sane-agfafocus(5)						File Formats Manual						 sane-agfafocus(5)

NAME

       sane-agfafocus - SANE backend for AGFA Focus flatbed scanners

DESCRIPTION

       The  sane-agfafocus  library  implements  a  SANE (Scanner Access Now Easy) backend that provides access to AGFA Focus flatbed scanners. At
       present, the following scanners are supported 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.

DEVICE NAMES

       This backend expects device names of the form:

	      special

       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.

CONFIGURATION

       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 sample configuration file is shown below:

	      /dev/scanner
	      # this is a comment
	      /dev/sge

FILES

       /etc/sane.d/agfafocus.conf
	      The backend configuration file (see also description of SANE_CONFIG_DIR below).

       /usr/lib/libsane-agfafocus.a
	      The static library implementing this backend.

       /usr/lib/libsane-agfafocus.so
	      The shared library implementing this backend (present on systems that support dynamic loading).

ENVIRONMENT

       SANE_CONFIG_DIR
	      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 configura-
	      tion 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 explic-
	      itly 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).

       SANE_DEBUG_AGFAFOCUS
	      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 values:

	      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

MISSING FUNCTIONALITY

       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.

BUGS

       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)

DEBUG

       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.

TODO

       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 back-
	      end.

SEE ALSO

       sane(7), sane-scsi(5)

AUTHOR

       Ingo Schneider and Karl Anders Oygard.

								    17 Oct 1998 						 sane-agfafocus(5)