src/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 suports 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_precision_qualifiers_allowed(YYLTYPE *locp)
 119    {
 120       return check_version(130, 100, locp,
 121                            "precision qualifiers are forbidden");
 122    }
 123
 124    bool check_bitwise_operations_allowed(YYLTYPE *locp)
 125    {
 126       return check_version(130, 300, locp, "bit-wise operations are forbidden");
 127    }
 128
 129    bool check_explicit_attrib_stream_allowed(YYLTYPE *locp)
 130    {
 131       if (!this->has_explicit_attrib_stream()) {
 132          const char *const requirement = "GL_ARB_gpu_shader5 extension or GLSL 4.00";
 133
 134          _mesa_glsl_error(locp, this, "explicit stream requires %s",
 135                           requirement);
 136          return false;
 137       }
 138
 139       return true;
 140    }
 141
 142    bool check_explicit_attrib_location_allowed(YYLTYPE *locp,
 143                                                const ir_variable *var)
 144    {
 145       if (!this->has_explicit_attrib_location()) {
 146          const char *const requirement = this->es_shader
 147             ? "GLSL ES 3.00"
 148             : "GL_ARB_explicit_attrib_location extension or GLSL 3.30";
 149
 150          _mesa_glsl_error(locp, this, "%s explicit location requires %s",
 151                           mode_string(var), requirement);
 152          return false;
 153       }
 154
 155       return true;
 156    }
 157
 158    bool check_separate_shader_objects_allowed(YYLTYPE *locp,
 159                                               const ir_variable *var)
 160    {
 161       if (!this->has_separate_shader_objects()) {
 162          const char *const requirement = this->es_shader
 163             ? "GL_EXT_separate_shader_objects extension or GLSL ES 3.10"
 164             : "GL_ARB_separate_shader_objects extension or GLSL 4.20";
 165
 166          _mesa_glsl_error(locp, this, "%s explicit location requires %s",
 167                           mode_string(var), requirement);
 168          return false;
 169       }
 170
 171       return true;
 172    }
 173
 174    bool check_explicit_uniform_location_allowed(YYLTYPE *locp,
 175                                                 const ir_variable *)
 176    {
 177       if (!this->has_explicit_attrib_location() ||
 178           !this->has_explicit_uniform_location()) {
 179          const char *const requirement = this->es_shader
 180             ? "GLSL ES 3.10"
 181             : "GL_ARB_explicit_uniform_location and either "
 182               "GL_ARB_explicit_attrib_location or GLSL 3.30.";
 183
 184          _mesa_glsl_error(locp, this,
 185                           "uniform explicit location requires %s",
 186                           requirement);
 187          return false;
 188       }
 189
 190       return true;
 191    }
 192
 193    bool has_atomic_counters() const
 194    {
 195       return ARB_shader_atomic_counters_enable || is_version(420, 310);
 196    }
 197
 198    bool has_explicit_attrib_stream() const
 199    {
 200       return ARB_gpu_shader5_enable || is_version(400, 0);
 201    }
 202
 203    bool has_explicit_attrib_location() const
 204    {
 205       return ARB_explicit_attrib_location_enable || is_version(330, 300);
 206    }
 207
 208    bool has_explicit_uniform_location() const
 209    {
 210       return ARB_explicit_uniform_location_enable || is_version(430, 310);
 211    }
 212
 213    bool has_uniform_buffer_objects() const
 214    {
 215       return ARB_uniform_buffer_object_enable || is_version(140, 300);
 216    }
 217
 218    bool has_shader_storage_buffer_objects() const
 219    {
 220       return ARB_shader_storage_buffer_object_enable || is_version(430, 310);
 221    }
 222
 223    bool has_separate_shader_objects() const
 224    {
 225       return ARB_separate_shader_objects_enable || is_version(410, 310)
 226          || EXT_separate_shader_objects_enable;
 227    }
 228
 229    bool has_double() const
 230    {
 231       return ARB_gpu_shader_fp64_enable || is_version(400, 0);
 232    }
 233
 234    bool has_420pack() const
 235    {
 236       return ARB_shading_language_420pack_enable || is_version(420, 0);
 237    }
 238
 239    bool has_compute_shader() const
 240    {
 241       return ARB_compute_shader_enable || is_version(430, 310);
 242    }
 243
 244    void process_version_directive(YYLTYPE *locp, int version,
 245                                   const char *ident);
 246
 247    struct gl_context *const ctx;
 248    void *scanner;
 249    exec_list translation_unit;
 250    glsl_symbol_table *symbols;
 251
 252    unsigned num_supported_versions;
 253    struct {
 254       unsigned ver;
 255       bool es;
 256    } supported_versions[15];
 257
 258    bool es_shader;
 259    unsigned language_version;
 260    unsigned forced_language_version;
 261    gl_shader_stage stage;
 262
 263    /**
 264     * Number of nested struct_specifier levels
 265     *
 266     * Outside a struct_specifier, this is zero.
