X-Git-Url: https://git.libre-soc.org/?a=blobdiff_plain;f=src%2Fglsl%2Fglsl_types.cpp;h=80a6e71a721d4fdf60d5a50eb68bafcd1daf68c4;hb=b8d7a97fade140b8fb7c464afc24b210f1fe4ff7;hp=8e80cf99e96443d12f3688573f3fb70ad051c5b4;hpb=261bbc011d11ab9e390cd5fe9f5151821eefaffa;p=mesa.git diff --git a/src/glsl/glsl_types.cpp b/src/glsl/glsl_types.cpp index 8e80cf99e96..80a6e71a721 100644 --- a/src/glsl/glsl_types.cpp +++ b/src/glsl/glsl_types.cpp @@ -21,42 +21,43 @@ * DEALINGS IN THE SOFTWARE. */ -#include +#include #include -#include "main/compiler.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; +hash_table *glsl_type::interface_types = NULL; void *glsl_type::mem_ctx = NULL; void -glsl_type::init_talloc_type_ctx(void) +glsl_type::init_ralloc_type_ctx(void) { if (glsl_type::mem_ctx == NULL) { - glsl_type::mem_ctx = talloc_init("glsl_type"); + glsl_type::mem_ctx = ralloc_autofree_context(); assert(glsl_type::mem_ctx != NULL); } } glsl_type::glsl_type(GLenum gl_type, - unsigned base_type, unsigned vector_elements, + 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), + sampler_type(0), interface_packing(0), vector_elements(vector_elements), matrix_columns(matrix_columns), length(0) { - init_talloc_type_ctx(); - this->name = talloc_strdup(this->mem_ctx, name); + init_ralloc_type_ctx(); + assert(name != NULL); + this->name = ralloc_strdup(this->mem_ctx, name); /* Neither dimension is zero or both dimensions are zero. */ assert((vector_elements == 0) == (matrix_columns == 0)); @@ -69,140 +70,159 @@ glsl_type::glsl_type(GLenum gl_type, gl_type(gl_type), base_type(GLSL_TYPE_SAMPLER), sampler_dimensionality(dim), sampler_shadow(shadow), - sampler_array(array), sampler_type(type), + sampler_array(array), sampler_type(type), interface_packing(0), vector_elements(0), matrix_columns(0), length(0) { - init_talloc_type_ctx(); - this->name = talloc_strdup(this->mem_ctx, name); + init_ralloc_type_ctx(); + assert(name != NULL); + 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) : + gl_type(0), base_type(GLSL_TYPE_STRUCT), sampler_dimensionality(0), sampler_shadow(0), sampler_array(0), - sampler_type(0), + sampler_type(0), interface_packing(0), vector_elements(0), matrix_columns(0), length(num_fields) { unsigned int i; - init_talloc_type_ctx(); - this->name = talloc_strdup(this->mem_ctx, name); - this->fields.structure = talloc_array(this->mem_ctx, + init_ralloc_type_ctx(); + assert(name != NULL); + 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 = talloc_strdup(this->fields.structure, + this->fields.structure[i].name = ralloc_strdup(this->fields.structure, fields[i].name); + this->fields.structure[i].location = fields[i].location; + this->fields.structure[i].row_major = fields[i].row_major; } } -static void -add_types_to_symbol_table(glsl_symbol_table *symtab, - const struct glsl_type *types, - unsigned num_types, bool warn) +glsl_type::glsl_type(const glsl_struct_field *fields, unsigned num_fields, + enum glsl_interface_packing packing, const char *name) : + gl_type(0), + base_type(GLSL_TYPE_INTERFACE), + sampler_dimensionality(0), sampler_shadow(0), sampler_array(0), + sampler_type(0), interface_packing((unsigned) packing), + vector_elements(0), matrix_columns(0), + length(num_fields) { - (void) warn; + unsigned int i; - for (unsigned i = 0; i < num_types; i++) { - symtab->add_type(types[i].name, & types[i]); + init_ralloc_type_ctx(); + assert(name != NULL); + 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); + this->fields.structure[i].location = fields[i].location; + this->fields.structure[i].row_major = fields[i].row_major; } } -void -glsl_type::generate_110_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, builtin_110_deprecated_structure_types, - Elements(builtin_110_deprecated_structure_types), - false); - add_types_to_symbol_table(symtab, & void_type, 