Merge 5.12 into 5.12.0

Change-Id: I31f8eff4fdfe56cbb7f1450be8d351991966c6d8

24 files changed, 261 insertions, 122 deletions

diff --git a/src/3rdparty/angle/qt_attribution.json b/src/3rdparty/angle/qt_attribution.json
index e35e1f0eb9..b10343d945 100644
--- a/src/3rdparty/angle/qt_attribution.json
+++ b/src/3rdparty/angle/qt_attribution.json
@@ -5,6 +5,10 @@
         "QDocModule": "qtgui",
         "QtUsage": "Used on Windows to implement OpenGL ES on top of DirectX. Configure with -no-opengl, or -opengl desktop to exclude.",
 
+        "Description": "The ANGLE library translates OpenGL ES API calls to hardware-supported APIs.",
+        "Homepage": "http://angleproject.org/",
+        "Version": "chromium/3280",
+
         "License": "BSD 3-clause \"New\" or \"Revised\" License",
         "LicenseId": "BSD-3-Clause",
         "LicenseFile": "LICENSE",
diff --git a/src/corelib/global/qendian.h b/src/corelib/global/qendian.h
index 1cc8a823d9..0e67a1ab8e 100644
--- a/src/corelib/global/qendian.h
+++ b/src/corelib/global/qendian.h
@@ -41,6 +41,7 @@
 #ifndef QENDIAN_H
 #define QENDIAN_H
 
+#include <QtCore/qfloat16.h>
 #include <QtCore/qglobal.h>
 
 // include stdlib.h and hope that it defines __GLIBC__ for glibc-based systems
@@ -151,6 +152,31 @@ template <> inline Q_DECL_CONSTEXPR qint8 qbswap<qint8>(qint8 source)
     return source;
 }
 
+// floating specializations
+template<typename Float>
+Float qbswapFloatHelper(Float source)
+{
+    // memcpy call in qFromUnaligned is recognized by optimizer as a correct way of type prunning
+    auto temp = qFromUnaligned<typename QIntegerForSizeof<Float>::Unsigned>(&source);
+    temp = qbswap(temp);
+    return qFromUnaligned<Float>(&temp);
+}
+
+template <> inline qfloat16 qbswap<qfloat16>(qfloat16 source)
+{
+    return qbswapFloatHelper(source);
+}
+
+template <> inline float qbswap<float>(float source)
+{
+    return qbswapFloatHelper(source);
+}
+
+template <> inline double qbswap<double>(double source)
+{
+    return qbswapFloatHelper(source);
+}
+
 /*
  * qbswap(const T src, const void *dest);
  * Changes the byte order of \a src from big endian to little endian or vice versa
diff --git a/src/corelib/io/qiodevice.cpp b/src/corelib/io/qiodevice.cpp
index 5dd5f8031e..86e21f0a66 100644
--- a/src/corelib/io/qiodevice.cpp
+++ b/src/corelib/io/qiodevice.cpp
@@ -333,7 +333,7 @@ QIODevicePrivate::~QIODevicePrivate()
                      allowed. This flag currently only affects QFile. Other
                      classes might use this flag in the future, but until then
                      using this flag with any classes other than QFile may
-                     result in undefined behavior.
+                     result in undefined behavior. (since Qt 5.11)
     \value ExistingOnly Fail if the file to be opened does not exist. This flag
                      must be specified alongside ReadOnly, WriteOnly, or
                      ReadWrite. Note that using this flag with ReadOnly alone
@@ -341,7 +341,7 @@ QIODevicePrivate::~QIODevicePrivate()
                      not exist. This flag currently only affects QFile. Other
                      classes might use this flag in the future, but until then
                      using this flag with any classes other than QFile may
-                     result in undefined behavior.
+                     result in undefined behavior. (since Qt 5.11)
 
     Certain flags, such as \c Unbuffered and \c Truncate, are
     meaningless when used with some subclasses. Some of these
diff --git a/src/gui/painting/qpagedpaintdevice.cpp b/src/gui/painting/qpagedpaintdevice.cpp
index 613a686848..72b2834470 100644
--- a/src/gui/painting/qpagedpaintdevice.cpp
+++ b/src/gui/painting/qpagedpaintdevice.cpp
@@ -290,7 +290,8 @@ QPagedPaintDevicePrivate *QPagedPaintDevice::dd()
 
     \value PdfVersion_A1b A PDF/A-1b compatible document is produced.
 
-    \since 5.10
+    \value PdfVersion_1_6 A PDF 1.6 compatible document is produced.
+           This value was added in Qt 5.12.
 */
 
 /*!
diff --git a/src/gui/painting/qpagedpaintdevice.h b/src/gui/painting/qpagedpaintdevice.h
index c8957edab8..1c37c17fa3 100644
--- a/src/gui/painting/qpagedpaintdevice.h
+++ b/src/gui/painting/qpagedpaintdevice.h
@@ -213,7 +213,7 @@ public:
         Envelope10 = Comm10E
     };
 
-    enum PdfVersion { PdfVersion_1_4, PdfVersion_A1b };
+    enum PdfVersion { PdfVersion_1_4, PdfVersion_A1b, PdfVersion_1_6 };
 
     // ### Qt6 Make these virtual
     bool setPageLayout(const QPageLayout &pageLayout);
diff --git a/src/gui/painting/qpdf.cpp b/src/gui/painting/qpdf.cpp
index 5220c24020..b410e9b900 100644
--- a/src/gui/painting/qpdf.cpp
+++ b/src/gui/painting/qpdf.cpp
@@ -1547,7 +1547,14 @@ void QPdfEnginePrivate::writeHeader()
 {
     addXrefEntry(0,false);
 
