Merge branch '4.7-upstream' into 4.7-doc

22 files changed, 270 insertions, 150 deletions

diff --git a/src/gui/accessible/qaccessible_win.cpp b/src/gui/accessible/qaccessible_win.cpp
index fc8575f..132d01f 100644
--- a/src/gui/accessible/qaccessible_win.cpp
+++ b/src/gui/accessible/qaccessible_win.cpp
@@ -42,7 +42,7 @@
 #ifndef QT_NO_ACCESSIBILITY
 
 #include "qapplication.h"
-#include "qlibrary.h"
+#include <private/qsystemlibrary_p.h>
 #include "qmessagebox.h" // ### dependency
 #include "qt_windows.h"
 #include "qwidget.h"
@@ -243,7 +243,7 @@ void QAccessible::updateAccessibility(QObject *o, int who, Event reason)
     static bool resolvedNWE = false;
     if (!resolvedNWE) {
         resolvedNWE = true;
-        ptrNotifyWinEvent = (PtrNotifyWinEvent)QLibrary::resolve(QLatin1String("user32"), "NotifyWinEvent");
+        ptrNotifyWinEvent = (PtrNotifyWinEvent)QSystemLibrary::resolve(QLatin1String("user32"), "NotifyWinEvent");
     }
     if (!ptrNotifyWinEvent)
         return;
diff --git a/src/gui/dialogs/qfiledialog_win.cpp b/src/gui/dialogs/qfiledialog_win.cpp
index 258707c..5b192b4 100644
--- a/src/gui/dialogs/qfiledialog_win.cpp
+++ b/src/gui/dialogs/qfiledialog_win.cpp
@@ -52,7 +52,7 @@
 #include <qbuffer.h>
 #include <qdir.h>
 #include <qstringlist.h>
-#include <qlibrary.h>
+#include <private/qsystemlibrary_p.h>
 #include "qfiledialog_win_p.h"
 
 #ifndef QT_NO_THREAD
@@ -100,10 +100,10 @@ static void qt_win_resolve_libs()
 
         triedResolve = true;
 #if !defined(Q_WS_WINCE)
-        QLibrary lib(QLatin1String("shell32"));
-        ptrSHBrowseForFolder = (PtrSHBrowseForFolder) lib.resolve("SHBrowseForFolderW");
-        ptrSHGetPathFromIDList = (PtrSHGetPathFromIDList) lib.resolve("SHGetPathFromIDListW");
-        ptrSHGetMalloc = (PtrSHGetMalloc) lib.resolve("SHGetMalloc");
+        QSystemLibrary lib(L"shell32");
+        ptrSHBrowseForFolder = (PtrSHBrowseForFolder)lib.resolve("SHBrowseForFolderW");
+        ptrSHGetPathFromIDList = (PtrSHGetPathFromIDList)lib.resolve("SHGetPathFromIDListW");
+        ptrSHGetMalloc = (PtrSHGetMalloc)lib.resolve("SHGetMalloc");
 #else
         // CE stores them in a different lib and does not use unicode version
         HINSTANCE handle = LoadLibrary(L"Ceshell");
@@ -409,7 +409,7 @@ static bool qt_win_set_IFileDialogOptions(IFileDialog *pfd,
 {
     if (!pSHCreateItemFromParsingName) {
         // This function is available only in Vista & above.
-        QLibrary shellLib(QLatin1String("Shell32"));
+        QSystemLibrary shellLib(QLatin1String("Shell32"));
         pSHCreateItemFromParsingName = (PtrSHCreateItemFromParsingName)
             shellLib.resolve("SHCreateItemFromParsingName");
         if (!pSHCreateItemFromParsingName)
diff --git a/src/gui/dialogs/qwizard_win.cpp b/src/gui/dialogs/qwizard_win.cpp
index ad8801a..5fca8f2 100644
--- a/src/gui/dialogs/qwizard_win.cpp
+++ b/src/gui/dialogs/qwizard_win.cpp
@@ -43,7 +43,7 @@
 #ifndef QT_NO_STYLE_WINDOWSVISTA
 
 #include "qwizard_win_p.h"
-#include "qlibrary.h"
+#include <private/qsystemlibrary_p.h>
 #include "qwizard.h"
 #include "qpaintengine.h"
 #include "qapplication.h"
@@ -706,7 +706,7 @@ bool QVistaHelper::resolveSymbols()
     static bool tried = false;
     if (!tried) {
         tried = true;
-        QLibrary dwmLib(QString::fromAscii("dwmapi"));
+        QSystemLibrary dwmLib(L"dwmapi");
         pDwmIsCompositionEnabled =
             (PtrDwmIsCompositionEnabled)dwmLib.resolve("DwmIsCompositionEnabled");
         if (pDwmIsCompositionEnabled) {
@@ -714,7 +714,7 @@ bool QVistaHelper::resolveSymbols()
             pDwmExtendFrameIntoClientArea =
                 (PtrDwmExtendFrameIntoClientArea)dwmLib.resolve("DwmExtendFrameIntoClientArea");
         }
-        QLibrary themeLib(QString::fromAscii("uxtheme"));
+        QSystemLibrary themeLib(L"uxtheme");
         pIsAppThemed = (PtrIsAppThemed)themeLib.resolve("IsAppThemed");
         if (pIsAppThemed) {
             pDrawThemeBackground = (PtrDrawThemeBackground)themeLib.resolve("DrawThemeBackground");
diff --git a/src/gui/image/qpixmap_s60_p.h b/src/gui/image/qpixmap_s60_p.h
index 12885ec..42cc830 100644
--- a/src/gui/image/qpixmap_s60_p.h
+++ b/src/gui/image/qpixmap_s60_p.h
@@ -63,11 +63,6 @@ class CFbsBitGc;
 
 class QSymbianBitmapDataAccess;
 
-class QS60PixmapData;
-void qt_symbian_register_pixmap(QS60PixmapData *pd);
-void qt_symbian_unregister_pixmap(QS60PixmapData *pd);
-void qt_symbian_release_pixmaps();
-
 class QSymbianFbsHeapLock
 {
 public:
diff --git a/src/gui/kernel/qapplication_win.cpp b/src/gui/kernel/qapplication_win.cpp
index 0c48bfd..78028eb 100644
--- a/src/gui/kernel/qapplication_win.cpp
+++ b/src/gui/kernel/qapplication_win.cpp
@@ -68,7 +68,6 @@ extern void qt_wince_hide_taskbar(HWND hwnd); //defined in qguifunctions_wince.c
 #include "qdatetime.h"
 #include "qpointer.h"
 #include "qhash.h"
-#include "qlibrary.h"
 #include "qmetaobject.h"
 #include "qmime.h"
 #include "qpainter.h"
@@ -94,6 +93,7 @@ extern void qt_wince_hide_taskbar(HWND hwnd); //defined in qguifunctions_wince.c
 #include "qdebug.h"
 #include <private/qkeymapper_p.h>
 #include <private/qlocale_p.h>
+#include <private/qsystemlibrary_p.h>
 #include "qevent_p.h"
 
