declare global {
    interface Performance {
        memory: any;
    }
}
/**
 * Hook gl to calculate stats
 */
export declare class Core {
    private readonly gl;
    private drawCallHook;
    private textureHook;
    private shaderHook;
    private requestHook;
    private samplingFrames;
    private samplingIndex;
    private updateCounter;
    private updateTime;
    constructor(gl: WebGLRenderingContext | WebGL2RenderingContext);
    private hook;
    /**
     * reset draw call hook
     */
    reset(): void;
    /**
     * release hook
     */
    release(): void;
    /**
     * update performance data
     */
    update(): PerformanceData;
}
interface PerformanceData {
    fps: number;
    memory: number;
    drawCall: number;
    triangles: number;
    lines: number;
    points: number;
    textures: number;
    shaders: number;
    size: string;
    webglContext: string;
}
export {};