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libpng/pngzop_get_zdat.sh
2013-03-22 10:28:37 -05:00

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#!/bin/sh
# pngzop_get_zdat.sh
# For use in the pngzop project
# Copyright 2013 by Glenn Randers-Pehrson
# Released under the pngcrush license (equivalent to the libpng license)
# Extracts the concatenated data from the IDAT chunks in a set of PNG files,
# leaving it compressed as found.
# Usage:
# pngzop_get_zdat.sh file.png
# Output: file.zdat
for x in $*
do
root=`echo $1 | sed -e s/.png$//`
pngzop_get_idat.exe < $1 > $root.zdat
shift
done