Merge branch '4.7' of scm.dev.nokia.troll.no:qt/qt-qml into 4.7

18 files changed, 435 insertions, 126 deletions

diff --git a/src/gui/egl/qegl_x11.cpp b/src/gui/egl/qegl_x11.cpp
index fea6e8d..15cc109 100644
--- a/src/gui/egl/qegl_x11.cpp
+++ b/src/gui/egl/qegl_x11.cpp
@@ -165,7 +165,7 @@ VisualID QEgl::getCompatibleVisualId(EGLConfig config)
         if (chosenVisualInfo) {
             // Skip size checks if implementation supports non-matching visual
             // and config (http://bugreports.qt.nokia.com/browse/QTBUG-9444).
-            if (QEgl::hasExtension("EGL_NV_post_convert_replication"))
+            if (QEgl::hasExtension("EGL_NV_post_convert_rounding"))
                 return visualId;
 
             int visualRedSize = countBits(chosenVisualInfo->red_mask);
diff --git a/src/gui/itemviews/qabstractitemview.cpp b/src/gui/itemviews/qabstractitemview.cpp
index 97499f3..4ffd284 100644
--- a/src/gui/itemviews/qabstractitemview.cpp
+++ b/src/gui/itemviews/qabstractitemview.cpp
@@ -2270,9 +2270,11 @@ void QAbstractItemView::keyPressEvent(QKeyEvent *event)
             } else {
                 d->selectionModel->setCurrentIndex(newCurrent, command);
                 d->pressedPosition = visualRect(newCurrent).center() + d->offset();
-                // We copy the same behaviour as for mousePressEvent().
-                QRect rect(d->pressedPosition - d->offset(), QSize(1, 1));
-                setSelection(rect, command);
+                if (newCurrent.isValid()) {
+                    // We copy the same behaviour as for mousePressEvent().
+                    QRect rect(d->pressedPosition - d->offset(), QSize(1, 1));
+                    setSelection(rect, command);
+                }
             }
             event->accept();
             return;
diff --git a/src/gui/kernel/qapplication_s60.cpp b/src/gui/kernel/qapplication_s60.cpp
index e64ebb1..670bf34 100644
--- a/src/gui/kernel/qapplication_s60.cpp
+++ b/src/gui/kernel/qapplication_s60.cpp
@@ -135,6 +135,38 @@ void QS60Data::setStatusPaneAndButtonGroupVisibility(bool statusPaneVisible, boo
 }
 #endif
 
+void QS60Data::controlVisibilityChanged(CCoeControl *control, bool visible)
+{
+    if (QWidgetPrivate::mapper && QWidgetPrivate::mapper->contains(control)) {
+        QWidget *const widget = QWidgetPrivate::mapper->value(control);
+        QWidget *const window = widget->window();
+        if (QTLWExtra *topData = qt_widget_private(window)->maybeTopData()) {
+            QWidgetBackingStoreTracker &backingStore = topData->backingStore;
+            if (visible) {
+                if (backingStore.data()) {
+                    backingStore.registerWidget(widget);
+                } else {
+#ifdef SYMBIAN_GRAPHICS_WSERV_QT_EFFECTS
+                    S60->wsSession().SendEffectCommand(ETfxCmdRestoreLayer);
+#endif
+                    backingStore.create(window);
+                    backingStore.registerWidget(widget);
+                    qt_widget_private(widget)->invalidateBuffer(widget->rect());
+                    widget->repaint();
+                }
+            } else {
+#ifdef  SYMBIAN_GRAPHICS_WSERV_QT_EFFECTS
+                S60->wsSession().SendEffectCommand(ETfxCmdDeallocateLayer);
+#endif
+                backingStore.unregisterWidget(widget);
+                // In order to ensure that any resources used by the window surface
+                // are immediately freed, we flush the WSERV command buffer.
+                S60->wsSession().Flush();
+            }
+        }
+    }
+}
+
 bool qt_nograb()                                // application no-grab option
 {
 #if defined(QT_DEBUG)
@@ -1475,6 +1507,8 @@ void qt_init(QApplicationPrivate * /* priv */, int)
             S60->avkonComponentsSupportTransparency = (value==1) ? true : false;
         }
     }
+    delete repository;
+    repository = 0;
 #endif
 