 //#define ALIEN_DEBUG
@@ -206,7 +206,7 @@ static void resolveAygLibs()
 {
     if (!aygResolved) {
         aygResolved = true;
-        QLibrary ayglib(QLatin1String("aygshell"));
+        QSystemLibrary ayglib(QLatin1String("aygshell"));
         if (!ayglib.load())
             return;
         ptrRecognizeGesture = (AygRecognizeGesture) ayglib.resolve("SHRecognizeGesture");
@@ -833,10 +833,10 @@ void qt_init(QApplicationPrivate *priv, int)
 
 #ifndef Q_OS_WINCE
     ptrUpdateLayeredWindowIndirect =
-        (PtrUpdateLayeredWindowIndirect) QLibrary::resolve(QLatin1String("user32"),
+        (PtrUpdateLayeredWindowIndirect) QSystemLibrary::resolve(QLatin1String("user32"),
                                                            "UpdateLayeredWindowIndirect");
     ptrUpdateLayeredWindow =
-        (PtrUpdateLayeredWindow) QLibrary::resolve(QLatin1String("user32"),
+        (PtrUpdateLayeredWindow) QSystemLibrary::resolve(QLatin1String("user32"),
                                                    "UpdateLayeredWindow");
 
     if (ptrUpdateLayeredWindow && !ptrUpdateLayeredWindowIndirect)
@@ -844,7 +844,7 @@ void qt_init(QApplicationPrivate *priv, int)
 
     // Notify Vista and Windows 7 that we support highter DPI settings
     ptrSetProcessDPIAware = (PtrSetProcessDPIAware)
-        QLibrary::resolve(QLatin1String("user32"), "SetProcessDPIAware");
+        QSystemLibrary::resolve(QLatin1String("user32"), "SetProcessDPIAware");
     if (ptrSetProcessDPIAware)
         ptrSetProcessDPIAware();
 #endif
@@ -865,30 +865,28 @@ void qt_init(QApplicationPrivate *priv, int)
 #elif !defined(Q_WS_WINCE)
   #if !defined(QT_NO_NATIVE_GESTURES)
     priv->GetGestureInfo =
-            (PtrGetGestureInfo)QLibrary::resolve(QLatin1String("user32"),
+            (PtrGetGestureInfo)QSystemLibrary::resolve(QLatin1String("user32"),
                                                  "GetGestureInfo");
     priv->GetGestureExtraArgs =
-            (PtrGetGestureExtraArgs)QLibrary::resolve(QLatin1String("user32"),
+            (PtrGetGestureExtraArgs)QSystemLibrary::resolve(QLatin1String("user32"),
                                                       "GetGestureExtraArgs");
     priv->CloseGestureInfoHandle =
-            (PtrCloseGestureInfoHandle)QLibrary::resolve(QLatin1String("user32"),
+            (PtrCloseGestureInfoHandle)QSystemLibrary::resolve(QLatin1String("user32"),
                                                          "CloseGestureInfoHandle");
     priv->SetGestureConfig =
-            (PtrSetGestureConfig)QLibrary::resolve(QLatin1String("user32"),
+            (PtrSetGestureConfig)QSystemLibrary::resolve(QLatin1String("user32"),
                                                    "SetGestureConfig");
     priv->GetGestureConfig =
-            (PtrGetGestureConfig)QLibrary::resolve(QLatin1String("user32"),
+            (PtrGetGestureConfig)QSystemLibrary::resolve(QLatin1String("user32"),
                                                    "GetGestureConfig");
   #endif // QT_NO_NATIVE_GESTURES
+    QSystemLibrary libTheme(QLatin1String("uxtheme"));
     priv->BeginPanningFeedback =
-            (PtrBeginPanningFeedback)QLibrary::resolve(QLatin1String("uxtheme"),
-                                                       "BeginPanningFeedback");
+            (PtrBeginPanningFeedback)libTheme.resolve("BeginPanningFeedback");
     priv->UpdatePanningFeedback =
-            (PtrUpdatePanningFeedback)QLibrary::resolve(QLatin1String("uxtheme"),
-                                                        "UpdatePanningFeedback");
+            (PtrUpdatePanningFeedback)libTheme.resolve("UpdatePanningFeedback");
     priv->EndPanningFeedback =
-        (PtrEndPanningFeedback)QLibrary::resolve(QLatin1String("uxtheme"),
-                                                   "EndPanningFeedback");
+        (PtrEndPanningFeedback)libTheme.resolve("EndPanningFeedback");
 #endif
 #endif // QT_NO_GESTURES
 }
@@ -2338,7 +2336,7 @@ extern "C" LRESULT QT_WIN_CALLBACK QtWndProc(HWND hwnd, UINT message, WPARAM wPa
                 if (!oleaccChecked) {
                     oleaccChecked = true;
 #if !defined(Q_OS_WINCE)
-                    ptrLresultFromObject = (PtrLresultFromObject)QLibrary::resolve(QLatin1String("oleacc.dll"), "LresultFromObject");
+                    ptrLresultFromObject = (PtrLresultFromObject)QSystemLibrary::resolve(QLatin1String("oleacc"), "LresultFromObject");
 #endif
                 }
                 if (ptrLresultFromObject) {
@@ -3142,7 +3140,7 @@ bool QETWidget::translateMouseEvent(const MSG &msg)
             if (curWin != 0) {
                 if (!trackMouseEventLookup) {
                     trackMouseEventLookup = true;
-                    ptrTrackMouseEvent = (PtrTrackMouseEvent)QLibrary::resolve(QLatin1String("comctl32"), "_TrackMouseEvent");
+                    ptrTrackMouseEvent = (PtrTrackMouseEvent)QSystemLibrary::resolve(QLatin1String("comctl32"), "_TrackMouseEvent");
                 }
                 if (ptrTrackMouseEvent && !qApp->d_func()->inPopupMode()) {
                     // We always have to set the tracking, since
@@ -3677,7 +3675,7 @@ static void initWinTabFunctions()
     if (!qt_is_gui_used)
         return;
 
-    QLibrary library(QLatin1String("wintab32"));
+    QSystemLibrary library(QLatin1String("wintab32"));
     if (library.load()) {
         ptrWTInfo = (PtrWTInfo)library.resolve("WTInfoW");
         ptrWTGet = (PtrWTGet)library.resolve("WTGetW");
@@ -4100,7 +4098,7 @@ void QApplicationPrivate::initializeMultitouch_sys()
                 value & (QT_NID_INTEGRATED_TOUCH | QT_NID_EXTERNAL_TOUCH | QT_NID_MULTI_INPUT);
     }
 
-    QLibrary library(QLatin1String("user32"));
+    QSystemLibrary library(QLatin1String("user32"));
     // MinGW (g++ 3.4.5) accepts only C casts.
     RegisterTouchWindow = (PtrRegisterTouchWindow)(library.resolve("RegisterTouchWindow"));
     GetTouchInputInfo = (PtrGetTouchInputInfo)(library.resolve("GetTouchInputInfo"));
diff --git a/src/gui/kernel/qdesktopwidget_win.cpp b/src/gui/kernel/qdesktopwidget_win.cpp
index 07dbc24..1b2dfe7 100644
--- a/src/gui/kernel/qdesktopwidget_win.cpp
+++ b/src/gui/kernel/qdesktopwidget_win.cpp
@@ -42,7 +42,7 @@
 #include "qdesktopwidget.h"
 #include "qt_windows.h"
 #include "qapplication_p.h"
-#include "qlibrary.h"
+#include <private/qsystemlibrary_p.h>
 #include <qvector.h>
 #include <limits.h>
 #ifdef Q_WS_WINCE
@@ -155,7 +155,7 @@ void QDesktopWidgetPrivate::init(QDesktopWidget *that)
     screenCount = 0;
 
