function CanvasRenderTarget(width, height, resolution) {
        this.canvas = settings.ADAPTER.createCanvas();
        this.context = this.canvas.getContext('2d');
        this.resolution = resolution || settings.RESOLUTION;
        this.resize(width, height);
    }
@param width - the width for the newly created canvas
@param height - the height for the newly created canvas
@param {number} [resolution=PIXI.settings.RESOLUTION] - The resolution / device pixel ratio of the canvas