scale(x, y) {
		this.getContext().scale(x, y);
	}
adds a scaling transformation to the renderer units horizontally and/or vertically
@param {number} x - Scaling factor in the horizontal direction. A negative value flips pixels across the vertical axis. A value of 1 results in no horizontal scaling.
@param {number} y - Scaling factor in the vertical direction. A negative value flips pixels across the horizontal axis. A value of 1 results in no vertical scaling