Merge "Finish sync for unchanged drawn window" into tm-qpr-dev

services/core/java/com/android/server/wm/WindowContainer.java

@@ -3759,7 +3759,6 @@ class WindowContainer<E extends WindowContainer> extends ConfigurationContainer<
         if (mSyncState == SYNC_STATE_NONE) return false;
         mSyncState = SYNC_STATE_READY;
         mSyncMethodOverride = BLASTSyncEngine.METHOD_UNDEFINED;
-        mWmService.mWindowPlacerLocked.requestTraversal();
         ProtoLog.v(WM_DEBUG_SYNC_ENGINE, "onSyncFinishedDrawing %s", this);
         return true;
     }
@@ -3829,8 +3828,8 @@ class WindowContainer<E extends WindowContainer> extends ConfigurationContainer<
 
     /**
      * Checks if the subtree rooted at this container is finished syncing (everything is ready or
-     * not visible). NOTE, this is not const: it will cancel/prepare itself depending on its state
-     * in the hierarchy.
+     * not visible). NOTE, this is not const: it may cancel/prepare/complete itself depending on
+     * its state in the hierarchy.
      *
      * @return {@code true} if this subtree is finished waiting for sync participants.
      */

services/core/java/com/android/server/wm/WindowManagerService.java

@@ -2587,12 +2587,6 @@ public class WindowManagerService extends IWindowManager.Stub
                         && win.mSyncSeqId > lastSyncSeqId) {
                     maybeSyncSeqId = win.shouldSyncWithBuffers() ? win.mSyncSeqId : -1;
                     win.markRedrawForSyncReported();
-                    if (win.mSyncState == WindowContainer.SYNC_STATE_WAITING_FOR_DRAW
-                            && winAnimator.mDrawState == WindowStateAnimator.HAS_DRAWN
-                            && maybeSyncSeqId < 0) {
-                        // Do not wait for a drawn window which won't report draw.
-                        win.onSyncFinishedDrawing();
-                    }
                 } else {
                     maybeSyncSeqId = -1;
                 }

services/core/java/com/android/server/wm/WindowState.java

@@ -6004,12 +6004,16 @@ class WindowState extends WindowContainer<WindowState> implements WindowManagerP
 
     @Override
     boolean isSyncFinished() {
-        if (mSyncState == SYNC_STATE_WAITING_FOR_DRAW && mViewVisibility != View.VISIBLE
-                && !isVisibleRequested()) {
+        if (!isVisibleRequested()) {
             // Don't wait for invisible windows. However, we don't alter the state in case the
             // window becomes visible while the sync group is still active.
             return true;
         }
+        if (mSyncState == SYNC_STATE_WAITING_FOR_DRAW && mWinAnimator.mDrawState == HAS_DRAWN
+                && !mRedrawForSyncReported && !mWmService.mResizingWindows.contains(this)) {
+            // Complete the sync state immediately for a drawn window that doesn't need to redraw.
+            onSyncFinishedDrawing();
+        }
         return super.isSyncFinished();
     }
 
@@ -6060,6 +6064,7 @@ class WindowState extends WindowContainer<WindowState> implements WindowManagerP
         final boolean hasSyncHandlers = executeDrawHandlers(postDrawTransaction, syncSeqId);
 
         boolean skipLayout = false;
+        boolean layoutNeeded = false;
         // Control the timing to switch the appearance of window with different rotations.
         final AsyncRotationController asyncRotationController =
                 mDisplayContent.getAsyncRotationController();
@@ -6072,7 +6077,7 @@ class WindowState extends WindowContainer<WindowState> implements WindowManagerP
         } else if (syncActive) {
             // Currently in a Sync that is using BLAST.
             if (!syncStillPending) {
-                onSyncFinishedDrawing();
+                layoutNeeded = onSyncFinishedDrawing();
             }
             if (postDrawTransaction != null) {
                 mSyncTransaction.merge(postDrawTransaction);
@@ -6081,10 +6086,10 @@ class WindowState extends WindowContainer<WindowState> implements WindowManagerP
             }
         } else if (useBLASTSync()) {
             // Sync that is not using BLAST
-            onSyncFinishedDrawing();
+            layoutNeeded = onSyncFinishedDrawing();
         }
 
-        final boolean layoutNeeded =
+        layoutNeeded |=
                 mWinAnimator.finishDrawingLocked(postDrawTransaction, mClientWasDrawingForSync);
         mClientWasDrawingForSync = false;
         // We always want to force a traversal after a finish draw for blast sync.

services/tests/wmtests/src/com/android/server/wm/SyncEngineTests.java

@@ -31,6 +31,7 @@ import static com.android.server.wm.WindowState.BLAST_TIMEOUT_DURATION;
 
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertTrue;
 import static org.mockito.ArgumentMatchers.any;
 import static org.mockito.ArgumentMatchers.anyInt;
 import static org.mockito.ArgumentMatchers.eq;
@@ -108,9 +109,7 @@ public class SyncEngineTests extends WindowTestsBase {
         bse.onSurfacePlacement();
         verify(listener, times(0)).onTransactionReady(anyInt(), any());
 
-        mockWC.onSyncFinishedDrawing();
-        // Make sure the second traversal is requested.
-        verify(mWm.mWindowPlacerLocked, times(2)).requestTraversal();
+        assertTrue(mockWC.onSyncFinishedDrawing());
         bse.onSurfacePlacement();
         verify(listener, times(1)).onTransactionReady(eq(id), notNull());
     }

services/tests/wmtests/src/com/android/server/wm/WindowOrganizerTests.java

@@ -1240,7 +1240,8 @@ public class WindowOrganizerTests extends WindowTestsBase {
         assertTrue(w1.useBLASTSync());
         assertTrue(w2.useBLASTSync());
 
-        w1.immediatelyNotifyBlastSync();
+        // A drawn window can complete the sync state automatically.
+        w1.mWinAnimator.mDrawState = WindowStateAnimator.HAS_DRAWN;
         mWm.mSyncEngine.onSurfacePlacement();
         verify(mockCallback).onTransactionReady(anyInt(), any());
         assertFalse(w1.useBLASTSync());