1 /* 2 * Copyright 2009 Intel Corporation 3 * 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: 10 * 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 13 * Software. 14 * 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. 22 */ 23 24 #include <stdio.h> 25 #include <stdlib.h> 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" 31 extern "C" { 32 #include "program/hash_table.h" 33 } 34 35 hash_table *glsl_type::array_types = NULL; 36 hash_table *glsl_type::record_types = NULL; 37 void *glsl_type::mem_ctx = NULL; 38 39 void 40 glsl_type::init_ralloc_type_ctx(void) 41 { 42 if (glsl_type::mem_ctx == NULL) { 43 glsl_type::mem_ctx = ralloc_autofree_context(); 44 assert(glsl_type::mem_ctx != NULL); 45 } 46 } 47 48 glsl_type::glsl_type(GLenum gl_type, 49 glsl_base_type base_type, unsigned vector_elements, 50 unsigned matrix_columns, const char *name) : 51 gl_type(gl_type), 52 base_type(base_type), 53 sampler_dimensionality(0), sampler_shadow(0), sampler_array(0), 54 sampler_type(0), 55 vector_elements(vector_elements), matrix_columns(matrix_columns), 56 length(0) 57 { 58 init_ralloc_type_ctx(); 59 this->name = ralloc_strdup(this->mem_ctx, name); 60 /* Neither dimension is zero or both dimensions are zero. 61 */ 62 assert((vector_elements == 0) == (matrix_columns == 0)); 63 memset(& fields, 0, sizeof(fields)); 64 } 65 66 glsl_type::glsl_type(GLenum gl_type, 67 enum glsl_sampler_dim dim, bool shadow, bool array, 68 unsigned type, const char *name) : 69 gl_type(gl_type), 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), 74 length(0) 75 { 76 init_ralloc_type_ctx(); 77 this->name = ralloc_strdup(this->mem_ctx, name); 78 memset(& fields, 0, sizeof(fields)); 79 } 80 81 glsl_type::glsl_type(const glsl_struct_field *fields, unsigned num_fields, 82 const char *name) : 83 base_type(GLSL_TYPE_STRUCT), 84 sampler_dimensionality(0), sampler_shadow(0), sampler_array(0), 85 sampler_type(0), 86 vector_elements(0), matrix_columns(0), 87 length(num_fields) 88 { 89 unsigned int i; 90 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, 98 fields[i].name); 99 } 100 } 101 102 static void 103 add_types_to_symbol_table(glsl_symbol_table *symtab, 104 const struct glsl_type *types, 105 unsigned num_types, bool warn) 106 { 107 (void) warn; 108 109 for (unsigned i = 0; i < num_types; i++) { 110 symtab->add_type(types[i].name, & types[i]); 111 } 112 } 113 114 bool 115 glsl_type::contains_sampler() const 116 { 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()) 122 return true; 123 } 124 return false; 125 } else { 126 return this->is_sampler(); 127 } 128 } 129 130 gl_texture_index 131 glsl_type::sampler_index() const 132 { 133 const glsl_type *const t = (this->is_array()) ? this->fields.array : this; 134 135 assert(t->is_sampler()); 136 137 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 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; 152 default: 153 assert(!"Should not get here."); 154 return TEXTURE_BUFFER_INDEX; 155 } 156 } 157 158 void 159 glsl_type::generate_100ES_types(glsl_symbol_table *symtab) 160 { 161 add_types_to_symbol_table(symtab, builtin_core_types, 162 Elements(builtin_core_types), 163 false); 164 add_types_to_symbol_table(symtab, builtin_structure_types, 165 Elements(builtin_structure_types), 166 false); 167 add_types_to_symbol_table(symtab, void_type, 1, false); 168 } 169 170 void 171 glsl_type::generate_110_types(glsl_symbol_table *symtab, bool add_deprecated) 172 { 173 generate_100ES_types(symtab); 174 175 add_types_to_symbol_table(symtab, builtin_110_types, 176 Elements(builtin_110_types), 177 false); 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), 182 false); 183 } 184 } 185 186 187 void 188 glsl_type::generate_120_types(glsl_symbol_table *symtab, bool add_deprecated) 189 { 190 generate_110_types(symtab, add_deprecated); 191 192 add_types_to_symbol_table(symtab, builtin_120_types, 193 Elements(builtin_120_types), false); 194 } 195 196 197 void 198 glsl_type::generate_130_types(glsl_symbol_table *symtab, bool add_deprecated) 199 { 200 generate_120_types(symtab, add_deprecated); 201 202 add_types_to_symbol_table(symtab, builtin_130_types, 203 Elements(builtin_130_types), false); 204 generate_EXT_texture_array_types(symtab, false); 205 } 206 207 208 void 209 glsl_type::generate_140_types(glsl_symbol_table *symtab) 210 { 211 generate_130_types(symtab, false); 212 213 add_types_to_symbol_table(symtab, builtin_140_types, 214 Elements(builtin_140_types), false); 215 216 add_types_to_symbol_table(symtab, builtin_EXT_texture_buffer_object_types, 217 Elements(builtin_EXT_texture_buffer_object_types), 218 false); 219 } 220 221 222 void 223 glsl_type::generate_ARB_texture_rectangle_types(glsl_symbol_table *symtab, 224 bool warn) 225 { 226 add_types_to_symbol_table(symtab, builtin_ARB_texture_rectangle_types, 227 Elements(builtin_ARB_texture_rectangle_types), 228 warn); 229 } 230 231 232 void 233 glsl_type::generate_EXT_texture_array_types(glsl_symbol_table *symtab, 234 bool warn) 235 { 236 add_types_to_symbol_table(symtab, builtin_EXT_texture_array_types, 237 Elements(builtin_EXT_texture_array_types), 238 warn); 239 } 240 241 242 void 243 glsl_type::generate_OES_texture_3D_types(glsl_symbol_table *symtab, bool warn) 244 { 245 add_types_to_symbol_table(symtab, &_sampler3D_type, 1, warn); 246 } 247 248 249 void 250 glsl_type::generate_OES_EGL_image_external_types(glsl_symbol_table *symtab, 251 bool warn) 252 { 253 add_types_to_symbol_table(symtab, builtin_OES_EGL_image_external_types, 254 Elements(builtin_OES_EGL_image_external_types), 255 warn); 256 } 257 258 void 259 _mesa_glsl_initialize_types(struct _mesa_glsl_parse_state *state) 260 { 261 switch (state->language_version) { 262 case 100: 263 assert(state->es_shader); 264 glsl_type::generate_100ES_types(state->symbols); 265 break; 266 case 110: 267 glsl_type::generate_110_types(state->symbols, true); 268 break; 269 case 120: 270 glsl_type::generate_120_types(state->symbols, true); 271 break; 272 case 130: 273 glsl_type::generate_130_types(state->symbols, true); 274 break; 275 case 140: 276 glsl_type::generate_140_types(state->symbols); 277 break; 278 default: 279 /* error */ 280 break; 281 } 282 283 if (state->ARB_texture_rectangle_enable || 284 state->language_version >= 140) { 285 glsl_type::generate_ARB_texture_rectangle_types(state->symbols, 286 state->ARB_texture_rectangle_warn); 287 } 288 if (state->OES_texture_3D_enable && state->language_version == 100) { 289 glsl_type::generate_OES_texture_3D_types(state->symbols, 290 state->OES_texture_3D_warn); 291 } 292 293 if (state->EXT_texture_array_enable && state->language_version < 130) { 294 // These are already included in 130; don't create twice. 295 glsl_type::generate_EXT_texture_array_types(state->symbols, 296 state->EXT_texture_array_warn); 297 } 298 299 /* We cannot check for language_version == 100 here because we need the 300 * types to support fixed-function program generation. But this is fine 301 * since the extension is never enabled for OpenGL contexts. 302 */ 303 if (state->OES_EGL_image_external_enable) { 304 glsl_type::generate_OES_EGL_image_external_types(state->symbols, 305 state->OES_EGL_image_external_warn); 306 } 307 } 308 309 310 const glsl_type *glsl_type::get_base_type() const 311 { 312 switch (base_type) { 313 case GLSL_TYPE_UINT: 314 return uint_type; 315 case GLSL_TYPE_INT: 316 return int_type; 317 case GLSL_TYPE_FLOAT: 318 return float_type; 319 case GLSL_TYPE_BOOL: 320 return bool_type; 321 default: 322 return error_type; 323 } 324 } 325 326 327 const glsl_type *glsl_type::get_scalar_type() const 328 { 329 const glsl_type *type = this; 330 331 /* Handle arrays */ 332 while (type->base_type == GLSL_TYPE_ARRAY) 333 type = type->fields.array; 334 335 /* Handle vectors and matrices */ 336 switch (type->base_type) { 337 case GLSL_TYPE_UINT: 338 return uint_type; 339 case GLSL_TYPE_INT: 340 return int_type; 341 case GLSL_TYPE_FLOAT: 342 return float_type; 343 default: 344 /* Handle everything else */ 345 return type; 346 } 347 } 348 349 350 void 351 _mesa_glsl_release_types(void) 352 { 353 if (glsl_type::array_types != NULL) { 354 hash_table_dtor(glsl_type::array_types); 355 glsl_type::array_types = NULL; 356 } 357 358 if (glsl_type::record_types != NULL) { 359 hash_table_dtor(glsl_type::record_types); 360 glsl_type::record_types = NULL; 361 } 362 } 363 364 365 glsl_type::glsl_type(const glsl_type *array, unsigned length) : 366 base_type(GLSL_TYPE_ARRAY), 367 sampler_dimensionality(0), sampler_shadow(0), sampler_array(0), 368 sampler_type(0), 369 vector_elements(0), matrix_columns(0), 370 name(NULL), length(length) 371 { 372 this->fields.array = array; 373 /* Inherit the gl type of the base. The GL type is used for 374 * uniform/statevar handling in Mesa and the arrayness of the type 375 * is represented by the size rather than the type. 376 */ 377 this->gl_type = array->gl_type; 378 379 /* Allow a maximum of 10 characters for the array size. This is enough 380 * for 32-bits of ~0. The extra 3 are for the '[', ']', and terminating 381 * NUL. 382 */ 383 const unsigned name_length = strlen(array->name) + 10 + 3; 384 char *const n = (char *) ralloc_size(this->mem_ctx, name_length); 385 386 if (length == 0) 387 snprintf(n, name_length, "%s[]", array->name); 388 else 389 snprintf(n, name_length, "%s[%u]", array->name, length); 390 391 this->name = n; 392 } 393 394 395 const glsl_type * 396 glsl_type::get_instance(unsigned base_type, unsigned rows, unsigned columns) 397 { 398 if (base_type == GLSL_TYPE_VOID) 399 return void_type; 400 401 if ((rows < 1) || (rows > 4) || (columns < 1) || (columns > 4)) 402 return error_type; 403 404 /* Treat GLSL vectors as Nx1 matrices. 405 */ 406 if (columns == 1) { 407 switch (base_type) { 408 case GLSL_TYPE_UINT: 409 return uint_type + (rows - 1); 410 case GLSL_TYPE_INT: 411 return int_type + (rows - 1); 412 case GLSL_TYPE_FLOAT: 413 return float_type + (rows - 1); 414 case GLSL_TYPE_BOOL: 415 return bool_type + (rows - 1); 416 default: 417 return error_type; 418 } 419 } else { 420 if ((base_type != GLSL_TYPE_FLOAT) || (rows == 1)) 421 return error_type; 422 423 /* GLSL matrix types are named mat{COLUMNS}x{ROWS}. Only the following 424 * combinations are valid: 425 * 426 * 1 2 3 4 427 * 1 428 * 2 x x x 429 * 3 x x x 430 * 4 x x x 431 */ 432 #define IDX(c,r) (((c-1)*3) + (r-1)) 433 434 switch (IDX(columns, rows)) { 435 case IDX(2,2): return mat2_type; 436 case IDX(2,3): return mat2x3_type; 437 case IDX(2,4): return mat2x4_type; 438 case IDX(3,2): return mat3x2_type; 439 case IDX(3,3): return mat3_type; 440 case IDX(3,4): return mat3x4_type; 441 case IDX(4,2): return mat4x2_type; 442 case IDX(4,3): return mat4x3_type; 443 case IDX(4,4): return mat4_type; 444 default: return error_type; 445 } 446 } 447 448 assert(!"Should not get here."); 449 return error_type; 450 } 451 452 453 const glsl_type * 454 glsl_type::get_array_instance(const glsl_type *base, unsigned array_size) 455 { 456 457 if (array_types == NULL) { 458 array_types = hash_table_ctor(64, hash_table_string_hash, 459 hash_table_string_compare); 460 } 461 462 /* Generate a name using the base type pointer in the key. This is 463 * done because the name of the base type may not be unique across 464 * shaders. For example, two shaders may have different record types 465 * named 'foo'. 466 */ 467 char key[128]; 468 snprintf(key, sizeof(key), "%p[%u]", (void *) base, array_size); 469 470 const glsl_type *t = (glsl_type *) hash_table_find(array_types, key); 471 if (t == NULL) { 472 t = new glsl_type(base, array_size); 473 474 hash_table_insert(array_types, (void *) t, ralloc_strdup(mem_ctx, key)); 475 } 476 477 assert(t->base_type == GLSL_TYPE_ARRAY); 478 assert(t->length == array_size); 479 assert(t->fields.array == base); 480 481 return t; 482 } 483 484 485 int 486 glsl_type::record_key_compare(const void *a, const void *b) 487 { 488 const glsl_type *const key1 = (glsl_type *) a; 489 const glsl_type *const key2 = (glsl_type *) b; 490 491 /* Return zero is the types match (there is zero difference) or non-zero 492 * otherwise. 