 #ifndef Q_OS_WINCE
-    QLibrary user32Lib(QLatin1String("user32"));
+    QSystemLibrary user32Lib(QLatin1String("user32"));
     if (user32Lib.load()) {
         enumDisplayMonitors = (EnumFunc)user32Lib.resolve("EnumDisplayMonitors");
         getMonitorInfo = (InfoFunc)user32Lib.resolve("GetMonitorInfoW");
@@ -173,7 +173,7 @@ void QDesktopWidgetPrivate::init(QDesktopWidget *that)
     enumDisplayMonitors = 0;
     getMonitorInfo = 0;
 #else
-    QLibrary coreLib(QLatin1String("coredll"));
+    QSystemLibrary coreLib(QLatin1String("coredll"));
     if (coreLib.load()) {
         // CE >= 4.0 case
         enumDisplayMonitors = (EnumFunc)coreLib.resolve("EnumDisplayMonitors");
diff --git a/src/gui/kernel/qsoftkeymanager_s60.cpp b/src/gui/kernel/qsoftkeymanager_s60.cpp
index 6325d95..fee1580 100644
--- a/src/gui/kernel/qsoftkeymanager_s60.cpp
+++ b/src/gui/kernel/qsoftkeymanager_s60.cpp
@@ -401,7 +401,7 @@ bool QSoftKeyManagerPrivateS60::handleCommand(int command)
                 foreach(QAction *menuAction, action->menu()->actions()) {
                     QMenu *menu = menuAction->menu();
                     if(menu)
-                        menuBar->addMenu(action->menu());
+                        menuBar->addMenu(menu);
                     else
                         menuBar->addAction(menuAction);
                 }
diff --git a/src/gui/kernel/qwidget_win.cpp b/src/gui/kernel/qwidget_win.cpp
index 59035b1..3d206fd 100644
--- a/src/gui/kernel/qwidget_win.cpp
+++ b/src/gui/kernel/qwidget_win.cpp
@@ -47,7 +47,6 @@
 #include "qevent.h"
 #include "qimage.h"
 #include "qlayout.h"
-#include "qlibrary.h"
 #include "qpainter.h"
 #include "qstack.h"
 #include "qt_windows.h"
@@ -65,6 +64,7 @@
 #include <private/qapplication_p.h>
 #include <private/qwininputcontext_p.h>
 #include <private/qpaintengine_raster_p.h>
+#include <private/qsystemlibrary_p.h>
 
 #if defined(Q_WS_WINCE)
 #include "qguifunctions_wince.h"
@@ -148,7 +148,7 @@ static void init_wintab_functions()
 #else
     if (!qt_is_gui_used)
         return;
-    QLibrary library(QLatin1String("wintab32"));
+    QSystemLibrary library(QLatin1String("wintab32"));
     ptrWTOpen = (PtrWTOpen)library.resolve("WTOpenW");
     ptrWTInfo = (PtrWTInfo)library.resolve("WTInfoW");
     ptrWTClose = (PtrWTClose)library.resolve("WTClose");
@@ -1890,7 +1890,7 @@ void QWidgetPrivate::setWindowOpacity_sys(qreal level)
     static bool function_resolved = false;
     if (!function_resolved) {
         ptrSetLayeredWindowAttributes =
-            (PtrSetLayeredWindowAttributes) QLibrary::resolve(QLatin1String("user32"),
+            (PtrSetLayeredWindowAttributes) QSystemLibrary::resolve(QLatin1String("user32"),
                                                               "SetLayeredWindowAttributes");
         function_resolved = true;
     }
diff --git a/src/gui/painting/qdrawhelper.cpp b/src/gui/painting/qdrawhelper.cpp
index 03ed597..bd5b0bd 100644
--- a/src/gui/painting/qdrawhelper.cpp
+++ b/src/gui/painting/qdrawhelper.cpp
@@ -659,19 +659,59 @@ const uint * QT_FASTCALL fetchTransformed(uint *buffer, const Operator *, const
   interpolate 4 argb pixels with the distx and disty factor.
   distx and disty bust be between 0 and 16
  */
-static inline uint interpolate_4_pixels_16(uint tl, uint tr, uint bl, uint br, int distx, int disty, int idistx, int idisty)
-{
-    uint tlrb = ((tl & 0x00ff00ff) * idistx * idisty);
-    uint tlag = (((tl & 0xff00ff00) >> 8) * idistx * idisty);
-    uint trrb = ((tr & 0x00ff00ff) * distx * idisty);
-    uint trag = (((tr & 0xff00ff00) >> 8) * distx * idisty);
-    uint blrb = ((bl & 0x00ff00ff) * idistx * disty);
-    uint blag = (((bl & 0xff00ff00) >> 8) * idistx * disty);
-    uint brrb = ((br & 0x00ff00ff) * distx * disty);
-    uint brag = (((br & 0xff00ff00) >> 8) * distx * disty);
+static inline uint interpolate_4_pixels_16(uint tl, uint tr, uint bl, uint br, int distx, int disty)
+{
+    uint distxy = distx * disty;
+    //idistx * disty = (16-distx) * disty = 16*disty - distxy
+    //idistx * idisty = (16-distx) * (16-disty) = 16*16 - 16*distx -16*dity + distxy
+    uint tlrb = (tl & 0x00ff00ff)         * (16*16 - 16*distx - 16*disty + distxy);
+    uint tlag = ((tl & 0xff00ff00) >> 8)  * (16*16 - 16*distx - 16*disty + distxy);
+    uint trrb = ((tr & 0x00ff00ff)        * (distx*16 - distxy));
+    uint trag = (((tr & 0xff00ff00) >> 8) * (distx*16 - distxy));
+    uint blrb = ((bl & 0x00ff00ff)        * (disty*16 - distxy));
+    uint blag = (((bl & 0xff00ff00) >> 8) * (disty*16 - distxy));
+    uint brrb = ((br & 0x00ff00ff)        * (distxy));
+    uint brag = (((br & 0xff00ff00) >> 8) * (distxy));
     return (((tlrb + trrb + blrb + brrb) >> 8) & 0x00ff00ff) | ((tlag + trag + blag + brag) & 0xff00ff00);
 }
 
