diff --git a/include/gui/ISurfaceTexture.h b/include/gui/ISurfaceTexture.h
index 5b5b731..e764425 100644
--- a/include/gui/ISurfaceTexture.h
+++ b/include/gui/ISurfaceTexture.h
@@ -78,7 +78,12 @@
     // client for this buffer. The timestamp is measured in nanoseconds, and
     // must be monotonically increasing. Its other properties (zero point, etc)
     // are client-dependent, and should be documented by the client.
-    virtual status_t queueBuffer(int slot, int64_t timestamp) = 0;
+    //
+    // outWidth, outHeight and outTransform are filed with the default width
+    // default height of the window and current transform applied to buffers,
+    // respectively.
+    virtual status_t queueBuffer(int slot, int64_t timestamp,
+            uint32_t* outWidth, uint32_t* outHeight, uint32_t* outTransform) = 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
@@ -87,6 +92,7 @@
 
     virtual status_t setCrop(const Rect& reg) = 0;
     virtual status_t setTransform(uint32_t transform) = 0;
+    virtual status_t setScalingMode(int mode) = 0;
 
     // getAllocator retrieves the binder object that must be referenced as long
     // as the GraphicBuffers dequeued from this ISurfaceTexture are referenced.
diff --git a/include/gui/SurfaceTexture.h b/include/gui/SurfaceTexture.h
index 4080f27..945f4bc 100644
--- a/include/gui/SurfaceTexture.h
+++ b/include/gui/SurfaceTexture.h
@@ -84,10 +84,12 @@
     // nanoseconds, and must be monotonically increasing. Its other semantics
     // (zero point, etc) are client-dependent and should be documented by the
     // client.
-    virtual status_t queueBuffer(int buf, int64_t timestamp);
+    virtual status_t queueBuffer(int buf, int64_t timestamp,
+            uint32_t* outWidth, uint32_t* outHeight, uint32_t* outTransform);
     virtual void cancelBuffer(int buf);
     virtual status_t setCrop(const Rect& reg);
     virtual status_t setTransform(uint32_t transform);
+    virtual status_t setScalingMode(int mode);
 
     virtual int query(int what, int* value);
 
@@ -185,6 +187,9 @@
     // getCurrentTransform returns the transform of the current buffer
     uint32_t getCurrentTransform() const;
 
+    // getCurrentScalingMode returns the scaling mode of the current buffer
+    uint32_t getCurrentScalingMode() const;
+
     // dump our state in a String
     void dump(String8& result) const;
     void dump(String8& result, const char* prefix, char* buffer, size_t SIZE) const;
@@ -220,6 +225,7 @@
               mBufferState(BufferSlot::FREE),
               mRequestBufferCalled(false),
               mTransform(0),
+              mScalingMode(NATIVE_WINDOW_SCALING_MODE_FREEZE),
               mTimestamp(0) {
             mCrop.makeInvalid();
         }
@@ -281,6 +287,11 @@
         // slot.
         uint32_t mTransform;
 
+        // mScalingMode is the current scaling mode for this buffer slot. This
+        // gets set to mNextScalingMode each time queueBuffer gets called for
+        // this slot.
+        uint32_t mScalingMode;
+
         // mTimestamp is the current timestamp for this buffer slot. This gets
         // to set by queueBuffer each time this slot is queued.
         int64_t mTimestamp;
@@ -337,20 +348,24 @@
     sp<GraphicBuffer> mCurrentTextureBuf;
 
     // mCurrentCrop is the crop rectangle that applies to the current texture.
-    // It gets set to mLastQueuedCrop each time updateTexImage is called.
+    // It gets set each time updateTexImage is called.
     Rect mCurrentCrop;
 
     // mCurrentTransform is the transform identifier for the current texture. It
-    // gets set to mLastQueuedTransform each time updateTexImage is called.
+    // gets set each time updateTexImage is called.
     uint32_t mCurrentTransform;
 
+    // mCurrentScalingMode is the scaling mode for the current texture. It gets
+    // set to each time updateTexImage is called.
+    uint32_t mCurrentScalingMode;
+
     // mCurrentTransformMatrix is the transform matrix for the current texture.
     // It gets computed by computeTransformMatrix each time updateTexImage is
     // called.
     float mCurrentTransformMatrix[16];
 
     // mCurrentTimestamp is the timestamp for the current texture. It
-    // gets set to mLastQueuedTimestamp each time updateTexImage is called.
+    // gets set each time updateTexImage is called.
     int64_t mCurrentTimestamp;
 
     // mNextCrop is the crop rectangle that will be used for the next buffer
@@ -361,6 +376,10 @@
     // buffer that gets queued. It is set by calling setTransform.
     uint32_t mNextTransform;
 
+    // mNextScalingMode is the scaling mode that will be used for the next
+    // buffers that get queued. It is set by calling setScalingMode.
+    int mNextScalingMode;
+
     // 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.
diff --git a/include/gui/SurfaceTextureClient.h b/include/gui/SurfaceTextureClient.h
index cfe2aa1..829d8ab 100644
--- a/include/gui/SurfaceTextureClient.h
+++ b/include/gui/SurfaceTextureClient.h
@@ -63,6 +63,7 @@
     int dispatchSetBuffersGeometry(va_list args);
     int dispatchSetBuffersDimensions(va_list args);
     int dispatchSetBuffersFormat(va_list args);
+    int dispatchSetScalingMode(va_list args);
     int dispatchSetBuffersTransform(va_list args);
     int dispatchSetBuffersTimestamp(va_list args);
     int dispatchSetCrop(va_list args);
@@ -84,6 +85,7 @@
     virtual int setBufferCount(int bufferCount);
     virtual int setBuffersDimensions(int w, int h);
     virtual int setBuffersFormat(int format);
+    virtual int setScalingMode(int mode);
     virtual int setBuffersTransform(int transform);
     virtual int setBuffersTimestamp(int64_t timestamp);
     virtual int setCrop(Rect const* rect);
@@ -149,6 +151,18 @@
     // dequeued format or to mReqFormat if no buffer was dequeued.
     uint32_t mQueryFormat;
 
