private void DrawingSurface_Loaded(object sender, RoutedEventArgs e) { if (m_d3dInterop == null) { m_d3dInterop = new Direct3DInterop(); // Set window bounds in dips m_d3dInterop.WindowBounds = new Windows.Foundation.Size( (float)DrawingSurface.ActualWidth, (float)DrawingSurface.ActualHeight ); // Set native resolution in pixels m_d3dInterop.NativeResolution = new Windows.Foundation.Size( (float)Math.Floor(DrawingSurface.ActualWidth * Application.Current.Host.Content.ScaleFactor / 100.0f + 0.5f), (float)Math.Floor(DrawingSurface.ActualHeight * Application.Current.Host.Content.ScaleFactor / 100.0f + 0.5f) ); // Set render resolution to the full native resolution m_d3dInterop.RenderResolution = m_d3dInterop.NativeResolution; // Hook-up native component to DrawingSurface DrawingSurface.SetContentProvider(m_d3dInterop.CreateContentProvider()); DrawingSurface.SetManipulationHandler(m_d3dInterop); m_d3dInterop.SetDelegate(Sum); m_d3dInterop.SetDialogDelegate(Show); } }