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
].row_major
= fields
[i
].row_major
;
108 glsl_type::glsl_type(const glsl_struct_field
*fields
, unsigned num_fields
,
109 enum glsl_interface_packing packing
, const char *name
) :
111 base_type(GLSL_TYPE_INTERFACE
),
112 sampler_dimensionality(0), sampler_shadow(0), sampler_array(0),
113 sampler_type(0), interface_packing((unsigned) packing
),
114 vector_elements(0), matrix_columns(0),
119 init_ralloc_type_ctx();
120 assert(name
!= NULL
);
121 this->name
= ralloc_strdup(this->mem_ctx
, name
);
122 this->fields
.structure
= ralloc_array(this->mem_ctx
,
123 glsl_struct_field
, length
);
124 for (i
= 0; i
< length
; i
++) {
125 this->fields
.structure
[i
].type
= fields
[i
].type
;
126 this->fields
.structure
[i
].name
= ralloc_strdup(this->fields
.structure
,
128 this->fields
.structure
[i
].location
= fields
[i
].location
;
129 this->fields
.structure
[i
].row_major
= fields
[i
].row_major
;
135 glsl_type::contains_sampler() const
137 if (this->is_array()) {
138 return this->fields
.array
->contains_sampler();
139 } else if (this->is_record()) {
140 for (unsigned int i
= 0; i
< this->length
; i
++) {
141 if (this->fields
.structure
[i
].type
->contains_sampler())
146 return this->is_sampler();
152 glsl_type::contains_integer() const
154 if (this->is_array()) {
155 return this->fields
.array
->contains_integer();
156 } else if (this->is_record()) {
157 for (unsigned int i
= 0; i
< this->length
; i
++) {
158 if (this->fields
.structure
[i
].type
->contains_integer())
163 return this->is_integer();
169 glsl_type::sampler_index() const
171 const glsl_type
*const t
= (this->is_array()) ? this->fields
.array
: this;
173 assert(t
->is_sampler());
175 switch (t
->sampler_dimensionality
) {
176 case GLSL_SAMPLER_DIM_1D
:
177 return (t
->sampler_array
) ? TEXTURE_1D_ARRAY_INDEX
: TEXTURE_1D_INDEX
;
178 case GLSL_SAMPLER_DIM_2D
:
179 return (t
->sampler_array
) ? TEXTURE_2D_ARRAY_INDEX
: TEXTURE_2D_INDEX
;
180 case GLSL_SAMPLER_DIM_3D
:
181 return TEXTURE_3D_INDEX
;
182 case GLSL_SAMPLER_DIM_CUBE
:
183 return (t
->sampler_array
) ? TEXTURE_CUBE_ARRAY_INDEX
: TEXTURE_CUBE_INDEX
;
184 case GLSL_SAMPLER_DIM_RECT
:
185 return TEXTURE_RECT_INDEX
;
186 case GLSL_SAMPLER_DIM_BUF
:
187 return TEXTURE_BUFFER_INDEX
;
188 case GLSL_SAMPLER_DIM_EXTERNAL
:
189 return TEXTURE_EXTERNAL_INDEX
;
190 case GLSL_SAMPLER_DIM_MS
:
191 return (t
->sampler_array
) ? TEXTURE_2D_MULTISAMPLE_ARRAY_INDEX
: TEXTURE_2D_MULTISAMPLE_INDEX
;
193 assert(!"Should not get here.");
194 return TEXTURE_BUFFER_INDEX
;
199 const glsl_type
*glsl_type::get_base_type() const
206 case GLSL_TYPE_FLOAT
:
216 const glsl_type
*glsl_type::get_scalar_type() const
218 const glsl_type
*type
= this;
221 while (type
->base_type
== GLSL_TYPE_ARRAY
)
222 type
= type
->fields
.array
;
224 /* Handle vectors and matrices */
225 switch (type
->base_type
) {
230 case GLSL_TYPE_FLOAT
:
235 /* Handle everything else */
242 _mesa_glsl_release_types(void)
244 if (glsl_type::array_types
!= NULL
) {
245 hash_table_dtor(glsl_type::array_types
);
246 glsl_type::array_types
= NULL
;
249 if (glsl_type::record_types
!= NULL
) {
250 hash_table_dtor(glsl_type::record_types
);
251 glsl_type::record_types
= NULL
;
256 glsl_type::glsl_type(const glsl_type
*array
, unsigned length
) :
257 base_type(GLSL_TYPE_ARRAY
),
258 sampler_dimensionality(0), sampler_shadow(0), sampler_array(0),
259 sampler_type(0), interface_packing(0),
260 vector_elements(0), matrix_columns(0),
261 name(NULL
), length(length
)
263 this->fields
.array
= array
;
264 /* Inherit the gl type of the base. The GL type is used for
265 * uniform/statevar handling in Mesa and the arrayness of the type
266 * is represented by the size rather than the type.
