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;
}
private async void ImageButton_Click(object sender, RoutedEventArgs e)
{
_imageBrush.Surface = null;
var file = await PickImageAsync();
if (file != null)
{
using (var stream = await file.OpenReadAsync())
using (var d3dSurface = _decoder.DecodeStreamIntoTexture(_device, stream))
{
CompositionGraphics.CopyDirect3DSurfaceIntoCompositionSurface(_device, d3dSurface, _imageSurface);
}
_imageBrush.Surface = _imageSurface;
}
}
private async void ImageButton2_Click(object sender, RoutedEventArgs e)
{
_imageBrush.Surface = null;
var file = await PickImageAsync();
if (file != null)
{
using (var stream = await file.OpenReadAsync())
{
var decoder = await BitmapDecoder.CreateAsync(stream);
var frame = await decoder.GetFrameAsync(0);
var width = frame.PixelWidth;
var height = frame.PixelHeight;
Debug.Assert(frame.BitmapPixelFormat == BitmapPixelFormat.Bgra8);
var pixelData = await frame.GetPixelDataAsync();
var bits = pixelData.DetachPixelData();
var description = new Direct3D11Texture2DDescription();
description.Base = new Direct3DSurfaceDescription();
description.Base.Format = DirectXPixelFormat.B8G8R8A8UIntNormalized;
description.Base.Width = (int)width;
description.Base.Height = (int)height;
description.Base.MultisampleDescription = new Direct3DMultisampleDescription();
description.Base.MultisampleDescription.Count = 1;
description.Base.MultisampleDescription.Quality = 0;
description.ArraySize = 1;
description.BindFlags = 0;
description.CpuAccessFlags = 0;
description.MiscFlags = 0;
description.MipLevels = 1;
var texture = _device.CreateTexture2D(description, bits);
CompositionGraphics.CopyDirect3DSurfaceIntoCompositionSurface(_device, texture, _imageSurface);
}
_imageBrush.Surface = _imageSurface;
}
}
