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diff --git a/src/gui/painting/qunifiedtoolbarsurface_mac.cpp b/src/gui/painting/qunifiedtoolbarsurface_mac.cpp
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+++ b/src/gui/painting/qunifiedtoolbarsurface_mac.cpp
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+/****************************************************************************
+**
+** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtGui module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights.  These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qunifiedtoolbarsurface_mac_p.h"
+#include <private/qt_cocoa_helpers_mac_p.h>
+#include <private/qbackingstore_p.h>
+#include <private/qmainwindowlayout_p.h>
+
+#include <QDebug>
+
+#ifdef QT_MAC_USE_COCOA
+
+QT_BEGIN_NAMESPACE
+
+QUnifiedToolbarSurface::QUnifiedToolbarSurface(QWidget *widget)
+    : QRasterWindowSurface(widget, false), d_ptr(new QUnifiedToolbarSurfacePrivate)
+{
+    d_ptr->image = 0;
+    d_ptr->inSetGeometry = false;
+    setStaticContentsSupport(true);
+
+    setGeometry(QRect(QPoint(0, 0), QSize(widget->width(), 100))); // FIXME: Fix height.
+}
+
+QUnifiedToolbarSurface::~QUnifiedToolbarSurface()
+{
+    if (d_ptr->image)
+        delete d_ptr->image;
+}
+
+QPaintDevice *QUnifiedToolbarSurface::paintDevice()
+{
+    return &d_ptr->image->image;
+}
+
+void QUnifiedToolbarSurface::recursiveRedirect(QObject *object, const QPoint &offset)
+{
+    if (object != 0) {
+        if (object->isWidgetType()) {
+            QWidget *widget = qobject_cast<QWidget *>(object);
+
+            // We redirect the painting only if the widget is in the same window
+            // and is not a window in itself.
+            if (!(widget->windowType() & Qt::Window)) {
+                widget->d_func()->unifiedSurface = this;
+                widget->d_func()->isInUnifiedToolbar = true;
+                widget->d_func()->toolbar_offset = offset;
+            }
+        }
+
+        for (int i = 0; i < object->children().size(); ++i) {
+            recursiveRedirect(object->children().at(i), offset);
+        }
+    }
+}
+
+void QUnifiedToolbarSurface::insertToolbar(QWidget *toolbar, const QPoint &offset)
+{
+    setGeometry(QRect(QPoint(0, 0), QSize(offset.x() + toolbar->width(), 100))); // FIXME
+    recursiveRedirect(toolbar, offset);
+}
+
+void QUnifiedToolbarSurface::setGeometry(const QRect &rect)
+{
+    QWindowSurface::setGeometry(rect);
+    Q_D(QUnifiedToolbarSurface);
+    d->inSetGeometry = true;
+    if (d->image == 0 || d->image->width() < rect.width() || d->image->height() < rect.height())
+            prepareBuffer(QImage::Format_ARGB32_Premultiplied, window());
+    d->inSetGeometry = false;
+
+    // FIXME: set unified toolbar height.
+}
+
+void QUnifiedToolbarSurface::beginPaint(const QRegion &rgn)
+{
+    QPainter p(&d_ptr->image->image);
+    p.setCompositionMode(QPainter::CompositionMode_Source);
+    const QVector<QRect> rects = rgn.rects();
+    const QColor blank = Qt::transparent;
+    for (QVector<QRect>::const_iterator it = rects.begin(); it != rects.end(); ++it) {
+        p.fillRect(*it, blank);
+    }
+}
+
+void QUnifiedToolbarSurface::updateToolbarOffset(QWidget *widget)
+{
+    QMainWindowLayout *mlayout = qobject_cast<QMainWindowLayout*> (widget->window()->layout());
+    mlayout->updateUnifiedToolbarOffset();
+}
+
+void QUnifiedToolbarSurface::flush(QWidget *widget, const QRegion &rgn, const QPoint &offset)
+{
+    Q_D(QUnifiedToolbarSurface);
+
+    QRegion flushingRegion(widget->rect());
+
+    if (!d->image || rgn.rectCount() == 0) {
+        return;
+    }
+
+    Q_UNUSED(offset);
+
+    // Get a context for the widget.
+    CGContextRef context;
+    if (!(widget->d_func()->hasOwnContext)) {
+        widget->d_func()->ut_rg = rgn;
+        widget->d_func()->ut_pt = offset;
+        qt_mac_display(widget);
+        return;
+    } else {
+        // We render the content of the toolbar in the surface.
