private void InitializeCompositor()
{
compositor = ElementCompositionPreview.GetElementVisual(this).Compositor;
InitializeEffects();
MainImage.Source = item.ImageSource;
MainImage.InvalidateArrange();
var destinationBrush = compositor.CreateBackdropBrush();
var graphicsEffectFactory = compositor.CreateEffectFactory(graphicsEffect, new[] {
"SaturationEffect.Saturation", "ExposureEffect.Exposure", "Blur.BlurAmount",
"TemperatureAndTintEffect.Temperature", "TemperatureAndTintEffect.Tint",
"ContrastEffect.Contrast"
});
combinedBrush = graphicsEffectFactory.CreateBrush();
combinedBrush.SetSourceParameter("Backdrop", destinationBrush);
var effectSprite = compositor.CreateSpriteVisual();
effectSprite.Size = new Vector2((float)item.ImageSource.PixelWidth, (float)item.ImageSource.PixelHeight);
effectSprite.Brush = combinedBrush;
ElementCompositionPreview.SetElementChildVisual(MainImage, effectSprite);
editingInitialized = true;
}