 #ifdef QT_KEYPAD_NAVIGATION
@@ -1920,35 +1954,10 @@ int QApplicationPrivate::symbianProcessWsEvent(const QSymbianEvent *symbianEvent
             if (callSymbianEventFilters(symbianEvent))
                 return 1;
             const TWsVisibilityChangedEvent *visChangedEvent = event->VisibilityChanged();
-            QWidget *w = QWidgetPrivate::mapper->value(control);
-            QWidget *const window = w->window();
-            if (!window->d_func()->maybeTopData())
-                break;
-            QRefCountedWidgetBackingStore &backingStore = window->d_func()->maybeTopData()->backingStore;
-            if (visChangedEvent->iFlags & TWsVisibilityChangedEvent::ENotVisible) {
-#ifdef  SYMBIAN_GRAPHICS_WSERV_QT_EFFECTS
-                S60->wsSession().SendEffectCommand(ETfxCmdDeallocateLayer);
-#endif
-                // Decrement backing store reference count
-                backingStore.deref();
-                // In order to ensure that any resources used by the window surface
-                // are immediately freed, we flush the WSERV command buffer.
-                S60->wsSession().Flush();
-            } else if (visChangedEvent->iFlags & TWsVisibilityChangedEvent::EPartiallyVisible) {
-                if (backingStore.data()) {
-                    // Increment backing store reference count
-                    backingStore.ref();
-                } else {
-#ifdef SYMBIAN_GRAPHICS_WSERV_QT_EFFECTS
-                    S60->wsSession().SendEffectCommand(ETfxCmdRestoreLayer);
-#endif
-                    // Create backing store with an initial reference count of 1
-                    backingStore.create(window);
-                    backingStore.ref();
-                    w->d_func()->invalidateBuffer(w->rect());
-                    w->repaint();
-                }
-            }
+            if (visChangedEvent->iFlags & TWsVisibilityChangedEvent::ENotVisible)
+                S60->controlVisibilityChanged(control, false);
+            else if (visChangedEvent->iFlags & TWsVisibilityChangedEvent::EPartiallyVisible)
+                S60->controlVisibilityChanged(control, true);
             return 1;
         }
         break;
diff --git a/src/gui/kernel/qgesturemanager.cpp b/src/gui/kernel/qgesturemanager.cpp
index fe9dd8a..e768a21 100644
--- a/src/gui/kernel/qgesturemanager.cpp
+++ b/src/gui/kernel/qgesturemanager.cpp
@@ -129,7 +129,12 @@ Qt::GestureType QGestureManager::registerGestureRecognizer(QGestureRecognizer *r
 void QGestureManager::unregisterGestureRecognizer(Qt::GestureType type)
 {
     QList<QGestureRecognizer *> list = m_recognizers.values(type);
-    m_recognizers.remove(type);
+    while (QGestureRecognizer *recognizer = m_recognizers.take(type)) {
+        if (!m_obsoleteGestures.contains(recognizer)) {
+            // inserting even an empty QSet will cause the recognizer to be deleted on destruction of the manager
+            m_obsoleteGestures.insert(recognizer, QSet<QGesture *>());
+        }
+    }
     foreach (QGesture *g, m_gestureToRecognizer.keys()) {
         QGestureRecognizer *recognizer = m_gestureToRecognizer.value(g);
         if (list.contains(recognizer)) {
diff --git a/src/gui/kernel/qt_s60_p.h b/src/gui/kernel/qt_s60_p.h
index a18ea07..ad6a99a 100644
--- a/src/gui/kernel/qt_s60_p.h
+++ b/src/gui/kernel/qt_s60_p.h
@@ -164,6 +164,7 @@ public:
     static inline CEikButtonGroupContainer* buttonGroupContainer();
     static void setStatusPaneAndButtonGroupVisibility(bool statusPaneVisible, bool buttonGroupVisible);
 #endif
+    static void controlVisibilityChanged(CCoeControl *control, bool visible);
 
 #ifdef Q_OS_SYMBIAN
     TTrapHandler *s60InstalledTrapHandler;
diff --git a/src/gui/kernel/qwidget.cpp b/src/gui/kernel/qwidget.cpp
index aaa29a1..dad4848 100644
--- a/src/gui/kernel/qwidget.cpp
+++ b/src/gui/kernel/qwidget.cpp
@@ -162,47 +162,76 @@ static inline bool hasBackingStoreSupport()
 extern bool qt_sendSpontaneousEvent(QObject*, QEvent*); // qapplication.cpp
 extern QDesktopWidget *qt_desktopWidget; // qapplication.cpp
 
+/*!
+    \internal
+    \class QWidgetBackingStoreTracker
+    \brief Class which allows tracking of which widgets are using a given backing store
 
-QRefCountedWidgetBackingStore::QRefCountedWidgetBackingStore()
+    QWidgetBackingStoreTracker is a thin wrapper around a QWidgetBackingStore pointer,
+    which maintains a list of the QWidgets which are currently using the backing
+    store.  This list is modified via the registerWidget and unregisterWidget functions.
+ */
+
+QWidgetBackingStoreTracker::QWidgetBackingStoreTracker()
     :   m_ptr(0)
-    ,   m_count(0)
 {
 
 }
 
-QRefCountedWidgetBackingStore::~QRefCountedWidgetBackingStore()
+QWidgetBackingStoreTracker::~QWidgetBackingStoreTracker()
 {
     delete m_ptr;
 }
 
-void QRefCountedWidgetBackingStore::create(QWidget *widget)
+/*!
+    \internal
+    Destroy the contained QWidgetBackingStore, if not null, and clear the list of
+    widgets using the backing store, then create a new QWidgetBackingStore, providing
+    the QWidget.
+ */
+void QWidgetBackingStoreTracker::create(QWidget *widget)
 {
     destroy();
     m_ptr = new QWidgetBackingStore(widget);
-    m_count = 0;
 }
 
-void QRefCountedWidgetBackingStore::destroy()
+/*!
+    \internal
+    Destroy the contained QWidgetBackingStore, if not null, and clear the list of
+    widgets using the backing store.
+ */
+void QWidgetBackingStoreTracker::destroy()
 {
     delete m_ptr;
     m_ptr = 0;
-    m_count = 0;
+    m_widgets.clear();
 }
 
-void QRefCountedWidgetBackingStore::ref()
+/*!
+    \internal
+    Add the widget to the list of widgets currently using the backing store.
+    If the widget was already in the list, this function is a no-op.
+ */
+void QWidgetBackingStoreTracker::registerWidget(QWidget *w)
 {
     Q_ASSERT(m_ptr);
-    ++m_count;
+    Q_ASSERT(w->internalWinId());
+    Q_ASSERT(qt_widget_private(w)->maybeBackingStore() == m_ptr);
+    m_widgets.insert(w);
 }
 
