developmentseed/node-blend — pull request #18 by springmeyer (2012-10-31 22:29:22+00:00)
Title: Hextree, miniz, fixed palettes support

This branch makes any image output that needs alpha now use the hextree encoding algorithms from mapnik for better quality. It also includes disabled support for using miniz for faster png encoding, and the ability to used fixed palettes.

@kkaefer implemented all these features. I tested and fixed a few things like #12.

After this is merged other nice things to work on would be making `hextree` optional (#17) and trying to increase performance (#16).