void opengl_bind_vertex_array(const vertex_layout& layout) {
auto iter = Stored_vertex_arrays.find(layout);
if (iter != Stored_vertex_arrays.end()) {
// Found existing vertex array!
GL_state.BindVertexArray(iter->second);
return;
}
GR_DEBUG_SCOPE("Create Vertex array");
GLuint vao;
glGenVertexArrays(1, &vao);
GL_state.BindVertexArray(vao);
for (size_t i = 0; i < layout.get_num_vertex_components(); ++i) {
auto component = layout.get_vertex_component(i);
auto& bind_info = GL_array_binding_data[component->format_type];
auto& attrib_info = GL_vertex_attrib_info[bind_info.attribute_id];
auto attribIndex = attrib_info.attribute_id;
glEnableVertexAttribArray(attribIndex);
glVertexAttribFormat(attribIndex,
bind_info.size,
bind_info.data_type,
bind_info.normalized,
static_cast<GLuint>(component->offset));
// Currently, all vertex data comes from one buffer.
glVertexAttribBinding(attribIndex, 0);
}
Stored_vertex_arrays.insert(std::make_pair(layout, vao));
}
