3 * Copyright © 2009 Intel Corporation
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:
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
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.
38 struct _mesa_glsl_parse_state;
39 struct glsl_symbol_table;
42 _mesa_glsl_initialize_types(struct _mesa_glsl_parse_state *state);
45 _mesa_glsl_release_types(void);
59 enum glsl_sampler_dim {
60 GLSL_SAMPLER_DIM_1D = 0,
63 GLSL_SAMPLER_DIM_CUBE,
64 GLSL_SAMPLER_DIM_RECT,
71 glsl_base_type base_type;
73 unsigned sampler_dimensionality:3; /**< \see glsl_sampler_dim */
74 unsigned sampler_shadow:1;
75 unsigned sampler_array:1;
76 unsigned sampler_type:2; /**< Type of data returned using this sampler.
77 * only \c GLSL_TYPE_FLOAT, \c GLSL_TYPE_INT,
78 * and \c GLSL_TYPE_UINT are valid.
81 /* Callers of this ralloc-based new need not call delete. It's
82 * easier to just ralloc_free 'mem_ctx' (or any of its ancestors). */
83 static void* operator new(size_t size)
85 if (glsl_type::mem_ctx == NULL) {
86 glsl_type::mem_ctx = ralloc_context(NULL);
87 assert(glsl_type::mem_ctx != NULL);
92 type = ralloc_size(glsl_type::mem_ctx, size);
98 /* If the user *does* call delete, that's OK, we will just
99 * ralloc_free in that case. */
100 static void operator delete(void *type)
106 * \name Vector and matrix element counts
108 * For scalars, each of these values will be 1. For non-numeric types
112 unsigned vector_elements:3; /**< 1, 2, 3, or 4 vector elements. */
113 unsigned matrix_columns:3; /**< 1, 2, 3, or 4 matrix columns. */
117 * Name of the data type
119 * This may be \c NULL for anonymous structures, for arrays, or for
125 * For \c GLSL_TYPE_ARRAY, this is the length of the array. For
126 * \c GLSL_TYPE_STRUCT, it is the number of elements in the structure and
127 * the number of values pointed to by \c fields.structure (below).
132 * Subtype of composite data types.
135 const struct glsl_type *array; /**< Type of array elements. */
136 const struct glsl_type *parameters; /**< Parameters to function. */
137 struct glsl_struct_field *structure; /**< List of struct fields. */
142 * \name Pointers to various public type singletons
145 static const glsl_type *const error_type;
146 static const glsl_type *const void_type;
147 static const glsl_type *const int_type;
148 static const glsl_type *const ivec4_type;
149 static const glsl_type *const uint_type;
150 static const glsl_type *const uvec2_type;
151 static const glsl_type *const uvec3_type;
152 static const glsl_type *const uvec4_type;
153 static const glsl_type *const float_type;
154 static const glsl_type *const vec2_type;
155 static const glsl_type *const vec3_type;
156 static const glsl_type *const vec4_type;
157 static const glsl_type *const bool_type;
158 static const glsl_type *const mat2_type;
159 static const glsl_type *const mat2x3_type;
160 static const glsl_type *const mat2x4_type;
161 static const glsl_type *const mat3x2_type;
162 static const glsl_type *const mat3_type;
163 static const glsl_type *const mat3x4_type;
164 static const glsl_type *const mat4x2_type;
165 static const glsl_type *const mat4x3_type;
166 static const glsl_type *const mat4_type;
171 * For numeric and boolean derrived types returns the basic scalar type
173 * If the type is a numeric or boolean scalar, vector, or matrix type,
174 * this function gets the scalar type of the individual components. For
175 * all other types, including arrays of numeric or boolean types, the
176 * error type is returned.
178 const glsl_type *get_base_type() const;
181 * Query the type of elements in an array
184 * Pointer to the type of elements in the array for array types, or \c NULL
185 * for non-array types.
187 const glsl_type *element_type() const
189 return is_array() ? fields.array : NULL;
193 * Get the instance of a built-in scalar, vector, or matrix type
195 static const glsl_type *get_instance(unsigned base_type, unsigned rows,
199 * Get the instance of an array type
201 static const glsl_type *get_array_instance(const glsl_type *base,
205 * Get the instance of a record type
207 static const glsl_type *get_record_instance(const glsl_struct_field *fields,
212 * Query the total number of scalars that make up a scalar, vector or matrix
214 unsigned components() const
216 return vector_elements * matrix_columns;
220 * Calculate the number of components slots required to hold this type
222 * This is used to determine how many uniform or varying locations a type
225 unsigned component_slots() const;
228 * \brief Can this type be implicitly converted to another?
230 * \return True if the types are identical or if this type can be converted
231 * to \c desired according to Section 4.1.10 of the GLSL spec.
234 * From page 25 (31 of the pdf) of the GLSL 1.50 spec, Section 4.1.10
235 * Implicit Conversions:
237 * In some situations, an expression and its type will be implicitly
238 * converted to a different type. The following table shows all allowed
239 * implicit conversions:
241 * Type of expression | Can be implicitly converted to
242 * --------------------------------------------------
255 * There are no implicit array or structure conversions. For example,
256 * an array of int cannot be implicitly converted to an array of float.
257 * There are no implicit conversions between signed and unsigned
261 bool can_implicitly_convert_to(const glsl_type *desired) const;
264 * Query whether or not a type is a scalar (non-vector and non-matrix).
