2 * Copyright © 2009 Intel Corporation
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:
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
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.
26 #include "main/core.h" /* for Elements */
27 #include "glsl_symbol_table.h"
28 #include "glsl_parser_extras.h"
29 #include "glsl_types.h"
30 #include "builtin_types.h"
32 #include "program/hash_table.h"
35 hash_table
*glsl_type::array_types
= NULL
;
36 hash_table
*glsl_type::record_types
= NULL
;
37 hash_table
*glsl_type::interface_types
= NULL
;
38 void *glsl_type::mem_ctx
= NULL
;
41 glsl_type::init_ralloc_type_ctx(void)
43 if (glsl_type::mem_ctx
== NULL
) {
44 glsl_type::mem_ctx
= ralloc_autofree_context();
45 assert(glsl_type::mem_ctx
!= NULL
);
49 glsl_type::glsl_type(GLenum gl_type
,
50 glsl_base_type base_type
, unsigned vector_elements
,
51 unsigned matrix_columns
, const char *name
) :
54 sampler_dimensionality(0), sampler_shadow(0), sampler_array(0),
55 sampler_type(0), interface_packing(0),
56 vector_elements(vector_elements
), matrix_columns(matrix_columns
),
59 init_ralloc_type_ctx();
60 this->name
= ralloc_strdup(this->mem_ctx
, name
);
61 /* Neither dimension is zero or both dimensions are zero.
63 assert((vector_elements
== 0) == (matrix_columns
== 0));
64 memset(& fields
, 0, sizeof(fields
));
67 glsl_type::glsl_type(GLenum gl_type
,
68 enum glsl_sampler_dim dim
, bool shadow
, bool array
,
69 unsigned type
, const char *name
) :
71 base_type(GLSL_TYPE_SAMPLER
),
72 sampler_dimensionality(dim
), sampler_shadow(shadow
),
73 sampler_array(array
), sampler_type(type
), interface_packing(0),
74 vector_elements(0), matrix_columns(0),
77 init_ralloc_type_ctx();
78 this->name
= ralloc_strdup(this->mem_ctx
, name
);
79 memset(& fields
, 0, sizeof(fields
));
82 glsl_type::glsl_type(const glsl_struct_field
*fields
, unsigned num_fields
,
84 base_type(GLSL_TYPE_STRUCT
),
85 sampler_dimensionality(0), sampler_shadow(0), sampler_array(0),
86 sampler_type(0), interface_packing(0),
87 vector_elements(0), matrix_columns(0),
92 init_ralloc_type_ctx();
93 this->name
= ralloc_strdup(this->mem_ctx
, name
);
94 this->fields
.structure
= ralloc_array(this->mem_ctx
,
95 glsl_struct_field
, length
);
96 for (i
= 0; i
< length
; i
++) {
97 this->fields
.structure
[i
].type
= fields
[i
].type
;
98 this->fields
.structure
[i
].name
= ralloc_strdup(this->fields
.structure
,
100 this->fields
.structure
[i
].row_major
= fields
[i
].row_major
;
104 glsl_type::glsl_type(const glsl_struct_field
*fields
, unsigned num_fields
,
105 enum glsl_interface_packing packing
, const char *name
) :
106 base_type(GLSL_TYPE_INTERFACE
),
107 sampler_dimensionality(0), sampler_shadow(0), sampler_array(0),
108 sampler_type(0), interface_packing((unsigned) packing
),
109 vector_elements(0), matrix_columns(0),
114 init_ralloc_type_ctx();
115 this->name
= ralloc_strdup(this->mem_ctx
, name
);
116 this->fields
.structure
= ralloc_array(this->mem_ctx
,
117 glsl_struct_field
, length
);
118 for (i
= 0; i
< length
; i
++) {
119 this->fields
.structure
[i
].type
= fields
[i
].type
;
120 this->fields
.structure
[i
].name
= ralloc_strdup(this->fields
.structure
,
122 this->fields
