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
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_ralloc_type_ctx();
+ assert(name != NULL);
this->name = ralloc_strdup(this->mem_ctx, name);
/* Neither dimension is zero or both dimensions are zero.
*/
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_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_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);
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].row_major = fields[i].row_major;
+ }
+}
+
+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)
+{
+ unsigned int 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].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)
+ unsigned num_types, bool warn,
+ bool skip_1d)
{
(void) warn;
for (unsigned i = 0; i < num_types; i++) {
+ if (skip_1d && types[i].base_type == GLSL_TYPE_SAMPLER
+ && types[i].sampler_dimensionality == GLSL_SAMPLER_DIM_1D)
+ continue;
+
symtab->add_type(types[i].name, & types[i]);
}
}
}
}
+
+bool
+glsl_type::contains_integer() const
+{
+ 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();
+ }
+}
+
+
+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 (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
glsl_type::generate_100ES_types(glsl_symbol_table *symtab)
{
+ bool skip_1d = false;
add_types_to_symbol_table(symtab, builtin_core_types,
Elements(builtin_core_types),
- false);
+ false, skip_1d);
add_types_to_symbol_table(symtab, builtin_structure_types,
Elements(builtin_structure_types),
- false);
- add_types_to_symbol_table(symtab, void_type, 1, false);
+ false, skip_1d);
+ add_types_to_symbol_table(symtab, void_type, 1, false, skip_1d);
}
void
-glsl_type::generate_110_types(glsl_symbol_table *symtab)
+glsl_type::generate_300ES_types(glsl_symbol_table *symtab)
+{
+ /* GLSL 3.00 ES types are the same as GLSL 1.30 types, except that 1D
+ * samplers are skipped, and samplerCubeShadow is added.
+ */
+ bool add_deprecated = false;
+ bool skip_1d = true;
+
+ generate_130_types(symtab, add_deprecated, skip_1d);
+
+ add_types_to_symbol_table(symtab, &_samplerCubeShadow_type, 1, false,
+ skip_1d);
+}
+
+void
+glsl_type::generate_110_types(glsl_symbol_table *symtab, bool add_deprecated,
+ bool skip_1d)
{
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);
- add_types_to_symbol_table(symtab, builtin_110_deprecated_structure_types,
- Elements(builtin_110_deprecated_structure_types),
- false);
+ false, skip_1d);
+ add_types_to_symbol_table(symtab, &_sampler3D_type, 1, false, skip_1d);
+ if (add_deprecated) {
+ add_types_to_symbol_table(symtab, builtin_110_deprecated_structure_types,
+ Elements(builtin_110_deprecated_structure_types),
+ false, skip_1d);
+ }
}
void
-glsl_type::generate_120_types(glsl_symbol_table *symtab)
+glsl_type::generate_120_types(glsl_symbol_table *symtab, bool add_deprecated,
+ bool skip_1d)
{
- generate_110_types(symtab);
+ generate_110_types(symtab, add_deprecated, skip_1d);
add_types_to_symbol_table(symtab, builtin_120_types,
- Elements(builtin_120_types), false);
+ Elements(builtin_120_types), false, skip_1d);
}
void
-glsl_type::generate_130_types(glsl_symbol_table *symtab)
+glsl_type::generate_130_types(glsl_symbol_table *symtab, bool add_deprecated,
+ bool skip_1d)
{
- generate_120_types(symtab);
+ generate_120_types(symtab, add_deprecated, skip_1d);
add_types_to_symbol_table(symtab, builtin_130_types,
- Elements(builtin_130_types), false);
+ Elements(builtin_130_types), false, skip_1d);
generate_EXT_texture_array_types(symtab, false);
}
+void
+glsl_type::generate_140_types(glsl_symbol_table *symtab)
+{
+ bool skip_1d = false;
+
+ generate_130_types(symtab, false, skip_1d);
+
+ add_types_to_symbol_table(symtab, builtin_140_types,
+ Elements(builtin_140_types), false, skip_1d);
+
+ add_types_to_symbol_table(symtab, builtin_EXT_texture_buffer_object_types,
+ Elements(builtin_EXT_texture_buffer_object_types),
+ false, skip_1d);
+}
+
+
+void
+glsl_type::generate_150_types(glsl_symbol_table *symtab)
+{
+ generate_140_types(symtab);
+ generate_ARB_texture_multisample_types(symtab, false);
+}
+
+
void
glsl_type::generate_ARB_texture_rectangle_types(glsl_symbol_table *symtab,
bool warn)
{
+ bool skip_1d = false;
+
add_types_to_symbol_table(symtab, builtin_ARB_texture_rectangle_types,
Elements(builtin_ARB_texture_rectangle_types),
- warn);
+ warn, skip_1d);
}
glsl_type::generate_EXT_texture_array_types(glsl_symbol_table *symtab,
bool warn)
