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<TITLE>sane-devel: Re: Segfault in xscanimage</TITLE>
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<META NAME="Author" CONTENT="Oliver Rauch (oliver.rauch@Wolfsburg.DE)">
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<META NAME="Subject" CONTENT="Re: Segfault in xscanimage">
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<H1>Re: Segfault in xscanimage</H1>
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<!-- subject="Re: Segfault in xscanimage" -->
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<STRONG>From:</STRONG> Oliver Rauch (<A HREF="mailto:oliver.rauch@Wolfsburg.DE?Subject=Re:%20Segfault%20in%20xscanimage&In-Reply-To=<38936A68.6BF8189B@wolfsburg.de>"><EM>oliver.rauch@Wolfsburg.DE</EM></A>)<BR>
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<STRONG>Date:</STRONG> Sat Jan 29 2000 - 14:32:08 PST
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<LI><STRONG>Next message:</STRONG> <A HREF="0283.html">Meir Faraj: "About scanning with an USB scanner ."</A>
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<LI><STRONG>Previous message:</STRONG> <A HREF="0281.html">Ewald R. de Wit: "Re: HP PhotoSmart: Feeding slides, the entire area is not scanned"</A>
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<LI><STRONG>In reply to:</STRONG> <A HREF="0280.html">Karl Heinz Kremer: "Re: Segfault in xscanimage"</A>
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<LI><STRONG>Next in thread:</STRONG> <A HREF="0283.html">Meir Faraj: "About scanning with an USB scanner ."</A>
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<P>
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Karl Heinz Kremer wrote:
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<BR>
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<P><EM>> On Sat, Jan 29, 2000 at 05:40:07PM +0100, Oliver Rauch wrote:
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</EM><BR>
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<EM>> > Hi Karl Heinz
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</EM><BR>
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<EM>> >
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</EM><BR>
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<EM>> > try if it works when you comment out:
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</EM><BR>
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<EM>> > s->opt[ OPT_GAMMA_VECTOR].cap |= SANE_CAP_ADVANCED;
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</EM><BR>
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<EM>> > and the equivalent lines for red/green/blue
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</EM><BR>
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<EM>> >
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</EM><BR>
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<EM>>
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</EM><BR>
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<EM>> How did you know? When I remove the "Advanced" settings from
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</EM><BR>
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<EM>> the Options then it works. This however causes the gamma curves
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</EM><BR>
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<EM>> to be placed on the "normal" interface of xscanimage and not the
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</EM><BR>
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<EM>> advanced one where they belong (IMHO).
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</EM><BR>
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<EM>>
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</EM><BR>
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<P>The gamma curves are placed in an own box in xscanimage.
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<BR>
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You wrote you get a crash when you disable the advanced options
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<BR>
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and I never have seen that someone put the gamma table into "advanced",
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<BR>
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so it was relative simple to guess.
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<BR>
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<P>If you add a bool option "custom gamma table" (take a look in saneopts.h)
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<BR>
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that sets the gamma vectors to .cap |= SANE_CAP_INACTIVE
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<BR>
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then the user can disable the gamma table compareable to the way the
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<BR>
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advanced options can be enabled/disabled.
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<BR>
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<P>Of course it is a bug in xscanimage that you get a segfault. But I think it is not
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<BR>
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too bad in the moment!
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<BR>
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<P>Bye
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<BR>
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Oliver
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<BR>
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<P><P><PRE>
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--
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Homepage: <A HREF="http://www.wolfsburg.de/~rauch">http://www.wolfsburg.de/~rauch</A>
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sane-umax: <A HREF="http://www.wolfsburg.de/~rauch/sane/sane-umax.html">http://www.wolfsburg.de/~rauch/sane/sane-umax.html</A>
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xsane: <A HREF="http://www.wolfsburg.de/~rauch/sane/sane-xsane.html">http://www.wolfsburg.de/~rauch/sane/sane-xsane.html</A>
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E-Mail: mailto:<A HREF="mailto:Oliver.Rauch@Wolfsburg.DE?Subject=Re:%20Segfault%20in%20xscanimage&In-Reply-To=<38936A68.6BF8189B@wolfsburg.de>">Oliver.Rauch@Wolfsburg.DE</A>
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<P><P><P><P>--
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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:%20Segfault%20in%20xscanimage&In-Reply-To=<38936A68.6BF8189B@wolfsburg.de>">majordomo@mostang.com</A>
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</PRE>
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<LI><STRONG>Next message:</STRONG> <A HREF="0283.html">Meir Faraj: "About scanning with an USB scanner ."</A>
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<LI><STRONG>Previous message:</STRONG> <A HREF="0281.html">Ewald R. de Wit: "Re: HP PhotoSmart: Feeding slides, the entire area is not scanned"</A>
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<LI><STRONG>In reply to:</STRONG> <A HREF="0280.html">Karl Heinz Kremer: "Re: Segfault in xscanimage"</A>
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<LI><STRONG>Next in thread:</STRONG> <A HREF="0283.html">Meir Faraj: "About scanning with an USB scanner ."</A>
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<LI><STRONG>Reply:</STRONG> <A HREF="0283.html">Meir Faraj: "About scanning with an USB scanner ."</A>
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This archive was generated by <A HREF="http://www.hypermail.org/">hypermail 2b29</A>
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: <EM>Sat Jan 29 2000 - 14:26:41 PST</EM>
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