Introduce updateVisibility and updateLayout
This is a step to let the client layout its window locally. The ultimate
goal is to reduce the jank while laying out the window.
With the new AIDL methods, we can divide IWindowSession.relayout into:
- IWindowSession#updateVisibility (synchronized binder call)
- To get or update the surface
- To fetch the latest factors about window-layout
- Only called when the view visibility is changed
- WindowLayout#computeFrames (local function call)
- To compute the window frames
- IWindowSession#updateLayout (one way binder call)
- To report the result of layout to the server
In this way, if the view visibility is not changed, the UI thread of
the client won't be blocked by the binder call during relayout.
The local layout project won't be done in a single CL. In order not to
break the existing logic, this CL introduces a flag: LOCAL_LAYOUT. The
flag will be enabled when the logic of local layout is ready.
Bug: 161810301
Bug: 175861051
Test: presubmit (no behavior change)
Change-Id: Ic4b2fc78a318f3a68e1ef8a35d8f3ab705856702
6 files changed