image_to_js.rb

require 'RMagick'
include Magick

from_img = File.join(File.expand_path(File.dirname(__FILE__)), 'dirs_vector2.png')
to_js = File.join(File.expand_path(File.dirname(__FILE__)), '..', 'imgs', 'dirs_vector.js')

dirs = ImageList.new(from_img)

bitmap = "var colors = ["

dirs.each_pixel do |i|
  r = i[0].red 
  g = i[0].green
  b = i[0].blue
  
  bitmap << "'#{r},#{g},#{b}',"
end

bitmap << "]"

file = File.open(to_js, 'w')
file.puts(bitmap)
file.close