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_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_compute_shader() const
 259    {
 260       return ARB_compute_shader_enable || is_version(430, 310);
 261    }
 262
 263    void process_version_directive(YYLTYPE *locp, int version,
 264                                   const char *ident);
 265
 266    struct gl_context *const ctx;
 267    void *scanner;
 268    exec_list translation_unit;
 269    glsl_symbol_table *symbols;
 270
 271    unsigned num_supported_versions;
 272    struct {
 273       unsigned ver;
 274       bool es;
 275    } supported_versions[15];
 276
 277    bool es_shader;
 278    unsigned language_version;
 279    unsigned forced_language_version;
 280    gl_shader_stage stage;
 281
 282    /**
 283     * Number of nested struct_specifier levels
 284     *
 285     * Outside a struct_specifier, this is zero.
 286     */
 287    unsigned struct_specifier_depth;
 288
 289    /**
 290     * Default uniform layout qualifiers tracked during parsing.
 291     * Currently affects uniform blocks and uniform buffer variables in
 292     * those blocks.
 293     */
 294    struct ast_type_qualifier *default_uniform_qualifier;
 295
 296    /**
 297     * Default shader storage layout qualifiers tracked during parsing.
 298     * Currently affects shader storage blocks and shader storage buffer
 299     * variables in those blocks.
 300     */
 301    struct ast_type_qualifier *default_shader_storage_qualifier;
 302
 303    /**
 304     * Variables to track different cases if a fragment shader redeclares
 305     * built-in variable gl_FragCoord.
 306     *
 307     * Note: These values are computed at ast_to_hir time rather than at parse
 308     * time.
 309     */
 310    bool fs_redeclares_gl_fragcoord;
 311    bool fs_origin_upper_left;
 312    bool fs_pixel_center_integer;
 313    bool fs_redeclares_gl_fragcoord_with_no_layout_qualifiers;
 314
 315    /**
 316     * True if a geometry shader input primitive type or tessellation control
 317     * output vertices were specified using a layout directive.
 318     *
 319     * Note: these values are computed at ast_to_hir time rather than at parse
 320     * time.
 321     */
 322    bool gs_input_prim_type_specified;
 323    bool tcs_output_vertices_specified;
 324
 325    /**
 326     * Input layout qualifiers from GLSL 1.50 (geometry shader controls),
 327     * and GLSL 4.00 (tessellation evaluation shader)
 328     */
 329    struct ast_type_qualifier *in_qualifier;
 330
 331    /**
 332     * True if a compute shader input local size was specified using a layout
 333     * directive.
 334     *
 335     * Note: this value is computed at ast_to_hir time rather than at parse
 336     * time.
 337     */
 338    bool cs_input_local_size_specified;
 339
 340    /**
 341     * If cs_input_local_size_specified is true, the local size that was
 342     * specified.  Otherwise ignored.
 343     */
 344    unsigned cs_input_local_size[3];
 345
 346    /**
 347     * Output layout qualifiers from GLSL 1.50 (geometry shader controls),
 348     * and GLSL 4.00 (tessellation control shader).
 349     */
 350    struct ast_type_qualifier *out_qualifier;
 351
 352    /**
 353     * Printable list of GLSL versions supported by the current context
 354     *
 355     * \note
 356     * This string should probably be generated per-context instead of per
 357     * invokation of the compiler.  This should be changed when the method of
 358     * tracking supported GLSL versions changes.
 359     */
 360    const char *supported_version_string;
 361
 362    /**
 363     * Implementation defined limits that affect built-in variables, etc.
