diff --git a/include/gui/ISurfaceTexture.h b/include/gui/ISurfaceTexture.h
new file mode 100644
index 0000000..77d37f1
--- /dev/null
+++ b/include/gui/ISurfaceTexture.h
@@ -0,0 +1,91 @@
+/*
+ * Copyright (C) 2010 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_GUI_ISURFACETEXTURE_H
+#define ANDROID_GUI_ISURFACETEXTURE_H
+
+#include <stdint.h>
+#include <sys/types.h>
+
+#include <utils/Errors.h>
+#include <utils/RefBase.h>
+
+#include <binder/IInterface.h>
+
+#include <ui/GraphicBuffer.h>
+#include <ui/Rect.h>
+
+namespace android {
+// ----------------------------------------------------------------------------
+
+class ISurfaceTexture : public IInterface
+{
+public:
+    DECLARE_META_INTERFACE(SurfaceTexture);
+
+    // requestBuffer requests a new buffer for the given index. The server (i.e.
+    // the ISurfaceTexture implementation) assigns the newly created buffer to
+    // the given slot index, and the client is expected to mirror the
+    // slot->buffer mapping so that it's not necessary to transfer a
+    // GraphicBuffer for every dequeue operation.
+    virtual sp<GraphicBuffer> requestBuffer(int slot, uint32_t w, uint32_t h,
+            uint32_t format, uint32_t usage) = 0;
+
+    // setBufferCount sets the number of buffer slots available. Calling this
+    // will also cause all buffer slots to be emptied. The caller should empty
+    // its mirrored copy of the buffer slots when calling this method.
+    virtual status_t setBufferCount(int bufferCount) = 0;
+
+    // dequeueBuffer requests a new buffer slot for the client to use. Ownership
+    // of the slot is transfered to the client, meaning that the server will not
+    // use the contents of the buffer associated with that slot. The slot index
+    // returned may or may not contain a buffer. If the slot is empty the client
+    // should call requestBuffer to assign a new buffer to that slot. The client
+    // is expected to either call cancelBuffer on the dequeued slot or to fill
+    // in the contents of its associated buffer contents and call queueBuffer.
+    virtual status_t dequeueBuffer(int *slot) = 0;
+
+    // queueBuffer indicates that the client has finished filling in the
+    // contents of the buffer associated with slot and transfers ownership of
+    // that slot back to the server. It is not valid to call queueBuffer on a
+    // slot that is not owned by the client or one for which a buffer associated
+    // via requestBuffer.
+    virtual status_t queueBuffer(int slot) = 0;
+
+    // cancelBuffer indicates that the client does not wish to fill in the
+    // buffer associated with slot and transfers ownership of the slot back to
+    // the server.
+    virtual void cancelBuffer(int slot) = 0;
+
+    virtual status_t setCrop(const Rect& reg) = 0;
+    virtual status_t setTransform(uint32_t transform) = 0;
+};
+
+// ----------------------------------------------------------------------------
+
+class BnSurfaceTexture : public BnInterface<ISurfaceTexture>
+{
+public:
+    virtual status_t    onTransact( uint32_t code,
+                                    const Parcel& data,
+                                    Parcel* reply,
+                                    uint32_t flags = 0);
+};
+
+// ----------------------------------------------------------------------------
+}; // namespace android
+
+#endif // ANDROID_GUI_ISURFACETEXTURE_H
diff --git a/include/gui/SurfaceTexture.h b/include/gui/SurfaceTexture.h
new file mode 100644
index 0000000..ff92e08
--- /dev/null
+++ b/include/gui/SurfaceTexture.h
@@ -0,0 +1,139 @@
+/*
+ * Copyright (C) 2010 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_GUI_SURFACETEXTURE_H
+#define ANDROID_GUI_SURFACETEXTURE_H
+
+#include <EGL/egl.h>
+#include <EGL/eglext.h>
+#include <GLES2/gl2.h>
+
+#include <gui/ISurfaceTexture.h>
+
+#include <ui/GraphicBuffer.h>
+
+#include <utils/threads.h>
+
+#define ANDROID_GRAPHICS_SURFACETEXTURE_JNI_ID "mSurfaceTexture"
+
+namespace android {
+// ----------------------------------------------------------------------------
+
+class SurfaceTexture : public BnSurfaceTexture {
+public:
+    enum { MIN_BUFFER_SLOTS = 3 };
+    enum { NUM_BUFFER_SLOTS = 32 };
+
+    // tex indicates the name OpenGL texture to which images are to be streamed.
+    // This texture name cannot be changed once the SurfaceTexture is created.
+    SurfaceTexture(GLuint tex);
+
+    virtual ~SurfaceTexture();
+
+    // setBufferCount updates the number of available buffer slots.  After
+    // calling this all buffer slots are both unallocated and owned by the
+    // SurfaceTexture object (i.e. they are not owned by the client).
