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 void *glsl_type::mem_ctx
= NULL
;
40 glsl_type::init_ralloc_type_ctx(void)
42 if (glsl_type::mem_ctx
== NULL
) {
43 glsl_type::mem_ctx
= ralloc_autofree_context();
44 assert(glsl_type::mem_ctx
!= NULL
);
48 glsl_type::glsl_type(GLenum gl_type
,
49 glsl_base_type base_type
, unsigned vector_elements
,
50 unsigned matrix_columns
, const char *name
) :
53 sampler_dimensionality(0), sampler_shadow(0), sampler_array(0),
55 vector_elements(vector_elements
), matrix_columns(matrix_columns
),
58 init_ralloc_type_ctx();
59 this->name
= ralloc_strdup(this->mem_ctx
, name
);
60 /* Neither dimension is zero or both dimensions are zero.
62 assert((vector_elements
== 0) == (matrix_columns
== 0));
63 memset(& fields
, 0, sizeof(fields
));
66 glsl_type::glsl_type(GLenum gl_type
,
67 enum glsl_sampler_dim dim
, bool shadow
, bool array
,
68 unsigned type
, const char *name
) :
70 base_type(GLSL_TYPE_SAMPLER
),
71 sampler_dimensionality(dim
), sampler_shadow(shadow
),
72 sampler_array(array
), sampler_type(type
),
73 vector_elements(0), matrix_columns(0),
76 init_ralloc_type_ctx();
77 this->name
= ralloc_strdup(this->mem_ctx
, name
);
78 memset(& fields
, 0, sizeof(fields
));
81 glsl_type::glsl_type(const glsl_struct_field
*fields
, unsigned num_fields
,
83 base_type(GLSL_TYPE_STRUCT
),
84 sampler_dimensionality(0), sampler_shadow(0), sampler_array(0),
86 vector_elements(0), matrix_columns(0),
91 init_ralloc_type_ctx();
92 this->name
= ralloc_strdup(this->mem_ctx
, name
);
93 this->fields
.structure
= ralloc_array(this->mem_ctx
,
94 glsl_struct_field
, length
);
95 for (i
= 0; i
< length
; i
++) {
96 this->fields
.structure
[i
].type
= fields
[i
].type
;
97 this->fields
.structure
[i
].name
= ralloc_strdup(this->fields
.structure
,
103 add_types_to_symbol_table(glsl_symbol_table
*symtab
,
104 const struct glsl_type
*types
,
105 unsigned num_types
, bool warn
)
109 for (unsigned i
= 0; i
< num_types
; i
++) {
110 symtab
->add_type(types
[i
].name
, & types
[i
]);
115 glsl_type::contains_sampler() const
117 if (this->is_array()) {
118 return this->fields
.array
->contains_sampler();
119 } else if (this->is_record()) {
120 for (unsigned int i
= 0; i
< this->length
; i
++) {
121 if (this->fields
.structure
[i
].type
->contains_sampler())
126 return this->is_sampler();
131 glsl_type::sampler_index() const
133 const glsl_type
*const t
= (this->is_array()) ? this->fields
.array
: this;
135 assert(t
->is_sampler());
137 switch (t
->sampler_dimensionality
) {
138 case GLSL_SAMPLER_DIM_1D
:
139 return (t
->sampler_array
) ? TEXTURE_1D_ARRAY_INDEX
: TEXTURE_1D_INDEX
;
140 case GLSL_SAMPLER_DIM_2D
:
141 return (t
->sampler_array
) ? TEXTURE_2D_ARRAY_INDEX
: TEXTURE_2D_INDEX
;
142 case GLSL_SAMPLER_DIM_3D
:
143 return TEXTURE_3D_INDEX
;
144 case GLSL_SAMPLER_DIM_CUBE
:
145 return (t
->sampler_array
) ? TEXTURE_CUBE_ARRAY_INDEX
: TEXTURE_CUBE_INDEX
;
146 case GLSL_SAMPLER_DIM_RECT
:
147 return TEXTURE_RECT_INDEX
;
148 case GLSL_SAMPLER_DIM_BUF
:
149 return TEXTURE_BUFFER_INDEX
;
150 case GLSL_SAMPLER_DIM_EXTERNAL
:
151 return TEXTURE_EXTERNAL_INDEX
;
153 assert(!"Should not get here.");
154 return TEXTURE_BUFFER_INDEX
;
159 glsl_type::generate_100ES_types(glsl_symbol_table
*symtab
)
161 add_types_to_symbol_table(symtab
, builtin_core_types
,
162 Elements(builtin_core_types
),
164 add_types_to_symbol_table(symtab
