[sane-devel] regarding SANE_STATUS_WARMING_UP

[Olaf Meeuwissen]

"m. allan noah" <kitno455 at gmail.com> writes:

> On Sun, May 31, 2009 at 7:23 PM, Olaf Meeuwissen
> <olaf.meeuwissen at avasys.jp> wrote:
>> "m. allan noah" <kitno455 at gmail.com> writes:
>>
>>> [snip]
>>> I also would like to add a generic 'SANE_STATUS_RETRY' for those cases
>>> where the backend has to block during sane_start because it must
>>> ingest the entire image before the size is known.
>>
>> The standard allows backends to return an unknown height, so what kind
>> of cases are there when the width can't be known before slurping in the
>> whole image?
>
> most medium/large fujitsu machines will auto crop or auto rotate, but
> the command to request the size returns the data for the previous
> page, so you have to read until eof from the machine.

I see.

>>> I'd rather not block...
>>
>> I'd rather not hog memory ... ;-)
>
> do you support any machines which interlace front-side and back-side
> duplex data? then you already do...

Yes, but in that case I have no alternative.

Hope this helps,
-- 
Olaf Meeuwissen, LPIC-2           FLOSS Engineer -- AVASYS Corporation
FSF Associate Member #1962               Help support software freedom
                 http://www.fsf.org/jf?referrer=1962