src/glsl/glsl_types.h

   1 /* -*- c++ -*- */
   2 /*
   3  * Copyright © 2009 Intel Corporation
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a
   6  * copy of this software and associated documentation files (the "Software"),
   7  * to deal in the Software without restriction, including without limitation
   8  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   9  * and/or sell copies of the Software, and to permit persons to whom the
  10  * Software is furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice (including the next
  13  * paragraph) shall be included in all copies or substantial portions of the
  14  * Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  21  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  22  * DEALINGS IN THE SOFTWARE.
  23  */
  24
  25 #pragma once
  26 #ifndef GLSL_TYPES_H
  27 #define GLSL_TYPES_H
  28
  29 #include <string.h>
  30 #include <assert.h>
  31
  32 #ifdef __cplusplus
  33 extern "C" {
  34 #endif
  35
  36 struct _mesa_glsl_parse_state;
  37 struct glsl_symbol_table;
  38
  39 extern void
  40 _mesa_glsl_initialize_types(struct _mesa_glsl_parse_state *state);
  41
  42 extern void
  43 _mesa_glsl_release_types(void);
  44
  45 #ifdef __cplusplus
  46 }
  47 #endif
  48
  49 enum glsl_base_type {
  50    GLSL_TYPE_UINT = 0,
  51    GLSL_TYPE_INT,
  52    GLSL_TYPE_FLOAT,
  53    GLSL_TYPE_DOUBLE,
  54    GLSL_TYPE_BOOL,
  55    GLSL_TYPE_SAMPLER,
  56    GLSL_TYPE_IMAGE,
  57    GLSL_TYPE_ATOMIC_UINT,
  58    GLSL_TYPE_STRUCT,
  59    GLSL_TYPE_INTERFACE,
  60    GLSL_TYPE_ARRAY,
  61    GLSL_TYPE_VOID,
  62    GLSL_TYPE_ERROR
  63 };
  64
  65 enum glsl_sampler_dim {
  66    GLSL_SAMPLER_DIM_1D = 0,
  67    GLSL_SAMPLER_DIM_2D,
  68    GLSL_SAMPLER_DIM_3D,
  69    GLSL_SAMPLER_DIM_CUBE,
  70    GLSL_SAMPLER_DIM_RECT,
  71    GLSL_SAMPLER_DIM_BUF,
  72    GLSL_SAMPLER_DIM_EXTERNAL,
  73    GLSL_SAMPLER_DIM_MS
  74 };
  75
  76 enum glsl_interface_packing {
  77    GLSL_INTERFACE_PACKING_STD140,
  78    GLSL_INTERFACE_PACKING_SHARED,
  79    GLSL_INTERFACE_PACKING_PACKED
  80 };
  81
  82 enum glsl_matrix_layout {
  83    /**
  84     * The layout of the matrix is inherited from the object containing the
  85     * matrix (the top level structure or the uniform block).
  86     */
  87    GLSL_MATRIX_LAYOUT_INHERITED,
  88
  89    /**
  90     * Explicit column-major layout
  91     *
  92     * If a uniform block doesn't have an explicit layout set, it will default
  93     * to this layout.
  94     */
  95    GLSL_MATRIX_LAYOUT_COLUMN_MAJOR,
  96
  97    /**
  98     * Row-major layout
  99     */
 100    GLSL_MATRIX_LAYOUT_ROW_MAJOR
 101 };
 102
 103 #ifdef __cplusplus
 104 #include "GL/gl.h"
 105 #include "util/ralloc.h"
 106 #include "main/mtypes.h" /* for gl_texture_index, C++'s enum rules are broken */
 107
 108 struct glsl_type {
 109    GLenum gl_type;
 110    glsl_base_type base_type;
 111
 112    unsigned sampler_dimensionality:3; /**< \see glsl_sampler_dim */
 113    unsigned sampler_shadow:1;
 114    unsigned sampler_array:1;
 115    unsigned sampler_type:2;    /**< Type of data returned using this
 116                                 * sampler or image.  Only \c
 117                                 * GLSL_TYPE_FLOAT, \c GLSL_TYPE_INT,
 118                                 * and \c GLSL_TYPE_UINT are valid.
