sane-agfafocus - SANE backend for AGFA Focus flatbed scanners
The sane-agfafocus library implements a SANE (Scanner Access Now Easy) backend that pro-
vides access to AGFA Focus flatbed scanners. At present, the following scanners are sup-
ported 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
firstname.lastname@example.org. 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.
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 sam-
ple configuration file is shown below:
# 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
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 val-
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.
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
The AGFA HORIZON scanners are SCSI-2 scanners, and it would probably be easier to
support these scanners in a SCSI-2 compliant backend.
Ingo Schneider and Karl Anders Oygard.
17 Oct 1998 sane-agfafocus(5)