static RequireExtension _ext("GL_EXT_framebuffer_object");
glGenRenderbuffersEXT(1, &id);
static RequireExtension _ext("GL_EXT_framebuffer_object");
glGenRenderbuffersEXT(1, &id);
width = w;
height = h;
glRenderbufferStorageEXT(GL_RENDERBUFFER_EXT, fmt, width, height);
width = w;
height = h;
glRenderbufferStorageEXT(GL_RENDERBUFFER_EXT, fmt, width, height);