Merge branch '4.7' of scm.dev.nokia.troll.no:qt/oslo-staging-2 into 4.7-integration

* '4.7' of scm.dev.nokia.troll.no:qt/oslo-staging-2: (23 commits)
  Rename QLocale::isWrittenRightToLeft() to textDirection()
  Fixed some bugs in detection of keyboard directionality
  Add a isWrittenRightToLeft() method to QLocale.
  consistent handling of directionality in QTextLayout
  For an empty line edit the cursor position is depending on input language
  correctly initialize the bidi level in the text engine
  Use the textDirection() of blocks correctly.
  Add QTextBlock::textDirection()
  Make sure LayoutDirectionAuto is the default text direction
  LayoutDirectionAuto is the default layout direction for QPainter
  Correct BiDi behavior of QLineEdit
  The default text direction for QTextOption is Qt::LayoutDirectionAuto
  Handle setting the layoutDirection to Qt::LayoutDirectionAuto
  Introduce LayoutDirection Qt::LayoutDirectionAuto
  Fix QString::isRightToLeft() to conform with Unicode Bidi algorithm
  small optimisation
  QVarLenghtArray: Add typedefs for stl compatibility.
  prefer QElapsedTimer over QTime
  Allow to build Qt in static with mingw
  Protected call to glXChooseFBConfig with appropriate defines.
  ...

40 files changed, 464 insertions, 258 deletions

diff --git a/src/corelib/global/qnamespace.h b/src/corelib/global/qnamespace.h
index a9c56f6..a12e121 100644
--- a/src/corelib/global/qnamespace.h
+++ b/src/corelib/global/qnamespace.h
@@ -1561,7 +1561,8 @@ public:
 
     enum LayoutDirection {
         LeftToRight,
-        RightToLeft
+        RightToLeft,
+        LayoutDirectionAuto
     };
 
     enum AnchorPoint {
diff --git a/src/corelib/global/qnamespace.qdoc b/src/corelib/global/qnamespace.qdoc
index 7eae3a5..abbc03e 100644
--- a/src/corelib/global/qnamespace.qdoc
+++ b/src/corelib/global/qnamespace.qdoc
@@ -2572,15 +2572,23 @@
 /*!
     \enum Qt::LayoutDirection
 
-    Specifies the direction of Qt's layouts:
+    Specifies the direction of Qt's layouts and text handling.
 
     \value LeftToRight  Left-to-right layout.
     \value RightToLeft  Right-to-left layout.
+    \value LayoutDirectionAuto   Automatic layout.
 
     Right-to-left layouts are necessary for certain languages,
     notably Arabic and Hebrew.
 
-    \sa QApplication::setLayoutDirection(), QWidget::setLayoutDirection()
+    LayoutDirectionAuto serves two purposes. When used in conjunction with widgets and layouts, it
+    will imply to use the layout direction set on the parent widget or QApplication. This
+    has the same effect as QWidget::unsetLayoutDirection().
+
+    When LayoutDirectoinAuto is used in conjunction with text layouting, it will imply that the text
+    directionality is determined from the content of the string to be layouted.
+
+    \sa QApplication::setLayoutDirection(), QWidget::setLayoutDirection(), QTextOption::setTextDirection(), QString::isRightToLeft()
 */
 
 /*!
diff --git a/src/corelib/kernel/qeventloop.cpp b/src/corelib/kernel/qeventloop.cpp
index 628afa7..c19f718 100644
--- a/src/corelib/kernel/qeventloop.cpp
+++ b/src/corelib/kernel/qeventloop.cpp
@@ -43,7 +43,7 @@
 
 #include "qabstracteventdispatcher.h"
 #include "qcoreapplication.h"
-#include "qdatetime.h"
+#include "qelapsedtimer.h"
 
 #include "qobject_p.h"
 #include <private/qthread_p.h>
@@ -247,7 +247,7 @@ void QEventLoop::processEvents(ProcessEventsFlags flags, int maxTime)
     if (!d->threadData->eventDispatcher)
         return;
 
-    QTime start;
+    QElapsedTimer start;
     start.start();
     if (flags & DeferredDeletion)
         QCoreApplication::sendPostedEvents(0, QEvent::DeferredDelete);
diff --git a/src/corelib/tools/qlocale.cpp b/src/corelib/tools/qlocale.cpp
index c000dc8..a51ee81 100644
--- a/src/corelib/tools/qlocale.cpp
+++ b/src/corelib/tools/qlocale.cpp
@@ -3478,6 +3478,25 @@ QLocale::MeasurementSystem QLocale::measurementSystem() const
 }
 
 /*!
+  \since 4.7
+
+  Returns the text direction of the language.
+*/
+Qt::LayoutDirection QLocale::textDirection() const
+{
+    Language lang = language();
+    if (lang == QLocale::Arabic ||
+        lang == QLocale::Hebrew ||
+        lang == QLocale::Persian ||
+        lang == QLocale::Urdu ||
+        lang == QLocale::Syriac)
+        return Qt::RightToLeft;
+
+    return Qt::LeftToRight;
+}
+
+
+/*!
     \since 4.5
 
     Returns the localized name of the "AM" suffix for times specified using
diff --git a/src/corelib/tools/qlocale.h b/src/corelib/tools/qlocale.h
index f2fd892..8b424bb 100644
--- a/src/corelib/tools/qlocale.h
+++ b/src/corelib/tools/qlocale.h
@@ -666,6 +666,8 @@ public:
 
     MeasurementSystem measurementSystem() const;
 
+    Qt::LayoutDirection textDirection() const;
+
     inline bool operator==(const QLocale &other) const;
     inline bool operator!=(const QLocale &other) const;
 
diff --git a/src/corelib/tools/qstring.cpp b/src/corelib/tools/qstring.cpp
index 1172a7b..1d5fab3 100644
--- a/src/corelib/tools/qstring.cpp
+++ b/src/corelib/tools/qstring.cpp
@@ -6916,20 +6916,23 @@ void QString::updateProperties() const
         p++;
     }
 
-    p = d->data;
-    d->righttoleft = false;
+    d->righttoleft = isRightToLeft();
+    d->clean = true;
+}
+
+bool QString::isRightToLeft() const
+{
+    ushort *p = d->data;
+    const ushort * const end = p + d->size;
+    bool righttoleft = false;
     while (p < end) {
         switch(QChar::direction(*p))
         {
         case QChar::DirL:
-        case QChar::DirLRO:
-        case QChar::DirLRE:
             goto end;
         case QChar::DirR:
         case QChar::DirAL:
-        case QChar::DirRLO:
-        case QChar::DirRLE:
-            d->righttoleft = true;
+            righttoleft = true;
             goto end;
         default:
             break;
@@ -6937,8 +6940,7 @@ void QString::updateProperties() const
         ++p;
     }
  end:
-    d->clean = true;
-    return;
+    return righttoleft;
 }
 
 /*! \fn bool QString::isSimpleText() const
diff --git a/src/corelib/tools/qstring.h b/src/corelib/tools/qstring.h
index a1c4e77..e52f59f 100644
--- a/src/corelib/tools/qstring.h
+++ b/src/corelib/tools/qstring.h
@@ -590,7 +590,7 @@ public:
 #endif
 
     bool isSimpleText() const { if (!d->clean) updateProperties(); return d->simpletext; }
-    bool isRightToLeft() const { if (!d->clean) updateProperties(); return d->righttoleft; }
+    bool isRightToLeft() const;
 
     QString(int size, Qt::Initialization);
 
diff --git a/src/corelib/tools/qvarlengtharray.h b/src/corelib/tools/qvarlengtharray.h
index bfede94..4a6bb4b 100644
--- a/src/corelib/tools/qvarlengtharray.h
+++ b/src/corelib/tools/qvarlengtharray.h
@@ -127,6 +127,13 @@ public:
     inline T *data() { return ptr; }
     inline const T *data() const { return ptr; }
     inline const T * constData() const { return ptr; }
+    typedef int size_type;
+    typedef T value_type;
+    typedef value_type *pointer;
+    typedef const value_type *const_pointer;
+    typedef value_type &reference;
+    typedef const value_type &const_reference;
+    typedef qptrdiff difference_type;
 
 private:
     friend class QPodList<T, Prealloc>;
diff --git a/src/corelib/tools/qvarlengtharray.qdoc b/src/corelib/tools/qvarlengtharray.qdoc
index 38901e5..ef2dc58 100644
--- a/src/corelib/tools/qvarlengtharray.qdoc
+++ b/src/corelib/tools/qvarlengtharray.qdoc
@@ -302,3 +302,52 @@
     \a defaultValue.
 */
 
