diff --git a/libs/surfaceflinger/DisplayHardware/DisplayHardware.cpp b/libs/surfaceflinger/DisplayHardware/DisplayHardware.cpp
index ab02fa0..1abfd68 100644
--- a/libs/surfaceflinger/DisplayHardware/DisplayHardware.cpp
+++ b/libs/surfaceflinger/DisplayHardware/DisplayHardware.cpp
@@ -14,8 +14,6 @@
  * limitations under the License.
  */
 
-#define LOG_TAG "SurfaceFlinger"
-
 #include <stdlib.h>
 #include <stdio.h>
 #include <string.h>
@@ -23,63 +21,50 @@
 
 #include <cutils/properties.h>
 
+#include <utils/RefBase.h>
 #include <utils/Log.h>
 
-#include <ui/EGLDisplaySurface.h>
+#include <ui/PixelFormat.h>
+#include <ui/FramebufferNativeWindow.h>
+#include <ui/EGLUtils.h>
 
 #include <GLES/gl.h>
+#include <EGL/egl.h>
 #include <EGL/eglext.h>
 
+#include <pixelflinger/pixelflinger.h>
 
 #include "DisplayHardware/DisplayHardware.h"
 
 #include <hardware/copybit.h>
 #include <hardware/overlay.h>
+#include <hardware/gralloc.h>
 
 using namespace android;
 
-static __attribute__((noinline))
-const char *egl_strerror(EGLint err)
-{
-    switch (err){
-        case EGL_SUCCESS:           return "EGL_SUCCESS";
-        case EGL_NOT_INITIALIZED:   return "EGL_NOT_INITIALIZED";
-        case EGL_BAD_ACCESS:        return "EGL_BAD_ACCESS";
-        case EGL_BAD_ALLOC:         return "EGL_BAD_ALLOC";
-        case EGL_BAD_ATTRIBUTE:     return "EGL_BAD_ATTRIBUTE";
-        case EGL_BAD_CONFIG:        return "EGL_BAD_CONFIG";
-        case EGL_BAD_CONTEXT:       return "EGL_BAD_CONTEXT";
-        case EGL_BAD_CURRENT_SURFACE: return "EGL_BAD_CURRENT_SURFACE";
-        case EGL_BAD_DISPLAY:       return "EGL_BAD_DISPLAY";
-        case EGL_BAD_MATCH:         return "EGL_BAD_MATCH";
-        case EGL_BAD_NATIVE_PIXMAP: return "EGL_BAD_NATIVE_PIXMAP";
-        case EGL_BAD_NATIVE_WINDOW: return "EGL_BAD_NATIVE_WINDOW";
-        case EGL_BAD_PARAMETER:     return "EGL_BAD_PARAMETER";
-        case EGL_BAD_SURFACE:       return "EGL_BAD_SURFACE";
-        case EGL_CONTEXT_LOST:      return "EGL_CONTEXT_LOST";
-        default: return "UNKNOWN";
-    }
-}
 
 static __attribute__((noinline))
 void checkGLErrors()
 {
-    GLenum error = glGetError();
-    if (error != GL_NO_ERROR)
+    do {
+        // there could be more than one error flag
+        GLenum error = glGetError();
+        if (error == GL_NO_ERROR)
+            break;
         LOGE("GL error 0x%04x", int(error));
+    } while(true);
 }
 
 static __attribute__((noinline))
 void checkEGLErrors(const char* token)
 {
     EGLint error = eglGetError();
-    // GLESonGL seems to be returning 0 when there is no errors?
-    if (error && error != EGL_SUCCESS)
-        LOGE("%s error 0x%04x (%s)",
-                token, int(error), egl_strerror(error));
+    if (error && error != EGL_SUCCESS) {
+        LOGE("%s: EGL error 0x%04x (%s)",
+                token, int(error), EGLUtils::strerror(error));
+    }
 }
 
