diff --git a/libs/ui/ISurface.cpp b/libs/ui/ISurface.cpp
new file mode 100644
index 0000000..d5e9f81
--- /dev/null
+++ b/libs/ui/ISurface.cpp
@@ -0,0 +1,164 @@
+/*
+ * 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 <stdio.h>
+#include <stdint.h>
+#include <sys/types.h>
+
+#include <utils/Parcel.h>
+#include <utils/IMemory.h>
+
+#include <ui/ISurface.h>
+#include <ui/Overlay.h>
+
+
+namespace android {
+
+ISurface::BufferHeap::BufferHeap() 
+    : w(0), h(0), hor_stride(0), ver_stride(0), format(0),
+    transform(0), flags(0) 
+{     
+}
+
+ISurface::BufferHeap::BufferHeap(uint32_t w, uint32_t h,
+        int32_t hor_stride, int32_t ver_stride,
+        PixelFormat format, const sp<IMemoryHeap>& heap)
+    : w(w), h(h), hor_stride(hor_stride), ver_stride(ver_stride),
+      format(format), transform(0), flags(0), heap(heap) 
+{
+}
+
+ISurface::BufferHeap::BufferHeap(uint32_t w, uint32_t h,
+        int32_t hor_stride, int32_t ver_stride,
+        PixelFormat format, uint32_t transform, uint32_t flags,
+        const sp<IMemoryHeap>& heap)
+        : w(w), h(h), hor_stride(hor_stride), ver_stride(ver_stride),
+          format(format), transform(transform), flags(flags), heap(heap) 
+{
+}
+
+
+ISurface::BufferHeap::~BufferHeap() 
+{     
+}
+
+class BpSurface : public BpInterface<ISurface>
+{
+public:
+    BpSurface(const sp<IBinder>& impl)
+        : BpInterface<ISurface>(impl)
+    {
+    }
+
+    virtual status_t registerBuffers(const BufferHeap& buffers)
+    {
+        Parcel data, reply;
+        data.writeInterfaceToken(ISurface::getInterfaceDescriptor());
+        data.writeInt32(buffers.w);
+        data.writeInt32(buffers.h);
+        data.writeInt32(buffers.hor_stride);
+        data.writeInt32(buffers.ver_stride);
+        data.writeInt32(buffers.format);
+        data.writeInt32(buffers.transform);
+        data.writeInt32(buffers.flags);
+        data.writeStrongBinder(buffers.heap->asBinder());
+        remote()->transact(REGISTER_BUFFERS, data, &reply);
+        status_t result = reply.readInt32();
+        return result;
+    }
+
+    virtual void postBuffer(ssize_t offset)
+    {
+        Parcel data, reply;
+        data.writeInterfaceToken(ISurface::getInterfaceDescriptor());
+        data.writeInt32(offset);
+        remote()->transact(POST_BUFFER, data, &reply, IBinder::FLAG_ONEWAY);
+    }
+
+    virtual void unregisterBuffers()
+    {
+        Parcel data, reply;
+        data.writeInterfaceToken(ISurface::getInterfaceDescriptor());
+        remote()->transact(UNREGISTER_BUFFERS, data, &reply);
+    }
+
+    virtual sp<OverlayRef> createOverlay(
+             uint32_t w, uint32_t h, int32_t format)
+    {
+        Parcel data, reply;
+        data.writeInterfaceToken(ISurface::getInterfaceDescriptor());
+        data.writeInt32(w);
+        data.writeInt32(h);
+        data.writeInt32(format);
+        remote()->transact(CREATE_OVERLAY, data, &reply);
+        return OverlayRef::readFromParcel(reply);
+    }
+};
+
+IMPLEMENT_META_INTERFACE(Surface, "android.ui.ISurface");
+
+// ----------------------------------------------------------------------
+
+#define CHECK_INTERFACE(interface, data, reply) \
+        do { if (!data.enforceInterface(interface::getInterfaceDescriptor())) { \
+            LOGW("Call incorrectly routed to " #interface); \
+            return PERMISSION_DENIED; \
+        } } while (0)
+
+status_t BnSurface::onTransact(
+    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
+{
+    switch(code) {
+        case REGISTER_BUFFERS: {
+            CHECK_INTERFACE(ISurface, data, reply);
+            BufferHeap buffer;
+            buffer.w = data.readInt32();
+            buffer.h = data.readInt32();
+            buffer.hor_stride = data.readInt32();
+            buffer.ver_stride= data.readInt32();
+            buffer.format = data.readInt32();
+            buffer.transform = data.readInt32();
+            buffer.flags = data.readInt32();
+            buffer.heap = interface_cast<IMemoryHeap>(data.readStrongBinder());
+            status_t err = registerBuffers(buffer);
+            reply->writeInt32(err);
+            return NO_ERROR;
+        } break;
+        case UNREGISTER_BUFFERS: {
+            CHECK_INTERFACE(ISurface, data, reply);
+            unregisterBuffers();
+            return NO_ERROR;
+        } break;
+        case POST_BUFFER: {
+            CHECK_INTERFACE(ISurface, data, reply);
+            ssize_t offset = data.readInt32();
+            postBuffer(offset);
+            return NO_ERROR;
+        } break;
+        case CREATE_OVERLAY: {
+            CHECK_INTERFACE(ISurface, data, reply);
+            int w = data.readInt32();
+            int h = data.readInt32();
+            int f = data.readInt32();
+            sp<OverlayRef> o = createOverlay(w, h, f);
+            return OverlayRef::writeToParcel(reply, o);
+        } break;
+        default:
+            return BBinder::onTransact(code, data, reply, flags);
+    }
+}
+
+}; // namespace android