 119                                 */
 120    unsigned interface_packing:2;
 121
 122    /* Callers of this ralloc-based new need not call delete. It's
 123     * easier to just ralloc_free 'mem_ctx' (or any of its ancestors). */
 124    static void* operator new(size_t size)
 125    {
 126       mtx_lock(&glsl_type::mutex);
 127
 128       /* mem_ctx should have been created by the static members */
 129       assert(glsl_type::mem_ctx != NULL);
 130
 131       void *type;
 132
 133       type = ralloc_size(glsl_type::mem_ctx, size);
 134       assert(type != NULL);
 135
 136       mtx_unlock(&glsl_type::mutex);
 137
 138       return type;
 139    }
 140
 141    /* If the user *does* call delete, that's OK, we will just
 142     * ralloc_free in that case. */
 143    static void operator delete(void *type)
 144    {
 145       mtx_lock(&glsl_type::mutex);
 146       ralloc_free(type);
 147       mtx_unlock(&glsl_type::mutex);
 148    }
 149
 150    /**
 151     * \name Vector and matrix element counts
 152     *
 153     * For scalars, each of these values will be 1.  For non-numeric types
 154     * these will be 0.
 155     */
 156    /*@{*/
 157    uint8_t vector_elements;    /**< 1, 2, 3, or 4 vector elements. */
 158    uint8_t matrix_columns;     /**< 1, 2, 3, or 4 matrix columns. */
 159    /*@}*/
 160
 161    /**
 162     * For \c GLSL_TYPE_ARRAY, this is the length of the array.  For
 163     * \c GLSL_TYPE_STRUCT or \c GLSL_TYPE_INTERFACE, it is the number of
 164     * elements in the structure and the number of values pointed to by
 165     * \c fields.structure (below).
 166     */
 167    unsigned length;
 168
 169    /**
 170     * Name of the data type
 171     *
 172     * Will never be \c NULL.
 173     */
 174    const char *name;
 175
 176    /**
 177     * Subtype of composite data types.
 178     */
 179    union {
 180       const struct glsl_type *array;            /**< Type of array elements. */
 181       const struct glsl_type *parameters;       /**< Parameters to function. */
 182       struct glsl_struct_field *structure;      /**< List of struct fields. */
 183    } fields;
 184
 185    /**
 186     * \name Pointers to various public type singletons
 187     */
 188    /*@{*/
 189 #undef  DECL_TYPE
 190 #define DECL_TYPE(NAME, ...) \
 191    static const glsl_type *const NAME##_type;
 192 #undef  STRUCT_TYPE
 193 #define STRUCT_TYPE(NAME) \
 194    static const glsl_type *const struct_##NAME##_type;
 195 #include "builtin_type_macros.h"
 196    /*@}*/
 197
 198    /**
 199     * Convenience accessors for vector types (shorter than get_instance()).
 200     * @{
 201     */
 202    static const glsl_type *vec(unsigned components);
 203    static const glsl_type *dvec(unsigned components);
 204    static const glsl_type *ivec(unsigned components);
 205    static const glsl_type *uvec(unsigned components);
 206    static const glsl_type *bvec(unsigned components);
 207    /**@}*/
 208
 209    /**
 210     * For numeric and boolean derived types returns the basic scalar type
 211     *
 212     * If the type is a numeric or boolean scalar, vector, or matrix type,
 213     * this function gets the scalar type of the individual components.  For
 214     * all other types, including arrays of numeric or boolean types, the
 215     * error type is returned.
 216     */
 217    const glsl_type *get_base_type() const;
 218
 219    /**
 220     * Get the basic scalar type which this type aggregates.
 221     *
 222     * If the type is a numeric or boolean scalar, vector, or matrix, or an
 223     * array of any of those, this function gets the scalar type of the
 224     * individual components.  For structs and arrays of structs, this function
 225     * returns the struct type.  For samplers and arrays of samplers, this
 226     * function returns the sampler type.
