// Render the DirectX scene onto the D3DImage when WPF itself is ready to render
private void CompositionTarget_Rendering(object sender, EventArgs e)
{
if (D3DImage.IsFrontBufferAvailable)
{
D3DImage.Lock();
PlatformMethods.Render();
// Invalidate the whole area:
D3DImage.AddDirtyRect(new Int32Rect(0, 0, D3DImage.PixelWidth, D3DImage.PixelHeight));
D3DImage.Unlock();
}
}
private void d3dImage_IsFrontBufferAvailableChanged(object sender, DependencyPropertyChangedEventArgs e)
{
if (D3DImage.IsFrontBufferAvailable)
{
// (Re)initialization:
var surface = PlatformMethods.Initialize(new WindowInteropHelper(this).Handle,
(int)Width, (int)Height);
if (surface != IntPtr.Zero)
{
D3DImage.Lock();
D3DImage.SetBackBuffer(D3DResourceType.IDirect3DSurface9, surface);
D3DImage.Unlock();
CompositionTarget.Rendering += CompositionTarget_Rendering;
}
}
else
{
// Cleanup:
CompositionTarget.Rendering -= CompositionTarget_Rendering;
PlatformMethods.Cleanup();
}
}