import type { CanvasRenderingContext2D, TextMetrics } from "canvas";
export declare function measureText(ctx: CanvasRenderingContext2D, original: string, fontSize: number, maxWidth: number, font?: string): TextMetrics;
export declare function visibleLength(str: string): number;
export declare function capitalize(str: string): string;
export declare function findMaxFitString(ctx: CanvasRenderingContext2D, original: string, maxWidth: number, lineBreakSuffix?: string): string;