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: (24 commits)
  Stabilize tst_QGraphicsWidget::QT_BUG_13865_doublePaintWhenAddingASubItem
  Fixed accessing freed memory in raster engine.
  Build fix for -qtnamespace.
  Fixed parsing of SVGs with absolute font sizes.
  Moving QPdf::stripSpecialCharacter to fontengine
  Revert "Fix (implement!) hfw/wfh in QGridLayoutEngine"
  Fixed a layout issue where you could get NaN as dimensions
  QTextCodec:  Fix valgrind warning when using QTextCodec in destructions functions
  Fix double painting when adding an item into a linear layout
  Fixed antialiased rasterization bug in raster engine.
  Fixed potential crash when loading corrupt GIFs.
  Work around an ATI driver problem with mutli-sampled pbuffers.
  tst_qstatemachine.cpp: fix compilation with Sun Studio
  Fixed regression in clipping.qps autotest on 64-bit.
  Fixed crash when using Qt::WA_DeleteOnClose on a QPrintDialog on Mac.
  Fixed performance regression in curve stroking.
  Don't disable texture_from_pixmap on GLX/X11 by default.
  Avoid creating copy of an image in memory when storing as png
  Doc update for the support of MSVC 2010 64-bit
  fix documentation of drawText(int, int, int, int, ...
  ...

32 files changed, 265 insertions, 494 deletions

diff --git a/src/corelib/codecs/qtextcodec.cpp b/src/corelib/codecs/qtextcodec.cpp
index c9fbec8..83e1f0c 100644
--- a/src/corelib/codecs/qtextcodec.cpp
+++ b/src/corelib/codecs/qtextcodec.cpp
@@ -110,6 +110,10 @@ Q_GLOBAL_STATIC_WITH_ARGS(QFactoryLoader, loader,
     (QTextCodecFactoryInterface_iid, QLatin1String("/codecs")))
 #endif
 
+//Cache for QTextCodec::codecForName and codecForMib.
+typedef QHash<QByteArray, QTextCodec *> QTextCodecCache;
+Q_GLOBAL_STATIC(QTextCodecCache, qTextCodecCache)
+
 
 static char qtolower(register char c)
 { if (c >= 'A' && c <= 'Z') return c + 0x20; return c; }
@@ -181,7 +185,6 @@ static QTextCodec *createForMib(int mib)
 }
 
 static QList<QTextCodec*> *all = 0;
-static int clearCaches = 0;  // flags specifying if caches should be invalided: 0x1 codecForName, 0x2 codecForMib
 #ifdef Q_DEBUG_TEXTCODEC
 static bool destroying_is_ok = false;
 #endif
@@ -1007,7 +1010,9 @@ QTextCodec::~QTextCodec()
         QMutexLocker locker(textCodecsMutex());
 #endif
         all->removeAll(this);
-        clearCaches = 0x1 | 0x2;
+        QTextCodecCache *cache = qTextCodecCache();
+        if (cache)
+            cache->clear();
     }
 }
 
@@ -1037,32 +1042,33 @@ QTextCodec *QTextCodec::codecForName(const QByteArray &name)
     if (!validCodecs())
         return 0;
 
-    static QHash <QByteArray, QTextCodec *> cache;
-    if (clearCaches & 0x1) {
-        cache.clear();
-        clearCaches &= ~0x1;
+    QTextCodecCache *cache = qTextCodecCache();
+    QTextCodec *codec;
+    if (cache) {
+        codec = cache->value(name);
+        if (codec)
+            return codec;
     }
-    QTextCodec *codec = cache.value(name);
-    if (codec)
-        return codec;
 
     for (int i = 0; i < all->size(); ++i) {
         QTextCodec *cursor = all->at(i);
         if (nameMatch(cursor->name(), name)) {
-            cache.insert(name, cursor);
+            if (cache)
+                cache->insert(name, cursor);
             return cursor;
         }
         QList<QByteArray> aliases = cursor->aliases();
         for (int y = 0; y < aliases.size(); ++y)
             if (nameMatch(aliases.at(y), name)) {
-                cache.insert(name, cursor);
+                if (cache)
+                    cache->insert(name, cursor);
                 return cursor;
             }
     }
 
     codec = createForName(name);
-    if (codec)
-        cache.insert(name, codec);
+    if (codec && cache)
+        cache->insert(name, codec);
     return codec;
 }
 
@@ -1081,20 +1087,18 @@ QTextCodec* QTextCodec::codecForMib(int mib)
     if (!validCodecs())
         return 0;
 
-    static QHash <int, QTextCodec *> cache;
-    if (clearCaches & 0x2) {
-        cache.clear();
-        clearCaches &= ~0x2;
-    }
-    QTextCodec *codec = cache.value(mib);
-    if (codec)
-        return codec;
+    QByteArray key = "MIB: " + QByteArray::number(mib);
+    QTextCodecCache *cache = qTextCodecCache();
+    QTextCodec *codec;
+    if (cache)
+        codec = cache->value(key);
 
     QList<QTextCodec*>::ConstIterator i;
     for (int i = 0; i < all->size(); ++i) {
         QTextCodec *cursor = all->at(i);
         if (cursor->mibEnum() == mib) {
-            cache.insert(mib, cursor);
+            if (cache)
+                cache->insert(key, cursor);
             return cursor;
         }
     }
@@ -1106,8 +1110,8 @@ QTextCodec* QTextCodec::codecForMib(int mib)
     if (!codec && mib == 1000)
         return codecForMib(1015);
 
-    if (codec)
-        cache.insert(mib, codec);
+    if (codec && cache)
+        cache->insert(key, codec);
     return codec;
 }
 
diff --git a/src/corelib/plugin/qsystemlibrary.cpp b/src/corelib/plugin/qsystemlibrary.cpp
index eeb142b..1b8d8fe 100644
--- a/src/corelib/plugin/qsystemlibrary.cpp
+++ b/src/corelib/plugin/qsystemlibrary.cpp
@@ -77,6 +77,9 @@
     in the documentation for LoadLibrary for Windows CE at MSDN.
     (http://msdn.microsoft.com/en-us/library/ms886736.aspx)
 */
+
+QT_BEGIN_NAMESPACE
+
 #if defined(Q_OS_WINCE)
 HINSTANCE QSystemLibrary::load(const wchar_t *libraryName, bool onlySystemDirectory /* = true */)
 {
@@ -134,3 +137,5 @@ HINSTANCE QSystemLibrary::load(const wchar_t *libraryName, bool onlySystemDirect
 }
 
 #endif  //Q_OS_WINCE
+
+QT_END_NAMESPACE
diff --git a/src/corelib/plugin/qsystemlibrary_p.h b/src/corelib/plugin/qsystemlibrary_p.h
index 3251a3c..8000a61 100644
--- a/src/corelib/plugin/qsystemlibrary_p.h
+++ b/src/corelib/plugin/qsystemlibrary_p.h
@@ -47,6 +47,8 @@
 #include <qt_windows.h>
 #include <QtCore/qstring.h>
 
+QT_BEGIN_NAMESPACE
+
 class QSystemLibrary
 {
 public:
@@ -101,6 +103,8 @@ private:
     bool m_didLoad;
 };
 
+QT_END_NAMESPACE
+
 #endif  //Q_OS_WIN
 
 #endif  //QSYSTEMLIBRARY_P_H
diff --git a/src/gui/dialogs/qprintdialog_mac.mm b/src/gui/dialogs/qprintdialog_mac.mm
index 84a72db..82e4db5 100644
--- a/src/gui/dialogs/qprintdialog_mac.mm
+++ b/src/gui/dialogs/qprintdialog_mac.mm
@@ -140,11 +140,6 @@ QT_USE_NAMESPACE
 
     QPrintDialogPrivate *d = static_cast<QPrintDialogPrivate *>(contextInfo);
     QPrintDialog *dialog = d->printDialog();
-    // temporary hack to work around bug in deleteLater() in Qt/Mac Cocoa
-#if 1
-    bool deleteDialog = dialog->testAttribute(Qt::WA_DeleteOnClose);
-    dialog->setAttribute(Qt::WA_DeleteOnClose, false);
-#endif
 
     if (returnCode == NSOKButton) {
         UInt32 frompage, topage;
@@ -192,10 +187,6 @@ QT_USE_NAMESPACE
     }
 
     dialog->done((returnCode == NSOKButton) ? QDialog::Accepted : QDialog::Rejected);
-#if 1
-    if (deleteDialog)
-        delete dialog;
-#endif
 }
 @end
 
diff --git a/src/gui/graphicsview/qgraphicslayoutitem.cpp b/src/gui/graphicsview/qgraphicslayoutitem.cpp
index 634f68c..ad4b2b5 100644
--- a/src/gui/graphicsview/qgraphicslayoutitem.cpp
+++ b/src/gui/graphicsview/qgraphicslayoutitem.cpp
@@ -48,7 +48,6 @@
 #include "qgraphicslayoutitem.h"
 #include "qgraphicslayoutitem_p.h"
 #include "qwidget.h"
-#include "qgraphicswidget.h"
 
