internal static Cairo.Color IncreaseLight (Cairo.Color color, double factor) { var c = color.ToXwtColor (); c.Light += (1 - c.Light) * factor; return c.ToCairoColor (); }
internal static Cairo.Color ReduceLight (Cairo.Color color, double factor) { var c = color.ToXwtColor (); c.Light *= factor; return c.ToCairoColor (); }