Merge "keystore: remove old APIs" into jb-mr2-dev
diff --git a/api/current.txt b/api/current.txt
index 1d30f51..d1be295 100644
--- a/api/current.txt
+++ b/api/current.txt
@@ -852,6 +852,7 @@
     field public static final int reqNavigation = 16843306; // 0x101022a
     field public static final int reqTouchScreen = 16843303; // 0x1010227
     field public static final int required = 16843406; // 0x101028e
+    field public static final int requiredAccountType = 16843734; // 0x10103d6
     field public static final int requiredForAllUsers = 16843728; // 0x10103d0
     field public static final int requiresFadingEdge = 16843685; // 0x10103a5
     field public static final int requiresSmallestWidthDp = 16843620; // 0x1010364
@@ -4195,6 +4196,7 @@
     method public final boolean performGlobalAction(int);
     method public void setOnAccessibilityEventListener(android.app.UiAutomation.OnAccessibilityEventListener);
     method public boolean setRotation(int);
+    method public void setRunAsMonkey(boolean);
     method public final void setServiceInfo(android.accessibilityservice.AccessibilityServiceInfo);
     method public android.graphics.Bitmap takeScreenshot();
     method public void waitForIdle(long, long) throws java.util.concurrent.TimeoutException;
@@ -11815,10 +11817,10 @@
     method public void seekTo(long, int);
     method public void selectTrack(int);
     method public final void setDataSource(android.content.Context, android.net.Uri, java.util.Map<java.lang.String, java.lang.String>) throws java.io.IOException;
-    method public final void setDataSource(java.lang.String, java.util.Map<java.lang.String, java.lang.String>);
-    method public final void setDataSource(java.lang.String);
-    method public final void setDataSource(java.io.FileDescriptor);
-    method public final void setDataSource(java.io.FileDescriptor, long, long);
+    method public final void setDataSource(java.lang.String, java.util.Map<java.lang.String, java.lang.String>) throws java.io.IOException;
+    method public final void setDataSource(java.lang.String) throws java.io.IOException;
+    method public final void setDataSource(java.io.FileDescriptor) throws java.io.IOException;
+    method public final void setDataSource(java.io.FileDescriptor, long, long) throws java.io.IOException;
     method public void unselectTrack(int);
     field public static final int SAMPLE_FLAG_ENCRYPTED = 2; // 0x2
     field public static final int SAMPLE_FLAG_SYNC = 1; // 0x1
@@ -12265,13 +12267,17 @@
     ctor public RemoteControlClient(android.app.PendingIntent);
     ctor public RemoteControlClient(android.app.PendingIntent, android.os.Looper);
     method public android.media.RemoteControlClient.MetadataEditor editMetadata(boolean);
+    method public void setOnGetPlaybackPositionListener(android.media.RemoteControlClient.OnGetPlaybackPositionListener);
+    method public void setPlaybackPositionUpdateListener(android.media.RemoteControlClient.OnPlaybackPositionUpdateListener);
     method public void setPlaybackState(int);
+    method public void setPlaybackState(int, long, float);
     method public void setTransportControlFlags(int);
     field public static final int FLAG_KEY_MEDIA_FAST_FORWARD = 64; // 0x40
     field public static final int FLAG_KEY_MEDIA_NEXT = 128; // 0x80
     field public static final int FLAG_KEY_MEDIA_PAUSE = 16; // 0x10
     field public static final int FLAG_KEY_MEDIA_PLAY = 4; // 0x4
     field public static final int FLAG_KEY_MEDIA_PLAY_PAUSE = 8; // 0x8
+    field public static final int FLAG_KEY_MEDIA_POSITION_UPDATE = 256; // 0x100
     field public static final int FLAG_KEY_MEDIA_PREVIOUS = 1; // 0x1
     field public static final int FLAG_KEY_MEDIA_REWIND = 2; // 0x2
     field public static final int FLAG_KEY_MEDIA_STOP = 32; // 0x20
@@ -12295,6 +12301,14 @@
     field public static final int BITMAP_KEY_ARTWORK = 100; // 0x64
   }
 
+  public static abstract interface RemoteControlClient.OnGetPlaybackPositionListener {
+    method public abstract long onGetPlaybackPosition();
+  }
+
+  public static abstract interface RemoteControlClient.OnPlaybackPositionUpdateListener {
+    method public abstract void onPlaybackPositionUpdate(long);
+  }
+
   public class Ringtone {
     method public int getStreamType();
     method public java.lang.String getTitle(android.content.Context);
@@ -17079,8 +17093,8 @@
     method public java.lang.String getUserName();
     method public android.os.Bundle getUserRestrictions();
     method public android.os.Bundle getUserRestrictions(android.os.UserHandle);
+    method public boolean isLinkedUser();
     method public boolean isUserAGoat();
-    method public boolean isUserLimited();
     method public boolean isUserRunning(android.os.UserHandle);
     method public boolean isUserRunningOrStopping(android.os.UserHandle);
     method public void setUserRestriction(java.lang.String, boolean);
@@ -20196,11 +20210,13 @@
   public class RenderScript {
     method public void contextDump();
     method public static android.renderscript.RenderScript create(android.content.Context);
+    method public static android.renderscript.RenderScript create(android.content.Context, android.renderscript.RenderScript.ContextType);
     method public void destroy();
     method public void finish();
     method public final android.content.Context getApplicationContext();
     method public android.renderscript.RenderScript.RSErrorHandler getErrorHandler();
     method public android.renderscript.RenderScript.RSMessageHandler getMessageHandler();
+    method public void sendMessage(int, int[]);
     method public void setErrorHandler(android.renderscript.RenderScript.RSErrorHandler);
     method public void setMessageHandler(android.renderscript.RenderScript.RSMessageHandler);
     method public void setPriority(android.renderscript.RenderScript.Priority);
@@ -20363,6 +20379,13 @@
   public abstract class ScriptIntrinsic extends android.renderscript.Script {
   }
 
+  public final class ScriptIntrinsic3DLUT extends android.renderscript.ScriptIntrinsic {
+    method public static android.renderscript.ScriptIntrinsic3DLUT create(android.renderscript.RenderScript, android.renderscript.Element);
+    method public void forEach(android.renderscript.Allocation, android.renderscript.Allocation);
+    method public android.renderscript.Script.KernelID getKernelID();
+    method public void setLUT(android.renderscript.Allocation);
+  }
+
   public class ScriptIntrinsicBlend extends android.renderscript.ScriptIntrinsic {
     method public static android.renderscript.ScriptIntrinsicBlend create(android.renderscript.RenderScript, android.renderscript.Element);
     method public void forEachAdd(android.renderscript.Allocation, android.renderscript.Allocation);
@@ -20482,6 +20505,7 @@
     method public android.renderscript.Element getElement();
     method public int getX();
     method public int getY();
+    method public int getYuv();
     method public int getZ();
     method public boolean hasFaces();
     method public boolean hasMipmaps();
@@ -20494,6 +20518,7 @@
     method public android.renderscript.Type.Builder setMipmaps(boolean);
     method public android.renderscript.Type.Builder setX(int);
     method public android.renderscript.Type.Builder setY(int);
+    method public android.renderscript.Type.Builder setYuvFormat(int);
     method public android.renderscript.Type.Builder setZ(int);
   }
 
@@ -28030,11 +28055,11 @@
   public class WebViewDatabase {
     method public void clearFormData();
     method public void clearHttpAuthUsernamePassword();
-    method public void clearUsernamePassword();
+    method public deprecated void clearUsernamePassword();
     method public static android.webkit.WebViewDatabase getInstance(android.content.Context);
     method public boolean hasFormData();
     method public boolean hasHttpAuthUsernamePassword();
-    method public boolean hasUsernamePassword();
+    method public deprecated boolean hasUsernamePassword();
   }
 
   public class WebViewFragment extends android.app.Fragment {
diff --git a/core/java/android/app/ActivityManagerNative.java b/core/java/android/app/ActivityManagerNative.java
index c99051b..98baa0e 100644
--- a/core/java/android/app/ActivityManagerNative.java
+++ b/core/java/android/app/ActivityManagerNative.java
@@ -1413,6 +1413,14 @@
             return true;
         }
         
+        case SET_USER_IS_MONKEY_TRANSACTION: {
+            data.enforceInterface(IActivityManager.descriptor);
+            final boolean monkey = (data.readInt() == 1);
+            setUserIsMonkey(monkey);
+            reply.writeNoException();
+            return true;
+        }
+
         case FINISH_HEAVY_WEIGHT_APP_TRANSACTION: {
             data.enforceInterface(IActivityManager.descriptor);
             finishHeavyWeightApp();
@@ -3633,7 +3641,18 @@
         reply.recycle();
         return res;
     }
-    
+
+    public void setUserIsMonkey(boolean monkey) throws RemoteException {
+        Parcel data = Parcel.obtain();
+        Parcel reply = Parcel.obtain();
+        data.writeInterfaceToken(IActivityManager.descriptor);
+        data.writeInt(monkey ? 1 : 0);
+        mRemote.transact(SET_USER_IS_MONKEY_TRANSACTION, data, reply, 0);
+        reply.readException();
+        data.recycle();
+        reply.recycle();
+    }
+
     public void finishHeavyWeightApp() throws RemoteException {
         Parcel data = Parcel.obtain();
         Parcel reply = Parcel.obtain();
diff --git a/core/java/android/app/IActivityManager.java b/core/java/android/app/IActivityManager.java
index fa8839a..33a2770 100644
--- a/core/java/android/app/IActivityManager.java
+++ b/core/java/android/app/IActivityManager.java
@@ -285,7 +285,9 @@
             int enterAnim, int exitAnim) throws RemoteException;
     
     public boolean isUserAMonkey() throws RemoteException;
-    
+
+    public void setUserIsMonkey(boolean monkey) throws RemoteException;
+
     public void finishHeavyWeightApp() throws RemoteException;
 
     public void setImmersive(IBinder token, boolean immersive) throws RemoteException;
@@ -635,4 +637,5 @@
     int REPORT_TOP_ACTIVITY_EXTRAS_TRANSACTION = IBinder.FIRST_CALL_TRANSACTION+162;
     int GET_LAUNCHED_FROM_PACKAGE_TRANSACTION = IBinder.FIRST_CALL_TRANSACTION+163;
     int KILL_UID_TRANSACTION = IBinder.FIRST_CALL_TRANSACTION+164;
+    int SET_USER_IS_MONKEY_TRANSACTION = IBinder.FIRST_CALL_TRANSACTION+165;
 }
diff --git a/core/java/android/app/Instrumentation.java b/core/java/android/app/Instrumentation.java
index e0dfb25..a307a73 100644
--- a/core/java/android/app/Instrumentation.java
+++ b/core/java/android/app/Instrumentation.java
@@ -189,6 +189,10 @@
         if (mPerfMetrics != null) {
             results.putAll(mPerfMetrics);
         }
+        if (mUiAutomation != null) {
+            mUiAutomation.disconnect();
+            mUiAutomation = null;
+        }
         mThread.finishInstrumentation(resultCode, results);
     }
     
@@ -1695,10 +1699,6 @@
                 startPerformanceSnapshot();
             }
             onStart();
-            if (mUiAutomation != null) {
-                mUiAutomation.disconnect();
-                mUiAutomation = null;
-            }
         }
     }
 
diff --git a/core/java/android/app/UiAutomation.java b/core/java/android/app/UiAutomation.java
index d9799b6..05b79c1 100644
--- a/core/java/android/app/UiAutomation.java
+++ b/core/java/android/app/UiAutomation.java
@@ -619,6 +619,25 @@
         return screenShot;
     }
 
+    /**
+     * Sets whether this UiAutomation to run in a "monkey" mode. Applications can query whether
+     * they are executed in a "monkey" mode, i.e. run by a test framework, and avoid doing
+     * potentially undesirable actions such as calling 911 or posting on public forums etc.
+     *
+     * @param enable whether to run in a "monkey" mode or not. Default is not.
+     * @see {@link ActivityManager#isUserAMonkey()}
+     */
+    public void setRunAsMonkey(boolean enable) {
+        synchronized (mLock) {
+            throwIfNotConnectedLocked();
+        }
+        try {
+            ActivityManagerNative.getDefault().setUserIsMonkey(enable);
+        } catch (RemoteException re) {
+            Log.e(LOG_TAG, "Error while setting run as monkey!", re);
+        }
+    }
+
     private static float getDegreesForRotation(int value) {
         switch (value) {
             case Surface.ROTATION_90: {
diff --git a/core/java/android/content/pm/PackageInfo.java b/core/java/android/content/pm/PackageInfo.java
index 33a6757..af1a6d5 100644
--- a/core/java/android/content/pm/PackageInfo.java
+++ b/core/java/android/content/pm/PackageInfo.java
@@ -224,6 +224,9 @@
     /** @hide */
     public String restrictedAccountType;
 
+    /** @hide */
+    public String requiredAccountType;
+
     public PackageInfo() {
     }
 
@@ -266,6 +269,7 @@
         dest.writeInt(installLocation);
         dest.writeInt(requiredForAllUsers ? 1 : 0);
         dest.writeString(restrictedAccountType);
+        dest.writeString(requiredAccountType);
     }
 
     public static final Parcelable.Creator<PackageInfo> CREATOR
@@ -306,5 +310,6 @@
         installLocation = source.readInt();
         requiredForAllUsers = source.readInt() != 0;
         restrictedAccountType = source.readString();
+        requiredAccountType = source.readString();
     }
 }
diff --git a/core/java/android/content/pm/PackageParser.java b/core/java/android/content/pm/PackageParser.java
index 5a50ec2..acb3725 100644
--- a/core/java/android/content/pm/PackageParser.java
+++ b/core/java/android/content/pm/PackageParser.java
@@ -289,6 +289,7 @@
         pi.installLocation = p.installLocation;
         pi.requiredForAllUsers = p.mRequiredForAllUsers;
         pi.restrictedAccountType = p.mRestrictedAccountType;
+        pi.requiredAccountType = p.mRequiredAccountType;
         pi.firstInstallTime = firstInstallTime;
         pi.lastUpdateTime = lastUpdateTime;
         if ((flags&PackageManager.GET_GIDS) != 0) {
@@ -1816,11 +1817,18 @@
                     false)) {
                 owner.mRequiredForAllUsers = true;
             }
-            String accountType = sa.getString(com.android.internal.R.styleable
-                    .AndroidManifestApplication_restrictedAccountType);
-            if (accountType != null && accountType.length() > 0) {
-                owner.mRestrictedAccountType = accountType;
-            }
+        }
+
+        String restrictedAccountType = sa.getString(com.android.internal.R.styleable
+                .AndroidManifestApplication_restrictedAccountType);
+        if (restrictedAccountType != null && restrictedAccountType.length() > 0) {
+            owner.mRestrictedAccountType = restrictedAccountType;
+        }
+
+        String requiredAccountType = sa.getString(com.android.internal.R.styleable
+                .AndroidManifestApplication_requiredAccountType);
+        if (requiredAccountType != null && requiredAccountType.length() > 0) {
+            owner.mRequiredAccountType = requiredAccountType;
         }
 
         if (sa.getBoolean(
@@ -3339,6 +3347,9 @@
         /* The restricted account authenticator type that is used by this application */
         public String mRestrictedAccountType;
 
+        /* The required account type without which this application will not function */
+        public String mRequiredAccountType;
+
         /**
          * Digest suitable for comparing whether this package's manifest is the
          * same as another.
diff --git a/core/java/android/content/res/Resources.java b/core/java/android/content/res/Resources.java
index 9338f3d..d64bff9 100644
--- a/core/java/android/content/res/Resources.java
+++ b/core/java/android/content/res/Resources.java
@@ -16,6 +16,7 @@
 
 package android.content.res;
 
+import android.os.Trace;
 import com.android.internal.util.XmlUtils;
 
 import org.xmlpull.v1.XmlPullParser;
@@ -2055,20 +2056,24 @@
                         + value.assetCookie + ": " + file);
 
                 if (file.endsWith(".xml")) {
+                    Trace.traceBegin(Trace.TRACE_TAG_RESOURCES, file);
                     try {
                         XmlResourceParser rp = loadXmlResourceParser(
                                 file, id, value.assetCookie, "drawable");
                         dr = Drawable.createFromXml(this, rp);
                         rp.close();
                     } catch (Exception e) {
+                        Trace.traceEnd(Trace.TRACE_TAG_RESOURCES);
                         NotFoundException rnf = new NotFoundException(
                             "File " + file + " from drawable resource ID #0x"
                             + Integer.toHexString(id));
                         rnf.initCause(e);
                         throw rnf;
                     }
+                    Trace.traceEnd(Trace.TRACE_TAG_RESOURCES);
 
                 } else {
+                    Trace.traceBegin(Trace.TRACE_TAG_RESOURCES, file);
                     try {
                         InputStream is = mAssets.openNonAsset(
                                 value.assetCookie, file, AssetManager.ACCESS_STREAMING);
@@ -2078,12 +2083,14 @@
                         is.close();
         //                System.out.println("Created stream: " + dr);
                     } catch (Exception e) {
+                        Trace.traceEnd(Trace.TRACE_TAG_RESOURCES);
                         NotFoundException rnf = new NotFoundException(
                             "File " + file + " from drawable resource ID #0x"
                             + Integer.toHexString(id));
                         rnf.initCause(e);
                         throw rnf;
                     }
+                    Trace.traceEnd(Trace.TRACE_TAG_RESOURCES);
                 }
             }
         }
@@ -2189,18 +2196,21 @@
         String file = value.string.toString();
 
         if (file.endsWith(".xml")) {
+            Trace.traceBegin(Trace.TRACE_TAG_RESOURCES, file);
             try {
                 XmlResourceParser rp = loadXmlResourceParser(
                         file, id, value.assetCookie, "colorstatelist"); 
                 csl = ColorStateList.createFromXml(this, rp);
                 rp.close();
             } catch (Exception e) {
+                Trace.traceEnd(Trace.TRACE_TAG_RESOURCES);
                 NotFoundException rnf = new NotFoundException(
                     "File " + file + " from color state list resource ID #0x"
                     + Integer.toHexString(id));
                 rnf.initCause(e);
                 throw rnf;
             }
+            Trace.traceEnd(Trace.TRACE_TAG_RESOURCES);
         } else {
             throw new NotFoundException(
                     "File " + file + " from drawable resource ID #0x"
diff --git a/core/java/android/hardware/SensorManager.java b/core/java/android/hardware/SensorManager.java
index 37cbe04..30118f9 100644
--- a/core/java/android/hardware/SensorManager.java
+++ b/core/java/android/hardware/SensorManager.java
@@ -1387,14 +1387,14 @@
      * @throws IllegalArgumentException when sensor is a trigger sensor.
      */
     public boolean cancelTriggerSensor(TriggerEventListener listener, Sensor sensor) {
-        return cancelTriggerSensorImpl(listener, sensor);
+        return cancelTriggerSensorImpl(listener, sensor, true);
     }
 
