465     * ARB_bindless_texture.
 466     */
 467    bool bindless_sampler_specified;
 468    bool bindless_image_specified;
 469    bool bound_sampler_specified;
 470    bool bound_image_specified;
 471
 472    /**
 473     * Output layout qualifiers from GLSL 1.50 (geometry shader controls),
 474     * and GLSL 4.00 (tessellation control shader).
 475     */
 476    struct ast_type_qualifier *out_qualifier;
 477
 478    /**
 479     * Printable list of GLSL versions supported by the current context
 480     *
 481     * \note
 482     * This string should probably be generated per-context instead of per
 483     * invokation of the compiler.  This should be changed when the method of
 484     * tracking supported GLSL versions changes.
 485     */
 486    const char *supported_version_string;
 487
 488    /**
 489     * Implementation defined limits that affect built-in variables, etc.
 490     *
 491     * \sa struct gl_constants (in mtypes.h)
 492     */
 493    struct {
 494       /* 1.10 */
 495       unsigned MaxLights;
 496       unsigned MaxClipPlanes;
 497       unsigned MaxTextureUnits;
 498       unsigned MaxTextureCoords;
 499       unsigned MaxVertexAttribs;
 500       unsigned MaxVertexUniformComponents;
 501       unsigned MaxVertexTextureImageUnits;
 502       unsigned MaxCombinedTextureImageUnits;
 503       unsigned MaxTextureImageUnits;
 504       unsigned MaxFragmentUniformComponents;
 505
 506       /* ARB_draw_buffers */
 507       unsigned MaxDrawBuffers;
 508
 509       /* ARB_enhanced_layouts */
 510       unsigned MaxTransformFeedbackBuffers;
 511       unsigned MaxTransformFeedbackInterleavedComponents;
 512
 513       /* ARB_blend_func_extended */
 514       unsigned MaxDualSourceDrawBuffers;
 515
 516       /* 3.00 ES */
 517       int MinProgramTexelOffset;
 518       int MaxProgramTexelOffset;
 519
 520       /* 1.50 */
 521       unsigned MaxVertexOutputComponents;
 522       unsigned MaxGeometryInputComponents;
 523       unsigned MaxGeometryOutputComponents;
 524       unsigned MaxGeometryShaderInvocations;
 525       unsigned MaxFragmentInputComponents;
 526       unsigned MaxGeometryTextureImageUnits;
 527       unsigned MaxGeometryOutputVertices;
 528       unsigned MaxGeometryTotalOutputComponents;
 529       unsigned MaxGeometryUniformComponents;
 530
 531       /* ARB_shader_atomic_counters */
 532       unsigned MaxVertexAtomicCounters;
 533       unsigned MaxTessControlAtomicCounters;
 534       unsigned MaxTessEvaluationAtomicCounters;
 535       unsigned MaxGeometryAtomicCounters;
 536       unsigned MaxFragmentAtomicCounters;
 537       unsigned MaxCombinedAtomicCounters;
 538       unsigned MaxAtomicBufferBindings;
 539
 540       /* These are also atomic counter related, but they weren't added to
 541        * until atomic counters were added to core in GLSL 4.20 and GLSL ES
 542        * 3.10.