.structure
[i
].row_major
= fields
[i
].row_major
;
127 add_types_to_symbol_table(glsl_symbol_table
*symtab
,
128 const struct glsl_type
*types
,
129 unsigned num_types
, bool warn
,
134 for (unsigned i
= 0; i
< num_types
; i
++) {
135 if (skip_1d
&& types
[i
].base_type
== GLSL_TYPE_SAMPLER
136 && types
[i
].sampler_dimensionality
== GLSL_SAMPLER_DIM_1D
)
139 symtab
->add_type(types
[i
].name
, & types
[i
]);
144 glsl_type::contains_sampler() const
146 if (this->is_array()) {
147 return this->fields
.array
->contains_sampler();
148 } else if (this->is_record()) {
149 for (unsigned int i
= 0; i
< this->length
; i
++) {
150 if (this->fields
.structure
[i
].type
->contains_sampler())
155 return this->is_sampler();
160 glsl_type::sampler_index() const
162 const glsl_type
*const t
= (this->is_array()) ? this->fields
.array
: this;
164 assert(t
->is_sampler());
166 switch (t
->sampler_dimensionality
) {
167 case GLSL_SAMPLER_DIM_1D
:
168 return (t
->sampler_array
) ? TEXTURE_1D_ARRAY_INDEX
: TEXTURE_1D_INDEX
;
169 case GLSL_SAMPLER_DIM_2D
:
170 return (t
->sampler_array
) ? TEXTURE_2D_ARRAY_INDEX
: TEXTURE_2D_INDEX
;
171 case GLSL_SAMPLER_DIM_3D
:
172 return TEXTURE_3D_INDEX
;
173 case GLSL_SAMPLER_DIM_CUBE
:
174 return (t
->sampler_array
) ? TEXTURE_CUBE_ARRAY_INDEX
: TEXTURE_CUBE_INDEX
;
175 case GLSL_SAMPLER_DIM_RECT
:
176 return TEXTURE_RECT_INDEX
;
177 case GLSL_SAMPLER_DIM_BUF
:
178 return TEXTURE_BUFFER_INDEX
;
179 case GLSL_SAMPLER_DIM_EXTERNAL
:
180 return TEXTURE_EXTERNAL_INDEX
;
182 assert(!"Should not get here.");
183 return TEXTURE_BUFFER_INDEX
;
188 glsl_type::generate_100ES_types(glsl_symbol_table
*symtab
)
190 bool skip_1d
= false;
191 add_types_to_symbol_table(symtab
, builtin_core_types
,
192 Elements(builtin_core_types
),
194 add_types_to_symbol_table(symtab
, builtin_structure_types
,
195 Elements(builtin_structure_types
),
197 add_types_to_symbol_table(symtab
, void_type
, 1, false, skip_1d
);
201 glsl_type::generate_300ES_types(glsl_symbol_table
*symtab
)
203 /* GLSL 3.00 ES types are the same as GLSL 1.30 types, except that 1D
204 * samplers are skipped, and samplerCubeShadow is added.
206 bool add_deprecated
= false;
209 generate_130_types(symtab
, add_deprecated
, skip_1d
);
211 add_types_to_symbol_table(symtab
, &_samplerCubeShadow_type
, 1, false,
216 glsl_type::generate_110_types(glsl_symbol_table
*symtab
, bool add_deprecated
,
219 generate_100ES_types(symtab
);
221 add_types_to_symbol_table(symtab
, builtin_110_types
,
222 Elements(builtin_110_types
),
224 add_types_to_symbol_table(symtab
, &_sampler3D_type
, 1, false, skip_1d
);
225 if (add_deprecated
) {
226 add_types_to_symbol_table(symtab
, builtin_110_deprecated_structure_types
,
227 Elements(builtin_110_deprecated_structure_types
),
234 glsl_type::generate_120_types(glsl_symbol_table
*symtab
, bool add_deprecated
,
237 generate_110_types(symtab
, add_deprecated
, skip_1d
);
239 add_types_to_symbol_table(symtab
, builtin_120_types
,
240 Elements(builtin_120_types
), false, skip_1d
);
245 glsl_type::generate_130_types(glsl_symbol_table
*symtab
, bool add_deprecated
,
248 generate_120_types(symtab
, add_deprecated
, skip_1d
);
250 add_types_to_symbol_table(symtab