     /**
      * @hide
      */
     protected abstract boolean cancelTriggerSensorImpl(TriggerEventListener listener,
-            Sensor sensor);
+            Sensor sensor, boolean disable);
 
 
     private LegacySensorManager getLegacySensorManager() {
diff --git a/core/java/android/hardware/SystemSensorManager.java b/core/java/android/hardware/SystemSensorManager.java
index c6c999b..852cf4a 100644
--- a/core/java/android/hardware/SystemSensorManager.java
+++ b/core/java/android/hardware/SystemSensorManager.java
@@ -20,6 +20,7 @@
 import android.os.Handler;
 import android.os.Looper;
 import android.os.MessageQueue;
+import android.util.Log;
 import android.util.SparseArray;
 import android.util.SparseBooleanArray;
 import android.util.SparseIntArray;
@@ -135,7 +136,7 @@
                 if (sensor == null) {
                     result = queue.removeAllSensors();
                 } else {
-                    result = queue.removeSensor(sensor);
+                    result = queue.removeSensor(sensor, true);
                 }
                 if (result && !queue.hasSensors()) {
                     mSensorListeners.remove(listener);
@@ -170,7 +171,8 @@
 
     /** @hide */
     @Override
-    protected boolean cancelTriggerSensorImpl(TriggerEventListener listener, Sensor sensor) {
+    protected boolean cancelTriggerSensorImpl(TriggerEventListener listener, Sensor sensor,
+            boolean disable) {
         if (sensor != null && Sensor.getReportingMode(sensor) != Sensor.REPORTING_MODE_ONE_SHOT) {
             return false;
         }
@@ -181,7 +183,7 @@
                 if (sensor == null) {
                     result = queue.removeAllSensors();
                 } else {
-                    result = queue.removeSensor(sensor);
+                    result = queue.removeSensor(sensor, disable);
                 }
                 if (result && !queue.hasSensors()) {
                     mTriggerListeners.remove(listener);
@@ -225,14 +227,17 @@
 
         public boolean addSensor(Sensor sensor, int delay) {
             // Check if already present.
-            if (mActiveSensors.get(sensor.getHandle())) return false;
+            int handle = sensor.getHandle();
+            if (mActiveSensors.get(handle)) return false;
 
-            if (enableSensor(sensor, delay) == 0) {
-                mActiveSensors.put(sensor.getHandle(), true);
-                addSensorEvent(sensor);
-                return true;
+            // Get ready to receive events before calling enable.
+            mActiveSensors.put(handle, true);
+            addSensorEvent(sensor);
+            if (enableSensor(sensor, delay) != 0) {
+                removeSensor(sensor, false);
+                return false;
             }
-            return false;
+            return true;
         }
 
         public boolean removeAllSensors() {
@@ -252,10 +257,10 @@
             return true;
         }
 
-        public boolean removeSensor(Sensor sensor) {
+        public boolean removeSensor(Sensor sensor, boolean disable) {
             final int handle = sensor.getHandle();
             if (mActiveSensors.get(handle)) {
-                disableSensor(sensor);
+                if (disable) disableSensor(sensor);
                 mActiveSensors.put(sensor.getHandle(), false);
                 removeSensorEvent(sensor);
                 return true;
@@ -334,6 +339,10 @@
                 long timestamp) {
             final Sensor sensor = sHandleToSensor.get(handle);
             SensorEvent t = mSensorsEvents.get(handle);
+            if (t == null) {
+                Log.e(TAG, "Error: Sensor Event is null for Sensor: " + sensor);
+                return;
+            }
             // Copy from the values array.
             System.arraycopy(values, 0, t.values, 0, t.values.length);
             t.timestamp = timestamp;
@@ -390,14 +399,19 @@
                 long timestamp) {
             final Sensor sensor = sHandleToSensor.get(handle);
             TriggerEvent t = mTriggerEvents.get(handle);
+            if (t == null) {
+                Log.e(TAG, "Error: Trigger Event is null for Sensor: " + sensor);
+                return;
+            }
 
             // Copy from the values array.
             System.arraycopy(values, 0, t.values, 0, t.values.length);
             t.timestamp = timestamp;
             t.sensor = sensor;
 
-            // A trigger sensor should be auto disabled.
-            mManager.cancelTriggerSensorImpl(mListener, sensor);
+            // A trigger sensor is auto disabled. So just clean up and don't call native
+            // disable.
+            mManager.cancelTriggerSensorImpl(mListener, sensor, false);
 
             mListener.onTrigger(t);
         }
diff --git a/core/java/android/os/UserManager.java b/core/java/android/os/UserManager.java
index c61bf84..e580e2b 100644
--- a/core/java/android/os/UserManager.java
+++ b/core/java/android/os/UserManager.java
@@ -198,11 +198,11 @@
     }
 
     /**
-     * Used to check if the user making this call is a limited user. Limited users may have
+     * Used to check if the user making this call is linked to another user. Linked users may have
      * a reduced number of available apps, app restrictions and account restrictions.
-     * @return whether the user making this call is a limited user
+     * @return whether the user making this call is a linked user
      */
-    public boolean isUserLimited() {
+    public boolean isLinkedUser() {
         try {
             return mService.isRestricted();
         } catch (RemoteException re) {
diff --git a/core/java/android/view/ViewGroup.java b/core/java/android/view/ViewGroup.java
index 6da4b62..bf502dd 100644
--- a/core/java/android/view/ViewGroup.java
+++ b/core/java/android/view/ViewGroup.java
@@ -1464,10 +1464,13 @@
             final float y = event.getY();
             final int childrenCount = mChildrenCount;
             if (childrenCount != 0) {
+                final boolean customChildOrder = isChildrenDrawingOrderEnabled();
                 final View[] children = mChildren;
                 HoverTarget lastHoverTarget = null;
                 for (int i = childrenCount - 1; i >= 0; i--) {
-                    final View child = children[i];
+                    final int childIndex = customChildOrder
+                            ? getChildDrawingOrder(childrenCount, i) : i;
+                    final View child = children[childIndex];
                     if (!canViewReceivePointerEvents(child)
                             || !isTransformedTouchPointInView(x, y, child, null)) {
                         continue;
diff --git a/core/java/android/view/ViewRootImpl.java b/core/java/android/view/ViewRootImpl.java
index 094c901..f03c077 100644
--- a/core/java/android/view/ViewRootImpl.java
+++ b/core/java/android/view/ViewRootImpl.java
@@ -1727,7 +1727,7 @@
         if (didLayout) {
             performLayout(lp, desiredWindowWidth, desiredWindowHeight);
 
-            // By this point all views have been sized and positionned
+            // By this point all views have been sized and positioned
             // We can compute the transparent area
 
             if ((host.mPrivateFlags & View.PFLAG_REQUEST_TRANSPARENT_REGIONS) != 0) {
@@ -1745,6 +1745,7 @@
 
                 if (!mTransparentRegion.equals(mPreviousTransparentRegion)) {
                     mPreviousTransparentRegion.set(mTransparentRegion);
+                    mFullRedrawNeeded = true;
                     // reconfigure window manager
                     try {
                         mWindowSession.setTransparentRegion(mWindow, mTransparentRegion);
@@ -4922,7 +4923,7 @@
     public void handleDispatchDoneAnimating() {
         if (mWindowsAnimating) {
             mWindowsAnimating = false;
-            if (!mDirty.isEmpty() || mIsAnimating)  {
+            if (!mDirty.isEmpty() || mIsAnimating || mFullRedrawNeeded)  {
                 scheduleTraversals();
             }
         }
diff --git a/core/java/android/webkit/WebViewDatabase.java b/core/java/android/webkit/WebViewDatabase.java
index e08052a..99e0ffb 100644
--- a/core/java/android/webkit/WebViewDatabase.java
+++ b/core/java/android/webkit/WebViewDatabase.java
@@ -50,8 +50,10 @@
      *
      * @return true if there are any saved username/password pairs
      * @see WebView#savePassword
-     * @see #clearUsernamePassword
+     * @see #clearUsernamePassworda
+     * @deprecated Saving passwords in WebView will not be supported in future versions.
      */
+    @Deprecated
     public boolean hasUsernamePassword() {
         throw new MustOverrideException();
     }
@@ -62,7 +64,9 @@
      *
      * @see WebView#savePassword
      * @see #hasUsernamePassword
+     * @deprecated Saving passwords in WebView will not be supported in future versions.
      */
+    @Deprecated
     public void clearUsernamePassword() {
         throw new MustOverrideException();
     }
diff --git a/core/res/res/values-da/strings.xml b/core/res/res/values-da/strings.xml
index d2b11e4..0c7cf72 100644
--- a/core/res/res/values-da/strings.xml
+++ b/core/res/res/values-da/strings.xml
@@ -622,7 +622,7 @@
     <string name="permlab_accessNotifications" msgid="7673416487873432268">"adgang til underretninger"</string>
     <string name="permdesc_accessNotifications" msgid="458457742683431387">"Tillader, at appen kan hente, undersøge og rydde underretninger, herunder dem, der er sendt af andre apps."</string>
     <string name="permlab_bindNotificationListenerService" msgid="7057764742211656654">"forpligte sig til en underretningslyttertjeneste"</string>
-    <string name="permdesc_bindNotificationListenerService" msgid="985697918576902986">"Tillader, at brugeren kan forpligte sig til en grænseflade for en underretningslyttertjeneste på øverste niveau. Bør aldrig være nødvendigt til almindelige apps."</string>
+    <string name="permdesc_bindNotificationListenerService" msgid="985697918576902986">"Tillader brugeren at forpligte sig til en underretningslyttertjenestes grænseflade på øverste niveau. Bør aldrig være nødvendigt til almindelige apps."</string>
     <string name="policylab_limitPassword" msgid="4497420728857585791">"Indstil regler for adgangskode"</string>
     <string name="policydesc_limitPassword" msgid="3252114203919510394">"Kontroller længden samt tilladte tegn i adgangskoder til oplåsning af skærmen."</string>
     <string name="policylab_watchLogin" msgid="914130646942199503">"Overvåg forsøg på oplåsning af skærm"</string>
diff --git a/core/res/res/values-es/strings.xml b/core/res/res/values-es/strings.xml
index 09acbe1..485e1bf 100644
--- a/core/res/res/values-es/strings.xml
+++ b/core/res/res/values-es/strings.xml
@@ -559,8 +559,8 @@
     <string name="permdesc_changeNetworkState" msgid="6789123912476416214">"Permite que la aplicación modifique el estado de la conectividad de red."</string>
     <string name="permlab_changeTetherState" msgid="5952584964373017960">"cambiar conectividad de anclaje a red"</string>
     <string name="permdesc_changeTetherState" msgid="1524441344412319780">"Permite que la aplicación cambie el estado de la conectividad de red de anclaje."</string>
-    <string name="permlab_changeBackgroundDataSetting" msgid="1400666012671648741">"cambiar configuración de uso de datos de referencia"</string>
-    <string name="permdesc_changeBackgroundDataSetting" msgid="5347729578468744379">"Permite que la aplicación cambie los ajustes de uso de datos de referencia."</string>
+    <string name="permlab_changeBackgroundDataSetting" msgid="1400666012671648741">"cambiar configuración de uso de conexiones automáticas"</string>
+    <string name="permdesc_changeBackgroundDataSetting" msgid="5347729578468744379">"Permite que la aplicación cambie los ajustes de uso de conexiones automáticas."</string>
     <string name="permlab_accessWifiState" msgid="5202012949247040011">"ver conexiones Wi-Fi"</string>
     <string name="permdesc_accessWifiState" msgid="5002798077387803726">"Permite que la aplicación vea información sobre conexión a redes Wi-Fi (por ejemplo, si está habilitada la conexión Wi-Fi y el nombre de los dispositivos Wi-Fi conectados)."</string>
     <string name="permlab_changeWifiState" msgid="6550641188749128035">"conectarse a redes Wi-Fi y desconectarse"</string>
@@ -569,14 +569,14 @@
     <string name="permdesc_changeWifiMulticastState" product="tablet" msgid="7969774021256336548">"Permite que la aplicación reciba paquetes enviados a todos los dispositivos de una red Wi-Fi que utilicen direcciones de multidifusión, no solo al tablet. Utiliza más batería que el modo de no multidifusión."</string>
     <string name="permdesc_changeWifiMulticastState" product="default" msgid="6851949706025349926">"Permite que la aplicación reciba paquetes enviados a todos los dispositivos de una red Wi-Fi que utilicen direcciones de multidifusión, no solo al teléfono. Utiliza más batería que el modo de no multidifusión."</string>
     <string name="permlab_bluetoothAdmin" msgid="6006967373935926659">"acceder a los ajustes de Bluetooth"</string>
-    <string name="permdesc_bluetoothAdmin" product="tablet" msgid="6921177471748882137">"Permite que la aplicación configure el tablet Bluetooth local y que detecte dispositivos remotos y se sincronice con ellos."</string>
-    <string name="permdesc_bluetoothAdmin" product="default" msgid="8931682159331542137">"Permite que la aplicación configure el teléfono Bluetooth local y que detecte dispositivos remotos y se sincronice con ellos."</string>
+    <string name="permdesc_bluetoothAdmin" product="tablet" msgid="6921177471748882137">"Permite que la aplicación configure el tablet Bluetooth local y que detecte dispositivos remotos y se vincule con ellos."</string>
+    <string name="permdesc_bluetoothAdmin" product="default" msgid="8931682159331542137">"Permite que la aplicación configure el teléfono Bluetooth local y que detecte dispositivos remotos y se vincule con ellos."</string>
     <string name="permlab_accessWimaxState" msgid="4195907010610205703">"conectarse a WiMAX y desconectarse de esta red"</string>
     <string name="permdesc_accessWimaxState" msgid="6360102877261978887">"Permite que la aplicación determine si está habilitada la conexión WiMAX y obtenga información sobre las redes WiMAX que están conectadas."</string>
     <string name="permlab_changeWimaxState" msgid="2405042267131496579">"Cambiar estado de WiMAX"</string>
     <string name="permdesc_changeWimaxState" product="tablet" msgid="3156456504084201805">"Permite que la aplicación conecte el tablet a redes WiMAX y lo desconecte de ellas."</string>
     <string name="permdesc_changeWimaxState" product="default" msgid="697025043004923798">"Permite que la aplicación conecte el teléfono a redes WiMAX y lo desconecte de ellas."</string>
-    <string name="permlab_bluetooth" msgid="6127769336339276828">"sincronizarse con dispositivos Bluetooth"</string>
+    <string name="permlab_bluetooth" msgid="6127769336339276828">"vincular con dispositivos Bluetooth"</string>
     <string name="permdesc_bluetooth" product="tablet" msgid="3480722181852438628">"Permite que la aplicación acceda a la configuración de Bluetooth del tablet y que establezca y acepte conexiones con los dispositivos sincronizados."</string>
     <string name="permdesc_bluetooth" product="default" msgid="3207106324452312739">"Permite que la aplicación acceda a la configuración de Bluetooth del teléfono y que establezca y acepte conexiones con los dispositivos sincronizados."</string>
     <string name="permlab_nfc" msgid="4423351274757876953">"controlar Comunicación de campo cercano (NFC)"</string>
@@ -702,7 +702,7 @@
     <string name="phoneTypeIsdn" msgid="8022453193171370337">"RDSI"</string>
     <string name="phoneTypeMain" msgid="6766137010628326916">"Principal"</string>
     <string name="phoneTypeOtherFax" msgid="8587657145072446565">"Otro fax"</string>
-    <string name="phoneTypeRadio" msgid="4093738079908667513">"Radio"</string>
+    <string name="phoneTypeRadio" msgid="4093738079908667513">"Señal móvil"</string>
     <string name="phoneTypeTelex" msgid="3367879952476250512">"Télex"</string>
     <string name="phoneTypeTtyTdd" msgid="8606514378585000044">"TTY TDD"</string>
     <string name="phoneTypeWorkMobile" msgid="1311426989184065709">"Móvil del trabajo"</string>
@@ -1391,7 +1391,7 @@
     <string name="data_usage_mobile_limit_snoozed_title" msgid="279240572165412168">"Límite de datos móviles superado"</string>
     <string name="data_usage_wifi_limit_snoozed_title" msgid="8743856006384825974">"Límite de datos Wi-Fi superado"</string>
     <string name="data_usage_limit_snoozed_body" msgid="7035490278298441767">"Límite superado en <xliff:g id="SIZE">%s</xliff:g>"</string>
-    <string name="data_usage_restricted_title" msgid="5965157361036321914">"Datos de referencia restringidos"</string>
+    <string name="data_usage_restricted_title" msgid="5965157361036321914">"Conexiones automáticas restringidas"</string>
     <string name="data_usage_restricted_body" msgid="6741521330997452990">"Toca para eliminar la restricción."</string>
     <string name="ssl_certificate" msgid="6510040486049237639">"Certificado de seguridad"</string>
     <string name="ssl_certificate_is_valid" msgid="6825263250774569373">"Este certificado es válido."</string>
@@ -1420,7 +1420,7 @@
     <string name="default_audio_route_name" product="tablet" msgid="4617053898167127471">"Tablet"</string>
     <string name="default_audio_route_name" product="default" msgid="4239291273420140123">"Teléfono"</string>
     <string name="default_audio_route_name_headphones" msgid="8119971843803439110">"Auriculares"</string>
-    <string name="default_audio_route_name_dock_speakers" msgid="6240602982276591864">"Altavoces del conector"</string>
+    <string name="default_audio_route_name_dock_speakers" msgid="6240602982276591864">"Altavoces de la base"</string>
     <string name="default_media_route_name_hdmi" msgid="2450970399023478055">"HDMI"</string>
     <string name="default_audio_route_category_name" msgid="3722811174003886946">"Sistema"</string>
     <string name="bluetooth_a2dp_audio_route_name" msgid="8575624030406771015">"Audio Bluetooth"</string>
diff --git a/core/res/res/values-sw/strings.xml b/core/res/res/values-sw/strings.xml
index 0c11321..bdc0155 100644
--- a/core/res/res/values-sw/strings.xml
+++ b/core/res/res/values-sw/strings.xml
@@ -622,7 +622,7 @@
     <string name="permlab_accessNotifications" msgid="7673416487873432268">"fikia arifa"</string>
     <string name="permdesc_accessNotifications" msgid="458457742683431387">"Huruhusu programu kurejesha, kuchunguza, na kuondoa arifa, ikiwa ni pamoja na zile zilizochapishwa na programu nyingine."</string>
     <string name="permlab_bindNotificationListenerService" msgid="7057764742211656654">"unganisha kwenye huduma ya kisikilizi cha arifa"</string>
-    <string name="permdesc_bindNotificationListenerService" msgid="985697918576902986">"Inaruhusu kishikilizi kuunganishwa kwenye kiolesura cha kiwango cha juu cha huduma ya kisikilizi cha arifa. Haipaswi kuhitajika tena kwa programu za kawaida."</string>
+    <string name="permdesc_bindNotificationListenerService" msgid="985697918576902986">"Inaruhusu kishikilizi kuunganishwa kwenye kusano cha kiwango cha juu cha huduma ya kisikilizi cha arifa. Haipaswi kuhitajika tena kwa programu za kawaida."</string>
     <string name="policylab_limitPassword" msgid="4497420728857585791">"Weka kanuni za nenosiri"</string>
     <string name="policydesc_limitPassword" msgid="3252114203919510394">"Dhibiti urefu na vibambo vinavyoruhusiwa katika manenosiri ya kufungua skrini."</string>
     <string name="policylab_watchLogin" msgid="914130646942199503">"Chunguza majaribio ya kutofun gua skrini"</string>
@@ -1284,7 +1284,7 @@
     <string name="submit" msgid="1602335572089911941">"Wasilisha"</string>
     <string name="car_mode_disable_notification_title" msgid="3164768212003864316">"Mtindo wa gari umewezeshwa"</string>
     <string name="car_mode_disable_notification_message" msgid="8035230537563503262">"Gusa ili kutoka katika modi ya gari."</string>
-    <string name="tethered_notification_title" msgid="3146694234398202601">"Amilisha uzuiaji au mahali maalum"</string>
+    <string name="tethered_notification_title" msgid="3146694234398202601">"Kushiriki au kusambaza intaneti kumewashwa"</string>
     <string name="tethered_notification_message" msgid="6857031760103062982">"Gusa ili kusanidi."</string>
     <string name="back_button_label" msgid="2300470004503343439">"Nyuma"</string>
     <string name="next_button_label" msgid="1080555104677992408">"Ifuatayo"</string>
diff --git a/core/res/res/values/attrs_manifest.xml b/core/res/res/values/attrs_manifest.xml
index 7f5a3dc..f2c0aa0 100644
--- a/core/res/res/values/attrs_manifest.xml
+++ b/core/res/res/values/attrs_manifest.xml
@@ -909,8 +909,13 @@
         <!-- Declare that this application requires access to restricted accounts of a certain
              type. The default value is null and restricted accounts won\'t be visible to this
              application. The type should correspond to the account authenticator type, such as
-             "com.google" -->
+             "com.google". -->
         <attr name="restrictedAccountType" format="string"/>
+        <!-- Declare that this application requires an account of a certain
+             type. The default value is null and indicates that the application can work without
+             any accounts. The type should correspond to the account authenticator type, such as
+             "com.google". -->
+        <attr name="requiredAccountType" format="string"/>
     </declare-styleable>
     
