# Tigris v2.0.24

## 中文

- **极致液态玻璃不再延迟：** 透镜与背景在同一个后台任务里准备好，同一帧提交，并按背景相同的时长和曲线交叉淡入。进入设置、更换背景、进入/退出 Top Shelf 时，玻璃不再先显示平色或晚于背景跳变。Sony XR-55A80J 实测：设置页从约 1.05–1.27 秒稳定缩短到 0.13–0.22 秒；退出 Top Shelf 时 Dock 与背景同帧完成（此前 Dock 晚约 0.2 秒）。
- **设置页预备：** 设置页背景与透镜按背景、图片修改时间、屏幕尺寸缓存两份，回到桌面后在后台预热；低端设备（Android 11 以下、内存小于 2.5 GB 或少于 4 核）不预热，内存紧张时释放缓存。
- **绘制开销降低（画面不变）：** 色散透镜不再为每块玻璃开离屏图层，平坦中心只画一遍；Android 10+ 的玻璃文字墨水直接混合，不再逐行开图层；滚动时只对屏幕附近的玻璃取色与重绘。同一设置页滚动场景中，RenderThread 每帧命令生成中位数约 8.2 → 4.7 ms，主线程 p95 约 13.9 → 3.4 ms。均经截屏像素对比确认外观一致；并修正了原透镜圆角处的一圈暗色锯齿。色调现在先于边缘折射应用，与参考材质的 backdrop-filter 顺序一致。
- 仍有限制：GPU 从空闲唤醒的按键首帧在极致玻璃下偶有超时；未通过降低折射质量来消除。普通玻璃模式不受影响。

Android 9+，versionCode **31**；保持原应用 ID、两种安装类型和稳定签名。对应类型覆盖升级保留数据。只在 Sony XR-55A80J（Android 12）实机测量；其他机型未验证。

- Standard: `Tigris-v2.0.24.apk`
- Guard: `Tigris-guard-v2.0.24.apk`
- SHA-256: `SHA256SUMS-v2.0.24.txt`

## English

- **Extreme Liquid Glass without lag:** the lens is prepared by the same background job as the backdrop, committed in the same frame and cross-faded with the backdrop's duration and curve. Settings, background changes and Top Shelf transitions no longer show flat or late glass. Measured on a Sony XR-55A80J: Settings settles in 0.13–0.22 s instead of 1.05–1.27 s; leaving Top Shelf, the Dock finishes with the backdrop instead of ~0.2 s later.
- **Settings prepared ahead:** the Settings backdrop and lens are cached (two entries, keyed by background, picture timestamp and screen size) and warmed in the background from Home. Low-end devices (below Android 11, under 2.5 GB RAM or fewer than 4 cores) skip warming; caches are released under memory pressure.
- **Lower drawing cost, same picture:** the chromatic lens no longer allocates an offscreen layer per surface and draws its flat middle once; on Android 10+ glass ink text blends directly instead of per-label layers; scrolling re-samples and re-records only glass near the viewport. In the same Settings scroll, median RenderThread command time fell from ~8.2 to ~4.7 ms and UI-thread p95 from ~13.9 to ~3.4 ms. Screenshot diffs confirm the appearance is unchanged, except that a dark stepped line at lens corners is gone. Tone is now applied before the rim bends the backdrop, matching the reference backdrop-filter order.
- Known limit: the first frame after a key press can still miss its deadline in extreme glass while the GPU wakes from idle; refraction quality was not reduced to hide it. Ordinary glass is unaffected.

Android 9+, versionCode **31**, matching Standard/Guard upgrades with the existing signing identity. Measured only on a Sony XR-55A80J (Android 12); other TVs are unverified.