+    // mDefaultWidth is default width of the window, regardless of the
+    // set_dimension call
+    uint32_t mDefaultWidth;
+
+    // mDefaultHeight is default width of the window, regardless of the
+    // set_dimension call
+    uint32_t mDefaultHeight;
+
+    // mTransformHint is the transform probably applied to buffers of this
+    // window. this is only a hint, actual transform may differ.
+    uint32_t mTransformHint;
+
     // 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.
diff --git a/libs/gui/ISurfaceTexture.cpp b/libs/gui/ISurfaceTexture.cpp
index 41434a4..be90e2e 100644
--- a/libs/gui/ISurfaceTexture.cpp
+++ b/libs/gui/ISurfaceTexture.cpp
@@ -43,6 +43,7 @@
     SET_SYNCHRONOUS_MODE,
     CONNECT,
     DISCONNECT,
+    SET_SCALING_MODE,
 };
 
 
@@ -92,12 +93,16 @@
         return result;
     }
 
-    virtual status_t queueBuffer(int buf, int64_t timestamp) {
+    virtual status_t queueBuffer(int buf, int64_t timestamp,
+            uint32_t* outWidth, uint32_t* outHeight, uint32_t* outTransform) {
         Parcel data, reply;
         data.writeInterfaceToken(ISurfaceTexture::getInterfaceDescriptor());
         data.writeInt32(buf);
         data.writeInt64(timestamp);
         remote()->transact(QUEUE_BUFFER, data, &reply);
+        *outWidth = reply.readInt32();
+        *outHeight = reply.readInt32();
+        *outTransform = reply.readInt32();
         status_t result = reply.readInt32();
         return result;
     }
@@ -130,6 +135,15 @@
         return result;
     }
 
+    virtual status_t setScalingMode(int mode) {
+        Parcel data, reply;
+        data.writeInterfaceToken(ISurfaceTexture::getInterfaceDescriptor());
+        data.writeInt32(mode);
+        remote()->transact(SET_SCALING_MODE, data, &reply);
+        status_t result = reply.readInt32();
+        return result;
+    }
+
     virtual sp<IBinder> getAllocator() {
         Parcel data, reply;
         data.writeInterfaceToken(ISurfaceTexture::getInterfaceDescriptor());
@@ -216,7 +230,12 @@
             CHECK_INTERFACE(ISurfaceTexture, data, reply);
             int buf = data.readInt32();
             int64_t timestamp = data.readInt64();
-            status_t result = queueBuffer(buf, timestamp);
+            uint32_t outWidth, outHeight, outTransform;
+            status_t result = queueBuffer(buf, timestamp,
+                    &outWidth, &outHeight, &outTransform);
+            reply->writeInt32(outWidth);
+            reply->writeInt32(outHeight);
+            reply->writeInt32(outTransform);
             reply->writeInt32(result);
             return NO_ERROR;
         } break;
@@ -244,6 +263,13 @@
             reply->writeInt32(result);
             return NO_ERROR;
         } break;
+        case SET_SCALING_MODE: {
+            CHECK_INTERFACE(ISurfaceTexture, data, reply);
+            int mode = data.readInt32();
+            status_t result = setScalingMode(mode);
+            reply->writeInt32(result);
+            return NO_ERROR;
+        } break;
         case GET_ALLOCATOR: {
             CHECK_INTERFACE(ISurfaceTexture, data, reply);
             sp<IBinder> result = getAllocator();
diff --git a/libs/gui/SurfaceTexture.cpp b/libs/gui/SurfaceTexture.cpp
index a12d40a..0f08570 100644
--- a/libs/gui/SurfaceTexture.cpp
+++ b/libs/gui/SurfaceTexture.cpp
@@ -90,6 +90,7 @@
     mCurrentTransform(0),
     mCurrentTimestamp(0),
     mNextTransform(0),
+    mNextScalingMode(NATIVE_WINDOW_SCALING_MODE_FREEZE),
     mTexName(tex),
     mSynchronousMode(false),
     mAllowSynchronousMode(allowSynchronousMode),
@@ -401,7 +402,8 @@
     return err;
 }
 
-status_t SurfaceTexture::queueBuffer(int buf, int64_t timestamp) {
+status_t SurfaceTexture::queueBuffer(int buf, int64_t timestamp,
+        uint32_t* outWidth, uint32_t* outHeight, uint32_t* outTransform) {
     LOGV("SurfaceTexture::queueBuffer");
 
     sp<FrameAvailableListener> listener;
@@ -453,6 +455,7 @@
         mSlots[buf].mBufferState = BufferSlot::QUEUED;
         mSlots[buf].mCrop = mNextCrop;
         mSlots[buf].mTransform = mNextTransform;
+        mSlots[buf].mScalingMode = mNextScalingMode;
         mSlots[buf].mTimestamp = timestamp;
         mDequeueCondition.signal();
     } // scope for the lock
@@ -461,6 +464,11 @@
     if (listener != 0) {
         listener->onFrameAvailable();
     }
+
+    *outWidth = mDefaultWidth;
+    *outHeight = mDefaultHeight;
+    *outTransform = 0;
+
     return OK;
 }
 
@@ -542,6 +550,22 @@
     return err;
 }
 
+status_t SurfaceTexture::setScalingMode(int mode) {
+    LOGV("SurfaceTexture::setScalingMode(%d)", mode);
+
+    switch (mode) {
+        case NATIVE_WINDOW_SCALING_MODE_FREEZE:
+        case NATIVE_WINDOW_SCALING_MODE_SCALE_TO_WINDOW:
+            break;
+        default:
+            return BAD_VALUE;
+    }
+
+    Mutex::Autolock lock(mMutex);
+    mNextScalingMode = mode;
+    return OK;
+}
+
 status_t SurfaceTexture::updateTexImage() {
     LOGV("SurfaceTexture::updateTexImage");
     Mutex::Autolock lock(mMutex);
@@ -602,6 +626,7 @@
         mCurrentTextureBuf = mSlots[buf].mGraphicBuffer;
         mCurrentCrop = mSlots[buf].mCrop;
         mCurrentTransform = mSlots[buf].mTransform;
+        mCurrentScalingMode = mSlots[buf].mScalingMode;
         mCurrentTimestamp = mSlots[buf].mTimestamp;
         computeCurrentTransformMatrix();
 
