ZXlib initialization code

MainPage.cs

        private void OnPhotoCameraInitialized(object sender, CameraOperationCompletedEventArgs e)
        {
            int width = Convert.ToInt32(_photoCamera.PreviewResolution.Width);
            int height = Convert.ToInt32(_photoCamera.PreviewResolution.Height);
            
            _luminance = new PhotoCameraLuminanceSource(width, height);
            _reader = new QRCodeReader();

            Dispatcher.BeginInvoke(() => {
                _previewTransform.Rotation = _photoCamera.Orientation;
                _timer.Start();
            });
        }