268 this->gl_type
= array
->gl_type
;
270 /* Allow a maximum of 10 characters for the array size. This is enough
271 * for 32-bits of ~0. The extra 3 are for the '[', ']', and terminating
274 const unsigned name_length
= strlen(array
->name
) + 10 + 3;
275 char *const n
= (char *) ralloc_size(this->mem_ctx
, name_length
);
278 snprintf(n
, name_length
, "%s[]", array
->name
);
280 snprintf(n
, name_length
, "%s[%u]", array
->name
, length
);
287 glsl_type::vec(unsigned components
)
289 if (components
== 0 || components
> 4)
292 static const glsl_type
*const ts
[] = {
293 float_type
, vec2_type
, vec3_type
, vec4_type
295 return ts
[components
- 1];
300 glsl_type::ivec(unsigned components
)
302 if (components
== 0 || components
> 4)
305 static const glsl_type
*const ts
[] = {
306 int_type
, ivec2_type
, ivec3_type
, ivec4_type
308 return ts
[components
- 1];
313 glsl_type::uvec(unsigned components
)
315 if (components
== 0 || components
> 4)
318 static const glsl_type
*const ts
[] = {
319 uint_type
, uvec2_type
, uvec3_type
, uvec4_type
321 return ts
[components
- 1];
326 glsl_type::bvec(unsigned components
)
328 if (components
== 0 || components
> 4)
331 static const glsl_type
*const ts
[] = {
332 bool_type
, bvec2_type
, bvec3_type
, bvec4_type
334 return ts
[components
- 1];
339 glsl_type::get_instance(unsigned base_type
, unsigned rows
, unsigned columns
)
341 if (base_type
== GLSL_TYPE_VOID
)
344 if ((rows
< 1) || (rows
> 4) || (columns
< 1) || (columns
> 4))
347 /* Treat GLSL vectors as Nx1 matrices.
355 case GLSL_TYPE_FLOAT
:
363 if ((base_type
!= GLSL_TYPE_FLOAT
) || (rows
== 1))
366 /* GLSL matrix types are named mat{COLUMNS}x{ROWS}. Only the following
367 * combinations are valid:
375 #define IDX(c,r) (((c-1)*3) + (r-1))
377 switch (IDX(columns
, rows
)) {
378 case IDX(2,2): return mat2_type
;
379 case IDX(2,3): return mat2x3_type
;
380 case IDX(2,4): return mat2x4_type
;
381 case IDX(3,2): return mat3x2_type
;
382 case IDX(3,3): return mat3_type
;
383 case IDX(3,4): return mat3x4_type
;
384 case IDX(4,2): return mat4x2_type
;
385 case IDX(4,3): return mat4x3_type
;
386 case IDX(4,4): return mat4_type
;
387 default: return error_type
;
391 assert(!"Should not get here.");
397 glsl_type::get_array_instance(const glsl_type
*base
, unsigned array_size
)
400 if (array_types
== NULL
) {
401 array_types
= hash_table_ctor(64, hash_table_string_hash
,
402 hash_table_string_compare
);
405 /* Generate a name using the base type pointer in the key. This is
406 * done because the name of the base type may not be unique across
407 * shaders. For example, two shaders may have different record types
411 snprintf(key
, sizeof(key
), "%p[%u]", (void *) base
, array_size
);
413 const glsl_type
*t
= (glsl_type
*) hash_table_find(array_types
, key
);
415 t
= new glsl_type(base
, array_size
);
417 hash_table_insert(array_types
, (void *) t
, ralloc_strdup(mem_ctx
, key
));
420 assert(t
->base_type
== GLSL_TYPE_ARRAY
);
421 assert(t
->length
== array_size
);
422 assert(t
->fields
.array
== base
);
429 glsl_type::record_key_compare(const void *a
, const void *b
)
431 const glsl_type
*const key1
= (glsl_type
*) a
;
432 const glsl_type
*const key2
= (glsl_type
*) b
;
434 /* Return zero is the types match (there is zero difference) or non-zero
437 if (strcmp(key1
->name
, key2
->name
) != 0)
440 if (key1
->length
!= key2
->length
)
443 if (key1
->interface_packing
!= key2
->interface_packing
)
446 for (unsigned i
= 0; i
< key1
->length
; i
++) {
447 if (key1
->fields
.structure
[i
].type
!= key2
->fields
.structure
[i
].type
)
449 if (strcmp(key1
->fields
.structure
[i