 227     */
 228    const glsl_type *get_scalar_type() const;
 229
 230    /**
 231     * Get the instance of a built-in scalar, vector, or matrix type
 232     */
 233    static const glsl_type *get_instance(unsigned base_type, unsigned rows,
 234                                         unsigned columns);
 235
 236    /**
 237     * Get the instance of a sampler type
 238     */
 239    static const glsl_type *get_sampler_instance(enum glsl_sampler_dim dim,
 240                                                 bool shadow,
 241                                                 bool array,
 242                                                 glsl_base_type type);
 243
 244
 245    /**
 246     * Get the instance of an array type
 247     */
 248    static const glsl_type *get_array_instance(const glsl_type *base,
 249                                               unsigned elements);
 250
 251    /**
 252     * Get the instance of a record type
 253     */
 254    static const glsl_type *get_record_instance(const glsl_struct_field *fields,
 255                                                unsigned num_fields,
 256                                                const char *name);
 257
 258    /**
 259     * Get the instance of an interface block type
 260     */
 261    static const glsl_type *get_interface_instance(const glsl_struct_field *fields,
 262                                                   unsigned num_fields,
 263                                                   enum glsl_interface_packing packing,
 264                                                   const char *block_name);
 265
 266    /**
 267     * Get the type resulting from a multiplication of \p type_a * \p type_b
 268     */
 269    static const glsl_type *get_mul_type(const glsl_type *type_a,
 270                                         const glsl_type *type_b);
 271
 272    /**
 273     * Query the total number of scalars that make up a scalar, vector or matrix
 274     */
 275    unsigned components() const
 276    {
 277       return vector_elements * matrix_columns;
 278    }
 279
 280    /**
 281     * Calculate the number of components slots required to hold this type
 282     *
 283     * This is used to determine how many uniform or varying locations a type
 284     * might occupy.
 285     */
 286    unsigned component_slots() const;
 287
 288    /**
 289     * Calculate the number of unique values from glGetUniformLocation for the
 290     * elements of the type.
 291     *
 292     * This is used to allocate slots in the UniformRemapTable, the amount of
 293     * locations may not match with actual used storage space by the driver.
 294     */
 295    unsigned uniform_locations() const;
 296
 297    /**
 298     * Calculate the number of attribute slots required to hold this type
 299     *
 300     * This implements the language rules of GLSL 1.50 for counting the number
 301     * of slots used by a vertex attribute.  It also determines the number of
 302     * varying slots the type will use up in the absence of varying packing
 303     * (and thus, it can be used to measure the number of varying slots used by
 304     * the varyings that are generated by lower_packed_varyings).
 305     */
 306    unsigned count_attribute_slots() const;
 307
 308
 309    /**
 310     * Alignment in bytes of the start of this type in a std140 uniform
 311     * block.
 312     */
 313    unsigned std140_base_alignment(bool row_major) const;
 314
 315    /** Size in bytes of this type in a std140 uniform block.
 316     *
 317     * Note that this is not GL_UNIFORM_SIZE (which is the number of
 318     * elements in the array)
 319     */
 320    unsigned std140_size(bool row_major) const;
 321
 322    /**
 323     * \brief Can this type be implicitly converted to another?
 324     *
 325     * \return True if the types are identical or if this type can be converted
 326     *         to \c desired according to Section 4.1.10 of the GLSL spec.
 327     *
 328     * \verbatim
 329     * From page 25 (31 of the pdf) of the GLSL 1.50 spec, Section 4.1.10
 330     * Implicit Conversions:
 331     *
 332     *     In some situations, an expression and its type will be implicitly
 333     *     converted to a different type. The following table shows all allowed
 334     *     implicit conversions:
 335     *
 336     *     Type of expression | Can be implicitly converted to
 337     *     --------------------------------------------------
 338     *     int                  float
 339     *     uint
 340     *
 341     *     ivec2                vec2
 342     *     uvec2
 343     *
 344     *     ivec3                vec3
 345     *     uvec3
 346     *
 347     *     ivec4                vec4
 348     *     uvec4
 349     *
 350     *     There are no implicit array or structure conversions. For example,
 351     *     an array of int cannot be implicitly converted to an array of float.
 352     *     There are no implicit conversions between signed and unsigned
 353     *     integers.
 354     * \endverbatim
 355     */
 356    bool can_implicitly_convert_to(const glsl_type *desired,
 357                                   _mesa_glsl_parse_state *state) const;
 358
 359    /**
 360     * Query whether or not a type is a scalar (non-vector and non-matrix).
