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<!-- received="Sun Feb 8 20:09:00 1998 PST" -->
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<!-- sent="Mon, 09 Feb 1998 04:08:52 +0000" -->
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<!-- name="Rex Vaughn" -->
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<!-- email="rvaughn@nova.org" -->
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<!-- subject="Re: HP C5100A Photscanner support" -->
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<!-- id="" -->
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<!-- inreplyto="HP C5100A Photscanner support" -->
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<title>sane-devel: Re: HP C5100A Photscanner support</title>
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<h1>Re: HP C5100A Photscanner support</h1>
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<b>Rex Vaughn</b> (<a href="mailto:rvaughn@nova.org"><i>rvaughn@nova.org</i></a>)<br>
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<i>Mon, 09 Feb 1998 04:08:52 +0000</i>
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<p>
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<ul>
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<li> <b>Next message:</b> <a href="0040.html">Dr. Michael Grimm: "REMOVE"</a>
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<li> <b>Previous message:</b> <a href="0038.html">Preston Brown: "Re: Astra 6X0S colormode"</a>
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</ul>
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<!-- body="start" -->
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Pkirchg wrote:<br>
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<i>> </i><br>
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<i>> Hi,</i><br>
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<i>> </i><br>
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<i>> I just got the information that the HP C5100 Photosmart Photoscanner</i><br>
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<i>> does really support HP-SCL. So I did some tests on Linux kernel 2.0.21</i><br>
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<i>> with the new sane 0.69 and it seems to work. With these tests I got</i><br>
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<i>> the following:</i><br>
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<i>> </i><br>
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<i>> Scanning negatives: supported from 100 to 2400 dpi</i><br>
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<i>> Problems:</i><br>
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<i>> - When scanning strips with 5 negatives of size 24x36mm,</i><br>
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<i>> the 5th image shows wrong colours (scanner firmware ?)</i><br>
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<p>
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I have noticed a problem while previewing a negative, however when the<br>
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actual <br>
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scan is done the last image seems fine. I started to dig in to the code<br>
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to <br>
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find out what was going on, and while scanning all but the last <br>
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"stripe" (block of 8192) of the negative, everything seems fine. <br>
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However,<br>
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when the last block is scanned in preview mode, the buffer returned from<br>
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sane_read() in input_available() (frontend/preview.c) does not change<br>
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from the<br>
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second to last block. Nor does sane_read return SANE_STATUS_EOF. After <br>
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six or so calls (each returning the same block slightly offset from the <br>
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previous "stripe") sane_read finally returns SANE_STATUS_EOF (with still<br>
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the same block in buf). (BTW I am assuming each block is slitly offset<br>
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from <br>
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each other because a block of 8192 bytes is not evenly divisible by the<br>
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width <br>
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of the negative)<br>
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<p>
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Any ideas on where to attack the problem next? <br>
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<p>
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I am using sane-0.70, gimp-0.99.18, gtk+-0.99.3 an aha152x scsi card,<br>
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which <br>
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came with an Iomega Bernoulli 150. (IE the scsi card does not have an<br>
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id<br>
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code that matches the scsi driver in the kernel, but it does work when<br>
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given <br>
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parameters on bootup.) and the linux kernel is 2.0.31. <br>
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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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<a href="mailto:rvaughn@nova.org">rvaughn@nova.org</a> (RBV)
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<p>
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<pre>
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--
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</pre>
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<p>
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<ul>
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<li> <b>Next message:</b> <a href="0040.html">Dr. Michael Grimm: "REMOVE"</a>
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<li> <b>Previous message:</b> <a href="0038.html">Preston Brown: "Re: Astra 6X0S colormode"</a>
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