[sane-devel] SANE2 plans: RFC

[Oliver Rauch]

Please don`t mix versions in the backend.
There is no reel advantage to create a backend that supports version1 and=
=20
version2.
But it makes the backends very complex, large and has a high risk for bug=
s.

Oliver

On Sunday 10 August 2003 10:06, Thomas Soumarmon wrote:
> Le Samedi 9 Ao=FBt 2003 12:34, Major A a =E9crit :
> > Hi,
> >
> > I think that we should get the SANE2 implementation rolling, even if
> > the standard isn't completely finalized. A standard is never final
> > without even a single frontend and backend to use it.
> >
> > As Henning has said, adapting the test backend and scanimage should b=
e
> > first. But how shall we do that in CVS? The frontend should be easy
> > enough because it can check for the backend version to see whether
> > SANE1 or SANE2 is used, making it completely transparent to the
> > user. But there is no version-check facility for frontends, so
> > backends will be a bit more difficult.
>
> Just a thought. Could SANE2 introduce a handcheck protocol to determine
> which API is used :
> frontend_knows_versions( list_of_versions )
> backend_agrees_to_use( version )
> frontend_confirms_use_version( version )
>
> If those functions are not found in backend -> SANE1
> If those functions are not called by frontend -> SANE1
>
> That would avoid a CVS mess up.
>
> As I did not follow the whole thread about that, I may be completely wr=
ong,
> tell me if this is the case.
>
>
> Have a nice day,
>
> Thomas.
>
>
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