/**
 * What an uploaded image becomes before it is stored: at most `width` ×
 * `height` (not enlarged, unless `enlarge` or `fit: 'cover'`), re-encoded as `format` at `quality`, rotated
 * upright and stripped of its metadata (EXIF, GPS). `fit: 'cover'` crops to
 * fill the box instead (square avatars).
 */
export type ImageOptions = {
    width?: number;
    height?: number;
    fit?: 'inside' | 'cover';
    format?: 'jpeg' | 'webp' | 'avif' | 'png';
    quality?: number;
    /** keep the metadata (off by default: a phone photo carries its GPS position) */
    keepMetadata?: boolean;
    /** enlarge a smaller image to the box; default: only with `fit: 'cover'`, whose output is always exactly the box */
    enlarge?: boolean;
};
/**
 * sharp, from the app's own dependencies — Talos does not ship an image
 * library, the app that stores images does. `useImages(sharp)` sets it
 * explicitly; otherwise it is imported by name (a literal import, so a
 * bundler's file tracing copies it into a production build — `.output` run on
 * its own had no sharp), then looked up from the working directory.
 */
export declare function useImages(sharp: unknown): void;
export declare const extOf: (o: ImageOptions) => string | undefined;
export declare function imageSize(data: Buffer): Promise<{
    width?: number;
    height?: number;
}>;
export declare function processImage(data: Buffer, o: ImageOptions): Promise<Buffer>;