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@lists.alioth.debian.org.
       Have a look at http://www.sane-project.org/mailing-lists.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
              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).

       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 backend.

SEE ALSO
       sane(7), sane-scsi(5)


AUTHOR
       Ingo Schneider and Karl Anders Oygard.




                                  10 Jul 2008                sane-agfafocus(5)
