sane-project-website/old-archive/1999-10/0150.html

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<title>sane-devel: Re: 16 bit images</title>
<h1>Re: 16 bit images</h1>
<b>Oliver Rauch</b> (<a href="mailto:oliver.rauch@Wolfsburg.DE"><i>oliver.rauch@Wolfsburg.DE</i></a>)<br>
<i>Tue, 19 Oct 1999 17:29:13 +0200</i>
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Robert Schwebel wrote:<br>
<p>
<i>&gt; Oliver Rauch wrote:</i><br>
<i>&gt; &gt; xsane should work with color and grayscale images with 16 bits/pixel.</i><br>
<i>&gt;</i><br>
<i>&gt; Nope! From xsane-0.39/frontend/xsane-preview.c, function</i><br>
<i>&gt; preview_read_image_data:</i><br>
<i>&gt;</i><br>
<i>&gt; ----------8&lt;----------8&lt;----------8&lt;----------8&lt;----------</i><br>
<i>&gt; case SANE_FRAME_GRAY:</i><br>
<i>&gt;         switch (p-&gt;params.depth)</i><br>
<i>&gt;         {</i><br>
<i>&gt;           case 1:</i><br>
<i>&gt; [...]</i><br>
<i>&gt;           case 8:</i><br>
<i>&gt; [...]</i><br>
<i>&gt;           default:</i><br>
<i>&gt;             goto bad_depth;</i><br>
<i>&gt; ----------8&lt;----------8&lt;----------8&lt;----------8&lt;----------</i><br>
<i>&gt;</i><br>
<i>&gt; I tried to add a case 16, but as I don't exactly understand what's going</i><br>
<i>&gt; on here it does not really work. The frontend aquires an image and</i><br>
<i>&gt; displays it, but there seems to be a problem with byte order or</i><br>
<i>&gt; interpretation of pixel "short"s, as every second row becomes black.</i><br>
<i>&gt; Would you mind having a closer look at this?</i><br>
<i>&gt;</i><br>
<i>&gt;</i><br>
<p>
You did not see the following line before the block you quoted:<br>
<p>
  if ( (xsane.param.depth == 1) || (xsane.param.depth == 8) )<br>
  {<br>
<p>
there also is a<br>
else if ( xsane.param.depth == 16 )<br>
  {<br>
<p>
after that block.<br>
<p>
Bye<br>
Oliver<br>
<p>
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<li> <b>Next message:</b> <a href="0151.html">Oliver Rauch: "Re: Can a scanner be faster on Windows 98 than on Linux?"</a>
<li> <b>Previous message:</b> <a href="0149.html">Oliver Rauch: "Re: updating scsi bois?"</a>
<li> <b>Maybe in reply to:</b> <a href="0138.html">Robert Schwebel: "16 bit images"</a>
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<li> <b>Next in thread:</b> <a href="0157.html">Robert Schwebel: "Re: 16 bit images"</a>
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