Fix destroyHardwareResources

 The UI thread needs to know whether or not the display list is
 valid, so bring back View.destroyHardwareResources and instead
 have the native side assert that View did the right thing

Change-Id: I4f8dee6e9c13ec7ab520becdc5cfe20e92a76f8f

3 files changed, 10 insertions, 5 deletions

diff --git a/core/java/android/view/ThreadedRenderer.java b/core/java/android/view/ThreadedRenderer.java
index 57d1beb..fa4564e 100644
--- a/core/java/android/view/ThreadedRenderer.java
+++ b/core/java/android/view/ThreadedRenderer.java
@@ -127,6 +127,8 @@ public class ThreadedRenderer extends HardwareRenderer {
     @Override
     void destroyHardwareResources(View view) {
         destroyResources(view);
+        // mRootNode belongs to us and not a view, so we need to destroy it
+        mRootNode.destroyDisplayListData();
         nDestroyHardwareResources(mNativeProxy);
     }
 
diff --git a/core/java/android/view/View.java b/core/java/android/view/View.java
index 3b2e1d1..0ee9e06 100644
--- a/core/java/android/view/View.java
+++ b/core/java/android/view/View.java
@@ -13625,9 +13625,7 @@ public class View implements Drawable.Callback, KeyEvent.Callback,
      * @hide
      */
     protected void destroyHardwareResources() {
-        // Intentionally empty. RenderNode's lifecycle is now fully managed
-        // by the hardware renderer.
-        // However some subclasses (eg, WebView, TextureView) still need this signal
+        resetDisplayList();
     }
 
     /**
diff --git a/libs/hwui/RenderNode.cpp b/libs/hwui/RenderNode.cpp
index 89105ea..3cf625f 100644
--- a/libs/hwui/RenderNode.cpp
+++ b/libs/hwui/RenderNode.cpp
@@ -211,7 +211,8 @@ void RenderNode::prepareTreeImpl(TreeInfo& info) {
         // This will also release the hardware layer if we have one as
         // isRenderable() will return false, thus causing pushLayerUpdate
         // to recycle the hardware layer
-        setStagingDisplayList(NULL);
+        LOG_ALWAYS_FATAL_IF(mStagingDisplayListData || (mDisplayListData && !mNeedsDisplayListDataSync),
+                "View.destroyHardwareResources wasn't called!");
         break;
     }
 
@@ -260,7 +261,11 @@ void RenderNode::pushStagingDisplayListChanges(TreeInfo& info) {
         mNeedsDisplayListDataSync = false;
         // Do a push pass on the old tree to handle freeing DisplayListData
         // that are no longer used
-        TreeInfo oldTreeInfo(TreeInfo::MODE_MAYBE_DETACHING, info);
+        TreeInfo::TraversalMode mode = TreeInfo::MODE_MAYBE_DETACHING;
+        if (CC_UNLIKELY(info.mode == TreeInfo::MODE_DESTROY_RESOURCES)) {
+            mode = TreeInfo::MODE_DESTROY_RESOURCES;
+        }
+        TreeInfo oldTreeInfo(mode, info);
         prepareSubTree(oldTreeInfo, mDisplayListData);
         delete mDisplayListData;
         mDisplayListData = mStagingDisplayListData;