 364     *
 365     * \sa struct gl_constants (in mtypes.h)
 366     */
 367    struct {
 368       /* 1.10 */
 369       unsigned MaxLights;
 370       unsigned MaxClipPlanes;
 371       unsigned MaxTextureUnits;
 372       unsigned MaxTextureCoords;
 373       unsigned MaxVertexAttribs;
 374       unsigned MaxVertexUniformComponents;
 375       unsigned MaxVertexTextureImageUnits;
 376       unsigned MaxCombinedTextureImageUnits;
 377       unsigned MaxTextureImageUnits;
 378       unsigned MaxFragmentUniformComponents;
 379
 380       /* ARB_draw_buffers */
 381       unsigned MaxDrawBuffers;
 382
 383       /* 3.00 ES */
 384       int MinProgramTexelOffset;
 385       int MaxProgramTexelOffset;
 386
 387       /* 1.50 */
 388       unsigned MaxVertexOutputComponents;
 389       unsigned MaxGeometryInputComponents;
 390       unsigned MaxGeometryOutputComponents;
 391       unsigned MaxFragmentInputComponents;
 392       unsigned MaxGeometryTextureImageUnits;
 393       unsigned MaxGeometryOutputVertices;
 394       unsigned MaxGeometryTotalOutputComponents;
 395       unsigned MaxGeometryUniformComponents;
 396
 397       /* ARB_shader_atomic_counters */
 398       unsigned MaxVertexAtomicCounters;
 399       unsigned MaxTessControlAtomicCounters;
 400       unsigned MaxTessEvaluationAtomicCounters;
 401       unsigned MaxGeometryAtomicCounters;
 402       unsigned MaxFragmentAtomicCounters;
 403       unsigned MaxCombinedAtomicCounters;
 404       unsigned MaxAtomicBufferBindings;
 405
 406       /* These are also atomic counter related, but they weren't added to
 407        * until atomic counters were added to core in GLSL 4.20 and GLSL ES
 408        * 3.10.
 409        */
 410       unsigned MaxVertexAtomicCounterBuffers;
 411       unsigned MaxTessControlAtomicCounterBuffers;
 412       unsigned MaxTessEvaluationAtomicCounterBuffers;
 413       unsigned MaxGeometryAtomicCounterBuffers;
 414       unsigned MaxFragmentAtomicCounterBuffers;
 415       unsigned MaxCombinedAtomicCounterBuffers;
 416       unsigned MaxAtomicCounterBufferSize;
 417
 418       /* ARB_compute_shader */
 419       unsigned MaxComputeWorkGroupCount[3];
 420       unsigned MaxComputeWorkGroupSize[3];
 421
 422       /* ARB_shader_image_load_store */
 423       unsigned MaxImageUnits;
 424       unsigned MaxCombinedShaderOutputResources;
 425       unsigned MaxImageSamples;
 426       unsigned MaxVertexImageUniforms;
 427       unsigned MaxTessControlImageUniforms;
 428       unsigned MaxTessEvaluationImageUniforms;
 429       unsigned MaxGeometryImageUniforms;
 430       unsigned MaxFragmentImageUniforms;
 431       unsigned MaxCombinedImageUniforms;
 432
 433       /* ARB_viewport_array */
 434       unsigned MaxViewports;
 435
 436       /* ARB_tessellation_shader */
 437       unsigned MaxPatchVertices;
 438       unsigned MaxTessGenLevel;
 439       unsigned MaxTessControlInputComponents;
 440       unsigned MaxTessControlOutputComponents;
 441       unsigned MaxTessControlTextureImageUnits;
 442       unsigned MaxTessEvaluationInputComponents;
 443       unsigned MaxTessEvaluationOutputComponents;
 444       unsigned MaxTessEvaluationTextureImageUnits;
 445       unsigned MaxTessPatchComponents;
 446       unsigned MaxTessControlTotalOutputComponents;
 447       unsigned MaxTessControlUniformComponents;
 448       unsigned MaxTessEvaluationUniformComponents;
 449    } Const;
 450
 451    /**
 452     * During AST to IR conversion, pointer to current IR function
 453     *
 454     * Will be \c NULL whenever the AST to IR conversion is not inside a
 455     * function definition.
