getPointer(touch) {
    return {
      x: touch.x - getAbsoluteLeft(this.canvas.frame.canvas),
      y: touch.y - getAbsoluteTop(this.canvas.frame.canvas),
    };
  }
Get the pointer location from a touch location
@param {{x: number, y: number}} touch
@returns {{x: number, y: number}} pointer
@private