/**
 * @nexart/ui-renderer - FPS Throttle
 *
 * Simple FPS cap for continuous preview animation.
 * No frame limits, no time limits — just throttled rendering.
 *
 * ╔══════════════════════════════════════════════════════════════════════════╗
 * ║  FPS THROTTLE — CONTINUOUS ANIMATION                                     ║
 * ║                                                                          ║
 * ║  Target FPS: 8 (125ms per frame)                                         ║
 * ║  No frame limit — runs until stop() is called                            ║
 * ║  No time limit — runs indefinitely                                       ║
 * ╚══════════════════════════════════════════════════════════════════════════╝
 */
import { type FpsThrottleState } from './preview-types';
/**
 * Create a new FPS throttle state
 */
export declare function createFpsThrottle(): FpsThrottleState;
/**
 * Check if enough time has passed to render the next frame.
 * Returns true if we should render, false if we should skip this RAF tick.
 */
export declare function shouldRenderFrame(throttle: FpsThrottleState): boolean;
/**
 * Record that a frame was rendered (updates last frame time)
 */
export declare function recordFrame(throttle: FpsThrottleState): void;
/**
 * Reset the throttle for a new render session
 */
export declare function resetThrottle(throttle: FpsThrottleState): void;
/**
 * @deprecated Legacy type alias for backward compatibility.
 * Use FpsThrottleState instead.
 */
export type FrameBudgetState = FpsThrottleState;
/** @deprecated Use createFpsThrottle instead */
export declare function createFrameBudget(): FpsThrottleState;
/**
 * @deprecated Use shouldRenderFrame instead.
 *
 * COMPATIBILITY NOTE: This now delegates to shouldRenderFrame.
 * For legacy code that interprets `false` as "budget exhausted forever",
 * this will work correctly because:
 * - Returns true when enough time has passed (ready to render)
 * - Returns false when throttled (wait for next tick)
 * - Never permanently exhausts like the old budget system
 */
export declare function canRenderFrame(throttle: FpsThrottleState): boolean;
/** @deprecated Use resetThrottle instead */
export declare function resetBudget(throttle: FpsThrottleState): void;
/** @deprecated No longer used — removed frame stride. Always returns false. */
export declare function shouldSkipFrame(_frameCount: number): boolean;
/** @deprecated No longer tracked. Returns 0. */
export declare function getElapsedMs(_throttle: FpsThrottleState): number;
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