#!/usr/bin/env node
/**
 * Help text shown for `--help` and on invalid usage.
 * Exported so it can be asserted in tests without running the full CLI pipeline.
 */
export declare const HELP_TEXT = "Usage: pdf-to-png-converter <pdf-file-path> [options]\n\nOptions:\n  --output-folder <dir>             Folder path where PNG files will be written\n  --viewport-scale <number>         Scale factor applied to each page viewport\n  --use-system-fonts                Attempt to use fonts installed on the host system\n  --disable-font-face <true|false>  Do not load embedded fonts (true/false)\n  --enable-xfa <true|false>         Process XFA form data (true/false)\n  --pdf-file-password <pwd>         Password for encrypted PDFs\n  --pages-to-process <n,m,...>      Comma-separated list of 1-based page numbers\n  --verbosity-level <number>        pdfjs verbosity level (0=errors, 1=warnings, 5=infos)\n  --return-metadata-only            Return page metadata without rendering images\n  --return-page-content             Retain rendered PNG buffers in results (default: false)\n  --process-pages-in-parallel       Process pages concurrently\n  --concurrency-limit <number>      Maximum number of pages rendered simultaneously\n  --silent                          Suppress output unless there is an error\n  --version                         Show version\n  --help                            Show this help message";
/**
 * Parses a CLI string value as a boolean.
 *
 * - `'true'` / `'1'` → `true`
 * - `'false'` / `'0'` → `false`
 * - `undefined` → `undefined` (flag not provided)
 *
 * @throws {Error} When the value is not a recognised boolean string.
 */
export declare function parseBoolean(val: string | undefined): boolean | undefined;
/**
 * Parses a comma-separated string of integers into a `number[]`.
 *
 * Returns `undefined` when `val` is `undefined` (flag not provided).
 *
 * @throws {Error} When any token in the list is not a valid integer.
 */
export declare function parseNumberList(val: string | undefined): number[] | undefined;
/**
 * Reads the package version from the adjacent `package.json`.
 * Falls back to `'Unknown'` on any I/O or parse error so that `--version`
 * always returns a printable string.
 */
export declare function getVersion(): string;
/**
 * Main CLI entry point.
 *
 * Parses `process.argv`, validates all options up-front with actionable error messages,
 * and delegates to {@link pdfToPng}. Exported so it can be unit-tested without
 * spawning a child process.
 */
export declare function run(): Promise<void>;