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 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 struct _mesa_glsl_parse_state {
  60    _mesa_glsl_parse_state(struct gl_context *_ctx, GLenum target,
  61                           void *mem_ctx);
  62
  63    /* Callers of this ralloc-based new need not call delete. It's
  64     * easier to just ralloc_free 'ctx' (or any of its ancestors). */
  65    static void* operator new(size_t size, void *ctx)
  66    {
  67       void *mem = rzalloc_size(ctx, size);
  68       assert(mem != NULL);
  69
  70       return mem;
  71    }
  72
  73    /* If the user *does* call delete, that's OK, we will just
  74     * ralloc_free in that case. */
  75    static void operator delete(void *mem)
  76    {
  77       ralloc_free(mem);
  78    }
  79
  80    struct gl_context *const ctx;
  81    void *scanner;
  82    exec_list translation_unit;
  83    glsl_symbol_table *symbols;
  84
  85    unsigned num_uniform_blocks;
  86    unsigned uniform_block_array_size;
  87    struct gl_uniform_block *uniform_blocks;
  88
  89    bool es_shader;
  90    unsigned language_version;
  91    const char *version_string;
  92    enum _mesa_glsl_parser_targets target;
  93
  94    /**
  95     * Printable list of GLSL versions supported by the current context
  96     *
  97     * \note
  98     * This string should probably be generated per-context instead of per
  99     * invokation of the compiler.  This should be changed when the method of
 100     * tracking supported GLSL versions changes.
 101     */
 102    const char *supported_version_string;
 103
 104    /**
 105     * Implementation defined limits that affect built-in variables, etc.
 106     *
 107     * \sa struct gl_constants (in mtypes.h)
 108     */
 109    struct {
 110       /* 1.10 */
 111       unsigned MaxLights;
 112       unsigned MaxClipPlanes;
 113       unsigned MaxTextureUnits;
 114       unsigned MaxTextureCoords;
 115       unsigned MaxVertexAttribs;
 116       unsigned MaxVertexUniformComponents;
 117       unsigned MaxVaryingFloats;
 118       unsigned MaxVertexTextureImageUnits;
 119       unsigned MaxCombinedTextureImageUnits;
 120       unsigned MaxTextureImageUnits;
 121       unsigned MaxFragmentUniformComponents;
 122
 123       /* ARB_draw_buffers */
 124       unsigned MaxDrawBuffers;
 125
 126       /**
 127        * Set of GLSL versions supported by the current context
 128        *
 129        * Knowing that version X is supported doesn't mean that versions before
 130        * X are also supported.  Version 1.00 is only supported in an ES2
 131        * context or when GL_ARB_ES2_compatibility is supported.  In an OpenGL
 132        * 3.0 "forward compatible" context, GLSL 1.10 and 1.20 are \b not
 133        * supported.
 134        */
 135       /*@{*/
 136       unsigned GLSL_100ES:1;
 137       unsigned GLSL_110:1;
 138       unsigned GLSL_120:1;
 139       unsigned GLSL_130:1;
 140       unsigned GLSL_140:1;
 141       /*@}*/
 142    } Const;
 143
 144    /**
 145     * During AST to IR conversion, pointer to current IR function
 146     *
 147     * Will be \c NULL whenever the AST to IR conversion is not inside a
 148     * function definition.
 149     */
 150    class ir_function_signature *current_function;
 151
 152    /**
 153     * During AST to IR conversion, pointer to the toplevel IR
 154     * instruction list being generated.
 155     */
 156    exec_list *toplevel_ir;
 157
 158    /** Have we found a return statement in this function? */
 159    bool found_return;
 160
 161    /** Was there an error during compilation? */
 162    bool error;
 163
 164    /**
 165     * Are all shader inputs / outputs invariant?
 166     *
 167     * This is set when the 'STDGL invariant(all)' pragma is used.
