import * as i0 from "@angular/core";
export declare type NcImageType = 'canvas' | 'base64' | 'blob';
export interface NcHtml2canvasOptions {
    type?: NcImageType;
    scale?: number;
    backgroundColor?: string;
}
export declare class NcHtml2canvasService {
    constructor();
    /**
     * 截图
     * @param dom 要截图的DOM元素
     * @param options 截图配置
     * @param options.type 输出图片的类型，NcImageType，可选值：'canvas' | 'base64' | 'blob'，默认值：'canvas'
     * @param options.scale 输出图片的缩放比例，值越大清晰度越高，默认值：1
     * @param options.backgroundColor 输出图片的背景颜色，默认值：'white'
     * @returns 根据type返回不同类型：
     *          - 'canvas': 返回 HTMLCanvasElement
     *          - 'base64': 返回 base64 字符串
     *          - 'blob': 返回 Blob 对象
     */
    html2canvas(dom: HTMLElement, options?: NcHtml2canvasOptions): Promise<any>;
    private getScreenScale;
    static ɵfac: i0.ɵɵFactoryDeclaration<NcHtml2canvasService, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<NcHtml2canvasService>;
}