 543        */
 544       unsigned MaxVertexAtomicCounterBuffers;
 545       unsigned MaxTessControlAtomicCounterBuffers;
 546       unsigned MaxTessEvaluationAtomicCounterBuffers;
 547       unsigned MaxGeometryAtomicCounterBuffers;
 548       unsigned MaxFragmentAtomicCounterBuffers;
 549       unsigned MaxCombinedAtomicCounterBuffers;
 550       unsigned MaxAtomicCounterBufferSize;
 551
 552       /* ARB_compute_shader */
 553       unsigned MaxComputeAtomicCounterBuffers;
 554       unsigned MaxComputeAtomicCounters;
 555       unsigned MaxComputeImageUniforms;
 556       unsigned MaxComputeTextureImageUnits;
 557       unsigned MaxComputeUniformComponents;
 558       unsigned MaxComputeWorkGroupCount[3];
 559       unsigned MaxComputeWorkGroupSize[3];
 560
 561       /* ARB_shader_image_load_store */
 562       unsigned MaxImageUnits;
 563       unsigned MaxCombinedShaderOutputResources;
 564       unsigned MaxImageSamples;
 565       unsigned MaxVertexImageUniforms;
 566       unsigned MaxTessControlImageUniforms;
 567       unsigned MaxTessEvaluationImageUniforms;
 568       unsigned MaxGeometryImageUniforms;
 569       unsigned MaxFragmentImageUniforms;
 570       unsigned MaxCombinedImageUniforms;
 571
 572       /* ARB_viewport_array */
 573       unsigned MaxViewports;
 574
 575       /* ARB_tessellation_shader */
 576       unsigned MaxPatchVertices;
 577       unsigned MaxTessGenLevel;
 578       unsigned MaxTessControlInputComponents;
 579       unsigned MaxTessControlOutputComponents;
 580       unsigned MaxTessControlTextureImageUnits;
 581       unsigned MaxTessEvaluationInputComponents;
 582       unsigned MaxTessEvaluationOutputComponents;
 583       unsigned MaxTessEvaluationTextureImageUnits;
 584       unsigned MaxTessPatchComponents;
 585       unsigned MaxTessControlTotalOutputComponents;
 586       unsigned MaxTessControlUniformComponents;
 587       unsigned MaxTessEvaluationUniformComponents;
 588
 589       /* GL 4.5 / OES_sample_variables */
 590       unsigned MaxSamples;
 591    } Const;
 592
 593    /**
 594     * During AST to IR conversion, pointer to current IR function
 595     *
 596     * Will be \c NULL whenever the AST to IR conversion is not inside a
 597     * function definition.
 598     */
 599    class ir_function_signature *current_function;
 600
 601    /**
 602     * During AST to IR conversion, pointer to the toplevel IR
 603     * instruction list being generated.
 604     */
 605    exec_list *toplevel_ir;
 606
 607    /** Have we found a return statement in this function? */
 608    bool found_return;
 609
 610    /** Have we found the interlock builtins in this function? */
 611    bool found_begin_interlock;
 612    bool found_end_interlock;
 613
 614    /** Was there an error during compilation? */
 615    bool error;
 616
 617    /**
 618     * Are all shader inputs / outputs invariant?
 619     *
 620     * This is set when the 'STDGL invariant(all)' pragma is used.
 621     */
 622    bool all_invariant;
 623
 624    /** Loop or switch statement containing the current instructions. */
 625    class ast_iteration_statement *loop_nesting_ast;
 626
 627    struct glsl_switch_state switch_state;
 628
 629    /** List of structures defined in user code. */
 630    const glsl_type **user_structures;
 631    unsigned num_user_structures;
 632
 633    char *info_log;
 634
 635    /**
 636     * Are warnings enabled?
 637     *
 638     * Emission of warngins is controlled by '#pragma warning(...)'.
 639     */
 640    bool warnings_enabled;
 641
 642    /**
 643     * \name Enable bits for GLSL extensions
 644     */
 645    /*@{*/
 646    /* ARB extensions go here, sorted alphabetically.
 647     */
 648    bool ARB_ES3_1_compatibility_enable;
 649    bool ARB_ES3_1_compatibility_warn;
 650    bool ARB_ES3_2_compatibility_enable;
 651    bool ARB_ES3_2_compatibility_warn;
 652    bool ARB_arrays_of_arrays_enable;
 653    bool ARB_arrays_of_arrays_warn;
 654    bool ARB_bindless_texture_enable;
 655    bool ARB_bindless_texture_warn;
 656    bool ARB_compatibility_enable;
 657    bool ARB_compatibility_warn;
 658    bool ARB_compute_shader_enable;