 267     */
 268    unsigned struct_specifier_depth;
 269
 270    /**
 271     * Default uniform layout qualifiers tracked during parsing.
 272     * Currently affects uniform blocks and uniform buffer variables in
 273     * those blocks.
 274     */
 275    struct ast_type_qualifier *default_uniform_qualifier;
 276
 277    /**
 278     * Default shader storage layout qualifiers tracked during parsing.
 279     * Currently affects shader storage blocks and shader storage buffer
 280     * variables in those blocks.
 281     */
 282    struct ast_type_qualifier *default_shader_storage_qualifier;
 283
 284    /**
 285     * Variables to track different cases if a fragment shader redeclares
 286     * built-in variable gl_FragCoord.
 287     *
 288     * Note: These values are computed at ast_to_hir time rather than at parse
 289     * time.
 290     */
 291    bool fs_redeclares_gl_fragcoord;
 292    bool fs_origin_upper_left;
 293    bool fs_pixel_center_integer;
 294    bool fs_redeclares_gl_fragcoord_with_no_layout_qualifiers;
 295
 296    /**
 297     * True if a geometry shader input primitive type or tessellation control
 298     * output vertices were specified using a layout directive.
 299     *
 300     * Note: these values are computed at ast_to_hir time rather than at parse
 301     * time.
 302     */
 303    bool gs_input_prim_type_specified;
 304    bool tcs_output_vertices_specified;
 305
 306    /**
 307     * Input layout qualifiers from GLSL 1.50 (geometry shader controls),
 308     * and GLSL 4.00 (tessellation evaluation shader)
 309     */
 310    struct ast_type_qualifier *in_qualifier;
 311
 312    /**
 313     * True if a compute shader input local size was specified using a layout
 314     * directive.
 315     *
 316     * Note: this value is computed at ast_to_hir time rather than at parse
 317     * time.
 318     */
 319    bool cs_input_local_size_specified;
 320
 321    /**
 322     * If cs_input_local_size_specified is true, the local size that was
 323     * specified.  Otherwise ignored.
 324     */
 325    unsigned cs_input_local_size[3];
 326
 327    /**
 328     * Output layout qualifiers from GLSL 1.50 (geometry shader controls),
 329     * and GLSL 4.00 (tessellation control shader).
 330     */
 331    struct ast_type_qualifier *out_qualifier;
 332
 333    /**
 334     * Printable list of GLSL versions supported by the current context
 335     *
 336     * \note
 337     * This string should probably be generated per-context instead of per
 338     * invokation of the compiler.  This should be changed when the method of
 339     * tracking supported GLSL versions changes.
 340     */
 341    const char *supported_version_string;
 342
 343    /**
 344     * Implementation defined limits that affect built-in variables, etc.
