render(canvas) {
        if (this._enabled) {
            this._filters.forEach(f => f.render(canvas));
        }
    }
/**
     * run render method for all filters
     * updates the specified canvas
     * @param canvas {HTMLCanvasElement}
     */
run render method for all filters
updates the specified canvas
@param canvas {HTMLCanvasElement}
run render method for all filters updates the specified canvas @param canvas { HTMLCanvasElement }
render(canvas) {
        if (this._enabled) {
            this._filters.forEach(f => f.render(canvas));
        }
    }
render ( canvas ) { if ( this . _enabled ) { this . _filters . forEach ( f => f . render ( canvas ) ) ; } }
run render method for all filters
 updates the specified canvas
 @param canvas {HTMLCanvasElement}
run render method for all filters updates the specified canvas @param canvas { HTMLCanvasElement }