4 files changed, 37 insertions, 0 deletions

diff --git a/core/java/android/view/GLES20Canvas.java b/core/java/android/view/GLES20Canvas.java
index 831b914..1f35c1d 100644
--- a/core/java/android/view/GLES20Canvas.java
+++ b/core/java/android/view/GLES20Canvas.java
@@ -163,6 +163,11 @@ class GLES20Canvas extends HardwareCanvas {
     }
 
     @Override
+    void cancelLayerUpdate(HardwareLayer layer) {
+        nCancelLayerUpdate(mRenderer, ((GLES20RenderLayer) layer).mLayer);
+    }
+
+    @Override
     void flushLayerUpdates() {
         nFlushLayerUpdates(mRenderer);
     }
@@ -191,6 +196,7 @@ class GLES20Canvas extends HardwareCanvas {
     private static native void nClearLayerUpdates(int renderer);
     private static native void nFlushLayerUpdates(int renderer);
     private static native void nPushLayerUpdate(int renderer, int layer);
+    private static native void nCancelLayerUpdate(int renderer, int layer);
 
     ///////////////////////////////////////////////////////////////////////////
     // Canvas management
diff --git a/core/java/android/view/HardwareCanvas.java b/core/java/android/view/HardwareCanvas.java
index 88b0986..259e1cd 100644
--- a/core/java/android/view/HardwareCanvas.java
+++ b/core/java/android/view/HardwareCanvas.java
@@ -202,6 +202,19 @@ public abstract class HardwareCanvas extends Canvas {
     abstract void pushLayerUpdate(HardwareLayer layer);
 
     /**
+     * Cancels a queued layer update. If the specified layer was not
+     * queued for update, this method has no effect.
+     *
+     * @param layer The layer whose update to cancel
+     *
+     * @see #pushLayerUpdate(HardwareLayer)
+     * @see #clearLayerUpdates()
+     *
+     * @hide
+     */
+    abstract void cancelLayerUpdate(HardwareLayer layer);
+
+    /**
      * Immediately executes all enqueued layer updates.
      *
      * @see #pushLayerUpdate(HardwareLayer)
diff --git a/core/java/android/view/HardwareRenderer.java b/core/java/android/view/HardwareRenderer.java
index 4bbf1a6..03428c7 100644
--- a/core/java/android/view/HardwareRenderer.java
+++ b/core/java/android/view/HardwareRenderer.java
@@ -451,10 +451,21 @@ public abstract class HardwareRenderer {
      * @param layer The hardware layer that needs an update
      *
      * @see #flushLayerUpdates()
+     * @see #cancelLayerUpdate(HardwareLayer)
      */
     abstract void pushLayerUpdate(HardwareLayer layer);
 
     /**
+     * Cancels a queued layer update. If the specified layer was not
+     * queued for update, this method has no effect.
+     *
+     * @param layer The layer whose update to cancel
+     *
+     * @see #pushLayerUpdate(HardwareLayer)
+     */
+    abstract void cancelLayerUpdate(HardwareLayer layer);
+
+    /**
      * Forces all enqueued layer updates to be executed immediately.
      *
      * @see #pushLayerUpdate(HardwareLayer)
@@ -2133,6 +2144,11 @@ public abstract class HardwareRenderer {
         }
 
         @Override
+        void cancelLayerUpdate(HardwareLayer layer) {
+            mGlCanvas.cancelLayerUpdate(layer);
+        }
+
+        @Override
         void flushLayerUpdates() {
             mGlCanvas.flushLayerUpdates();
         }
diff --git a/core/java/android/view/View.java b/core/java/android/view/View.java
index c246cd4..525b58f 100644
--- a/core/java/android/view/View.java
+++ b/core/java/android/view/View.java
@@ -12709,6 +12709,8 @@ public class View implements Drawable.Callback, KeyEvent.Callback,
             if (info != null && info.mHardwareRenderer != null &&
                     info.mHardwareRenderer.isEnabled() &&
                     (valid || info.mHardwareRenderer.validate())) {
+
+                info.mHardwareRenderer.cancelLayerUpdate(mHardwareLayer);
                 mHardwareLayer.destroy();
                 mHardwareLayer = null;