import React from 'react';
import { type ColorValue } from '../utils/voronoi.js';
/** Props for {@link VoronoiBackground}. */
export interface VoronoiBackgroundProps {
    /**
     * Primary color for the gradient (RGB object or hex string, e.g. `'#ff0000'`).
     * When `secondaryColor` is omitted, the hue and saturation of this color are
     * used to derive a monochromatic gradient via HSV interpolation.
     */
    primaryColor: ColorValue;
    /**
     * Secondary/end color for the gradient (RGB object or hex string).
     * When omitted, the secondary color is derived from `primaryColor` via HSV:
     * hue and saturation are preserved, value is set to 90 (bright end), while
     * `primaryColor`'s value is replaced with 10 (dark end).
     */
    secondaryColor?: ColorValue;
    /**
     * Seed for deterministic random generation.
     * If not provided, uses current timestamp.
     *
     * @remarks This value is only read on initial mount. Changes to this prop
     * after the component has mounted are ignored.
     */
    seed?: number;
    /**
     * Z-index for layering the background.
     * Default: -1 (behind everything)
     */
    zIndex?: number;
    /**
     * Opacity of the entire background.
     * Default: 1 (fully opaque)
     */
    opacity?: number;
    /**
     * Optional overlay color with opacity to darken/lighten the background.
     * Useful for improving contrast with modal content.
     * Example: 'rgba(0, 0, 0, 0.3)' for 30% black overlay
     *
     * @remarks
     * This value must not take untrusted input. Only pass values from trusted
     * sources (e.g. predefined constants, validated user selections).
     * Invalid CSS color values will be silently ignored by the browser.
     */
    overlay?: string;
    /**
     * Blur amount in pixels applied to the triangles.
     * Default: 0 (no blur beyond anti-aliasing)
     */
    blur?: number;
    /**
     * CSS class name to apply to the container div.
     */
    className?: string;
    /**
     * Additional inline styles for the container div.
     */
    style?: React.CSSProperties;
    /**
     * When true, disables pointer events on both the SVG canvas and the overlay div,
     * allowing clicks to pass through to elements beneath. Defaults to true.
     */
    pointerEventsNone?: boolean;
    /**
     * Number of internal seed points used for the Delaunay triangulation.
     * Higher values produce more polygons. Default: 98
     */
    pointCount?: number;
    /**
     * Number of points placed along each viewport edge to ensure full coverage.
     * Default: 20
     */
    edgePointCount?: number;
    /**
     * Divisor applied to the viewport area to compute the minimum triangle area threshold.
     * A higher value allows smaller triangles to survive pruning (more polygons).
     * A lower value prunes more aggressively (fewer, larger polygons). Default: 750
     */
    minAreaDivisor?: number;
    /**
     * Maximum number of small-triangle pruning iterations.
     * Default: 10
     */
    maxPruningIterations?: number;
}
/**
 * Renders a full-viewport animated Voronoi triangle mesh as a fixed-position background.
 * Uses a seeded PRNG (Mulberry32) for deterministic point generation and D3-Delaunay
 * for triangulation. Memoized to prevent unnecessary re-renders.
 *
 * @throws {ReactSharedError} If `primaryColor` or `secondaryColor` is an invalid hex color string
 *
 * @example
 * <VoronoiBackground primaryColor="#1a237e" />
 * // with secondary color and overlay:
 * <VoronoiBackground primaryColor="#1a237e" secondaryColor="#ff6b6b" overlay="rgba(0, 0, 0, 0.2)" />
 */
export declare const VoronoiBackground: React.NamedExoticComponent<VoronoiBackgroundProps & React.RefAttributes<HTMLDivElement>>;
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