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"
31 #include "program/hash_table.h"
34 hash_table
*glsl_type::array_types
= NULL
;
35 hash_table
*glsl_type::record_types
= NULL
;
36 hash_table
*glsl_type::interface_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),
54 sampler_type(0), interface_packing(0),
55 vector_elements(vector_elements
), matrix_columns(matrix_columns
),
58 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();
79 this->name
= ralloc_strdup(this->mem_ctx
, name
);
80 memset(& fields
, 0, sizeof(fields
));
83 glsl_type::glsl_type(const glsl_struct_field
*fields
, unsigned num_fields
,
86 base_type(GLSL_TYPE_STRUCT
),
87 sampler_dimensionality(0), sampler_shadow(0), sampler_array(0),
88 sampler_type(0), interface_packing(0),
89 vector_elements(0), matrix_columns(0),
94 init_ralloc_type_ctx();
96 this->name
= ralloc_strdup(this->mem_ctx
, name
);
97 this->fields
.structure
= ralloc_array(this->mem_ctx
,
98 glsl_struct_field
, length
);
99 for (i
= 0; i
< length
; i
++) {
100 this->fields
.structure
[i
].type
= fields
[i
].type
;
101 this->fields
.structure
[i
].name
= ralloc_strdup(this->fields
.structure
,
103 this->fields
.structure
[i
].location
= fields
[i
].location
;
104 this->fields
.structure
[i
].interpolation
= fields
[i
].interpolation
;
105 this->fields
.structure
[i
].centroid
= fields
[i
].centroid
;
106 this->fields
.structure
[i
].row_major
= fields
[i
].row_major
;
110 glsl_type::glsl_type(const glsl_struct_field
*fields
, unsigned num_fields
,
111 enum glsl_interface_packing packing
, const char *name
) :
113 base_type(GLSL_TYPE_INTERFACE
),
114 sampler_dimensionality(0), sampler_shadow(0), sampler_array(0),
115 sampler_type(0), interface_packing((unsigned) packing
),
116 vector_elements(0), matrix_columns(0),
121 init_ralloc_type_ctx();
122 assert(name
!= NULL
);
123 this->name
= ralloc_strdup(this->mem_ctx
, name
);
124 this->fields
.structure
= ralloc_array(this->mem_ctx
,
125 glsl_struct_field
, length
);
126 for (i
= 0; i
< length
; i
++) {
127 this->fields
.structure
[i
].type
= fields
[i
].type
;
128 this->fields
.structure
[i
].name
= ralloc_strdup(this->fields
.structure
,
130 this->fields
.structure
[i
].location
= fields
[i
].location
;
131 this->fields
.structure
[i
].interpolation
= fields
[i
].interpolation
;
132 this->fields
.structure
[i
].centroid
= fields
[i
].centroid
;
133 this->fields
.structure
[i
].row_major
= fields
[i
].row_major
;
139 glsl_type::contains_sampler() const
141 if (this->is_array()) {
142 return this->fields
.array
->contains_sampler();
143 } else if (this->is_record()) {
144 for (unsigned int i
= 0; i
< this->length
; i
++) {
145 if (this->fields
.structure
[i
].type
->contains_sampler())
150 return this->is_sampler();
156 glsl_type::contains_integer() const
158 if (this->is_array()) {
159 return this->fields
.array
->contains_integer();
160 } else if (this->is_record()) {
161 for (unsigned int i
= 0; i
< this->length
; i
++) {
162 if (this->fields
.structure
[i
].type
->contains_integer())
167 return this->is_integer();
173 glsl_type::sampler_index() const
175 const glsl_type
*const t
= (this->is_array()) ? this->fields
.array
: this;
177 assert(t
->is_sampler());
179 switch (t
->sampler_dimensionality
) {
180 case GLSL_SAMPLER_DIM_1D
:
181 return (t
->sampler_array
) ? TEXTURE_1D_ARRAY_INDEX
: TEXTURE_1D_INDEX
;
182 case GLSL_SAMPLER_DIM_2D
