Merge "Hook up shell-transitions screenshotting for recents" into tm-dev

core/java/android/app/IActivityTaskManager.aidl

@@ -267,6 +267,12 @@ interface IActivityTaskManager {
      */
     android.window.TaskSnapshot getTaskSnapshot(int taskId, boolean isLowResolution);
 
+    /**
+     * @param taskId the id of the task to take a snapshot of
+     * @return a graphic buffer representing a screenshot of a task
+     */
+    android.window.TaskSnapshot takeTaskSnapshot(int taskId);
+
     /**
      * Return the user id of last resumed activity.
      */

packages/SystemUI/shared/src/com/android/systemui/shared/system/RemoteTransitionCompat.java

@@ -47,6 +47,7 @@ import android.window.IRemoteTransition;
 import android.window.IRemoteTransitionFinishedCallback;
 import android.window.PictureInPictureSurfaceTransaction;
 import android.window.RemoteTransition;
+import android.window.TaskSnapshot;
 import android.window.TransitionFilter;
 import android.window.TransitionInfo;
 import android.window.WindowContainerToken;
@@ -322,7 +323,16 @@ public class RemoteTransitionCompat implements Parcelable {
         }
 
         @Override public ThumbnailData screenshotTask(int taskId) {
-            return mWrapped != null ? mWrapped.screenshotTask(taskId) : null;
+            try {
+                final TaskSnapshot snapshot =
+                        ActivityTaskManager.getService().takeTaskSnapshot(taskId);
+                if (snapshot != null) {
+                    return new ThumbnailData(snapshot);
+                }
+            } catch (RemoteException e) {
+                Log.e(TAG, "Failed to screenshot task", e);
+            }
+            return null;
         }
 
         @Override public void setInputConsumerEnabled(boolean enabled) {

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

@@ -3599,25 +3599,41 @@ public class ActivityTaskManagerService extends IActivityTaskManager.Stub {
         mAmInternal.enforceCallingPermission(READ_FRAME_BUFFER, "getTaskSnapshot()");
         final long ident = Binder.clearCallingIdentity();
         try {
-            return getTaskSnapshot(taskId, isLowResolution, true /* restoreFromDisk */);
+            final Task task;
+            synchronized (mGlobalLock) {
+                task = mRootWindowContainer.anyTaskForId(taskId,
+                        MATCH_ATTACHED_TASK_OR_RECENT_TASKS);
+                if (task == null) {
+                    Slog.w(TAG, "getTaskSnapshot: taskId=" + taskId + " not found");
+                    return null;
+                }
+            }
+            // Don't call this while holding the lock as this operation might hit the disk.
+            return mWindowManager.mTaskSnapshotController.getSnapshot(taskId, task.mUserId,
+                    true /* restoreFromDisk */, isLowResolution);
         } finally {
             Binder.restoreCallingIdentity(ident);
         }
     }
 
-    private TaskSnapshot getTaskSnapshot(int taskId, boolean isLowResolution,
-            boolean restoreFromDisk) {
-        final Task task;
-        synchronized (mGlobalLock) {
-            task = mRootWindowContainer.anyTaskForId(taskId,
-                    MATCH_ATTACHED_TASK_OR_RECENT_TASKS);
-            if (task == null) {
-                Slog.w(TAG, "getTaskSnapshot: taskId=" + taskId + " not found");
-                return null;
+    @Override
+    public TaskSnapshot takeTaskSnapshot(int taskId) {
+        mAmInternal.enforceCallingPermission(READ_FRAME_BUFFER, "takeTaskSnapshot()");
+        final long ident = Binder.clearCallingIdentity();
+        try {
+            synchronized (mGlobalLock) {
+                final Task task = mRootWindowContainer.anyTaskForId(taskId,
+                        MATCH_ATTACHED_TASK_OR_RECENT_TASKS);
+                if (task == null || !task.isVisible()) {
+                    Slog.w(TAG, "takeTaskSnapshot: taskId=" + taskId + " not found or not visible");
+                    return null;
+                }
+                return mWindowManager.mTaskSnapshotController.captureTaskSnapshot(
+                        task, false /* snapshotHome */);
             }
+        } finally {
+            Binder.restoreCallingIdentity(ident);
         }
-        // Don't call this while holding the lock as this operation might hit the disk.
-        return task.getSnapshot(isLowResolution, restoreFromDisk);
     }
 
     /** Return the user id of the last resumed activity. */
@@ -6559,8 +6575,7 @@ public class ActivityTaskManagerService extends IActivityTaskManager.Stub {
         @Override
         public TaskSnapshot getTaskSnapshotBlocking(
                 int taskId, boolean isLowResolution) {
-            return ActivityTaskManagerService.this.getTaskSnapshot(taskId, isLowResolution,
-                    true /* restoreFromDisk */);
+            return ActivityTaskManagerService.this.getTaskSnapshot(taskId, isLowResolution);
         }
 
         @Override

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

@@ -967,17 +967,6 @@ class Task extends TaskFragment {
                 || targetWindowingMode == WINDOWING_MODE_FREEFORM;
     }
 
-    /**
-     * DO NOT HOLD THE ACTIVITY MANAGER LOCK WHEN CALLING THIS METHOD!
-     */
-    TaskSnapshot getSnapshot(boolean isLowResolution, boolean restoreFromDisk) {
-
-        // TODO: Move this to {@link TaskWindowContainerController} once recent tasks are more
-        // synchronized between AM and WM.
-        return mAtmService.mWindowManager.getTaskSnapshot(mTaskId, mUserId, isLowResolution,
-                restoreFromDisk);
-    }
-
     void touchActiveTime() {
         lastActiveTime = SystemClock.elapsedRealtime();
     }