diff --git a/libs/surfaceflinger/LayerOrientationAnim.cpp b/libs/surfaceflinger/LayerOrientationAnim.cpp
new file mode 100644
index 0000000..2b72d7c
--- /dev/null
+++ b/libs/surfaceflinger/LayerOrientationAnim.cpp
@@ -0,0 +1,287 @@
+/*
+ * 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 "SurfaceFlinger.h"
+#include "DisplayHardware/DisplayHardware.h"
+#include "OrientationAnimation.h"
+
+namespace android {
+// ---------------------------------------------------------------------------
+
+const uint32_t LayerOrientationAnim::typeInfo = LayerBase::typeInfo | 0x80;
+const char* const LayerOrientationAnim::typeID = "LayerOrientationAnim";
+
+// ---------------------------------------------------------------------------
+
+LayerOrientationAnim::LayerOrientationAnim(
+        SurfaceFlinger* flinger, DisplayID display, 
+        OrientationAnimation* anim, 
+        const LayerBitmap& bitmap,
+        const LayerBitmap& bitmapIn)
+    : LayerBase(flinger, display), mAnim(anim), 
+      mBitmap(bitmap), mBitmapIn(bitmapIn), 
+      mTextureName(-1), mTextureNameIn(-1)
+{
+    mStartTime = systemTime();
+    mFinishTime = 0;
+    mOrientationCompleted = false;
+    mFirstRedraw = false;
+    mLastNormalizedTime = 0;
+    mLastScale = 0;
+    mNeedsBlending = false;
+}
+
+LayerOrientationAnim::~LayerOrientationAnim()
+{
+    if (mTextureName != -1U) {
+        LayerBase::deletedTextures.add(mTextureName);
+    }
+    if (mTextureNameIn != -1U) {
+        LayerBase::deletedTextures.add(mTextureNameIn);
+    }
+}
+
+bool LayerOrientationAnim::needsBlending() const 
+{
+    return mNeedsBlending; 
+}
+
+Point LayerOrientationAnim::getPhysicalSize() const
+{
+    const GraphicPlane& plane(graphicPlane(0));
+    const DisplayHardware& hw(plane.displayHardware());
+    return Point(hw.getWidth(), hw.getHeight());
+}
+
+void LayerOrientationAnim::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;
+    copybit_device_t* copybit = mFlinger->getBlitEngine();
+    if (copybit) { 
+        mCanUseCopyBit = true;
+    }
+}
+
+void LayerOrientationAnim::onOrientationCompleted()
+{
+    mFinishTime = systemTime();
+    mOrientationCompleted = true;
+    mFirstRedraw = true;
+    mNeedsBlending = true;
+    mFlinger->invalidateLayerVisibility(this);
+}
+
+void LayerOrientationAnim::onDraw(const Region& clip) const
+{
+    // Animation...