+    virtual status_t setBufferCount(int bufferCount);
+
+    virtual sp<GraphicBuffer> requestBuffer(int buf, uint32_t w, uint32_t h,
+            uint32_t format, uint32_t usage);
+
+    // dequeueBuffer gets the next buffer slot index for the client to use. If a
+    // buffer slot is available then that slot index is written to the location
+    // pointed to by the buf argument and a status of OK is returned.  If no
+    // slot is available then a status of -EBUSY is returned and buf is
+    // unmodified.
+    virtual status_t dequeueBuffer(int *buf);
+
+    virtual status_t queueBuffer(int buf);
+    virtual void cancelBuffer(int buf);
+    virtual status_t setCrop(const Rect& reg);
+    virtual status_t setTransform(uint32_t transform);
+
+    // updateTexImage sets the image contents of the target texture to that of
+    // the most recently queued buffer.
+    //
+    // This call may only be made while the OpenGL ES context to which the
+    // target texture belongs is bound to the calling thread.
+    status_t updateTexImage();
+
+private:
+
+    // freeAllBuffers frees the resources (both GraphicBuffer and EGLImage) for
+    // all slots.
+    void freeAllBuffers();
+
+    // createImage creates a new EGLImage from a GraphicBuffer.
+    EGLImageKHR createImage(EGLDisplay dpy,
+            const sp<GraphicBuffer>& graphicBuffer);
+
+    enum { INVALID_BUFFER_SLOT = -1 };
+
+    struct BufferSlot {
+        // mGraphicBuffer points to the buffer allocated for this slot or is NULL
+        // if no buffer has been allocated.
+        sp<GraphicBuffer> mGraphicBuffer;
+
+        // mEglImage is the EGLImage created from mGraphicBuffer.
+        EGLImageKHR mEglImage;
+
+        // mEglDisplay is the EGLDisplay used to create mEglImage.
+        EGLDisplay mEglDisplay;
+
+        // mOwnedByClient indicates whether the slot is currently accessible to a
+        // client and should not be used by the SurfaceTexture object. It gets
+        // set to true when dequeueBuffer returns the slot and is reset to false
+        // when the client calls either queueBuffer or cancelBuffer on the slot.
+        bool mOwnedByClient;
+    };
+
+    // mSlots is the array of buffer slots that must be mirrored on the client
+    // side. This allows buffer ownership to be transferred between the client
+    // and server without sending a GraphicBuffer over binder. The entire array
+    // is initialized to NULL at construction time, and buffers are allocated
+    // for a slot when requestBuffer is called with that slot's index.
+    BufferSlot mSlots[NUM_BUFFER_SLOTS];
+
+    // mBufferCount is the number of buffer slots that the client and server
+    // must maintain. It defaults to MIN_BUFFER_SLOTS and can be changed by
+    // calling setBufferCount.
+    int mBufferCount;
+
+    // mCurrentTexture is the buffer slot index of the buffer that is currently
+    // bound to the OpenGL texture. A value of INVALID_BUFFER_SLOT, indicating
+    // that no buffer is currently bound to the texture.
+    int mCurrentTexture;
+
+    // mLastQueued is the buffer slot index of the most recently enqueued buffer.
+    // At construction time it is initialized to INVALID_BUFFER_SLOT, and is
+    // updated each time queueBuffer is called.
+    int mLastQueued;
+
+    // mTexName is the name of the OpenGL texture to which streamed images will
+    // be bound when updateTexImage is called. It is set at construction time 
+    // changed with a call to setTexName.
+    const GLuint mTexName;
+
+    // mMutex is the mutex used to prevent concurrent access to the member
+    // variables of SurfaceTexture objects. It must be locked whenever the
+    // member variables are accessed.
+    Mutex mMutex;
+};
+
+// ----------------------------------------------------------------------------
+}; // namespace android
+
+#endif // ANDROID_GUI_SURFACETEXTURE_H
diff --git a/include/gui/SurfaceTextureClient.h b/include/gui/SurfaceTextureClient.h
new file mode 100644
index 0000000..dd1d490
--- /dev/null
+++ b/include/gui/SurfaceTextureClient.h
@@ -0,0 +1,118 @@
+/*
+ * Copyright (C) 2010 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_GUI_SURFACETEXTURECLIENT_H
+#define ANDROID_GUI_SURFACETEXTURECLIENT_H
+
+#include <gui/ISurfaceTexture.h>
+#include <gui/SurfaceTexture.h>
+
+#include <ui/egl/android_natives.h>
+
+#include <utils/RefBase.h>
+#include <utils/threads.h>
+
+namespace android {
+
+class SurfaceTextureClient
+    : public EGLNativeBase<ANativeWindow, SurfaceTextureClient, RefBase>
+{
+public:
