/**
 * Eye-Dome Lighting (EDL) post-pass.
 *
 * Standard Potree-style screen-space depth shading: for each pixel, sample
 * a few neighbouring depths at radius R, compute the mean log-depth-diff,
 * and darken proportionally. The result is a soft black halo at silhouettes
 * and gives un-normaled point clouds (and triangle meshes) a strong sense
 * of depth without needing geometric normals.
 *
 * Costs ~9 texture taps per pixel (1 centre + 8 neighbours) at the high
 * quality setting, ~5 at low. Cheap on any modern GPU.
 *
 * Render order: this should run AFTER the existing PostProcessor (which
 * does contact / separation shading) so EDL also darkens those overlays.
 *
 * Reverse-Z note: the main pipeline uses depthCompare 'greater' with
 * clearValue 0.0. So depth=1 → near plane, depth=0 → far plane. A bigger
 * neighbour depth means the neighbour is closer; a smaller neighbour depth
 * means it's further. We darken pixels whose neighbours are further away —
 * i.e. silhouette edges — by clamping `max(0, log(centre) - log(neighbour))`.
 */
import { WebGPUDevice } from './device.js';
export interface EdlPassOptions {
    /** Multiplier on the final darken alpha. 0..3, default 1. */
    strength?: number;
    /** Sample radius in pixels. 1..4, default 1. */
    radiusPx?: number;
    /** When true, sample 8 neighbours; when false, just 4 cardinal. */
    highQuality?: boolean;
}
export interface EdlPassApplyOptions {
    /** Output target — typically the swap chain texture view. */
    targetView: GPUTextureView;
    /** Depth texture view (must be `aspect: 'depth-only'` for stencil formats). */
    depthView: GPUTextureView;
}
export declare class EdlPass {
    private device;
    private colorFormat;
    private isMultisampled;
    private uniformBuffer;
    private uniformStaging;
    private bindGroupLayout;
    private pipeline;
    private cachedBindGroup;
    private cachedDepthView;
    private destroyed;
    constructor(device: WebGPUDevice, sampleCount: number);
    apply(encoder: GPUCommandEncoder, opts: EdlPassApplyOptions, params: Required<EdlPassOptions>): void;
    destroy(): void;
}
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