| /* |
| * Copyright © 2009 Intel Corporation |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a |
| * copy of this software and associated documentation files (the "Software"), |
| * to deal in the Software without restriction, including without limitation |
| * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| * and/or sell copies of the Software, and to permit persons to whom the |
| * Software is furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice (including the next |
| * paragraph) shall be included in all copies or substantial portions of the |
| * Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
| * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
| * DEALINGS IN THE SOFTWARE. |
| */ |
| |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include "main/core.h" /* for Elements */ |
| #include "glsl_symbol_table.h" |
| #include "glsl_parser_extras.h" |
| #include "glsl_types.h" |
| #include "builtin_types.h" |
| extern "C" { |
| #include "program/hash_table.h" |
| } |
| |
| hash_table *glsl_type::array_types = NULL; |
| hash_table *glsl_type::record_types = NULL; |
| void *glsl_type::mem_ctx = NULL; |
| |
| void |
| glsl_type::init_ralloc_type_ctx(void) |
| { |
| if (glsl_type::mem_ctx == NULL) { |
| glsl_type::mem_ctx = ralloc_autofree_context(); |
| assert(glsl_type::mem_ctx != NULL); |
| } |
| } |
| |
| glsl_type::glsl_type(GLenum gl_type, |
| glsl_base_type base_type, unsigned vector_elements, |
| unsigned matrix_columns, const char *name) : |
| gl_type(gl_type), |
| base_type(base_type), |
| sampler_dimensionality(0), sampler_shadow(0), sampler_array(0), |
| sampler_type(0), |
| vector_elements(vector_elements), matrix_columns(matrix_columns), |
| length(0) |
| { |
| init_ralloc_type_ctx(); |
| this->name = ralloc_strdup(this->mem_ctx, name); |
| /* Neither dimension is zero or both dimensions are zero. |
| */ |
| assert((vector_elements == 0) == (matrix_columns == 0)); |
| memset(& fields, 0, sizeof(fields)); |
| } |
| |
| glsl_type::glsl_type(GLenum gl_type, |
| enum glsl_sampler_dim dim, bool shadow, bool array, |
| unsigned type, const char *name) : |
| gl_type(gl_type), |
| base_type(GLSL_TYPE_SAMPLER), |
| sampler_dimensionality(dim), sampler_shadow(shadow), |
| sampler_array(array), sampler_type(type), |
| vector_elements(0), matrix_columns(0), |
| length(0) |
| { |
| init_ralloc_type_ctx(); |
| this->name = ralloc_strdup(this->mem_ctx, name); |
| memset(& fields, 0, sizeof(fields)); |
| } |
| |
| glsl_type::glsl_type(const glsl_struct_field *fields, unsigned num_fields, |
| const char *name) : |
| base_type(GLSL_TYPE_STRUCT), |
| sampler_dimensionality(0), sampler_shadow(0), sampler_array(0), |
| sampler_type(0), |
| vector_elements(0), matrix_columns(0), |
| length(num_fields) |
| { |
| unsigned int i; |
| |
| init_ralloc_type_ctx(); |
| this->name = ralloc_strdup(this->mem_ctx, name); |
| this->fields.structure = ralloc_array(this->mem_ctx, |
| glsl_struct_field, length); |
| for (i = 0; i < length; i++) { |
| this->fields.structure[i].type = fields[i].type; |
| this->fields.structure[i].name = ralloc_strdup(this->fields.structure, |
| fields[i].name); |
| } |
| } |
| |
| static void |
| add_types_to_symbol_table(glsl_symbol_table *symtab, |
| const struct glsl_type *types, |
| unsigned num_types, bool warn) |
| { |
| (void) warn; |
| |
| for (unsigned i = 0; i < num_types; i++) { |
| symtab->add_type(types[i].name, & types[i]); |
| } |
| } |
| |
| bool |
| glsl_type::contains_sampler() const |
| { |
| if (this->is_array()) { |
| return this->fields.array->contains_sampler(); |
| } else if (this->is_record()) { |
| for (unsigned int i = 0; i < this->length; i++) { |
