/**
 * Host-mandated watermark for PPTX exports.
 *
 * The resolver runs at the start of every PPTX export, so entitlement changes
 * on the host side (a user upgrading mid-session) take effect on the next
 * download without remounting. Returning null/undefined exports a clean deck.
 * A resolver that throws, or an image that cannot be loaded, fails the export
 * — the engine never silently drops a mark the host asked for.
 */
export type FikaExportWatermarkPosition = 'bottom-right' | 'bottom-left' | 'top-right' | 'top-left';
export type FikaWatermarkSurface = 'light' | 'dark';
export interface FikaExportWatermark {
    /**
     * Mark for light slide fills (dark artwork). PNG or JPEG as a `data:` URL
     * or a URL the browser can fetch.
     */
    image: string;
    /**
     * Mark for dark / photo slides (light artwork). When omitted every slide
     * uses `image`. Polarities come from the same `preferredInk` query as editor
     * chrome and text contrast.
     */
    imageOnDark?: string;
    /** Corner of the slide. @default 'bottom-right' */
    position?: FikaExportWatermarkPosition;
    /** Mark width as a fraction of the slide width (0–1]. @default 0.12 */
    widthRatio?: number;
    /** Gap to the slide edges as a fraction of the slide width (0–1]. @default 0.02 */
    marginRatio?: number;
    /** Extra opacity applied on top of the image's own alpha (0–1]. @default 1 */
    opacity?: number;
    /** Shape name shown by presentation apps. @default 'Watermark' */
    name?: string;
}
export type FikaExportWatermarkResolver = () => FikaExportWatermark | null | undefined | Promise<FikaExportWatermark | null | undefined>;
export declare function setFikaExportWatermark(resolver?: FikaExportWatermarkResolver | null): void;
export declare function getFikaExportWatermark(): FikaExportWatermarkResolver | null;