+        updateToolbarOffset(widget);
+        QRect beginPaintRect(widget->d_func()->toolbar_offset.x(), widget->d_func()->toolbar_offset.y(), widget->geometry().width(), widget->geometry().height());
+        QRegion beginPaintRegion(beginPaintRect);
+
+        context = widget->d_func()->cgContext;
+        beginPaint(beginPaintRegion);
+        widget->render(widget->d_func()->unifiedSurface->paintDevice(), widget->d_func()->toolbar_offset, QRegion(), QWidget::DrawChildren);
+    }
+
+    CGContextSaveGState(context);
+
+    int areaX = widget->d_func()->toolbar_offset.x();
+    int areaY = widget->d_func()->toolbar_offset.y();
+    int areaWidth = widget->geometry().width();
+    int areaHeight = widget->geometry().height();
+    const CGRect area = CGRectMake(areaX, areaY, areaWidth, areaHeight);
+
+    // Clip to region.
+    const QVector<QRect> &rects = flushingRegion.rects();
+    for (int i = 0; i < rects.size(); ++i) {
+        const QRect &rect = rects.at(i);
+        CGContextAddRect(context, CGRectMake(rect.x(), rect.y(), rect.width(), rect.height()));
+    }
+    CGContextAddRect(context, area);
+    CGContextClip(context);
+
+
+    CGImageRef image = CGBitmapContextCreateImage(d->image->cg);
+    CGImageRef subImage = CGImageCreateWithImageInRect(image, area);
+
+    const CGRect drawingArea = CGRectMake(0, 0, areaWidth, areaHeight);
+    qt_mac_drawCGImage(context, &drawingArea, subImage);
+
+    CGImageRelease(subImage);
+    CGImageRelease(image);
+
+    CGContextFlush(context);
+
+    // Restore context.
+    CGContextRestoreGState(context);
+    widget->d_func()->hasOwnContext = false;
+}
+
+void QUnifiedToolbarSurface::prepareBuffer(QImage::Format format, QWidget *widget)
+{
+    Q_D(QUnifiedToolbarSurface);
+
+    int width = geometry().width();
+    int height = geometry().height();
+    if (d->image) {
+        width = qMax(d->image->width(), width);
+        height = qMax(d->image->height(), height);
+    }
+
+    if (width == 0 || height == 0) {
+        delete d->image;
+        d->image = 0;
+        return;
+    }
+
+    QNativeImage *oldImage = d->image;
+
+    d->image = new QNativeImage(width, height, format, false, widget);
+
+    if (oldImage && d->inSetGeometry && hasStaticContents()) {
+        // Make sure we use the const version of bits() (no detach).
+        const uchar *src = const_cast<const QImage &>(oldImage->image).bits();
+        uchar *dst = d->image->image.bits();
+
+        const int srcBytesPerLine = oldImage->image.bytesPerLine();
+        const int dstBytesPerLine = d->image->image.bytesPerLine();
+        const int bytesPerPixel = oldImage->image.depth() >> 3;
+
+        QRegion staticRegion(staticContents());
+        // Make sure we're inside the boundaries of the old image.
+        staticRegion &= QRect(0, 0, oldImage->image.width(), oldImage->image.height());
+        const QVector<QRect> &rects = staticRegion.rects();
+        const QRect *srcRect = rects.constData();
+
+        // Copy the static content of the old image into the new one.
+        int numRectsLeft = rects.size();
+        do {
+            const int bytesOffset = srcRect->x() * bytesPerPixel;
+            const int dy = srcRect->y();
+
+            // Adjust src and dst to point to the right offset.
+            const uchar *s = src + dy * srcBytesPerLine + bytesOffset;
+            uchar *d = dst + dy * dstBytesPerLine + bytesOffset;
+            const int numBytes = srcRect->width() * bytesPerPixel;
+
+            int numScanLinesLeft = srcRect->height();
+            do {
+                ::memcpy(d, s, numBytes);
+                d += dstBytesPerLine;
+                s += srcBytesPerLine;
+            } while (--numScanLinesLeft);
+
+            ++srcRect;
+        } while (--numRectsLeft);
+    }
+
+    delete oldImage;
+}
+
+QT_END_NAMESPACE
+
+#endif // QT_MAC_USE_COCOA