nix-packages/lib/crushpng.sh
2022-11-08 21:11:11 +01:00

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#!/bin/sh
set -ex
oxipng -o 4 --strip safe -Z $1 --out $2
[ "$(wc -c $2 | awk '{print $1}')" -le $3 ] && exit 0
for i in $(seq 100 -1 0); do
cat $1 | pngquant --quality 0-$i - | oxipng -o 4 --strip safe -Z - --out $2
[ "$(wc -c $2 | awk '{print $1}')" -le $3 ] && exit 0
done
rm $2
exit 1