-
 /*
  * Initialize the display to the specified values.
  *
@@ -108,20 +93,37 @@
 
 void DisplayHardware::init(uint32_t dpy)
 {
+    mNativeWindow = new FramebufferNativeWindow();
+    framebuffer_device_t const * fbDev = mNativeWindow->getDevice();
+
+    mOverlayEngine = NULL;
+    hw_module_t const* module;
+    if (hw_get_module(OVERLAY_HARDWARE_MODULE_ID, &module) == 0) {
+        overlay_control_open(module, &mOverlayEngine);
+    }
+
     // initialize EGL
-    const EGLint attribs[] = {
-            EGL_RED_SIZE,       5,
-            EGL_GREEN_SIZE,     6,
-            EGL_BLUE_SIZE,      5,
-            EGL_DEPTH_SIZE,     0,
+    EGLint attribs[] = {
+            EGL_SURFACE_TYPE,   EGL_WINDOW_BIT,
+            EGL_NONE,           0,
             EGL_NONE
     };
+
+    // debug: disable h/w rendering
+    char property[PROPERTY_VALUE_MAX];
+    if (property_get("debug.sf.hw", property, NULL) > 0) {
+        if (atoi(property) == 0) {
+            LOGW("H/W composition disabled");
+            attribs[2] = EGL_CONFIG_CAVEAT;
+            attribs[3] = EGL_SLOW_CONFIG;
+        }
+    }
+
     EGLint w, h, dummy;
-    EGLint numConfigs, n;
-    EGLConfig config;
+    EGLint numConfigs=0;
     EGLSurface surface;
     EGLContext context;
-    mFlags = 0;
+    mFlags = CACHED_BUFFERS;
 
     // TODO: all the extensions below should be queried through
     // eglGetProcAddress().
@@ -129,7 +131,17 @@
     EGLDisplay display = eglGetDisplay(EGL_DEFAULT_DISPLAY);
     eglInitialize(display, NULL, NULL);
     eglGetConfigs(display, NULL, 0, &numConfigs);
-    eglChooseConfig(display, attribs, &config, 1, &n);
+
+    EGLConfig config;
+    status_t err = EGLUtils::selectConfigForNativeWindow(
+            display, attribs, mNativeWindow.get(), &config);
+    LOGE_IF(err, "couldn't find an EGLConfig matching the screen format");
+    
+    EGLint r,g,b,a;
+    eglGetConfigAttrib(display, config, EGL_RED_SIZE,   &r);
+    eglGetConfigAttrib(display, config, EGL_GREEN_SIZE, &g);
+    eglGetConfigAttrib(display, config, EGL_BLUE_SIZE,  &b);
+    eglGetConfigAttrib(display, config, EGL_ALPHA_SIZE, &a);
 
     /*
      * Gather EGL extensions
@@ -144,13 +156,13 @@
     LOGI("version   : %s", eglQueryString(display, EGL_VERSION));
     LOGI("extensions: %s", egl_extensions);
     LOGI("Client API: %s", eglQueryString(display, EGL_CLIENT_APIS)?:"Not Supported");
-
-    // TODO: get this from the devfb driver (probably should be HAL module)
-    mFlags |= SWAP_RECTANGLE_EXTENSION;
+    LOGI("EGLSurface: %d-%d-%d-%d, config=%p", r, g, b, a, config);
     
-    // TODO: get the real "update_on_demand" behavior (probably should be HAL module)
-    mFlags |= UPDATE_ON_DEMAND;
 
+    if (mNativeWindow->isUpdateOnDemand()) {
+        mFlags |= PARTIAL_UPDATES;
+    }
+    
     if (eglGetConfigAttrib(display, config, EGL_CONFIG_CAVEAT, &dummy) == EGL_TRUE) {
         if (dummy == EGL_SLOW_CONFIG)
             mFlags |= SLOW_CONFIG;
@@ -160,37 +172,48 @@
      * Create our main surface
      */
 
-    mDisplaySurface = new EGLDisplaySurface();
+    surface = eglCreateWindowSurface(display, config, mNativeWindow.get(), NULL);
 
