/**
 * Screen-Space Ambient Occlusion pass.
 * 1. Compute noisy AO at full resolution from depth buffer
 * 2. Blur the result with a 4x4 box filter
 * Output: blurred AO texture view (r16float, full-res)
 */
import type { Mat4Type } from '@certe/atmos-math';
export declare class SSAOPass {
    radius: number;
    bias: number;
    intensity: number;
    enabled: boolean;
    private readonly _device;
    private readonly _ssaoPipeline;
    private readonly _blurPipeline;
    private readonly _ssaoBGL;
    private readonly _blurBGL;
    private readonly _paramsBuffer;
    private readonly _noiseTexture;
    private readonly _linearSampler;
    private readonly _kernel;
    private readonly _paramsData;
    private _aoTexture;
    private _aoView;
    private _blurTexture;
    private _blurView;
    private _width;
    private _height;
    private _whiteTexture;
    private _whiteView;
    constructor(device: GPUDevice);
    private _ensureTextures;
    /** Execute SSAO. Returns AO texture view (white if disabled or no depth).
     *  Optional eraseDraw renders non-SSAO geometry to the AO texture writing 1.0,
     *  effectively removing SSAO from those pixels while keeping their depth for occlusion. */
    execute(encoder: GPUCommandEncoder, depthView: GPUTextureView | null, projMatrix: Mat4Type, invProjMatrix: Mat4Type, screenW: number, screenH: number, eraseDraw?: (pass: GPURenderPassEncoder) => void): GPUTextureView;
    destroy(): void;
}
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