, builtin_structure_types
,
165 Elements(builtin_structure_types
),
167 add_types_to_symbol_table(symtab
, void_type
, 1, false);
171 glsl_type::generate_110_types(glsl_symbol_table
*symtab
, bool add_deprecated
)
173 generate_100ES_types(symtab
);
175 add_types_to_symbol_table(symtab
, builtin_110_types
,
176 Elements(builtin_110_types
),
178 add_types_to_symbol_table(symtab
, &_sampler3D_type
, 1, false);
179 if (add_deprecated
) {
180 add_types_to_symbol_table(symtab
, builtin_110_deprecated_structure_types
,
181 Elements(builtin_110_deprecated_structure_types
),
188 glsl_type::generate_120_types(glsl_symbol_table
*symtab
, bool add_deprecated
)
190 generate_110_types(symtab
, add_deprecated
);
192 add_types_to_symbol_table(symtab
, builtin_120_types
,
193 Elements(builtin_120_types
), false);
198 glsl_type::generate_130_types(glsl_symbol_table
*symtab
, bool add_deprecated
)
200 generate_120_types(symtab
, add_deprecated
);
202 add_types_to_symbol_table(symtab
, builtin_130_types
,
203 Elements(builtin_130_types
), false);
204 generate_EXT_texture_array_types(symtab
, false);
209 glsl_type::generate_140_types(glsl_symbol_table
*symtab
)
211 generate_130_types(symtab
, false);
213 add_types_to_symbol_table(symtab
, builtin_140_types
,
214 Elements(builtin_140_types
), false);
216 add_types_to_symbol_table(symtab
, builtin_EXT_texture_buffer_object_types
,
217 Elements(builtin_EXT_texture_buffer_object_types
),
223 glsl_type::generate_ARB_texture_rectangle_types(glsl_symbol_table
*symtab
,
226 add_types_to_symbol_table(symtab
, builtin_ARB_texture_rectangle_types
,
227 Elements(builtin_ARB_texture_rectangle_types
),
233 glsl_type::generate_EXT_texture_array_types(glsl_symbol_table
*symtab
,
236 add_types_to_symbol_table(symtab
, builtin_EXT_texture_array_types
,
237 Elements(builtin_EXT_texture_array_types
),
243 glsl_type::generate_OES_texture_3D_types(glsl_symbol_table
*symtab
, bool warn
)
245 add_types_to_symbol_table(symtab
, &_sampler3D_type
, 1, warn
);
250 glsl_type::generate_OES_EGL_image_external_types(glsl_symbol_table
*symtab
,
253 add_types_to_symbol_table(symtab
, builtin_OES_EGL_image_external_types
,
254 Elements(builtin_OES_EGL_image_external_types
),
259 glsl_type::generate_ARB_texture_cube_map_array_types(glsl_symbol_table
*symtab
,
262 add_types_to_symbol_table(symtab
, builtin_ARB_texture_cube_map_array_types
,
263 Elements(builtin_ARB_texture_cube_map_array_types
),
268 _mesa_glsl_initialize_types(struct _mesa_glsl_parse_state
*state
)
270 switch (state
->language_version
) {
272 assert(state
->es_shader
);
273 glsl_type::generate_100ES_types(state
->symbols
);
276 glsl_type::generate_110_types(state
->symbols
, true);
279 glsl_type::generate_120_types(state
->symbols
, true);
282 glsl_type::generate_130_types(state
->symbols
, true);
285 glsl_type::generate_140_types(state
->symbols
);
292 if (state
->ARB_texture_rectangle_enable
||
293 state
->language_version
>= 140) {
294 glsl_type::generate_ARB_texture_rectangle_types(state
->symbols
,
295 state
->ARB_texture_rectangle_warn
);
297 if (state
->OES_texture_3D_enable
&& state
->language_version
== 100) {
298 glsl_type::generate_OES_texture_3D_types(state
->symbols
,
299 state
->OES_texture_3D_warn
);
302 if (state
->EXT_texture_array_enable
&& state
->language_version
< 130) {
303 // These are already included in 130; don't create twice.
