probe_point.mjs

// 诊断：某个像素点到底被哪些笔画覆盖（定位"回声/halo"的来源）import fs from 'node:fs';import path from 'node:path';import { fileURLToPath, pathToFileURL } from 'node:url';const here = path.dirname(fileURLToPath(import.meta.url));const root = path.resolve(here, '..');await import(pathToFileURL(path.join(root, 'js/pipeline.js')).href);const rawPath = process.argv[2];const PX = parseInt(process.argv[3], 10), PY = parseInt(process.argv[4], 10);const buf = fs.readFileSync(rawPath);const W = buf.readInt32LE(0), H = buf.readInt32LE(4);const px = new Uint8ClampedArray(buf.buffer, buf.byteOffset + 8, W * H * 4);const withRes = process.argv[5] === "res";const res = await globalThis.ISP_PIPELINE.run(px, W, H,  { colors: 24, returnCanvas: false, returnKeys: false, probe: { x: PX, y: PY }, residual: withRes ? undefined : [] }, () => {});const ti = (PY * W + PX) * 4;console.log(`目标色 @(${PX},${PY}) = ${[px[ti], px[ti + 1], px[ti + 2]].join(',')}`);function inPoly(pts, x, y) {  let inside = false;  for (let i = 0, j = pts.length / 2 - 1; i < pts.length / 2; j = i++) {    const xi = pts[i * 2], yi = pts[i * 2 + 1], xj = pts[j * 2], yj = pts[j * 2 + 1];    if (((yi > y) !== (yj > y)) && (x < (xj - xi) * (y - yi) / (yj - yi) + xi)) inside = !inside;  }  return inside;}let hits = 0;for (let k = 0; k < res.strokes.length; k++) {  const s = res.strokes[k];  const cl = res.clips[s.c];  if (!cl) continue;  if (PX < cl.x || PY < cl.y || PX >= cl.x + cl.w || PY >= cl.y + cl.h) continue;  if (!cl.mask[(PY - cl.y) * cl.w + (PX - cl.x)]) continue;  if (!inPoly(s.rib, PX + 0.5, PY + 0.5)) continue;  hits++;  if (hits <= 12) {    console.log(`#${k} r=${s.r} color=${s.color.join(',')} w=${s.w} pen=${s.pen} ms=${s.ms.toFixed(0)} clip=${s.c}[${cl.x},${cl.y},${cl.w},${cl.h}]`);  }}console.log(`共 ${hits} 笔覆盖该点（最后一笔决定颜色）`);if (res.probe) console.log("该点所属区块:", JSON.stringify(res.probe));