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