Merge branch '4.6' of scm.dev.nokia.troll.no:qt/oslo-staging-2 into 4.6

96 files changed, 2043 insertions, 754 deletions

diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/JavaScriptCore.pri b/src/3rdparty/javascriptcore/JavaScriptCore/JavaScriptCore.pri
index 28328e7..a6fb2f8 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/JavaScriptCore.pri
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/JavaScriptCore.pri
@@ -39,10 +39,12 @@ win32-* {
 contains(JAVASCRIPTCORE_JIT,yes) {
     DEFINES+=ENABLE_JIT=1
     DEFINES+=ENABLE_YARR_JIT=1
+    DEFINES+=ENABLE_YARR=1
 }
 contains(JAVASCRIPTCORE_JIT,no) {
     DEFINES+=ENABLE_JIT=0
     DEFINES+=ENABLE_YARR_JIT=0
+    DEFINES+=ENABLE_YARR=0
 }
 
 # In debug mode JIT disabled until crash fixed
diff --git a/src/3rdparty/webkit/ChangeLog b/src/3rdparty/webkit/ChangeLog
index 26dbaf7..1e89d1e 100644
--- a/src/3rdparty/webkit/ChangeLog
+++ b/src/3rdparty/webkit/ChangeLog
@@ -1,3 +1,13 @@
+2009-11-30  Jan-Arve Sæther  <jan-arve.saether@nokia.com>
+
+        Reviewed by Simon Hausmann.
+
+        [Qt] Fix compilation with win32-icc
+
+        Include os-win32 for stdint.h since MS does not ship that in their PSDK.
+
+        * WebKit.pri:
+
 2009-10-30  Adam Barth  <abarth@webkit.org>
 
         Reviewed by Mark Rowe.
diff --git a/src/3rdparty/webkit/JavaScriptCore/ChangeLog b/src/3rdparty/webkit/JavaScriptCore/ChangeLog
index 382a8c7..d7d2d57 100644
--- a/src/3rdparty/webkit/JavaScriptCore/ChangeLog
+++ b/src/3rdparty/webkit/JavaScriptCore/ChangeLog
@@ -1,3 +1,39 @@
+2009-11-30  Jan-Arve Sæther  <jan-arve.saether@nokia.com>
+
+        Reviewed by Simon Hausmann.
+
+        [Qt] Fix compilation with win32-icc
+
+        The Intel compiler does not support the __has_trivial_constructor type
+        trait.  The Intel Compiler can report itself as _MSC_VER >= 1400. The
+        reason for that is that the Intel Compiler depends on the Microsoft
+        Platform SDK, and in order to try to be "fully" MS compatible it will
+        "pretend" to be the same MS compiler as was shipped with the MS PSDK.
+        (Thus, compiling with win32-icc with VC8 SDK will make the source code
+        "think" the compiler at hand supports this type trait).
+
+        * wtf/TypeTraits.h:
+
+2009-11-28  Laszlo Gombos  <laszlo.1.gombos@nokia.com>
+
+        Reviewed by Eric Seidel.
+
+        Apply workaround for the limitation of VirtualFree with MEM_RELEASE to all ports running on Windows
+        https://bugs.webkit.org/show_bug.cgi?id=31943
+
+        * runtime/MarkStack.h:
+        (JSC::MarkStack::MarkStackArray::shrinkAllocation):
+
+2009-11-18  Gabor Loki  <loki@inf.u-szeged.hu>
+
+        Reviewed by Darin Adler.
+
+        Fix the clobber list of cacheFlush for ARM and Thumb2 on Linux
+        https://bugs.webkit.org/show_bug.cgi?id=31631
+
+        * jit/ExecutableAllocator.h:
+        (JSC::ExecutableAllocator::cacheFlush):
+
 2009-11-23  Laszlo Gombos  <laszlo.1.gombos@nokia.com>
 
         Reviewed by Kenneth Rohde Christiansen.
diff --git a/src/3rdparty/webkit/JavaScriptCore/jit/ExecutableAllocator.h b/src/3rdparty/webkit/JavaScriptCore/jit/ExecutableAllocator.h
index 5c43eeb..9ca62c8 100644
--- a/src/3rdparty/webkit/JavaScriptCore/jit/ExecutableAllocator.h
+++ b/src/3rdparty/webkit/JavaScriptCore/jit/ExecutableAllocator.h
@@ -203,7 +203,7 @@ public:
             "pop     {r7}\n"
             :
             : "r" (code), "r" (reinterpret_cast<char*>(code) + size)
-            : "r0", "r1");
+            : "r0", "r1", "r2");
     }
 #elif PLATFORM(SYMBIAN)
     static void cacheFlush(void* code, size_t size)
@@ -224,7 +224,7 @@ public:
             "pop     {r7}\n"
             :
             : "r" (code), "r" (reinterpret_cast<char*>(code) + size)
-            : "r0", "r1");
+            : "r0", "r1", "r2");
     }
 #else
     #error "The cacheFlush support is missing on this platform."
diff --git a/src/3rdparty/webkit/JavaScriptCore/runtime/MarkStack.h b/src/3rdparty/webkit/JavaScriptCore/runtime/MarkStack.h
index ea09f54..a114ae0 100644
--- a/src/3rdparty/webkit/JavaScriptCore/runtime/MarkStack.h
+++ b/src/3rdparty/webkit/JavaScriptCore/runtime/MarkStack.h
@@ -153,7 +153,7 @@ namespace JSC {
                 ASSERT(0 == (size % MarkStack::pageSize()));
                 if (size == m_allocated)
                     return;
-#if PLATFORM(WIN) || PLATFORM(SYMBIAN)
+#if PLATFORM(WIN_OS) || PLATFORM(SYMBIAN)
                 // We cannot release a part of a region with VirtualFree.  To get around this,
                 // we'll release the entire region and reallocate the size that we want.
                 releaseStack(m_data, m_allocated);
diff --git a/src/3rdparty/webkit/VERSION b/src/3rdparty/webkit/VERSION
index 5818e83..62acbdf 100644
--- a/src/3rdparty/webkit/VERSION
+++ b/src/3rdparty/webkit/VERSION
@@ -8,4 +8,4 @@ The commit imported was from the
 
 and has the sha1 checksum
 
-        efa69b6181ce5c045097351cdcf6c158da3f4888
+        9de63cde0ac8aa08e207d4ffce2846df1a44a364
diff --git a/src/3rdparty/webkit/WebCore/ChangeLog b/src/3rdparty/webkit/WebCore/ChangeLog
index 9644470..4f6146f 100644
--- a/src/3rdparty/webkit/WebCore/ChangeLog
+++ b/src/3rdparty/webkit/WebCore/ChangeLog
@@ -1,3 +1,44 @@
+2009-11-23  Simon Hausmann  <simon.hausmann@nokia.com>
+
+        Reviewed by Kenneth Rohde Christiansen.
+
+        [Qt] Wrong runtime instance objects of wrapped QObjects may be used if
+        the wrapped object died before the gc removed the instance.
+
+        https://bugs.webkit.org/show_bug.cgi?id=31681
+
+        Before using a cached instance, verify that its wrapped QObject is
+        still alive.
+
+        * bridge/qt/qt_instance.cpp:
+        (JSC::Bindings::QtInstance::getQtInstance):
+        * bridge/qt/qt_instance.h:
+        (JSC::Bindings::QtInstance::hashKey):
+
+2009-11-25  Jocelyn Turcotte  <jocelyn.turcotte@nokia.com>
+
+        Reviewed by Simon Hausmann.
+
+        [Qt] Fix crash of QtWebKit on any page with Flash when compiled with MinGW.
+
+        Fix inline assembly, don't dereference the function pointer twice.
+
+        * plugins/win/PluginViewWin.cpp:
+        (WebCore::PluginView::hookedBeginPaint):
+        (WebCore::PluginView::hookedEndPaint):
+
+2009-11-22  Jakub Wieczorek  <faw217@gmail.com>
+
+        Reviewed by Adam Barth.
+
+        [Qt] Remove the Referer header when redirecting to a non-secure site
+        https://bugs.webkit.org/show_bug.cgi?id=31785
+
+        This makes Qt pass two tests introduced in r50226.
+
+        * platform/network/qt/QNetworkReplyHandler.cpp:
+        (WebCore::QNetworkReplyHandler::sendResponseIfNeeded):
+
 2009-11-19  Olivier Goffart  <ogoffart@trolltech.com>
 
