diff --git a/camera/libcameraservice/CameraService.cpp b/camera/libcameraservice/CameraService.cpp
index 8279914..b63e97f 100644
--- a/camera/libcameraservice/CameraService.cpp
+++ b/camera/libcameraservice/CameraService.cpp
@@ -563,7 +563,19 @@
     status_t ret = NO_ERROR;
     if (mSurface != 0) {
         if (mOverlayRef.get() == NULL) {
-            mOverlayRef = mSurface->createOverlay(w, h, OVERLAY_FORMAT_DEFAULT);
+
+            // FIXME:
+            // Surfaceflinger may hold onto the previous overlay reference for some
+            // time after we try to destroy it. retry a few times. In the future, we
+            // should make the destroy call block, or possibly specify that we can
+            // wait in the createOverlay call if the previous overlay is in the 
+            // process of being destroyed.
+            for (int retry = 0; retry < 50; ++retry) {
+                mOverlayRef = mSurface->createOverlay(w, h, OVERLAY_FORMAT_DEFAULT);
+                if (mOverlayRef != NULL) break;
+                LOGD("Overlay create failed - retrying");
+                usleep(20000);
+            }
             if ( mOverlayRef.get() == NULL )
             {
                 LOGE("Overlay Creation Failed!");
diff --git a/include/private/ui/SharedBufferStack.h b/include/private/ui/SharedBufferStack.h
index 59cf31c..bbc1822 100644
--- a/include/private/ui/SharedBufferStack.h
+++ b/include/private/ui/SharedBufferStack.h
@@ -139,7 +139,8 @@
 class SharedBufferBase
 {
 public:
-    SharedBufferBase(SharedClient* sharedClient, int surface, int num);
+    SharedBufferBase(SharedClient* sharedClient, int surface, int num,
+            int32_t identity);
     ~SharedBufferBase();
     uint32_t getIdentity();
     status_t getStatus() const;
@@ -150,6 +151,7 @@
     SharedClient* const mSharedClient;
     SharedBufferStack* const mSharedStack;
     const int mNumBuffers;
+    const int mIdentity;
 
     friend struct Update;
     friend struct QueueUpdate;
@@ -180,7 +182,10 @@
     SharedClient& client( *mSharedClient );
     const nsecs_t TIMEOUT = s2ns(1);
     Mutex::Autolock _l(client.lock);
-    while ((condition()==false) && (stack.status == NO_ERROR)) {
+    while ((condition()==false) &&
+            (stack.identity == mIdentity) &&
+            (stack.status == NO_ERROR))
+    {
         status_t err = client.cv.waitRelative(client.lock, TIMEOUT);
         
         // handle errors and timeouts
@@ -190,13 +195,13 @@
                     LOGE("waitForCondition(%s) timed out (identity=%d), "
                         "but condition is true! We recovered but it "
                         "shouldn't happen." , T::name(),
-                        mSharedStack->identity);
+                        stack.identity);
                     break;
                 } else {
                     LOGW("waitForCondition(%s) timed out "
                         "(identity=%d, status=%d). "
                         "CPU may be pegged. trying again.", T::name(),
-                        mSharedStack->identity, mSharedStack->status);
+                        stack.identity, stack.status);
                 }
             } else {
                 LOGE("waitForCondition(%s) error (%s) ",
@@ -205,7 +210,7 @@
             }
         }
     }
-    return stack.status;
+    return (stack.identity != mIdentity) ? status_t(BAD_INDEX) : stack.status;
 }
 
 
@@ -223,8 +228,9 @@
 class SharedBufferClient : public SharedBufferBase
 {
 public:
-    SharedBufferClient(SharedClient* sharedClient, int surface, int num);
-    
+    SharedBufferClient(SharedClient* sharedClient, int surface, int num,
+            int32_t identity);
+
     ssize_t dequeue();
     status_t undoDequeue(int buf);
     
@@ -283,6 +289,7 @@
     void setStatus(status_t status);
     status_t reallocate();
     status_t assertReallocate(int buffer);
+    int32_t getQueuedCount() const;
     
     Region getDirtyRegion(int buffer) const;
 
diff --git a/include/private/ui/SurfaceBuffer.h b/include/private/ui/SurfaceBuffer.h
deleted file mode 100644
index 73e517b..0000000
--- a/include/private/ui/SurfaceBuffer.h
+++ /dev/null
@@ -1,81 +0,0 @@
-/*
- * Copyright (C) 2007 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_UI_PRIVATE_SURFACE_BUFFER_H
-#define ANDROID_UI_PRIVATE_SURFACE_BUFFER_H
-
-#include <stdint.h>
-#include <sys/types.h>
-
-#include <utils/RefBase.h>
-
-#include <private/ui/android_natives_priv.h>
-
-namespace android {
-
-// ---------------------------------------------------------------------------
-
-class BufferMapper;
-class Parcel;
-class Rect;
-class Surface;
-class SurfaceBuffer;
-
-// ---------------------------------------------------------------------------
-
-class SurfaceBuffer 
-    : public EGLNativeBase<
-        android_native_buffer_t, 
-        SurfaceBuffer, 
-        LightRefBase<SurfaceBuffer> >
-{
-public:
-    status_t lock(uint32_t usage, void** vaddr);
-    status_t lock(uint32_t usage, const Rect& rect, void** vaddr);
-    status_t unlock();
-
-    void setIndex(int index);
-    int getIndex() const;
-    
-protected:
-            SurfaceBuffer();
-            SurfaceBuffer(const Parcel& reply);
-    virtual ~SurfaceBuffer();
-    bool mOwner;
-
-    inline const BufferMapper& getBufferMapper() const { return mBufferMapper; }
-    inline BufferMapper& getBufferMapper() { return mBufferMapper; }
-    
-private:
-    friend class Surface;
-    friend class BpSurface;
-    friend class BnSurface;
-    friend class LightRefBase<SurfaceBuffer>;    
-
-    SurfaceBuffer& operator = (const SurfaceBuffer& rhs);
-    const SurfaceBuffer& operator = (const SurfaceBuffer& rhs) const;
-
-    static status_t writeToParcel(Parcel* reply, 
-            android_native_buffer_t const* buffer);
-    
-    BufferMapper& mBufferMapper;
-    int mIndex;
-};
-
-}; // namespace android
-
-#endif // ANDROID_UI_PRIVATE_SURFACE_BUFFER_H
-
diff --git a/include/private/ui/SurfaceFlingerSynchro.h b/include/private/ui/SurfaceFlingerSynchro.h
deleted file mode 100644
index 7386d33..0000000
--- a/include/private/ui/SurfaceFlingerSynchro.h
+++ /dev/null
@@ -1,48 +0,0 @@
-/*
- * Copyright (C) 2008 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_SURFACE_FLINGER_SYNCHRO_H
-#define ANDROID_SURFACE_FLINGER_SYNCHRO_H
-
-#include <stdint.h>
-#include <sys/types.h>
-#include <utils/Errors.h>
-#include <ui/ISurfaceComposer.h>
-
-namespace android {
-
-class SurfaceFlinger;
-
-class SurfaceFlingerSynchro
-{
-public:
-                // client constructor
-                SurfaceFlingerSynchro(const sp<ISurfaceComposer>& flinger);
-                ~SurfaceFlingerSynchro();
-    
-                // signal surfaceflinger for some work
-    status_t    signal();
-    
-private:
-    friend class SurfaceFlinger;
-    sp<ISurfaceComposer> mSurfaceComposer;
-};
-
-}; // namespace android
-
-#endif // ANDROID_SURFACE_FLINGER_SYNCHRO_H
-
diff --git a/include/private/ui/android_natives_priv.h b/include/private/ui/android_natives_priv.h
index 9c92af8..6b9f524 100644
--- a/include/private/ui/android_natives_priv.h
+++ b/include/private/ui/android_natives_priv.h
@@ -14,49 +14,4 @@
  * limitations under the License.
  */
 
-#ifndef ANDROID_ANDROID_NATIVES_PRIV_H
-#define ANDROID_ANDROID_NATIVES_PRIV_H
-
-#include <ui/egl/android_natives.h>
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-/*****************************************************************************/
-
-typedef struct android_native_buffer_t
-{
-#ifdef __cplusplus
-    android_native_buffer_t() { 
-        common.magic = ANDROID_NATIVE_BUFFER_MAGIC;
-        common.version = sizeof(android_native_buffer_t);
-        memset(common.reserved, 0, sizeof(common.reserved));
-    }
-#endif
-
-    struct android_native_base_t common;
-
-    int width;
-    int height;
-    int stride;
-    int format;
-    int usage;
-    
-    void* reserved[2];
-
-    buffer_handle_t handle;
-
-    void* reserved_proc[8];
-} android_native_buffer_t;
-
-
-/*****************************************************************************/
-
-#ifdef __cplusplus
-}
-#endif
-
-/*****************************************************************************/
-
-#endif /* ANDROID_ANDROID_NATIVES_PRIV_H */
+#include <ui/android_native_buffer.h>
diff --git a/include/private/ui/sw_gralloc_handle.h b/include/private/ui/sw_gralloc_handle.h
new file mode 100644
index 0000000..b3d333e
--- /dev/null
+++ b/include/private/ui/sw_gralloc_handle.h
@@ -0,0 +1,83 @@
+/*
+ * Copyright (C) 2008 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_UI_PRIVATE_SW_GRALLOC_HANDLE_H
+#define ANDROID_UI_PRIVATE_SW_GRALLOC_HANDLE_H
+
+#include <stdint.h>
+#include <limits.h>
+#include <sys/cdefs.h>
+#include <hardware/gralloc.h>
+#include <errno.h>
+
+#include <cutils/native_handle.h>
+
+namespace android {
+
+/*****************************************************************************/
+
+struct sw_gralloc_handle_t : public native_handle 
+{
+    // file-descriptors
+    int     fd;
+    // ints
+    int     magic;
+    int     size;
+    int     base;
+    int     prot;
+    int     pid;
+
+    static const int sNumInts = 5;
+    static const int sNumFds = 1;
+    static const int sMagic = '_sgh';
+
+    sw_gralloc_handle_t() :
+        fd(-1), magic(sMagic), size(0), base(0), prot(0), pid(getpid())
+    {
+        version = sizeof(native_handle);
+        numInts = sNumInts;
+        numFds = sNumFds;
+    }
+    ~sw_gralloc_handle_t() {
+        magic = 0;
+    }
+
+    static int validate(const native_handle* h) {
+        const sw_gralloc_handle_t* hnd = (const sw_gralloc_handle_t*)h;
+        if (!h || h->version != sizeof(native_handle) ||
+                h->numInts != sNumInts || h->numFds != sNumFds ||
+                hnd->magic != sMagic) 
+        {
+            return -EINVAL;
+        }
+        return 0;
+    }
+
+    static status_t alloc(uint32_t w, uint32_t h, int format,
+            int usage, buffer_handle_t* handle, int32_t* stride);
+    static status_t free(sw_gralloc_handle_t* hnd);
+    static status_t registerBuffer(sw_gralloc_handle_t* hnd);
+    static status_t unregisterBuffer(sw_gralloc_handle_t* hnd);
+    static status_t lock(sw_gralloc_handle_t* hnd, int usage,
+            int l, int t, int w, int h, void** vaddr);
+    static status_t unlock(sw_gralloc_handle_t* hnd);
+};
+
+/*****************************************************************************/
+
+}; // namespace android
+
+#endif /* ANDROID_UI_PRIVATE_SW_GRALLOC_HANDLE_H */
diff --git a/include/ui/GraphicBuffer.h b/include/ui/GraphicBuffer.h
new file mode 100644
index 0000000..8897f03
--- /dev/null
+++ b/include/ui/GraphicBuffer.h
@@ -0,0 +1,124 @@
+/*
+ * Copyright (C) 2007 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_GRAPHIC_BUFFER_H
+#define ANDROID_GRAPHIC_BUFFER_H
+
+#include <stdint.h>
+#include <sys/types.h>
+
+#include <ui/android_native_buffer.h>
+#include <ui/PixelFormat.h>
+#include <ui/Rect.h>
+#include <pixelflinger/pixelflinger.h>
+
+struct android_native_buffer_t;
+
+namespace android {
+
+class GraphicBufferMapper;
+class Parcel;
+
+// ===========================================================================
+// GraphicBuffer
+// ===========================================================================
+
+class GraphicBuffer
+    : public EGLNativeBase<
+        android_native_buffer_t, 
+        GraphicBuffer, 
+        LightRefBase<GraphicBuffer> >
+{
+public:
+
+    enum {
+        USAGE_SW_READ_NEVER     = GRALLOC_USAGE_SW_READ_NEVER,
+        USAGE_SW_READ_RARELY    = GRALLOC_USAGE_SW_READ_RARELY,
+        USAGE_SW_READ_OFTEN     = GRALLOC_USAGE_SW_READ_OFTEN,
+        USAGE_SW_READ_MASK      = GRALLOC_USAGE_SW_READ_MASK,
+        
+        USAGE_SW_WRITE_NEVER    = GRALLOC_USAGE_SW_WRITE_NEVER,
+        USAGE_SW_WRITE_RARELY   = GRALLOC_USAGE_SW_WRITE_RARELY,
+        USAGE_SW_WRITE_OFTEN    = GRALLOC_USAGE_SW_WRITE_OFTEN,
+        USAGE_SW_WRITE_MASK     = GRALLOC_USAGE_SW_WRITE_MASK,
+        
+        USAGE_SOFTWARE_MASK     = USAGE_SW_READ_MASK|USAGE_SW_WRITE_MASK,
+        
+        USAGE_HW_TEXTURE        = GRALLOC_USAGE_HW_TEXTURE,
+        USAGE_HW_RENDER         = GRALLOC_USAGE_HW_RENDER,
+        USAGE_HW_2D             = GRALLOC_USAGE_HW_2D,
+        USAGE_HW_MASK           = GRALLOC_USAGE_HW_MASK
+    };
+
+    GraphicBuffer();
+
+    // creates w * h buffer
+    GraphicBuffer(uint32_t w, uint32_t h, PixelFormat format, uint32_t ssage);
+
+    // return status
+    status_t initCheck() const;
+
+    uint32_t getWidth() const           { return width; }
+    uint32_t getHeight() const          { return height; }
+    uint32_t getStride() const          { return stride; }
+    uint32_t getUsage() const           { return usage; }
+    PixelFormat getPixelFormat() const  { return format; }
+    Rect getBounds() const              { return Rect(width, height); }
+    
+    status_t reallocate(uint32_t w, uint32_t h, PixelFormat f, uint32_t usage);
+
+    status_t lock(uint32_t usage, void** vaddr);
+    status_t lock(uint32_t usage, const Rect& rect, void** vaddr);
+    status_t lock(GGLSurface* surface, uint32_t usage);
+    status_t unlock();
+    
+    android_native_buffer_t* getNativeBuffer() const;
+    
+    void setIndex(int index);
+    int getIndex() const;
+
+protected:
+    GraphicBuffer(const Parcel& reply);
+    virtual ~GraphicBuffer();
+
+    inline const GraphicBufferMapper& getBufferMapper() const { return mBufferMapper; }
+    inline GraphicBufferMapper& getBufferMapper() { return mBufferMapper; }
+    bool mOwner;
+
+private:
+    friend class Surface;
+    friend class BpSurface;
+    friend class BnSurface;
+    friend class LightRefBase<GraphicBuffer>;
+    GraphicBuffer(const GraphicBuffer& rhs);
+    GraphicBuffer& operator = (const GraphicBuffer& rhs);
+    const GraphicBuffer& operator = (const GraphicBuffer& rhs) const;
+
+    status_t initSize(uint32_t w, uint32_t h, PixelFormat format, 
+            uint32_t usage);
+
+    static status_t writeToParcel(Parcel* reply, 
+            android_native_buffer_t const* buffer);
+
+    GraphicBufferMapper& mBufferMapper;
+    ssize_t mInitCheck;
+    uint32_t mVStride;
+    int mIndex;
+};
+
+}; // namespace android
+
+#endif // ANDROID_GRAPHIC_BUFFER_H
diff --git a/libs/surfaceflinger/BufferAllocator.h b/include/ui/GraphicBufferAllocator.h
similarity index 90%
rename from libs/surfaceflinger/BufferAllocator.h
rename to include/ui/GraphicBufferAllocator.h
index a279ded..be9c79b 100644
--- a/libs/surfaceflinger/BufferAllocator.h
+++ b/include/ui/GraphicBufferAllocator.h
@@ -37,7 +37,7 @@
 
 class String8;
 
-class BufferAllocator : public Singleton<BufferAllocator>
+class GraphicBufferAllocator : public Singleton<GraphicBufferAllocator>
 {
 public:
     enum {
@@ -59,7 +59,7 @@
         USAGE_HW_MASK           = GRALLOC_USAGE_HW_MASK
     };
 
-    static inline BufferAllocator& get() { return getInstance(); }
+    static inline GraphicBufferAllocator& get() { return getInstance(); }
     
 
     status_t alloc(uint32_t w, uint32_t h, PixelFormat format, int usage,
@@ -82,9 +82,9 @@
     static Mutex sLock;
     static KeyedVector<buffer_handle_t, alloc_rec_t> sAllocList;
     
-    friend class Singleton<BufferAllocator>;
-    BufferAllocator();
-    ~BufferAllocator();
+    friend class Singleton<GraphicBufferAllocator>;
+    GraphicBufferAllocator();
+    ~GraphicBufferAllocator();
     
     mutable Mutex mLock;
     alloc_device_t  *mAllocDev;
diff --git a/include/ui/BufferMapper.h b/include/ui/GraphicBufferMapper.h
similarity index 87%
rename from include/ui/BufferMapper.h
rename to include/ui/GraphicBufferMapper.h
index 5f084be..697a02a 100644
--- a/include/ui/BufferMapper.h
+++ b/include/ui/GraphicBufferMapper.h
@@ -33,10 +33,10 @@
 
 class Rect;
 
-class BufferMapper : public Singleton<BufferMapper>
+class GraphicBufferMapper : public Singleton<GraphicBufferMapper>
 {
 public:
-    static inline BufferMapper& get() { return getInstance(); }
+    static inline GraphicBufferMapper& get() { return getInstance(); }
 
     status_t registerBuffer(buffer_handle_t handle);
 
@@ -51,8 +51,8 @@
     void dump(buffer_handle_t handle);
 
 private:
-    friend class Singleton<BufferMapper>;
-    BufferMapper();
+    friend class Singleton<GraphicBufferMapper>;
+    GraphicBufferMapper();
     gralloc_module_t const *mAllocMod;
 };
 
diff --git a/include/ui/ISurface.h b/include/ui/ISurface.h
index 1283033..2ca0026 100644
--- a/include/ui/ISurface.h
+++ b/include/ui/ISurface.h
@@ -34,7 +34,7 @@
 
 class IMemoryHeap;
 class OverlayRef;
-class SurfaceBuffer;
+class GraphicBuffer;
 
 class ISurface : public IInterface
 {
@@ -50,7 +50,7 @@
 public: 
     DECLARE_META_INTERFACE(Surface);
 
-    virtual sp<SurfaceBuffer> requestBuffer(int bufferIdx, int usage) = 0; 
+    virtual sp<GraphicBuffer> requestBuffer(int bufferIdx, int usage) = 0; 
     
     class BufferHeap {
     public:
diff --git a/include/ui/Surface.h b/include/ui/Surface.h
index 2cedeb6..70303cd 100644
--- a/include/ui/Surface.h
+++ b/include/ui/Surface.h
@@ -34,7 +34,7 @@
 
 // ---------------------------------------------------------------------------
 
-class BufferMapper;
+class GraphicBufferMapper;
 class IOMX;
 class Rect;
 class Surface;
@@ -192,8 +192,8 @@
    
            status_t validate(SharedClient const* cblk) const;
 
-    inline const BufferMapper& getBufferMapper() const { return mBufferMapper; }
-    inline BufferMapper& getBufferMapper() { return mBufferMapper; }
+    inline const GraphicBufferMapper& getBufferMapper() const { return mBufferMapper; }
+    inline GraphicBufferMapper& getBufferMapper() { return mBufferMapper; }
     
     static int setSwapInterval(android_native_window_t* window, int interval);
     static int dequeueBuffer(android_native_window_t* window, android_native_buffer_t** buffer);
@@ -208,7 +208,7 @@
     int query(int what, int* value);
     int perform(int operation, va_list args);
 