 #include <QtDebug>
 
@@ -140,11 +139,9 @@ QSizeF *QGraphicsLayoutItemPrivate::effectiveSizeHints(const QSizeF &constraint)
     if (!sizeHintCacheDirty && cachedConstraint == constraint)
         return cachedSizeHints;
 
-    const bool hasConstraint = constraint.width() >= 0 || constraint.height() >= 0;
-
     for (int i = 0; i < Qt::NSizeHints; ++i) {
         cachedSizeHints[i] = constraint;
-        if (userSizeHints && !hasConstraint)
+        if (userSizeHints)
             combineSize(cachedSizeHints[i], userSizeHints[i]);
     }
 
@@ -262,52 +259,6 @@ void QGraphicsLayoutItemPrivate::setSizeComponent(
     q->updateGeometry();
 }
 
-
-bool QGraphicsLayoutItemPrivate::hasHeightForWidth() const
-{
-    Q_Q(const QGraphicsLayoutItem);
-    if (isLayout) {
-        const QGraphicsLayout *l = static_cast<const QGraphicsLayout *>(q);
-        for (int i = l->count() - 1; i >= 0; --i) {
-            if (QGraphicsLayoutItemPrivate::get(l->itemAt(i))->hasHeightForWidth())
-                return true;
-        }
-    } else if (QGraphicsItem *item = q->graphicsItem()) {
-        if (item->isWidget()) {
-            QGraphicsWidget *w = static_cast<QGraphicsWidget *>(item);
-            if (w->layout()) {
-                return QGraphicsLayoutItemPrivate::get(w->layout())->hasHeightForWidth();
-            }
-        }
-    }
-    return q->sizePolicy().hasHeightForWidth();
-}
-
-bool QGraphicsLayoutItemPrivate::hasWidthForHeight() const
-{
-    // enable this code when we add QSizePolicy::hasWidthForHeight() (For 4.8)
-#if 1
-    return false;
-#else
-    Q_Q(const QGraphicsLayoutItem);
-    if (isLayout) {
-        const QGraphicsLayout *l = static_cast<const QGraphicsLayout *>(q);
-        for (int i = l->count() - 1; i >= 0; --i) {
-            if (QGraphicsLayoutItemPrivate::get(l->itemAt(i))->hasWidthForHeight())
-                return true;
-        }
-    } else if (QGraphicsItem *item = q->graphicsItem()) {
-        if (item->isWidget()) {
-            QGraphicsWidget *w = static_cast<QGraphicsWidget *>(item);
-            if (w->layout()) {
-                return QGraphicsLayoutItemPrivate::get(w->layout())->hasWidthForHeight();
-            }
-        }
-    }
-    return q->sizePolicy().hasWidthForHeight();
-#endif
-}
-
 /*!
     \class QGraphicsLayoutItem
     \brief The QGraphicsLayoutItem class can be inherited to allow your custom
diff --git a/src/gui/graphicsview/qgraphicslayoutitem_p.h b/src/gui/graphicsview/qgraphicslayoutitem_p.h
index b752e03..15cc7a5 100644
--- a/src/gui/graphicsview/qgraphicslayoutitem_p.h
+++ b/src/gui/graphicsview/qgraphicslayoutitem_p.h
@@ -65,9 +65,6 @@ class Q_AUTOTEST_EXPORT QGraphicsLayoutItemPrivate
 public:
     virtual ~QGraphicsLayoutItemPrivate();
     QGraphicsLayoutItemPrivate(QGraphicsLayoutItem *parent, bool isLayout);
-    static QGraphicsLayoutItemPrivate *get(QGraphicsLayoutItem *q) { return q->d_func();}
-    static const QGraphicsLayoutItemPrivate *get(const QGraphicsLayoutItem *q) { return q->d_func();}
-
     void init();
     QSizeF *effectiveSizeHints(const QSizeF &constraint) const;
     QGraphicsItem *parentItem() const;
@@ -76,9 +73,6 @@ public:
     enum SizeComponent { Width, Height };
     void setSizeComponent(Qt::SizeHint which, SizeComponent component, qreal value);
 
-    bool hasHeightForWidth() const;
-    bool hasWidthForHeight() const;
-
     QSizePolicy sizePolicy;
     QGraphicsLayoutItem *parent;
 
diff --git a/src/gui/graphicsview/qgraphicslinearlayout.cpp b/src/gui/graphicsview/qgraphicslinearlayout.cpp
index 1588364..7e8d19f 100644
--- a/src/gui/graphicsview/qgraphicslinearlayout.cpp
+++ b/src/gui/graphicsview/qgraphicslinearlayout.cpp
@@ -275,13 +275,17 @@ void QGraphicsLinearLayout::insertItem(int index, QGraphicsLayoutItem *item)
         qWarning("QGraphicsLinearLayout::insertItem: cannot insert itself");
         return;
     }
+    Q_ASSERT(item);
+
+    //the order of the following instructions is very important because
+    //invalidating the layout before adding the child item will make the layout happen
+    //before we try to paint the item
+    invalidate();
     d->addChildLayoutItem(item);
 
-    Q_ASSERT(item);
     d->fixIndex(&index);
     d->engine.insertRow(index, d->orientation);
     new QGridLayoutItem(&d->engine, item, d->gridRow(index), d->gridColumn(index), 1, 1, 0, index);
-    invalidate();
 }
 
 /*!
diff --git a/src/gui/graphicsview/qgridlayoutengine.cpp b/src/gui/graphicsview/qgridlayoutengine.cpp
index f3b2026..ae5bf90 100644
--- a/src/gui/graphicsview/qgridlayoutengine.cpp
+++ b/src/gui/graphicsview/qgridlayoutengine.cpp
@@ -306,20 +306,19 @@ void QGridLayoutRowData::calculateGeometries(int start, int end, qreal targetSiz
                         ultimatePreferredSize = ultimatePreferredSize * 3 / 2;
                         ultimateSumPreferredSizes = ultimateSumPreferredSizes * 3 / 2;
 
-                        qreal ultimateFactor = (stretch * ultimateSumPreferredSizes
-                                                / sumStretches)
-                                               - (box.q_preferredSize);
-                        qreal transitionalFactor = sumCurrentAvailable
-                                                   * (ultimatePreferredSize - box.q_preferredSize)
-                                                   / (ultimateSumPreferredSizes
-                                                      - sumPreferredSizes);
-
-                        qreal alpha = qMin(sumCurrentAvailable,
-                                           ultimateSumPreferredSizes - sumPreferredSizes);
                         qreal beta = ultimateSumPreferredSizes - sumPreferredSizes;
+                        if (!beta) {
+                            factors[i] = 1;
+                        } else {
+                            qreal alpha = qMin(sumCurrentAvailable, beta);
+                            qreal ultimateFactor = (stretch * ultimateSumPreferredSizes / sumStretches)
+                                                   - (box.q_preferredSize);
+                            qreal transitionalFactor = sumCurrentAvailable * (ultimatePreferredSize - box.q_preferredSize) / beta;
+
+                            factors[i] = ((alpha * ultimateFactor)
+                                          + ((beta - alpha) * transitionalFactor)) / beta;
+                        }
 
-                        factors[i] = ((alpha * ultimateFactor)
-                                      + ((beta - alpha) * transitionalFactor)) / beta;
                     }
                     sumFactors += factors[i];
                     if (desired < sumCurrentAvailable)
@@ -546,24 +545,6 @@ QSizePolicy::Policy QGridLayoutItem::sizePolicy(Qt::Orientation orientation) con
                                            : sizePolicy.verticalPolicy();
 }
 
-/*
-  returns true if the size policy returns true for either hasHeightForWidth()
-  or hasWidthForHeight()
- */
-bool QGridLayoutItem::hasDynamicConstraint() const
-{
-    return QGraphicsLayoutItemPrivate::get(q_layoutItem)->hasHeightForWidth()
-        || QGraphicsLayoutItemPrivate::get(q_layoutItem)->hasWidthForHeight();
-}
-
-Qt::Orientation QGridLayoutItem::dynamicConstraintOrientation() const
-{
-    if (QGraphicsLayoutItemPrivate::get(q_layoutItem)->hasHeightForWidth())
-        return Qt::Vertical;
-    else //if (QGraphicsLayoutItemPrivate::get(q_layoutItem)->hasWidthForHeight())
-        return Qt::Horizontal;
-}
-
 QSizePolicy::ControlTypes QGridLayoutItem::controlTypes(LayoutSide /* side */) const
 {
     return q_layoutItem->sizePolicy().controlType();
@@ -632,14 +613,7 @@ QRectF QGridLayoutItem::geometryWithin(qreal x, qreal y, qreal width, qreal heig
         qreal cellWidth = width;
         qreal cellHeight = height;
 
