I noted that @fredldotme forked SeaPrint. So i guess you are looking in to adding printing to Ubuntu Touch.
I'm not planning on leaving Sailfish, but no need to hard-fork... Can't we work together?

Over in the Sailfish universe we have SeaPrint (by me)... so if someone wants to port it, feel free to get in touch.
No CUPS dependencies, strictly speaking no dependencies at all other than Qt, but poppler is needed for working with simpler printers.