-    status_t dequeueBuffer(sp<SurfaceBuffer>* buffer);
+    status_t dequeueBuffer(sp<GraphicBuffer>* buffer);
 
     
     void setUsage(uint32_t reqUsage);
@@ -221,7 +221,7 @@
     uint32_t                    mIdentity;
     PixelFormat                 mFormat;
     uint32_t                    mFlags;
-    BufferMapper&               mBufferMapper;
+    GraphicBufferMapper&        mBufferMapper;
     SharedBufferClient*         mSharedBufferClient;
 
     // protected by mSurfaceLock
@@ -230,12 +230,12 @@
     
     // protected by mSurfaceLock. These are also used from lock/unlock
     // but in that case, they must be called form the same thread.
-    sp<SurfaceBuffer>           mBuffers[2];
+    sp<GraphicBuffer>           mBuffers[2];
     mutable Region              mDirtyRegion;
 
     // must be used from the lock/unlock thread
-    sp<SurfaceBuffer>           mLockedBuffer;
-    sp<SurfaceBuffer>           mPostedBuffer;
+    sp<GraphicBuffer>           mLockedBuffer;
+    sp<GraphicBuffer>           mPostedBuffer;
     mutable Region              mOldDirtyRegion;
     bool                        mNeedFullUpdate;
 
diff --git a/include/ui/SurfaceComposerClient.h b/include/ui/SurfaceComposerClient.h
index 8701928..777b878 100644
--- a/include/ui/SurfaceComposerClient.h
+++ b/include/ui/SurfaceComposerClient.h
@@ -153,7 +153,7 @@
                 SharedClient*               mControl;
                 sp<IMemoryHeap>             mControlMemory;
                 sp<ISurfaceFlingerClient>   mClient;
-                SurfaceFlingerSynchro*      mSignalServer;
+                sp<ISurfaceComposer>        mSignalServer;
 };
 
 }; // namespace android
diff --git a/include/ui/android_native_buffer.h b/include/ui/android_native_buffer.h
new file mode 100644
index 0000000..9c92af8
--- /dev/null
+++ b/include/ui/android_native_buffer.h
@@ -0,0 +1,62 @@
+/*
+ * Copyright (C) 2009 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_ANDROID_NATIVES_PRIV_H
+#define ANDROID_ANDROID_NATIVES_PRIV_H
+
+#include <ui/egl/android_natives.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/*****************************************************************************/
+
+typedef struct android_native_buffer_t
+{
+#ifdef __cplusplus
+    android_native_buffer_t() { 
+        common.magic = ANDROID_NATIVE_BUFFER_MAGIC;
+        common.version = sizeof(android_native_buffer_t);
+        memset(common.reserved, 0, sizeof(common.reserved));
+    }
+#endif
+
+    struct android_native_base_t common;
+
+    int width;
+    int height;
+    int stride;
+    int format;
+    int usage;
+    
+    void* reserved[2];
+
+    buffer_handle_t handle;
+
+    void* reserved_proc[8];
+} android_native_buffer_t;
+
+
+/*****************************************************************************/
+
+#ifdef __cplusplus
+}
+#endif
+
+/*****************************************************************************/
+
+#endif /* ANDROID_ANDROID_NATIVES_PRIV_H */
diff --git a/libs/audioflinger/A2dpAudioInterface.cpp b/libs/audioflinger/A2dpAudioInterface.cpp
index 57a29f2..351815b 100644
--- a/libs/audioflinger/A2dpAudioInterface.cpp
+++ b/libs/audioflinger/A2dpAudioInterface.cpp
@@ -16,7 +16,7 @@
 
 #include <math.h>
 
-#define LOG_NDEBUG 0
+//#define LOG_NDEBUG 0
 #define LOG_TAG "A2dpAudioInterface"
 #include <utils/Log.h>
 #include <utils/String8.h>
@@ -40,7 +40,7 @@
 //}
 
 A2dpAudioInterface::A2dpAudioInterface(AudioHardwareInterface* hw) :
-    mOutput(0), mHardwareInterface(hw), mBluetoothEnabled(true)
+    mOutput(0), mHardwareInterface(hw), mBluetoothEnabled(true), mSuspended(false)
 {
 }
 
@@ -78,6 +78,7 @@
     if ((err = out->set(devices, format, channels, sampleRate)) == NO_ERROR) {
         mOutput = out;
         mOutput->setBluetoothEnabled(mBluetoothEnabled);
+        mOutput->setSuspended(mSuspended);
     } else {
         delete out;
     }
@@ -142,6 +143,14 @@
         }
         param.remove(key);
     }
+    key = String8("A2dpSuspended");
+    if (param.get(key, value) == NO_ERROR) {
+        mSuspended = (value == "true");
+        if (mOutput) {
+            mOutput->setSuspended(mSuspended);
+        }
+        param.remove(key);
+    }
 
     if (param.size()) {
         status_t hwStatus = mHardwareInterface->setParameters(param.toString());
@@ -166,6 +175,12 @@
         a2dpParam.add(key, value);
         param.remove(key);
     }
+    key = "A2dpSuspended";
+    if (param.get(key, value) == NO_ERROR) {
+        value = mSuspended ? "true" : "false";
+        a2dpParam.add(key, value);
+        param.remove(key);
+    }
 
     String8 keyValuePairs  = a2dpParam.toString();
 
@@ -204,7 +219,7 @@
     mFd(-1), mStandby(true), mStartCount(0), mRetryCount(0), mData(NULL),
     // assume BT enabled to start, this is safe because its only the
     // enabled->disabled transition we are worried about
-    mBluetoothEnabled(true), mDevice(0), mClosing(false)
+    mBluetoothEnabled(true), mDevice(0), mClosing(false), mSuspended(false)
 {
     // use any address by default
     strcpy(mA2dpAddress, "00:00:00:00:00:00");
@@ -258,8 +273,10 @@
     size_t remaining = bytes;
     status_t status = -1;
 
-    if (!mBluetoothEnabled || mClosing) {
-        LOGW("A2dpAudioStreamOut::write(), but bluetooth disabled");
+    if (!mBluetoothEnabled || mClosing || mSuspended) {
+        LOGV("A2dpAudioStreamOut::write(), but bluetooth disabled \
+               mBluetoothEnabled %d, mClosing %d, mSuspended %d",
+                mBluetoothEnabled, mClosing, mSuspended);
         goto Error;
     }
 
@@ -408,6 +425,14 @@
     return NO_ERROR;
 }
 
+status_t A2dpAudioInterface::A2dpAudioStreamOut::setSuspended(bool onOff)
+{
+    LOGV("setSuspended %d", onOff);
+    mSuspended = onOff;
+    standby();
+    return NO_ERROR;
+}
+
 status_t A2dpAudioInterface::A2dpAudioStreamOut::close()
 {
     Mutex::Autolock lock(mLock);
diff --git a/libs/audioflinger/A2dpAudioInterface.h b/libs/audioflinger/A2dpAudioInterface.h
index 35a6e11..530e432 100644
--- a/libs/audioflinger/A2dpAudioInterface.h
+++ b/libs/audioflinger/A2dpAudioInterface.h
@@ -101,6 +101,7 @@
                 status_t    close_l();
                 status_t    setAddress(const char* address);
                 status_t    setBluetoothEnabled(bool enabled);
+                status_t    setSuspended(bool onOff);
 
     private:
                 int         mFd;
@@ -113,6 +114,7 @@
                 bool        mBluetoothEnabled;
                 uint32_t    mDevice;
                 bool        mClosing;
+                bool        mSuspended;
     };
 
     friend class A2dpAudioStreamOut;
@@ -121,6 +123,7 @@
     AudioHardwareInterface  *mHardwareInterface;
     char        mA2dpAddress[20];
     bool        mBluetoothEnabled;
+    bool        mSuspended;
 };
 
 
diff --git a/libs/audioflinger/AudioFlinger.cpp b/libs/audioflinger/AudioFlinger.cpp
index 8e967fb..ba8b322 100644
--- a/libs/audioflinger/AudioFlinger.cpp
+++ b/libs/audioflinger/AudioFlinger.cpp
@@ -62,8 +62,6 @@
 static const char* kHardwareLockedString = "Hardware lock is taken\n";
 
 //static const nsecs_t kStandbyTimeInNsecs = seconds(3);
-static const unsigned long kBufferRecoveryInUsecs = 2000;
-static const unsigned long kMaxBufferRecoveryInUsecs = 20000;
 static const float MAX_GAIN = 4096.0f;
 
 // retry counts for buffer fill timeout
@@ -1070,10 +1068,10 @@
     // in both cases "unstop" the track
     if (track->isPaused()) {
         track->mState = TrackBase::RESUMING;
-        LOGV("PAUSED => RESUMING (%d)", track->name());
+        LOGV("PAUSED => RESUMING (%d) on thread %p", track->name(), this);
     } else {
         track->mState = TrackBase::ACTIVE;
-        LOGV("? => ACTIVE (%d)", track->name());
+        LOGV("? => ACTIVE (%d) on thread %p", track->name(), this);
     }
     // set retry count for buffer fill
     track->mRetryCount = kMaxTrackStartupRetries;
@@ -1175,7 +1173,8 @@
 
 bool AudioFlinger::MixerThread::threadLoop()
 {
-    unsigned long sleepTime = 0;
+    uint32_t sleepTime = 0;
+    uint32_t maxBufferRecoveryInUsecs = getMaxBufferRecoveryInUsecs();
     int16_t* curBuf = mMixBuffer;
     Vector< sp<Track> > tracksToRemove;
     size_t enabledTracks = 0;
@@ -1200,6 +1199,7 @@
                 // FIXME: Relaxed timing because of a certain device that can't meet latency
                 // Should be reduced to 2x after the vendor fixes the driver issue
                 maxPeriod = seconds(mFrameCount) / mSampleRate * 3;
+                maxBufferRecoveryInUsecs = getMaxBufferRecoveryInUsecs();
             }
 
             const SortedVector< wp<Track> >& activeTracks = mActiveTracks;
@@ -1235,7 +1235,6 @@
                     }
 
                     standbyTime = systemTime() + kStandbyTimeInNsecs;
-                    sleepTime = 0;
                     continue;
                 }
             }
@@ -1249,28 +1248,23 @@
             sleepTime = 0;
             standbyTime = systemTime() + kStandbyTimeInNsecs;
         } else {
-            sleepTime += kBufferRecoveryInUsecs;
-            if (sleepTime > kMaxBufferRecoveryInUsecs) {
-                sleepTime = kMaxBufferRecoveryInUsecs;
-            }
-            // There was nothing to mix this round, which means all
-            // active tracks were late. Sleep a little bit to give
-            // them another chance. If we're too late, write 0s to audio
-            // hardware to avoid underrun.
-            if (mBytesWritten != 0 && sleepTime >= kMaxBufferRecoveryInUsecs) {
+            // If no tracks are ready, sleep once for the duration of an output
+            // buffer size, then write 0s to the output
+            if (sleepTime == 0) {
+                sleepTime = maxBufferRecoveryInUsecs;
+            } else if (mBytesWritten != 0) {
                 memset (curBuf, 0, mixBufferSize);
                 sleepTime = 0;
             }
         }
 
         if (mSuspended) {
-            sleepTime = kMaxBufferRecoveryInUsecs;
+            sleepTime = maxBufferRecoveryInUsecs;
         }
         // sleepTime == 0 means we must write to audio hardware
         if (sleepTime == 0) {
             mLastWriteTime = systemTime();
             mInWrite = true;
-            LOGV("mOutput->write() thread %p frames %d", this, mFrameCount);
             int bytesWritten = (int)mOutput->write(curBuf, mixBufferSize);
             if (bytesWritten > 0) mBytesWritten += bytesWritten;
             mNumWrites++;
@@ -1393,7 +1387,7 @@
                 // No buffers for this track. Give it a few chances to
                 // fill a buffer, then remove it from active list.
                 if (--(track->mRetryCount) <= 0) {
-                    LOGV("BUFFER TIMEOUT: remove(%d) from active list", track->name());
+                    LOGV("BUFFER TIMEOUT: remove(%d) from active list on thread %p", track->name(), this);
                     tracksToRemove->add(track);
                 }
                 // For tracks using static shared memory buffer, make sure that we have
@@ -1583,6 +1577,16 @@
     return NO_ERROR;
 }
 
+uint32_t AudioFlinger::MixerThread::getMaxBufferRecoveryInUsecs()
+{
+    uint32_t time = ((mFrameCount * 1000) / mSampleRate) * 1000;
+    // Add some margin with regard to scheduling precision
+    if (time > 10000) {
+        time -= 10000;
+    }
+    return time;
+}
+
 // ----------------------------------------------------------------------------
 AudioFlinger::DirectOutputThread::DirectOutputThread(const sp<AudioFlinger>& audioFlinger, AudioStreamOut* output)
     :   PlaybackThread(audioFlinger, output),
@@ -1598,7 +1602,8 @@
 
 bool AudioFlinger::DirectOutputThread::threadLoop()
 {
-    unsigned long sleepTime = 0;
+    uint32_t sleepTime = 0;
+    uint32_t maxBufferRecoveryInUsecs = getMaxBufferRecoveryInUsecs();
     sp<Track> trackToRemove;
     sp<Track> activeTrack;
     nsecs_t standbyTime = systemTime();
@@ -1615,6 +1620,7 @@
 
             if (checkForNewParameters_l()) {
                 mixBufferSize = mFrameCount*mFrameSize;
+                maxBufferRecoveryInUsecs = getMaxBufferRecoveryInUsecs();
             }
 
             // put audio hardware into standby after short delay
@@ -1648,7 +1654,6 @@
                     }
 
                     standbyTime = systemTime() + kStandbyTimeInNsecs;
-                    sleepTime = 0;
                     continue;
                 }
             }
@@ -1761,23 +1766,16 @@
             sleepTime = 0;
             standbyTime = systemTime() + kStandbyTimeInNsecs;
         } else {
-            sleepTime += kBufferRecoveryInUsecs;
-            if (sleepTime > kMaxBufferRecoveryInUsecs) {
-                sleepTime = kMaxBufferRecoveryInUsecs;
-            }
-            // There was nothing to mix this round, which means all
-            // active tracks were late. Sleep a little bit to give
-            // them another chance. If we're too late, write 0s to audio
-            // hardware to avoid underrun.
-            if (mBytesWritten != 0 && sleepTime >= kMaxBufferRecoveryInUsecs &&
-                AudioSystem::isLinearPCM(mFormat)) {
+            if (sleepTime == 0) {
+                sleepTime = maxBufferRecoveryInUsecs;
+            } else if (mBytesWritten != 0 && AudioSystem::isLinearPCM(mFormat)) {
                 memset (mMixBuffer, 0, mFrameCount * mFrameSize);
                 sleepTime = 0;
             }
         }
 
         if (mSuspended) {
-            sleepTime = kMaxBufferRecoveryInUsecs;
+            sleepTime = maxBufferRecoveryInUsecs;
         }
         // sleepTime == 0 means we must write to audio hardware
         if (sleepTime == 0) {
@@ -1861,6 +1859,21 @@
     return reconfig;
 }
 
+uint32_t AudioFlinger::DirectOutputThread::getMaxBufferRecoveryInUsecs()
+{
+    uint32_t time;
+    if (AudioSystem::isLinearPCM(mFormat)) {
+        time = ((mFrameCount * 1000) / mSampleRate) * 1000;
+        // Add some margin with regard to scheduling precision
+        if (time > 10000) {
+            time -= 10000;
+        }
+    } else {
+        time = 10000;
+    }
+    return time;
+}
+
 // ----------------------------------------------------------------------------
 
 AudioFlinger::DuplicatingThread::DuplicatingThread(const sp<AudioFlinger>& audioFlinger, AudioFlinger::MixerThread* mainThread)
@@ -1877,13 +1890,15 @@
 
 bool AudioFlinger::DuplicatingThread::threadLoop()
 {
-    unsigned long sleepTime = kBufferRecoveryInUsecs;
+    uint32_t sleepTime = 0;
+    uint32_t maxBufferRecoveryInUsecs = getMaxBufferRecoveryInUsecs();
     int16_t* curBuf = mMixBuffer;
     Vector< sp<Track> > tracksToRemove;
     size_t enabledTracks = 0;
     nsecs_t standbyTime = systemTime();
     size_t mixBufferSize = mFrameCount*mFrameSize;
     SortedVector< sp<OutputTrack> > outputTracks;
+    uint32_t writeFrames = 0;
 
     while (!exitPending())
     {
@@ -1896,6 +1911,7 @@
 
             if (checkForNewParameters_l()) {
                 mixBufferSize = mFrameCount*mFrameSize;
+                maxBufferRecoveryInUsecs = getMaxBufferRecoveryInUsecs();
             }
 
             const SortedVector< wp<Track> >& activeTracks = mActiveTracks;
@@ -1935,7 +1951,6 @@
                     }
 
                     standbyTime = systemTime() + kStandbyTimeInNsecs;
-                    sleepTime = kBufferRecoveryInUsecs;
                     continue;
                 }
             }
@@ -1947,29 +1962,30 @@
             // mix buffers...
             mAudioMixer->process(curBuf);
             sleepTime = 0;
-            standbyTime = systemTime() + kStandbyTimeInNsecs;
+            writeFrames = mFrameCount;
         } else {
-            sleepTime += kBufferRecoveryInUsecs;
-            if (sleepTime > kMaxBufferRecoveryInUsecs) {
-                sleepTime = kMaxBufferRecoveryInUsecs;
-            }
-            // There was nothing to mix this round, which means all
-            // active tracks were late. Sleep a little bit to give
-            // them another chance. If we're too late, write 0s to audio
-            // hardware to avoid underrun.
-            if (mBytesWritten != 0 && sleepTime >= kMaxBufferRecoveryInUsecs) {
-                memset (curBuf, 0, mixBufferSize);
-                sleepTime = 0;
+            if (sleepTime == 0) {
+                sleepTime = maxBufferRecoveryInUsecs;
+            } else if (mBytesWritten != 0) {
+                // flush remaining overflow buffers in output tracks
+                for (size_t i = 0; i < outputTracks.size(); i++) {
+                    if (outputTracks[i]->isActive()) {
+                        sleepTime = 0;
+                        writeFrames = 0;
+                        break;
+                    }
+                }
             }
         }
 
         if (mSuspended) {
-            sleepTime = kMaxBufferRecoveryInUsecs;
+            sleepTime = maxBufferRecoveryInUsecs;
         }
         // sleepTime == 0 means we must write to audio hardware
         if (sleepTime == 0) {
+            standbyTime = systemTime() + kStandbyTimeInNsecs;
             for (size_t i = 0; i < outputTracks.size(); i++) {
-                outputTracks[i]->write(curBuf, mFrameCount);
+                outputTracks[i]->write(curBuf, writeFrames);
             }
             mStandby = false;
             mBytesWritten += mixBufferSize;
@@ -2026,7 +2042,6 @@
     LOGV("removeOutputTrack(): unkonwn thread: %p", thread);
 }
 
-
 // ----------------------------------------------------------------------------
 
 // TrackBase constructor must be called with AudioFlinger::mLock held
@@ -2300,7 +2315,7 @@
 getNextBuffer_exit:
      buffer->raw = 0;
      buffer->frameCount = 0;
-     LOGV("getNextBuffer() no more data");
+     LOGV("getNextBuffer() no more data for track %d on thread %p", mName, mThread.unsafe_get());
      return NOT_ENOUGH_DATA;
 }
 
@@ -2341,7 +2356,7 @@
             if (playbackThread->mActiveTracks.indexOf(this) < 0) {
                 reset();
             }
-            LOGV("(> STOPPED) => STOPPED (%d)", mName);
+            LOGV("(> STOPPED) => STOPPED (%d) on thread %p", mName, playbackThread);
         }
     }
 }
@@ -2354,7 +2369,7 @@
         Mutex::Autolock _l(thread->mLock);
         if (mState == ACTIVE || mState == RESUMING) {
             mState = PAUSING;
-            LOGV("ACTIVE/RESUMING => PAUSING (%d)", mName);
+            LOGV("ACTIVE/RESUMING => PAUSING (%d) on thread %p", mName, thread.get());
         }
     }
 }
@@ -2566,7 +2581,7 @@
 
     uint32_t waitTimeLeftMs = mWaitTimeMs;
 
