code: function SimplePacker(max, first, buffer) {
          _classCallCheck(this, SimplePacker);
  
          this.max = max;
          this.buffer = buffer;
          this.list = [];
          this.x = 0;
          this.y = 0;
          this.largest = 0;
      }
docs: ridiculously simple packer, optimized (if you can call it that) only for speed
  @param {number} max size
  @param {boolean} first block
  @param {number} buffer between each block