].name
,
450 key2
->fields
.structure
[i
].name
) != 0)
452 if (key1
->fields
.structure
[i
].row_major
453 != key2
->fields
.structure
[i
].row_major
)
462 glsl_type::record_key_hash(const void *a
)
464 const glsl_type
*const key
= (glsl_type
*) a
;
468 size
= snprintf(hash_key
, sizeof(hash_key
), "%08x", key
->length
);
470 for (unsigned i
= 0; i
< key
->length
; i
++) {
471 if (size
>= sizeof(hash_key
))
474 size
+= snprintf(& hash_key
[size
], sizeof(hash_key
) - size
,
475 "%p", (void *) key
->fields
.structure
[i
].type
);
478 return hash_table_string_hash(& hash_key
);
483 glsl_type::get_record_instance(const glsl_struct_field
*fields
,
487 const glsl_type
key(fields
, num_fields
, name
);
489 if (record_types
== NULL
) {
490 record_types
= hash_table_ctor(64, record_key_hash
, record_key_compare
);
493 const glsl_type
*t
= (glsl_type
*) hash_table_find(record_types
, & key
);
495 t
= new glsl_type(fields
, num_fields
, name
);
497 hash_table_insert(record_types
, (void *) t
, t
);
500 assert(t
->base_type
== GLSL_TYPE_STRUCT
);
501 assert(t
->length
== num_fields
);
502 assert(strcmp(t
->name
, name
) == 0);
509 glsl_type::get_interface_instance(const glsl_struct_field
*fields
,
511 enum glsl_interface_packing packing
,
514 const glsl_type
key(fields
, num_fields
, packing
, name
);
516 if (interface_types
== NULL
) {
517 interface_types
= hash_table_ctor(64, record_key_hash
, record_key_compare
);
520 const glsl_type
*t
= (glsl_type
*) hash_table_find(interface_types
, & key
);
522 t
= new glsl_type(fields
, num_fields
, packing
, name
);
524 hash_table_insert(interface_types
, (void *) t
, t
);
527 assert(t
->base_type
== GLSL_TYPE_INTERFACE
);
528 assert(t
->length
== num_fields
);
529 assert(strcmp(t
->name
, name
) == 0);
536 glsl_type::field_type(const char *name
) const
538 if (this->base_type
!= GLSL_TYPE_STRUCT
539 && this->base_type
!= GLSL_TYPE_INTERFACE
)
542 for (unsigned i
= 0; i
< this->length
; i
++) {
543 if (strcmp(name
, this->fields
.structure
[i
].name
) == 0)
544 return this->fields
.structure
[i
].type
;
552 glsl_type::field_index(const char *name
) const
554 if (this->base_type
!= GLSL_TYPE_STRUCT
555 && this->base_type
!= GLSL_TYPE_INTERFACE
)
558 for (unsigned i
= 0; i
< this->length
; i
++) {
559 if (strcmp(name
, this->fields
.structure
[i
].name
) == 0)
568 glsl_type::component_slots() const
570 switch (this->base_type
) {
573 case GLSL_TYPE_FLOAT
:
575 return this->components();
577 case GLSL_TYPE_STRUCT
:
578 case GLSL_TYPE_INTERFACE
: {
581 for (unsigned i
= 0; i
< this->length
; i
++)
582 size
+= this->fields
.structure
[i
].type
->component_slots();
587 case GLSL_TYPE_ARRAY
:
588 return this->length
* this->fields
.array
->component_slots();
590 case GLSL_TYPE_SAMPLER
:
592 case GLSL_TYPE_ERROR
:
600 glsl_type::can_implicitly_convert_to(const glsl_type
*desired
) const
605 /* There is no conversion among matrix types. */
606 if (this->matrix_columns
> 1 || desired
->matrix_columns
> 1)
609 /* int and uint can be converted to float. */
610 return desired
->is_float()
611 && this->is_integer()
612 && this->vector_elements
== desired
->vector_elements
;
616 glsl_type::std140_base_alignment(bool row_major
) const
618 /* (1) If the member is a scalar consuming <N> basic machine units, the
619 * base alignment is <N>.
621 * (2) If the member is a two- or four-component vector with components
622 * consuming <N> basic machine units, the base alignment is 2<N> or
623 * 4<N>, respectively.
625 * (3) If the member is a three-component vector with components consuming
626 * <N> basic machine units, the base alignment is 4<N>.