-    surface = eglCreateWindowSurface(display, config, mDisplaySurface.get(), NULL);
-    //checkEGLErrors("eglCreateDisplaySurfaceANDROID");
+    if (mFlags & PARTIAL_UPDATES) {
+        // if we have partial updates, we definitely don't need to
+        // preserve the backbuffer, which may be costly.
+        eglSurfaceAttrib(display, surface,
+                EGL_SWAP_BEHAVIOR, EGL_BUFFER_DESTROYED);
+    }
 
     if (eglQuerySurface(display, surface, EGL_SWAP_BEHAVIOR, &dummy) == EGL_TRUE) {
         if (dummy == EGL_BUFFER_PRESERVED) {
             mFlags |= BUFFER_PRESERVED;
         }
     }
-    
-    GLint value = EGL_UNKNOWN;
-    eglQuerySurface(display, surface, EGL_HORIZONTAL_RESOLUTION, &value);
-    if (value == EGL_UNKNOWN) {
-        mDpiX = 160.0f;
-    } else {
-        mDpiX = 25.4f * float(value)/EGL_DISPLAY_SCALING;
+
+    eglQuerySurface(display, surface, EGL_WIDTH,  &mWidth);
+    eglQuerySurface(display, surface, EGL_HEIGHT, &mHeight);
+
+#ifdef EGL_ANDROID_swap_rectangle    
+    if (strstr(egl_extensions, "EGL_ANDROID_swap_rectangle")) {
+        if (eglSetSwapRectangleANDROID(display, surface,
+                0, 0, mWidth, mHeight) == EGL_TRUE) {
+            // This could fail if this extension is not supported by this
+            // specific surface (of config)
+            mFlags |= SWAP_RECTANGLE;
+        }
     }
-    value = EGL_UNKNOWN;
-    eglQuerySurface(display, surface, EGL_VERTICAL_RESOLUTION, &value);
-    if (value == EGL_UNKNOWN) {
-        mDpiY = 160.0f;
-    } else {
-        mDpiY = 25.4f * float(value)/EGL_DISPLAY_SCALING;
-    }
-    mRefreshRate = 60.f;    // TODO: get the real refresh rate 
+    // when we have the choice between PARTIAL_UPDATES and SWAP_RECTANGLE
+    // choose PARTIAL_UPDATES, which should be more efficient
+    if (mFlags & PARTIAL_UPDATES)
+        mFlags &= ~SWAP_RECTANGLE;
+#endif
     
+
+    LOGI("flags     : %08x", mFlags);
     
-    char property[PROPERTY_VALUE_MAX];
+    mDpiX = mNativeWindow->xdpi;
+    mDpiY = mNativeWindow->ydpi;
+    mRefreshRate = fbDev->fps; 
+    
     /* Read density from build-specific ro.sf.lcd_density property
-     * except if it is overriden by qemu.sf.lcd_density.
+     * except if it is overridden by qemu.sf.lcd_density.
      */
     if (property_get("qemu.sf.lcd_density", property, NULL) <= 0) {
         if (property_get("ro.sf.lcd_density", property, NULL) <= 0) {
@@ -209,11 +232,6 @@
      */
     
     context = eglCreateContext(display, config, NULL, NULL);
-    //checkEGLErrors("eglCreateContext");
-    
-    eglQuerySurface(display, surface, EGL_WIDTH, &mWidth);
-    eglQuerySurface(display, surface, EGL_HEIGHT, &mHeight);
-    
     
     /*
      * Gather OpenGL ES extensions
@@ -221,21 +239,33 @@
 
     eglMakeCurrent(display, surface, surface, context);
     const char* const  gl_extensions = (const char*)glGetString(GL_EXTENSIONS);
+    const char* const  gl_renderer = (const char*)glGetString(GL_RENDERER);
     LOGI("OpenGL informations:");
     LOGI("vendor    : %s", glGetString(GL_VENDOR));
-    LOGI("renderer  : %s", glGetString(GL_RENDERER));
+    LOGI("renderer  : %s", gl_renderer);
     LOGI("version   : %s", glGetString(GL_VERSION));
     LOGI("extensions: %s", gl_extensions);
 
+    if (strstr(gl_renderer, "PowerVR SGX 530")) {
+        LOGD("Assuming uncached graphics buffers.");
+        mFlags &= ~CACHED_BUFFERS;
+    }
     if (strstr(gl_extensions, "GL_ARB_texture_non_power_of_two")) {
         mFlags |= NPOT_EXTENSION;
     }
     if (strstr(gl_extensions, "GL_OES_draw_texture")) {
         mFlags |= DRAW_TEXTURE_EXTENSION;
     }
-    if (strstr(gl_extensions, "GL_ANDROID_direct_texture")) {
+#ifdef EGL_ANDROID_image_native_buffer
+    if (strstr( gl_extensions, "GL_OES_EGL_image") &&
+        (strstr(egl_extensions, "EGL_KHR_image_base") || 
+                strstr(egl_extensions, "EGL_KHR_image")) &&
+        strstr(egl_extensions, "EGL_ANDROID_image_native_buffer")) {
         mFlags |= DIRECT_TEXTURE;
     }
+#else
+#warning "EGL_ANDROID_image_native_buffer not supported"
+#endif
 
