BaconographyWP8.View.ScalingPictureView.OnImageOpened C# (CSharp) Method

		async void OnImageOpened(object sender, RoutedEventArgs e)
		{
            Messenger.Default.Send<LoadingMessage>(new LoadingMessage { Loading = false });
            int yieldCount = 0;
            //sanity check just in case the viewport hasnt been put into the visual tree, we need to wait until it is
            while(!(viewport != null && viewport.ActualHeight > 100 && viewport.ActualWidth > 100 && _bitmap != null && _bitmap.PixelHeight != 0 && _bitmap.PixelWidth != 0))
            {
                if (yieldCount++ > 10)
                {
                    return;
                }
                await Task.Yield();
            }

            var result = CoerceScaleImpl(viewport.ActualWidth, viewport.ActualHeight, _bitmap.PixelWidth, _bitmap.PixelHeight, 0.0);
            _minScale = result.Item1;
            _scale = result.Item2;

			ResizeImage(true);
            image.Source = _bitmap;
		}