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145 wiersze
6.3 KiB
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<HTML>
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<TITLE>sane-hs2p.5</TITLE>
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<BODY BGCOLOR=#FFFFFF TEXT=#000000><H1 ALIGN=CENTER><IMG SRC="/images/sane.png" HEIGHT=117 WIDTH=346></H1>
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<H1>sane-hs2p.5</H1>
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<HR>
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<PRE>
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<!-- Manpage converted by man2html 3.0.1 -->
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<B><A HREF="sane-hs2p.5.html">sane-hs2p(5)</A></B> SANE Scanner Access Now Easy <B><A HREF="sane-hs2p.5.html">sane-hs2p(5)</A></B>
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</PRE>
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<H2>NAME</H2><PRE>
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sane-hs2p - SANE backend for Ricoh SCSI flatbed/ADF scanners
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</PRE>
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<H2>DESCRIPTION</H2><PRE>
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The <B>sane-hs2p</B> library implements a SANE (Scanner Access Now Easy) back-
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end that provides access to the Ricoh IS450 family of scanners. Should
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also work with the IS420, IS410, and IS430 scanners, but these are
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untested. Please contact the maintainer or the sane-devel mailing list
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if you own such a scanner.
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This backend is alpha-quality. It may have bugs and some scanners
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haven't been tested at all. Be careful and pull the plug if the scanner
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causes unusual noise.
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</PRE>
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<H2>DEVICE NAMES</H2><PRE>
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This backend expects device names of the form:
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<I>special</I>
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Where <I>special</I> is the path-name for the special device that corresponds
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to a SCSI scanner. The program <B><A HREF="sane-find-scanner.1.html">sane-find-scanner(1)</A></B> helps to find out
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the correct device. Under Linux, such a device name could be <I>/dev/sg0</I>
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or <I>/dev/sga</I>, for example. See <B><A HREF="sane-scsi.5.html">sane-scsi(5)</A></B> for details.
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</PRE>
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<H2>CONFIGURATION</H2><PRE>
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The contents of the <I>hs2p.conf</I> file is a list of device names that cor-
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respond to SCSI scanners. Empty lines and lines starting with a hash
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mark (#) are ignored. See <B><A HREF="sane-scsi.5.html">sane-scsi(5)</A></B> on details of what constitutes
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a valid device name.
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</PRE>
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<H2>FILES</H2><PRE>
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<I>/usr/local/etc/sane.d/hs2p.conf</I>
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The backend configuration file (see also description of
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<B>SANE_CONFIG_DIR</B> below).
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<I>/usr/local/lib/sane/libsane-hs2p.a</I>
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The static library implementing this backend.
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<I>/usr/local/lib/sane/libsane-hs2p.so</I>
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The shared library implementing this backend (present on systems
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that support dynamic loading).
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</PRE>
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<H2>ENVIRONMENT</H2><PRE>
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<B>SANE_CONFIG_DIR</B>
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This environment variable specifies the list of directories that
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may contain the configuration file. On *NIX systems, the direc-
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tories are separated by a colon (`:'), under OS/2, they are sep-
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arated by a semi-colon (`;'). If this variable is not set, the
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configuration file is searched in two default directories:
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first, the current working directory (".") and then in
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<I>/usr/local/etc/sane.d</I>. If the value of the environment variable
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ends with the directory separator character, then the default
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directories are searched after the explicitly specified directo-
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ries. For example, setting <B>SANE_CONFIG_DIR</B> to "/tmp/config:"
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would result in directories <I>tmp/config</I>, <I>.</I>, and
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<I>/usr/local/etc/sane.d</I> being searched (in this order).
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<B>SANE_DEBUG_HS2P</B>
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If the library was compiled with debug support enabled, this
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environment variable controls the debug level for this backend.
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A value of 255 prints all debug output. Smaller values reduce
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verbosity.
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</PRE>
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<H2>CURRENT STATUS</H2><PRE>
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The <B>sane-hs2p</B> backend is now in version 1.00. All major scanning-
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related features are supported, except for those features requiring the
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optional IPU. Scanning from the flatbed or ADF (either simplex or
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duplex) is supported. Lineart, halftone, 4-bit gray, and 8-bit gray are
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supported. Pre-set gamma tables and halftone patterns are supported, as
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well as brightness, threshold, contrast. Also supported is scan wait
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mode, binary and gray filtering, negative scanning, and absolute or
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relative white setting. Printing with the optional endorser also is
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supported.
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</PRE>
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<H2>PLANNED FUNCTIONALITY</H2><PRE>
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This scanner can scan from the ADF in continuous simplex mode. Sur-
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prisingly, many scanners scan an entire document from the ADF into mem-
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ory before ejecting the sheet. Thus if the document is too long, the
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scanner cannot hold the entire image data in memory. But if the scan-
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ner would send its image data when its memory got full, and then read
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the next buffer's worth of data, continuous scanning could be achieved.
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</PRE>
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<H2>MISSING FUNCTIONALITY</H2><PRE>
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The SCSI commands for uploading (2AH) or downloading (28H) custom
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halftone patterns (02H) and gamma vectors (03H) should work, but
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require implementing the SANE Option-Value code to allow the user to
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create the tables to be uploaded to the scanner. No support for Mainte-
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nance Data (80H) is planned as this functionality is more suited to a
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stand-alone utility to be used by a technician when replacing the lamp
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or ADF unit. Nor is support for reading or changing IPU (93H) parame-
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ters and adjustments planned, since my IS450 lacks such a unit. The
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31-byte Auto Photo/Letter struct and 21-byte Dynamic threshold struct
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are documented in the <I>hs2p-scsi.h</I> file should someone wish to use their
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IPU for image data processing.
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</PRE>
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<H2>SEE ALSO</H2><PRE>
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<B><A HREF="sane.7.html">sane(7)</A></B>, <B><A HREF="sane-find-scanner.1.html">sane-find-scanner(1)</A></B>, <B><A HREF="sane-scsi.5.html">sane-scsi(5)</A></B>,
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</PRE>
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<H2>AUTHOR</H2><PRE>
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jeremy <<I>jeremy@acjlaw.net</I>>
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Maintained by Jeremy Johnson <<I>jeremy@acjlaw.net</I>>
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13 Jul 2008 <B><A HREF="sane-hs2p.5.html">sane-hs2p(5)</A></B>
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</PRE>
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