:
183 return (t
->sampler_array
) ? TEXTURE_2D_ARRAY_INDEX
: TEXTURE_2D_INDEX
;
184 case GLSL_SAMPLER_DIM_3D
:
185 return TEXTURE_3D_INDEX
;
186 case GLSL_SAMPLER_DIM_CUBE
:
187 return (t
->sampler_array
) ? TEXTURE_CUBE_ARRAY_INDEX
: TEXTURE_CUBE_INDEX
;
188 case GLSL_SAMPLER_DIM_RECT
:
189 return TEXTURE_RECT_INDEX
;
190 case GLSL_SAMPLER_DIM_BUF
:
191 return TEXTURE_BUFFER_INDEX
;
192 case GLSL_SAMPLER_DIM_EXTERNAL
:
193 return TEXTURE_EXTERNAL_INDEX
;
194 case GLSL_SAMPLER_DIM_MS
:
195 return (t
->sampler_array
) ? TEXTURE_2D_MULTISAMPLE_ARRAY_INDEX
: TEXTURE_2D_MULTISAMPLE_INDEX
;
197 assert(!"Should not get here.");
198 return TEXTURE_BUFFER_INDEX
;
203 const glsl_type
*glsl_type::get_base_type() const
210 case GLSL_TYPE_FLOAT
:
220 const glsl_type
*glsl_type::get_scalar_type() const
222 const glsl_type
*type
= this;
225 while (type
->base_type
== GLSL_TYPE_ARRAY
)
226 type
= type
->fields
.array
;
228 /* Handle vectors and matrices */
229 switch (type
->base_type
) {
234 case GLSL_TYPE_FLOAT
:
239 /* Handle everything else */
246 _mesa_glsl_release_types(void)
248 if (glsl_type::array_types
!= NULL
) {
249 hash_table_dtor(glsl_type::array_types
);
250 glsl_type::array_types
= NULL
;
253 if (glsl_type::record_types
!= NULL
) {
254 hash_table_dtor(glsl_type::record_types
);
255 glsl_type::record_types
= NULL
;
260 glsl_type::glsl_type(const glsl_type
*array
, unsigned length
) :
261 base_type(GLSL_TYPE_ARRAY
),
262 sampler_dimensionality(0), sampler_shadow(0), sampler_array(0),
263 sampler_type(0), interface_packing(0),
264 vector_elements(0), matrix_columns(0),
265 name(NULL
), length(length
)
267 this->fields
.array
= array
;
268 /* Inherit the gl type of the base. The GL type is used for
269 * uniform/statevar handling in Mesa and the arrayness of the type
270 * is represented by the size rather than the type.
272 this->gl_type
= array
->gl_type
;
274 /* Allow a maximum of 10 characters for the array size. This is enough
275 * for 32-bits of ~0. The extra 3 are for the '[', ']', and terminating
278 const unsigned name_length
= strlen(array
->name
) + 10 + 3;
279 char *const n
= (char *) ralloc_size(this->mem_ctx
, name_length
);
282 snprintf(n
, name_length
, "%s[]", array
->name
);
284 snprintf(n
, name_length
, "%s[%u]", array
->name
, length
);
291 glsl_type::vec(unsigned components
)
293 if (components
== 0 || components
> 4)
296 static const glsl_type
*const ts
[] = {
297 float_type
, vec2_type
, vec3_type
, vec4_type
299 return ts
[components
- 1];
304 glsl_type::ivec(unsigned components
)
306 if (components
== 0 || components
> 4)
309 static const glsl_type
*const ts
[] = {
310 int_type
, ivec2_type
, ivec3_type
, ivec4_type
312 return ts
[components
- 1];
317 glsl_type::uvec(unsigned components
)
319 if (components
== 0 || components
> 4)
322 static const glsl_type
*const ts
[] = {
323 uint_type
, uvec2_type
, uvec3_type
, uvec4_type
325 return ts
[components
- 1];
330 glsl_type::bvec(unsigned components
)
332 if (components
== 0 || components
> 4)
335 static const glsl_type
*const ts
[] = {
336 bool_type
, bvec2_type
, bvec3_type
, bvec4_type
338 return ts
[components
- 1];
343 glsl_type::get_instance(unsigned base_type
, unsigned rows
, unsigned columns
)
345 if (base_type
== GLSL_TYPE_VOID
)
348 if ((rows
< 1) || (rows
> 4) || (columns
< 1) || (columns
> 4))
351 /* Treat GLSL vectors as Nx1 matrices.