-    xprintf("%%PDF-1.4\n");
+    static const QHash<QPdfEngine::PdfVersion, const char *> mapping {
+        {QPdfEngine::Version_1_4, "1.4"},
+        {QPdfEngine::Version_A1b, "1.4"},
+        {QPdfEngine::Version_1_6, "1.6"}
+    };
+    const char *verStr = mapping.value(pdfVersion, "1.4");
+
+    xprintf("%%PDF-%s\n", verStr);
     xprintf("%%\303\242\303\243\n");
 
     writeInfo();
@@ -1880,6 +1887,19 @@ void QPdfEnginePrivate::embedFont(QFontSubset *font)
     }
 }
 
+qreal QPdfEnginePrivate::calcUserUnit() const
+{
+    // PDF standards < 1.6 support max 200x200in pages (no UserUnit)
+    if (pdfVersion < QPdfEngine::Version_1_6)
+        return 1.0;
+
+    const int maxLen = qMax(currentPage->pageSize.width(), currentPage->pageSize.height());
+    if (maxLen <= 14400)
+        return 1.0; // for pages up to 200x200in (14400x14400 units) use default scaling
+
+    // for larger pages, rescale units so we can have up to 381x381km
+    return qMin(maxLen / 14400.0, 75000.0);
+}
 
 void QPdfEnginePrivate::writeFonts()
 {
@@ -1902,6 +1922,8 @@ void QPdfEnginePrivate::writePage()
     uint resources = requestObject();
     uint annots = requestObject();
 
+    qreal userUnit = calcUserUnit();
+
     addXrefEntry(pages.constLast());
     xprintf("<<\n"
             "/Type /Page\n"
@@ -1909,12 +1931,16 @@ void QPdfEnginePrivate::writePage()
             "/Contents %d 0 R\n"
             "/Resources %d 0 R\n"
             "/Annots %d 0 R\n"
-            "/MediaBox [0 0 %d %d]\n"
-            ">>\n"
-            "endobj\n",
+            "/MediaBox [0 0 %f %f]\n",
             pageRoot, pageStream, resources, annots,
             // make sure we use the pagesize from when we started the page, since the user may have changed it
-            currentPage->pageSize.width(), currentPage->pageSize.height());
+            currentPage->pageSize.width() / userUnit, currentPage->pageSize.height() / userUnit);
+
+    if (pdfVersion >= QPdfEngine::Version_1_6)
+        xprintf("/UserUnit %f\n", userUnit);
+
+    xprintf(">>\n"
+            "endobj\n");
 
     addXrefEntry(resources);
     xprintf("<<\n"
@@ -2983,8 +3009,9 @@ void QPdfEnginePrivate::drawTextItem(const QPointF &p, const QTextItemInt &ti)
 
 QTransform QPdfEnginePrivate::pageMatrix() const
 {
-    qreal scale = 72./resolution;
-    QTransform tmp(scale, 0.0, 0.0, -scale, 0.0, m_pageLayout.fullRectPoints().height());
+    qreal userUnit = calcUserUnit();
+    qreal scale = 72. / userUnit / resolution;
+    QTransform tmp(scale, 0.0, 0.0, -scale, 0.0, m_pageLayout.fullRectPoints().height() / userUnit);
     if (m_pageLayout.mode() != QPageLayout::FullPageMode) {
         QRect r = m_pageLayout.paintRectPixels(resolution);
         tmp.translate(r.left(), r.top());
diff --git a/src/gui/painting/qpdf_p.h b/src/gui/painting/qpdf_p.h
index 5a909f2ede..e2526de67d 100644
--- a/src/gui/painting/qpdf_p.h
+++ b/src/gui/painting/qpdf_p.h
@@ -171,7 +171,8 @@ public:
     enum PdfVersion
     {
         Version_1_4,
-        Version_A1b
+        Version_A1b,
+        Version_1_6
     };
 
     QPdfEngine();
@@ -300,6 +301,7 @@ private:
     void writePageRoot();
     void writeFonts();
     void embedFont(QFontSubset *font);
+    qreal calcUserUnit() const;
 
     QVector<int> xrefPositions;
     QDataStream* stream;
diff --git a/src/gui/painting/qpdfwriter.cpp b/src/gui/painting/qpdfwriter.cpp
index e6c5cabd7f..6c85d65538 100644
--- a/src/gui/painting/qpdfwriter.cpp
+++ b/src/gui/painting/qpdfwriter.cpp
@@ -170,11 +170,17 @@ void QPdfWriter::setPdfVersion(PdfVersion version)
 {
     Q_D(QPdfWriter);
 
+    static const QHash<QPdfWriter::PdfVersion, QPdfEngine::PdfVersion> engineMapping {
+        {QPdfWriter::PdfVersion_1_4, QPdfEngine::Version_1_4},
+        {QPdfWriter::PdfVersion_A1b, QPdfEngine::Version_A1b},
+        {QPdfWriter::PdfVersion_1_6, QPdfEngine::Version_1_6}
+    };
+
     if (d->pdfVersion == version)
         return;
 
     d->pdfVersion = version;
-    d->engine->setPdfVersion(d->pdfVersion == QPdfWriter::PdfVersion_1_4 ? QPdfEngine::Version_1_4 : QPdfEngine::Version_A1b);
+    d->engine->setPdfVersion(engineMapping.value(version, QPdfEngine::Version_1_4));
 }
 
