public void Load(object state)
{
while (true)
{
LoadThumbnailRequest request;
lock (_syncLock)
{
if (_pendingRequests.Count == 0)
{
_isLoading = false;
break;
}
request = _pendingRequests[0];
_pendingRequests.RemoveAt(0);
}
LoadThumbnailResult result;
try
{
var image = _repository.GetThumbnail(request.Descriptor, request.Size);
result = new LoadThumbnailResult(request.Descriptor, image, request.Size);
}
catch (Exception e)
{
result = new LoadThumbnailResult(request.Descriptor, e);
}
request.ResultCallback(result);
}
}
private void OnThumbnailLoadedAsync(LoadThumbnailResult result)
{
try
{
//Dispose the image on the thread on which the image was rendered because of some weirdities with current rendering implementation.
result.Descriptor.ReferenceImage.Dispose();
SynchronizationContext.Post(ignore => OnThumbnailLoaded(result), null);
}
catch (Exception e)
{
Platform.Log(LogLevel.Error, e);
}
}
private void OnThumbnailLoaded(LoadThumbnailResult result)
{
//just toss it if it's not the size we are currently looking for, or we're disposed.
if (result.Error == null && (result.Size != _thumbnailSize || _isDisposed))
{
if (result.ThumbnailData != null)
{
result.ThumbnailData.Dispose();
}
}
else
{
ImageData = result.ThumbnailData ?? Loader.GetErrorThumbnail(_thumbnailSize);
_isImageValid = _isImageLoaded = true;
}
}