[sane-devel] basic hs2p backend working

jazz_johnson at verizon.net jazz_johnson at verizon.net
Tue Oct 30 17:26:42 UTC 2007

On Tuesday 30 October 2007, m. allan noah wrote:

> you need to buffer the backside data, and return it (instead of
> scanning) after the second call to sane_start. there is no way to tell
> the frontend that half the data you are sending should be held for
> later.

> > I have an sp15c which duplexes so I've been looking over the sp15c
> > backend which uses threads and arrays of pipes neither of which my
> > backend uses.
I got confused here with so many open vi sessions. 
I was looking at the bh backend. I got my sp15c to "duplex" by having
my shell script prompt the user to flip the document stack over to scan
the backsides and then reassemble pages in correct order.
> look at the fujitsu backend. it is single threaded, but does duplex,
> using an (unfortunately large) buffer. It could also be implemented
> with temp files, but i'd make it a user option.
THANKS, I'll take a look at the fujitsu backend.
> allan
> --
> "The truth is an offense, but not a sin"

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