/// <reference types="node" />
/// <reference types="node" />
/// <reference types="node" />
import { QPdfCompressionFlagsP } from "../../generated_proto/ironpdfengineproto/QPdfCompressionFlagsP";
import { Readable } from "stream";
import { Buffer } from "buffer";
import { AdvancedCompressionOptions } from "../../../public/compression";
export declare function compressImage(id: string, imageQuality: number, scaleToVisibleSize?: boolean): Promise<void>;
export declare function compressStructTree(id: string): Promise<void>;
export declare function compressAndSaveAs(id: string, outputPath: string, imageQuality?: number): Promise<void>;
export declare function compressInMemory(id: string, imageQuality?: number): Promise<Buffer>;
/**
 * Map a user-facing {@link AdvancedCompressionOptions} onto the wire
 * {@link QPdfCompressionFlagsP}.
 */
export declare function toFlagsProto(options: AdvancedCompressionOptions): QPdfCompressionFlagsP;
/**
 * Apply the advanced compression pipeline to an open engine document and
 * save the result to disk. Mirrors .NET
 * {@code PdfDocument.CompressAndSaveAs(string, AdvancedCompressionOptions)}.
 *
 * Step 1 (optional) — pdfium image re-encoding when {@code targetImageDpi > 0}
 * and {@code jpegQuality != null}.
 * Step 2 (optional) — struct-tree removal when {@code removeStructureTree}.
 * Step 3 — qpdf {@code QPdf_Compression_CompressAndSaveAsAdvanced}.
 */
export declare function compressAndSaveAsAdvanced(id: string, outputPath: string, options: AdvancedCompressionOptions, password?: string): Promise<void>;
/**
 * Apply the advanced compression pipeline to byte[] input and stream the
 * result back. Mirrors .NET
 * {@code PdfDocument.CompressAndSaveAs(byte[], string, AdvancedCompressionOptions, ...)}.
 *
 * Returns the compressed bytes; when {@code outputPath} is non-empty also
 * writes them to disk.
 */
export declare function compressAndSaveAsAdvancedFromBytes(pdfBytes: Buffer, outputPath: string, options: AdvancedCompressionOptions, password?: string): Promise<Buffer>;
export declare function compressInMemoryStream(id: string, imageQuality?: number): Promise<Readable>;
//# sourceMappingURL=compress.d.ts.map