 361     */
 362    bool is_scalar() const
 363    {
 364       return (vector_elements == 1)
 365          && (base_type >= GLSL_TYPE_UINT)
 366          && (base_type <= GLSL_TYPE_BOOL);
 367    }
 368
 369    /**
 370     * Query whether or not a type is a vector
 371     */
 372    bool is_vector() const
 373    {
 374       return (vector_elements > 1)
 375          && (matrix_columns == 1)
 376          && (base_type >= GLSL_TYPE_UINT)
 377          && (base_type <= GLSL_TYPE_BOOL);
 378    }
 379
 380    /**
 381     * Query whether or not a type is a matrix
 382     */
 383    bool is_matrix() const
 384    {
 385       /* GLSL only has float matrices. */
 386       return (matrix_columns > 1) && (base_type == GLSL_TYPE_FLOAT || base_type == GLSL_TYPE_DOUBLE);
 387    }
 388
 389    /**
 390     * Query whether or not a type is a non-array numeric type
 391     */
 392    bool is_numeric() const
 393    {
 394       return (base_type >= GLSL_TYPE_UINT) && (base_type <= GLSL_TYPE_DOUBLE);
 395    }
 396
 397    /**
 398     * Query whether or not a type is an integral type
 399     */
 400    bool is_integer() const
 401    {
 402       return (base_type == GLSL_TYPE_UINT) || (base_type == GLSL_TYPE_INT);
 403    }
 404
 405    /**
 406     * Query whether or not type is an integral type, or for struct and array
 407     * types, contains an integral type.
 408     */
 409    bool contains_integer() const;
 410
 411    /**
 412     * Query whether or not type is a double type, or for struct and array
 413     * types, contains a double type.
 414     */
 415    bool contains_double() const;
 416
 417    /**
 418     * Query whether or not a type is a float type
 419     */
 420    bool is_float() const
 421    {
 422       return base_type == GLSL_TYPE_FLOAT;
 423    }
 424
 425    /**
 426     * Query whether or not a type is a double type
 427     */
 428    bool is_double() const
 429    {
 430       return base_type == GLSL_TYPE_DOUBLE;
 431    }
 432
 433    /**
 434     * Query whether or not a type is a non-array boolean type
 435     */
 436    bool is_boolean() const
 437    {
 438       return base_type == GLSL_TYPE_BOOL;
 439    }
 440
 441    /**
 442     * Query whether or not a type is a sampler
 443     */
 444    bool is_sampler() const
 445    {
 446       return base_type == GLSL_TYPE_SAMPLER;
 447    }
 448
 449    /**
 450     * Query whether or not type is a sampler, or for struct and array
 451     * types, contains a sampler.
 452     */
 453    bool contains_sampler() const;
 454
 455    /**
 456     * Get the Mesa texture target index for a sampler type.
 457     */
 458    gl_texture_index sampler_index() const;
 459
 460    /**
 461     * Query whether or not type is an image, or for struct and array
 462     * types, contains an image.
 463     */
 464    bool contains_image() const;
 465
 466    /**
 467     * Query whether or not a type is an image
 468     */
 469    bool is_image() const
 470    {
 471       return base_type == GLSL_TYPE_IMAGE;
 472    }
 473
 474    /**
 475     * Query whether or not a type is an array
 476     */
 477    bool is_array() const
 478    {
 479       return base_type == GLSL_TYPE_ARRAY;
 480    }
 481
 482    /**
 483     * Query whether or not a type is a record
 484     */
 485    bool is_record() const
 486    {
 487       return base_type == GLSL_TYPE_STRUCT;
 488    }
 489
 490    /**
 491     * Query whether or not a type is an interface
 492     */
 493    bool is_interface() const
 494    {
 495       return base_type == GLSL_TYPE_INTERFACE;
 496    }
 497
 498    /**
 499     * Query whether or not a type is the void type singleton.
 500     */
 501    bool is_void() const
 502    {
 503       return base_type == GLSL_TYPE_VOID;
 504    }
 505
 506    /**
 507     * Query whether or not a type is the error type singleton.
