private async void Canvas_Tap(object sender, System.Windows.Input.GestureEventArgs e)
{
if (!_focusing && !_capturing)
{
_focusing = true;
var point = e.GetPosition(Canvas);
var scaleX = _device.PreviewResolution.Width / Canvas.ActualWidth;
var scaleY = _device.PreviewResolution.Height / Canvas.ActualHeight;
// Show focusing bracket and set focus region if supported by the HW
if (PhotoCaptureDevice.IsFocusRegionSupported(SENSOR_LOCATION))
{
FocusBracket.RenderTransform = new TranslateTransform()
{
X = point.X,
Y = point.Y
};
FocusBracket.Visibility = Visibility.Visible;
_device.FocusRegion = new Windows.Foundation.Rect(point.X * scaleX, point.Y * scaleY, 1, 1);
}
// Focus and capture if focus is supported by the HW, otherwise just capture
if (PhotoCaptureDevice.IsFocusSupported(SENSOR_LOCATION))
{
CameraFocusStatus status;
try
{
status = await _device.FocusAsync();
}
catch (Exception)
{
status = CameraFocusStatus.NotLocked;
}
_focusing = false;
FocusBracket.Visibility = Visibility.Collapsed;
if (status == CameraFocusStatus.Locked)
{
await CaptureAsync();
}
}
else
{
await CaptureAsync();
}
}
}
/// <summary>
/// Uninitializes photo capture device and unwires device hardware capture keys.
/// </summary>
private void UninitializeCamera()
{
if (PhotoCaptureDevice.IsFocusSupported(SENSOR_LOCATION))
{
Microsoft.Devices.CameraButtons.ShutterKeyHalfPressed -= CameraButtons_ShutterKeyHalfPressed;
}
Microsoft.Devices.CameraButtons.ShutterKeyPressed -= CameraButtons_ShutterKeyPressed;
_device.Dispose();
_device = null;
}
public async Task AutoFocusAsync()
{
if (!_isInitialized || !_isFocused && PhotoCaptureDevice.IsFocusSupported(Device.SensorLocation))
{
SendFocused(new FocusedEventArgs(CameraFocusStatus.NotLocked));
CameraFocusStatus focusState = await Device.FocusAsync();
_isFocused = focusState == CameraFocusStatus.Locked;
SendFocused(new FocusedEventArgs(focusState));
}
}
/// <summary>
/// Starts autofocusing, if supported. Capturing buttons are disabled while focusing.
/// </summary>
private async Task AutoFocus()
{
if (!_capturing && PhotoCaptureDevice.IsFocusSupported(_dataContext.Device.SensorLocation))
{
SetScreenButtonsEnabled(false);
SetCameraButtonsEnabled(false);
await _dataContext.Device.FocusAsync();
SetScreenButtonsEnabled(true);
SetCameraButtonsEnabled(true);
_capturing = false;
}
}
private async void Focusing()
{
while (!stop)
{
if (PhotoCaptureDevice.IsFocusSupported(sensorLocation))
{
await PhotoCaptureDevice.FocusAsync();
}
else
{
System.Threading.Thread.Sleep(200);
}
}
PhotoCaptureDevice.PreviewFrameAvailable -= PreviewFrame;
PhotoCaptureDevice.Dispose();
PhotoCaptureDevice = null;
}
private async Task FocusAsyncInternal()
{
if (_inited)
{
if (!_focusing && PhotoCaptureDevice.IsFocusSupported(_device.SensorLocation))
{
_focusing = true;
try
{
await _device.FocusAsync();
}
finally
{
_focusing = false;
}
}
}
}
/// <summary>
/// Synchronously initializes the photo capture device for a high resolution photo capture.
/// Viewfinder video stream is sent to a VideoBrush element called ViewfinderVideoBrush, and
/// device hardware capture key is wired to the CameraButtons_ShutterKeyHalfPressed and
/// CameraButtons_ShutterKeyPressed methods.
/// </summary>
private void InitializeCamera()
{
Windows.Foundation.Size captureResolution;
var deviceName = DeviceStatus.DeviceName;
if (deviceName.Contains("RM-875") || deviceName.Contains("RM-876") || deviceName.Contains("RM-877"))
{
captureResolution = new Windows.Foundation.Size(7712, 4352); // 16:9
//captureResolution = new Windows.Foundation.Size(7136, 5360); // 4:3
}
else if (deviceName.Contains("RM-937") || deviceName.Contains("RM-938") || deviceName.Contains("RM-939"))
{
captureResolution = new Windows.Foundation.Size(5376, 3024); // 16:9
//captureResolution = new Windows.Foundation.Size(4992, 3744); // 4:3
}
else
{
captureResolution = PhotoCaptureDevice.GetAvailableCaptureResolutions(SENSOR_LOCATION).First();
}
var task = PhotoCaptureDevice.OpenAsync(SENSOR_LOCATION, captureResolution).AsTask();
task.Wait();
_device = task.Result;
_device.SetProperty(KnownCameraGeneralProperties.PlayShutterSoundOnCapture, true);
if (_flashButton != null)
{
SetFlashState(_flashState);
}
AdaptToOrientation();
ViewfinderVideoBrush.SetSource(_device);
if (PhotoCaptureDevice.IsFocusSupported(SENSOR_LOCATION))
{
Microsoft.Devices.CameraButtons.ShutterKeyHalfPressed += CameraButtons_ShutterKeyHalfPressed;
}
Microsoft.Devices.CameraButtons.ShutterKeyPressed += CameraButtons_ShutterKeyPressed;
}
