public IRandomAccessStream CloneStream()
{
var cloned = new MemoryRandomAccessStream();
CopyTo(cloned);
return(cloned);
}
/// <summary>
/// Share the surface by using the Share-UI of Windows 10
/// </summary>
/// <param name="shareInfo">ShareInfo</param>
/// <param name="handle">IntPtr with the handle for the hosting window</param>
/// <param name="surface">ISurface with the bitmap to share</param>
/// <param name="captureDetails">ICaptureDetails</param>
/// <returns>Task with string, which describes the application which was used to share with</returns>
private async Task Share(ShareInfo shareInfo, IntPtr handle, ISurface surface, ICaptureDetails captureDetails)
{
using (var imageStream = new MemoryRandomAccessStream())
using (var logoStream = new MemoryRandomAccessStream())
using (var thumbnailStream = new MemoryRandomAccessStream())
{
var outputSettings = new SurfaceOutputSettings();
outputSettings.PreventGreenshotFormat();
// Create capture for export
ImageOutput.SaveToStream(surface, imageStream, outputSettings);
imageStream.Position = 0;
Log.Debug().WriteLine("Created RandomAccessStreamReference for the image");
var imageRandomAccessStreamReference = RandomAccessStreamReference.CreateFromStream(imageStream);
// Create thumbnail
RandomAccessStreamReference thumbnailRandomAccessStreamReference;
using (var tmpImageForThumbnail = surface.GetBitmapForExport())
using (var thumbnail = tmpImageForThumbnail.CreateThumbnail(240, 160))
{
ImageOutput.SaveToStream(thumbnail, null, thumbnailStream, outputSettings);
thumbnailStream.Position = 0;
thumbnailRandomAccessStreamReference = RandomAccessStreamReference.CreateFromStream(thumbnailStream);
Log.Debug().WriteLine("Created RandomAccessStreamReference for the thumbnail");
}
// Create logo
RandomAccessStreamReference logoRandomAccessStreamReference;
using (var logo = GreenshotResources.GetGreenshotIcon().ToBitmap())
using (var logoThumbnail = logo.CreateThumbnail(30, 30))
{
ImageOutput.SaveToStream(logoThumbnail, null, logoStream, outputSettings);
logoStream.Position = 0;
logoRandomAccessStreamReference = RandomAccessStreamReference.CreateFromStream(logoStream);
Log.Info().WriteLine("Created RandomAccessStreamReference for the logo");
}
var dataTransferManagerHelper = new DataTransferManagerHelper(handle);
dataTransferManagerHelper.DataTransferManager.ShareProvidersRequested += (sender, args) =>
{
shareInfo.AreShareProvidersRequested = true;
Log.Debug().WriteLine("Share providers requested: {0}", string.Join(",", args.Providers.Select(p => p.Title)));
};
dataTransferManagerHelper.DataTransferManager.TargetApplicationChosen += (dtm, args) =>
{
shareInfo.ApplicationName = args.ApplicationName;
Log.Debug().WriteLine("TargetApplicationChosen: {0}", args.ApplicationName);
};
var filename = FilenameHelper.GetFilename(OutputFormats.png, captureDetails);
var storageFile = await StorageFile.CreateStreamedFileAsync(filename, async streamedFileDataRequest =>
{
shareInfo.IsDeferredFileCreated = true;
// Information on the "how" was found here: https://socialeboladev.wordpress.com/2013/03/15/how-to-use-createstreamedfileasync/
Log.Debug().WriteLine("Creating deferred file {0}", filename);
try
{
using (var deferredStream = streamedFileDataRequest.AsStreamForWrite())
{
await imageStream.CopyToAsync(deferredStream).ConfigureAwait(false);
await imageStream.FlushAsync().ConfigureAwait(false);
}
// Signal that the stream is ready
streamedFileDataRequest.Dispose();
}
catch (Exception)
{
streamedFileDataRequest.FailAndClose(StreamedFileFailureMode.Incomplete);
}
}, imageRandomAccessStreamReference).AsTask().ConfigureAwait(false);
dataTransferManagerHelper.DataTransferManager.DataRequested += (dataTransferManager, dataRequestedEventArgs) =>
{
var deferral = dataRequestedEventArgs.Request.GetDeferral();
try
{
shareInfo.IsDataRequested = true;
Log.Debug().WriteLine("DataRequested with operation {0}", dataRequestedEventArgs.Request.Data.RequestedOperation);
var dataPackage = dataRequestedEventArgs.Request.Data;
dataPackage.OperationCompleted += (dp, eventArgs) =>
{
Log.Debug().WriteLine("OperationCompleted: {0}, shared with", eventArgs.Operation);
shareInfo.CompletedWithOperation = eventArgs.Operation;
shareInfo.AcceptedFormat = eventArgs.AcceptedFormatId;
shareInfo.ShareTask.TrySetResult(true);
};
dataPackage.Destroyed += (dp, o) =>
{
shareInfo.IsDestroyed = true;
Log.Debug().WriteLine("Destroyed");
shareInfo.ShareTask.TrySetResult(true);
};
dataPackage.ShareCompleted += (dp, shareCompletedEventArgs) =>
{
shareInfo.IsShareCompleted = true;
Log.Debug().WriteLine("ShareCompleted");
shareInfo.ShareTask.TrySetResult(true);
};
dataPackage.Properties.Title = captureDetails.Title;
dataPackage.Properties.ApplicationName = "Greenshot";
dataPackage.Properties.Description = "Share a screenshot";
dataPackage.Properties.Thumbnail = thumbnailRandomAccessStreamReference;
dataPackage.Properties.Square30x30Logo = logoRandomAccessStreamReference;
dataPackage.Properties.LogoBackgroundColor = Color.FromArgb(0xff, 0x3d, 0x3d, 0x3d);
dataPackage.SetStorageItems(new[] { storageFile });
dataPackage.SetBitmap(imageRandomAccessStreamReference);
}
finally
{
deferral.Complete();
Log.Debug().WriteLine("Called deferral.Complete()");
}
};
dataTransferManagerHelper.ShowShareUi();
Log.Debug().WriteLine("ShowShareUi finished.");
await shareInfo.ShareTask.Task.ConfigureAwait(false);
}
}