@@ -809,6 +834,11 @@
     return mCurrentTransform;
 }
 
+uint32_t SurfaceTexture::getCurrentScalingMode() const {
+    Mutex::Autolock lock(mMutex);
+    return mCurrentScalingMode;
+}
+
 int SurfaceTexture::query(int what, int* outValue)
 {
     Mutex::Autolock lock(mMutex);
diff --git a/libs/gui/SurfaceTextureClient.cpp b/libs/gui/SurfaceTextureClient.cpp
index d5b7c89..1dc6cd2 100644
--- a/libs/gui/SurfaceTextureClient.cpp
+++ b/libs/gui/SurfaceTextureClient.cpp
@@ -222,26 +222,38 @@
     if (i < 0) {
         return i;
     }
-    mSurfaceTexture->queueBuffer(i, timestamp);
+    mSurfaceTexture->queueBuffer(i, timestamp,
+            &mDefaultWidth, &mDefaultHeight, &mTransformHint);
     return OK;
 }
 
 int SurfaceTextureClient::query(int what, int* value) const {
     LOGV("SurfaceTextureClient::query");
-    switch (what) {
-    case NATIVE_WINDOW_FORMAT:
-        if (mReqFormat) {
-            *value = mReqFormat;
-            return NO_ERROR;
+    { // scope for the lock
+        Mutex::Autolock lock(mMutex);
+        switch (what) {
+            case NATIVE_WINDOW_FORMAT:
+                if (mReqFormat) {
+                    *value = mReqFormat;
+                    return NO_ERROR;
+                }
+                break;
+            case NATIVE_WINDOW_QUEUES_TO_WINDOW_COMPOSER:
+                *value = 0;
+                return NO_ERROR;
+            case NATIVE_WINDOW_CONCRETE_TYPE:
+                *value = NATIVE_WINDOW_SURFACE_TEXTURE_CLIENT;
+                return NO_ERROR;
+            case NATIVE_WINDOW_DEFAULT_WIDTH:
+                *value = mDefaultWidth;
+                return NO_ERROR;
+            case NATIVE_WINDOW_DEFAULT_HEIGHT:
+                *value = mDefaultHeight;
+                return NO_ERROR;
+            case NATIVE_WINDOW_TRANSFORM_HINT:
+                *value = mTransformHint;
+                return NO_ERROR;
         }
-        break;
-    case NATIVE_WINDOW_QUEUES_TO_WINDOW_COMPOSER:
-        // TODO: this is not needed anymore
-        *value = 0;
-        return NO_ERROR;
-    case NATIVE_WINDOW_CONCRETE_TYPE:
-        *value = NATIVE_WINDOW_SURFACE_TEXTURE_CLIENT;
-        return NO_ERROR;
     }
     return mSurfaceTexture->query(what, value);
 }
@@ -286,6 +298,9 @@
     case NATIVE_WINDOW_UNLOCK_AND_POST:
         res = dispatchUnlockAndPost(args);
         break;
+    case NATIVE_WINDOW_SET_SCALING_MODE:
+        res = dispatchSetScalingMode(args);
+        break;
     default:
         res = NAME_NOT_FOUND;
         break;
@@ -340,6 +355,11 @@
     return setBuffersFormat(f);
 }
 
+int SurfaceTextureClient::dispatchSetScalingMode(va_list args) {
+    int m = va_arg(args, int);
+    return setScalingMode(m);
+}
+
 int SurfaceTextureClient::dispatchSetBuffersTransform(va_list args) {
     int transform = va_arg(args, int);
     return setBuffersTransform(transform);
@@ -456,6 +476,18 @@
     return NO_ERROR;
 }
 
+int SurfaceTextureClient::setScalingMode(int mode)
+{
+    LOGV("SurfaceTextureClient::setScalingMode(%d)", mode);
+    Mutex::Autolock lock(mMutex);
+    // mode is validated on the server
+    status_t err = mSurfaceTexture->setScalingMode(mode);
+    LOGE_IF(err, "ISurfaceTexture::setScalingMode(%d) returned %s",
+            mode, strerror(-err));
+
+    return err;
+}
+
 int SurfaceTextureClient::setBuffersTransform(int transform)
 {
     LOGV("SurfaceTextureClient::setBuffersTransform");
diff --git a/libs/ui/FramebufferNativeWindow.cpp b/libs/ui/FramebufferNativeWindow.cpp
index 794747d..412552e 100644
--- a/libs/ui/FramebufferNativeWindow.cpp
+++ b/libs/ui/FramebufferNativeWindow.cpp
@@ -289,6 +289,18 @@
         case NATIVE_WINDOW_CONCRETE_TYPE:
             *value = NATIVE_WINDOW_FRAMEBUFFER;
             return NO_ERROR;
+        case NATIVE_WINDOW_QUEUES_TO_WINDOW_COMPOSER:
+            *value = 0;
+            return NO_ERROR;
+        case NATIVE_WINDOW_DEFAULT_WIDTH:
+            *value = fb->width;
+            return NO_ERROR;
+        case NATIVE_WINDOW_DEFAULT_HEIGHT:
+            *value = fb->height;
+            return NO_ERROR;
+        case NATIVE_WINDOW_TRANSFORM_HINT:
+            *value = 0;
+            return NO_ERROR;
     }
     *value = 0;
     return BAD_VALUE;
@@ -299,18 +311,38 @@
 {
     switch (operation) {
         case NATIVE_WINDOW_SET_USAGE:
-        case NATIVE_WINDOW_SET_BUFFERS_FORMAT:
+            // TODO: we should implement this
+            return NO_ERROR;
         case NATIVE_WINDOW_CONNECT:
+            // TODO: we should implement this
+            return NO_ERROR;
         case NATIVE_WINDOW_DISCONNECT:
-            break;
+            // TODO: we should implement this
+            return NO_ERROR;
         case NATIVE_WINDOW_LOCK:
             return INVALID_OPERATION;
         case NATIVE_WINDOW_UNLOCK_AND_POST:
             return INVALID_OPERATION;
-        default:
-            return NAME_NOT_FOUND;
+        case NATIVE_WINDOW_SET_CROP:
+            return INVALID_OPERATION;
+        case NATIVE_WINDOW_SET_BUFFER_COUNT:
+            // TODO: we should implement this
+            return INVALID_OPERATION;
+        case NATIVE_WINDOW_SET_BUFFERS_GEOMETRY:
+            return INVALID_OPERATION;
+        case NATIVE_WINDOW_SET_BUFFERS_TRANSFORM:
+            return INVALID_OPERATION;
+        case NATIVE_WINDOW_SET_BUFFERS_TIMESTAMP:
+            return INVALID_OPERATION;
+        case NATIVE_WINDOW_SET_BUFFERS_DIMENSIONS:
+            return INVALID_OPERATION;
+        case NATIVE_WINDOW_SET_BUFFERS_FORMAT:
+            // TODO: we should implement this
+            return NO_ERROR;
+        case NATIVE_WINDOW_SET_SCALING_MODE:
+            return INVALID_OPERATION;
     }
-    return NO_ERROR;
+    return NAME_NOT_FOUND;
 }
 
