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  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. enum _mesa_glsl_parser_targets {
  38.    vertex_shader,
  39.    geometry_shader,
  40.    fragment_shader
  41. };
  42.  
  43. struct gl_context;
  44.  
  45. struct glsl_switch_state {
  46.    /** Temporary variables needed for switch statement. */
  47.    ir_variable *test_var;
  48.    ir_variable *is_fallthru_var;
  49.    ir_variable *is_break_var;
  50.    class ast_switch_statement *switch_nesting_ast;
  51.  
  52.    /** Table of constant values already used in case labels */
  53.    struct hash_table *labels_ht;
  54.    class ast_case_label *previous_default;
  55.  
  56.    bool is_switch_innermost; // if switch stmt is closest to break, ...
  57. };
  58.  
  59. const char *
  60. glsl_compute_version_string(void *mem_ctx, bool is_es, unsigned version);
  61.  
  62. typedef struct YYLTYPE {
  63.    int first_line;
  64.    int first_column;
  65.    int last_line;
  66.    int last_column;
  67.    unsigned source;
  68. } YYLTYPE;
  69. # define YYLTYPE_IS_DECLARED 1
  70. # define YYLTYPE_IS_TRIVIAL 1
  71.  
  72. struct _mesa_glsl_parse_state {
  73.    _mesa_glsl_parse_state(struct gl_context *_ctx, GLenum target,
  74.                           void *mem_ctx);
  75.  
  76.    /* Callers of this ralloc-based new need not call delete. It's
  77.     * easier to just ralloc_free 'ctx' (or any of its ancestors). */
  78.    static void* operator new(size_t size, void *ctx)
  79.    {
  80.       void *mem = rzalloc_size(ctx, size);
  81.       assert(mem != NULL);
  82.  
  83.       return mem;
  84.    }
  85.  
  86.    /* If the user *does* call delete, that's OK, we will just
  87.     * ralloc_free in that case. */
  88.    static void operator delete(void *mem)
  89.    {
  90.       ralloc_free(mem);
  91.    }
  92.  
  93.    /**
  94.     * Generate a string representing the GLSL version currently being compiled
  95.     * (useful for error messages).
  96.     */
  97.    const char *get_version_string()
  98.    {
  99.       return glsl_compute_version_string(this, this->es_shader,
  100.                                          this->language_version);
  101.    }
  102.  
  103.    /**
  104.     * Determine whether the current GLSL version is sufficiently high to
  105.     * support a certain feature.
  106.     *
  107.     * \param required_glsl_version is the desktop GLSL version that is
  108.     * required to support the feature, or 0 if no version of desktop GLSL
  109.     * supports the feature.
  110.     *
  111.     * \param required_glsl_es_version is the GLSL ES version that is required
  112.     * to support the feature, or 0 if no version of GLSL ES suports the
  113.     * feature.
  114.     */
  115.    bool is_version(unsigned required_glsl_version,
  116.                    unsigned required_glsl_es_version)
  117.    {
  118.       unsigned required_version = this->es_shader ?
  119.          required_glsl_es_version : required_glsl_version;
  120.       return required_version != 0
  121.          && this->language_version >= required_version;
  122.    }
  123.  
  124.    bool check_version(unsigned required_glsl_version,
  125.                       unsigned required_glsl_es_version,
  126.                       YYLTYPE *locp, const char *fmt, ...) PRINTFLIKE(5, 6);
  127.  
  128.    bool check_precision_qualifiers_allowed(YYLTYPE *locp)
  129.    {
  130.       return check_version(130, 100, locp,
  131.                            "precision qualifiers are forbidden");
  132.    }
  133.  
  134.    bool check_bitwise_operations_allowed(YYLTYPE *locp)
  135.    {
  136.       return check_version(130, 300, locp, "bit-wise operations are forbidden");
  137.    }
  138.  
  139.    void process_version_directive(YYLTYPE *locp, int version,
  140.                                   const char *ident);
  141.  
  142.    struct gl_context *const ctx;
  143.    void *scanner;
  144.    exec_list translation_unit;
  145.    glsl_symbol_table *symbols;
  146.  
  147.    unsigned num_uniform_blocks;
  148.    unsigned uniform_block_array_size;
  149.    struct gl_uniform_block *uniform_blocks;
  150.  
  151.    unsigned num_supported_versions;
  152.    struct {
  153.       unsigned ver;
  154.       bool es;
  155.    } supported_versions[12];
  156.  
  157.    bool es_shader;
  158.    unsigned language_version;
  159.    enum _mesa_glsl_parser_targets target;
  160.  
  161.    /**
  162.     * Number of nested struct_specifier levels
  163.     *
  164.     * Outside a struct_specifer, this is zero.
  165.     */
  166.    unsigned struct_specifier_depth;
  167.  