+/*!
+    \typedef QVarLengthArray::size_type
+    \since 4.7
+
+    Typedef for int. Provided for STL compatibility.
+*/
+
+/*!
+    \typedef QVarLengthArray::value_type
+    \since 4.7
+
+    Typedef for T. Provided for STL compatibility.
+*/
+
+/*!
+    \typedef QVarLengthArray::difference_type
+    \since 4.7
+
+    Typedef for ptrdiff_t. Provided for STL compatibility.
+*/
+
+/*!
+    \typedef QVarLengthArray::pointer
+    \since 4.7
+
+    Typedef for T *. Provided for STL compatibility.
+*/
+
+/*!
+    \typedef QVarLengthArray::const_pointer
+    \since 4.7
+
+    Typedef for const T *. Provided for STL compatibility.
+*/
+
+/*!
+    \typedef QVarLengthArray::reference
+    \since 4.7
+
+    Typedef for T &. Provided for STL compatibility.
+*/
+
+/*!
+    \typedef QVarLengthArray::const_reference
+    \since 4.7
+
+    Typedef for const T &. Provided for STL compatibility.
+*/
+
diff --git a/src/declarative/graphicsitems/qdeclarativetextinput.cpp b/src/declarative/graphicsitems/qdeclarativetextinput.cpp
index 1202101..8d320f4 100644
--- a/src/declarative/graphicsitems/qdeclarativetextinput.cpp
+++ b/src/declarative/graphicsitems/qdeclarativetextinput.cpp
@@ -1356,7 +1356,6 @@ void QDeclarativeTextInputPrivate::init()
     Q_Q(QDeclarativeTextInput);
     control->setCursorWidth(1);
     control->setPasswordCharacter(QLatin1Char('*'));
-    control->setLayoutDirection(Qt::LeftToRight);
     q->setSmooth(smooth);
     q->setAcceptedMouseButtons(Qt::LeftButton);
     q->setFlag(QGraphicsItem::ItemHasNoContents, false);
diff --git a/src/declarative/qml/parser/qdeclarativejslexer.cpp b/src/declarative/qml/parser/qdeclarativejslexer.cpp
index 975ad4c..fcaaece 100644
--- a/src/declarative/qml/parser/qdeclarativejslexer.cpp
+++ b/src/declarative/qml/parser/qdeclarativejslexer.cpp
@@ -57,7 +57,7 @@
 #include <string.h>
 
 QT_BEGIN_NAMESPACE
-Q_DECL_IMPORT extern double qstrtod(const char *s00, char const **se, bool *ok);
+Q_CORE_EXPORT double qstrtod(const char *s00, char const **se, bool *ok);
 QT_END_NAMESPACE
 
 QT_QML_BEGIN_NAMESPACE
diff --git a/src/declarative/qml/qdeclarativeimport.cpp b/src/declarative/qml/qdeclarativeimport.cpp
index c658a31..a2e3831 100644
--- a/src/declarative/qml/qdeclarativeimport.cpp
+++ b/src/declarative/qml/qdeclarativeimport.cpp
@@ -823,7 +823,7 @@ void QDeclarativeImportDatabase::addPluginPath(const QString& path)
         qDebug() << "QDeclarativeImportDatabase::addPluginPath" << path;
 
     QUrl url = QUrl(path);
-    if (url.isRelative() || url.scheme() == QString::fromLocal8Bit("file")) {
+    if (url.isRelative() || url.scheme() == QLatin1String("file")) {
         QDir dir = QDir(path);
         filePluginPath.prepend(dir.canonicalPath());
     } else {
@@ -842,7 +842,7 @@ void QDeclarativeImportDatabase::addImportPath(const QString& path)
     QUrl url = QUrl(path);
     QString cPath;
 
-    if (url.isRelative() || url.scheme() == QString::fromLocal8Bit("file")) {
+    if (url.isRelative() || url.scheme() == QLatin1String("file")) {
         QDir dir = QDir(path);
         cPath = dir.canonicalPath();
     } else {
diff --git a/src/gui/inputmethod/qximinputcontext_x11.cpp b/src/gui/inputmethod/qximinputcontext_x11.cpp
index d048b36..ed5aa23 100644
--- a/src/gui/inputmethod/qximinputcontext_x11.cpp
+++ b/src/gui/inputmethod/qximinputcontext_x11.cpp
@@ -346,10 +346,7 @@ static XFontSet getFontSet(const QFont &f)
 
 extern bool qt_use_rtl_extensions; // from qapplication_x11.cpp
 #ifndef QT_NO_XKB
-extern void q_getLocaleAndDirection(QLocale *locale,
-                                  Qt::LayoutDirection *direction,
-                                  const QByteArray &layoutName,
-                                  const QByteArray &variantName);
+extern QLocale q_getKeyboardLocale(const QByteArray &layoutName, const QByteArray &variantName);
 #endif
 
 QXIMInputContext::QXIMInputContext()
@@ -407,17 +404,12 @@ QXIMInputContext::QXIMInputContext()
             QList<QByteArray> layoutNames = QByteArray::fromRawData(names[2], qstrlen(names[2])).split(',');
             QList<QByteArray> variantNames = QByteArray::fromRawData(names[3], qstrlen(names[3])).split(',');
             for (int i = 0; i < qMin(layoutNames.count(), variantNames.count()); ++i  ) {
-                QLocale keyboardInputLocale;
-                Qt::LayoutDirection keyboardInputDirection;
                 QByteArray variantName = variantNames.at(i);
                 const int dashPos = variantName.indexOf("-");
                 if (dashPos >= 0)
                     variantName.truncate(dashPos);
-                q_getLocaleAndDirection(&keyboardInputLocale,
-                                      &keyboardInputDirection,
-                                      layoutNames.at(i),
-                                      variantName);
-                if (keyboardInputDirection == Qt::RightToLeft)
+                QLocale keyboardInputLocale = q_getKeyboardLocale(layoutNames.at(i), variantName);
+                if (keyboardInputLocale.textDirection() == Qt::RightToLeft)
                     qt_use_rtl_extensions = true;
             }
         }
diff --git a/src/gui/kernel/qapplication.cpp b/src/gui/kernel/qapplication.cpp
index c9a3e8b..52767b8 100644
--- a/src/gui/kernel/qapplication.cpp
+++ b/src/gui/kernel/qapplication.cpp
@@ -146,7 +146,7 @@ static void initResources()
 
 QT_BEGIN_NAMESPACE
 
-Q_DECL_IMPORT extern void qt_call_post_routines();
+Q_CORE_EXPORT void qt_call_post_routines();
 
 int QApplicationPrivate::app_compile_version = 0x040000; //we don't know exactly, but it's at least 4.0.0
 