 508     */
 509    bool is_error() const
 510    {
 511       return base_type == GLSL_TYPE_ERROR;
 512    }
 513
 514    /**
 515     * Query if a type is unnamed/anonymous (named by the parser)
 516     */
 517    bool is_anonymous() const
 518    {
 519       return !strncmp(name, "#anon", 5);
 520    }
 521
 522    /**
 523     * Get the type stripped of any arrays
 524     *
 525     * \return
 526     * Pointer to the type of elements of the first non-array type for array
 527     * types, or pointer to itself for non-array types.
 528     */
 529    const glsl_type *without_array() const
 530    {
 531       const glsl_type *t = this;
 532
 533       while (t->is_array())
 534          t = t->fields.array;
 535
 536       return t;
 537    }
 538
 539    /**
 540     * Return the amount of atomic counter storage required for a type.
 541     */
 542    unsigned atomic_size() const
 543    {
 544       if (base_type == GLSL_TYPE_ATOMIC_UINT)
 545          return ATOMIC_COUNTER_SIZE;
 546       else if (is_array())
 547          return length * fields.array->atomic_size();
 548       else
 549          return 0;
 550    }
 551
 552    /**
 553     * Return whether a type contains any atomic counters.
 554     */
 555    bool contains_atomic() const
 556    {
 557       return atomic_size() > 0;
 558    }
 559
 560    /**
 561     * Return whether a type contains any opaque types.
 562     */
 563    bool contains_opaque() const;
 564
 565    /**
 566     * Query the full type of a matrix row
 567     *
 568     * \return
 569     * If the type is not a matrix, \c glsl_type::error_type is returned.
 570     * Otherwise a type matching the rows of the matrix is returned.
 571     */
 572    const glsl_type *row_type() const
 573    {
 574       return is_matrix()
 575          ? get_instance(base_type, matrix_columns, 1)
 576          : error_type;
 577    }
 578
 579    /**
 580     * Query the full type of a matrix column
 581     *
 582     * \return
 583     * If the type is not a matrix, \c glsl_type::error_type is returned.
 584     * Otherwise a type matching the columns of the matrix is returned.
 585     */
 586    const glsl_type *column_type() const
 587    {
 588       return is_matrix()
 589          ? get_instance(base_type, vector_elements, 1)
 590          : error_type;
 591    }
 592
 593    /**
 594     * Get the type of a structure field
 595     *
 596     * \return
 597     * Pointer to the type of the named field.  If the type is not a structure
 598     * or the named field does not exist, \c glsl_type::error_type is returned.
 599     */
 600    const glsl_type *field_type(const char *name) const;
 601
 602    /**
 603     * Get the location of a filed within a record type
 604     */
 605    int field_index(const char *name) const;
 606
 607    /**
 608     * Query the number of elements in an array type
 609     *
 610     * \return
 611     * The number of elements in the array for array types or -1 for non-array
 612     * types.  If the number of elements in the array has not yet been declared,
 613     * zero is returned.
 614     */
 615    int array_size() const
 616    {
 617       return is_array() ? length : -1;
 618    }
 619
 620    /**
 621     * Query whether the array size for all dimensions has been declared.
 622     */
 623    bool is_unsized_array() const
 624    {
 625       return is_array() && length == 0;
 626    }
 627
 628    /**
 629     * Return the number of coordinate components needed for this
 630     * sampler or image type.
 631     *
 632     * This is based purely on the sampler's dimensionality.  For example, this
 633     * returns 1 for sampler1D, and 3 for sampler2DArray.
 634     *
 635     * Note that this is often different than actual coordinate type used in
 636     * a texturing built-in function, since those pack additional values (such
 637     * as the shadow comparitor or projector) into the coordinate type.
 638     */
 639    int coordinate_components() const;
 640
 641    /**
 642     * Compare a record type against another record type.
 643     *
 644     * This is useful for matching record types declared across shader stages.
 645     */
 646    bool record_compare(const glsl_type *b) const;
 647
 648 private:
 649
 650    static mtx_t mutex;
 651
 652    /**
 653     * ralloc context for all glsl_type allocations
 654     *
 655     * Set on the first call to \c glsl_type::new.