, builtin_130_types
,
251 Elements(builtin_130_types
), false, skip_1d
);
252 generate_EXT_texture_array_types(symtab
, false);
257 glsl_type::generate_140_types(glsl_symbol_table
*symtab
)
259 bool skip_1d
= false;
261 generate_130_types(symtab
, false, skip_1d
);
263 add_types_to_symbol_table(symtab
, builtin_140_types
,
264 Elements(builtin_140_types
), false, skip_1d
);
266 add_types_to_symbol_table(symtab
, builtin_EXT_texture_buffer_object_types
,
267 Elements(builtin_EXT_texture_buffer_object_types
),
273 glsl_type::generate_ARB_texture_rectangle_types(glsl_symbol_table
*symtab
,
276 bool skip_1d
= false;
278 add_types_to_symbol_table(symtab
, builtin_ARB_texture_rectangle_types
,
279 Elements(builtin_ARB_texture_rectangle_types
),
285 glsl_type::generate_EXT_texture_array_types(glsl_symbol_table
*symtab
,
288 bool skip_1d
= false;
290 add_types_to_symbol_table(symtab
, builtin_EXT_texture_array_types
,
291 Elements(builtin_EXT_texture_array_types
),
297 glsl_type::generate_OES_texture_3D_types(glsl_symbol_table
*symtab
, bool warn
)
299 bool skip_1d
= false;
301 add_types_to_symbol_table(symtab
, &_sampler3D_type
, 1, warn
, skip_1d
);
306 glsl_type::generate_OES_EGL_image_external_types(glsl_symbol_table
*symtab
,
309 bool skip_1d
= false;
311 add_types_to_symbol_table(symtab
, builtin_OES_EGL_image_external_types
,
312 Elements(builtin_OES_EGL_image_external_types
),
317 glsl_type::generate_ARB_texture_cube_map_array_types(glsl_symbol_table
*symtab
,
320 bool skip_1d
= false;
322 add_types_to_symbol_table(symtab
, builtin_ARB_texture_cube_map_array_types
,
323 Elements(builtin_ARB_texture_cube_map_array_types
),
328 _mesa_glsl_initialize_types(struct _mesa_glsl_parse_state
*state
)
330 if (state
->es_shader
) {
331 switch (state
->language_version
) {
333 assert(state
->es_shader
);
334 glsl_type::generate_100ES_types(state
->symbols
);
337 glsl_type::generate_300ES_types(state
->symbols
);
340 assert(!"Unexpected language version");
344 bool skip_1d
= false;
345 switch (state
->language_version
) {
347 glsl_type::generate_110_types(state
->symbols
, true, skip_1d
);
350 glsl_type::generate_120_types(state
->symbols
, true, skip_1d
);
353 glsl_type::generate_130_types(state
->symbols
, true, skip_1d
);
356 glsl_type::generate_140_types(state
->symbols
);
359 assert(!"Unexpected language version");
364 if (state
->ARB_texture_rectangle_enable
||
365 state
->is_version(140, 0)) {
366 glsl_type::generate_ARB_texture_rectangle_types(state
->symbols
,
367 state
->ARB_texture_rectangle_warn
);
369 if (state
->OES_texture_3D_enable
370 && state
->is_version(0, 100)) {
371 glsl_type::generate_OES_texture_3D_types(state
->symbols
,
372 state
->OES_texture_3D_warn
);
375 if (state
->EXT_texture_array_enable
376 && !state
->is_version(130, 0)) {
377 // These are already included in 130; don't create twice.
378 glsl_type::generate_EXT_texture_array_types(state
->symbols
,
379 state
->EXT_texture_array_warn
);
382 /* We cannot check for language_version == 100 here because we need the
383 * types to support fixed-function program generation. But this is fine
384 * since the extension is never enabled for OpenGL contexts.