-void QRefCountedWidgetBackingStore::deref()
+/*!
+    \internal
+    Remove the widget from the list of widgets currently using the backing store.
+    If the widget was in the list, and removing it causes the list to be empty,
+    the backing store is deleted.
+    If the widget was not in the list, this function is a no-op.
+ */
+void QWidgetBackingStoreTracker::unregisterWidget(QWidget *w)
 {
-    if (m_count) {
-        Q_ASSERT(m_ptr);
-        if (0 == --m_count) {
-            delete m_ptr;
-            m_ptr = 0;
-        }
+    if (m_widgets.remove(w) && m_widgets.isEmpty()) {
+        delete m_ptr;
+        m_ptr = 0;
     }
 }
 
diff --git a/src/gui/kernel/qwidget_mac.mm b/src/gui/kernel/qwidget_mac.mm
index 8ae6a99..1979c84 100644
--- a/src/gui/kernel/qwidget_mac.mm
+++ b/src/gui/kernel/qwidget_mac.mm
@@ -2796,10 +2796,14 @@ void QWidgetPrivate::setSubWindowStacking(bool set)
 
     if (QWidget *parent = q->parentWidget()) {
         if (parent->testAttribute(Qt::WA_WState_Created)) {
-            if (set)
-                [qt_mac_window_for(parent) addChildWindow:qt_mac_window_for(q) ordered:NSWindowAbove];
-            else
+            if (set) {
+                if (parent->isVisible()) {
+                    NSWindow *childwin = qt_mac_window_for(q);
+                    [qt_mac_window_for(parent) addChildWindow:childwin ordered:NSWindowAbove];
+                }
+            } else {
                 [qt_mac_window_for(parent) removeChildWindow:qt_mac_window_for(q)];
+            }
         }
     }
 
@@ -2807,10 +2811,12 @@ void QWidgetPrivate::setSubWindowStacking(bool set)
     for (int i=0; i<widgets.size(); ++i) {
         QWidget *child = widgets.at(i);
         if (child->isWindow() && child->testAttribute(Qt::WA_WState_Created) && child->isVisibleTo(q)) {
-            if (set)
-                [qt_mac_window_for(q) addChildWindow:qt_mac_window_for(child) ordered:NSWindowAbove];
-            else
+            if (set) {
+                NSWindow *childwin = qt_mac_window_for(child);
+                [qt_mac_window_for(q) addChildWindow:childwin ordered:NSWindowAbove];
+            } else {
                 [qt_mac_window_for(q) removeChildWindow:qt_mac_window_for(child)];
+            }
         }
     }
 }
diff --git a/src/gui/kernel/qwidget_p.h b/src/gui/kernel/qwidget_p.h
index 587d7fb..4a79dc7 100644
--- a/src/gui/kernel/qwidget_p.h
+++ b/src/gui/kernel/qwidget_p.h
@@ -110,17 +110,18 @@ class QWidgetItemV2;
 
 class QStyle;
 
-class Q_AUTOTEST_EXPORT QRefCountedWidgetBackingStore
+class Q_AUTOTEST_EXPORT QWidgetBackingStoreTracker
 {
+
 public:
-    QRefCountedWidgetBackingStore();
-    ~QRefCountedWidgetBackingStore();
+    QWidgetBackingStoreTracker();
+    ~QWidgetBackingStoreTracker();
 
     void create(QWidget *tlw);
     void destroy();
 
-    void ref();
-    void deref();
+    void registerWidget(QWidget *w);
+    void unregisterWidget(QWidget *w);
 
     inline QWidgetBackingStore* data()
     {
@@ -143,11 +144,11 @@ public:
     }
 
 private:
-    Q_DISABLE_COPY(QRefCountedWidgetBackingStore)
+    Q_DISABLE_COPY(QWidgetBackingStoreTracker)
 
 private:
     QWidgetBackingStore* m_ptr;
-    int m_count;
+    QSet<QWidget *> m_widgets;
 };
 
 struct QTLWExtra {
@@ -156,7 +157,7 @@ struct QTLWExtra {
     // Regular pointers (keep them together to avoid gaps on 64 bits architectures).
     QIcon *icon; // widget icon
     QPixmap *iconPixmap;
-    QRefCountedWidgetBackingStore backingStore;
+    QWidgetBackingStoreTracker backingStore;
     QWindowSurface *windowSurface;
     QPainter *sharedPainter;
 
diff --git a/src/gui/kernel/qwidget_s60.cpp b/src/gui/kernel/qwidget_s60.cpp
index 56349ad..319f330 100644
--- a/src/gui/kernel/qwidget_s60.cpp
+++ b/src/gui/kernel/qwidget_s60.cpp
@@ -684,6 +684,12 @@ void QWidgetPrivate::setParent_sys(QWidget *parent, Qt::WindowFlags f)
     QSymbianControl *old_winid = static_cast<QSymbianControl *>(wasCreated ? data.winid : 0);
     if ((q->windowType() == Qt::Desktop))
         old_winid = 0;
+
+    // old_winid may not have received a 'not visible' visibility
+    // changed event before being destroyed; make sure that it is
+    // removed from the backing store's list of visible windows.
+    S60->controlVisibilityChanged(old_winid, false);
+
     setWinId(0);
 
