import { PerformanceMetrics, PerformanceOptions } from '../types';
export declare class PerformanceMonitor {
    private metrics;
    private options;
    private fpsHistory;
    private lastFrameTime;
    private frameCount;
    private monitoringStartTime;
    constructor(options?: PerformanceOptions);
    /**
     * Update performance metrics
     */
    update(activeParticleCount: number, poolSize: number): void;
    /**
     * Adapt quality based on performance
     */
    private adaptQuality;
    /**
     * Get current quality settings
     */
    getCurrentQualitySettings(): {
        maxParticles: number;
        particleScale?: number;
    };
    /**
     * Get current metrics
     */
    getMetrics(): PerformanceMetrics;
    /**
     * Should spawn particle based on current performance
     */
    shouldSpawnParticle(): boolean;
    /**
     * Get particle scale modifier based on quality
     */
    getParticleScaleModifier(): number;
    /**
     * Reset metrics
     */
    reset(): void;
    /**
     * Get performance report
     */
    getReport(): string;
}
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