[sane-devel] regarding SANE_STATUS_WARMING_UP

[m. allan noah]

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'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...

allan
-- 
"The truth is an offense, but not a sin"