-    if (!mActive) {
+    if (!mActive && frames != 0) {
         start();
         sp<ThreadBase> thread = mThread.promote();
         if (thread != 0) {
@@ -2608,7 +2623,7 @@
                 break;
             }
             uint32_t waitTimeMs = (uint32_t)ns2ms(systemTime() - startTime);
-//            LOGV("OutputTrack::write() waitTimeMs %d waitTimeLeftMs %d", waitTimeMs, waitTimeLeftMs)
+            LOGV("OutputTrack::write() to thread %p waitTimeMs %d waitTimeLeftMs %d", mThread.unsafe_get(), waitTimeMs, waitTimeLeftMs);
             if (waitTimeLeftMs >= waitTimeMs) {
                 waitTimeLeftMs -= waitTimeMs;
             } else {
@@ -2663,7 +2678,7 @@
             pInBuffer->i16 = pInBuffer->mBuffer;
             memset(pInBuffer->raw, 0, frames * channels * sizeof(int16_t));
             mBufferQueue.add(pInBuffer);
-        } else {
+        } else if (mActive) {
             stop();
         }
     }
diff --git a/libs/audioflinger/AudioFlinger.h b/libs/audioflinger/AudioFlinger.h
index 3699019..4bf73ce 100644
--- a/libs/audioflinger/AudioFlinger.h
+++ b/libs/audioflinger/AudioFlinger.h
@@ -524,6 +524,10 @@
         bool                            mMasterMute;
         SortedVector< wp<Track> >       mActiveTracks;
 
+        virtual int             getTrackName_l() = 0;
+        virtual void            deleteTrackName_l(int name) = 0;
+        virtual uint32_t        getMaxBufferRecoveryInUsecs() = 0;
+
     private:
 
         friend class AudioFlinger;
@@ -539,8 +543,7 @@
 
         status_t    addTrack_l(const sp<Track>& track);
         void        destroyTrack_l(const sp<Track>& track);
-        virtual int         getTrackName_l() = 0;
-        virtual void        deleteTrackName_l(int name) = 0;
+
         void        readOutputParameters();
 
         virtual status_t    dumpInternals(int fd, const Vector<String16>& args);
@@ -571,13 +574,14 @@
                                       int streamType);
                     void        putTracks(SortedVector < sp<Track> >& tracks,
                                       SortedVector < wp<Track> >& activeTracks);
-        virtual     int         getTrackName_l();
-        virtual     void        deleteTrackName_l(int name);
         virtual     bool        checkForNewParameters_l();
         virtual     status_t    dumpInternals(int fd, const Vector<String16>& args);
 
     protected:
         size_t prepareTracks_l(const SortedVector< wp<Track> >& activeTracks, Vector< sp<Track> > *tracksToRemove);
+        virtual     int         getTrackName_l();
+        virtual     void        deleteTrackName_l(int name);
+        virtual     uint32_t    getMaxBufferRecoveryInUsecs();
 
         AudioMixer*                     mAudioMixer;
     };
@@ -591,9 +595,12 @@
         // Thread virtuals
         virtual     bool        threadLoop();
 
+        virtual     bool        checkForNewParameters_l();
+
+    protected:
         virtual     int         getTrackName_l();
         virtual     void        deleteTrackName_l(int name);
-        virtual     bool        checkForNewParameters_l();
+        virtual     uint32_t    getMaxBufferRecoveryInUsecs();
 
     private:
         float mLeftVolume;
diff --git a/libs/surfaceflinger/Android.mk b/libs/surfaceflinger/Android.mk
index 49da111..eb51c22 100644
--- a/libs/surfaceflinger/Android.mk
+++ b/libs/surfaceflinger/Android.mk
@@ -6,8 +6,6 @@
     DisplayHardware/DisplayHardware.cpp \
     DisplayHardware/DisplayHardwareBase.cpp \
     BlurFilter.cpp.arm \
-    Buffer.cpp \
-    BufferAllocator.cpp \
     Layer.cpp \
     LayerBase.cpp \
     LayerBuffer.cpp \
diff --git a/libs/surfaceflinger/Buffer.cpp b/libs/surfaceflinger/Buffer.cpp
deleted file mode 100644
index 6190cd8..0000000
--- a/libs/surfaceflinger/Buffer.cpp
+++ /dev/null
@@ -1,137 +0,0 @@
-/*
- * Copyright (C) 2007 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.
- */
-
-#include <stdlib.h>
-#include <stdint.h>
-#include <sys/types.h>
-
-#include <utils/Errors.h>
-#include <utils/Log.h>
-
-#include <ui/PixelFormat.h>
-#include <pixelflinger/pixelflinger.h>
-
-#include "Buffer.h"
-#include "BufferAllocator.h"
-
-namespace android {
-
-// ===========================================================================
-// Buffer and implementation of android_native_buffer_t
-// ===========================================================================
-
-Buffer::Buffer()
-    : SurfaceBuffer(), mInitCheck(NO_ERROR),  mVStride(0)
-{
-}
-
-Buffer::Buffer(uint32_t w, uint32_t h, PixelFormat format,
-        uint32_t reqUsage, uint32_t flags)
-    : SurfaceBuffer(), mInitCheck(NO_INIT), mVStride(0)
-{
-    mInitCheck = initSize(w, h, format, reqUsage, flags);
-}
-
-Buffer::~Buffer()
-{
-    if (handle) {
-        BufferAllocator& allocator(BufferAllocator::get());
-        allocator.free(handle);
-    }
-}
-
-status_t Buffer::initCheck() const {
-    return mInitCheck;
-}
-
-android_native_buffer_t* Buffer::getNativeBuffer() const
-{
-    return static_cast<android_native_buffer_t*>(const_cast<Buffer*>(this));
-}
-
-status_t Buffer::reallocate(uint32_t w, uint32_t h, PixelFormat f,
-        uint32_t reqUsage, uint32_t flags)
-{
-    if (handle) {
-        BufferAllocator& allocator(BufferAllocator::get());
-        allocator.free(handle);
-        handle = 0;
-    }
-    return initSize(w, h, f, reqUsage, flags);
-}
-
-status_t Buffer::initSize(uint32_t w, uint32_t h, PixelFormat format,
-        uint32_t reqUsage, uint32_t flags)
-{
-    status_t err = NO_ERROR;
-
-    BufferAllocator& allocator = BufferAllocator::get();
-        
-    /*
-     *  buffers used for software rendering, but h/w composition
-     *  are allocated with SW_READ_OFTEN | SW_WRITE_OFTEN | HW_TEXTURE
-     *  
-     *  buffers used for h/w rendering and h/w composition
-     *  are allocated with  HW_RENDER | HW_TEXTURE
-     *  
-     *  buffers used with h/w rendering and either NPOT or no egl_image_ext
-     *  are allocated with SW_READ_RARELY | HW_RENDER 
-     *  
-     */
-    
-    if (flags & Buffer::SECURE) {
-        // secure buffer, don't store it into the GPU
-        usage = BufferAllocator::USAGE_SW_READ_OFTEN | 
-                BufferAllocator::USAGE_SW_WRITE_OFTEN;
-    } else {
-        // it's allowed to modify the usage flags here, but generally
-        // the requested flags should be honored.
-        usage = reqUsage | BufferAllocator::USAGE_HW_TEXTURE;
-    }
-    
-    if (format == PIXEL_FORMAT_RGBX_8888)
-        format = PIXEL_FORMAT_RGBA_8888;
-
-    err = allocator.alloc(w, h, format, usage, &handle, &stride);
-    if (err == NO_ERROR) {
-        this->width  = w;
-        this->height = h;
-        this->format = format;
-        mVStride = 0;
-    }
-
-    return err;
-}
-
-status_t Buffer::lock(GGLSurface* sur, uint32_t usage) 
-{
-    void* vaddr;
-    status_t res = SurfaceBuffer::lock(usage, &vaddr);
-    if (res == NO_ERROR && sur) {
-        sur->version = sizeof(GGLSurface);
-        sur->width = width;
-        sur->height = height;
-        sur->stride = stride;
-        sur->format = format;
-        sur->vstride = mVStride;
-        sur->data = static_cast<GGLubyte*>(vaddr);
-    }
-    return res;
-}
-
-// ---------------------------------------------------------------------------
-
-}; // namespace android
diff --git a/libs/surfaceflinger/Buffer.h b/libs/surfaceflinger/Buffer.h
deleted file mode 100644
index 203da3b..0000000
--- a/libs/surfaceflinger/Buffer.h
+++ /dev/null
@@ -1,83 +0,0 @@
-/*
- * Copyright (C) 2007 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_LAYER_BITMAP_H
-#define ANDROID_LAYER_BITMAP_H
-
-#include <stdint.h>
-#include <sys/types.h>
-
-#include <ui/PixelFormat.h>
-#include <ui/Rect.h>
-#include <pixelflinger/pixelflinger.h>
-#include <private/ui/SurfaceBuffer.h>
-
-struct android_native_buffer_t;
-
-namespace android {
-
-// ===========================================================================
-// Buffer
-// ===========================================================================
-
-class Buffer : public SurfaceBuffer
-{
-public:
-    enum {
-        DONT_CLEAR  = 0x00000001,
-        SECURE      = 0x00000004
-    };
-
-    Buffer();
-
-    // creates w * h buffer
-    Buffer(uint32_t w, uint32_t h, PixelFormat format,
-            uint32_t reqUsage, uint32_t flags = 0);
-
-    // return status
-    status_t initCheck() const;
-
-    uint32_t getWidth() const           { return width; }
-    uint32_t getHeight() const          { return height; }
-    uint32_t getStride() const          { return stride; }
-    uint32_t getUsage() const           { return usage; }
-    PixelFormat getPixelFormat() const  { return format; }
-    Rect getBounds() const              { return Rect(width, height); }
-    
-    status_t lock(GGLSurface* surface, uint32_t usage);
-    
-    android_native_buffer_t* getNativeBuffer() const;
-    
-    status_t reallocate(uint32_t w, uint32_t h, PixelFormat f,
-            uint32_t reqUsage, uint32_t flags);
-
-private:
-    friend class LightRefBase<Buffer>;
-    Buffer(const Buffer& rhs);
-    virtual ~Buffer();
-    Buffer& operator = (const Buffer& rhs);
-    const Buffer& operator = (const Buffer& rhs) const;
-
-    status_t initSize(uint32_t w, uint32_t h, PixelFormat format,
-            uint32_t reqUsage, uint32_t flags);
-
-    ssize_t     mInitCheck;
-    uint32_t    mVStride;
-};
-
-}; // namespace android
-
-#endif // ANDROID_LAYER_BITMAP_H
diff --git a/libs/surfaceflinger/DisplayHardware/DisplayHardware.cpp b/libs/surfaceflinger/DisplayHardware/DisplayHardware.cpp
index 8a7abec..f84933e 100644
--- a/libs/surfaceflinger/DisplayHardware/DisplayHardware.cpp
+++ b/libs/surfaceflinger/DisplayHardware/DisplayHardware.cpp
@@ -123,7 +123,7 @@
     EGLint numConfigs=0;
     EGLSurface surface;
     EGLContext context;
-    mFlags = 0;
+    mFlags = CACHED_BUFFERS;
 
     // TODO: all the extensions below should be queried through
     // eglGetProcAddress().
@@ -239,12 +239,17 @@
 
     eglMakeCurrent(display, surface, surface, context);
     const char* const  gl_extensions = (const char*)glGetString(GL_EXTENSIONS);
+    const char* const  gl_renderer = (const char*)glGetString(GL_RENDERER);
     LOGI("OpenGL informations:");
     LOGI("vendor    : %s", glGetString(GL_VENDOR));
-    LOGI("renderer  : %s", glGetString(GL_RENDERER));
+    LOGI("renderer  : %s", gl_renderer);
     LOGI("version   : %s", glGetString(GL_VERSION));
     LOGI("extensions: %s", gl_extensions);
 
+    if (strstr(gl_renderer, "PowerVR SGX 530")) {
+        LOGD("Assuming uncached graphics buffers.");
+        mFlags &= ~CACHED_BUFFERS;
+    }
     if (strstr(gl_extensions, "GL_ARB_texture_non_power_of_two")) {
         mFlags |= NPOT_EXTENSION;
     }
diff --git a/libs/surfaceflinger/DisplayHardware/DisplayHardware.h b/libs/surfaceflinger/DisplayHardware/DisplayHardware.h
index cb688b7..6914d0c 100644
--- a/libs/surfaceflinger/DisplayHardware/DisplayHardware.h
+++ b/libs/surfaceflinger/DisplayHardware/DisplayHardware.h
@@ -51,6 +51,7 @@
         PARTIAL_UPDATES         = 0x00020000,   // video driver feature
         SLOW_CONFIG             = 0x00040000,   // software
         SWAP_RECTANGLE          = 0x00080000,
+        CACHED_BUFFERS          = 0x00100000
     };
 
     DisplayHardware(
diff --git a/libs/surfaceflinger/Layer.cpp b/libs/surfaceflinger/Layer.cpp
index 13201db..7fd5434 100644
--- a/libs/surfaceflinger/Layer.cpp
+++ b/libs/surfaceflinger/Layer.cpp
@@ -25,10 +25,10 @@
 #include <utils/Log.h>
 #include <utils/StopWatch.h>
 
+#include <ui/GraphicBuffer.h>
 #include <ui/PixelFormat.h>
 #include <ui/Surface.h>
 
-#include "Buffer.h"
 #include "clz.h"
 #include "Layer.h"
 #include "SurfaceFlinger.h"
@@ -51,6 +51,7 @@
         const sp<Client>& c, int32_t i)
     :   LayerBaseClient(flinger, display, c, i),
         mSecure(false),
+        mNoEGLImageForSwBuffers(false),
         mNeedsBlending(true),
         mNeedsDithering(false)
 {
@@ -108,25 +109,22 @@
     const DisplayHardware& hw(graphicPlane(0).displayHardware());
     PixelFormatInfo displayInfo;
     getPixelFormatInfo(hw.getFormat(), &displayInfo);
-
-    uint32_t bufferFlags = 0;
-    if (flags & ISurfaceComposer::eSecure)
-        bufferFlags |= Buffer::SECURE;
-
+    const uint32_t hwFlags = hw.getFlags();
+    
     mFormat = format;
     mWidth = w;
     mHeight = h;
-    mSecure = (bufferFlags & Buffer::SECURE) ? true : false;
+    mSecure = (flags & ISurfaceComposer::eSecure) ? true : false;
     mNeedsBlending = (info.h_alpha - info.l_alpha) > 0;
-
+    mNoEGLImageForSwBuffers = !(hwFlags & DisplayHardware::CACHED_BUFFERS);
+    
     // we use the red index
     int displayRedSize = displayInfo.getSize(PixelFormatInfo::INDEX_RED);
     int layerRedsize = info.getSize(PixelFormatInfo::INDEX_RED);
     mNeedsDithering = layerRedsize > displayRedSize;
 
-    mBufferFlags = bufferFlags;
     for (size_t i=0 ; i<NUM_BUFFERS ; i++) {
-        mBuffers[i] = new Buffer();
+        mBuffers[i] = new GraphicBuffer();
     }
     mSurface = new SurfaceLayer(mFlinger, clientIndex(), this);
     return NO_ERROR;
@@ -135,8 +133,9 @@
 void Layer::reloadTexture(const Region& dirty)
 {
     Mutex::Autolock _l(mLock);
-    sp<Buffer> buffer(getFrontBuffer());
-    if (LIKELY(mFlags & DisplayHardware::DIRECT_TEXTURE)) {
+    sp<GraphicBuffer> buffer(getFrontBufferLocked());
+    if (LIKELY((mFlags & DisplayHardware::DIRECT_TEXTURE) &&
+            (buffer->usage & GRALLOC_USAGE_HW_TEXTURE))) {
         int index = mFrontBufferIndex;
         if (LIKELY(!mTextures[index].dirty)) {
             glBindTexture(GL_TEXTURE_2D, mTextures[index].name);
@@ -187,6 +186,7 @@
                     mFlags &= ~DisplayHardware::DIRECT_TEXTURE;
                 } else {
                     // Everything went okay!
+                    mTextures[index].NPOTAdjust = false;
                     mTextures[index].dirty  = false;
                     mTextures[index].width  = clientBuf->width;
                     mTextures[index].height = clientBuf->height;
@@ -194,15 +194,21 @@
             }                
         }
     } else {
+        for (size_t i=0 ; i<NUM_BUFFERS ; i++)
+            mTextures[i].image = EGL_NO_IMAGE_KHR;
+
         GGLSurface t;
-        status_t res = buffer->lock(&t, GRALLOC_USAGE_SW_READ_RARELY);
+        status_t res = buffer->lock(&t, GRALLOC_USAGE_SW_READ_OFTEN);
         LOGE_IF(res, "error %d (%s) locking buffer %p",
                 res, strerror(res), buffer.get());
+        
         if (res == NO_ERROR) {
             if (UNLIKELY(mTextures[0].name == -1U)) {
                 mTextures[0].name = createTexture();
+                mTextures[0].width = 0;
+                mTextures[0].height = 0;
             }
-            loadTexture(&mTextures[0], mTextures[0].name, dirty, t);
+            loadTexture(&mTextures[0], dirty, t);
             buffer->unlock();
         }
     }
@@ -211,8 +217,9 @@
 
 void Layer::onDraw(const Region& clip) const
 {
-    const int index = (mFlags & DisplayHardware::DIRECT_TEXTURE) ? 
-            mFrontBufferIndex : 0;
+    int index = mFrontBufferIndex;
+    if (mTextures[index].image == EGL_NO_IMAGE_KHR)
+        index = 0;
     GLuint textureName = mTextures[index].name;
     if (UNLIKELY(textureName == -1LU)) {
         // the texture has not been created yet, this Layer has
@@ -224,9 +231,9 @@
     drawWithOpenGL(clip, mTextures[index]);
 }
 
-sp<SurfaceBuffer> Layer::requestBuffer(int index, int usage)
+sp<GraphicBuffer> Layer::requestBuffer(int index, int usage)
 {
-    sp<Buffer> buffer;
+    sp<GraphicBuffer> buffer;
 
     // this ensures our client doesn't go away while we're accessing
     // the shared area.
@@ -269,14 +276,15 @@
         mBuffers[index].clear();
     }
 
+    const uint32_t effectiveUsage = getEffectiveUsage(usage);
     if (buffer!=0 && buffer->getStrongCount() == 1) {
-        err = buffer->reallocate(w, h, mFormat, usage, mBufferFlags);
+        err = buffer->reallocate(w, h, mFormat, effectiveUsage);
     } else {
         // here we have to reallocate a new buffer because we could have a
         // client in our process with a reference to it (eg: status bar),
         // and we can't release the handle under its feet.
         buffer.clear();
-        buffer = new Buffer(w, h, mFormat, usage, mBufferFlags);
+        buffer = new GraphicBuffer(w, h, mFormat, effectiveUsage);
         err = buffer->initCheck();
     }
 
@@ -305,6 +313,40 @@
     return buffer;
 }
 
+uint32_t Layer::getEffectiveUsage(uint32_t usage) const
+{
+    /*
+     *  buffers used for software rendering, but h/w composition
+     *  are allocated with SW_READ_OFTEN | SW_WRITE_OFTEN | HW_TEXTURE
+     *
+     *  buffers used for h/w rendering and h/w composition
+     *  are allocated with  HW_RENDER | HW_TEXTURE
+     *
+     *  buffers used with h/w rendering and either NPOT or no egl_image_ext
+     *  are allocated with SW_READ_RARELY | HW_RENDER
+     *
+     */
+
+    if (mSecure) {
+        // secure buffer, don't store it into the GPU
+        usage = GraphicBuffer::USAGE_SW_READ_OFTEN |
+                GraphicBuffer::USAGE_SW_WRITE_OFTEN;
+    } else {
+        // it's allowed to modify the usage flags here, but generally
+        // the requested flags should be honored.
+        if (mNoEGLImageForSwBuffers) {
+            if (usage & GraphicBuffer::USAGE_HW_MASK) {
+                // request EGLImage for h/w buffers only
+                usage |= GraphicBuffer::USAGE_HW_TEXTURE;
+            }
+        } else {
+            // request EGLImage for all buffers
+            usage |= GraphicBuffer::USAGE_HW_TEXTURE;
+        }
+    }
+    return usage;
+}
+
 uint32_t Layer::doTransaction(uint32_t flags)
 {
     const Layer::State& front(drawingState());
@@ -383,7 +425,7 @@
     mFrontBufferIndex = buf;
 
     // get the dirty region
-    sp<Buffer> newFrontBuffer(getBuffer(buf));
+    sp<GraphicBuffer> newFrontBuffer(getBuffer(buf));
     const Region dirty(lcblk->getDirtyRegion(buf));
     mPostedDirtyRegion = dirty.intersect( newFrontBuffer->getBounds() );
 
