I want the image reader to accept a variant name (e.g. "thumb", "small") and then write the newly created image variant to disk before sending the output. In other words, so that a given image "IMG001.jpg" might be "read" with a variant "thumb" and on disk would now be: IMG001.jpg IMG001.thumb.jpg
Obviously, a hefty cost for the first time through on each image but just reading afterwards. I've initially done this by just copying the entire ImageReader into a new PersistentImageReader and inserting the applicable code in setup() and processStream(). Now that it's working how I'd like, I figured I'd just extend the ImageReader and only implement these two methods. The only way I can think to do it is somehow redirect the output into a buffer, write the buffer, then send it out. Is there a better way to extend a reader? Anyone have any clues as to how I might be able to buffer the ImageReader's output? Thanks, --tim
