import { CanvasColor } from "../common-types";
export declare class CanvasUtils {
    static manipulatePixels(canvas: HTMLCanvasElement, ctx: CanvasRenderingContext2D, colorTransformer: (color: CanvasColor, greyscale?: number) => CanvasColor): void;
    static thresholding(canvas: HTMLCanvasElement, ctx: CanvasRenderingContext2D, threshold: number, colorTransformer: (color: CanvasColor, limit: boolean, greyscale?: number) => CanvasColor): void;
    static stackBlur(canvas: HTMLCanvasElement, ctx: CanvasRenderingContext2D, radius?: number): void;
    static measureTextFontSize(maxWidth: number, maxHeight: number, lines: string[], font: string, lineHeightPercent?: number, canvas?: HTMLCanvasElement): number;
    static drawLines(context: CanvasRenderingContext2D, lines: string[], font: string, size: number, lineHeightPercent?: number, align?: string, baseLine?: string, x?: number, y?: number): number;
    static wrapText(context: CanvasRenderingContext2D, text: string, x: number, y: number, maxWidth: number): void;
    static setFontProps(context: CanvasRenderingContext2D, font: string, fontSize: number, align?: string, baseLine?: string): void;
    private static getTextWidth;
    private static getTextBitmapHeight;
    private static halveValidateFontSize;
}
export declare function getOffScreenCanvas(): HTMLCanvasElement;
export declare function createStripePattern(size: number, color1: string, color2: string): CanvasPattern;