 /*!
diff --git a/src/gui/painting/qtriangulator.cpp b/src/gui/painting/qtriangulator.cpp
index 6d57eba123..9be3eeaffd 100644
--- a/src/gui/painting/qtriangulator.cpp
+++ b/src/gui/painting/qtriangulator.cpp
@@ -472,7 +472,7 @@ class QInt64Set
 {
 public:
     inline QInt64Set(int capacity = 64);
-    inline ~QInt64Set() {if (m_array) delete[] m_array;}
+    inline ~QInt64Set() {delete[] m_array;}
     inline bool isValid() const {return m_array;}
     void insert(quint64 key);
     bool contains(quint64 key) const;
@@ -493,10 +493,7 @@ inline QInt64Set::QInt64Set(int capacity)
 {
     m_capacity = primeForCount(capacity);
     m_array = new quint64[m_capacity];
-    if (m_array)
-        clear();
-    else
-        m_capacity = 0;
+    clear();
 }
 
 bool QInt64Set::rehash(int capacity)
@@ -506,28 +503,19 @@ bool QInt64Set::rehash(int capacity)
 
     m_capacity = capacity;
     m_array = new quint64[m_capacity];
-    if (m_array) {
-        clear();
-        if (oldArray) {
-            for (int i = 0; i < oldCapacity; ++i) {
-                if (oldArray[i] != UNUSED)
-                    insert(oldArray[i]);
-            }
-            delete[] oldArray;
-        }
-        return true;
-    } else {
-        m_capacity = oldCapacity;
-        m_array = oldArray;
-        return false;
+    clear();
+    for (int i = 0; i < oldCapacity; ++i) {
+        if (oldArray[i] != UNUSED)
+            insert(oldArray[i]);
     }
+    delete[] oldArray;
+    return true;
 }
 
 void QInt64Set::insert(quint64 key)
 {
     if (m_count > 3 * m_capacity / 4)
         rehash(primeForCount(2 * m_capacity));
-    Q_ASSERT_X(m_array, "QInt64Hash<T>::insert", "Hash set not allocated.");
     int index = int(key % m_capacity);
     for (int i = 0; i < m_capacity; ++i) {
         index += i;
@@ -546,7 +534,6 @@ void QInt64Set::insert(quint64 key)
 
 bool QInt64Set::contains(quint64 key) const
 {
-    Q_ASSERT_X(m_array, "QInt64Hash<T>::contains", "Hash set not allocated.");
     int index = int(key % m_capacity);
     for (int i = 0; i < m_capacity; ++i) {
         index += i;
@@ -562,7 +549,6 @@ bool QInt64Set::contains(quint64 key) const
 
 inline void QInt64Set::clear()
 {
-    Q_ASSERT_X(m_array, "QInt64Hash<T>::clear", "Hash set not allocated.");
     for (int i = 0; i < m_capacity; ++i)
         m_array[i] = UNUSED;
     m_count = 0;
diff --git a/src/plugins/platforms/cocoa/qcocoaapplicationdelegate.mm b/src/plugins/platforms/cocoa/qcocoaapplicationdelegate.mm
index 221a8b0866..44ab16d300 100644
--- a/src/plugins/platforms/cocoa/qcocoaapplicationdelegate.mm
+++ b/src/plugins/platforms/cocoa/qcocoaapplicationdelegate.mm
@@ -86,6 +86,7 @@
 #include <private/qguiapplication_p.h>
 #include "qt_mac_p.h"
 #include <qpa/qwindowsysteminterface.h>
+#include <qwindowdefs.h>
 
 QT_USE_NAMESPACE
 
@@ -93,6 +94,7 @@ QT_USE_NAMESPACE
     bool startedQuit;
     NSObject <NSApplicationDelegate> *reflectionDelegate;
     bool inLaunch;
+    QWindowList hiddenWindows;
 }
 
 + (instancetype)sharedDelegate
@@ -322,12 +324,28 @@ QT_USE_NAMESPACE
     // fact that the application itself is hidden, which will cause a problem when
     // the application is made visible again.
     const QWindowList topLevelWindows = QGuiApplication::topLevelWindows();
-    for (QWindow *topLevelWindow : qAsConst(topLevelWindows)) {
-        if ((topLevelWindow->type() & Qt::Popup) == Qt::Popup && topLevelWindow->isVisible())
+    for (QWindow *topLevelWindow : topLevelWindows) {
+        if ((topLevelWindow->type() & Qt::Popup) == Qt::Popup && topLevelWindow->isVisible()) {
             topLevelWindow->hide();
+
+            if ((topLevelWindow->type() & Qt::Tool) == Qt::Tool)
+                hiddenWindows << topLevelWindow;
+        }
     }
 }
 
+- (void)applicationDidUnhide:(NSNotification *)notification
+{
+    if (reflectionDelegate
+        && [reflectionDelegate respondsToSelector:@selector(applicationDidUnhide:)])
+        [reflectionDelegate applicationDidUnhide:notification];
+
+    for (QWindow *window : qAsConst(hiddenWindows))
+        window->show();
+
+    hiddenWindows.clear();
+}
+
 - (void)applicationDidBecomeActive:(NSNotification *)notification
 {
     if (reflectionDelegate
diff --git a/src/plugins/platforms/cocoa/qcocoaglcontext.mm b/src/plugins/platforms/cocoa/qcocoaglcontext.mm
index 1e1b3907ed..1cd77a22e4 100644
--- a/src/plugins/platforms/cocoa/qcocoaglcontext.mm
+++ b/src/plugins/platforms/cocoa/qcocoaglcontext.mm
@@ -414,7 +414,8 @@ bool QCocoaGLContext::setDrawable(QPlatformSurface *surface)
     // have the same effect as an update.
 
     // Now we are ready to associate the view with the context
-    if ((m_context.view = view) != view) {
+    m_context.view = view;
+    if (m_context.view != view) {
         qCInfo(lcQpaOpenGLContext) << "Failed to set" << view << "as drawable for" << m_context;
         m_updateObservers.clear();
         return false;
diff --git a/src/plugins/platforms/wasm/qwasmeventtranslator.cpp b/src/plugins/platforms/wasm/qwasmeventtranslator.cpp
index 23251fd610..a3fdcd1025 100644
--- a/src/plugins/platforms/wasm/qwasmeventtranslator.cpp
+++ b/src/plugins/platforms/wasm/qwasmeventtranslator.cpp
@@ -546,7 +546,7 @@ int QWasmEventTranslator::touchCallback(int eventType, const EmscriptenTouchEven
     else
         QWindowSystemInterface::handleTouchCancelEvent(window2, wasmEventTranslator->getTimestamp(), wasmEventTranslator->touchDevice, keyModifier);
 
