internal void WriteThumbnail(Stream stream, IResizeOptions options)
{
if (stream == null)
{
throw new ArgumentNullException("stream");
}
if (options == null)
{
throw new ArgumentNullException("options");
}
Pipeline pipeline = null;
try
{
using (var readStream = options.GetSourceImageReadStream())
using (var reader = ImageReader.Create(readStream))
{
IImageParams firstElement;
var psdReader = reader as PsdReader;
if (psdReader != null)
{
if (psdReader.MergedImageFrame == null)
{
throw new MediaUnsupportedException("Cannot read merged image frame from from PSD.");
}
firstElement = psdReader.MergedImageFrame;
}
else
{
firstElement = reader;
}
pipeline = new Pipeline((PipelineElement)firstElement);
if (firstElement.Width != options.Size.Width || firstElement.Height != options.Size.Height)
{
pipeline.Add(new Resize(options.Size, ResizeInterpolationMode.Anisotropic9, options.ResizeMode));
}
var cc = ColorManagement.GetColorConverter(options.ColorManagement, firstElement, options.PixelFormat, true);
if (cc != null)
{
pipeline.Add(cc);
}
pipeline.Add(ImageWriter.Create(stream, Common.GetWriterSettings(options.FileFormat)));
pipeline.Run();
}
}
finally
{
if (pipeline != null)
{
pipeline.DisposeAllElements();
}
}
}
public string GetThumbnail(IResizeOptions options)
{
var fileId = options.ThumbnailId;
if (_fileCache.FileExists(fileId))
{
return(fileId);
}
try
{
_fileCache.WriteToStream(fileId, s =>
{
WriteThumbnail(s, options);
});
}
catch (Exception)
{
_fileCache.RemoveFile(fileId);
throw;
}
return(fileId);
}