     // Unbind the context from this thread
     eglMakeCurrent(display, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
@@ -244,19 +274,8 @@
     mConfig  = config;
     mSurface = surface;
     mContext = context;
-    mFormat  = GGL_PIXEL_FORMAT_RGB_565;
-    
-    hw_module_t const* module;
-
-    mBlitEngine = NULL;
-    if (hw_get_module(COPYBIT_HARDWARE_MODULE_ID, &module) == 0) {
-        copybit_open(module, &mBlitEngine);
-    }
-
-    mOverlayEngine = NULL;
-    if (hw_get_module(OVERLAY_HARDWARE_MODULE_ID, &module) == 0) {
-        overlay_control_open(module, &mOverlayEngine);
-    }
+    mFormat  = fbDev->format;
+    mPageFlipCount = 0;
 }
 
 /*
@@ -270,7 +289,6 @@
 {
     eglMakeCurrent(mDisplay, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
     eglTerminate(mDisplay);
-    copybit_close(mBlitEngine);
     overlay_control_close(mOverlayEngine);
 }
 
@@ -284,33 +302,13 @@
     DisplayHardwareBase::acquireScreen();
 }
 
-void DisplayHardware::getDisplaySurface(copybit_image_t* img) const
-{
-    img->w      = mDisplaySurface->stride;
-    img->h      = mDisplaySurface->height;
-    img->format = mDisplaySurface->format;
-    img->offset = mDisplaySurface->offset;
-    img->base   = (void*)mDisplaySurface->base;
-    img->fd     = mDisplaySurface->fd;
-}
-
-void DisplayHardware::getDisplaySurface(GGLSurface* fb) const
-{
-    fb->version= sizeof(GGLSurface);
-    fb->width  = mDisplaySurface->width;
-    fb->height = mDisplaySurface->height;
-    fb->stride = mDisplaySurface->stride;
-    fb->format = mDisplaySurface->format;
-    fb->data   = (GGLubyte*)mDisplaySurface->base + mDisplaySurface->offset;
-}
-
 uint32_t DisplayHardware::getPageFlipCount() const {
-    return mDisplaySurface->getPageFlipCount();
+    return mPageFlipCount;
 }
 
-/*
- * "Flip" the front and back buffers.
- */
+status_t DisplayHardware::compositionComplete() const {
+    return mNativeWindow->compositionComplete();
+}
 
 void DisplayHardware::flip(const Region& dirty) const
 {
@@ -319,21 +317,20 @@
     EGLDisplay dpy = mDisplay;
     EGLSurface surface = mSurface;
 
-    Region newDirty(dirty);
-    newDirty.andSelf(Rect(mWidth, mHeight));
-
-    if (mFlags & BUFFER_PRESERVED) {
-        const Region copyback(mDirty.subtract(newDirty));
-        mDirty = newDirty;
-        mDisplaySurface->copyFrontToBack(copyback);
-    } 
-
-    if (mFlags & SWAP_RECTANGLE_EXTENSION) {
-        const Rect& b(newDirty.bounds());
-        mDisplaySurface->setSwapRectangle(
+#ifdef EGL_ANDROID_swap_rectangle    
+    if (mFlags & SWAP_RECTANGLE) {
+        const Region newDirty(dirty.intersect(bounds()));
+        const Rect b(newDirty.getBounds());
+        eglSetSwapRectangleANDROID(dpy, surface,
                 b.left, b.top, b.width(), b.height());
+    } 
+#endif
+    
+    if (mFlags & PARTIAL_UPDATES) {
+        mNativeWindow->setUpdateRectangle(dirty.getBounds());
     }
-
+    
+    mPageFlipCount++;
     eglSwapBuffers(dpy, surface);
     checkEGLErrors("eglSwapBuffers");
 
