import type { CSSProperties } from 'react';
import type { WatermarkContent, WatermarkFont } from './watermark.type';
export interface WatermarkContentLine {
    text: string;
    font: Required<WatermarkFont>;
}
interface WatermarkTile {
    dataURL: string;
    width: number;
    height: number;
}
export declare const FontGap = 3;
export declare function getCanvasFont(font: Required<WatermarkFont>, ratio?: number): string;
export declare function mergeFont(font: Required<WatermarkFont>, customFont?: WatermarkFont): Required<WatermarkFont>;
export declare function getContentLines(content: WatermarkContent | WatermarkContent[] | undefined, font: Required<WatermarkFont>): WatermarkContentLine[];
export declare function getMarkSize(context: CanvasRenderingContext2D, content: WatermarkContentLine[], image: string | undefined, width?: number, height?: number): [number, number];
export declare function drawWatermark(content: WatermarkContentLine[] | HTMLImageElement, rotate: number, ratio: number, width: number, height: number, gapX: number, gapY: number): WatermarkTile | null;
export declare function getStyleString(style: CSSProperties): string;
export {};
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