 // ----------------------------------------------------------------------------
diff --git a/opengl/tests/gl2_copyTexImage/Android.mk b/opengl/tests/gl2_copyTexImage/Android.mk
new file mode 100644
index 0000000..bef1f90
--- /dev/null
+++ b/opengl/tests/gl2_copyTexImage/Android.mk
@@ -0,0 +1,19 @@
+LOCAL_PATH:= $(call my-dir)
+include $(CLEAR_VARS)
+
+LOCAL_SRC_FILES:= \
+	gl2_copyTexImage.cpp
+
+LOCAL_SHARED_LIBRARIES := \
+	libcutils \
+    libEGL \
+    libGLESv2 \
+    libui
+
+LOCAL_MODULE:= test-opengl-gl2_copyTexImage
+
+LOCAL_MODULE_TAGS := optional
+
+LOCAL_CFLAGS := -DGL_GLEXT_PROTOTYPES
+
+include $(BUILD_EXECUTABLE)
diff --git a/opengl/tests/gl2_copyTexImage/gl2_copyTexImage.cpp b/opengl/tests/gl2_copyTexImage/gl2_copyTexImage.cpp
new file mode 100644
index 0000000..c2bfdec
--- /dev/null
+++ b/opengl/tests/gl2_copyTexImage/gl2_copyTexImage.cpp
@@ -0,0 +1,467 @@
+/*
+ * 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 <stdio.h>
+#include <time.h>
+#include <sched.h>
+#include <sys/resource.h>
+
+#include <EGL/egl.h>
+#include <GLES2/gl2.h>
+#include <GLES2/gl2ext.h>
+
+#include <utils/Timers.h>
+
+#include <ui/FramebufferNativeWindow.h>
+#include <ui/EGLUtils.h>
+
+using namespace android;
+
+static void printGLString(const char *name, GLenum s) {
+    // fprintf(stderr, "printGLString %s, %d\n", name, s);
+    const char *v = (const char *) glGetString(s);
+    // int error = glGetError();
+    // fprintf(stderr, "glGetError() = %d, result of glGetString = %x\n", error,
+    //        (unsigned int) v);
+    // if ((v < (const char*) 0) || (v > (const char*) 0x10000))
+    //    fprintf(stderr, "GL %s = %s\n", name, v);
+    // else
+    //    fprintf(stderr, "GL %s = (null) 0x%08x\n", name, (unsigned int) v);
+    fprintf(stderr, "GL %s = %s\n", name, v);
+}
+
+static void checkEglError(const char* op, EGLBoolean returnVal = EGL_TRUE) {
+    if (returnVal != EGL_TRUE) {
+        fprintf(stderr, "%s() returned %d\n", op, returnVal);
+    }
+
+    for (EGLint error = eglGetError(); error != EGL_SUCCESS; error
+            = eglGetError()) {
+        fprintf(stderr, "after %s() eglError %s (0x%x)\n", op, EGLUtils::strerror(error),
+                error);
+    }
+}
+
+static void checkGlError(const char* op) {
+    for (GLint error = glGetError(); error; error
+            = glGetError()) {
+        fprintf(stderr, "after %s() glError (0x%x)\n", op, error);
+    }
+}
+
+static const char gVertexShader[] = "attribute vec4 vPosition;\n"
+    "void main() {\n"
+    "  gl_Position = vPosition;\n"
+    "}\n";
+
+static const char gFragmentShader[] = "precision mediump float;\n"
+    "void main() {\n"
+    "  gl_FragColor = vec4(0.0, 1.0, 0.0, 0.5);\n"
+    "}\n";
+
+GLuint loadShader(GLenum shaderType, const char* pSource) {
+    GLuint shader = glCreateShader(shaderType);
+    if (shader) {
+        glShaderSource(shader, 1, &pSource, NULL);
+        glCompileShader(shader);
+        GLint compiled = 0;
+        glGetShaderiv(shader, GL_COMPILE_STATUS, &compiled);
+        if (!compiled) {
+            GLint infoLen = 0;
+            glGetShaderiv(shader, GL_INFO_LOG_LENGTH, &infoLen);
+            if (infoLen) {
+                char* buf = (char*) malloc(infoLen);
+                if (buf) {
+                    glGetShaderInfoLog(shader, infoLen, NULL, buf);
+                    fprintf(stderr, "Could not compile shader %d:\n%s\n",
+                            shaderType, buf);
+                    free(buf);
+                }
+                glDeleteShader(shader);
+                shader = 0;
+            }
+        }
+    }
+    return shader;
+}
+
+GLuint createProgram(const char* pVertexSource, const char* pFragmentSource) {
+    GLuint vertexShader = loadShader(GL_VERTEX_SHADER, pVertexSource);
+    if (!vertexShader) {
+        return 0;
+    }
+
+    GLuint pixelShader = loadShader(GL_FRAGMENT_SHADER, pFragmentSource);
+    if (!pixelShader) {
+        return 0;
+    }
+
+    GLuint program = glCreateProgram();
+    if (program) {
+        glAttachShader(program, vertexShader);
+        checkGlError("glAttachShader");
+        glAttachShader(program, pixelShader);
+        checkGlError("glAttachShader");
+        glLinkProgram(program);
+        GLint linkStatus = GL_FALSE;
+        glGetProgramiv(program, GL_LINK_STATUS, &linkStatus);
+        if (linkStatus != GL_TRUE) {
+            GLint bufLength = 0;
+            glGetProgramiv(program, GL_INFO_LOG_LENGTH, &bufLength);
+            if (bufLength) {
+                char* buf = (char*) malloc(bufLength);
+                if (buf) {
+                    glGetProgramInfoLog(program, bufLength, NULL, buf);
+                    fprintf(stderr, "Could not link program:\n%s\n", buf);
+                    free(buf);
+                }
+            }
+            glDeleteProgram(program);
+            program = 0;
+        }
+    }
+    return program;
+}
+
+GLuint gProgram;
+GLuint gTextureProgram;
+GLuint gvPositionHandle;
+GLuint gvTexturePositionHandle;
+GLuint gvTextureTexCoordsHandle;
+GLuint gvTextureSamplerHandle;
+GLuint gFbo;
+GLuint gTexture;
+GLuint gBufferTexture;
+
+static const char gSimpleVS[] =
