kopia lustrzana https://gitlab.com/sane-project/backends
121 wiersze
4.5 KiB
Groff
121 wiersze
4.5 KiB
Groff
.TH sane\-hs2p 5 "13 Jul 2008" "@PACKAGEVERSION@" "SANE Scanner Access Now Easy"
|
|
.IX sane\-hs2p
|
|
.SH NAME
|
|
sane\-hs2p \- SANE backend for Ricoh SCSI flatbed/ADF scanners
|
|
.SH DESCRIPTION
|
|
The
|
|
.B sane\-hs2p
|
|
library implements a SANE (Scanner Access Now Easy) backend that provides
|
|
access to the Ricoh IS450 family of scanners. Should also work with the IS420,
|
|
IS410, and IS430 scanners, but these are untested.
|
|
Please contact the maintainer or the sane\-devel mailing list if you own such a scanner.
|
|
.PP
|
|
This backend is alpha-quality. It may have bugs and some scanners haven't been
|
|
tested at all. Be careful and pull the plug if the scanner causes unusual
|
|
noise.
|
|
|
|
.SH "DEVICE NAMES"
|
|
This backend expects device names of the form:
|
|
.PP
|
|
.RS
|
|
.I special
|
|
.RE
|
|
.PP
|
|
Where
|
|
.I special
|
|
is either the path-name for the special device that corresponds to a SCSI
|
|
scanner. The program
|
|
.I sane\-find\-scanner
|
|
helps to find out the correct device. Under Linux, such a device name could be
|
|
.I /dev/sg0
|
|
or
|
|
.IR /dev/sga ,
|
|
for example. See
|
|
.BR sane\-scsi (5)
|
|
for details.
|
|
|
|
.SH CONFIGURATION
|
|
The contents of the
|
|
.I hs2p.conf
|
|
file is a list of device names that correspond to SCSI
|
|
scanners. Empty lines and lines starting with a hash mark (#) are
|
|
ignored. See
|
|
.BR sane\-scsi (5)
|
|
on details of what constitutes a valid device name.
|
|
|
|
.SH FILES
|
|
.TP
|
|
.I @CONFIGDIR@/hs2p.conf
|
|
The backend configuration file (see also description of
|
|
.B SANE_CONFIG_DIR
|
|
below).
|
|
.TP
|
|
.I @LIBDIR@/libsane\-hs2p.a
|
|
The static library implementing this backend.
|
|
.TP
|
|
.I @LIBDIR@/libsane\-hs2p.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_HS2P
|
|
If the library was compiled with debug support enabled, this
|
|
environment variable controls the debug level for this backend.
|
|
A value of 255 prints all debug output. Smaller values reduce verbosity.
|
|
|
|
.SH CURRENT STATUS
|
|
The hs2p backend is now in version 1.00. All major scanning-related features
|
|
are supported, except for those features requiring the optional IPU. Scanning
|
|
from the flatbed or ADF (either simplex or duplex) is supported. Lineart,
|
|
halftone, 4-bit gray, and 8-bit gray are supported. Pre-set gamma tables and
|
|
halftone patterns are supported, as well as brightness, threshold, contrast.
|
|
Also supported is scan wait mode, binary and gray filtering, negative scanning,
|
|
and absolute or relative white setting. Printing with the optional endorser
|
|
also is supported.
|
|
|
|
.SH PLANNED FUNCTIONALITY
|
|
This scanner can scan from the ADF in continuous simplex mode.
|
|
Surprisingly, many scanners scan an entire document from the ADF
|
|
into memory before ejecting the sheet. Thus if the document is too
|
|
long, the scanner cannot hold the entire image data in memory.
|
|
But if the scanner would send its image data when its memory got full,
|
|
and then read the next buffer's worth of data, continuous scanning
|
|
could be achieved.
|
|
|
|
.SH MISSING FUNCTIONALITY
|
|
The SCSI commands for uploading (2AH) or downloading (28H)
|
|
custom halftone patterns (02H) and gamma vectors (03H) should work,
|
|
but require implementing the SANE Option-Value code to allow the
|
|
user to create the tables to be uploaded to the scanner. No support
|
|
for Maintenance Data (80H) is planned as this functionality is more
|
|
suited to a stand-alone utility to be used by a technician when
|
|
replacing the lamp or ADF unit. Nor is support for reading or changing
|
|
IPU (93H) parameters and adjustments planned, since my IS450 lacks
|
|
such a unit. The 31-byte Auto Photo/Letter struct and 21-byte Dynamic
|
|
threshold struct are documented in the hs2p-scsi.h file should someone
|
|
wish to use their IPU for image data processing.
|
|
|
|
.SH "SEE ALSO"
|
|
.BR sane (7),
|
|
.BR sane\-find\-scanner (1),
|
|
.BR sane\-scsi (5),
|
|
|
|
.SH AUTHOR
|
|
jeremy <jeremy@acjlaw.net>
|
|
.br
|
|
Maintained by Jeremy Johnson <jeremy@acjlaw.net>
|