list_braille.rb

class BinaryDotToBraille
  LEFT_SHIFT_TABLE = {
    0b00000001 => 7,
    0b00000010 => 4,
    0b00000100 => 1,
    0b00001000 => 3,
    0b00010000 => 0,
    0b00100000 => -3,
    0b01000000 => -5,
    0b10000000 => -7
  }
  num = 0
  @@num_to_braille = {}
  (0..0xF).each do |upper|
    (0..0xF).each do |downer|
      code = (0..7).inject(0) { |code, bit_digit|
        mask = 1 << bit_digit
        code |= (num & mask) << LEFT_SHIFT_TABLE[mask]
      }
      @@num_to_braille[code] = [(0x2800 + upper * 0x10 + downer)].pack('U*')
      num += 1
    end
  end

  def self.convert(width, height, binary)
    if width % 2 != 0 || height % 4 != 0
      nil
    else
      table = []
      vertical_char_num = height / 4
      horizontal_char_num = width / 2
      (0..(vertical_char_num - 1)).each do |v_pos|
        row = []
        (0..(horizontal_char_num - 1)).each do |h_pos|
          braille_binary =
            binary.slice((v_pos * 4    ) * width + h_pos * 2, 2) +
            binary.slice((v_pos * 4 + 1) * width + h_pos * 2, 2) +
            binary.slice((v_pos * 4 + 2) * width + h_pos * 2, 2) +
            binary.slice((v_pos * 4 + 3) * width + h_pos * 2, 2)
          row << @@num_to_braille[braille_binary.to_i(2)]
        end
        table << row
      end
      table
    end
  end
end

puts BinaryDotToBraille.convert(64, 48,
  '0000000000000000000000000000000000000000000000000000000000000000'+
  '0000010010101010010000000100010000101000010000000000000000000000'+
  '0000010010101110111010001010100001000100111001000000000000000000'+
  '0000010000001010110000100100000001000100010001000000000000000010'+
  '0000010000001010011001000110000001000100101011100000111000000100'+
  '0000000000001110111010001100000001000100000001000000000000001000'+
  '0000010000001010010000101110000001000100000001000100000001000000'+
  '0000000000000000000000000000000000101000000000001000000000000000'+
  '0000000000000000000000000000000000000000000000000000000000000000'+
  '0000000000000000000000000000000000000000000000000000000000000100'+
  '0100010011001100001011100110111001000100000000000010000010001010'+
  '1010110000100010011010001000001010101010010001000100111001000010'+
  '1110010001000100101011001100010001000110000000001000000000100100'+
  '1010010010000010111000101010010010100010000000000100111001000000'+
  '0100111011101100001011000100010001001100010001000010000010000100'+
  '0000000000000000000000000000000000000000000010000000000000000000'+
  '0000000000000000000000000000000000000000000000000000000000000000'+
  '0100010011000110110011101110011010101110001010101000101011000100'+
  '1010101010101000101010001000100010100100001010101000111010101010'+
  '0010101011001000101011001100100010100100001011001000111010101010'+
  '0110111010101000101010001000101011100100001010101000101010101010'+
  '1010101010101000101010001000101010100100101010101000101010101010'+
  '0100101011000110110011101000011010101110010010101110101010100100'+
  '0000000000000000000000000000000000000000000000000000000000000000'+
  '0000000000000000000000000000000000000000000000000000000000000000'+
  '1100010011000110111010101010101010101010111001101010110001000000'+
  '1010101010101000010010101010101010101010001001000100010010100000'+
  '1010101010100100010010101010101001000100010001001110010000000000'+
  '1100101011000010010010101010111001000100010001000100010000000000'+
  '1000101010100010010010101100111010100100100001001110010000000000'+
  '1000010010101100010011101000101010100100111001000100010000000000'+
  '0000001000000000000000000000000000000000000001100000110000001110'+
  '0000000000000000000000000000000000000000000000000000000000000000'+
  '0100000010000000001000000110000010000100010010001100000000000000'+
  '0010000010000000001000000100000010000000000010000100000000000000'+
  '0000011011000110011001101110011011000100010010100100110011000100'+
  '0000101010101000101011100100101010100100010011000100111010101010'+
  '0000101010101000101010000100011010100100010010100100111010101010'+
  '0000011011000110011001100100001010100100010010100100101010100100'+
  '0000000000000000000000000000110000000000100000000000000000000000'+
  '0000000000000000000000000000000000000000000000000000000000000000'+
  '0000000000000000000000000000000000000000000000100100100011100000'+
  '0000000000000000010000000000000000000000000001000100010000000000'+
  '1100011010100110111010101010101010101010111001000100010000000000'+
  '1010101011001100010010101010101001001010001010000100001000000000'+
  '1010101010000110010010101100111001000110010001000100010000000000'+
  '1100011010001100011011101000111010100010111001000100010000000000'+
  '1000001000000000000000000000000000001100000000100100100000000000'
).map{ |row| row.join }.join("\n")
puts BinaryDotToBraille.convert(64, 32,
  '0000000000000000000000000000000000000000000000000000000000000000'+
  '0000000000000000000000000000000000000000000000000000000000000000'+
  '0000000011100000000000001110000000000000000000000000000000000000'+
  '0000000010000010000000000010000000000000000000000000000000000000'+
  '0000000010000010000000001110111000100100000000100100000011101110'+
  '0000010010000010000001000010011001001110111011101110110001101110'+
  '0000101010000010100000000100010011001010010001100110010000100010'+
  '0000010000001110010000001000100001000010111010100100111011101100'+
  '0000000000000000000000000000000000000000000000000000000000000000'+
  '0000000000000000000000000000000000000000000000000000000000000000'+
  '0000111000100100000000100100010001001000000010101100111010001010'+
  '0000001000101110111011101110111001101110111011100000001011100110'+
  '1000011001001010010000100110010010101100001010101100001010100110'+
  '0110010011000010010001100110111000100100001000100000010010100010'+
  '0000010001000010010010101010010001000100001001000010010010000100'+
  '0000100001000100111000101010010010001000111010001100101011101000'+
  '0000000000000000000000000000000000000000000000000000000000000000'+
  '0000000000000000000000000000000000000000000000000000000000000000'+
  '0100111000001110100001000000111001000010010010001110010001001110'+
  '0110010011100000100001000110001011100010001010000010010011100010'+
  '1010111011101110110011100000101000100010101011100010101001000010'+
  '0110010000100100101001000000010001000010101010000010101011101100'+
  '0100010000100100100001000000010011100100101010000100001011100100'+
  '1000100011001000100010001110101001001000101001101000000001000010'+
  '0000000000000000000000000000000000000000000000000000000000000000'+
  '0000000000000000000000000000000000000000000000000000000000000000'+
  '0000010000101110010011001110111010100100100000001110110010100100'+
  '1110010010100100111001000010000010100100100011101010000000001010'+
  '0000010001001110011001001110111010101100100010100010000000000100'+
  '0110100001000100011001000010001000101100100010100010001000000000'+
  '0000101010100100010001000010001000101100101010100100001000000000'+
  '1110111010000110010011101110110001001110110011101000110000000000'
).map{ |row| row.join }.join("\n")