+#if defined(QT_ALWAYS_HAVE_SSE2)
+#define interpolate_4_pixels_16_sse2(tl, tr, bl, br, distx, disty, colorMask, v_256, b)  \
+{ \
+    const __m128i dxdy = _mm_mullo_epi16 (distx, disty); \
+    const __m128i distx_ = _mm_slli_epi16(distx, 4); \
+    const __m128i disty_ = _mm_slli_epi16(disty, 4); \
+    const __m128i idxidy =  _mm_add_epi16(dxdy, _mm_sub_epi16(v_256, _mm_add_epi16(distx_, disty_))); \
+    const __m128i dxidy =  _mm_sub_epi16(distx_, dxdy); \
+    const __m128i idxdy =  _mm_sub_epi16(disty_, dxdy); \
+ \
+    __m128i tlAG = _mm_srli_epi16(tl, 8); \
+    __m128i tlRB = _mm_and_si128(tl, colorMask); \
+    __m128i trAG = _mm_srli_epi16(tr, 8); \
+    __m128i trRB = _mm_and_si128(tr, colorMask); \
+    __m128i blAG = _mm_srli_epi16(bl, 8); \
+    __m128i blRB = _mm_and_si128(bl, colorMask); \
+    __m128i brAG = _mm_srli_epi16(br, 8); \
+    __m128i brRB = _mm_and_si128(br, colorMask); \
+ \
+    tlAG = _mm_mullo_epi16(tlAG, idxidy); \
+    tlRB = _mm_mullo_epi16(tlRB, idxidy); \
+    trAG = _mm_mullo_epi16(trAG, dxidy); \
+    trRB = _mm_mullo_epi16(trRB, dxidy); \
+    blAG = _mm_mullo_epi16(blAG, idxdy); \
+    blRB = _mm_mullo_epi16(blRB, idxdy); \
+    brAG = _mm_mullo_epi16(brAG, dxdy); \
+    brRB = _mm_mullo_epi16(brRB, dxdy); \
+ \
+    /* Add the values, and shift to only keep 8 significant bits per colors */ \
+    __m128i rAG =_mm_add_epi16(_mm_add_epi16(tlAG, trAG), _mm_add_epi16(blAG, brAG)); \
+    __m128i rRB =_mm_add_epi16(_mm_add_epi16(tlRB, trRB), _mm_add_epi16(blRB, brRB)); \
+    rAG = _mm_andnot_si128(colorMask, rAG); \
+    rRB = _mm_srli_epi16(rRB, 8); \
+    _mm_storeu_si128((__m128i*)(b), _mm_or_si128(rAG, rRB)); \
+}
+#endif
+
 
 template<TextureBlendType blendType>
 Q_STATIC_TEMPLATE_FUNCTION inline void fetchTransformedBilinear_pixelBounds(int max, int l1, int l2, int &v1, int &v2)
@@ -721,7 +761,7 @@ const uint * QT_FASTCALL fetchTransformedBilinear(uint *buffer, const Operator *
     const qreal cx = x + 0.5;
     const qreal cy = y + 0.5;
 
-    const uint *end = buffer + length;
+    uint *end = buffer + length;
     uint *b = buffer;
     if (data->fast_matrix) {
         // The increment pr x in the scanline
@@ -879,7 +919,75 @@ const uint * QT_FASTCALL fetchTransformedBilinear(uint *buffer, const Operator *
                 const uchar *s1 = data->texture.scanLine(y1);
                 const uchar *s2 = data->texture.scanLine(y2);
                 int disty = (fy & 0x0000ffff) >> 12;
-                int idisty = 16 - disty;
+
+#if defined(QT_ALWAYS_HAVE_SSE2)
+                if (blendType != BlendTransformedBilinearTiled &&
+                    (format == QImage::Format_ARGB32_Premultiplied || format == QImage::Format_RGB32)) {
+
+                    //prolog to get into the bounds
+                    while (b < end) {
+                        int x1 = (fx >> 16);
+                        int x2;
+                        fetchTransformedBilinear_pixelBounds<blendType>(image_width, image_x1, image_x2, x1, x2);
+                        if (x1 != x2) //break if we are insided the bounds.
+                            break;
+                        uint tl = fetch(s1, x1, data->texture.colorTable);
+                        uint tr = fetch(s1, x2, data->texture.colorTable);
+                        uint bl = fetch(s2, x1, data->texture.colorTable);
+                        uint br = fetch(s2, x2, data->texture.colorTable);
+                        int distx = (fx & 0x0000ffff) >> 12;
+                        *b = interpolate_4_pixels_16(tl, tr, bl, br, distx, disty);
+                        fx += fdx;
+                        ++b;
+                    }
+                    uint *boundedEnd;
+                    if (fdx > 0)
+                        boundedEnd = qMin(end, buffer + uint((image_x2 - (fx >> 16)) / data->m11));
+                    else
+                        boundedEnd = qMin(end, buffer + uint((image_x1 - (fx >> 16)) / data->m11));
+                    boundedEnd -= 3;
+
+                    const __m128i colorMask = _mm_set1_epi32(0x00ff00ff);
+                    //const __m128i distShuffleMask = _mm_set_epi8(13, 12, 13, 12, 9, 8, 9, 8, 5, 4, 5, 4, 1, 0, 1, 0);
+                    const __m128i v_256 = _mm_set1_epi16(256);
+                    const __m128i v_disty = _mm_set1_epi16(disty);
+                    __m128i v_fdx = _mm_set1_epi32(fdx*4);
+
+                    ptrdiff_t secondLine = reinterpret_cast<const uint *>(s2) - reinterpret_cast<const uint *>(s1);
+
+                    union Vect_buffer { __m128i vect; quint32 i[4]; };
+                    Vect_buffer v_fx;
+
+                    for (int i = 0; i < 4; i++) {
+                        v_fx.i[i] = fx;
+                        fx += fdx;
+                    }
+
+                    while (b < boundedEnd) {
+
+                        Vect_buffer tl, tr, bl, br;
+
+                        for (int i = 0; i < 4; i++) {
+                            int x1 = v_fx.i[i] >> 16;
+                            const uint *addr_tl = reinterpret_cast<const uint *>(s1) + x1;
+                            const uint *addr_tr = addr_tl + 1;
+                            tl.i[i] = *addr_tl;
+                            tr.i[i] = *addr_tr;
+                            bl.i[i] = *(addr_tl+secondLine);
+                            br.i[i] = *(addr_tr+secondLine);
+                        }
+                        __m128i v_distx = _mm_srli_epi16(v_fx.vect, 12);      //distx = (fx & 0x0000ffff) >> 12;
+                        //v_distx = _mm_shuffle_epi8(v_disty, distShuffleMask); //distx |= distx << 16;
+                        v_distx = _mm_shufflehi_epi16(v_distx, _MM_SHUFFLE(2,2,0,0));
+                        v_distx = _mm_shufflelo_epi16(v_distx, _MM_SHUFFLE(2,2,0,0));
+
+                        interpolate_4_pixels_16_sse2(tl.vect, tr.vect, bl.vect, br.vect, v_distx, v_disty, colorMask, v_256, b);
+                        b+=4;
+                        v_fx.vect = _mm_add_epi32(v_fx.vect, v_fdx);
+                    }
+                    fx = v_fx.i[0];
+                }
+#endif
                 while (b < end) {
                     int x1 = (fx >> 16);
                     int x2;
@@ -889,8 +997,7 @@ const uint * QT_FASTCALL fetchTransformedBilinear(uint *buffer, const Operator *
                     uint bl = fetch(s2, x1, data->texture.colorTable);
                     uint br = fetch(s2, x2, data->texture.colorTable);
                     int distx = (fx & 0x0000ffff) >> 12;
-                    int idistx = 16 - distx;
-                    *b = interpolate_4_pixels_16(tl, tr, bl, br, distx, disty, idistx, idisty);
+                    *b = interpolate_4_pixels_16(tl, tr, bl, br, distx, disty);
                     fx += fdx;
                     ++b;
                 }
@@ -949,10 +1056,8 @@ const uint * QT_FASTCALL fetchTransformedBilinear(uint *buffer, const Operator *
 
                     int distx = (fx & 0x0000ffff) >> 12;
                     int disty = (fy & 0x0000ffff) >> 12;
-                    int idistx = 16 - distx;
-                    int idisty = 16 - disty;
 
