/// <reference types="node" />
import { CanvasRenderingContext2D } from "canvas";
import sharp, { Sharp } from "sharp";
import { ImageAnalyzer } from "./analyzer";
import { Rect, Sizeable } from "./utils";
export interface ImgTransformOptions {
    border?: number;
    beforeDrawBorder?: (c: CanvasRenderingContext2D) => void;
    maxSize: Sizeable;
    heroSize: Sizeable;
}
export declare class ImageWorkbench {
    buffer: Buffer;
    origin: Sharp;
    private _imageAnalyzer?;
    constructor(buffer: Buffer);
    get imageAnalyzer(): Promise<ImageAnalyzer>;
    makeBorder(border: {
        size: number;
        color?: string;
        blurSize?: number;
    }): Promise<{
        canvas: import("canvas").Canvas;
        originImageArea: Rect;
        heroArea: Rect;
    }>;
    transform(config: ImgTransformOptions): Promise<sharp.Sharp>;
    containTransform(opts: {
        size: Sizeable;
        padding?: number;
    }): Promise<sharp.Sharp>;
}