 345     *
 346     * \sa struct gl_constants (in mtypes.h)
 347     */
 348    struct {
 349       /* 1.10 */
 350       unsigned MaxLights;
 351       unsigned MaxClipPlanes;
 352       unsigned MaxTextureUnits;
 353       unsigned MaxTextureCoords;
 354       unsigned MaxVertexAttribs;
 355       unsigned MaxVertexUniformComponents;
 356       unsigned MaxVertexTextureImageUnits;
 357       unsigned MaxCombinedTextureImageUnits;
 358       unsigned MaxTextureImageUnits;
 359       unsigned MaxFragmentUniformComponents;
 360
 361       /* ARB_draw_buffers */
 362       unsigned MaxDrawBuffers;
 363
 364       /* 3.00 ES */
 365       int MinProgramTexelOffset;
 366       int MaxProgramTexelOffset;
 367
 368       /* 1.50 */
 369       unsigned MaxVertexOutputComponents;
 370       unsigned MaxGeometryInputComponents;
 371       unsigned MaxGeometryOutputComponents;
 372       unsigned MaxFragmentInputComponents;
 373       unsigned MaxGeometryTextureImageUnits;
 374       unsigned MaxGeometryOutputVertices;
 375       unsigned MaxGeometryTotalOutputComponents;
 376       unsigned MaxGeometryUniformComponents;
 377
 378       /* ARB_shader_atomic_counters */
 379       unsigned MaxVertexAtomicCounters;
 380       unsigned MaxTessControlAtomicCounters;
 381       unsigned MaxTessEvaluationAtomicCounters;
 382       unsigned MaxGeometryAtomicCounters;
 383       unsigned MaxFragmentAtomicCounters;
 384       unsigned MaxCombinedAtomicCounters;
 385       unsigned MaxAtomicBufferBindings;
 386
 387       /* These are also atomic counter related, but they weren't added to
 388        * until atomic counters were added to core in GLSL 4.20 and GLSL ES
 389        * 3.10.
 390        */
 391       unsigned MaxVertexAtomicCounterBuffers;
 392       unsigned MaxTessControlAtomicCounterBuffers;
 393       unsigned MaxTessEvaluationAtomicCounterBuffers;
 394       unsigned MaxGeometryAtomicCounterBuffers;
 395       unsigned MaxFragmentAtomicCounterBuffers;
 396       unsigned MaxCombinedAtomicCounterBuffers;
 397       unsigned MaxAtomicCounterBufferSize;
 398
 399       /* ARB_compute_shader */
 400       unsigned MaxComputeWorkGroupCount[3];
 401       unsigned MaxComputeWorkGroupSize[3];
 402
 403       /* ARB_shader_image_load_store */
 404       unsigned MaxImageUnits;
 405       unsigned MaxCombinedShaderOutputResources;
 406       unsigned MaxImageSamples;
 407       unsigned MaxVertexImageUniforms;
 408       unsigned MaxTessControlImageUniforms;
 409       unsigned MaxTessEvaluationImageUniforms;
 410       unsigned MaxGeometryImageUniforms;
 411       unsigned MaxFragmentImageUniforms;
 412       unsigned MaxCombinedImageUniforms;
 413
 414       /* ARB_viewport_array */
 415       unsigned MaxViewports;
 416
 417       /* ARB_tessellation_shader */
 418       unsigned MaxPatchVertices;
 419       unsigned MaxTessGenLevel;
 420       unsigned MaxTessControlInputComponents;
 421       unsigned MaxTessControlOutputComponents;
 422       unsigned MaxTessControlTextureImageUnits;
 423       unsigned MaxTessEvaluationInputComponents;
 424       unsigned MaxTessEvaluationOutputComponents;
 425       unsigned MaxTessEvaluationTextureImageUnits;
 426       unsigned MaxTessPatchComponents;
 427       unsigned MaxTessControlTotalOutputComponents;
 428       unsigned MaxTessControlUniformComponents;
 429       unsigned MaxTessEvaluationUniformComponents;
 430    } Const;
 431
 432    /**
 433     * During AST to IR conversion, pointer to current IR function
 434     *
 435     * Will be \c NULL whenever the AST to IR conversion is not inside a
 436     * function definition.