+    const float MIN_SCALE = 0.5f;
+    const float DURATION = ms2ns(200);
+    const float BOUNCES_PER_SECOND = 1.618f;
+    const float BOUNCES_AMPLITUDE = 1.0f/32.0f;
+
+    const nsecs_t now = systemTime();
+    float scale, alpha;
+    
+    if (mOrientationCompleted) {
+        if (mFirstRedraw) {
+            mFirstRedraw = false;
+            
+            // make a copy of what's on screen
+            copybit_image_t image;
+            mBitmapIn.getBitmapSurface(&image);
+            const DisplayHardware& hw(graphicPlane(0).displayHardware());
+            hw.copyBackToImage(image);
+
+            // and erase the screen for this round
+            glDisable(GL_BLEND);
+            glDisable(GL_DITHER);
+            glDisable(GL_SCISSOR_TEST);
+            glClearColor(0,0,0,0);
+            glClear(GL_COLOR_BUFFER_BIT);
+            
+            // FIXME: code below is gross
+            mNeedsBlending = false;
+            LayerOrientationAnim* self(const_cast<LayerOrientationAnim*>(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;
+            scale = (1.0f - mLastScale)*squaredTime + mLastScale;
+            alpha = (1.0f - normalizedTime);
+            alpha *= alpha;
+            alpha *= alpha;
+        } else {
+            mAnim->onAnimationFinished();
+            scale = 1.0f;
+            alpha = 0.0f;
+        }
+    } else {
+        const float normalizedTime = float(now - mStartTime) / DURATION;
+        if (normalizedTime <= 1.0f) {
+            mLastNormalizedTime = normalizedTime;
+            const float squaredTime = normalizedTime*normalizedTime;
+            scale = (MIN_SCALE-1.0f)*squaredTime + 1.0f;
+            alpha = 1.0f;
+        } else {
+            mLastNormalizedTime = 1.0f;
+            const float to_seconds = DURATION / seconds(1);
+            const float phi = BOUNCES_PER_SECOND * 
+                    (((normalizedTime - 1.0f) * to_seconds)*M_PI*2);
+            scale = MIN_SCALE + BOUNCES_AMPLITUDE * (1.0f - cosf(phi));
+            alpha = 1.0f;
+        }
+        mLastScale = scale;
+    }
+    drawScaled(scale, alpha);
+}
+
+void LayerOrientationAnim::drawScaled(float f, 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 
+    if (!mOrientationCompleted) {
+        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*f; 
+    const int h = dst.h*f; 
+    const int xc = uint32_t(dst.w-w)/2;
+    const int yc = uint32_t(dst.h-h)/2;
+    const copybit_rect_t drect = { xc, yc, xc+w, yc+h }; 
+
+    copybit_image_t src;
+    mBitmap.getBitmapSurface(&src);
+    const copybit_rect_t srect = { 0, 0, src.w, src.h };
+
+    int err = NO_ERROR;
+    const int can_use_copybit = canUseCopybit();
+    if (can_use_copybit)  {
+        copybit_device_t* copybit = mFlinger->getBlitEngine();
+        copybit->set_parameter(copybit, COPYBIT_TRANSFORM, 0);
+        copybit->set_parameter(copybit, COPYBIT_DITHER, COPYBIT_ENABLE);
+
+        if (alpha < 1.0f) {
+            copybit_image_t srcIn;
+            mBitmapIn.getBitmapSurface(&srcIn);
+            region_iterator it(Region(Rect( drect.l, drect.t, drect.r, drect.b )));
+            copybit->set_parameter(copybit, COPYBIT_PLANE_ALPHA, 0xFF);
+            err = copybit->stretch(copybit, &dst, &srcIn, &drect, &srect, &it);
+        }
+
+        if (!err && alpha > 0.0f) {
+            region_iterator it(Region(Rect( drect.l, drect.t, drect.r, drect.b )));
+            copybit->set_parameter(copybit, COPYBIT_PLANE_ALPHA, int(alpha*255));
+            err = copybit->stretch(copybit, &dst, &src, &drect, &srect, &it);
+        }
+        LOGE_IF(err != NO_ERROR, "copybit failed (%s)", strerror(err));
+    }
+    if (!can_use_copybit || err) {   
+        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);
+
+        Transform tr;
+        tr.set(f,0,0,f);
+        tr.set(xc, yc);
+        
+        // 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.
+        LayerOrientationAnim& self(const_cast<LayerOrientationAnim&>(*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 (alpha < 1.0f) {
+            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 = 255;
+            const Region clip(Rect( drect.l, drect.t, drect.r, drect.b ));
+            drawWithOpenGL(clip, mTextureName, t);
+        }
+
+        t.data = (GGLubyte*)(intptr_t(src.base) + src.offset);
+        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 = int(alpha*255);
+        const Region clip(Rect( drect.l, drect.t, drect.r, drect.b ));
+        drawWithOpenGL(clip, mTextureName, t);
+    }
+}
+
+// ---------------------------------------------------------------------------
+
+}; // namespace android