@@ -3544,7 +3544,7 @@ int QApplication::startDragDistance()
 
 void QApplication::setLayoutDirection(Qt::LayoutDirection direction)
 {
-    if (layout_direction == direction)
+    if (layout_direction == direction || direction == Qt::LayoutDirectionAuto)
         return;
 
     layout_direction = direction;
diff --git a/src/gui/kernel/qkeymapper_mac.cpp b/src/gui/kernel/qkeymapper_mac.cpp
index a7145d4..873b8f9 100644
--- a/src/gui/kernel/qkeymapper_mac.cpp
+++ b/src/gui/kernel/qkeymapper_mac.cpp
@@ -672,23 +672,7 @@ QKeyMapperPrivate::updateKeyboard()
 #endif
     if (iso639Code) {
         keyboardInputLocale = QLocale(QCFString::toQString(iso639Code));
-        QString monday = keyboardInputLocale.dayName(1);
-        bool rtl = false;
-        for (int i = 0; i < monday.length(); ++i) {
-            switch (monday.at(i).direction()) {
-            default:
-                break;
-            case QChar::DirR:
-            case QChar::DirAL:
-            case QChar::DirRLE:
-            case QChar::DirRLO:
-                rtl = true;
-                break;
-            }
-            if (rtl)
-                break;
-        }
-        keyboardInputDirection = rtl ? Qt::RightToLeft : Qt::LeftToRight;
+        keyboardInputDirection = keyboardInputLocale.textDirection();
     } else {
         keyboardInputLocale = QLocale::c();
         keyboardInputDirection = Qt::LeftToRight;
diff --git a/src/gui/kernel/qkeymapper_qws.cpp b/src/gui/kernel/qkeymapper_qws.cpp
index 5b6b1c4..63bb46b 100644
--- a/src/gui/kernel/qkeymapper_qws.cpp
+++ b/src/gui/kernel/qkeymapper_qws.cpp
@@ -52,7 +52,7 @@ QT_USE_NAMESPACE
 QKeyMapperPrivate::QKeyMapperPrivate()
 {
     keyboardInputLocale = QLocale::system();
-    keyboardInputDirection = Qt::RightToLeft;
+    keyboardInputDirection = keyboardInputLocale.textDirection();
 }
 
 QKeyMapperPrivate::~QKeyMapperPrivate()
diff --git a/src/gui/kernel/qkeymapper_x11.cpp b/src/gui/kernel/qkeymapper_x11.cpp
index 807959c..825edbc 100644
--- a/src/gui/kernel/qkeymapper_x11.cpp
+++ b/src/gui/kernel/qkeymapper_x11.cpp
@@ -80,22 +80,15 @@ QT_BEGIN_NAMESPACE
       (((KeySym)(keysym) >= 0x11000000) && ((KeySym)(keysym) <= 0x1100FFFF))
 #endif
 
-void q_getLocaleAndDirection(QLocale *locale,
-                                  Qt::LayoutDirection *direction,
-                                  const QByteArray &layoutName,
-                                  const QByteArray &variantName)
+QLocale q_getKeyboardLocale(const QByteArray &layoutName, const QByteArray &variantName)
 {
     int i = 0;
     while (xkbLayoutData[i].layout != 0) {
-        if (layoutName == xkbLayoutData[i].layout && variantName == xkbLayoutData[i].variant) {
-            *locale = QLocale(xkbLayoutData[i].language, xkbLayoutData[i].country);
-            *direction = xkbLayoutData[i].direction;
-            return;
-        }
+        if (layoutName == xkbLayoutData[i].layout && variantName == xkbLayoutData[i].variant)
+            return QLocale(xkbLayoutData[i].language, xkbLayoutData[i].country);
         ++i;
     }
-    *locale = QLocale::c();
-    *direction = Qt::LeftToRight;
+    return QLocale::c();
 }
 #endif // QT_NO_XKB
 
@@ -523,10 +516,8 @@ void QKeyMapperPrivate::clearMappings()
         // if (keyboardLayoutName.isEmpty())
         //     qWarning("Qt: unable to determine keyboard layout, please talk to qt-bugs@trolltech.com"); ?
 
-        q_getLocaleAndDirection(&keyboardInputLocale,
-                              &keyboardInputDirection,
-                              layoutName,
-                              variantName);
+        keyboardInputLocale = q_getKeyboardLocale(layoutName, variantName);
+        keyboardInputDirection = keyboardInputLocale.textDirection();
 
 #if 0
         qDebug() << "keyboard input locale ="
diff --git a/src/gui/kernel/qkeymapper_x11_p.cpp b/src/gui/kernel/qkeymapper_x11_p.cpp
index 20fcc86..6308973 100644
--- a/src/gui/kernel/qkeymapper_x11_p.cpp
+++ b/src/gui/kernel/qkeymapper_x11_p.cpp
@@ -271,13 +271,13 @@ static struct {
     // name = is:nodeadkeys, description = Iceland
     { "is", "nodeadkeys", Qt::LeftToRight, QLocale::Icelandic, QLocale::Iceland },
     // name = il, description = Israel
-    { "il", "", Qt::LeftToRight, QLocale::Hebrew, QLocale::Israel },
+    { "il", "", Qt::RightToLeft, QLocale::Hebrew, QLocale::Israel },
     // name = il:lyx, description = Israel
-    { "il", "lyx", Qt::LeftToRight, QLocale::Hebrew, QLocale::Israel },
+    { "il", "lyx", Qt::RightToLeft, QLocale::Hebrew, QLocale::Israel },
     // name = il:si1452, description = Israel
-    { "il", "si1452", Qt::LeftToRight, QLocale::Hebrew, QLocale::Israel },
+    { "il", "si1452", Qt::RightToLeft, QLocale::Hebrew, QLocale::Israel },
     // name = il:phonetic, description = Israel
-    { "il", "phonetic", Qt::LeftToRight, QLocale::Hebrew, QLocale::Israel },
+    { "il", "phonetic", Qt::RightToLeft, QLocale::Hebrew, QLocale::Israel },
     // name = it, description = Italy
     { "it", "", Qt::LeftToRight, QLocale::Italian, QLocale::Italy },
     // name = it:nodeadkeys, description = Italy
@@ -419,11 +419,11 @@ static struct {
     // name = ch:fr_sundeadkeys, description = Switzerland
     { "ch", "fr_sundeadkeys", Qt::LeftToRight, QLocale::French, QLocale::Switzerland },
     // name = sy, description = Syria
-    { "sy", "", Qt::RightToLeft, QLocale::Arabic, QLocale::SyrianArabRepublic },
+    { "sy", "", Qt::RightToLeft, QLocale::Syriac, QLocale::SyrianArabRepublic },
     // name = sy:syc, description = Syria
-    { "sy", "syc", Qt::RightToLeft, QLocale::Arabic, QLocale::SyrianArabRepublic },
+    { "sy", "syc", Qt::RightToLeft, QLocale::Syriac, QLocale::SyrianArabRepublic },
     // name = sy:syc_phonetic, description = Syria
-    { "sy", "syc_phonetic", Qt::RightToLeft, QLocale::Arabic, QLocale::SyrianArabRepublic },
+    { "sy", "syc_phonetic", Qt::RightToLeft, QLocale::Syriac, QLocale::SyrianArabRepublic },
     // name = tj, description = Tajikistan
     { "tj", "", Qt::LeftToRight, QLocale::Tajik, QLocale::Tajikistan },
     // name = lk, description = Sri Lanka
diff --git a/src/gui/kernel/qwhatsthis.cpp b/src/gui/kernel/qwhatsthis.cpp
index 6181b62..ff4641e 100644
--- a/src/gui/kernel/qwhatsthis.cpp
+++ b/src/gui/kernel/qwhatsthis.cpp
@@ -143,7 +143,7 @@ QT_BEGIN_NAMESPACE
     \sa QToolTip
 */
 
-Q_DECL_IMPORT extern void qDeleteInEventHandler(QObject *o);
+Q_CORE_EXPORT void qDeleteInEventHandler(QObject *o);
 
 class QWhatsThat : public QWidget
 {
diff --git a/src/gui/kernel/qwidget.cpp b/src/gui/kernel/qwidget.cpp
index 895c85d..ab84a54 100644
--- a/src/gui/kernel/qwidget.cpp
+++ b/src/gui/kernel/qwidget.cpp
@@ -4828,6 +4828,11 @@ void QWidget::setLayoutDirection(Qt::LayoutDirection direction)
 {
     Q_D(QWidget);
 
+    if (direction == Qt::LayoutDirectionAuto) {
+        unsetLayoutDirection();
+        return;
+    }
+
     setAttribute(Qt::WA_SetLayoutDirection);
     d->setLayoutDirection_helper(direction);
 }
diff --git a/src/gui/painting/qpainter.cpp b/src/gui/painting/qpainter.cpp
index 97f754d..e8c4599 100644
--- a/src/gui/painting/qpainter.cpp
+++ b/src/gui/painting/qpainter.cpp
@@ -1564,7 +1564,6 @@ void QPainter::initFrom(const QWidget *widget)
         d->engine->setDirty(QPaintEngine::DirtyBrush);
         d->engine->setDirty(QPaintEngine::DirtyFont);
     }
-    d->state->layoutDirection = widget->layoutDirection();
 }
 
 
@@ -1874,7 +1873,7 @@ bool QPainter::begin(QPaintDevice *pd)
         QWidget *widget = static_cast<QWidget *>(d->original_device);
         initFrom(widget);
     } else {
-        d->state->layoutDirection = QApplication::layoutDirection();
+        d->state->layoutDirection = Qt::LayoutDirectionAuto;
         // make sure we have a font compatible with the paintdevice
         d->state->deviceFont = d->state->font = QFont(d->state->deviceFont, device());
     }
@@ -8056,7 +8055,10 @@ start_lengthVariant:
     Sets the layout direction used by the painter when drawing text,
     to the specified \a direction.
 
