commit 8fc721bb338c6d13e8758c2139d073acab86e3e2
author Vishnu Nair <vishnun@google.com> Thu Dec 22 20:06:32 2022 +0000
committer Vishnu Nair <vishnun@google.com> Thu Dec 22 22:36:04 2022 +0000
tree 5ed9d431326907c0ab5e57b82af187c5a8e45030
parent 42afe5fa137aacc2fc5d9bdf12052dc455b769ca

SF: Introduce LayerSnapshot and LayerSnapshotBuilder

Create a builder that walks through the layer hierarchy
to build an ordered list of LayerSnapshots that can be
passed on to CompositionEngine.

This builder does a minimum amount of work to update
an existing set of snapshots based on hierarchy changes
and RequestedLayerState changes.

The builder also introduces a fast path to update
snapshots when there are only buffer updates.

Additionally, pull out LayerSnapshot class from LayerFE
and move it to frontend package.

Bug: 238781169
Test: presubmit
Change-Id: I3fbd6d60968950df2ee97d975c72f9e0aa31b007

services/surfaceflinger/Android.bp

diff --git a/services/surfaceflinger/Android.bp b/services/surfaceflinger/Android.bp
index 9f7a687..d7bdd60 100644
--- a/services/surfaceflinger/Android.bp
+++ b/services/surfaceflinger/Android.bp
@@ -157,6 +157,8 @@
         "EventLog/EventLog.cpp",
         "FrontEnd/LayerCreationArgs.cpp",
         "FrontEnd/LayerHandle.cpp",
+        "FrontEnd/LayerSnapshot.cpp",
+        "FrontEnd/LayerSnapshotBuilder.cpp",
         "FrontEnd/LayerHierarchy.cpp",
         "FrontEnd/LayerLifecycleManager.cpp",
         "FrontEnd/RequestedLayerState.cpp",