internal static extern void cairo_curve_to(IntPtr cr, double x1, double y1, double x2, double y2, double x3, double y3);
public void CurveTo(double x1, double y1, double x2, double y2, double x3, double y3) { NativeMethods.cairo_curve_to(state, x1, y1, x2, y2, x3, y3); }