-    QCoreApplication::processEvents();
+    QWasmEventDispatcher::maintainTimers();
     return 1;
 }
 
diff --git a/src/plugins/platforms/windows/qwindowsmousehandler.cpp b/src/plugins/platforms/windows/qwindowsmousehandler.cpp
index c1c275144f..fcdd179a31 100644
--- a/src/plugins/platforms/windows/qwindowsmousehandler.cpp
+++ b/src/plugins/platforms/windows/qwindowsmousehandler.cpp
@@ -207,26 +207,26 @@ static inline MouseEvent eventFromMsg(const MSG &msg)
         return {QEvent::MouseButtonPress, Qt::LeftButton};
     case WM_LBUTTONUP:
         return {QEvent::MouseButtonRelease, Qt::LeftButton};
-    case WM_LBUTTONDBLCLK:
-        return {QEvent::MouseButtonDblClick, Qt::LeftButton};
+    case WM_LBUTTONDBLCLK: // Qt QPA does not handle double clicks, send as press
+        return {QEvent::MouseButtonPress, Qt::LeftButton};
     case WM_MBUTTONDOWN:
         return {QEvent::MouseButtonPress, Qt::MidButton};
     case WM_MBUTTONUP:
         return {QEvent::MouseButtonRelease, Qt::MidButton};
     case WM_MBUTTONDBLCLK:
-        return {QEvent::MouseButtonDblClick, Qt::MidButton};
+        return {QEvent::MouseButtonPress, Qt::MidButton};
     case WM_RBUTTONDOWN:
         return {QEvent::MouseButtonPress, Qt::RightButton};
     case WM_RBUTTONUP:
         return {QEvent::MouseButtonRelease, Qt::RightButton};
     case WM_RBUTTONDBLCLK:
-        return {QEvent::MouseButtonDblClick, Qt::RightButton};
+        return {QEvent::MouseButtonPress, Qt::RightButton};
     case WM_XBUTTONDOWN:
         return {QEvent::MouseButtonPress, extraButton(msg.wParam)};
     case WM_XBUTTONUP:
         return {QEvent::MouseButtonRelease, extraButton(msg.wParam)};
     case WM_XBUTTONDBLCLK:
-        return {QEvent::MouseButtonDblClick, extraButton(msg.wParam)};
+        return {QEvent::MouseButtonPress, extraButton(msg.wParam)};
     case WM_NCMOUSEMOVE:
         return {QEvent::NonClientAreaMouseMove, Qt::NoButton};
     case WM_NCLBUTTONDOWN:
@@ -234,19 +234,19 @@ static inline MouseEvent eventFromMsg(const MSG &msg)
     case WM_NCLBUTTONUP:
         return {QEvent::NonClientAreaMouseButtonRelease, Qt::LeftButton};
     case WM_NCLBUTTONDBLCLK:
-        return {QEvent::NonClientAreaMouseButtonDblClick, Qt::LeftButton};
+        return {QEvent::NonClientAreaMouseButtonPress, Qt::LeftButton};
     case WM_NCMBUTTONDOWN:
         return {QEvent::NonClientAreaMouseButtonPress, Qt::MidButton};
     case WM_NCMBUTTONUP:
         return {QEvent::NonClientAreaMouseButtonRelease, Qt::MidButton};
     case WM_NCMBUTTONDBLCLK:
-        return {QEvent::NonClientAreaMouseButtonDblClick, Qt::MidButton};
+        return {QEvent::NonClientAreaMouseButtonPress, Qt::MidButton};
     case WM_NCRBUTTONDOWN:
         return {QEvent::NonClientAreaMouseButtonPress, Qt::RightButton};
     case WM_NCRBUTTONUP:
         return {QEvent::NonClientAreaMouseButtonRelease, Qt::RightButton};
     case WM_NCRBUTTONDBLCLK:
-        return {QEvent::NonClientAreaMouseButtonDblClick, Qt::RightButton};
+        return {QEvent::NonClientAreaMouseButtonPress, Qt::RightButton};
     default: // WM_MOUSELEAVE
         break;
     }
diff --git a/src/plugins/platforms/windows/qwindowspointerhandler.cpp b/src/plugins/platforms/windows/qwindowspointerhandler.cpp
index 09eadb247a..2b6c696979 100644
--- a/src/plugins/platforms/windows/qwindowspointerhandler.cpp
+++ b/src/plugins/platforms/windows/qwindowspointerhandler.cpp
@@ -280,7 +280,7 @@ bool QWindowsPointerHandler::translatePointerEvent(QWindow *window, HWND hwnd, Q
     return false;
 }
 
-static void getMouseEventInfo(UINT message, POINTER_BUTTON_CHANGE_TYPE changeType, QPoint globalPos, QEvent::Type *eventType, Qt::MouseButton *mouseButton)
+static void getMouseEventInfo(UINT message, POINTER_BUTTON_CHANGE_TYPE changeType, QEvent::Type *eventType, Qt::MouseButton *mouseButton)
 {
     static const QHash<POINTER_BUTTON_CHANGE_TYPE, Qt::MouseButton> buttonMapping {
         {POINTER_CHANGE_FIRSTBUTTON_DOWN, Qt::LeftButton},
@@ -334,28 +334,6 @@ static void getMouseEventInfo(UINT message, POINTER_BUTTON_CHANGE_TYPE changeTyp
     }
 
