private void ButtonStart_Click(object sender, RoutedEventArgs e)
{
txtResult.Text = "";
btnStop.IsEnabled = true;
btnStart.IsEnabled = false;
_controller = DispatcherQueueController.CreateOnDedicatedThread();
_controller.DispatcherQueue.TryEnqueue(() =>
{
var primeNumbers = new List <int>();
for (int i = 1; i <= 100000; i++)
{
var count = 0;
for (int j = 2; j < i; j++)
{
if ((i % j) == 0)
{
count++;
}
}
if (count == 0)
{
primeNumbers.Add(i);
}
UpdateProgressBar(i / 1000);
}
UpateTextBlock(primeNumbers);
});
}
public static DispatcherQueueController CreateDispatcherQueueControllerForCurrentThread()
{
var options = new DispatcherQueueOptions
{
dwSize = Marshal.SizeOf <DispatcherQueueOptions>(),
threadType = DISPATCHERQUEUE_THREAD_TYPE.DQTYPE_THREAD_CURRENT,
apartmentType = DISPATCHERQUEUE_THREAD_APARTMENTTYPE.DQTAT_COM_NONE
};
DispatcherQueueController controller = null;
uint hr = CreateDispatcherQueueController(options, out IntPtr controllerPointer);
if (hr == 0)
{
controller = Marshal.GetObjectForIUnknown(controllerPointer) as DispatcherQueueController;
Marshal.Release(controllerPointer);
}
return(controller);
}
public Capture(CanvasDevice device, GraphicsCaptureItem item)
{
_item = item;
_device = device;
// TODO: Dpi?
_swapChain = new CanvasSwapChain(_device, item.Size.Width, item.Size.Height, 96);
_dispatcherQueueController = DispatcherQueueController.CreateOnDedicatedThread();
_dispatcherQueue = _dispatcherQueueController.DispatcherQueue;
// We don't want to return from the constructor untill the frame pool and
// the capture session are both initialized. We could do this on the UI thread,
// but you really shouldn't. This will update as fast as the screen refresh rate,
// so it would cause performance issues on the UI thread.
var wait = new AutoResetEvent(false);
var success = _dispatcherQueue.TryEnqueue(() =>
{
_framePool = Direct3D11CaptureFramePool.Create(
_device,
DirectXPixelFormat.B8G8R8A8UIntNormalized,
2,
item.Size);
_session = _framePool.CreateCaptureSession(item);
_lastSize = item.Size;
_framePool.FrameArrived += OnFrameArrived;
wait.Set();
});
if (!success)
{
throw new Exception("Could not enqueue work!");
}
wait.WaitOne();
}
