Extract Emoji from G+ Hangouts Sprite Sheet

extract.rb

#!/usr/bin/env ruby
require 'free-image'
require 'ruby-progressbar'
image = FreeImage::Bitmap.open(ARGV[0])
count = (image.height + 1) / 29

pb = ProgressBar.create(:title => "Scaling", :total => count)

count.times do |i|
	#puts i
	top = i * 29
	bottom = top + 28

	image.copy(0,top,28,bottom) do |face|
		# :box is for shitty scaling
		face.rescale(500,500,:bicubic).save("bicubic/#{i}.png", :png)
		pb.increment
	end
end