  168.    /**
  169.     * Default uniform layout qualifiers tracked during parsing.
  170.     * Currently affects uniform blocks and uniform buffer variables in
  171.     * those blocks.
  172.     */
  173.    struct ast_type_qualifier *default_uniform_qualifier;
  174.  
  175.    /**
  176.     * Printable list of GLSL versions supported by the current context
  177.     *
  178.     * \note
  179.     * This string should probably be generated per-context instead of per
  180.     * invokation of the compiler.  This should be changed when the method of
  181.     * tracking supported GLSL versions changes.
  182.     */
  183.    const char *supported_version_string;
  184.  
  185.    /**
  186.     * Implementation defined limits that affect built-in variables, etc.
  187.     *
  188.     * \sa struct gl_constants (in mtypes.h)
  189.     */
  190.    struct {
  191.       /* 1.10 */
  192.       unsigned MaxLights;
  193.       unsigned MaxClipPlanes;
  194.       unsigned MaxTextureUnits;
  195.       unsigned MaxTextureCoords;
  196.       unsigned MaxVertexAttribs;
  197.       unsigned MaxVertexUniformComponents;
  198.       unsigned MaxVaryingFloats;
  199.       unsigned MaxVertexTextureImageUnits;
  200.       unsigned MaxCombinedTextureImageUnits;
  201.       unsigned MaxTextureImageUnits;
  202.       unsigned MaxFragmentUniformComponents;
  203.  
  204.       /* ARB_draw_buffers */
  205.       unsigned MaxDrawBuffers;
  206.  
  207.       /* 3.00 ES */
  208.       int MinProgramTexelOffset;
  209.       int MaxProgramTexelOffset;
  210.    } Const;
  211.  
  212.    /**
  213.     * During AST to IR conversion, pointer to current IR function
  214.     *
  215.     * Will be \c NULL whenever the AST to IR conversion is not inside a
  216.     * function definition.
  217.     */
  218.    class ir_function_signature *current_function;
  219.  
  220.    /**
  221.     * During AST to IR conversion, pointer to the toplevel IR
  222.     * instruction list being generated.
  223.     */
  224.    exec_list *toplevel_ir;
  225.  
  226.    /** Have we found a return statement in this function? */
  227.    bool found_return;
  228.  
  229.    /** Was there an error during compilation? */
  230.    bool error;
  231.  
  232.    /**
  233.     * Are all shader inputs / outputs invariant?
  234.     *
  235.     * This is set when the 'STDGL invariant(all)' pragma is used.
  236.     */
  237.    bool all_invariant;
  238.  
  239.    /** Loop or switch statement containing the current instructions. */
  240.    class ast_iteration_statement *loop_nesting_ast;
  241.  
  242.    struct glsl_switch_state switch_state;
  243.  
  244.    /** List of structures defined in user code. */
  245.    const glsl_type **user_structures;
  246.    unsigned num_user_structures;
  247.  
  248.    char *info_log;
  249.  
  250.    /**
  251.     * \name Enable bits for GLSL extensions
  252.     */
  253.    /*@{*/
  254.    bool ARB_draw_buffers_enable;
  255.    bool ARB_draw_buffers_warn;
  256.    bool ARB_draw_instanced_enable;
  257.    bool ARB_draw_instanced_warn;
  258.    bool ARB_explicit_attrib_location_enable;
  259.    bool ARB_explicit_attrib_location_warn;
  260.    bool ARB_fragment_coord_conventions_enable;
  261.    bool ARB_fragment_coord_conventions_warn;
  262.    bool ARB_texture_rectangle_enable;
  263.    bool ARB_texture_rectangle_warn;
  264.    bool EXT_texture_array_enable;
  265.    bool EXT_texture_array_warn;
  266.    bool ARB_shader_texture_lod_enable;
  267.    bool ARB_shader_texture_lod_warn;
  268.    bool ARB_shader_stencil_export_enable;
  269.    bool ARB_shader_stencil_export_warn;
  270.    bool AMD_conservative_depth_enable;
  271.    bool AMD_conservative_depth_warn;
  272.    bool ARB_conservative_depth_enable;
  273.    bool ARB_conservative_depth_warn;
  274.    bool AMD_shader_stencil_export_enable;
  275.    bool AMD_shader_stencil_export_warn;
  276.    bool OES_texture_3D_enable;
  277.    bool OES_texture_3D_warn;
  278.    bool OES_EGL_image_external_enable;
  279.    bool OES_EGL_image_external_warn;
  280.    bool ARB_shader_bit_encoding_enable;
  281.    bool ARB_shader_bit_encoding_warn;
  282.    bool ARB_uniform_buffer_object_enable;
  283.    bool ARB_uniform_buffer_object_warn;
  284.    bool OES_standard_derivatives_enable;
  285.    bool OES_standard_derivatives_warn;
  286.    bool ARB_texture_cube_map_array_enable;
  287.    bool ARB_texture_cube_map_array_warn;
  288.    bool ARB_shading_language_packing_enable;
  289.    bool ARB_shading_language_packing_warn;
  290.    bool ARB_texture_multisample_enable;
  291.    bool ARB_texture_multisample_warn;
  292.    bool ARB_texture_query_lod_enable;
  293.    bool ARB_texture_query_lod_warn;
  294.    bool ARB_gpu_shader5_enable;
  295.    bool ARB_gpu_shader5_warn;
  296.    bool AMD_vertex_shader_layer_enable;
  297.    bool AMD_vertex_shader_layer_warn;
  298.    bool ARB_shading_language_420pack_enable;
  299.    bool ARB_shading_language_420pack_warn;
  300.    /*@}*/
  301.  
