#!/bin/sh

# Brute force, over-kill wrapper to png-reducing utilities that attempts to
# get the smallest .png file possible.
#
# Only lossless transformations are considered.
# Reducing the size/complexity of the image might also be a good idea.

# Iain Murray, 2010

for f in "$@" ; do
    optipng "$f"
    for a in 0 128 192 256 512 1024 ; do
        pngout "$f" -b$a
    done
    advdef -z -4 "$f"
    advpng -z -4 "$f"
done