#!/bin/bash

PROGNAME=`basename $0` || exit 1
QUIET=0
DEBUG=0

function debug {
        if [ "$DEBUG" = "1" ]; then echo "${PROGNAME}:debug:$1" 1>&2; fi
}

function warning {
        if [ "$QUIET" = "0" ]; then echo "${PROGNAME}:warning:$1" 1>&2; fi
}

TMPDIR=

function cleanup {
        debug "cleanup called, arg=$1"
        trap - EXIT HUP INT TERM ERR
        if [ "$TMPDIR" != "" -a -d "$TMPDIR" ]; then
                debug "removing $TMPDIR"
                rm -f -r $TMPDIR
        fi
        exit $1
}

function fatal {
        echo "${PROGNAME}:${1:-"unknown error"}" 1>&2
        cleanup 1
}

function sig_handler_HUPINTTERM {
        fatal "cought HUP, INT or TERM signal, exiting"
}

function sig_handler_ERR {
        cleanup 1
}

function sig_handler_EXIT {
        cleanup 0
}

trap sig_handler_HUPINTTERM HUP INT TERM
trap sig_handler_ERR ERR 
trap sig_handler_EXIT EXIT

TMPDIR=`mktemp -d -p /tmp .$PROGNAME.XXXXXX`

if [ ! -f ./head.tex ]; then
	echo "required file ./head.tex missing"
	exit 1
fi
#if [ ! -x ./gif2rgb ]; then
#	echo "required file ./gif2rgb missing"
#	exit 1
#fi
#if [ ! -x ./convert ]; then
#	echo "required file ./convert missing"
#	exit 1
#fi
if [ -f ./out.tex ]; then
	echo "tempfile existing, will not overwrite"
	exit 1
fi
if [ -f ./out.pdf ]; then
	echo "outputfile existing, will not overwrite"
	exit 1
fi
cat ./head.tex > $TMPDIR/out.tex
for i in "$@"; do
	NAME=${i%.}
	NAME=${NAME%.gif}
	BNAME=`basename "$NAME"`
	if ! file "$i" | grep -e ": GIF image data" > /dev/null; then
		echo $i is not a .gif file
		exit 1
	fi
	RES=`file "$i" | sed "s/^.*, \([[:digit:]]\+\) x \([[:digit:]]\+\)\$/\1 \2/"`
	echo P6 > "$TMPDIR/$BNAME.pnm"
	echo $RES >> "$TMPDIR/$BNAME.pnm"
	echo 255 >> "$TMPDIR/$BNAME.pnm"
	#./gif2rgb "$i" >> "$TMPDIR/$BNAME.pnm"
	#pnmtopng "$TMPDIR/$BNAME.pnm" > "$TMPDIR/$BNAME.png" 2> /dev/null
	convert "$i" $TMPDIR/$BNAME.png
	#rm "$TMPDIR/$BNAME.pnm"
	echo "\\page{$BNAME.png}" >> $TMPDIR/out.tex
done
echo "\\bye" >> $TMPDIR/out.tex
OLDDIR=$PWD
cd $TMPDIR
pdftex out.tex
cp out.pdf $OLDDIR/out.pdf
#rm out.tex