@@ -412,16 +454,20 @@
 
             // recompute visible region
             recomputeVisibleRegions = true;
-
-            // we now have the correct size, unfreeze the screen
-            mFreezeLock.clear();
         }
+
+        // we now have the correct size, unfreeze the screen
+        mFreezeLock.clear();
     }
 
-    // FIXME: signal an event if we have more buffers waiting
-    // mFlinger->signalEvent();
+    if (lcblk->getQueuedCount()) {
+        // signal an event if we have more buffers waiting
+        mFlinger->signalEvent();
+    }
 
-    reloadTexture( mPostedDirtyRegion );
+    if (!mPostedDirtyRegion.isEmpty()) {
+        reloadTexture( mPostedDirtyRegion );
+    }
 }
 
 void Layer::unlockPageFlip(
@@ -465,9 +511,9 @@
 {
 }
 
-sp<SurfaceBuffer> Layer::SurfaceLayer::requestBuffer(int index, int usage)
+sp<GraphicBuffer> Layer::SurfaceLayer::requestBuffer(int index, int usage)
 {
-    sp<SurfaceBuffer> buffer;
+    sp<GraphicBuffer> buffer;
     sp<Layer> owner(getOwner());
     if (owner != 0) {
         LOGE_IF(uint32_t(index)>=NUM_BUFFERS,
diff --git a/libs/surfaceflinger/Layer.h b/libs/surfaceflinger/Layer.h
index f111840..702c51a 100644
--- a/libs/surfaceflinger/Layer.h
+++ b/libs/surfaceflinger/Layer.h
@@ -20,6 +20,7 @@
 #include <stdint.h>
 #include <sys/types.h>
 
+#include <ui/GraphicBuffer.h>
 #include <ui/PixelFormat.h>
 #include <pixelflinger/pixelflinger.h>
 
@@ -28,7 +29,6 @@
 #include <GLES/gl.h>
 #include <GLES/glext.h>
 
-#include "Buffer.h"
 #include "LayerBase.h"
 #include "Transform.h"
 
@@ -38,7 +38,6 @@
 
 class Client;
 class FreezeLock;
-class Buffer;
 
 // ---------------------------------------------------------------------------
 
@@ -74,20 +73,22 @@
     virtual status_t ditch();
     
     // only for debugging
-    inline sp<Buffer> getBuffer(int i) { return mBuffers[i]; }
+    inline sp<GraphicBuffer> getBuffer(int i) { return mBuffers[i]; }
     // only for debugging
     inline const sp<FreezeLock>&  getFreezeLock() const { return mFreezeLock; }
     // only for debugging
     inline PixelFormat pixelFormat() const { return mFormat; }
 
 private:
-    inline sp<Buffer> getFrontBuffer() {
+    inline sp<GraphicBuffer> getFrontBufferLocked() {
         return mBuffers[mFrontBufferIndex];
     }
  
     void reloadTexture(const Region& dirty);
 
-    sp<SurfaceBuffer> requestBuffer(int index, int usage);
+    uint32_t getEffectiveUsage(uint32_t usage) const;
+
+    sp<GraphicBuffer> requestBuffer(int index, int usage);
     void destroy();
 
     class SurfaceLayer : public LayerBaseClient::Surface {
@@ -96,7 +97,7 @@
                 SurfaceID id, const sp<Layer>& owner);
         ~SurfaceLayer();
     private:
-        virtual sp<SurfaceBuffer> requestBuffer(int index, int usage);
+        virtual sp<GraphicBuffer> requestBuffer(int index, int usage);
         sp<Layer> getOwner() const {
             return static_cast<Layer*>(Surface::getOwner().get());
         }
@@ -106,16 +107,16 @@
     sp<Surface>             mSurface;
 
             bool            mSecure;
+            bool            mNoEGLImageForSwBuffers;
             int32_t         mFrontBufferIndex;
             bool            mNeedsBlending;
             bool            mNeedsDithering;
             Region          mPostedDirtyRegion;
             sp<FreezeLock>  mFreezeLock;
             PixelFormat     mFormat;
-            uint32_t        mBufferFlags;
             
             // protected by mLock
-            sp<Buffer>      mBuffers[NUM_BUFFERS];
+            sp<GraphicBuffer> mBuffers[NUM_BUFFERS];
             Texture         mTextures[NUM_BUFFERS];
             uint32_t        mWidth;
             uint32_t        mHeight;
diff --git a/libs/surfaceflinger/LayerBase.cpp b/libs/surfaceflinger/LayerBase.cpp
index 83814cc..b376e72 100644
--- a/libs/surfaceflinger/LayerBase.cpp
+++ b/libs/surfaceflinger/LayerBase.cpp
@@ -449,17 +449,9 @@
             glTranslatef(0, 1, 0);
             glRotatef(-90, 0, 0, 1);
         }
-
-        if (!(mFlags & (DisplayHardware::NPOT_EXTENSION |
-                DisplayHardware::DIRECT_TEXTURE))) {
-            // find the smallest power-of-two that will accommodate our surface
-            GLuint tw = 1 << (31 - clz(width));
-            GLuint th = 1 << (31 - clz(height));
-            if (tw < width)  tw <<= 1;
-            if (th < height) th <<= 1;
-            GLfloat ws = GLfloat(width) /tw;
-            GLfloat hs = GLfloat(height)/th;
-            glScalef(ws, hs, 1.0f);
+        
+        if (texture.NPOTAdjust) {
+            glScalef(texture.wScale, texture.hScale, 1.0f);
         }
 
         glEnableClientState(GL_TEXTURE_COORD_ARRAY);
@@ -508,21 +500,15 @@
     }
 }
 
-void LayerBase::loadTexture(Texture* texture, GLint textureName, 
+void LayerBase::loadTexture(Texture* texture, 
         const Region& dirty, const GGLSurface& t) const
 {
-    // TODO: defer the actual texture reload until LayerBase::validateTexture
-    // is called.
-
-    texture->name = textureName;
-    GLuint& textureWidth(texture->width);
-    GLuint& textureHeight(texture->height);
+    if (texture->name == -1U) {
+        // uh?
+        return;
+    }
     
-    uint32_t flags = mFlags;
-    glBindTexture(GL_TEXTURE_2D, textureName);
-
-    GLuint tw = t.width;
-    GLuint th = t.height;
+    glBindTexture(GL_TEXTURE_2D, texture->name);
 
     /*
      * In OpenGL ES we can't specify a stride with glTexImage2D (however,
@@ -547,64 +533,63 @@
     /*
      * round to POT if needed 
      */
-    
-    GLuint texture_w = tw;
-    GLuint texture_h = th;
-    if (!(flags & DisplayHardware::NPOT_EXTENSION)) {
-        // find the smallest power-of-two that will accommodate our surface
-        texture_w = 1 << (31 - clz(t.width));
-        texture_h = 1 << (31 - clz(t.height));
-        if (texture_w < t.width)  texture_w <<= 1;
-        if (texture_h < t.height) texture_h <<= 1;
+    if (!(mFlags & DisplayHardware::NPOT_EXTENSION)) {
+        texture->NPOTAdjust = true;
     }
     
-regular:
+    if (texture->NPOTAdjust) {
+        // find the smallest power-of-two that will accommodate our surface
+        texture->potWidth  = 1 << (31 - clz(t.width));
+        texture->potHeight = 1 << (31 - clz(t.height));
+        if (texture->potWidth  < t.width)  texture->potWidth  <<= 1;
+        if (texture->potHeight < t.height) texture->potHeight <<= 1;
+        texture->wScale = float(t.width)  / texture->potWidth;
+        texture->hScale = float(t.height) / texture->potHeight;
+    } else {
+        texture->potWidth  = t.width;
+        texture->potHeight = t.height;
+    }
+
     Rect bounds(dirty.bounds());
     GLvoid* data = 0;
-    if (texture_w!=textureWidth || texture_h!=textureHeight) {
-        // texture size changed, we need to create a new one
+    if (texture->width != t.width || texture->height != t.height) {
+        texture->width  = t.width;
+        texture->height = t.height;
 
-        if (!textureWidth || !textureHeight) {
-            // this is the first time, load the whole texture
-            if (texture_w==tw && texture_h==th) {
-                // we can do it one pass
-                data = t.data;
-            } else {
-                // we have to create the texture first because it
-                // doesn't match the size of the buffer
-                bounds.set(Rect(tw, th));
-            }
+        // texture size changed, we need to create a new one
+        bounds.set(Rect(t.width, t.height));
+        if (t.width  == texture->potWidth &&
+            t.height == texture->potHeight) {
+            // we can do it one pass
+            data = t.data;
         }
-        
+
         if (t.format == GGL_PIXEL_FORMAT_RGB_565) {
             glTexImage2D(GL_TEXTURE_2D, 0,
-                    GL_RGB, texture_w, texture_h, 0,
+                    GL_RGB, texture->potWidth, texture->potHeight, 0,
                     GL_RGB, GL_UNSIGNED_SHORT_5_6_5, data);
         } else if (t.format == GGL_PIXEL_FORMAT_RGBA_4444) {
             glTexImage2D(GL_TEXTURE_2D, 0,
-                    GL_RGBA, texture_w, texture_h, 0,
+                    GL_RGBA, texture->potWidth, texture->potHeight, 0,
                     GL_RGBA, GL_UNSIGNED_SHORT_4_4_4_4, data);
         } else if (t.format == GGL_PIXEL_FORMAT_RGBA_8888 || 
                    t.format == GGL_PIXEL_FORMAT_RGBX_8888) {
             glTexImage2D(GL_TEXTURE_2D, 0,
-                    GL_RGBA, texture_w, texture_h, 0,
+                    GL_RGBA, texture->potWidth, texture->potHeight, 0,
                     GL_RGBA, GL_UNSIGNED_BYTE, data);
         } else if ( t.format == GGL_PIXEL_FORMAT_YCbCr_422_SP ||
                     t.format == GGL_PIXEL_FORMAT_YCbCr_420_SP) {
             // just show the Y plane of YUV buffers
             glTexImage2D(GL_TEXTURE_2D, 0,
-                    GL_LUMINANCE, texture_w, texture_h, 0,
+                    GL_LUMINANCE, texture->potWidth, texture->potHeight, 0,
                     GL_LUMINANCE, GL_UNSIGNED_BYTE, data);
         } else {
             // oops, we don't handle this format!
             LOGE("layer %p, texture=%d, using format %d, which is not "
-                 "supported by the GL", this, textureName, t.format);
-            textureName = -1;
+                 "supported by the GL", this, texture->name, t.format);
         }
-        textureWidth = texture_w;
-        textureHeight = texture_h;
     }
-    if (!data && textureName>=0) {
+    if (!data) {
         if (t.format == GGL_PIXEL_FORMAT_RGB_565) {
             glTexSubImage2D(GL_TEXTURE_2D, 0,
                     0, bounds.top, t.width, bounds.height(),
@@ -747,7 +732,7 @@
     return BnSurface::onTransact(code, data, reply, flags);
 }
 
-sp<SurfaceBuffer> LayerBaseClient::Surface::requestBuffer(int index, int usage) 
+sp<GraphicBuffer> LayerBaseClient::Surface::requestBuffer(int index, int usage) 
 {
     return NULL; 
 }
diff --git a/libs/surfaceflinger/LayerBase.h b/libs/surfaceflinger/LayerBase.h
index 0dfa4fe..efa4f8c 100644
--- a/libs/surfaceflinger/LayerBase.h
+++ b/libs/surfaceflinger/LayerBase.h
@@ -39,12 +39,11 @@
 
 // ---------------------------------------------------------------------------
 
-class SurfaceFlinger;
 class DisplayHardware;
-class GraphicPlane;
 class Client;
-class SurfaceBuffer;
-class Buffer;
+class GraphicBuffer;
+class GraphicPlane;
+class SurfaceFlinger;
 
 // ---------------------------------------------------------------------------
 
@@ -241,12 +240,18 @@
     
           struct Texture {
               Texture() : name(-1U), width(0), height(0),
-                  image(EGL_NO_IMAGE_KHR), transform(0), dirty(true) { }
+                  image(EGL_NO_IMAGE_KHR), transform(0), 
+                  NPOTAdjust(false), dirty(true) { }
               GLuint        name;
               GLuint        width;
               GLuint        height;
+              GLuint        potWidth;
+              GLuint        potHeight;
+              GLfloat       wScale;
+              GLfloat       hScale;
               EGLImageKHR   image;
               uint32_t      transform;
+              bool          NPOTAdjust;
               bool          dirty;
           };
 
@@ -254,7 +259,7 @@
                                GLclampx b, GLclampx alpha) const;
           void clearWithOpenGL(const Region& clip) const;
           void drawWithOpenGL(const Region& clip, const Texture& texture) const;
-          void loadTexture(Texture* texture, GLint textureName, 
+          void loadTexture(Texture* texture, 
                   const Region& dirty, const GGLSurface& t) const;
 
           
@@ -339,7 +344,7 @@
         sp<LayerBaseClient> getOwner() const;
 
     private:
-        virtual sp<SurfaceBuffer> requestBuffer(int index, int usage);
+        virtual sp<GraphicBuffer> requestBuffer(int index, int usage);
         virtual status_t registerBuffers(const ISurface::BufferHeap& buffers); 
         virtual void postBuffer(ssize_t offset);
         virtual void unregisterBuffers();
diff --git a/libs/surfaceflinger/LayerBlur.cpp b/libs/surfaceflinger/LayerBlur.cpp
index 0ef663f..744f2e9 100644
--- a/libs/surfaceflinger/LayerBlur.cpp
+++ b/libs/surfaceflinger/LayerBlur.cpp
@@ -189,8 +189,8 @@
             } else {
                 GLuint tw = 1 << (31 - clz(w));
                 GLuint th = 1 << (31 - clz(h));
-                if (tw < w) tw <<= 1;
-                if (th < h) th <<= 1;
+                if (tw < GLuint(w)) tw <<= 1;
+                if (th < GLuint(h)) th <<= 1;
                 glTexImage2D(GL_TEXTURE_2D, 0, mReadFormat, tw, th, 0,
                         mReadFormat, mReadType, NULL);
                 glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, w, h, 
diff --git a/libs/surfaceflinger/LayerBuffer.cpp b/libs/surfaceflinger/LayerBuffer.cpp
index 667571b..7e27a02 100644
--- a/libs/surfaceflinger/LayerBuffer.cpp
+++ b/libs/surfaceflinger/LayerBuffer.cpp
@@ -23,13 +23,12 @@
 #include <utils/Log.h>
 #include <utils/StopWatch.h>
 
+#include <ui/GraphicBuffer.h>
 #include <ui/PixelFormat.h>
 #include <ui/FramebufferNativeWindow.h>
 
 #include <hardware/copybit.h>
 
-#include "Buffer.h"
-#include "BufferAllocator.h"
 #include "LayerBuffer.h"
 #include "SurfaceFlinger.h"
 #include "DisplayHardware/DisplayHardware.h"
@@ -474,9 +473,9 @@
                         mTempBitmap->getWidth() < size_t(tmp_w) || 
                         mTempBitmap->getHeight() < size_t(tmp_h)) {
                     mTempBitmap.clear();
-                    mTempBitmap = new android::Buffer(
-                            tmp_w, tmp_h, src.img.format,
-                            BufferAllocator::USAGE_HW_2D);
+                    mTempBitmap = new GraphicBuffer(
+                            tmp_w, tmp_h, src.img.format, 
+                            GraphicBuffer::USAGE_HW_2D);
                     err = mTempBitmap->initCheck();
                 }
 
@@ -549,7 +548,7 @@
         t.format = src.img.format;
         t.data = (GGLubyte*)src.img.base;
         const Region dirty(Rect(t.width, t.height));
-        mLayer.loadTexture(&mTexture, mTexture.name, dirty, t);
+        mLayer.loadTexture(&mTexture, dirty, t);
         mTexture.transform = mBufferHeap.transform;
         mLayer.drawWithOpenGL(clip, mTexture);
     }
diff --git a/libs/surfaceflinger/LayerBuffer.h b/libs/surfaceflinger/LayerBuffer.h
index 0452818..5eb472c 100644
--- a/libs/surfaceflinger/LayerBuffer.h
+++ b/libs/surfaceflinger/LayerBuffer.h
@@ -20,9 +20,6 @@
 #include <stdint.h>
 #include <sys/types.h>
 
-#include <binder/IMemory.h>
-#include <private/ui/LayerState.h>
-
 #include "LayerBase.h"
 
 struct copybit_device_t;
@@ -133,7 +130,7 @@
         status_t                        mStatus;
         ISurface::BufferHeap            mBufferHeap;
         size_t                          mBufferSize;
-        mutable sp<android::Buffer>     mTempBitmap;
+        mutable sp<GraphicBuffer>       mTempBitmap;
         mutable LayerBase::Texture      mTexture;
         copybit_device_t*               mBlitEngine;
     };
diff --git a/libs/surfaceflinger/LayerDim.cpp b/libs/surfaceflinger/LayerDim.cpp
index 8ba0a9d..538dc77 100644
--- a/libs/surfaceflinger/LayerDim.cpp
+++ b/libs/surfaceflinger/LayerDim.cpp
@@ -21,8 +21,8 @@
 #include <utils/Errors.h>
 #include <utils/Log.h>
 
-#include "Buffer.h"
-#include "BufferAllocator.h"
+#include <ui/GraphicBuffer.h>
+
 #include "LayerDim.h"
 #include "SurfaceFlinger.h"
 #include "DisplayHardware/DisplayHardware.h"
@@ -70,9 +70,9 @@
 
     if (LIKELY(flags & DisplayHardware::DIRECT_TEXTURE)) {
         // TODO: api to pass the usage flags
-        sp<Buffer> buffer = new Buffer(w, h, PIXEL_FORMAT_RGB_565,
-                 BufferAllocator::USAGE_SW_WRITE_OFTEN |
-                 BufferAllocator::USAGE_HW_TEXTURE);
+        sp<GraphicBuffer> buffer = new GraphicBuffer(w, h, PIXEL_FORMAT_RGB_565,
+                 GraphicBuffer::USAGE_SW_WRITE_OFTEN |
+                 GraphicBuffer::USAGE_HW_TEXTURE);
         
         android_native_buffer_t* clientBuf = buffer->getNativeBuffer();
 
diff --git a/libs/surfaceflinger/SurfaceFlinger.cpp b/libs/surfaceflinger/SurfaceFlinger.cpp
index f2b918f..9694cf1 100644
--- a/libs/surfaceflinger/SurfaceFlinger.cpp
+++ b/libs/surfaceflinger/SurfaceFlinger.cpp
@@ -37,6 +37,7 @@
 #include <utils/String16.h>
 #include <utils/StopWatch.h>
 
+#include <ui/GraphicBufferAllocator.h>
 #include <ui/PixelFormat.h>
 #include <ui/DisplayInfo.h>
 
@@ -44,8 +45,6 @@
 #include <GLES/gl.h>
 
 #include "clz.h"
-#include "Buffer.h"
-#include "BufferAllocator.h"
 #include "Layer.h"
 #include "LayerBlur.h"
 #include "LayerBuffer.h"
@@ -190,6 +189,7 @@
         mLastSwapBufferTime(0),
         mDebugInTransaction(0),
         mLastTransactionTime(0),
+        mBootFinished(false),
         mConsoleSignals(0),
         mSecureFrameBuffer(0)
 {
@@ -294,6 +294,7 @@
     const nsecs_t now = systemTime();
     const nsecs_t duration = now - mBootTime;
     LOGI("Boot is finished (%ld ms)", long(ns2ms(duration)) );  
+    mBootFinished = true;
     property_set("ctl.stop", "bootanim");
 }
 