-    \sa layoutDirection(), drawText(), {QPainter#Settings}{Settings}
+    The default is Qt::LayoutDirectionAuto, which will implicitly determine the
+    direction from the text drawn.
+
+    \sa QTextOption::setTextDirection(), layoutDirection(), drawText(), {QPainter#Settings}{Settings}
 */
 void QPainter::setLayoutDirection(Qt::LayoutDirection direction)
 {
@@ -8068,12 +8070,12 @@ void QPainter::setLayoutDirection(Qt::LayoutDirection direction)
 /*!
     Returns the layout direction used by the painter when drawing text.
 
-    \sa setLayoutDirection(), drawText(), {QPainter#Settings}{Settings}
+    \sa QTextOption::textDirection(), setLayoutDirection(), drawText(), {QPainter#Settings}{Settings}
 */
 Qt::LayoutDirection QPainter::layoutDirection() const
 {
     Q_D(const QPainter);
-    return d->state ? d->state->layoutDirection : Qt::LeftToRight;
+    return d->state ? d->state->layoutDirection : Qt::LayoutDirectionAuto;
 }
 
 QPainterState::QPainterState(const QPainterState *s)
diff --git a/src/gui/painting/qtransform.cpp b/src/gui/painting/qtransform.cpp
index 423cce9..47b7758 100644
--- a/src/gui/painting/qtransform.cpp
+++ b/src/gui/painting/qtransform.cpp
@@ -1626,7 +1626,7 @@ static QPainterPath mapProjective(const QTransform &transform, const QPainterPat
 QPainterPath QTransform::map(const QPainterPath &path) const
 {
     TransformationType t = inline_type();
-    if (t == TxNone || path.isEmpty())
+    if (t == TxNone || path.elementCount() == 0)
         return path;
 
     if (t >= TxProject)
diff --git a/src/gui/text/qtextcursor.cpp b/src/gui/text/qtextcursor.cpp
index d6ac3aa..23849bc 100644
--- a/src/gui/text/qtextcursor.cpp
+++ b/src/gui/text/qtextcursor.cpp
@@ -362,7 +362,7 @@ bool QTextCursorPrivate::movePosition(QTextCursor::MoveOperation op, QTextCursor
     QTextBlock blockIt = block();
 
     if (op >= QTextCursor::Left && op <= QTextCursor::WordRight
-        && blockIt.blockFormat().layoutDirection() == Qt::RightToLeft) {
+        && blockIt.textDirection() == Qt::RightToLeft) {
         if (op == QTextCursor::Left)
             op = QTextCursor::NextCharacter;
         else if (op == QTextCursor::Right)
diff --git a/src/gui/text/qtextdocument.cpp b/src/gui/text/qtextdocument.cpp
index c7a9756..48aee8f 100644
--- a/src/gui/text/qtextdocument.cpp
+++ b/src/gui/text/qtextdocument.cpp
@@ -2496,13 +2496,10 @@ void QTextHtmlExporter::emitBlockAttributes(const QTextBlock &block)
     QTextBlockFormat format = block.blockFormat();
     emitAlignment(format.alignment());
 
-    Qt::LayoutDirection dir = format.layoutDirection();
-    if (dir == Qt::LeftToRight) {
-        // assume default to not bloat the html too much
-        // html += QLatin1String(" dir='ltr'");
-    } else {
+    // assume default to not bloat the html too much
+    // html += QLatin1String(" dir='ltr'");
+    if (block.textDirection() == Qt::RightToLeft)
         html += QLatin1String(" dir='rtl'");
-    }
 
     QLatin1String style(" style=\"");
     html += style;
diff --git a/src/gui/text/qtextdocumentlayout.cpp b/src/gui/text/qtextdocumentlayout.cpp
index eeb66ce..ff14490 100644
--- a/src/gui/text/qtextdocumentlayout.cpp
+++ b/src/gui/text/qtextdocumentlayout.cpp
@@ -1369,9 +1369,7 @@ void QTextDocumentLayoutPrivate::drawListItem(const QPointF &offset, QPainter *p
     QTextLine firstLine = layout->lineAt(0);
     Q_ASSERT(firstLine.isValid());
     QPointF pos = (offset + layout->position()).toPoint();
-    Qt::LayoutDirection dir = docPrivate->defaultTextOption.textDirection();
-    if (blockFormat.hasProperty(QTextFormat::LayoutDirection))
-        dir = blockFormat.layoutDirection();
+    Qt::LayoutDirection dir = bl.textDirection();
     {
         QRectF textRect = firstLine.naturalTextRect();
         pos += textRect.topLeft().toPoint();
@@ -2530,9 +2528,7 @@ void QTextDocumentLayoutPrivate::layoutBlock(const QTextBlock &bl, int blockPosi
 
     //QTextFrameData *fd = data(layoutStruct->frame);
 
-    Qt::LayoutDirection dir = docPrivate->defaultTextOption.textDirection();
-    if (blockFormat.hasProperty(QTextFormat::LayoutDirection))
-        dir = blockFormat.layoutDirection();
+    Qt::LayoutDirection dir = bl.textDirection();
 
     QFixed extraMargin;
     if (docPrivate->defaultTextOption.flags() & QTextOption::AddSpaceForLineAndParagraphSeparators) {
diff --git a/src/gui/text/qtextengine.cpp b/src/gui/text/qtextengine.cpp
index 3486264..ac1fffd 100644
--- a/src/gui/text/qtextengine.cpp
+++ b/src/gui/text/qtextengine.cpp
@@ -1404,7 +1404,10 @@ void QTextEngine::itemize() const
 #else
     bool ignore = ignoreBidi;
 #endif
-    if (!ignore && option.textDirection() == Qt::LeftToRight) {
+
+    bool rtl = isRightToLeft();
+
+    if (!ignore && !rtl) {
         ignore = true;
         const QChar *start = layoutData->string.unicode();
         const QChar * const end = start + length;
@@ -1420,7 +1423,7 @@ void QTextEngine::itemize() const
     QVarLengthArray<QScriptAnalysis, 4096> scriptAnalysis(length);
     QScriptAnalysis *analysis = scriptAnalysis.data();
 
-    QBidiControl control(option.textDirection() == Qt::RightToLeft);
+    QBidiControl control(rtl);
 
     if (ignore) {
         memset(analysis, 0, length*sizeof(QScriptAnalysis));
@@ -1515,6 +1518,23 @@ void QTextEngine::itemize() const
     resolveAdditionalFormats();
 }
 
+bool QTextEngine::isRightToLeft() const
+{
+    switch (option.textDirection()) {
+    case Qt::LeftToRight:
+        return false;
+    case Qt::RightToLeft:
+        return true;
+    default:
+        break;
+    }
+    // this places the cursor in the right position depending on the keyboard layout
+    if (layoutData->string.isEmpty())
+        return QApplication::keyboardInputDirection() == Qt::RightToLeft;
+    return layoutData->string.isRightToLeft();
+}
+
+
 int QTextEngine::findItem(int strPos) const
 {
     itemize();
@@ -2511,7 +2531,7 @@ QFixed QTextEngine::calculateTabWidth(int item, QFixed x) const
 
     QList<QTextOption::Tab> tabArray = option.tabs();
     if (!tabArray.isEmpty()) {
-        if (option.textDirection() == Qt::RightToLeft) { // rebase the tabArray positions.
+        if (isRightToLeft()) { // rebase the tabArray positions.
             QList<QTextOption::Tab> newTabs;
             QList<QTextOption::Tab>::Iterator iter = tabArray.begin();
             while(iter != tabArray.end()) {
diff --git a/src/gui/text/qtextengine_p.h b/src/gui/text/qtextengine_p.h
index 00b1392..908a0ec 100644
--- a/src/gui/text/qtextengine_p.h
+++ b/src/gui/text/qtextengine_p.h
@@ -458,6 +458,7 @@ public:
     void validate() const;
     void itemize() const;
 
