tree c1bfc76310bf056120b1e43c18e27d6ad90ba997
parent 82d94d9e9ee4eb6b14db3c8df2f47dcae5ce4ab0
author Romain Guy <romainguy@android.com> 1242067846 -0700
committer Romain Guy <romainguy@android.com> 1242067846 -0700

Fixes #1596240. Optimize invalidate/draw passes by marking opaque views and avoiding drawing them. Whenever a View requests an invalidate its parent check whether the view is opaque or not. When the view is not opaque, the framework behaves as it used to. However, when a view is opaque, the parent marks itself as being dirty because of an opaque view. Its parent then does the same, and so on. When the framework then starts drawing the views, it does not draw views marked as dirty opaque. If a view is dirty opaque and receives an invalidate request from a non-opaque view, it then clears the dirty opaque flag and behaves as before.