386 if (state
->OES_EGL_image_external_enable
) {
387 glsl_type::generate_OES_EGL_image_external_types(state
->symbols
,
388 state
->OES_EGL_image_external_warn
);
391 if (state
->ARB_texture_cube_map_array_enable
) {
392 glsl_type::generate_ARB_texture_cube_map_array_types(state
->symbols
,
393 state
->ARB_texture_cube_map_array_warn
);
398 const glsl_type
*glsl_type::get_base_type() const
405 case GLSL_TYPE_FLOAT
:
415 const glsl_type
*glsl_type::get_scalar_type() const
417 const glsl_type
*type
= this;
420 while (type
->base_type
== GLSL_TYPE_ARRAY
)
421 type
= type
->fields
.array
;
423 /* Handle vectors and matrices */
424 switch (type
->base_type
) {
429 case GLSL_TYPE_FLOAT
:
432 /* Handle everything else */
439 _mesa_glsl_release_types(void)
441 if (glsl_type::array_types
!= NULL
) {
442 hash_table_dtor(glsl_type::array_types
);
443 glsl_type::array_types
= NULL
;
446 if (glsl_type::record_types
!= NULL
) {
447 hash_table_dtor(glsl_type::record_types
);
448 glsl_type::record_types
= NULL
;
453 glsl_type::glsl_type(const glsl_type
*array
, unsigned length
) :
454 base_type(GLSL_TYPE_ARRAY
),
455 sampler_dimensionality(0), sampler_shadow(0), sampler_array(0),
456 sampler_type(0), interface_packing(0),
457 vector_elements(0), matrix_columns(0),
458 name(NULL
), length(length
)
460 this->fields
.array
= array
;
461 /* Inherit the gl type of the base. The GL type is used for
462 * uniform/statevar handling in Mesa and the arrayness of the type
463 * is represented by the size rather than the type.
465 this->gl_type
= array
->gl_type
;
467 /* Allow a maximum of 10 characters for the array size. This is enough
468 * for 32-bits of ~0. The extra 3 are for the '[', ']', and terminating
471 const unsigned name_length
= strlen(array
->name
) + 10 + 3;
472 char *const n
= (char *) ralloc_size(this->mem_ctx
, name_length
);
475 snprintf(n
, name_length
, "%s[]", array
->name
);
477 snprintf(n
, name_length
, "%s[%u]", array
->name
, length
);
484 glsl_type::get_instance(unsigned base_type
, unsigned rows
, unsigned columns
)
486 if (base_type
== GLSL_TYPE_VOID
)
489 if ((rows
< 1) || (rows
> 4) || (columns
< 1) || (columns
> 4))
492 /* Treat GLSL vectors as Nx1 matrices.
497 return uint_type
+ (rows
- 1);
499 return int_type
+ (rows
- 1);
500 case GLSL_TYPE_FLOAT
:
501 return float_type
+ (rows
- 1);
503 return bool_type
+ (rows
- 1);
508 if ((base_type
!= GLSL_TYPE_FLOAT
) || (rows
== 1))
511 /* GLSL matrix types are named mat{COLUMNS}x{ROWS}. Only the following
512 * combinations are valid:
520 #define IDX(c,r) (((c-1)*3) + (r-1))
522 switch (IDX(columns
, rows
)) {
523 case IDX(2,2): return mat2_type
;
524 case IDX(2,3): return mat2x3_type
;
525 case IDX(2,4): return mat2x4_type
;
526 case IDX(3,2): return mat3x2_type
;
527 case IDX(3,3): return mat3_type
;
528 case IDX(3,4): return mat3x4_type
;
529 case IDX(4,2): return mat4x2_type
;
530 case IDX(4,3): return mat4x3_type
;
531 case IDX(4,4): return mat4_type
;
532 default: return error_type
;
536 assert(!"Should not get here.");
542 glsl_type::get_array_instance(const glsl_type
*base
, unsigned array_size
)
545 if (array_types
== NULL
) {
546 array_types
= hash_table_ctor(64, hash_table_string_hash
,
547 hash_table_string_compare
);
550 /* Generate a name using the base type pointer in the key. This is
551 * done because the name of the base type may not be unique across
552 * shaders. For example, two shaders may have different record types
556 snprintf(key
, sizeof(key
), "%p[%u]", (void *) base
, array_size
);
558 const glsl_type
*t
= (glsl_type
*) hash_table_find(array_types
, key
);
560 t
= new glsl_type(base
, array_size
);
562 hash_table_insert(array_types
, (void *) t
, ralloc_strdup(mem_ctx
, key
));
565 assert(t
->base_type
== GLSL_TYPE_ARRAY
);
566 assert(t
->length
== array_size
);
567 assert(t
->fields
.array
== base
);