628 if (this->is_scalar() || this->is_vector()) {
629 switch (this->vector_elements
) {
640 /* (4) If the member is an array of scalars or vectors, the base alignment
641 * and array stride are set to match the base alignment of a single
642 * array element, according to rules (1), (2), and (3), and rounded up
643 * to the base alignment of a vec4. The array may have padding at the
644 * end; the base offset of the member following the array is rounded up
645 * to the next multiple of the base alignment.
647 * (6) If the member is an array of <S> column-major matrices with <C>
648 * columns and <R> rows, the matrix is stored identically to a row of
649 * <S>*<C> column vectors with <R> components each, according to rule
652 * (8) If the member is an array of <S> row-major matrices with <C> columns
653 * and <R> rows, the matrix is stored identically to a row of <S>*<R>
654 * row vectors with <C> components each, according to rule (4).
656 * (10) If the member is an array of <S> structures, the <S> elements of
657 * the array are laid out in order, according to rule (9).
659 if (this->is_array()) {
660 if (this->fields
.array
->is_scalar() ||
661 this->fields
.array
->is_vector() ||
662 this->fields
.array
->is_matrix()) {
663 return MAX2(this->fields
.array
->std140_base_alignment(row_major
), 16);
665 assert(this->fields
.array
->is_record());
666 return this->fields
.array
->std140_base_alignment(row_major
);
670 /* (5) If the member is a column-major matrix with <C> columns and
671 * <R> rows, the matrix is stored identically to an array of
672 * <C> column vectors with <R> components each, according to
675 * (7) If the member is a row-major matrix with <C> columns and <R>
676 * rows, the matrix is stored identically to an array of <R>
677 * row vectors with <C> components each, according to rule (4).
679 if (this->is_matrix()) {
680 const struct glsl_type
*vec_type
, *array_type
;
681 int c
= this->matrix_columns
;
682 int r
= this->vector_elements
;
685 vec_type
= get_instance(GLSL_TYPE_FLOAT
, c
, 1);
686 array_type
= glsl_type::get_array_instance(vec_type
, r
);
688 vec_type
= get_instance(GLSL_TYPE_FLOAT
, r
, 1);
689 array_type
= glsl_type::get_array_instance(vec_type
, c
);
692 return array_type
->std140_base_alignment(false);
695 /* (9) If the member is a structure, the base alignment of the
696 * structure is <N>, where <N> is the largest base alignment
697 * value of any of its members, and rounded up to the base
698 * alignment of a vec4. The individual members of this
699 * sub-structure are then assigned offsets by applying this set
700 * of rules recursively, where the base offset of the first
701 * member of the sub-structure is equal to the aligned offset
702 * of the structure. The structure may have padding at the end;
703 * the base offset of the member following the sub-structure is
704 * rounded up to the next multiple of the base alignment of the
707 if (this->is_record()) {
708 unsigned base_alignment
= 16;
709 for (unsigned i
= 0; i
< this->length
; i
++) {
710 const struct glsl_type
*field_type
= this->fields
.structure
[i
].type
;
711 base_alignment
= MAX2(base_alignment
,
712 field_type
->std140_base_alignment(row_major
));
714 return base_alignment
;
717 assert(!"not reached");
722 glsl_type::std140_size(bool row_major
) const
724 /* (1) If the member is a scalar consuming <N> basic machine units, the
725 * base alignment is <N>.
727 * (2) If the member is a two- or four-component vector with components
728 * consuming <N> basic machine units, the base alignment is 2<N> or
729 * 4<N>, respectively.
731 * (3) If the member is a three-component vector with components consuming
732 * <N> basic machine units, the base alignment is 4<N>.
734 if (this->is_scalar() || this->is_vector()) {
735 return this->vector_elements
* 4;
738 /* (5) If the member is a column-major matrix with <C> columns and
739 * <R> rows, the matrix is stored identically to an array of
740 * <C> column vectors with <R> components each, according to
743 * (6) If the member is an array of <S> column-major matrices with <C>
744 * columns and <R> rows, the matrix is stored identically to a row of
745 * <S>*<C> column vectors with <R> components each, according to rule
748 * (7) If the member is a row-major matrix with <C> columns and <R>
749 * rows, the matrix is stored identically to an array of <R>
750 * row vectors with <C> components each, according to rule (4).
752 * (8) If the member is an array of <S> row-major matrices with <C> columns
753 * and <R> rows, the matrix is stored identically to a row of <S>*<R>
754 * row vectors with <C> components each, according to rule (4).
