Hi, I'm a bit confused with the use of sane_cancel(). I noticed today that the pixma backend requires a sane_cancel after each scan (libksane did not work correctly with the pixma backend). I have read here on the list: "5. be aware that a proper front-end in batch mode will call sane_start() at the beginning of each page, but only call sane_cancel after the last page returns SANE_STATUS_NO_DOCS."
Why does the frontend have to call sane_cancel() at the end of a scan? Is this a bug in the pixma backend (libksane works OK with at least the test, epson, epkowa and v4l backends), or is the pixma backend just more strict than the backends I have tested with before? (The problem was that the backend did not accept writes to any parameters after a scan without a cancel at the end.) I remember reading something about clarifying the use of sane_cancel() in the standard for 1.1, but I can't remember what it was about :) -- K?re S?rs
