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<TITLE>sane-devel: scanimage and 3-pass scanners</TITLE>
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<META NAME="Author" CONTENT="Henning Meier-Geinitz (hmg-ml@gmx.de)">
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<META NAME="Subject" CONTENT="scanimage and 3-pass scanners">
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<H1>scanimage and 3-pass scanners</H1>
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<!-- received="Sat Apr 1 02:32:22 2000" -->
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<!-- sent="Sat, 1 Apr 2000 12:27:52 +0200" -->
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<!-- isosent="20000401102752" -->
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<!-- name="Henning Meier-Geinitz" -->
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<!-- email="hmg-ml@gmx.de" -->
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<!-- subject="scanimage and 3-pass scanners" -->
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<!-- id="20000401122752.A584@hmg1.vortex.swb.de" -->
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<STRONG>From:</STRONG> Henning Meier-Geinitz (<A HREF="mailto:hmg-ml@gmx.de?Subject=Re:%20scanimage%20and%203-pass%20scanners&In-Reply-To=<20000401122752.A584@hmg1.vortex.swb.de>"><EM>hmg-ml@gmx.de</EM></A>)<BR>
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<STRONG>Date:</STRONG> Sat Apr 01 2000 - 02:27:52 PST
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<P>
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<!-- next="start" -->
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<LI><STRONG>Next message:</STRONG> <A HREF="0001.html">Michael Krause: "Re: HP3300, documentation about non-SCL-scanners"</A>
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<HR NOSHADE><P>
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<P>
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Hi,
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<BR>
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<P>I just tried to use scanimage to scan in color mode with a 3-pass scanner
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<BR>
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(Mustek MFS-12000CX). It doesn't work, the scan is cancelled immediately
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<BR>
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after the start of the first frame (sane_cancel is called).
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<BR>
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<P>I think I found an error in scanimage.c. Look at the following code snippet
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<BR>
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in scan_it ():
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<BR>
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<P> if (!advance (&image))
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<BR>
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status = SANE_STATUS_NO_MEM;
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<BR>
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goto cleanup;
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<BR>
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<P>It's a check if the realloc in advance() succeded. I think the author of the
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<BR>
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program missed the {} around the two commands (as the indentation suggests).
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<BR>
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"goto cleanup" is called even if no error occured so the scan is stopped
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<BR>
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allways. Proposed correction:
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<BR>
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<P> if (!advance (&image))
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<BR>
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{
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<BR>
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status = SANE_STATUS_NO_MEM;
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<BR>
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goto cleanup;
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<BR>
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}
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<BR>
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<BR>
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This snipped is used three more times in the code. If I change all of them
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<BR>
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the scan is successful.
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<BR>
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<P>This should concern everyone using a 3-pass scanner and color mode.
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<BR>
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<P>Could somebody with more knowledge in the frontends look into it and fix it
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<BR>
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if I am correct?
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<BR>
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<P>Ciao, Henning
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<BR>
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<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:%20scanimage%20and%203-pass%20scanners&In-Reply-To=<20000401122752.A584@hmg1.vortex.swb.de>">majordomo@mostang.com</A>
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</PRE>
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<LI><STRONG>Next message:</STRONG> <A HREF="0001.html">Michael Krause: "Re: HP3300, documentation about non-SCL-scanners"</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>Sat Apr 01 2000 - 02:33:19 PST</EM>
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