 656     */
 657    static void *mem_ctx;
 658
 659    void init_ralloc_type_ctx(void);
 660
 661    /** Constructor for vector and matrix types */
 662    glsl_type(GLenum gl_type,
 663              glsl_base_type base_type, unsigned vector_elements,
 664              unsigned matrix_columns, const char *name);
 665
 666    /** Constructor for sampler or image types */
 667    glsl_type(GLenum gl_type, glsl_base_type base_type,
 668              enum glsl_sampler_dim dim, bool shadow, bool array,
 669              unsigned type, const char *name);
 670
 671    /** Constructor for record types */
 672    glsl_type(const glsl_struct_field *fields, unsigned num_fields,
 673              const char *name);
 674
 675    /** Constructor for interface types */
 676    glsl_type(const glsl_struct_field *fields, unsigned num_fields,
 677              enum glsl_interface_packing packing, const char *name);
 678
 679    /** Constructor for array types */
 680    glsl_type(const glsl_type *array, unsigned length);
 681
 682    /** Hash table containing the known array types. */
 683    static struct hash_table *array_types;
 684
 685    /** Hash table containing the known record types. */
 686    static struct hash_table *record_types;
 687
 688    /** Hash table containing the known interface types. */
 689    static struct hash_table *interface_types;
 690
 691    static bool record_key_compare(const void *a, const void *b);
 692    static unsigned record_key_hash(const void *key);
 693
 694    /**
 695     * \name Built-in type flyweights
 696     */
 697    /*@{*/
 698 #undef  DECL_TYPE
 699 #define DECL_TYPE(NAME, ...) static const glsl_type _##NAME##_type;
 700 #undef  STRUCT_TYPE
 701 #define STRUCT_TYPE(NAME)        static const glsl_type _struct_##NAME##_type;
 702 #include "builtin_type_macros.h"
 703    /*@}*/
 704
 705    /**
 706     * \name Friend functions.
 707     *
 708     * These functions are friends because they must have C linkage and the
 709     * need to call various private methods or access various private static
 710     * data.
 711     */
 712    /*@{*/
 713    friend void _mesa_glsl_initialize_types(struct _mesa_glsl_parse_state *);
 714    friend void _mesa_glsl_release_types(void);
 715    /*@}*/
 716 };
 717
 718 struct glsl_struct_field {
 719    const struct glsl_type *type;
 720    const char *name;
 721
 722    /**
 723     * For interface blocks, gl_varying_slot corresponding to the input/output
 724     * if this is a built-in input/output (i.e. a member of the built-in
 725     * gl_PerVertex interface block); -1 otherwise.
 726     *
 727     * Ignored for structs.
 728     */
 729    int location;
 730
 731    /**
 732     * For interface blocks, the interpolation mode (as in
 733     * ir_variable::interpolation).  0 otherwise.
 734     */
 735    unsigned interpolation:2;
 736
 737    /**
 738     * For interface blocks, 1 if this variable uses centroid interpolation (as
 739     * in ir_variable::centroid).  0 otherwise.
 740     */
 741    unsigned centroid:1;
 742
 743    /**
 744     * For interface blocks, 1 if this variable uses sample interpolation (as
 745     * in ir_variable::sample). 0 otherwise.
 746     */
 747    unsigned sample:1;
 748
 749    /**
 750     * Layout of the matrix.  Uses glsl_matrix_layout values.
 751     */
 752    unsigned matrix_layout:2;
 753
 754    /**
 755     * For interface blocks, 1 if this variable is a per-patch input or output
 756     * (as in ir_variable::patch). 0 otherwise.
 757     */
 758    unsigned patch:1;
 759
 760    /**
 761     * For interface blocks, it has a value if this variable uses multiple vertex
 762     * streams (as in ir_variable::stream). -1 otherwise.
 763     */
 764    int stream;
 765 };
 766
 767 static inline unsigned int
 768 glsl_align(unsigned int a, unsigned int align)
 769 {
 770    return (a + align - 1) / align * align;
 771 }
 772
 773 #undef DECL_TYPE
 774 #undef STRUCT_TYPE
 775 #endif /* __cplusplus */
 776
 777 #endif /* GLSL_TYPES_H */