         Reviewed by Simon Hausmann.
diff --git a/src/3rdparty/webkit/WebCore/bridge/qt/qt_instance.cpp b/src/3rdparty/webkit/WebCore/bridge/qt/qt_instance.cpp
index 0546014..ec362ec 100644
--- a/src/3rdparty/webkit/WebCore/bridge/qt/qt_instance.cpp
+++ b/src/3rdparty/webkit/WebCore/bridge/qt/qt_instance.cpp
@@ -111,10 +111,17 @@ PassRefPtr<QtInstance> QtInstance::getQtInstance(QObject* o, PassRefPtr<RootObje
 {
     JSLock lock(SilenceAssertionsOnly);
 
-    foreach(QtInstance* instance, cachedInstances.values(o)) {
-        if (instance->rootObject() == rootObject)
-            return instance;
-    }
+    foreach(QtInstance* instance, cachedInstances.values(o))
+        if (instance->rootObject() == rootObject) {
+            // The garbage collector removes instances, but it may happen that the wrapped
+            // QObject dies before the gc kicks in. To handle that case we have to do an additional
+            // check if to see if the instance's wrapped object is still alive. If it isn't, then
+            // we have to create a new wrapper.
+            if (!instance->getObject())
+                cachedInstances.remove(instance->hashKey());
+            else
+                return instance;
+        }
 
     RefPtr<QtInstance> ret = QtInstance::create(o, rootObject, ownership);
     cachedInstances.insert(o, ret.get());
diff --git a/src/3rdparty/webkit/WebCore/bridge/qt/qt_instance.h b/src/3rdparty/webkit/WebCore/bridge/qt/qt_instance.h
index 00aaa5b..0afc6c7 100644
--- a/src/3rdparty/webkit/WebCore/bridge/qt/qt_instance.h
+++ b/src/3rdparty/webkit/WebCore/bridge/qt/qt_instance.h
@@ -59,6 +59,7 @@ public:
     JSValue booleanValue() const;
 
     QObject* getObject() const { return m_object; }
+    QObject* hashKey() const { return m_hashkey; }
 
     static PassRefPtr<QtInstance> getQtInstance(QObject*, PassRefPtr<RootObject>, QScriptEngine::ValueOwnership ownership);
 
diff --git a/src/3rdparty/webkit/WebCore/platform/network/qt/QNetworkReplyHandler.cpp b/src/3rdparty/webkit/WebCore/platform/network/qt/QNetworkReplyHandler.cpp
index 2f4722f..1ac80f6 100644
--- a/src/3rdparty/webkit/WebCore/platform/network/qt/QNetworkReplyHandler.cpp
+++ b/src/3rdparty/webkit/WebCore/platform/network/qt/QNetworkReplyHandler.cpp
@@ -325,6 +325,10 @@ void QNetworkReplyHandler::sendResponseIfNeeded()
             newRequest.setHTTPMethod("GET");
         }
 
+        // Should not set Referer after a redirect from a secure resource to non-secure one.
+        if (!newRequest.url().protocolIs("https") && protocolIs(newRequest.httpReferrer(), "https"))
+            newRequest.clearHTTPReferrer();
+
         client->willSendRequest(m_resourceHandle, newRequest, response);
         m_redirected = true;
         m_request = newRequest.toNetworkRequest(m_resourceHandle->getInternal()->m_frame);
diff --git a/src/3rdparty/webkit/WebKit/qt/Api/qwebelement.cpp b/src/3rdparty/webkit/WebKit/qt/Api/qwebelement.cpp
index 8922150..441bec7 100644
--- a/src/3rdparty/webkit/WebKit/qt/Api/qwebelement.cpp
+++ b/src/3rdparty/webkit/WebKit/qt/Api/qwebelement.cpp
@@ -99,6 +99,14 @@ public:
     It is possible to replace the contents of child elements using
     setPlainText() and setInnerXml(). To replace the element itself and its
     contents, use setOuterXml().
+
+    \section1 Examples
+
+    The \l{DOM Traversal Example} shows one way to traverse documents in a running
+    example.
+
+    The \l{Simple Selector Example} can be used to experiment with the searching
+    features of this class and provides sample code you can start working with.
 */
 
 /*!
@@ -195,8 +203,7 @@ bool QWebElement::isNull() const
     \a selectorQuery. If there are no matching elements, an empty list is
     returned.
 
-    \l{http://www.w3.org/TR/REC-CSS2/selector.html#q1}{Standard CSS2 selector}
-    syntax is used for the query.
+    \l{Standard CSS2 selector} syntax is used for the query.
 
     \note This search is performed recursively.
 
@@ -211,8 +218,7 @@ QWebElementCollection QWebElement::findAll(const QString &selectorQuery) const
     Returns the first child element that matches the given CSS selector
     \a selectorQuery.
 
-    \l{http://www.w3.org/TR/REC-CSS2/selector.html#q1}{Standard CSS2 selector}
-    syntax is used for the query.
+    \l{Standard CSS2 selector} syntax is used for the query.
 
     \note This search is performed recursively.
 
diff --git a/src/3rdparty/webkit/WebKit/qt/Api/qwebpage.cpp b/src/3rdparty/webkit/WebKit/qt/Api/qwebpage.cpp
index aedf95a..1bdc3ed 100644
--- a/src/3rdparty/webkit/WebKit/qt/Api/qwebpage.cpp
+++ b/src/3rdparty/webkit/WebKit/qt/Api/qwebpage.cpp
@@ -864,7 +864,12 @@ void QWebPagePrivate::mouseReleaseEvent(QGraphicsSceneMouseEvent* ev)
 void QWebPagePrivate::handleSoftwareInputPanel(Qt::MouseButton button)
 {
 #if QT_VERSION >= QT_VERSION_CHECK(4, 6, 0)
+    Frame* frame = page->focusController()->focusedFrame();
+    if (!frame)
+        return;
+
     if (client && client->inputMethodEnabled()
+        && frame->document()->focusedNode()
         && button == Qt::LeftButton && qApp->autoSipEnabled()) {
         QStyle::RequestSoftwareInputPanel behavior = QStyle::RequestSoftwareInputPanel(
             client->ownerWidget()->style()->styleHint(QStyle::SH_RequestSoftwareInputPanel));
diff --git a/src/3rdparty/webkit/WebKit/qt/ChangeLog b/src/3rdparty/webkit/WebKit/qt/ChangeLog
index 2408dd4..2f0bf17 100644
--- a/src/3rdparty/webkit/WebKit/qt/ChangeLog
+++ b/src/3rdparty/webkit/WebKit/qt/ChangeLog
@@ -1,3 +1,47 @@
+2009-11-28  Simon Hausmann  <simon.hausmann@nokia.com>
+
+        Reviewed by Kenneth Rohde Christiansen.
+
+        [Qt] SoftwareInputPanelRequest event sent when clicking in newly loaded page
+
+        https://bugs.webkit.org/show_bug.cgi?id=31401
+
+        Don't set the event unless there is a focused node we can use
+        for editing afterwards.
+
+        * Api/qwebpage.cpp:
+        (QWebPagePrivate::handleSoftwareInputPanel):
+        * tests/qwebpage/tst_qwebpage.cpp:
+        (tst_QWebPage::inputMethods):
+
+2009-11-23  David Boddie  <dboddie@trolltech.com>
+
+        Reviewed by Simon Hausmann.
+
+        Updated the QWebElement documentation with links to examples and
+        external resources.
+        Fixed the project file for the webelement snippet and tidied up the
+        markers used for quoting the code.
+
+        * Api/qwebelement.cpp:
+        * docs/webkitsnippets/webelement/main.cpp:
+        (findAll):
+        * docs/webkitsnippets/webelement/webelement.pro:
+
+2009-11-23  Simon Hausmann  <simon.hausmann@nokia.com>
+
+        Reviewed by Kenneth Rohde Christiansen.
+
+        [Qt] Wrong runtime instance objects of wrapped QObjects may be used if
+        the wrapped object died before the gc removed the instance.
+
+        https://bugs.webkit.org/show_bug.cgi?id=31681
+
+        Added a unit-test to verify that wrapping a QObject with the
+        same identity as a previously but now dead object works.
+
+        * tests/qwebframe/tst_qwebframe.cpp:
+
 2009-11-19  Olivier Goffart  <ogoffart@trolltech.com>
 
