export type ViewportAnchor = "top-left" | "top-center" | "top-right" | "center-left" | "center" | "center-right" | "bottom-left" | "bottom-center" | "bottom-right";
export interface SafeAreaInsets {
    left: number;
    right: number;
    top: number;
    bottom: number;
}
export interface SafeAreaOptions {
    /** Merge extra insets in game units. */
    extraInsets?: Partial<SafeAreaInsets>;
    /** Read CSS env(safe-area-inset-*) values from the browser (default: true). */
    useCssEnvInsets?: boolean;
}
export interface AnchorToViewportOptions {
    /** Scene object for scale/resize events (auto-detected from target.scene when omitted). */
    scene?: Phaser.Scene;
    /** Target object to place in viewport coordinates. */
    target: Phaser.GameObjects.GameObject;
    /** Anchor point in viewport (default: "top-left"). */
    anchor?: ViewportAnchor;
    /** Offset from anchor in game units (default: 0). */
    offsetX?: number;
    offsetY?: number;
    /** Apply safe-area insets (default: true). */
    useSafeArea?: boolean;
    /** Safe-area options (extra insets + css env toggle). */
    safeArea?: SafeAreaOptions;
    /** Update automatically on scale resize (default: true). */
    autoResize?: boolean;
}
export interface ViewportAnchorHandle {
    update(): void;
    destroy(): void;
    isDestroyed(): boolean;
    getSafeAreaInsets(): SafeAreaInsets;
}
/**
 * Anchor a game object to a viewport corner/edge/center.
 *
 * Position is computed in game coordinates and updated on resize.
 * Assumes centered origin for best results (0.5, 0.5).
 */
export declare function anchorToViewport(options: AnchorToViewportOptions): ViewportAnchorHandle;
/**
 * Resolve safe-area insets in game units.
 *
 * Uses browser CSS env(safe-area-inset-*) values when available,
 * then applies optional caller-provided extra insets.
 */
export declare function getSafeAreaInsets(scene: Phaser.Scene, options?: SafeAreaOptions): SafeAreaInsets;
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