/**
 * Canvas.
 */
export declare abstract class Canvas {
    private _width;
    private _height;
    /**
     * The width of the canvas.
     */
    get width(): number;
    set width(value: number);
    /**
     *The height of the canvas.
     */
    get height(): number;
    set height(value: number);
    protected abstract _onWidthChanged(value: number): void;
    protected abstract _onHeightChange(value: number): void;
}