lib/utils/draw2D.js
function Barcode2D() {
  this.width = 0;
  this.height = 0;
  this.background = '#FFF';
  this.modulecolor = '#000';
  this.type = 'PNG';
  this.leftoffset = 0;
  this.topoffset = 0;
  this.unitwidth = 0;
  this.unitheight = 0;
}
function Barcode2D() {
  this.width = 0;
  this.height = 0;
  this.background = '#FFF';
  this.modulecolor = '#000';
  this.type = 'PNG';
  this.leftoffset = 0;
  this.topoffset = 0;
  this.unitwidth = 0;
  this.unitheight = 0;
}
/*
Basic constructor