import { Renderer } from './renderer';
/**
 * 职责：
 * 1. 封装动画相关，帧回调
 * 2. 可能的渐进式渲染支持
 */
export declare abstract class AnimationRenderer extends Renderer {
    private FRAME_RATE;
    private FRAME_TIME;
    private initialized;
    private requestAnimationFrameId;
    private lastAnimationFrameTime;
    startCallback: any;
    stopCallback: any;
    startAnimation(): void;
    stopAnimation(): void;
    animationFrameCallback(): void;
    private windowAnimationFrameCallback;
    private windowCancelAnimationFrame;
    private wxAnimationFrameCallback;
    private wxCancelAnimationFrame;
    private drawFrame;
}