-        QSize constraint;
-        if (hasDynamicConstraint()) {
-            if (dynamicConstraintOrientation() == Qt::Vertical)
-                constraint.setWidth(cellWidth);
-            else
-                constraint.setHeight(cellHeight);
-        }
-        QSizeF size = effectiveMaxSize(constraint).boundedTo(QSizeF(cellWidth, cellHeight));
+        QSizeF size = effectiveMaxSize().boundedTo(QSizeF(cellWidth, cellHeight));
         width = size.width();
         height = size.height();
 
@@ -701,13 +675,13 @@ void QGridLayoutItem::insertOrRemoveRows(int row, int delta, Qt::Orientation ori
     Note that effectiveSizeHint does not take sizePolicy into consideration,
     (since it only evaluates the hints, as the name implies)
 */
-QSizeF QGridLayoutItem::effectiveMaxSize(const QSizeF &constraint) const
+QSizeF QGridLayoutItem::effectiveMaxSize() const
 {
-    QSizeF size = constraint;
+    QSizeF size;
     bool vGrow = (sizePolicy(Qt::Vertical) & QSizePolicy::GrowFlag) == QSizePolicy::GrowFlag;
     bool hGrow = (sizePolicy(Qt::Horizontal) & QSizePolicy::GrowFlag) == QSizePolicy::GrowFlag;
     if (!vGrow || !hGrow) {
-        QSizeF pref = layoutItem()->effectiveSizeHint(Qt::PreferredSize, constraint);
+        QSizeF pref = layoutItem()->effectiveSizeHint(Qt::PreferredSize);
         if (!vGrow)
             size.setHeight(pref.height());
         if (!hGrow)
@@ -715,7 +689,7 @@ QSizeF QGridLayoutItem::effectiveMaxSize(const QSizeF &constraint) const
     }
 
     if (!size.isValid()) {
-        QSizeF maxSize = layoutItem()->effectiveSizeHint(Qt::MaximumSize, constraint);
+        QSizeF maxSize = layoutItem()->effectiveSizeHint(Qt::MaximumSize);
         if (size.width() == -1)
             size.setWidth(maxSize.width());
         if (size.height() == -1)
@@ -1036,7 +1010,6 @@ void QGridLayoutEngine::invalidate()
     q_cachedEffectiveLastRows[Ver] = -1;
     q_cachedDataForStyleInfo.invalidate();
     q_cachedSize = QSizeF();
-    q_cachedConstraintOrientation = UnknownConstraint;
 }
 
 static void visualRect(QRectF *geom, Qt::LayoutDirection dir, const QRectF &contentsRect)
@@ -1101,13 +1074,10 @@ QRectF QGridLayoutEngine::cellRect(const QLayoutStyleInfo &styleInfo,
 }
 
 QSizeF QGridLayoutEngine::sizeHint(const QLayoutStyleInfo &styleInfo, Qt::SizeHint which,
-                                   const QSizeF &constraint) const
+                                   const QSizeF & /* constraint */) const
 {
     ensureColumnAndRowData(styleInfo);
 
-    if (hasDynamicConstraint())
-        return dynamicallyConstrainedSizeHint(which, constraint);
-
     switch (which) {
     case Qt::MinimumSize:
         return QSizeF(q_totalBoxes[Hor].q_minimumSize, q_totalBoxes[Ver].q_minimumSize);
@@ -1405,11 +1375,7 @@ void QGridLayoutEngine::fillRowData(QGridLayoutRowData *rowData, const QLayoutSt
                         box = &multiCell.q_box;
                         multiCell.q_stretch = itemStretch;
                     }
-                    // Items with constraints are not included in the orientation that
-                    // they are constrained (since it depends on the hfw/constraint function).
-                    // They must be combined at a later stage.
-                    if (!item->hasDynamicConstraint() || orientation != item->dynamicConstraintOrientation())
-                        box->combine(item->box(orientation));
+                    box->combine(item->box(orientation));
 
                     if (effectiveRowSpan == 1) {
                         QSizePolicy::ControlTypes controls = item->controlTypes(top);
@@ -1566,138 +1532,6 @@ void QGridLayoutEngine::ensureColumnAndRowData(const QLayoutStyleInfo &styleInfo
     q_cachedDataForStyleInfo = styleInfo;
 }
 
-QSizeF QGridLayoutEngine::dynamicallyConstrainedSizeHint(Qt::SizeHint which,
-                                                         const QSizeF &constraint) const
-{
-    Q_ASSERT(hasDynamicConstraint());
-    if (constraint.width() < 0 && constraint.height() < 0) {
-        // Process the hfw / wfh items that we did not process in fillRowData()
-        const Qt::Orientation constraintOrient = constraintOrientation();
-
-        QGridLayoutRowData rowData = constraintOrient == Qt::Vertical ? q_rowData : q_columnData;
-        for (int i = q_items.count() - 1; i >= 0; --i) {
-            QGridLayoutItem *item = q_items.at(i);
-            if (item->hasDynamicConstraint()) {
-                QGridLayoutBox box = item->box(constraintOrient);
-                QGridLayoutBox &rowBox = rowData.boxes[item->firstRow(constraintOrient)];
-                rowBox.combine(box);
-            }
-        }
-
-        QGridLayoutBox totalBoxes[2];
-        if (constraintOrient == Qt::Vertical) {
-            totalBoxes[Hor] = q_columnData.totalBox(0, columnCount());
-            totalBoxes[Ver] = rowData.totalBox(0, rowCount());
-        } else {
-            totalBoxes[Hor] = rowData.totalBox(0, columnCount());
-            totalBoxes[Ver] = q_rowData.totalBox(0, rowCount());
-        }
-        return QSizeF(totalBoxes[Hor].q_sizes(which), totalBoxes[Ver].q_sizes(which));
-    }
-
-
-    Q_ASSERT(constraint.width() >= 0 || constraint.height() >= 0);
-    q_xx.resize(columnCount());
-    q_yy.resize(rowCount());
-    q_widths.resize(columnCount());
-    q_heights.resize(rowCount());
-    q_descents.resize(rowCount());
-
-
-    const Qt::Orientation orientation = constraintOrientation();
-    QGridLayoutRowData *colData;
-    QGridLayoutRowData constrainedRowData;
-    QGridLayoutBox *totalBox;
-    qreal *sizes;
-    qreal *pos;
-    qreal *descents;
-    qreal targetSize;
-    qreal cCount;
-    qreal rCount;
-
-    if (orientation == Qt::Vertical) {
-        // height for width
-        colData = &q_columnData;
-        totalBox = &q_totalBoxes[Hor];
-        sizes = q_widths.data();
-        pos = q_xx.data();
-        descents = 0;
-        targetSize = constraint.width();
-        cCount = columnCount();
-        rCount = rowCount();
-        constrainedRowData = q_rowData;
-    } else {
-        // width for height
-        colData = &q_rowData;
-        totalBox = &q_totalBoxes[Ver];
-        sizes = q_heights.data();
-        pos = q_yy.data();
-        descents = q_descents.data();
-        targetSize = constraint.height();
-        cCount = rowCount();
-        rCount = columnCount();
-        constrainedRowData = q_columnData;
-    }
-    colData->calculateGeometries(0, cCount, targetSize, pos, sizes, descents, *totalBox);
-    for (int i = q_items.count() - 1; i >= 0; --i) {
-        QGridLayoutItem *item = q_items.at(i);
-
-        if (item->hasDynamicConstraint()) {
-            const qreal size = sizes[item->firstColumn(orientation)];
-            QGridLayoutBox box = item->box(orientation, size);
-            QGridLayoutBox &rowBox = constrainedRowData.boxes[item->firstRow(orientation)];
-            rowBox.combine(box);
-        }
-    }
-    const qreal newSize = constrainedRowData.totalBox(0, rCount).q_sizes(which);
-
-    return (orientation == Qt::Vertical) ? QSizeF(targetSize, newSize) : QSizeF(newSize, targetSize);
-}
-
-
-/**
-   returns false if the layout has contradicting constraints (i.e. some items with a horizontal
-   constraint and other items with a vertical constraint)
- */
-bool QGridLayoutEngine::ensureDynamicConstraint() const
-{
-    if (q_cachedConstraintOrientation == UnknownConstraint) {
-        for (int i = q_items.count() - 1; i >= 0; --i) {
-            QGridLayoutItem *item = q_items.at(i);
-            if (item->hasDynamicConstraint()) {
-                Qt::Orientation itemConstraintOrientation = item->dynamicConstraintOrientation();
-                if (q_cachedConstraintOrientation == UnknownConstraint) {
-                    q_cachedConstraintOrientation = itemConstraintOrientation;
-                } else if (q_cachedConstraintOrientation != itemConstraintOrientation) {
-                    q_cachedConstraintOrientation = UnfeasibleConstraint;
-                    qWarning("QGridLayoutEngine: Unfeasible, cannot mix horizontal and"
-                             " vertical constraint in the same layout");
-                    return false;
-                }
-            }
-        }
-        if (q_cachedConstraintOrientation == UnknownConstraint)
-            q_cachedConstraintOrientation = NoConstraint;
-    }
-    return true;
-}
-
-bool QGridLayoutEngine::hasDynamicConstraint() const
-{
-    if (!ensureDynamicConstraint())
-        return false;
-    return q_cachedConstraintOrientation != NoConstraint;
-}
-
-/*
- * return value is only valid if hasConstraint() returns true
- */
-Qt::Orientation QGridLayoutEngine::constraintOrientation() const
-{
-    (void)ensureDynamicConstraint();
-    return (Qt::Orientation)q_cachedConstraintOrientation;
-}
-
 void QGridLayoutEngine::ensureGeometries(const QLayoutStyleInfo &styleInfo,
                                          const QSizeF &size) const
 {
@@ -1710,74 +1544,10 @@ void QGridLayoutEngine::ensureGeometries(const QLayoutStyleInfo &styleInfo,
     q_widths.resize(columnCount());
     q_heights.resize(rowCount());
     q_descents.resize(rowCount());
-
-
-    Qt::Orientation orientation = Qt::Vertical;
-    if (hasDynamicConstraint())
-        orientation = constraintOrientation();
-
-    /*
-      In order to do hfw we need to first distribute the columns, then the rows.
-      In order to do wfh we need to first distribute the rows, then the columns.
-
-      If there is no constraint, the order of distributing the rows or columns first is irrelevant.
-      We choose horizontal just to keep the same behaviour as before (however, there shouldn't
-      be any behaviour difference).
- */
-
-    QGridLayoutRowData *colData;
-    QGridLayoutRowData rowData;
-    qreal *widths;
-    qreal *heights;
-    qreal *xx;
-    qreal *yy;
-    qreal *xdescents = 0;
-    qreal *ydescents = 0;
-    qreal cCount;
-    qreal rCount;
-    QSizeF oSize = size;
-    if (orientation == Qt::Vertical) {
-        // height for width
-        colData = &q_columnData;
-        rowData = q_rowData;
-        widths = q_widths.data();
-        heights = q_heights.data();
-        xx = q_xx.data();
-        yy = q_yy.data();
-        cCount = columnCount();
-        rCount = rowCount();
-        ydescents = q_descents.data();
-    } else {
-        // width for height
-        colData = &q_rowData;
-        rowData = q_columnData;
-        widths = q_heights.data();
-        heights = q_widths.data();
-        xx = q_yy.data();
-        yy = q_xx.data();
-        cCount = rowCount();
-        rCount = columnCount();
-        xdescents = q_descents.data();
-        oSize.transpose();
-    }
-
-    colData->calculateGeometries(0, cCount, oSize.width(), xx, widths,
-                                 xdescents, q_totalBoxes[orientation == Qt::Horizontal]);
-    for (int i = q_items.count() - 1; i >= 0; --i) {
-        QGridLayoutItem *item = q_items.at(i);
-        const int col = item->firstColumn(orientation);
-        const int row = item->firstRow(orientation);
-        if (item->hasDynamicConstraint()) {
-            const qreal sz = widths[col];
-            QGridLayoutBox box = item->box(orientation, sz);
-            rowData.boxes[row].combine(box);
-        }
-    }
-
-    QGridLayoutBox &totalBox = q_totalBoxes[orientation == Qt::Vertical];
-    totalBox = rowData.totalBox(0, rCount);
-    rowData.calculateGeometries(0, rCount, oSize.height(), yy, heights,
-                                 ydescents, totalBox);
+    q_columnData.calculateGeometries(0, columnCount(), size.width(), q_xx.data(), q_widths.data(),
+                                     0, q_totalBoxes[Hor]);
+    q_rowData.calculateGeometries(0, rowCount(), size.height(), q_yy.data(), q_heights.data(),
+                                  q_descents.data(), q_totalBoxes[Ver]);
 
