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 #include <cstdlib>
  29 #include "glsl_symbol_table.h"
  30
  31 enum _mesa_glsl_parser_targets {
  32    vertex_shader,
  33    geometry_shader,
  34    fragment_shader,
  35    ir_shader
  36 };
  37
  38 struct _mesa_glsl_parse_state {
  39    void *scanner;
  40    exec_list translation_unit;
  41    glsl_symbol_table *symbols;
  42
  43    unsigned language_version;
  44    enum _mesa_glsl_parser_targets target;
  45
  46    /**
  47     * Implementation defined limits that affect built-in variables, etc.
  48     *
  49     * \sa struct gl_constants (in mtypes.h)
  50     */
  51    struct {
  52       unsigned MaxDrawBuffers;
  53       unsigned MaxTextureCoords;
  54    } Const;
  55
  56    /**
  57     * During AST to IR conversion, pointer to current IR function
  58     *
  59     * Will be \c NULL whenever the AST to IR conversion is not inside a
  60     * function definition.
  61     */
  62    class ir_function_signature *current_function;
  63
  64    /** Have we found a return statement in this function? */
  65    bool found_return;
  66
  67    /** Was there an error during compilation? */
  68    bool error;
  69
  70    /** Index of last generated anonymous temporary. */
  71    unsigned temp_index;
  72
  73    /** Loop or switch statement containing the current instructions. */
  74    class ir_instruction *loop_or_switch_nesting;
  75
  76    /** List of structures defined in user code. */
  77    const glsl_type **user_structures;
  78    unsigned num_user_structures;
  79
  80    char *info_log;
  81
  82    /**
  83     * \name Enable bits for GLSL extensions
  84     */
  85    /*@{*/
  86    unsigned ARB_draw_buffers_enable:1;
  87    unsigned ARB_draw_buffers_warn:1;
  88    unsigned ARB_texture_rectangle_enable:1;
  89    unsigned ARB_texture_rectangle_warn:1;
  90    unsigned EXT_texture_array_enable:1;
  91    unsigned EXT_texture_array_warn:1;
  92    /*@}*/
  93 };
  94
  95 typedef struct YYLTYPE {
  96    int first_line;
  97    int first_column;
  98    int last_line;
  99    int last_column;
 100    unsigned source;
 101 } YYLTYPE;
 102 # define YYLTYPE_IS_DECLARED 1
 103 # define YYLTYPE_IS_TRIVIAL 1
 104
 105 extern void _mesa_glsl_error(YYLTYPE *locp, _mesa_glsl_parse_state *state,
 106                              const char *fmt, ...);
 107
 108 /**
 109  * Emit a warning to the shader log
 110  *
 111  * \sa _mesa_glsl_error
 112  */
 113 extern void _mesa_glsl_warning(const YYLTYPE *locp,
 114                                _mesa_glsl_parse_state *state,
 115                                const char *fmt, ...);
 116
 117 extern "C" {
 118 extern int preprocess(void *ctx, const char **shader, char **info_log,
 119                       const struct gl_extensions *extensions);
 120 }
 121
 122 extern void _mesa_glsl_lexer_ctor(struct _mesa_glsl_parse_state *state,
 123                                   const char *string);
 124
 125 extern void _mesa_glsl_lexer_dtor(struct _mesa_glsl_parse_state *state);
 126
 127 union YYSTYPE;
 128 extern int _mesa_glsl_lex(union YYSTYPE *yylval, YYLTYPE *yylloc,
 129                           void *scanner);
 130
 131 extern int _mesa_glsl_parse(struct _mesa_glsl_parse_state *);
 132
 133 /**
 134  * Process elements of the #extension directive
 135  *
 136  * \return
 137  * If \c name and \c behavior are valid, \c true is returned.  Otherwise
 138  * \c false is returned.
 139  */
 140 extern bool _mesa_glsl_process_extension(const char *name, YYLTYPE *name_locp,
 141                                          const char *behavior,
 142                                          YYLTYPE *behavior_locp,
 143                                          _mesa_glsl_parse_state *state);
 144
 145 /**
 146  * Get the textual name of the specified shader target
 147  */
 148 extern const char *
 149 _mesa_glsl_shader_target_name(enum _mesa_glsl_parser_targets target);
 150
 151 void do_ir_to_mesa(exec_list *instructions);
 152
 153 #endif /* GLSL_PARSER_EXTRAS_H */