     <!-- The <code>permission</code> tag declares a security permission that can be
diff --git a/core/res/res/values/public.xml b/core/res/res/values/public.xml
index 42d692f..074d91f 100644
--- a/core/res/res/values/public.xml
+++ b/core/res/res/values/public.xml
@@ -2042,6 +2042,7 @@
   <public type="attr" name="childIndicatorStart" />
   <public type="attr" name="childIndicatorEnd" />
   <public type="attr" name="restrictedAccountType" />
+  <public type="attr" name="requiredAccountType" />
 
   <public type="style" name="Theme.NoTitleBar.Overscan" />
   <public type="style" name="Theme.Light.NoTitleBar.Overscan" />
diff --git a/docs/html/tools/extras/oem-usb.jd b/docs/html/tools/extras/oem-usb.jd
index 774fe87..87734a1 100644
--- a/docs/html/tools/extras/oem-usb.jd
+++ b/docs/html/tools/extras/oem-usb.jd
@@ -306,6 +306,10 @@
 <tr><td>MTK</td> <td><a
 href="http://online.mediatek.com/Public%20Documents/MTK_Android_USB_Driver.zip">http://online.mediatek.com/Public%20Documents/MTK_Android_USB_Driver.zip</a></td>
 </tr>
+<tr><td>Oppo</td> <td><a
+href="http://www.oppo.com/index.php?q=software/view&sw_id=631"
+>http://www.oppo.com/index.php?q=software/view&sw_id=631</a></td>
+</tr>
 <tr><td>Pantech</td>	<td><a
 href="http://www.isky.co.kr/cs/software/software.sky?fromUrl=index">http://www.isky.co.kr/cs/software/software.sky?fromUrl=index</a></td>
 </tr><tr><td>Pegatron</td>	<td><a
@@ -327,6 +331,9 @@
 href="http://www.yulong.com/product/product/product/downloadList.html#downListUL">http://www.yulong.com/product/product/product/downloadList.html#downListUL</a></td>
 </tr>
 
+<tr><td>Xiaomi</td>  <td><a
+href="http://www.xiaomi.com/c/driver/index.html">http://www.xiaomi.com/c/driver/index.html</a></td>
+</tr>
 <tr>
 <td>ZTE</td>	<td><a
 href="http://support.zte.com.cn/support/news/NewsDetail.aspx?newsId=1000442">http://support.zte.com.cn/support/news/NewsDetail.aspx?newsId=1000442</a></td></tr>
diff --git a/graphics/java/android/graphics/drawable/Drawable.java b/graphics/java/android/graphics/drawable/Drawable.java
index c90f400..d5183d5 100644
--- a/graphics/java/android/graphics/drawable/Drawable.java
+++ b/graphics/java/android/graphics/drawable/Drawable.java
@@ -17,6 +17,7 @@
 package android.graphics.drawable;
 
 import android.graphics.Insets;
+import android.os.Trace;
 import org.xmlpull.v1.XmlPullParser;
 import org.xmlpull.v1.XmlPullParserException;
 
@@ -745,7 +746,12 @@
      * Create a drawable from an inputstream
      */
     public static Drawable createFromStream(InputStream is, String srcName) {
-        return createFromResourceStream(null, null, is, srcName, null);
+        Trace.traceBegin(Trace.TRACE_TAG_RESOURCES, srcName != null ? srcName : "Unknown drawable");
+        try {
+            return createFromResourceStream(null, null, is, srcName, null);
+        } finally {
+            Trace.traceEnd(Trace.TRACE_TAG_RESOURCES);
+        }
     }
 
     /**
@@ -754,7 +760,12 @@
      */
     public static Drawable createFromResourceStream(Resources res, TypedValue value,
             InputStream is, String srcName) {
-        return createFromResourceStream(res, value, is, srcName, null);
+        Trace.traceBegin(Trace.TRACE_TAG_RESOURCES, srcName != null ? srcName : "Unknown drawable");
+        try {
+            return createFromResourceStream(res, value, is, srcName, null);
+        } finally {
+            Trace.traceEnd(Trace.TRACE_TAG_RESOURCES);
+        }
     }
 
     /**
@@ -900,9 +911,14 @@
             return null;
         }
 
-        Bitmap bm = BitmapFactory.decodeFile(pathName);
-        if (bm != null) {
-            return drawableFromBitmap(null, bm, null, null, null, pathName);
+        Trace.traceBegin(Trace.TRACE_TAG_RESOURCES, pathName);
+        try {
+            Bitmap bm = BitmapFactory.decodeFile(pathName);
+            if (bm != null) {
+                return drawableFromBitmap(null, bm, null, null, null, pathName);
+            }
+        } finally {
+            Trace.traceEnd(Trace.TRACE_TAG_RESOURCES);
         }
 
         return null;
diff --git a/graphics/java/android/renderscript/Allocation.java b/graphics/java/android/renderscript/Allocation.java
index ea29b7d..5d1990a 100644
--- a/graphics/java/android/renderscript/Allocation.java
+++ b/graphics/java/android/renderscript/Allocation.java
@@ -277,21 +277,13 @@
                 throw new RSIllegalArgumentException("Invalid usage combination.");
             }
         }
-        if (t != null) {
-            // don't need to account for USAGE_SHARED Allocations
-            if ((usage & USAGE_SHARED) == 0) {
-                int numBytes = t.getCount() * t.getElement().getBytesSize();
-                rs.addAllocSizeForGC(numBytes);
-                mGCSize = numBytes;
-            }
-        }
+
         mType = t;
         mUsage = usage;
 
         if (t != null) {
             updateCacheInfo(t);
         }
-
     }
 
     private void validateIsInt32() {
@@ -355,12 +347,6 @@
             mType.updateFromNative();
             updateCacheInfo(mType);
         }
-        // don't need to account for USAGE_SHARED Allocations
-        if ((mUsage & USAGE_SHARED) == 0) {
-            int numBytes = mType.getCount() * mType.getElement().getBytesSize();
-            mRS.addAllocSizeForGC(numBytes);
-            mGCSize = numBytes;
-        }
     }
 
     /**
@@ -1264,7 +1250,6 @@
         if (type.getID(rs) == 0) {
             throw new RSInvalidStateException("Bad Type");
         }
-
         int id = rs.nAllocationCreateTyped(type.getID(rs), mips.mID, usage, 0);
         if (id == 0) {
             throw new RSRuntimeException("Allocation creation failed.");
@@ -1414,6 +1399,7 @@
             return alloc;
         }
 
+
         int id = rs.nAllocationCreateFromBitmap(t.getID(rs), mips.mID, b, usage);
         if (id == 0) {
             throw new RSRuntimeException("Load failed.");
diff --git a/graphics/java/android/renderscript/BaseObj.java b/graphics/java/android/renderscript/BaseObj.java
index c2ebc9f..f464f9b 100644
--- a/graphics/java/android/renderscript/BaseObj.java
+++ b/graphics/java/android/renderscript/BaseObj.java
@@ -71,9 +71,6 @@
     private int mID;
     private boolean mDestroyed;
     private String mName;
-
-    int mGCSize;
-
     RenderScript mRS;
 
     /**
@@ -138,9 +135,6 @@
             throw new RSInvalidStateException("Object already destroyed.");
         }
         mDestroyed = true;
-        if (mGCSize != 0) {
-            mRS.removeAllocSizeForGC(mGCSize);
-        }
         mRS.nObjDestroy(mID);
     }
 
diff --git a/graphics/java/android/renderscript/RenderScript.java b/graphics/java/android/renderscript/RenderScript.java
index 7163151..6f614c3 100644
--- a/graphics/java/android/renderscript/RenderScript.java
+++ b/graphics/java/android/renderscript/RenderScript.java
@@ -18,9 +18,7 @@
 
 import java.io.File;
 import java.lang.reflect.Field;
-import java.util.concurrent.locks.*;
 
-import android.app.ActivityManager;
 import android.content.Context;
 import android.content.pm.ApplicationInfo;
 import android.content.pm.PackageManager;
@@ -99,9 +97,29 @@
         mCacheDir = cacheDir;
     }
 
+    /**
+     * ContextType specifies the specific type of context to be created.
+     *
+     */
     public enum ContextType {
+        /**
+         * NORMAL context, this is the default and what shipping apps should
+         * use.
+         */
         NORMAL (0),
+
+        /**
+         * DEBUG context, perform extra runtime checks to validate the
+         * kernels and APIs are being used as intended.  Get and SetElementAt
+         * will be bounds checked in this mode.
+         */
         DEBUG (1),
+
+        /**
+         * PROFILE context, Intended to be used once the first time an
+         * application is run on a new device.  This mode allows the runtime to
+         * do additional testing and performance tuning.
+         */
         PROFILE (2);
 
         int mID;
@@ -784,8 +802,6 @@
     int     mContext;
     @SuppressWarnings({"FieldCanBeLocal"})
     MessageThread mMessageThread;
-    GCThread mGCThread;
-
 
     Element mElement_U8;
     Element mElement_I8;
@@ -915,7 +931,8 @@
     }
 
     /**
-     * @hide
+     * Place a message into the message queue to be sent back to the message
+     * handler once all previous commands have been executed.
      *
      * @param id
      * @param data
@@ -1074,60 +1091,6 @@
         }
     }
 
-    static class GCThread extends Thread {
-        RenderScript mRS;
-        boolean mRun = true;
-
-        long currentSize = 0;
-        long targetSize; // call System.gc after 512MB of allocs
-
-        final Lock lock = new ReentrantLock();
-        final Condition cond = lock.newCondition();
-
-        GCThread(RenderScript rs) {
-            super("RSGCThread");
-            mRS = rs;
-
-        }
-
-        public void run() {
-            ActivityManager am = (ActivityManager)mRS.getApplicationContext().getSystemService(Context.ACTIVITY_SERVICE);
-            ActivityManager.MemoryInfo meminfo = new ActivityManager.MemoryInfo();
-            am.getMemoryInfo(meminfo);
-            targetSize = (long)(meminfo.totalMem * .5f);
-
-            while(mRun) {
-                System.gc();
-                lock.lock();
-                try {
-                    cond.awaitUninterruptibly();
-                } finally {
-                    lock.unlock();
-                }
-            }
-
-            Log.d(LOG_TAG, "GCThread exiting.");
-        }
-
-        public synchronized void addAllocSize(long bytes) {
-            currentSize += bytes;
-            if (currentSize >= targetSize) {
-                lock.lock();
-                try {
-                    cond.signal();
-                } finally {
-                    lock.unlock();
-                }
-            }
-        }
-
-        public synchronized void removeAllocSize(long bytes) {
-            currentSize -= bytes;
-        }
-
-    }
-
-
     RenderScript(Context ctx) {
         if (ctx != null) {
             mApplicationContext = ctx.getApplicationContext();
@@ -1150,15 +1113,6 @@
         return create(ctx, sdkVersion, ContextType.NORMAL);
     }
 
-    void addAllocSizeForGC(int bytes) {
-        mGCThread.addAllocSize(bytes);
-    }
-
-    void removeAllocSizeForGC(int bytes) {
-        mGCThread.removeAllocSize(bytes);
-    }
-
-
     /**
      * Create a basic RenderScript context.
      *
@@ -1175,9 +1129,7 @@
             throw new RSDriverException("Failed to create RS context.");
         }
         rs.mMessageThread = new MessageThread(rs);
-        rs.mGCThread = new GCThread(rs);
         rs.mMessageThread.start();
-        rs.mGCThread.start();
         return rs;
     }
 
@@ -1194,9 +1146,9 @@
     /**
      * Create a basic RenderScript context.
      *
-     * @hide
      *
      * @param ctx The context.
+     * @param ct The type of context to be created.
      * @return RenderScript
      */
     public static RenderScript create(Context ctx, ContextType ct) {
@@ -1232,11 +1184,8 @@
         validate();
         nContextDeinitToClient(mContext);
         mMessageThread.mRun = false;
-        mGCThread.mRun = false;
-        mGCThread.addAllocSize(0);
         try {
             mMessageThread.join();
-            mGCThread.join();
         } catch(InterruptedException e) {
         }
 
diff --git a/graphics/java/android/renderscript/RenderScriptGL.java b/graphics/java/android/renderscript/RenderScriptGL.java
index fad8838..52034b1 100644
--- a/graphics/java/android/renderscript/RenderScriptGL.java
+++ b/graphics/java/android/renderscript/RenderScriptGL.java
@@ -198,9 +198,6 @@
         }
         mMessageThread = new MessageThread(this);
         mMessageThread.start();
-        mGCThread = new GCThread(this);
-        mGCThread.start();
-
     }
 
     /**
diff --git a/graphics/java/android/renderscript/ScriptC.java b/graphics/java/android/renderscript/ScriptC.java
index 2f69775..221f760 100644
--- a/graphics/java/android/renderscript/ScriptC.java
+++ b/graphics/java/android/renderscript/ScriptC.java
@@ -60,8 +60,6 @@
             throw new RSRuntimeException("Loading of ScriptC script failed.");
         }
         setID(id);
-        mGCSize = 2 * 1024 * 1024;
-        rs.addAllocSizeForGC(mGCSize);
     }
 
     /**
diff --git a/graphics/java/android/renderscript/ScriptIntrinsic3DLUT.java b/graphics/java/android/renderscript/ScriptIntrinsic3DLUT.java
index 3e58b87..86f37d8 100644
--- a/graphics/java/android/renderscript/ScriptIntrinsic3DLUT.java
+++ b/graphics/java/android/renderscript/ScriptIntrinsic3DLUT.java
@@ -20,7 +20,11 @@
 
