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<TITLE>sane-devel: A simple scheme to produce arbitrary output formats</TITLE>
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<META NAME="Author" CONTENT="Stefan Illy (stefan.illy@ihm.fzk.de)">
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<META NAME="Subject" CONTENT="A simple scheme to produce arbitrary output formats">
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<H1>A simple scheme to produce arbitrary output formats</H1>
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<!-- received="Tue Aug 15 02:26:00 2000" -->
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<!-- isoreceived="20000815092600" -->
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<!-- sent="Tue, 15 Aug 2000 11:30:11 +0200 (CEST)" -->
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<!-- isosent="20000815093011" -->
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<!-- name="Stefan Illy" -->
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<!-- email="stefan.illy@ihm.fzk.de" -->
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<!-- subject="A simple scheme to produce arbitrary output formats" -->
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<!-- id="14745.3491.849563.564819@ihmgyro5.fzk.de" -->
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<STRONG>From:</STRONG> Stefan Illy (<A HREF="mailto:stefan.illy@ihm.fzk.de?Subject=Re:%20A%20simple%20scheme%20to%20produce%20arbitrary%20output%20formats&In-Reply-To=<14745.3491.849563.564819@ihmgyro5.fzk.de>"><EM>stefan.illy@ihm.fzk.de</EM></A>)<BR>
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<STRONG>Date:</STRONG> Tue Aug 15 2000 - 02:30:11 PDT
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<P>
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<!-- next="start" -->
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<LI><STRONG>Next message:</STRONG> <A HREF="0133.html">Jochen Eisinger: "bug in mustek_pp"</A>
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<UL>
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<LI><STRONG>Previous message:</STRONG> <A HREF="0131.html">Chris Pinkham: "Re: sane-1.0.3 released"</A>
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<LI><STRONG>Next in thread:</STRONG> <A HREF="0160.html">Henning Meier-Geinitz: "Re: A simple scheme to produce arbitrary output formats"</A>
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<LI><STRONG>Reply:</STRONG> <A HREF="0160.html">Henning Meier-Geinitz: "Re: A simple scheme to produce arbitrary output formats"</A>
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<HR NOSHADE><P>
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<!-- body="start" -->
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<P>
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I'm not very happy with the fact that xscanimage can produce only
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<BR>
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pnm-output.
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<BR>
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<P>By adding a couple of lines to xscanimage.c and providing an additional
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<BR>
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shell script I could get easily around this problem.
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<BR>
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<P>My scheme is quite simple:
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<BR>
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<P>The user specifies the requested output format by the suffix of the
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<BR>
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output file (e.g. `output.eps').
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<BR>
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<P>After the fclose() call in xscanimage.c the program will check for the
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<BR>
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SANE_CONVERT environment variable. If it exists it will call the
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<BR>
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program specified in SANE_CONVERT, in my case a shell script called
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<BR>
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`sane-convert'. This program takes one argument, the name of the
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<BR>
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output file and will convert it to the requested format using
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<BR>
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ImageMagick or the netpbm utilities.
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<BR>
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<P>Here are the changes I had to apply to xscanimage.c
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<BR>
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(line 760+, 7 additinoal lines):
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<BR>
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{
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<BR>
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+ char *saneconvert, cmd[2*PATH_MAX];
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<BR>
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fclose (scan_win.out);
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<BR>
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scan_win.out = 0;
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<BR>
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+ if ((saneconvert = getenv("SANE_CONVERT")) != NULL)
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<BR>
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+ {
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<BR>
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+ strcpy(cmd, saneconvert);
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<BR>
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+ strcat(cmd, preferences.filename);
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<BR>
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+ strcat(cmd, " ");
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<BR>
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+ system(cmd);
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<BR>
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}
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<BR>
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}
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<BR>
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<P><P>And this is the sane-convert shell script:
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<BR>
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-------------snip-------------------------
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<BR>
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#!/bin/sh
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<BR>
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#
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<BR>
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# sane-convert: convert a pnm-file generated by xscanimage to a
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<BR>
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# user-specified format
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<BR>
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# (determined by the filename's suffix).
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<BR>
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#
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<BR>
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<P>SCRIPT=`basename $0`
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<BR>
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<P>#
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<BR>
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# Argument checking.