1, false); -} - - -void -glsl_type::generate_120_types(glsl_symbol_table *symtab) -{ - generate_110_types(symtab); - - 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 +glsl_type::contains_sampler() const { - generate_120_types(symtab); - - add_types_to_symbol_table(symtab, builtin_130_types, - Elements(builtin_130_types), false); - generate_EXT_texture_array_types(symtab, false); + 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(); + } } -void -glsl_type::generate_ARB_texture_rectangle_types(glsl_symbol_table *symtab, - bool warn) +bool +glsl_type::contains_integer() const { - add_types_to_symbol_table(symtab, builtin_ARB_texture_rectangle_types, - Elements(builtin_ARB_texture_rectangle_types), - warn); + if (this->is_array()) { + return this->fields.array->contains_integer(); + } else if (this->is_record()) { + for (unsigned int i = 0; i < this->length; i++) { + if (this->fields.structure[i].type->contains_integer()) + return true; + } + return false; + } else { + return this->is_integer(); + } } -void -glsl_type::generate_EXT_texture_array_types(glsl_symbol_table *symtab, - bool warn) +gl_texture_index +glsl_type::sampler_index() const { - add_types_to_symbol_table(symtab, builtin_EXT_texture_array_types, - Elements(builtin_EXT_texture_array_types), - warn); + 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 (t->sampler_array) ? TEXTURE_CUBE_ARRAY_INDEX : 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; + case GLSL_SAMPLER_DIM_MS: + return (t->sampler_array) ? TEXTURE_2D_MULTISAMPLE_ARRAY_INDEX : TEXTURE_2D_MULTISAMPLE_INDEX; + default: + assert(!"Should not get here."); + return TEXTURE_BUFFER_INDEX; + } } -void -_mesa_glsl_initialize_types(struct _mesa_glsl_parse_state *state) +const glsl_type *glsl_type::get_base_type() const { - switch (state->language_version) { - case 110: - glsl_type::generate_110_types(state->symbols); - break; - case 120: - glsl_type::generate_120_types(state->symbols); - break; - case 130: - glsl_type::generate_130_types(state->symbols); - break; + 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: - /* error */ - break; - } - - if (state->ARB_texture_rectangle_enable) { - glsl_type::generate_ARB_texture_rectangle_types(state->symbols, - state->ARB_texture_rectangle_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); + return error_type; } } -const glsl_type *glsl_type::get_base_type() const +const glsl_type *glsl_type::get_scalar_type() const { - switch (base_type) { + 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: @@ -212,7 +232,8 @@ const glsl_type *glsl_type::get_base_type() const case GLSL_TYPE_BOOL: return bool_type; default: - return error_type; + /* Handle everything else */ + return type; } } @@ -229,79 +250,13 @@ _mesa_glsl_release_types(void) hash_table_dtor(glsl_type::record_types); glsl_type::record_types = NULL; } - - if (glsl_type::mem_ctx != NULL) { - talloc_free(glsl_type::mem_ctx); - glsl_type::mem_ctx = NULL; - } -} - - -ir_function * -glsl_type::generate_constructor(glsl_symbol_table *symtab) const -{ - void *ctx = symtab; - - /* Generate the function name and add it to the symbol table. - */ - ir_function *const f = new(ctx) ir_function(name); - - bool added = symtab->add_function(name, f); - assert(added); - - ir_function_signature *const sig = new(ctx) ir_function_signature(this); - f->add_signature(sig); - - ir_variable **declarations = - (ir_variable **) malloc(sizeof(ir_variable *) * this->length); - for (unsigned i = 0; i < length; i++) { - char *const param_name = (char *) malloc(10); - - snprintf(param_name, 10, "p%08X", i); - - ir_variable *var = (this->base_type == GLSL_TYPE_ARRAY) - ? new(ctx) ir_variable(fields.array, param_name, ir_var_in) - : new(ctx) ir_variable(fields.structure[i].type, param_name, ir_var_in); - - declarations[i] = var; - sig->parameters.push_tail(var); - } - - /* Generate