+    bool isRightToLeft() const;
     static void bidiReorder(int numRuns, const quint8 *levels, int *visualOrder);
 
     const HB_CharAttributes *attributes() const;
diff --git a/src/gui/text/qtextformat.cpp b/src/gui/text/qtextformat.cpp
index 140cf43..46db253 100644
--- a/src/gui/text/qtextformat.cpp
+++ b/src/gui/text/qtextformat.cpp
@@ -900,11 +900,14 @@ bool QTextFormat::boolProperty(int propertyId) const
 */
 int QTextFormat::intProperty(int propertyId) const
 {
+    // required, since the default layout direction has to be LayoutDirectionAuto, which is not integer 0
+    int def = (propertyId == QTextFormat::LayoutDirection) ? int(Qt::LayoutDirectionAuto) : 0;
+
     if (!d)
-        return 0;
+        return def;
     const QVariant prop = d->property(propertyId);
     if (prop.userType() != QVariant::Int)
-        return 0;
+        return def;
     return prop.toInt();
 }
 
diff --git a/src/gui/text/qtextlayout.cpp b/src/gui/text/qtextlayout.cpp
index f5e252c..ddf9411 100644
--- a/src/gui/text/qtextlayout.cpp
+++ b/src/gui/text/qtextlayout.cpp
@@ -69,7 +69,7 @@ static inline QFixed leadingSpaceWidth(QTextEngine *eng, const QScriptLine &line
     if (!line.hasTrailingSpaces
         || (eng->option.flags() & QTextOption::IncludeTrailingSpaces)
         || !(eng->option.alignment() & Qt::AlignRight)
-        || (eng->option.textDirection() != Qt::RightToLeft))
+        || !eng->isRightToLeft())
         return QFixed();
 
     int pos = line.length;
@@ -86,7 +86,7 @@ static QFixed alignLine(QTextEngine *eng, const QScriptLine &line)
     // if width is QFIXED_MAX that means we used setNumColumns() and that implicitly makes this line left aligned.
     if (!line.justified && line.width != QFIXED_MAX) {
         int align = eng->option.alignment();
-        if (align & Qt::AlignJustify && eng->option.textDirection() == Qt::RightToLeft)
+        if (align & Qt::AlignJustify && eng->isRightToLeft())
             align = Qt::AlignRight;
         if (align & Qt::AlignRight)
             x = line.width - (line.textAdvance + leadingSpaceWidth(eng, line));
@@ -1337,7 +1337,7 @@ void QTextLayout::drawCursor(QPainter *p, const QPointF &pos, int cursorPosition
     int itm = d->findItem(cursorPosition - 1);
     QFixed base = sl.base();
     QFixed descent = sl.descent;
-    bool rightToLeft = (d->option.textDirection() == Qt::RightToLeft);
+    bool rightToLeft = d->isRightToLeft();
     if (itm >= 0) {
         const QScriptItem &si = d->layoutData->items.at(itm);
         if (si.ascent > 0)
diff --git a/src/gui/text/qtextlist.cpp b/src/gui/text/qtextlist.cpp
index 2986ee7..a0ff520 100644
--- a/src/gui/text/qtextlist.cpp
+++ b/src/gui/text/qtextlist.cpp
@@ -262,7 +262,7 @@ QString QTextList::itemText(const QTextBlock &blockIt) const
         default:
             Q_ASSERT(false);
     }
-    if (blockFormat.layoutDirection() == Qt::RightToLeft)
+    if (blockIt.textDirection() == Qt::RightToLeft)
         return result.prepend(QLatin1Char('.'));
     return result + QLatin1Char('.');
 }
diff --git a/src/gui/text/qtextobject.cpp b/src/gui/text/qtextobject.cpp
index 088eb98..f386871 100644
--- a/src/gui/text/qtextobject.cpp
+++ b/src/gui/text/qtextobject.cpp
@@ -1140,6 +1140,49 @@ int QTextBlock::charFormatIndex() const
 }
 
 /*!
+  \since 4.7
+
+  Returns the resolved text direction.
+
+  If the block has no explicit direction set, it will resolve the
+  direction from the blocks content. Returns either Qt::LeftToRight
+  or Qt::RightToLeft.
+
+  \sa QTextBlock::layoutDirection(), QString::isRightToLeft(), Qt::LayoutDirection
+*/
+Qt::LayoutDirection QTextBlock::textDirection() const
+{
+    Qt::LayoutDirection dir = blockFormat().layoutDirection();
+    if (dir != Qt::LayoutDirectionAuto)
+        return dir;
+
+    const QString buffer = p->buffer();
+
+    const int pos = position();
+    QTextDocumentPrivate::FragmentIterator it = p->find(pos);
+    QTextDocumentPrivate::FragmentIterator end = p->find(pos + length() - 1); // -1 to omit the block separator char
+    for (; it != end; ++it) {
+        const QTextFragmentData * const frag = it.value();
+        const QChar *p = buffer.constData() + frag->stringPosition;
+        const QChar * const end = p + frag->size_array[0];
+        while (p < end) {
+            switch(QChar::direction(p->unicode()))
+            {
+            case QChar::DirL:
+                return Qt::LeftToRight;
+            case QChar::DirR:
+            case QChar::DirAL:
+                return Qt::RightToLeft;
+            default:
+                break;
+            }
+            ++p;
+        }
+    }
+    return Qt::LeftToRight;
+}
+
+/*!
     Returns the block's contents as plain text.
 
     \sa length() charFormat() blockFormat()
diff --git a/src/gui/text/qtextobject.h b/src/gui/text/qtextobject.h
index 67f67d8..a573a26 100644
--- a/src/gui/text/qtextobject.h
+++ b/src/gui/text/qtextobject.h
@@ -221,6 +221,8 @@ public:
     QTextCharFormat charFormat() const;
     int charFormatIndex() const;
 
+    Qt::LayoutDirection textDirection() const;
+
     QString text() const;
 
     const QTextDocument *document() const;
diff --git a/src/gui/text/qtextoption.cpp b/src/gui/text/qtextoption.cpp
index c1e254c..3b02ebe 100644
--- a/src/gui/text/qtextoption.cpp
+++ b/src/gui/text/qtextoption.cpp
@@ -65,7 +65,7 @@ QTextOption::QTextOption()
       tab(-1),
       d(0)
 {
-    direction = QApplication::layoutDirection();
+    direction = Qt::LayoutDirectionAuto;
 }
 
 /*!
diff --git a/src/gui/text/qtextoption.h b/src/gui/text/qtextoption.h
index 1381ed1..fa8c6f2 100644
--- a/src/gui/text/qtextoption.h
+++ b/src/gui/text/qtextoption.h
@@ -134,8 +134,8 @@ private:
     uint align : 8;
     uint wordWrap : 4;
     uint design : 1;
-    uint direction : 1;
-    uint unused : 19;
+    uint direction : 2;
+    uint unused : 18;
     uint f;
     qreal tab;
     QTextOptionPrivate *d;
diff --git a/src/gui/widgets/qlinecontrol_p.h b/src/gui/widgets/qlinecontrol_p.h
index 5da1831..7068f62 100644
--- a/src/gui/widgets/qlinecontrol_p.h
+++ b/src/gui/widgets/qlinecontrol_p.h
@@ -78,7 +78,7 @@ class Q_GUI_EXPORT QLineControl : public QObject
 
 public:
     QLineControl(const QString &txt = QString())
-        : m_cursor(0), m_preeditCursor(0), m_cursorWidth(0), m_layoutDirection(Qt::LeftToRight),
+        : m_cursor(0), m_preeditCursor(0), m_cursorWidth(0), m_layoutDirection(Qt::LayoutDirectionAuto),
         m_hideCursor(false), m_separator(0), m_readOnly(0),
         m_dragEnabled(0), m_echoMode(0), m_textDirty(0), m_selDirty(0),
         m_validInput(1), m_blinkStatus(0), m_blinkPeriod(0), m_blinkTimer(0), m_deleteAllTimer(0),
@@ -272,7 +272,14 @@ public:
     QChar passwordCharacter() const { return m_passwordCharacter; }
     void setPasswordCharacter(const QChar &character) { m_passwordCharacter = character; updateDisplayText(); }
 