359 case GLSL_TYPE_FLOAT
:
367 if ((base_type
!= GLSL_TYPE_FLOAT
) || (rows
== 1))
370 /* GLSL matrix types are named mat{COLUMNS}x{ROWS}. Only the following
371 * combinations are valid:
379 #define IDX(c,r) (((c-1)*3) + (r-1))
381 switch (IDX(columns
, rows
)) {
382 case IDX(2,2): return mat2_type
;
383 case IDX(2,3): return mat2x3_type
;
384 case IDX(2,4): return mat2x4_type
;
385 case IDX(3,2): return mat3x2_type
;
386 case IDX(3,3): return mat3_type
;
387 case IDX(3,4): return mat3x4_type
;
388 case IDX(4,2): return mat4x2_type
;
389 case IDX(4,3): return mat4x3_type
;
390 case IDX(4,4): return mat4_type
;
391 default: return error_type
;
395 assert(!"Should not get here.");
401 glsl_type::get_array_instance(const glsl_type
*base
, unsigned array_size
)
404 if (array_types
== NULL
) {
405 array_types
= hash_table_ctor(64, hash_table_string_hash
,
406 hash_table_string_compare
);
409 /* Generate a name using the base type pointer in the key. This is
410 * done because the name of the base type may not be unique across
411 * shaders. For example, two shaders may have different record types
415 snprintf(key
, sizeof(key
), "%p[%u]", (void *) base
, array_size
);
417 const glsl_type
*t
= (glsl_type
*) hash_table_find(array_types
, key
);
419 t
= new glsl_type(base
, array_size
);
421 hash_table_insert(array_types
, (void *) t
, ralloc_strdup(mem_ctx
, key
));
424 assert(t
->base_type
== GLSL_TYPE_ARRAY
);
425 assert(t
->length
== array_size
);
426 assert(t
->fields
.array
== base
);
433 glsl_type::record_key_compare(const void *a
, const void *b
)
435 const glsl_type
*const key1
= (glsl_type
*) a
;
436 const glsl_type
*const key2
= (glsl_type
*) b
;
438 /* Return zero is the types match (there is zero difference) or non-zero
441 if (strcmp(key1
->name
, key2
->name
) != 0)
444 if (key1
->length
!= key2
->length
)
447 if (key1
->interface_packing
!= key2
->interface_packing
)
450 for (unsigned i
= 0; i
< key1
->length
; i
++) {
451 if (key1
->fields
.structure
[i
].type
!= key2
->fields
.structure
[i
].type
)
453 if (strcmp(key1
->fields
.structure
[i
].name
,
454 key2
->fields
.structure
[i
].name
) != 0)
456 if (key1
->fields
.structure
[i
].row_major
457 != key2
->fields
.structure
[i
].row_major
)
459 if (key1
->fields
.structure
[i
].location
460 != key2
->fields
.structure
[i
].location
)
462 if (key1
->fields
.structure
[i
].interpolation
463 != key2
->fields
.structure
[i
].interpolation
)
465 if (key1
->fields
.structure
[i
].centroid
466 != key2
->fields
.structure
[i
].centroid
)
475 glsl_type::record_key_hash(const void *a
)
477 const glsl_type
*const key
= (glsl_type
*) a
;
481 size
= snprintf(hash_key
, sizeof(hash_key
), "%08x", key
->length
);
483 for (unsigned i
= 0; i
< key
->length
; i
++) {
484 if (size
>= sizeof(hash_key
))
487 size
+= snprintf(& hash_key
[size
], sizeof(hash_key
) - size
,
488 "%p", (void *) key
->fields
.structure
[i
].type
);
491 return hash_table_string_hash(& hash_key
);
496 glsl_type::get_record_instance(const glsl_struct_field
*fields
,
500 const glsl_type
key(fields
, num_fields
, name
);
502 if (record_types
== NULL
) {
503 record_types
= hash_table_ctor(64, record_key_hash
, record_key_compare
);
506 const glsl_type
*t
= (glsl_type
*) hash_table_find(record_types
, & key
);
508 t
= new glsl_type(fields
, num_fields
, name
);
510 hash_table_insert(record_types
, (void *) t
, t
);
513 assert(t
->base_type
== GLSL_TYPE_STRUCT
);
514 assert(t
->length
== num_fields
);
515 assert(strcmp(t
->name
, name
) == 0);
522 glsl_type::get_interface_instance(const glsl_struct_field