493 */ 494 if (strcmp(key1->name, key2->name) != 0) 495 return 1; 496 497 if (key1->length != key2->length) 498 return 1; 499 500 for (unsigned i = 0; i < key1->length; i++) { 501 if (key1->fields.structure[i].type != key2->fields.structure[i].type) 502 return 1; 503 if (strcmp(key1->fields.structure[i].name, 504 key2->fields.structure[i].name) != 0) 505 return 1; 506 } 507 508 return 0; 509 } 510 511 512 unsigned 513 glsl_type::record_key_hash(const void *a) 514 { 515 const glsl_type *const key = (glsl_type *) a; 516 char hash_key[128]; 517 unsigned size = 0; 518 519 size = snprintf(hash_key, sizeof(hash_key), "%08x", key->length); 520 521 for (unsigned i = 0; i < key->length; i++) { 522 if (size >= sizeof(hash_key)) 523 break; 524 525 size += snprintf(& hash_key[size], sizeof(hash_key) - size, 526 "%p", (void *) key->fields.structure[i].type); 527 } 528 529 return hash_table_string_hash(& hash_key); 530 } 531 532 533 const glsl_type * 534 glsl_type::get_record_instance(const glsl_struct_field *fields, 535 unsigned num_fields, 536 const char *name) 537 { 538 const glsl_type key(fields, num_fields, name); 539 540 if (record_types == NULL) { 541 record_types = hash_table_ctor(64, record_key_hash, record_key_compare); 542 } 543 544 const glsl_type *t = (glsl_type *) hash_table_find(record_types, & key); 545 if (t == NULL) { 546 t = new glsl_type(fields, num_fields, name); 547 548 hash_table_insert(record_types, (void *) t, t); 549 } 550 551 assert(t->base_type == GLSL_TYPE_STRUCT); 552 assert(t->length == num_fields); 553 assert(strcmp(t->name, name) == 0); 554 555 return t; 556 } 557 558 559 const glsl_type * 560 glsl_type::field_type(const char *name) const 561 { 562 if (this->base_type != GLSL_TYPE_STRUCT) 563 return error_type; 564 565 for (unsigned i = 0; i < this->length; i++) { 566 if (strcmp(name, this->fields.structure[i].name) == 0) 567 return this->fields.structure[i].type; 568 } 569 570 return error_type; 571 } 572 573 574 int 575 glsl_type::field_index(const char *name) const 576 { 577 if (this->base_type != GLSL_TYPE_STRUCT) 578 return -1; 579 580 for (unsigned i = 0; i < this->length; i++) { 581 if (strcmp(name, this->fields.structure[i].name) == 0) 582 return i; 583 } 584 585 return -1; 586 } 587 588 589 unsigned 590 glsl_type::component_slots() const 591 { 592 switch (this->base_type) { 593 case GLSL_TYPE_UINT: 594 case GLSL_TYPE_INT: 595 case GLSL_TYPE_FLOAT: 596 case GLSL_TYPE_BOOL: 597 return this->components(); 598 599 case GLSL_TYPE_STRUCT: { 600 unsigned size = 0; 601 602 for (unsigned i = 0; i < this->length; i++) 603 size += this->fields.structure[i].type->component_slots(); 604 605 return size; 606 } 607 608 case GLSL_TYPE_ARRAY: 609 return this->length * this->fields.array->component_slots(); 610 611 default: 612 return 0; 613 } 614 } 615 616 bool 617 glsl_type::can_implicitly_convert_to(const glsl_type *desired) const 618 { 619 if (this == desired) 620 return true; 621 622 /* There is no conversion among matrix types. */ 623 if (this->matrix_columns > 1 || desired->matrix_columns > 1) 624 return false; 625 626 /* int and uint can be converted to float. */ 627 return desired->is_float() 628 && this->is_integer() 629 && this->vector_elements == desired->vector_elements; 630 } 631 632 unsigned 633 glsl_type::std140_base_alignment(bool row_major) const 634 { 635 /* (1) If the member is a scalar consuming <N> basic machine units, the 636 * base alignment is <N>. 637 * 638 * (2) If the member is a two- or four-component vector with components 639 * consuming <N> basic machine units, the base alignment is 2<N> or 640 * 4<N>, respectively. 641 * 642 * (3) If the member is a three-component vector with components consuming 643 * <N> basic machine units, the base alignment is 4<N>. 