         Reviewed by Simon Hausmann.
diff --git a/src/3rdparty/webkit/WebKit/qt/docs/webkitsnippets/webelement/main.cpp b/src/3rdparty/webkit/WebKit/qt/docs/webkitsnippets/webelement/main.cpp
index d437a6f..2707ffb 100644
--- a/src/3rdparty/webkit/WebKit/qt/docs/webkitsnippets/webelement/main.cpp
+++ b/src/3rdparty/webkit/WebKit/qt/docs/webkitsnippets/webelement/main.cpp
@@ -22,7 +22,6 @@
 #include <qwebview.h>
 #include <qwebframe.h>
 #include <qwebelement.h>
-#include <qdebug.h>
 
 static QWebFrame *frame;
 
@@ -53,9 +52,10 @@ static void findAll()
        </p>
     */
 
+//! [FindAll intro]
     QList<QWebElement> allSpans = document.findAll("span");
     QList<QWebElement> introSpans = document.findAll("p.intro span");
-//! [FindAll]
+//! [FindAll intro] //! [FindAll]
 }
 
 int main(int argc, char *argv[])
diff --git a/src/3rdparty/webkit/WebKit/qt/docs/webkitsnippets/webelement/webelement.pro b/src/3rdparty/webkit/WebKit/qt/docs/webkitsnippets/webelement/webelement.pro
index f9b403b..8ca4b59 100644
--- a/src/3rdparty/webkit/WebKit/qt/docs/webkitsnippets/webelement/webelement.pro
+++ b/src/3rdparty/webkit/WebKit/qt/docs/webkitsnippets/webelement/webelement.pro
@@ -1,5 +1,8 @@
 TEMPLATE = app
 CONFIG -= app_bundle
+CONFIG(QTDIR_build) {
+    QT       += webkit
+}
 SOURCES   = main.cpp
 include(../../../../../WebKit.pri)
 QMAKE_RPATHDIR = $$OUTPUT_DIR/lib $$QMAKE_RPATHDIR
diff --git a/src/3rdparty/webkit/WebKit/qt/tests/qwebframe/tst_qwebframe.cpp b/src/3rdparty/webkit/WebKit/qt/tests/qwebframe/tst_qwebframe.cpp
index d88d905..8cc7953 100644
--- a/src/3rdparty/webkit/WebKit/qt/tests/qwebframe/tst_qwebframe.cpp
+++ b/src/3rdparty/webkit/WebKit/qt/tests/qwebframe/tst_qwebframe.cpp
@@ -605,6 +605,7 @@ private slots:
     void render();
     void scrollPosition();
     void evaluateWillCauseRepaint();
+    void qObjectWrapperWithSameIdentity();
 
 private:
     QString  evalJS(const QString&s) {
@@ -2785,6 +2786,43 @@ void tst_QWebFrame::evaluateWillCauseRepaint()
     QTest::qWait(2000);
 }
 
+class TestFactory : public QObject
+{
+    Q_OBJECT
+public:
+    TestFactory()
+        : obj(0), counter(0)
+    {}
+
+    Q_INVOKABLE QObject* getNewObject()
+    {
+        delete obj;
+        obj = new QObject(this);
+        obj->setObjectName(QLatin1String("test") + QString::number(++counter));
+        return obj;
+
+    }
+
+    QObject* obj;
+    int counter;
+};
+
+void tst_QWebFrame::qObjectWrapperWithSameIdentity()
+{
+    m_view->setHtml("<script>function triggerBug() { document.getElementById('span1').innerText = test.getNewObject().objectName; }</script>"
+                    "<body><span id='span1'>test</span></body>");
+
+    QWebFrame* mainFrame = m_view->page()->mainFrame();
+    QCOMPARE(mainFrame->toPlainText(), QString("test"));
+
+    mainFrame->addToJavaScriptWindowObject("test", new TestFactory, QScriptEngine::ScriptOwnership);
+
+    mainFrame->evaluateJavaScript("triggerBug();");
+    QCOMPARE(mainFrame->toPlainText(), QString("test1"));
+
+    mainFrame->evaluateJavaScript("triggerBug();");
+    QCOMPARE(mainFrame->toPlainText(), QString("test2"));
+}
 
 QTEST_MAIN(tst_QWebFrame)
 #include "tst_qwebframe.moc"
diff --git a/src/3rdparty/webkit/WebKit/qt/tests/qwebpage/tst_qwebpage.cpp b/src/3rdparty/webkit/WebKit/qt/tests/qwebpage/tst_qwebpage.cpp
index 32002e7..ee1969d 100644
--- a/src/3rdparty/webkit/WebKit/qt/tests/qwebpage/tst_qwebpage.cpp
+++ b/src/3rdparty/webkit/WebKit/qt/tests/qwebpage/tst_qwebpage.cpp
@@ -1487,6 +1487,21 @@ void tst_QWebPage::inputMethods()
     QVERIFY(!(inputMethodHints(view) & Qt::ImhHiddenText));
 #endif
 
+    page->mainFrame()->setHtml("<html><body><p>nothing to input here");
+    viewEventSpy.clear();
+
+    QWebElement para = page->mainFrame()->findFirstElement("p");
+    {
+        QMouseEvent evpres(QEvent::MouseButtonPress, para.geometry().center(), Qt::LeftButton, Qt::NoButton, Qt::NoModifier);
+        page->event(&evpres);
+        QMouseEvent evrel(QEvent::MouseButtonRelease, para.geometry().center(), Qt::LeftButton, Qt::NoButton, Qt::NoModifier);
+        page->event(&evrel);
+    }
+
+#if QT_VERSION >= QT_VERSION_CHECK(4, 6, 0)
+    QVERIFY(!viewEventSpy.contains(QEvent::RequestSoftwareInputPanel));
+#endif
+
     delete container;
 }
 
diff --git a/src/corelib/codecs/qiconvcodec.cpp b/src/corelib/codecs/qiconvcodec.cpp
index 8c4cc82..0fb78d5 100644
--- a/src/corelib/codecs/qiconvcodec.cpp
+++ b/src/corelib/codecs/qiconvcodec.cpp
@@ -378,7 +378,7 @@ QByteArray QIconvCodec::convertFromUnicode(const QChar *uc, int len, ConverterSt
     }
 
     int invalidCount = 0;
-    do {
+    while (inBytesLeft != 0) {
         if (iconv(state->cd, inBytesPtr, &inBytesLeft, &outBytes, &outBytesLeft) == (size_t) -1) {
             if (errno == EINVAL && convState) {
                 // buffer ends in a surrogate
@@ -418,7 +418,7 @@ QByteArray QIconvCodec::convertFromUnicode(const QChar *uc, int len, ConverterSt
                 }
             }
         }
-    } while (inBytesLeft != 0);
+    }
 
     // reset to initial state
     iconv(state->cd, 0, &inBytesLeft, 0, &outBytesLeft);
diff --git a/src/corelib/global/qglobal.h b/src/corelib/global/qglobal.h
index 2e9f839..6623e0c 100644
--- a/src/corelib/global/qglobal.h
+++ b/src/corelib/global/qglobal.h
@@ -44,11 +44,11 @@
 