  302.    /** Extensions supported by the OpenGL implementation. */
  303.    const struct gl_extensions *extensions;
  304.  
  305.    /** Shaders containing built-in functions that are used for linking. */
  306.    struct gl_shader *builtins_to_link[16];
  307.    unsigned num_builtins_to_link;
  308. };
  309.  
  310. # define YYLLOC_DEFAULT(Current, Rhs, N)                        \
  311. do {                                                            \
  312.    if (N)                                                       \
  313.    {                                                            \
  314.       (Current).first_line   = YYRHSLOC(Rhs, 1).first_line;     \
  315.       (Current).first_column = YYRHSLOC(Rhs, 1).first_column;   \
  316.       (Current).last_line    = YYRHSLOC(Rhs, N).last_line;      \
  317.       (Current).last_column  = YYRHSLOC(Rhs, N).last_column;    \
  318.    }                                                            \
  319.    else                                                         \
  320.    {                                                            \
  321.       (Current).first_line   = (Current).last_line =            \
  322.          YYRHSLOC(Rhs, 0).last_line;                            \
  323.       (Current).first_column = (Current).last_column =          \
  324.          YYRHSLOC(Rhs, 0).last_column;                          \
  325.    }                                                            \
  326.    (Current).source = 0;                                        \
  327. } while (0)
  328.  
  329. extern void _mesa_glsl_error(YYLTYPE *locp, _mesa_glsl_parse_state *state,
  330.                              const char *fmt, ...);
  331.  
  332. /**
  333.  * Emit a warning to the shader log
  334.  *
  335.  * \sa _mesa_glsl_error
  336.  */
  337. extern void _mesa_glsl_warning(const YYLTYPE *locp,
  338.                                _mesa_glsl_parse_state *state,
  339.                                const char *fmt, ...);
  340.  
  341. extern void _mesa_glsl_lexer_ctor(struct _mesa_glsl_parse_state *state,
  342.                                   const char *string);
  343.  
  344. extern void _mesa_glsl_lexer_dtor(struct _mesa_glsl_parse_state *state);
  345.  
  346. union YYSTYPE;
  347. extern int _mesa_glsl_lexer_lex(union YYSTYPE *yylval, YYLTYPE *yylloc,
  348.                                 void *scanner);
  349.  
  350. extern int _mesa_glsl_parse(struct _mesa_glsl_parse_state *);
  351.  
  352. /**
  353.  * Process elements of the #extension directive
  354.  *
  355.  * \return
  356.  * If \c name and \c behavior are valid, \c true is returned.  Otherwise
  357.  * \c false is returned.
  358.  */
  359. extern bool _mesa_glsl_process_extension(const char *name, YYLTYPE *name_locp,
  360.                                          const char *behavior,
  361.                                          YYLTYPE *behavior_locp,
  362.                                          _mesa_glsl_parse_state *state);
  363.  
  364. /**
  365.  * Get the textual name of the specified shader target
  366.  */
  367. extern const char *
  368. _mesa_glsl_shader_target_name(enum _mesa_glsl_parser_targets target);
  369.  
  370.  
  371. #endif /* __cplusplus */
  372.  
  373.  
  374. /*
  375.  * These definitions apply to C and C++
  376.  */
  377. #ifdef __cplusplus
  378. extern "C" {
  379. #endif
  380.  
  381. extern const char *
  382. _mesa_glsl_shader_target_name(GLenum type);
  383.  
  384. extern int glcpp_preprocess(void *ctx, const char **shader, char **info_log,
  385.                       const struct gl_extensions *extensions, struct gl_context *gl_ctx);
  386.  
  387. extern void _mesa_destroy_shader_compiler(void);
  388. extern void _mesa_destroy_shader_compiler_caches(void);
  389.  
  390. #ifdef __cplusplus
  391. }
  392. #endif
  393.  
  394.  
  395. #endif /* GLSL_PARSER_EXTRAS_H */
  396.