private void UpdateScene()
{
if (RenderImage.IsFrontBufferAvailable)
{
int w = System.Convert.ToInt32(RenderTarget.ActualWidth);
int h = System.Convert.ToInt32(RenderTarget.ActualHeight);
if (w == 0 || h == 0)
{
return;
}
RenderImage.Lock();
if (RenderImage.PixelWidth != w || RenderImage.PixelHeight != h)
{
RenderImage.SetBackBuffer(D3DResourceType.IDirect3DSurface9, IntPtr.Zero);
Rush.RushResize(w, h);
RenderSurface = Rush.RushGetBackBuffer();
RenderImage.SetBackBuffer(D3DResourceType.IDirect3DSurface9, RenderSurface);
}
Rush.RushUpdate();
if (RenderSurface != IntPtr.Zero)
{
Int32Rect rect = new Int32Rect(0, 0, w, h);
RenderImage.AddDirtyRect(rect);
}
RenderImage.Unlock();
}
}
private void BeginRenderingScene()
{
RenderSurface = Rush.RushGetBackBuffer();
if (RenderImage.IsFrontBufferAvailable && RenderSurface != IntPtr.Zero)
{
// set the back buffer using the new scene pointer
RenderImage.Lock();
RenderImage.SetBackBuffer(D3DResourceType.IDirect3DSurface9, RenderSurface);
RenderImage.Unlock();
// leverage the Rendering event of WPF's composition target to
// update the custom D3D scene
CompositionTarget.Rendering += OnRendering;
}
}