public async Task <Size?> GetPhotoResolutionAsync()
{
Size?size = null;
if (_propertiesCache.Pending)
{
await _propertiesCache.WaitAsync();
}
else if (_propertiesCache.Result == null)
{
await _propertiesCache.Execute(_file.Properties.GetImagePropertiesAsync().AsTask());
}
if (_propertiesCache.Result != null)
{
size = new Size(_propertiesCache.Result.Width, _propertiesCache.Result.Height);
}
return(size);
}
public async Task <IRandomAccessStream> GetPreviewAsync()
{
if (_previewCache.Pending)
{
await _previewCache.WaitAsync();
}
else if (_previewCache.Result == null)
{
await _previewCache.Execute(GetPreviewStreamAsync());
}
return(_previewCache.Result.CloneStream());
}
public async Task <IRandomAccessStream> GetThumbnailAsync()
{
if (_thumbnailCache.Pending)
{
await _thumbnailCache.WaitAsync();
}
else if (_thumbnailCache.Result == null)
{
await _thumbnailCache.Execute(GetThumbnailStreamAsync());
}
return(_thumbnailCache.Result.CloneStream());
}
public async Task <IRandomAccessStream> GetFilteredThumbnailAsync()
{
if (_thumbnailCache.Pending)
{
await _thumbnailCache.WaitAsync();
}
else if (_thumbnailCache.Result == null || _thumbnailCache.Version != Version)
{
_thumbnailCache.Invalidate();
try
{
await _thumbnailCache.Execute(GetFilteredThumbnailStreamAsync(), Version);
}
catch (Exception ex)
{
System.Diagnostics.Debug.WriteLine("GetFilteredThumbnailStreamAsync threw: " + ex.Message);
}
}
return(_thumbnailCache.Result.CloneStream());
}