import type { ICanvasContext } from './Common/ICanvasContext';
export interface IPlatform {
    getPixelRatio: (context: ICanvasContext) => number;
    convertPt2Px: number[];
    createTextFontString: (attrs: {
        italic?: boolean;
        bold?: boolean;
        size: number;
        font: string;
    }) => string;
    measureTextWidth: (text: string, attrs: {
        italic: boolean;
        bold: boolean;
        size: number;
        font: string;
    }) => number;
    measureTextMetrics: (attrs: {
        bold: boolean;
        size: number;
        font: string;
    }) => {
        baseline: number;
        bottom: number;
        xTop: number;
    };
    requestIdleCallback: (cb: (param: {
        didTimeout: boolean;
        timeRemaining: () => number;
    }) => void) => number;
    cancelIdleCallback: (id: number) => void;
}
export declare const initPlatform: (platform: IPlatform) => void;
export declare const getPlatform: () => IPlatform;