/// <summary>
/// Creates an instance of the ColorBloomTransitionHelper.
/// Any visuals to be later created and animated will be hosted within the specified UIElement.
/// </summary>
public ColorBloomTransitionHelper(UIElement hostForVisual)
{
this.hostForVisual = hostForVisual;
// we have an element in the XAML tree that will host our Visuals
var visual = ElementCompositionPreview.GetElementVisual(hostForVisual);
_compositor = visual.Compositor;
// create a container
// adding children to this container adds them to the live visual tree
_containerForVisuals = _compositor.CreateContainerVisual();
ElementCompositionPreview.SetElementChildVisual(hostForVisual, _containerForVisuals);
_canvasDevice = new CanvasDevice();
_graphicsDevice = CanvasComposition.CreateCompositionGraphicsDevice(_compositor, _canvasDevice);
// Create the circle mask
_circleMaskSurface = LoadCircle(200, Colors.White);
}
public ManagedSurface LoadCircle(float radius, Color color)
{
ManagedSurface surface = new ManagedSurface(CreateSurface(new Size(radius * 2, radius * 2)));
var ignored = surface.Draw(_graphicsDevice, _drawingLock, new CircleDrawer(radius, color));
return(surface);
}
public ManagedSurface LoadCircle(float radius, Color color)
{
_graphicsDevice = CanvasComposition.CreateCompositionGraphicsDevice(_compositor, _canvasDevice);
ManagedSurface surface = new ManagedSurface(CreateSurface(new Size(radius * 2, radius * 2)));
var ignored = surface.Draw(_graphicsDevice, _drawingLock, new CircleDrawer(radius, color));
return(surface);
}