 #include <stddef.h>
 
-#define QT_VERSION_STR   "4.6.0"
+#define QT_VERSION_STR   "4.6.1"
 /*
    QT_VERSION is (major << 16) + (minor << 8) + patch.
 */
-#define QT_VERSION 0x040600
+#define QT_VERSION 0x040601
 /*
    can be used like #if (QT_VERSION >= QT_VERSION_CHECK(4, 4, 0))
 */
diff --git a/src/corelib/io/qfilesystemwatcher_dnotify.cpp b/src/corelib/io/qfilesystemwatcher_dnotify.cpp
index 17ac9c6..c70232c 100644
--- a/src/corelib/io/qfilesystemwatcher_dnotify.cpp
+++ b/src/corelib/io/qfilesystemwatcher_dnotify.cpp
@@ -269,8 +269,11 @@ QStringList QDnotifyFileSystemWatcherEngine::addPaths(const QStringList &paths,
                 }
             }
 
-            fd = ::dirfd(d);
-            int parentFd = parent?::dirfd(parent):0;
+            fd = qt_safe_dup(::dirfd(d));
+            int parentFd = parent ? qt_safe_dup(::dirfd(parent)) : 0;
+
+            ::closedir(d);
+            if(parent) ::closedir(parent);
 
             Q_ASSERT(fd);
             if(::fcntl(fd, F_SETSIG, SIGIO) ||
@@ -279,10 +282,6 @@ QStringList QDnotifyFileSystemWatcherEngine::addPaths(const QStringList &paths,
                (parent && ::fcntl(parentFd, F_SETSIG, SIGIO)) ||
                (parent && ::fcntl(parentFd, F_NOTIFY, DN_DELETE | DN_RENAME |
                                             DN_MULTISHOT))) {
-
-                ::closedir(d);
-                if(parent) ::closedir(parent);
-
                 continue; // Could not set appropriate flags
             }
 
diff --git a/src/corelib/io/qfsfileengine.cpp b/src/corelib/io/qfsfileengine.cpp
index 3cf9b7e..37b0ea1 100644
--- a/src/corelib/io/qfsfileengine.cpp
+++ b/src/corelib/io/qfsfileengine.cpp
@@ -55,6 +55,7 @@
 #include "private/qcore_unix_p.h"
 #endif
 #include <stdio.h>
+#include <stdlib.h>
 
 QT_BEGIN_NAMESPACE
 
@@ -137,6 +138,21 @@ QString QFSFileEnginePrivate::canonicalized(const QString &path)
     if (path.isEmpty())
         return path;
 
+    // FIXME let's see if this stuff works, then we might be able to remove some of the other code.
+#if defined(Q_OS_UNIX) && !defined(Q_OS_SYMBIAN)
+    if (path.size() == 1 && path.at(0) == QLatin1Char('/'))
+        return path;
+#endif
+    // Mac OS X 10.5.x doesn't support the realpath(X,0) extenstion we use here.
+#if (defined(Q_OS_UNIX) && !defined(Q_OS_MAC)) || defined(Q_OS_SYMBIAN)
+    char *ret = realpath(path.toLocal8Bit().constData(), (char*)0);
+    if (ret) {
+        QString canonicalPath = QDir::cleanPath(QString::fromLocal8Bit(ret));
+        free(ret);
+        return canonicalPath;
+    }
+#endif
+
     QFileInfo fi;
     const QChar slash(QLatin1Char('/'));
     QString tmpPath = path;
diff --git a/src/corelib/io/qfsfileengine_p.h b/src/corelib/io/qfsfileengine_p.h
index 87f0737..41a6a1b 100644
--- a/src/corelib/io/qfsfileengine_p.h
+++ b/src/corelib/io/qfsfileengine_p.h
@@ -66,7 +66,7 @@ QT_BEGIN_NAMESPACE
 #define Q_USE_DEPRECATED_MAP_API 1
 #endif
 
-class QFSFileEnginePrivate : public QAbstractFileEnginePrivate
+class Q_AUTOTEST_EXPORT QFSFileEnginePrivate : public QAbstractFileEnginePrivate
 {
     Q_DECLARE_PUBLIC(QFSFileEngine)
 
diff --git a/src/corelib/io/qfsfileengine_unix.cpp b/src/corelib/io/qfsfileengine_unix.cpp
index 8cbf6a3..71414ce 100644
--- a/src/corelib/io/qfsfileengine_unix.cpp
+++ b/src/corelib/io/qfsfileengine_unix.cpp
@@ -191,12 +191,16 @@ bool QFSFileEnginePrivate::nativeOpen(QIODevice::OpenMode openMode)
             return false;
         }
 
-        QT_STATBUF statBuf;
-        if (QT_FSTAT(fd, &statBuf) != -1) {
-            if ((statBuf.st_mode & S_IFMT) == S_IFDIR) {
-                q->setError(QFile::OpenError, QLatin1String("file to open is a directory"));
-                QT_CLOSE(fd);
-                return false;
+        if (!(openMode & QIODevice::WriteOnly)) {
+            // we don't need this check if we tried to open for writing because then
+            // we had received EISDIR anyway.
+            QT_STATBUF statBuf;
+            if (QT_FSTAT(fd, &statBuf) != -1) {
+                if ((statBuf.st_mode & S_IFMT) == S_IFDIR) {
+                    q->setError(QFile::OpenError, QLatin1String("file to open is a directory"));
+                    QT_CLOSE(fd);
+                    return false;
+                }
             }
         }
 
@@ -230,12 +234,16 @@ bool QFSFileEnginePrivate::nativeOpen(QIODevice::OpenMode openMode)
             return false;
         }
 
-        QT_STATBUF statBuf;
-        if (QT_FSTAT(fileno(fh), &statBuf) != -1) {
-            if ((statBuf.st_mode & S_IFMT) == S_IFDIR) {
-                q->setError(QFile::OpenError, QLatin1String("file to open is a directory"));
-                fclose(fh);
-                return false;
+        if (!(openMode & QIODevice::WriteOnly)) {
+            // we don't need this check if we tried to open for writing because then
+            // we had received EISDIR anyway.
+            QT_STATBUF statBuf;
+            if (QT_FSTAT(fileno(fh), &statBuf) != -1) {
+                if ((statBuf.st_mode & S_IFMT) == S_IFDIR) {
+                    q->setError(QFile::OpenError, QLatin1String("file to open is a directory"));
+                    fclose(fh);
+                    return false;
+                }
             }
         }
 
diff --git a/src/corelib/kernel/qeventdispatcher_win.cpp b/src/corelib/kernel/qeventdispatcher_win.cpp
index b197b9d..c6eef5e 100644
--- a/src/corelib/kernel/qeventdispatcher_win.cpp
+++ b/src/corelib/kernel/qeventdispatcher_win.cpp
@@ -336,6 +336,7 @@ public:
 
     // internal window handle used for socketnotifiers/timers/etc
     HWND internalHwnd;
+    HHOOK getMessageHook;
 
     // for controlling when to send posted events
     QAtomicInt serialNumber;
@@ -363,7 +364,7 @@ public:
 };
 