| if (this->fields.structure[i].type->contains_sampler()) |
| return true; |
| } |
| return false; |
| } else { |
| return this->is_sampler(); |
| } |
| } |
| |
| gl_texture_index |
| glsl_type::sampler_index() const |
| { |
| const glsl_type *const t = (this->is_array()) ? this->fields.array : this; |
| |
| assert(t->is_sampler()); |
| |
| switch (t->sampler_dimensionality) { |
| case GLSL_SAMPLER_DIM_1D: |
| return (t->sampler_array) ? TEXTURE_1D_ARRAY_INDEX : TEXTURE_1D_INDEX; |
| case GLSL_SAMPLER_DIM_2D: |
| return (t->sampler_array) ? TEXTURE_2D_ARRAY_INDEX : TEXTURE_2D_INDEX; |
| case GLSL_SAMPLER_DIM_3D: |
| return TEXTURE_3D_INDEX; |
| case GLSL_SAMPLER_DIM_CUBE: |
| return TEXTURE_CUBE_INDEX; |
| case GLSL_SAMPLER_DIM_RECT: |
| return TEXTURE_RECT_INDEX; |
| case GLSL_SAMPLER_DIM_BUF: |
| return TEXTURE_BUFFER_INDEX; |
| case GLSL_SAMPLER_DIM_EXTERNAL: |
| return TEXTURE_EXTERNAL_INDEX; |
| default: |
| assert(!"Should not get here."); |
| return TEXTURE_BUFFER_INDEX; |
| } |
| } |
| |
| void |
| glsl_type::generate_100ES_types(glsl_symbol_table *symtab) |
| { |
| add_types_to_symbol_table(symtab, builtin_core_types, |
| Elements(builtin_core_types), |
| false); |
| add_types_to_symbol_table(symtab, builtin_structure_types, |
| Elements(builtin_structure_types), |
| false); |
| add_types_to_symbol_table(symtab, void_type, 1, false); |
| } |
| |
| void |
| glsl_type::generate_110_types(glsl_symbol_table *symtab, bool add_deprecated) |
| { |
| generate_100ES_types(symtab); |
| |
| add_types_to_symbol_table(symtab, builtin_110_types, |
| Elements(builtin_110_types), |
| false); |
| add_types_to_symbol_table(symtab, &_sampler3D_type, 1, false); |
| if (add_deprecated) { |
| add_types_to_symbol_table(symtab, builtin_110_deprecated_structure_types, |
| Elements(builtin_110_deprecated_structure_types), |
| false); |
| } |
| } |
| |
| |
| void |
| glsl_type::generate_120_types(glsl_symbol_table *symtab, bool add_deprecated) |
| { |
| generate_110_types(symtab, add_deprecated); |
| |
| add_types_to_symbol_table(symtab, builtin_120_types, |
| Elements(builtin_120_types), false); |
| } |
| |
| |
| void |
| glsl_type::generate_130_types(glsl_symbol_table *symtab, bool add_deprecated) |
| { |
| generate_120_types(symtab, add_deprecated); |
| |
| add_types_to_symbol_table(symtab, builtin_130_types, |
| Elements(builtin_130_types), false); |
| generate_EXT_texture_array_types(symtab, false); |
| } |
| |
| |
| void |
| glsl_type::generate_140_types(glsl_symbol_table *symtab) |
| { |
| generate_130_types(symtab, false); |
| |
| add_types_to_symbol_table(symtab, builtin_140_types, |
| Elements(builtin_140_types), false); |
| |
| add_types_to_symbol_table(symtab, builtin_EXT_texture_buffer_object_types, |
| Elements(builtin_EXT_texture_buffer_object_types), |
| false); |
| } |
| |
| |
| void |
| glsl_type::generate_ARB_texture_rectangle_types(glsl_symbol_table *symtab, |
| bool warn) |
| { |
| add_types_to_symbol_table(symtab, builtin_ARB_texture_rectangle_types, |
| Elements(builtin_ARB_texture_rectangle_types), |
| warn); |
| } |
| |
| |
| void |
| glsl_type::generate_EXT_texture_array_types(glsl_symbol_table *symtab, |
| bool warn) |
| { |
| add_types_to_symbol_table(symtab, builtin_EXT_texture_array_types, |
| Elements(builtin_EXT_texture_array_types), |
| warn); |
| } |
| |
| |
| void |
| glsl_type::generate_OES_texture_3D_types(glsl_symbol_table *symtab, bool warn) |
| { |
| add_types_to_symbol_table(symtab, &_sampler3D_type, 1, warn); |
| } |
| |
| |
| void |
| glsl_type::generate_OES_EGL_image_external_types(glsl_symbol_table *symtab, |
| bool warn) |
| { |
| add_types_to_symbol_table(symtab, builtin_OES_EGL_image_external_types, |
