sane-project-backends/doc/sane-avision.man

.TH sane-avision 5 "10 Dec 2001"
.IX sane-avision

.SH NAME
sane-avision - SANE backend for Avision (and OEM HP, Minolta) flatbed scanners

.SH ABOUT THIS FILE

This file only is a short descripton of the avision-backend for sane!

.SH DESCRIPTION
The
.B sane-avision
library implements a SANE (Scanner Access Now Easy) backend that
provides access to Avision flatbed scanners and the Avision
OEM scanners labelled with HP and Minolta.

.SH CONFIGURATION

The configuration file for this backend resides in 
	@CONFIGDIR@/avision.conf. 

Its contents is a list of device names that correspond to Avision and Avision
compatible scanners. Empty lines and lines starting with a hash mark (#) are
ignored. A sample configuration file is shown below: 

.B I suggest you hold one hand on the power-button of the scanner while you try
the first scans!

 #scsi Vendor Model Type Bus Channel ID LUN 
 scsi AVISION
 /dev/scanner

 # this is a comment
 #
 option force-a4
 option allow-usb
 option disable-gamma-table
 
 - force-a4:
   Forces the backend to overwrite the scanable area
   returned by the scanner. This might be needed for
   the AV 630 which returns no area - or newer scanners
   which retuns the area in a unkown format our backend
   doesn't recongize yet.
 
 - allow-usb:
   Tells the backend to use USB scanner - which do not
   work correctly yet.

 - disable-gamma-table:
   Disables the usage of the scanner's gamma-table. You
   might try this if your scans hang, or only produces
   random garbage.

.SH "DEVICE NAMES"
This backend expects device names of the form:
.PP
.RS
.I special
.RE
.PP
Where
.I special
is the path-name for the special device that corresponds to a
SCSI scanner. The special device name must be a generic SCSI device or a
symlink to such a device.  The program 
.IR sane-find-scanner 
helps to find out the correct device. Under Linux, such a device name
could be
.I /dev/sga
or
.IR /dev/sge ,
for example.  See sane-scsi(5) for details.

.SH FILES
.TP
.I @CONFIGDIR@/avision.conf
The backend configuration file (see also description of
.B SANE_CONFIG_DIR
below).
.TP
.I @LIBDIR@/libsane-avision.a
The static library implementing this backend.
.TP
.I @LIBDIR@/libsane-avision.so
The shared library implementing this backend (present on systems that
support dynamic loading).

.SH ENVIRONMENT
.TP
.B 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 @CONFIGDIR@.  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
.B SANE_CONFIG_DIR
to "/tmp/config:" would result in directories "tmp/config", ".", and
"@CONFIGDIR@" being searched (in this order).
.TP
.B SANE_DEBUG_AVISION
If the library was compiled with debug support enabled, this
environment variable controls the debug level for this backend.  Higher
debug levels increase the verbosity of the output. 

Example: 
export SANE_DEBUG_AVISION=4

.SH "SEE ALSO"
sane(7), sane\-scsi(5)
.br
http://drocklinux.dyndns.org/rene/avision/index.html

.SH AUTHOR
Ren<EFBFBD> Rebe, Meino Christian Cramer and Martin Jel<65>nek