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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	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 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.  On *NIX systems, the	direc-
	      tories are separated by a	colon (`:'), under OS/2, they are sep-
	      arated  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 /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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