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<TITLE>sane-devel: Snapscan backend</TITLE>
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<META NAME="Author" CONTENT="Steve Underwood (steveu@coppice.org)">
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<META NAME="Subject" CONTENT="Snapscan backend">
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<H1>Snapscan backend</H1>
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<!-- received="Sun May 14 00:00:36 2000" -->
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<!-- name="Steve Underwood" -->
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<!-- subject="Snapscan backend" -->
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<!-- id="391E4FF1.FEB49CD2@coppice.org" -->
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<STRONG>From:</STRONG> Steve Underwood (<A HREF="mailto:steveu@coppice.org?Subject=Re:%20Snapscan%20backend&In-Reply-To=<391E4FF1.FEB49CD2@coppice.org>"><EM>steveu@coppice.org</EM></A>)<BR>
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<STRONG>Date:</STRONG> Sun May 14 2000 - 00:04:17 PDT
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<P>
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<LI><STRONG>Next message:</STRONG> <A HREF="0096.html">Louis van Dompselaar: "Re: Snapscan backend"</A>
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<LI><STRONG>Previous message:</STRONG> <A HREF="0094.html">Karl Heinz Kremer: "Re: "Standard" or "best" image format?"</A>
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<LI><STRONG>Next in thread:</STRONG> <A HREF="0096.html">Louis van Dompselaar: "Re: Snapscan backend"</A>
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<LI><STRONG>Reply:</STRONG> <A HREF="0098.html">Louis van Dompselaar: "Re: Snapscan backend"</A>
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<LI><STRONG>Reply:</STRONG> <A HREF="0102.html">Louis van Dompselaar: "Re: Snapscan backend"</A>
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<P>
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Hi all,
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<BR>
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<P>I think I have basically completed the last key piece of the Snapscan
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<BR>
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backend which the original author left unfinished before he moved on. I
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<BR>
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now have a version with correctly merges the R, G and B images, and
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<BR>
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produces a clean full colour preview window and output file. So far I
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<BR>
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have not tried to do more than complete the original work. As it stands
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<BR>
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there are still some peculiarities. For example, the xsane dialog will
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<BR>
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say the image is X by Y pixels, but the resulting file is actually X by
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<BR>
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(Y - a small amount) due to the image realignment process. Ideally, the
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<BR>
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xsane dialogue would show exactly what the final result result will be.
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<BR>
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<P>So far I have:
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<BR>
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Taken the snapscan backend from Sane 1.0.2
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<BR>
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Merged Oliver Schwartz's transparency adaptor mods.
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<BR>
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Added my own mods for to support the Acer 610plus and 610S (actually
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<BR>
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only tested with my 610plus).
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<BR>
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Implemented the correct merging of the R, G and B images.
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<BR>
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<P>The code now seems to work no worse than before. By this I mean I can
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<BR>
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get various forms of odd behaviour with both the new and the old code. I
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<BR>
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have made a set of files available at
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<BR>
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<A HREF="ftp://ftp.coppice.org//pub/snapscan/snapscan-20000514.tar.gz">ftp://ftp.coppice.org//pub/snapscan/snapscan-20000514.tar.gz</A> This is a
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<BR>
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complete drop in replacement set of snapscan files for the ones in Sane
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<BR>
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1.0.2. The snapscan-310.c file you will find the the Sane 1.0.2
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<BR>
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distribution is actually left over junk from an older version of the
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<BR>
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snapscan backend, and can be thrown out.
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<BR>
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<P>Any feedback about this version is welcome.
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<BR>
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<P>Steve
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<BR>
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<P><P><P><PRE>
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--
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Source code, list archive, and docs: <A HREF="http://www.mostang.com/sane/">http://www.mostang.com/sane/</A>
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To unsubscribe: echo unsubscribe sane-devel | mail <A HREF="mailto:majordomo@mostang.com?Subject=Re:%20Snapscan%20backend&In-Reply-To=<391E4FF1.FEB49CD2@coppice.org>">majordomo@mostang.com</A>
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</PRE>
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<!-- next="start" -->
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<LI><STRONG>Next message:</STRONG> <A HREF="0096.html">Louis van Dompselaar: "Re: Snapscan backend"</A>
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<LI><STRONG>Previous message:</STRONG> <A HREF="0094.html">Karl Heinz Kremer: "Re: "Standard" or "best" image format?"</A>
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<LI><STRONG>Next in thread:</STRONG> <A HREF="0096.html">Louis van Dompselaar: "Re: Snapscan backend"</A>
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<LI><STRONG>Reply:</STRONG> <A HREF="0098.html">Louis van Dompselaar: "Re: Snapscan backend"</A>
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<EM>
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This archive was generated by <A HREF="http://www.hypermail.org/">hypermail 2b29</A>
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: <EM>Sun May 14 2000 - 00:01:24 PDT</EM>
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