Hi sunjing, 孙静 writes:
> But How The Frontends can find this 'source' option, > if different Frontends and Backends,How they be compatible? That's all explained in the SANE API spec[1], but basically proper SANE frontends ask the backend for a list of its options and build a user interface from the information returned by the backend. [1]: http://sane-project.org/html/ In your case, that information would include your Duplex option, so a proper SANE frontend will include that in it's user interface for your scanner. Some SANE "frontends" have their own ideas of what they want to show their users and try to adapt the backend information to those ideas with various degrees of success. Last time I looked, Simple Scan was one of those. If you want your backend to "play nice" with such frontends, you would do well to check their expectations and adjust your backend to them. If you don't, your Duplex option may not be in the UI and you will have to ask the frontend developers to fix things, wait for a fixed release and wait again for the distributors to pick up the new release ... :-( Hope this helps, -- Olaf Meeuwissen, LPIC-2 FSF Associate Member since 2004-01-27 GnuPG key: F84A2DD9/B3C0 2F47 EA19 64F4 9F13 F43E B8A4 A88A F84A 2DD9 Support Free Software https://my.fsf.org/donate Join the Free Software Foundation https://my.fsf.org/join -- sane-devel mailing list: [email protected] https://alioth-lists.debian.net/cgi-bin/mailman/listinfo/sane-devel Unsubscribe: Send mail with subject "unsubscribe your_password" to [email protected]
