diff --git a/libs/ui/Surface.cpp b/libs/ui/Surface.cpp
new file mode 100644
index 0000000..4ea9ae2
--- /dev/null
+++ b/libs/ui/Surface.cpp
@@ -0,0 +1,256 @@
+/*
+ * 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 "Surface"
+
+#include <stdint.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+
+#include <utils/Atomic.h>
+#include <utils/Errors.h>
+#include <utils/threads.h>
+#include <utils/IPCThreadState.h>
+#include <utils/IMemory.h>
+#include <utils/Log.h>
+
+#include <ui/ISurface.h>
+#include <ui/Surface.h>
+#include <ui/SurfaceComposerClient.h>
+#include <ui/Rect.h>
+
+#include <private/ui/SharedState.h>
+#include <private/ui/LayerState.h>
+
+namespace android {
+
+// ---------------------------------------------------------------------------
+
+Surface::Surface(const sp<SurfaceComposerClient>& client, 
+        const sp<ISurface>& surface,
+        const ISurfaceFlingerClient::surface_data_t& data,
+        uint32_t w, uint32_t h, PixelFormat format, uint32_t flags,
+        bool owner)
+    : mClient(client), mSurface(surface),
+      mToken(data.token), mIdentity(data.identity),
+      mFormat(format), mFlags(flags), mOwner(owner)
+{
+    mSwapRectangle.makeInvalid();
+    mSurfaceHeapBase[0] = 0;
+    mSurfaceHeapBase[1] = 0;
+    mHeap[0] = data.heap[0]; 
+    mHeap[1] = data.heap[1];
+}
+
+Surface::Surface(Surface const* rhs)
+    : mOwner(false)
+{
+    mToken   = rhs->mToken;
+    mIdentity= rhs->mIdentity;
+    mClient  = rhs->mClient;
+    mSurface = rhs->mSurface;
+    mHeap[0] = rhs->mHeap[0];
+    mHeap[1] = rhs->mHeap[1];
+    mFormat  = rhs->mFormat;
+    mFlags   = rhs->mFlags;
+    mSurfaceHeapBase[0] = rhs->mSurfaceHeapBase[0];
+    mSurfaceHeapBase[1] = rhs->mSurfaceHeapBase[1];
+    mSwapRectangle.makeInvalid();
+}
+
+Surface::~Surface()
+{
+    if (mOwner && mToken>=0 && mClient!=0) {
+        mClient->destroySurface(mToken);
+    }
+    mClient.clear();
+    mSurface.clear();
+    mHeap[0].clear();
+    mHeap[1].clear();
+    IPCThreadState::self()->flushCommands();
+}
+
+sp<Surface> Surface::dup() const
+{
+    Surface const * r = this;
+    if (this && mOwner) {
+        // the only reason we need to do this is because of Java's garbage
+        // collector: because we're creating a copy of the Surface
+        // instead of a reference, we can garantee that when our last
+        // reference goes away, the real surface will be deleted.
+        // Without this hack (the code is correct too), we'd have to
+        // wait for a GC for the surface to go away.
+        r = new Surface(this);        
+    }
+    return const_cast<Surface*>(r);
+}
+
+status_t Surface::nextBuffer(SurfaceInfo* info) {
+    return mClient->nextBuffer(this, info);
+}
+
+status_t Surface::lock(SurfaceInfo* info, bool blocking) {
+    return Surface::lock(info, NULL, blocking);
+}
+
+status_t Surface::lock(SurfaceInfo* info, Region* dirty, bool blocking) {
+    if (heapBase(0) == 0) return INVALID_OPERATION;
+    if (heapBase(1) == 0) return INVALID_OPERATION;
+    return mClient->lockSurface(this, info, dirty, blocking);
+}
+
+status_t Surface::unlockAndPost() {
+    if (heapBase(0) == 0) return INVALID_OPERATION;
+    if (heapBase(1) == 0) return INVALID_OPERATION;
+    return mClient->unlockAndPostSurface(this);
+}
+
+status_t Surface::unlock() {
+    if (heapBase(0) == 0) return INVALID_OPERATION;
+    if (heapBase(1) == 0) return INVALID_OPERATION;
+    return mClient->unlockSurface(this);
+}
+
+status_t Surface::setLayer(int32_t layer) {
+    return mClient->setLayer(this, layer);
+}
+status_t Surface::setPosition(int32_t x, int32_t y) {
+    return mClient->setPosition(this, x, y);
+}
+status_t Surface::setSize(uint32_t w, uint32_t h) {
+    return mClient->setSize(this, w, h);
+}
+status_t Surface::hide() {
+    return mClient->hide(this);
+}
+status_t Surface::show(int32_t layer) {