     *mouseButton = buttonMapping.value(changeType, Qt::NoButton);
-
-    // Pointer messages lack a double click indicator. Check if this is the case here.
-    if (*eventType == QEvent::MouseButtonPress ||
-        *eventType == QEvent::NonClientAreaMouseButtonPress) {
-        static LONG lastTime = 0;
-        static Qt::MouseButton lastButton = Qt::NoButton;
-        static QEvent::Type lastEvent = QEvent::None;
-        static QPoint lastPos;
-        LONG messageTime = GetMessageTime();
-        if (*mouseButton == lastButton
-            && *eventType == lastEvent
-            && messageTime - lastTime < (LONG)GetDoubleClickTime()
-            && qAbs(globalPos.x() - lastPos.x()) < GetSystemMetrics(SM_CXDOUBLECLK)
-            && qAbs(globalPos.y() - lastPos.y()) < GetSystemMetrics(SM_CYDOUBLECLK)) {
-            *eventType = nonClient ? QEvent::NonClientAreaMouseButtonDblClick :
-                                     QEvent::MouseButtonDblClick;
-        }
-        lastTime = messageTime;
-        lastButton = *mouseButton;
-        lastEvent = *eventType;
-        lastPos = globalPos;
-    }
 }
 
 static QWindow *getWindowUnderPointer(QWindow *window, QPoint globalPos)
@@ -467,7 +445,7 @@ bool QWindowsPointerHandler::translateMouseTouchPadEvent(QWindow *window, HWND h
 
         QEvent::Type eventType;
         Qt::MouseButton button;
-        getMouseEventInfo(msg.message, pointerInfo->ButtonChangeType, globalPos, &eventType, &button);
+        getMouseEventInfo(msg.message, pointerInfo->ButtonChangeType, &eventType, &button);
 
         if (et & QtWindows::NonClientEventFlag) {
             QWindowSystemInterface::handleFrameStrutMouseEvent(window, localPos, globalPos, mouseButtons, button, eventType,
@@ -506,6 +484,9 @@ bool QWindowsPointerHandler::translateMouseTouchPadEvent(QWindow *window, HWND h
     case WM_POINTERHWHEEL:
     case WM_POINTERWHEEL: {
 
+        if (!isValidWheelReceiver(window))
+            return true;
+
         int delta = GET_WHEEL_DELTA_WPARAM(msg.wParam);
 
         // Qt horizontal wheel rotation orientation is opposite to the one in WM_POINTERHWHEEL
@@ -515,8 +496,7 @@ bool QWindowsPointerHandler::translateMouseTouchPadEvent(QWindow *window, HWND h
         const QPoint angleDelta = (msg.message == WM_POINTERHWHEEL || (keyModifiers & Qt::AltModifier)) ?
                     QPoint(delta, 0) : QPoint(0, delta);
 
-        if (isValidWheelReceiver(window))
-            QWindowSystemInterface::handleWheelEvent(window, localPos, globalPos, QPoint(), angleDelta, keyModifiers);
+        QWindowSystemInterface::handleWheelEvent(window, localPos, globalPos, QPoint(), angleDelta, keyModifiers);
         return true;
     }
     case WM_POINTERLEAVE:
@@ -530,7 +510,6 @@ bool QWindowsPointerHandler::translateTouchEvent(QWindow *window, HWND hwnd,
                                                  MSG msg, PVOID vTouchInfo, quint32 count)
 {
     Q_UNUSED(hwnd);
-    Q_UNUSED(et);
 
     if (et & QtWindows::NonClientEventFlag)
         return false; // Let DefWindowProc() handle Non Client messages.
@@ -729,21 +708,46 @@ bool QWindowsPointerHandler::translatePenEvent(QWindow *window, HWND hwnd, QtWin
 // Process old-style mouse messages here.
 bool QWindowsPointerHandler::translateMouseEvent(QWindow *window, HWND hwnd, QtWindows::WindowsEventType et, MSG msg, LRESULT *result)
 {
-    Q_UNUSED(et);
-
     // Generate enqueued events.
     flushTouchEvents(m_touchDevice);
     flushTabletEvents();
 
     *result = 0;
-    if (msg.message != WM_MOUSELEAVE && msg.message != WM_MOUSEMOVE)
+    if (et != QtWindows::MouseWheelEvent && msg.message != WM_MOUSELEAVE && msg.message != WM_MOUSEMOVE)
         return false;
 
-    const QPoint localPos(GET_X_LPARAM(msg.lParam), GET_Y_LPARAM(msg.lParam));
-    const QPoint globalPos = QWindowsGeometryHint::mapToGlobal(hwnd, localPos);
+    const QPoint eventPos(GET_X_LPARAM(msg.lParam), GET_Y_LPARAM(msg.lParam));
+    QPoint localPos;
+    QPoint globalPos;
+    if ((et == QtWindows::MouseWheelEvent) || (et & QtWindows::NonClientEventFlag)) {
+        globalPos = eventPos;
+        localPos = QWindowsGeometryHint::mapFromGlobal(hwnd, eventPos);
+    } else {
+        localPos = eventPos;
+        globalPos = QWindowsGeometryHint::mapToGlobal(hwnd, eventPos);
+    }
 
+    const Qt::KeyboardModifiers keyModifiers = QWindowsKeyMapper::queryKeyboardModifiers();
     QWindowsWindow *platformWindow = static_cast<QWindowsWindow *>(window->handle());
 
+    if (et == QtWindows::MouseWheelEvent) {
+
+        if (!isValidWheelReceiver(window))
+            return true;
+
+        int delta = GET_WHEEL_DELTA_WPARAM(msg.wParam);
+
+        // Qt horizontal wheel rotation orientation is opposite to the one in WM_MOUSEHWHEEL
+        if (msg.message == WM_MOUSEHWHEEL)
+            delta = -delta;
+
+        const QPoint angleDelta = (msg.message == WM_MOUSEHWHEEL || (keyModifiers & Qt::AltModifier)) ?
+                    QPoint(delta, 0) : QPoint(0, delta);
+
+        QWindowSystemInterface::handleWheelEvent(window, localPos, globalPos, QPoint(), angleDelta, keyModifiers);
+        return true;
+    }
+
     if (msg.message == WM_MOUSELEAVE) {
         if (window == m_currentWindow) {
             QWindowSystemInterface::handleLeaveEvent(window);
@@ -784,7 +788,6 @@ bool QWindowsPointerHandler::translateMouseEvent(QWindow *window, HWND hwnd, QtW
         m_windowUnderPointer = currentWindowUnderPointer;
     }
 