-                    *b = interpolate_4_pixels_16(tl, tr, bl, br, distx, disty, idistx, idisty);
+                    *b = interpolate_4_pixels_16(tl, tr, bl, br, distx, disty);
 
                     fx += fdx;
                     fy += fdy;
diff --git a/src/gui/painting/qtransform.h b/src/gui/painting/qtransform.h
index 212a582..11f2673 100644
--- a/src/gui/painting/qtransform.h
+++ b/src/gui/painting/qtransform.h
@@ -64,7 +64,6 @@ class QVariant;
 
 class Q_GUI_EXPORT QTransform
 {
-    Q_ENUMS(TransformationType)
 public:
     enum TransformationType {
         TxNone      = 0x00,
diff --git a/src/gui/styles/qwindowsstyle.cpp b/src/gui/styles/qwindowsstyle.cpp
index 579dd0b..720dd6d 100644
--- a/src/gui/styles/qwindowsstyle.cpp
+++ b/src/gui/styles/qwindowsstyle.cpp
@@ -44,7 +44,7 @@
 
 #if !defined(QT_NO_STYLE_WINDOWS) || defined(QT_PLUGIN)
 
-#include "qlibrary.h"
+#include <private/qsystemlibrary_p.h>
 #include "qapplication.h"
 #include "qbitmap.h"
 #include "qdrawutil.h" // for now
@@ -126,7 +126,7 @@ QWindowsStylePrivate::QWindowsStylePrivate()
 #if defined(Q_WS_WIN) && !defined(Q_OS_WINCE)
     if ((QSysInfo::WindowsVersion >= QSysInfo::WV_VISTA
         && QSysInfo::WindowsVersion < QSysInfo::WV_NT_based)) {
-        QLibrary shellLib(QLatin1String("shell32"));
+        QSystemLibrary shellLib(QLatin1String("shell32"));
         pSHGetStockIconInfo = (PtrSHGetStockIconInfo)shellLib.resolve("SHGetStockIconInfo");
     }
 #endif
@@ -921,9 +921,9 @@ static const char *const question_xpm[] = {
 static QPixmap loadIconFromShell32( int resourceId, int size )
 {
 #ifdef Q_OS_WINCE
-    HMODULE hmod = LoadLibrary(L"ceshell.dll");
+    HMODULE hmod = LoadLibrary(L"ceshell");
 #else
-    HMODULE hmod = LoadLibrary(L"shell32.dll");
+    HMODULE hmod = QSystemLibrary::load(L"shell32");
 #endif
     if( hmod ) {
         HICON iconHandle = (HICON)LoadImage(hmod, MAKEINTRESOURCE(resourceId), IMAGE_ICON, size, size, 0);
diff --git a/src/gui/styles/qwindowsvistastyle.cpp b/src/gui/styles/qwindowsvistastyle.cpp
index 8511592..58542e5 100644
--- a/src/gui/styles/qwindowsvistastyle.cpp
+++ b/src/gui/styles/qwindowsvistastyle.cpp
@@ -42,6 +42,7 @@
 #include "qwindowsvistastyle.h"
 #include "qwindowsvistastyle_p.h"
 #include <private/qstylehelper_p.h>
+#include <private/qsystemlibrary_p.h>
 
 #if !defined(QT_NO_STYLE_WINDOWSVISTA) || defined(QT_PLUGIN)
 
@@ -2574,7 +2575,7 @@ bool QWindowsVistaStylePrivate::resolveSymbols()
     static bool tried = false;
     if (!tried) {
         tried = true;
-        QLibrary themeLib(QLatin1String("uxtheme"));
+        QSystemLibrary themeLib(QLatin1String("uxtheme"));
         pSetWindowTheme         = (PtrSetWindowTheme        )themeLib.resolve("SetWindowTheme");
         pIsThemePartDefined     = (PtrIsThemePartDefined    )themeLib.resolve("IsThemePartDefined");
         pGetThemePartSize       = (PtrGetThemePartSize      )themeLib.resolve("GetThemePartSize");
diff --git a/src/gui/styles/qwindowsxpstyle.cpp b/src/gui/styles/qwindowsxpstyle.cpp
index 8743807..d36011c 100644
--- a/src/gui/styles/qwindowsxpstyle.cpp
+++ b/src/gui/styles/qwindowsxpstyle.cpp
@@ -48,7 +48,7 @@
 #include <private/qapplication_p.h>
 #include <private/qstylehelper_p.h>
 #include <private/qwidget_p.h>
-#include <qlibrary.h>
+#include <private/qsystemlibrary_p.h>
 #include <qpainter.h>
 #include <qpaintengine.h>
 #include <qwidget.h>
@@ -344,7 +344,7 @@ bool QWindowsXPStylePrivate::resolveSymbols()
     static bool tried = false;
     if (!tried) {
         tried = true;
-        QLibrary themeLib(QLatin1String("uxtheme"));
+        QSystemLibrary themeLib(QLatin1String("uxtheme"));
         pIsAppThemed = (PtrIsAppThemed)themeLib.resolve("IsAppThemed");
         if (pIsAppThemed) {
             pIsThemeActive          = (PtrIsThemeActive         )themeLib.resolve("IsThemeActive");
diff --git a/src/gui/text/qfont_s60.cpp b/src/gui/text/qfont_s60.cpp
index 2d547a9..d39f30a 100644
--- a/src/gui/text/qfont_s60.cpp
+++ b/src/gui/text/qfont_s60.cpp
@@ -49,16 +49,11 @@ QT_BEGIN_NAMESPACE
 
 #ifdef QT_NO_FREETYPE
 Q_GLOBAL_STATIC(QMutex, lastResortFamilyMutex);
+extern QStringList qt_symbian_fontFamiliesOnFontServer(); // qfontdatabase_s60.cpp
 Q_GLOBAL_STATIC_WITH_INITIALIZER(QStringList, fontFamiliesOnFontServer, {
-    QSymbianFbsHeapLock lock(QSymbianFbsHeapLock::Unlock);
-    const int numTypeFaces = S60->screenDevice()->NumTypefaces();
-    for (int i = 0; i < numTypeFaces; i++) {
-        TTypefaceSupport typefaceSupport;
-        S60->screenDevice()->TypefaceSupport(typefaceSupport, i);
-        const QString familyName((const QChar *)typefaceSupport.iTypeface.iName.Ptr(), typefaceSupport.iTypeface.iName.Length());
-        x->append(familyName);
-    }
-    lock.relock();
+    // We are only interested in the initial font families. No Application fonts.
+    // Therefore, we are allowed to cache the list.
+    x->append(qt_symbian_fontFamiliesOnFontServer());
 });
 #endif // QT_NO_FREETYPE
 
diff --git a/src/gui/text/qfontdatabase_s60.cpp b/src/gui/text/qfontdatabase_s60.cpp
index 0b38aab..ec252cd 100644
--- a/src/gui/text/qfontdatabase_s60.cpp
+++ b/src/gui/text/qfontdatabase_s60.cpp
@@ -58,6 +58,21 @@
 
