ascii-based ansi-art editor

nyan.txt

..................................*.................................................................. 
...rrrrrrrrrrrrrrrrrrrrr.....................rrrrrrrrrrrrr                           .......*........ 
rrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrr  ccccccccccccccccccccccccccc  ....***....... 
rrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrr  cccccpppppppppppppppppppppccccc  ...*........ 
rrrooooooooooooooooooooorrrrrrrrrrrrrrrrrrrrrooooooooo  ccpppppppPpppppppPpppppppppppcc  ............ 
oooooooooooooooooooooooooooooooooooooooooooooooooooooo  ccppppppppppppp    pppPpPppppcc  ..    ...... 
oooooooooooooooooooooooooooooooooooooooooooooooooooooo  ccpppppPppppp  GGGG  ppppppppcc    GGGG  .... 
oooyyyyyyyyyyyyyyyyyyyyyoooooooooooooooooooooyyyyyyyyy  ccppppppppppp  GGGGGG  ppPpppcc  GGGGGG  .... 
yyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyy    yyyyyy  ccppppppppppp  GGGGGGGG        GGGGGGGG  .... 
yyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyy  GGGG  yyyy  ccpPpppppppPp  GGGGGGGGGGGGGGGGGGGGGGGG  .... 
yyygggggggggggggggggggggyyyyyyyyyyyyyyyyyy  GGGG        ccppppppppp  GGGGGGGGGGGG(qa)GGGGGGGGGGGG  .. 
gggggggggggggggggggggggggggggggggggggggggggg  GGGGGGGG  ccppppPpppp  GGGG**  GGGGGGGGGGGG**  GGGG  .. 
gggggggggggggggggggggggggggggggggggggggggggggg    GGGG  ccppppppppp  GGGG    GGGGGGG  GGG    GGGG  .. 
gggbbbbbbbbbbbbbbbbbbbbbgggggggggggggggggggggbbbbb      ccppppppPpp  GGkkGGGGGGGGGGGGGGGGGGGGkkGG  .. 
bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb  ccpPppppppp  GGkkGG  GGGGG  GGGGG  GGkkGG  .. 
bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb  ccppppPpppppp  GGGG                GGGG  .... 
bbbvvvvvvvvvvvvvvvvvvvvvbbbbbbbbbbbbbbbbbbbbbvvvvvvvvv  ccpppppppppPppp  GGGGGGGGGGGGGGGGGGGG  ...... 
vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv    cccccpppppppppppp                    ........ 
vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv  GG  cccccccccccccccccccccccccc  GG  ........... 
vvv.....................vvvvvvvvvvvvvvvvvvvvv.....  GGGGGG                          GGGG  ........... 
.............*....................................  GGGG  ..  GGGG  ...  GGGG  .....      ........... 

nyansi.js

var fs = require('fs');

var rawNyan = fs.readFileSync(__dirname+'/nyan.txt','utf8');

var pallete = {
  r: 196,
  o: 214,
  y: 226,
  g: 82,
  b: 39,
  v: 99, // 98?
  c: 223, // cookie: yellower: 229
  p: 219, P: 201, // 201?
  k: 225, // cheeK
  '.': 24, // 32?
  ' ': 0,
  '*': 15,
  G: 248
};

var out = '';
var curColor = 0;

for (var i=0, len=rawNyan.length; i<len; i++) {
  var c = rawNyan.substr(i,1);
  var color = pallete[c];

  if (color === undefined) {
    out += c;
    continue;
  }

  if (color !== curColor)
    out += "\x1b[48;5;"+color+"m";

  out += ' ';
  curColor = color;
}
out += "\x1b[0m\n";
process.stdout.write(out);