// Type definitions for gulp-image 4.3
// Project: https://github.com/1000ch/gulp-image#readme
// Definitions by: Aankhen <https://github.com/Aankhen>
// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
// TypeScript Version: 2.4

/// <reference types="node" />

import stream = require("stream");

export = GulpImage;

declare function GulpImage(options?: GulpImage.Options): stream.Transform;

declare namespace GulpImage {
    type OptimizerSetting = boolean
        | any[];

    interface Options {
        pngquant?: OptimizerSetting;
        optipng?: OptimizerSetting;
        zopflipng?: OptimizerSetting;
        jpegRecompress?: OptimizerSetting;
        mozjpeg?: OptimizerSetting;
        guetzli?: OptimizerSetting;
        gifsicle?: OptimizerSetting;
        svgo?: OptimizerSetting;
        concurrent?: number;
        quiet?: boolean;
    }
}