 QT_BEGIN_NAMESPACE
 
+QStringList qt_symbian_fontFamiliesOnFontServer() // Also used in qfont_s60.cpp
+{
+    QStringList result;
+    QSymbianFbsHeapLock lock(QSymbianFbsHeapLock::Unlock);
+    const int numTypeFaces = S60->screenDevice()->NumTypefaces();
+    for (int i = 0; i < numTypeFaces; i++) {
+        TTypefaceSupport typefaceSupport;
+        S60->screenDevice()->TypefaceSupport(typefaceSupport, i);
+        const QString familyName((const QChar *)typefaceSupport.iTypeface.iName.Ptr(), typefaceSupport.iTypeface.iName.Length());
+        result.append(familyName);
+    }
+    lock.relock();
+    return result;
+}
+
 QFileInfoList alternativeFilePaths(const QString &path, const QStringList &nameFilters,
     QDir::Filters filters = QDir::NoFilter, QDir::SortFlags sort = QDir::NoSort,
     bool uniqueFileNames = true)
@@ -99,6 +114,7 @@ public:
     ~QSymbianFontDatabaseExtrasImplementation();
 
     const QSymbianTypeFaceExtras *extras(const QString &typeface, bool bold, bool italic) const;
+    void addFontFileToFontStore(const QFileInfo &fontFileInfo);
 
 #ifndef Q_SYMBIAN_HAS_FONTTABLE_API
     struct CFontFromFontStoreReleaser {
@@ -150,11 +166,8 @@ QSymbianFontDatabaseExtrasImplementation::QSymbianFontDatabaseExtrasImplementati
         m_store->InstallRasterizerL(m_rasterizer);
         CleanupStack::Pop(m_rasterizer););
 
-    foreach (const QFileInfo &fontFileInfo, fontFiles) {
-        const QString fontFile = QDir::toNativeSeparators(fontFileInfo.absoluteFilePath());
-        TPtrC fontFilePtr(qt_QString2TPtrC(fontFile));
-        QT_TRAP_THROWING(m_store->AddFileL(fontFilePtr));
-    }
+    foreach (const QFileInfo &fontFileInfo, fontFiles)
+        addFontFileToFontStore(fontFileInfo);
 #endif // !Q_SYMBIAN_HAS_FONTTABLE_API
 }
 
@@ -250,6 +263,14 @@ const QSymbianTypeFaceExtras *QSymbianFontDatabaseExtrasImplementation::extras(c
     }
     return m_extrasHash.value(searchKey);
 }
+
+void QSymbianFontDatabaseExtrasImplementation::addFontFileToFontStore(const QFileInfo &fontFileInfo)
+{
+    const QString fontFile = QDir::toNativeSeparators(fontFileInfo.absoluteFilePath());
+    TPtrC fontFilePtr(qt_QString2TPtrC(fontFile));
+    QT_TRAP_THROWING(m_store->AddFileL(fontFilePtr));
+}
+
 #else // QT_NO_FREETYPE
 class QFontEngineFTS60 : public QFontEngineFT
 {
@@ -310,6 +331,57 @@ void QFontEngineMultiS60::loadEngine(int at)
     Q_ASSERT(engines[at]);
 }
 
+static bool addFontToScreenDevice(int screenDeviceFontIndex,
+                                  const QSymbianFontDatabaseExtrasImplementation *dbExtras)
+{    
+    TTypefaceSupport typefaceSupport;
+        S60->screenDevice()->TypefaceSupport(typefaceSupport, screenDeviceFontIndex);
+    CFont *font; // We have to get a font instance in order to know all the details
+    TFontSpec fontSpec(typefaceSupport.iTypeface.iName, 11);
+    if (S60->screenDevice()->GetNearestFontInPixels(font, fontSpec) != KErrNone)
+        return false;
+    QScopedPointer<CFont, QSymbianFontDatabaseExtrasImplementation::CFontFromScreenDeviceReleaser> sFont(font);
+    if (font->TypeUid() != KCFbsFontUid)
+        return false;
+    TOpenFontFaceAttrib faceAttrib;
+    const CFbsFont *cfbsFont = static_cast<const CFbsFont *>(font);
+    cfbsFont->GetFaceAttrib(faceAttrib);
+
+    QtFontStyle::Key styleKey;
+    styleKey.style = faceAttrib.IsItalic()?QFont::StyleItalic:QFont::StyleNormal;
+    styleKey.weight = faceAttrib.IsBold()?QFont::Bold:QFont::Normal;
+
+    QString familyName((const QChar *)typefaceSupport.iTypeface.iName.Ptr(), typefaceSupport.iTypeface.iName.Length());
+    QtFontFamily *family = privateDb()->family(familyName, true);
+    family->fixedPitch = faceAttrib.IsMonoWidth();
+    QtFontFoundry *foundry = family->foundry(QString(), true);
+    QtFontStyle *style = foundry->style(styleKey, true);
+    style->smoothScalable = typefaceSupport.iIsScalable;
+    style->pixelSize(0, true);
+
+    const QSymbianTypeFaceExtras *typeFaceExtras =
+            dbExtras->extras(familyName, faceAttrib.IsBold(), faceAttrib.IsItalic());
+    const QByteArray os2Table = typeFaceExtras->getSfntTable(MAKE_TAG('O', 'S', '/', '2'));
+    const unsigned char* data = reinterpret_cast<const unsigned char*>(os2Table.constData());
+    const unsigned char* ulUnicodeRange = data + 42;
+    quint32 unicodeRange[4] = {
+        qFromBigEndian<quint32>(ulUnicodeRange),
+        qFromBigEndian<quint32>(ulUnicodeRange + 4),
+        qFromBigEndian<quint32>(ulUnicodeRange + 8),
+        qFromBigEndian<quint32>(ulUnicodeRange + 12)
+    };
+    const unsigned char* ulCodePageRange = data + 78;
+    quint32 codePageRange[2] = {
+        qFromBigEndian<quint32>(ulCodePageRange),
+        qFromBigEndian<quint32>(ulCodePageRange + 4)
+    };
+    const QList<QFontDatabase::WritingSystem> writingSystems =
+        determineWritingSystemsFromTrueTypeBits(unicodeRange, codePageRange);
+    foreach (const QFontDatabase::WritingSystem system, writingSystems)
+        family->writingSystems[system] = QtFontFamily::Supported;
+    return true;
+}
+
 static void initializeDb()
 {
     QFontDatabasePrivate *db = privateDb();
@@ -325,59 +397,9 @@ static void initializeDb()
     const int numTypeFaces = S60->screenDevice()->NumTypefaces();
     const QSymbianFontDatabaseExtrasImplementation *dbExtras =
             static_cast<const QSymbianFontDatabaseExtrasImplementation*>(db->symbianExtras);
-    bool fontAdded = false;
-    for (int i = 0; i < numTypeFaces; i++) {
-        TTypefaceSupport typefaceSupport;
-        S60->screenDevice()->TypefaceSupport(typefaceSupport, i);
-        CFont *font; // We have to get a font instance in order to know all the details
-        TFontSpec fontSpec(typefaceSupport.iTypeface.iName, 11);
-        if (S60->screenDevice()->GetNearestFontInPixels(font, fontSpec) != KErrNone)
-            continue;
-        QScopedPointer<CFont, QSymbianFontDatabaseExtrasImplementation::CFontFromScreenDeviceReleaser> sFont(font);
-        if (font->TypeUid() == KCFbsFontUid) {
-            TOpenFontFaceAttrib faceAttrib;
-            const CFbsFont *cfbsFont = static_cast<const CFbsFont *>(font);
-            cfbsFont->GetFaceAttrib(faceAttrib);
-
-            QtFontStyle::Key styleKey;
-            styleKey.style = faceAttrib.IsItalic()?QFont::StyleItalic:QFont::StyleNormal;
-            styleKey.weight = faceAttrib.IsBold()?QFont::Bold:QFont::Normal;
-
-            QString familyName((const QChar *)typefaceSupport.iTypeface.iName.Ptr(), typefaceSupport.iTypeface.iName.Length());
-            QtFontFamily *family = db->family(familyName, true);
-            family->fixedPitch = faceAttrib.IsMonoWidth();
-            QtFontFoundry *foundry = family->foundry(QString(), true);
-            QtFontStyle *style = foundry->style(styleKey, true);
-            style->smoothScalable = typefaceSupport.iIsScalable;
-            style->pixelSize(0, true);
-
-            const QSymbianTypeFaceExtras *typeFaceExtras =
-                    dbExtras->extras(familyName, faceAttrib.IsBold(), faceAttrib.IsItalic());
-            const QByteArray os2Table = typeFaceExtras->getSfntTable(MAKE_TAG('O', 'S', '/', '2'));
-            const unsigned char* data = reinterpret_cast<const unsigned char*>(os2Table.constData());
-            const unsigned char* ulUnicodeRange = data + 42;
-            quint32 unicodeRange[4] = {
-                qFromBigEndian<quint32>(ulUnicodeRange),
-                qFromBigEndian<quint32>(ulUnicodeRange + 4),
-                qFromBigEndian<quint32>(ulUnicodeRange + 8),
-                qFromBigEndian<quint32>(ulUnicodeRange + 12)
-            };
-            const unsigned char* ulCodePageRange = data + 78;
-            quint32 codePageRange[2] = {
-                qFromBigEndian<quint32>(ulCodePageRange),
-                qFromBigEndian<quint32>(ulCodePageRange + 4)
-            };
-            const QList<QFontDatabase::WritingSystem> writingSystems =
-                determineWritingSystemsFromTrueTypeBits(unicodeRange, codePageRange);
-            foreach (const QFontDatabase::WritingSystem system, writingSystems)
-                family->writingSystems[system] = QtFontFamily::Supported;
-
-            fontAdded = true;
-        }
-    }
+    for (int i = 0; i < numTypeFaces; i++)
+        addFontToScreenDevice(i, dbExtras);
 