 659    bool ARB_compute_shader_warn;
 660    bool ARB_compute_variable_group_size_enable;
 661    bool ARB_compute_variable_group_size_warn;
 662    bool ARB_conservative_depth_enable;
 663    bool ARB_conservative_depth_warn;
 664    bool ARB_cull_distance_enable;
 665    bool ARB_cull_distance_warn;
 666    bool ARB_derivative_control_enable;
 667    bool ARB_derivative_control_warn;
 668    bool ARB_draw_buffers_enable;
 669    bool ARB_draw_buffers_warn;
 670    bool ARB_draw_instanced_enable;
 671    bool ARB_draw_instanced_warn;
 672    bool ARB_enhanced_layouts_enable;
 673    bool ARB_enhanced_layouts_warn;
 674    bool ARB_explicit_attrib_location_enable;
 675    bool ARB_explicit_attrib_location_warn;
 676    bool ARB_explicit_uniform_location_enable;
 677    bool ARB_explicit_uniform_location_warn;
 678    bool ARB_fragment_coord_conventions_enable;
 679    bool ARB_fragment_coord_conventions_warn;
 680    bool ARB_fragment_layer_viewport_enable;
 681    bool ARB_fragment_layer_viewport_warn;
 682    bool ARB_fragment_shader_interlock_enable;
 683    bool ARB_fragment_shader_interlock_warn;
 684    bool ARB_gpu_shader5_enable;
 685    bool ARB_gpu_shader5_warn;
 686    bool ARB_gpu_shader_fp64_enable;
 687    bool ARB_gpu_shader_fp64_warn;
 688    bool ARB_gpu_shader_int64_enable;
 689    bool ARB_gpu_shader_int64_warn;
 690    bool ARB_post_depth_coverage_enable;
 691    bool ARB_post_depth_coverage_warn;
 692    bool ARB_sample_shading_enable;
 693    bool ARB_sample_shading_warn;
 694    bool ARB_separate_shader_objects_enable;
 695    bool ARB_separate_shader_objects_warn;
 696    bool ARB_shader_atomic_counter_ops_enable;
 697    bool ARB_shader_atomic_counter_ops_warn;
 698    bool ARB_shader_atomic_counters_enable;
 699    bool ARB_shader_atomic_counters_warn;
 700    bool ARB_shader_ballot_enable;
 701    bool ARB_shader_ballot_warn;
 702    bool ARB_shader_bit_encoding_enable;
 703    bool ARB_shader_bit_encoding_warn;
 704    bool ARB_shader_clock_enable;
 705    bool ARB_shader_clock_warn;
 706    bool ARB_shader_draw_parameters_enable;
 707    bool ARB_shader_draw_parameters_warn;
 708    bool ARB_shader_group_vote_enable;
 709    bool ARB_shader_group_vote_warn;
 710    bool ARB_shader_image_load_store_enable;
 711    bool ARB_shader_image_load_store_warn;
 712    bool ARB_shader_image_size_enable;
 713    bool ARB_shader_image_size_warn;
 714    bool ARB_shader_precision_enable;
 715    bool ARB_shader_precision_warn;
 716    bool ARB_shader_stencil_export_enable;
 717    bool ARB_shader_stencil_export_warn;
 718    bool ARB_shader_storage_buffer_object_enable;
 719    bool ARB_shader_storage_buffer_object_warn;
 720    bool ARB_shader_subroutine_enable;
 721    bool ARB_shader_subroutine_warn;
 722    bool ARB_shader_texture_image_samples_enable;
 723    bool ARB_shader_texture_image_samples_warn;
 724    bool ARB_shader_texture_lod_enable;
 725    bool ARB_shader_texture_lod_warn;
 726    bool ARB_shader_viewport_layer_array_enable;
 727    bool ARB_shader_viewport_layer_array_warn;
 728    bool ARB_shading_language_420pack_enable;
 729    bool ARB_shading_language_420pack_warn;
 730    bool ARB_shading_language_packing_enable;
 731    bool ARB_shading_language_packing_warn;
 732    bool ARB_tessellation_shader_enable;
 733    bool ARB_tessellation_shader_warn;
 734    bool ARB_texture_cube_map_array_enable;
 735    bool ARB_texture_cube_map_array_warn;
 736    bool ARB_texture_gather_enable;
 737    bool ARB_texture_gather_warn;
 738    bool ARB_texture_multisample_enable;
 739    bool ARB_texture_multisample_warn;
 740    bool ARB_texture_query_levels_enable;
 741    bool ARB_texture_query_levels_warn;
 742    bool ARB_texture_query_lod_enable;
 743    bool ARB_texture_query_lod_warn;
 744    bool ARB_texture_rectangle_enable;
 745    bool ARB_texture_rectangle_warn;
 746    bool ARB_uniform_buffer_object_enable;
 747    bool ARB_uniform_buffer_object_warn;
 748    bool ARB_vertex_attrib_64bit_enable;
 749    bool ARB_vertex_attrib_64bit_warn;
 750    bool ARB_viewport_array_enable;
 751    bool ARB_viewport_array_warn;
 752
 753    /* KHR extensions go here, sorted alphabetically.