 /**
  *
- * @hide
+ * Intrinsic for converting RGB to RGBA by using a 3D lookup table.  The
+ * incoming r,g,b values are use as normalized x,y,z coordinates into a 3D
+ * allocation.  The 8 nearest values are sampled and linearly interpolated.  The
+ * result is placed in the output.
+ *
  **/
 public final class ScriptIntrinsic3DLUT extends ScriptIntrinsic {
     private Allocation mLUT;
diff --git a/graphics/java/android/renderscript/Type.java b/graphics/java/android/renderscript/Type.java
index d7c8255..a5e24ce 100644
--- a/graphics/java/android/renderscript/Type.java
+++ b/graphics/java/android/renderscript/Type.java
@@ -112,7 +112,7 @@
     /**
      * Get the YUV format
      *
-     * @hide
+     *
      * @return int
      */
     public int getYuv() {
@@ -277,7 +277,9 @@
         }
 
         /**
-         * @hide
+         * Set the YUV layout for a Type.  This controls how the memory is
+         * interpreted.  Generally and application should not need to call this
+         * function and it would be set by the Camera.
          *
          * only NV21, YV12.  Enums from ImageFormat
          */
diff --git a/libs/hwui/Debug.h b/libs/hwui/Debug.h
index 46beb94..790c4f4 100644
--- a/libs/hwui/Debug.h
+++ b/libs/hwui/Debug.h
@@ -84,6 +84,9 @@
 // Turn on to insert an event marker for each display list op
 #define DEBUG_DISPLAY_LIST_OPS_AS_EVENTS 0
 
+// Turn on to highlight drawing batches and merged batches with different colors
+#define DEBUG_MERGE_BEHAVIOR 0
+
 #if DEBUG_INIT
     #define INIT_LOGD(...) ALOGD(__VA_ARGS__)
 #else
diff --git a/libs/hwui/DeferredDisplayList.cpp b/libs/hwui/DeferredDisplayList.cpp
index d5007e1..f0084f2 100644
--- a/libs/hwui/DeferredDisplayList.cpp
+++ b/libs/hwui/DeferredDisplayList.cpp
@@ -23,6 +23,7 @@
 
 #include "Caches.h"
 #include "Debug.h"
+#include "DeferredDisplayList.h"
 #include "DisplayListOp.h"
 #include "OpenGLRenderer.h"
 
@@ -38,15 +39,27 @@
 // Depth of the save stack at the beginning of batch playback at flush time
 #define FLUSH_SAVE_STACK_DEPTH 2
 
+#define DEBUG_COLOR_BARRIER          0x1f000000
+#define DEBUG_COLOR_MERGEDBATCH      0x5f7f7fff
+#define DEBUG_COLOR_MERGEDBATCH_SOLO 0x5f7fff7f
+
 /////////////////////////////////////////////////////////////////////////////////
 // Operation Batches
 /////////////////////////////////////////////////////////////////////////////////
 
-class DrawOpBatch {
+class Batch {
 public:
-    DrawOpBatch() { mOps.clear(); }
+    virtual status_t replay(OpenGLRenderer& renderer, Rect& dirty, int index) = 0;
+    virtual ~Batch() {}
+};
 
-    virtual ~DrawOpBatch() { mOps.clear(); }
+class DrawBatch : public Batch {
+public:
+    DrawBatch(int batchId, mergeid_t mergeId) : mBatchId(batchId), mMergeId(mergeId) {
+        mOps.clear();
+    }
+
+    virtual ~DrawBatch() { mOps.clear(); }
 
     void add(DrawOp* op) {
         // NOTE: ignore empty bounds special case, since we don't merge across those ops
@@ -54,7 +67,7 @@
         mOps.add(op);
     }
 
-    virtual bool intersects(Rect& rect) {
+    bool intersects(Rect& rect) {
         if (!rect.intersects(mBounds)) return false;
 
         for (unsigned int i = 0; i < mOps.size(); i++) {
@@ -71,8 +84,9 @@
         return false;
     }
 
-    virtual status_t replay(OpenGLRenderer& renderer, Rect& dirty) {
-        DEFER_LOGD("replaying draw batch %p", this);
+    virtual status_t replay(OpenGLRenderer& renderer, Rect& dirty, int index) {
+        DEFER_LOGD("%d  replaying DrawingBatch %p, with %d ops (batch id %x, merge id %p)",
+                index, this, mOps.size(), mOps[0]->getBatchId(), mOps[0]->getMergeId());
 
         status_t status = DrawGlInfo::kStatusDone;
         DisplayListLogBuffer& logBuffer = DisplayListLogBuffer::getInstance();
@@ -84,31 +98,127 @@
 #if DEBUG_DISPLAY_LIST_OPS_AS_EVENTS
             renderer.eventMark(op->name());
 #endif
-            status |= op->applyDraw(renderer, dirty, 0);
+            status |= op->applyDraw(renderer, dirty);
             logBuffer.writeCommand(0, op->name());
+
+#if DEBUG_MERGE_BEHAVIOR
+            Rect& bounds = mOps[i]->state.mBounds;
+            int batchColor = 0x1f000000;
+            if (getBatchId() & 0x1) batchColor |= 0x0000ff;
+            if (getBatchId() & 0x2) batchColor |= 0x00ff00;
+            if (getBatchId() & 0x4) batchColor |= 0xff0000;
+            renderer.drawScreenSpaceColorRect(bounds.left, bounds.top, bounds.right, bounds.bottom,
+                    batchColor);
+#endif
         }
         return status;
     }
 
+    inline int getBatchId() const { return mBatchId; }
+    inline mergeid_t getMergeId() const { return mMergeId; }
     inline int count() const { return mOps.size(); }
-private:
+
+protected:
     Vector<DrawOp*> mOps;
     Rect mBounds;
+private:
+    int mBatchId;
+    mergeid_t mMergeId;
 };
 
-class StateOpBatch : public DrawOpBatch {
+// compare alphas approximately, with a small margin
+#define NEQ_FALPHA(lhs, rhs) \
+        fabs((float)lhs - (float)rhs) > 0.001f
+
+class MergingDrawBatch : public DrawBatch {
+public:
+    MergingDrawBatch(int batchId, mergeid_t mergeId) : DrawBatch(batchId, mergeId) {}
+
+    /*
+     * Checks if a (mergeable) op can be merged into this batch
+     *
+     * If true, the op's multiDraw must be guaranteed to handle both ops simultaneously, so it is
+     * important to consider all paint attributes used in the draw calls in deciding both a) if an
+     * op tries to merge at all, and b) if the op
+     *
+     * False positives can lead to information from the paints of subsequent merged operations being
+     * dropped, so we make simplifying qualifications on the ops that can merge, per op type.
+     */
+    bool canMergeWith(DrawOp* op) {
+        if (!op->state.mMatrix.isPureTranslate()) return false;
+
+        bool isTextBatch = getBatchId() == DeferredDisplayList::kOpBatch_Text ||
+                getBatchId() == DeferredDisplayList::kOpBatch_ColorText;
+
+        // Overlapping other operations is only allowed for text without shadow. For other ops,
+        // multiDraw isn't guaranteed to overdraw correctly
+        if (!isTextBatch || op->state.mDrawModifiers.mHasShadow) {
+            if (intersects(op->state.mBounds)) return false;
+        }
+
+        const DeferredDisplayState& lhs = op->state;
+        const DeferredDisplayState& rhs = mOps[0]->state;
+
+        if (NEQ_FALPHA(lhs.mAlpha, rhs.mAlpha)) return false;
+
+        // if paints are equal, then modifiers + paint attribs don't need to be compared
+        if (op->mPaint == mOps[0]->mPaint) return true;
+
+        if (op->getPaintAlpha() != mOps[0]->getPaintAlpha()) return false;
+
+        /* Draw Modifiers compatibility check
+         *
+         * Shadows are ignored, as only text uses them, and in that case they are drawn
+         * per-DrawTextOp, before the unified text draw. Because of this, it's always safe to merge
+         * text UNLESS a later draw's shadow should overlays a previous draw's text. This is covered
+         * above with the intersection check.
+         *
+         * OverrideLayerAlpha is also ignored, as it's only used for drawing layers, which are never
+         * merged.
+         *
+         * These ignore cases prevent us from simply memcmp'ing the drawModifiers
+         */
+
+        const DrawModifiers& lhsMod = lhs.mDrawModifiers;
+        const DrawModifiers& rhsMod = rhs.mDrawModifiers;
+        if (lhsMod.mShader != rhsMod.mShader) return false;
+        if (lhsMod.mColorFilter != rhsMod.mColorFilter) return false;
+
+        // Draw filter testing expects bit fields to be clear if filter not set.
+        if (lhsMod.mHasDrawFilter != rhsMod.mHasDrawFilter) return false;
+        if (lhsMod.mPaintFilterClearBits != rhsMod.mPaintFilterClearBits) return false;
+        if (lhsMod.mPaintFilterSetBits != rhsMod.mPaintFilterSetBits) return false;
+
+        return true;
+    }
+
+    virtual status_t replay(OpenGLRenderer& renderer, Rect& dirty, int index) {
+        DEFER_LOGD("%d  replaying DrawingBatch %p, with %d ops (batch id %x, merge id %p)",
+                index, this, mOps.size(), getBatchId(), getMergeId());
+        if (mOps.size() == 1) {
+            return DrawBatch::replay(renderer, dirty, false);
+        }
+
+        DrawOp* op = mOps[0];
+        status_t status = op->multiDraw(renderer, dirty, mOps, mBounds);
+        DisplayListLogBuffer& buffer = DisplayListLogBuffer::getInstance();
+        buffer.writeCommand(0, "multiDraw");
+        buffer.writeCommand(1, op->name());
+
+#if DEBUG_MERGE_BEHAVIOR
+        renderer.drawScreenSpaceColorRect(mBounds.left, mBounds.top, mBounds.right, mBounds.bottom,
+                DEBUG_COLOR_MERGEDBATCH);
+#endif
+        return status;
+    }
+};
+
+class StateOpBatch : public Batch {
 public:
     // creates a single operation batch
     StateOpBatch(StateOp* op) : mOp(op) {}
 
-    bool intersects(Rect& rect) {
-        // if something checks for intersection, it's trying to go backwards across a state op,
-        // something not currently supported - state ops are always barriers
-        CRASH();
-        return false;
-    }
-
-    virtual status_t replay(OpenGLRenderer& renderer, Rect& dirty) {
+    virtual status_t replay(OpenGLRenderer& renderer, Rect& dirty, int index) {
         DEFER_LOGD("replaying state op batch %p", this);
         renderer.restoreDisplayState(mOp->state);
 
@@ -124,18 +234,11 @@
     const StateOp* mOp;
 };
 
-class RestoreToCountBatch : public DrawOpBatch {
+class RestoreToCountBatch : public Batch {
 public:
     RestoreToCountBatch(StateOp* op, int restoreCount) : mOp(op), mRestoreCount(restoreCount) {}
 
-    bool intersects(Rect& rect) {
-        // if something checks for intersection, it's trying to go backwards across a state op,
-        // something not currently supported - state ops are always barriers
-        CRASH();
-        return false;
-    }
-
-    virtual status_t replay(OpenGLRenderer& renderer, Rect& dirty) {
+    virtual status_t replay(OpenGLRenderer& renderer, Rect& dirty, int index) {
         DEFER_LOGD("batch %p restoring to count %d", this, mRestoreCount);
 
         renderer.restoreDisplayState(mOp->state);
@@ -155,14 +258,30 @@
     const int mRestoreCount;
 };
 
+#if DEBUG_MERGE_BEHAVIOR
+class BarrierDebugBatch : public Batch {
+    virtual status_t replay(OpenGLRenderer& renderer, Rect& dirty, int index) {
+        renderer.drawScreenSpaceColorRect(0, 0, 10000, 10000, DEBUG_COLOR_BARRIER);
+        return DrawGlInfo::kStatusDrew;
+    }
+};
+#endif
+
 /////////////////////////////////////////////////////////////////////////////////
 // DeferredDisplayList
 /////////////////////////////////////////////////////////////////////////////////
 
 void DeferredDisplayList::resetBatchingState() {
     for (int i = 0; i < kOpBatch_Count; i++) {
-        mBatchIndices[i] = -1;
+        mBatchLookup[i] = NULL;
+        mMergingBatches[i].clear();
     }
+#if DEBUG_MERGE_BEHAVIOR
+    if (mBatches.size() != 0) {
+        mBatches.add(new BarrierDebugBatch());
+    }
+#endif
+    mEarliestBatchIndex = mBatches.size();
 }
 
 void DeferredDisplayList::clear() {
@@ -174,6 +293,7 @@
     }
     mBatches.clear();
     mSaveStack.clear();
+    mEarliestBatchIndex = 0;
 }
 
 /////////////////////////////////////////////////////////////////////////////////
@@ -282,28 +402,35 @@
         return; // quick rejected
     }
 
-    op->onDrawOpDeferred(renderer);
+    int batchId = kOpBatch_None;
+    mergeid_t mergeId = (mergeid_t) -1;
+    bool mergeable = op->onDefer(renderer, &batchId, &mergeId);
+
+    // complex clip has a complex set of expectations on the renderer state - for now, avoid taking
+    // the merge path in those cases
+    mergeable &= !recordingComplexClip();
 
     if (CC_UNLIKELY(renderer.getCaches().drawReorderDisabled)) {
         // TODO: elegant way to reuse batches?
-        DrawOpBatch* b = new DrawOpBatch();
+        DrawBatch* b = new DrawBatch(batchId, mergeId);
         b->add(op);
         mBatches.add(b);
         return;
     }
 
-    // disallowReorder isn't set, so find the latest batch of the new op's type, and try to merge
-    // the new op into it
-    DrawOpBatch* targetBatch = NULL;
-    int batchId = op->getBatchId();
+    // find the latest batch of the new op's type, and try to merge the new op into it
+    DrawBatch* targetBatch = NULL;
 
+    // insertion point of a new batch, will hopefully be immediately after similar batch
+    // (eventually, should be similar shader)
+    int insertBatchIndex = mBatches.size();
     if (!mBatches.isEmpty()) {
         if (op->state.mBounds.isEmpty()) {
             // don't know the bounds for op, so add to last batch and start from scratch on next op
-            mBatches.top()->add(op);
-            for (int i = 0; i < kOpBatch_Count; i++) {
-                mBatchIndices[i] = -1;
-            }
+            DrawBatch* b = new DrawBatch(batchId, mergeId);
+            b->add(op);
+            mBatches.add(b);
+            resetBatchingState();
 #if DEBUG_DEFER
             DEFER_LOGD("Warning: Encountered op with empty bounds, resetting batches");
             op->output(2);
@@ -311,13 +438,36 @@
             return;
         }
 
-        if (batchId >= 0 && mBatchIndices[batchId] != -1) {
-            int targetIndex = mBatchIndices[batchId];
-            targetBatch = mBatches[targetIndex];
+        if (mergeable) {
+            // Try to merge with any existing batch with same mergeId.
+            if (mMergingBatches[batchId].get(mergeId, targetBatch)) {
+                if (!((MergingDrawBatch*) targetBatch)->canMergeWith(op)) {
+                    targetBatch = NULL;
+                }
+            }
+        } else {
+            // join with similar, non-merging batch
+            targetBatch = (DrawBatch*)mBatchLookup[batchId];
+        }
+
+        if (targetBatch || mergeable) {
             // iterate back toward target to see if anything drawn since should overlap the new op
-            for (int i = mBatches.size() - 1; i > targetIndex; i--) {
-                DrawOpBatch* overBatch = mBatches[i];
+            // if no target, merging ops still interate to find similar batch to insert after
+            for (int i = mBatches.size() - 1; i >= mEarliestBatchIndex; i--) {
+                DrawBatch* overBatch = (DrawBatch*)mBatches[i];
+
+                if (overBatch == targetBatch) break;
+
+                // TODO: also consider shader shared between batch types
+                if (batchId == overBatch->getBatchId()) {
+                    insertBatchIndex = i + 1;
+                    if (!targetBatch) break; // found insert position, quit
+                }
+
                 if (overBatch->intersects(op->state.mBounds)) {
+                    // NOTE: it may be possible to optimize for special cases where two operations
+                    // of the same batch/paint could swap order, such as with a non-mergeable
+                    // (clipped) and a mergeable text operation
                     targetBatch = NULL;
 #if DEBUG_DEFER
                     DEFER_LOGD("op couldn't join batch %d, was intersected by batch %d",
@@ -329,13 +479,21 @@
             }
         }
     }
+
     if (!targetBatch) {
-        targetBatch = new DrawOpBatch();
-        mBatches.add(targetBatch);
-        if (batchId >= 0) {
-            mBatchIndices[batchId] = mBatches.size() - 1;
+        if (mergeable) {
+            targetBatch = new MergingDrawBatch(batchId, mergeId);
+            mMergingBatches[batchId].put(mergeId, targetBatch);
+        } else {
+            targetBatch = new DrawBatch(batchId, mergeId);
+            mBatchLookup[batchId] = targetBatch;
+            DEFER_LOGD("creating Batch %p, bid %x, at %d",
+                    targetBatch, batchId, insertBatchIndex);
         }
+
+        mBatches.insertAt(targetBatch, insertBatchIndex);
     }
+
     targetBatch->add(op);
 }
 
@@ -363,16 +521,14 @@
 // Replay / flush
 /////////////////////////////////////////////////////////////////////////////////
 
-static status_t replayBatchList(Vector<DrawOpBatch*>& batchList,
+static status_t replayBatchList(const Vector<Batch*>& batchList,
         OpenGLRenderer& renderer, Rect& dirty) {
     status_t status = DrawGlInfo::kStatusDone;
 
-    int opCount = 0;
     for (unsigned int i = 0; i < batchList.size(); i++) {
-        status |= batchList[i]->replay(renderer, dirty);
-        opCount += batchList[i]->count();
+        status |= batchList[i]->replay(renderer, dirty, i);
     }
-    DEFER_LOGD("--flushed, drew %d batches (total %d ops)", batchList.size(), opCount);
+    DEFER_LOGD("--flushed, drew %d batches", batchList.size());
     return status;
 }
 