 QEventDispatcherWin32Private::QEventDispatcherWin32Private()
-    : threadId(GetCurrentThreadId()), interrupt(false), internalHwnd(0), serialNumber(0), lastSerialNumber(0), wakeUps(0)
+    : threadId(GetCurrentThreadId()), interrupt(false), internalHwnd(0), getMessageHook(0), serialNumber(0), lastSerialNumber(0), wakeUps(0)
 {
     resolveTimerAPI();
 }
@@ -471,37 +472,11 @@ LRESULT CALLBACK qt_internal_proc(HWND hwnd, UINT message, WPARAM wp, LPARAM lp)
         }
         return 0;
     } else if (message == WM_TIMER) {    
-        if (wp == SendPostedEventsTimerId) {
-            KillTimer(d->internalHwnd, wp);
-            int localSerialNumber = d->serialNumber;
-            (void) d->wakeUps.fetchAndStoreRelease(0);
-            if (localSerialNumber != d->lastSerialNumber) {
-                PostMessage(d->internalHwnd, WM_QT_SENDPOSTEDEVENTS, 0, 0);
-            }
-        } else {
-            Q_ASSERT(d != 0);
-            d->sendTimerEvent(wp);
-        }
+        Q_ASSERT(d != 0);
+        d->sendTimerEvent(wp);
         return 0;
     } else if (message == WM_QT_SENDPOSTEDEVENTS) {
         int localSerialNumber = d->serialNumber;
-
-        if (GetQueueStatus(QS_INPUT | QS_RAWINPUT | QS_TIMER) != 0) {
-            // delay the next pass of sendPostedEvents() until we get the special
-            // WM_TIMER, which allows all pending Windows messages to be processed
-            if (SetTimer(d->internalHwnd, SendPostedEventsTimerId, 0, 0) == 0) {
-                // failed to start the timer, oops, clear wakeUps in an attempt to keep things running
-                qErrnoWarning("Qt: INTERNAL ERROR: failed to start sendPostedEvents() timer");
-                d->wakeUps.fetchAndStoreRelease(0);
-            } else {
-                // SetTimer() succeeded, nothing to do now
-                ;
-            }
-        } else {
-            // nothing pending in the queue, let sendPostedEvents go through
-            d->wakeUps.fetchAndStoreRelease(0);
-        }
-
         if (localSerialNumber != d->lastSerialNumber) {
             d->lastSerialNumber = localSerialNumber;
             QCoreApplicationPrivate::sendPostedEvents(0, 0, d->threadData);
@@ -512,6 +487,31 @@ LRESULT CALLBACK qt_internal_proc(HWND hwnd, UINT message, WPARAM wp, LPARAM lp)
     return DefWindowProc(hwnd, message, wp, lp);
 }
 
+LRESULT CALLBACK qt_GetMessageHook(int code, WPARAM wp, LPARAM lp)
+{
+    if (wp == PM_REMOVE) {
+        QEventDispatcherWin32 *q = qobject_cast<QEventDispatcherWin32 *>(QAbstractEventDispatcher::instance());
+        Q_ASSERT(q != 0);
+        if (q) {
+            QEventDispatcherWin32Private *d = q->d_func();
+            int localSerialNumber = d->serialNumber;
+            if (HIWORD(GetQueueStatus(QS_INPUT | QS_RAWINPUT | QS_TIMER)) == 0) {
+                // no more input or timer events in the message queue, we can allow posted events to be
+                // sent now
+                (void) d->wakeUps.fetchAndStoreRelease(0);
+                MSG *msg = (MSG *) lp;
+                if (localSerialNumber != d->lastSerialNumber
+                    // if this message IS the one that triggers sendPostedEvents(), no need to post it again
+                    && msg->hwnd != d->internalHwnd
+                    && msg->message != WM_QT_SENDPOSTEDEVENTS) {
+                    PostMessage(d->internalHwnd, WM_QT_SENDPOSTEDEVENTS, 0, 0);
+                }
+            }
+        }
+    }
+    return CallNextHookEx(0, code, wp, lp);
+}
+
 static HWND qt_create_internal_window(const QEventDispatcherWin32 *eventDispatcher)
 {
     // make sure that multiple Qt's can coexist in the same process
@@ -636,6 +636,12 @@ void QEventDispatcherWin32::createInternalHwnd()
         return;
     d->internalHwnd = qt_create_internal_window(this);
 
+    // setup GetMessage hook needed to drive our posted events
+    d->getMessageHook = SetWindowsHookEx(WH_GETMESSAGE, (HOOKPROC) qt_GetMessageHook, NULL, GetCurrentThreadId());
+    if (!d->getMessageHook) {
+        qFatal("Qt: INTERNALL ERROR: failed to install GetMessage hook");
+    }
+
     // register all socket notifiers
     QList<int> sockets = (d->sn_read.keys().toSet()
                           + d->sn_write.keys().toSet()
@@ -1058,6 +1064,10 @@ void QEventDispatcherWin32::closingDown()
         d->unregisterTimer(d->timerVec.at(i), true);
     d->timerVec.clear();
     d->timerDict.clear();
+
+    if (d->getMessageHook)
+        UnhookWindowsHookEx(d->getMessageHook);
+    d->getMessageHook = 0;
 }
 
 bool QEventDispatcherWin32::event(QEvent *e)
diff --git a/src/corelib/kernel/qeventdispatcher_win_p.h b/src/corelib/kernel/qeventdispatcher_win_p.h
index a5ef4d4..7f0e87d 100644
--- a/src/corelib/kernel/qeventdispatcher_win_p.h
+++ b/src/corelib/kernel/qeventdispatcher_win_p.h
@@ -102,6 +102,7 @@ public:
 
 private:
     friend LRESULT CALLBACK qt_internal_proc(HWND hwnd, UINT message, WPARAM wp, LPARAM lp);
+    friend LRESULT CALLBACK qt_GetMessageHook(int, WPARAM, LPARAM);
 };
 
 QT_END_NAMESPACE
diff --git a/src/corelib/kernel/qmath.h b/src/corelib/kernel/qmath.h
index a9e4378..820f424 100644
--- a/src/corelib/kernel/qmath.h
+++ b/src/corelib/kernel/qmath.h
@@ -76,6 +76,16 @@ inline int qFloor(qreal v)
         return int(floor(v));
 }
 
+inline qreal qFabs(qreal v)
+{
+#ifdef QT_USE_MATH_H_FLOATS
+    if(sizeof(qreal) == sizeof(float))
+        return fabsf(float(v));
+    else
+#endif
+        return fabs(v);
+}
+
 inline qreal qSin(qreal v)
 {
 #ifdef QT_USE_MATH_H_FLOATS
@@ -96,6 +106,16 @@ inline qreal qCos(qreal v)
         return cos(v);
 }
 
+inline qreal qTan(qreal v)
+{
+#ifdef QT_USE_MATH_H_FLOATS
+    if (sizeof(qreal) == sizeof(float))
+        return tanf(float(v));
+    else
+#endif
+        return tan(v);
+}
+
 inline qreal qAcos(qreal v)
 {
 #ifdef QT_USE_MATH_H_FLOATS
@@ -106,6 +126,36 @@ inline qreal qAcos(qreal v)
         return acos(v);
 }
 
+inline qreal qAsin(qreal v)
+{
+#ifdef QT_USE_MATH_H_FLOATS
+    if (sizeof(qreal) == sizeof(float))
+        return asinf(float(v));
+    else
+#endif
+        return asin(v);
+}
+
+inline qreal qAtan(qreal v)
+{
+#ifdef QT_USE_MATH_H_FLOATS
+    if(sizeof(qreal) == sizeof(float))
+        return atanf(float(v));
+    else
+#endif
+        return atan(v);
+}
+
+inline qreal qAtan2(qreal x, qreal y)
+{
+#ifdef QT_USE_MATH_H_FLOATS
+    if(sizeof(qreal) == sizeof(float))
+        return atan2f(float(x), float(y));
+    else
+#endif
+        return atan2(x, y);
+}
+
 inline qreal qSqrt(qreal v)
 {
 #ifdef QT_USE_MATH_H_FLOATS
@@ -126,6 +176,13 @@ inline qreal qLn(qreal v)
         return log(v);
 }
 
+inline qreal qExp(qreal v)
+{
+    // only one signature
+    // exists, exp(double)
+    return exp(v);
+}
+
 inline qreal qPow(qreal x, qreal y)
 {
 #ifdef QT_USE_MATH_H_FLOATS
diff --git a/src/corelib/kernel/qobject.cpp b/src/corelib/kernel/qobject.cpp
index 4321c59..30cd011 100644
--- a/src/corelib/kernel/qobject.cpp
+++ b/src/corelib/kernel/qobject.cpp
@@ -153,15 +153,6 @@ QObjectPrivate::QObjectPrivate(int version)
     hasGuards = false;
 }
 