-    const Qt::KeyboardModifiers keyModifiers = QWindowsKeyMapper::queryKeyboardModifiers();
     const Qt::MouseButtons mouseButtons = queryMouseButtons();
 
     if (!discardEvent)
diff --git a/src/plugins/platforms/xcb/qxcbconnection.cpp b/src/plugins/platforms/xcb/qxcbconnection.cpp
index 9e857ea2ff..45f096a13a 100644
--- a/src/plugins/platforms/xcb/qxcbconnection.cpp
+++ b/src/plugins/platforms/xcb/qxcbconnection.cpp
@@ -105,6 +105,9 @@ QXcbConnection::QXcbConnection(QXcbNativeInterface *nativeInterface, bool canGra
 
     m_xdgCurrentDesktop = qgetenv("XDG_CURRENT_DESKTOP").toLower();
 
+    if (hasXRandr())
+        xrandrSelectEvents();
+
     initializeScreens();
 
 #if QT_CONFIG(xcb_xinput)
diff --git a/src/plugins/platforms/xcb/qxcbconnection.h b/src/plugins/platforms/xcb/qxcbconnection.h
index 49e79ec3fd..5d53b97d37 100644
--- a/src/plugins/platforms/xcb/qxcbconnection.h
+++ b/src/plugins/platforms/xcb/qxcbconnection.h
@@ -250,7 +250,7 @@ protected:
     bool event(QEvent *e) override;
 
 private:
-    void selectXRandrEvents();
+    void xrandrSelectEvents();
     QXcbScreen* findScreenForCrtc(xcb_window_t rootWindow, xcb_randr_crtc_t crtc) const;
     QXcbScreen* findScreenForOutput(xcb_window_t rootWindow, xcb_randr_output_t output) const;
     QXcbVirtualDesktop* virtualDesktopForRootWindow(xcb_window_t rootWindow) const;
diff --git a/src/plugins/platforms/xcb/qxcbconnection_basic.cpp b/src/plugins/platforms/xcb/qxcbconnection_basic.cpp
index 7bed3c8937..b8335d1240 100644
--- a/src/plugins/platforms/xcb/qxcbconnection_basic.cpp
+++ b/src/plugins/platforms/xcb/qxcbconnection_basic.cpp
@@ -308,7 +308,7 @@ void QXcbBasicConnection::initializeXRandr()
         return;
     }
 
-    m_hasXRender = true;
+    m_hasXRandr = true;
     m_xrenderVersion.first = xrenderQuery->major_version;
     m_xrenderVersion.second = xrenderQuery->minor_version;
 #endif
@@ -358,7 +358,7 @@ void QXcbBasicConnection::initializeXRender()
         return;
     }
 
-    m_hasXRandr = true;
+    m_hasXRender = true;
     m_xrandrFirstEvent = reply->first_event;
 }
 
diff --git a/src/plugins/platforms/xcb/qxcbconnection_screens.cpp b/src/plugins/platforms/xcb/qxcbconnection_screens.cpp
index 4c380bf39f..fe9e0be86d 100644
--- a/src/plugins/platforms/xcb/qxcbconnection_screens.cpp
+++ b/src/plugins/platforms/xcb/qxcbconnection_screens.cpp
@@ -46,7 +46,7 @@
 
 #include <xcb/xinerama.h>
 
-void QXcbConnection::selectXRandrEvents()
+void QXcbConnection::xrandrSelectEvents()
 {
     xcb_screen_iterator_t rootIter = xcb_setup_roots_iterator(setup());
     for (; rootIter.rem; xcb_screen_next(&rootIter)) {
@@ -270,8 +270,6 @@ void QXcbConnection::destroyScreen(QXcbScreen *screen)
 
 void QXcbConnection::initializeScreens()
 {
-    selectXRandrEvents();
-
     xcb_screen_iterator_t it = xcb_setup_roots_iterator(setup());
     int xcbScreenNumber = 0;    // screen number in the xcb sense
     QXcbScreen *primaryScreen = nullptr;
@@ -284,7 +282,7 @@ void QXcbConnection::initializeScreens()
         QXcbVirtualDesktop *virtualDesktop = new QXcbVirtualDesktop(this, xcbScreen, xcbScreenNumber);
         m_virtualDesktops.append(virtualDesktop);
         QList<QPlatformScreen *> siblings;
-        if (hasXRender()) {
+        if (hasXRandr()) {
             // RRGetScreenResourcesCurrent is fast but it may return nothing if the
             // configuration is not initialized wrt to the hardware. We should call
             // RRGetScreenResources in this case.
diff --git a/src/printsupport/kernel/qprinter.cpp b/src/printsupport/kernel/qprinter.cpp
index ed4292ff3d..829a13863b 100644
--- a/src/printsupport/kernel/qprinter.cpp
+++ b/src/printsupport/kernel/qprinter.cpp
@@ -149,7 +149,12 @@ void QPrinterPrivate::initEngines(QPrinter::OutputFormat format, const QPrinterI
         printEngine = ps->createNativePrintEngine(printerMode, printerName);
         paintEngine = ps->createPaintEngine(printEngine, printerMode);
     } else {
-        const auto pdfEngineVersion = (pdfVersion == QPrinter::PdfVersion_1_4 ? QPdfEngine::Version_1_4 : QPdfEngine::Version_A1b);
+        static const QHash<QPrinter::PdfVersion, QPdfEngine::PdfVersion> engineMapping {
+            {QPrinter::PdfVersion_1_4, QPdfEngine::Version_1_4},
+            {QPrinter::PdfVersion_A1b, QPdfEngine::Version_A1b},
+            {QPrinter::PdfVersion_1_6, QPdfEngine::Version_1_6}
+        };
+        const auto pdfEngineVersion = engineMapping.value(pdfVersion, QPdfEngine::Version_1_4);
         QPdfPrintEngine *pdfEngine = new QPdfPrintEngine(printerMode, pdfEngineVersion);
         paintEngine = pdfEngine;
         printEngine = pdfEngine;
diff --git a/tests/auto/corelib/global/qtendian/tst_qtendian.cpp b/tests/auto/corelib/global/qtendian/tst_qtendian.cpp
index 7043969c2f..2345bb39c1 100644
--- a/tests/auto/corelib/global/qtendian/tst_qtendian.cpp
+++ b/tests/auto/corelib/global/qtendian/tst_qtendian.cpp
@@ -64,6 +64,9 @@ struct TestData
     quint16 data16;
     quint8 data8;
 
