Image bundling is a web optimization for using lot of small picture in a web page. Image bundler take a folder with a lot of images and build a big one. With CSS, you crop the part of the big picture you wont to use. PNG compression is better in a large picture than in the sum of small ones. Loading a lot of small files is inneficient : there is latency for establishing each connection, and only few downloads can be parralilized.
GWT use this trick for an efficient toolbar's pictures downloading.
A simple test with Adium's images :
60% diet for all this images.
PIL_ is the only dependency, the setup will fetch it.
::
python setup.py build sudo python setup.py install
::
bundler someFolder
Bundler will try to open every file it can handle.
You should use pngcrush or optipng for a perfect optimisation.
Bundler builds a big PNG file, a cute CSS file and an ugly HTML test file.
GPL v3.
.. PIL: http://www.pythonware.com/products/pil/
.. pngcrush: http://pmt.sourceforge.net/pngcrush/
.. _optipng: http://optipng.sourceforge.net/