304 glsl_type::generate_EXT_texture_array_types(state
->symbols
,
305 state
->EXT_texture_array_warn
);
308 /* We cannot check for language_version == 100 here because we need the
309 * types to support fixed-function program generation. But this is fine
310 * since the extension is never enabled for OpenGL contexts.
312 if (state
->OES_EGL_image_external_enable
) {
313 glsl_type::generate_OES_EGL_image_external_types(state
->symbols
,
314 state
->OES_EGL_image_external_warn
);
317 if (state
->ARB_texture_cube_map_array_enable
) {
318 glsl_type::generate_ARB_texture_cube_map_array_types(state
->symbols
,
319 state
->ARB_texture_cube_map_array_warn
);
324 const glsl_type
*glsl_type::get_base_type() const
331 case GLSL_TYPE_FLOAT
:
341 const glsl_type
*glsl_type::get_scalar_type() const
343 const glsl_type
*type
= this;
346 while (type
->base_type
== GLSL_TYPE_ARRAY
)
347 type
= type
->fields
.array
;
349 /* Handle vectors and matrices */
350 switch (type
->base_type
) {
355 case GLSL_TYPE_FLOAT
:
358 /* Handle everything else */
365 _mesa_glsl_release_types(void)
367 if (glsl_type::array_types
!= NULL
) {
368 hash_table_dtor(glsl_type::array_types
);
369 glsl_type::array_types
= NULL
;
372 if (glsl_type::record_types
!= NULL
) {
373 hash_table_dtor(glsl_type::record_types
);
374 glsl_type::record_types
= NULL
;
379 glsl_type::glsl_type(const glsl_type
*array
, unsigned length
) :
380 base_type(GLSL_TYPE_ARRAY
),
381 sampler_dimensionality(0), sampler_shadow(0), sampler_array(0),
383 vector_elements(0), matrix_columns(0),
384 name(NULL
), length(length
)
386 this->fields
.array
= array
;
387 /* Inherit the gl type of the base. The GL type is used for
388 * uniform/statevar handling in Mesa and the arrayness of the type
389 * is represented by the size rather than the type.
391 this->gl_type
= array
->gl_type
;
393 /* Allow a maximum of 10 characters for the array size. This is enough
394 * for 32-bits of ~0. The extra 3 are for the '[', ']', and terminating
397 const unsigned name_length
= strlen(array
->name
) + 10 + 3;
398 char *const n
= (char *) ralloc_size(this->mem_ctx
, name_length
);
401 snprintf(n
, name_length
, "%s[]", array
->name
);
403 snprintf(n
, name_length
, "%s[%u]", array
->name
, length
);
410 glsl_type::get_instance(unsigned base_type
, unsigned rows
, unsigned columns
)
412 if (base_type
== GLSL_TYPE_VOID
)
415 if ((rows
< 1) || (rows
> 4) || (columns
< 1) || (columns
> 4))
418 /* Treat GLSL vectors as Nx1 matrices.