{
+ bool skip_1d = false;
+
add_types_to_symbol_table(symtab, builtin_EXT_texture_array_types,
Elements(builtin_EXT_texture_array_types),
- warn);
+ warn, skip_1d);
}
void
glsl_type::generate_OES_texture_3D_types(glsl_symbol_table *symtab, bool warn)
{
- add_types_to_symbol_table(symtab, &_sampler3D_type, 1, warn);
+ bool skip_1d = false;
+
+ add_types_to_symbol_table(symtab, &_sampler3D_type, 1, warn, skip_1d);
}
+void
+glsl_type::generate_OES_EGL_image_external_types(glsl_symbol_table *symtab,
+ bool warn)
+{
+ bool skip_1d = false;
+
+ add_types_to_symbol_table(symtab, builtin_OES_EGL_image_external_types,
+ Elements(builtin_OES_EGL_image_external_types),
+ warn, skip_1d);
+}
+
+void
+glsl_type::generate_ARB_texture_cube_map_array_types(glsl_symbol_table *symtab,
+ bool warn)
+{
+ bool skip_1d = false;
+
+ add_types_to_symbol_table(symtab, builtin_ARB_texture_cube_map_array_types,
+ Elements(builtin_ARB_texture_cube_map_array_types),
+ warn, skip_1d);
+}
+
+void
+glsl_type::generate_ARB_texture_multisample_types(glsl_symbol_table *symtab,
+ bool warn)
+{
+ bool skip_1d = false;
+ add_types_to_symbol_table(symtab, builtin_ARB_texture_multisample_types,
+ Elements(builtin_ARB_texture_multisample_types),
+ warn, skip_1d);
+}
+
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);
- break;
- case 120:
- glsl_type::generate_120_types(state->symbols);
- break;
- case 130:
- glsl_type::generate_130_types(state->symbols);
- break;
- default:
- /* error */
- break;
+ if (state->es_shader) {
+ switch (state->language_version) {
+ case 100:
+ assert(state->es_shader);
+ glsl_type::generate_100ES_types(state->symbols);
+ break;
+ case 300:
+ glsl_type::generate_300ES_types(state->symbols);
+ break;
+ default:
+ assert(!"Unexpected language version");
+ break;
+ }
+ } else {
+ bool skip_1d = false;
+ switch (state->language_version) {
+ case 110:
+ glsl_type::generate_110_types(state->symbols, true, skip_1d);
+ break;
+ case 120:
+ glsl_type::generate_120_types(state->symbols, true, skip_1d);
+ break;
+ case 130:
+ glsl_type::generate_130_types(state->symbols, true, skip_1d);
+ break;
+ case 140:
+ glsl_type::generate_140_types(state->symbols);
+ break;
+ case 150:
+ glsl_type::generate_150_types(state->symbols);
+ break;
+ default:
+ assert(!"Unexpected language version");
+ break;
+ }
}
- if (state->ARB_texture_rectangle_enable) {
+ if (state->ARB_texture_rectangle_enable ||
+ state->is_version(140, 0)) {
glsl_type::generate_ARB_texture_rectangle_types(state->symbols,
state->ARB_texture_rectangle_warn);
}
- if (state->OES_texture_3D_enable && state->language_version == 100) {
+ if (state->OES_texture_3D_enable
+ && state->is_version(0, 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) {
+ if (state->EXT_texture_array_enable
+ && !state->is_version(130, 0)) {
// 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);
+ }
+
+ if (state->ARB_texture_cube_map_array_enable) {
+ glsl_type::generate_ARB_texture_cube_map_array_types(state->symbols,
+ state->ARB_texture_cube_map_array_warn);
+ }
+
+ if (state->ARB_texture_multisample_enable) {
+ glsl_type::generate_ARB_texture_multisample_types(state->symbols,
+ state->ARB_texture_multisample_warn);
+ }
}
}
+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;
+ case GLSL_TYPE_BOOL:
+ return bool_type;
+ default:
+ /* Handle everything else */
+ return type;
+ }
+}
+
+
void
_mesa_glsl_release_types(void)
{
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)
{
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;
}
return 0;
}
+const glsl_type *
+glsl_type::get_interface_instance(const glsl_struct_field *fields,
+ unsigned num_fields,
+ enum glsl_interface_packing packing,
+ const char *name)
+{
+ const glsl_type key(fields, num_fields, packing, 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, 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, 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++) {
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++) {
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++)
case GLSL_TYPE_ARRAY:
return this->length * this->fields.array->component_slots();
- default:
- return 0;
+ case GLSL_TYPE_SAMPLER:
+ case GLSL_TYPE_VOID:
+ case GLSL_TYPE_ERROR:
+ break;
}
+
+ return 0;
}
bool
&& 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;
+}
+
+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 = 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;
+}