I am looking for a way to make small, medium, and large copies of an image automatically when uploaded through CKFinder 2.5. Basically I want the same image copied and resized to different sizes so that I can use different images for my responsive site. The imageresize plugin does similar, but not quite what I am looking for since it is still initiated by the user.
I would prefer to add the code to the config file over adjusting code in the core folder. I am using coldfusion, but I would appreciate ideas in any language possible so I can make something work. Thanks in advance!