What is Cliprect?

[Haoye Tang]

When I was looking into the Android 9.0 Pixel 2 factory image (9.0.0 (PPR2.180905.005, Sep 2018)) I found this thing in decompiled framework-res.apk/res/anim/activity_open_enter.xml

<?xml version="1.0" encoding="utf-8"?>
<set android:shareInterpolator="false"
  xmlns:android="http://schemas.android.com/apk/res/android">
    <translate android:interpolator="@interpolator/fast_out_slow_in" android:duration="425" android:fromYDelta="4.100001%" android:toYDelta="0.0" />
    <cliprect android:interpolator="@interpolator/fast_out_extra_slow_in" android:duration="425" android:fromBottom="100.0%" android:fromLeft="0.0%" android:fromRight="100.0%" android:fromTop="95.9%" android:toBottom="100.0%" android:toLeft="0.0%" android:toRight="100.0%" android:toTop="0.0%" />
</set>

In line5 you can see there is this "Cliprect" thing which I never know existed before, what is that?