-    Q_ASSERT(fontAdded);
-    
     lock.relock();
 
 #else // QT_NO_FREETYPE
diff --git a/src/gui/text/qfontdatabase_win.cpp b/src/gui/text/qfontdatabase_win.cpp
index c50d363..8a03c5d 100644
--- a/src/gui/text/qfontdatabase_win.cpp
+++ b/src/gui/text/qfontdatabase_win.cpp
@@ -45,7 +45,7 @@
 #include "qfont_p.h"
 #include "qfontengine_p.h"
 #include "qpaintdevice.h"
-#include "qlibrary.h"
+#include <private/qsystemlibrary_p.h>
 #include "qabstractfileengine.h"
 #include "qendian.h"
 
@@ -1049,7 +1049,7 @@ static void registerFont(QFontDatabasePrivate::ApplicationFont *fnt)
 {
     if(!fnt->data.isEmpty()) {
 #ifndef Q_OS_WINCE
-        PtrAddFontMemResourceEx ptrAddFontMemResourceEx = (PtrAddFontMemResourceEx)QLibrary::resolve(QLatin1String("gdi32"),
+        PtrAddFontMemResourceEx ptrAddFontMemResourceEx = (PtrAddFontMemResourceEx)QSystemLibrary::resolve(QLatin1String("gdi32"),
                                                                                                      "AddFontMemResourceEx");
         if (!ptrAddFontMemResourceEx)
             return;
@@ -1111,7 +1111,7 @@ static void registerFont(QFontDatabasePrivate::ApplicationFont *fnt)
         if (AddFontResource((LPCWSTR)fnt->fileName.utf16()) == 0)
             return;
 #else
-        PtrAddFontResourceExW ptrAddFontResourceExW = (PtrAddFontResourceExW)QLibrary::resolve(QLatin1String("gdi32"),
+        PtrAddFontResourceExW ptrAddFontResourceExW = (PtrAddFontResourceExW)QSystemLibrary::resolve(QLatin1String("gdi32"),
                                                                                                "AddFontResourceExW");
         if (!ptrAddFontResourceExW
             || ptrAddFontResourceExW((wchar_t*)fnt->fileName.utf16(), FR_PRIVATE, 0) == 0)
@@ -1140,7 +1140,7 @@ bool QFontDatabase::removeApplicationFont(int handle)
         if (!removeSucceeded)
             return false;
 #else
-        PtrRemoveFontMemResourceEx ptrRemoveFontMemResourceEx = (PtrRemoveFontMemResourceEx)QLibrary::resolve(QLatin1String("gdi32"),
+        PtrRemoveFontMemResourceEx ptrRemoveFontMemResourceEx = (PtrRemoveFontMemResourceEx)QSystemLibrary::resolve(QLatin1String("gdi32"),
                                                                                                               "RemoveFontMemResourceEx");
         if (!ptrRemoveFontMemResourceEx
             || !ptrRemoveFontMemResourceEx(font.handle))
@@ -1151,7 +1151,7 @@ bool QFontDatabase::removeApplicationFont(int handle)
         if (!RemoveFontResource((LPCWSTR)font.fileName.utf16()))
             return false;
 #else
-        PtrRemoveFontResourceExW ptrRemoveFontResourceExW = (PtrRemoveFontResourceExW)QLibrary::resolve(QLatin1String("gdi32"),
+        PtrRemoveFontResourceExW ptrRemoveFontResourceExW = (PtrRemoveFontResourceExW)QSystemLibrary::resolve(QLatin1String("gdi32"),
                                                                                                         "RemoveFontResourceExW");
         if (!ptrRemoveFontResourceExW
             || !ptrRemoveFontResourceExW((LPCWSTR)font.fileName.utf16(), FR_PRIVATE, 0))
diff --git a/src/gui/text/qfontengine_win.cpp b/src/gui/text/qfontengine_win.cpp
index 4bed2b5..82de0d5 100644
--- a/src/gui/text/qfontengine_win.cpp
+++ b/src/gui/text/qfontengine_win.cpp
@@ -50,7 +50,7 @@
 #include "qt_windows.h"
 #include <private/qapplication_p.h>
 