| Elements(builtin_OES_EGL_image_external_types), |
| warn); |
| } |
| |
| void |
| _mesa_glsl_initialize_types(struct _mesa_glsl_parse_state *state) |
| { |
| switch (state->language_version) { |
| case 100: |
| assert(state->es_shader); |
| glsl_type::generate_100ES_types(state->symbols); |
| break; |
| case 110: |
| glsl_type::generate_110_types(state->symbols, true); |
| break; |
| case 120: |
| glsl_type::generate_120_types(state->symbols, true); |
| break; |
| case 130: |
| glsl_type::generate_130_types(state->symbols, true); |
| break; |
| case 140: |
| glsl_type::generate_140_types(state->symbols); |
| break; |
| default: |
| /* error */ |
| break; |
| } |
| |
| if (state->ARB_texture_rectangle_enable || |
| state->language_version >= 140) { |
| glsl_type::generate_ARB_texture_rectangle_types(state->symbols, |
| state->ARB_texture_rectangle_warn); |
| } |
| if (state->OES_texture_3D_enable && state->language_version == 100) { |
| glsl_type::generate_OES_texture_3D_types(state->symbols, |
| state->OES_texture_3D_warn); |
| } |
| |
| if (state->EXT_texture_array_enable && state->language_version < 130) { |
| // These are already included in 130; don't create twice. |
| glsl_type::generate_EXT_texture_array_types(state->symbols, |
| state->EXT_texture_array_warn); |
| } |
| |
| /* We cannot check for language_version == 100 here because we need the |
| * types to support fixed-function program generation. But this is fine |
| * since the extension is never enabled for OpenGL contexts. |
| */ |
| if (state->OES_EGL_image_external_enable) { |
| glsl_type::generate_OES_EGL_image_external_types(state->symbols, |
| state->OES_EGL_image_external_warn); |
| } |
| } |
| |
| |
| const glsl_type *glsl_type::get_base_type() const |
| { |
| switch (base_type) { |
| case GLSL_TYPE_UINT: |
| return uint_type; |
| case GLSL_TYPE_INT: |
| return int_type; |
| case GLSL_TYPE_FLOAT: |
| return float_type; |
| case GLSL_TYPE_BOOL: |
| return bool_type; |
| default: |
| return error_type; |
| } |
| } |
| |
| |
| const glsl_type *glsl_type::get_scalar_type() const |
| { |
| const glsl_type *type = this; |
| |
| /* Handle arrays */ |
| while (type->base_type == GLSL_TYPE_ARRAY) |
| type = type->fields.array; |
| |
| /* Handle vectors and matrices */ |
| switch (type->base_type) { |
| case GLSL_TYPE_UINT: |
| return uint_type; |
| case GLSL_TYPE_INT: |
| return int_type; |
| case GLSL_TYPE_FLOAT: |
| return float_type; |
| default: |
| /* Handle everything else */ |
| return type; |
| } |
| } |
| |
| |
| void |
| _mesa_glsl_release_types(void) |
| { |
| if (glsl_type::array_types != NULL) { |
| hash_table_dtor(glsl_type::array_types); |
| glsl_type::array_types = NULL; |
| } |
| |
| if (glsl_type::record_types != NULL) { |
| hash_table_dtor(glsl_type::record_types); |
| glsl_type::record_types = NULL; |
| } |
| } |
| |
| |
| glsl_type::glsl_type(const glsl_type *array, unsigned length) : |
| base_type(GLSL_TYPE_ARRAY), |
| sampler_dimensionality(0), sampler_shadow(0), sampler_array(0), |
| sampler_type(0), |
| vector_elements(0), matrix_columns(0), |
| name(NULL), length(length) |
| { |
| this->fields.array = array; |
| /* Inherit the gl type of the base. The GL type is used for |
| * uniform/statevar handling in Mesa and the arrayness of the type |
| * is represented by the size rather than the type. |
| */ |
| this->gl_type = array->gl_type; |
| |
| /* Allow a maximum of 10 characters for the array size. This is enough |
| * for 32-bits of ~0. The extra 3 are for the '[', ']', and terminating |
| * NUL. |
| */ |
| const unsigned name_length = strlen(array->name) + 10 + 3; |
| char *const n = (char *) ralloc_size(this->mem_ctx, name_length); |