     q_cachedSize = size;
 }
diff --git a/src/gui/graphicsview/qgridlayoutengine_p.h b/src/gui/graphicsview/qgridlayoutengine_p.h
index 580af7e..9ac9a8e 100644
--- a/src/gui/graphicsview/qgridlayoutengine_p.h
+++ b/src/gui/graphicsview/qgridlayoutengine_p.h
@@ -91,14 +91,6 @@ enum LayoutSide {
     Bottom
 };
 
-enum {
-    NoConstraint,
-    HorizontalConstraint,
-    VerticalConstraint,
-    UnknownConstraint,      // need to update cache
-    UnfeasibleConstraint    // not feasible, it be has some items with Vertical and others with Horizontal constraints
-};
-
 template <typename T>
 class QLayoutParameter
 {
@@ -278,10 +270,6 @@ public:
     inline void setAlignment(Qt::Alignment alignment) { q_alignment = alignment; }
 
     QSizePolicy::Policy sizePolicy(Qt::Orientation orientation) const;
-
-    bool hasDynamicConstraint() const;
-    Qt::Orientation dynamicConstraintOrientation() const;
-
     QSizePolicy::ControlTypes controlTypes(LayoutSide side) const;
     QSizeF sizeHint(Qt::SizeHint which, const QSizeF &constraint = QSizeF()) const;
     QGridLayoutBox box(Qt::Orientation orientation, qreal constraint = -1.0) const;
@@ -292,7 +280,7 @@ public:
     void setGeometry(const QRectF &rect);
     void transpose();
     void insertOrRemoveRows(int row, int delta, Qt::Orientation orientation = Qt::Vertical);
-    QSizeF effectiveMaxSize(const QSizeF &constraint) const;
+    QSizeF effectiveMaxSize() const;
 
 #ifdef QT_DEBUG
     void dump(int indent = 0) const;
@@ -384,14 +372,6 @@ public:
                     int column, int rowSpan, int columnSpan) const;
     QSizeF sizeHint(const QLayoutStyleInfo &styleInfo, Qt::SizeHint which,
                     const QSizeF &constraint) const;
-
-    // heightForWidth / widthForHeight support
-    QSizeF dynamicallyConstrainedSizeHint(Qt::SizeHint which, const QSizeF &constraint) const;
-    bool ensureDynamicConstraint() const;
-    bool hasDynamicConstraint() const;
-    Qt::Orientation constraintOrientation() const;
-
-
     QSizePolicy::ControlTypes controlTypes(LayoutSide side) const;
     void transpose();
     void setVisualDirection(Qt::LayoutDirection direction);
@@ -425,7 +405,6 @@ private:
     // Lazily computed from the above user input
     mutable int q_cachedEffectiveFirstRows[NOrientations];
     mutable int q_cachedEffectiveLastRows[NOrientations];
-    mutable quint8 q_cachedConstraintOrientation : 2;
 
