GraphicEditor.Model.ToolBehavior.GraphicContent.ConvertToRasterImage C# (CSharp) Method

        public BitmapImage ConvertToRasterImage(UIElement source, double scale, int quality)
        {
            double actualHeight = source.RenderSize.Height;
            double actualWidth = source.RenderSize.Width;

            if (actualHeight == 0 || actualWidth == 0)
                return null;

            double renderHeight = actualHeight * scale;
            double renderWidth = actualWidth * scale;

            RenderTargetBitmap renderTarget = new RenderTargetBitmap((int)renderWidth, (int)renderHeight, 96, 96, PixelFormats.Pbgra32);
            VisualBrush sourceBrush = new VisualBrush(source);

            DrawingVisual drawingVisual = new DrawingVisual();
            DrawingContext drawingContext = drawingVisual.RenderOpen();

            using (drawingContext)
            {
                drawingContext.PushTransform(new ScaleTransform(scale, scale));
                drawingContext.DrawRectangle(sourceBrush, null, new Rect(new Point(0, 0), new Point(actualWidth, actualHeight)));
            }
            renderTarget.Render(drawingVisual);

            PngBitmapEncoder pngBitmapEncoder = new PngBitmapEncoder();
            pngBitmapEncoder.Frames.Add(BitmapFrame.Create(renderTarget));

            BitmapImage bitmapImage = new BitmapImage();

            using (var stream = new MemoryStream())
            {
                pngBitmapEncoder.Save(stream);
                stream.Seek(0, SeekOrigin.Begin);

                bitmapImage.BeginInit();
                bitmapImage.CacheOption = BitmapCacheOption.OnLoad;
                bitmapImage.StreamSource = stream;
                bitmapImage.EndInit();
            }

            return bitmapImage;
        }