 437     */
 438    class ir_function_signature *current_function;
 439
 440    /**
 441     * During AST to IR conversion, pointer to the toplevel IR
 442     * instruction list being generated.
 443     */
 444    exec_list *toplevel_ir;
 445
 446    /** Have we found a return statement in this function? */
 447    bool found_return;
 448
 449    /** Was there an error during compilation? */
 450    bool error;
 451
 452    /**
 453     * Are all shader inputs / outputs invariant?
 454     *
 455     * This is set when the 'STDGL invariant(all)' pragma is used.
 456     */
 457    bool all_invariant;
 458
 459    /** Loop or switch statement containing the current instructions. */
 460    class ast_iteration_statement *loop_nesting_ast;
 461
 462    struct glsl_switch_state switch_state;
 463
 464    /** List of structures defined in user code. */
 465    const glsl_type **user_structures;
 466    unsigned num_user_structures;
 467
 468    char *info_log;
 469
 470    /**
 471     * \name Enable bits for GLSL extensions
 472     */
 473    /*@{*/
 474    /* ARB extensions go here, sorted alphabetically.
 475     */
 476    bool ARB_arrays_of_arrays_enable;
 477    bool ARB_arrays_of_arrays_warn;
 478    bool ARB_compute_shader_enable;
 479    bool ARB_compute_shader_warn;
 480    bool ARB_conservative_depth_enable;
 481    bool ARB_conservative_depth_warn;
 482    bool ARB_derivative_control_enable;
 483    bool ARB_derivative_control_warn;
 484    bool ARB_draw_buffers_enable;
 485    bool ARB_draw_buffers_warn;
 486    bool ARB_draw_instanced_enable;
 487    bool ARB_draw_instanced_warn;
 488    bool ARB_explicit_attrib_location_enable;
 489    bool ARB_explicit_attrib_location_warn;
 490    bool ARB_explicit_uniform_location_enable;
 491    bool ARB_explicit_uniform_location_warn;
 492    bool ARB_fragment_coord_conventions_enable;
 493    bool ARB_fragment_coord_conventions_warn;
 494    bool ARB_fragment_layer_viewport_enable;
 495    bool ARB_fragment_layer_viewport_warn;
 496    bool ARB_gpu_shader5_enable;
 497    bool ARB_gpu_shader5_warn;
 498    bool ARB_gpu_shader_fp64_enable;
 499    bool ARB_gpu_shader_fp64_warn;
 500    bool ARB_sample_shading_enable;
 501    bool ARB_sample_shading_warn;
 502    bool ARB_separate_shader_objects_enable;
 503    bool ARB_separate_shader_objects_warn;
 504    bool ARB_shader_atomic_counters_enable;
 505    bool ARB_shader_atomic_counters_warn;
 506    bool ARB_shader_bit_encoding_enable;
 507    bool ARB_shader_bit_encoding_warn;
 508    bool ARB_shader_image_load_store_enable;
 509    bool ARB_shader_image_load_store_warn;
 510    bool ARB_shader_image_size_enable;
 511    bool ARB_shader_image_size_warn;
 512    bool ARB_shader_precision_enable;
 513    bool ARB_shader_precision_warn;
 514    bool ARB_shader_stencil_export_enable;
 515    bool ARB_shader_stencil_export_warn;
 516    bool ARB_shader_storage_buffer_object_enable;
 517    bool ARB_shader_storage_buffer_object_warn;
 518    bool ARB_shader_subroutine_enable;
 519    bool ARB_shader_subroutine_warn;
 520    bool ARB_shader_texture_image_samples_enable;
 521    bool ARB_shader_texture_image_samples_warn;
 522    bool ARB_shader_texture_lod_enable;
 523    bool ARB_shader_texture_lod_warn;
