diff --git a/include/private/surfaceflinger/SharedBufferStack.h b/include/private/surfaceflinger/SharedBufferStack.h
index dcce25e..c11c855 100644
--- a/include/private/surfaceflinger/SharedBufferStack.h
+++ b/include/private/surfaceflinger/SharedBufferStack.h
@@ -122,7 +122,8 @@
     volatile int8_t index[NUM_BUFFER_MAX];
 
     int32_t     identity;       // surface's identity (const)
-    int32_t     reserved32[2];
+    int32_t     token;          // surface's token (for debugging)
+    int32_t     reserved32[1];
     Statistics  stats;
     int32_t     reserved;
     BufferData  buffers[NUM_BUFFER_MAX];     // 960 bytes
diff --git a/include/surfaceflinger/ISurfaceComposer.h b/include/surfaceflinger/ISurfaceComposer.h
index 3271cfd..dd44aa5 100644
--- a/include/surfaceflinger/ISurfaceComposer.h
+++ b/include/surfaceflinger/ISurfaceComposer.h
@@ -85,9 +85,12 @@
     /* create connection with surface flinger, requires
      * ACCESS_SURFACE_FLINGER permission
      */
-
     virtual sp<ISurfaceComposerClient> createConnection() = 0;
 
+    /* create a client connection with surface flinger
+     */
+    virtual sp<ISurfaceComposerClient> createClientConnection() = 0;
+
     /* retrieve the control block */
     virtual sp<IMemoryHeap> getCblk() const = 0;
 
@@ -123,6 +126,7 @@
         // Java by ActivityManagerService.
         BOOT_FINISHED = IBinder::FIRST_CALL_TRANSACTION,
         CREATE_CONNECTION,
+        CREATE_CLIENT_CONNECTION,
         GET_CBLK,
         OPEN_GLOBAL_TRANSACTION,
         CLOSE_GLOBAL_TRANSACTION,
diff --git a/include/surfaceflinger/ISurfaceComposerClient.h b/include/surfaceflinger/ISurfaceComposerClient.h
index b2a4766..a1e9e04 100644
--- a/include/surfaceflinger/ISurfaceComposerClient.h
+++ b/include/surfaceflinger/ISurfaceComposerClient.h
@@ -58,6 +58,7 @@
     };
 
     virtual sp<IMemoryHeap> getControlBlock() const = 0;
+    virtual ssize_t getTokenForSurface(const sp<ISurface>& sur) const = 0;
 
     /*
      * Requires ACCESS_SURFACE_FLINGER permission
diff --git a/include/surfaceflinger/Surface.h b/include/surfaceflinger/Surface.h
index 2957970..67dc693 100644
--- a/include/surfaceflinger/Surface.h
+++ b/include/surfaceflinger/Surface.h
@@ -229,7 +229,6 @@
      */
     void init();
     status_t validate() const;
-    status_t initCheck() const;
     sp<ISurface> getISurface() const;
 
     inline const GraphicBufferMapper& getBufferMapper() const { return mBufferMapper; }
@@ -264,15 +263,15 @@
     };
 
     // constants
-    sp<SurfaceClient>           mClient;
+    GraphicBufferMapper&        mBufferMapper;
+    SurfaceClient&              mClient;
+    SharedBufferClient*         mSharedBufferClient;
+    status_t                    mInitCheck;
     sp<ISurface>                mSurface;
     SurfaceID                   mToken;
     uint32_t                    mIdentity;
     PixelFormat                 mFormat;
     uint32_t                    mFlags;
-    GraphicBufferMapper&        mBufferMapper;
-    SharedBufferClient*         mSharedBufferClient;
-    status_t                    mInitCheck;
 
     // protected by mSurfaceLock
     Rect                        mSwapRectangle;
diff --git a/include/surfaceflinger/SurfaceComposerClient.h b/include/surfaceflinger/SurfaceComposerClient.h
index 8e28a81..8773d71 100644
--- a/include/surfaceflinger/SurfaceComposerClient.h
+++ b/include/surfaceflinger/SurfaceComposerClient.h
@@ -22,8 +22,9 @@
 
 #include <binder/IBinder.h>
 
-#include <utils/SortedVector.h>
 #include <utils/RefBase.h>
+#include <utils/Singleton.h>
+#include <utils/SortedVector.h>
 #include <utils/threads.h>
 
 #include <ui/PixelFormat.h>
@@ -39,6 +40,22 @@
 class SharedClient;
 class ISurfaceComposer;
 class DisplayInfo;
+class surface_flinger_cblk_t;
+
+// ---------------------------------------------------------------------------
+
+class ComposerService : public Singleton<ComposerService>
+{
+    // these are constants
+    sp<ISurfaceComposer> mComposerService;
+    sp<IMemoryHeap> mServerCblkMemory;
+    surface_flinger_cblk_t volatile* mServerCblk;
+    ComposerService();
+    friend class Singleton<ComposerService>;
+public:
+    static sp<ISurfaceComposer> getComposerService();
+    static surface_flinger_cblk_t const volatile * getControlBlock();
+};
 
 // ---------------------------------------------------------------------------
 
@@ -153,25 +170,6 @@
 };
 
 // ---------------------------------------------------------------------------
-
-class SurfaceClient : public RefBase
-{
-    // all these attributes are constants
-    status_t                    mStatus;
-    SharedClient*               mControl;
-    sp<IMemoryHeap>             mControlMemory;
-    sp<IBinder>                 mConnection;
-    sp<ISurfaceComposer>        mComposerService;
-    void init(const sp<IBinder>& conn);
-public:
-    explicit SurfaceClient(const sp<IBinder>& conn);
-    explicit SurfaceClient(const sp<SurfaceComposerClient>& client);
-    status_t initCheck() const;
-    SharedClient* getSharedClient() const;
-    void signalServer() const;
-};
-
-// ---------------------------------------------------------------------------
 }; // namespace android
 
 #endif // ANDROID_SF_SURFACE_COMPOSER_CLIENT_H
diff --git a/include/ui/GraphicBuffer.h b/include/ui/GraphicBuffer.h
index e72b6b3..a3e85a9 100644
--- a/include/ui/GraphicBuffer.h
+++ b/include/ui/GraphicBuffer.h
@@ -93,10 +93,8 @@
     
     void setIndex(int index);
     int getIndex() const;
-    void setVerticalStride(uint32_t vstride);
-    uint32_t getVerticalStride() const;
 
-protected:
+private:
     virtual ~GraphicBuffer();
 
     enum {
@@ -105,8 +103,12 @@
         ownData   = 2,
     };
 
-    inline const GraphicBufferMapper& getBufferMapper() const { return mBufferMapper; }
-    inline GraphicBufferMapper& getBufferMapper() { return mBufferMapper; }
+    inline const GraphicBufferMapper& getBufferMapper() const {
+        return mBufferMapper;
+    }
+    inline GraphicBufferMapper& getBufferMapper() {
+        return mBufferMapper;
+    }
     uint8_t mOwner;
 
 private:
@@ -134,7 +136,6 @@
 
     GraphicBufferMapper& mBufferMapper;
     ssize_t mInitCheck;
-    uint32_t mVStride;
     int mIndex;
 };