/**
 * ShadowManager — owns all shadow pass state and orchestrates multi-shadow
 * rendering for up to 2 dir, 2 point, and 4 spot shadow casters.
 */
import type { Scene } from '@certe/atmos-core';
import type { Mat4Type } from '@certe/atmos-math';
import type { SceneLightData } from './light.js';
import { DirectionalLight } from './directional-light.js';
export interface ShadowManagerResult {
    bindGroup: GPUBindGroup;
}
export declare class ShadowManager {
    private readonly _device;
    private readonly _objectBGL;
    private readonly _shadowBGL;
    private _dirPairs;
    private _pointPasses;
    private _spotPasses;
    private _uniformBuffer;
    private readonly _uniformData;
    private _bindGroup;
    private _dummy;
    private _dirty;
    private readonly _dirSlotLights;
    private readonly _pointSlotLights;
    private readonly _spotSlotLights;
    private readonly _dirVP0;
    private readonly _dirVP1;
    constructor(device: GPUDevice, objectBGL: GPUBindGroupLayout, shadowBGL: GPUBindGroupLayout);
    update(encoder: GPUCommandEncoder, scene: Scene, cameraEye: Float32Array, sceneLights: SceneLightData, extraDraw: ((pass: GPURenderPassEncoder) => void) | undefined, computeCascadeVP: (out: Mat4Type, light: DirectionalLight, eye: Float32Array, size: number, dist: number) => void): ShadowManagerResult;
    /** Select up to MAX_DIR_SHADOW_SLOTS dir lights by highest intensity. */
    private _selectDirLights;
    private _selectClosest;
    private _syncSlot;
    private _syncDirPasses;
    private _syncPointPasses;
    private _syncSpotPasses;
    private _executeDirPasses;
    private _executePointPasses;
    private _executeSpotPasses;
    private _writeUniforms;
    private _writeSlotMap;
    private _buildBindGroup;
    destroy(): void;
}
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