import { PDFDocument } from 'pdf-lib';
import type { PDFFont } from 'pdf-lib';
/** Options controlling how `.txt` inputs are laid out. */
export interface TextOptions {
    /** Font size in points. Defaults to `11`. */
    fontSize?: number;
    /** Page margin in points on all four sides. Defaults to `54` (0.75in). */
    margin?: number;
    /** Line height as a multiple of the font size. Defaults to `1.35`. */
    lineHeight?: number;
    /**
     * Override the bundled DejaVu Sans font with your own TrueType/OpenType
     * font bytes — e.g. to render CJK or emoji, which the default font does not
     * cover. Pass the raw font file contents.
     */
    font?: Uint8Array | ArrayBuffer;
}
/** Maximum size of a single text input: 200 KB. */
export declare const MAX_TEXT_BYTES: number;
/**
 * Greedily wrap a single logical line to `maxWidth`, breaking on spaces and
 * hard-breaking any single word that is itself wider than the line.
 *
 * Widths are tracked incrementally from the per-character cache above, so the
 * whole pass is linear in the line's length with no repeated font layout.
 */
export declare function wrapLine(line: string, font: PDFFont, size: number, maxWidth: number): string[];
/**
 * Render UTF-8 text as a multi-page US-Letter PDF. Explicit line breaks are
 * preserved (including CR, vertical tab and the Unicode line separators), a
 * form feed starts a new page, tabs expand to spaces, and long lines wrap to
 * the page width.
 * Characters absent from the font render as its fallback glyph rather than
 * throwing (use `options.font` for scripts the default font doesn't cover).
 *
 * @throws {PdfMergeError} when the input exceeds the 200 KB limit or the font
 *   cannot be embedded.
 */
export declare function textToDocument(bytes: Uint8Array, index: number, options?: TextOptions): Promise<PDFDocument>;