-    Qt::LayoutDirection layoutDirection() const { return m_layoutDirection; }
+    Qt::LayoutDirection layoutDirection() const {
+        if (m_layoutDirection == Qt::LayoutDirectionAuto) {
+            if (m_text.isEmpty())
+                return QApplication::keyboardInputDirection();
+            return m_text.isRightToLeft() ? Qt::RightToLeft : Qt::LeftToRight;
+        }
+        return m_layoutDirection;
+    }
     void setLayoutDirection(Qt::LayoutDirection direction)
     {
         if (direction != m_layoutDirection) {
diff --git a/src/gui/widgets/qlineedit.cpp b/src/gui/widgets/qlineedit.cpp
index c1c4abf..1bffde1 100644
--- a/src/gui/widgets/qlineedit.cpp
+++ b/src/gui/widgets/qlineedit.cpp
@@ -1860,7 +1860,7 @@ void QLineEdit::paintEvent(QPaintEvent *)
     p.setClipRect(r);
 
     QFontMetrics fm = fontMetrics();
-    Qt::Alignment va = QStyle::visualAlignment(layoutDirection(), QFlag(d->alignment));
+    Qt::Alignment va = QStyle::visualAlignment(d->control->layoutDirection(), QFlag(d->alignment));
     switch (va & Qt::AlignVertical_Mask) {
      case Qt::AlignBottom:
          d->vscroll = r.y() + r.height() - fm.height() - d->verticalMargin;
@@ -2161,9 +2161,6 @@ void QLineEdit::changeEvent(QEvent *ev)
         }
         update();
         break;
-    case QEvent::LayoutDirectionChange:
-        d->control->setLayoutDirection(layoutDirection());
-        break;
     default:
         break;
     }
diff --git a/src/opengl/qgl_x11.cpp b/src/opengl/qgl_x11.cpp
index 9491f14..3e71a48 100644
--- a/src/opengl/qgl_x11.cpp
+++ b/src/opengl/qgl_x11.cpp
@@ -115,6 +115,20 @@ extern const QX11Info *qt_x11Info(const QPaintDevice *pd);
 #define GLX_FRONT_LEFT_EXT                 0x20DE
 #endif
 
+#ifndef GLX_ARB_create_context
+#define GLX_CONTEXT_DEBUG_BIT_ARB          0x00000001
+#define GLX_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB 0x00000002
+#define GLX_CONTEXT_MAJOR_VERSION_ARB      0x2091
+#define GLX_CONTEXT_MINOR_VERSION_ARB      0x2092
+#define GLX_CONTEXT_FLAGS_ARB              0x2094
+#endif
+
+#ifndef GLX_ARB_create_context_profile
+#define GLX_CONTEXT_CORE_PROFILE_BIT_ARB   0x00000001
+#define GLX_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB 0x00000002
+#define GLX_CONTEXT_PROFILE_MASK_ARB       0x9126
+#endif
+
 /*
   The qt_gl_choose_cmap function is internal and used by QGLWidget::setContext()
   and GLX (not Windows).  If the application can't find any sharable
@@ -401,6 +415,148 @@ bool QGLFormat::hasOpenGLOverlays()
     return trans_colors.size() > 0;
 }
 
+static bool buildSpec(int* spec, const QGLFormat& f, QPaintDevice* paintDevice,
+                      int bufDepth, bool onlyFBConfig = false)
+{
+    int i = 0;
+    spec[i++] = GLX_LEVEL;
+    spec[i++] = f.plane();
+    const QX11Info *xinfo = qt_x11Info(paintDevice);
+    bool useFBConfig = onlyFBConfig;
+
+#if defined(GLX_VERSION_1_3) && !defined(QT_NO_XRENDER) && !defined(Q_OS_HPUX)
+    /*
+      HPUX defines GLX_VERSION_1_3 but does not implement the corresponding functions.
+      Specifically glXChooseFBConfig and glXGetVisualFromFBConfig are not implemented.
+     */
+    QWidget* widget = 0;
+    if (paintDevice->devType() == QInternal::Widget)
+        widget = static_cast<QWidget*>(paintDevice);
+
+    // Only use glXChooseFBConfig for widgets if we're trying to get an ARGB visual
+    if (widget && widget->testAttribute(Qt::WA_TranslucentBackground) && X11->use_xrender)
+        useFBConfig = true;
+#endif
+
+#if defined(GLX_VERSION_1_1) && defined(GLX_EXT_visual_info)
+    static bool useTranspExt = false;
+    static bool useTranspExtChecked = false;
+    if (f.plane() && !useTranspExtChecked && paintDevice) {
+        QGLExtensionMatcher extensions(glXQueryExtensionsString(xinfo->display(), xinfo->screen()));
+        useTranspExt = extensions.match("GLX_EXT_visual_info");
+        //# (A bit simplistic; that could theoretically be a substring)
+        if (useTranspExt) {
+            QByteArray cstr(glXGetClientString(xinfo->display(), GLX_VENDOR));
+            useTranspExt = !cstr.contains("Xi Graphics"); // bug workaround
+            if (useTranspExt) {
+                // bug workaround - some systems (eg. FireGL) refuses to return an overlay
+                // visual if the GLX_TRANSPARENT_TYPE_EXT attribute is specified, even if
+                // the implementation supports transparent overlays
+                int tmpSpec[] = { GLX_LEVEL, f.plane(), GLX_TRANSPARENT_TYPE_EXT,
+                                  f.rgba() ? GLX_TRANSPARENT_RGB_EXT : GLX_TRANSPARENT_INDEX_EXT,
+                                  XNone };
+                XVisualInfo * vinf = glXChooseVisual(xinfo->display(), xinfo->screen(), tmpSpec);
+                if (!vinf) {
+                    useTranspExt = false;
+                }
+            }
+        }
+
+        useTranspExtChecked = true;
+    }
+    if (f.plane() && useTranspExt && !useFBConfig) {
+        // Required to avoid non-transparent overlay visual(!) on some systems
+        spec[i++] = GLX_TRANSPARENT_TYPE_EXT;
+        spec[i++] = f.rgba() ? GLX_TRANSPARENT_RGB_EXT : GLX_TRANSPARENT_INDEX_EXT;
+    }
+#endif
+
+#if defined(GLX_VERSION_1_3)  && !defined(Q_OS_HPUX)
+    // GLX_RENDER_TYPE is only in glx >=1.3
+    if (useFBConfig) {
+        spec[i++] = GLX_RENDER_TYPE;
+        spec[i++] = f.rgba() ? GLX_RGBA_BIT : GLX_COLOR_INDEX_BIT;
+    }
+#endif
+
+    if (f.doubleBuffer())
+        spec[i++] = GLX_DOUBLEBUFFER;
+        if (useFBConfig)
+            spec[i++] = True;
+    if (f.depth()) {
+        spec[i++] = GLX_DEPTH_SIZE;
+        spec[i++] = f.depthBufferSize() == -1 ? 1 : f.depthBufferSize();
+    }
+    if (f.stereo()) {
+        spec[i++] = GLX_STEREO;
+        if (useFBConfig)
+            spec[i++] = True;
+    }
+    if (f.stencil()) {
+        spec[i++] = GLX_STENCIL_SIZE;
+        spec[i++] = f.stencilBufferSize() == -1 ? 1 : f.stencilBufferSize();
+    }
+    if (f.rgba()) {
+        if (!useFBConfig)
+            spec[i++] = GLX_RGBA;
+        spec[i++] = GLX_RED_SIZE;
+        spec[i++] = f.redBufferSize() == -1 ? 1 : f.redBufferSize();
+        spec[i++] = GLX_GREEN_SIZE;
+        spec[i++] = f.greenBufferSize() == -1 ? 1 : f.greenBufferSize();
+        spec[i++] = GLX_BLUE_SIZE;
+        spec[i++] = f.blueBufferSize() == -1 ? 1 : f.blueBufferSize();
+        if (f.alpha()) {
+            spec[i++] = GLX_ALPHA_SIZE;
+            spec[i++] = f.alphaBufferSize() == -1 ? 1 : f.alphaBufferSize();
+        }
+        if (f.accum()) {
+            spec[i++] = GLX_ACCUM_RED_SIZE;
+            spec[i++] = f.accumBufferSize() == -1 ? 1 : f.accumBufferSize();
+            spec[i++] = GLX_ACCUM_GREEN_SIZE;
+            spec[i++] = f.accumBufferSize() == -1 ? 1 : f.accumBufferSize();
+            spec[i++] = GLX_ACCUM_BLUE_SIZE;
+            spec[i++] = f.accumBufferSize() == -1 ? 1 : f.accumBufferSize();
+            if (f.alpha()) {
+                spec[i++] = GLX_ACCUM_ALPHA_SIZE;
+                spec[i++] = f.accumBufferSize() == -1 ? 1 : f.accumBufferSize();
+            }
+        }
+    } else {
+        spec[i++] = GLX_BUFFER_SIZE;
+        spec[i++] = bufDepth;
+    }
+
+    if (f.sampleBuffers()) {
+        spec[i++] = GLX_SAMPLE_BUFFERS_ARB;
+        spec[i++] = 1;
+        spec[i++] = GLX_SAMPLES_ARB;
+        spec[i++] = f.samples() == -1 ? 4 : f.samples();
+    }
+
+#if defined(GLX_VERSION_1_3) && !defined(Q_OS_HPUX)
+    if (useFBConfig) {
+        spec[i++] = GLX_DRAWABLE_TYPE;
+        switch(paintDevice->devType()) {
+        case QInternal::Pixmap:
+            spec[i++] = GLX_PIXMAP_BIT;
+            break;
+        case QInternal::Pbuffer:
+            spec[i++] = GLX_PBUFFER_BIT;
+            break;
+        default:
+            qWarning("QGLContext: Unknown paint device type %d", paintDevice->devType());
+            // Fall-through & assume it's a window
+        case QInternal::Widget:
+            spec[i++] = GLX_WINDOW_BIT;
+            break;
+        };
+    }
+#endif
+
+    spec[i] = XNone;
+    return useFBConfig;
+}
+
 /*****************************************************************************
   QGLContext UNIX/GLX-specific code
  *****************************************************************************/
@@ -493,21 +649,81 @@ bool QGLContext::chooseContext(const QGLContext* shareContext)
         shareContext = 0;
     }
 
