// lib/post/webgl/pixel.ts
// Pixelation — renders the scene at a chunky pixel grid with edge accents.
// Wraps three's official RenderPixelatedPass. Mirrors the WebGPU `pixel` effect.

import { RenderPixelatedPass } from 'three/addons/postprocessing/RenderPixelatedPass.js'
import type { Pass } from 'three/addons/postprocessing/Pass.js'
import type { WebGlPassContext } from './types.js'


export interface PixelOptions {
  pixelSize?:          number
  normalEdgeStrength?: number
  depthEdgeStrength?:  number
}

export function createPixel (ctx: WebGlPassContext, options: PixelOptions = {}): Pass {
  const { pixelSize = 6, normalEdgeStrength = 0.3, depthEdgeStrength = 0.4 } = options
  return new RenderPixelatedPass(pixelSize, ctx.scene, ctx.camera, { normalEdgeStrength, depthEdgeStrength })
}

// perf: cheap-medium. Re-renders the scene once at reduced resolution.