import type { ImageTransform } from '../types.js';
/**
 * Converts a file path and transformation properties into a formatted filename.
 *
 * `<prefixDirname>/<baseFilename>_<hash><outputExtension>`
 */
export declare function propsToFilename(filePath: string, transform: ImageTransform, hash: string): string;
/** Hashes the subset of transform properties that affect the output image. */
export declare function hashTransform(transform: ImageTransform, imageService: string, propertiesToHash: string[]): string;
