sane-agfafocus.5



sane-agfafocus(5)        SANE Scanner Access Now Easy        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@alioth-lists.debian.net.
       Have  a look at http://www.sane-project.org/mailing-lists.html concern-
       ing 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 cor-
       responds 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 be-
       low:

              /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 config-
              uration file is searched in two default directories: first,  the
              current   working   directory   (".")   and   then  in  /usr/lo-
              cal/etc/sane.d.  If the value of the environment  variable  ends
              with  the directory separator character, then the default direc-
              tories are searched after the explicitly specified  directories.
              For example, setting SANE_CONFIG_DIR to "/tmp/config:" would re-
              sult in directories tmp/config, ., and /usr/local/etc/sane.d be-
              ing searched (in this order).

       SANE_DEBUG_AGFAFOCUS
              If the library was compiled with debug support enabled, this en-
              vironment 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 information
               6       print less important information
               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 a terminal 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_DE-
       BUG_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  scan-
              ners.   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  sup-
              port 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 compli-
              ant backend.


SEE ALSO

       sane(7), sane-scsi(5)


AUTHOR

       Ingo Schneider and Karl Anders Oygard.

                                  10 Jul 2008                sane-agfafocus(5)

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