diff options
| -rw-r--r-- | src/glsl/lower_ubo_reference.cpp | 89 |
1 files changed, 86 insertions, 3 deletions
diff --git a/src/glsl/lower_ubo_reference.cpp b/src/glsl/lower_ubo_reference.cpp index 8d13ec18192..026197df7a9 100644 --- a/src/glsl/lower_ubo_reference.cpp +++ b/src/glsl/lower_ubo_reference.cpp @@ -61,6 +61,60 @@ public: bool progress; }; +/** + * Determine the name of the interface block field + * + * This is the name of the specific member as it would appear in the + * \c gl_uniform_buffer_variable::Name field in the shader's + * \c UniformBlocks array. + */ +static const char * +interface_field_name(void *mem_ctx, char *base_name, ir_dereference *d) +{ + ir_constant *previous_index = NULL; + + while (d != NULL) { + switch (d->ir_type) { + case ir_type_dereference_variable: { + ir_dereference_variable *v = (ir_dereference_variable *) d; + if (previous_index + && v->var->is_interface_instance() + && v->var->type->is_array()) + return ralloc_asprintf(mem_ctx, + "%s[%d]", + base_name, + previous_index->get_uint_component(0)); + else + return base_name; + + break; + } + + case ir_type_dereference_record: { + ir_dereference_record *r = (ir_dereference_record *) d; + + d = r->record->as_dereference(); + break; + } + + case ir_type_dereference_array: { + ir_dereference_array *a = (ir_dereference_array *) d; + + d = a->array->as_dereference(); + previous_index = a->array_index->as_constant(); + break; + } + + default: + assert(!"Should not get here."); + break; + } + } + + assert(!"Should not get here."); + return NULL; +} + void lower_ubo_reference_visitor::handle_rvalue(ir_rvalue **rvalue) { @@ -76,9 +130,26 @@ lower_ubo_reference_visitor::handle_rvalue(ir_rvalue **rvalue) return; mem_ctx = ralloc_parent(*rvalue); - uniform_block = var->uniform_block; - struct gl_uniform_block *block = &shader->UniformBlocks[uniform_block]; - this->ubo_var = &block->Uniforms[var->location]; + + const char *const field_name = + interface_field_name(mem_ctx, (char *) var->interface_type->name, deref); + + this->uniform_block = -1; + for (unsigned i = 0; i < shader->NumUniformBlocks; i++) { + if (strcmp(field_name, shader->UniformBlocks[i].Name) == 0) { + this->uniform_block = i; + + struct gl_uniform_block *block = &shader->UniformBlocks[i]; + + this->ubo_var = var->is_interface_instance() + ? &block->Uniforms[0] : &block->Uniforms[var->location]; + + break; + } + } + + assert(this->uniform_block != (unsigned) -1); + ir_rvalue *offset = new(mem_ctx) ir_constant(0u); unsigned const_offset = 0; bool row_major = ubo_var->RowMajor; @@ -105,6 +176,18 @@ lower_ubo_reference_visitor::handle_rvalue(ir_rvalue **rvalue) * vector) is handled below in emit_ubo_loads. */ array_stride = 4; + } else if (deref_array->type->is_interface()) { + /* We're processing an array dereference of an interface instance + * array. The thing being dereferenced *must* be a variable + * dereference because intefaces cannot be embedded an other + * types. In terms of calculating the offsets for the lowering + * pass, we don't care about the array index. All elements of an + * interface instance array will have the same offsets relative to + * the base of the block that backs them. + */ + assert(deref_array->array->as_dereference_variable()); + deref = deref_array->array->as_dereference(); + break; } else { array_stride = deref_array->type->std140_size(row_major); array_stride = glsl_align(array_stride, 16); |