+    SurfaceTextureClient(const sp<ISurfaceTexture>& surfaceTexture);
+
+private:
+
+    // can't be copied
+    SurfaceTextureClient& operator = (const SurfaceTextureClient& rhs);
+    SurfaceTextureClient(const SurfaceTextureClient& rhs);
+
+    // ANativeWindow hooks
+    static int setSwapInterval(ANativeWindow* window, int interval);
+    static int dequeueBuffer(ANativeWindow* window, android_native_buffer_t** buffer);
+    static int cancelBuffer(ANativeWindow* window, android_native_buffer_t* buffer);
+    static int lockBuffer(ANativeWindow* window, android_native_buffer_t* buffer);
+    static int queueBuffer(ANativeWindow* window, android_native_buffer_t* buffer);
+    static int query(ANativeWindow* window, int what, int* value);
+    static int perform(ANativeWindow* window, int operation, ...);
+
+    int setSwapInterval(int interval);
+    int dequeueBuffer(android_native_buffer_t** buffer);
+    int lockBuffer(android_native_buffer_t* buffer);
+    int queueBuffer(android_native_buffer_t* buffer);
+    int cancelBuffer(android_native_buffer_t* buffer);
+    int query(int what, int* value);
+    int perform(int operation, va_list args);
+
+    int dispatchSetUsage(va_list args);
+    int dispatchConnect(va_list args);
+    int dispatchDisconnect(va_list args);
+    int dispatchSetCrop(va_list args);
+    int dispatchSetBufferCount(va_list args);
+    int dispatchSetBuffersGeometry(va_list args);
+    int dispatchSetBuffersTransform(va_list args);
+
+    int connect(int api);
+    int disconnect(int api);
+    int setUsage(uint32_t reqUsage);
+    int setCrop(Rect const* rect);
+    int setBufferCount(int bufferCount);
+    int setBuffersGeometry(int w, int h, int format);
+    int setBuffersTransform(int transform);
+
+    void freeAllBuffers();
+
+    enum { MIN_BUFFER_SLOTS = SurfaceTexture::MIN_BUFFER_SLOTS };
+    enum { NUM_BUFFER_SLOTS = SurfaceTexture::NUM_BUFFER_SLOTS };
+    enum { DEFAULT_FORMAT = PIXEL_FORMAT_RGBA_8888 };
+
+    // mSurfaceTexture is the interface to the surface texture server. All
+    // operations on the surface texture client ultimately translate into
+    // interactions with the server using this interface.
+    sp<ISurfaceTexture> mSurfaceTexture;
+
+    // mSlots stores the buffers that have been allocated for each buffer slot.
+    // It is initialized to null pointers, and gets filled in with the result of
+    // ISurfaceTexture::requestBuffer when the client dequeues a buffer from a
+    // slot that has not yet been used. The buffer allocated to a slot will also
+    // be replaced if the requested buffer usage or geometry differs from that
+    // of the buffer allocated to a slot.
+    sp<GraphicBuffer> mSlots[NUM_BUFFER_SLOTS];
+
+    // mReqWidth is the buffer width that will be requested at the next dequeue
+    // operation. It is initialized to 1.
+    uint32_t mReqWidth;
+
+    // mReqHeight is the buffer height that will be requested at the next deuque
+    // operation. It is initialized to 1.
+    uint32_t mReqHeight;
+
+    // mReqFormat is the buffer pixel format that will be requested at the next
+    // deuque operation. It is initialized to PIXEL_FORMAT_RGBA_8888.
+    uint32_t mReqFormat;
+
+    // mReqUsage is the set of buffer usage flags that will be requested
+    // at the next deuque operation. It is initialized to 0.
+    uint32_t mReqUsage;
+
+    // mMutex is the mutex used to prevent concurrent access to the member
+    // variables of SurfaceTexture objects. It must be locked whenever the
+    // member variables are accessed.
+    Mutex mMutex;
+};
+
+}; // namespace android
+
+#endif  // ANDROID_GUI_SURFACETEXTURECLIENT_H
diff --git a/include/ui/GraphicBuffer.h b/include/ui/GraphicBuffer.h
index aa65d93..8b256f4 100644
--- a/include/ui/GraphicBuffer.h
+++ b/include/ui/GraphicBuffer.h
@@ -121,6 +121,7 @@
     friend class Surface;
     friend class BpSurface;
     friend class BnSurface;
+    friend class SurfaceTextureClient;
     friend class LightRefBase<GraphicBuffer>;
     GraphicBuffer(const GraphicBuffer& rhs);
     GraphicBuffer& operator = (const GraphicBuffer& rhs);
diff --git a/libs/gui/Android.mk b/libs/gui/Android.mk
index 249558a..d1a6af1 100644
--- a/libs/gui/Android.mk
+++ b/libs/gui/Android.mk
@@ -4,17 +4,25 @@
 LOCAL_SRC_FILES:= \
 	ISensorEventConnection.cpp \
 	ISensorServer.cpp \
+	ISurfaceTexture.cpp \
 	Sensor.cpp \
 	SensorChannel.cpp \
 	SensorEventQueue.cpp \
-	SensorManager.cpp
+	SensorManager.cpp \
+	SurfaceTexture.cpp \
+	SurfaceTextureClient.cpp
 
 LOCAL_SHARED_LIBRARIES := \
 	libcutils \
 	libutils \
