private void Init()
{
_compositor = Window.Current.Compositor;
_device = new Direct3D11Device();
_deviceContext = _device.ImmediateContext;
_multithread = _device.Multithread;
_multithread.IsMultithreadProtected = true;
_decoder = new ImageDecoder();
_compositionGraphicsDevice = CompositionGraphics.CreateCompositionGraphicsDevice(_compositor, _device);
_root = _compositor.CreateContainerVisual();
_root.RelativeSizeAdjustment = Vector2.One;
ElementCompositionPreview.SetElementChildVisual(this, _root);
_imageSurface = _compositionGraphicsDevice.CreateDrawingSurface(
new Size(1, 1),
DirectXPixelFormat.B8G8R8A8UIntNormalized,
DirectXAlphaMode.Premultiplied);
_imageBrush = _compositor.CreateSurfaceBrush(_imageSurface);
_imageBrush.HorizontalAlignmentRatio = 0;
_imageBrush.VerticalAlignmentRatio = 0;
_imageBrush.Stretch = CompositionStretch.None;
_imageBrush.BitmapInterpolationMode = CompositionBitmapInterpolationMode.NearestNeighbor;
_imageVisual = _compositor.CreateSpriteVisual();
_imageVisual.RelativeSizeAdjustment = Vector2.One;
_imageVisual.Brush = _imageBrush;
_root.Children.InsertAtTop(_imageVisual);
_captureBrush = _compositor.CreateSurfaceBrush();
_captureVisual = _compositor.CreateSpriteVisual();
_captureVisual.RelativeSizeAdjustment = Vector2.One;
_captureVisual.Brush = _captureBrush;
_root.Children.InsertAtBottom(_captureVisual);
_swapChain = new SwapChain(
_device,
DirectXPixelFormat.B8G8R8A8UIntNormalized,
2,
new SizeInt32()
{
Width = 1, Height = 1
});
var surface = _swapChain.CreateSurface(_compositor);
_captureBrush.Surface = surface;
}
