#!/bin/sh

topdir="`dirname "$0"`"; topdir="`cd "$topdir/.."; pwd`"
"$topdir/doclib/dot-munge.pl" "$1"

case "$2" in
    -Tpng:gd)
	first="$1"; shift; shift
	set -- "$first" "-Tpng" "$@"
	;;
    *)
esac

set -e

dot "$@"

case "$4" in
    *.png)
	if [ -r "$4" ]; then
	    size="`pngtopnm "$4" | sed -n -e '2p'`"
	    width_a="${size% *}"
	    height_a="${size#* }"
	    if [ $width_a -gt 800 ]; then
		for file in "${1%.dot}".*; do
		    cp "$file" "$file.a"
		done
		sed -e 's/rankdir=LR/rankdir=TB/' -e t -e 's/rankdir=TB/rankdir=LR/' "$1.a" > "$1"
		dot "$@"
		size="`pngtopnm "$4" | sed -n -e '2p'`"
		width_b="${size% *}"
		height_b="${size#* }"
		if [ $width_a -lt $width_b ]; then
		    for file in "${1%.dot}".*.a; do
			mv "$file" "${file%.a}"
		    done
		else
		    rm "${1%.dot}".*.a
		fi
	    fi
	fi
	;;
    *)  ;;
esac