 754     */
 755    bool KHR_blend_equation_advanced_enable;
 756    bool KHR_blend_equation_advanced_warn;
 757
 758    /* OES extensions go here, sorted alphabetically.
 759     */
 760    bool OES_EGL_image_external_enable;
 761    bool OES_EGL_image_external_warn;
 762    bool OES_EGL_image_external_essl3_enable;
 763    bool OES_EGL_image_external_essl3_warn;
 764    bool OES_geometry_point_size_enable;
 765    bool OES_geometry_point_size_warn;
 766    bool OES_geometry_shader_enable;
 767    bool OES_geometry_shader_warn;
 768    bool OES_gpu_shader5_enable;
 769    bool OES_gpu_shader5_warn;
 770    bool OES_primitive_bounding_box_enable;
 771    bool OES_primitive_bounding_box_warn;
 772    bool OES_sample_variables_enable;
 773    bool OES_sample_variables_warn;
 774    bool OES_shader_image_atomic_enable;
 775    bool OES_shader_image_atomic_warn;
 776    bool OES_shader_io_blocks_enable;
 777    bool OES_shader_io_blocks_warn;
 778    bool OES_shader_multisample_interpolation_enable;
 779    bool OES_shader_multisample_interpolation_warn;
 780    bool OES_standard_derivatives_enable;
 781    bool OES_standard_derivatives_warn;
 782    bool OES_tessellation_point_size_enable;
 783    bool OES_tessellation_point_size_warn;
 784    bool OES_tessellation_shader_enable;
 785    bool OES_tessellation_shader_warn;
 786    bool OES_texture_3D_enable;
 787    bool OES_texture_3D_warn;
 788    bool OES_texture_buffer_enable;
 789    bool OES_texture_buffer_warn;
 790    bool OES_texture_cube_map_array_enable;
 791    bool OES_texture_cube_map_array_warn;
 792    bool OES_texture_storage_multisample_2d_array_enable;
 793    bool OES_texture_storage_multisample_2d_array_warn;
 794    bool OES_viewport_array_enable;
 795    bool OES_viewport_array_warn;
 796
 797    /* All other extensions go here, sorted alphabetically.
 798     */
 799    bool AMD_conservative_depth_enable;
 800    bool AMD_conservative_depth_warn;
 801    bool AMD_gpu_shader_int64_enable;
 802    bool AMD_gpu_shader_int64_warn;
 803    bool AMD_shader_stencil_export_enable;
 804    bool AMD_shader_stencil_export_warn;
 805    bool AMD_shader_trinary_minmax_enable;
 806    bool AMD_shader_trinary_minmax_warn;
 807    bool AMD_texture_texture4_enable;
 808    bool AMD_texture_texture4_warn;
 809    bool AMD_vertex_shader_layer_enable;
 810    bool AMD_vertex_shader_layer_warn;
 811    bool AMD_vertex_shader_viewport_index_enable;
 812    bool AMD_vertex_shader_viewport_index_warn;
 813    bool ANDROID_extension_pack_es31a_enable;
 814    bool ANDROID_extension_pack_es31a_warn;
 815    bool EXT_blend_func_extended_enable;
 816    bool EXT_blend_func_extended_warn;
 817    bool EXT_clip_cull_distance_enable;
 818    bool EXT_clip_cull_distance_warn;
 819    bool EXT_draw_buffers_enable;
 820    bool EXT_draw_buffers_warn;
 821    bool EXT_frag_depth_enable;
 822    bool EXT_frag_depth_warn;
 823    bool EXT_geometry_point_size_enable;
 824    bool EXT_geometry_point_size_warn;
 825    bool EXT_geometry_shader_enable;
 826    bool EXT_geometry_shader_warn;
 827    bool EXT_gpu_shader4_enable;
 828    bool EXT_gpu_shader4_warn;
 829    bool EXT_gpu_shader5_enable;
 830    bool EXT_gpu_shader5_warn;
 831    bool EXT_primitive_bounding_box_enable;
 832    bool EXT_primitive_bounding_box_warn;
 833    bool EXT_separate_shader_objects_enable;
 834    bool EXT_separate_shader_objects_warn;
 835    bool EXT_shader_framebuffer_fetch_enable;
 836    bool EXT_shader_framebuffer_fetch_warn;