@@ -400,7 +556,6 @@
     renderer.setDrawModifiers(restoreDrawModifiers);
 
     DEFER_LOGD("--flush complete, returning %x", status);
-
     clear();
     return status;
 }
diff --git a/libs/hwui/DeferredDisplayList.h b/libs/hwui/DeferredDisplayList.h
index 653f315..9782c1c 100644
--- a/libs/hwui/DeferredDisplayList.h
+++ b/libs/hwui/DeferredDisplayList.h
@@ -22,6 +22,9 @@
 
 #include "Matrix.h"
 #include "Rect.h"
+#include "utils/TinyHashMap.h"
+
+class SkBitmap;
 
 namespace android {
 namespace uirenderer {
@@ -31,16 +34,21 @@
 class SaveOp;
 class SaveLayerOp;
 class StateOp;
-class DrawOpBatch;
 class OpenGLRenderer;
 
+class Batch;
+class DrawBatch;
+class MergingDrawBatch;
+
+typedef void* mergeid_t;
+
 class DeferredDisplayList {
 public:
     DeferredDisplayList() { clear(); }
     ~DeferredDisplayList() { clear(); }
 
     enum OpBatchId {
-        kOpBatch_None = -1, // Don't batch
+        kOpBatch_None = 0, // Don't batch
         kOpBatch_Bitmap,
         kOpBatch_Patch,
         kOpBatch_AlphaVertices,
@@ -96,8 +104,20 @@
     Vector<int> mSaveStack;
     int mComplexClipStackStart;
 
-    Vector<DrawOpBatch*> mBatches;
-    int mBatchIndices[kOpBatch_Count];
+    Vector<Batch*> mBatches;
+
+    // Maps batch ids to the most recent *non-merging* batch of that id
+    Batch* mBatchLookup[kOpBatch_Count];
+
+    // Points to the index after the most recent barrier
+    int mEarliestBatchIndex;
+
+    /**
+     * Maps the mergeid_t returned by an op's getMergeId() to the most recently seen
+     * MergingDrawBatch of that id. These ids are unique per draw type and guaranteed to not
+     * collide, which avoids the need to resolve mergeid collisions.
+     */
+    TinyHashMap<mergeid_t, DrawBatch*> mMergingBatches[kOpBatch_Count];
 };
 
 }; // namespace uirenderer
diff --git a/libs/hwui/DisplayList.cpp b/libs/hwui/DisplayList.cpp
index 36c95f9..26abec2 100644
--- a/libs/hwui/DisplayList.cpp
+++ b/libs/hwui/DisplayList.cpp
@@ -485,7 +485,7 @@
 
 #if DEBUG_DISPLAY_LIST
     Rect* clipRect = renderer.getClipRect();
-    DISPLAY_LIST_LOGD("%*sStart display list (%p, %s), clipRect: %.0f, %.f, %.0f, %.0f",
+    DISPLAY_LIST_LOGD("%*sStart display list (%p, %s), clipRect: %.0f, %.0f, %.0f, %.0f",
             level * 2, "", this, mName.string(), clipRect->left, clipRect->top,
             clipRect->right, clipRect->bottom);
 #endif
diff --git a/libs/hwui/DisplayListOp.h b/libs/hwui/DisplayListOp.h
index a5dee9f..ad7edb1 100644
--- a/libs/hwui/DisplayListOp.h
+++ b/libs/hwui/DisplayListOp.h
@@ -121,6 +121,7 @@
 };
 
 class DrawOp : public DisplayListOp {
+friend class MergingDrawBatch;
 public:
     DrawOp(SkPaint* paint)
             : mPaint(paint), mQuickRejected(false) {}
@@ -145,12 +146,41 @@
             return;
         }
 
-        replayStruct.mDrawGlStatus |= applyDraw(replayStruct.mRenderer, replayStruct.mDirty, level);
+        replayStruct.mDrawGlStatus |= applyDraw(replayStruct.mRenderer, replayStruct.mDirty);
     }
 
-    virtual status_t applyDraw(OpenGLRenderer& renderer, Rect& dirty, int level) = 0;
+    virtual status_t applyDraw(OpenGLRenderer& renderer, Rect& dirty) = 0;
 
-    virtual void onDrawOpDeferred(OpenGLRenderer& renderer) {
+    /**
+     * Draw multiple instances of an operation, must be overidden for operations that merge
+     *
+     * Currently guarantees certain similarities between ops (see MergingDrawBatch::canMergeWith),
+     * and pure translation transformations. Other guarantees of similarity should be enforced by
+     * reducing which operations are tagged as mergeable.
+     */
+    virtual status_t multiDraw(OpenGLRenderer& renderer, Rect& dirty,
+            const Vector<DrawOp*>& ops, const Rect& bounds) {
+        status_t status = DrawGlInfo::kStatusDone;
+        for (unsigned int i = 0; i < ops.size(); i++) {
+            renderer.restoreDisplayState(ops[i]->state);
+            status |= ops[i]->applyDraw(renderer, dirty);
+        }
+        return status;
+    }
+
+    /*
+     * When this method is invoked the state field is initialized to have the
+     * final rendering state. We can thus use it to process data as it will be
+     * used at draw time.
+     *
+     * Additionally, this method allows subclasses to provide defer-time preferences for batching
+     * and merging.
+     *
+     * Return true if the op can merge with others of its kind (such subclasses should implement
+     * multiDraw)
+     */
+    virtual bool onDefer(OpenGLRenderer& renderer, int* batchId, mergeid_t* mergeId) {
+        return false;
     }
 
     // returns true if bounds exist
@@ -160,12 +190,11 @@
     void setQuickRejected(bool quickRejected) { mQuickRejected = quickRejected; }
     bool getQuickRejected() { return mQuickRejected; }
 
-    /** Batching disabled by default, turned on for individual ops */
-    virtual DeferredDisplayList::OpBatchId getBatchId() {
-        return DeferredDisplayList::kOpBatch_None;
+    inline int getPaintAlpha() {
+        return OpenGLRenderer::getAlphaDirect(mPaint);
     }
 
-    float strokeWidthOutset() {
+    inline float strokeWidthOutset() {
         float width = mPaint->getStrokeWidth();
         if (width == 0) return 0.5f; // account for hairline
         return width * 0.5f;
@@ -207,6 +236,14 @@
         return true;
     }
 
+    bool mergeAllowed() {
+        // checks that we're unclipped, and srcover
+        const Rect& opBounds = state.mBounds;
+        return fabs(opBounds.getWidth() - mLocalBounds.getWidth()) < 0.1 &&
+                fabs(opBounds.getHeight() - mLocalBounds.getHeight()) < 0.1 &&
+                (OpenGLRenderer::getXfermodeDirect(mPaint) == SkXfermode::kSrcOver_Mode);
+    }
+
 protected:
     Rect mLocalBounds; // displayed area in LOCAL coord. doesn't incorporate stroke, so check paint
 };
@@ -686,20 +723,58 @@
                     paint),
             mBitmap(bitmap) {}
 
-    virtual status_t applyDraw(OpenGLRenderer& renderer, Rect& dirty, int level) {
+    virtual status_t applyDraw(OpenGLRenderer& renderer, Rect& dirty) {
         return renderer.drawBitmap(mBitmap, mLocalBounds.left, mLocalBounds.top,
                 getPaint(renderer));
     }
 
+#define SET_TEXTURE(ptr, posRect, offsetRect, texCoordsRect, xDim, yDim) \
+    TextureVertex::set(ptr++, posRect.xDim - offsetRect.left, posRect.yDim - offsetRect.top, \
+            texCoordsRect.xDim, texCoordsRect.yDim)
+
+    virtual status_t multiDraw(OpenGLRenderer& renderer, Rect& dirty,
+            const Vector<DrawOp*>& ops, const Rect& bounds) {
+        renderer.restoreDisplayState(state, true); // restore all but the clip
+        renderer.setFullScreenClip(); // ensure merged ops aren't clipped
+        TextureVertex vertices[6 * ops.size()];
+        TextureVertex* vertex = &vertices[0];
+
+        // TODO: manually handle rect clip for bitmaps by adjusting texCoords per op, and allowing
+        // them to be merged in getBatchId()
+        const Rect texCoords(0, 0, 1, 1);
+
+        const float width = mBitmap->width();
+        const float height = mBitmap->height();
+        for (unsigned int i = 0; i < ops.size(); i++) {
+            const Rect& opBounds = ops[i]->state.mBounds;
+            SET_TEXTURE(vertex, opBounds, bounds, texCoords, left, top);
+            SET_TEXTURE(vertex, opBounds, bounds, texCoords, right, top);
+            SET_TEXTURE(vertex, opBounds, bounds, texCoords, left, bottom);
+
+            SET_TEXTURE(vertex, opBounds, bounds, texCoords, left, bottom);
+            SET_TEXTURE(vertex, opBounds, bounds, texCoords, right, top);
+            SET_TEXTURE(vertex, opBounds, bounds, texCoords, right, bottom);
+        }
+
+        return renderer.drawBitmaps(mBitmap, ops.size(), &vertices[0], bounds, mPaint);
+    }
+
     virtual void output(int level, uint32_t logFlags) {
         OP_LOG("Draw bitmap %p at %f %f", mBitmap, mLocalBounds.left, mLocalBounds.top);
     }
 
     virtual const char* name() { return "DrawBitmap"; }
-    virtual DeferredDisplayList::OpBatchId getBatchId() {
-        return DeferredDisplayList::kOpBatch_Bitmap;
+
+    virtual bool onDefer(OpenGLRenderer& renderer, int* batchId, mergeid_t* mergeId) {
+        *batchId = DeferredDisplayList::kOpBatch_Bitmap;
+        *mergeId = (mergeid_t)mBitmap;
+
+        // don't merge A8 bitmaps - the paint's color isn't compared by mergeId, or in
+        // MergingDrawBatch::canMergeWith
+        return mergeAllowed() && (mBitmap->getConfig() != SkBitmap::kA8_Config);
     }
 
+    const SkBitmap* bitmap() { return mBitmap; }
 protected:
     SkBitmap* mBitmap;
 };
@@ -713,7 +788,7 @@
         transform.mapRect(mLocalBounds);
     }
 
-    virtual status_t applyDraw(OpenGLRenderer& renderer, Rect& dirty, int level) {
+    virtual status_t applyDraw(OpenGLRenderer& renderer, Rect& dirty) {
         return renderer.drawBitmap(mBitmap, mMatrix, getPaint(renderer));
     }
 
@@ -721,9 +796,11 @@
         OP_LOG("Draw bitmap %p matrix " MATRIX_STRING, mBitmap, MATRIX_ARGS(mMatrix));
     }
 
-    virtual const char* name() { return "DrawBitmap"; }
-    virtual DeferredDisplayList::OpBatchId getBatchId() {
-        return DeferredDisplayList::kOpBatch_Bitmap;
+    virtual const char* name() { return "DrawBitmapMatrix"; }
+
+    virtual bool onDefer(OpenGLRenderer& renderer, int* batchId, mergeid_t* mergeId) {
+        *batchId = DeferredDisplayList::kOpBatch_Bitmap;
+        return false;
     }
 
 private:
@@ -738,7 +815,7 @@
             : DrawBoundedOp(dstLeft, dstTop, dstRight, dstBottom, paint),
             mBitmap(bitmap), mSrc(srcLeft, srcTop, srcRight, srcBottom) {}
 
-    virtual status_t applyDraw(OpenGLRenderer& renderer, Rect& dirty, int level) {
+    virtual status_t applyDraw(OpenGLRenderer& renderer, Rect& dirty) {
         return renderer.drawBitmap(mBitmap, mSrc.left, mSrc.top, mSrc.right, mSrc.bottom,
                 mLocalBounds.left, mLocalBounds.top, mLocalBounds.right, mLocalBounds.bottom,
                 getPaint(renderer));
@@ -750,8 +827,10 @@
     }
 
     virtual const char* name() { return "DrawBitmapRect"; }
-    virtual DeferredDisplayList::OpBatchId getBatchId() {
-        return DeferredDisplayList::kOpBatch_Bitmap;
+
+    virtual bool onDefer(OpenGLRenderer& renderer, int* batchId, mergeid_t* mergeId) {
+        *batchId = DeferredDisplayList::kOpBatch_Bitmap;
+        return false;
     }
 
 private:
@@ -764,7 +843,7 @@
     DrawBitmapDataOp(SkBitmap* bitmap, float left, float top, SkPaint* paint)
             : DrawBitmapOp(bitmap, left, top, paint) {}
 
-    virtual status_t applyDraw(OpenGLRenderer& renderer, Rect& dirty, int level) {
+    virtual status_t applyDraw(OpenGLRenderer& renderer, Rect& dirty) {
         return renderer.drawBitmapData(mBitmap, mLocalBounds.left,
                 mLocalBounds.top, getPaint(renderer));
     }
@@ -774,8 +853,10 @@
     }
 
     virtual const char* name() { return "DrawBitmapData"; }
-    virtual DeferredDisplayList::OpBatchId getBatchId() {
-        return DeferredDisplayList::kOpBatch_Bitmap;
+
+    virtual bool onDefer(OpenGLRenderer& renderer, int* batchId, mergeid_t* mergeId) {
+        *batchId = DeferredDisplayList::kOpBatch_Bitmap;
+        return false;
     }
 };
 
@@ -787,7 +868,7 @@
             mBitmap(bitmap), mMeshWidth(meshWidth), mMeshHeight(meshHeight),
             mVertices(vertices), mColors(colors) {}
 
-    virtual status_t applyDraw(OpenGLRenderer& renderer, Rect& dirty, int level) {
+    virtual status_t applyDraw(OpenGLRenderer& renderer, Rect& dirty) {
         return renderer.drawBitmapMesh(mBitmap, mMeshWidth, mMeshHeight,
                 mVertices, mColors, getPaint(renderer));
     }
@@ -797,8 +878,10 @@
     }
 
     virtual const char* name() { return "DrawBitmapMesh"; }
-    virtual DeferredDisplayList::OpBatchId getBatchId() {
-        return DeferredDisplayList::kOpBatch_Bitmap;
+
+    virtual bool onDefer(OpenGLRenderer& renderer, int* batchId, mergeid_t* mergeId) {
+        *batchId = DeferredDisplayList::kOpBatch_Bitmap;
+        return false;
     }
 
 private:
@@ -820,7 +903,7 @@
             mColors(colors), mxDivsCount(width), myDivsCount(height),
             mNumColors(numColors), mAlpha(alpha), mMode(mode) {};
 
-    virtual status_t applyDraw(OpenGLRenderer& renderer, Rect& dirty, int level) {
+    virtual status_t applyDraw(OpenGLRenderer& renderer, Rect& dirty) {
         // NOTE: not calling the virtual method, which takes a paint
         return renderer.drawPatch(mBitmap, mxDivs, myDivs, mColors,
                 mxDivsCount, myDivsCount, mNumColors,
@@ -833,8 +916,11 @@
     }
 
     virtual const char* name() { return "DrawPatch"; }
-    virtual DeferredDisplayList::OpBatchId getBatchId() {
-        return DeferredDisplayList::kOpBatch_Patch;
+
+    virtual bool onDefer(OpenGLRenderer& renderer, int* batchId, mergeid_t* mergeId) {
+        *batchId = DeferredDisplayList::kOpBatch_Patch;
+        *mergeId = (mergeid_t)mBitmap;
+        return true;
     }
 
 private:
@@ -854,7 +940,7 @@
     DrawColorOp(int color, SkXfermode::Mode mode)
             : DrawOp(0), mColor(color), mMode(mode) {};
 
-    virtual status_t applyDraw(OpenGLRenderer& renderer, Rect& dirty, int level) {
+    virtual status_t applyDraw(OpenGLRenderer& renderer, Rect& dirty) {
         return renderer.drawColor(mColor, mMode);
     }
 
@@ -882,13 +968,15 @@
         return true;
     }
 
-    virtual DeferredDisplayList::OpBatchId getBatchId() {
+    virtual bool onDefer(OpenGLRenderer& renderer, int* batchId, mergeid_t* mergeId) {
         if (mPaint->getPathEffect()) {
-            return DeferredDisplayList::kOpBatch_AlphaMaskTexture;
+            *batchId = DeferredDisplayList::kOpBatch_AlphaMaskTexture;
+        } else {
+            *batchId = mPaint->isAntiAlias() ?
+                    DeferredDisplayList::kOpBatch_AlphaVertices :
+                    DeferredDisplayList::kOpBatch_Vertices;
         }
-        return mPaint->isAntiAlias() ?
-                DeferredDisplayList::kOpBatch_AlphaVertices :
-                DeferredDisplayList::kOpBatch_Vertices;
+        return false;
     }
 };
 
@@ -897,7 +985,7 @@
     DrawRectOp(float left, float top, float right, float bottom, SkPaint* paint)
             : DrawStrokableOp(left, top, right, bottom, paint) {}
 
-    virtual status_t applyDraw(OpenGLRenderer& renderer, Rect& dirty, int level) {
+    virtual status_t applyDraw(OpenGLRenderer& renderer, Rect& dirty) {
         return renderer.drawRect(mLocalBounds.left, mLocalBounds.top,
                 mLocalBounds.right, mLocalBounds.bottom, getPaint(renderer));
     }
@@ -915,7 +1003,7 @@
             : DrawBoundedOp(rects, count, paint),
             mRects(rects), mCount(count) {}
 
-    virtual status_t applyDraw(OpenGLRenderer& renderer, Rect& dirty, int level) {
+    virtual status_t applyDraw(OpenGLRenderer& renderer, Rect& dirty) {
         return renderer.drawRects(mRects, mCount, getPaint(renderer));
     }
 