+    "attribute vec4 position;\n"
+    "attribute vec2 texCoords;\n"
+    "varying vec2 outTexCoords;\n"
+    "\nvoid main(void) {\n"
+    "    outTexCoords = texCoords;\n"
+    "    gl_Position = position;\n"
+    "}\n\n";
+static const char gSimpleFS[] =
+    "precision mediump float;\n\n"
+    "varying vec2 outTexCoords;\n"
+    "uniform sampler2D texture;\n"
+    "\nvoid main(void) {\n"
+    "    gl_FragColor = texture2D(texture, outTexCoords);\n"
+    "}\n\n";
+
+bool setupGraphics(int w, int h) {
+    gProgram = createProgram(gVertexShader, gFragmentShader);
+    if (!gProgram) {
+        return false;
+    }
+    gvPositionHandle = glGetAttribLocation(gProgram, "vPosition");
+    checkGlError("glGetAttribLocation");
+    fprintf(stderr, "glGetAttribLocation(\"vPosition\") = %d\n", gvPositionHandle);
+
+    gTextureProgram = createProgram(gSimpleVS, gSimpleFS);
+    if (!gTextureProgram) {
+        return false;
+    }
+    gvTexturePositionHandle = glGetAttribLocation(gTextureProgram, "position");
+    checkGlError("glGetAttribLocation");
+    gvTextureTexCoordsHandle = glGetAttribLocation(gTextureProgram, "texCoords");
+    checkGlError("glGetAttribLocation");
+    gvTextureSamplerHandle = glGetUniformLocation(gTextureProgram, "texture");
+    checkGlError("glGetAttribLocation");
+
+    glActiveTexture(GL_TEXTURE0);
+
+    glGenTextures(1, &gTexture);
+    glBindTexture(GL_TEXTURE_2D, gTexture);
+    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, w, h, 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
+
+    glGenTextures(1, &gBufferTexture);
+    glBindTexture(GL_TEXTURE_2D, gBufferTexture);
+    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, w, h, 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
+
+    glGenFramebuffers(1, &gFbo);
+    glBindFramebuffer(GL_FRAMEBUFFER, gFbo);
+    glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, gTexture, 0);
+
+    glBindFramebuffer(GL_FRAMEBUFFER, 0);
+
+    glViewport(0, 0, w, h);
+    checkGlError("glViewport");
+    return true;
+}
+
+const GLfloat gTriangleVertices[] = { 0.0f, 0.5f, -0.5f, -0.5f,
+        0.5f, -0.5f };
+
+const GLint FLOAT_SIZE_BYTES = 4;
+const GLint TRIANGLE_VERTICES_DATA_STRIDE_BYTES = 5 * FLOAT_SIZE_BYTES;
+const GLfloat gTriangleVerticesData[] = {
+    // X, Y, Z, U, V
+    -1.0f, -1.0f, 0, 0.f, 0.f,
+    1.0f, -1.0f, 0, 1.f, 0.f,
+    -1.0f,  1.0f, 0, 0.f, 1.f,
+    1.0f,   1.0f, 0, 1.f, 1.f,
+};
+
+void renderFrame(GLint w, GLint h) {
+    glClearColor(1.0f, 0.0f, 0.0f, 1.0f);
+    checkGlError("glClearColor");
+    glClear(GL_DEPTH_BUFFER_BIT | GL_COLOR_BUFFER_BIT);
+    checkGlError("glClear");
+
+    // Bind FBO and draw into it
+    glBindFramebuffer(GL_FRAMEBUFFER, gFbo);
+    checkGlError("glBindFramebuffer");
+
+    glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
+    checkGlError("glClearColor");
+    glClear(GL_COLOR_BUFFER_BIT);
+    checkGlError("glClear");
+
+    glUseProgram(gProgram);
+    checkGlError("glUseProgram");
+
+    glVertexAttribPointer(gvPositionHandle, 2, GL_FLOAT, GL_FALSE, 0, gTriangleVertices);
+    checkGlError("glVertexAttribPointer");
+    glEnableVertexAttribArray(gvPositionHandle);
+    checkGlError("glEnableVertexAttribArray");
+    glDrawArrays(GL_TRIANGLES, 0, 3);
+    checkGlError("glDrawArrays");
+
+    // Copy content of FBO into a texture
+    glBindTexture(GL_TEXTURE_2D, gBufferTexture);
+    glCopyTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, 0, 0, w / 2, h / 2);
+    checkGlError("glCopyTexSubImage2D");
+
+    // Back to the display
+    glBindFramebuffer(GL_FRAMEBUFFER, 0);
+    checkGlError("glBindFramebuffer");
+
+    // Draw copied content on the screen
+    glUseProgram(gTextureProgram);
+    checkGlError("glUseProgram");
+
+    glEnable(GL_BLEND);
+    glBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA);
+
+    glVertexAttribPointer(gvTexturePositionHandle, 3, GL_FLOAT, GL_FALSE,
+            TRIANGLE_VERTICES_DATA_STRIDE_BYTES, gTriangleVerticesData);
+    checkGlError("glVertexAttribPointer");
+    glVertexAttribPointer(gvTextureTexCoordsHandle, 2, GL_FLOAT, GL_FALSE,
+            TRIANGLE_VERTICES_DATA_STRIDE_BYTES, &gTriangleVerticesData[3]);
+    checkGlError("glVertexAttribPointer");
+    glEnableVertexAttribArray(gvTexturePositionHandle);
+    glEnableVertexAttribArray(gvTextureTexCoordsHandle);
+    checkGlError("glEnableVertexAttribArray");
+    glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
+    checkGlError("glDrawArrays");
+}
+
+void printEGLConfiguration(EGLDisplay dpy, EGLConfig config) {
+
+#define X(VAL) {VAL, #VAL}
+    struct {EGLint attribute; const char* name;} names[] = {
+    X(EGL_BUFFER_SIZE),
+    X(EGL_ALPHA_SIZE),
+    X(EGL_BLUE_SIZE),
+    X(EGL_GREEN_SIZE),
+    X(EGL_RED_SIZE),
+    X(EGL_DEPTH_SIZE),
+    X(EGL_STENCIL_SIZE),
+    X(EGL_CONFIG_CAVEAT),
+    X(EGL_CONFIG_ID),
+    X(EGL_LEVEL),
+    X(EGL_MAX_PBUFFER_HEIGHT),
+    X(EGL_MAX_PBUFFER_PIXELS),
+    X(EGL_MAX_PBUFFER_WIDTH),
+    X(EGL_NATIVE_RENDERABLE),
+    X(EGL_NATIVE_VISUAL_ID),
+    X(EGL_NATIVE_VISUAL_TYPE),
+    X(EGL_SAMPLES),
+    X(EGL_SAMPLE_BUFFERS),
+    X(EGL_SURFACE_TYPE),
