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147 wiersze
6.0 KiB
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<HTML>
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<TITLE>sane-pint.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-pint.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-pint.5.html">sane-pint(5)</A></B> SANE Scanner Access Now Easy <B><A HREF="sane-pint.5.html">sane-pint(5)</A></B>
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</PRE>
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<H2>NAME</H2><PRE>
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sane-pint - SANE backend for scanners that use the PINT device driver
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</PRE>
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<H2>DESCRIPTION</H2><PRE>
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The <B>sane-pint</B> library implements a SANE (Scanner Access Now Easy) back-
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end that provides generic access to hand-held and flatbed scanners
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using the PINT (PINT Is Not Twain) device driver. The PINT driver is
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being actively developed on the OpenBSD platform, and has been ported
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to a few other *NIX-like operating systems.
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PINT is designed to provide an <B><A HREF="ioctl.2.html">ioctl(2)</A></B> interface to many different
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scanner types. However, this backend has only been tested with flatbed
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single-pass scanners, and more work will probably be required to get it
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to use other scanner types successfully.
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If have successfully used the PINT driver with your scanner, but it
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does not work using this SANE backend, please let us know. To do this,
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send a mail with the relevant information for your scanner to
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<I>sane-devel@alioth-lists.debian.net</I>. Have a look at
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<I>http://www.sane-project.org/mailing-lists.html</I> concerning subscription
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to sane-devel.
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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 UNIX path-name for the special device that corre-
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sponds to the scanner. The special device name must be a PINT device
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or a symlink to such a device. For example, under NetBSD or OpenBSD,
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such a device name could be <I>/dev/ss0</I> or <I>/dev/scan0</I>.
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</PRE>
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<H2>CONFIGURATION</H2><PRE>
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The contents of the <I>pint.conf</I>. file is a list of device names that
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correspond to PINT scanners. Empty lines and lines starting with a
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hash mark (#) are ignored. A sample configuration file is shown below:
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/dev/scanner
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# this is a comment
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/dev/ss1
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</PRE>
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<H2>FILES</H2><PRE>
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<I>/usr/local/etc/sane.d/pint.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-pint.a</I>
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The static library implementing this backend.
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<I>/usr/local/lib/sane/libsane-pint.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>, <B>.</B>, and
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<I>/usr/local/etc/sane.d</I> being searched (in this order).
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<B>SANE_DEBUG_PINT</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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E.g., a value of 128 requests all debug output to be printed.
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Smaller levels reduce verbosity.
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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>
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</PRE>
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<H2>AUTHOR</H2><PRE>
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Gordon Matzigkeit, adapted from existing backends written by David Mos-
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berger.
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</PRE>
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<H2>BUGS</H2><PRE>
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There are minor roundoff errors when adjusting the ranges, since PINT
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uses units of 1/1200 of an inch, and SANE normally uses millimeters.
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Symptoms of these errors are skewed images. This should really be
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fixed (no pun intended) as soon as possible, but I just don't know/care
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enough about fixed-point representation and roundoff errors to do this
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correctly. Workaround: use inches as the scanning unit, and everything
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usually works fine.
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The PINT 0.5e interface does not provide a way to determine valid
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ranges for DPI, modes, and scan sizes. So, the SANE backend queries
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the PINT device, and dynamically discovers valid ranges by doing a
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binary search. This means that the driver takes longer to initialize
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than seems necessary.
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Resetting the scanner does not seem to work (at least not on my HP
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ScanJet 4p). For that reason, the driver sends a SCIOCRESTART, then
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gobbles up any remaining input until it hits EOF.
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Not all of the scanners have been identified (i.e. whether they are
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flatbed or handheld).
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X and Y resolutions are assumed to be the same.
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No testing has been done on three-pass or handheld scanners, or with
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Automatic Document Feeder support.
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14 Jul 2008 <B><A HREF="sane-pint.5.html">sane-pint(5)</A></B>
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</PRE>
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<HR>
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<ADDRESS>
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