423 return uint_type
+ (rows
- 1);
425 return int_type
+ (rows
- 1);
426 case GLSL_TYPE_FLOAT
:
427 return float_type
+ (rows
- 1);
429 return bool_type
+ (rows
- 1);
434 if ((base_type
!= GLSL_TYPE_FLOAT
) || (rows
== 1))
437 /* GLSL matrix types are named mat{COLUMNS}x{ROWS}. Only the following
438 * combinations are valid:
446 #define IDX(c,r) (((c-1)*3) + (r-1))
448 switch (IDX(columns
, rows
)) {
449 case IDX(2,2): return mat2_type
;
450 case IDX(2,3): return mat2x3_type
;
451 case IDX(2,4): return mat2x4_type
;
452 case IDX(3,2): return mat3x2_type
;
453 case IDX(3,3): return mat3_type
;
454 case IDX(3,4): return mat3x4_type
;
455 case IDX(4,2): return mat4x2_type
;
456 case IDX(4,3): return mat4x3_type
;
457 case IDX(4,4): return mat4_type
;
458 default: return error_type
;
462 assert(!"Should not get here.");
468 glsl_type::get_array_instance(const glsl_type
*base
, unsigned array_size
)
471 if (array_types
== NULL
) {
472 array_types
= hash_table_ctor(64, hash_table_string_hash
,
473 hash_table_string_compare
);
476 /* Generate a name using the base type pointer in the key. This is
477 * done because the name of the base type may not be unique across
478 * shaders. For example, two shaders may have different record types
482 snprintf(key
, sizeof(key
), "%p[%u]", (void *) base
, array_size
);
484 const glsl_type
*t
= (glsl_type
*) hash_table_find(array_types
, key
);
486 t
= new glsl_type(base
, array_size
);
488 hash_table_insert(array_types
, (void *) t
, ralloc_strdup(mem_ctx
, key
));
491 assert(t
->base_type
== GLSL_TYPE_ARRAY
);
492 assert(t
->length
== array_size
);
493 assert(t
->fields
.array
== base
);
500 glsl_type::record_key_compare(const void *a
, const void *b
)
502 const glsl_type
*const key1
= (glsl_type
*) a
;
503 const glsl_type
*const key2
= (glsl_type
*) b
;
505 /* Return zero is the types match (there is zero difference) or non-zero
508 if (strcmp(key1
->name
, key2
->name
) != 0)
511 if (key1
->length
!= key2
->length
)
514 for (unsigned i
= 0; i
< key1
->length
; i
++) {
515 if (key1
->fields
.structure
[i
].type
!= key2
->fields
.structure
[i
].type
)
517 if (strcmp(key1
->fields
.structure
[i
].name
,
518 key2
->fields
.structure
[i
].name
) != 0)
527 glsl_type::record_key_hash(const void *a
)
529 const glsl_type
*const key
= (glsl_type
*) a
;
533 size
= snprintf(hash_key
, sizeof(hash_key
), "%08x", key
->length
);
535 for (unsigned i
= 0; i
< key
->length
; i
++) {
536 if (size
>= sizeof(hash_key
))
539 size
+= snprintf(& hash_key
[size
], sizeof(hash_key
) - size
,
540 "%p", (void *) key
->fields
.structure
[i
].type
);
543 return hash_table_string_hash(& hash_key
);
548 glsl_type::get_record_instance(const glsl_struct_field
*fields
,
552 const glsl_type
key(fields
, num_fields
, name
);
554 if (record_types
== NULL
) {
555 record_types
= hash_table_ctor(64, record_key_hash
, record_key_compare
);
558 const glsl_type
*t
= (glsl_type
*) hash_table_find(record_types
, & key
);
560 t
= new glsl_type(fields
, num_fields
, name
);
562 hash_table_insert(record_types
, (void *) t
, t
);
565 assert(t
->base_type
== GLSL_TYPE_STRUCT
);
566 assert(t
->length
== num_fields
);
567 assert(strcmp(t
->name
, name
) == 0);
574 glsl_type::field_type(const char *name
) const
576 if (this->base_type
!= GLSL_TYPE_STRUCT
)
579 for (unsigned i
= 0; i
< this->length
; i
++) {
580 if (strcmp(name
, this->fields
.structure
[i
].name
) == 0)
581 return this->fields
.structure
[i
].type
;
589 glsl_type::field_index(const char *name
) const
591 if (this->base_type
!= GLSL_TYPE_STRUCT
)
594 for (unsigned i
= 0; i
< this->length
; i
++) {
595 if (strcmp(name
, this->fields
.structure
[i
].name
) == 0)
604 glsl_type::component_slots() const
606 switch (this->base_type
) {
609 case GLSL_TYPE_FLOAT
:
611 return this->components();
613 case GLSL_TYPE_STRUCT
: {
616 for (unsigned i
= 0; i
< this->length
; i
++)
617 size
+= this->fields
.structure
[i
].type
->component_slots();
622 case GLSL_TYPE_ARRAY
:
623 return this->length
* this->fields
.array
->component_slots();
631 glsl_type::can_implicitly_convert_to(const glsl_type
*desired
) const
636 /* There is no conversion among matrix types. */
637 if (this->matrix_columns
> 1 || desired
->matrix_columns
> 1)
640 /* int and uint can be converted to float. */
641 return desired
->is_float()
642 && this->is_integer()
643 && this->vector_elements
== desired
->vector_elements
;
647 glsl_type::std140_base_alignment(bool row_major
) const
649 /* (1) If the member is a scalar consuming <N> basic machine units, the
650 * base alignment is <N>.