+    X(EGL_TRANSPARENT_TYPE),
+    X(EGL_TRANSPARENT_RED_VALUE),
+    X(EGL_TRANSPARENT_GREEN_VALUE),
+    X(EGL_TRANSPARENT_BLUE_VALUE),
+    X(EGL_BIND_TO_TEXTURE_RGB),
+    X(EGL_BIND_TO_TEXTURE_RGBA),
+    X(EGL_MIN_SWAP_INTERVAL),
+    X(EGL_MAX_SWAP_INTERVAL),
+    X(EGL_LUMINANCE_SIZE),
+    X(EGL_ALPHA_MASK_SIZE),
+    X(EGL_COLOR_BUFFER_TYPE),
+    X(EGL_RENDERABLE_TYPE),
+    X(EGL_CONFORMANT),
+   };
+#undef X
+
+    for (size_t j = 0; j < sizeof(names) / sizeof(names[0]); j++) {
+        EGLint value = -1;
+        EGLint returnVal = eglGetConfigAttrib(dpy, config, names[j].attribute, &value);
+        EGLint error = eglGetError();
+        if (returnVal && error == EGL_SUCCESS) {
+            printf(" %s: ", names[j].name);
+            printf("%d (0x%x)", value, value);
+        }
+    }
+    printf("\n");
+}
+
+int printEGLConfigurations(EGLDisplay dpy) {
+    EGLint numConfig = 0;
+    EGLint returnVal = eglGetConfigs(dpy, NULL, 0, &numConfig);
+    checkEglError("eglGetConfigs", returnVal);
+    if (!returnVal) {
+        return false;
+    }
+
+    printf("Number of EGL configuration: %d\n", numConfig);
+
+    EGLConfig* configs = (EGLConfig*) malloc(sizeof(EGLConfig) * numConfig);
+    if (! configs) {
+        printf("Could not allocate configs.\n");
+        return false;
+    }
+
+    returnVal = eglGetConfigs(dpy, configs, numConfig, &numConfig);
+    checkEglError("eglGetConfigs", returnVal);
+    if (!returnVal) {
+        free(configs);
+        return false;
+    }
+
+    for(int i = 0; i < numConfig; i++) {
+        printf("Configuration %d\n", i);
+        printEGLConfiguration(dpy, configs[i]);
+    }
+
+    free(configs);
+    return true;
+}
+
+int main(int argc, char** argv) {
+    EGLBoolean returnValue;
+    EGLConfig myConfig = {0};
+
+    EGLint context_attribs[] = { EGL_CONTEXT_CLIENT_VERSION, 2, EGL_NONE };
+    EGLint s_configAttribs[] = {
+            EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
+            EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
+            EGL_RED_SIZE, 8,
+            EGL_GREEN_SIZE, 8,
+            EGL_BLUE_SIZE, 8,
+            EGL_ALPHA_SIZE, 8,
+            EGL_NONE };
+    EGLint majorVersion;
+    EGLint minorVersion;
+    EGLContext context;
+    EGLSurface surface;
+    EGLint w, h;
+
+    EGLDisplay dpy;
+
+    checkEglError("<init>");
+    dpy = eglGetDisplay(EGL_DEFAULT_DISPLAY);
+    checkEglError("eglGetDisplay");
+    if (dpy == EGL_NO_DISPLAY) {
+        printf("eglGetDisplay returned EGL_NO_DISPLAY.\n");
+        return 0;
+    }
+
+    returnValue = eglInitialize(dpy, &majorVersion, &minorVersion);
+    checkEglError("eglInitialize", returnValue);
+    fprintf(stderr, "EGL version %d.%d\n", majorVersion, minorVersion);
+    if (returnValue != EGL_TRUE) {
+        printf("eglInitialize failed\n");
+        return 0;
+    }
+
+    if (!printEGLConfigurations(dpy)) {
+        printf("printEGLConfigurations failed\n");
+        return 0;
+    }
+
+    checkEglError("printEGLConfigurations");
+
+    EGLNativeWindowType window = android_createDisplaySurface();
+    EGLint numConfigs = -1, n = 0;
+    eglChooseConfig(dpy, s_configAttribs, 0, 0, &numConfigs);
+    if (numConfigs) {
+        EGLConfig* const configs = new EGLConfig[numConfigs];
+        eglChooseConfig(dpy, s_configAttribs, configs, numConfigs, &n);
+        myConfig = configs[0];
+        delete[] configs;
+    }
+
+    checkEglError("EGLUtils::selectConfigForNativeWindow");
+
+    printf("Chose this configuration:\n");
+    printEGLConfiguration(dpy, myConfig);
+
+    surface = eglCreateWindowSurface(dpy, myConfig, window, NULL);
+    checkEglError("eglCreateWindowSurface");
+    if (surface == EGL_NO_SURFACE) {
+        printf("gelCreateWindowSurface failed.\n");
+        return 0;
+    }
+
+    context = eglCreateContext(dpy, myConfig, EGL_NO_CONTEXT, context_attribs);
+    checkEglError("eglCreateContext");
+    if (context == EGL_NO_CONTEXT) {
+        printf("eglCreateContext failed\n");
+        return 0;
+    }
+    returnValue = eglMakeCurrent(dpy, surface, surface, context);
+    checkEglError("eglMakeCurrent", returnValue);
+    if (returnValue != EGL_TRUE) {
+        return 0;
+    }
+    eglQuerySurface(dpy, surface, EGL_WIDTH, &w);
+    checkEglError("eglQuerySurface");
+    eglQuerySurface(dpy, surface, EGL_HEIGHT, &h);
+    checkEglError("eglQuerySurface");
+    GLint dim = w < h ? w : h;
+
+    fprintf(stderr, "Window dimensions: %d x %d\n", w, h);
+
+    printGLString("Version", GL_VERSION);
+    printGLString("Vendor", GL_VENDOR);
+    printGLString("Renderer", GL_RENDERER);
+    printGLString("Extensions", GL_EXTENSIONS);
+
+    if(!setupGraphics(w, h)) {
+        fprintf(stderr, "Could not set up graphics.\n");
+        return 0;
+    }
+
+    for (;;) {
+        renderFrame(w, h);
+        eglSwapBuffers(dpy, surface);
+        checkEglError("eglSwapBuffers");
+    }
+
+    return 0;
+}
diff --git a/services/surfaceflinger/Layer.cpp b/services/surfaceflinger/Layer.cpp
index f3b6c4d..e0268fa 100644
--- a/services/surfaceflinger/Layer.cpp
+++ b/services/surfaceflinger/Layer.cpp
@@ -44,10 +44,6 @@
 
