New Formula: pngrewrite

Pngrewrite is command-line utility that reduces the unnecessarily large palettes that too many programs write into PNG files. It also optimizes transparency settings, and reduces the bits-per-pixel if possible. Handy for post-processing images before putting them on a web site.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>

Formula/pngrewrite.rb

@@ -0,0 +1,16 @@
+require 'formula'
+
+class Pngrewrite <Formula
+  url 'http://entropymine.com/jason/pngrewrite/pngrewrite-1.3.0.zip'
+  homepage 'http://entropymine.com/jason/pngrewrite/'
+  md5 '37216932d12bf9b47dca1f45724080d6'
+
+  def install
+    ENV.libpng
+    
+    system "#{ENV.cc} #{ENV['CFLAGS']} #{ENV['CPPFLAGS']} " +
+           "-o pngrewrite pngrewrite.c " +
+           "#{ENV['LDFLAGS']} -lpng"
+    bin.install 'pngrewrite'
+  end
+end