     // Layout item input
     mutable QLayoutStyleInfo q_cachedDataForStyleInfo;
diff --git a/src/gui/image/qgifhandler.cpp b/src/gui/image/qgifhandler.cpp
index 124d27b..a050baf 100644
--- a/src/gui/image/qgifhandler.cpp
+++ b/src/gui/image/qgifhandler.cpp
@@ -505,17 +505,26 @@ int QGIFFormat::decode(QImage *image, const uchar *buffer, int length,
                             code=oldcode;
                         }
                         while (code>=clear_code+2) {
+                            if (code >= max_code) {
+                                state = Error;
+                                return -1;
+                            }
                             *sp++=table[1][code];
                             if (code==table[0][code]) {
                                 state=Error;
-                                break;
+                                return -1;
                             }
                             if (sp-stack>=(1<<(max_lzw_bits))*2) {
                                 state=Error;
-                                break;
+                                return -1;
                             }
                             code=table[0][code];
                         }
+                        if (code < 0) {
+                            state = Error;
+                            return -1;
+                        }
+
                         *sp++=firstcode=table[1][code];
                         code=max_code;
                         if (code<(1<<max_lzw_bits)) {
diff --git a/src/gui/image/qjpeghandler.cpp b/src/gui/image/qjpeghandler.cpp
index b9eda05..d47cc82 100644
--- a/src/gui/image/qjpeghandler.cpp
+++ b/src/gui/image/qjpeghandler.cpp
@@ -648,22 +648,28 @@ static bool write_jpeg_image(const QImage &image, QIODevice *device, int sourceQ
                 break;
             case QImage::Format_RGB32:
             case QImage::Format_ARGB32:
-            case QImage::Format_ARGB32_Premultiplied: {
-                const QRgb* rgb = (const QRgb*)image.constScanLine(cinfo.next_scanline);
-                for (int i=0; i<w; i++) {
-                    *row++ = qRed(*rgb);
-                    *row++ = qGreen(*rgb);
-                    *row++ = qBlue(*rgb);
-                    ++rgb;
+            case QImage::Format_ARGB32_Premultiplied:
+                {
+                    const QRgb* rgb = (const QRgb*)image.constScanLine(cinfo.next_scanline);
+                    for (int i=0; i<w; i++) {
+                        *row++ = qRed(*rgb);
+                        *row++ = qGreen(*rgb);
+                        *row++ = qBlue(*rgb);
+                        ++rgb;
+                    }
                 }
                 break;
-            }
             default:
-                for (int i=0; i<w; i++) {
-                    QRgb pix = image.pixel(i, cinfo.next_scanline);
-                    *row++ = qRed(pix);
-                    *row++ = qGreen(pix);
-                    *row++ = qBlue(pix);
+                {
+                    // (Testing shows that this way is actually faster than converting to RGB888 + memcpy)
+                    QImage rowImg = image.copy(0, cinfo.next_scanline, w, 1).convertToFormat(QImage::Format_RGB32);
+                    const QRgb* rgb = (const QRgb*)rowImg.constScanLine(0);
+                    for (int i=0; i<w; i++) {
+                        *row++ = qRed(*rgb);
+                        *row++ = qGreen(*rgb);
+                        *row++ = qBlue(*rgb);
+                        ++rgb;
+                    }
                 }
                 break;
             }
diff --git a/src/gui/image/qpnghandler.cpp b/src/gui/image/qpnghandler.cpp
index dc54313..935aba0 100644
--- a/src/gui/image/qpnghandler.cpp
+++ b/src/gui/image/qpnghandler.cpp
@@ -678,41 +678,19 @@ bool QPNGImageWriter::writeImage(const QImage& image, int off_x, int off_y)
     return writeImage(image, -1, QString(), off_x, off_y);
 }
 
-bool Q_INTERNAL_WIN_NO_THROW QPNGImageWriter::writeImage(const QImage& image_in, int quality_in, const QString &description,
+bool Q_INTERNAL_WIN_NO_THROW QPNGImageWriter::writeImage(const QImage& image, int quality_in, const QString &description,
                                  int off_x_in, int off_y_in)
 {
 #ifdef QT_NO_IMAGE_TEXT
     Q_UNUSED(description);
 #endif
 
-    QImage image;
-    switch (image_in.format()) {
-    case QImage::Format_ARGB32_Premultiplied:
-    case QImage::Format_ARGB4444_Premultiplied:
-    case QImage::Format_ARGB8555_Premultiplied:
-    case QImage::Format_ARGB8565_Premultiplied:
-    case QImage::Format_ARGB6666_Premultiplied:
-        image = image_in.convertToFormat(QImage::Format_ARGB32);
-        break;
-    case QImage::Format_RGB16:
-    case QImage::Format_RGB444:
-    case QImage::Format_RGB555:
-    case QImage::Format_RGB666:
-    case QImage::Format_RGB888:
-        image = image_in.convertToFormat(QImage::Format_RGB32);
-        break;
-    default:
-        image = image_in;
-        break;
-    }
-
     QPoint offset = image.offset();
     int off_x = off_x_in + offset.x();
     int off_y = off_y_in + offset.y();
 
     png_structp png_ptr;
     png_infop info_ptr;
-    png_bytep* row_pointers;
 
     png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING,0,0,0);
     if (!png_ptr) {
@@ -743,13 +721,18 @@ bool Q_INTERNAL_WIN_NO_THROW QPNGImageWriter::writeImage(const QImage& image_in,
 
     png_set_write_fn(png_ptr, (void*)this, qpiw_write_fn, qpiw_flush_fn);
 
+
+    int color_type = 0;
+    if (image.colorCount())
+        color_type = PNG_COLOR_TYPE_PALETTE;
+    else if (image.hasAlphaChannel())
+        color_type = PNG_COLOR_TYPE_RGB_ALPHA;
+    else
+        color_type = PNG_COLOR_TYPE_RGB;
+
     png_set_IHDR(png_ptr, info_ptr, image.width(), image.height(),
-        image.depth() == 1 ? 1 : 8 /* per channel */,
-        image.depth() == 32
-            ? image.format() == QImage::Format_RGB32
-                ? PNG_COLOR_TYPE_RGB
-                : PNG_COLOR_TYPE_RGB_ALPHA
-            : PNG_COLOR_TYPE_PALETTE, 0, 0, 0);  // also sets #channels
+                 image.depth() == 1 ? 1 : 8, // per channel
+                 color_type, 0, 0, 0);       // sets #channels
 
     if (gamma != 0.0) {
         png_set_gAMA(png_ptr, info_ptr, 1.0/gamma);
@@ -794,8 +777,9 @@ bool Q_INTERNAL_WIN_NO_THROW QPNGImageWriter::writeImage(const QImage& image_in,
         png_set_swap_alpha(png_ptr);
     }
 
-    // Qt==ARGB==Big(ARGB)==Little(BGRA)
-    if (QSysInfo::ByteOrder == QSysInfo::LittleEndian) {
+    // Qt==ARGB==Big(ARGB)==Little(BGRA). But RGB888 is RGB regardless
+    if (QSysInfo::ByteOrder == QSysInfo::LittleEndian
+        && image.format() != QImage::Format_RGB888) {
         png_set_bgr(png_ptr);
     }
 
@@ -820,7 +804,7 @@ bool Q_INTERNAL_WIN_NO_THROW QPNGImageWriter::writeImage(const QImage& image_in,
     if (image.depth() != 1)
         png_set_packing(png_ptr);
 
-    if (image.format() == QImage::Format_RGB32)
+    if (color_type == PNG_COLOR_TYPE_RGB && image.format() != QImage::Format_RGB888)
         png_set_filler(png_ptr, 0,
             QSysInfo::ByteOrder == QSysInfo::BigEndian ?
                 PNG_FILLER_BEFORE : PNG_FILLER_AFTER);
@@ -841,22 +825,36 @@ bool Q_INTERNAL_WIN_NO_THROW QPNGImageWriter::writeImage(const QImage& image_in,
         png_write_chunk(png_ptr, (png_byte*)"gIFg", data, 4);
     }
 
-    png_uint_32 width;
-    png_uint_32 height;
-    int bit_depth;
-    int color_type;
-    png_get_IHDR(png_ptr, info_ptr, &width, &height, &bit_depth, &color_type,
-        0, 0, 0);
-
-    const uchar *data = (static_cast<const QImage *>(&image))->bits();
-    int bpl = image.bytesPerLine();
-    row_pointers = new png_bytep[height];
-    uint y;
-    for (y=0; y<height; y++) {
-        row_pointers[y] = (png_bytep)(data + y * bpl);
+    int height = image.height();
+    int width = image.width();
+    switch (image.format()) {
+    case QImage::Format_Mono:
+    case QImage::Format_MonoLSB:
+    case QImage::Format_Indexed8:
+    case QImage::Format_RGB32:
+    case QImage::Format_ARGB32:
+    case QImage::Format_RGB888:
+        {
+            png_bytep* row_pointers = new png_bytep[height];
+            for (int y=0; y<height; y++)
+                row_pointers[y] = (png_bytep)image.constScanLine(y);
+            png_write_image(png_ptr, row_pointers);
+            delete [] row_pointers;
+        }
+        break;
+    default:
+        {
+            QImage::Format fmt = image.hasAlphaChannel() ? QImage::Format_ARGB32 : QImage::Format_RGB32;
+            QImage row;
+            png_bytep row_pointers[1];
+            for (int y=0; y<height; y++) {
+                row = image.copy(0, y, width, 1).convertToFormat(fmt);
+                row_pointers[0] = png_bytep(row.constScanLine(0));
+                png_write_rows(png_ptr, row_pointers, 1);
+            }
+        }
+        break;
     }
-    png_write_image(png_ptr, row_pointers);
-    delete [] row_pointers;
 
     png_write_end(png_ptr, info_ptr);
     frames_written++;
diff --git a/src/gui/painting/qgrayraster.c b/src/gui/painting/qgrayraster.c
index d0e25a9..ec9ebeb 100644
--- a/src/gui/painting/qgrayraster.c
+++ b/src/gui/painting/qgrayraster.c
@@ -325,6 +325,7 @@
   {
     void*    buffer;
     long     buffer_size;
+    long     buffer_allocated_size;
     int      band_size;
     void*    memory;
     PWorker  worker;
@@ -1791,7 +1792,7 @@
     // If raster object and raster buffer are allocated, but
     // raster size isn't of the minimum size, indicate out of
     // memory.
-    if (raster && raster->buffer && raster->buffer_size < MINIMUM_POOL_SIZE )
+    if (raster->buffer_allocated_size < MINIMUM_POOL_SIZE )
       return ErrRaster_OutOfMemory;
 