 456     */
 457    class ir_function_signature *current_function;
 458
 459    /**
 460     * During AST to IR conversion, pointer to the toplevel IR
 461     * instruction list being generated.
 462     */
 463    exec_list *toplevel_ir;
 464
 465    /** Have we found a return statement in this function? */
 466    bool found_return;
 467
 468    /** Was there an error during compilation? */
 469    bool error;
 470
 471    /**
 472     * Are all shader inputs / outputs invariant?
 473     *
 474     * This is set when the 'STDGL invariant(all)' pragma is used.
 475     */
 476    bool all_invariant;
 477
 478    /** Loop or switch statement containing the current instructions. */
 479    class ast_iteration_statement *loop_nesting_ast;
 480
 481    struct glsl_switch_state switch_state;
 482
 483    /** List of structures defined in user code. */
 484    const glsl_type **user_structures;
 485    unsigned num_user_structures;
 486
 487    char *info_log;
 488
 489    /**
 490     * \name Enable bits for GLSL extensions
 491     */
 492    /*@{*/
 493    /* ARB extensions go here, sorted alphabetically.
 494     */
 495    bool ARB_arrays_of_arrays_enable;
 496    bool ARB_arrays_of_arrays_warn;
 497    bool ARB_compute_shader_enable;
 498    bool ARB_compute_shader_warn;
 499    bool ARB_conservative_depth_enable;
 500    bool ARB_conservative_depth_warn;
 501    bool ARB_derivative_control_enable;
 502    bool ARB_derivative_control_warn;
 503    bool ARB_draw_buffers_enable;
 504    bool ARB_draw_buffers_warn;
 505    bool ARB_draw_instanced_enable;
 506    bool ARB_draw_instanced_warn;
 507    bool ARB_enhanced_layouts_enable;
 508    bool ARB_enhanced_layouts_warn;
 509    bool ARB_explicit_attrib_location_enable;
 510    bool ARB_explicit_attrib_location_warn;
 511    bool ARB_explicit_uniform_location_enable;
 512    bool ARB_explicit_uniform_location_warn;
 513    bool ARB_fragment_coord_conventions_enable;
 514    bool ARB_fragment_coord_conventions_warn;
 515    bool ARB_fragment_layer_viewport_enable;
 516    bool ARB_fragment_layer_viewport_warn;
 517    bool ARB_gpu_shader5_enable;
 518    bool ARB_gpu_shader5_warn;
 519    bool ARB_gpu_shader_fp64_enable;
 520    bool ARB_gpu_shader_fp64_warn;
 521    bool ARB_sample_shading_enable;
 522    bool ARB_sample_shading_warn;
 523    bool ARB_separate_shader_objects_enable;
 524    bool ARB_separate_shader_objects_warn;
 525    bool ARB_shader_atomic_counters_enable;
 526    bool ARB_shader_atomic_counters_warn;
 527    bool ARB_shader_bit_encoding_enable;
 528    bool ARB_shader_bit_encoding_warn;
 529    bool ARB_shader_clock_enable;
 530    bool ARB_shader_clock_warn;
 531    bool ARB_shader_image_load_store_enable;
 532    bool ARB_shader_image_load_store_warn;
 533    bool ARB_shader_image_size_enable;
 534    bool ARB_shader_image_size_warn;
 535    bool ARB_shader_precision_enable;
 536    bool ARB_shader_precision_warn;
 537    bool ARB_shader_stencil_export_enable;
 538    bool ARB_shader_stencil_export_warn;
 539    bool ARB_shader_storage_buffer_object_enable;
 540    bool ARB_shader_storage_buffer_object_warn;
 541    bool ARB_shader_subroutine_enable;
 542    bool ARB_shader_subroutine_warn;
 543    bool ARB_shader_texture_image_samples_enable;
 544    bool ARB_shader_texture_image_samples_warn;
