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scripts/optimize-png.sh

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+#!/bin/sh
+# Script to optimize and compress png impage files to reduce size.
+# All operations are lossless
+# Requires optipng and advpng
+# In Ubuntu: "sudo apt-get install advancecomp optipng"
+
+files=`find icons/ -name '*.PNG' -o -name '*.png'`
+
+optipng -o 7 $files
+advpng -z -4 -i 25 $files
+# Sometimes 7z is actually smaller than zopfli
+advpng -z -3 -i 25 $files
+