LICENCE

            DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
                    Version 2, December 2004

 Copyright (C) 2014 Hayaki Saito <user@zuse.jp>

 Everyone is permitted to copy and distribute verbatim or modified
 copies of this license document, and changing it is allowed as long
 as the name is changed.

            DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION

  0. You just DO WHAT THE FUCK YOU WANT TO.

qrcode-sixel

#!/usr/bin/env ruby

require "rqrcode"

@qr = RQRCode::QRCode.new(ARGV.size == 0 ? $stdin.readline.chomp : ARGV[0])
puts "\033c\033Pq"
puts "#1;2;100;100;100"  # white
puts "#2;2;0;0;0"  # black
puts "---"

printf "$!18?#1!%d~", (@qr.modules.length + 2) * 6
puts "-"
for x in @qr.modules.each_index
    print "$!18?#1"
    color = 1
    run = 6
    for y in @qr.modules.each_index
        current = @qr.dark?(x, y) ? 2: 1
        if current != color then
            printf "#%d!%d~", color, run
            color = current
            run = 0
        end
        run += 6
    end
    if color == 1 then
        printf "#1!%d~", run + 6
    else
        printf "#%d!%d~#1!6~", color, run
    end
    puts "-"
end
printf "$!18?#1!%d~", (@qr.modules.length + 2) * 6
puts "\033\\\033[20H"