private void Setup()
{
if (!_firstRun)
{
return;
}
_firstRun = false;
var shadowContainer = ElementCompositionPreview.GetElementVisual(ImageContainer);
var compositor = shadowContainer.Compositor;
var image = ImageContainer.FindChildren <CompositionImage>().First();
var imageVisual = image.SpriteVisual;
var imageLoader = ImageLoaderFactory.CreateImageLoader(compositor);
var imageMaskSurface = imageLoader.CreateManagedSurfaceFromUri(new Uri("ms-appx:///Helpers/Composition/CircleMask.png"));
var mask = compositor.CreateSurfaceBrush();
mask.Surface = imageMaskSurface.Surface;
var source = image.SurfaceBrush as CompositionSurfaceBrush;
var maskBrush = compositor.CreateMaskBrush();
maskBrush.Mask = mask;
maskBrush.Source = source;
image.Brush = maskBrush;
Shadow.Mask = maskBrush.Mask;
this.Fade(value: 1, delay: 1000).StartAsync();
}