private void OnLoaded(object sender, RoutedEventArgs e)
{
_compositor = Window.Current.Compositor;
_generator = _compositor.CreateCompositionGenerator();
_imageVisual = _compositor.CreateSpriteVisual();
_imageVisual.Size = new Vector2(RenderGrid.Width.ToSingle(), RenderGrid.Height.ToSingle());
_imageOptions = ImageSurfaceOptions.DefaultOptimized;
_imageOptions.SurfaceBackgroundColor = Colors.Black;
_imageSurface = _generator.CreateImageSurface(null, _imageVisual.Size.ToSize(), _imageOptions);
_imageVisual.Brush = _compositor.CreateSurfaceBrush(_imageSurface);
ElementCompositionPreview.SetElementChildVisual(RenderGrid, _imageVisual);
ImageCB.SelectedIndex = 0;
StretchCB.SelectedIndex = 0;
AlignXCB.SelectedIndex = 1;
AlignYCB.SelectedIndex = 1;
}
async void Redraw(bool recreateSurface = true)
{
if (_compositor == null)
{
_compositor = Window.Current.Compositor;
_generator = _compositor.CreateCompositionGenerator();
_defaultSize = new Vector2(GridWidth, GridWidth);
// Create the original output image visual
_originalImageVisual = _compositor.CreateSpriteVisual();
_originalImageVisual.Size = _defaultSize;
_imageSurface = await _generator.CreateImageSurfaceAsync(new Uri("ms-appx:///Assets/Images/cat.png"), _defaultSize.ToSize(), ImageSurfaceOptions.Default);
_originalImageVisual.Brush = _compositor.CreateSurfaceBrush(_imageSurface);
ElementCompositionPreview.SetElementChildVisual(OriginalOutputGrid, _originalImageVisual);
// Create the source image visual
_sourceImageVisual = _compositor.CreateSpriteVisual();
_sourceImageVisual.Size = _defaultSize;
ElementCompositionPreview.SetElementChildVisual(ImageGrid, _sourceImageVisual);
//Create the mask visual
_maskVisual = _compositor.CreateSpriteVisual();
_maskVisual.Size = _defaultSize;
ElementCompositionPreview.SetElementChildVisual(MaskGrid, _maskVisual);
// Create the output visual
_outputVisual = _compositor.CreateSpriteVisual();
_outputVisual.Size = _defaultSize;
ElementCompositionPreview.SetElementChildVisual(OutputGrid, _outputVisual);
}
var selIndex = ImageList.SelectedIndex;
if (selIndex == -1)
{
return;
}
var uri = _images.Values.ElementAt(selIndex);
if (uri == null)
{
return;
}
var offset = OffsetSlider.Value.ToSingle();
var padding = new Thickness(offset);
if (recreateSurface)
{
_sourceImageSurface =
await _generator.CreateImageSurfaceAsync(uri, _defaultSize.ToSize(), ImageSurfaceOptions.Default);
_imageMaskSurface = _generator.CreateImageMaskSurface(_sourceImageSurface, _defaultSize.ToSize(),
padding, ImageSurfaceOptions.GetDefaultImageMaskOptionsForBlur(_blurRadius));
}
else
{
_imageMaskSurface.Resize(_defaultSize.ToSize(), padding, ImageSurfaceOptions.GetDefaultImageMaskOptionsForBlur(_blurRadius));
}
_sourceImageVisual.Brush = _compositor.CreateSurfaceBrush(_sourceImageSurface);
_maskVisual.Brush = _compositor.CreateSurfaceBrush(_imageMaskSurface);
var maskedBrush = _compositor.CreateMaskBrush();
maskedBrush.Source = _originalImageVisual.Brush;
maskedBrush.Mask = _compositor.CreateSurfaceBrush(_imageMaskSurface);
_outputVisual.Brush = maskedBrush;
}
private void OnBlurRadiusChanged(object sender, RangeBaseValueChangedEventArgs e)
{
_blurRadius = BlurSlider.Value.ToSingle();
_imageMaskSurface?.Redraw(ImageSurfaceOptions.GetDefaultImageMaskOptionsForBlur(_blurRadius));
}
/// <summary>
/// Disposes the resources
/// </summary>
public void Dispose()
{
// Clean up resources
_compositor = null;
Source = null;
DataContext = null;
Foreground = null;
Background = null;
_scheduledObject = null;
_currentObject = null;
// Clean up Composition Objects
_imageSurface?.Dispose();
_imageSurface = null;
_nextImageSurface?.Dispose();
_nextImageSurface = null;
_frameLayerMask?.Dispose();
_frameLayerMask = null;
_placeholderContentMask?.Dispose();
_placeholderContentMask = null;
_placeholderContentBrush?.Dispose();
_placeholderContentBrush = null;
_nextSurfaceBrush?.Dispose();
_nextSurfaceBrush = null;
_rootContainer?.Dispose();
_rootContainer = null;
_shadowVisual?.Dispose();
_shadowVisual = null;
_frameLayer?.Dispose();
_frameLayer = null;
_frameBackgroundVisual?.Dispose();
_frameBackgroundVisual = null;
_placeholderBackgroundVisual?.Dispose();
_placeholderBackgroundVisual = null;
_placeholderContentVisual?.Dispose();
_placeholderContentVisual = null;
_frameContentVisual?.Dispose();
_frameContentVisual = null;
_nextVisualContent?.Dispose();
_nextVisualContent = null;
_shadow?.Dispose();
_shadow = null;
_layerEffectBrush?.Dispose();
_layerEffectBrush = null;
_imageOptions = null;
_zoomInAnimationGroup?.Dispose();
_zoomInAnimationGroup = null;
_fadeOutAnimation?.Dispose();
_fadeOutAnimation = null;
_fadeInAnimation?.Dispose();
_fadeInAnimation = null;
_colorAnimation?.Dispose();
_colorAnimation = null;
_alignXAnimation?.Dispose();
_alignXAnimation = null;
_alignYAnimation?.Dispose();
_alignYAnimation = null;
_offsetAnimation?.Dispose();
_offsetAnimation = null;
_scaleAnimation?.Dispose();
_scaleAnimation = null;
// Dispose the generator at the end to allow the
// dependant composition objects to unsubscribe from
// generator events
_generator?.Dispose();
_generator = null;
}
/// <summary>
/// Ctor
/// </summary>
public ImageFrame()
{
// Set the default Style Key
DefaultStyleKey = typeof(ImageFrame);
// Setting the background to transparent so that it will
// receive Pointer events
Background = new SolidColorBrush(Colors.Transparent);
// Initialize the ImageOptions
_imageOptions = ImageSurfaceOptions.Default;
}