| |
| if (length == 0) |
| snprintf(n, name_length, "%s[]", array->name); |
| else |
| snprintf(n, name_length, "%s[%u]", array->name, length); |
| |
| this->name = n; |
| } |
| |
| |
| const glsl_type * |
| glsl_type::get_instance(unsigned base_type, unsigned rows, unsigned columns) |
| { |
| if (base_type == GLSL_TYPE_VOID) |
| return void_type; |
| |
| if ((rows < 1) || (rows > 4) || (columns < 1) || (columns > 4)) |
| return error_type; |
| |
| /* Treat GLSL vectors as Nx1 matrices. |
| */ |
| if (columns == 1) { |
| switch (base_type) { |
| case GLSL_TYPE_UINT: |
| return uint_type + (rows - 1); |
| case GLSL_TYPE_INT: |
| return int_type + (rows - 1); |
| case GLSL_TYPE_FLOAT: |
| return float_type + (rows - 1); |
| case GLSL_TYPE_BOOL: |
| return bool_type + (rows - 1); |
| default: |
| return error_type; |
| } |
| } else { |
| if ((base_type != GLSL_TYPE_FLOAT) || (rows == 1)) |
| return error_type; |
| |
| /* GLSL matrix types are named mat{COLUMNS}x{ROWS}. Only the following |
| * combinations are valid: |
| * |
| * 1 2 3 4 |
| * 1 |
| * 2 x x x |
| * 3 x x x |
| * 4 x x x |
| */ |
| #define IDX(c,r) (((c-1)*3) + (r-1)) |
| |
| switch (IDX(columns, rows)) { |
| case IDX(2,2): return mat2_type; |
| case IDX(2,3): return mat2x3_type; |
| case IDX(2,4): return mat2x4_type; |
| case IDX(3,2): return mat3x2_type; |
| case IDX(3,3): return mat3_type; |
| case IDX(3,4): return mat3x4_type; |
| case IDX(4,2): return mat4x2_type; |
| case IDX(4,3): return mat4x3_type; |
| case IDX(4,4): return mat4_type; |
| default: return error_type; |
| } |
| } |
| |
| assert(!"Should not get here."); |
| return error_type; |
| } |
| |
| |
| const glsl_type * |
| glsl_type::get_array_instance(const glsl_type *base, unsigned array_size) |
| { |
| |
| if (array_types == NULL) { |
| array_types = hash_table_ctor(64, hash_table_string_hash, |
| hash_table_string_compare); |
| } |
| |
| /* Generate a name using the base type pointer in the key. This is |
| * done because the name of the base type may not be unique across |
| * shaders. For example, two shaders may have different record types |
| * named 'foo'. |
| */ |
| char key[128]; |
| snprintf(key, sizeof(key), "%p[%u]", (void *) base, array_size); |
| |
| const glsl_type *t = (glsl_type *) hash_table_find(array_types, key); |
| if (t == NULL) { |
| t = new glsl_type(base, array_size); |
| |
| hash_table_insert(array_types, (void *) t, ralloc_strdup(mem_ctx, key)); |
| } |
| |
| assert(t->base_type == GLSL_TYPE_ARRAY); |
| assert(t->length == array_size); |
| assert(t->fields.array == base); |
| |
| return t; |
| } |
| |
| |
| int |
| glsl_type::record_key_compare(const void *a, const void *b) |
| { |
| const glsl_type *const key1 = (glsl_type *) a; |
| const glsl_type *const key2 = (glsl_type *) b; |
| |
| /* Return zero is the types match (there is zero difference) or non-zero |
| * otherwise. |
| */ |
| if (strcmp(key1->name, key2->name) != 0) |
| return 1; |
| |
| if (key1->length != key2->length) |
| return 1; |
| |
| for (unsigned i = 0; i < key1->length; i++) { |
| if (key1->fields.structure[i].type != key2->fields.structure[i].type) |
| return 1; |
| if (strcmp(key1->fields.structure[i].name, |
| key2->fields.structure[i].name) != 0) |
| return 1; |
| } |
| |
| return 0; |
| } |
| |
| |
| unsigned |
| glsl_type::record_key_hash(const void *a) |
| { |
| const glsl_type *const key = (glsl_type *) a; |
| char hash_key[128]; |
| unsigned size = 0; |
| |
| size = snprintf(hash_key, sizeof(hash_key), "%08x", key->length); |
| |
| for (unsigned i = 0; i < key->length; i++) { |
| if (size >= sizeof(hash_key)) |
| break; |
| |
| size += snprintf(& hash_key[size], sizeof(hash_key) - size, |
