import { Canvas, Image } from '../canvas';
import { Size } from '../math';
import { Surface } from './surface';
import { SurfaceFrame } from './surface-frame';
export declare class OffscreenCanvasSurface implements Surface {
    private _canvas?;
    private _context?;
    private el?;
    private prevFrame?;
    acquireFrame(size: Size): SurfaceFrame;
    private present;
    private createOrUpdateEl;
    get context(): CanvasRenderingContext2D | OffscreenCanvasRenderingContext2D;
    get canvas(): Canvas;
    toImage(sx?: number, sy?: number, sw?: number, sh?: number): Image;
}