the body of the constructor. The body assigns each of the - * parameters to a portion of a local variable called _ret_val that has - * the same type as the constructor. After initializing _ret_val, - * _ret_val is returned. - */ - ir_variable *retval = new(ctx) ir_variable(this, "_ret_val", ir_var_auto); - sig->body.push_tail(retval); - - for (unsigned i = 0; i < length; i++) { - ir_dereference *const lhs = (this->base_type == GLSL_TYPE_ARRAY) - ? (ir_dereference *) new(ctx) ir_dereference_array(retval, - new(ctx) ir_constant(i)) - : (ir_dereference *) new(ctx) ir_dereference_record(retval, - fields.structure[i].name); - - ir_dereference *const rhs = new(ctx) ir_dereference_variable(declarations[i]); - ir_instruction *const assign = new(ctx) ir_assignment(lhs, rhs, NULL); - - sig->body.push_tail(assign); - } - - free(declarations); - - ir_dereference *const retref = new(ctx) ir_dereference_variable(retval); - ir_instruction *const inst = new(ctx) ir_return(retref); - sig->body.push_tail(inst); - - return f; } 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), + sampler_type(0), interface_packing(0), vector_elements(0), matrix_columns(0), name(NULL), length(length) { @@ -317,7 +272,7 @@ glsl_type::glsl_type(const glsl_type *array, unsigned length) : * NUL. */ const unsigned name_length = strlen(array->name) + 10 + 3; - char *const n = (char *) talloc_size(this->mem_ctx, name_length); + char *const n = (char *) ralloc_size(this->mem_ctx, name_length); if (length == 0) snprintf(n, name_length, "%s[]", array->name); @@ -328,11 +283,63 @@ glsl_type::glsl_type(const glsl_type *array, unsigned length) : } +const glsl_type * +glsl_type::vec(unsigned components) +{ + if (components == 0 || components > 4) + return error_type; + + static const glsl_type *const ts[] = { + float_type, vec2_type, vec3_type, vec4_type + }; + return ts[components - 1]; +} + + +const glsl_type * +glsl_type::ivec(unsigned components) +{ + if (components == 0 || components > 4) + return error_type; + + static const glsl_type *const ts[] = { + int_type, ivec2_type, ivec3_type, ivec4_type + }; + return ts[components - 1]; +} + + +const glsl_type * +glsl_type::uvec(unsigned components) +{ + if (components == 0 || components > 4) + return error_type; + + static const glsl_type *const ts[] = { + uint_type, uvec2_type, uvec3_type, uvec4_type + }; + return ts[components - 1]; +} + + +const glsl_type * +glsl_type::bvec(unsigned components) +{ + if (components == 0 || components > 4) + return error_type; + + static const glsl_type *const ts[] = { + bool_type, bvec2_type, bvec3_type, bvec4_type + }; + return ts[components - 1]; +} + + const glsl_type * glsl_type::get_instance(unsigned base_type, unsigned rows, unsigned columns) { if (base_type == GLSL_TYPE_VOID) - return &void_type; + return void_type; if ((rows < 1) || (rows > 4) || (columns < 1) || (columns > 4)) return error_type; @@ -342,13 +349,13 @@ glsl_type::get_instance(unsigned base_type, unsigned rows, unsigned columns) if (columns == 1) { switch (base_type) { case GLSL_TYPE_UINT: - return uint_type + (rows - 1); + return uvec(rows); case GLSL_TYPE_INT: - return int_type + (rows - 1); + return ivec(rows); case GLSL_TYPE_FLOAT: - return float_type + (rows - 1); + return vec(rows); case GLSL_TYPE_BOOL: - return bool_type + (rows - 1); + return bvec(rows); default: return error_type; } @@ -407,7 +414,7 @@ glsl_type::get_array_instance(const glsl_type *base, unsigned array_size) if (t == NULL) { t = new glsl_type(base, array_size); - hash_table_insert(array_types, (void *) t, talloc_strdup(mem_ctx, key)); + hash_table_insert(array_types, (void *) t, ralloc_strdup(mem_ctx, key)); } assert(t->base_type == GLSL_TYPE_ARRAY); @@ -433,12 +440,21 @@ glsl_type::record_key_compare(const void *a, const void *b) if (key1->length != key2->length) return 1; + if (key1->interface_packing != key2->interface_packing) + 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; + if (key1->fields.structure[i].row_major + != key2->fields.structure[i].row_major) + return 1; + if (key1->fields.structure[i].location + != key2->fields.structure[i].location) + return 1; } return 0; @@ -492,10 +508,38 @@ glsl_type::get_record_instance(const glsl_struct_field *fields, } +const glsl_type * +glsl_type::get_interface_instance(const glsl_struct_field *fields, + unsigned num_fields, + enum glsl_interface_packing packing, + const char *block_name) +{ + const glsl_type key(fields, num_fields, packing, block_name); + + if (interface_types == NULL) { + interface_types = hash_table_ctor(64, record_key_hash, record_key_compare); + } + + const glsl_type *t = (glsl_type *) hash_table_find(interface_types, & key); + if (t == NULL) { + t = new glsl_type(fields, num_fields, packing, block_name); + + hash_table_insert(interface_types, (void *) t, t); + } + + assert(t->base_type == GLSL_TYPE_INTERFACE); + assert(t->length == num_fields); + assert(strcmp(t->name, block_name) == 0); + + return t; +} + + const glsl_type * glsl_type::field_type(const char *name) const { - if (this->base_type != GLSL_TYPE_STRUCT) + if (this->base_type != GLSL_TYPE_STRUCT + && this->base_type != GLSL_TYPE_INTERFACE) return error_type; for (unsigned i = 0; i < this->length; i++) { @@ -510,7 +554,8 @@ glsl_type::field_type(const char *name) const int glsl_type::field_index(const char *name) const { - if (this->base_type != GLSL_TYPE_STRUCT) + if (this->base_type != GLSL_TYPE_STRUCT + && this->base_type != GLSL_TYPE_INTERFACE) return -1; for (unsigned i = 0; i < this->length; i++) { @@ -532,7 +577,8 @@ glsl_type::component_slots() const case GLSL_TYPE_BOOL: return this->components(); - case GLSL_TYPE_STRUCT: { + case GLSL_TYPE_STRUCT: + case GLSL_TYPE_INTERFACE: { unsigned size = 0; for (unsigned i = 0; i < this->length; i++) @@ -544,7 +590,336 @@ glsl_type::component_slots() const case GLSL_TYPE_ARRAY: return this->length * this->fields.array->component_slots(); + case GLSL_TYPE_SAMPLER: + case GLSL_TYPE_VOID: + case GLSL_TYPE_ERROR: + break; + } + + 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 basic machine units, the + * base alignment is . + * + * (2) If the member is a two- or four-component vector with components + * consuming basic machine units, the base alignment is 2 or + * 4, respectively. + * + * (3) If the member is a three-component vector with components consuming + * basic machine units, the base alignment is 4. + */ + 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 column-major matrices with + * columns and rows, the matrix is stored identically to a row of + * * column vectors with components each, according to rule + * (4). + * + * (8) If the member is an array of row-major matrices with columns + * and rows, the matrix is stored identically to a row of * + * row vectors with components each, according to rule (4). + * + * (10) If the member is an array of structures, the 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 columns and + * rows, the matrix is stored identically to an array of + * column vectors with components each, according to + * rule (4). + * + * (7) If the member is a row-major matrix with columns and + * rows, the matrix is stored identically to an array of + * row vectors with 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 , where 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; +} + +unsigned +glsl_type::std140_size(bool row_major) const +{ + /* (1) If the member is a scalar consuming basic machine units, the + * base alignment is . + * + * (2) If the member is a two- or four-component vector with components + * consuming basic