@@ -925,8 +1013,9 @@
 
     virtual const char* name() { return "DrawRects"; }
 
-    virtual DeferredDisplayList::OpBatchId getBatchId() {
-        return DeferredDisplayList::kOpBatch_Vertices;
+    virtual bool onDefer(OpenGLRenderer& renderer, int* batchId, mergeid_t* mergeId) {
+        *batchId = DeferredDisplayList::kOpBatch_Vertices;
+        return false;
     }
 
 private:
@@ -940,7 +1029,7 @@
             float rx, float ry, SkPaint* paint)
             : DrawStrokableOp(left, top, right, bottom, paint), mRx(rx), mRy(ry) {}
 
-    virtual status_t applyDraw(OpenGLRenderer& renderer, Rect& dirty, int level) {
+    virtual status_t applyDraw(OpenGLRenderer& renderer, Rect& dirty) {
         return renderer.drawRoundRect(mLocalBounds.left, mLocalBounds.top,
                 mLocalBounds.right, mLocalBounds.bottom, mRx, mRy, getPaint(renderer));
     }
@@ -962,7 +1051,7 @@
             : DrawStrokableOp(x - radius, y - radius, x + radius, y + radius, paint),
             mX(x), mY(y), mRadius(radius) {}
 
-    virtual status_t applyDraw(OpenGLRenderer& renderer, Rect& dirty, int level) {
+    virtual status_t applyDraw(OpenGLRenderer& renderer, Rect& dirty) {
         return renderer.drawCircle(mX, mY, mRadius, getPaint(renderer));
     }
 
@@ -983,7 +1072,7 @@
     DrawOvalOp(float left, float top, float right, float bottom, SkPaint* paint)
             : DrawStrokableOp(left, top, right, bottom, paint) {}
 
-    virtual status_t applyDraw(OpenGLRenderer& renderer, Rect& dirty, int level) {
+    virtual status_t applyDraw(OpenGLRenderer& renderer, Rect& dirty) {
         return renderer.drawOval(mLocalBounds.left, mLocalBounds.top,
                 mLocalBounds.right, mLocalBounds.bottom, getPaint(renderer));
     }
@@ -1002,7 +1091,7 @@
             : DrawStrokableOp(left, top, right, bottom, paint),
             mStartAngle(startAngle), mSweepAngle(sweepAngle), mUseCenter(useCenter) {}
 
-    virtual status_t applyDraw(OpenGLRenderer& renderer, Rect& dirty, int level) {
+    virtual status_t applyDraw(OpenGLRenderer& renderer, Rect& dirty) {
         return renderer.drawArc(mLocalBounds.left, mLocalBounds.top,
                 mLocalBounds.right, mLocalBounds.bottom,
                 mStartAngle, mSweepAngle, mUseCenter, getPaint(renderer));
@@ -1033,13 +1122,16 @@
         mLocalBounds.set(left, top, left + width, top + height);
     }
 
-    virtual status_t applyDraw(OpenGLRenderer& renderer, Rect& dirty, int level) {
+    virtual status_t applyDraw(OpenGLRenderer& renderer, Rect& dirty) {
         return renderer.drawPath(mPath, getPaint(renderer));
     }
 
-    virtual void onDrawOpDeferred(OpenGLRenderer& renderer) {
+    virtual bool onDefer(OpenGLRenderer& renderer, int* batchId, mergeid_t* mergeId) {
         SkPaint* paint = getPaint(renderer);
         renderer.getCaches().pathCache.precache(mPath, paint);
+
+        *batchId = DeferredDisplayList::kOpBatch_AlphaMaskTexture;
+        return false;
     }
 
     virtual void output(int level, uint32_t logFlags) {
@@ -1048,9 +1140,6 @@
 
     virtual const char* name() { return "DrawPath"; }
 
-    virtual DeferredDisplayList::OpBatchId getBatchId() {
-        return DeferredDisplayList::kOpBatch_AlphaMaskTexture;
-    }
 private:
     SkPath* mPath;
 };
@@ -1063,7 +1152,7 @@
         mLocalBounds.outset(strokeWidthOutset());
     }
 
-    virtual status_t applyDraw(OpenGLRenderer& renderer, Rect& dirty, int level) {
+    virtual status_t applyDraw(OpenGLRenderer& renderer, Rect& dirty) {
         return renderer.drawLines(mPoints, mCount, getPaint(renderer));
     }
 
@@ -1073,10 +1162,11 @@
 
     virtual const char* name() { return "DrawLines"; }
 
-    virtual DeferredDisplayList::OpBatchId getBatchId() {
-        return mPaint->isAntiAlias() ?
+    virtual bool onDefer(OpenGLRenderer& renderer, int* batchId, mergeid_t* mergeId) {
+        *batchId = mPaint->isAntiAlias() ?
                 DeferredDisplayList::kOpBatch_AlphaVertices :
                 DeferredDisplayList::kOpBatch_Vertices;
+        return false;
     }
 
 protected:
@@ -1089,7 +1179,7 @@
     DrawPointsOp(float* points, int count, SkPaint* paint)
             : DrawLinesOp(points, count, paint) {}
 
-    virtual status_t applyDraw(OpenGLRenderer& renderer, Rect& dirty, int level) {
+    virtual status_t applyDraw(OpenGLRenderer& renderer, Rect& dirty) {
         return renderer.drawPoints(mPoints, mCount, getPaint(renderer));
     }
 
@@ -1109,17 +1199,18 @@
         OP_LOG("Draw some text, %d bytes", mBytesCount);
     }
 
-    virtual void onDrawOpDeferred(OpenGLRenderer& renderer) {
+    virtual bool onDefer(OpenGLRenderer& renderer, int* batchId, mergeid_t* mergeId) {
         SkPaint* paint = getPaint(renderer);
         FontRenderer& fontRenderer = renderer.getCaches().fontRenderer->getFontRenderer(paint);
         fontRenderer.precache(paint, mText, mCount, mat4::identity());
-    }
 
-    virtual DeferredDisplayList::OpBatchId getBatchId() {
-        return mPaint->getColor() == 0xff000000 ?
+        *batchId = mPaint->getColor() == 0xff000000 ?
                 DeferredDisplayList::kOpBatch_Text :
                 DeferredDisplayList::kOpBatch_ColorText;
+
+        return false;
     }
+
 protected:
     const char* mText;
     int mBytesCount;
@@ -1135,7 +1226,7 @@
         /* TODO: inherit from DrawBounded and init mLocalBounds */
     }
 
-    virtual status_t applyDraw(OpenGLRenderer& renderer, Rect& dirty, int level) {
+    virtual status_t applyDraw(OpenGLRenderer& renderer, Rect& dirty) {
         return renderer.drawTextOnPath(mText, mBytesCount, mCount, mPath,
                 mHOffset, mVOffset, getPaint(renderer));
     }
@@ -1156,7 +1247,7 @@
         /* TODO: inherit from DrawBounded and init mLocalBounds */
     }
 
-    virtual status_t applyDraw(OpenGLRenderer& renderer, Rect& dirty, int level) {
+    virtual status_t applyDraw(OpenGLRenderer& renderer, Rect& dirty) {
         return renderer.drawPosText(mText, mBytesCount, mCount, mPositions, getPaint(renderer));
     }
 
@@ -1189,12 +1280,7 @@
         memset(&mPrecacheTransform.data[0], 0xff, 16 * sizeof(float));
     }
 
-    /*
-     * When this method is invoked the state field  is initialized to have the
-     * final rendering state. We can thus use it to process data as it will be
-     * used at draw time.
-     */
-    virtual void onDrawOpDeferred(OpenGLRenderer& renderer) {
+    virtual bool onDefer(OpenGLRenderer& renderer, int* batchId, mergeid_t* mergeId) {
         SkPaint* paint = getPaint(renderer);
         FontRenderer& fontRenderer = renderer.getCaches().fontRenderer->getFontRenderer(paint);
         const mat4& transform = renderer.findBestFontTransform(state.mMatrix);
@@ -1202,25 +1288,44 @@
             fontRenderer.precache(paint, mText, mCount, transform);
             mPrecacheTransform = transform;
         }
+        *batchId = mPaint->getColor() == 0xff000000 ?
+                DeferredDisplayList::kOpBatch_Text :
+                DeferredDisplayList::kOpBatch_ColorText;
+
+        *mergeId = (mergeid_t)mPaint->getColor();
+
+        // don't merge decorated text - the decorations won't draw in order
+        bool noDecorations = !(mPaint->getFlags() & (SkPaint::kUnderlineText_Flag |
+                        SkPaint::kStrikeThruText_Flag));
+        return mergeAllowed() && noDecorations;
     }
 
-    virtual status_t applyDraw(OpenGLRenderer& renderer, Rect& dirty, int level) {
+    virtual status_t applyDraw(OpenGLRenderer& renderer, Rect& dirty) {
         return renderer.drawText(mText, mBytesCount, mCount, mX, mY,
                 mPositions, getPaint(renderer), mLength);
     }
 
+    virtual status_t multiDraw(OpenGLRenderer& renderer, Rect& dirty,
+            const Vector<DrawOp*>& ops, const Rect& bounds) {
+        status_t status = DrawGlInfo::kStatusDone;
+        renderer.setFullScreenClip(); // ensure merged ops aren't clipped
+        for (unsigned int i = 0; i < ops.size(); i++) {
+            DrawOpMode drawOpMode = (i == ops.size() - 1) ? kDrawOpMode_Flush : kDrawOpMode_Defer;
+            renderer.restoreDisplayState(ops[i]->state, true); // restore all but the clip
+
+            DrawTextOp& op = *((DrawTextOp*)ops[i]);
+            status |= renderer.drawText(op.mText, op.mBytesCount, op.mCount, op.mX, op.mY,
+                    op.mPositions, op.getPaint(renderer), op.mLength, drawOpMode);
+        }
+        return status;
+    }
+
     virtual void output(int level, uint32_t logFlags) {
         OP_LOG("Draw Text of count %d, bytes %d", mCount, mBytesCount);
     }
 
     virtual const char* name() { return "DrawText"; }
 
-    virtual DeferredDisplayList::OpBatchId getBatchId() {
-        return mPaint->getColor() == 0xff000000 ?
-                DeferredDisplayList::kOpBatch_Text :
-                DeferredDisplayList::kOpBatch_ColorText;
-    }
-
 private:
     const char* mText;
     int mBytesCount;
@@ -1241,7 +1346,7 @@
     DrawFunctorOp(Functor* functor)
             : DrawOp(0), mFunctor(functor) {}
 
-    virtual status_t applyDraw(OpenGLRenderer& renderer, Rect& dirty, int level) {
+    virtual status_t applyDraw(OpenGLRenderer& renderer, Rect& dirty) {
         renderer.startMark("GL functor");
         status_t ret = renderer.callDrawGLFunction(mFunctor, dirty);
         renderer.endMark();
@@ -1269,14 +1374,14 @@
             mDisplayList->defer(deferStruct, level + 1);
         }
     }
-virtual void replay(ReplayStateStruct& replayStruct, int saveCount, int level) {
+    virtual void replay(ReplayStateStruct& replayStruct, int saveCount, int level) {
         if (mDisplayList && mDisplayList->isRenderable()) {
             mDisplayList->replay(replayStruct, level + 1);
         }
     }
 
     // NOT USED since replay() is overridden
-    virtual status_t applyDraw(OpenGLRenderer& renderer, Rect& dirty, int level) {
+    virtual status_t applyDraw(OpenGLRenderer& renderer, Rect& dirty) {
         return DrawGlInfo::kStatusDone;
     }
 
@@ -1299,7 +1404,7 @@
     DrawLayerOp(Layer* layer, float x, float y)
             : DrawOp(0), mLayer(layer), mX(x), mY(y) {}
 
-    virtual status_t applyDraw(OpenGLRenderer& renderer, Rect& dirty, int level) {
+    virtual status_t applyDraw(OpenGLRenderer& renderer, Rect& dirty) {
         return renderer.drawLayer(mLayer, mX, mY);
     }
 
diff --git a/libs/hwui/DisplayListRenderer.cpp b/libs/hwui/DisplayListRenderer.cpp
index 0b8f7e6..876c38a 100644
--- a/libs/hwui/DisplayListRenderer.cpp
+++ b/libs/hwui/DisplayListRenderer.cpp
@@ -276,6 +276,15 @@
     bitmap = refBitmap(bitmap);
     paint = refPaint(paint);
 
+    if (srcLeft == 0 && srcTop == 0 &&
+            srcRight == bitmap->width() && srcBottom == bitmap->height() &&
+            (srcBottom - srcTop == dstBottom - dstTop) &&
+            (srcRight - srcLeft == dstRight - dstLeft)) {
+        // transform simple rect to rect drawing case into position bitmap ops, since they merge
+        addDrawOp(new (alloc()) DrawBitmapOp(bitmap, dstLeft, dstTop, paint));
+        return DrawGlInfo::kStatusDone;
+    }
+
     addDrawOp(new (alloc()) DrawBitmapRectOp(bitmap,
                     srcLeft, srcTop, srcRight, srcBottom,
                     dstLeft, dstTop, dstRight, dstBottom, paint));
@@ -413,7 +422,9 @@
 }
 
 status_t DisplayListRenderer::drawText(const char* text, int bytesCount, int count,
-        float x, float y, const float* positions, SkPaint* paint, float length) {
+        float x, float y, const float* positions, SkPaint* paint,
+        float length, DrawOpMode drawOpMode) {
+
     if (!text || count <= 0) return DrawGlInfo::kStatusDone;
 
     if (length < 0.0f) length = paint->measureText(text, bytesCount);
diff --git a/libs/hwui/DisplayListRenderer.h b/libs/hwui/DisplayListRenderer.h
index 19f7eb6..75abad6 100644
--- a/libs/hwui/DisplayListRenderer.h
+++ b/libs/hwui/DisplayListRenderer.h
@@ -121,8 +121,9 @@
             float hOffset, float vOffset, SkPaint* paint);
     virtual status_t drawPosText(const char* text, int bytesCount, int count,
             const float* positions, SkPaint* paint);
-    virtual status_t drawText(const char* text, int bytesCount, int count,
-            float x, float y, const float* positions, SkPaint* paint, float length);
+    virtual status_t drawText(const char* text, int bytesCount, int count, float x, float y,
+            const float* positions, SkPaint* paint, float length, DrawOpMode drawOpMode);
+
     virtual status_t drawRects(const float* rects, int count, SkPaint* paint);
 
     virtual void resetShader();
diff --git a/libs/hwui/Dither.cpp b/libs/hwui/Dither.cpp
index 51f1e39..19b3849 100644
--- a/libs/hwui/Dither.cpp
+++ b/libs/hwui/Dither.cpp
@@ -75,6 +75,7 @@
 void Dither::clear() {
     if (mInitialized) {
         glDeleteTextures(1, &mDitherTexture);
+        mInitialized = false;
     }
 }
 
diff --git a/libs/hwui/FontRenderer.cpp b/libs/hwui/FontRenderer.cpp
index 6894ef9..543cfa2 100644
--- a/libs/hwui/FontRenderer.cpp
+++ b/libs/hwui/FontRenderer.cpp
@@ -57,7 +57,6 @@
 
     mGammaTable = NULL;
     mInitialized = false;
-    mMaxNumberOfQuads = 1024;
 
     mCurrentCacheTexture = NULL;
 
@@ -293,7 +292,7 @@
 }
 
 CacheTexture* FontRenderer::createCacheTexture(int width, int height, bool allocate) {
-    CacheTexture* cacheTexture = new CacheTexture(width, height, mMaxNumberOfQuads);
+    CacheTexture* cacheTexture = new CacheTexture(width, height, gMaxNumberOfQuads);
 
     if (allocate) {
         Caches::getInstance().activeTexture(0);
@@ -320,12 +319,12 @@
 
 // Avoid having to reallocate memory and render quad by quad
 void FontRenderer::initVertexArrayBuffers() {
-    uint32_t numIndices = mMaxNumberOfQuads * 6;
+    uint32_t numIndices = gMaxNumberOfQuads * 6;
     uint32_t indexBufferSizeBytes = numIndices * sizeof(uint16_t);
     uint16_t* indexBufferData = (uint16_t*) malloc(indexBufferSizeBytes);
 
     // Four verts, two triangles , six indices per quad
-    for (uint32_t i = 0; i < mMaxNumberOfQuads; i++) {
+    for (uint32_t i = 0; i < gMaxNumberOfQuads; i++) {
         int i6 = i * 6;
         int i4 = i * 4;
 
@@ -594,7 +593,7 @@
 
 bool FontRenderer::renderPosText(SkPaint* paint, const Rect* clip, const char *text,
         uint32_t startIndex, uint32_t len, int numGlyphs, int x, int y,
-        const float* positions, Rect* bounds, Functor* functor) {
+        const float* positions, Rect* bounds, Functor* functor, bool forceFinish) {
     if (!mCurrentFont) {
         ALOGE("No font set");
         return false;
@@ -602,7 +601,10 @@
 
     initRender(clip, bounds, functor);
     mCurrentFont->render(paint, text, startIndex, len, numGlyphs, x, y, positions);
-    finishRender();
+
+    if (forceFinish) {
+        finishRender();
+    }
 
     return mDrawn;
 }
diff --git a/libs/hwui/FontRenderer.h b/libs/hwui/FontRenderer.h
index 348b7e3..307a1d9 100644
--- a/libs/hwui/FontRenderer.h
+++ b/libs/hwui/FontRenderer.h
@@ -66,7 +66,8 @@
     // bounds is an out parameter
     bool renderPosText(SkPaint* paint, const Rect* clip, const char *text, uint32_t startIndex,
             uint32_t len, int numGlyphs, int x, int y, const float* positions, Rect* bounds,
-            Functor* functor);
+            Functor* functor, bool forceFinish = true);
+
     // bounds is an out parameter
     bool renderTextOnPath(SkPaint* paint, const Rect* clip, const char *text, uint32_t startIndex,
             uint32_t len, int numGlyphs, SkPath* path, float hOffset, float vOffset, Rect* bounds);
@@ -101,6 +102,8 @@
 private:
     friend class Font;
 