 545    bool ARB_shader_texture_lod_enable;
 546    bool ARB_shader_texture_lod_warn;
 547    bool ARB_shading_language_420pack_enable;
 548    bool ARB_shading_language_420pack_warn;
 549    bool ARB_shading_language_packing_enable;
 550    bool ARB_shading_language_packing_warn;
 551    bool ARB_tessellation_shader_enable;
 552    bool ARB_tessellation_shader_warn;
 553    bool ARB_texture_cube_map_array_enable;
 554    bool ARB_texture_cube_map_array_warn;
 555    bool ARB_texture_gather_enable;
 556    bool ARB_texture_gather_warn;
 557    bool ARB_texture_multisample_enable;
 558    bool ARB_texture_multisample_warn;
 559    bool ARB_texture_query_levels_enable;
 560    bool ARB_texture_query_levels_warn;
 561    bool ARB_texture_query_lod_enable;
 562    bool ARB_texture_query_lod_warn;
 563    bool ARB_texture_rectangle_enable;
 564    bool ARB_texture_rectangle_warn;
 565    bool ARB_uniform_buffer_object_enable;
 566    bool ARB_uniform_buffer_object_warn;
 567    bool ARB_vertex_attrib_64bit_enable;
 568    bool ARB_vertex_attrib_64bit_warn;
 569    bool ARB_viewport_array_enable;
 570    bool ARB_viewport_array_warn;
 571
 572    /* KHR extensions go here, sorted alphabetically.
 573     */
 574
 575    /* OES extensions go here, sorted alphabetically.
 576     */
 577    bool OES_EGL_image_external_enable;
 578    bool OES_EGL_image_external_warn;
 579    bool OES_standard_derivatives_enable;
 580    bool OES_standard_derivatives_warn;
 581    bool OES_texture_3D_enable;
 582    bool OES_texture_3D_warn;
 583    bool OES_texture_storage_multisample_2d_array_enable;
 584    bool OES_texture_storage_multisample_2d_array_warn;
 585
 586    /* All other extensions go here, sorted alphabetically.
 587     */
 588    bool AMD_conservative_depth_enable;
 589    bool AMD_conservative_depth_warn;
 590    bool AMD_shader_stencil_export_enable;
 591    bool AMD_shader_stencil_export_warn;
 592    bool AMD_shader_trinary_minmax_enable;
 593    bool AMD_shader_trinary_minmax_warn;
 594    bool AMD_vertex_shader_layer_enable;
 595    bool AMD_vertex_shader_layer_warn;
 596    bool AMD_vertex_shader_viewport_index_enable;
 597    bool AMD_vertex_shader_viewport_index_warn;
 598    bool EXT_draw_buffers_enable;
 599    bool EXT_draw_buffers_warn;
 600    bool EXT_separate_shader_objects_enable;
 601    bool EXT_separate_shader_objects_warn;
 602    bool EXT_shader_integer_mix_enable;
 603    bool EXT_shader_integer_mix_warn;
 604    bool EXT_texture_array_enable;
 605    bool EXT_texture_array_warn;
 606    /*@}*/
 607
 608    /** Extensions supported by the OpenGL implementation. */
 609    const struct gl_extensions *extensions;
 610
 611    bool uses_builtin_functions;
 612    bool fs_uses_gl_fragcoord;
 613
 614    /**
 615     * For geometry shaders, size of the most recently seen input declaration
 616     * that was a sized array, or 0 if no sized input array declarations have
 617     * been seen.
 618     *
 619     * Unused for other shader types.
 620     */
 621    unsigned gs_input_size;
 622
 623    bool fs_early_fragment_tests;
 624
 625    /**
 626     * For tessellation control shaders, size of the most recently seen output
 627     * declaration that was a sized array, or 0 if no sized output array
 628     * declarations have been seen.
 629     *
 630     * Unused for other shader types.
