/**
 * A Node-native image {@link @nhtio/adk/batteries/media/contracts!MediaEngine}
 * backed by sharp (libvips bindings — fast, full-format).
 *
 * @module @nhtio/adk/batteries/media/engines/sharp
 *
 * @remarks
 * The performance/fidelity engine for Node deployments: native speed plus webp/avif output
 * and the full `fit` mode set, plus a generation edge — `EMPTY_MIME` → a blank 1024×1024
 * white canvas in any supported encoding (resize in the same statement). sharp is permanently
 * Node-only (native bindings); for a cross-environment engine compose the jimp implementation
 * instead — the capability declaration is the seam, and BYO instances adapt via
 * {@link fromSharp}.
 *
 * `sharp` is an optional peer dependency, lazily imported on first actual use.
 */
import { default as SharpDefault } from 'sharp';
import type { MediaEngine } from "../contracts";
type SharpFn = typeof SharpDefault;
/** Options for {@link sharpEngine}. */
export interface SharpEngineOptions {
    /** Override the module resolution (electron/custom builds). Default: `import('sharp')`. */
    sharp?: () => SharpFn | {
        default: SharpFn;
    } | Promise<SharpFn | {
        default: SharpFn;
    }>;
}
/**
 * Construct the sharp-backed image engine.
 *
 * @param options - Optional module resolver override.
 * @returns The engine.
 */
export declare const sharpEngine: (options?: SharpEngineOptions) => MediaEngine;
/**
 * Adapt an already-configured sharp module (your import, your build flags) to the engine
 * contract — the BYO transformer.
 *
 * @param sharp - The sharp function you imported.
 * @returns The engine.
 */
export declare const fromSharp: (sharp: SharpFn) => MediaEngine;
export {};