 	libbinder \
 	libhardware \
-	libhardware_legacy
+	libhardware_legacy \
+	libui \
+	libEGL \
+	libGLESv2 \
+	libsurfaceflinger_client
+
 
 LOCAL_MODULE:= libgui
 
diff --git a/libs/gui/ISurfaceTexture.cpp b/libs/gui/ISurfaceTexture.cpp
new file mode 100644
index 0000000..90bca3c
--- /dev/null
+++ b/libs/gui/ISurfaceTexture.cpp
@@ -0,0 +1,204 @@
+/*
+ * Copyright (C) 2010 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 <sys/types.h>
+
+#include <utils/Errors.h>
+#include <utils/RefBase.h>
+#include <utils/Vector.h>
+#include <utils/Timers.h>
+
+#include <binder/Parcel.h>
+#include <binder/IInterface.h>
+
+#include <gui/ISurfaceTexture.h>
+
+namespace android {
+// ----------------------------------------------------------------------------
+
+enum {
+    REQUEST_BUFFER = IBinder::FIRST_CALL_TRANSACTION,
+    SET_BUFFER_COUNT,
+    DEQUEUE_BUFFER,
+    QUEUE_BUFFER,
+    CANCEL_BUFFER,
+    SET_CROP,
+    SET_TRANSFORM,
+};
+
+
+class BpSurfaceTexture : public BpInterface<ISurfaceTexture>
+{
+public:
+    BpSurfaceTexture(const sp<IBinder>& impl)
+        : BpInterface<ISurfaceTexture>(impl)
+    {
+    }
+
+    virtual sp<GraphicBuffer> requestBuffer(int bufferIdx,
+            uint32_t w, uint32_t h, uint32_t format, uint32_t usage) {
+        Parcel data, reply;
+        data.writeInterfaceToken(ISurfaceTexture::getInterfaceDescriptor());
+        data.writeInt32(bufferIdx);
+        data.writeInt32(w);
+        data.writeInt32(h);
+        data.writeInt32(format);
+        data.writeInt32(usage);
+        remote()->transact(REQUEST_BUFFER, data, &reply);
+        sp<GraphicBuffer> buffer;
+        bool nonNull = reply.readInt32();
+        if (nonNull) {
+            buffer = new GraphicBuffer();
+            reply.read(*buffer);
+        }
+        return buffer;
+    }
+
+    virtual status_t setBufferCount(int bufferCount)
+    {
+        Parcel data, reply;
+        data.writeInterfaceToken(ISurfaceTexture::getInterfaceDescriptor());
+        data.writeInt32(bufferCount);
+        remote()->transact(SET_BUFFER_COUNT, data, &reply);
+        status_t err = reply.readInt32();
+        return err;
+    }
+
+    virtual status_t dequeueBuffer(int *buf) {
+        Parcel data, reply;
+        data.writeInterfaceToken(ISurfaceTexture::getInterfaceDescriptor());
+        remote()->transact(DEQUEUE_BUFFER, data, &reply);
+        *buf = reply.readInt32();
+        int result = reply.readInt32();
+        return result;
+    }
+
+    virtual status_t queueBuffer(int buf) {
+        Parcel data, reply;
+        data.writeInterfaceToken(ISurfaceTexture::getInterfaceDescriptor());
+        data.writeInt32(buf);
+        remote()->transact(QUEUE_BUFFER, data, &reply);
+        status_t result = reply.readInt32();
+        return result;
+    }
+
+    virtual void cancelBuffer(int buf) {
+        Parcel data, reply;
+        data.writeInterfaceToken(ISurfaceTexture::getInterfaceDescriptor());
+        data.writeInt32(buf);
+        remote()->transact(CANCEL_BUFFER, data, &reply);
+    }
+
+    virtual status_t setCrop(const Rect& reg) {
+        Parcel data, reply;
+        data.writeInterfaceToken(ISurfaceTexture::getInterfaceDescriptor());
+        data.writeFloat(reg.left);
+        data.writeFloat(reg.top);
+        data.writeFloat(reg.right);
+        data.writeFloat(reg.bottom);
+        remote()->transact(SET_CROP, data, &reply);
+        status_t result = reply.readInt32();
+        return result;
+    }
+
+    virtual status_t setTransform(uint32_t transform) {
+        Parcel data, reply;
+        data.writeInterfaceToken(ISurfaceTexture::getInterfaceDescriptor());
+        data.writeInt32(transform);
+        remote()->transact(SET_TRANSFORM, data, &reply);
+        status_t result = reply.readInt32();
+        return result;
+    }
+};
+
+IMPLEMENT_META_INTERFACE(SurfaceTexture, "android.gui.SurfaceTexture");
+
+// ----------------------------------------------------------------------
+
+status_t BnSurfaceTexture::onTransact(
+    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
+{
+    switch(code) {
+        case REQUEST_BUFFER: {
+            CHECK_INTERFACE(ISurfaceTexture, data, reply);
+            int bufferIdx   = data.readInt32();
+            uint32_t w      = data.readInt32();
+            uint32_t h      = data.readInt32();
+            uint32_t format = data.readInt32();
+            uint32_t usage  = data.readInt32();
+            sp<GraphicBuffer> buffer(requestBuffer(bufferIdx, w, h, format,
+                    usage));
+            reply->writeInt32(buffer != 0);