-#ifdef Q_CC_INTEL
-/* Workaround for a bug in win32-icc where it seems to inline ~QObjectPrivate too aggressive.
-   When icc compiles QtGui, it inlines ~QObjectPrivate so that it would generate a call to
-  ~QObjectData. However, ~QObjectData is not exported from QtCore, so it does not link.
-  See also QTBUG-5145 for info on how this manifested itself.
- */
-# pragma auto_inline(off)
-#endif
-
 QObjectPrivate::~QObjectPrivate()
 {
     delete static_cast<QAbstractDynamicMetaObject*>(metaObject);
@@ -173,9 +164,6 @@ QObjectPrivate::~QObjectPrivate()
     delete extraData;
 #endif
 }
-#ifdef Q_CC_INTEL
-# pragma auto_inline(on)
-#endif
 
 
 int *QObjectPrivate::setDeleteWatch(QObjectPrivate *d, int *w) {
diff --git a/src/corelib/kernel/qobject.h b/src/corelib/kernel/qobject.h
index 340498f..1a178e2 100644
--- a/src/corelib/kernel/qobject.h
+++ b/src/corelib/kernel/qobject.h
@@ -91,7 +91,11 @@ template<typename T> inline QList<T> qFindChildren(const QObject *, const QRegEx
 # endif
 #endif
 
-class QObjectData {
+class
+#if defined(__INTEL_COMPILER) && defined(Q_OS_WIN)
+Q_CORE_EXPORT
+#endif
+QObjectData {
 public:
     virtual ~QObjectData() = 0;
     QObject *q_ptr;
diff --git a/src/corelib/tools/qvector.h b/src/corelib/tools/qvector.h
index f0de98d..e00cf3f 100644
--- a/src/corelib/tools/qvector.h
+++ b/src/corelib/tools/qvector.h
@@ -219,7 +219,7 @@ public:
         inline const_iterator &operator--() { i--; return *this; }
         inline const_iterator operator--(int) { T *n = i; i--; return n; }
         inline const_iterator &operator+=(int j) { i+=j; return *this; }
-        inline const_iterator &operator-=(int j) { i+=j; return *this; }
+        inline const_iterator &operator-=(int j) { i-=j; return *this; }
         inline const_iterator operator+(int j) const { return const_iterator(i+j); }
         inline const_iterator operator-(int j) const { return const_iterator(i-j); }
         inline int operator-(const_iterator j) const { return i - j.i; }
@@ -324,7 +324,7 @@ void QVector<T>::detach_helper()
 { realloc(d->size, d->alloc); }
 template <typename T>
 void QVector<T>::reserve(int asize)
-{ if (asize > d->alloc || d->ref != 1) realloc(d->size, asize); d->capacity = 1; }
+{ if (asize > d->alloc) realloc(d->size, asize); if (d->ref == 1) d->capacity = 1; }
 template <typename T>
 void QVector<T>::resize(int asize)
 { realloc(asize, (asize > d->alloc || (!d->capacity && asize < d->size && asize < (d->alloc >> 1))) ?
@@ -441,6 +441,7 @@ void QVector<T>::free(Data *x)
 template <typename T>
 void QVector<T>::realloc(int asize, int aalloc)
 {
+    Q_ASSERT(asize <= aalloc);
     T *pOld;
     T *pNew;
     union { QVectorData *d; Data *p; } x;
@@ -496,7 +497,8 @@ void QVector<T>::realloc(int asize, int aalloc)
             pOld = p->array + x.d->size;
             pNew = x.p->array + x.d->size;
             // copy objects from the old array into the new array
-            while (x.d->size < qMin(asize, d->size)) {
+            const int toMove = qMin(asize, d->size);
+            while (x.d->size < toMove) {
                 new (pNew++) T(*pOld++);
                 x.d->size++;
             }
diff --git a/src/gui/dialogs/qprogressdialog.cpp b/src/gui/dialogs/qprogressdialog.cpp
index f5024bb..98b15e9 100644
--- a/src/gui/dialogs/qprogressdialog.cpp
+++ b/src/gui/dialogs/qprogressdialog.cpp
@@ -424,10 +424,6 @@ void QProgressDialog::setCancelButton(QPushButton *cancelButton)
 {
     Q_D(QProgressDialog);
     delete d->cancel;
-#ifdef QT_SOFTKEYS_ENABLED
-    delete d->cancelAction;
-    d->cancelAction = 0;
-#endif
     d->cancel = cancelButton;
     if (cancelButton) {
         if (cancelButton->parentWidget() == this) {
diff --git a/src/gui/egl/qegl.cpp b/src/gui/egl/qegl.cpp
index cf28dc4..6ee4bfc 100644
--- a/src/gui/egl/qegl.cpp
+++ b/src/gui/egl/qegl.cpp
@@ -429,7 +429,10 @@ QString QEglContext::extensions()
 
 bool QEglContext::hasExtension(const char* extensionName)
 {
-    return extensions().contains(QLatin1String(extensionName));
+    QList<QByteArray> extensions =
+        QByteArray(reinterpret_cast<const char *>
+            (eglQueryString(QEglContext::defaultDisplay(0), EGL_EXTENSIONS))).split(' ');
+    return extensions.contains(extensionName);
 }
 
 QEglContext *QEglContext::currentContext(QEgl::API api)
diff --git a/src/gui/egl/qeglproperties.cpp b/src/gui/egl/qeglproperties.cpp
index 2d37edb..4d4410a 100644
--- a/src/gui/egl/qeglproperties.cpp
+++ b/src/gui/egl/qeglproperties.cpp
@@ -229,6 +229,15 @@ void QEglProperties::setRenderableType(QEgl::API api)
 // reductions in complexity are possible.
 bool QEglProperties::reduceConfiguration()
 {
+    // EGL chooses configs with the highest color depth over
+    // those with smaller (but faster) lower color depths. One
+    // way around this is to set EGL_BUFFER_SIZE to 16, which
+    // trumps the others. Of course, there may not be a 16-bit
+    // config avaliable, so it's the first restraint we remove.
+    if (value(EGL_BUFFER_SIZE) == 16) {
+        removeValue(EGL_BUFFER_SIZE);
+        return true;
+    }
     if (removeValue(EGL_SAMPLE_BUFFERS)) {
         removeValue(EGL_SAMPLES);
         return true;
diff --git a/src/gui/graphicsview/qgraph_p.h b/src/gui/graphicsview/qgraph_p.h
index 0a2bf27..076b8fa 100644
--- a/src/gui/graphicsview/qgraph_p.h
+++ b/src/gui/graphicsview/qgraph_p.h
@@ -236,11 +236,13 @@ public:
                 EdgeData *data = edgeData(v, v1);
                 bool forward = data->from == v;
                 if (forward) {
-                    edges += QString::fromAscii("\"%1\"->\"%2\" [label=\"[%3,%4,%5]\" dir=both color=\"#000000:#a0a0a0\"] \n")
+                    edges += QString::fromAscii("\"%1\"->\"%2\" [label=\"[%3,%4,%5,%6,%7]\" color=\"#000000\"] \n")
                         .arg(v->toString())
                         .arg(v1->toString())
                         .arg(data->minSize)
+                        .arg(data->minPrefSize)
                         .arg(data->prefSize)
+                        .arg(data->maxPrefSize)
                         .arg(data->maxSize)
                         ;
                 }
diff --git a/src/gui/graphicsview/qgraphicsanchorlayout.cpp b/src/gui/graphicsview/qgraphicsanchorlayout.cpp
index 686096c..6718a28 100644
--- a/src/gui/graphicsview/qgraphicsanchorlayout.cpp
+++ b/src/gui/graphicsview/qgraphicsanchorlayout.cpp
@@ -158,7 +158,7 @@ QGraphicsAnchor::~QGraphicsAnchor()
     \property QGraphicsAnchor::sizePolicy
     \brief the size policy for the QGraphicsAnchor.
 
