export type ManagedIconSource = HTMLImageElement | ImageBitmap | HTMLCanvasElement | OffscreenCanvas;
export interface ManagedIconOptions {
    pixelRatio?: number;
    /** Anchor in 0..1 relative to sprite size. Default [0.5, 0.5]. */
    anchor?: readonly [number, number];
}
export interface PackedIcon {
    name: string;
    u0: number;
    v0: number;
    u1: number;
    v1: number;
    width: number;
    height: number;
    anchorX: number;
    anchorY: number;
    pixelRatio: number;
}
/**
 * Packs registered icons into a single canvas/texture atlas.
 * Rebuilds only on register/remove/clear — never on object moves.
 */
export declare class ObjectIconAtlas {
    #private;
    private readonly sources;
    private packed;
    private canvas;
    private textureVersion;
    private dirty;
    get version(): number;
    get size(): number;
    has(name: string): boolean;
    register(name: string, source: ManagedIconSource, options?: ManagedIconOptions): this;
    remove(name: string): this;
    clear(): this;
    getPacked(name: string): PackedIcon | null;
    getCanvas(): HTMLCanvasElement | OffscreenCanvas | null;
    names(): string[];
}
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