diff --git a/libs/surfaceflinger/LayerOrientationAnimRotate.cpp b/libs/surfaceflinger/LayerOrientationAnimRotate.cpp
new file mode 100644
index 0000000..12d5d80
--- /dev/null
+++ b/libs/surfaceflinger/LayerOrientationAnimRotate.cpp
@@ -0,0 +1,274 @@
+/*
+ * 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 "SurfaceFlinger"
+
+#include <stdlib.h>
+#include <stdint.h>
+#include <sys/types.h>
+
+#include <utils/Errors.h>
+#include <utils/Log.h>
+
+#include <core/SkBitmap.h>
+
+#include <ui/EGLDisplaySurface.h>
+
+#include "LayerBase.h"
+#include "LayerOrientationAnim.h"
+#include "LayerOrientationAnimRotate.h"
+#include "SurfaceFlinger.h"
+#include "DisplayHardware/DisplayHardware.h"
+#include "OrientationAnimation.h"
+
+namespace android {
+// ---------------------------------------------------------------------------
+
+const uint32_t LayerOrientationAnimRotate::typeInfo = LayerBase::typeInfo | 0x100;
+const char* const LayerOrientationAnimRotate::typeID = "LayerOrientationAnimRotate";
+
+// ---------------------------------------------------------------------------
+
+const float ROTATION = M_PI * 0.5f;
+const float ROTATION_FACTOR = 1.0f; // 1.0 or 2.0
+const float DURATION = ms2ns(200);
+const float BOUNCES_PER_SECOND = 0.8;
+const float BOUNCES_AMPLITUDE = (5.0f/180.f) * M_PI;
+
+LayerOrientationAnimRotate::LayerOrientationAnimRotate(
+        SurfaceFlinger* flinger, DisplayID display, 
+        OrientationAnimation* anim, 
+        const LayerBitmap& bitmap,
+        const LayerBitmap& bitmapIn)
+    : LayerOrientationAnimBase(flinger, display), mAnim(anim), 
+      mBitmap(bitmap), mBitmapIn(bitmapIn), 
+      mTextureName(-1), mTextureNameIn(-1)
+{
+    mStartTime = systemTime();
+    mFinishTime = 0;
+    mOrientationCompleted = false;
+    mFirstRedraw = false;
+    mLastNormalizedTime = 0;
+    mLastAngle = 0;
+    mLastScale = 0;
+    mNeedsBlending = false;
+}
+
+LayerOrientationAnimRotate::~LayerOrientationAnimRotate()
+{
+    if (mTextureName != -1U) {
+        LayerBase::deletedTextures.add(mTextureName);
+    }
+    if (mTextureNameIn != -1U) {
+        LayerBase::deletedTextures.add(mTextureNameIn);
+    }
+}
+
+bool LayerOrientationAnimRotate::needsBlending() const 
+{
+    return mNeedsBlending; 
+}
+
+Point LayerOrientationAnimRotate::getPhysicalSize() const
+{
+    const GraphicPlane& plane(graphicPlane(0));
+    const DisplayHardware& hw(plane.displayHardware());
+    return Point(hw.getWidth(), hw.getHeight());
+}
+
+void LayerOrientationAnimRotate::validateVisibility(const Transform&)
+{
+    const Layer::State& s(drawingState());
+    const Transform tr(s.transform);
+    const Point size(getPhysicalSize());
+    uint32_t w = size.x;
+    uint32_t h = size.y;
+    mTransformedBounds = tr.makeBounds(w, h);
+    mLeft = tr.tx();
+    mTop  = tr.ty();
+    transparentRegionScreen.clear();
+    mTransformed = true;
+    mCanUseCopyBit = false;
+}
+
+void LayerOrientationAnimRotate::onOrientationCompleted()
+{
+    mFinishTime = systemTime();
+    mOrientationCompleted = true;
+    mFirstRedraw = true;
+    mNeedsBlending = true;
+    mFlinger->invalidateLayerVisibility(this);
+}
+
+void LayerOrientationAnimRotate::onDraw(const Region& clip) const
+{
+    // Animation...