-    By setting the size policy on an anchor you can configure how the item can resize itself
+    By setting the size policy on an anchor you can configure how the anchor can resize itself
     from its preferred spacing. For instance, if the anchor has the size policy
     QSizePolicy::Minimum, the spacing is the minimum size of the anchor. However, its size
     can grow up to the anchors maximum size. If the default size policy is QSizePolicy::Fixed,
@@ -247,7 +247,7 @@ QGraphicsAnchorLayout::~QGraphicsAnchorLayout()
 
 /*!
     Creates an anchor between the edge \a firstEdge of item \a firstItem and the edge \a secondEdge
-    of item \a secondItem. The magnitude of the anchor is picked up from the style. Anchors
+    of item \a secondItem. The spacing of the anchor is picked up from the style. Anchors
     between a layout edge and an item edge will have a size of 0.
     If there is already an anchor between the edges, the the new anchor will replace the old one.
 
diff --git a/src/gui/graphicsview/qgraphicsanchorlayout_p.cpp b/src/gui/graphicsview/qgraphicsanchorlayout_p.cpp
index a6f5992..03ed63d 100644
--- a/src/gui/graphicsview/qgraphicsanchorlayout_p.cpp
+++ b/src/gui/graphicsview/qgraphicsanchorlayout_p.cpp
@@ -49,20 +49,34 @@
 #endif
 
 #include "qgraphicsanchorlayout_p.h"
+
 #ifndef QT_NO_GRAPHICSVIEW
 QT_BEGIN_NAMESPACE
 
+// To ensure that all variables inside the simplex solver are non-negative,
+// we limit the size of anchors in the interval [-limit, limit]. Then before
+// sending them to the simplex solver we add "limit" as an offset, so that
+// they are actually calculated in the interval [0, 2 * limit]
+// To avoid numerical errors in platforms where we use single precision,
+// we use a tighter limit for the variables range.
+const qreal g_offset = (sizeof(qreal) == sizeof(double)) ? QWIDGETSIZE_MAX : QWIDGETSIZE_MAX / 32;
 
 QGraphicsAnchorPrivate::QGraphicsAnchorPrivate(int version)
     : QObjectPrivate(version), layoutPrivate(0), data(0),
       sizePolicy(QSizePolicy::Fixed), preferredSize(0),
-      hasSize(true), reversed(false)
+      hasSize(true)
 {
 }
 
 QGraphicsAnchorPrivate::~QGraphicsAnchorPrivate()
 {
-    layoutPrivate->removeAnchor(data->from, data->to);
+    if (data) {
+        // The QGraphicsAnchor was already deleted at this moment. We must clean
+        // the dangling pointer to avoid double deletion in the AnchorData dtor.
+        data->graphicsAnchor = 0;
+
+        layoutPrivate->removeAnchor(data->from, data->to);
+    }
 }
 
 void QGraphicsAnchorPrivate::setSizePolicy(QSizePolicy::Policy policy)
@@ -80,27 +94,12 @@ void QGraphicsAnchorPrivate::setSpacing(qreal value)
         return;
     }
 
-    const qreal rawValue = reversed ? -preferredSize : preferredSize;
-    if (hasSize && (rawValue == value))
+    if (hasSize && (preferredSize == value))
         return;
 
     // The anchor has an user-defined size
     hasSize = true;
-
-    // The simplex solver cannot handle negative sizes. To workaround that,
-    // if value is less than zero, we reverse the anchor and set the absolute
-    // value;
-    if (value >= 0) {
-        preferredSize = value;
-        if (reversed)
-            qSwap(data->from, data->to);
-        reversed = false;
-    } else {
-        preferredSize = -value;
-        if (!reversed)
-            qSwap(data->from, data->to);
-        reversed = true;
-    }
+    preferredSize = value;
 
     layoutPrivate->q_func()->invalidate();
 }
@@ -114,9 +113,6 @@ void QGraphicsAnchorPrivate::unsetSpacing()
 
     // Return to standard direction
     hasSize = false;
-    if (reversed)
-        qSwap(data->from, data->to);
-    reversed = false;
 
     layoutPrivate->q_func()->invalidate();
 }
@@ -128,14 +124,14 @@ qreal QGraphicsAnchorPrivate::spacing() const
         return 0;
     }
 
-    return reversed ? -preferredSize : preferredSize;
+    return preferredSize;
 }
 
 
-static void internalSizeHints(QSizePolicy::Policy policy,
-                              qreal minSizeHint, qreal prefSizeHint, qreal maxSizeHint,
-                              qreal *minSize, qreal *prefSize,
-                              qreal *maxSize)
+static void applySizePolicy(QSizePolicy::Policy policy,
+                            qreal minSizeHint, qreal prefSizeHint, qreal maxSizeHint,
+                            qreal *minSize, qreal *prefSize,
+                            qreal *maxSize)
 {
     // minSize, prefSize and maxSize are initialized
     // with item's preferred Size: this is QSizePolicy::Fixed.
@@ -167,6 +163,18 @@ static void internalSizeHints(QSizePolicy::Policy policy,
         *prefSize = prefSizeHint;
 }
 
+AnchorData::~AnchorData()
+{
+    if (graphicsAnchor) {
+        // Remove reference to ourself to avoid double removal in
+        // QGraphicsAnchorPrivate dtor.
+        graphicsAnchor->d_func()->data = 0;
+
+        delete graphicsAnchor;
+    }
+}
+
+
 void AnchorData::refreshSizeHints(const QLayoutStyleInfo *styleInfo)
 {
     QSizePolicy::Policy policy;
@@ -182,6 +190,9 @@ void AnchorData::refreshSizeHints(const QLayoutStyleInfo *styleInfo)
             maxSize = QWIDGETSIZE_MAX;
             if (isCenterAnchor)
                 maxSize /= 2;
+
+            minPrefSize = prefSize;
+            maxPrefSize = maxSize;
             return;
         } else {
             if (orientation == QGraphicsAnchorLayoutPrivate::Horizontal) {
@@ -206,14 +217,18 @@ void AnchorData::refreshSizeHints(const QLayoutStyleInfo *styleInfo)
         // It is a user-created anchor, fetch size information from the associated QGraphicsAnchor
         Q_ASSERT(graphicsAnchor);
         QGraphicsAnchorPrivate *anchorPrivate = graphicsAnchor->d_func();
+
+        // Policy, min and max sizes are straightforward
         policy = anchorPrivate->sizePolicy;
         minSizeHint = 0;
+        maxSizeHint = QWIDGETSIZE_MAX;
+
+        // Preferred Size
         if (anchorPrivate->hasSize) {
-            // One can only configure the preferred size of a normal anchor. Their minimum and
-            // maximum "size hints" are always 0 and QWIDGETSIZE_MAX, correspondingly. However,
-            // their effective size hints might be narrowed down due to their size policies.
+            // Anchor has user-defined size
             prefSizeHint = anchorPrivate->preferredSize;
         } else {
+            // Fetch size information from style
             const Qt::Orientation orient = Qt::Orientation(QGraphicsAnchorLayoutPrivate::edgeOrientation(from->m_edge) + 1);
             qreal s = styleInfo->defaultSpacing(orient);
             if (s < 0) {
@@ -229,10 +244,14 @@ void AnchorData::refreshSizeHints(const QLayoutStyleInfo *styleInfo)
             }
             prefSizeHint = s;
         }
-        maxSizeHint = QWIDGETSIZE_MAX;
     }
-    internalSizeHints(policy, minSizeHint, prefSizeHint, maxSizeHint,
-                      &minSize, &prefSize, &maxSize);
+
+    // Fill minSize, prefSize and maxSize based on policy and sizeHints
+    applySizePolicy(policy, minSizeHint, prefSizeHint, maxSizeHint,
+                    &minSize, &prefSize, &maxSize);
+
+    minPrefSize = prefSize;
+    maxPrefSize = maxSize;
 