     // hide and reparent our own window away. Otherwise we might get
diff --git a/src/gui/painting/painting.pri b/src/gui/painting/painting.pri
index dfa4a48..793d380 100644
--- a/src/gui/painting/painting.pri
+++ b/src/gui/painting/painting.pri
@@ -212,6 +212,7 @@ if(mmx|3dnow|sse|sse2|iwmmxt) {
     SSE3DNOW_SOURCES += painting/qdrawhelper_sse3dnow.cpp
     SSE_SOURCES += painting/qdrawhelper_sse.cpp
     SSE2_SOURCES += painting/qdrawhelper_sse2.cpp
+    SSSE3_SOURCES += painting/qdrawhelper_ssse3.cpp
     IWMMXT_SOURCES += painting/qdrawhelper_iwmmxt.cpp
 }
 
diff --git a/src/gui/painting/qbackingstore.cpp b/src/gui/painting/qbackingstore.cpp
index 83751ed..ac9b994 100644
--- a/src/gui/painting/qbackingstore.cpp
+++ b/src/gui/painting/qbackingstore.cpp
@@ -352,7 +352,7 @@ void QWidgetBackingStore::beginPaint(QRegion &toClean, QWidget *widget, QWindowS
     // Always flush repainted areas.
     dirtyOnScreen += toClean;
 
-#ifdef Q_WS_QWS
+#if defined(Q_WS_QWS) && !defined(Q_BACKINGSTORE_SUBSURFACES)
     toClean.translate(tlwOffset);
 #endif
 
@@ -1294,7 +1294,12 @@ void QWidgetBackingStore::sync()
 #ifdef Q_BACKINGSTORE_SUBSURFACES
         QWindowSurface *subSurface = w->windowSurface();
         BeginPaintInfo beginPaintInfo;
-        beginPaint(toBePainted, w, subSurface, &beginPaintInfo, false);
+
+        QPoint off = w->mapTo(tlw, QPoint());
+        toBePainted.translate(off);
+        beginPaint(toBePainted, w, subSurface, &beginPaintInfo, true);
+        toBePainted.translate(-off);
+
         if (beginPaintInfo.nothingToPaint)
             continue;
 
