/**
 * Shared image utilities for PDF generation.
 *
 * Centralises JPEG/PNG dimension parsing and PDF XObject writing so that
 * both the builder (`document-builder.ts`) and the exporter (`pdf-exporter.ts`)
 * share a single implementation.
 */
import type { PdfWriter } from "../core/pdf-writer.js";
/**
 * Parse image dimensions from raw bytes.
 */
export declare function parseImageDimensions(data: Uint8Array, format: "jpeg" | "png"): {
    width: number;
    height: number;
};
/**
 * Read width/height from a PNG IHDR chunk (bytes 16-23).
 */
export declare function parsePngDimensions(data: Uint8Array): {
    width: number;
    height: number;
};
/**
 * Read width/height from JPEG SOF marker.
 *
 * Correctly excludes non-SOF markers in the 0xC0-0xCF range:
 * - 0xC4 = DHT (Define Huffman Table)
 * - 0xC8 = JPG (reserved)
 * - 0xCC = DAC (Define Arithmetic Coding)
 */
export declare function parseJpegDimensions(data: Uint8Array): {
    width: number;
    height: number;
};
/**
 * Write an image XObject (JPEG or PNG) to the writer.
 * Returns the allocated object number.
 */
export declare function writeImageXObject(writer: PdfWriter, data: Uint8Array, format: "jpeg" | "png"): number;