+            if (buffer != 0) {
+                reply->write(*buffer);
+            }
+            return NO_ERROR;
+        } break;
+        case SET_BUFFER_COUNT: {
+            CHECK_INTERFACE(ISurfaceTexture, data, reply);
+            int bufferCount = data.readInt32();
+            int result = setBufferCount(bufferCount);
+            reply->writeInt32(result);
+            return NO_ERROR;
+        } break;
+        case DEQUEUE_BUFFER: {
+            CHECK_INTERFACE(ISurfaceTexture, data, reply);
+            int buf;
+            int result = dequeueBuffer(&buf);
+            reply->writeInt32(buf);
+            reply->writeInt32(result);
+            return NO_ERROR;
+        } break;
+        case QUEUE_BUFFER: {
+            CHECK_INTERFACE(ISurfaceTexture, data, reply);
+            int buf = data.readInt32();
+            status_t result = queueBuffer(buf);
+            reply->writeInt32(result);
+            return NO_ERROR;
+        } break;
+        case CANCEL_BUFFER: {
+            CHECK_INTERFACE(ISurfaceTexture, data, reply);
+            int buf = data.readInt32();
+            cancelBuffer(buf);
+            return NO_ERROR;
+        } break;
+        case SET_CROP: {
+            Rect reg;
+            CHECK_INTERFACE(ISurfaceTexture, data, reply);
+            reg.left = data.readFloat();
+            reg.top = data.readFloat();
+            reg.right = data.readFloat();
+            reg.bottom = data.readFloat();
+            status_t result = setCrop(reg);
+            reply->writeInt32(result);
+            return NO_ERROR;
+        } break;
+        case SET_TRANSFORM: {
+            Rect reg;
+            CHECK_INTERFACE(ISurfaceTexture, data, reply);
+            uint32_t transform = data.readInt32();
+            status_t result = setTransform(transform);
+            reply->writeInt32(result);
+            return NO_ERROR;
+        } break;
+    }
+    return BBinder::onTransact(code, data, reply, flags);
+}
+
+// ----------------------------------------------------------------------------
+
+}; // namespace android
diff --git a/libs/gui/SurfaceTexture.cpp b/libs/gui/SurfaceTexture.cpp
new file mode 100644
index 0000000..9579996
--- /dev/null
+++ b/libs/gui/SurfaceTexture.cpp
@@ -0,0 +1,199 @@
+/*
+ * Copyright (C) 2010 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 "SurfaceTexture"
+
+#define GL_GLEXT_PROTOTYPES
+#define EGL_EGLEXT_PROTOTYPES
+
+#include <EGL/egl.h>
+#include <EGL/eglext.h>
+#include <GLES2/gl2.h>
+#include <GLES2/gl2ext.h>
+
+#include <gui/SurfaceTexture.h>
+
+#include <surfaceflinger/ISurfaceComposer.h>
+#include <surfaceflinger/SurfaceComposerClient.h>
+
+#include <utils/Log.h>
+
+namespace android {
+
+SurfaceTexture::SurfaceTexture(GLuint tex) :
+    mBufferCount(MIN_BUFFER_SLOTS), mCurrentTexture(INVALID_BUFFER_SLOT),
+    mLastQueued(INVALID_BUFFER_SLOT), mTexName(tex) {
+}
+
+SurfaceTexture::~SurfaceTexture() {
+    freeAllBuffers();
+}
+
+status_t SurfaceTexture::setBufferCount(int bufferCount) {
+    Mutex::Autolock lock(mMutex);
+    freeAllBuffers();
+    mBufferCount = bufferCount;
+    return OK;
+}
+
+sp<GraphicBuffer> SurfaceTexture::requestBuffer(int buf,
+        uint32_t w, uint32_t h, uint32_t format, uint32_t usage) {
+    Mutex::Autolock lock(mMutex);
+    if (buf < 0 || mBufferCount <= buf) {
+        LOGE("requestBuffer: slot index out of range [0, %d]: %d",
+                mBufferCount, buf);
+        return 0;
+    }
+    usage |= GraphicBuffer::USAGE_HW_TEXTURE;
+    sp<ISurfaceComposer> composer(ComposerService::getComposerService());
+    sp<GraphicBuffer> graphicBuffer(composer->createGraphicBuffer(w, h,
+            format, usage));
+    if (graphicBuffer == 0) {
+        LOGE("requestBuffer: SurfaceComposer::createGraphicBuffer failed");
+    } else {
+        mSlots[buf].mGraphicBuffer = graphicBuffer;
+        if (mSlots[buf].mEglImage != EGL_NO_IMAGE_KHR) {
+            eglDestroyImageKHR(mSlots[buf].mEglDisplay, mSlots[buf].mEglImage);
+            mSlots[buf].mEglImage = EGL_NO_IMAGE_KHR;
+            mSlots[buf].mEglDisplay = EGL_NO_DISPLAY;
+        }
+    }
+    return graphicBuffer;
+}
+
+status_t SurfaceTexture::dequeueBuffer(int *buf) {
+    Mutex::Autolock lock(mMutex);
+    int found = INVALID_BUFFER_SLOT;
+    for (int i = 0; i < mBufferCount; i++) {
+        if (!mSlots[i].mOwnedByClient && i != mCurrentTexture) {
+            mSlots[i].mOwnedByClient = true;
+            found = i;
+            break;
+        }
+    }
+    if (found == INVALID_BUFFER_SLOT) {
+        return -EBUSY;