756 if (this->is_matrix() || (this->is_array() &&
757 this->fields
.array
->is_matrix())) {
758 const struct glsl_type
*element_type
;
759 const struct glsl_type
*vec_type
;
760 unsigned int array_len
;
762 if (this->is_array()) {
763 element_type
= this->fields
.array
;
764 array_len
= this->length
;
771 vec_type
= get_instance(GLSL_TYPE_FLOAT
,
772 element_type
->matrix_columns
, 1);
773 array_len
*= element_type
->vector_elements
;
775 vec_type
= get_instance(GLSL_TYPE_FLOAT
,
776 element_type
->vector_elements
, 1);
777 array_len
*= element_type
->matrix_columns
;
779 const glsl_type
*array_type
= glsl_type::get_array_instance(vec_type
,
782 return array_type
->std140_size(false);
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 * (10) If the member is an array of <S> structures, the <S> elements of
793 * the array are laid out in order, according to rule (9).
795 if (this->is_array()) {
796 if (this->fields
.array
->is_record()) {
797 return this->length
* this->fields
.array
->std140_size(row_major
);
799 unsigned element_base_align
=
800 this->fields
.array
->std140_base_alignment(row_major
);
801 return this->length
* MAX2(element_base_align
, 16);
805 /* (9) If the member is a structure, the base alignment of the
806 * structure is <N>, where <N> is the largest base alignment
807 * value of any of its members, and rounded up to the base
808 * alignment of a vec4. The individual members of this
809 * sub-structure are then assigned offsets by applying this set
810 * of rules recursively, where the base offset of the first
811 * member of the sub-structure is equal to the aligned offset
812 * of the structure. The structure may have padding at the end;
813 * the base offset of the member following the sub-structure is
814 * rounded up to the next multiple of the base alignment of the
817 if (this->is_record()) {
819 for (unsigned i
= 0; i
< this->length
; i
++) {
820 const struct glsl_type
*field_type
= this->fields
.structure
[i
].type
;
821 unsigned align
= field_type
->std140_base_alignment(row_major
);
822 size
= glsl_align(size
, align
);
823 size
+= field_type
->std140_size(row_major
);
825 size
= glsl_align(size
,
826 this->fields
.structure
[0].type
->std140_base_alignment(row_major
));
830 assert(!"not reached");
836 glsl_type::count_attribute_slots() const
838 /* From page 31 (page 37 of the PDF) of the GLSL 1.50 spec:
840 * "A scalar input counts the same amount against this limit as a vec4,
841 * so applications may want to consider packing groups of four
842 * unrelated float inputs together into a vector to better utilize the
843 * capabilities of the underlying hardware. A matrix input will use up
844 * multiple locations. The number of locations used will equal the
845 * number of columns in the matrix."
847 * The spec does not explicitly say how arrays are counted. However, it
848 * should be safe to assume the total number of slots consumed by an array
849 * is the number of entries in the array multiplied by the number of slots
850 * consumed by a single element of the array.
852 * The spec says nothing about how structs are counted, because vertex
853 * attributes are not allowed to be (or contain) structs. However, Mesa
854 * allows varying structs, the number of varying slots taken up by a
855 * varying struct is simply equal to the sum of the number of slots taken
856 * up by each element.
858 switch (this->base_type
) {
861 case GLSL_TYPE_FLOAT
:
863 return this->matrix_columns
;
865 case GLSL_TYPE_STRUCT
:
866 case GLSL_TYPE_INTERFACE
: {
869 for (unsigned i
= 0; i
< this->length
; i
++)
870 size
+= this->fields
.structure
[i
].type
->count_attribute_slots();
875 case GLSL_TYPE_ARRAY
:
876 return this->length
* this->fields
.array
->count_attribute_slots();
878 case GLSL_TYPE_SAMPLER
:
880 case GLSL_TYPE_ERROR
:
884 assert(!"Unexpected type in count_attribute_slots()");
890 glsl_type::sampler_coordinate_components() const
892 assert(is_sampler());
896 switch (sampler_dimensionality
) {
897 case GLSL_SAMPLER_DIM_1D
:
898 case GLSL_SAMPLER_DIM_BUF
:
901 case GLSL_SAMPLER_DIM_2D
:
902 case GLSL_SAMPLER_DIM_RECT
:
903 case GLSL_SAMPLER_DIM_MS
:
904 case GLSL_SAMPLER_DIM_EXTERNAL
:
907 case GLSL_SAMPLER_DIM_3D
:
908 case GLSL_SAMPLER_DIM_CUBE
:
912 assert(!"Should not get here.");
917 /* Array textures need an additional component for the array index. */