+    float dataFloat;
+    double dataDouble;
+
     quint8 reserved;
 };
 
@@ -72,6 +75,7 @@ template <> quint8 getData(const TestData &d) { return d.data8; }
 template <> quint16 getData(const TestData &d) { return d.data16; }
 template <> quint32 getData(const TestData &d) { return d.data32; }
 template <> quint64 getData(const TestData &d) { return d.data64; }
+template <> float getData(const TestData &d) { return d.dataFloat; }
 
 union RawTestData
 {
@@ -79,9 +83,39 @@ union RawTestData
     TestData data;
 };
 
-static const TestData inNativeEndian = { Q_UINT64_C(0x0123456789abcdef), 0x00c0ffee, 0xcafe, 0xcf, '\0' };
-static const RawTestData inBigEndian = { "\x01\x23\x45\x67\x89\xab\xcd\xef" "\x00\xc0\xff\xee" "\xca\xfe" "\xcf" };
-static const RawTestData inLittleEndian = { "\xef\xcd\xab\x89\x67\x45\x23\x01" "\xee\xff\xc0\x00" "\xfe\xca" "\xcf" };
+template <typename Float>
+Float int2Float(typename QIntegerForSizeof<Float>::Unsigned i)
+{
+    Float result = 0;
+    memcpy(reinterpret_cast<char *>(&result), reinterpret_cast<const char *>(&i), sizeof (Float));
+    return result;
+}
+
+static const TestData inNativeEndian = {
+    Q_UINT64_C(0x0123456789abcdef),
+    0x00c0ffee,
+    0xcafe,
+    0xcf,
+    int2Float<float>(0x00c0ffeeU),
+    int2Float<double>(Q_UINT64_C(0x0123456789abcdef)),
+    '\0'
+};
+static const RawTestData inBigEndian = {
+    "\x01\x23\x45\x67\x89\xab\xcd\xef"
+    "\x00\xc0\xff\xee"
+    "\xca\xfe"
+    "\xcf"
+    "\x00\xc0\xff\xee"
+    "\x01\x23\x45\x67\x89\xab\xcd\xef"
+};
+static const RawTestData inLittleEndian = {
+    "\xef\xcd\xab\x89\x67\x45\x23\x01"
+    "\xee\xff\xc0\x00"
+    "\xfe\xca"
+    "\xcf"
+    "\xee\xff\xc0\x00"
+    "\xef\xcd\xab\x89\x67\x45\x23\x01"
+};
 
 #define EXPAND_ENDIAN_TEST(endian)          \
     do {                                    \
diff --git a/tests/auto/corelib/io/qiodevice/tst_qiodevice.cpp b/tests/auto/corelib/io/qiodevice/tst_qiodevice.cpp
index fed05698fd..da5327594c 100644
--- a/tests/auto/corelib/io/qiodevice/tst_qiodevice.cpp
+++ b/tests/auto/corelib/io/qiodevice/tst_qiodevice.cpp
@@ -209,9 +209,6 @@ void tst_QIODevice::read_QByteArray()
 //--------------------------------------------------------------------
 void tst_QIODevice::unget()
 {
-#if defined(Q_OS_MAC)
-    QSKIP("The unget network test is unstable on Mac. See QTBUG-39983.");
-#endif
     QBuffer buffer;
     buffer.open(QBuffer::ReadWrite);
     buffer.write("ZXCV");
diff --git a/tests/auto/corelib/kernel/qeventdispatcher/BLACKLIST b/tests/auto/corelib/kernel/qeventdispatcher/BLACKLIST
index fb7e025b7c..b1590a5ccf 100644
--- a/tests/auto/corelib/kernel/qeventdispatcher/BLACKLIST
+++ b/tests/auto/corelib/kernel/qeventdispatcher/BLACKLIST
@@ -1,7 +1,5 @@
 [sendPostedEvents]
 windows
-osx
 [registerTimer]
 windows
-osx
 winrt
diff --git a/tests/auto/network/socket/qlocalsocket/tst_qlocalsocket.cpp b/tests/auto/network/socket/qlocalsocket/tst_qlocalsocket.cpp
index 779d55a77a..45ab275510 100644
--- a/tests/auto/network/socket/qlocalsocket/tst_qlocalsocket.cpp
+++ b/tests/auto/network/socket/qlocalsocket/tst_qlocalsocket.cpp
@@ -962,9 +962,6 @@ void tst_QLocalSocket::processConnection()
 #if !QT_CONFIG(process)
     QSKIP("No qprocess support", SkipAll);
 #else
-#ifdef Q_OS_MAC
-    QSKIP("The processConnection test is unstable on Mac. See QTBUG-39986.");
-#endif
 
 #ifdef Q_OS_WIN
     const QString exeSuffix = QStringLiteral(".exe");
diff --git a/tests/auto/widgets/dialogs/qfilesystemmodel/tst_qfilesystemmodel.cpp b/tests/auto/widgets/dialogs/qfilesystemmodel/tst_qfilesystemmodel.cpp
index d8a680881a..9ee5292fcb 100644
--- a/tests/auto/widgets/dialogs/qfilesystemmodel/tst_qfilesystemmodel.cpp
+++ b/tests/auto/widgets/dialogs/qfilesystemmodel/tst_qfilesystemmodel.cpp
@@ -51,10 +51,15 @@
 