diff --git a/src/gui/painting/qdrawhelper.cpp b/src/gui/painting/qdrawhelper.cpp
index 1ff3d7b..276da93 100644
--- a/src/gui/painting/qdrawhelper.cpp
+++ b/src/gui/painting/qdrawhelper.cpp
@@ -7840,6 +7840,17 @@ void qInitDrawhelperAsm()
             qBlendFunctions[QImage::Format_ARGB32_Premultiplied][QImage::Format_RGB32] = qt_blend_rgb32_on_rgb32_sse2;
             qBlendFunctions[QImage::Format_RGB32][QImage::Format_ARGB32_Premultiplied] = qt_blend_argb32_on_argb32_sse2;
             qBlendFunctions[QImage::Format_ARGB32_Premultiplied][QImage::Format_ARGB32_Premultiplied] = qt_blend_argb32_on_argb32_sse2;
+
+#if defined(QT_HAVE_SSSE3)
+            if (features & SSSE3) {
+                extern void qt_blend_argb32_on_argb32_ssse3(uchar *destPixels, int dbpl,
+                                                            const uchar *srcPixels, int sbpl,
+                                                            int w, int h,
+                                                            int const_alpha);
+                qBlendFunctions[QImage::Format_RGB32][QImage::Format_ARGB32_Premultiplied] = qt_blend_argb32_on_argb32_ssse3;
+                qBlendFunctions[QImage::Format_ARGB32_Premultiplied][QImage::Format_ARGB32_Premultiplied] = qt_blend_argb32_on_argb32_ssse3;
+            }
+#endif // QT_HAVE_SSSE3
         } else
 #endif
         {
diff --git a/src/gui/painting/qdrawhelper_ssse3.cpp b/src/gui/painting/qdrawhelper_ssse3.cpp
new file mode 100644
index 0000000..9c02009
--- /dev/null
+++ b/src/gui/painting/qdrawhelper_ssse3.cpp
@@ -0,0 +1,253 @@
+/****************************************************************************
+**
+** 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.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+
+#ifdef QT_HAVE_SSSE3
+
+#include <private/qsimd_p.h>
+#include <private/qdrawhelper_x86_p.h>
+#include <private/qdrawingprimitive_sse2_p.h>
+
+QT_BEGIN_NAMESPACE
+
+inline static void blend_pixel(quint32 &dst, const quint32 src)
+{
+    if (src >= 0xff000000)
+        dst = src;
+    else if (src != 0)
+        dst = src + BYTE_MUL(dst, qAlpha(~src));
+}
+
+
+/* The instruction palignr uses direct arguments, so we have to generate the code fo the different
+   shift (4, 8, 12). Checking the alignment inside the loop is unfortunatelly way too slow.
+ */
+#define BLENDING_LOOP(palignrOffset, length)\
+    for (; x < length-3; x += 4) { \
+        const __m128i srcVectorLastLoaded = _mm_load_si128((__m128i *)&src[x - minusOffsetToAlignSrcOn16Bytes + 4]);\
+        const __m128i srcVector = _mm_alignr_epi8(srcVectorLastLoaded, srcVectorPrevLoaded, palignrOffset); \
+        const __m128i srcVectorAlpha = _mm_and_si128(srcVector, alphaMask); \
+        if (_mm_movemask_epi8(_mm_cmpeq_epi32(srcVectorAlpha, alphaMask)) == 0xffff) { \
+            _mm_store_si128((__m128i *)&dst[x], srcVector); \
+        } else if (_mm_movemask_epi8(_mm_cmpeq_epi32(srcVectorAlpha, nullVector)) != 0xffff) { \
+            __m128i alphaChannel = _mm_shuffle_epi8(srcVector, alphaShuffleMask); \
+            alphaChannel = _mm_sub_epi16(one, alphaChannel); \
+            const __m128i dstVector = _mm_load_si128((__m128i *)&dst[x]); \
+            __m128i destMultipliedByOneMinusAlpha; \
+            BYTE_MUL_SSE2(destMultipliedByOneMinusAlpha, dstVector, alphaChannel, colorMask, half); \
+            const __m128i result = _mm_add_epi8(srcVector, destMultipliedByOneMinusAlpha); \
+            _mm_store_si128((__m128i *)&dst[x], result); \
+        } \
+        srcVectorPrevLoaded = srcVectorLastLoaded;\
+    }
+
+
+#define BLEND_SOURCE_OVER_ARGB32_FIRST_ROW_SSSE3(dst, src, length, nullVector, half, one, colorMask, alphaMask) { \
+    int x = 0; \
+\
+    /* First, get dst aligned. */ \
+    const int offsetToAlignOn16Bytes = (4 - ((reinterpret_cast<quintptr>(dst) >> 2) & 0x3)) & 0x3;\
+    const int prologLength = qMin(length, offsetToAlignOn16Bytes);\
+\
+    for (; x < prologLength; ++x) {\
+        blend_pixel(dst[x], src[x]); \
+    } \
+\
+    const int minusOffsetToAlignSrcOn16Bytes = (reinterpret_cast<quintptr>(&(src[x])) >> 2) & 0x3;\
+\
+    if (!minusOffsetToAlignSrcOn16Bytes) {\
+        /* src is aligned, usual algorithm but with aligned operations.\
+           See the SSE2 version for more documentation on the algorithm itself. */\
+        const __m128i alphaShuffleMask = _mm_set_epi8(0xff,15,0xff,15,0xff,11,0xff,11,0xff,7,0xff,7,0xff,3,0xff,3);\
+        for (; x < length-3; x += 4) { \
+            const __m128i srcVector = _mm_load_si128((__m128i *)&src[x]); \
+            const __m128i srcVectorAlpha = _mm_and_si128(srcVector, alphaMask); \
+            if (_mm_movemask_epi8(_mm_cmpeq_epi32(srcVectorAlpha, alphaMask)) == 0xffff) { \
+                _mm_store_si128((__m128i *)&dst[x], srcVector); \
+            } else if (_mm_movemask_epi8(_mm_cmpeq_epi32(srcVectorAlpha, nullVector)) != 0xffff) { \
+                __m128i alphaChannel = _mm_shuffle_epi8(srcVector, alphaShuffleMask); \
+                alphaChannel = _mm_sub_epi16(one, alphaChannel); \
+                const __m128i dstVector = _mm_load_si128((__m128i *)&dst[x]); \
+                __m128i destMultipliedByOneMinusAlpha; \
+                BYTE_MUL_SSE2(destMultipliedByOneMinusAlpha, dstVector, alphaChannel, colorMask, half); \
+                const __m128i result = _mm_add_epi8(srcVector, destMultipliedByOneMinusAlpha); \
+                _mm_store_si128((__m128i *)&dst[x], result); \
+            } \
+        } /* end for() */\
+    } else if ((length - x) >= 8) {\
+        /* We are at the first line, so "x - minusOffsetToAlignSrcOn16Bytes" could go before src, and\
+           generate an invalid access. */\
+\
+        /* We use two vectors to extract the src: prevLoaded for the first pixels, lastLoaded for the current pixels. */\
+        __m128i srcVectorPrevLoaded;\
+        if (minusOffsetToAlignSrcOn16Bytes > prologLength) {\
+            /* We go forward 4 pixels to avoid reading before src. */\
+            for (; x < prologLength + 4; ++x)\
+                blend_pixel(dst[x], src[x]); \
+        }\
+        srcVectorPrevLoaded = _mm_load_si128((__m128i *)&src[x - minusOffsetToAlignSrcOn16Bytes]);\
+        const int palignrOffset = minusOffsetToAlignSrcOn16Bytes << 2;\
+\
+        const __m128i alphaShuffleMask = _mm_set_epi8(0xff,15,0xff,15,0xff,11,0xff,11,0xff,7,0xff,7,0xff,3,0xff,3);\
+        switch (palignrOffset) {\
+        case 4:\
