private void Uninitialize()
{
StatusTextBlock.Text = "";
if (_mediaElement != null)
{
_mediaElement.Source = null;
_mediaElement = null;
}
if (_cameraStreamSource != null)
{
_cameraStreamSource.FrameRateChanged -= CameraStreamSource_FPSChanged;
_cameraStreamSource = null;
}
_cameraEffect = null;
}
private void Initialize()
{
StatusTextBlock.Text = AppResources.MainPage_Status_InitializingCamera;
_cameraEffect = new Effects {PhotoCaptureDevice = App.Camera, GlobalAlpha = 0.5};
_cameraEffect.SetTexture(App.Texture.File);
if (App.Texture.IsPositional)
{
DragHintText.Visibility = Visibility.Visible;
PinchHintText.Visibility = Visibility.Visible;
_angle = 0;
_initialAngle = 0;
_scale = DefaultScale;
_position = new Point(0.5, 0.5);
_initialPosition = new Point(0.5, 0.5);
RefreshTargetArea();
}
else {
DragHintText.Visibility = Visibility.Collapsed;
PinchHintText.Visibility = Visibility.Collapsed;
}
LevelSlider.Value = 0.5;
_cameraStreamSource = new CameraStreamSource(_cameraEffect, App.Camera.CaptureResolution);
_cameraStreamSource.FrameRateChanged += CameraStreamSource_FPSChanged;
_mediaElement = new MediaElement {Stretch = Stretch.UniformToFill, BufferingTime = new TimeSpan(0)};
_mediaElement.SetSource(_cameraStreamSource);
// Using VideoBrush in XAML instead of MediaElement, because otherwise
// CameraStreamSource.CloseMedia() does not seem to be called by the framework:/
BackgroundVideoBrush.SetSource(_mediaElement);
StatusTextBlock.Text = _cameraEffect.EffectName;
}