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<TITLE>sane-devel: Re: Xsane-0.55: scan resolution selection (Epson 12</TITLE>
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<H1>Re: Xsane-0.55: scan resolution selection (Epson 1200S, CVS Sane)</H1>
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<STRONG>From:</STRONG> Oliver Rauch (<A HREF="mailto:oliver.rauch@Wolfsburg.DE?Subject=Re:%20Xsane-0.55:%20scan%20resolution%20selection%20(Epson%201200S,%20CVS%20Sane)&In-Reply-To=&lt;38AED7D4.F2A1A3DF@wolfsburg.de&gt;"><EM>oliver.rauch@Wolfsburg.DE</EM></A>)<BR>
<STRONG>Date:</STRONG> Sat Feb 19 2000 - 09:50:12 PST
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Karl Heinz Kremer wrote:
<BR>
<P><EM>&gt; On Sat, Feb 19, 2000 at 01:23:49PM +0100, Oliver Rauch wrote:
</EM><BR>
<EM>&gt; &gt; Hello Karl Heinz,
</EM><BR>
<EM>&gt; &gt;
</EM><BR>
<EM>&gt; &gt; the sane standard defines only one &quot;resolution&quot; as well known option.
</EM><BR>
<EM>&gt; &gt; It does not make sense to have a &quot;preview resolution&quot; option because
</EM><BR>
<EM>&gt; &gt; the frontend has to set the correct resolution in each case and like defined
</EM><BR>
<EM>&gt; &gt; in the standard xscanimage and xsane do set the option &quot;resolution&quot;.
</EM><BR>
<EM>&gt; &gt;
</EM><BR>
<EM>&gt; &gt; If the preview resolution option is removed from the epson backend
</EM><BR>
<EM>&gt; &gt; everything will work fine.
</EM><BR>
<EM>&gt;
</EM><BR>
<EM>&gt; OK, so let me see if I understand this correctly: I don't have to set
</EM><BR>
<EM>&gt; the preview resolution in the backend, this is done in the frontend.
</EM><BR>
<EM>&gt; Therefore it does not make sense to have a &quot;preview resolution&quot; selection.
</EM><BR>
<P>It does not matter if you do a preview or a real scan, the option
<BR>
&quot;resolution&quot; always defines the resolution.
<BR>
<P><EM>&gt; If this assumtion is correct I can remove the preview resolution.
</EM><BR>
<EM>&gt; I do however doubt that &quot;everything will work fine&quot; after I remove
</EM><BR>
<EM>&gt; that option. You still don't know which resolutions are supported
</EM><BR>
<EM>&gt; by the scanner if I implement the resolution option as a range vs.
</EM><BR>
<EM>&gt; as a list. So the resolution list will still display a &quot;synthetic&quot;
</EM><BR>
<EM>&gt; set of resolutions.
</EM><BR>
<P>If the scanner only supports a list of resolutions create a
<BR>
Word_List of the type SANE_Int instead of a range.
<BR>
(there are already some backends that do so).
<BR>
<P>A range only makes sense if the scanner is able to scan
<BR>
with almost all resolutions the user can select.
<BR>
<P>Bye
<BR>
Oliver
<BR>
<P><PRE>
--
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E-Mail: mailto:<A HREF="mailto:Oliver.Rauch@Wolfsburg.DE?Subject=Re:%20Xsane-0.55:%20scan%20resolution%20selection%20(Epson%201200S,%20CVS%20Sane)&In-Reply-To=&lt;38AED7D4.F2A1A3DF@wolfsburg.de&gt;">Oliver.Rauch@Wolfsburg.DE</A>
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