@@ -351,11 +348,3 @@
 {
     eglMakeCurrent(mDisplay, mSurface, mSurface, mContext);
 }
-
-void DisplayHardware::copyFrontToImage(const copybit_image_t& front) const {
-    mDisplaySurface->copyFrontToImage(front);
-}
-
-void DisplayHardware::copyBackToImage(const copybit_image_t& front) const {
-    mDisplaySurface->copyBackToImage(front);
-}
diff --git a/libs/surfaceflinger/DisplayHardware/DisplayHardware.h b/libs/surfaceflinger/DisplayHardware/DisplayHardware.h
index 550a4d1..6914d0c 100644
--- a/libs/surfaceflinger/DisplayHardware/DisplayHardware.h
+++ b/libs/surfaceflinger/DisplayHardware/DisplayHardware.h
@@ -22,31 +22,36 @@
 #include <ui/PixelFormat.h>
 #include <ui/Region.h>
 
+#include <GLES/gl.h>
+#include <GLES/glext.h>
 #include <EGL/egl.h>
+#include <EGL/eglext.h>
+
+#include <pixelflinger/pixelflinger.h>
 
 #include "DisplayHardware/DisplayHardwareBase.h"
 
 struct overlay_control_device_t;
-struct copybit_device_t;
+struct framebuffer_device_t;
 struct copybit_image_t;
-struct copybit_t;
 
 namespace android {
 
-class EGLDisplaySurface;
+class FramebufferNativeWindow;
 
 class DisplayHardware : public DisplayHardwareBase
 {
 public:
     enum {
         DIRECT_TEXTURE          = 0x00000002,
-        SWAP_RECTANGLE_EXTENSION= 0x00000004,
         COPY_BITS_EXTENSION     = 0x00000008,
         NPOT_EXTENSION          = 0x00000100,
         DRAW_TEXTURE_EXTENSION  = 0x00000200,
         BUFFER_PRESERVED        = 0x00010000,
-        UPDATE_ON_DEMAND        = 0x00020000,   // video driver feature
+        PARTIAL_UPDATES         = 0x00020000,   // video driver feature
         SLOW_CONFIG             = 0x00040000,   // software
+        SWAP_RECTANGLE          = 0x00080000,
+        CACHED_BUFFERS          = 0x00100000
     };
 
     DisplayHardware(
@@ -73,15 +78,11 @@
     void        makeCurrent() const;
 
     uint32_t getPageFlipCount() const;
-    void getDisplaySurface(copybit_image_t* img) const;
-    void getDisplaySurface(GGLSurface* fb) const;
     EGLDisplay getEGLDisplay() const { return mDisplay; }
-    copybit_device_t* getBlitEngine() const { return mBlitEngine; }
     overlay_control_device_t* getOverlayEngine() const { return mOverlayEngine; }
     
-    void copyFrontToImage(const copybit_image_t& front) const;
-    void copyBackToImage(const copybit_image_t& front) const;
-       
+    status_t compositionComplete() const;
+    
     Rect bounds() const {
         return Rect(mWidth, mHeight);
     }
@@ -102,9 +103,9 @@
     int             mHeight;
     PixelFormat     mFormat;
     uint32_t        mFlags;
-    mutable Region  mDirty;
-    sp<EGLDisplaySurface> mDisplaySurface;
-    copybit_device_t*     mBlitEngine;
+    mutable uint32_t mPageFlipCount;
+    
+    sp<FramebufferNativeWindow> mNativeWindow;
     overlay_control_device_t* mOverlayEngine;
 };
 
diff --git a/libs/surfaceflinger/DisplayHardware/DisplayHardwareBase.cpp b/libs/surfaceflinger/DisplayHardware/DisplayHardwareBase.cpp
index f75e5c2..1d09f84 100644
--- a/libs/surfaceflinger/DisplayHardware/DisplayHardwareBase.cpp
+++ b/libs/surfaceflinger/DisplayHardware/DisplayHardwareBase.cpp
@@ -14,8 +14,6 @@
  * limitations under the License.
  */
 
-#define LOG_TAG "SurfaceFlinger"
-
 #include <assert.h>
 #include <errno.h>
 #include <stdlib.h>