644 */ 645 if (this->is_scalar() || this->is_vector()) { 646 switch (this->vector_elements) { 647 case 1: 648 return 4; 649 case 2: 650 return 8; 651 case 3: 652 case 4: 653 return 16; 654 } 655 } 656 657 /* (4) If the member is an array of scalars or vectors, the base alignment 658 * and array stride are set to match the base alignment of a single 659 * array element, according to rules (1), (2), and (3), and rounded up 660 * to the base alignment of a vec4. The array may have padding at the 661 * end; the base offset of the member following the array is rounded up 662 * to the next multiple of the base alignment. 663 * 664 * (6) If the member is an array of <S> column-major matrices with <C> 665 * columns and <R> rows, the matrix is stored identically to a row of 666 * <S>*<C> column vectors with <R> components each, according to rule 667 * (4). 668 * 669 * (8) If the member is an array of <S> row-major matrices with <C> columns 670 * and <R> rows, the matrix is stored identically to a row of <S>*<R> 671 * row vectors with <C> components each, according to rule (4). 672 * 673 * (10) If the member is an array of <S> structures, the <S> elements of 674 * the array are laid out in order, according to rule (9). 675 */ 676 if (this->is_array()) { 677 if (this->fields.array->is_scalar() || 678 this->fields.array->is_vector() || 679 this->fields.array->is_matrix()) { 680 return MAX2(this->fields.array->std140_base_alignment(row_major), 16); 681 } else { 682 assert(this->fields.array->is_record()); 683 return this->fields.array->std140_base_alignment(row_major); 684 } 685 } 686 687 /* (5) If the member is a column-major matrix with <C> columns and 688 * <R> rows, the matrix is stored identically to an array of 689 * <C> column vectors with <R> components each, according to 690 * rule (4). 691 * 692 * (7) If the member is a row-major matrix with <C> columns and <R> 693 * rows, the matrix is stored identically to an array of <R> 694 * row vectors with <C> components each, according to rule (4). 695 */ 696 if (this->is_matrix()) { 697 const struct glsl_type *vec_type, *array_type; 698 int c = this->matrix_columns; 699 int r = this->vector_elements; 700 701 if (row_major) { 702 vec_type = get_instance(GLSL_TYPE_FLOAT, c, 1); 703 array_type = glsl_type::get_array_instance(vec_type, r); 704 } else { 705 vec_type = get_instance(GLSL_TYPE_FLOAT, r, 1); 706 array_type = glsl_type::get_array_instance(vec_type, c); 707 } 708 709 return array_type->std140_base_alignment(false); 710 } 711 712 /* (9) If the member is a structure, the base alignment of the 713 * structure is <N>, where <N> is the largest base alignment 714 * value of any of its members, and rounded up to the base 715 * alignment of a vec4. The individual members of this 716 * sub-structure are then assigned offsets by applying this set 717 * of rules recursively, where the base offset of the first 718 * member of the sub-structure is equal to the aligned offset 719 * of the structure. The structure may have padding at the end; 720 * the base offset of the member following the sub-structure is 721 * rounded up to the next multiple of the base alignment of the 722 * structure. 723 */ 724 if (this->is_record()) { 725 unsigned base_alignment = 16; 726 for (unsigned i = 0; i < this->length; i++) { 727 const struct glsl_type *field_type = this->fields.structure[i].type; 728 base_alignment = MAX2(base_alignment, 729 field_type->std140_base_alignment(row_major)); 730 } 731 return base_alignment; 732 } 733 734 assert(!"not reached"); 735 return -1; 736 } 737 738 static unsigned 739 align(unsigned val, unsigned align) 740 { 741 return (val + align - 1) / align * align; 742 } 743 744 unsigned 745 glsl_type::std140_size(bool row_major) const 746 { 747 /* (1) If the member is a scalar consuming <N> basic machine units, the 748 * base alignment is <N>. 749 * 750 * (2) If the member is a two- or four-component vector with components 751 * consuming <N> basic machine units, the base alignment is 2<N> or 752 * 4<N>, respectively. 