*fields
,
524 enum glsl_interface_packing packing
,
525 const char *block_name
)
527 const glsl_type
key(fields
, num_fields
, packing
, block_name
);
529 if (interface_types
== NULL
) {
530 interface_types
= hash_table_ctor(64, record_key_hash
, record_key_compare
);
533 const glsl_type
*t
= (glsl_type
*) hash_table_find(interface_types
, & key
);
535 t
= new glsl_type(fields
, num_fields
, packing
, block_name
);
537 hash_table_insert(interface_types
, (void *) t
, t
);
540 assert(t
->base_type
== GLSL_TYPE_INTERFACE
);
541 assert(t
->length
== num_fields
);
542 assert(strcmp(t
->name
, block_name
) == 0);
549 glsl_type::field_type(const char *name
) const
551 if (this->base_type
!= GLSL_TYPE_STRUCT
552 && this->base_type
!= GLSL_TYPE_INTERFACE
)
555 for (unsigned i
= 0; i
< this->length
; i
++) {
556 if (strcmp(name
, this->fields
.structure
[i
].name
) == 0)
557 return this->fields
.structure
[i
].type
;
565 glsl_type::field_index(const char *name
) const
567 if (this->base_type
!= GLSL_TYPE_STRUCT
568 && this->base_type
!= GLSL_TYPE_INTERFACE
)
571 for (unsigned i
= 0; i
< this->length
; i
++) {
572 if (strcmp(name
, this->fields
.structure
[i
].name
) == 0)
581 glsl_type::component_slots() const
583 switch (this->base_type
) {
586 case GLSL_TYPE_FLOAT
:
588 return this->components();
590 case GLSL_TYPE_STRUCT
:
591 case GLSL_TYPE_INTERFACE
: {
594 for (unsigned i
= 0; i
< this->length
; i
++)
595 size
+= this->fields
.structure
[i
].type
->component_slots();
600 case GLSL_TYPE_ARRAY
:
601 return this->length
* this->fields
.array
->component_slots();
603 case GLSL_TYPE_SAMPLER
:
605 case GLSL_TYPE_ERROR
:
613 glsl_type::can_implicitly_convert_to(const glsl_type
*desired
) const
618 /* There is no conversion among matrix types. */
619 if (this->matrix_columns
> 1 || desired
->matrix_columns
> 1)
622 /* int and uint can be converted to float. */
623 return desired
->is_float()
624 && this->is_integer()
625 && this->vector_elements
== desired
->vector_elements
;
629 glsl_type::std140_base_alignment(bool row_major
) const
631 /* (1) If the member is a scalar consuming <N> basic machine units, the
632 * base alignment is <N>.
634 * (2) If the member is a two- or four-component vector with components
635 * consuming <N> basic machine units, the base alignment is 2<N> or
636 * 4<N>, respectively.
638 * (3) If the member is a three-component vector with components consuming
639 * <N> basic machine units, the base alignment is 4<N>.
641 if (this->is_scalar() || this->is_vector()) {
642 switch (this->vector_elements
) {
653 /* (4) If the member is an array of scalars or vectors, the base alignment
654 * and array stride are set to match the base alignment of a single
655 * array element, according to rules (1), (2), and (3), and rounded up
656 * to the base alignment of a vec4. The array may have padding at the
657 * end; the base offset of the member following the array is rounded up
658 * to the next multiple of the base alignment.
660 * (6) If the member is an array of <S> column-major matrices with <C>
661 * columns and <R> rows, the matrix is stored identically to a row of
662 * <S>*<C> column vectors with <R> components each, according to rule
665 * (8) If the member is an array of <S> row-major matrices with <C> columns
666 * and <R> rows, the matrix is stored identically to a row of <S>*<R>
667 * row vectors with <C> components each, according to rule (4).
669 * (10) If the member is an array of <S> structures, the <S> elements of
670 * the array are laid out in order, according to rule (9).