 837    bool EXT_shader_framebuffer_fetch_non_coherent_enable;
 838    bool EXT_shader_framebuffer_fetch_non_coherent_warn;
 839    bool EXT_shader_image_load_formatted_enable;
 840    bool EXT_shader_image_load_formatted_warn;
 841    bool EXT_shader_image_load_store_enable;
 842    bool EXT_shader_image_load_store_warn;
 843    bool EXT_shader_implicit_conversions_enable;
 844    bool EXT_shader_implicit_conversions_warn;
 845    bool EXT_shader_integer_mix_enable;
 846    bool EXT_shader_integer_mix_warn;
 847    bool EXT_shader_io_blocks_enable;
 848    bool EXT_shader_io_blocks_warn;
 849    bool EXT_shader_samples_identical_enable;
 850    bool EXT_shader_samples_identical_warn;
 851    bool EXT_tessellation_point_size_enable;
 852    bool EXT_tessellation_point_size_warn;
 853    bool EXT_tessellation_shader_enable;
 854    bool EXT_tessellation_shader_warn;
 855    bool EXT_texture_array_enable;
 856    bool EXT_texture_array_warn;
 857    bool EXT_texture_buffer_enable;
 858    bool EXT_texture_buffer_warn;
 859    bool EXT_texture_cube_map_array_enable;
 860    bool EXT_texture_cube_map_array_warn;
 861    bool EXT_texture_query_lod_enable;
 862    bool EXT_texture_query_lod_warn;
 863    bool EXT_texture_shadow_lod_enable;
 864    bool EXT_texture_shadow_lod_warn;
 865    bool INTEL_conservative_rasterization_enable;
 866    bool INTEL_conservative_rasterization_warn;
 867    bool INTEL_shader_atomic_float_minmax_enable;
 868    bool INTEL_shader_atomic_float_minmax_warn;
 869    bool MESA_shader_integer_functions_enable;
 870    bool MESA_shader_integer_functions_warn;
 871    bool NV_compute_shader_derivatives_enable;
 872    bool NV_compute_shader_derivatives_warn;
 873    bool NV_fragment_shader_interlock_enable;
 874    bool NV_fragment_shader_interlock_warn;
 875    bool NV_image_formats_enable;
 876    bool NV_image_formats_warn;
 877    bool NV_shader_atomic_float_enable;
 878    bool NV_shader_atomic_float_warn;
 879    /*@}*/
 880
 881    /** Extensions supported by the OpenGL implementation. */
 882    const struct gl_extensions *extensions;
 883
 884    bool uses_builtin_functions;
 885    bool fs_uses_gl_fragcoord;
 886
 887    /**
 888     * For geometry shaders, size of the most recently seen input declaration
 889     * that was a sized array, or 0 if no sized input array declarations have
 890     * been seen.
 891     *
 892     * Unused for other shader types.
 893     */
 894    unsigned gs_input_size;
 895
 896    bool fs_early_fragment_tests;
 897
 898    bool fs_inner_coverage;
 899
 900    bool fs_post_depth_coverage;
 901
 902    bool fs_pixel_interlock_ordered;
 903    bool fs_pixel_interlock_unordered;
 904    bool fs_sample_interlock_ordered;
 905    bool fs_sample_interlock_unordered;
 906
 907    unsigned fs_blend_support;
 908
 909    /**
 910     * For tessellation control shaders, size of the most recently seen output
 911     * declaration that was a sized array, or 0 if no sized output array
 912     * declarations have been seen.
 913     *
 914     * Unused for other shader types.
 915     */
 916    unsigned tcs_output_size;
 917
 918    /** Atomic counter offsets by binding */
 919    unsigned atomic_counter_offsets[MAX_COMBINED_ATOMIC_BUFFERS];
 920
 921    bool allow_extension_directive_midshader;
 922    bool allow_builtin_variable_redeclaration;
 923    bool allow_layout_qualifier_on_function_parameter;
 924
 925    /**
 926     * Known subroutine type declarations.
