/// <summary>
/// Initialize screen capture in the window
/// </summary>
private void InitScreenCaptureComposition()
{
// Maximal size of the scrreen capture surface
mScreenCaptureMaxSize = new Vector2(
System.Windows.Forms.Screen.FromHandle(mWindowHandle).Bounds.Width / 2f,
System.Windows.Forms.Screen.FromHandle(mWindowHandle).Bounds.Height / 2f
);
// Create the compositor.
mCaptureCompositor = new Compositor();
// Create a target for the window.
mCaptureCompositionTarget = mCaptureCompositor.CreateDesktopWindowTarget(mWindowHandle, false);
// Attach the root visual.
mCaptureCompositionRootContainer = mCaptureCompositor.CreateContainerVisual();
mCaptureCompositionRootContainer.RelativeSizeAdjustment = Vector2.Zero;
mCaptureCompositionRootContainer.RelativeOffsetAdjustment = Vector3.Zero;
mCaptureCompositionRootContainer.Size = mScreenCaptureMaxSize;
UpdateCaptureCompositionOffset(mOverlayData.ScreenCaptureOverlay.PosX, mOverlayData.ScreenCaptureOverlay.PosY);
UpdateCaptureCompositionScale(mOverlayData.ScreenCaptureOverlay.Scale);
UpdateCaptureCompositionOpacity(mOverlayData.ScreenCaptureOverlay.Opacity);
mCaptureCompositionRootContainer.AnchorPoint = new Vector2(0, 0);
mCaptureCompositionTarget.Root = mCaptureCompositionRootContainer;
// Setup the rest of the sample application.
mCaptureHandler = new OverlayScreenCaptureCaptureHandler(mCaptureCompositor);
mCaptureCompositionRootContainer.Children.InsertAtTop(mCaptureHandler.Visual);
}
void InitializeContainerVisual(Wd.ContainerVisual source, Wc.ContainerVisual target)
{
var children = target.Children;
foreach (var child in source.Children)
{
children.InsertAtTop(GetVisual(child));
}
}
private void CompositionHostControl_Loaded(object sender, RoutedEventArgs e)
{
// If the user changes the DPI scale setting for the screen the app is on,
// the CompositionHostControl is reloaded. Don't redo this set up if it's
// already been done.
if (compositionHost is null)
{
currentDpi = VisualTreeHelper.GetDpi(this);
compositionHost = new CompositionHost(CompositionHostElement.ActualHeight, CompositionHostElement.ActualWidth);
CompositionHostElement.Child = compositionHost;
compositor = compositionHost.Compositor;
containerVisual = compositor.CreateContainerVisual();
compositionHost.Child = containerVisual;
}
}
public BarGraphHostControl()
{
InitializeComponent();
Loaded += BarGraphHostControl_Loaded;
DataContextChanged += BarGraphHostControl_DataContextChanged;
var currentDpi = VisualTreeHelper.GetDpi(this);
_currentDpiX = currentDpi.PixelsPerInchX;
_currentDpiY = currentDpi.PixelsPerInchY;
_compositionHost = new CompositionHost();
CompositionHostElement.Child = _compositionHost;
_compositionHost.RegisterForDispose(this);
_compositor = _compositionHost.Compositor;
_graphContainer = _compositor.CreateContainerVisual();
}
private void BarGraphHostControl_Loaded(object sender, RoutedEventArgs e)
{
// If the user changes the DPI scale setting for the screen the app is on,
// the CompositionHostControl is reloaded. Don't redo this set up if it's
// already been done.
if (compositionHost is null)
{
var currentDpi = VisualTreeHelper.GetDpi(this);
currentDpiX = currentDpi.PixelsPerInchX;
currentDpiY = currentDpi.PixelsPerInchY;
currentDpi = VisualTreeHelper.GetDpi(this);
compositionHost = new CompositionHost(CompositionHostElement.ActualWidth, CompositionHostElement.ActualHeight, currentDpiX, currentDpiY);
CompositionHostElement.Child = compositionHost;
compositor = compositionHost.Compositor;
graphContainer = compositor.CreateContainerVisual();
compositionHost.Child = graphContainer;
compositionHost.MouseMoved += HostControl_MouseMoved;
compositionHost.InvalidateDrawing += CompositionHost_InvalidateDrawing;
// Create properties for render target
var factory2D = new SharpDX.Direct2D1.Factory();
var width = (float)CompositionHostElement.ActualWidth;
var height = (float)CompositionHostElement.ActualHeight;
var properties = new HwndRenderTargetProperties();
properties.Hwnd = compositionHost.hwndHost;
properties.PixelSize = new SharpDX.Size2((int)(width * currentDpiX / 96.0), (int)(width * currentDpiY / 96.0));
properties.PresentOptions = PresentOptions.None;
// Create render target
windowRenderTarget = new WindowRenderTarget(factory2D, new RenderTargetProperties(new SharpDX.Direct2D1.PixelFormat(Format.Unknown, SharpDX.Direct2D1.AlphaMode.Premultiplied)), properties);
windowRenderTarget.DotsPerInch = new Size2F((float)currentDpiX, (float)currentDpiY);
windowRenderTarget.Resize(new Size2((int)(width * currentDpiX / 96.0), (int)(width * currentDpiY / 96.0)));
}
}
