import type { CanvasGradient, CanvasPattern, CanvasRenderingContext2D } from "canvas";
export declare function drawVerticalText(ctx: CanvasRenderingContext2D, str: string, x: number, y: number, fontSize: number, 
/**
 * Line width of the text stroke.
 */
linewidth: number, mainColor?: string | CanvasGradient | CanvasPattern, borderColor?: string | CanvasGradient | CanvasPattern, font?: string): void;