import type { CrossPlatformCanvasOrOffscreenCanvas, CrossPlatformCanvasElement, CrossPlatformOffscreenCanvas, FrameCallback, IPlatformAdapter } from './types';
export declare class WebPlatformAdapter implements IPlatformAdapter {
    private static _instance?;
    static get instance(): IPlatformAdapter;
    private rafId;
    scheduleFrame(): void;
    private frameRequestCallback;
    private onFrameCallbacks;
    onFrame(callback: FrameCallback): () => void;
    createCanvas(width: number, height: number): CrossPlatformCanvasElement;
    createOffscreenCanvas(width: number, height: number): CrossPlatformOffscreenCanvas;
    createRenderingContext(width: number, height: number): CanvasRenderingContext2D | OffscreenCanvasRenderingContext2D | null;
    resizeCanvas(el: CrossPlatformCanvasOrOffscreenCanvas, width: number, height: number): void;
    readonly supportOffscreenCanvas: boolean;
}