@@ -1521,8 +1522,8 @@
             if (l != 0) {
                 SharedBufferStack::Statistics stats = l->lcblk->getStats();
                 result.append( l->lcblk->dump("      ") );
-                sp<const Buffer> buf0(l->getBuffer(0));
-                sp<const Buffer> buf1(l->getBuffer(1));
+                sp<const GraphicBuffer> buf0(l->getBuffer(0));
+                sp<const GraphicBuffer> buf1(l->getBuffer(1));
                 uint32_t w0=0, h0=0, s0=0;
                 uint32_t w1=0, h1=0, s1=0;
                 if (buf0 != 0) {
@@ -1573,7 +1574,7 @@
         }
         snprintf(buffer, SIZE, "  client count: %d\n", mClientsMap.size());
         result.append(buffer);
-        const BufferAllocator& alloc(BufferAllocator::get());
+        const GraphicBufferAllocator& alloc(GraphicBufferAllocator::get());
         alloc.dump(result);
 
         if (locked) {
diff --git a/libs/surfaceflinger/SurfaceFlinger.h b/libs/surfaceflinger/SurfaceFlinger.h
index e446070..6698e00 100644
--- a/libs/surfaceflinger/SurfaceFlinger.h
+++ b/libs/surfaceflinger/SurfaceFlinger.h
@@ -293,7 +293,7 @@
             inline void decFreezeCount() { if (mFreezeCount > 0) mFreezeCount--; }
             inline bool hasFreezeRequest() const { return mFreezeDisplay; }
             inline bool isFrozen() const { 
-                return mFreezeDisplay || mFreezeCount>0;
+                return (mFreezeDisplay || mFreezeCount>0) && mBootFinished;
             }
 
             
@@ -351,6 +351,7 @@
                 nsecs_t                     mLastSwapBufferTime;
                 volatile nsecs_t            mDebugInTransaction;
                 nsecs_t                     mLastTransactionTime;
+                bool                        mBootFinished;
 
                 // these are thread safe
     mutable     Barrier                     mReadyToRunBarrier;
diff --git a/libs/ui/Android.mk b/libs/ui/Android.mk
index 9577044..84aec61 100644
--- a/libs/ui/Android.mk
+++ b/libs/ui/Android.mk
@@ -2,13 +2,15 @@
 include $(CLEAR_VARS)
 
 LOCAL_SRC_FILES:= \
-	BufferMapper.cpp \
 	Camera.cpp \
 	CameraParameters.cpp \
 	EGLUtils.cpp \
 	EventHub.cpp \
 	EventRecurrence.cpp \
 	FramebufferNativeWindow.cpp \
+	GraphicBuffer.cpp \
+	GraphicBufferAllocator.cpp \
+	GraphicBufferMapper.cpp \
 	KeyLayoutMap.cpp \
 	KeyCharacterMap.cpp \
 	ICamera.cpp \
@@ -25,9 +27,7 @@
 	Region.cpp \
 	SharedBufferStack.cpp \
 	Surface.cpp \
-	SurfaceBuffer.cpp \
-	SurfaceComposerClient.cpp \
-	SurfaceFlingerSynchro.cpp 
+	SurfaceComposerClient.cpp
 
 LOCAL_SHARED_LIBRARIES := \
 	libcutils \
diff --git a/libs/ui/BufferMapper.cpp b/libs/ui/BufferMapper.cpp
deleted file mode 100644
index 4add8f9..0000000
--- a/libs/ui/BufferMapper.cpp
+++ /dev/null
@@ -1,80 +0,0 @@
-/*
- * Copyright (C) 2007 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.
- */
-
-#define LOG_TAG "BufferMapper"
-
-#include <stdint.h>
-#include <errno.h>
-
-#include <utils/Errors.h>
-#include <utils/Log.h>
-
-#include <ui/BufferMapper.h>
-#include <ui/Rect.h>
-
-#include <hardware/gralloc.h>
-
-
-namespace android {
-// ---------------------------------------------------------------------------
-
-ANDROID_SINGLETON_STATIC_INSTANCE( BufferMapper )
-
-BufferMapper::BufferMapper()
-    : mAllocMod(0)
-{
-    hw_module_t const* module;
-    int err = hw_get_module(GRALLOC_HARDWARE_MODULE_ID, &module);
-    LOGE_IF(err, "FATAL: can't find the %s module", GRALLOC_HARDWARE_MODULE_ID);
-    if (err == 0) {
-        mAllocMod = (gralloc_module_t const *)module;
-    }
-}
-
-status_t BufferMapper::registerBuffer(buffer_handle_t handle)
-{
-    status_t err = mAllocMod->registerBuffer(mAllocMod, handle);
-    LOGW_IF(err, "registerBuffer(%p) failed %d (%s)",
-            handle, err, strerror(-err));
-    return err;
-}
-
-status_t BufferMapper::unregisterBuffer(buffer_handle_t handle)
-{
-    status_t err = mAllocMod->unregisterBuffer(mAllocMod, handle);
-    LOGW_IF(err, "unregisterBuffer(%p) failed %d (%s)",
-            handle, err, strerror(-err));
-    return err;
-}
-
-status_t BufferMapper::lock(buffer_handle_t handle, 
-        int usage, const Rect& bounds, void** vaddr)
-{
-    status_t err = mAllocMod->lock(mAllocMod, handle, usage,
-            bounds.left, bounds.top, bounds.width(), bounds.height(), vaddr);
-    LOGW_IF(err, "lock(...) failed %d (%s)", err, strerror(-err));
-    return err;
-}
-
-status_t BufferMapper::unlock(buffer_handle_t handle)
-{
-    status_t err = mAllocMod->unlock(mAllocMod, handle);
-    LOGW_IF(err, "unlock(...) failed %d (%s)", err, strerror(-err));
-    return err;
-}
-
-// ---------------------------------------------------------------------------
-}; // namespace android
diff --git a/libs/ui/GraphicBuffer.cpp b/libs/ui/GraphicBuffer.cpp
new file mode 100644
index 0000000..1cf20d7
--- /dev/null
+++ b/libs/ui/GraphicBuffer.cpp
@@ -0,0 +1,213 @@
+/*
+ * Copyright (C) 2007 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.
+ */
+
+#include <stdlib.h>
+#include <stdint.h>
+#include <sys/types.h>
+
+#include <binder/Parcel.h>
+
+#include <utils/Errors.h>
+#include <utils/Log.h>
+
+#include <ui/GraphicBuffer.h>
+#include <ui/GraphicBufferAllocator.h>
+#include <ui/GraphicBufferMapper.h>
+#include <ui/PixelFormat.h>
+
+#include <pixelflinger/pixelflinger.h>
+
+namespace android {
+
+// ===========================================================================
+// Buffer and implementation of android_native_buffer_t
+// ===========================================================================
+
+GraphicBuffer::GraphicBuffer()
+    : BASE(), mOwner(false), mBufferMapper(GraphicBufferMapper::get()),
+      mInitCheck(NO_ERROR),  mVStride(0), mIndex(-1)
+{
+    width  = 
+    height = 
+    stride = 
+    format = 
+    usage  = 0;
+    handle = NULL;
+}
+
+GraphicBuffer::GraphicBuffer(uint32_t w, uint32_t h, 
+        PixelFormat reqFormat, uint32_t reqUsage)
+    : BASE(), mOwner(false), mBufferMapper(GraphicBufferMapper::get()),
+      mInitCheck(NO_ERROR),  mVStride(0), mIndex(-1)
+{
+    width  = 
+    height = 
+    stride = 
+    format = 
+    usage  = 0;
+    handle = NULL;
+    mInitCheck = initSize(w, h, reqFormat, reqUsage);
+}
+
+GraphicBuffer::GraphicBuffer(const Parcel& data) 
+    : BASE(), mOwner(true), mBufferMapper(GraphicBufferMapper::get()),
+      mInitCheck(NO_ERROR),  mVStride(0), mIndex(-1)
+{
+    // we own the handle in this case
+    width  = data.readInt32();
+    if (width < 0) {
+        width = height = stride = format = usage = 0;
+        handle = 0;
+    } else {
+        height = data.readInt32();
+        stride = data.readInt32();
+        format = data.readInt32();
+        usage  = data.readInt32();
+        handle = data.readNativeHandle();
+    }
+}
+
+GraphicBuffer::~GraphicBuffer()
+{
+    if (handle) {
+        if (mOwner) {
+            native_handle_close(handle);
+            native_handle_delete(const_cast<native_handle*>(handle));
+        } else {
+            GraphicBufferAllocator& allocator(GraphicBufferAllocator::get());
+            allocator.free(handle);
+        }
+    }
+}
+
+status_t GraphicBuffer::initCheck() const {
+    return mInitCheck;
+}
+
+android_native_buffer_t* GraphicBuffer::getNativeBuffer() const
+{
+    return static_cast<android_native_buffer_t*>(
+            const_cast<GraphicBuffer*>(this));
+}
+
+status_t GraphicBuffer::reallocate(uint32_t w, uint32_t h, PixelFormat f,
+        uint32_t reqUsage)
+{
+    if (handle) {
+        GraphicBufferAllocator& allocator(GraphicBufferAllocator::get());
+        allocator.free(handle);
+        handle = 0;
+    }
+    return initSize(w, h, f, reqUsage);
+}
+
+status_t GraphicBuffer::initSize(uint32_t w, uint32_t h, PixelFormat format,
+        uint32_t reqUsage)
+{
+    if (format == PIXEL_FORMAT_RGBX_8888)
+        format = PIXEL_FORMAT_RGBA_8888;
+
+    GraphicBufferAllocator& allocator = GraphicBufferAllocator::get();
+    status_t err = allocator.alloc(w, h, format, reqUsage, &handle, &stride);
+    if (err == NO_ERROR) {
+        this->width  = w;
+        this->height = h;
+        this->format = format;
+        this->usage  = reqUsage;
+        mVStride = 0;
+    }
+    return err;
+}
+
+status_t GraphicBuffer::lock(uint32_t usage, void** vaddr)
+{
+    const Rect lockBounds(width, height);
+    status_t res = lock(usage, lockBounds, vaddr);
+    return res;
+}
+
+status_t GraphicBuffer::lock(uint32_t usage, const Rect& rect, void** vaddr)
+{
+    if (rect.left < 0 || rect.right  > this->width || 
+        rect.top  < 0 || rect.bottom > this->height) {
+        LOGE("locking pixels (%d,%d,%d,%d) outside of buffer (w=%d, h=%d)",
+                rect.left, rect.top, rect.right, rect.bottom, 
+                this->width, this->height);
+        return BAD_VALUE;
+    }
+    status_t res = getBufferMapper().lock(handle, usage, rect, vaddr);
+    return res;
+}
+
+status_t GraphicBuffer::unlock()
+{
+    status_t res = getBufferMapper().unlock(handle);
+    return res;
+}
+
+status_t GraphicBuffer::lock(GGLSurface* sur, uint32_t usage) 
+{
+    void* vaddr;
+    status_t res = GraphicBuffer::lock(usage, &vaddr);
+    if (res == NO_ERROR && sur) {
+        sur->version = sizeof(GGLSurface);
+        sur->width = width;
+        sur->height = height;
+        sur->stride = stride;
+        sur->format = format;
+        sur->vstride = mVStride;
+        sur->data = static_cast<GGLubyte*>(vaddr);
+    }
+    return res;
+}
+
+
+status_t GraphicBuffer::writeToParcel(Parcel* reply, 
+        android_native_buffer_t const* buffer)
+{
+    if (buffer == NULL)
+        return BAD_VALUE;
+
+    if (buffer->width < 0 || buffer->height < 0)
+        return BAD_VALUE;
+
+    status_t err = NO_ERROR;
+    if (buffer->handle == NULL) {
+        // this buffer doesn't have a handle
+        reply->writeInt32(NO_MEMORY);
+    } else {
+        reply->writeInt32(buffer->width);
+        reply->writeInt32(buffer->height);
+        reply->writeInt32(buffer->stride);
+        reply->writeInt32(buffer->format);
+        reply->writeInt32(buffer->usage);
+        err = reply->writeNativeHandle(buffer->handle);
+    }
+    return err;
+}
+
+
+void GraphicBuffer::setIndex(int index) {
+    mIndex = index;
+}
+
+int GraphicBuffer::getIndex() const {
+    return mIndex;
+}
+
+// ---------------------------------------------------------------------------
+
+}; // namespace android
diff --git a/libs/surfaceflinger/BufferAllocator.cpp b/libs/ui/GraphicBufferAllocator.cpp
similarity index 74%
rename from libs/surfaceflinger/BufferAllocator.cpp
rename to libs/ui/GraphicBufferAllocator.cpp
index 3e37bc3..57d5fc3 100644
--- a/libs/surfaceflinger/BufferAllocator.cpp
+++ b/libs/ui/GraphicBufferAllocator.cpp
@@ -20,18 +20,20 @@
 #include <utils/Singleton.h>
 #include <utils/String8.h>
 
-#include "BufferAllocator.h"
+#include <ui/GraphicBufferAllocator.h>
 
+#include <private/ui/sw_gralloc_handle.h>
 
 namespace android {
 // ---------------------------------------------------------------------------
 
-ANDROID_SINGLETON_STATIC_INSTANCE( BufferAllocator )
+ANDROID_SINGLETON_STATIC_INSTANCE( GraphicBufferAllocator )
 
-Mutex BufferAllocator::sLock;
-KeyedVector<buffer_handle_t, BufferAllocator::alloc_rec_t> BufferAllocator::sAllocList;
+Mutex GraphicBufferAllocator::sLock;
+KeyedVector<buffer_handle_t,
+    GraphicBufferAllocator::alloc_rec_t> GraphicBufferAllocator::sAllocList;
 
-BufferAllocator::BufferAllocator()
+GraphicBufferAllocator::GraphicBufferAllocator()
     : mAllocDev(0)
 {
     hw_module_t const* module;
@@ -42,12 +44,12 @@
     }
 }
 
-BufferAllocator::~BufferAllocator()
+GraphicBufferAllocator::~GraphicBufferAllocator()
 {
     gralloc_close(mAllocDev);
 }
 
-void BufferAllocator::dump(String8& result) const
+void GraphicBufferAllocator::dump(String8& result) const
 {
     Mutex::Autolock _l(sLock);
     KeyedVector<buffer_handle_t, alloc_rec_t>& list(sAllocList);
@@ -73,7 +75,7 @@
     return c>0 ? c : 1;
 }
 
-status_t BufferAllocator::alloc(uint32_t w, uint32_t h, PixelFormat format,
+status_t GraphicBufferAllocator::alloc(uint32_t w, uint32_t h, PixelFormat format,
         int usage, buffer_handle_t* handle, int32_t* stride)
 {
     Mutex::Autolock _l(mLock);
@@ -83,8 +85,13 @@
     h = clamp(h);
 
     // we have a h/w allocator and h/w buffer is requested
-    status_t err = mAllocDev->alloc(mAllocDev,
-            w, h, format, usage, handle, stride);
+    status_t err; 
+    
+    if (usage & GRALLOC_USAGE_HW_MASK) {
+        err = mAllocDev->alloc(mAllocDev, w, h, format, usage, handle, stride);
+    } else {
+        err = sw_gralloc_handle_t::alloc(w, h, format, usage, handle, stride);
+    }
 
     LOGW_IF(err, "alloc(%u, %u, %d, %08x, ...) failed %d (%s)",
             w, h, format, usage, err, strerror(-err));
@@ -109,13 +116,18 @@
     return err;
 }
 
-status_t BufferAllocator::free(buffer_handle_t handle)
+status_t GraphicBufferAllocator::free(buffer_handle_t handle)
 {
     Mutex::Autolock _l(mLock);
 
-    status_t err = mAllocDev->free(mAllocDev, handle);
+    status_t err;
+    if (sw_gralloc_handle_t::validate(handle) < 0) {
+        err = mAllocDev->free(mAllocDev, handle);
+    } else {
+        err = sw_gralloc_handle_t::free((sw_gralloc_handle_t*)handle);
+    }
+
     LOGW_IF(err, "free(...) failed %d (%s)", err, strerror(-err));
-    
     if (err == NO_ERROR) {
         Mutex::Autolock _l(sLock);
         KeyedVector<buffer_handle_t, alloc_rec_t>& list(sAllocList);
diff --git a/libs/ui/GraphicBufferMapper.cpp b/libs/ui/GraphicBufferMapper.cpp
new file mode 100644
index 0000000..ce2acd0
--- /dev/null
+++ b/libs/ui/GraphicBufferMapper.cpp
@@ -0,0 +1,228 @@
+/*
+ * Copyright (C) 2007 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.
+ */
+
+#define LOG_TAG "GraphicBufferMapper"
+
+#include <stdint.h>
+#ifdef HAVE_ANDROID_OS      // just want PAGE_SIZE define
+# include <asm/page.h>
+#else
+# include <sys/user.h>
+#endif
+#include <errno.h>
+#include <sys/mman.h>
+
+#include <cutils/ashmem.h>
+
+#include <utils/Errors.h>
+#include <utils/Log.h>
+
+#include <ui/GraphicBufferMapper.h>
+#include <ui/Rect.h>
+
+#include <hardware/gralloc.h>
+
+#include <private/ui/sw_gralloc_handle.h>
+
+
+namespace android {
+// ---------------------------------------------------------------------------
+
+ANDROID_SINGLETON_STATIC_INSTANCE( GraphicBufferMapper )
+
+GraphicBufferMapper::GraphicBufferMapper()
+    : mAllocMod(0)
+{
+    hw_module_t const* module;
+    int err = hw_get_module(GRALLOC_HARDWARE_MODULE_ID, &module);
+    LOGE_IF(err, "FATAL: can't find the %s module", GRALLOC_HARDWARE_MODULE_ID);
+    if (err == 0) {
+        mAllocMod = (gralloc_module_t const *)module;
+    }
+}
+
+status_t GraphicBufferMapper::registerBuffer(buffer_handle_t handle)
+{
+    status_t err;
+    if (sw_gralloc_handle_t::validate(handle) < 0) {
+        err = mAllocMod->registerBuffer(mAllocMod, handle);
+    } else {
+        err = sw_gralloc_handle_t::registerBuffer((sw_gralloc_handle_t*)handle);
+    }
+    LOGW_IF(err, "registerBuffer(%p) failed %d (%s)",
+            handle, err, strerror(-err));
+    return err;
+}
+
+status_t GraphicBufferMapper::unregisterBuffer(buffer_handle_t handle)
+{
+    status_t err;
+    if (sw_gralloc_handle_t::validate(handle) < 0) {
+        err = mAllocMod->unregisterBuffer(mAllocMod, handle);
+    } else {
+        err = sw_gralloc_handle_t::unregisterBuffer((sw_gralloc_handle_t*)handle);
+    }
+    LOGW_IF(err, "unregisterBuffer(%p) failed %d (%s)",
+            handle, err, strerror(-err));
+    return err;
+}
+
+status_t GraphicBufferMapper::lock(buffer_handle_t handle, 
+        int usage, const Rect& bounds, void** vaddr)
+{
+    status_t err;
+    if (sw_gralloc_handle_t::validate(handle) < 0) {
+        err = mAllocMod->lock(mAllocMod, handle, usage,
+                bounds.left, bounds.top, bounds.width(), bounds.height(),
+                vaddr);
+    } else {
+        err = sw_gralloc_handle_t::lock((sw_gralloc_handle_t*)handle, usage,
+                bounds.left, bounds.top, bounds.width(), bounds.height(),
+                vaddr);
+    }
+    LOGW_IF(err, "lock(...) failed %d (%s)", err, strerror(-err));
+    return err;
+}
+
+status_t GraphicBufferMapper::unlock(buffer_handle_t handle)
+{
+    status_t err;
+    if (sw_gralloc_handle_t::validate(handle) < 0) {
+        err = mAllocMod->unlock(mAllocMod, handle);
+    } else {
+        err = sw_gralloc_handle_t::unlock((sw_gralloc_handle_t*)handle);
+    }
+    LOGW_IF(err, "unlock(...) failed %d (%s)", err, strerror(-err));
+    return err;
+}
+
+// ---------------------------------------------------------------------------
+
+status_t sw_gralloc_handle_t::alloc(uint32_t w, uint32_t h, int format,
+        int usage, buffer_handle_t* pHandle, int32_t* pStride)
+{
+    int align = 4;
+    int bpp = 0;
+    switch (format) {
+        case HAL_PIXEL_FORMAT_RGBA_8888:
+        case HAL_PIXEL_FORMAT_RGBX_8888:
+        case HAL_PIXEL_FORMAT_BGRA_8888:
+            bpp = 4;
+            break;
+        case HAL_PIXEL_FORMAT_RGB_888:
+            bpp = 3;
+            break;
+        case HAL_PIXEL_FORMAT_RGB_565:
+        case HAL_PIXEL_FORMAT_RGBA_5551:
+        case HAL_PIXEL_FORMAT_RGBA_4444:
+            bpp = 2;
+            break;
+        default:
+            return -EINVAL;
+    }
+    size_t bpr = (w*bpp + (align-1)) & ~(align-1);
+    size_t size = bpr * h;
+    size_t stride = bpr / bpp;
+    size = (size + (PAGE_SIZE-1)) & ~(PAGE_SIZE-1);
+    
+    int fd = ashmem_create_region("sw-gralloc-buffer", size);
+    if (fd < 0) {
+        LOGE("ashmem_create_region(size=%d) failed (%s)",
+                size, strerror(-errno));
+        return -errno;
+    }
+    
+    int prot = PROT_READ;
+    if (usage & GRALLOC_USAGE_SW_WRITE_MASK)
+        prot |= PROT_WRITE;
+    
+    if (ashmem_set_prot_region(fd, prot) < 0) {
+        LOGE("ashmem_set_prot_region(fd=%d, prot=%x) failed (%s)",
+                fd, prot, strerror(-errno));
+        close(fd);
+        return -errno;
+    }
+
+    void* base = mmap(0, size, prot, MAP_SHARED, fd, 0);
+    if (base == MAP_FAILED) {
+        LOGE("alloc mmap(fd=%d, size=%d, prot=%x) failed (%s)",
+                fd, size, prot, strerror(-errno));
+        close(fd);
+        return -errno;
+    }
+
+    sw_gralloc_handle_t* hnd = new sw_gralloc_handle_t();
+    hnd->fd = fd;
+    hnd->size = size;
+    hnd->base = intptr_t(base);
+    hnd->prot = prot;
+    *pStride = stride;
+    *pHandle = hnd; 
+    
+    return NO_ERROR;
+}
+
+status_t sw_gralloc_handle_t::free(sw_gralloc_handle_t* hnd)
+{
+    if (hnd->base) {
+        munmap((void*)hnd->base, hnd->size);
+    }
+    if (hnd->fd >= 0) {
+        close(hnd->fd);
+    }
+    delete hnd;    
+    return NO_ERROR;
+}
+
+status_t sw_gralloc_handle_t::registerBuffer(sw_gralloc_handle_t* hnd)
+{
+    if (hnd->pid != getpid()) {
+        void* base = mmap(0, hnd->size, hnd->prot, MAP_SHARED, hnd->fd, 0);
+        if (base == MAP_FAILED) {
+            LOGE("registerBuffer mmap(fd=%d, size=%d, prot=%x) failed (%s)",
+                    hnd->fd, hnd->size, hnd->prot, strerror(-errno));
+            return -errno;
+        }
+        hnd->base = intptr_t(base);
+    }
+    return NO_ERROR;
+}
+
+status_t sw_gralloc_handle_t::unregisterBuffer(sw_gralloc_handle_t* hnd)
+{
+    if (hnd->pid != getpid()) {
+        if (hnd->base) {
+            munmap((void*)hnd->base, hnd->size);
+        }
+        hnd->base = 0;
+    }
+    return NO_ERROR;
+}
+
+status_t sw_gralloc_handle_t::lock(sw_gralloc_handle_t* hnd, int usage,
+        int l, int t, int w, int h, void** vaddr)
+{
+    *vaddr = (void*)hnd->base;
+    return NO_ERROR;
+}
+
+status_t sw_gralloc_handle_t::unlock(sw_gralloc_handle_t* hnd)
+{
+    return NO_ERROR;
+}
+
+// ---------------------------------------------------------------------------
+}; // namespace android
diff --git a/libs/ui/ISurface.cpp b/libs/ui/ISurface.cpp
index a2dbe7f..4fb38ed 100644
--- a/libs/ui/ISurface.cpp
+++ b/libs/ui/ISurface.cpp
@@ -27,7 +27,7 @@
 #include <ui/Overlay.h>
 #include <ui/Surface.h>
 
