Make use of pngcrush to strip PNG files (via new script)

optimize_images

@@ -1,6 +1,6 @@
 #!/bin/sh
 
-# TODO: pngcrush -q -rem gAMA -rem alla -rem text {}.png {}.crushed.png
+find . -iname '*.png' -exec pngstripper {} \;
 find . -iname '*.png' -exec optipng -o9 -q {} \;
 find . -iname '*.png' -exec advpng -z -4 -q {} \;
 find . -iname '*.gif' -exec gifsicle -O2 -b {} \;

pngstripper

@@ -0,0 +1,13 @@
+#!/bin/bash
+#
+# Strips non-essential parts of PNG images using pngcrush
+#
+
+if [ "z$1" = "z" ] ; then
+    echo "Usage: `basename $0` file1.png [ file2.png [ file3.png ... ] ]"
+    exit 1
+fi
+
+for f in $* ; do
+    pngcrush -q -rem gAMA -rem alla -rem text $f $f.crushed && mv $f.crushed $f
+done