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<TITLE>sane-devel: sane_get_parameters before sane_start</TITLE>
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<META NAME="Author" CONTENT="Frederik Ramm (frederik@remote.org)">
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<META NAME="Subject" CONTENT="sane_get_parameters before sane_start">
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<H1>sane_get_parameters before sane_start</H1>
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<!-- received="Mon Mar 5 12:53:19 2001" -->
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<!-- sent="Mon, 5 Mar 2001 21:11:28 +0000" -->
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<!-- isosent="20010305211128" -->
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<!-- name="Frederik Ramm" -->
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<!-- subject="sane_get_parameters before sane_start" -->
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<!-- id="20010305211127.A16058@aruba.remote.org" -->
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<STRONG>From:</STRONG> Frederik Ramm (<A HREF="mailto:frederik@remote.org?Subject=Re:%20sane_get_parameters%20before%20sane_start&In-Reply-To=<20010305211127.A16058@aruba.remote.org>"><EM>frederik@remote.org</EM></A>)<BR>
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<STRONG>Date:</STRONG> Mon Mar 05 2001 - 13:11:28 PST
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<LI><STRONG>Next message:</STRONG> <A HREF="0077.html">Oliver Rauch: "Re: sane_get_parameters before sane_start"</A>
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<P>
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Hi,
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<BR>
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<P> in the SANE spec it says:
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<BR>
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<P><EM>> While setting up the device, it is also admissible to call
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</EM><BR>
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<EM>> sane_get_parameters() to get an estimate of what the image
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</EM><BR>
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<EM>> parameters will look like once image acquisition begins.
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</EM><BR>
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<BR>
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Does that mean in the backend I have to calculate the scan width in
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<BR>
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pixels, the bytes per line value, etc. every time the user changes an
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<BR>
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option? Until now, I was planning to do these calculations only once,
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<BR>
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in sane_start, but that would mean that you'll get meaningless results
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<BR>
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from sane_get_parameters() unless sane_start has already been called.
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<BR>
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<P>Comments from the front-end writers?
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<BR>
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<P>Bye
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<BR>
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Frederik
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<BR>
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<P><PRE>
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--
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Frederik Ramm ## eMail <A HREF="mailto:frederik@remote.org?Subject=Re:%20sane_get_parameters%20before%20sane_start&In-Reply-To=<20010305211127.A16058@aruba.remote.org>">frederik@remote.org</A> ## N57<35>48.10' W005<30>40.32'
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<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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