672 if (this->is_array()) {
673 if (this->fields
.array
->is_scalar() ||
674 this->fields
.array
->is_vector() ||
675 this->fields
.array
->is_matrix()) {
676 return MAX2(this->fields
.array
->std140_base_alignment(row_major
), 16);
678 assert(this->fields
.array
->is_record());
679 return this->fields
.array
->std140_base_alignment(row_major
);
683 /* (5) If the member is a column-major matrix with <C> columns and
684 * <R> rows, the matrix is stored identically to an array of
685 * <C> column vectors with <R> components each, according to
688 * (7) If the member is a row-major matrix with <C> columns and <R>
689 * rows, the matrix is stored identically to an array of <R>
690 * row vectors with <C> components each, according to rule (4).
692 if (this->is_matrix()) {
693 const struct glsl_type
*vec_type
, *array_type
;
694 int c
= this->matrix_columns
;
695 int r
= this->vector_elements
;
698 vec_type
= get_instance(GLSL_TYPE_FLOAT
, c
, 1);
699 array_type
= glsl_type::get_array_instance(vec_type
, r
);
701 vec_type
= get_instance(GLSL_TYPE_FLOAT
, r
, 1);
702 array_type
= glsl_type::get_array_instance(vec_type
, c
);
705 return array_type
->std140_base_alignment(false);
708 /* (9) If the member is a structure, the base alignment of the
709 * structure is <N>, where <N> is the largest base alignment
710 * value of any of its members, and rounded up to the base
711 * alignment of a vec4. The individual members of this
712 * sub-structure are then assigned offsets by applying this set
713 * of rules recursively, where the base offset of the first
714 * member of the sub-structure is equal to the aligned offset
715 * of the structure. The structure may have padding at the end;
716 * the base offset of the member following the sub-structure is
717 * rounded up to the next multiple of the base alignment of the
720 if (this->is_record()) {
721 unsigned base_alignment
= 16;
722 for (unsigned i
= 0; i
< this->length
; i
++) {
723 const struct glsl_type
*field_type
= this->fields
.structure
[i
].type
;
724 base_alignment
= MAX2(base_alignment
,
725 field_type
->std140_base_alignment(row_major
));
727 return base_alignment
;
730 assert(!"not reached");
735 glsl_type::std140_size(bool row_major
) const
737 /* (1) If the member is a scalar consuming <N> basic machine units, the
738 * base alignment is <N>.
740 * (2) If the member is a two- or four-component vector with components
741 * consuming <N> basic machine units, the base alignment is 2<N> or
742 * 4<N>, respectively.
744 * (3) If the member is a three-component vector with components consuming
745 * <N> basic machine units, the base alignment is 4<N>.
747 if (this->is_scalar() || this->is_vector()) {
748 return this->vector_elements
* 4;
751 /* (5) If the member is a column-major matrix with <C> columns and
752 * <R> rows, the matrix is stored identically to an array of
753 * <C> column vectors with <R> components each, according to
756 * (6) If the member is an array of <S> column-major matrices with <C>
757 * columns and <R> rows, the matrix is stored identically to a row of
758 * <S>*<C> column vectors with <R> components each, according to rule
761 * (7) If the member is a row-major matrix with <C> columns and <R>
762 * rows, the matrix is stored identically to an array of <R>
763 * row vectors with <C> components each, according to rule (4).
765 * (8) If the member is an array of <S> row-major matrices with <C> columns
766 * and <R> rows, the matrix is stored identically to a row of <S>*<R>
767 * row vectors with <C> components each, according to rule (4).
769 if (this->is_matrix() || (this->is_array() &&
770 this->fields
.array
->is_matrix())) {
771 const struct glsl_type
*element_type
;
772 const struct glsl_type
*vec_type
;
773 unsigned int array_len
;
775 if (this->is_array()) {
776 element_type
= this->fields
.array
;
777 array_len
= this->length
;
784 vec_type
= get_instance(GLSL_TYPE_FLOAT
,
785 element_type
->matrix_columns
, 1);
786 array_len
*= element_type
->vector_elements
;
788 vec_type
= get_instance(GLSL_TYPE_FLOAT
,
789 element_type
->vector_elements
, 1);
790 array_len
*= element_type
->matrix_columns
;
792 const glsl_type
*array_type
= glsl_type::get_array_instance(vec_type
,
795 return array_type
->std140_size(false);
798 /* (4) If the member is an array of scalars or vectors, the base alignment
799 * and array stride are set to match the base alignment of a single
800 * array element, according to rules (1), (2), and (3), and rounded up
801 * to the base alignment of a vec4. The array may have padding at the
802 * end; the base offset of the member following the array is rounded up
803 * to the next multiple of the base alignment.