-#include <qlibrary.h>
+#include <private/qsystemlibrary_p.h>
 #include <qpaintdevice.h>
 #include <qpainter.h>
 #include <limits.h>
@@ -140,7 +140,7 @@ static void resolveGetCharWidthI()
     if (resolvedGetCharWidthI)
         return;
     resolvedGetCharWidthI = true;
-    ptrGetCharWidthI = (PtrGetCharWidthI)QLibrary::resolve(QLatin1String("gdi32"), "GetCharWidthI");
+    ptrGetCharWidthI = (PtrGetCharWidthI)QSystemLibrary::resolve(QLatin1String("gdi32"), "GetCharWidthI");
 }
 #endif // !defined(Q_WS_WINCE)
 
diff --git a/src/gui/util/qdesktopservices_win.cpp b/src/gui/util/qdesktopservices_win.cpp
index aab7e16..735de04 100644
--- a/src/gui/util/qdesktopservices_win.cpp
+++ b/src/gui/util/qdesktopservices_win.cpp
@@ -41,7 +41,7 @@
 
 #include <qsettings.h>
 #include <qdir.h>
-#include <qlibrary.h>
+#include <private/qsystemlibrary_p.h>
 #include <qurl.h>
 #include <qstringlist.h>
 #include <qprocess.h>
@@ -177,9 +177,9 @@ QString QDesktopServices::storageLocation(StandardLocation type)
     QString result;
 
 #ifndef Q_OS_WINCE
-        QLibrary library(QLatin1String("shell32"));
+        QSystemLibrary library(QLatin1String("shell32"));
 #else
-        QLibrary library(QLatin1String("coredll"));
+        QSystemLibrary library(QLatin1String("coredll"));
 #endif // Q_OS_WINCE
     typedef BOOL (WINAPI*GetSpecialFolderPath)(HWND, LPWSTR, int, BOOL);
     static GetSpecialFolderPath SHGetSpecialFolderPath =
diff --git a/src/gui/util/qsystemtrayicon_win.cpp b/src/gui/util/qsystemtrayicon_win.cpp
index a9585b9..fc5de44 100644
--- a/src/gui/util/qsystemtrayicon_win.cpp
+++ b/src/gui/util/qsystemtrayicon_win.cpp
@@ -54,7 +54,7 @@
 #include <windowsx.h>
 #include <commctrl.h>
 
-#include <QLibrary>
+#include <private/qsystemlibrary_p.h>
 #include <QApplication>
 #include <QSettings>
 
@@ -155,14 +155,14 @@ QSystemTrayIconSys::QSystemTrayIconSys(QSystemTrayIcon *object)
 
     // Allow the WM_TASKBARCREATED message through the UIPI filter on Windows Vista and higher
     static PtrChangeWindowMessageFilterEx pChangeWindowMessageFilterEx =
-        (PtrChangeWindowMessageFilterEx)QLibrary::resolve(QLatin1String("user32"), "ChangeWindowMessageFilterEx");
+        (PtrChangeWindowMessageFilterEx)QSystemLibrary::resolve(QLatin1String("user32"), "ChangeWindowMessageFilterEx");
 
     if (pChangeWindowMessageFilterEx) {
         // Call the safer ChangeWindowMessageFilterEx API if available
         pChangeWindowMessageFilterEx(winId(), MYWM_TASKBARCREATED, Q_MSGFLT_ALLOW, 0);
     } else {
         static PtrChangeWindowMessageFilter pChangeWindowMessageFilter =
-            (PtrChangeWindowMessageFilter)QLibrary::resolve(QLatin1String("user32"), "ChangeWindowMessageFilter");
+            (PtrChangeWindowMessageFilter)QSystemLibrary::resolve(QLatin1String("user32"), "ChangeWindowMessageFilter");
 
         if (pChangeWindowMessageFilter) {
             // Call the deprecated ChangeWindowMessageFilter API otherwise
@@ -350,7 +350,7 @@ void QSystemTrayIconPrivate::install_sys()
 QRect QSystemTrayIconSys::findIconGeometry(const int iconId)
 {
     static PtrShell_NotifyIconGetRect Shell_NotifyIconGetRect =
-        (PtrShell_NotifyIconGetRect)QLibrary::resolve(QLatin1String("shell32"), "Shell_NotifyIconGetRect");
+        (PtrShell_NotifyIconGetRect)QSystemLibrary::resolve(QLatin1String("shell32"), "Shell_NotifyIconGetRect");
 
     if (Shell_NotifyIconGetRect) {
         Q_NOTIFYICONIDENTIFIER nid;
diff --git a/src/gui/widgets/qcombobox.cpp b/src/gui/widgets/qcombobox.cpp
index 917a325..96d2acd 100644
--- a/src/gui/widgets/qcombobox.cpp
+++ b/src/gui/widgets/qcombobox.cpp
@@ -2849,7 +2849,8 @@ void QComboBox::mousePressEvent(QMouseEvent *e)
         if (sc == QStyle::SC_ComboBoxArrow)
             d->updateArrow(QStyle::State_Sunken);
 #ifdef QT_KEYPAD_NAVIGATION
-        if (!d->lineEdit) {
+        //if the container already exists, then d->viewContainer() is safe to call
+        if (d->container) {
 #endif
             // We've restricted the next couple of lines, because by not calling
             // viewContainer(), we avoid creating the QComboBoxPrivateContainer.
diff --git a/src/gui/widgets/qlinecontrol.cpp b/src/gui/widgets/qlinecontrol.cpp
index 35fed0c..f338f40 100644
--- a/src/gui/widgets/qlinecontrol.cpp
+++ b/src/gui/widgets/qlinecontrol.cpp
@@ -527,7 +527,7 @@ void QLineControl::draw(QPainter *painter, const QPoint &offset, const QRect &cl
         int cursor = m_cursor;
         if (m_preeditCursor != -1)
             cursor += m_preeditCursor;
-        if(!m_blinkPeriod || m_blinkStatus)
+        if (!m_hideCursor && (!m_blinkPeriod || m_blinkStatus))
             m_textLayout.drawCursor(painter, offset, cursor, m_cursorWidth);
     }
 }
diff --git a/src/gui/widgets/qlineedit.cpp b/src/gui/widgets/qlineedit.cpp
index 981e934..caaef68 100644
--- a/src/gui/widgets/qlineedit.cpp
+++ b/src/gui/widgets/qlineedit.cpp
@@ -1929,7 +1929,11 @@ void QLineEdit::paintEvent(QPaintEvent *)
         // text doesn't fit, text document is to the left of lineRect; align
         // right
         d->hscroll = widthUsed - lineRect.width() + 1;
+    } else {
+        //in case the text is bigger than the lineedit, the hscroll can never be negative
+        d->hscroll = qMax(0, d->hscroll);
     }
+
     // the y offset is there to keep the baseline constant in case we have script changes in the text.
     QPoint topLeft = lineRect.topLeft() - QPoint(d->hscroll, d->control->ascent() - fm.ascent());