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       sane-agfafocus - SANE backend for AGFA Focus flatbed scanners


       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

       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
       Have    a    look   at
       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


       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 sample configuration file is shown

              # 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 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


       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 Øygard.

                                  10 Jul 2008                sane-agfafocus(5)