805 * (10) If the member is an array of <S> structures, the <S> elements of
806 * the array are laid out in order, according to rule (9).
808 if (this->is_array()) {
809 if (this->fields
.array
->is_record()) {
810 return this->length
* this->fields
.array
->std140_size(row_major
);
812 unsigned element_base_align
=
813 this->fields
.array
->std140_base_alignment(row_major
);
814 return this->length
* MAX2(element_base_align
, 16);
818 /* (9) If the member is a structure, the base alignment of the
819 * structure is <N>, where <N> is the largest base alignment
820 * value of any of its members, and rounded up to the base
821 * alignment of a vec4. The individual members of this
822 * sub-structure are then assigned offsets by applying this set
823 * of rules recursively, where the base offset of the first
824 * member of the sub-structure is equal to the aligned offset
825 * of the structure. The structure may have padding at the end;
826 * the base offset of the member following the sub-structure is
827 * rounded up to the next multiple of the base alignment of the
830 if (this->is_record()) {
832 for (unsigned i
= 0; i
< this->length
; i
++) {
833 const struct glsl_type
*field_type
= this->fields
.structure
[i
].type
;
834 unsigned align
= field_type
->std140_base_alignment(row_major
);
835 size
= glsl_align(size
, align
);
836 size
+= field_type
->std140_size(row_major
);
838 size
= glsl_align(size
,
839 this->fields
.structure
[0].type
->std140_base_alignment(row_major
));
843 assert(!"not reached");
849 glsl_type::count_attribute_slots() const
851 /* From page 31 (page 37 of the PDF) of the GLSL 1.50 spec:
853 * "A scalar input counts the same amount against this limit as a vec4,
854 * so applications may want to consider packing groups of four
855 * unrelated float inputs together into a vector to better utilize the
856 * capabilities of the underlying hardware. A matrix input will use up
857 * multiple locations. The number of locations used will equal the
858 * number of columns in the matrix."
860 * The spec does not explicitly say how arrays are counted. However, it
861 * should be safe to assume the total number of slots consumed by an array
862 * is the number of entries in the array multiplied by the number of slots
863 * consumed by a single element of the array.
865 * The spec says nothing about how structs are counted, because vertex
866 * attributes are not allowed to be (or contain) structs. However, Mesa
867 * allows varying structs, the number of varying slots taken up by a
868 * varying struct is simply equal to the sum of the number of slots taken
869 * up by each element.
871 switch (this->base_type
) {
874 case GLSL_TYPE_FLOAT
:
876 return this->matrix_columns
;
878 case GLSL_TYPE_STRUCT
:
879 case GLSL_TYPE_INTERFACE
: {
882 for (unsigned i
= 0; i
< this->length
; i
++)
883 size
+= this->fields
.structure
[i
].type
->count_attribute_slots();
888 case GLSL_TYPE_ARRAY
:
889 return this->length
* this->fields
.array
->count_attribute_slots();
891 case GLSL_TYPE_SAMPLER
:
893 case GLSL_TYPE_ERROR
:
897 assert(!"Unexpected type in count_attribute_slots()");
903 glsl_type::sampler_coordinate_components() const
905 assert(is_sampler());
909 switch (sampler_dimensionality
) {
910 case GLSL_SAMPLER_DIM_1D
:
911 case GLSL_SAMPLER_DIM_BUF
:
914 case GLSL_SAMPLER_DIM_2D
:
915 case GLSL_SAMPLER_DIM_RECT
:
916 case GLSL_SAMPLER_DIM_MS
:
917 case GLSL_SAMPLER_DIM_EXTERNAL
:
920 case GLSL_SAMPLER_DIM_3D
:
921 case GLSL_SAMPLER_DIM_CUBE
:
925 assert(!"Should not get here.");
930 /* Array textures need an additional component for the array index. */