BOOL ellipse_degnerated(const DC *dc, double width, double height)
{
    const XFORM *xform = &dc->xformVport2World;
    double wsq = (width / 2) * (width / 2);
    double hsq = (height / 2) * (height / 2);
    const double a = (hsq * xform->eM11 * xform->eM11) + (wsq * xform->eM12 * xform->eM12);
    const double d = (hsq * wsq);

    return sqrt(d / a) == 0;
}