+    const int major = d->reqFormat.majorVersion();
+    const int minor = d->reqFormat.minorVersion();
+    const int profile = d->reqFormat.profile() == QGLFormat::CompatibilityProfile
+        ? GLX_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB
+        : GLX_CONTEXT_CORE_PROFILE_BIT_ARB;
+
     d->cx = 0;
-    if (shareContext) {
+
+#if defined(GLX_VERSION_1_3) && !defined(Q_OS_HPUX)
+    /*
+      HPUX defines GLX_VERSION_1_3 but does not implement the corresponding functions.
+      Specifically glXChooseFBConfig and glXGetVisualFromFBConfig are not implemented.
+     */
+    if ((major == 3 && minor >= 2) || major > 3) {
+        QGLTemporaryContext *tmpContext = 0;
+        if (!QGLContext::currentContext())
+            tmpContext = new QGLTemporaryContext;
+
+        int attributes[] = { GLX_CONTEXT_MAJOR_VERSION_ARB, major,
+                             GLX_CONTEXT_MINOR_VERSION_ARB, minor,
+                             GLX_CONTEXT_PROFILE_MASK_ARB, profile,
+                             0 };
+
+        PFNGLXCREATECONTEXTATTRIBSARBPROC glXCreateContextAttribs =
+            (PFNGLXCREATECONTEXTATTRIBSARBPROC) qglx_getProcAddress("glXCreateContextAttribsARB");
+
+        if (glXCreateContextAttribs) {
+            int spec[45];
+            glXGetConfig(disp, (XVisualInfo*)d->vi, GLX_BUFFER_SIZE, &res);
+            buildSpec(spec, format(), d->paintDevice, res, true);
+
+            GLXFBConfig *configs;
+            int configCount = 0;
+            configs = glXChooseFBConfig(disp, xinfo->screen(), spec, &configCount);
+
+            if (configs && configCount > 0) {
+                d->cx = glXCreateContextAttribs(disp, configs[0],
+                    shareContext ? (GLXContext)shareContext->d_func()->cx : 0, direct, attributes);
+                if (!d->cx && shareContext) {
+                    shareContext = 0;
+                    d->cx = glXCreateContextAttribs(disp, configs[0], 0, direct, attributes);
+                }
+                d->screen = ((XVisualInfo*)d->vi)->screen;
+            }
+            XFree(configs);
+        } else {
+            qWarning("QGLContext::chooseContext(): OpenGL %d.%d is not supported", major, minor);
+        }
+
+        if (tmpContext)
+            delete tmpContext;
+    }
+#else
+    Q_UNUSED(major);
+    Q_UNUSED(minor);
+    Q_UNUSED(profile);
+#endif
+
+    if (!d->cx && shareContext) {
         d->cx = glXCreateContext(disp, (XVisualInfo *)d->vi,
                                (GLXContext)shareContext->d_func()->cx, direct);
         d->screen = ((XVisualInfo*)d->vi)->screen;
-        if (d->cx) {
-            QGLContext *share = const_cast<QGLContext *>(shareContext);
-            d->sharing = true;
-            share->d_func()->sharing = true;
-        }
     }
     if (!d->cx) {
         d->cx = glXCreateContext(disp, (XVisualInfo *)d->vi, NULL, direct);
         d->screen = ((XVisualInfo*)d->vi)->screen;
+        shareContext = 0;
+    }
+
+    if (shareContext && d->cx) {
+        QGLContext *share = const_cast<QGLContext *>(shareContext);
+        d->sharing = true;
+        share->d_func()->sharing = true;
     }
+
     if (!d->cx)
         return false;
     d->glFormat.setDirectRendering(glXIsDirect(disp, (GLXContext)d->cx));
@@ -606,143 +822,8 @@ void *QGLContext::tryVisual(const QGLFormat& f, int bufDepth)
 {
     Q_D(QGLContext);
     int spec[45];
-    int i = 0;
-    spec[i++] = GLX_LEVEL;
-    spec[i++] = f.plane();
     const QX11Info *xinfo = qt_x11Info(d->paintDevice);
-    bool useFBConfig = false;
-
-#if defined(GLX_VERSION_1_3) && !defined(QT_NO_XRENDER) && !defined(Q_OS_HPUX)
-    /*
-      HPUX defines GLX_VERSION_1_3 but does not implement the corresponding functions.
-      Specifically glXChooseFBConfig and glXGetVisualFromFBConfig are not implemented.
-     */
-    QWidget* widget = 0;
-    if (d->paintDevice->devType() == QInternal::Widget)
-        widget = static_cast<QWidget*>(d->paintDevice);
-
-    // Only use glXChooseFBConfig for widgets if we're trying to get an ARGB visual
-    if (widget && widget->testAttribute(Qt::WA_TranslucentBackground) && X11->use_xrender)
-        useFBConfig = true;
-#endif
-
-#if defined(GLX_VERSION_1_1) && defined(GLX_EXT_visual_info)
-    static bool useTranspExt = false;
-    static bool useTranspExtChecked = false;
-    if (f.plane() && !useTranspExtChecked && d->paintDevice) {
-        QGLExtensionMatcher extensions(glXQueryExtensionsString(xinfo->display(), xinfo->screen()));
-        useTranspExt = extensions.match("GLX_EXT_visual_info");
-        //# (A bit simplistic; that could theoretically be a substring)
-        if (useTranspExt) {
-            QByteArray cstr(glXGetClientString(xinfo->display(), GLX_VENDOR));
-            useTranspExt = !cstr.contains("Xi Graphics"); // bug workaround
-            if (useTranspExt) {
-                // bug workaround - some systems (eg. FireGL) refuses to return an overlay
-                // visual if the GLX_TRANSPARENT_TYPE_EXT attribute is specified, even if
-                // the implementation supports transparent overlays
-                int tmpSpec[] = { GLX_LEVEL, f.plane(), GLX_TRANSPARENT_TYPE_EXT,
-                                  f.rgba() ? GLX_TRANSPARENT_RGB_EXT : GLX_TRANSPARENT_INDEX_EXT,
-                                  XNone };
-                XVisualInfo * vinf = glXChooseVisual(xinfo->display(), xinfo->screen(), tmpSpec);
-                if (!vinf) {
-                    useTranspExt = false;
-                }
-            }
-        }
-
-        useTranspExtChecked = true;
-    }
-    if (f.plane() && useTranspExt && !useFBConfig) {
-        // Required to avoid non-transparent overlay visual(!) on some systems
-        spec[i++] = GLX_TRANSPARENT_TYPE_EXT;
-        spec[i++] = f.rgba() ? GLX_TRANSPARENT_RGB_EXT : GLX_TRANSPARENT_INDEX_EXT;
-    }
-#endif
-
-#if defined(GLX_VERSION_1_3)  && !defined(Q_OS_HPUX)
-    // GLX_RENDER_TYPE is only in glx >=1.3
-    if (useFBConfig) {
-        spec[i++] = GLX_RENDER_TYPE;
-        spec[i++] = f.rgba() ? GLX_RGBA_BIT : GLX_COLOR_INDEX_BIT;
-    }
-#endif
-
-    if (f.doubleBuffer())
-        spec[i++] = GLX_DOUBLEBUFFER;
-        if (useFBConfig)
-            spec[i++] = True;
-    if (f.depth()) {
-        spec[i++] = GLX_DEPTH_SIZE;
-        spec[i++] = f.depthBufferSize() == -1 ? 1 : f.depthBufferSize();
-    }
-    if (f.stereo()) {
-        spec[i++] = GLX_STEREO;
-        if (useFBConfig)
-            spec[i++] = True;
-    }
-    if (f.stencil()) {
-        spec[i++] = GLX_STENCIL_SIZE;
-        spec[i++] = f.stencilBufferSize() == -1 ? 1 : f.stencilBufferSize();
-    }
-    if (f.rgba()) {
-        if (!useFBConfig)
-            spec[i++] = GLX_RGBA;
-        spec[i++] = GLX_RED_SIZE;
-        spec[i++] = f.redBufferSize() == -1 ? 1 : f.redBufferSize();
-        spec[i++] = GLX_GREEN_SIZE;
-        spec[i++] = f.greenBufferSize() == -1 ? 1 : f.greenBufferSize();
-        spec[i++] = GLX_BLUE_SIZE;
-        spec[i++] = f.blueBufferSize() == -1 ? 1 : f.blueBufferSize();
-        if (f.alpha()) {
-            spec[i++] = GLX_ALPHA_SIZE;
-            spec[i++] = f.alphaBufferSize() == -1 ? 1 : f.alphaBufferSize();
-        }
-        if (f.accum()) {
-            spec[i++] = GLX_ACCUM_RED_SIZE;
-            spec[i++] = f.accumBufferSize() == -1 ? 1 : f.accumBufferSize();
-            spec[i++] = GLX_ACCUM_GREEN_SIZE;
-            spec[i++] = f.accumBufferSize() == -1 ? 1 : f.accumBufferSize();
-            spec[i++] = GLX_ACCUM_BLUE_SIZE;
-            spec[i++] = f.accumBufferSize() == -1 ? 1 : f.accumBufferSize();
-            if (f.alpha()) {
-                spec[i++] = GLX_ACCUM_ALPHA_SIZE;
-                spec[i++] = f.accumBufferSize() == -1 ? 1 : f.accumBufferSize();
-            }
-        }
-    } else {
-        spec[i++] = GLX_BUFFER_SIZE;
-        spec[i++] = bufDepth;
-    }
-
-    if (f.sampleBuffers()) {
-        spec[i++] = GLX_SAMPLE_BUFFERS_ARB;
-        spec[i++] = 1;
-        spec[i++] = GLX_SAMPLES_ARB;
-        spec[i++] = f.samples() == -1 ? 4 : f.samples();
-    }
-
-#if defined(GLX_VERSION_1_3) && !defined(Q_OS_HPUX)
-    if (useFBConfig) {
-        spec[i++] = GLX_DRAWABLE_TYPE;
-        switch(d->paintDevice->devType()) {
-        case QInternal::Pixmap:
-            spec[i++] = GLX_PIXMAP_BIT;
-            break;
-        case QInternal::Pbuffer:
-            spec[i++] = GLX_PBUFFER_BIT;
-            break;
-        default:
-            qWarning("QGLContext: Unknown paint device type %d", d->paintDevice->devType());
-            // Fall-through & assume it's a window
-        case QInternal::Widget:
-            spec[i++] = GLX_WINDOW_BIT;
-            break;
-        };
-    }
-#endif
-
-    spec[i] = XNone;
-
+    bool useFBConfig = buildSpec(spec, f, d->paintDevice, bufDepth, false);
 