-#include <private/ui/SurfaceBuffer.h>
+#include <ui/GraphicBuffer.h>
 
 namespace android {
 
@@ -71,14 +71,14 @@
     {
     }
 
-    virtual sp<SurfaceBuffer> requestBuffer(int bufferIdx, int usage)
+    virtual sp<GraphicBuffer> requestBuffer(int bufferIdx, int usage)
     {
         Parcel data, reply;
         data.writeInterfaceToken(ISurface::getInterfaceDescriptor());
         data.writeInt32(bufferIdx);
         data.writeInt32(usage);
         remote()->transact(REQUEST_BUFFER, data, &reply);
-        sp<SurfaceBuffer> buffer = new SurfaceBuffer(reply);
+        sp<GraphicBuffer> buffer = new GraphicBuffer(reply);
         return buffer;
     }
 
@@ -139,8 +139,8 @@
             CHECK_INTERFACE(ISurface, data, reply);
             int bufferIdx = data.readInt32();
             int usage = data.readInt32();
-            sp<SurfaceBuffer> buffer(requestBuffer(bufferIdx, usage));
-            return SurfaceBuffer::writeToParcel(reply, buffer.get());
+            sp<GraphicBuffer> buffer(requestBuffer(bufferIdx, usage));
+            return GraphicBuffer::writeToParcel(reply, buffer.get());
         }
         case REGISTER_BUFFERS: {
             CHECK_INTERFACE(ISurface, data, reply);
diff --git a/libs/ui/SharedBufferStack.cpp b/libs/ui/SharedBufferStack.cpp
index 47c596c..46b6766 100644
--- a/libs/ui/SharedBufferStack.cpp
+++ b/libs/ui/SharedBufferStack.cpp
@@ -97,10 +97,10 @@
 // ----------------------------------------------------------------------------
 
 SharedBufferBase::SharedBufferBase(SharedClient* sharedClient,
-        int surface, int num)
+        int surface, int num, int32_t identity)
     : mSharedClient(sharedClient), 
       mSharedStack(sharedClient->surfaces + surface),
-      mNumBuffers(num)
+      mNumBuffers(num), mIdentity(identity)
 {
 }
 
@@ -248,8 +248,8 @@
 // ============================================================================
 
 SharedBufferClient::SharedBufferClient(SharedClient* sharedClient,
-        int surface, int num)
-    : SharedBufferBase(sharedClient, surface, num), tail(0)
+        int surface, int num, int32_t identity)
+    : SharedBufferBase(sharedClient, surface, num, identity), tail(0)
 {
     tail = computeTail();
 }
@@ -353,7 +353,7 @@
 
 SharedBufferServer::SharedBufferServer(SharedClient* sharedClient,
         int surface, int num, int32_t identity)
-    : SharedBufferBase(sharedClient, surface, num)
+    : SharedBufferBase(sharedClient, surface, num, identity)
 {
     mSharedStack->init(identity);
     mSharedStack->head = num-1;
@@ -394,6 +394,12 @@
     return NO_ERROR;
 }
 
+int32_t SharedBufferServer::getQueuedCount() const
+{
+    SharedBufferStack& stack( *mSharedStack );
+    return stack.queued;
+}
+
 status_t SharedBufferServer::assertReallocate(int buffer)
 {
     ReallocateCondition condition(this, buffer);
diff --git a/libs/ui/Surface.cpp b/libs/ui/Surface.cpp
index 285edb4..f51ca7a 100644
--- a/libs/ui/Surface.cpp
+++ b/libs/ui/Surface.cpp
@@ -31,7 +31,8 @@
 #include <utils/Log.h>
 
 #include <ui/DisplayInfo.h>
-#include <ui/BufferMapper.h>
+#include <ui/GraphicBuffer.h>
+#include <ui/GraphicBufferMapper.h>
 #include <ui/ISurface.h>
 #include <ui/Surface.h>
 #include <ui/SurfaceComposerClient.h>
@@ -41,15 +42,14 @@
 
 #include <private/ui/SharedBufferStack.h>
 #include <private/ui/LayerState.h>
-#include <private/ui/SurfaceBuffer.h>
 
 namespace android {
 
 // ----------------------------------------------------------------------
 
 static status_t copyBlt(
-        const sp<SurfaceBuffer>& dst, 
-        const sp<SurfaceBuffer>& src, 
+        const sp<GraphicBuffer>& dst, 
+        const sp<GraphicBuffer>& src, 
         const Region& reg)
 {
     status_t err;
@@ -310,17 +310,17 @@
     : mClient(surface->mClient), mSurface(surface->mSurface),
       mToken(surface->mToken), mIdentity(surface->mIdentity),
       mFormat(surface->mFormat), mFlags(surface->mFlags),
-      mBufferMapper(BufferMapper::get()), mSharedBufferClient(NULL),
+      mBufferMapper(GraphicBufferMapper::get()), mSharedBufferClient(NULL),
       mWidth(surface->mWidth), mHeight(surface->mHeight)
 {
     mSharedBufferClient = new SharedBufferClient(
-            mClient->mControl, mToken, 2);
+            mClient->mControl, mToken, 2, mIdentity);
 
     init();
 }
 
 Surface::Surface(const Parcel& parcel)
-    :  mBufferMapper(BufferMapper::get()), mSharedBufferClient(NULL)
+    :  mBufferMapper(GraphicBufferMapper::get()), mSharedBufferClient(NULL)
 {
     sp<IBinder> clientBinder = parcel.readStrongBinder();
     mSurface    = interface_cast<ISurface>(parcel.readStrongBinder());
@@ -336,7 +336,7 @@
         mClient = SurfaceComposerClient::clientForConnection(clientBinder);
 
         mSharedBufferClient = new SharedBufferClient(
-                mClient->mControl, mToken, 2);
+                mClient->mControl, mToken, 2, mIdentity);
     }
 
     init();
@@ -473,11 +473,11 @@
 
 // ----------------------------------------------------------------------------
 
-status_t Surface::dequeueBuffer(sp<SurfaceBuffer>* buffer) {
+status_t Surface::dequeueBuffer(sp<GraphicBuffer>* buffer) {
     android_native_buffer_t* out;
     status_t err = dequeueBuffer(&out);
     if (err == NO_ERROR) {
-        *buffer = SurfaceBuffer::getSelf(out);
+        *buffer = GraphicBuffer::getSelf(out);
     }
     return err;
 }
@@ -500,7 +500,7 @@
 
     // below we make sure we AT LEAST have the usage flags we want
     const uint32_t usage(getUsage());
-    const sp<SurfaceBuffer>& backBuffer(mBuffers[bufIdx]);
+    const sp<GraphicBuffer>& backBuffer(mBuffers[bufIdx]);
     if (backBuffer == 0 || 
         ((uint32_t(backBuffer->usage) & usage) != usage) ||
         mSharedBufferClient->needNewBuffer(bufIdx)) 
@@ -537,7 +537,7 @@
     if (err != NO_ERROR)
         return err;
 
-    int32_t bufIdx = SurfaceBuffer::getSelf(buffer)->getIndex();
+    int32_t bufIdx = GraphicBuffer::getSelf(buffer)->getIndex();
     err = mSharedBufferClient->lock(bufIdx);
     LOGE_IF(err, "error locking buffer %d (%s)", bufIdx, strerror(-err));
     return err;
@@ -554,7 +554,7 @@
         mDirtyRegion.set(mSwapRectangle);
     }
     
-    int32_t bufIdx = SurfaceBuffer::getSelf(buffer)->getIndex();
+    int32_t bufIdx = GraphicBuffer::getSelf(buffer)->getIndex();
     mSharedBufferClient->setDirtyRegion(bufIdx, mDirtyRegion);
     err = mSharedBufferClient->queue(bufIdx);
     LOGE_IF(err, "error queuing buffer %d (%s)", bufIdx, strerror(-err));
@@ -627,7 +627,7 @@
     // we're intending to do software rendering from this point
     setUsage(GRALLOC_USAGE_SW_READ_OFTEN | GRALLOC_USAGE_SW_WRITE_OFTEN);
 
-    sp<SurfaceBuffer> backBuffer;
+    sp<GraphicBuffer> backBuffer;
     status_t err = dequeueBuffer(&backBuffer);
     LOGE_IF(err, "dequeueBuffer failed (%s)", strerror(-err));
     if (err == NO_ERROR) {
@@ -652,7 +652,7 @@
                 newDirtyRegion.andSelf(bounds);
             }
 
-            const sp<SurfaceBuffer>& frontBuffer(mPostedBuffer);
+            const sp<GraphicBuffer>& frontBuffer(mPostedBuffer);
             if (frontBuffer !=0 &&
                 backBuffer->width  == frontBuffer->width && 
                 backBuffer->height == frontBuffer->height &&
@@ -721,13 +721,13 @@
     status_t err = NO_MEMORY;
 
     // free the current buffer
-    sp<SurfaceBuffer>& currentBuffer(mBuffers[index]);
+    sp<GraphicBuffer>& currentBuffer(mBuffers[index]);
     if (currentBuffer != 0) {
         getBufferMapper().unregisterBuffer(currentBuffer->handle);
         currentBuffer.clear();
     }
 
-    sp<SurfaceBuffer> buffer = s->requestBuffer(index, usage);
+    sp<GraphicBuffer> buffer = s->requestBuffer(index, usage);
     LOGE_IF(buffer==0,
             "ISurface::getBuffer(%d, %08x) returned NULL",
             index, usage);
@@ -746,6 +746,8 @@
                 currentBuffer->setIndex(index);
                 mNeedFullUpdate = true;
             }
+        } else {
+            err = err<0 ? err : NO_MEMORY;
         }
     }
     return err; 
diff --git a/libs/ui/SurfaceBuffer.cpp b/libs/ui/SurfaceBuffer.cpp
deleted file mode 100644
index 0510bc1..0000000
--- a/libs/ui/SurfaceBuffer.cpp
+++ /dev/null
@@ -1,134 +0,0 @@
-/*
- * Copyright (C) 2009 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.
- */
-
-#define LOG_TAG "SurfaceBuffer"
-
-#include <stdint.h>
-#include <errno.h>
-#include <sys/types.h>
-
-#include <utils/Errors.h>
-#include <utils/Log.h>
-#include <binder/Parcel.h>
-
-#include <ui/BufferMapper.h>
-#include <ui/Rect.h>
-#include <private/ui/SurfaceBuffer.h>
-
-namespace android {
-
-// ============================================================================
-//  SurfaceBuffer
-// ============================================================================
-
-SurfaceBuffer::SurfaceBuffer() 
-    : BASE(), mOwner(false), mBufferMapper(BufferMapper::get()), mIndex(-1)
-{
-    width  = 
-    height = 
-    stride = 
-    format = 
-    usage  = 0;
-    handle = NULL;
-}
-
-SurfaceBuffer::SurfaceBuffer(const Parcel& data) 
-    : BASE(), mOwner(true), mBufferMapper(BufferMapper::get())
-{
-    // we own the handle in this case
-    width  = data.readInt32();
-    if (width < 0) {
-        width = height = stride = format = usage = 0;
-        handle = 0;
-    } else {
-        height = data.readInt32();
-        stride = data.readInt32();
-        format = data.readInt32();
-        usage  = data.readInt32();
-        handle = data.readNativeHandle();
-    }
-}
-
-SurfaceBuffer::~SurfaceBuffer()
-{
-    if (handle && mOwner) {
-        native_handle_close(handle);
-        native_handle_delete(const_cast<native_handle*>(handle));
-    }
-}
-
-status_t SurfaceBuffer::lock(uint32_t usage, void** vaddr)
-{
-    const Rect lockBounds(width, height);
-    status_t res = lock(usage, lockBounds, vaddr);
-    return res;
-}
-
-status_t SurfaceBuffer::lock(uint32_t usage, const Rect& rect, void** vaddr)
-{
-    if (rect.left < 0 || rect.right  > this->width || 
-        rect.top  < 0 || rect.bottom > this->height) {
-        LOGE("locking pixels (%d,%d,%d,%d) outside of buffer (w=%d, h=%d)",
-                rect.left, rect.top, rect.right, rect.bottom, 
-                this->width, this->height);
-        return BAD_VALUE;
-    }
-    status_t res = getBufferMapper().lock(handle, usage, rect, vaddr);
-    return res;
-}
-
-status_t SurfaceBuffer::unlock()
-{
-    status_t res = getBufferMapper().unlock(handle);
-    return res;
-}
-
-status_t SurfaceBuffer::writeToParcel(Parcel* reply, 
-        android_native_buffer_t const* buffer)
-{
-    if (buffer == NULL)
-        return BAD_VALUE;
-
-    if (buffer->width < 0 || buffer->height < 0)
-        return BAD_VALUE;
-
-    status_t err = NO_ERROR;
-    if (buffer->handle == NULL) {
-        // this buffer doesn't have a handle
-        reply->writeInt32(NO_MEMORY);
-    } else {
-        reply->writeInt32(buffer->width);
-        reply->writeInt32(buffer->height);
-        reply->writeInt32(buffer->stride);
-        reply->writeInt32(buffer->format);
-        reply->writeInt32(buffer->usage);
-        err = reply->writeNativeHandle(buffer->handle);
-    }
-    return err;
-}
-
-
-void SurfaceBuffer::setIndex(int index) {
-    mIndex = index;
-}
-
-int SurfaceBuffer::getIndex() const {
-    return mIndex;
-}
-
-
-}; // namespace android
-
diff --git a/libs/ui/SurfaceComposerClient.cpp b/libs/ui/SurfaceComposerClient.cpp
index 3baa281..eda84ef 100644
--- a/libs/ui/SurfaceComposerClient.cpp
+++ b/libs/ui/SurfaceComposerClient.cpp
@@ -42,7 +42,6 @@
 
 #include <private/ui/LayerState.h>
 #include <private/ui/SharedBufferStack.h>
-#include <private/ui/SurfaceFlingerSynchro.h>
 
 #define VERBOSE(...)	((void)0)
 //#define VERBOSE			LOGD
@@ -155,7 +154,6 @@
 {
     VERBOSE("Creating client %p, conn %p", this, conn.get());
 
-    mSignalServer = 0;
     mPrebuiltLayerState = 0;
     mTransactionOpen = 0;
     mStatus = NO_ERROR;
@@ -168,7 +166,7 @@
     }
 
     mControlMemory = mClient->getControlBlock();
-    mSignalServer = new SurfaceFlingerSynchro(sm);
+    mSignalServer = sm;
     mControl = static_cast<SharedClient *>(mControlMemory->getBase());
 }
 
@@ -225,7 +223,6 @@
         Mutex::Autolock _lg(gLock);
         Mutex::Autolock _lm(mLock);
 
-        delete mSignalServer;
         mSignalServer = 0;
 
         if (mClient != 0) {
diff --git a/libs/ui/SurfaceFlingerSynchro.cpp b/libs/ui/SurfaceFlingerSynchro.cpp
deleted file mode 100644
index c81db71..0000000
--- a/libs/ui/SurfaceFlingerSynchro.cpp
+++ /dev/null
@@ -1,42 +0,0 @@
-/*
- * Copyright (C) 2008 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.
- */
-
-#include <stdint.h>
-
-#include <private/ui/SurfaceFlingerSynchro.h>
-
-namespace android {
-
-// ---------------------------------------------------------------------------
-
-SurfaceFlingerSynchro::SurfaceFlingerSynchro(const sp<ISurfaceComposer>& flinger)
-    : mSurfaceComposer(flinger)
-{
-}
-SurfaceFlingerSynchro::~SurfaceFlingerSynchro()
-{
-}
-
-status_t SurfaceFlingerSynchro::signal()
-{
-    mSurfaceComposer->signal();
-    return NO_ERROR;
-}
-
-// ---------------------------------------------------------------------------
-
-}; // namespace android
-
diff --git a/opengl/libs/Android.mk b/opengl/libs/Android.mk
index d6c7114..9578452 100644
--- a/opengl/libs/Android.mk
+++ b/opengl/libs/Android.mk
@@ -32,10 +32,6 @@
 LOCAL_CFLAGS += -DADRENO130=1
 endif
 
-ifeq ($(TARGET_BOARD_PLATFORM),qsd8k)
-LOCAL_CFLAGS += -DADRENO130=1
-endif
-
 include $(BUILD_SHARED_LIBRARY)
 installed_libEGL := $(LOCAL_INSTALLED_MODULE)
 
diff --git a/opengl/libs/GLES_CM/gl.cpp b/opengl/libs/GLES_CM/gl.cpp
index 3204d9a..1e4c136 100644
--- a/opengl/libs/GLES_CM/gl.cpp
+++ b/opengl/libs/GLES_CM/gl.cpp
@@ -31,6 +31,9 @@
 
 using namespace android;
 
+// set this to 1 for crude GL debugging
+#define CHECK_FOR_GL_ERRORS     0
+
 // ----------------------------------------------------------------------------
 // extensions for the framework
 // ----------------------------------------------------------------------------
@@ -71,7 +74,7 @@
 #undef CALL_GL_API
 #undef CALL_GL_API_RETURN
 