 631     */
 632    unsigned tcs_output_size;
 633
 634    /** Atomic counter offsets by binding */
 635    unsigned atomic_counter_offsets[MAX_COMBINED_ATOMIC_BUFFERS];
 636
 637    bool allow_extension_directive_midshader;
 638
 639    /**
 640     * Known subroutine type declarations.
 641     */
 642    int num_subroutine_types;
 643    ir_function **subroutine_types;
 644
 645    /**
 646     * Functions that are associated with
 647     * subroutine types.
 648     */
 649    int num_subroutines;
 650    ir_function **subroutines;
 651
 652    /**
 653     * field selection temporary parser storage -
 654     * did the parser just parse a dot.
 655     */
 656    bool is_field;
 657 };
 658
 659 # define YYLLOC_DEFAULT(Current, Rhs, N)                        \
 660 do {                                                            \
 661    if (N)                                                       \
 662    {                                                            \
 663       (Current).first_line   = YYRHSLOC(Rhs, 1).first_line;     \
 664       (Current).first_column = YYRHSLOC(Rhs, 1).first_column;   \
 665       (Current).last_line    = YYRHSLOC(Rhs, N).last_line;      \
 666       (Current).last_column  = YYRHSLOC(Rhs, N).last_column;    \
 667    }                                                            \
 668    else                                                         \
 669    {                                                            \
 670       (Current).first_line   = (Current).last_line =            \
 671          YYRHSLOC(Rhs, 0).last_line;                            \
 672       (Current).first_column = (Current).last_column =          \
 673          YYRHSLOC(Rhs, 0).last_column;                          \
 674    }                                                            \
 675    (Current).source = 0;                                        \
 676 } while (0)
 677
 678 /**
 679  * Emit a warning to the shader log
 680  *
 681  * \sa _mesa_glsl_error
 682  */
 683 extern void _mesa_glsl_warning(const YYLTYPE *locp,
 684                                _mesa_glsl_parse_state *state,
 685                                const char *fmt, ...);
 686
 687 extern void _mesa_glsl_lexer_ctor(struct _mesa_glsl_parse_state *state,
 688                                   const char *string);
 689
 690 extern void _mesa_glsl_lexer_dtor(struct _mesa_glsl_parse_state *state);
 691
 692 union YYSTYPE;
 693 extern int _mesa_glsl_lexer_lex(union YYSTYPE *yylval, YYLTYPE *yylloc,
 694                                 void *scanner);
 695
 696 extern int _mesa_glsl_parse(struct _mesa_glsl_parse_state *);
 697
 698 /**
 699  * Process elements of the #extension directive
 700  *
 701  * \return
 702  * If \c name and \c behavior are valid, \c true is returned.  Otherwise
 703  * \c false is returned.
 704  */
 705 extern bool _mesa_glsl_process_extension(const char *name, YYLTYPE *name_locp,
 706                                          const char *behavior,
 707                                          YYLTYPE *behavior_locp,
 708                                          _mesa_glsl_parse_state *state);
 709
 710 #endif /* __cplusplus */
 711
 712
 713 /*
 714  * These definitions apply to C and C++
 715  */
 716 #ifdef __cplusplus
 717 extern "C" {
 718 #endif
 719
 720 /**
 721  * Get the textual name of the specified shader stage (which is a
 722  * gl_shader_stage).
 723  */
 724 extern const char *
 725 _mesa_shader_stage_to_string(unsigned stage);
 726
 727 extern const char *
 728 _mesa_shader_stage_to_abbrev(unsigned stage);
 729
 730 extern int glcpp_preprocess(void *ctx, const char **shader, char **info_log,
 731                       const struct gl_extensions *extensions, struct gl_context *gl_ctx);
 732
 733 extern void _mesa_destroy_shader_compiler(void);
 734 extern void _mesa_destroy_shader_compiler_caches(void);
 735
 736 #ifdef __cplusplus
 737 }
 738 #endif
 739
 740
 741 #endif /* GLSL_PARSER_EXTRAS_H */