 namespace android {
 
-template <typename T> inline T min(T a, T b) {
-    return a<b ? a : b;
-}
-
 // ---------------------------------------------------------------------------
 
 Layer::Layer(SurfaceFlinger* flinger,
@@ -56,14 +52,14 @@
         mTextureName(-1U),
         mQueuedFrames(0),
         mCurrentTransform(0),
+        mCurrentScalingMode(NATIVE_WINDOW_SCALING_MODE_FREEZE),
         mCurrentOpacity(true),
         mFormat(PIXEL_FORMAT_NONE),
         mGLExtensions(GLExtensions::getInstance()),
         mOpaqueLayer(true),
         mNeedsDithering(false),
         mSecure(false),
-        mProtectedByApp(false),
-        mFixedSize(false)
+        mProtectedByApp(false)
 {
     mCurrentCrop.makeInvalid();
     glGenTextures(1, &mTextureName);
@@ -400,14 +396,7 @@
 }
 
 bool Layer::isFixedSize() const {
-    Mutex::Autolock _l(mLock);
-    return mFixedSize;
-}
-
-void Layer::setFixedSize(bool fixedSize)
-{
-    Mutex::Autolock _l(mLock);
-    mFixedSize = fixedSize;
+    return mCurrentScalingMode != NATIVE_WINDOW_SCALING_MODE_FREEZE;
 }
 
 bool Layer::isCropped() const {
@@ -437,9 +426,14 @@
 
         const Rect crop(mSurfaceTexture->getCurrentCrop());
         const uint32_t transform(mSurfaceTexture->getCurrentTransform());
-        if ((crop != mCurrentCrop) || (transform != mCurrentTransform)) {
+        const uint32_t scalingMode(mSurfaceTexture->getCurrentScalingMode());
+        if ((crop != mCurrentCrop) ||
+            (transform != mCurrentTransform) ||
+            (scalingMode != mCurrentScalingMode))
+        {
             mCurrentCrop = crop;
             mCurrentTransform = transform;
+            mCurrentScalingMode = scalingMode;
             mFlinger->invalidateHwcGeometry();
         }
 
@@ -459,13 +453,22 @@
         // FIXME: mPostedDirtyRegion = dirty & bounds
         mPostedDirtyRegion.set(front.w, front.h);
 
-        sp<GraphicBuffer> newFrontBuffer(mActiveBuffer);
-        if ((newFrontBuffer->getWidth()  == front.requested_w &&
-            newFrontBuffer->getHeight() == front.requested_h) ||
-            isFixedSize())
+
+        if ((front.w != front.requested_w) ||
+            (front.h != front.requested_h))
         {
-            if ((front.w != front.requested_w) ||
-                (front.h != front.requested_h))
+            // check that we received a buffer of the right size
+            // (Take the buffer's orientation into account)
+            sp<GraphicBuffer> newFrontBuffer(mActiveBuffer);
+            uint32_t bufWidth  = newFrontBuffer->getWidth();
+            uint32_t bufHeight = newFrontBuffer->getHeight();
+            if (mCurrentTransform & Transform::ROT_90) {
+                swap(bufWidth, bufHeight);
+            }
+
+            if (isFixedSize() ||
+                    (bufWidth == front.requested_w &&
+                    bufHeight == front.requested_h))
             {
                 // Here we pretend the transaction happened by updating the
                 // current and drawing states. Drawing state is only accessed
@@ -485,10 +488,10 @@
 