-#if USE_FAST_TLS_KEY
+#if USE_FAST_TLS_KEY && !CHECK_FOR_GL_ERRORS
 
     #define API_ENTRY(_api) __attribute__((naked)) _api
 
@@ -95,12 +98,27 @@
 
 #else
 
+    #if CHECK_FOR_GL_ERRORS
+    
+        #define CHECK_GL_ERRORS(_api) \
+            do { GLint err = glGetError(); \
+                LOGE_IF(err != GL_NO_ERROR, "%s failed (0x%04X)", #_api, err); \
+            } while(false);
+
+    #else
+
+        #define CHECK_GL_ERRORS(_api) do { } while(false);
+
+    #endif
+
+
     #define API_ENTRY(_api) _api
 
     #define CALL_GL_API(_api, ...)                                      \
         gl_hooks_t::gl_t const * const _c = &getGlThreadSpecific()->gl; \
-        _c->_api(__VA_ARGS__)
-    
+        _c->_api(__VA_ARGS__);                                          \
+        CHECK_GL_ERRORS(_api)
+
     #define CALL_GL_API_RETURN(_api, ...)                               \
         gl_hooks_t::gl_t const * const _c = &getGlThreadSpecific()->gl; \
         return _c->_api(__VA_ARGS__)
diff --git a/opengl/tests/copybits/Android.mk b/opengl/tests/copybits/Android.mk
deleted file mode 100644
index d5ded42..0000000
--- a/opengl/tests/copybits/Android.mk
+++ /dev/null
@@ -1,18 +0,0 @@
-LOCAL_PATH:= $(call my-dir)
-include $(CLEAR_VARS)
-
-LOCAL_SRC_FILES:= \
-	copybits.cpp
-
-LOCAL_SHARED_LIBRARIES := \
-	libcutils \
-    libEGL \
-    libGLESv1_CM \
-    libui
-
-LOCAL_MODULE:= test-opengl-copybits
-
-LOCAL_MODULE_TAGS := tests
-
-include $(BUILD_EXECUTABLE)
-
diff --git a/opengl/tests/copybits/copybits.cpp b/opengl/tests/copybits/copybits.cpp
deleted file mode 100644
index 11dfb6e..0000000
--- a/opengl/tests/copybits/copybits.cpp
+++ /dev/null
@@ -1,726 +0,0 @@
-// Test software OpenGL hardware accelleration using copybits.
-
-#define LOG_TAG "copybits_test"
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <math.h>
-#include <sys/types.h>
-#include <stdlib.h>
-#include <string.h>
-#include <sys/time.h>
-
-#include <ui/PixelFormat.h>
-
-#include <cutils/log.h>
-#include <cutils/native_handle.h>
-
-#include <utils/Atomic.h>
-
-#include <private/ui/SurfaceBuffer.h>
-#include <pixelflinger/pixelflinger.h>
-
-#include <hardware/gralloc.h>
-#include <hardware/hardware.h>
-
-#include <ui/FramebufferNativeWindow.h>
-#include <ui/EGLUtils.h>
-
-#define EGL_EGLEXT_PROTOTYPES
-#define GL_GLEXT_PROTOTYPES
-
-#include <EGL/egl.h>
-#include <EGL/eglext.h>
-
-#include <GLES/gl.h>
-#include <GLES/glext.h>
-
-using namespace android;
-
-EGLDisplay eglDisplay;
-EGLSurface eglSurface;
-EGLContext eglContext;
-GLuint texture;
-
-hw_module_t const* gralloc_module;
-alloc_device_t  *sAllocDev;
-
-#define FIXED_ONE 0x10000 /* 1.0 in 16.16 fixed point. */
-
-int init_gl_surface();
-void free_gl_surface();
-void init_scene();
-
-int create_physical_texture();
-int readTimer();
-
-// ===========================================================================
-// Buffer an implementation of android_native_buffer_t
-// ===========================================================================
-
-class NativeBuffer;
-
-class Buffer : public android::SurfaceBuffer
-{
-public:
-    // creates w * h buffer
-    Buffer(uint32_t w, uint32_t h, PixelFormat format, uint32_t usage);
-
-    // return status
-    status_t initCheck() const;
-
-    uint32_t getWidth() const           { return width; }
-    uint32_t getHeight() const          { return height; }
-    uint32_t getStride() const          { return stride; }
-    uint32_t getUsage() const           { return usage; }
-    PixelFormat getPixelFormat() const  { return format; }
-    
-    
-    android_native_buffer_t* getNativeBuffer() const;
-
-    void setPixel(int x, int y, int r, int g, int b, int a);
-
-    status_t lock(GGLSurface* surface, uint32_t usage);
-    void lock() {
-        GGLSurface s;
-        lock(&s, GRALLOC_USAGE_SW_WRITE_OFTEN);
-        mData = (void*)s.data;
-    }
-
-private:
-    friend class LightRefBase<Buffer>;
-    Buffer(const Buffer& rhs);
-    virtual ~Buffer();
-    Buffer& operator = (const Buffer& rhs);
-    const Buffer& operator = (const Buffer& rhs) const;
-
-    status_t initSize(uint32_t w, uint32_t h);
-
-    ssize_t                 mInitCheck;
-    void*                   mData;
-};
-
-Buffer::Buffer(uint32_t w, uint32_t h, PixelFormat format, uint32_t usage)
-    : SurfaceBuffer(), mInitCheck(NO_INIT)
-{
-    this->usage = usage;
-    this->format = format;
-    if (w>0 && h>0) {
-        mInitCheck = initSize(w, h);
-    }
-}
-
-Buffer::~Buffer()
-{
-    if (handle) {
-        sAllocDev->free(sAllocDev, handle);
-    }
-}
-
-status_t Buffer::initCheck() const {
-    return mInitCheck;
-}
-
-android_native_buffer_t* Buffer::getNativeBuffer() const
-{
-    return static_cast<android_native_buffer_t*>(const_cast<Buffer*>(this));
-}
-
-status_t Buffer::initSize(uint32_t w, uint32_t h)
-{
-    status_t err = NO_ERROR;
-
-    err = sAllocDev->alloc(sAllocDev, w, h, format, usage, &handle, &stride);
-    
-    if (err == NO_ERROR) {
-        if (err == NO_ERROR) {
-            width  = w;
-            height = h;
-        }
-    }
-
-    return err;
-}
-
-status_t Buffer::lock(GGLSurface* sur, uint32_t usage) 
-{
-    void* vaddr;
-    status_t res = SurfaceBuffer::lock(usage, &vaddr);
-    if (res == NO_ERROR && sur) {
-        sur->version = sizeof(GGLSurface);
-        sur->width = width;
-        sur->height = height;
-        sur->stride = stride;
-        sur->format = format;
-        sur->data = static_cast<GGLubyte*>(vaddr);
-    }
-    return res;
-}
-
-
-void Buffer::setPixel(int x, int y, int r, int g, int b, int a) {
-    if (x < 0 || (unsigned int) x >= width
-            || y < 0 || (unsigned int) y >= height) {
-        // clipped
-        return;
-    }
-    int index = stride * y + x;
-    switch (format) {
-    case HAL_PIXEL_FORMAT_RGB_565: {
-            unsigned short val = (unsigned short) (
-                    ((0x1f & (r >> 3)) << 11)
-                    | ((0x3f & (g >> 2)) << 5)
-                    | (0x1f & (b >> 3)));
-            ((unsigned short*) mData)[index]= val;
-        }
-        break;
-    case HAL_PIXEL_FORMAT_RGBA_8888: { // ABGR
-        unsigned int val = (unsigned int)
-            (((a & 0xff) << 24)
-                    | ((b & 0xff) << 16)
-                    | ((g & 0xff) << 8)
-                    | (r & 0xff));
-            ((unsigned int*) mData)[index] = val;
-        }
-        break;
-    default:
-        // Unsupported pixel format
-        break;
-    }
-}
-
-
-static void gluLookAt(float eyeX, float eyeY, float eyeZ,
-        float centerX, float centerY, float centerZ, float upX, float upY,
-        float upZ)
-{
-    // See the OpenGL GLUT documentation for gluLookAt for a description
-    // of the algorithm. We implement it in a straightforward way:
-
-    float fx = centerX - eyeX;
-    float fy = centerY - eyeY;
-    float fz = centerZ - eyeZ;
-
-    // Normalize f
-    float rlf = 1.0f / sqrtf(fx*fx + fy*fy + fz*fz);
-    fx *= rlf;
-    fy *= rlf;
-    fz *= rlf;
-
-    // Normalize up
-    float rlup = 1.0f / sqrtf(upX*upX + upY*upY + upZ*upZ);
-    upX *= rlup;
-    upY *= rlup;
-    upZ *= rlup;
-
-    // compute s = f x up (x means "cross product")
-
-    float sx = fy * upZ - fz * upY;
-    float sy = fz * upX - fx * upZ;
-    float sz = fx * upY - fy * upX;
-
-    // compute u = s x f
-    float ux = sy * fz - sz * fy;
-    float uy = sz * fx - sx * fz;
-    float uz = sx * fy - sy * fx;
-
-    float m[16] ;
-    m[0] = sx;
-    m[1] = ux;
-    m[2] = -fx;
-    m[3] = 0.0f;
-
-    m[4] = sy;
-    m[5] = uy;
-    m[6] = -fy;
-    m[7] = 0.0f;
-
-    m[8] = sz;
-    m[9] = uz;
-    m[10] = -fz;
-    m[11] = 0.0f;
-
-    m[12] = 0.0f;
-    m[13] = 0.0f;
-    m[14] = 0.0f;
-    m[15] = 1.0f;
-
-    glMultMatrixf(m);
-    glTranslatef(-eyeX, -eyeY, -eyeZ);
-}
-
-int init_gralloc() {
-    int err = hw_get_module(GRALLOC_HARDWARE_MODULE_ID, &gralloc_module);
-    LOGE_IF(err, "FATAL: can't find the %s module", GRALLOC_HARDWARE_MODULE_ID);
-
-    if (err == 0) {
-        gralloc_open(gralloc_module, &sAllocDev);
-    }
-    return err;
-}
-
-int init_gl_surface(void)
-{
-    EGLint numConfigs = 1;
-    EGLConfig myConfig = {0};
-    EGLint attrib[] =
-    {
-            EGL_DEPTH_SIZE,     16,
-            EGL_NONE
-    };
-
-    EGLNativeWindowType window = android_createDisplaySurface();
-
-    printf("init_gl_surface\n");
-    if ( (eglDisplay = eglGetDisplay(EGL_DEFAULT_DISPLAY)) == EGL_NO_DISPLAY )
-    {
-        printf("eglGetDisplay failed\n");
-        return 0;
-    }
-
-    if ( eglInitialize(eglDisplay, NULL, NULL) != EGL_TRUE )
-    {
-        printf("eglInitialize failed\n");
-        return 0;
-    }
-
-    if ( EGLUtils::selectConfigForNativeWindow(eglDisplay, attrib, window, &myConfig) != 0)
-    {
-        printf("EGLUtils::selectConfigForNativeWindow failed\n");
-        return 0;
-    }
-        
-
-    if ( (eglSurface = eglCreateWindowSurface(eglDisplay, myConfig,
-            window, 0)) == EGL_NO_SURFACE )
-    {
-        printf("eglCreateWindowSurface failed\n");
-        return 0;
-    }
-
-    if ( (eglContext = eglCreateContext(eglDisplay, myConfig, 0, 0)) == EGL_NO_CONTEXT )
-    {
-        printf("eglCreateContext failed\n");
-        return 0;
-    }
-
-    if ( eglMakeCurrent(eglDisplay, eglSurface, eglSurface, eglContext) != EGL_TRUE )
-    {
-        printf("eglMakeCurrent failed\n");
-        return 0;
-    }
-
-#if EGL_ANDROID_swap_rectangle
-    eglSetSwapRectangleANDROID(eglDisplay, eglSurface, 0, 0, 320, 480);
-#endif
-    
-    return 1;
-}
-
-void free_gl_surface(void)
-{
-    if (eglDisplay != EGL_NO_DISPLAY)
-    {
-        eglMakeCurrent( eglDisplay, EGL_NO_SURFACE,
-                EGL_NO_SURFACE, EGL_NO_CONTEXT );
-        eglDestroyContext( eglDisplay, eglContext );
-        eglDestroySurface( eglDisplay, eglSurface );
-        eglTerminate( eglDisplay );
-        eglDisplay = EGL_NO_DISPLAY;
-    }
-}
-
-void init_scene(void)
-{
-    glDisable(GL_DITHER);
-    glEnable(GL_CULL_FACE);
-    float ratio = 320.0f /  480.0f;
-    glViewport(0, 0, 320, 480);
-
-    glMatrixMode(GL_PROJECTION);
-    glLoadIdentity();
-    glFrustumf(-ratio, ratio, -1, 1, 1, 10);
-
-    glMatrixMode(GL_MODELVIEW);
-
-    glLoadIdentity();
-    gluLookAt(
-            0, 0, 3,  // eye
-            0, 0, 0,  // center
-            0, 1, 0); // up
-
-    glEnable(GL_TEXTURE_2D);
-}
-
-// #define USE_ALPHA_COLOR
-
-#define USE_GL_REPLACE
-//#define USE_GL_MODULATE
-
-// #define USE_BLEND
-
-#define USE_565
-// #define USE_8888
-
-// #define USE_NEAREST
-#define USE_LINEAR
-
-#define USE_SCALE
-
-void setSmoothGradient(Buffer* bufferObject) {
-    int pixels = bufferObject->getHeight() * bufferObject->getWidth();
-    int step = 0;
-    for (unsigned int y = 0; y < bufferObject->getHeight(); y++) {
-        for(unsigned int x = 0; x < bufferObject->getWidth() ; x++) {
-            int grey = step * 255 / pixels;
-            bufferObject->setPixel(x, y, grey, grey, grey, 255);
-            ++step;
-        }
-    }
-}
-
-void setSmoothAlphaGradient(Buffer* bufferObject) {
-    int pixels = bufferObject->getHeight() * bufferObject->getWidth();
-    int step = 0;
-    for (unsigned int y = 0; y < bufferObject->getHeight(); y++) {
-        for(unsigned int x = 0; x < bufferObject->getWidth() ; x++) {
-            int grey = step * 255 / pixels;
-            bufferObject->setPixel(x, y, 255, 255, 255, grey);
-            ++step;
-        }
-    }
-}
-
-void setOrientedCheckerboard(Buffer* bufferObject) {
-    bufferObject->setPixel(0, 0, 0, 0, 0, 255);
-    for(unsigned int x = 1; x < bufferObject->getWidth() ; x++) {
-        bufferObject->setPixel(x, 0, 0, 255, 0, 255);
-    }
-    for (unsigned int y = 1; y < bufferObject->getHeight(); y++) {
-        for(unsigned int x = 0; x < bufferObject->getWidth() ; x++) {
-            if ((x ^ y ) & 1) {
-                bufferObject->setPixel(x, y, 255, 255, 255, 255);
-            } else {
-                bufferObject->setPixel(x, y, 255, 0, 0, 255);
-            }
-        }
-    }
-}
-
-int create_physical_texture(unsigned int w, unsigned int h)
-{
-
-#ifdef USE_565
-    PixelFormat format = HAL_PIXEL_FORMAT_RGB_565;
-#else
-    PixelFormat format = HAL_PIXEL_FORMAT_RGBA_8888;
-#endif
-    int usage = GRALLOC_USAGE_SW_READ_OFTEN |
-        GRALLOC_USAGE_SW_WRITE_OFTEN |
-        GRALLOC_USAGE_HW_TEXTURE |
-        GRALLOC_USAGE_HW_2D; /* This is the key to allocating the texture in pmem. */
-    int32_t stride;
-    buffer_handle_t handle;
-
-    // Allocate the hardware buffer
-    Buffer* bufferObject = new Buffer(w, h, format, usage);
-
-    android_native_buffer_t* buffer = bufferObject->getNativeBuffer();
-
-    buffer->common.incRef(&buffer->common);
-
-    // create the new EGLImageKHR
-    EGLint attrs[] = { EGL_IMAGE_PRESERVED_KHR, EGL_NONE };
-    EGLDisplay dpy = eglGetCurrentDisplay();
-    EGLImageKHR image = eglCreateImageKHR(dpy, EGL_NO_CONTEXT, EGL_NATIVE_BUFFER_ANDROID,
-            (EGLClientBuffer)buffer, attrs);
-    if (image == EGL_NO_IMAGE_KHR) {
-        printf("Could not create an image %d\n", eglGetError());
-        return -1;
-    }
-
-    bufferObject->lock();
-    setOrientedCheckerboard(bufferObject);
-    // setSmoothGradient(bufferObject);
-    // setSmoothAlphaGradient(bufferObject);
-    bufferObject->unlock();
-
-    glGenTextures(1, &texture);
-    glBindTexture(GL_TEXTURE_2D, texture);
-    glEGLImageTargetTexture2DOES(GL_TEXTURE_2D, image);
-#ifdef USE_LINEAR
-    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
-    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
-#elif defined(USE_NEAREST)
-    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
-    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
-#endif
-
-#ifdef USE_GL_REPLACE
-    glTexEnvx(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
-#elif defined(USE_GL_MODULATE)
-    glTexEnvx(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
-#endif
-
-#ifdef USE_ALPHA_COLOR
-    glColor4f(1.0f, 1.0f, 1.0f, 0.4f);
-#else
-    glColor4f(1.0f, 1.0f, 1.0f, 1.0f);
-#endif
-
-#ifdef USE_BLEND
-    glEnable(GL_BLEND);
-    glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
-#endif
-    return 0;
-}
-
-static const int SCALE_COUNT = 12;
-
-int scale(int base, int factor) {
-    static const float kTable[SCALE_COUNT] = {
-            0.24f, 0.25f, 0.5f, 0.75f, 1.0f,
-            1.5f, 2.0f, 2.5f, 3.0f, 3.5f, 4.0f, 5.0f
-    };
-    return base * kTable[factor];
-}
-
-class Timer {
-    struct timeval  first;
-    double elapsedSeconds;
-
-public:
-    Timer() {}
-    void start() {
-        gettimeofday(&first, NULL);
-    }
-
-    void stop() {
-        struct timeval  second,
-                        elapsed;
-        gettimeofday(&second, NULL);
-
-        if (first.tv_usec > second.tv_usec) {
-           second.tv_usec += 1000000;
-           second.tv_sec--;
-        }
-
-        elapsedSeconds = (second.tv_sec  - first.tv_sec) +
-            (second.tv_usec - first.tv_usec) / 1000000.0;
-    }
-
-    double getElapsedSeconds() {
-        return elapsedSeconds;
-    }
-
-    double getElapsedMs() {
-        return elapsedSeconds* 1000.0f;
-    }
-};
-
-int testTime()
-{
-    static const int WIDTH = 320;
-    static const int HEIGHT = 480;
-    static const int SCALE = 8;
-
-    if (create_physical_texture(WIDTH, HEIGHT) != 0) {
-        return -1;
-    }
-    // Need to do a dummy eglSwapBuffers first. Don't know why.
-    glClearColor(0.4, 1.0, 0.4, 0.4);
-    glClear(GL_DEPTH_BUFFER_BIT | GL_COLOR_BUFFER_BIT);
-    eglSwapBuffers(eglDisplay, eglSurface);
-
-    glClear(GL_DEPTH_BUFFER_BIT | GL_COLOR_BUFFER_BIT);
-
-#if defined(USE_SCALE)
-    static const int scaleOffset = 0;
-#else
-    static const int scaleOffset = 1;
-#endif
-    printf("ms\n");
-    for(int j = 0; j < SCALE; j++) {
-        int w = WIDTH >> (j + scaleOffset);
-        int h = HEIGHT >> j;
-        int cropRect[4] = {0,h,w,-h}; // Left bottom width height. Width and Height can be neg to flip.
-        glTexParameteriv(GL_TEXTURE_2D, GL_TEXTURE_CROP_RECT_OES, cropRect);
-        Timer timer;
-        timer.start();
-
-        int copyCount = 1000;
-        for (int i = 0; i < copyCount; i++) {
-            glDrawTexiOES(0, 0, 0, w, h);
-        }
-
-        timer.stop();
-        printf("%g\n", timer.getElapsedMs() / copyCount);
-    }
-
-    eglSwapBuffers(eglDisplay, eglSurface);
-    return 0;
-}
-
-int testStretch()
-{
-    static const int WIDTH = 8;
-    static const int HEIGHT = 8;
-
-    if (create_physical_texture(WIDTH, HEIGHT) != 0) {
-        return -1;
-    }
-    // Need to do a dummy eglSwapBuffers first. Don't know why.
-    glClearColor(0.4, 1.0, 0.4, 1.0);
-    glClear(GL_DEPTH_BUFFER_BIT | GL_COLOR_BUFFER_BIT);
-    eglSwapBuffers(eglDisplay, eglSurface);
-    
-    int cropRect[4] = {0,HEIGHT,WIDTH,-HEIGHT}; // Left bottom width height. Width and Height can be neg to flip.
-    glTexParameteriv(GL_TEXTURE_2D, GL_TEXTURE_CROP_RECT_OES, cropRect);
-
-    for(int frame = 0; frame < 2; frame++) {
-        glClear(GL_DEPTH_BUFFER_BIT | GL_COLOR_BUFFER_BIT);
-        int baseX = 10;
-        for (int x = 0; x < SCALE_COUNT; x++) {
-            int baseY = 10;
-            int width = scale(WIDTH, x);
-            for (int y = 0; y < SCALE_COUNT; y++) {
-                int height = scale(HEIGHT, y);
-                glDrawTexxOES(baseX << 16, baseY << 16, 0, width << 16, height << 16);
-                baseY += height + 10;
-            }
-            baseX += width + 10;
-        }
-
-        eglSwapBuffers(eglDisplay, eglSurface);
-        LOGD("wait 1s");
-        usleep(1000000);
-    }
-    return 0;
-}
-
-int testRot90()
-{
-    static const int WIDTH = 8;
-    static const int HEIGHT = 8;
-
-    if (create_physical_texture(WIDTH, HEIGHT) != 0) {
-        return -1;
-    }
-
-    glMatrixMode(GL_PROJECTION);
-    glLoadIdentity();
-    glOrthof(0, 320, 480, 0, 0, 1);
-
-    glMatrixMode(GL_MODELVIEW);
-
-    glLoadIdentity();
-
-    // Need to do a dummy eglSwapBuffers first. Don't know why.
-    glClearColor(0.4, 0.4, 0.4, 0.4);
-    glClear(GL_DEPTH_BUFFER_BIT | GL_COLOR_BUFFER_BIT);
-    eglSwapBuffers(eglDisplay, eglSurface);
-
-    glEnable(GL_TEXTURE_2D);
-    glTexEnvx(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
-    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
-    glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
-    glColor4x(0x10000, 0x10000, 0x10000, 0x10000);
-    glDisable(GL_BLEND);
-    glShadeModel(GL_FLAT);
-    glDisable(GL_DITHER);
-    glDisable(GL_CULL_FACE);
-
-    for(int frame = 0; frame < 2; frame++) {
-        LOGD("frame = %d", frame);
-        glClear(GL_DEPTH_BUFFER_BIT | GL_COLOR_BUFFER_BIT);
-        int baseX = 10;
-        for (int x = 0; x < SCALE_COUNT; x++) {
-            int baseY = 10;
-            int width = scale(WIDTH, x);
-            for (int y = 0; y < SCALE_COUNT; y++) {
-                int height = scale(HEIGHT, y);
-
-                // Code copied from SurfaceFlinger LayerBase.cpp
-
-                const GLfixed texCoords[4][2] = {
-                        { 0,        0 },
-                        { 0,        0x10000 },
-                        { 0x10000,  0x10000 },
-                        { 0x10000,  0 }
-                };
-
-                GLfixed fx = baseX << 16;
-                GLfixed fy = baseY << 16;
-                GLfixed fw = width << 16;
-                GLfixed fh = height << 16;
-
-                /*
-                 * Vertex pattern:
-                 *    (2)--(3)
-                 *     |\   |
-                 *     | \  |
-                 *     |  \ |
-                 *     |   \|
-                 *    (1)--(0)
-                 *
-                 */
-
-                const GLfixed vertices[4][2] = {
-                        {fx + fw, fy},
-                        {fx,      fy},
-                        {fx,      fy + fh},
-                        {fx + fw, fy + fh}
-                };
-
-                static const bool rotate90 = true;
-
-                glMatrixMode(GL_TEXTURE);
-                glLoadIdentity();
-
-                glEnableClientState(GL_VERTEX_ARRAY);
-                glEnableClientState(GL_TEXTURE_COORD_ARRAY);
-                glVertexPointer(2, GL_FIXED, 0, vertices);
-                glTexCoordPointer(2, GL_FIXED, 0, texCoords);
-
-                LOGD("testRot90 %d, %d %d, %d", baseX, baseY, width, height);
-                glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
-
-                baseY += height + 10;
-            }
-            baseX += width + 10;
-        }
-
-        eglSwapBuffers(eglDisplay, eglSurface);
-    }
-    return 0;
-}
-
-int main(int argc, char **argv)
-{
-
-    int q;
-    int start, end;
-
-    if (init_gralloc()) {
-        printf("gralloc initialization failed - exiting\n");
-        return 0;
-    }
-
-    printf("Initializing EGL...\n");
-
-    if(!init_gl_surface())
-    {
-        printf("GL initialisation failed - exiting\n");
-        return 0;
-    }
-
-    init_scene();
-
-    printf("Start test...\n");
-    // testTime();
-     testStretch();
-    //testRot90();
-    free_gl_surface();
-
-    return 0;
-}
diff --git a/opengl/tests/gralloc/Android.mk b/opengl/tests/gralloc/Android.mk
index a86c8ec..d43c39a 100644
--- a/opengl/tests/gralloc/Android.mk
+++ b/opengl/tests/gralloc/Android.mk
@@ -2,9 +2,7 @@
 include $(CLEAR_VARS)
 