| "%p", (void *) key->fields.structure[i].type); |
| } |
| |
| return hash_table_string_hash(& hash_key); |
| } |
| |
| |
| const glsl_type * |
| glsl_type::get_record_instance(const glsl_struct_field *fields, |
| unsigned num_fields, |
| const char *name) |
| { |
| const glsl_type key(fields, num_fields, name); |
| |
| if (record_types == NULL) { |
| record_types = hash_table_ctor(64, record_key_hash, record_key_compare); |
| } |
| |
| const glsl_type *t = (glsl_type *) hash_table_find(record_types, & key); |
| if (t == NULL) { |
| t = new glsl_type(fields, num_fields, name); |
| |
| hash_table_insert(record_types, (void *) t, t); |
| } |
| |
| assert(t->base_type == GLSL_TYPE_STRUCT); |
| assert(t->length == num_fields); |
| assert(strcmp(t->name, name) == 0); |
| |
| return t; |
| } |
| |
| |
| const glsl_type * |
| glsl_type::field_type(const char *name) const |
| { |
| if (this->base_type != GLSL_TYPE_STRUCT) |
| return error_type; |
| |
| for (unsigned i = 0; i < this->length; i++) { |
| if (strcmp(name, this->fields.structure[i].name) == 0) |
| return this->fields.structure[i].type; |
| } |
| |
| return error_type; |
| } |
| |
| |
| int |
| glsl_type::field_index(const char *name) const |
| { |
| if (this->base_type != GLSL_TYPE_STRUCT) |
| return -1; |
| |
| for (unsigned i = 0; i < this->length; i++) { |
| if (strcmp(name, this->fields.structure[i].name) == 0) |
| return i; |
| } |
| |
| return -1; |
| } |
| |
| |
| unsigned |
| glsl_type::component_slots() const |
| { |
| switch (this->base_type) { |
| case GLSL_TYPE_UINT: |
| case GLSL_TYPE_INT: |
| case GLSL_TYPE_FLOAT: |
| case GLSL_TYPE_BOOL: |
| return this->components(); |
| |
| case GLSL_TYPE_STRUCT: { |
| unsigned size = 0; |
| |
| for (unsigned i = 0; i < this->length; i++) |
| size += this->fields.structure[i].type->component_slots(); |
| |
| return size; |
| } |
| |
| case GLSL_TYPE_ARRAY: |
| return this->length * this->fields.array->component_slots(); |
| |
| default: |
| return 0; |
| } |
| } |
| |
| bool |
| glsl_type::can_implicitly_convert_to(const glsl_type *desired) const |
| { |
| if (this == desired) |
| return true; |
| |
| /* There is no conversion among matrix types. */ |
| if (this->matrix_columns > 1 || desired->matrix_columns > 1) |
| return false; |
| |
| /* int and uint can be converted to float. */ |
| return desired->is_float() |
| && this->is_integer() |
| && this->vector_elements == desired->vector_elements; |
| } |
| |
| unsigned |
| glsl_type::std140_base_alignment(bool row_major) const |
| { |
| /* (1) If the member is a scalar consuming <N> basic machine units, the |
| * base alignment is <N>. |
| * |
| * (2) If the member is a two- or four-component vector with components |
| * consuming <N> basic machine units, the base alignment is 2<N> or |
| * 4<N>, respectively. |
| * |
| * (3) If the member is a three-component vector with components consuming |
| * <N> basic machine units, the base alignment is 4<N>. |
| */ |
| if (this->is_scalar() || this->is_vector()) { |
| switch (this->vector_elements) { |
| case 1: |
| return 4; |
| case 2: |
| return 8; |
| case 3: |
| case 4: |
| return 16; |
| } |
| } |
| |
| /* (4) If the member is an array of scalars or vectors, the base alignment |
| * and array stride are set to match the base alignment of a single |
| * array element, according to rules (1), (2), and (3), and rounded up |
| * to the base alignment of a vec4. The array may have padding at the |
| * end; the base offset of the member following the array is rounded up |
| * to the next multiple of the base alignment. |
| * |
| * (6) If the member is an array of <S> column-major matrices with <C> |
