Synchronize surface transaction

Until now the SurfaceControl transaction was being applied
asynchronously, which could lead to it being executed out of sync with
launcher drawing.
This became an issue at higher refresh rates, where frames are produced
at a much faster pace.

In order to fix this issue, we can use BLAST transactions, which are
annotated with a frame number.

Test: record video, go through it manually
Fixes: 194320152
Change-Id: I1636a1ded4f9dd84c54ba12239e3549b92ed7567

1 files changed, 7 insertions, 1 deletions

diff --git a/quickstep/src/com/android/launcher3/statehandlers/DepthController.java b/quickstep/src/com/android/launcher3/statehandlers/DepthController.java
index 5777fb9a7f..68159fafdd 100644
--- a/quickstep/src/com/android/launcher3/statehandlers/DepthController.java
+++ b/quickstep/src/com/android/launcher3/statehandlers/DepthController.java
@@ -26,6 +26,7 @@ import android.animation.ObjectAnimator;
 import android.os.IBinder;
 import android.os.SystemProperties;
 import android.util.FloatProperty;
+import android.view.AttachedSurfaceControl;
 import android.view.CrossWindowBlurListeners;
 import android.view.SurfaceControl;
 import android.view.View;
@@ -316,7 +317,12 @@ public class DepthController implements StateHandler<LauncherState>,
                 transaction.setEarlyWakeupEnd();
                 mInEarlyWakeUp = false;
             }
-            transaction.apply();
+
+            AttachedSurfaceControl rootSurfaceControl =
+                    mLauncher.getRootView().getRootSurfaceControl();
+            if (rootSurfaceControl != null) {
+                rootSurfaceControl.applyTransactionOnDraw(transaction);
+            }
         }
         return true;
     }