Cairo.Region.Dispose C# (CSharp) Метод

        public void Dispose()
        {
            Dispose (true);
            GC.SuppressFinalize (this);
        }

        protected void GenerateMask()
        {
            if (MaskMap != null)
            {
                MaskMap.Dispose();
            }

            using (var maskImage = new ImageSurface(Format.Argb32, Image.Width, Image.Height))
            {
                using (var cr = new Context(maskImage))
                {
                    cr.SetSourceRGB(0, 0, 0);
                    cr.Operator = Operator.Clear;
                    cr.Paint();
                    cr.Operator = Operator.Source;

                    cr.SetSource(Image, 0, 0);
                    cr.Rectangle(new Cairo.Rectangle(0, 0, Image.Width, Image.Height));
                    cr.Paint();
                }
                MaskMap = Gdk.CairoHelper.RegionCreateFromSurface(maskImage);
            }
        }