574 glsl_type::record_key_compare(const void *a
, const void *b
)
576 const glsl_type
*const key1
= (glsl_type
*) a
;
577 const glsl_type
*const key2
= (glsl_type
*) b
;
579 /* Return zero is the types match (there is zero difference) or non-zero
582 if (strcmp(key1
->name
, key2
->name
) != 0)
585 if (key1
->length
!= key2
->length
)
588 if (key1
->interface_packing
!= key2
->interface_packing
)
591 for (unsigned i
= 0; i
< key1
->length
; i
++) {
592 if (key1
->fields
.structure
[i
].type
!= key2
->fields
.structure
[i
].type
)
594 if (strcmp(key1
->fields
.structure
[i
].name
,
595 key2
->fields
.structure
[i
].name
) != 0)
597 if (key1
->fields
.structure
[i
].row_major
598 != key2
->fields
.structure
[i
].row_major
)
607 glsl_type::record_key_hash(const void *a
)
609 const glsl_type
*const key
= (glsl_type
*) a
;
613 size
= snprintf(hash_key
, sizeof(hash_key
), "%08x", key
->length
);
615 for (unsigned i
= 0; i
< key
->length
; i
++) {
616 if (size
>= sizeof(hash_key
))
619 size
+= snprintf(& hash_key
[size
], sizeof(hash_key
) - size
,
620 "%p", (void *) key
->fields
.structure
[i
].type
);
623 return hash_table_string_hash(& hash_key
);
628 glsl_type::get_record_instance(const glsl_struct_field
*fields
,
632 const glsl_type
key(fields
, num_fields
, name
);
634 if (record_types
== NULL
) {
635 record_types
= hash_table_ctor(64, record_key_hash
, record_key_compare
);
638 const glsl_type
*t
= (glsl_type
*) hash_table_find(record_types
, & key
);
640 t
= new glsl_type(fields
, num_fields
, name
);
642 hash_table_insert(record_types
, (void *) t
, t
);
645 assert(t
->base_type
== GLSL_TYPE_STRUCT
);
646 assert(t
->length
== num_fields
);
647 assert(strcmp(t
->name
, name
) == 0);
654 glsl_type::get_interface_instance(const glsl_struct_field
*fields
,
656 enum glsl_interface_packing packing
,
659 const glsl_type
key(fields
, num_fields
, packing
, name
);
661 if (interface_types
== NULL
) {
662 interface_types
= hash_table_ctor(64, record_key_hash
, record_key_compare
);
665 const glsl_type
*t
= (glsl_type
*) hash_table_find(interface_types
, & key
);
667 t
= new glsl_type(fields
, num_fields
, packing
, name
);
669 hash_table_insert(interface_types
, (void *) t
, t
);
672 assert(t
->base_type
== GLSL_TYPE_INTERFACE
);
673 assert(t
->length
== num_fields
);
674 assert(strcmp(t
->name
, name
) == 0);
681 glsl_type::field_type(const char *name
) const
683 if (this->base_type
!= GLSL_TYPE_STRUCT
684 && this->base_type
!= GLSL_TYPE_INTERFACE
)
687 for (unsigned i
= 0; i
< this->length
; i
++) {
688 if (strcmp(name
, this->fields
.structure
[i
].name
) == 0)
689 return this->fields
.structure
[i
].type
;
697 glsl_type::field_index(const char *name
) const
699 if (this->base_type
!= GLSL_TYPE_STRUCT
700 && this->base_type
!= GLSL_TYPE_INTERFACE
)
703 for (unsigned i
= 0; i
< this->length
; i
++) {
704 if (strcmp(name
, this->fields
.structure
[i
].name
) == 0)
713 glsl_type::component_slots() const
715 switch (this->base_type
) {
718 case GLSL_TYPE_FLOAT
:
720 return this->components();
722 case GLSL_TYPE_STRUCT
:
723 case GLSL_TYPE_INTERFACE
: {
726 for (unsigned i
= 0; i
< this->length
; i
++)
727 size
+= this->fields
.structure
[i
].type
->component_slots();
732 case GLSL_TYPE_ARRAY
:
733 return this->length
* this->fields
.array
->component_slots();
735 case GLSL_TYPE_SAMPLER
:
737 case GLSL_TYPE_ERROR
:
745 glsl_type::can_implicitly_convert_to(const glsl_type
*desired
) const
750 /* There is no conversion among matrix types. */
751 if (this->matrix_columns
> 1 || desired
->matrix_columns
> 1)
754 /* int and uint can be converted to float. */
755 return desired
->is_float()
756 && this->is_integer()
757 && this->vector_elements
== desired
->vector_elements
;
761 glsl_type::std140_base_alignment(bool row_major
) const
763 /* (1) If the member is a scalar consuming <N> basic machine units, the
764 * base alignment is <N>.
