/// <summary>
/// Asynchronously saves the <paramref name="photo" /> given to the camera roll album.
/// </summary>
/// <param name="photo">Photo to save.</param>
/// <returns>Image with thumbnail.</returns>
/// <exception cref="ArgumentNullException"><paramref name="photo"/> is <see langword="null"/>.</exception>
public async Task<IThumbnailedImage> SaveResultToCameraRollAsync(ICapturedPhoto photo)
{
if (photo == null)
{
throw new ArgumentNullException("photo");
}
Tracing.Trace("StorageService: Trying to save picture to the Camera Roll.");
Picture cameraRollPicture;
string name = this.GeneratePhotoName();
using (InMemoryRandomAccessStream stream = new InMemoryRandomAccessStream())
{
// Convert image to JPEG format and rotate in accordance with the original photo orientation.
Tracing.Trace("StorageService: Converting photo to JPEG format. Size: {0}x{1}, Rotation: {2}", photo.Width, photo.Height, photo.Rotation);
byte[] pixelData = await photo.DetachPixelDataAsync();
BitmapEncoder encoder = await BitmapEncoder.CreateAsync(BitmapEncoder.JpegEncoderId, stream);
encoder.BitmapTransform.Rotation = photo.Rotation;
encoder.BitmapTransform.Flip = photo.Flip;
encoder.IsThumbnailGenerated = true;
encoder.SetPixelData(BitmapPixelFormat.Bgra8, BitmapAlphaMode.Ignore, photo.Width, photo.Height, Constants.DefaultDpiX, Constants.DefaultDpiY, pixelData);
await encoder.FlushAsync();
cameraRollPicture = this.lazyMediaLibrary.Value.SavePictureToCameraRoll(name, stream.AsStream());
}
Tracing.Trace("StorageService: Saved to Camera Roll as {0}", name);
return new MediaLibraryThumbnailedImage(cameraRollPicture);
}
/// <summary>
/// Asynchronously saves the <paramref name="photo" /> given to the camera roll album.
/// </summary>
/// <param name="photo">Photo to save.</param>
/// <returns>Image with thumbnail.</returns>
/// <exception cref="ArgumentNullException"><paramref name="photo"/> is <see langword="null"/>.</exception>
public async Task <IThumbnailedImage> SaveResultToCameraRollAsync(ICapturedPhoto photo)
{
if (photo == null)
{
throw new ArgumentNullException("photo");
}
Tracing.Trace("StorageService: Trying to save picture to the Camera Roll.");
Picture cameraRollPicture;
string name = this.GeneratePhotoName();
using (InMemoryRandomAccessStream stream = new InMemoryRandomAccessStream())
{
// Convert image to JPEG format and rotate in accordance with the original photo orientation.
Tracing.Trace("StorageService: Converting photo to JPEG format. Size: {0}x{1}, Rotation: {2}", photo.Width, photo.Height, photo.Rotation);
byte[] pixelData = await photo.DetachPixelDataAsync();
BitmapEncoder encoder = await BitmapEncoder.CreateAsync(BitmapEncoder.JpegEncoderId, stream);
encoder.BitmapTransform.Rotation = photo.Rotation;
encoder.BitmapTransform.Flip = photo.Flip;
encoder.IsThumbnailGenerated = true;
encoder.SetPixelData(BitmapPixelFormat.Bgra8, BitmapAlphaMode.Ignore, photo.Width, photo.Height, Constants.DefaultDpiX, Constants.DefaultDpiY, pixelData);
await encoder.FlushAsync();
cameraRollPicture = this.lazyMediaLibrary.Value.SavePictureToCameraRoll(name, stream.AsStream());
}
Tracing.Trace("StorageService: Saved to Camera Roll as {0}", name);
return(new MediaLibraryThumbnailedImage(cameraRollPicture));
}
/// <summary>
/// The <see cref="PhotoCamera.PhotoCaptured"/> event handler.
/// </summary>
/// <param name="sender">Event sender.</param>
/// <param name="capturedPhoto">Captured photo.</param>
private void CameraOnPhotoCaptured(object sender, ICapturedPhoto capturedPhoto)
{
// In our application we capture only single frame, so we can update view model state in
// the current method.
// If your application captures multiple frames, you may want to modify the 'CameraOnCaptureStopped'
// method or add additional logic here.
DispatcherHelper.BeginInvokeOnUIThread(async() =>
{
this.State = MainPageViewModelState.SavingCaptureResult;
this.NotifyFocusStateChanged(new FocusStateChangedEventArgs(FocusState.Unlocked));
try
{
using (capturedPhoto)
{
IThumbnailedImage image = await this.storageService.SaveResultToCameraRollAsync(capturedPhoto);
// Get the preview image.
BitmapImage source = new BitmapImage();
source.SetSource(image.GetThumbnailImage());
this.Items.Add(image);
this.ReviewImageBrush = new ImageBrush {
ImageSource = source
};
}
}
finally
{
this.State = MainPageViewModelState.Loaded;
}
});
}
/// <summary>
/// Notifies the <see cref="PhotoCaptured"/> event listeners.
/// </summary>
/// <param name="frame">Captured frame.</param>
private void NotifyPhotoCaptured(ICapturedPhoto frame)
{
EventHandler <ICapturedPhoto> handler = this.PhotoCaptured;
if (handler != null)
{
handler.Invoke(this, frame);
}
}
/// <summary>
/// Notifies the <see cref="PhotoCaptured"/> event listeners.
/// </summary>
/// <param name="frame">Captured frame.</param>
private void NotifyPhotoCaptured(ICapturedPhoto frame)
{
EventHandler<ICapturedPhoto> handler = this.PhotoCaptured;
if (handler != null)
{
handler.Invoke(this, frame);
}
}
/// <summary>
/// The <see cref="PhotoCamera.PhotoCaptured"/> event handler.
/// </summary>
/// <param name="sender">Event sender.</param>
/// <param name="capturedPhoto">Captured photo.</param>
private void CameraOnPhotoCaptured(object sender, ICapturedPhoto capturedPhoto)
{
// In our application we capture only single frame, so we can update view model state in
// the current method.
// If your application captures multiple frames, you may want to modify the 'CameraOnCaptureStopped'
// method or add additional logic here.
DispatcherHelper.BeginInvokeOnUIThread(async () =>
{
this.State = MainPageViewModelState.SavingCaptureResult;
this.NotifyFocusStateChanged(new FocusStateChangedEventArgs(FocusState.Unlocked));
try
{
using (capturedPhoto)
{
IThumbnailedImage image = await this.storageService.SaveResultToCameraRollAsync(capturedPhoto);
// Get the preview image.
BitmapImage source = new BitmapImage();
source.SetSource(image.GetThumbnailImage());
this.Items.Add(image);
this.ReviewImageBrush = new ImageBrush { ImageSource = source };
}
}
finally
{
this.State = MainPageViewModelState.Loaded;
}
});
}