+            BLENDING_LOOP(4, length)\
+            break;\
+        case 8:\
+            BLENDING_LOOP(8, length)\
+            break;\
+        case 12:\
+            BLENDING_LOOP(12, length)\
+            break;\
+        }\
+    }\
+    for (; x < length; ++x) \
+        blend_pixel(dst[x], src[x]); \
+}
+
+// Basically blend src over dst with the const alpha defined as constAlphaVector.
+// nullVector, half, one, colorMask are constant accross the whole image/texture, and should be defined as:
+//const __m128i nullVector = _mm_set1_epi32(0);
+//const __m128i half = _mm_set1_epi16(0x80);
+//const __m128i one = _mm_set1_epi16(0xff);
+//const __m128i colorMask = _mm_set1_epi32(0x00ff00ff);
+//const __m128i alphaMask = _mm_set1_epi32(0xff000000);
+//
+// The computation being done is:
+// result = s + d * (1-alpha)
+// with shortcuts if fully opaque or fully transparent.
+#define BLEND_SOURCE_OVER_ARGB32_MAIN_SSSE3(dst, src, length, nullVector, half, one, colorMask, alphaMask) { \
+    int x = 0; \
+\
+    /* First, get dst aligned. */ \
+    ALIGNMENT_PROLOGUE_16BYTES(dst, x, length) { \
+        blend_pixel(dst[x], src[x]); \
+    } \
+\
+    const int minusOffsetToAlignSrcOn16Bytes = (reinterpret_cast<quintptr>(&(src[x])) >> 2) & 0x3;\
+\
+    if (!minusOffsetToAlignSrcOn16Bytes) {\
+        /* src is aligned, usual algorithm but with aligned operations.\
+           See the SSE2 version for more documentation on the algorithm itself. */\
+        const __m128i alphaShuffleMask = _mm_set_epi8(0xff,15,0xff,15,0xff,11,0xff,11,0xff,7,0xff,7,0xff,3,0xff,3);\
+        for (; x < length-3; x += 4) { \
+            const __m128i srcVector = _mm_load_si128((__m128i *)&src[x]); \
+            const __m128i srcVectorAlpha = _mm_and_si128(srcVector, alphaMask); \
+            if (_mm_movemask_epi8(_mm_cmpeq_epi32(srcVectorAlpha, alphaMask)) == 0xffff) { \
+                _mm_store_si128((__m128i *)&dst[x], srcVector); \
+            } else if (_mm_movemask_epi8(_mm_cmpeq_epi32(srcVectorAlpha, nullVector)) != 0xffff) { \
+                __m128i alphaChannel = _mm_shuffle_epi8(srcVector, alphaShuffleMask); \
+                alphaChannel = _mm_sub_epi16(one, alphaChannel); \
+                const __m128i dstVector = _mm_load_si128((__m128i *)&dst[x]); \
+                __m128i destMultipliedByOneMinusAlpha; \
+                BYTE_MUL_SSE2(destMultipliedByOneMinusAlpha, dstVector, alphaChannel, colorMask, half); \
+                const __m128i result = _mm_add_epi8(srcVector, destMultipliedByOneMinusAlpha); \
+                _mm_store_si128((__m128i *)&dst[x], result); \
+            } \
+        } /* end for() */\
+    } else if ((length - x) >= 8) {\
+        /* We use two vectors to extract the src: prevLoaded for the first pixels, lastLoaded for the current pixels. */\
+        __m128i srcVectorPrevLoaded = _mm_load_si128((__m128i *)&src[x - minusOffsetToAlignSrcOn16Bytes]);\
+        const int palignrOffset = minusOffsetToAlignSrcOn16Bytes << 2;\
+\
+        const __m128i alphaShuffleMask = _mm_set_epi8(0xff,15,0xff,15,0xff,11,0xff,11,0xff,7,0xff,7,0xff,3,0xff,3);\
+        switch (palignrOffset) {\
+        case 4:\
+            BLENDING_LOOP(4, length)\
+            break;\
+        case 8:\
+            BLENDING_LOOP(8, length)\
+            break;\
+        case 12:\
+            BLENDING_LOOP(12, length)\
+            break;\
+        }\
+    }\
+    for (; x < length; ++x) \
+        blend_pixel(dst[x], src[x]); \
+}
+
+void qt_blend_argb32_on_argb32_ssse3(uchar *destPixels, int dbpl,
+                                     const uchar *srcPixels, int sbpl,
+                                     int w, int h,
+                                     int const_alpha)
+{
+    const quint32 *src = (const quint32 *) srcPixels;
+    quint32 *dst = (quint32 *) destPixels;
+    if (const_alpha == 256) {
+        const __m128i alphaMask = _mm_set1_epi32(0xff000000);
+        const __m128i nullVector = _mm_setzero_si128();
+        const __m128i half = _mm_set1_epi16(0x80);
+        const __m128i one = _mm_set1_epi16(0xff);
+        const __m128i colorMask = _mm_set1_epi32(0x00ff00ff);
+
+        // We have to unrol the first row in order to deal with the load on unaligned data
+        // prior to the src pointer.
+        BLEND_SOURCE_OVER_ARGB32_FIRST_ROW_SSSE3(dst, src, w, nullVector, half, one, colorMask, alphaMask);
+        dst = (quint32 *)(((uchar *) dst) + dbpl);
+        src = (const quint32 *)(((const uchar *) src) + sbpl);
+
+        for (int y = 1; y < h; ++y) {
+            BLEND_SOURCE_OVER_ARGB32_MAIN_SSSE3(dst, src, w, nullVector, half, one, colorMask, alphaMask);
+            dst = (quint32 *)(((uchar *) dst) + dbpl);
+            src = (const quint32 *)(((const uchar *) src) + sbpl);
+        }
+    } else if (const_alpha != 0) {
+        // dest = (s + d * sia) * ca + d * cia
+        //      = s * ca + d * (sia * ca + cia)
+        //      = s * ca + d * (1 - sa*ca)
+        const_alpha = (const_alpha * 255) >> 8;
+        const __m128i nullVector = _mm_setzero_si128();
+        const __m128i half = _mm_set1_epi16(0x80);
+        const __m128i one = _mm_set1_epi16(0xff);
+        const __m128i colorMask = _mm_set1_epi32(0x00ff00ff);
+        const __m128i constAlphaVector = _mm_set1_epi16(const_alpha);
+        for (int y = 0; y < h; ++y) {
+            BLEND_SOURCE_OVER_ARGB32_WITH_CONST_ALPHA_SSE2(dst, src, w, nullVector, half, one, colorMask, constAlphaVector)
+            dst = (quint32 *)(((uchar *) dst) + dbpl);
+            src = (const quint32 *)(((const uchar *) src) + sbpl);
+        }
+    }
+}
+
+QT_END_NAMESPACE
+
+#endif // QT_HAVE_SSSE3
diff --git a/src/gui/painting/qgrayraster.c b/src/gui/painting/qgrayraster.c
index 5e7c67a..94039fb 100644
--- a/src/gui/painting/qgrayraster.c
+++ b/src/gui/painting/qgrayraster.c
@@ -956,53 +956,49 @@
                               const QT_FT_Vector*  control2,
                               const QT_FT_Vector*  to )
   {
-    TPos        dx, dy, da, db;
     int         top, level;
     int*        levels;
     QT_FT_Vector*  arc;
+    int         mid_x = ( DOWNSCALE( ras.x ) + to->x +
+                          3 * (control1->x + control2->x ) ) / 8;
+    int         mid_y = ( DOWNSCALE( ras.y ) + to->y +
+                          3 * (control1->y + control2->y ) ) / 8;
+    TPos        dx = DOWNSCALE( ras.x ) + to->x - ( mid_x << 1 );
+    TPos        dy = DOWNSCALE( ras.y ) + to->y - ( mid_y << 1 );
 
