Le jeudi 18 juin 2009 11:06:46 Alessandro Zummo, vous avez ?crit :
> On Thu, 18 Jun 2009 10:28:56 +0200
>
> Julien BLACHE <jb at jblache.org> wrote:
> > > there are buggy scanners that do not return a warming up condition
> > > unless you actually start to scan.
> >
> > And scanners like the Epson Perfection 2480 and friends that tells you
> > it needs 23 seconds for warmup, then another 8 seconds.
>
> I suggest we either create a generic retry return code or
> we start making them a bit field, but that would add complexity.
Hello,
in fact, I am thinking that the would be 'sane_prepare_to_scan()'
function
would have to be called before each scan(before each call at sane_start). And
it has to be called until it returns SANE_STATUS_GOOD and not
SANE_PREPARATION_IN_PROGRESS. A frontend would have the choice to either wait
the maximum time or poll it. The maximum wait time could be re-evaluated at
each call by the backend.
For scanners that don't know they need warming until they start a scan,
would
it be possible to start a 'internal' scan to trigger this ?
Regards,
Stef