     /* return immediately if the outline is empty */
@@ -1930,6 +1931,7 @@
         rast->buffer_size = 0;
         rast->worker      = NULL;
       }
+      rast->buffer_allocated_size = pool_size;
     }
   }
 
diff --git a/src/gui/painting/qpaintengine_raster.cpp b/src/gui/painting/qpaintengine_raster.cpp
index 36e1082..135ae00 100644
--- a/src/gui/painting/qpaintengine_raster.cpp
+++ b/src/gui/painting/qpaintengine_raster.cpp
@@ -4233,6 +4233,8 @@ void QRasterPaintEnginePrivate::rasterize(QT_FT_Outline *outline,
                 break;
             }
 
+            rendered_spans += q_gray_rendered_spans(*grayRaster.data());
+
 #if defined(Q_WS_WIN64)
             _aligned_free(rasterPoolBase);
 #else
diff --git a/src/gui/painting/qpaintengineex.cpp b/src/gui/painting/qpaintengineex.cpp
index 1e857e4..c1e3d66 100644
--- a/src/gui/painting/qpaintengineex.cpp
+++ b/src/gui/painting/qpaintengineex.cpp
@@ -517,7 +517,7 @@ void QPaintEngineEx::stroke(const QVectorPath &path, const QPen &pen)
             QPainterPath painterPath = state()->matrix.map(path.convertToPainterPath());
             d->activeStroker->strokePath(painterPath, d->strokeHandler, QTransform());
         } else {
-            d->activeStroker->setCurveThresholdFromTransform(state()->matrix);
+            d->activeStroker->setCurveThresholdFromTransform(QTransform());
             d->activeStroker->begin(d->strokeHandler);
             if (types) {
                 while (points < lastPoint) {
diff --git a/src/gui/painting/qpainter.cpp b/src/gui/painting/qpainter.cpp
index 5fbe3ed..7fed7e4 100644
--- a/src/gui/painting/qpainter.cpp
+++ b/src/gui/painting/qpainter.cpp
@@ -6185,7 +6185,7 @@ void QPainter::drawText(const QRectF &r, int flags, const QString &str, QRectF *
 
     By default, QPainter draws text anti-aliased.
 
-    \note The y-position is used as the baseline of the font.
+    \note The y-position is used as the top of the font.
 
     \sa Qt::AlignmentFlag, Qt::TextFlag
 */
diff --git a/src/gui/painting/qpdf.cpp b/src/gui/painting/qpdf.cpp
index 6e02435..ba5d164 100644
--- a/src/gui/painting/qpdf.cpp
+++ b/src/gui/painting/qpdf.cpp
@@ -916,24 +916,6 @@ const char *QPdf::paperSizeToString(QPrinter::PaperSize paperSize)
 }
 
 
-QByteArray QPdf::stripSpecialCharacters(const QByteArray &string)
-{
-    QByteArray s = string;
-    s.replace(' ', "");
-    s.replace('(', "");
-    s.replace(')', "");
-    s.replace('<', "");
-    s.replace('>', "");
-    s.replace('[', "");
-    s.replace(']', "");
-    s.replace('{', "");
-    s.replace('}', "");
-    s.replace('/', "");
-    s.replace('%', "");
-    return s;
-}
-
-
 // -------------------------- base engine, shared code between PS and PDF -----------------------
 
 QPdfBaseEngine::QPdfBaseEngine(QPdfBaseEnginePrivate &dd, PaintEngineFeatures f)
diff --git a/src/gui/painting/qpdf_p.h b/src/gui/painting/qpdf_p.h
index 9c4d05d..5c5ceb4 100644
--- a/src/gui/painting/qpdf_p.h
+++ b/src/gui/painting/qpdf_p.h
@@ -156,8 +156,6 @@ namespace QPdf {
     PaperSize paperSize(QPrinter::PaperSize paperSize);
     const char *paperSizeToString(QPrinter::PaperSize paperSize);
 
-
-    QByteArray stripSpecialCharacters(const QByteArray &string);
 }
 
 
diff --git a/src/gui/painting/qrasterdefs_p.h b/src/gui/painting/qrasterdefs_p.h
index 4131e4b..f6339ed 100644
--- a/src/gui/painting/qrasterdefs_p.h
+++ b/src/gui/painting/qrasterdefs_p.h
@@ -100,7 +100,7 @@ QT_FT_BEGIN_HEADER
   /*    distances in integer font units, or 16,16, or 26.6 fixed float     */
   /*    pixel coordinates.                                                 */
   /*                                                                       */
-  typedef signed long  QT_FT_Pos;
+  typedef signed int  QT_FT_Pos;
 
 
   /*************************************************************************/
diff --git a/src/gui/painting/qstroker.cpp b/src/gui/painting/qstroker.cpp
index 9cff339..9decf41 100644
--- a/src/gui/painting/qstroker.cpp
+++ b/src/gui/painting/qstroker.cpp
@@ -190,6 +190,7 @@ static inline qreal adapted_angle_on_x(const QLineF &line)
 QStrokerOps::QStrokerOps()
     : m_elements(0)
     , m_curveThreshold(qt_real_to_fixed(0.25))
+    , m_dashThreshold(qt_real_to_fixed(0.25))
     , m_customData(0)
     , m_moveTo(0)
     , m_lineTo(0)
@@ -243,7 +244,7 @@ void QStrokerOps::strokePath(const QPainterPath &path, void *customData, const Q
     if (path.isEmpty())
         return;
 
-    setCurveThresholdFromTransform(matrix);
+    setCurveThresholdFromTransform(QTransform());
     begin(customData);
     int count = path.elementCount();
     if (matrix.isIdentity()) {
@@ -315,7 +316,7 @@ void QStrokerOps::strokePolygon(const QPointF *points, int pointCount, bool impl
     if (!pointCount)
         return;
 
-    setCurveThresholdFromTransform(matrix);
+    setCurveThresholdFromTransform(QTransform());
     begin(data);
     if (matrix.isIdentity()) {
         moveTo(qt_real_to_fixed(points[0].x()), qt_real_to_fixed(points[0].y()));
@@ -356,7 +357,7 @@ void QStrokerOps::strokeEllipse(const QRectF &rect, void *data, const QTransform
         }
     }
 
-    setCurveThresholdFromTransform(matrix);
+    setCurveThresholdFromTransform(QTransform());
     begin(data);
     moveTo(qt_real_to_fixed(start.x()), qt_real_to_fixed(start.y()));
     for (int i=0; i<12; i+=3) {
@@ -1142,7 +1143,7 @@ void QDashStroker::processCurrentSubpath()
 
     QPainterPath dashPath;
 
-    QSubpathFlatIterator it(&m_elements, m_curveThreshold);
+    QSubpathFlatIterator it(&m_elements, m_dashThreshold);
     qfixed2d prev = it.next();
 
     bool clipping = !m_clip_rect.isEmpty();
diff --git a/src/gui/painting/qstroker_p.h b/src/gui/painting/qstroker_p.h
index d646135..5607a8e 100644
--- a/src/gui/painting/qstroker_p.h
+++ b/src/gui/painting/qstroker_p.h
@@ -168,7 +168,7 @@ public:
     {
         qreal scale;
         qt_scaleForTransform(transform, &scale);
-        setCurveThreshold(scale == 0 ? qreal(0.5) : (qreal(0.5) / scale));
+        m_dashThreshold = scale == 0 ? qreal(0.5) : (qreal(0.5) / scale);
     }
 
     void setCurveThreshold(qfixed threshold) { m_curveThreshold = threshold; }
@@ -184,6 +184,7 @@ protected:
 
     QRectF m_clip_rect;
     qfixed m_curveThreshold;
+    qfixed m_dashThreshold;
 
     void *m_customData;
     qStrokerMoveToHook m_moveTo;
diff --git a/src/gui/text/qfontengine.cpp b/src/gui/text/qfontengine.cpp
index 0dfd295..7e04180 100644
--- a/src/gui/text/qfontengine.cpp
+++ b/src/gui/text/qfontengine.cpp
@@ -46,7 +46,6 @@
 #include "qpainter.h"
 #include "qpainterpath.h"
 #include "qvarlengtharray.h"
-#include <private/qpdf_p.h>
 #include <qmath.h>
 #include <qendian.h>
 #include <private/qharfbuzz_p.h>
@@ -667,11 +666,7 @@ void QFontEngine::removeGlyphFromCache(glyph_t)
 QFontEngine::Properties QFontEngine::properties() const
 {
     Properties p;
-#ifndef QT_NO_PRINTER
-    QByteArray psname = QPdf::stripSpecialCharacters(fontDef.family.toUtf8());
-#else
-    QByteArray psname = fontDef.family.toUtf8();
-#endif
+    QByteArray psname = QFontEngine::convertToPostscriptFontFamilyName(fontDef.family.toUtf8());
     psname += '-';
     psname += QByteArray::number(fontDef.style);
     psname += '-';
@@ -1081,6 +1076,23 @@ quint32 QFontEngine::getTrueTypeGlyphIndex(const uchar *cmap, uint unicode)
     return 0;
 }
 