 // Will try to wait for the condition while allowing event processing
 // for a maximum of 5 seconds.
-#define TRY_WAIT(expr) \
+#define TRY_WAIT(expr, timedOut) \
     do { \
+        *timedOut = true; \
         const int step = 50; \
-        for (int __i = 0; __i < 5000 && !(expr); __i+=step) { \
+        for (int __i = 0; __i < 5000; __i += step) { \
+            if (expr) { \
+                *timedOut = false; \
+                break; \
+            } \
             QTest::qWait(step); \
         } \
     } while(0)
@@ -123,6 +128,8 @@ private slots:
 
 protected:
     bool createFiles(const QString &test_path, const QStringList &initial_files, int existingFileCount = 0, const QStringList &intial_dirs = QStringList());
+    QModelIndex prepareTestModelRoot(const QString &test_path, QSignalSpy **spy2 = nullptr,
+                                     QSignalSpy **spy3 = nullptr);
 
 private:
     QFileSystemModel *model;
@@ -306,7 +313,11 @@ void tst_QFileSystemModel::iconProvider()
 bool tst_QFileSystemModel::createFiles(const QString &test_path, const QStringList &initial_files, int existingFileCount, const QStringList &initial_dirs)
 {
     //qDebug() << (model->rowCount(model->index(test_path))) << existingFileCount << initial_files;
-    TRY_WAIT((model->rowCount(model->index(test_path)) == existingFileCount));
+    bool timedOut = false;
+    TRY_WAIT((model->rowCount(model->index(test_path)) == existingFileCount), &timedOut);
+    if (timedOut)
+        return false;
+
     for (int i = 0; i < initial_dirs.count(); ++i) {
         QDir dir(test_path);
         if (!dir.exists()) {
@@ -363,23 +374,45 @@ bool tst_QFileSystemModel::createFiles(const QString &test_path, const QStringLi
     return true;
 }
 
-void tst_QFileSystemModel::rowCount()
+QModelIndex tst_QFileSystemModel::prepareTestModelRoot(const QString &test_path, QSignalSpy **spy2,
+                                                       QSignalSpy **spy3)
 {
-    QString tmp = flatDirTestPath;
-    QVERIFY(createFiles(tmp, QStringList()));
+    if (model->rowCount(model->index(test_path)) != 0)
+        return QModelIndex();
 
-    QSignalSpy spy2(model, SIGNAL(rowsInserted(QModelIndex,int,int)));
-    QSignalSpy spy3(model, SIGNAL(rowsAboutToBeInserted(QModelIndex,int,int)));
+    if (spy2)
+        *spy2 = new QSignalSpy(model, &QFileSystemModel::rowsInserted);
+    if (spy3)
+        *spy3 = new QSignalSpy(model, &QFileSystemModel::rowsAboutToBeInserted);
 
-    QStringList files = QStringList() <<  "b" << "d" << "f" << "h" << "j" << ".a" << ".c" << ".e" << ".g";
+    QStringList files = { "b", "d", "f", "h", "j", ".a", ".c", ".e", ".g" };
     QString l = "b,d,f,h,j,.a,.c,.e,.g";
 
-    QVERIFY(createFiles(tmp, files));
+    if (!createFiles(test_path, files))
+        return QModelIndex();
 
-    QModelIndex root = model->setRootPath(tmp);
-    QTRY_COMPARE(model->rowCount(root), 5);
-    QVERIFY(spy2.count() > 0);
-    QVERIFY(spy3.count() > 0);
+    QModelIndex root = model->setRootPath(test_path);
+    if (!root.isValid())
+        return QModelIndex();
+
+    bool timedOut = false;
+    TRY_WAIT(model->rowCount(root) == 5, &timedOut);
+    if (timedOut)
+        return QModelIndex();
+
+    return root;
+}
+
+void tst_QFileSystemModel::rowCount()
+{
+    const QString tmp = flatDirTestPath;
+    QSignalSpy *spy2 = nullptr;
+    QSignalSpy *spy3 = nullptr;
+    QModelIndex root = prepareTestModelRoot(flatDirTestPath, &spy2, &spy3);
+    QVERIFY(root.isValid());
+
+    QVERIFY(spy2 && spy2->count() > 0);
+    QVERIFY(spy3 && spy3->count() > 0);
 }
 
 void tst_QFileSystemModel::rowsInserted_data()
@@ -401,9 +434,9 @@ static inline QString lastEntry(const QModelIndex &root)
 
 void tst_QFileSystemModel::rowsInserted()
 {
-    QString tmp = flatDirTestPath;
-    rowCount();
-    QModelIndex root = model->index(model->rootPath());
+    const QString tmp = flatDirTestPath;
+    QModelIndex root = prepareTestModelRoot(tmp);
+    QVERIFY(root.isValid());
 
     QFETCH(int, ascending);
     QFETCH(int, count);
@@ -454,9 +487,9 @@ void tst_QFileSystemModel::rowsRemoved_data()
 
 void tst_QFileSystemModel::rowsRemoved()
 {
-    QString tmp = flatDirTestPath;
-    rowCount();
-    QModelIndex root = model->index(model->rootPath());
+    const QString tmp = flatDirTestPath;
+    QModelIndex root = prepareTestModelRoot(tmp);
+    QVERIFY(root.isValid());
 
     QFETCH(int, count);
     QFETCH(int, ascending);
@@ -509,9 +542,9 @@ void tst_QFileSystemModel::dataChanged()
 {
     QSKIP("This can't be tested right now since we don't watch files, only directories.");
 
-    QString tmp = flatDirTestPath;
-    rowCount();
-    QModelIndex root = model->index(model->rootPath());
+    const QString tmp = flatDirTestPath;
+    QModelIndex root = prepareTestModelRoot(tmp);
+    QVERIFY(root.isValid());
 
     QFETCH(int, count);
     QFETCH(int, assending);