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