47 lines
1.1 KiB
Bash
Executable File
47 lines
1.1 KiB
Bash
Executable File
#!/bin/bash
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#
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# compress-pngs.sh
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# Run various compression and optimization utilities on one or more PNGs
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#
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# Wireshark - Network traffic analyzer
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# By Gerald Combs <gerald@wireshark.org>
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# Copyright 2013 Gerald Combs
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#
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# SPDX-License-Identifier: GPL-2.0-or-later
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#
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while getopts h OPTCHAR
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do
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case $OPTCHAR in
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h|?)
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echo "Usage: compress-pngs.sh file1.png [file2.png] ..." 1>&1
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exit 0
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;;
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esac
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done
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# Other utilities:
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# PNGOUT (http://advsys.net/ken/utils.htm). Closed source.
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# pngquant (https://pngquant.org/). Lossy.
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JOBS=8
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PNG_FILES=$(printf "%q " "$@")
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export PNG_FILES
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(
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cat <<"FIN"
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all: $(PNG_FILES)
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$(PNG_FILES): FORCE
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@echo Compressing $@
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@hash oxipng 2>/dev/null && oxipng --opt 4 --strip safe "$@"
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@hash optipng 2>/dev/null && optipng -o3 -quiet "$@"
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@hash advpng 2>/dev/null && advpng --recompress --shrink-insane "$@"
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@hash advdef 2>/dev/null && advdef --recompress --shrink-insane "$@"
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@hash pngcrush 2>/dev/null && pngcrush -q -ow -brute -reduce -noforce "$@" pngout.$$$$.png
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FORCE:
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FIN
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) | make -j $JOBS -f -
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