266 bool is_scalar() const
268 return (vector_elements == 1)
269 && (base_type >= GLSL_TYPE_UINT)
270 && (base_type <= GLSL_TYPE_BOOL);
274 * Query whether or not a type is a vector
276 bool is_vector() const
278 return (vector_elements > 1)
279 && (matrix_columns == 1)
280 && (base_type >= GLSL_TYPE_UINT)
281 && (base_type <= GLSL_TYPE_BOOL);
285 * Query whether or not a type is a matrix
287 bool is_matrix() const
289 /* GLSL only has float matrices. */
290 return (matrix_columns > 1) && (base_type == GLSL_TYPE_FLOAT);
294 * Query whether or not a type is a non-array numeric type
296 bool is_numeric() const
298 return (base_type >= GLSL_TYPE_UINT) && (base_type <= GLSL_TYPE_FLOAT);
302 * Query whether or not a type is an integral type
304 bool is_integer() const
306 return (base_type == GLSL_TYPE_UINT) || (base_type == GLSL_TYPE_INT);
310 * Query whether or not a type is a float type
312 bool is_float() const
314 return base_type == GLSL_TYPE_FLOAT;
318 * Query whether or not a type is a non-array boolean type
320 bool is_boolean() const
322 return base_type == GLSL_TYPE_BOOL;
326 * Query whether or not a type is a sampler
328 bool is_sampler() const
330 return base_type == GLSL_TYPE_SAMPLER;
334 * Query whether or not type is a sampler, or for struct and array
335 * types, contains a sampler.
337 bool contains_sampler() const;
340 * Query whether or not a type is an array
342 bool is_array() const
344 return base_type == GLSL_TYPE_ARRAY;
348 * Query whether or not a type is a record
350 bool is_record() const
352 return base_type == GLSL_TYPE_STRUCT;
356 * Query whether or not a type is the void type singleton.
360 return base_type == GLSL_TYPE_VOID;
364 * Query whether or not a type is the error type singleton.
366 bool is_error() const
368 return base_type == GLSL_TYPE_ERROR;
372 * Query the full type of a matrix row
375 * If the type is not a matrix, \c glsl_type::error_type is returned.
376 * Otherwise a type matching the rows of the matrix is returned.
378 const glsl_type *row_type() const
381 ? get_instance(base_type, matrix_columns, 1)
386 * Query the full type of a matrix column
389 * If the type is not a matrix, \c glsl_type::error_type is returned.
390 * Otherwise a type matching the columns of the matrix is returned.
392 const glsl_type *column_type() const
395 ? get_instance(base_type, vector_elements, 1)
401 * Get the type of a structure field
404 * Pointer to the type of the named field. If the type is not a structure
405 * or the named field does not exist, \c glsl_type::error_type is returned.
407 const glsl_type *field_type(const char *name) const;
411 * Get the location of a filed within a record type
413 int field_index(const char *name) const;
417 * Query the number of elements in an array type
420 * The number of elements in the array for array types or -1 for non-array
421 * types. If the number of elements in the array has not yet been declared,
424 int array_size() const
426 return is_array() ? length : -1;
431 * ralloc context for all glsl_type allocations
433 * Set on the first call to \c glsl_type::new.
435 static void *mem_ctx;
437 void init_ralloc_type_ctx(void);
439 /** Constructor for vector and matrix types */
440 glsl_type(GLenum gl_type,
441 glsl_base_type base_type, unsigned vector_elements,
442 unsigned matrix_columns, const char *name);
444 /** Constructor for sampler types */
445 glsl_type(GLenum gl_type,
446 enum glsl_sampler_dim dim, bool shadow, bool array,
447 unsigned type, const char *name);
449 /** Constructor for record types */
450 glsl_type(const glsl_struct_field *fields, unsigned num_fields,
453 /** Constructor for array types */
454 glsl_type(const glsl_type *array, unsigned length);
456 /** Hash table containing the known array types. */
457 static struct hash_table *array_types;
459 /** Hash table containing the known record types. */
460 static struct hash_table *record_types;
462 static int record_key_compare(const void *a, const void *b);
463 static unsigned record_key_hash(const void *key);
466 * \name Pointers to various type singletons
469 static const glsl_type _error_type;
470 static const glsl_type _void_type;
471 static const glsl_type _sampler3D_type;
472 static const glsl_type builtin_core_types[];
473 static const glsl_type builtin_structure_types[];
474 static const glsl_type builtin_110_deprecated_structure_types[];
475 static const glsl_type builtin_110_types[];
476 static const glsl_type builtin_120_types[];
477 static const glsl_type builtin_130_types[];
478 static const glsl_type builtin_ARB_texture_rectangle_types[];
479 static const glsl_type builtin_EXT_texture_array_types[];
480 static const glsl_type builtin_EXT_texture_buffer_object_types[];
484 * \name Methods to populate a symbol table with built-in types.
487 * This is one of the truely annoying things about C++. Methods that are
488 * completely internal and private to a type still have to be advertised to
489 * the world in a public header file.
492 static void generate_100ES_types(glsl_symbol_table *);
493 static void generate_110_types(glsl_symbol_table *);
494 static void generate_120_types(glsl_symbol_table *);
495 static void generate_130_types(glsl_symbol_table *);
496 static void generate_ARB_texture_rectangle_types(glsl_symbol_table *, bool);
497 static void generate_EXT_texture_array_types(glsl_symbol_table *, bool);
498 static void generate_OES_texture_3D_types(glsl_symbol_table *, bool);
502 * \name Friend functions.
504 * These functions are friends because they must have C linkage and the
505 * need to call various private methods or access various private static
509 friend void _mesa_glsl_initialize_types(struct _mesa_glsl_parse_state *);
510 friend void _mesa_glsl_release_types(void);
514 struct glsl_struct_field {
515 const struct glsl_type *type;
519 #endif /* GLSL_TYPES_H */