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# 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@lists.alioth.debian.org.
           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
           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 config-
                  uration 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  sepa-
                  rator 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  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 ?ygard.

    sane-backends 1.0.12-cvs          17 Oct 1998                sane-agfafocus(5)