/**
 * Watermark — the MS Word "Design → Watermark" feature.
 *
 * In OOXML a watermark is legacy VML stored inside a header part, inside a
 * paragraph run: `<w:pict><v:shape>…</v:shape></w:pict>`. It renders behind
 * the body content on every page of the section. Word supports two kinds:
 *
 * - **Text** — `<v:shape type="#_x0000_t136"><v:textpath string="DRAFT"/>`
 *   with a fill color, font, optional rotation (diagonal vs horizontal) and a
 *   reduced-opacity "semitransparent" look.
 * - **Picture** — `<v:shape><v:imagedata r:id="rIdN"/>` referencing a media
 *   file, scaled, optionally "washed out" (lightened).
 *
 * We model the watermark as a dedicated field on the owning `HeaderFooter`
 * rather than as editable run content, so it stays out of the ProseMirror text
 * flow while still round-tripping through parse → render → serialize.
 */
/**
 * Text watermark (e.g. "CONFIDENTIAL", "DRAFT").
 */
interface TextWatermark {
    kind: 'text';
    /** The watermark text. */
    text: string;
    /** Font family (e.g. 'Calibri'). */
    font: string;
    /** Fill color as a CSS hex string (e.g. '#C0C0C0'). */
    color: string;
    /** Word's "Semitransparent" checkbox — renders at reduced opacity. */
    semitransparent: boolean;
    /** Diagonal (≈ -45°) or horizontal layout. */
    layout: 'diagonal' | 'horizontal';
    /** Font size in points. When undefined the renderer auto-sizes to the page (Word's "Auto"). */
    fontSize?: number;
}
/**
 * Picture watermark — a scaled, optionally washed-out background image.
 */
interface PictureWatermark {
    kind: 'picture';
    /** Header-part relationship id of the media (set for images parsed from an existing file). */
    relId?: string;
    /** Package path of the media, e.g. 'word/media/image1.png'. */
    mediaPath?: string;
    /** Raw bytes for an image added in-editor (no rId yet). */
    data?: Uint8Array;
    /** MIME type for `data`. */
    contentType?: string;
    /** Ready-to-use data URL for rendering (resolved from media or `data`). */
    dataUrl?: string;
    /** Scale factor; 1 = 100% / Word's "Auto". */
    scale: number;
    /** Word's "Washout" checkbox — lightens the image so text stays readable. */
    washout: boolean;
    /** Natural width in EMUs (when known). */
    widthEmu?: number;
    /** Natural height in EMUs (when known). */
    heightEmu?: number;
}
/**
 * A document watermark — text or picture.
 */
type Watermark = TextWatermark | PictureWatermark;
/**
 * Default text-watermark presets shown in the watermark dialog, mirroring the
 * canned phrases MS Word offers. Adapters expose a `watermarkPresets` prop to
 * override this list; both React and Vue fall back to these when unset.
 */
declare const DEFAULT_WATERMARK_PRESETS: readonly string[];
/**
 * Compute the display dimensions (in EMUs) for a picture watermark from the
 * source image's natural pixel size. Bounds the larger side to a page-sized
 * default and derives the other from the aspect ratio, so the watermark is
 * never distorted (the serializer would otherwise force a square) and never
 * overflows the page. Returns `undefined` for an unusable size (zero/NaN),
 * letting callers fall back to defaults.
 */
declare function pictureWatermarkDisplayEmu(naturalWidthPx: number, naturalHeightPx: number): {
    widthEmu: number;
    heightEmu: number;
} | undefined;

export { DEFAULT_WATERMARK_PRESETS as D, type PictureWatermark as P, type TextWatermark as T, type Watermark as W, pictureWatermarkDisplayEmu as p };