export type EdgeMapOptions = {
    /** Inset of the neutral (undistorted) zone from the edges, in % of element size */
    inset: number;
    /** Corner radius of the neutral zone, in map units (viewBox 0-100) */
    cornerRadius: number;
    /** Blur of the neutral zone edge — controls how soft the refraction band is */
    innerBlur: number;
    /** Blur wrapping the whole map — smooths the displacement gradients */
    outerBlur: number;
    /** Shape of the neutral zone */
    shape: "rect" | "circle";
};
/**
 * Builds a scale-independent displacement map (viewBox 0-100, stretched to the
 * element via preserveAspectRatio="none"). The center is neutral gray (#808080),
 * so only the edge band refracts — the content behind the center stays intact.
 *
 * Based on tw-glass by assistant-ui (MIT):
 * https://github.com/assistant-ui/assistant-ui/tree/main/packages/tw-glass
 */
export declare const getEdgeDisplacementMap: ({ inset, cornerRadius, innerBlur, outerBlur, shape, }: EdgeMapOptions) => string;