From bc57cd1b248bf23e443581f9fe44167c94699ce8 Mon Sep 17 00:00:00 2001
From: Craig Mautner <cmautner@google.com>
Date: Mon, 19 Aug 2013 15:47:42 -0700
Subject: Notify ViewRootImpl when it's safe to modify Canvas.

When Activity.convert{To|From}Translucent() is called the
ViewRootImpl is now notified when it is safe to convert the Canvas
from translucent to opaque and back to translucent. This will make
it possible to save resources when compositing opaque layers.

Fixes bug 10349536.

Change-Id: I7282aee1d54601fb00611d20be204bf164d873f6
---
 .../java/com/android/server/am/ActivityManagerService.java   | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

(limited to 'services')

diff --git a/services/java/com/android/server/am/ActivityManagerService.java b/services/java/com/android/server/am/ActivityManagerService.java
index be6119d..cc9a72c 100644
--- a/services/java/com/android/server/am/ActivityManagerService.java
+++ b/services/java/com/android/server/am/ActivityManagerService.java
@@ -8152,18 +8152,20 @@ public final class ActivityManagerService extends ActivityManagerNative
     }
 
     @Override
-    public void convertFromTranslucent(IBinder token) {
+    public boolean convertFromTranslucent(IBinder token) {
         final long origId = Binder.clearCallingIdentity();
         try {
             synchronized (this) {
                 final ActivityRecord r = ActivityRecord.isInStackLocked(token);
                 if (r == null) {
-                    return;
+                    return false;
                 }
                 if (r.changeWindowTranslucency(true)) {
                     mWindowManager.setAppFullscreen(token, true);
                     mStackSupervisor.ensureActivitiesVisibleLocked(null, 0);
+                    return true;
                 }
+                return false;
             }
         } finally {
             Binder.restoreCallingIdentity(origId);
@@ -8171,19 +8173,21 @@ public final class ActivityManagerService extends ActivityManagerNative
     }
 
     @Override
-    public void convertToTranslucent(IBinder token) {
+    public boolean convertToTranslucent(IBinder token) {
         final long origId = Binder.clearCallingIdentity();
         try {
             synchronized (this) {
                 final ActivityRecord r = ActivityRecord.isInStackLocked(token);
                 if (r == null) {
-                    return;
+                    return false;
                 }
                 if (r.changeWindowTranslucency(false)) {
                     r.task.stack.convertToTranslucent(r);
                     mWindowManager.setAppFullscreen(token, false);
                     mStackSupervisor.ensureActivitiesVisibleLocked(null, 0);
+                    return true;
                 }
+                return false;
             }
         } finally {
             Binder.restoreCallingIdentity(origId);
-- 
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