652 * (2) If the member is a two- or four-component vector with components
653 * consuming <N> basic machine units, the base alignment is 2<N> or
654 * 4<N>, respectively.
656 * (3) If the member is a three-component vector with components consuming
657 * <N> basic machine units, the base alignment is 4<N>.
659 if (this->is_scalar() || this->is_vector()) {
660 switch (this->vector_elements
) {
671 /* (4) If the member is an array of scalars or vectors, the base alignment
672 * and array stride are set to match the base alignment of a single
673 * array element, according to rules (1), (2), and (3), and rounded up
674 * to the base alignment of a vec4. The array may have padding at the
675 * end; the base offset of the member following the array is rounded up
676 * to the next multiple of the base alignment.
678 * (6) If the member is an array of <S> column-major matrices with <C>
679 * columns and <R> rows, the matrix is stored identically to a row of
680 * <S>*<C> column vectors with <R> components each, according to rule
683 * (8) If the member is an array of <S> row-major matrices with <C> columns
684 * and <R> rows, the matrix is stored identically to a row of <S>*<R>
685 * row vectors with <C> components each, according to rule (4).
687 * (10) If the member is an array of <S> structures, the <S> elements of
688 * the array are laid out in order, according to rule (9).
690 if (this->is_array()) {
691 if (this->fields
.array
->is_scalar() ||
692 this->fields
.array
->is_vector() ||
693 this->fields
.array
->is_matrix()) {
694 return MAX2(this->fields
.array
->std140_base_alignment(row_major
), 16);
696 assert(this->fields
.array
->is_record());
697 return this->fields
.array
->std140_base_alignment(row_major
);
701 /* (5) If the member is a column-major matrix with <C> columns and
702 * <R> rows, the matrix is stored identically to an array of
703 * <C> column vectors with <R> components each, according to
706 * (7) If the member is a row-major matrix with <C> columns and <R>
707 * rows, the matrix is stored identically to an array of <R>
708 * row vectors with <C> components each, according to rule (4).
710 if (this->is_matrix()) {
711 const struct glsl_type
*vec_type
, *array_type
;
712 int c
= this->matrix_columns
;
713 int r
= this->vector_elements
;
716 vec_type
= get_instance(GLSL_TYPE_FLOAT
, c
, 1);
717 array_type
= glsl_type::get_array_instance(vec_type
, r
);
719 vec_type
= get_instance(GLSL_TYPE_FLOAT
, r
, 1);
720 array_type
= glsl_type::get_array_instance(vec_type
, c
);
723 return array_type
->std140_base_alignment(false);
726 /* (9) If the member is a structure, the base alignment of the
727 * structure is <N>, where <N> is the largest base alignment
728 * value of any of its members, and rounded up to the base
729 * alignment of a vec4. The individual members of this
730 * sub-structure are then assigned offsets by applying this set
731 * of rules recursively, where the base offset of the first
732 * member of the sub-structure is equal to the aligned offset
733 * of the structure. The structure may have padding at the end;
734 * the base offset of the member following the sub-structure is
735 * rounded up to the next multiple of the base alignment of the
738 if (this->is_record()) {
739 unsigned base_alignment
= 16;
740 for (unsigned i
= 0; i
< this->length
; i
++) {
741 const struct glsl_type
*field_type
= this->fields
.structure
[i
].type
;
742 base_alignment
= MAX2(base_alignment
,
743 field_type
->std140_base_alignment(row_major
));
745 return base_alignment
;
748 assert(!"not reached");
753 align(unsigned val
, unsigned align
)
755 return (val
+ align
- 1) / align
* align
;
759 glsl_type::std140_size(bool row_major
) const
761 /* (1) If the member is a scalar consuming <N> basic machine units, the
762 * base alignment is <N>.