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<BR>
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#
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<BR>
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if [ $# -ne 1 ]; then
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<BR>
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echo "$SCRIPT: invalid number of arguments." 1>&2
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<BR>
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exit 1
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<BR>
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fi
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<BR>
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<P>if [ ! -r $1 ]; then
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<BR>
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echo "$SCRIPT: input file \`$1' is not readable." 1>&2
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<BR>
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exit 2
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<BR>
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fi
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<BR>
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<P>#
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<BR>
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# Input and output filenames.
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<BR>
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#
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<BR>
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INPUT=$1-$$.pnm
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<BR>
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OUTPUT=$1
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<BR>
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<P>#
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<BR>
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# Specification of the conversion filters (CHANGE TO YOUR NEEDS!).
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<BR>
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#
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<BR>
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case $OUTPUT in
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<BR>
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*.p[bgpn]m) echo "$SCRIPT: pnm format, conversion skipped."
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<BR>
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exit 0
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<BR>
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;;
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<BR>
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*.eps) CONVERT="convert $INPUT eps2:$OUTPUT"
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<BR>
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;;
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<BR>
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*.ps) CONVERT="convert -page A4 -border 36x36 -bordercolor white \
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<BR>
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-rotate -90\> $INPUT ps2:$OUTPUT"
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<BR>
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;;
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<BR>
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*.jpg) CONVERT="cjpeg -quality 75 < $INPUT > $OUTPUT"
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<BR>
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;;
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<BR>
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*) CONVERT="convert $INPUT $OUTPUT"
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<BR>
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;;
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<BR>
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esac
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<BR>
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<P>echo "$SCRIPT: running \`$CONVERT'..."
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<BR>
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<P>#
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<BR>
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# The converstion step.
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<BR>
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#
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<BR>
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mv $OUTPUT $INPUT && sh -c "$CONVERT"
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<BR>
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if [ $? -eq 0 ]; then
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<BR>
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echo "$SCRIPT: conversion completed successfully."
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<BR>
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else
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<BR>
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echo "$SCRIPT: conversion failed."
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<BR>
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fi
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<BR>
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<P>#
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<BR>
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# Deleting the input file.
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<BR>
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#
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<BR>
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rm $INPUT
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<BR>
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-------------snip-------------------------
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<BR>
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<P>What do you think of this concept?
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<BR>
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<P>Maybe it is a candidate for sane-1.0.4?
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<BR>
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<P><P>Best regards,
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<BR>
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<P>Stefan
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<BR>
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<P><P><PRE>
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--
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Stefan Illy | Institut fuer Hochleistungsimpuls-
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| und Mikrowellentechnik (IHM)
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e-mail: <A HREF="mailto:stefan.illy@ihm.fzk.de?Subject=Re:%20A%20simple%20scheme%20to%20produce%20arbitrary%20output%20formats&In-Reply-To=<14745.3491.849563.564819@ihmgyro5.fzk.de>">stefan.illy@ihm.fzk.de</A> | Forschungszentrum Karlsruhe GmbH
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phone: (+49) 07247/82-4165 | Postfach 3640
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fax: (+49) 07247/82-4874 | D-76021 Karlsruhe, Germany
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<P><P>--
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Source code, list archive, and docs: <A HREF="http://www.mostang.com/sane/">http://www.mostang.com/sane/</A>
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To unsubscribe: echo unsubscribe sane-devel | mail <A HREF="mailto:majordomo@mostang.com?Subject=Re:%20A%20simple%20scheme%20to%20produce%20arbitrary%20output%20formats&In-Reply-To=<14745.3491.849563.564819@ihmgyro5.fzk.de>">majordomo@mostang.com</A>
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</PRE>
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<P><!-- body="end" -->
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<HR NOSHADE>
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<UL>
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<!-- next="start" -->
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<LI><STRONG>Next message:</STRONG> <A HREF="0133.html">Jochen Eisinger: "bug in mustek_pp"</A>
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<LI><STRONG>Previous message:</STRONG> <A HREF="0131.html">Chris Pinkham: "Re: sane-1.0.3 released"</A>
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<!-- nextthread="start" -->
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<LI><STRONG>Next in thread:</STRONG> <A HREF="0160.html">Henning Meier-Geinitz: "Re: A simple scheme to produce arbitrary output formats"</A>
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<LI><STRONG>Reply:</STRONG> <A HREF="0160.html">Henning Meier-Geinitz: "Re: A simple scheme to produce arbitrary output formats"</A>
|
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<!-- reply="end" -->
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<SMALL>
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<EM>
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This archive was generated by <A HREF="http://www.hypermail.org/">hypermail 2b29</A>
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: <EM>Tue Aug 15 2000 - 02:28:00 PDT</EM>
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