export interface SdfContentExtent {
    hwf: number;
    hhf: number;
}
/**
 * Content half-extents for an SVG SDF url, or null until scanned (caller falls back to full field).
 * Triggers a one-shot async scan on first request; `onReady` (if given) is invoked once when that
 * scan resolves, so the renderer can re-resolve the node's anchored position against the real extent.
 */
export declare function getSdfContentBounds(url: string, onReady?: () => void): SdfContentExtent | null;
/** True once `url` has been scanned (hit or full-field miss) — i.e. `getSdfContentBounds` is final. */
export declare function isSdfContentBoundsScanned(url: string): boolean;
//# sourceMappingURL=sdfBounds.d.ts.map