Shuery
399f99edd7
tools/serve.mjs 本地静态服务 + 测试驱动注入（模拟 WE 下发用户属性、冻结动画相位、藏 canvas 取参考帧） tools/cdp.mjs 最小 CDP 客户端（真实时间等待；--screenshot 的虚拟时间会在骨骼加载完成前就耗尽） tools/shot.mjs 截图/取状态，就绪判据可传入 tools/diff.mjs ffmpeg 差分：PSNR / SSIM / 平均亮度差 tools/capture.mjs 对拍矩阵：壁纸 × 分辨率 × (正常, 藏 canvas) 实测：xilian 1920x1080 spine 层贡献 mean|diff|=26.1/255，kv37 为 10.2/255， 同配置两次截图噪声底 0.68/255。
50 lines
1.7 KiB
JavaScript
50 lines
1.7 KiB
JavaScript
// 两张 PNG 的数值对拍：PSNR / SSIM / 平均亮度差（0-255）。
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// 用法：node tools/diff.mjs <a.png> <b.png> [diff-out.png]
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// 判读：平均差 < 1 视为肉眼无差异；1-3 为细微；> 8 通常意味着构图/内容变了。
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import { spawn } from "node:child_process";
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const [a, b, outPng] = process.argv.slice(2);
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if (!a || !b) {
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console.error("usage: node tools/diff.mjs <a.png> <b.png> [diff-out.png]");
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process.exit(2);
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}
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function ff(args) {
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return new Promise((resolve) => {
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const p = spawn("ffmpeg", ["-hide_banner", "-loglevel", "info", ...args], { stdio: ["ignore", "pipe", "pipe"] });
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let err = "";
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p.stderr.on("data", (d) => (err += d));
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p.stdout.on("data", () => {});
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p.on("close", () => resolve(err));
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});
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}
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const psnr = await ff(["-i", a, "-i", b, "-lavfi", "psnr", "-f", "null", "-"]);
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const ssim = await ff(["-i", a, "-i", b, "-lavfi", "ssim", "-f", "null", "-"]);
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const yavg = await ff([
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"-i", a, "-i", b,
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"-lavfi", "blend=all_mode=difference,signalstats,metadata=print:key=lavfi.signalstats.YAVG",
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"-f", "null", "-",
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]);
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const num = (text, re) => {
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const m = text.match(re);
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return m ? Number(m[1]) : NaN;
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};
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const yavgs = [...yavg.matchAll(/YAVG=([\d.]+)/g)].map((m) => Number(m[1]));
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const report = {
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psnr_avg: /average:inf/.test(psnr) ? Infinity : num(psnr, /average:([\d.]+)/),
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ssim_all: num(ssim, /All:([\d.]+)/),
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mean_abs_diff: yavgs.length ? yavgs[yavgs.length - 1] : NaN,
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};
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console.log(`psnr=${report.psnr_avg} dB ssim=${report.ssim_all} mean|diff|=${report.mean_abs_diff}/255`);
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if (outPng) {
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await ff(["-y", "-i", a, "-i", b, "-lavfi", "blend=all_mode=difference", "-frames:v", "1", outPng]);
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console.log(`diff image -> ${outPng}`);
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}
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