/**
 * WebP Encoder - Instance-based encoder for efficient batch processing
 */
import { WebPEncodeOptions } from './types';
/**
 * WebP Encoder class
 *
 * Creates an encoder instance that can be reused for multiple images,
 * reducing initialization overhead.
 *
 * @example
 * ```typescript
 * const encoder = new WebPEncoder({ quality: 80, lossless: false });
 * const webp1 = encoder.encode(jpegData1);
 * const webp2 = encoder.encode(pngData);
 * encoder.close();
 * ```
 */
export declare class WebPEncoder {
    private encoderPtr;
    private closed;
    /**
     * Create a new WebP encoder with the given options
     * @param options Partial WebP encoding options (merged with defaults)
     */
    constructor(options?: Partial<WebPEncodeOptions>);
    /**
     * Encode image file data (JPEG, PNG, etc.) to WebP format
     * @param imageFileData Buffer containing image file data
     * @returns WebP encoded data as Buffer
     */
    encode(imageFileData: Buffer): Buffer;
    /**
     * Close the encoder and free resources
     * Must be called when done using the encoder
     */
    close(): void;
    /**
     * Get default WebP encoding options
     */
    static getDefaultOptions(): WebPEncodeOptions;
    /**
     * Convert TypeScript options to C struct
     */
    private convertOptions;
}
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