                 // 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();
+            }
         }
     }
 }
diff --git a/services/surfaceflinger/Layer.h b/services/surfaceflinger/Layer.h
index e3fc13d..ddfc666 100644
--- a/services/surfaceflinger/Layer.h
+++ b/services/surfaceflinger/Layer.h
@@ -59,7 +59,6 @@
     status_t setBuffers(uint32_t w, uint32_t h, 
             PixelFormat format, uint32_t flags=0);
 
-    // Set this Layer's buffers size
     bool isFixedSize() const;
 
     // LayerBase interface
@@ -88,7 +87,6 @@
     void onFrameQueued();
     virtual sp<ISurface> createSurface();
     uint32_t getEffectiveUsage(uint32_t usage) const;
-    void setFixedSize(bool fixedSize);
     bool isCropped() const;
     static bool getOpacityForFormat(uint32_t format);
 
@@ -106,6 +104,7 @@
     GLfloat mTextureMatrix[16];
     Rect mCurrentCrop;
     uint32_t mCurrentTransform;
+    uint32_t mCurrentScalingMode;
     bool mCurrentOpacity;
 
     // constants
@@ -124,7 +123,6 @@
 
     // binder thread, transaction thread
     mutable Mutex mLock;
-    bool mFixedSize;
 };
 
 // ---------------------------------------------------------------------------
diff --git a/services/surfaceflinger/SurfaceTextureLayer.cpp b/services/surfaceflinger/SurfaceTextureLayer.cpp
index 60fa965..11f61cc 100644
--- a/services/surfaceflinger/SurfaceTextureLayer.cpp
+++ b/services/surfaceflinger/SurfaceTextureLayer.cpp
@@ -52,6 +52,20 @@
     return res;
 }
 
+status_t SurfaceTextureLayer::queueBuffer(int buf, int64_t timestamp,
+        uint32_t* outWidth, uint32_t* outHeight, uint32_t* outTransform) {
+
+    status_t res = SurfaceTexture::queueBuffer(buf, timestamp,
+            outWidth, outHeight, outTransform);
+
+    sp<Layer> layer(mLayer.promote());
+    if (layer != NULL) {
+        *outTransform = layer->getOrientation();
+    }
+
+    return res;
+}
+
 status_t SurfaceTextureLayer::dequeueBuffer(int *buf,
         uint32_t w, uint32_t h, uint32_t format, uint32_t usage) {
 
@@ -64,9 +78,6 @@
         //LOGD("%s, w=%u, h=%u, format=%u, usage=%08x, effectiveUsage=%08x",
         //        __PRETTY_FUNCTION__, w, h, format, usage, effectiveUsage);
         res = SurfaceTexture::dequeueBuffer(buf, w, h, format, effectiveUsage);
-        if (res == NO_ERROR) {
-            layer->setFixedSize(w && h);
-        }
     }
     return res;
 }
diff --git a/services/surfaceflinger/SurfaceTextureLayer.h b/services/surfaceflinger/SurfaceTextureLayer.h
index 7faff54..29a9cbe 100644
--- a/services/surfaceflinger/SurfaceTextureLayer.h
+++ b/services/surfaceflinger/SurfaceTextureLayer.h
@@ -45,6 +45,9 @@
     virtual status_t setBufferCount(int bufferCount);
 
 protected:
+    virtual status_t queueBuffer(int buf, int64_t timestamp,
+            uint32_t* outWidth, uint32_t* outHeight, uint32_t* outTransform);
+
     virtual status_t dequeueBuffer(int *buf, uint32_t w, uint32_t h,
             uint32_t format, uint32_t usage);
 };
diff --git a/services/surfaceflinger/Transform.cpp b/services/surfaceflinger/Transform.cpp
index 4cedcbf..24d5f9a 100644
--- a/services/surfaceflinger/Transform.cpp
+++ b/services/surfaceflinger/Transform.cpp
@@ -20,6 +20,7 @@
 #include <utils/String8.h>
 #include <ui/Region.h>
 
+#include "clz.h"
 #include "Transform.h"
 
 // ---------------------------------------------------------------------------
@@ -28,42 +29,6 @@
 
 // ---------------------------------------------------------------------------
 
-template <typename T>
-static inline T min(T a, T b) {
-    return a<b ? a : b;
-}
-template <typename T>
-static inline T min(T a, T b, T c) {
-    return min(a, min(b, c));
-}
-template <typename T>
-static inline T min(T a, T b, T c, T d) {
-    return min(a, b, min(c, d));
-}
-
-template <typename T>
-static inline T max(T a, T b) {
-    return a>b ? a : b;
-}
-template <typename T>
-static inline T max(T a, T b, T c) {
-    return max(a, max(b, c));
-}
-template <typename T>
-static inline T max(T a, T b, T c, T d) {
-    return max(a, b, max(c, d));
-}
-
-template <typename T>
-static inline
-void swap(T& a, T& b) {
-    T t(a);
-    a = b;
-    b = t;
-}
-
-// ---------------------------------------------------------------------------
-
 Transform::Transform() {
     reset();
 }
diff --git a/services/surfaceflinger/clz.h b/services/surfaceflinger/clz.h
index ca44555..a4c5262 100644
--- a/services/surfaceflinger/clz.h
+++ b/services/surfaceflinger/clz.h
@@ -24,6 +24,41 @@
     return __builtin_clz(x);
 }
 
+template <typename T>
+static inline T min(T a, T b) {
+    return a<b ? a : b;
+}
+template <typename T>
+static inline T min(T a, T b, T c) {
+    return min(a, min(b, c));
+}
+template <typename T>
+static inline T min(T a, T b, T c, T d) {
+    return min(a, b, min(c, d));
+}
+
+template <typename T>
+static inline T max(T a, T b) {
+    return a>b ? a : b;
+}
+template <typename T>
+static inline T max(T a, T b, T c) {
+    return max(a, max(b, c));
+}
+template <typename T>
+static inline T max(T a, T b, T c, T d) {
+    return max(a, b, max(c, d));
+}
+
+template <typename T>
+static inline
+void swap(T& a, T& b) {
+    T t(a);
+    a = b;
+    b = t;
+}
+
+
 }; // namespace android
 
 #endif /* ANDROID_SURFACE_FLINGER_CLZ_H */