#!/bin/sh
#
# X window dump to PNG
#

DESTDIR=~/tmp

n=1
while :; do
    if [ -f ${DESTDIR}/snapshot$(printf "%03d" $n).png ]; then
	n=$(($n + 1))
    else
	break
    fi
done
file=${DESTDIR}/snapshot$(printf "%03d" $n).png
xwd "$@" | /usr/local/netpbm/bin/xwdtopnm 2>/dev/null | \
	/usr/local/netpbm/bin/pnmdepth 255 2>/dev/null | \
	pnmtopng -gamma 0.45 2>/dev/null >$file
.