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sane-agfafocus(5)								sane-agfafocus(5)

       sane-agfafocus - SANE backend for AGFA Focus flatbed scanners

       The  sane-agfafocus  library implements a SANE (Scanner Access Now Easy) backend that pro-
       vides access to AGFA Focus flatbed scanners. At present, the following scanners	are  sup-
       ported from this backend:

	      AGFA Focus GS Scanner (6 bit gray scale) (untested)
	      AGFA Focus Lineart Scanner (lineart) (untested)
	      AGFA Focus II (8 bit gray scale) (untested)
	      AGFA Focus Color (24 bit color 3-pass)
	      AGFA Focus Color Plus (24 bit color 3-pass)

	      Siemens S9036 (8 bit gray scale) (untested)

       The driver supports line art, 6bpp and 8bpp gray, 18bpp and 24bpp color scans.

       If you own a scanner other than the ones listed above that works with this backend, please
       let us know by sending the scanner's  model  name,  SCSI  id,  and  firmware  revision  to
       sane-devel@mostang.com.	 Have  a look at http://www.mostang.com/sane/mail.html concerning
       subscription to sane-devel.

       All of these scanners are pre-SCSI-2, and do not even report  properly  to  SCSI  Inquiry.
       This  is  typically  evident  in  SCSI bus scans, where the scanner will come up with only
       garbage as vendor and models strings.

       This backend expects device names of the form:


       Where special is either the path-name for the special device that corresponds  to  a  SCSI
       scanner.  For  SCSI  scanners,  the special device name must be a generic SCSI device or a
       symlink to such a device.  Under Linux, such a device name could be /dev/sga or	/dev/sge,
       for example.  See sane-scsi(5) for details.

       The  contents of the agfafocus.conf file is a list of device names that correspond to AGFA
       Focus scanners.	Empty lines and lines starting with a hash mark (#) are ignored.  A  sam-
       ple configuration file is shown below:

	      # this is a comment

	      The backend configuration file (see also description of SANE_CONFIG_DIR below).

	      The static library implementing this backend.

	      The  shared  library  implementing  this	backend  (present on systems that support
	      dynamic loading).

	      This environment variable specifies the list of directories that	may  contain  the
	      configuration  file.   Under  UNIX, the directories are separated by a colon (`:'),
	      under OS/2, they are separated by a semi-colon (`;').  If this variable is not set,
	      the  configuration  file is searched in two default directories: first, the current
	      working directory (".") and then in /etc/sane.d.	If the value of  the  environment
	      variable	ends with the directory separator character, then the default directories
	      are searched after the explicitly  specified  directories.   For	example,  setting
	      SANE_CONFIG_DIR  to  "/tmp/config:"  would result in directories "tmp/config", ".",
	      and "/etc/sane.d" being searched (in this order).

	      If the library was compiled with debug support enabled, this  environment  variable
	      controls	the debug level for this backend. E.g., a value of 128 requests all debug
	      output to be printed. Smaller levels reduce verbosity.   SANE_DEBUG_AGFAFOCUS  val-

	      Number  Remark

	       0       print important errors (printed each time)
	       1       print errors
	       2       print sense
	       3       print warnings
	       4       print scanner-inquiry
	       5       print informations
	       6       print less important informations
	       7       print called procedures
	       8       print reader_process messages
	       10      print called sane-init-routines
	       11      print called sane-procedures
	       12      print sane infos
	       13      print sane option-control messages

       Uploading  of  dither  matrices	and  tonecurves  has been implemented, but so far has not
       proven to be useful for anything.  For this reason these options have been disabled.

       The scanners that do not support disconnect have problems with SCSI timeouts if	the  SCSI
       bus  gets  loaded,  eg.	if you do a kernel build at the same time as scanning.	To see if
       your scanner supports disconnect, run "SANE_DEBUG_AGFAFOCUS=128 scanimage -L"  in  sh  and
       look for the "disconnect:" line)

       If  you have problems with SANE not detecting your scanner, make sure the Artec backend is
       disabled.  Somehow, this backend causes at least my scanner not to  respond  correctly  to
       SCSI inquiry commands.

       If you encounter a bug please set the environment variable SANE_DEBUG_AGFAFOCUS to 128 and
       try to regenerate the problem. Then send me a report with the log attached.

       If you encounter a SCSI bus error or trimmed and/or displaced images please also  set  the
       environment variable SANE_DEBUG_SANEI_SCSI to 128 before sending me the report.

       More scanners?

	      The  AGFA  ACS  and  ARCUS  scanners are similar to the FOCUS scanners.  The driver
	      could probably be extended to support these scanners without too many  changes.	I
	      do  not  have  access to such scanners, and cannot add support for it.  However, if
	      you are in possession of such a scanner, I could be helpful in adding  support  for
	      these scanners.

	      The  AGFA  HORIZON scanners are SCSI-2 scanners, and it would probably be easier to
	      support these scanners in a SCSI-2 compliant backend.

       sane(7), sane-scsi(5)

       Ingo Schneider and Karl Anders Oygard.

					   17 Oct 1998				sane-agfafocus(5)
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