/**
 * @squoosh-kit/oxipng public API
 */
import type { BridgeMode, ImageInput } from '@squoosh-kit/runtime';
import { type BridgeOptions } from './bridge';
import type { OxipngOptions } from './types';
export type { ImageInput, OxipngOptions };
/**
 * A reusable OxiPNG optimizer function that can be terminated to clean up resources.
 */
export type OxipngOptimizerFactory = ((imageData: ImageInput, options?: OxipngOptions, signal?: AbortSignal) => Promise<Uint8Array>) & {
    /**
     * Terminates the optimizer and cleans up resources.
     * Important for worker mode to prevent memory leaks.
     *
     * @example
     * const optimizer = createOxipngOptimizer('worker');
     * try {
     *   const result = await optimizer(imageData, { level: 3 });
     * } finally {
     *   await optimizer.terminate();
     * }
     */
    terminate(): Promise<void>;
};
/**
 * Optimizes a PNG image using OxiPNG. Uses worker mode for UI responsiveness.
 *
 * @param imageData - The raw RGBA image data to optimize.
 * @param options - OxiPNG optimization options.
 * @param signal - Optional AbortSignal to cancel the operation.
 * @returns A Promise resolving to the optimized PNG data as a Uint8Array.
 *
 * @example
 * const result = await optimize(imageData, { level: 3 });
 */
export declare function optimize(imageData: ImageInput, options?: OxipngOptions, signal?: AbortSignal): Promise<Uint8Array>;
/**
 * Creates a reusable OxiPNG optimizer for a specific execution mode.
 * Useful for processing multiple images without creating new workers each time.
 *
 * @param mode - The execution mode, either 'worker' or 'client'.
 * @param options - Optional bridge configuration options.
 * @returns A function that optimizes a PNG image with optional AbortSignal.
 */
export declare function createOxipngOptimizer(mode?: BridgeMode, options?: BridgeOptions): OxipngOptimizerFactory;