# Re: Transparency support for snapscan backend

From: Karlheinz Günster (karlheinz.guenster@t-online.de)
Date: Fri May 05 2000 - 00:00:07 PDT

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  Am Die, 02 Mai 2000 schrieb Oliver Schwartz:

  Hi Oliver,

  > > > I've put a first version of my patch for transparency support in the snapscan
  > > > backend on my homepage (http://www.ginko.de/user/oschwartz/snapscan).
  > > >
  > > > Up to now I have only tested it with an Acer ScanPrisa 620UT.
  > > >
  > > > The patch is for sane-1.0.2. It does not work with previous versions.
  > > >
  > > > If you have a Snapscan or Acer Prisa scanner with transparency unit please try
  > > > it and tell me whether it works for you.
  > >
  > > it runs! Thank you very much for your work.
  > >
  > > Only the following appeared:
  > >
  > > On your homepage in the "installation instructions" under "5." should
  > > only be the instruction "make", under "6." "make install", without dot
  > > and slash. This way my system is working correctly.
  >
  > You're right. I've changed it.
  >
  > > I copied "find-scanner" manually, because "make install" and
  > > "tools" haven't been installed.
  >
  > That's true. However, it's a general sane problem. I don't know why find-scanner
  > is not installed by "make install" (anyone?).
  >
  > > Version 1.0.2 don't overwrite existing files in /usr/local/etc/sane.d
  > > and /usr/local/lib/sane. I searched for it a long time, at least
  > > found it and then deleted it manually.
  >
  > Hm... It should leave old configuration files in /usr/local/etc/sane.d but
  > overwrite binaries in /usr/local/lib/sane. The only reasons I can imagine why
  > it didn't work for you is that you had sane 1.0.1 installed. In this case some
  > links in /usr/local/lib/sane are not replaced.

  I had sane 1.0.1 installed.

  > > The scan looks very fine.
  > >
  > > Finally I have three wishes:
  > >
  > > The scanarea can be 21,5 x 29 cm.
  >
  > Are you sure? I found an electronic version of a Snapscan 300 / 600 manual which
  > specifies 203 x 254 mm for transparency mode. I'll add support for
  > model-dependent max. scan areas in the next version of the patch.

  You are right, the TPU covers a smaller area than the base of
  the scanner. I relate to the largest size that is possible for
  contact-prints.

  > > A switch that allows me to choice between negative and positive scan.
  >
  > You should use xsane. It already has a "negative" switch.

  But this doesn't run with the new coolscan-Backend from Andreas
  Rick, I have a "new" Coolscan.

  > > And a little faster scan only by 600 dpi with maximal scan-area in mode
  > > flatbed. A scan with this resolution was running 45 minutes before
  > > xscanimage disapeared suddenly, although only half of the image was
  > > scanned.
  >
  > Hm again... My scanner works fine with this resolution. Is this a new
  > behaviour after applying the patch? Does anybody else have this problem with a
  > SnapScan 600? What kind of SCSI-adapter are you using?

  I found it. If with or without your patch, the result is the same since 1.0.2. My
  233MHz computer has an Adaptec AHA-2940A SCSI-Controller.

  A 600dpi-scan in color and 600dpi-scan in greyscale
  is impossible, because it takes you 10 minutes.

  But I remember of Kevins Mini-Patch "src-0.8.tgz" from Oct 21, 1999.
  I copied the files into 1.0.2, and patched it with your
  snapscantpo.patch. It works normally.

  Karlheinz

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  - Next message: Alain ROTH: "EPSON GT-8000"
  - Previous message: Steve Underwood: "Re: SnapScan"
  - In reply to: Oliver Schwartz: "Re: Transparency support for snapscan backend"
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