public static BitmapSource OverlayInk(BitmapSource bitmapSource, double scale, StrokeCollection inkStrokes)
{
if (bitmapSource == null)
{
return((BitmapSource)null);
}
if (inkStrokes == null || inkStrokes.Count == 0)
{
return(bitmapSource);
}
Rect rect1 = new Rect(0.0, 0.0, (double)bitmapSource.PixelWidth, (double)bitmapSource.PixelHeight);
Vector offsetVector = (Vector)RectExtensions.GetCenter(rect1);
Rect rect2 = RectExtensions.Union(Enumerable.Select <Stroke, Rect>((IEnumerable <Stroke>)inkStrokes, (Func <Stroke, Rect>)(stroke => stroke.GetBounds())));
rect2.Scale(scale, scale);
rect2.Offset(offsetVector);
Rect rect3 = Rect.Union(rect1, rect2);
Canvas canvas1 = new Canvas();
canvas1.Width = rect3.Width;
canvas1.Height = rect3.Height;
canvas1.Children.Add((UIElement) new Image()
{
Source = (ImageSource)bitmapSource
});
UIElementCollection children = canvas1.Children;
InkPresenter inkPresenter1 = new InkPresenter();
inkPresenter1.Strokes = inkStrokes;
inkPresenter1.Margin = new Thickness(offsetVector.X, offsetVector.Y, -offsetVector.X, -offsetVector.Y);
inkPresenter1.LayoutTransform = (Transform) new ScaleTransform(scale, scale);
InkPresenter inkPresenter2 = inkPresenter1;
children.Add((UIElement)inkPresenter2);
Canvas canvas2 = canvas1;
Point newOrigin = new Point(-rect3.Left, -rect3.Top);
EnumerableExtensions.ForEach <UIElement>(Enumerable.OfType <UIElement>((IEnumerable)canvas2.Children), (Action <UIElement>)(child => DependencyObjectExtensions.SetCanvasPos((DependencyObject)child, newOrigin)));
return(new FrameworkElementCapturer((FrameworkElement)canvas2, ImageCapturer.MaxSize).Capture());
}