 
-    dx = DOWNSCALE( ras.x ) + to->x - ( control1->x << 1 );
     if ( dx < 0 )
       dx = -dx;
-    dy = DOWNSCALE( ras.y ) + to->y - ( control1->y << 1 );
     if ( dy < 0 )
       dy = -dy;
     if ( dx < dy )
       dx = dy;
-    da = dx;
-
-    dx = DOWNSCALE( ras.x ) + to->x - 3 * ( control1->x + control2->x );
-    if ( dx < 0 )
-      dx = -dx;
-    dy = DOWNSCALE( ras.y ) + to->y - 3 * ( control1->x + control2->y );
-    if ( dy < 0 )
-      dy = -dy;
-    if ( dx < dy )
-      dx = dy;
-    db = dx;
 
     level = 1;
-    da    = da / ras.cubic_level;
-    db    = db / ras.conic_level;
-    while ( da > 0 || db > 0 )
+    dx /= ras.cubic_level;
+    while ( dx > 0 )
     {
-      da >>= 2;
-      db >>= 3;
+      dx >>= 2;
       level++;
     }
 
     if ( level <= 1 )
     {
-      TPos   to_x, to_y, mid_x, mid_y;
+      TPos   to_x, to_y;
 
 
       to_x  = UPSCALE( to->x );
       to_y  = UPSCALE( to->y );
+
+      /* Recalculation of midpoint is needed only if */
+      /* UPSCALE and DOWNSCALE have any effect.      */
+
+#if ( PIXEL_BITS != 6 )
       mid_x = ( ras.x + to_x +
                 3 * UPSCALE( control1->x + control2->x ) ) / 8;
       mid_y = ( ras.y + to_y +
                 3 * UPSCALE( control1->y + control2->y ) ) / 8;
+#endif
 
       gray_render_line( RAS_VAR_ mid_x, mid_y );
       gray_render_line( RAS_VAR_ to_x, to_y );
@@ -1359,10 +1355,6 @@
   /* <Input>                                                               */
   /*    outline        :: A pointer to the source target.                  */
   /*                                                                       */
-  /*    func_interface :: A table of `emitters', i.e,. function pointers   */
-  /*                      called during decomposition to indicate path     */
-  /*                      operations.                                      */
-  /*                                                                       */
   /*    user           :: A typeless pointer which is passed to each       */
   /*                      emitter during the decomposition.  It can be     */
   /*                      used to store the state during the               */
@@ -1373,15 +1365,10 @@
   /*                                                                       */
   static
   int  QT_FT_Outline_Decompose( const QT_FT_Outline*        outline,
-                             const QT_FT_Outline_Funcs*  func_interface,
                              void*                    user )
   {
 #undef SCALED
-#if 0
-#define SCALED( x )  ( ( (x) << shift ) - delta )
-#else
 #define SCALED( x )  (x)
-#endif
 
     QT_FT_Vector   v_last;
     QT_FT_Vector   v_control;
@@ -1396,12 +1383,6 @@
     int   error;
     char  tag;       /* current point's state           */
 
-#if 0
-    int   shift = func_interface->shift;
-    TPos  delta = func_interface->delta;
-#endif
-
-
     first = 0;
 
     for ( n = 0; n < outline->n_contours; n++ )
@@ -1455,7 +1436,7 @@
         tags--;
       }
 
-      error = func_interface->move_to( &v_start, user );
+      error = gray_move_to( &v_start, user );
       if ( error )
         goto Exit;
 
@@ -1475,7 +1456,7 @@
             vec.x = SCALED( point->x );
             vec.y = SCALED( point->y );
 
-            error = func_interface->line_to( &vec, user );
+            error = gray_line_to( &vec, user );
             if ( error )
               goto Exit;
             continue;
@@ -1502,7 +1483,7 @@
 
               if ( tag == QT_FT_CURVE_TAG_ON )
               {
-                error = func_interface->conic_to( &v_control, &vec,
+                error = gray_conic_to( &v_control, &vec,
                                                   user );
                 if ( error )
                   goto Exit;
@@ -1515,7 +1496,7 @@
               v_middle.x = ( v_control.x + vec.x ) / 2;
               v_middle.y = ( v_control.y + vec.y ) / 2;
 
-              error = func_interface->conic_to( &v_control, &v_middle,
+              error = gray_conic_to( &v_control, &v_middle,
                                                 user );
               if ( error )
                 goto Exit;
@@ -1524,7 +1505,7 @@
               goto Do_Conic;
             }
 
-            error = func_interface->conic_to( &v_control, &v_start,
+            error = gray_conic_to( &v_control, &v_start,
                                               user );
             goto Close;
           }
@@ -1555,20 +1536,20 @@
               vec.x = SCALED( point->x );
               vec.y = SCALED( point->y );
 