| * columns and <R> rows, the matrix is stored identically to a row of |
| * <S>*<C> column vectors with <R> components each, according to rule |
| * (4). |
| * |
| * (8) If the member is an array of <S> row-major matrices with <C> columns |
| * and <R> rows, the matrix is stored identically to a row of <S>*<R> |
| * row vectors with <C> components each, according to rule (4). |
| * |
| * (10) If the member is an array of <S> structures, the <S> elements of |
| * the array are laid out in order, according to rule (9). |
| */ |
| if (this->is_array()) { |
| if (this->fields.array->is_scalar() || |
| this->fields.array->is_vector() || |
| this->fields.array->is_matrix()) { |
| return MAX2(this->fields.array->std140_base_alignment(row_major), 16); |
| } else { |
| assert(this->fields.array->is_record()); |
| return this->fields.array->std140_base_alignment(row_major); |
| } |
| } |
| |
| /* (5) If the member is a column-major matrix with <C> columns and |
| * <R> rows, the matrix is stored identically to an array of |
| * <C> column vectors with <R> components each, according to |
| * rule (4). |
| * |
| * (7) If the member is a row-major matrix with <C> columns and <R> |
| * rows, the matrix is stored identically to an array of <R> |
| * row vectors with <C> components each, according to rule (4). |
| */ |
| if (this->is_matrix()) { |
| const struct glsl_type *vec_type, *array_type; |
| int c = this->matrix_columns; |
| int r = this->vector_elements; |
| |
| if (row_major) { |
| vec_type = get_instance(GLSL_TYPE_FLOAT, c, 1); |
| array_type = glsl_type::get_array_instance(vec_type, r); |
| } else { |
| vec_type = get_instance(GLSL_TYPE_FLOAT, r, 1); |
| array_type = glsl_type::get_array_instance(vec_type, c); |
| } |
| |
| return array_type->std140_base_alignment(false); |
| } |
| |
| /* (9) If the member is a structure, the base alignment of the |
| * structure is <N>, where <N> is the largest base alignment |
| * value of any of its members, and rounded up to the base |
| * alignment of a vec4. The individual members of this |
| * sub-structure are then assigned offsets by applying this set |
| * of rules recursively, where the base offset of the first |
| * member of the sub-structure is equal to the aligned offset |
| * of the structure. The structure may have padding at the end; |
| * the base offset of the member following the sub-structure is |
| * rounded up to the next multiple of the base alignment of the |
| * structure. |
| */ |
| if (this->is_record()) { |
| unsigned base_alignment = 16; |
| for (unsigned i = 0; i < this->length; i++) { |
| const struct glsl_type *field_type = this->fields.structure[i].type; |
| base_alignment = MAX2(base_alignment, |
| field_type->std140_base_alignment(row_major)); |
| } |
| return base_alignment; |
| } |
| |
| assert(!"not reached"); |
| return -1; |
| } |
| |
| static unsigned |
| align(unsigned val, unsigned align) |
| { |
| return (val + align - 1) / align * align; |
| } |
| |
| unsigned |
| glsl_type::std140_size(bool row_major) const |
| { |
| /* (1) If the member is a scalar consuming <N> basic machine units, the |
| * base alignment is <N>. |
| * |
| * (2) If the member is a two- or four-component vector with components |
| * consuming <N> basic machine units, the base alignment is 2<N> or |
| * 4<N>, respectively. |
| * |
| * (3) If the member is a three-component vector with components consuming |
| * <N> basic machine units, the base alignment is 4<N>. |
| */ |
| if (this->is_scalar() || this->is_vector()) { |
| return this->vector_elements * 4; |
| } |
| |
| /* (5) If the member is a column-major matrix with <C> columns and |