+QByteArray QFontEngine::convertToPostscriptFontFamilyName(const QByteArray &family)
+{
+    QByteArray f = family;
+    f.replace(' ', "");
+    f.replace('(', "");
+    f.replace(')', "");
+    f.replace('<', "");
+    f.replace('>', "");
+    f.replace('[', "");
+    f.replace(']', "");
+    f.replace('{', "");
+    f.replace('}', "");
+    f.replace('/', "");
+    f.replace('%', "");
+    return f;
+}
+
 Q_GLOBAL_STATIC_WITH_INITIALIZER(QVector<QRgb>, qt_grayPalette, {
     x->resize(256);
     QRgb *it = x->data();
diff --git a/src/gui/text/qfontengine_ft.cpp b/src/gui/text/qfontengine_ft.cpp
index a9b25f5..cc6af7f 100644
--- a/src/gui/text/qfontengine_ft.cpp
+++ b/src/gui/text/qfontengine_ft.cpp
@@ -51,7 +51,6 @@
 #include "qabstractfileengine.h"
 #include "qthreadstorage.h"
 #include <qmath.h>
-#include <private/qpdf_p.h>
 #include <private/qharfbuzz_p.h>
 
 #include "qfontengine_ft_p.h"
@@ -1196,10 +1195,7 @@ QFontEngine::Properties QFontEngineFT::properties() const
 {
     Properties p = freetype->properties();
     if (p.postscriptName.isEmpty()) {
-        p.postscriptName = fontDef.family.toUtf8();
-#ifndef QT_NO_PRINTER
-        p.postscriptName = QPdf::stripSpecialCharacters(p.postscriptName);
-#endif
+        p.postscriptName = QFontEngine::convertToPostscriptFontFamilyName(fontDef.family.toUtf8());
     }
 
     return freetype->properties();
diff --git a/src/gui/text/qfontengine_mac.mm b/src/gui/text/qfontengine_mac.mm
index bdf3848..b3efe6c 100644
--- a/src/gui/text/qfontengine_mac.mm
+++ b/src/gui/text/qfontengine_mac.mm
@@ -46,7 +46,6 @@
 #include <qbitmap.h>
 #include <private/qpaintengine_mac_p.h>
 #include <private/qprintengine_mac_p.h>
-#include <private/qpdf_p.h>
 #include <qglobal.h>
 #include <qpixmap.h>
 #include <qpixmapcache.h>
@@ -1853,7 +1852,7 @@ QFontEngine::Properties QFontEngineMac::properties() const
     QCFString psName;
     if (ATSFontGetPostScriptName(FMGetATSFontRefFromFont(fontID), kATSOptionFlagsDefault, &psName) == noErr)
         props.postscriptName = QString(psName).toUtf8();
-    props.postscriptName = QPdf::stripSpecialCharacters(props.postscriptName);
+    props.postscriptName = QFontEngine::convertToPostscriptFontFamilyName(props.postscriptName);
     return props;
 }
 
diff --git a/src/gui/text/qfontengine_p.h b/src/gui/text/qfontengine_p.h
index 3b91cd8..571cf98 100644
--- a/src/gui/text/qfontengine_p.h
+++ b/src/gui/text/qfontengine_p.h
@@ -227,6 +227,8 @@ public:
     static const uchar *getCMap(const uchar *table, uint tableSize, bool *isSymbolFont, int *cmapSize);
     static quint32 getTrueTypeGlyphIndex(const uchar *cmap, uint unicode);
 
+    static QByteArray convertToPostscriptFontFamilyName(const QByteArray &fontFamily);
+
     QAtomicInt ref;
     QFontDef fontDef;
     uint cache_cost; // amount of mem used in kb by the font
diff --git a/src/gui/text/qfontengine_win.cpp b/src/gui/text/qfontengine_win.cpp
index ef1b504..7609ee5 100644
--- a/src/gui/text/qfontengine_win.cpp
+++ b/src/gui/text/qfontengine_win.cpp
@@ -63,7 +63,6 @@
 #include <qbitmap.h>
 
 #include <private/qpainter_p.h>
-#include <private/qpdf_p.h>
 #include "qpaintengine.h"
 #include "qvarlengtharray.h"
 #include <private/qpaintengine_raster_p.h>
@@ -1039,9 +1038,7 @@ QFontEngine::Properties QFontEngineWin::properties() const
     p.italicAngle = otm->otmItalicAngle;
     p.postscriptName = QString::fromWCharArray((wchar_t *)((char *)otm + (quintptr)otm->otmpFamilyName)).toLatin1();
     p.postscriptName += QString::fromWCharArray((wchar_t *)((char *)otm + (quintptr)otm->otmpStyleName)).toLatin1();
-#ifndef QT_NO_PRINTER
-    p.postscriptName = QPdf::stripSpecialCharacters(p.postscriptName);
-#endif
+    p.postscriptName = QFontEngine::convertToPostscriptFontFamilyName(p.postscriptName);
     p.boundingBox = QRectF(otm->otmrcFontBox.left, -otm->otmrcFontBox.top,
                            otm->otmrcFontBox.right - otm->otmrcFontBox.left,
                            otm->otmrcFontBox.top - otm->otmrcFontBox.bottom);
diff --git a/src/opengl/qgl.cpp b/src/opengl/qgl.cpp
index 0d1a66e..9e74e04 100644
--- a/src/opengl/qgl.cpp
+++ b/src/opengl/qgl.cpp
@@ -509,6 +509,9 @@ QGLFormat::~QGLFormat()
     exchange the screen contents with the buffer. The result is
     flicker-free drawing and often better performance.
 
+    Note that single buffered contexts are currently not supported
+    with EGL.
+
     \sa doubleBuffer(), QGLContext::swapBuffers(),
     QGLWidget::swapBuffers()
 */
@@ -1689,6 +1692,9 @@ void QGLContextPrivate::init(QPaintDevice *dev, const QGLFormat &format)
     workaround_brokenFBOReadBack = false;
     workaroundsCached = false;
 
+    workaround_brokenTextureFromPixmap = false;
+    workaround_brokenTextureFromPixmap_init = false;
+
     for (int i = 0; i < QT_GL_VERTEX_ARRAY_TRACKED_COUNT; ++i)
         vertexAttributeArraysEnabledState[i] = false;
 }
@@ -2574,18 +2580,34 @@ QGLTexture *QGLContextPrivate::bindTexture(const QPixmap &pixmap, GLenum target,
         }
     }
 
-#if defined(Q_WS_X11) && !defined(QT_NO_EGL)
-    // Only try to use texture_from_pixmap under X11/EGL
+#if defined(Q_WS_X11)
+    // Try to use texture_from_pixmap
     const QX11Info *xinfo = qt_x11Info(paintDevice);
     if (pd->classId() == QPixmapData::X11Class && pd->pixelType() == QPixmapData::PixmapType
         && xinfo && xinfo->screen() == pixmap.x11Info().screen()
         && target == GL_TEXTURE_2D)
     {
-        texture = bindTextureFromNativePixmap(const_cast<QPixmap*>(&pixmap), key, options);
-        if (texture) {
-            texture->options |= QGLContext::MemoryManagedBindOption;
-            texture->boundPixmap = pd;
-            boundPixmaps.insert(pd, QPixmap(pixmap));
+        if (!workaround_brokenTextureFromPixmap_init) {
+            workaround_brokenTextureFromPixmap_init = true;
+
+            const QByteArray versionString(reinterpret_cast<const char*>(glGetString(GL_VERSION)));
+            const int pos = versionString.indexOf("NVIDIA ");
+
+            if (pos >= 0) {
+                const QByteArray nvidiaVersionString = versionString.mid(pos + strlen("NVIDIA "));
+
+                if (nvidiaVersionString.startsWith("195") || nvidiaVersionString.startsWith("256"))
+                    workaround_brokenTextureFromPixmap = true;
+            }
+        }
+
+        if (!workaround_brokenTextureFromPixmap) {
+            texture = bindTextureFromNativePixmap(const_cast<QPixmap*>(&pixmap), key, options);
+            if (texture) {
+                texture->options |= QGLContext::MemoryManagedBindOption;
+                texture->boundPixmap = pd;
+                boundPixmaps.insert(pd, QPixmap(pixmap));
+            }
         }
     }
 #endif
diff --git a/src/opengl/qgl_egl.cpp b/src/opengl/qgl_egl.cpp
index ebd1169..c79c4cd 100644
--- a/src/opengl/qgl_egl.cpp
+++ b/src/opengl/qgl_egl.cpp
@@ -143,6 +143,7 @@ void qt_glformat_from_eglconfig(QGLFormat& format, const EGLConfig config)
     format.setRgba(true);            // EGL doesn't support colour index rendering
     format.setStereo(false);         // EGL doesn't support stereo buffers
     format.setAccumBufferSize(0);    // EGL doesn't support accululation buffers
+    format.setDoubleBuffer(true);    // We don't support single buffered EGL contexts
 
