public void EnqueueFreeDisplayList(GpuDisplayList GpuDisplayList)
{
//Console.WriteLine("EnqueueFreeDisplayList: {0}", this.DisplayListFreeQueue.Count);
lock (DisplayListFreeQueue)
{
this.DisplayListFreeQueue.Enqueue(GpuDisplayList);
GpuDisplayList.SetFree();
}
DisplayListFreeEvent.Set();
}