1#! /bin/sh 2# 3# grap2graph -- compile graph description descriptions to bitmap images 4# 5# by Eric S. Raymond <esr@thyrsus.com>, May 2003 6# 7# In Unixland, the magic is in knowing what to string together... 8# 9# Take grap description on stdin, emit cropped bitmap on stdout. 10# The pic markup should *not* be wrapped in .G1/.G2, this script will do that. 11# A -U option on the command line enables gpic/groff "unsafe" mode. 12# A -format FOO option changes the image output format to any format 13# supported by convert(1). All other options are passed to convert(1). 14# The default format is PNG. 15# 16 17# Requires the groff suite and the ImageMagick tools. Both are open source. 18# This code is released to the public domain. 19# 20# Here are the assumptions behind the option processing: 21# 22# 1. None of the options of grap(1) are relevant. 23# 24# 2. Only the -U option of groff(1) is relevant. 25# 26# 3. Many options of convert(1) are potentially relevant, (especially 27# -density, -interlace, -transparency, -border, and -comment). 28# 29# Thus, we pass -U to groff(1), and everything else to convert(1). 30# 31# $Id: grap2graph.sh,v 1.4 2005/05/18 07:03:06 wl Exp $ 32# 33groff_opts="" 34convert_opts="" 35format="png" 36 37while [ "$1" ] 38do 39 case $1 in 40 -unsafe) 41 groff_opts="-U";; 42 -format) 43 format=$2 44 shift;; 45 -v | --version) 46 echo "GNU grap2graph (groff) version @VERSION@" 47 exit 0;; 48 --help) 49 echo "usage: grap2graph [ option ...] < in > out" 50 exit 0;; 51 *) 52 convert_opts="$convert_opts $1";; 53 esac 54 shift 55done 56 57# create temporary directory 58tmp= 59for d in "$GROFF_TMPDIR" "$TMPDIR" "$TMP" "$TEMP" /tmp; do 60 test -z "$d" && continue 61 62 tmp=`(umask 077 && mktemp -d -q "$d/grap2graph-XXXXXX") 2> /dev/null` \ 63 && test -n "$tmp" && test -d "$tmp" \ 64 && break 65 66 tmp=$d/grap2graph$$-$RANDOM 67 (umask 077 && mkdir $tmp) 2> /dev/null && break 68done; 69if test -z "$tmp"; then 70 echo "$0: cannot create temporary directory" >&2 71 { (exit 1); exit 1; } 72fi 73 74trap 'exit_status=$?; rm -rf $tmp && exit $exit_status' 0 2 15 75 76# Here goes: 77# 1. Add .G1/.G2. 78# 2. Process through grap(1) to emit pic markup. 79# 3. Process through groff(1) with pic preprocessing to emit Postscript. 80# 4. Use convert(1) to crop the Postscript and turn it into a bitmap. 81(echo ".G1"; cat; echo ".G2") | grap | groff -p $groff_opts -Tps -P-pletter | \ 82 convert -trim -crop 0x0 $convert_opts - $tmp/grap2graph.$format \ 83 && cat $tmp/grap2graph.$format 84 85# End 86