| * <R> rows, the matrix is stored identically to an array of |
| * <C> column vectors with <R> components each, according to |
| * rule (4). |
| * |
| * (6) If the member is an array of <S> column-major matrices with <C> |
| * columns and <R> rows, the matrix is stored identically to a row of |
| * <S>*<C> column vectors with <R> components each, according to rule |
| * (4). |
| * |
| * (7) If the member is a row-major matrix with <C> columns and <R> |
| * rows, the matrix is stored identically to an array of <R> |
| * row vectors with <C> components each, according to rule (4). |
| * |
| * (8) If the member is an array of <S> row-major matrices with <C> columns |
| * and <R> rows, the matrix is stored identically to a row of <S>*<R> |
| * row vectors with <C> components each, according to rule (4). |
| */ |
| if (this->is_matrix() || (this->is_array() && |
| this->fields.array->is_matrix())) { |
| const struct glsl_type *element_type; |
| const struct glsl_type *vec_type; |
| unsigned int array_len; |
| |
| if (this->is_array()) { |
| element_type = this->fields.array; |
| array_len = this->length; |
| } else { |
| element_type = this; |
| array_len = 1; |
| } |
| |
| if (row_major) { |
| vec_type = get_instance(GLSL_TYPE_FLOAT, |
| element_type->matrix_columns, 1); |
| array_len *= element_type->vector_elements; |
| } else { |
| vec_type = get_instance(GLSL_TYPE_FLOAT, |
| element_type->vector_elements, 1); |
| array_len *= element_type->matrix_columns; |
| } |
| const glsl_type *array_type = glsl_type::get_array_instance(vec_type, |
| array_len); |
| |
| return array_type->std140_size(false); |
| } |
| |
| /* (4) If the member is an array of scalars or vectors, the base alignment |
| * and array stride are set to match the base alignment of a single |
| * array element, according to rules (1), (2), and (3), and rounded up |
| * to the base alignment of a vec4. The array may have padding at the |
| * end; the base offset of the member following the array is rounded up |
| * to the next multiple of the base alignment. |
| * |
| * (10) If the member is an array of <S> structures, the <S> elements of |
| * the array are laid out in order, according to rule (9). |
| */ |
| if (this->is_array()) { |
| if (this->fields.array->is_record()) { |
| return this->length * this->fields.array->std140_size(row_major); |
| } else { |
| unsigned element_base_align = |
| this->fields.array->std140_base_alignment(row_major); |
| return this->length * MAX2(element_base_align, 16); |
| } |
| } |
| |
| /* (9) If the member is a structure, the base alignment of the |
| * structure is <N>, where <N> is the largest base alignment |
| * value of any of its members, and rounded up to the base |
| * alignment of a vec4. The individual members of this |
| * sub-structure are then assigned offsets by applying this set |
| * of rules recursively, where the base offset of the first |
| * member of the sub-structure is equal to the aligned offset |
| * of the structure. The structure may have padding at the end; |
| * the base offset of the member following the sub-structure is |
| * rounded up to the next multiple of the base alignment of the |
| * structure. |
| */ |
| if (this->is_record()) { |
| unsigned size = 0; |
| for (unsigned i = 0; i < this->length; i++) { |
| const struct glsl_type *field_type = this->fields.structure[i].type; |
| unsigned align = field_type->std140_base_alignment(row_major); |
| size = (size + align - 1) / align * align; |
| size += field_type->std140_size(row_major); |
| } |
| size = align(size, |
| this->fields.structure[0].type->std140_base_alignment(row_major)); |
| return size; |
| } |
| |
| assert(!"not reached"); |
| return -1; |
| } |