# File lib/rqrcode/qrcode/qr_util.rb, line 200
    def QRUtil.demerit_points_2_full_blocks(modules)
      demerit_points = 0
      module_count = modules.size

      # level 2
      (0...(module_count - 1)).each do |row|
        (0...(module_count - 1)).each do |col|
          count = 0
          count += 1 if modules[row][col]
          count += 1 if modules[row + 1][col]
          count += 1 if modules[row][col + 1]
          count += 1 if modules[row + 1][col + 1]
          if (count == 0 || count == 4)
            demerit_points += DEMERIT_POINTS_2
          end
        end
      end

      return demerit_points
    end