pub unsafe extern "C" fn cairo_pattern_get_rgba(
pattern: *mut cairo_pattern_t,
red: *mut c_double,
green: *mut c_double,
blue: *mut c_double,
alpha: *mut c_double,
) -> cairo_status_t
pub unsafe extern "C" fn cairo_pattern_get_rgba(
pattern: *mut cairo_pattern_t,
red: *mut c_double,
green: *mut c_double,
blue: *mut c_double,
alpha: *mut c_double,
) -> cairo_status_t