766 * (2) If the member is a two- or four-component vector with components
767 * consuming <N> basic machine units, the base alignment is 2<N> or
768 * 4<N>, respectively.
770 * (3) If the member is a three-component vector with components consuming
771 * <N> basic machine units, the base alignment is 4<N>.
773 if (this->is_scalar() || this->is_vector()) {
774 switch (this->vector_elements
) {
785 /* (4) If the member is an array of scalars or vectors, the base alignment
786 * and array stride are set to match the base alignment of a single
787 * array element, according to rules (1), (2), and (3), and rounded up
788 * to the base alignment of a vec4. The array may have padding at the
789 * end; the base offset of the member following the array is rounded up
790 * to the next multiple of the base alignment.
792 * (6) If the member is an array of <S> column-major matrices with <C>
793 * columns and <R> rows, the matrix is stored identically to a row of
794 * <S>*<C> column vectors with <R> components each, according to rule
797 * (8) If the member is an array of <S> row-major matrices with <C> columns
798 * and <R> rows, the matrix is stored identically to a row of <S>*<R>
799 * row vectors with <C> components each, according to rule (4).
801 * (10) If the member is an array of <S> structures, the <S> elements of
802 * the array are laid out in order, according to rule (9).
804 if (this->is_array()) {
805 if (this->fields
.array
->is_scalar() ||
806 this->fields
.array
->is_vector() ||
807 this->fields
.array
->is_matrix()) {
808 return MAX2(this->fields
.array
->std140_base_alignment(row_major
), 16);
810 assert(this->fields
.array
->is_record());
811 return this->fields
.array
->std140_base_alignment(row_major
);
815 /* (5) If the member is a column-major matrix with <C> columns and
816 * <R> rows, the matrix is stored identically to an array of
817 * <C> column vectors with <R> components each, according to
820 * (7) If the member is a row-major matrix with <C> columns and <R>
821 * rows, the matrix is stored identically to an array of <R>
822 * row vectors with <C> components each, according to rule (4).
824 if (this->is_matrix()) {
825 const struct glsl_type
*vec_type
, *array_type
;
826 int c
= this->matrix_columns
;
827 int r
= this->vector_elements
;
830 vec_type
= get_instance(GLSL_TYPE_FLOAT
, c
, 1);
831 array_type
= glsl_type::get_array_instance(vec_type
, r
);
833 vec_type
= get_instance(GLSL_TYPE_FLOAT
, r
, 1);
834 array_type
= glsl_type::get_array_instance(vec_type
, c
);
837 return array_type
->std140_base_alignment(false);
840 /* (9) If the member is a structure, the base alignment of the
841 * structure is <N>, where <N> is the largest base alignment
842 * value of any of its members, and rounded up to the base
843 * alignment of a vec4. The individual members of this
844 * sub-structure are then assigned offsets by applying this set
845 * of rules recursively, where the base offset of the first
846 * member of the sub-structure is equal to the aligned offset
847 * of the structure. The structure may have padding at the end;
848 * the base offset of the member following the sub-structure is
849 * rounded up to the next multiple of the base alignment of the
852 if (this->is_record()) {
853 unsigned base_alignment
= 16;
854 for (unsigned i
= 0; i
< this->length
; i
++) {
855 const struct glsl_type
*field_type
= this->fields
.structure
[i
].type
;
856 base_alignment
= MAX2(base_alignment
,
857 field_type
->std140_base_alignment(row_major
));
859 return base_alignment
;
862 assert(!"not reached");
867 glsl_type::std140_size(bool row_major
) const
869 /* (1) If the member is a scalar consuming <N> basic machine units, the
870 * base alignment is <N>.