-              error = func_interface->cubic_to( &vec1, &vec2, &vec, user );
+              error = gray_cubic_to( &vec1, &vec2, &vec, user );
               if ( error )
                 goto Exit;
               continue;
             }
 
-            error = func_interface->cubic_to( &vec1, &vec2, &v_start, user );
+            error = gray_cubic_to( &vec1, &vec2, &v_start, user );
             goto Close;
           }
         }
       }
 
       /* close the contour with a line segment */
-      error = func_interface->line_to( &v_start, user );
+      error = gray_line_to( &v_start, user );
 
    Close:
       if ( error )
@@ -1596,22 +1577,11 @@
   static int
   gray_convert_glyph_inner( RAS_ARG )
   {
-    static
-    const QT_FT_Outline_Funcs  func_interface =
-    {
-      (QT_FT_Outline_MoveTo_Func) gray_move_to,
-      (QT_FT_Outline_LineTo_Func) gray_line_to,
-      (QT_FT_Outline_ConicTo_Func)gray_conic_to,
-      (QT_FT_Outline_CubicTo_Func)gray_cubic_to,
-      0,
-      0
-    };
-
     volatile int  error = 0;
 
     if ( qt_ft_setjmp( ras.jump_buffer ) == 0 )
     {
-      error = QT_FT_Outline_Decompose( &ras.outline, &func_interface, &ras );
+      error = QT_FT_Outline_Decompose( &ras.outline, &ras );
       gray_record_cell( RAS_VAR );
     }
     else
diff --git a/src/gui/painting/qpaintengine_x11.cpp b/src/gui/painting/qpaintengine_x11.cpp
index e521e01..5307142 100644
--- a/src/gui/painting/qpaintengine_x11.cpp
+++ b/src/gui/painting/qpaintengine_x11.cpp
@@ -1516,8 +1516,8 @@ void QX11PaintEnginePrivate::fillPolygon_translated(const QPointF *polygonPoints
     for (int i = 0; i < pointCount; ++i) {
         translated_points[i] = polygonPoints[i] + offset;
 
-        translated_points[i].rx() = qRound(translated_points[i].x()) + offs;
-        translated_points[i].ry() = qRound(translated_points[i].y()) + offs;
+        translated_points[i].rx() = qFloor(translated_points[i].x()) + offs;
+        translated_points[i].ry() = qFloor(translated_points[i].y()) + offs;
     }
 
     fillPolygon_dev(translated_points.data(), pointCount, gcMode, mode);
@@ -1754,8 +1754,8 @@ void QX11PaintEnginePrivate::fillPath(const QPainterPath &path, QX11PaintEngineP
         for (int j = 0; j < polys.at(i).size(); ++j) {
             translated_points[j] = polys.at(i).at(j);
             if (!X11->use_xrender || !(render_hints & QPainter::Antialiasing)) {
-                translated_points[j].rx() = qRound(translated_points[j].rx() + aliasedCoordinateDelta) + offs;
-                translated_points[j].ry() = qRound(translated_points[j].ry() + aliasedCoordinateDelta) + offs;
+                translated_points[j].rx() = qFloor(translated_points[j].rx() + aliasedCoordinateDelta) + offs;
+                translated_points[j].ry() = qFloor(translated_points[j].ry() + aliasedCoordinateDelta) + offs;
             }
         }
 
diff --git a/src/gui/painting/qwindowsurface_qws.cpp b/src/gui/painting/qwindowsurface_qws.cpp
index a816ed2..170668b 100644
--- a/src/gui/painting/qwindowsurface_qws.cpp
+++ b/src/gui/painting/qwindowsurface_qws.cpp
@@ -882,7 +882,11 @@ void QWSMemorySurface::beginPaint(const QRegion &rgn)
         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);
+            QRect r = *it;
+#ifdef Q_BACKINGSTORE_SUBSURFACES
+            r.translate(painterOffset());
+#endif
+            p.fillRect(r, blank);
         }
     }
     QWSWindowSurface::beginPaint(rgn);
diff --git a/src/gui/text/qtextobject.cpp b/src/gui/text/qtextobject.cpp
index 5fb3384..d25fb05 100644
--- a/src/gui/text/qtextobject.cpp
+++ b/src/gui/text/qtextobject.cpp
@@ -1156,6 +1156,10 @@ Qt::LayoutDirection QTextBlock::textDirection() const
     if (dir != Qt::LayoutDirectionAuto)
         return dir;
 
+    dir = p->defaultTextOption.textDirection();
+    if (dir != Qt::LayoutDirectionAuto)
+        return dir;
+
     const QString buffer = p->buffer();
 
     const int pos = position();
diff --git a/src/gui/util/qcompleter.cpp b/src/gui/util/qcompleter.cpp
index 04d6de9..e718212 100644
--- a/src/gui/util/qcompleter.cpp
+++ b/src/gui/util/qcompleter.cpp
@@ -921,10 +921,12 @@ void QCompleterPrivate::showPopup(const QRect& rect)
 void QCompleterPrivate::_q_fileSystemModelDirectoryLoaded(const QString &path)
 {
     Q_Q(QCompleter);
+#ifndef QT_NO_LINEEDIT
     QLineEdit *lineEdit = qobject_cast<QLineEdit *>(widget);
     //the path given by QFileSystemModel does not end with /
     if (lineEdit && !lineEdit->text().isEmpty() && !q->completionPrefix().isEmpty() && q->completionPrefix() != path + QLatin1Char('/'))
         q->complete();
+#endif
 }
 
 /*!