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31 lines
824 B
Bash
Executable File
31 lines
824 B
Bash
Executable File
#!/bin/sh
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# pngzop_brute.sh
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# For use in the pngzop project
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# Copyright 2013 by Glenn Randers-Pehrson
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# Released under the pngcrush license (equivalent to the libpng license)
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# Extracts the concatenated data from the IDAT chunks in a set of PNG files,
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# recompresses them with zopfli, and embeds them in a new set of PNG files
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# with suffix ".png" replaced with "_pngzop_brute.png"
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# Usage:
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# pngzop_brute *.png
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# Standard Input: *.png
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# Output: *_pngzop_brute.png
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# To do: Adjust zlib CMF to reflect actual windowBits required.
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for x in $*
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do
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root=`echo $1 | sed -e s/.png$//`
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pngzop_get_ihdr.exe < $1 > ${root}_pngzop_brute.png
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pngzop_brute_zopfli.sh $1
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pngzop_zlib_to_idat.exe < ${root}.zlib >> ${root}_pngzop_brute.png
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rm ${root}.zlib
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pngzop_get_iend.exe < $1 >> ${root}_pngzop_brute.png
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shift
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done
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