import type { OutputFormat } from './types.js';
/**
 * Emits the URL of the image, or an array of URLs when multiple configs are resolved.
 */
export declare const urlFormat: OutputFormat;
/**
 * Emits a `srcset` string built from each image's URL and width descriptor
 * (or pixel density descriptor when `basePixels` is set).
 */
export declare const srcsetFormat: OutputFormat;
/**
 * Emits the flat metadata of the image, or only the `whitelist` keys of it.
 */
export declare const metadataFormat: OutputFormat;
/**
 * Emits the `src`, `w` and `h` of the largest image, plus a `srcset` when
 * multiple images are produced.
 */
export declare const imgFormat: OutputFormat;
/**
 * Emits the `<picture>` sources per format plus the `img` fallback, which should
 * be specified last.
 */
export declare const pictureFormat: OutputFormat;
export declare const builtinOutputFormats: {
    url: OutputFormat;
    srcset: OutputFormat;
    img: OutputFormat;
    picture: OutputFormat;
    metadata: OutputFormat;
    meta: OutputFormat;
};