+    }
+    *buf = found;
+    return OK;
+}
+
+status_t SurfaceTexture::queueBuffer(int buf) {
+    Mutex::Autolock lock(mMutex);
+    if (buf < 0 || mBufferCount <= buf) {
+        LOGE("queueBuffer: slot index out of range [0, %d]: %d",
+                mBufferCount, buf);
+        return -EINVAL;
+    } else if (!mSlots[buf].mOwnedByClient) {
+        LOGE("queueBuffer: slot %d is not owned by the client", buf);
+        return -EINVAL;
+    } else if (mSlots[buf].mGraphicBuffer == 0) {
+        LOGE("queueBuffer: slot %d was enqueued without requesting a buffer",
+                buf);
+        return -EINVAL;
+    }
+    mSlots[buf].mOwnedByClient = false;
+    mLastQueued = buf;
+    return OK;
+}
+
+void SurfaceTexture::cancelBuffer(int buf) {
+    Mutex::Autolock lock(mMutex);
+    if (buf < 0 || mBufferCount <= buf) {
+        LOGE("cancelBuffer: slot index out of range [0, %d]: %d", mBufferCount,
+                buf);
+        return;
+    } else if (!mSlots[buf].mOwnedByClient) {
+        LOGE("cancelBuffer: slot %d is not owned by the client", buf);
+        return;
+    }
+    mSlots[buf].mOwnedByClient = false;
+}
+
+status_t SurfaceTexture::setCrop(const Rect& reg) {
+    Mutex::Autolock lock(mMutex);
+    // XXX: How should we handle crops?
+    return OK;
+}
+
+status_t SurfaceTexture::setTransform(uint32_t transform) {
+    Mutex::Autolock lock(mMutex);
+    // XXX: How should we handle transforms?
+    return OK;
+}
+
+status_t SurfaceTexture::updateTexImage() {
+    Mutex::Autolock lock(mMutex);
+
+    // We always bind the texture even if we don't update its contents.
+    glBindTexture(GL_TEXTURE_EXTERNAL_OES, mTexName);
+
+    // Initially both mCurrentTexture and mLastQueued are INVALID_BUFFER_SLOT,
+    // so this check will fail until a buffer gets queued.
+    if (mCurrentTexture != mLastQueued) {
+        // XXX: Figure out the right target.
+        mCurrentTexture = mLastQueued;
+        EGLImageKHR image = mSlots[mCurrentTexture].mEglImage;
+        if (image == EGL_NO_IMAGE_KHR) {
+            EGLDisplay dpy = eglGetCurrentDisplay();
+            sp<GraphicBuffer> graphicBuffer = mSlots[mCurrentTexture].mGraphicBuffer;
+            image = createImage(dpy, graphicBuffer);
+            mSlots[mCurrentTexture].mEglImage = image;
+            mSlots[mCurrentTexture].mEglDisplay = dpy;
+        }
+        glEGLImageTargetTexture2DOES(GL_TEXTURE_EXTERNAL_OES, (GLeglImageOES)image);
+        GLint error = glGetError();
+        if (error != GL_NO_ERROR) {
+            LOGE("error binding external texture image %p (slot %d): %#04x",
+                    image, mCurrentTexture, error);
+            return -EINVAL;
+        }
+    }
+    return OK;
+}
+
+void SurfaceTexture::freeAllBuffers() {
+    for (int i = 0; i < NUM_BUFFER_SLOTS; i++) {
+        mSlots[i].mGraphicBuffer = 0;
+        mSlots[i].mOwnedByClient = false;
+        if (mSlots[i].mEglImage != EGL_NO_IMAGE_KHR) {
+            eglDestroyImageKHR(mSlots[i].mEglDisplay, mSlots[i].mEglImage);
+            mSlots[i].mEglImage = EGL_NO_IMAGE_KHR;
+            mSlots[i].mEglDisplay = EGL_NO_DISPLAY;
+        }
+    }
+}
+
+EGLImageKHR SurfaceTexture::createImage(EGLDisplay dpy,
+        const sp<GraphicBuffer>& graphicBuffer) {
+    EGLClientBuffer cbuf = (EGLClientBuffer)graphicBuffer->getNativeBuffer();
+    EGLint attrs[] = {
+        EGL_IMAGE_PRESERVED_KHR,    EGL_TRUE,
+        EGL_NONE,
+    };
+    EGLImageKHR image = eglCreateImageKHR(dpy, EGL_NO_CONTEXT,
+            EGL_NATIVE_BUFFER_ANDROID, cbuf, attrs);
+    EGLint error = eglGetError();
+    if (error != EGL_SUCCESS) {
+        LOGE("error creating EGLImage: %#x", error);
+    } else if (image == EGL_NO_IMAGE_KHR) {
+        LOGE("no error reported, but no image was returned by "
+                "eglCreateImageKHR");
+    }
+    return image;
+}
+
+}; // namespace android
diff --git a/libs/gui/SurfaceTextureClient.cpp b/libs/gui/SurfaceTextureClient.cpp
new file mode 100644
index 0000000..8a59144
--- /dev/null
+++ b/libs/gui/SurfaceTextureClient.cpp
@@ -0,0 +1,285 @@
+/*
+ * Copyright (C) 2010 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 "SurfaceTextureClient"
+
+#include <gui/SurfaceTextureClient.h>
+
+#include <utils/Log.h>
+
+namespace android {
+
+SurfaceTextureClient::SurfaceTextureClient(
+        const sp<ISurfaceTexture>& surfaceTexture):
+        mSurfaceTexture(surfaceTexture), mReqWidth(1), mReqHeight(1),
+        mReqFormat(DEFAULT_FORMAT), mReqUsage(0), mMutex() {
+    // Initialize the ANativeWindow function pointers.