753 * 754 * (3) If the member is a three-component vector with components consuming 755 * <N> basic machine units, the base alignment is 4<N>. 756 */ 757 if (this->is_scalar() || this->is_vector()) { 758 return this->vector_elements * 4; 759 } 760 761 /* (5) If the member is a column-major matrix with <C> columns and 762 * <R> rows, the matrix is stored identically to an array of 763 * <C> column vectors with <R> components each, according to 764 * rule (4). 765 * 766 * (6) If the member is an array of <S> column-major matrices with <C> 767 * columns and <R> rows, the matrix is stored identically to a row of 768 * <S>*<C> column vectors with <R> components each, according to rule 769 * (4). 770 * 771 * (7) If the member is a row-major matrix with <C> columns and <R> 772 * rows, the matrix is stored identically to an array of <R> 773 * row vectors with <C> components each, according to rule (4). 774 * 775 * (8) If the member is an array of <S> row-major matrices with <C> columns 776 * and <R> rows, the matrix is stored identically to a row of <S>*<R> 777 * row vectors with <C> components each, according to rule (4). 778 */ 779 if (this->is_matrix() || (this->is_array() && 780 this->fields.array->is_matrix())) { 781 const struct glsl_type *element_type; 782 const struct glsl_type *vec_type; 783 unsigned int array_len; 784 785 if (this->is_array()) { 786 element_type = this->fields.array; 787 array_len = this->length; 788 } else { 789 element_type = this; 790 array_len = 1; 791 } 792 793 if (row_major) { 794 vec_type = get_instance(GLSL_TYPE_FLOAT, 795 element_type->matrix_columns, 1); 796 array_len *= element_type->vector_elements; 797 } else { 798 vec_type = get_instance(GLSL_TYPE_FLOAT, 799 element_type->vector_elements, 1); 800 array_len *= element_type->matrix_columns; 801 } 802 const glsl_type *array_type = glsl_type::get_array_instance(vec_type, 803 array_len); 804 805 return array_type->std140_size(false); 806 } 807 808 /* (4) If the member is an array of scalars or vectors, the base alignment 809 * and array stride are set to match the base alignment of a single 810 * array element, according to rules (1), (2), and (3), and rounded up 811 * to the base alignment of a vec4. The array may have padding at the 812 * end; the base offset of the member following the array is rounded up 813 * to the next multiple of the base alignment. 814 * 815 * (10) If the member is an array of <S> structures, the <S> elements of 816 * the array are laid out in order, according to rule (9). 817 */ 818 if (this->is_array()) { 819 if (this->fields.array->is_record()) { 820 return this->length * this->fields.array->std140_size(row_major); 821 } else { 822 unsigned element_base_align = 823 this->fields.array->std140_base_alignment(row_major); 824 return this->length * MAX2(element_base_align, 16); 825 } 826 } 827 828 /* (9) If the member is a structure, the base alignment of the 829 * structure is <N>, where <N> is the largest base alignment 830 * value of any of its members, and rounded up to the base 831 * alignment of a vec4. The individual members of this 832 * sub-structure are then assigned offsets by applying this set 833 * of rules recursively, where the base offset of the first 834 * member of the sub-structure is equal to the aligned offset 835 * of the structure. The structure may have padding at the end; 836 * the base offset of the member following the sub-structure is 837 * rounded up to the next multiple of the base alignment of the 838 * structure. 839 */ 840 if (this->is_record()) { 841 unsigned size = 0; 842 for (unsigned i = 0; i < this->length; i++) { 843 const struct glsl_type *field_type = this->fields.structure[i].type; 844 unsigned align = field_type->std140_base_alignment(row_major); 845 size = (size + align - 1) / align * align; 846 size += field_type->std140_size(row_major); 847 } 848 size = align(size, 849 this->fields.structure[0].type->std140_base_alignment(row_major)); 850 return size; 851 } 852 853 assert(!"not reached"); 854 return -1; 855 } 856