872 * (2) If the member is a two- or four-component vector with components
873 * consuming <N> basic machine units, the base alignment is 2<N> or
874 * 4<N>, respectively.
876 * (3) If the member is a three-component vector with components consuming
877 * <N> basic machine units, the base alignment is 4<N>.
879 if (this->is_scalar() || this->is_vector()) {
880 return this->vector_elements
* 4;
883 /* (5) If the member is a column-major matrix with <C> columns and
884 * <R> rows, the matrix is stored identically to an array of
885 * <C> column vectors with <R> components each, according to
888 * (6) If the member is an array of <S> column-major matrices with <C>
889 * columns and <R> rows, the matrix is stored identically to a row of
890 * <S>*<C> column vectors with <R> components each, according to rule
893 * (7) If the member is a row-major matrix with <C> columns and <R>
894 * rows, the matrix is stored identically to an array of <R>
895 * row vectors with <C> components each, according to rule (4).
897 * (8) If the member is an array of <S> row-major matrices with <C> columns
898 * and <R> rows, the matrix is stored identically to a row of <S>*<R>
899 * row vectors with <C> components each, according to rule (4).
901 if (this->is_matrix() || (this->is_array() &&
902 this->fields
.array
->is_matrix())) {
903 const struct glsl_type
*element_type
;
904 const struct glsl_type
*vec_type
;
905 unsigned int array_len
;
907 if (this->is_array()) {
908 element_type
= this->fields
.array
;
909 array_len
= this->length
;
916 vec_type
= get_instance(GLSL_TYPE_FLOAT
,
917 element_type
->matrix_columns
, 1);
918 array_len
*= element_type
->vector_elements
;
920 vec_type
= get_instance(GLSL_TYPE_FLOAT
,
921 element_type
->vector_elements
, 1);
922 array_len
*= element_type
->matrix_columns
;
924 const glsl_type
*array_type
= glsl_type::get_array_instance(vec_type
,
927 return array_type
->std140_size(false);
930 /* (4) If the member is an array of scalars or vectors, the base alignment
931 * and array stride are set to match the base alignment of a single
932 * array element, according to rules (1), (2), and (3), and rounded up
933 * to the base alignment of a vec4. The array may have padding at the
934 * end; the base offset of the member following the array is rounded up
935 * to the next multiple of the base alignment.
937 * (10) If the member is an array of <S> structures, the <S> elements of
938 * the array are laid out in order, according to rule (9).
940 if (this->is_array()) {
941 if (this->fields
.array
->is_record()) {
942 return this->length
* this->fields
.array
->std140_size(row_major
);
944 unsigned element_base_align
=
945 this->fields
.array
->std140_base_alignment(row_major
);
946 return this->length
* MAX2(element_base_align
, 16);
950 /* (9) If the member is a structure, the base alignment of the
951 * structure is <N>, where <N> is the largest base alignment
952 * value of any of its members, and rounded up to the base
953 * alignment of a vec4. The individual members of this
954 * sub-structure are then assigned offsets by applying this set
955 * of rules recursively, where the base offset of the first
956 * member of the sub-structure is equal to the aligned offset
957 * of the structure. The structure may have padding at the end;
958 * the base offset of the member following the sub-structure is
959 * rounded up to the next multiple of the base alignment of the
962 if (this->is_record()) {
964 for (unsigned i
= 0; i
< this->length
; i
++) {
965 const struct glsl_type
*field_type
= this->fields
.structure
[i
].type
;
966 unsigned align
= field_type
->std140_base_alignment(row_major
);
967 size
= glsl_align(size
, align
);
968 size
+= field_type
->std140_size(row_major
);
970 size
= glsl_align(size
,
971 this->fields
.structure
[0].type
->std140_base_alignment(row_major
));
975 assert(!"not reached");