import { type Sharp } from 'sharp';
import type { ImageFormat } from './types.js';
export interface ConvertFileParams {
    source: string;
    format: ImageFormat;
    quality: number;
    /** Optional explicit destination path; otherwise derived from source. */
    destination?: string;
    /** Optional infix (e.g. source extension) to disambiguate colliding outputs. */
    disambiguator?: string;
}
/**
 * Convert a single file into the target format. Returns the written path.
 */
export declare function convertFile({ source, format, quality, destination, disambiguator, }: ConvertFileParams): Promise<string>;
/**
 * Apply format + quality onto a preconfigured Sharp pipeline.
 * Keeps format-specific encoder options in a single place.
 */
export declare function pipeline(img: Sharp, format: ImageFormat, quality: number): Sharp;
export declare function defaultDestination(source: string, format: ImageFormat, disambiguator?: string): string;
export declare function resizedDestination(source: string, width: number, height: number, format: ImageFormat | undefined, disambiguator?: string): string;
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