private void Uninitialize()
{
if (_cameraPreviewImageSource != null)
{
_cameraPreviewImageSource.Dispose();
_cameraPreviewImageSource = null;
}
if (_blendEffect != null)
{
_blendEffect.Dispose();
_blendEffect = null;
}
if (_blendImageProvider != null)
{
_blendImageProvider = null;
}
}
private void BackgroundImage_ImageOpened(object sender, RoutedEventArgs e)
{
var gfxEffect = new BlendEffect
{
Mode = BlendEffectMode.Multiply,
Background = new ColorSourceEffect
{
Name = "Darken",
Color = Color.FromArgb(102, 0, 0, 0),
},
Foreground = new GaussianBlurEffect()
{
Name = "Blur",
BlurAmount = 20.0f,
BorderMode = EffectBorderMode.Hard,
Optimization = EffectOptimization.Speed,
Source = new CompositionEffectSourceParameter("ImageSource")
}
};
Visual _backgroundVisual = ElementCompositionPreview.GetElementVisual(BackgroundGrid);
Compositor _backgroundCompositor = _backgroundVisual.Compositor;
var effectBrush = _backgroundCompositor.CreateEffectFactory(gfxEffect).CreateBrush();
var destinationBrush = _backgroundCompositor.CreateBackdropBrush();
effectBrush.SetSourceParameter("ImageSource", destinationBrush);
//Generate a UIElement visual.
var blurSprite = _backgroundCompositor.CreateSpriteVisual();
blurSprite.Size = new Vector2((float)BackgroundGrid.ActualWidth, (float)BackgroundGrid.ActualHeight);
blurSprite.Brush = effectBrush;
//Then "inject" it to the XAML.
ElementCompositionPreview.SetElementChildVisual(BackgroundGrid, blurSprite);
//create animation for opacity of the image from 0 -> 1
DoubleAnimation animation = new DoubleAnimation()
{
From = 0,
To = 1,
EasingFunction = new CircleEase()
{
EasingMode = EasingMode.EaseOut
},
Duration = new Duration(TimeSpan.FromSeconds(0.3))
};
animation.EnableDependentAnimation = true;
//create storyboard.
Storyboard loadImageOpacity = new Storyboard();
loadImageOpacity.Children.Add(animation);
//start the storyboard
Storyboard.SetTarget(animation, BackgroundImage);
Storyboard.SetTargetProperty(animation, "Opacity");
loadImageOpacity.Begin();
gfxEffect.Dispose();
}
protected override async void Render()
{
try
{
if (Source != null)
{
Debug.WriteLine(DebugTag + Name + ": Rendering...");
foreach (var change in Changes)
{
change();
}
Changes.Clear();
//blend source layer with mode overlay
var blendEffect = new BlendEffect();
blendEffect.Source = Source;// new StreamImageSource(new MemoryStream());
blendEffect.ForegroundSource = Source;
blendEffect.BlendFunction = BlendFunction.Overlay;
blendEffect.GlobalAlpha = 0.0;
var renderer = new JpegRenderer(blendEffect);
var outBuffer = await renderer.RenderAsync();
blendEffect.Dispose();
var highPassSource = new BufferImageSource(outBuffer);
var highPassFilter = new HighpassEffect(6, false, 1);
highPassFilter.Source = highPassSource;
var highPassRenderer = new JpegRenderer(highPassFilter);
var highPassOutBuffer = await highPassRenderer.RenderAsync();
highPassFilter.Dispose();
var negativeFilter = new NegativeFilter();
var filterEffect = new FilterEffect();
filterEffect.Filters = new List<IFilter>() { negativeFilter };
filterEffect.Source = new BufferImageSource(highPassOutBuffer);
var invertRenderer = new JpegRenderer(filterEffect);
var invertOutBuffer = await invertRenderer.RenderAsync();
blendEffect = new BlendEffect(Source, new BufferImageSource(invertOutBuffer), BlendFunction.Overlay, 0.5);
using (var bmpRender = new WriteableBitmapRenderer(blendEffect, TmpBitmap))
{
await bmpRender.RenderAsync();
}
TmpBitmap.Pixels.CopyTo(PreviewBitmap.Pixels, 0);
PreviewBitmap.Invalidate(); // Force a redraw
}
else
{
Debug.WriteLine(DebugTag + Name + ": Render(): No buffer set!");
}
}
catch (Exception e)
{
Debug.WriteLine(DebugTag + Name + ": Render(): " + e.Message);
}
finally
{
switch (State)
{
case States.Apply:
State = States.Wait;
break;
case States.Schedule:
State = States.Apply;
Render();
break;
default:
break;
}
}
}