     XVisualInfo* chosenVisualInfo = 0;
 
@@ -755,7 +836,7 @@ void *QGLContext::tryVisual(const QGLFormat& f, int bufDepth)
         if (!configs)
             break; // fallback to trying glXChooseVisual
 
-        for (i = 0; i < configCount; ++i) {
+        for (int i = 0; i < configCount; ++i) {
             XVisualInfo* vi;
             vi = glXGetVisualFromFBConfig(xinfo->display(), configs[i]);
             if (!vi)
diff --git a/src/script/api/qscriptengine.cpp b/src/script/api/qscriptengine.cpp
index 86915bb..f02ea52 100644
--- a/src/script/api/qscriptengine.cpp
+++ b/src/script/api/qscriptengine.cpp
@@ -1525,7 +1525,7 @@ void QScriptEnginePrivate::detachAllRegisteredScriptStrings()
 
 #ifndef QT_NO_REGEXP
 
-Q_DECL_IMPORT extern QString qt_regexp_toCanonical(const QString &, QRegExp::PatternSyntax);
+Q_CORE_EXPORT QString qt_regexp_toCanonical(const QString &, QRegExp::PatternSyntax);
 
 JSC::JSValue QScriptEnginePrivate::newRegExp(JSC::ExecState *exec, const QRegExp &regexp)
 {
@@ -2020,8 +2020,6 @@ QScriptValue QScriptEngine::newFunction(QScriptEngine::FunctionSignature fun,
 
 #ifndef QT_NO_REGEXP
 
-Q_DECL_IMPORT extern QString qt_regexp_toCanonical(const QString &, QRegExp::PatternSyntax);
-
 /*!
   Creates a QtScript object of class RegExp with the given
   \a regexp.
diff --git a/src/script/parser/qscriptlexer.cpp b/src/script/parser/qscriptlexer.cpp
index ca64776..3ddc3aa 100644
--- a/src/script/parser/qscriptlexer.cpp
+++ b/src/script/parser/qscriptlexer.cpp
@@ -31,7 +31,7 @@
 
 QT_BEGIN_NAMESPACE
 
-Q_DECL_IMPORT extern double qstrtod(const char *s00, char const **se, bool *ok);
+Q_CORE_EXPORT double qstrtod(const char *s00, char const **se, bool *ok);
 
 #define shiftWindowsLineBreak() \
     do { \
diff --git a/src/xmlpatterns/data/qdecimal_p.h b/src/xmlpatterns/data/qdecimal_p.h
index d17b647..2a5e0b3 100644
--- a/src/xmlpatterns/data/qdecimal_p.h
+++ b/src/xmlpatterns/data/qdecimal_p.h
@@ -61,7 +61,7 @@ QT_BEGIN_NAMESPACE
 /**
  * Defined in QtCore's qlocale.cpp.
  */
-Q_DECL_IMPORT extern char *qdtoa(double d, int mode, int ndigits, int *decpt, int *sign, char **rve, char **resultp);
+Q_CORE_EXPORT char *qdtoa(double d, int mode, int ndigits, int *decpt, int *sign, char **rve, char **resultp);
 
 namespace QPatternist
 {