private async void OnColorMapImageTapped(object sender, TappedRoutedEventArgs e)
{
RenderTargetBitmap bitmap = new RenderTargetBitmap();
await bitmap.RenderAsync(colorMapImage);
uint width = (uint)bitmap.PixelWidth;
uint height = (uint)bitmap.PixelHeight;
Point point = e.GetPosition(colorMapImage);
int pointX = (int)((double)(point.X / colorMapImage.ActualWidth) * width);
int pointY = (int)((double)(point.Y / colorMapImage.ActualHeight) * height);
System.Diagnostics.Debug.WriteLine("Picked point is [" + (int)point.X + "; " + (int)point.Y
+ "], size of the color map image is "
+ (int)colorMapImage.ActualWidth + "x" + (int)colorMapImage.ActualHeight
+ " => point in image is [" + pointX + "; " + pointY + "]");
IBuffer pixelBuffer = await bitmap.GetPixelsAsync();
_brightnessSliderValueChangedByPickedColor = true;
PreviewColor = ImageProcessingUtils.GetColorAtPoint(pixelBuffer, width, height, new Point()
{
X = pointX, Y = pointY
});
_originalColor = PreviewColor;
}
private async void OnFrameCapturedAsync(byte[] pixelArray, int frameWidth, int frameHeight, int frameId)
{
_videoEngine.Messenger.FrameCaptured -= OnFrameCapturedAsync;
System.Diagnostics.Debug.WriteLine("OnFrameCapturedAsync");
await CoreApplication.MainView.CoreWindow.Dispatcher.RunAsync(CoreDispatcherPriority.Normal, async() =>
{
WriteableBitmap bitmap = await ImageProcessingUtils.PixelArrayToWriteableBitmapAsync(pixelArray, frameWidth, frameHeight);
if (bitmap != null)
{
capturedPhotoImage.Source = bitmap;
bitmap.Invalidate();
capturedPhotoImage.Visibility = Visibility.Visible;
if (frameId == ColorPickFrameRequestId)
{
int scaledWidth = (int)(_videoEngine.ResolutionWidth *viewfinderCanvas.ActualHeight / _videoEngine.ResolutionHeight);
int pointX = (int)(((_viewFinderCanvasTappedPoint.X - (viewfinderCanvas.ActualWidth - scaledWidth) / 2) / scaledWidth) * frameWidth);
int pointY = (int)((_viewFinderCanvasTappedPoint.Y / viewfinderCanvas.ActualHeight) * frameHeight);
SetColor(ImageProcessingUtils.GetColorAtPoint(
bitmap, (uint)frameWidth, (uint)frameHeight, new Point()
{
X = pointX, Y = pointY
}));
}
if (_hideCapturePhotoImageTimer != null)
{
_hideCapturePhotoImageTimer.Dispose();
_hideCapturePhotoImageTimer = null;
}
_hideCapturePhotoImageTimer = new Timer(HideCapturedPhotoImageAsync, null, 8000, Timeout.Infinite);
}
_videoEngine.Messenger.FrameCaptured += OnFrameCapturedAsync;
});
}