 927     */
 928    int num_subroutine_types;
 929    ir_function **subroutine_types;
 930
 931    /**
 932     * Functions that are associated with
 933     * subroutine types.
 934     */
 935    int num_subroutines;
 936    ir_function **subroutines;
 937
 938    /**
 939     * field selection temporary parser storage -
 940     * did the parser just parse a dot.
 941     */
 942    bool is_field;
 943
 944    /**
 945     * seen values for clip/cull distance sizes
 946     * so we can check totals aren't too large.
 947     */
 948    unsigned clip_dist_size, cull_dist_size;
 949 };
 950
 951 # define YYLLOC_DEFAULT(Current, Rhs, N)                        \
 952 do {                                                            \
 953    if (N)                                                       \
 954    {                                                            \
 955       (Current).first_line   = YYRHSLOC(Rhs, 1).first_line;     \
 956       (Current).first_column = YYRHSLOC(Rhs, 1).first_column;   \
 957       (Current).last_line    = YYRHSLOC(Rhs, N).last_line;      \
 958       (Current).last_column  = YYRHSLOC(Rhs, N).last_column;    \
 959    }                                                            \
 960    else                                                         \
 961    {                                                            \
 962       (Current).first_line   = (Current).last_line =            \
 963          YYRHSLOC(Rhs, 0).last_line;                            \
 964       (Current).first_column = (Current).last_column =          \
 965          YYRHSLOC(Rhs, 0).last_column;                          \
 966    }                                                            \
 967    (Current).source = 0;                                        \
 968 } while (0)
 969
 970 /**
 971  * Emit a warning to the shader log
 972  *
 973  * \sa _mesa_glsl_error
 974  */
 975 extern void _mesa_glsl_warning(const YYLTYPE *locp,
 976                                _mesa_glsl_parse_state *state,
 977                                const char *fmt, ...);
 978
 979 extern void _mesa_glsl_lexer_ctor(struct _mesa_glsl_parse_state *state,
 980                                   const char *string);
 981
 982 extern void _mesa_glsl_lexer_dtor(struct _mesa_glsl_parse_state *state);
 983
 984 union YYSTYPE;
 985 extern int _mesa_glsl_lexer_lex(union YYSTYPE *yylval, YYLTYPE *yylloc,
 986                                 void *scanner);
 987
 988 extern int _mesa_glsl_parse(struct _mesa_glsl_parse_state *);
 989
 990 /**
 991  * Process elements of the #extension directive
 992  *
 993  * \return
 994  * If \c name and \c behavior are valid, \c true is returned.  Otherwise
 995  * \c false is returned.
 996  */
 997 extern bool _mesa_glsl_process_extension(const char *name, YYLTYPE *name_locp,
 998                                          const char *behavior,
 999                                          YYLTYPE *behavior_locp,
1000                                          _mesa_glsl_parse_state *state);
1001
1002 #endif /* __cplusplus */
1003
1004
1005 /*
1006  * These definitions apply to C and C++
1007  */
1008 #ifdef __cplusplus
1009 extern "C" {
1010 #endif
1011
1012 struct glcpp_parser;
1013 struct _mesa_glsl_parse_state;
1014
1015 typedef void (*glcpp_extension_iterator)(
1016               struct _mesa_glsl_parse_state *state,
1017               void (*add_builtin_define)(struct glcpp_parser *, const char *, int),
1018               struct glcpp_parser *data,
1019               unsigned version,
1020               bool es);
1021
1022 extern int glcpp_preprocess(void *ctx, const char **shader, char **info_log,
1023                             glcpp_extension_iterator extensions,
1024                             struct _mesa_glsl_parse_state *state,
1025                             struct gl_context *gl_ctx);
1026
1027 extern void _mesa_init_shader_compiler_types(void);
1028 extern void _mesa_destroy_shader_compiler_types(void);
1029 extern void _mesa_destroy_shader_compiler(void);
1030 extern void _mesa_destroy_shader_compiler_caches(void);
1031
1032 extern void
1033 _mesa_glsl_copy_symbols_from_table(struct exec_list *shader_ir,
1034                                    struct glsl_symbol_table *src,
1035                                    struct glsl_symbol_table *dest);
1036
1037 #ifdef __cplusplus
1038 }
1039 #endif
1040
1041
1042 #endif /* GLSL_PARSER_EXTRAS_H */