Pebble font resource to pbm(the most close format I can think of to the pebble res) converter **Faulty**

font2pbm.rb

class Image
  attr_accessor :width, :height, :bitmap
end

img = Image.new

hexmap = nil
File.open('font1', 'rb') do |f|
  data = f.read
  img.width = data[0].ord
  img.height = data[1].ord
  img.bitmap = ""
  hexmap = data[8..-1].unpack("H*")[0]  # hex string. Caution when begin with ZERO. cannot use to_i(16).to_s(2)!!
end

hexmap.each_char do |c|
 bin =  c.to_i(16).to_s(2)
 (4 - bin.length).times { bin = "0" + bin }
 img.bitmap  = img.bitmap + bin
end

File.open('img1.pbm', 'wb') do |o|
  o.puts('P1')
  o.puts("#{img.width} #{img.height}")

  img.bitmap.each_char.with_index do |c,i|
    o.write(c)
    if((i+1) % img.width == 0)
      o.puts
    else
      o.write(' ')
    end
  end
end