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<!-- received="Fri Aug 20 11:13:33 1999 PDT" -->
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<!-- sent="Fri, 20 Aug 1999 19:16:45 +0100 (GMT)" -->
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<!-- name="Nick Lamb" -->
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<!-- email="njl98r@ecs.soton.ac.uk" -->
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<!-- subject="Re: SANE frames" -->
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<!-- inreplyto="199908201442.HAA29804@panda.mostang.com" -->
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<title>sane-devel: Re: SANE frames</title>
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<h1>Re: SANE frames</h1>
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<b>Nick Lamb</b> (<a href="mailto:njl98r@ecs.soton.ac.uk"><i>njl98r@ecs.soton.ac.uk</i></a>)<br>
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<i>Fri, 20 Aug 1999 19:16:45 +0100 (GMT)</i>
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<p>
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<ul>
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<li> <b>Messages sorted by:</b> <a href="date.html#245">[ date ]</a><a href="index.html#245">[ thread ]</a><a href="subject.html#245">[ subject ]</a><a href="author.html#245">[ author ]</a>
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<li> <b>Next message:</b> <a href="0246.html">David Nelson: "USB Support for HP Scanner"</a>
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<li> <b>Previous message:</b> <a href="0244.html">Stephen Williams: "Re: SANE frames"</a>
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<li> <b>In reply to:</b> <a href="0243.html">David Mosberger-Tang: "Re: SANE frames"</a>
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On Fri, 20 Aug 1999, David Mosberger-Tang wrote:<br>
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<p>
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<i>> I disagree. sane_start() is a signal that the frontend is ready to</i><br>
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<i>> read the next image. It does _not_ necessarily mean that the scanhead</i><br>
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<i>> should go back to its start position.</i><br>
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<p>
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Yes, haven't looked at this bit of the SANE standard recently, but that<br>
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whole area probably requires another few paragraphs of explanation<br>
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and/ or examples in SANE 1.1/2.0<br>
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<p>
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As Oliver says though, we have two cases for multiple images from the<br>
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new requirements (new to SANE at least)<br>
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<p>
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1. Several images from a particular page (it was mentioned that the<br>
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hardware is capable of perhaps 8 such images) or duplex scans<br>
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<p>
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2. Distinct pages, from an ADF or a high-speed scanner<br>
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<p>
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David, did you see my idea about adding "last_image" to the same place<br>
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as we currently indicate "last_frame" on a multi-frame image?<br>
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This flag would tell you when the frame you're seeing is the last<br>
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frame of the last image on a page. Old SANE 1.0 frontends will ignore<br>
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it and treat the whole series of images the same way they do now.<br>
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<p>
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(In think about this I was envisaging a high-speed frontend that spits<br>
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out image-1-1.jpg, image-1-2.jpg, image-1-3.jpg, image-2-1.jpg etc.)<br>
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<p>
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Nick.<br>
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<p>
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<p>
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<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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</pre>
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<!-- body="end" -->
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<p>
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<ul>
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<!-- next="start" -->
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<li> <b>Next message:</b> <a href="0246.html">David Nelson: "USB Support for HP Scanner"</a>
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<li> <b>Previous message:</b> <a href="0244.html">Stephen Williams: "Re: SANE frames"</a>
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<li> <b>In reply to:</b> <a href="0243.html">David Mosberger-Tang: "Re: SANE frames"</a>
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<!-- nextthread="start" -->
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<!-- reply="end" -->
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</ul>
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