rb_scan_args (argc, argv, "06", &disp, &parent,
&geom[0], &geom[1], &geom[2], &geom[3]);
if (!NIL_P (disp)) {
Check_Type (disp, T_STRING);
rb_scan_args (argc, argv, "06", &disp, &parent,
&geom[0], &geom[1], &geom[2], &geom[3]);
if (!NIL_P (disp)) {
Check_Type (disp, T_STRING);