 524    bool ARB_shading_language_420pack_enable;
 525    bool ARB_shading_language_420pack_warn;
 526    bool ARB_shading_language_packing_enable;
 527    bool ARB_shading_language_packing_warn;
 528    bool ARB_tessellation_shader_enable;
 529    bool ARB_tessellation_shader_warn;
 530    bool ARB_texture_cube_map_array_enable;
 531    bool ARB_texture_cube_map_array_warn;
 532    bool ARB_texture_gather_enable;
 533    bool ARB_texture_gather_warn;
 534    bool ARB_texture_multisample_enable;
 535    bool ARB_texture_multisample_warn;
 536    bool ARB_texture_query_levels_enable;
 537    bool ARB_texture_query_levels_warn;
 538    bool ARB_texture_query_lod_enable;
 539    bool ARB_texture_query_lod_warn;
 540    bool ARB_texture_rectangle_enable;
 541    bool ARB_texture_rectangle_warn;
 542    bool ARB_uniform_buffer_object_enable;
 543    bool ARB_uniform_buffer_object_warn;
 544    bool ARB_vertex_attrib_64bit_enable;
 545    bool ARB_vertex_attrib_64bit_warn;
 546    bool ARB_viewport_array_enable;
 547    bool ARB_viewport_array_warn;
 548
 549    /* KHR extensions go here, sorted alphabetically.
 550     */
 551
 552    /* OES extensions go here, sorted alphabetically.
 553     */
 554    bool OES_EGL_image_external_enable;
 555    bool OES_EGL_image_external_warn;
 556    bool OES_standard_derivatives_enable;
 557    bool OES_standard_derivatives_warn;
 558    bool OES_texture_3D_enable;
 559    bool OES_texture_3D_warn;
 560    bool OES_texture_storage_multisample_2d_array_enable;
 561    bool OES_texture_storage_multisample_2d_array_warn;
 562
 563    /* All other extensions go here, sorted alphabetically.
 564     */
 565    bool AMD_conservative_depth_enable;
 566    bool AMD_conservative_depth_warn;
 567    bool AMD_shader_stencil_export_enable;
 568    bool AMD_shader_stencil_export_warn;
 569    bool AMD_shader_trinary_minmax_enable;
 570    bool AMD_shader_trinary_minmax_warn;
 571    bool AMD_vertex_shader_layer_enable;
 572    bool AMD_vertex_shader_layer_warn;
 573    bool AMD_vertex_shader_viewport_index_enable;
 574    bool AMD_vertex_shader_viewport_index_warn;
 575    bool EXT_draw_buffers_enable;
 576    bool EXT_draw_buffers_warn;
 577    bool EXT_separate_shader_objects_enable;
 578    bool EXT_separate_shader_objects_warn;
 579    bool EXT_shader_integer_mix_enable;
 580    bool EXT_shader_integer_mix_warn;
 581    bool EXT_texture_array_enable;
 582    bool EXT_texture_array_warn;
 583    /*@}*/
 584
 585    /** Extensions supported by the OpenGL implementation. */
 586    const struct gl_extensions *extensions;
 587
 588    bool uses_builtin_functions;
 589    bool fs_uses_gl_fragcoord;
 590
 591    /**
 592     * For geometry shaders, size of the most recently seen input declaration
 593     * that was a sized array, or 0 if no sized input array declarations have
 594     * been seen.
 595     *
 596     * Unused for other shader types.
 597     */
 598    unsigned gs_input_size;
 599
 600    bool fs_early_fragment_tests;
 601
 602    /**
 603     * For tessellation control shaders, size of the most recently seen output
 604     * declaration that was a sized array, or 0 if no sized output array
 605     * declarations have been seen.
 606     *
 607     * Unused for other shader types.