+    ANativeWindow::setSwapInterval  = setSwapInterval;
+    ANativeWindow::dequeueBuffer    = dequeueBuffer;
+    ANativeWindow::cancelBuffer     = cancelBuffer;
+    ANativeWindow::lockBuffer       = lockBuffer;
+    ANativeWindow::queueBuffer      = queueBuffer;
+    ANativeWindow::query            = query;
+    ANativeWindow::perform          = perform;
+}
+
+int SurfaceTextureClient::setSwapInterval(ANativeWindow* window, int interval) {
+    SurfaceTextureClient* c = getSelf(window);
+    return c->setSwapInterval(interval);
+}
+
+int SurfaceTextureClient::dequeueBuffer(ANativeWindow* window,
+        android_native_buffer_t** buffer) {
+    SurfaceTextureClient* c = getSelf(window);
+    return c->dequeueBuffer(buffer);
+}
+
+int SurfaceTextureClient::cancelBuffer(ANativeWindow* window,
+        android_native_buffer_t* buffer) {
+    SurfaceTextureClient* c = getSelf(window);
+    return c->cancelBuffer(buffer);
+}
+
+int SurfaceTextureClient::lockBuffer(ANativeWindow* window,
+        android_native_buffer_t* buffer) {
+    SurfaceTextureClient* c = getSelf(window);
+    return c->lockBuffer(buffer);
+}
+
+int SurfaceTextureClient::queueBuffer(ANativeWindow* window,
+        android_native_buffer_t* buffer) {
+    SurfaceTextureClient* c = getSelf(window);
+    return c->queueBuffer(buffer);
+}
+
+int SurfaceTextureClient::query(ANativeWindow* window, int what, int* value) {
+    SurfaceTextureClient* c = getSelf(window);
+    return c->query(what, value);
+}
+
+int SurfaceTextureClient::perform(ANativeWindow* window, int operation, ...) {
+    va_list args;
+    va_start(args, operation);
+    SurfaceTextureClient* c = getSelf(window);
+    return c->perform(operation, args);
+}
+
+int SurfaceTextureClient::setSwapInterval(int interval) {
+    return INVALID_OPERATION;
+}
+
+int SurfaceTextureClient::dequeueBuffer(android_native_buffer_t** buffer) {
+    Mutex::Autolock lock(mMutex);
+    int buf = -1;
+    status_t err = mSurfaceTexture->dequeueBuffer(&buf);
+    if (err < 0) {
+        return err;
+    }
+    sp<GraphicBuffer>& gbuf(mSlots[buf]);
+    if (gbuf == 0 || gbuf->getWidth() != mReqWidth ||
+        gbuf->getHeight() != mReqHeight ||
+        uint32_t(gbuf->getPixelFormat()) != mReqFormat ||
+        (gbuf->getUsage() & mReqUsage) != mReqUsage) {
+        gbuf = mSurfaceTexture->requestBuffer(buf, mReqWidth, mReqHeight,
+                mReqFormat, mReqUsage);
+        if (gbuf == 0) {
+            return NO_MEMORY;
+        }
+    }
+    *buffer = gbuf.get();
+    return OK;
+}
+
+int SurfaceTextureClient::cancelBuffer(android_native_buffer_t* buffer) {
+    Mutex::Autolock lock(mMutex);
+    for (int i = 0; i < NUM_BUFFER_SLOTS; i++) {
+        if (mSlots[i].get() == buffer) {
+            mSurfaceTexture->cancelBuffer(i);
+            return OK;
+        }
+    }
+    return BAD_VALUE;
+}
+
+int SurfaceTextureClient::lockBuffer(android_native_buffer_t* buffer) {
+    Mutex::Autolock lock(mMutex);
+    return OK;
+}
+
+int SurfaceTextureClient::queueBuffer(android_native_buffer_t* buffer) {
+    Mutex::Autolock lock(mMutex);
+    for (int i = 0; i < NUM_BUFFER_SLOTS; i++) {
+        if (mSlots[i].get() == GraphicBuffer::getSelf(buffer)) {
+            return mSurfaceTexture->queueBuffer(i);
+        }
+    }
+    LOGE("queueBuffer: unknown buffer queued");
+    return BAD_VALUE;
+}
+
+int SurfaceTextureClient::query(int what, int* value) {
+    Mutex::Autolock lock(mMutex);
+    // XXX: Implement this!