+    return mClient->show(this, layer);
+}
+status_t Surface::freeze() {
+    return mClient->freeze(this);
+}
+status_t Surface::unfreeze() {
+    return mClient->unfreeze(this);
+}
+status_t Surface::setFlags(uint32_t flags, uint32_t mask) {
+    return mClient->setFlags(this, flags, mask);
+}
+status_t Surface::setTransparentRegionHint(const Region& transparent) {
+    return mClient->setTransparentRegionHint(this, transparent);
+}
+status_t Surface::setAlpha(float alpha) {
+    return mClient->setAlpha(this, alpha);
+}
+status_t Surface::setMatrix(float dsdx, float dtdx, float dsdy, float dtdy) {
+    return mClient->setMatrix(this, dsdx, dtdx, dsdy, dtdy);
+}
+status_t Surface::setFreezeTint(uint32_t tint) {
+    return mClient->setFreezeTint(this, tint);
+}
+
+Region Surface::dirtyRegion() const  {
+    return mDirtyRegion; 
+}
+void Surface::setDirtyRegion(const Region& region) const {
+    mDirtyRegion = region;
+}
+const Rect& Surface::swapRectangle() const {
+    return mSwapRectangle;
+}
+void Surface::setSwapRectangle(const Rect& r) {
+    mSwapRectangle = r;
+}
+
+sp<Surface> Surface::readFromParcel(Parcel* parcel)
+{
+    sp<SurfaceComposerClient> client;
+    ISurfaceFlingerClient::surface_data_t data;
+    sp<IBinder> clientBinder= parcel->readStrongBinder();
+    sp<ISurface> surface    = interface_cast<ISurface>(parcel->readStrongBinder());
+    data.heap[0]            = interface_cast<IMemoryHeap>(parcel->readStrongBinder());
+    data.heap[1]            = interface_cast<IMemoryHeap>(parcel->readStrongBinder());
+    data.token              = parcel->readInt32();
+    data.identity           = parcel->readInt32();
+    PixelFormat format      = parcel->readInt32();
+    uint32_t flags          = parcel->readInt32();
+
+    if (clientBinder != NULL)
+        client = SurfaceComposerClient::clientForConnection(clientBinder);
+
+    return new Surface(client, surface, data, 0, 0, format, flags, false);
+}
+
+status_t Surface::writeToParcel(const sp<Surface>& surface, Parcel* parcel)
+{
+    uint32_t flags=0;
+    uint32_t format=0;
+    SurfaceID token = -1;
+    uint32_t identity = 0;
+    sp<SurfaceComposerClient> client;
+    sp<ISurface> sur;
+    sp<IMemoryHeap> heap[2];
+    if (surface->isValid()) {
+        token = surface->mToken;
+        identity = surface->mIdentity;
+        client = surface->mClient;
+        sur = surface->mSurface;
+        heap[0] = surface->mHeap[0];
+        heap[1] = surface->mHeap[1];
+        format = surface->mFormat;
+        flags = surface->mFlags;
+    }
+    parcel->writeStrongBinder(client!=0  ? client->connection() : NULL);
+    parcel->writeStrongBinder(sur!=0     ? sur->asBinder()      : NULL);
+    parcel->writeStrongBinder(heap[0]!=0 ? heap[0]->asBinder()  : NULL);
+    parcel->writeStrongBinder(heap[1]!=0 ? heap[1]->asBinder()  : NULL);
+    parcel->writeInt32(token);
+    parcel->writeInt32(identity);
+    parcel->writeInt32(format);
+    parcel->writeInt32(flags);
+    return NO_ERROR;
+}
+
+bool Surface::isSameSurface(const sp<Surface>& lhs, const sp<Surface>& rhs) 
+{
+    if (lhs == 0 || rhs == 0)
+        return false;
+    return lhs->mSurface->asBinder() == rhs->mSurface->asBinder();
+}
+
+void* Surface::heapBase(int i) const 
+{
+    void* heapBase = mSurfaceHeapBase[i];
+    // map lazily so it doesn't get mapped in clients that don't need it
+    if (heapBase == 0) {
+        const sp<IMemoryHeap>& heap(mHeap[i]);
+        if (heap != 0) {
+            heapBase = static_cast<uint8_t*>(heap->base());
+            if (heapBase == MAP_FAILED) {
+                heapBase = NULL;
+                LOGE("Couldn't map Surface's heap (binder=%p, heap=%p)",
+                        heap->asBinder().get(), heap.get());
+            }
+            mSurfaceHeapBase[i] = heapBase;
+        }
+    }
+    return heapBase;
+}
+
+}; // namespace android
+