machine units, the base alignment is 2 or + * 4, respectively. + * + * (3) If the member is a three-component vector with components consuming + * basic machine units, the base alignment is 4. + */ + if (this->is_scalar() || this->is_vector()) { + return this->vector_elements * 4; + } + + /* (5) If the member is a column-major matrix with columns and + * rows, the matrix is stored identically to an array of + * column vectors with components each, according to + * rule (4). + * + * (6) If the member is an array of column-major matrices with + * columns and rows, the matrix is stored identically to a row of + * * column vectors with components each, according to rule + * (4). + * + * (7) If the member is a row-major matrix with columns and + * rows, the matrix is stored identically to an array of + * row vectors with components each, according to rule (4). + * + * (8) If the member is an array of row-major matrices with columns + * and rows, the matrix is stored identically to a row of * + * row vectors with 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 structures, the 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 , where 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 = glsl_align(size, align); + size += field_type->std140_size(row_major); + } + size = glsl_align(size, + this->fields.structure[0].type->std140_base_alignment(row_major)); + return size; + } + + assert(!"not reached"); + return -1; +} + + +unsigned +glsl_type::count_attribute_slots() const +{ + /* From page 31 (page 37 of the PDF) of the GLSL 1.50 spec: + * + * "A scalar input counts the same amount against this limit as a vec4, + * so applications may want to consider packing groups of four + * unrelated float inputs together into a vector to better utilize the + * capabilities of the underlying hardware. A matrix input will use up + * multiple locations. The number of locations used will equal the + * number of columns in the matrix." + * + * The spec does not explicitly say how arrays are counted. However, it + * should be safe to assume the total number of slots consumed by an array + * is the number of entries in the array multiplied by the number of slots + * consumed by a single element of the array. + * + * The spec says nothing about how structs are counted, because vertex + * attributes are not allowed to be (or contain) structs. However, Mesa + * allows varying structs, the number of varying slots taken up by a + * varying struct is simply equal to the sum of the number of slots taken + * up by each element. + */ + switch (this->base_type) { + case GLSL_TYPE_UINT: + case GLSL_TYPE_INT: + case GLSL_TYPE_FLOAT: + case GLSL_TYPE_BOOL: + return this->matrix_columns; + + case GLSL_TYPE_STRUCT: + case GLSL_TYPE_INTERFACE: { + unsigned size = 0; + + for (unsigned i = 0; i < this->length; i++) + size += this->fields.structure[i].type->count_attribute_slots(); + + return size; + } + + case GLSL_TYPE_ARRAY: + return this->length * this->fields.array->count_attribute_slots(); + + case GLSL_TYPE_SAMPLER: + case GLSL_TYPE_VOID: + case GLSL_TYPE_ERROR: + break; + } + + assert(!"Unexpected type in count_attribute_slots()"); + + return 0; +} + +int +glsl_type::sampler_coordinate_components() const +{ + assert(is_sampler()); + + int size; + + switch (sampler_dimensionality) { + case GLSL_SAMPLER_DIM_1D: + case GLSL_SAMPLER_DIM_BUF: + size = 1; + break; + case GLSL_SAMPLER_DIM_2D: + case GLSL_SAMPLER_DIM_RECT: + case GLSL_SAMPLER_DIM_MS: + case GLSL_SAMPLER_DIM_EXTERNAL: + size = 2; + break; + case GLSL_SAMPLER_DIM_3D: + case GLSL_SAMPLER_DIM_CUBE: + size = 3; + break; default: - return 0; + assert(!"Should not get here."); + size = 1; + break; } + + /* Array textures need an additional component for the array index. */ + if (sampler_array) + size += 1; + + return size; }