+    static const uint32_t gMaxNumberOfQuads = 2048;
+
     const uint8_t* mGammaTable;
 
     void allocateTextureMemory(CacheTexture* cacheTexture);
@@ -154,7 +157,6 @@
 
     bool mUploadTexture;
 
-    uint32_t mMaxNumberOfQuads;
     uint32_t mIndexBufferID;
 
     Functor* mFunctor;
diff --git a/libs/hwui/OpenGLRenderer.cpp b/libs/hwui/OpenGLRenderer.cpp
index dcd1eb8..f81b4ff 100644
--- a/libs/hwui/OpenGLRenderer.cpp
+++ b/libs/hwui/OpenGLRenderer.cpp
@@ -112,11 +112,9 @@
 
 OpenGLRenderer::OpenGLRenderer():
         mCaches(Caches::getInstance()), mExtensions(Extensions::getInstance()) {
-    mDrawModifiers.mShader = NULL;
-    mDrawModifiers.mColorFilter = NULL;
+    // *set* draw modifiers to be 0
+    memset(&mDrawModifiers, 0, sizeof(mDrawModifiers));
     mDrawModifiers.mOverrideLayerAlpha = 1.0f;
-    mDrawModifiers.mHasShadow = false;
-    mDrawModifiers.mHasDrawFilter = false;
 
     memcpy(mMeshVertices, gMeshVertices, sizeof(gMeshVertices));
 
@@ -1330,10 +1328,9 @@
         }
     }
 
-    if (stateDeferFlags & kStateDeferFlag_Clip) {
+    state.mClipValid = (stateDeferFlags & kStateDeferFlag_Clip);
+    if (state.mClipValid) {
         state.mClip.set(currentClip);
-    } else {
-        state.mClip.setEmpty();
     }
 
     // Transform, drawModifiers, and alpha always deferred, since they are used by state operations
@@ -1344,17 +1341,22 @@
     return false;
 }
 
-void OpenGLRenderer::restoreDisplayState(const DeferredDisplayState& state) {
+void OpenGLRenderer::restoreDisplayState(const DeferredDisplayState& state, bool skipClipRestore) {
     currentTransform().load(state.mMatrix);
     mDrawModifiers = state.mDrawModifiers;
     mSnapshot->alpha = state.mAlpha;
 
-    if (!state.mClip.isEmpty()) {
+    if (state.mClipValid && !skipClipRestore) {
         mSnapshot->setClip(state.mClip.left, state.mClip.top, state.mClip.right, state.mClip.bottom);
         dirtyClip();
     }
 }
 
+void OpenGLRenderer::setFullScreenClip() {
+    mSnapshot->setClip(0, 0, mWidth, mHeight);
+    dirtyClip();
+}
+
 ///////////////////////////////////////////////////////////////////////////////
 // Transforms
 ///////////////////////////////////////////////////////////////////////////////
@@ -1963,6 +1965,42 @@
             (GLvoid*) gMeshTextureOffset, GL_TRIANGLE_STRIP, gMeshCount, ignoreTransform);
 }
 
+status_t OpenGLRenderer::drawBitmaps(SkBitmap* bitmap, int bitmapCount, TextureVertex* vertices,
+        const Rect& bounds, SkPaint* paint) {
+
+    // merged draw operations don't need scissor, but clip should still be valid
+    mCaches.setScissorEnabled(mScissorOptimizationDisabled);
+
+    mCaches.activeTexture(0);
+    Texture* texture = mCaches.textureCache.get(bitmap);
+    if (!texture) return DrawGlInfo::kStatusDone;
+    const AutoTexture autoCleanup(texture);
+
+    int alpha;
+    SkXfermode::Mode mode;
+    getAlphaAndMode(paint, &alpha, &mode);
+
+    texture->setWrap(GL_CLAMP_TO_EDGE, true);
+    texture->setFilter(GL_NEAREST, true); // merged ops are always pure-translation for now
+
+    const float x = (int) floorf(bounds.left + 0.5f);
+    const float y = (int) floorf(bounds.top + 0.5f);
+    if (CC_UNLIKELY(bitmap->getConfig() == SkBitmap::kA8_Config)) {
+        int color = paint != NULL ? paint->getColor() : 0;
+        drawAlpha8TextureMesh(x, y, x + bounds.getWidth(), y + bounds.getHeight(),
+                texture->id, paint != NULL, color, alpha, mode,
+                &vertices[0].position[0], &vertices[0].texture[0],
+                GL_TRIANGLES, bitmapCount * 6, true, true);
+    } else {
+        drawTextureMesh(x, y, x + bounds.getWidth(), y + bounds.getHeight(),
+                texture->id, alpha / 255.0f, mode, texture->blend,
+                &vertices[0].position[0], &vertices[0].texture[0],
+                GL_TRIANGLES, bitmapCount * 6, false, true, 0, true);
+    }
+
+    return DrawGlInfo::kStatusDrew;
+}
+
 status_t OpenGLRenderer::drawBitmap(SkBitmap* bitmap, float left, float top, SkPaint* paint) {
     const float right = left + bitmap->width();
     const float bottom = top + bitmap->height();
@@ -2796,8 +2834,11 @@
 }
 
 status_t OpenGLRenderer::drawText(const char* text, int bytesCount, int count,
-        float x, float y, const float* positions, SkPaint* paint, float length) {
-    if (text == NULL || count == 0 || mSnapshot->isIgnored() || canSkipText(paint)) {
+        float x, float y, const float* positions, SkPaint* paint, float length,
+        DrawOpMode drawOpMode) {
+
+    if (drawOpMode == kDrawOpMode_Immediate &&
+            (text == NULL || count == 0 || mSnapshot->isIgnored() || canSkipText(paint))) {
         return DrawGlInfo::kStatusDone;
     }
 
@@ -2815,8 +2856,13 @@
 
     SkPaint::FontMetrics metrics;
     paint->getFontMetrics(&metrics, 0.0f);
-    if (quickReject(x, y + metrics.fTop, x + length, y + metrics.fBottom)) {
-        return DrawGlInfo::kStatusDone;
+    if (drawOpMode == kDrawOpMode_Immediate) {
+        if (quickReject(x, y + metrics.fTop, x + length, y + metrics.fBottom)) {
+            return DrawGlInfo::kStatusDone;
+        }
+    } else {
+        // merged draw operations don't need scissor, but clip should still be valid
+        mCaches.setScissorEnabled(mScissorOptimizationDisabled);
     }
 
     const float oldX = x;
@@ -2868,17 +2914,20 @@
 
     bool status;
     TextSetupFunctor functor(*this, x, y, pureTranslate, alpha, mode, paint);
+
+    // don't call issuedrawcommand, do it at end of batch
+    bool forceFinish = (drawOpMode != kDrawOpMode_Defer);
     if (CC_UNLIKELY(paint->getTextAlign() != SkPaint::kLeft_Align)) {
         SkPaint paintCopy(*paint);
         paintCopy.setTextAlign(SkPaint::kLeft_Align);
         status = fontRenderer.renderPosText(&paintCopy, clip, text, 0, bytesCount, count, x, y,
-                positions, hasActiveLayer ? &bounds : NULL, &functor);
+                positions, hasActiveLayer ? &bounds : NULL, &functor, forceFinish);
     } else {
         status = fontRenderer.renderPosText(paint, clip, text, 0, bytesCount, count, x, y,
-                positions, hasActiveLayer ? &bounds : NULL, &functor);
+                positions, hasActiveLayer ? &bounds : NULL, &functor, forceFinish);
     }
 
-    if (status && hasActiveLayer) {
+    if ((status || drawOpMode != kDrawOpMode_Immediate) && hasActiveLayer) {
         if (!pureTranslate) {
             transform.mapRect(bounds);
         }
@@ -3093,7 +3142,11 @@
 ///////////////////////////////////////////////////////////////////////////////
 
 void OpenGLRenderer::resetPaintFilter() {
+    // when clearing the PaintFilter, the masks should also be cleared for simple DrawModifier
+    // comparison, see MergingDrawBatch::canMergeWith
     mDrawModifiers.mHasDrawFilter = false;
+    mDrawModifiers.mPaintFilterClearBits = 0;
+    mDrawModifiers.mPaintFilterSetBits = 0;
 }
 
 void OpenGLRenderer::setupPaintFilter(int clearBits, int setBits) {
@@ -3365,7 +3418,7 @@
 void OpenGLRenderer::drawAlpha8TextureMesh(float left, float top, float right, float bottom,
         GLuint texture, bool hasColor, int color, int alpha, SkXfermode::Mode mode,
         GLvoid* vertices, GLvoid* texCoords, GLenum drawMode, GLsizei elementsCount,
-        bool ignoreTransform, bool dirty) {
+        bool ignoreTransform, bool ignoreScale, bool dirty) {
 
     setupDraw();
     setupDrawWithTexture(true);
@@ -3377,7 +3430,11 @@
     setupDrawBlending(true, mode);
     setupDrawProgram();
     if (!dirty) setupDrawDirtyRegionsDisabled();
-    setupDrawModelView(left, top, right, bottom, ignoreTransform);
+    if (!ignoreScale) {
+        setupDrawModelView(left, top, right, bottom, ignoreTransform);
+    } else {
+        setupDrawModelViewTranslate(left, top, right, bottom, ignoreTransform);
+    }
     setupDrawTexture(texture);
     setupDrawPureColorUniforms();
     setupDrawColorFilterUniforms();
diff --git a/libs/hwui/OpenGLRenderer.h b/libs/hwui/OpenGLRenderer.h
index dd7a5a2..a0ad888 100644
--- a/libs/hwui/OpenGLRenderer.h
+++ b/libs/hwui/OpenGLRenderer.h
@@ -71,10 +71,17 @@
     kStateDeferFlag_Clip = 0x2
 };
 
+enum DrawOpMode {
+    kDrawOpMode_Immediate,
+    kDrawOpMode_Defer,
+    kDrawOpMode_Flush
+};
+
 struct DeferredDisplayState {
-    Rect mBounds; // local bounds, mapped with matrix to be in screen space coordinates, clipped.
+    Rect mBounds; // global op bounds, mapped by mMatrix to be in screen space coordinates, clipped.
 
     // the below are set and used by the OpenGLRenderer at record and deferred playback
+    bool mClipValid;
     Rect mClip;
     mat4 mMatrix;
     DrawModifiers mDrawModifiers;
@@ -232,6 +239,8 @@
     virtual void outputDisplayList(DisplayList* displayList);
     virtual status_t drawLayer(Layer* layer, float x, float y);
     virtual status_t drawBitmap(SkBitmap* bitmap, float left, float top, SkPaint* paint);
+    status_t drawBitmaps(SkBitmap* bitmap, int bitmapCount, TextureVertex* vertices,
+            const Rect& bounds, SkPaint* paint);
     virtual status_t drawBitmap(SkBitmap* bitmap, SkMatrix* matrix, SkPaint* paint);
     virtual status_t drawBitmap(SkBitmap* bitmap, float srcLeft, float srcTop,
             float srcRight, float srcBottom, float dstLeft, float dstTop,
@@ -261,7 +270,8 @@
     virtual status_t drawPosText(const char* text, int bytesCount, int count,
             const float* positions, SkPaint* paint);
     virtual status_t drawText(const char* text, int bytesCount, int count, float x, float y,
-            const float* positions, SkPaint* paint, float length = -1.0f);
+            const float* positions, SkPaint* paint, float length = -1.0f,
+            DrawOpMode drawOpMode = kDrawOpMode_Immediate);
     virtual status_t drawRects(const float* rects, int count, SkPaint* paint);
 
     virtual void resetShader();
@@ -282,7 +292,8 @@
     SkPaint* filterPaint(SkPaint* paint);
 
     bool storeDisplayState(DeferredDisplayState& state, int stateDeferFlags);
-    void restoreDisplayState(const DeferredDisplayState& state);
+    void restoreDisplayState(const DeferredDisplayState& state, bool skipClipRestore = false);
+    void setFullScreenClip();
 
     const DrawModifiers& getDrawModifiers() { return mDrawModifiers; }
     void setDrawModifiers(const DrawModifiers& drawModifiers) { mDrawModifiers = drawModifiers; }
@@ -336,20 +347,18 @@
      * @param mode Where to store the resulting xfermode
      */
     static inline void getAlphaAndModeDirect(SkPaint* paint, int* alpha, SkXfermode::Mode* mode) {
-        if (paint) {
-            *mode = getXfermode(paint->getXfermode());
+        *mode = getXfermodeDirect(paint);
+        *alpha = getAlphaDirect(paint);
+    }
 
-            // Skia draws using the color's alpha channel if < 255
-            // Otherwise, it uses the paint's alpha
-            int color = paint->getColor();
-            *alpha = (color >> 24) & 0xFF;
-            if (*alpha == 255) {
-                *alpha = paint->getAlpha();
-            }
-        } else {
-            *mode = SkXfermode::kSrcOver_Mode;
-            *alpha = 255;
-        }
+    static inline SkXfermode::Mode getXfermodeDirect(SkPaint* paint) {
+        if (!paint) return SkXfermode::kSrcOver_Mode;
+        return getXfermode(paint->getXfermode());
+    }
+
+    static inline int getAlphaDirect(SkPaint* paint) {
+        if (!paint) return 255;
+        return paint->getAlpha();
     }
 
     /**
@@ -358,6 +367,20 @@
      */
     mat4 findBestFontTransform(const mat4& transform) const;
 
+#if DEBUG_MERGE_BEHAVIOR
+    void drawScreenSpaceColorRect(float left, float top, float right, float bottom, int color) {
+        mCaches.setScissorEnabled(false);
+
+        // should only be called outside of other draw ops, so stencil can only be in test state
+        bool stencilWasEnabled = mCaches.stencil.isTestEnabled();
+        mCaches.stencil.disable();
+
+        drawColorRect(left, top, right, bottom, color, SkXfermode::kSrcOver_Mode, true);
+
+        if (stencilWasEnabled) mCaches.stencil.enableTest();
+    }
+#endif
+
 protected:
     /**
      * Computes the projection matrix, initialize the first snapshot
@@ -778,7 +801,7 @@
     void drawAlpha8TextureMesh(float left, float top, float right, float bottom,
             GLuint texture, bool hasColor, int color, int alpha, SkXfermode::Mode mode,
             GLvoid* vertices, GLvoid* texCoords, GLenum drawMode, GLsizei elementsCount,
-            bool ignoreTransform, bool dirty = true);
+            bool ignoreTransform, bool ignoreScale = false, bool dirty = true);
 
     /**
      * Draws text underline and strike-through if needed.
diff --git a/libs/hwui/utils/TinyHashMap.h b/libs/hwui/utils/TinyHashMap.h
new file mode 100644
index 0000000..8855140
--- /dev/null
+++ b/libs/hwui/utils/TinyHashMap.h
@@ -0,0 +1,72 @@
+/*
+ * Copyright (C) 2013 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef ANDROID_HWUI_TINYHASHMAP_H
+#define ANDROID_HWUI_TINYHASHMAP_H
+
+#include <utils/BasicHashtable.h>
+
+namespace android {
+namespace uirenderer {
+
+/**
+ * A very simple hash map that doesn't allow duplicate keys, overwriting the older entry.
+ *
+ * Currently, expects simple keys that are handled by hash_t()
+ */
+template <typename TKey, typename TValue>
+class TinyHashMap {
+public:
+    typedef key_value_pair_t<TKey, TValue> TEntry;
+
+    /**
+     * Puts an entry in the hash, removing any existing entry with the same key
+     */
+    void put(TKey key, TValue value) {
+        hash_t hash = hash_t(key);
+
+        ssize_t index = mTable.find(-1, hash, key);
+        if (index != -1) {
+            mTable.removeAt(index);
+        }
+
+        TEntry initEntry(key, value);
+        mTable.add(hash, initEntry);
+    }
+
+    /**
+     * Return true if key is in the map, in which case stores the value in the output ref
+     */
+    bool get(TKey key, TValue& outValue) {
+        hash_t hash = hash_t(key);
+        ssize_t index = mTable.find(-1, hash, key);
+        if (index == -1) {
+            return false;
+        }
+        outValue = mTable.entryAt(index).value;
+        return true;
+    }
+
+    void clear() { mTable.clear(); }
+
+private:
+    BasicHashtable<TKey, TEntry> mTable;
+};
+
+}; // namespace uirenderer
+}; // namespace android
+
+#endif // ANDROID_HWUI_TINYHASHMAP_H
diff --git a/media/java/android/media/MediaDrm.java b/media/java/android/media/MediaDrm.java
index 4eb0c56..6872278 100644
--- a/media/java/android/media/MediaDrm.java
+++ b/media/java/android/media/MediaDrm.java
@@ -215,6 +215,7 @@
 
     public static final int MEDIA_DRM_KEY_TYPE_STREAMING = 1;
     public static final int MEDIA_DRM_KEY_TYPE_OFFLINE = 2;
+    public static final int MEDIA_DRM_KEY_TYPE_RELEASE = 3;
 
     public final class KeyRequest {
         public KeyRequest() {}
@@ -223,28 +224,36 @@
     };
 
