diff --git a/include/surfaceflinger/ISurface.h b/include/surfaceflinger/ISurface.h
new file mode 100644
index 0000000..472f759
--- /dev/null
+++ b/include/surfaceflinger/ISurface.h
@@ -0,0 +1,112 @@
+/*
+ * 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_SF_ISURFACE_H
+#define ANDROID_SF_ISURFACE_H
+
+#include <stdint.h>
+#include <sys/types.h>
+
+#include <utils/Errors.h>
+#include <utils/RefBase.h>
+
+#include <binder/IInterface.h>
+
+#include <ui/PixelFormat.h>
+
+#include <hardware/hardware.h>
+#include <hardware/gralloc.h>
+
+namespace android {
+
+typedef int32_t    SurfaceID;
+
+class IMemoryHeap;
+class OverlayRef;
+class GraphicBuffer;
+
+class ISurface : public IInterface
+{
+protected:
+    enum {
+        REGISTER_BUFFERS = IBinder::FIRST_CALL_TRANSACTION,
+        UNREGISTER_BUFFERS,
+        POST_BUFFER, // one-way transaction
+        CREATE_OVERLAY,
+        REQUEST_BUFFER,
+    };
+
+public: 
+    DECLARE_META_INTERFACE(Surface);
+
+    virtual sp<GraphicBuffer> requestBuffer(int bufferIdx, int usage) = 0; 
+    
+    class BufferHeap {
+    public:
+        enum {
+            /* rotate source image */
+            ROT_0     = 0,
+            ROT_90    = HAL_TRANSFORM_ROT_90,
+            ROT_180   = HAL_TRANSFORM_ROT_180,
+            ROT_270   = HAL_TRANSFORM_ROT_270,
+        };
+        BufferHeap();
+        
+        BufferHeap(uint32_t w, uint32_t h,
+                int32_t hor_stride, int32_t ver_stride, 
+                PixelFormat format, const sp<IMemoryHeap>& heap);
+        
+        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);
+        
+        ~BufferHeap(); 
+        
+        uint32_t w;
+        uint32_t h;
+        int32_t hor_stride;
+        int32_t ver_stride;
+        PixelFormat format;
+        uint32_t transform;
+        uint32_t flags;
+        sp<IMemoryHeap> heap;
+    };
+    
+    virtual status_t registerBuffers(const BufferHeap& buffers) = 0;
+    virtual void postBuffer(ssize_t offset) = 0; // one-way
+    virtual void unregisterBuffers() = 0;
+    
+    virtual sp<OverlayRef> createOverlay(
+            uint32_t w, uint32_t h, int32_t format, int32_t orientation) = 0;
+};
+
+// ----------------------------------------------------------------------------
+
+class BnSurface : public BnInterface<ISurface>
+{
+public:
+    virtual status_t    onTransact( uint32_t code,
+                                    const Parcel& data,
+                                    Parcel* reply,
+                                    uint32_t flags = 0);
+};
+
+// ----------------------------------------------------------------------------
+
+}; // namespace android
+
+#endif // ANDROID_SF_ISURFACE_H