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