+
+    // FIXME: works only for portrait framebuffers
+    const Point size(getPhysicalSize());
+    const float TARGET_SCALE = size.x * (1.0f / size.y);
+    
+    const nsecs_t now = systemTime();
+    float angle, scale, alpha;
+    
+    if (mOrientationCompleted) {
+        if (mFirstRedraw) {
+            // make a copy of what's on screen
+            copybit_image_t image;
+            mBitmapIn.getBitmapSurface(&image);
+            const DisplayHardware& hw(graphicPlane(0).displayHardware());
+            hw.copyBackToImage(image);
+            
+            // FIXME: code below is gross
+            mFirstRedraw = false; 
+            mNeedsBlending = false;
+            LayerOrientationAnimRotate* self(const_cast<LayerOrientationAnimRotate*>(this));
+            mFlinger->invalidateLayerVisibility(self);
+        }
+
+        // make sure pick-up where we left off
+        const float duration = DURATION * mLastNormalizedTime;
+        const float normalizedTime = (float(now - mFinishTime) / duration);
+        if (normalizedTime <= 1.0f) {
+            const float squaredTime = normalizedTime*normalizedTime;
+            angle = (ROTATION*ROTATION_FACTOR - mLastAngle)*squaredTime + mLastAngle;
+            scale = (1.0f - mLastScale)*squaredTime + mLastScale;
+            alpha = normalizedTime;
+        } else {
+            mAnim->onAnimationFinished();
+            angle = ROTATION;
+            alpha = 1.0f;
+            scale = 1.0f;
+        }
+    } else {
+        const float normalizedTime = float(now - mStartTime) / DURATION;
+        if (normalizedTime <= 1.0f) {
+            mLastNormalizedTime = normalizedTime;
+            const float squaredTime = normalizedTime*normalizedTime;
+            angle = ROTATION * squaredTime;
+            scale = (TARGET_SCALE - 1.0f)*squaredTime + 1.0f;
+            alpha = 0;
+        } else {
+            mLastNormalizedTime = 1.0f;
+            angle = ROTATION;
+            if (BOUNCES_AMPLITUDE) {
+                const float to_seconds = DURATION / seconds(1);
+                const float phi = BOUNCES_PER_SECOND * 
+                (((normalizedTime - 1.0f) * to_seconds)*M_PI*2);
+                angle += BOUNCES_AMPLITUDE * sinf(phi);
+            }
+            scale = TARGET_SCALE;
+            alpha = 0;
+        }
+        mLastAngle = angle;
+        mLastScale = scale;
+    }
+    drawScaled(angle, scale, alpha);
+}
+
+void LayerOrientationAnimRotate::drawScaled(float f, float s, float alpha) const
+{
+    copybit_image_t dst;
+    const GraphicPlane& plane(graphicPlane(0));
+    const DisplayHardware& hw(plane.displayHardware());
+    hw.getDisplaySurface(&dst);
+
+    // clear screen
+    // TODO: with update on demand, we may be able 
+    // to not erase the screen at all during the animation 
+    glDisable(GL_BLEND);
+    glDisable(GL_DITHER);
+    glDisable(GL_SCISSOR_TEST);
+    glClearColor(0,0,0,0);
+    glClear(GL_COLOR_BUFFER_BIT);
+    
+    const int w = dst.w; 
+    const int h = dst.h; 
+
+    copybit_image_t src;
+    mBitmap.getBitmapSurface(&src);
+    const copybit_rect_t srect = { 0, 0, src.w, src.h };
+
+
+    GGLSurface t;
+    t.version = sizeof(GGLSurface);
+    t.width  = src.w;
+    t.height = src.h;
+    t.stride = src.w;
+    t.vstride= src.h;
+    t.format = src.format;
+    t.data = (GGLubyte*)(intptr_t(src.base) + src.offset);
+
+    const int targetOrientation = plane.getOrientation(); 
+    if (!targetOrientation) {
+        f = -f;
+    }
+
+    Transform tr;
+    tr.set(f, w*0.5f, h*0.5f);
+    tr.scale(s, w*0.5f, h*0.5f);
+
+    // FIXME: we should not access mVertices and mDrawingState like that,
+    // but since we control the animation, we know it's going to work okay.
+    // eventually we'd need a more formal way of doing things like this.
+    LayerOrientationAnimRotate& self(const_cast<LayerOrientationAnimRotate&>(*this));
+    tr.transform(self.mVertices[0], 0, 0);
+    tr.transform(self.mVertices[1], 0, src.h);
+    tr.transform(self.mVertices[2], src.w, src.h);
+    tr.transform(self.mVertices[3], src.w, 0);
+
+    if (!(mFlags & DisplayHardware::SLOW_CONFIG)) {
+        // Too slow to do this in software
+        self.mDrawingState.flags |= ISurfaceComposer::eLayerFilter;
+    }
+
+    if (UNLIKELY(mTextureName == -1LU)) {
+        mTextureName = createTexture();
+        GLuint w=0, h=0;
+        const Region dirty(Rect(t.width, t.height));
+        loadTexture(dirty, mTextureName, t, w, h);
+    }
+    self.mDrawingState.alpha = 255; //-int(alpha*255);
+    const Region clip(Rect( srect.l, srect.t, srect.r, srect.b ));
+    drawWithOpenGL(clip, mTextureName, t);
+    
+    if (alpha > 0) {
+        const float sign = (!targetOrientation) ? 1.0f : -1.0f;
+        tr.set(f + sign*(M_PI * 0.5f * ROTATION_FACTOR), w*0.5f, h*0.5f);
+        tr.scale(s, w*0.5f, h*0.5f);
+        tr.transform(self.mVertices[0], 0, 0);
+        tr.transform(self.mVertices[1], 0, src.h);
+        tr.transform(self.mVertices[2], src.w, src.h);
+        tr.transform(self.mVertices[3], src.w, 0);
+
+        copybit_image_t src;
+        mBitmapIn.getBitmapSurface(&src);
+        t.data = (GGLubyte*)(intptr_t(src.base) + src.offset);
+        if (UNLIKELY(mTextureNameIn == -1LU)) {
+            mTextureNameIn = createTexture();
+            GLuint w=0, h=0;
+            const Region dirty(Rect(t.width, t.height));
+            loadTexture(dirty, mTextureNameIn, t, w, h);
+        }
+        self.mDrawingState.alpha = int(alpha*255);
+        const Region clip(Rect( srect.l, srect.t, srect.r, srect.b ));
+        drawWithOpenGL(clip, mTextureNameIn, t);
+    }
+}
+
+// ---------------------------------------------------------------------------
+
+}; // namespace android