1151497Sru#! /bin/sh 2151497Sru# 3151497Sru# grap2graph -- compile graph description descriptions to bitmap images 4151497Sru# 5151497Sru# by Eric S. Raymond <esr@thyrsus.com>, May 2003 6151497Sru# 7151497Sru# In Unixland, the magic is in knowing what to string together... 8151497Sru# 9151497Sru# Take grap description on stdin, emit cropped bitmap on stdout. 10151497Sru# The pic markup should *not* be wrapped in .G1/.G2, this script will do that. 11151497Sru# A -U option on the command line enables gpic/groff "unsafe" mode. 12151497Sru# A -format FOO option changes the image output format to any format 13151497Sru# supported by convert(1). All other options are passed to convert(1). 14151497Sru# The default format is PNG. 15151497Sru# 16151497Sru 17151497Sru# Requires the groff suite and the ImageMagick tools. Both are open source. 18151497Sru# This code is released to the public domain. 19151497Sru# 20151497Sru# Here are the assumptions behind the option processing: 21151497Sru# 22151497Sru# 1. None of the options of grap(1) are relevant. 23151497Sru# 24151497Sru# 2. Only the -U option of groff(1) is relevant. 25151497Sru# 26151497Sru# 3. Many options of convert(1) are potentially relevant, (especially 27151497Sru# -density, -interlace, -transparency, -border, and -comment). 28151497Sru# 29151497Sru# Thus, we pass -U to groff(1), and everything else to convert(1). 30151497Sru# 31151497Sru# $Id: grap2graph.sh,v 1.4 2005/05/18 07:03:06 wl Exp $ 32151497Sru# 33151497Srugroff_opts="" 34151497Sruconvert_opts="" 35151497Sruformat="png" 36151497Sru 37151497Sruwhile [ "$1" ] 38151497Srudo 39151497Sru case $1 in 40151497Sru -unsafe) 41151497Sru groff_opts="-U";; 42151497Sru -format) 43151497Sru format=$2 44151497Sru shift;; 45151497Sru -v | --version) 46151497Sru echo "GNU grap2graph (groff) version @VERSION@" 47151497Sru exit 0;; 48151497Sru --help) 49151497Sru echo "usage: grap2graph [ option ...] < in > out" 50151497Sru exit 0;; 51151497Sru *) 52151497Sru convert_opts="$convert_opts $1";; 53151497Sru esac 54151497Sru shift 55151497Srudone 56151497Sru 57151497Sru# create temporary directory 58151497Srutmp= 59151497Srufor d in "$GROFF_TMPDIR" "$TMPDIR" "$TMP" "$TEMP" /tmp; do 60151497Sru test -z "$d" && continue 61151497Sru 62151497Sru tmp=`(umask 077 && mktemp -d -q "$d/grap2graph-XXXXXX") 2> /dev/null` \ 63151497Sru && test -n "$tmp" && test -d "$tmp" \ 64151497Sru && break 65151497Sru 66151497Sru tmp=$d/grap2graph$$-$RANDOM 67151497Sru (umask 077 && mkdir $tmp) 2> /dev/null && break 68151497Srudone; 69151497Sruif test -z "$tmp"; then 70151497Sru echo "$0: cannot create temporary directory" >&2 71151497Sru { (exit 1); exit 1; } 72151497Srufi 73151497Sru 74151497Srutrap 'exit_status=$?; rm -rf $tmp && exit $exit_status' 0 2 15 75151497Sru 76151497Sru# Here goes: 77151497Sru# 1. Add .G1/.G2. 78151497Sru# 2. Process through grap(1) to emit pic markup. 79151497Sru# 3. Process through groff(1) with pic preprocessing to emit Postscript. 80151497Sru# 4. Use convert(1) to crop the Postscript and turn it into a bitmap. 81151497Sru(echo ".G1"; cat; echo ".G2") | grap | groff -p $groff_opts -Tps -P-pletter | \ 82151497Sru convert -trim -crop 0x0 $convert_opts - $tmp/grap2graph.$format \ 83151497Sru && cat $tmp/grap2graph.$format 84151497Sru 85151497Sru# End 86