     /**
-     * A key request/response exchange occurs between the app and a license
-     * server to obtain the keys to decrypt encrypted content.  getKeyRequest()
-     * is used to obtain an opaque key request byte array that is delivered to the
-     * license server.  The opaque key request byte array is returned in
-     * KeyRequest.data.  The recommended URL to deliver the key request to is
+     * A key request/response exchange occurs between the app and a license server
+     * to obtain or release keys used to decrypt encrypted content.
+     * getKeyRequest() is used to obtain an opaque key request byte array that is
+     * delivered to the license server.  The opaque key request byte array is returned
+     * in KeyRequest.data.  The recommended URL to deliver the key request to is
      * returned in KeyRequest.defaultUrl.
      *
      * After the app has received the key request response from the server,
      * it should deliver to the response to the DRM engine plugin using the method
      * {@link #provideKeyResponse}.
      *
-     * @param sessonId the session ID for the drm session
+     * @param scope may be a sessionId or a keySetId, depending on the specified keyType.
+     * When the keyType is MEDIA_DRM_KEY_TYPE_STREAMING or MEDIA_DRM_KEY_TYPE_OFFLINE,
+     * scope should be set to the sessionId the keys will be provided to.  When the keyType
+     * is MEDIA_DRM_KEY_TYPE_RELEASE, scope should be set to the keySetId of the keys
+     * being released. Releasing keys from a device invalidates them for all sessions.
      * @param init container-specific data, its meaning is interpreted based on the
      * mime type provided in the mimeType parameter.  It could contain, for example,
      * the content ID, key ID or other data obtained from the content metadata that is
-     * required in generating the key request.
+     * required in generating the key request. init may be null when keyType is
+     * MEDIA_DRM_KEY_TYPE_RELEASE.
      * @param mimeType identifies the mime type of the content
-     * @param keyType specifes if the request is for streaming or offline content
+     * @param keyType specifes the type of the request. The request may be to acquire
+     * keys for streaming or offline content, or to release previously acquired
+     * keys, which are identified by a keySetId.
+
      * @param optionalParameters are included in the key request message to
      * allow a client application to provide additional message parameters to the server.
      */
-    public native KeyRequest getKeyRequest(byte[] sessionId, byte[] init,
+    public native KeyRequest getKeyRequest(byte[] scope, byte[] init,
                                            String mimeType, int keyType,
                                            HashMap<String, String> optionalParameters)
         throws MediaDrmException;
@@ -272,13 +281,11 @@
         throws MediaDrmException;
 
     /**
-     * Remove the persisted keys associated with an offline license.  Keys are persisted
-     * when {@link provideKeyResponse} is called with keys obtained from the method
-     * {@link getKeyRequest} using keyType = MEDIA_DRM_KEY_TYPE_OFFLINE.
+     * Remove the current keys from a session.
      *
-     * @param keySetId identifies the saved key set to remove
+     * @param sessionId the session ID for the DRM session
      */
-    public native void removeKeys(byte[] keySetId) throws MediaDrmException;
+    public native void removeKeys(byte[] sessionId) throws MediaDrmException;
 
     /**
      * Request an informative description of the key status for the session.  The status is
diff --git a/media/java/android/media/MediaExtractor.java b/media/java/android/media/MediaExtractor.java
index 286e203..cf159f0 100644
--- a/media/java/android/media/MediaExtractor.java
+++ b/media/java/android/media/MediaExtractor.java
@@ -67,7 +67,7 @@
      * Sets the DataSource object to be used as the data source for this extractor
      * {@hide}
      */
-    public native final void setDataSource(DataSource source);
+    public native final void setDataSource(DataSource source) throws IOException;
 
     /**
      * Sets the data source as a content Uri.
@@ -121,7 +121,8 @@
      * @param path the path of the file, or the http URL
      * @param headers the headers associated with the http request for the stream you want to play
      */
-    public final void setDataSource(String path, Map<String, String> headers) {
+    public final void setDataSource(String path, Map<String, String> headers)
+        throws IOException {
         String[] keys = null;
         String[] values = null;
 
@@ -140,7 +141,7 @@
     }
 
     private native final void setDataSource(
-            String path, String[] keys, String[] values);
+            String path, String[] keys, String[] values) throws IOException;
 
     /**
      * Sets the data source (file-path or http URL) to use.
@@ -154,7 +155,7 @@
      * As an alternative, the application could first open the file for reading,
      * and then use the file descriptor form {@link #setDataSource(FileDescriptor)}.
      */
-    public final void setDataSource(String path) {
+    public final void setDataSource(String path) throws IOException {
         setDataSource(path, null, null);
     }
 
@@ -164,7 +165,7 @@
      *
      * @param fd the FileDescriptor for the file you want to extract from.
      */
-    public final void setDataSource(FileDescriptor fd) {
+    public final void setDataSource(FileDescriptor fd) throws IOException {
         setDataSource(fd, 0, 0x7ffffffffffffffL);
     }
 
@@ -178,7 +179,7 @@
      * @param length the length in bytes of the data to be extracted
      */
     public native final void setDataSource(
-            FileDescriptor fd, long offset, long length);
+            FileDescriptor fd, long offset, long length) throws IOException;
 
     @Override
     protected void finalize() {
diff --git a/media/java/android/media/MediaPlayer.java b/media/java/android/media/MediaPlayer.java
index 85a32ca..f745163 100644
--- a/media/java/android/media/MediaPlayer.java
+++ b/media/java/android/media/MediaPlayer.java
@@ -1181,7 +1181,8 @@
     /**
      * Gets the duration of the file.
      *
-     * @return the duration in milliseconds
+     * @return the duration in milliseconds, if no duration is available
+     *         (for example, if streaming live content), -1 is returned.
      */
     public native int getDuration();
 
diff --git a/media/java/android/media/RemoteControlClient.java b/media/java/android/media/RemoteControlClient.java
index 93bcf03..4a5e82e 100644
--- a/media/java/android/media/RemoteControlClient.java
+++ b/media/java/android/media/RemoteControlClient.java
@@ -277,14 +277,12 @@
      */
     public final static int FLAG_KEY_MEDIA_NEXT = 1 << 7;
     /**
-     * @hide
-     * TODO un-hide and add in javadoc of setTransportControlFlags(int)
      * Flag indicating a RemoteControlClient can receive changes in the media playback position
-     * through the {@link #OnPlaybackPositionUpdateListener} interface. This flag must be set
+     * through the {@link OnPlaybackPositionUpdateListener} interface. This flag must be set
      * in order for components that display the RemoteControlClient information, to display and
      * let the user control media playback position.
      * @see #setTransportControlFlags(int)
-     * @see #setPlaybackPositionProvider(PlaybackPositionProvider)
+     * @see #setOnGetPlaybackPositionListener(OnGetPlaybackPositionListener)
      * @see #setPlaybackPositionUpdateListener(OnPlaybackPositionUpdateListener)
      */
     public final static int FLAG_KEY_MEDIA_POSITION_UPDATE = 1 << 8;
@@ -607,8 +605,6 @@
     }
 
     /**
-     * @hide
-     * TODO un-hide
      * Sets the current playback state and the matching media position for the current playback
      *   speed.
      * @param state The current playback state, one of the following values:
@@ -660,7 +656,8 @@
      *      {@link #FLAG_KEY_MEDIA_PAUSE},
      *      {@link #FLAG_KEY_MEDIA_STOP},
      *      {@link #FLAG_KEY_MEDIA_FAST_FORWARD},
-     *      {@link #FLAG_KEY_MEDIA_NEXT}
+     *      {@link #FLAG_KEY_MEDIA_NEXT},
+     *      {@link #FLAG_KEY_MEDIA_POSITION_UPDATE}
      */
     public void setTransportControlFlags(int transportControlFlags) {
         synchronized(mCacheLock) {
@@ -673,8 +670,6 @@
     }
 
     /**
-     * @hide
-     * TODO un-hide
      * Interface definition for a callback to be invoked when the media playback position is
      * requested to be updated.
      * @see RemoteControlClient#FLAG_KEY_MEDIA_POSITION_UPDATE
@@ -684,7 +679,7 @@
          * Called on the implementer to notify it that the playback head should be set at the given
          * position. If the position can be changed from its current value, the implementor of
          * the interface must also update the playback position using
-         * {@link RemoteControlClient#setPlaybackState(int, long, int)} to reflect the actual new
+         * {@link #setPlaybackState(int, long, float)} to reflect the actual new
          * position being used, regardless of whether it differs from the requested position.
          * Failure to do so would cause the system to not know the new actual playback position,
          * and user interface components would fail to show the user where playback resumed after
@@ -695,30 +690,26 @@
     }
 
     /**
-     * @hide
-     * TODO un-hide
      * Interface definition for a callback to be invoked when the media playback position is
      * queried.
      * @see RemoteControlClient#FLAG_KEY_MEDIA_POSITION_UPDATE
      */
-    public interface PlaybackPositionProvider {
+    public interface OnGetPlaybackPositionListener {
         /**
          * Called on the implementer of the interface to query the current playback position.
          * @return a negative value if the current playback position (or the last valid playback
          *     position) is not known, or a zero or positive value expressed in ms indicating the
          *     current position, or the last valid known position.
          */
-        long getPlaybackPosition();
+        long onGetPlaybackPosition();
     }
 
     /**
-     * @hide
-     * TODO un-hide
      * Sets the listener to be called whenever the media playback position is requested
      * to be updated.
      * Notifications will be received in the same thread as the one in which RemoteControlClient
      * was created.
-     * @param l
+     * @param l the position update listener to be called
      */
     public void setPlaybackPositionUpdateListener(OnPlaybackPositionUpdateListener l) {
         synchronized(mCacheLock) {
@@ -737,14 +728,12 @@
     }
 
     /**
-     * @hide
-     * TODO un-hide
      * Sets the listener to be called whenever the media current playback position is needed.
      * Queries will be received in the same thread as the one in which RemoteControlClient
      * was created.
-     * @param l
+     * @param l the listener to be called to retrieve the playback position
      */
-    public void setPlaybackPositionProvider(PlaybackPositionProvider l) {
+    public void setOnGetPlaybackPositionListener(OnGetPlaybackPositionListener l) {
         synchronized(mCacheLock) {
             int oldCapa = mPlaybackPositionCapabilities;
             if (l != null) {
@@ -942,7 +931,7 @@
     /**
      * Provider registered by user of RemoteControlClient to provide the current playback position.
      */
-    private PlaybackPositionProvider mPositionProvider;
+    private OnGetPlaybackPositionListener mPositionProvider;
     /**
      * The current remote control client generation ID across the system, as known by this object
      */
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBar.java b/packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBar.java
index c2dc159..d98f08e 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBar.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBar.java
@@ -105,7 +105,7 @@
     public static final boolean DEBUG = BaseStatusBar.DEBUG;
     public static final boolean SPEW = DEBUG;
     public static final boolean DUMPTRUCK = true; // extra dumpsys info
-    public static final boolean DEBUG_GESTURES = true;
+    public static final boolean DEBUG_GESTURES = false;
 
     public static final boolean DEBUG_CLINGS = false;
 
diff --git a/policy/src/com/android/internal/policy/impl/keyguard/KeyguardFaceUnlockView.java b/policy/src/com/android/internal/policy/impl/keyguard/KeyguardFaceUnlockView.java
index 965e378..7315aad 100644
--- a/policy/src/com/android/internal/policy/impl/keyguard/KeyguardFaceUnlockView.java
+++ b/policy/src/com/android/internal/policy/impl/keyguard/KeyguardFaceUnlockView.java
@@ -151,7 +151,9 @@
     public void onResume(int reason) {
         if (DEBUG) Log.d(TAG, "onResume()");
         mIsShowing = KeyguardUpdateMonitor.getInstance(mContext).isKeyguardVisible();
-        maybeStartBiometricUnlock();
+        if (!KeyguardUpdateMonitor.getInstance(mContext).isSwitchingUser()) {
+          maybeStartBiometricUnlock();
+        }
         KeyguardUpdateMonitor.getInstance(mContext).registerCallback(mUpdateCallback);
 
         // Registers a callback which handles stopping the biometric unlock and restarting it in
@@ -269,6 +271,14 @@
         }
 
         @Override
+        public void onUserSwitchComplete(int userId) {
+            if (DEBUG) Log.d(TAG, "onUserSwitchComplete(" + userId + ")");
+            if (mBiometricUnlock != null) {
+                maybeStartBiometricUnlock();
+            }
+        }
+
+        @Override
         public void onKeyguardVisibilityChanged(boolean showing) {
             if (DEBUG) Log.d(TAG, "onKeyguardVisibilityChanged(" + showing + ")");
             boolean wasShowing = false;
diff --git a/policy/src/com/android/internal/policy/impl/keyguard/KeyguardUpdateMonitor.java b/policy/src/com/android/internal/policy/impl/keyguard/KeyguardUpdateMonitor.java
index ad87a4b..986dc49 100644
--- a/policy/src/com/android/internal/policy/impl/keyguard/KeyguardUpdateMonitor.java
+++ b/policy/src/com/android/internal/policy/impl/keyguard/KeyguardUpdateMonitor.java
@@ -124,6 +124,8 @@
             mCallbacks = Lists.newArrayList();
     private ContentObserver mDeviceProvisionedObserver;
 
+    private boolean mSwitchingUser;
+
     private final Handler mHandler = new Handler() {
         @Override
         public void handleMessage(Message msg) {
@@ -461,11 +463,13 @@
                         public void onUserSwitching(int newUserId, IRemoteCallback reply) {
                             mHandler.sendMessage(mHandler.obtainMessage(MSG_USER_SWITCHING,
                                     newUserId, 0, reply));
+                            mSwitchingUser = true;
                         }
                         @Override
                         public void onUserSwitchComplete(int newUserId) throws RemoteException {
                             mHandler.sendMessage(mHandler.obtainMessage(MSG_USER_SWITCH_COMPLETE,
                                     newUserId));
+                            mSwitchingUser = false;
                         }
                     });
         } catch (RemoteException e) {
@@ -529,7 +533,6 @@
                 cb.onUserSwitching(userId);
             }
         }
-        setAlternateUnlockEnabled(false);
         try {
             reply.sendResult(null);
         } catch (RemoteException e) {
@@ -733,6 +736,10 @@
         return mKeyguardIsVisible;
     }
 
+    public boolean isSwitchingUser() {
+        return mSwitchingUser;
+    }
+
     private static boolean isBatteryUpdateInteresting(BatteryStatus old, BatteryStatus current) {
         final boolean nowPluggedIn = current.isPluggedIn();
         final boolean wasPluggedIn = old.isPluggedIn();
diff --git a/policy/src/com/android/internal/policy/impl/keyguard/KeyguardViewMediator.java b/policy/src/com/android/internal/policy/impl/keyguard/KeyguardViewMediator.java
index c49228e..08a95a6 100644
--- a/policy/src/com/android/internal/policy/impl/keyguard/KeyguardViewMediator.java
+++ b/policy/src/com/android/internal/policy/impl/keyguard/KeyguardViewMediator.java
@@ -319,8 +319,9 @@
                 mSwitchingUser = true;
                 resetStateLocked(null);
                 adjustStatusBarLocked();
-                // Disable face unlock when the user switches.
-                KeyguardUpdateMonitor.getInstance(mContext).setAlternateUnlockEnabled(false);
+                // When we switch users we want to bring the new user to the biometric unlock even
+                // if the current user has gone to the backup.
+                KeyguardUpdateMonitor.getInstance(mContext).setAlternateUnlockEnabled(true);
             }
         }
 
diff --git a/services/java/com/android/server/accessibility/AccessibilityManagerService.java b/services/java/com/android/server/accessibility/AccessibilityManagerService.java
index 110c4da..128a49f 100644
--- a/services/java/com/android/server/accessibility/AccessibilityManagerService.java
+++ b/services/java/com/android/server/accessibility/AccessibilityManagerService.java
@@ -1817,11 +1817,13 @@
                 addServiceLocked(this, userState);
                 if (userState.mBindingServices.contains(mComponentName)) {
                     userState.mBindingServices.remove(mComponentName);
-                    onUserStateChangedLocked(userState);
                     try {
-                        mServiceInterface.setConnection(this, mId);
+                       mServiceInterface.setConnection(this, mId);
+                       onUserStateChangedLocked(userState);
                     } catch (RemoteException re) {
-                        Slog.w(LOG_TAG, "Error while setting connection for service: " + service, re);
+                        Slog.w(LOG_TAG, "Error while setting connection for service: "
+                                + service, re);
+                        binderDied();
                     }
                 } else {
                     binderDied();
@@ -2499,7 +2501,9 @@
             public void flush() {
                 synchronized (mLock) {
                     cancelAllPendingEventsLocked();
-                    mSentEventsVerifier.reset();
+                    if (mSentEventsVerifier != null) {
+                        mSentEventsVerifier.reset();
+                    }
                 }
             }
 
diff --git a/services/java/com/android/server/am/ActivityManagerService.java b/services/java/com/android/server/am/ActivityManagerService.java
index 2417cff..bc1df85 100644
--- a/services/java/com/android/server/am/ActivityManagerService.java
+++ b/services/java/com/android/server/am/ActivityManagerService.java
@@ -936,6 +936,12 @@
     CompatModeDialog mCompatModeDialog;
     long mLastMemUsageReportTime = 0;
 
+    /**
+     * Flag whether the current user is a "monkey", i.e. whether
+     * the UI is driven by a UI automation tool.
+     */
+    private boolean mUserIsMonkey;
+
     final Handler mHandler = new Handler() {
         //public Handler() {
         //    if (localLOGV) Slog.v(TAG, "Handler started!");
@@ -7434,11 +7440,27 @@
         }
     }
 
-    public boolean isUserAMonkey() {
-        // For now the fact that there is a controller implies
-        // we have a monkey.
+    public void setUserIsMonkey(boolean userIsMonkey) {
         synchronized (this) {
-            return mController != null;
+            synchronized (mPidsSelfLocked) {
+                final int callingPid = Binder.getCallingPid();
+                ProcessRecord precessRecord = mPidsSelfLocked.get(callingPid);
+                if (precessRecord == null) {
+                    throw new SecurityException("Unknown process: " + callingPid);
+                }
+                if (precessRecord.instrumentationUiAutomationConnection  == null) {
+                    throw new SecurityException("Only an instrumentation process "
+                            + "with a UiAutomation can call setUserIsMonkey");
+                }
+            }
+            mUserIsMonkey = userIsMonkey;
+        }
+    }
+
+    public boolean isUserAMonkey() {
+        synchronized (this) {
+            // If there is a controller also implies the user is a monkey.
+            return (mUserIsMonkey || mController != null);
         }
     }
 
@@ -12435,6 +12457,9 @@
             } catch (RemoteException re) {
                 /* ignore */
             }
+            // Only a UiAutomation can set this flag and now that
+            // it is finished we make sure it is reset to its default.
+            mUserIsMonkey = false;
         }
         app.instrumentationWatcher = null;
         app.instrumentationUiAutomationConnection = null;