+    return INVALID_OPERATION;
+}
+
+int SurfaceTextureClient::perform(int operation, va_list args)
+{
+    int res = NO_ERROR;
+    switch (operation) {
+    case NATIVE_WINDOW_CONNECT:
+        res = dispatchConnect(args);
+        break;
+    case NATIVE_WINDOW_DISCONNECT:
+        res = dispatchDisconnect(args);
+        break;
+    case NATIVE_WINDOW_SET_USAGE:
+        res = dispatchSetUsage(args);
+        break;
+    case NATIVE_WINDOW_SET_CROP:
+        res = dispatchSetCrop(args);
+        break;
+    case NATIVE_WINDOW_SET_BUFFER_COUNT:
+        res = dispatchSetBufferCount(args);
+        break;
+    case NATIVE_WINDOW_SET_BUFFERS_GEOMETRY:
+        res = dispatchSetBuffersGeometry(args);
+        break;
+    case NATIVE_WINDOW_SET_BUFFERS_TRANSFORM:
+        res = dispatchSetBuffersTransform(args);
+        break;
+    default:
+        res = NAME_NOT_FOUND;
+        break;
+    }
+    return res;
+}
+
+int SurfaceTextureClient::dispatchConnect(va_list args) {
+    int api = va_arg(args, int);
+    return connect(api);
+}
+
+int SurfaceTextureClient::dispatchDisconnect(va_list args) {
+    int api = va_arg(args, int);
+    return disconnect(api);
+}
+
+int SurfaceTextureClient::dispatchSetUsage(va_list args) {
+    int usage = va_arg(args, int);
+    return setUsage(usage);
+}
+
+int SurfaceTextureClient::dispatchSetCrop(va_list args) {
+    android_native_rect_t const* rect = va_arg(args, android_native_rect_t*);
+    return setCrop(reinterpret_cast<Rect const*>(rect));
+}
+
+int SurfaceTextureClient::dispatchSetBufferCount(va_list args) {
+    size_t bufferCount = va_arg(args, size_t);
+    return setBufferCount(bufferCount);
+}
+
+int SurfaceTextureClient::dispatchSetBuffersGeometry(va_list args) {
+    int w = va_arg(args, int);
+    int h = va_arg(args, int);
+    int f = va_arg(args, int);
+    return setBuffersGeometry(w, h, f);
+}
+
+int SurfaceTextureClient::dispatchSetBuffersTransform(va_list args) {
+    int transform = va_arg(args, int);
+    return setBuffersTransform(transform);
+}
+
+int SurfaceTextureClient::connect(int api) {
+    // XXX: Implement this!
+    return INVALID_OPERATION;
+}
+
+int SurfaceTextureClient::disconnect(int api) {
+    // XXX: Implement this!
+    return INVALID_OPERATION;
+}
+
+int SurfaceTextureClient::setUsage(uint32_t reqUsage)
+{
+    Mutex::Autolock lock(mMutex);
+    mReqUsage = reqUsage;
+    return OK;
+}
+
+int SurfaceTextureClient::setCrop(Rect const* rect)
+{
+    Mutex::Autolock lock(mMutex);
+
+    // empty/invalid rects are not allowed
+    if (rect->isEmpty())
+        return BAD_VALUE;
+
+    status_t err = mSurfaceTexture->setCrop(*rect);
+    LOGE_IF(err, "ISurfaceTexture::setCrop(...) returned %s",
+            strerror(-err));
+
+    return err;
+}
+
+int SurfaceTextureClient::setBufferCount(int bufferCount)
+{
+    Mutex::Autolock lock(mMutex);
+
+    status_t err = mSurfaceTexture->setBufferCount(bufferCount);
+    LOGE_IF(err, "ISurfaceTexture::setBufferCount(%d) returned %s",
+            bufferCount, strerror(-err));
+
+    if (err == NO_ERROR) {
+        freeAllBuffers();
+    }
+
+    return err;
+}
+
+int SurfaceTextureClient::setBuffersGeometry(int w, int h, int format)
+{
+    Mutex::Autolock lock(mMutex);
+
+    if (w<0 || h<0 || format<0)
+        return BAD_VALUE;
+
+    if ((w && !h) || (!w && h))
+        return BAD_VALUE;
+
+    mReqWidth = w;
+    mReqHeight = h;
+    mReqFormat = format;
+
+    return NO_ERROR;
+}
+
+int SurfaceTextureClient::setBuffersTransform(int transform)
+{
+    Mutex::Autolock lock(mMutex);
+    status_t err = mSurfaceTexture->setTransform(transform);
+    return err;
+}
+
+void SurfaceTextureClient::freeAllBuffers() {
+    for (int i = 0; i < NUM_BUFFER_SLOTS; i++) {
+        mSlots[i] = 0;
+    }
+}
+
+}; // namespace android