     // Clear the EGL error state because some of the above may
     // have errored out because the attribute is not applicable
diff --git a/src/opengl/qgl_p.h b/src/opengl/qgl_p.h
index 6323ce2..623eeaf 100644
--- a/src/opengl/qgl_p.h
+++ b/src/opengl/qgl_p.h
@@ -401,6 +401,9 @@ public:
     uint workaround_brokenFBOReadBack : 1;
     uint workaroundsCached : 1;
 
+    uint workaround_brokenTextureFromPixmap : 1;
+    uint workaround_brokenTextureFromPixmap_init : 1;
+
     QPaintDevice *paintDevice;
     QColor transpColor;
     QGLContext *q_ptr;
diff --git a/src/opengl/qglpixelbuffer_win.cpp b/src/opengl/qglpixelbuffer_win.cpp
index b55f383..c61d9bf 100644
--- a/src/opengl/qglpixelbuffer_win.cpp
+++ b/src/opengl/qglpixelbuffer_win.cpp
@@ -172,6 +172,10 @@ typedef BOOL (WINAPI * PFNWGLSETPBUFFERATTRIBARBPROC) (HPBUFFERARB hPbuffer, con
 #define WGL_SAMPLES_ARB                0x2042
 #endif
 
+#ifndef GL_SAMPLES_ARB
+#define GL_SAMPLES_ARB 0x80A9
+#endif
+
 QGLFormat pfiToQGLFormat(HDC hdc, int pfi);
 
 static void qt_format_to_attrib_list(bool has_render_texture, const QGLFormat &f, int attribs[])
@@ -242,8 +246,7 @@ static void qt_format_to_attrib_list(bool has_render_texture, const QGLFormat &f
 
 bool QGLPixelBufferPrivate::init(const QSize &size, const QGLFormat &f, QGLWidget *shareWidget)
 {
-    QGLWidget dmy;
-    dmy.makeCurrent(); // needed for wglGetProcAddress() to succeed
+    QGLTemporaryContext tempContext;
 
     PFNWGLCREATEPBUFFERARBPROC wglCreatePbufferARB =
         (PFNWGLCREATEPBUFFERARBPROC) wglGetProcAddress("wglCreatePbufferARB");
@@ -257,13 +260,12 @@ bool QGLPixelBufferPrivate::init(const QSize &size, const QGLFormat &f, QGLWidge
     if (!wglCreatePbufferARB) // assumes that if one can be resolved, all of them can
         return false;
 
-    dc = GetDC(dmy.winId());
+    dc = wglGetCurrentDC();
     Q_ASSERT(dc);
+    has_render_texture = false;
 
     // sample buffers doesn't work in conjunction with the render_texture extension
-    if (f.sampleBuffers()) {
-        has_render_texture = false;
-    } else {
+    if (!f.sampleBuffers()) {
         PFNWGLGETEXTENSIONSSTRINGARBPROC wglGetExtensionsStringARB =
                 (PFNWGLGETEXTENSIONSSTRINGARBPROC) wglGetProcAddress("wglGetExtensionsStringARB");
 
@@ -292,7 +294,6 @@ bool QGLPixelBufferPrivate::init(const QSize &size, const QGLFormat &f, QGLWidge
 
     if (num_formats == 0) {
         qWarning("QGLPixelBuffer: Unable to find a pixel format with pbuffer  - giving up.");
-        ReleaseDC(dmy.winId(), dc);
         return false;
     }
     format = pfiToQGLFormat(dc, pixel_format);
@@ -305,26 +306,32 @@ bool QGLPixelBufferPrivate::init(const QSize &size, const QGLFormat &f, QGLWidge
 
     pbuf = wglCreatePbufferARB(dc, pixel_format, size.width(), size.height(),
                                has_render_texture ? pb_attribs : 0);
-    if(!pbuf) {
+    if (!pbuf) {
         // try again without the render_texture extension
         pbuf = wglCreatePbufferARB(dc, pixel_format, size.width(), size.height(), 0);
         has_render_texture = false;
         if (!pbuf) {
             qWarning("QGLPixelBuffer: Unable to create pbuffer [w=%d, h=%d] - giving up.", size.width(), size.height());
-            ReleaseDC(dmy.winId(), dc);
             return false;
         }
     }
 
-    ReleaseDC(dmy.winId(), dc);
     dc = wglGetPbufferDCARB(pbuf);
     ctx = wglCreateContext(dc);
-
     if (!dc || !ctx) {
         qWarning("QGLPixelBuffer: Unable to create pbuffer context - giving up.");
         return false;
     }
 
+    // Explicitly disable the render_texture extension if we have a 
+    // multi-sampled pbuffer context. This seems to be a problem only with 
+    // ATI cards if multi-sampling is forced globally in the driver.
+    wglMakeCurrent(dc, ctx);
+    GLint samples = 0;
+    glGetIntegerv(GL_SAMPLES_ARB, &samples);
+    if (has_render_texture && samples != 0)
+        has_render_texture = false;
+
     HGLRC share_ctx = shareWidget ? shareWidget->d_func()->glcx->d_func()->rc : 0;
     if (share_ctx && !wglShareLists(share_ctx, ctx))
         qWarning("QGLPixelBuffer: Unable to share display lists - with share widget.");
diff --git a/src/opengl/qpaintengine_opengl.cpp b/src/opengl/qpaintengine_opengl.cpp
index 58778ea..2f17aa6 100644
--- a/src/opengl/qpaintengine_opengl.cpp
+++ b/src/opengl/qpaintengine_opengl.cpp
@@ -506,12 +506,12 @@ struct QDrawQueueItem
 
 ////////// GL program cache: start
 
-typedef struct {
+struct GLProgram {
     int brush; // brush index or mask index
     int mode;  // composition mode index
     bool mask;
     GLuint program;
-} GLProgram;
+};
 
 typedef QMultiHash<const QGLContext *, GLProgram> QGLProgramHash;
 
diff --git a/src/svg/qsvghandler.cpp b/src/svg/qsvghandler.cpp
index bf19a88..c17ca7a 100644
--- a/src/svg/qsvghandler.cpp
+++ b/src/svg/qsvghandler.cpp
@@ -1282,8 +1282,39 @@ static void parseFont(QSvgNode *node,
         fontStyle->setFamily(attributes.fontFamily.toString().trimmed());
 
     if (!attributes.fontSize.isEmpty() && attributes.fontSize != QT_INHERIT) {
+        // TODO: Support relative sizes 'larger' and 'smaller'.
         QSvgHandler::LengthType dummy; // should always be pixel size
-        fontStyle->setSize(parseLength(attributes.fontSize.toString(), dummy, handler));
+        qreal size = 0;
+        static const qreal sizeTable[] = { qreal(6.9), qreal(8.3), qreal(10.0), qreal(12.0), qreal(14.4), qreal(17.3), qreal(20.7) };
+        enum AbsFontSize { XXSmall, XSmall, Small, Medium, Large, XLarge, XXLarge };
+        switch (attributes.fontSize.at(0).unicode()) {
+        case 'x':
+            if (attributes.fontSize == QLatin1String("xx-small"))
+                size = sizeTable[XXSmall];
+            else if (attributes.fontSize == QLatin1String("x-small"))
+                size = sizeTable[XSmall];
+            else if (attributes.fontSize == QLatin1String("x-large"))
+                size = sizeTable[XLarge];
+            else if (attributes.fontSize == QLatin1String("xx-large"))
+                size = sizeTable[XXLarge];
+            break;
+        case 's':
+            if (attributes.fontSize == QLatin1String("small"))
+                size = sizeTable[Small];
+            break;
+        case 'm':
+            if (attributes.fontSize == QLatin1String("medium"))
+                size = sizeTable[Medium];
+            break;
+        case 'l':
+            if (attributes.fontSize == QLatin1String("large"))
+                size = sizeTable[Large];
+            break;
+        default:
+            size = parseLength(attributes.fontSize.toString(), dummy, handler);
+            break;
+        }
+        fontStyle->setSize(size);
     }
 
     if (!attributes.fontStyle.isEmpty() && attributes.fontStyle != QT_INHERIT) {