public static async Task <AttachedStaticCompositionEffect <T> > AttachCompositionInAppCustomAcrylicEffectAsync <TSource, T>(
[NotNull] this TSource element, [NotNull] T target, float blur, int ms, Color color, float colorMix, float?saturation,
[CanBeNull] CanvasControl canvas, [NotNull] Uri uri, int timeThreshold = 1000, bool reload = false, bool fadeIn = false, bool disposeOnUnload = false)
where TSource : FrameworkElement
where T : FrameworkElement
{
// Percentage check
if (saturation < 0 || saturation > 1)
{
throw new ArgumentOutOfRangeException("The input saturation value must be in the [0,1] range");
}
if (colorMix <= 0 || colorMix >= 1)
{
throw new ArgumentOutOfRangeException("The mix factors must be in the [0,1] range");
}
if (timeThreshold <= 0)
{
throw new ArgumentOutOfRangeException("The time threshold must be a positive number");
}
// Setup the compositor
Visual visual = ElementCompositionPreview.GetElementVisual(element);
Compositor compositor = visual.Compositor;
// Prepare a luminosity to alpha effect to adjust the background contrast
CompositionBackdropBrush backdropBrush = compositor.CreateBackdropBrush();
const String
blurName = "Blur",
blurParameterName = "Blur.BlurAmount";
GaussianBlurEffect blurEffect = new GaussianBlurEffect
{
Name = blurName,
BlurAmount = 0f,
BorderMode = EffectBorderMode.Hard,
Optimization = EffectOptimization.Balanced,
Source = new CompositionEffectSourceParameter(nameof(backdropBrush))
};
// Background with blur and tint overlay
IDictionary <String, CompositionBrush> sourceParameters = new Dictionary <String, CompositionBrush>
{
{ nameof(backdropBrush), backdropBrush }
};
// Get the noise brush using Win2D
IGraphicsEffect source = await AcrylicEffectHelper.ConcatenateEffectWithTintAndBorderAsync(compositor,
blurEffect, sourceParameters, color, colorMix, canvas, uri, timeThreshold, reload);
// Add the final saturation effect if needed
if (saturation != null)
{
SaturationEffect saturationEffect = new SaturationEffect
{
Saturation = saturation.Value,
Source = source
};
source = saturationEffect;
}
// Make sure the Win2D brush was loaded correctly
CompositionEffectFactory factory = compositor.CreateEffectFactory(source, new[] { blurParameterName });
// Create the effect factory and apply the final effect
CompositionEffectBrush effectBrush = factory.CreateBrush();
foreach (KeyValuePair <String, CompositionBrush> pair in sourceParameters)
{
effectBrush.SetSourceParameter(pair.Key, pair.Value);
}
// Create the sprite to display and add it to the visual tree
SpriteVisual sprite = compositor.CreateSpriteVisual();
sprite.Brush = effectBrush;
// Assign the visual
if (fadeIn)
{
sprite.StopAnimation("Opacity");
sprite.Opacity = 0;
}
await AddToTreeAndBindSizeAsync(target.GetVisual(), target, sprite);
if (fadeIn)
{
// Fade the effect in
ScalarKeyFrameAnimation opacityAnimation = sprite.Compositor.CreateScalarKeyFrameAnimation(1, 0,
TimeSpan.FromMilliseconds(ms), null, sprite.GetEasingFunction(EasingFunctionNames.Linear));
sprite.StartAnimation("Opacity", opacityAnimation);
}
// Animate the blur and return the result
effectBrush.StartAnimationAsync(blurParameterName, blur, TimeSpan.FromMilliseconds(ms)).Forget();
return(new AttachedStaticCompositionEffect <T>(target, sprite, disposeOnUnload));
}