import { MemoryUsage } from './types.js';
export interface GpuTimerResult {
    readonly timeElapsedNs: number;
}
export interface RenderStatistics {
    readonly frameTimeMs: number;
    readonly gpuTimeMs: number;
    readonly cpuFrameTimeMs: number;
    readonly drawCalls: number;
    readonly triangles: number;
    readonly vertices: number;
    readonly textureBinds: number;
    readonly shaderSwitches: number;
    readonly visibleSurfaces: number;
    readonly culledSurfaces: number;
    readonly visibleEntities: number;
    readonly culledEntities: number;
    readonly memoryUsageMB: {
        readonly textures: number;
        readonly geometry: number;
        readonly total: number;
    };
}
export interface FrameStats {
    drawCalls: number;
    vertexCount: number;
    batches: number;
    shaderSwitches: number;
    visibleSurfaces: number;
    culledSurfaces: number;
    visibleEntities: number;
    culledEntities: number;
}
export declare class GpuProfiler {
    private readonly ext;
    private readonly gl;
    private readonly activeQueries;
    private readonly queryPool;
    private currentQuery;
    private lastGpuTimeMs;
    private frameStartTime;
    private lastCpuFrameTimeMs;
    private textureMemoryBytes;
    private bufferMemoryBytes;
    private shaderMemoryBytes;
    constructor(gl: WebGL2RenderingContext);
    get available(): boolean;
    getPerformanceReport(frameStats: FrameStats): RenderStatistics;
    startFrame(): void;
    endFrame(): void;
    trackTextureMemory(bytes: number): void;
    trackBufferMemory(bytes: number): void;
    trackShaderMemory(bytes: number): void;
    getMemoryUsage(): MemoryUsage;
    private getQuery;
    private pollQueries;
    dispose(): void;
}
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