private async void Enqueue(Uri uri, string namebase, Mediatype type, Geoposition position, string extension = null)
{
DebugUtil.Log("ContentsDownloader: Enqueue " + uri.AbsolutePath);
if (extension == null)
{
var split = uri.AbsolutePath.Split('.');
if (split.Length > 0)
{
extension = "." + split[split.Length - 1].ToLower();
DebugUtil.Log("detected file extension: " + extension);
}
}
await SystemUtil.GetCurrentDispatcher().RunAsync(CoreDispatcherPriority.Low, () =>
{
var req = new DownloadRequest
{
Uri = uri,
NameBase = namebase,
Completed = OnFetched,
Error = OnFailed,
GeoPosition = position,
Mediatype = type,
extension = extension
};
DownloadQueue.Enqueue(req);
QueueStatusUpdated.Raise(DownloadQueue.Count);
ProcessQueueSequentially();
});
}
public static async Task SetAsBitmap(byte[] data, ImageDataSource target, HistogramCreator Histogram, CoreDispatcher Dispatcher = null)
{
using (var stream = new InMemoryRandomAccessStream())
{
await stream.WriteAsync(data.AsBuffer());
stream.Seek(0);
if (Dispatcher == null)
{
Dispatcher = SystemUtil.GetCurrentDispatcher();
}
if (Dispatcher == null)
{
return;
}
await Dispatcher.RunAsync(CoreDispatcherPriority.High, () =>
{
var image = new BitmapImage();
image.SetSource(stream);
target.Image = image;
});
if (Histogram == null)
{
return;
}
if (ApplicationSettings.GetInstance().IsHistogramDisplayed&& !Histogram.IsRunning)
{
await Dispatcher.RunAsync(CoreDispatcherPriority.Low, () =>
{
Histogram.IsRunning = true;
stream.Seek(0);
var image = new BitmapImage();
image.SetSource(stream);
var writableImage = new WriteableBitmap(image.PixelWidth, image.PixelHeight);
stream.Seek(0);
writableImage.SetSource(stream);
Histogram.CreateHistogram(writableImage);
});
}
else if (Histogram.IsRunning)
{
DebugUtil.Log("Histogram creating. skip.");
}
}
}