Add the script to losslessly optimize data

This should be run before making a release, and after adding new data.


git-svn-id: svn+ssh://svn.code.sf.net/p/supertuxkart/code/main/trunk@12804 178a84e3-b1eb-0310-8ba1-8eac791a3b58

data/optimize_data.sh

@@ -0,0 +1,49 @@
+#!/bin/sh
+#
+# (C) 2013 Lauri Kasanen, under the GPLv3
+#
+# Script to optimize the data, currently PNG, JPEG, B3DZ.
+# Run it before making a release, and after adding new data.
+# Takes 5-10min depending on your cpu.
+
+# Spaces in filenames are supported.
+
+# Start checks
+
+fail=0
+which awk >/dev/null && which jpegtran >/dev/null && which advdef >/dev/null && \
+which advzip >/dev/null || fail=1
+
+[ "$fail" -eq 1 ] && echo "Please install awk, advdef and jpegtran" && exit 1
+
+# Defines
+
+IFS="
+"
+
+export LANG=C
+
+# Go
+
+BEFORE=`du -sk | awk '{print $1}'`
+
+for png in `find -name "*.png"`; do
+	advdef -z4 "$png"
+done
+
+for jpeg in `find -name "*.jpg"`; do
+	jpegtran -optimize -copy none -outfile "$jpeg".$$ "$jpeg"
+	mv "$jpeg".$$ "$jpeg"
+done
+
+for b3dz in `find -name "*.b3dz"`; do
+	advzip -z4 "$b3dz"
+done
+
+# Add optimizations for other types if necessary
+
+AFTER=`du -sk | awk '{print $1}'`
+
+# Print stats out
+echo $BEFORE $AFTER | awk '{print "Before: " $1/1024 "mb, after: " $2/1024 "mb" }'
+echo $BEFORE $AFTER | awk '{print "Saved " (1-($2/$1)) * 100 "%" }'