764 * (2) If the member is a two- or four-component vector with components
765 * consuming <N> basic machine units, the base alignment is 2<N> or
766 * 4<N>, respectively.
768 * (3) If the member is a three-component vector with components consuming
769 * <N> basic machine units, the base alignment is 4<N>.
771 if (this->is_scalar() || this->is_vector()) {
772 return this->vector_elements
* 4;
775 /* (5) If the member is a column-major matrix with <C> columns and
776 * <R> rows, the matrix is stored identically to an array of
777 * <C> column vectors with <R> components each, according to
780 * (6) If the member is an array of <S> column-major matrices with <C>
781 * columns and <R> rows, the matrix is stored identically to a row of
782 * <S>*<C> column vectors with <R> components each, according to rule
785 * (7) If the member is a row-major matrix with <C> columns and <R>
786 * rows, the matrix is stored identically to an array of <R>
787 * row vectors with <C> components each, according to rule (4).
789 * (8) If the member is an array of <S> row-major matrices with <C> columns
790 * and <R> rows, the matrix is stored identically to a row of <S>*<R>
791 * row vectors with <C> components each, according to rule (4).
793 if (this->is_matrix() || (this->is_array() &&
794 this->fields
.array
->is_matrix())) {
795 const struct glsl_type
*element_type
;
796 const struct glsl_type
*vec_type
;
797 unsigned int array_len
;
799 if (this->is_array()) {
800 element_type
= this->fields
.array
;
801 array_len
= this->length
;
808 vec_type
= get_instance(GLSL_TYPE_FLOAT
,
809 element_type
->matrix_columns
, 1);
810 array_len
*= element_type
->vector_elements
;
812 vec_type
= get_instance(GLSL_TYPE_FLOAT
,
813 element_type
->vector_elements
, 1);
814 array_len
*= element_type
->matrix_columns
;
816 const glsl_type
*array_type
= glsl_type::get_array_instance(vec_type
,
819 return array_type
->std140_size(false);
822 /* (4) If the member is an array of scalars or vectors, the base alignment
823 * and array stride are set to match the base alignment of a single
824 * array element, according to rules (1), (2), and (3), and rounded up
825 * to the base alignment of a vec4. The array may have padding at the
826 * end; the base offset of the member following the array is rounded up
827 * to the next multiple of the base alignment.
829 * (10) If the member is an array of <S> structures, the <S> elements of
830 * the array are laid out in order, according to rule (9).
832 if (this->is_array()) {
833 if (this->fields
.array
->is_record()) {
834 return this->length
* this->fields
.array
->std140_size(row_major
);
836 unsigned element_base_align
=
837 this->fields
.array
->std140_base_alignment(row_major
);
838 return this->length
* MAX2(element_base_align
, 16);
842 /* (9) If the member is a structure, the base alignment of the
843 * structure is <N>, where <N> is the largest base alignment
844 * value of any of its members, and rounded up to the base
845 * alignment of a vec4. The individual members of this
846 * sub-structure are then assigned offsets by applying this set
847 * of rules recursively, where the base offset of the first
848 * member of the sub-structure is equal to the aligned offset
849 * of the structure. The structure may have padding at the end;
850 * the base offset of the member following the sub-structure is
851 * rounded up to the next multiple of the base alignment of the
854 if (this->is_record()) {
856 for (unsigned i
= 0; i
< this->length
; i
++) {
857 const struct glsl_type
*field_type
= this->fields
.structure
[i
].type
;
858 unsigned align
= field_type
->std140_base_alignment(row_major
);
859 size
= (size
+ align
- 1) / align
* align
;
860 size
+= field_type
->std140_size(row_major
);
863 this->fields
.structure
[0].type
->std140_base_alignment(row_major
));
867 assert(!"not reached");