/// <reference types="offscreencanvas" />
/**
 * used in following scenes:
 * - g `ctx.measureText`
 * - g-plugin-canvas-picker `ctx.isPointInPath`
 * - g-plugin-device-renderer `ctx.createLinearGradient` and generate texture
 */
export declare class OffscreenCanvasCreator {
    private canvas;
    private context;
    getOrCreateCanvas(offscreenCanvas: HTMLCanvasElement | OffscreenCanvas): HTMLCanvasElement | OffscreenCanvas;
    getOrCreateContext(offscreenCanvas: HTMLCanvasElement | OffscreenCanvas): CanvasRenderingContext2D | OffscreenCanvasRenderingContext2D;
}