 LOCAL_SRC_FILES:= \
-    gralloc.cpp \
-    Buffer.cpp \
-    BufferAllocator.cpp
+    gralloc.cpp
 
 LOCAL_SHARED_LIBRARIES := \
     libcutils \
diff --git a/opengl/tests/gralloc/Buffer.cpp b/opengl/tests/gralloc/Buffer.cpp
deleted file mode 100644
index 3920ff0..0000000
--- a/opengl/tests/gralloc/Buffer.cpp
+++ /dev/null
@@ -1,111 +0,0 @@
-/*
- * Copyright (C) 2007 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.
- */
-
-#include <stdlib.h>
-#include <stdint.h>
-#include <sys/types.h>
-
-#include <utils/Errors.h>
-#include <utils/Log.h>
-
-#include <ui/PixelFormat.h>
-#include <pixelflinger/pixelflinger.h>
-
-#include "Buffer.h"
-#include "BufferAllocator.h"
-
-
-namespace android {
-
-// ===========================================================================
-// Buffer and implementation of android_native_buffer_t
-// ===========================================================================
-
-Buffer::Buffer()
-    : SurfaceBuffer(), mInitCheck(NO_ERROR),  mVStride(0)
-{
-}
-
-Buffer::Buffer(uint32_t w, uint32_t h, PixelFormat format,
-        uint32_t reqUsage, uint32_t flags)
-    : SurfaceBuffer(), mInitCheck(NO_INIT), mVStride(0)
-{
-    mInitCheck = initSize(w, h, format, reqUsage, flags);
-}
-
-Buffer::~Buffer()
-{
-    if (handle) {
-        BufferAllocator& allocator(BufferAllocator::get());
-        allocator.free(handle);
-    }
-}
-
-status_t Buffer::initCheck() const {
-    return mInitCheck;
-}
-
-android_native_buffer_t* Buffer::getNativeBuffer() const
-{
-    return static_cast<android_native_buffer_t*>(const_cast<Buffer*>(this));
-}
-
-status_t Buffer::reallocate(uint32_t w, uint32_t h, PixelFormat f,
-        uint32_t reqUsage, uint32_t flags)
-{
-    if (handle) {
-        BufferAllocator& allocator(BufferAllocator::get());
-        allocator.free(handle);
-        handle = 0;
-    }
-    return initSize(w, h, f, reqUsage, flags);
-}
-
-status_t Buffer::initSize(uint32_t w, uint32_t h, PixelFormat format,
-        uint32_t reqUsage, uint32_t flags)
-{
-    status_t err = NO_ERROR;
-    BufferAllocator& allocator = BufferAllocator::get();
-    err = allocator.alloc(w, h, format, reqUsage, &handle, &stride);
-    if (err == NO_ERROR) {
-        this->width  = w;
-        this->height = h;
-        this->format = format;
-        mVStride = 0;
-    }
-
-    return err;
-}
-
-status_t Buffer::lock(GGLSurface* sur, uint32_t usage)
-{
-    void* vaddr;
-    status_t res = SurfaceBuffer::lock(usage, &vaddr);
-    if (res == NO_ERROR && sur) {
-        sur->version = sizeof(GGLSurface);
-        sur->width = width;
-        sur->height = height;
-        sur->stride = stride;
-        sur->format = format;
-        sur->vstride = mVStride;
-        sur->data = static_cast<GGLubyte*>(vaddr);
-    }
-    return res;
-}
-
-// ---------------------------------------------------------------------------
-
-}; // namespace android
diff --git a/opengl/tests/gralloc/Buffer.h b/opengl/tests/gralloc/Buffer.h
deleted file mode 100644
index 8a32153..0000000
--- a/opengl/tests/gralloc/Buffer.h
+++ /dev/null
@@ -1,90 +0,0 @@
-/*
- * Copyright (C) 2007 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_LAYER_BITMAP_H
-#define ANDROID_LAYER_BITMAP_H
-
-#include <stdint.h>
-#include <sys/types.h>
-
-#include <hardware/gralloc.h>
-
-#include <utils/Atomic.h>
-
-#include <private/ui/SurfaceBuffer.h>
-#include <ui/PixelFormat.h>
-#include <ui/Rect.h>
-
-#include <pixelflinger/pixelflinger.h>
-
-struct android_native_buffer_t;
-
-namespace android {
-
-// ===========================================================================
-// Buffer
-// ===========================================================================
-
-class NativeBuffer;
-
-class Buffer : public SurfaceBuffer
-{
-public:
-    enum {
-        DONT_CLEAR  = 0x00000001,
-        SECURE      = 0x00000004
-    };
-
-    Buffer();
-
-    // creates w * h buffer
-    Buffer(uint32_t w, uint32_t h, PixelFormat format,
-            uint32_t reqUsage, uint32_t flags = 0);
-
-    // return status
-    status_t initCheck() const;
-
-    uint32_t getWidth() const           { return width; }
-    uint32_t getHeight() const          { return height; }
-    uint32_t getStride() const          { return stride; }
-    uint32_t getUsage() const           { return usage; }
-    PixelFormat getPixelFormat() const  { return format; }
-    Rect getBounds() const              { return Rect(width, height); }
-
-    status_t lock(GGLSurface* surface, uint32_t usage);
-
-    android_native_buffer_t* getNativeBuffer() const;
-
-    status_t reallocate(uint32_t w, uint32_t h, PixelFormat f,
-            uint32_t reqUsage, uint32_t flags);
-
-private:
-    friend class LightRefBase<Buffer>;
-    Buffer(const Buffer& rhs);
-    virtual ~Buffer();
-    Buffer& operator = (const Buffer& rhs);
-    const Buffer& operator = (const Buffer& rhs) const;
-
-    status_t initSize(uint32_t w, uint32_t h, PixelFormat format,
-            uint32_t reqUsage, uint32_t flags);
-
-    ssize_t     mInitCheck;
-    uint32_t    mVStride;
-};
-
-}; // namespace android
-
-#endif // ANDROID_LAYER_BITMAP_H
diff --git a/opengl/tests/gralloc/BufferAllocator.cpp b/opengl/tests/gralloc/BufferAllocator.cpp
deleted file mode 100644
index caf9bec..0000000
--- a/opengl/tests/gralloc/BufferAllocator.cpp
+++ /dev/null
@@ -1,131 +0,0 @@
-/* 
-**
-** Copyright 2009, 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.
-*/
-
-#include <sys/mman.h>
-#include <cutils/ashmem.h>
-#include <cutils/log.h>
-
-#include <utils/Singleton.h>
-#include <utils/String8.h>
-
-#include "BufferAllocator.h"
-
-
-namespace android {
-// ---------------------------------------------------------------------------
-
-ANDROID_SINGLETON_STATIC_INSTANCE( BufferAllocator )
-
-Mutex BufferAllocator::sLock;
-KeyedVector<buffer_handle_t, BufferAllocator::alloc_rec_t> BufferAllocator::sAllocList;
-
-BufferAllocator::BufferAllocator()
-    : mAllocDev(0)
-{
-    hw_module_t const* module;
-    int err = hw_get_module(GRALLOC_HARDWARE_MODULE_ID, &module);
-    LOGE_IF(err, "FATAL: can't find the %s module", GRALLOC_HARDWARE_MODULE_ID);
-    if (err == 0) {
-        gralloc_open(module, &mAllocDev);
-    }
-}
-
-BufferAllocator::~BufferAllocator()
-{
-    gralloc_close(mAllocDev);
-}
-
-void BufferAllocator::dump(String8& result) const
-{
-    Mutex::Autolock _l(sLock);
-    KeyedVector<buffer_handle_t, alloc_rec_t>& list(sAllocList);
-    size_t total = 0;
-    const size_t SIZE = 512;
-    char buffer[SIZE];
-    snprintf(buffer, SIZE, "Allocated buffers:\n");
-    result.append(buffer);
-    const size_t c = list.size();
-    for (size_t i=0 ; i<c ; i++) {
-        const alloc_rec_t& rec(list.valueAt(i));
-        snprintf(buffer, SIZE, "%10p: %7.2f KiB | %4u x %4u | %2d | 0x%08x\n",
-            list.keyAt(i), rec.size/1024.0f, 
-            rec.w, rec.h, rec.format, rec.usage);
-        result.append(buffer);
-        total += rec.size;
-    }
-    snprintf(buffer, SIZE, "Total allocated: %.2f KB\n", total/1024.0f);
-    result.append(buffer);
-}
-
-static inline uint32_t clamp(uint32_t c) {
-    return c>0 ? c : 1;
-}
-
-status_t BufferAllocator::alloc(uint32_t w, uint32_t h, PixelFormat format,
-        int usage, buffer_handle_t* handle, int32_t* stride)
-{
-    Mutex::Autolock _l(mLock);
-
-    // make sure to not allocate a 0 x 0 buffer
-    w = clamp(w);
-    h = clamp(h);
-
-    // we have a h/w allocator and h/w buffer is requested
-    status_t err = mAllocDev->alloc(mAllocDev,
-            w, h, format, usage, handle, stride);
-
-    LOGW_IF(err, "alloc(%u, %u, %d, %08x, ...) failed %d (%s)",
-            w, h, format, usage, err, strerror(-err));
-    
-    if (err == NO_ERROR) {
-        Mutex::Autolock _l(sLock);
-        KeyedVector<buffer_handle_t, alloc_rec_t>& list(sAllocList);
-        alloc_rec_t rec;
-        rec.w = w;
-        rec.h = h;
-        rec.format = format;
-        rec.usage = usage;
-        rec.vaddr = 0;
-        rec.size = h * stride[0] * bytesPerPixel(format);
-        list.add(*handle, rec);
-    } else {
-        String8 s;
-        dump(s);
-        LOGD("%s", s.string());
-    }
-
-    return err;
-}
-
-status_t BufferAllocator::free(buffer_handle_t handle)
-{
-    Mutex::Autolock _l(mLock);
-
-    status_t err = mAllocDev->free(mAllocDev, handle);
-    LOGW_IF(err, "free(...) failed %d (%s)", err, strerror(-err));
-    
-    if (err == NO_ERROR) {
-        Mutex::Autolock _l(sLock);
-        KeyedVector<buffer_handle_t, alloc_rec_t>& list(sAllocList);
-        list.removeItem(handle);
-    }
-
-    return err;
-}
-
-// ---------------------------------------------------------------------------
-}; // namespace android
diff --git a/opengl/tests/gralloc/BufferAllocator.h b/opengl/tests/gralloc/BufferAllocator.h
deleted file mode 100644
index a279ded..0000000
--- a/opengl/tests/gralloc/BufferAllocator.h
+++ /dev/null
@@ -1,96 +0,0 @@
-/* 
-**
-** Copyright 2009, 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_BUFFER_ALLOCATOR_H
-#define ANDROID_BUFFER_ALLOCATOR_H
-
-#include <stdint.h>
-
-#include <cutils/native_handle.h>
-
-#include <utils/Errors.h>
-#include <utils/KeyedVector.h>
-#include <utils/threads.h>
-#include <utils/Singleton.h>
-
-#include <ui/PixelFormat.h>
-
-#include <hardware/gralloc.h>
-
-
-namespace android {
-// ---------------------------------------------------------------------------
-
-class String8;
-
-class BufferAllocator : public Singleton<BufferAllocator>
-{
-public:
-    enum {
-        USAGE_SW_READ_NEVER     = GRALLOC_USAGE_SW_READ_NEVER,
-        USAGE_SW_READ_RARELY    = GRALLOC_USAGE_SW_READ_RARELY,
-        USAGE_SW_READ_OFTEN     = GRALLOC_USAGE_SW_READ_OFTEN,
-        USAGE_SW_READ_MASK      = GRALLOC_USAGE_SW_READ_MASK,
-        
-        USAGE_SW_WRITE_NEVER    = GRALLOC_USAGE_SW_WRITE_NEVER,
-        USAGE_SW_WRITE_RARELY   = GRALLOC_USAGE_SW_WRITE_RARELY,
-        USAGE_SW_WRITE_OFTEN    = GRALLOC_USAGE_SW_WRITE_OFTEN,
-        USAGE_SW_WRITE_MASK     = GRALLOC_USAGE_SW_WRITE_MASK,
-        
-        USAGE_SOFTWARE_MASK     = USAGE_SW_READ_MASK|USAGE_SW_WRITE_MASK,
-        
-        USAGE_HW_TEXTURE        = GRALLOC_USAGE_HW_TEXTURE,
-        USAGE_HW_RENDER         = GRALLOC_USAGE_HW_RENDER,
-        USAGE_HW_2D             = GRALLOC_USAGE_HW_2D,
-        USAGE_HW_MASK           = GRALLOC_USAGE_HW_MASK
-    };
-
-    static inline BufferAllocator& get() { return getInstance(); }
-    
-
-    status_t alloc(uint32_t w, uint32_t h, PixelFormat format, int usage,
-            buffer_handle_t* handle, int32_t* stride);
-
-    status_t free(buffer_handle_t handle);
-
-    void dump(String8& res) const;
-
-private:
-    struct alloc_rec_t {
-        uint32_t w;
-        uint32_t h;
-        PixelFormat format;
-        uint32_t usage;
-        void* vaddr;
-        size_t size;
-    };
-    
-    static Mutex sLock;
-    static KeyedVector<buffer_handle_t, alloc_rec_t> sAllocList;
-    
-    friend class Singleton<BufferAllocator>;
-    BufferAllocator();
-    ~BufferAllocator();
-    
-    mutable Mutex mLock;
-    alloc_device_t  *mAllocDev;
-};
-
-// ---------------------------------------------------------------------------
-}; // namespace android
-
-#endif // ANDROID_BUFFER_ALLOCATOR_H
diff --git a/opengl/tests/gralloc/gralloc.cpp b/opengl/tests/gralloc/gralloc.cpp
index d989bb2..8987040 100644
--- a/opengl/tests/gralloc/gralloc.cpp
+++ b/opengl/tests/gralloc/gralloc.cpp
@@ -22,8 +22,8 @@
 #include <utils/StopWatch.h>
 #include <utils/Log.h>
 
-#include "Buffer.h"
-#include <ui/BufferMapper.h>
+#include <ui/GraphicBuffer.h>
+#include <ui/GraphicBufferMapper.h>
 
 using namespace android;
 
@@ -46,7 +46,7 @@
     memset(temp2, 0, size);
 
 
-    sp<Buffer> buffer = new Buffer(128, 256, HAL_PIXEL_FORMAT_RGBA_8888,
+    sp<GraphicBuffer> buffer = new GraphicBuffer(128, 256, HAL_PIXEL_FORMAT_RGBA_8888,
             GRALLOC_USAGE_SW_READ_OFTEN |
             GRALLOC_USAGE_SW_WRITE_OFTEN);
 
@@ -57,7 +57,7 @@
     }
 
     void* vaddr;
-    buffer->SurfaceBuffer::lock(
+    buffer->lock(
             GRALLOC_USAGE_SW_READ_OFTEN | GRALLOC_USAGE_SW_WRITE_OFTEN,
             &vaddr);