 608     */
 609    unsigned tcs_output_size;
 610
 611    /** Atomic counter offsets by binding */
 612    unsigned atomic_counter_offsets[MAX_COMBINED_ATOMIC_BUFFERS];
 613
 614    bool allow_extension_directive_midshader;
 615
 616    /**
 617     * Known subroutine type declarations.
 618     */
 619    int num_subroutine_types;
 620    ir_function **subroutine_types;
 621
 622    /**
 623     * Functions that are associated with
 624     * subroutine types.
 625     */
 626    int num_subroutines;
 627    ir_function **subroutines;
 628
 629    /**
 630     * field selection temporary parser storage -
 631     * did the parser just parse a dot.
 632     */
 633    bool is_field;
 634 };
 635
 636 # define YYLLOC_DEFAULT(Current, Rhs, N)                        \
 637 do {                                                            \
 638    if (N)                                                       \
 639    {                                                            \
 640       (Current).first_line   = YYRHSLOC(Rhs, 1).first_line;     \
 641       (Current).first_column = YYRHSLOC(Rhs, 1).first_column;   \
 642       (Current).last_line    = YYRHSLOC(Rhs, N).last_line;      \
 643       (Current).last_column  = YYRHSLOC(Rhs, N).last_column;    \
 644    }                                                            \
 645    else                                                         \
 646    {                                                            \
 647       (Current).first_line   = (Current).last_line =            \
 648          YYRHSLOC(Rhs, 0).last_line;                            \
 649       (Current).first_column = (Current).last_column =          \
 650          YYRHSLOC(Rhs, 0).last_column;                          \
 651    }                                                            \
 652    (Current).source = 0;                                        \
 653 } while (0)
 654
 655 /**
 656  * Emit a warning to the shader log
 657  *
 658  * \sa _mesa_glsl_error
 659  */
 660 extern void _mesa_glsl_warning(const YYLTYPE *locp,
 661                                _mesa_glsl_parse_state *state,
 662                                const char *fmt, ...);
 663
 664 extern void _mesa_glsl_lexer_ctor(struct _mesa_glsl_parse_state *state,
 665                                   const char *string);
 666
 667 extern void _mesa_glsl_lexer_dtor(struct _mesa_glsl_parse_state *state);
 668
 669 union YYSTYPE;
 670 extern int _mesa_glsl_lexer_lex(union YYSTYPE *yylval, YYLTYPE *yylloc,
 671                                 void *scanner);
 672
 673 extern int _mesa_glsl_parse(struct _mesa_glsl_parse_state *);
 674
 675 /**
 676  * Process elements of the #extension directive
 677  *
 678  * \return
 679  * If \c name and \c behavior are valid, \c true is returned.  Otherwise
 680  * \c false is returned.
 681  */
 682 extern bool _mesa_glsl_process_extension(const char *name, YYLTYPE *name_locp,
 683                                          const char *behavior,
 684                                          YYLTYPE *behavior_locp,
 685                                          _mesa_glsl_parse_state *state);
 686
 687 #endif /* __cplusplus */
 688
 689
 690 /*
 691  * These definitions apply to C and C++
 692  */
 693 #ifdef __cplusplus
 694 extern "C" {
 695 #endif
 696
 697 /**
 698  * Get the textual name of the specified shader stage (which is a
 699  * gl_shader_stage).
 700  */
 701 extern const char *
 702 _mesa_shader_stage_to_string(unsigned stage);
 703
 704 extern const char *
 705 _mesa_shader_stage_to_abbrev(unsigned stage);
 706
 707 extern int glcpp_preprocess(void *ctx, const char **shader, char **info_log,
 708                       const struct gl_extensions *extensions, struct gl_context *gl_ctx);
 709
 710 extern void _mesa_destroy_shader_compiler(void);
 711 extern void _mesa_destroy_shader_compiler_caches(void);
 712
 713 #ifdef __cplusplus
 714 }
 715 #endif
 716
 717
 718 #endif /* GLSL_PARSER_EXTRAS_H */