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       /* 1.10 */
  53       unsigned MaxLights;
  54       unsigned MaxClipPlanes;
  55       unsigned MaxTextureUnits;
  56       unsigned MaxTextureCoords;
  57       unsigned MaxVertexAttribs;
  58       unsigned MaxVertexUniformComponents;
  59       unsigned MaxVaryingFloats;
  60       unsigned MaxVertexTextureImageUnits;
  61       unsigned MaxCombinedTextureImageUnits;
  62       unsigned MaxTextureImageUnits;
  63       unsigned MaxFragmentUniformComponents;
  64
  65       /* ARB_draw_buffers */
  66       unsigned MaxDrawBuffers;
  67    } Const;
  68
  69    /**
  70     * During AST to IR conversion, pointer to current IR function
  71     *
  72     * Will be \c NULL whenever the AST to IR conversion is not inside a
  73     * function definition.
  74     */
  75    class ir_function_signature *current_function;
  76
  77    /** Have we found a return statement in this function? */
  78    bool found_return;
  79
  80    /** Was there an error during compilation? */
  81    bool error;
  82
  83    /** Loop or switch statement containing the current instructions. */
  84    class ir_instruction *loop_or_switch_nesting;
  85
  86    /** List of structures defined in user code. */
  87    const glsl_type **user_structures;
  88    unsigned num_user_structures;
  89
  90    char *info_log;
  91
  92    /**
  93     * \name Enable bits for GLSL extensions
  94     */
  95    /*@{*/
  96    unsigned ARB_draw_buffers_enable:1;
  97    unsigned ARB_draw_buffers_warn:1;
  98    unsigned ARB_texture_rectangle_enable:1;
  99    unsigned ARB_texture_rectangle_warn:1;
 100    unsigned EXT_texture_array_enable:1;
 101    unsigned EXT_texture_array_warn:1;
 102    /*@}*/
 103
 104    /** Extensions supported by the OpenGL implementation. */
 105    const struct gl_extensions *extensions;
 106 };
 107
 108 typedef struct YYLTYPE {
 109    int first_line;
 110    int first_column;
 111    int last_line;
 112    int last_column;
 113    unsigned source;
 114 } YYLTYPE;
 115 # define YYLTYPE_IS_DECLARED 1
 116 # define YYLTYPE_IS_TRIVIAL 1
 117
 118 extern void _mesa_glsl_error(YYLTYPE *locp, _mesa_glsl_parse_state *state,
 119                              const char *fmt, ...);
 120
 121 /**
 122  * Emit a warning to the shader log
 123  *
 124  * \sa _mesa_glsl_error
 125  */
 126 extern void _mesa_glsl_warning(const YYLTYPE *locp,
 127                                _mesa_glsl_parse_state *state,
 128                                const char *fmt, ...);
 129
 130 extern "C" {
 131 extern int preprocess(void *ctx, const char **shader, char **info_log,
 132                       const struct gl_extensions *extensions);
 133 }
 134
 135 extern void _mesa_glsl_lexer_ctor(struct _mesa_glsl_parse_state *state,
 136                                   const char *string);
 137
 138 extern void _mesa_glsl_lexer_dtor(struct _mesa_glsl_parse_state *state);
 139
 140 union YYSTYPE;
 141 extern int _mesa_glsl_lex(union YYSTYPE *yylval, YYLTYPE *yylloc,
 142                           void *scanner);
 143
 144 extern int _mesa_glsl_parse(struct _mesa_glsl_parse_state *);
 145
 146 /**
 147  * Process elements of the #extension directive
 148  *
 149  * \return
 150  * If \c name and \c behavior are valid, \c true is returned.  Otherwise
 151  * \c false is returned.
 152  */
 153 extern bool _mesa_glsl_process_extension(const char *name, YYLTYPE *name_locp,
 154                                          const char *behavior,
 155                                          YYLTYPE *behavior_locp,
 156                                          _mesa_glsl_parse_state *state);
 157
 158 /**
 159  * Get the textual name of the specified shader target
 160  */
 161 extern const char *
 162 _mesa_glsl_shader_target_name(enum _mesa_glsl_parser_targets target);
 163
 164 void do_ir_to_mesa(exec_list *instructions);
 165
 166 #endif /* GLSL_PARSER_EXTRAS_H */