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109 wiersze
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<!-- received="Tue Aug 17 08:40:14 1999 PDT" -->
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<!-- sent="Mon, 16 Aug 1999 17:42:47 +0200" -->
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<!-- name="Oliver Rauch" -->
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<!-- email="oliver.rauch@Wolfsburg.DE" -->
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<!-- subject="Re: SANE frames" -->
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<!-- inreplyto="SANE frames" -->
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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>Oliver Rauch</b> (<a href="mailto:oliver.rauch@Wolfsburg.DE"><i>oliver.rauch@Wolfsburg.DE</i></a>)<br>
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<i>Mon, 16 Aug 1999 17:42:47 +0200</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#209">[ date ]</a><a href="index.html#209">[ thread ]</a><a href="subject.html#209">[ subject ]</a><a href="author.html#209">[ author ]</a>
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<li> <b>Next message:</b> <a href="0210.html">Oliver Rauch: "Re: SANE frames"</a>
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<li> <b>Previous message:</b> <a href="0208.html">Oliver Rauch: "Re: SANE V2"</a>
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<li> <b>Maybe in reply to:</b> <a href="0173.html">Stephen Williams: "SANE frames"</a>
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<!-- nextthread="start" -->
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<li> <b>Next in thread:</b> <a href="0210.html">Oliver Rauch: "Re: SANE frames"</a>
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<!-- reply="end" -->
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</ul>
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<!-- body="start" -->
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Hello Tom,<br>
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<p>
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<p>
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Tom Martone wrote:<br>
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<p>
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<i>></i><br>
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<i>> >From scanadf.adf.duplex.log</i><br>
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<i>></i><br>
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<i>> [bh] sane_init called</i><br>
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<i>> [bh] sane_open called</i><br>
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<i>> [bh] sane_control_option called (option:0, action:0)...</i><br>
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<i>> [bh] sane_get_option_descriptor called (option:0)...</i><br>
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<i>> [bh] sane_start called</i><br>
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<i>> [bh] sane_get_parameters called</i><br>
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<i>> [bh] sane_read called...</i><br>
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<p>
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here you have to call sane_cancel!<br>
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<p>
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<i>></i><br>
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<i>> [bh] sane_start called</i><br>
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<i>> [bh] sane_get_parameters called</i><br>
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<i>> [bh] sane_read called...</i><br>
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<p>
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here again<br>
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<p>
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<p>
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<i>></i><br>
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<i>> [bh] sane_start called</i><br>
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<i>> [bh] sane_get_parameters called</i><br>
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<i>> [bh] sane_read called...</i><br>
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<i>></i><br>
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<i>></i><br>
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<i>></i><br>
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<i>> The resulting behavior is that scanadf gets 6 images and xsane gets</i><br>
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<i>> 3 images. The reason is that each frontend has a different idea on</i><br>
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<i>> when sane_cancel must be called. Oliver tells me that the scanadf</i><br>
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<i>> behavior is not conforming to the standard; I don't share that view</i><br>
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<i>> and would welcome others to comment.</i><br>
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<i>></i><br>
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<p>
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the sane standard defines of how much frames an image consists.<br>
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After the last frame - that means if the image is transferred completly -<br>
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the frontend has to call sane_cancel.<br>
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<p>
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We should not changes this behaviour!!!<br>
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<p>
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But when we define the sane-standard version 2 we can add new function calls,<br>
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so we could add a call like sane_start_next() that tells the backend to transmit<br>
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<p>
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the next image of the scan that is done.<br>
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<p>
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Your frontend (scanadf) and your backend do not work like described in<br>
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the sane standard in the moment.<br>
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<p>
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Please do not try to change the recent standard in a way that everthing else<br>
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has to be changed. We should make a new standard that is as compatible as<br>
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possible to the existing one!<br>
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<p>
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Bye<br>
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Oliver<br>
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<p>
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<pre>
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--
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EMAIL: <a href="mailto:Oliver.Rauch@Wolfsburg.DE">Oliver.Rauch@Wolfsburg.DE</a>
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WWW: <a href="http://www.wolfsburg.de/~rauch">http://www.wolfsburg.de/~rauch</a>
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<p>
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<p>
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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="0210.html">Oliver Rauch: "Re: SANE frames"</a>
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<li> <b>Previous message:</b> <a href="0208.html">Oliver Rauch: "Re: SANE V2"</a>
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<li> <b>Maybe in reply to:</b> <a href="0173.html">Stephen Williams: "SANE frames"</a>
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<!-- nextthread="start" -->
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<li> <b>Next in thread:</b> <a href="0210.html">Oliver Rauch: "Re: SANE frames"</a>
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<!-- reply="end" -->
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</ul>
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