cairo/translations.go
func (v *Context) UserToDeviceDistance(dx, dy float64) (float64, float64) {
	C.cairo_user_to_device_distance(v.native(), (*C.double)(&dx), (*C.double)(&dy))
	return dx, dy
}
func (v *Context) UserToDeviceDistance(dx, dy float64) (float64, float64) {
	C.cairo_user_to_device_distance(v.native(), (*C.double)(&dx), (*C.double)(&dy))
	return dx, dy
}
// UserToDeviceDistance is a wrapper around cairo_user_to_device_distance.