transform a ArrayBuffer to an array

Hello,

i'm trying to work with arrayBuffer but i'm bad...
I'm using exemple in the graphics library at Internal Use

require("Font4x7").add(Graphics);
var g = Graphics.createArrayBuffer(5,7,1, {zigzag:true});
g.setFont4x7();
g.drawString("hello",compteur,0);

Graphics.prototype.print = function() {
  for (var y=0;y<this.getHeight();y++)
    console.log(new Uint8Array(this.buffer,this.getWidth()*y,this.getWidth()));
};

when i use the g.print()it does not produce an array of 0 and 1...
but that...

new Uint8Array([112, 240, 199, 7, 4])
new Uint8Array(5)
new Uint8Array(5)
new Uint8Array(5)
new Uint8Array(5)
new Uint8Array(5)
new Uint8Array(5)

i would like to send via Serial an array of row and colum as in the exemple of print()

thanks for you help