 168     */
 169    bool all_invariant;
 170
 171    /** Loop or switch statement containing the current instructions. */
 172    class ast_iteration_statement *loop_nesting_ast;
 173
 174    struct glsl_switch_state switch_state;
 175
 176    /** List of structures defined in user code. */
 177    const glsl_type **user_structures;
 178    unsigned num_user_structures;
 179
 180    char *info_log;
 181
 182    /**
 183     * \name Enable bits for GLSL extensions
 184     */
 185    /*@{*/
 186    bool ARB_draw_buffers_enable;
 187    bool ARB_draw_buffers_warn;
 188    bool ARB_draw_instanced_enable;
 189    bool ARB_draw_instanced_warn;
 190    bool ARB_explicit_attrib_location_enable;
 191    bool ARB_explicit_attrib_location_warn;
 192    bool ARB_fragment_coord_conventions_enable;
 193    bool ARB_fragment_coord_conventions_warn;
 194    bool ARB_texture_rectangle_enable;
 195    bool ARB_texture_rectangle_warn;
 196    bool EXT_texture_array_enable;
 197    bool EXT_texture_array_warn;
 198    bool ARB_shader_texture_lod_enable;
 199    bool ARB_shader_texture_lod_warn;
 200    bool ARB_shader_stencil_export_enable;
 201    bool ARB_shader_stencil_export_warn;
 202    bool AMD_conservative_depth_enable;
 203    bool AMD_conservative_depth_warn;
 204    bool ARB_conservative_depth_enable;
 205    bool ARB_conservative_depth_warn;
 206    bool AMD_shader_stencil_export_enable;
 207    bool AMD_shader_stencil_export_warn;
 208    bool OES_texture_3D_enable;
 209    bool OES_texture_3D_warn;
 210    bool OES_EGL_image_external_enable;
 211    bool OES_EGL_image_external_warn;
 212    bool ARB_shader_bit_encoding_enable;
 213    bool ARB_shader_bit_encoding_warn;
 214    bool ARB_uniform_buffer_object_enable;
 215    bool ARB_uniform_buffer_object_warn;
 216    /*@}*/
 217
 218    /** Extensions supported by the OpenGL implementation. */
 219    const struct gl_extensions *extensions;
 220
 221    /** Shaders containing built-in functions that are used for linking. */
 222    struct gl_shader *builtins_to_link[16];
 223    unsigned num_builtins_to_link;
 224 };
 225
 226 typedef struct YYLTYPE {
 227    int first_line;
 228    int first_column;
 229    int last_line;
 230    int last_column;
 231    unsigned source;
 232 } YYLTYPE;
 233 # define YYLTYPE_IS_DECLARED 1
 234 # define YYLTYPE_IS_TRIVIAL 1
 235
 236 # define YYLLOC_DEFAULT(Current, Rhs, N)                        \
 237 do {                                                            \
 238    if (N)                                                       \
 239    {                                                            \
 240       (Current).first_line   = YYRHSLOC(Rhs, 1).first_line;     \
 241       (Current).first_column = YYRHSLOC(Rhs, 1).first_column;   \
 242       (Current).last_line    = YYRHSLOC(Rhs, N).last_line;      \
 243       (Current).last_column  = YYRHSLOC(Rhs, N).last_column;    \
 244    }                                                            \
 245    else                                                         \
 246    {                                                            \
 247       (Current).first_line   = (Current).last_line =            \
 248          YYRHSLOC(Rhs, 0).last_line;                            \
 249       (Current).first_column = (Current).last_column =          \
 250          YYRHSLOC(Rhs, 0).last_column;                          \
 251    }                                                            \
 252    (Current).source = 0;                                        \
 253 } while (0)
 254
 255 extern void _mesa_glsl_error(YYLTYPE *locp, _mesa_glsl_parse_state *state,
 256                              const char *fmt, ...);
 257
 258 /**
 259  * Emit a warning to the shader log
 260  *
 261  * \sa _mesa_glsl_error
 262  */
 263 extern void _mesa_glsl_warning(const YYLTYPE *locp,
 264                                _mesa_glsl_parse_state *state,
 265                                const char *fmt, ...);
 266
 267 extern void _mesa_glsl_lexer_ctor(struct _mesa_glsl_parse_state *state,
 268                                   const char *string);
 269
 270 extern void _mesa_glsl_lexer_dtor(struct _mesa_glsl_parse_state *state);
 271
 272 union YYSTYPE;
 273 extern int _mesa_glsl_lex(union YYSTYPE *yylval, YYLTYPE *yylloc,
 274                           void *scanner);
 275
 276 extern int _mesa_glsl_parse(struct _mesa_glsl_parse_state *);
 277
 278 /**
 279  * Process elements of the #extension directive
 280  *
 281  * \return
 282  * If \c name and \c behavior are valid, \c true is returned.  Otherwise
 283  * \c false is returned.
 284  */
 285 extern bool _mesa_glsl_process_extension(const char *name, YYLTYPE *name_locp,
 286                                          const char *behavior,
 287                                          YYLTYPE *behavior_locp,
 288                                          _mesa_glsl_parse_state *state);
 289
 290 /**
 291  * Get the textual name of the specified shader target
 292  */
 293 extern const char *
 294 _mesa_glsl_shader_target_name(enum _mesa_glsl_parser_targets target);
 295
 296
 297 #endif /* __cplusplus */
 298
 299
 300 /*
 301  * These definitions apply to C and C++
 302  */
 303 #ifdef __cplusplus
 304 extern "C" {
 305 #endif
 306
 307 extern int preprocess(void *ctx, const char **shader, char **info_log,
 308                       const struct gl_extensions *extensions, int api);
 309
 310 extern void _mesa_destroy_shader_compiler(void);
 311 extern void _mesa_destroy_shader_compiler_caches(void);
 312
 313 #ifdef __cplusplus
 314 }
 315 #endif
 316
 317
 318 #endif /* GLSL_PARSER_EXTRAS_H */