     // Set the anchor effective sizes to preferred.
     //
@@ -252,13 +271,7 @@ void ParallelAnchorData::updateChildrenSizes()
     firstEdge->sizeAtPreferred = sizeAtPreferred;
     firstEdge->sizeAtMaximum = sizeAtMaximum;
 
-    // We have the convention that the first children will define the direction of the
-    // pararell group. So we can check whether the second edge is "forward" in relation
-    // to the group if it have the same direction as the first edge. Note that we don't
-    // use 'this->from' because it might be changed by vertex simplification.
-    const bool secondForward = (firstEdge->from == secondEdge->from);
-
-    if (secondForward) {
+    if (secondForward()) {
         secondEdge->sizeAtMinimum = sizeAtMinimum;
         secondEdge->sizeAtPreferred = sizeAtPreferred;
         secondEdge->sizeAtMaximum = sizeAtMaximum;
@@ -272,21 +285,40 @@ void ParallelAnchorData::updateChildrenSizes()
     secondEdge->updateChildrenSizes();
 }
 
-bool ParallelAnchorData::calculateSizeHints()
-{
-    // Note that parallel groups can lead to unfeasibility, so during calculation, we can
-    // find out one unfeasibility. Because of that this method return boolean. This can't
-    // happen in sequential, so there the method is void.
+/*
+  \internal
 
-    // Account for parallel anchors where the second edge is backwards.
-    // We rely on the fact that a forward anchor of sizes min, pref, max is equivalent
-    // to a backwards anchor of size (-max, -pref, -min)
+  Initialize the parallel anchor size hints using the sizeHint information from
+  its children.
 
-    // Also see comments in updateChildrenSizes().
-    const bool secondForward = (firstEdge->from == secondEdge->from);
-    const qreal secondMin = secondForward ? secondEdge->minSize : -secondEdge->maxSize;
-    const qreal secondPref = secondForward ? secondEdge->prefSize : -secondEdge->prefSize;
-    const qreal secondMax = secondForward ? secondEdge->maxSize : -secondEdge->minSize;
+  Note that parallel groups can lead to unfeasibility, so during calculation, we can
+  find out one unfeasibility. Because of that this method return boolean. This can't
+  happen in sequential, so there the method is void.
+ */
+bool ParallelAnchorData::calculateSizeHints()
+{
+    // Normalize second child sizes.
+    // A negative anchor of sizes min, minPref, pref, maxPref and max, is equivalent
+    // to a forward anchor of sizes -max, -maxPref, -pref, -minPref, -min
+    qreal secondMin;
+    qreal secondMinPref;
+    qreal secondPref;
+    qreal secondMaxPref;
+    qreal secondMax;
+
+    if (secondForward()) {
+        secondMin = secondEdge->minSize;
+        secondMinPref = secondEdge->minPrefSize;
+        secondPref = secondEdge->prefSize;
+        secondMaxPref = secondEdge->maxPrefSize;
+        secondMax = secondEdge->maxSize;
+    } else {
+        secondMin = -secondEdge->maxSize;
+        secondMinPref = -secondEdge->maxPrefSize;
+        secondPref = -secondEdge->prefSize;
+        secondMaxPref = -secondEdge->minPrefSize;
+        secondMax = -secondEdge->minSize;
+    }
 
     minSize = qMax(firstEdge->minSize, secondMin);
     maxSize = qMin(firstEdge->maxSize, secondMax);
@@ -298,23 +330,72 @@ bool ParallelAnchorData::calculateSizeHints()
         return false;
     }
 
-    // The equivalent preferred Size of a parallel anchor is calculated as to
-    // reduce the deviation from the original preferred sizes _and_ to avoid shrinking
-    // items below their preferred sizes, unless strictly needed.
-
-    // ### This logic only holds if all anchors in the layout are "well-behaved" in the
-    // following terms:
+    // Preferred size calculation
+    // The calculation of preferred size is done as follows:
+    //
+    // 1) Check whether one of the child anchors is the layout structural anchor
+    //    If so, we can simply copy the preferred information from the other child,
+    //    after bounding it to our minimum and maximum sizes.
+    //    If not, then we proceed with the actual calculations.
     //
-    // - There are no negative-sized anchors
-    // - All sequential anchors are composed of children in the same direction as the
-    //   sequential anchor itself
+    // 2) The whole algorithm for preferred size calculation is based on the fact
+    //    that, if a given anchor cannot remain at its preferred size, it'd rather
+    //    grow than shrink.
     //
-    // With these assumptions we can grow a child knowing that no hidden items will
-    // have to shrink as the result of that.
-    // If any of these does not hold, we have a situation where the ParallelAnchor
-    // does not have enough information to calculate its equivalent prefSize.
-    prefSize = qMax(firstEdge->prefSize, secondPref);
-    prefSize = qMin(prefSize, maxSize);
+    //    What happens though is that while this affirmative is true for simple
+    //    anchors, it may not be true for sequential anchors that have one or more
+    //    reversed anchors inside it. That happens because when a sequential anchor
+    //    grows, any reversed anchors inside it may be required to shrink, something
+    //    we try to avoid, as said above.
+    //
+    //    To overcome this, besides their actual preferred size "prefSize", each anchor
+    //    exports what we call "minPrefSize" and "maxPrefSize". These two values define
+    //    a surrounding interval where, if required to move, the anchor would rather
+    //    remain inside.
+    //
+    //    For standard anchors, this area simply represents the region between
+    //    prefSize and maxSize, which makes sense since our first affirmation.
+    //    For composed anchors, these values are calculated as to reduce the global
+    //    "damage", that is, to reduce the total deviation and the total amount of
+    //    anchors that had to shrink.
+
+    if (firstEdge->isLayoutAnchor) {
+        prefSize = qBound(minSize, secondPref, maxSize);
+        minPrefSize = qBound(minSize, secondMinPref, maxSize);
+        maxPrefSize = qBound(minSize, secondMaxPref, maxSize);
+    } else if (secondEdge->isLayoutAnchor) {
+        prefSize = qBound(minSize, firstEdge->prefSize, maxSize);
+        minPrefSize = qBound(minSize, firstEdge->minPrefSize, maxSize);
+        maxPrefSize = qBound(minSize, firstEdge->maxPrefSize, maxSize);
+    } else {
+        // Calculate the intersection between the "preferred" regions of each child
+        const qreal lowerBoundary =
+            qBound(minSize, qMax(firstEdge->minPrefSize, secondMinPref), maxSize);
+        const qreal upperBoundary =
+            qBound(minSize, qMin(firstEdge->maxPrefSize, secondMaxPref), maxSize);
+        const qreal prefMean =
+            qBound(minSize, (firstEdge->prefSize + secondPref) / 2, maxSize);
+
+        if (lowerBoundary < upperBoundary) {
+            // If there is an intersection between the two regions, this intersection
+            // will be used as the preferred region of the parallel anchor itself.
+            // The preferred size will be the bounded average between the two preferred
+            // sizes.
+            prefSize = qBound(lowerBoundary, prefMean, upperBoundary);
+            minPrefSize = lowerBoundary;
+            maxPrefSize = upperBoundary;
+        } else {
+            // If there is no intersection, we have to attribute "damage" to at least
+            // one of the children. The minimum total damage is achieved in points
+            // inside the region that extends from (1) the upper boundary of the lower
+            // region to (2) the lower boundary of the upper region.
+            // Then, we expose this region as _our_ preferred region and once again,
+            // use the bounded average as our preferred size.
+            prefSize = qBound(upperBoundary, prefMean, lowerBoundary);
+            minPrefSize = upperBoundary;
+            maxPrefSize = lowerBoundary;
+        }
+    }
 
     // See comment in AnchorData::refreshSizeHints() about sizeAt* values
     sizeAtMinimum = prefSize;
@@ -332,19 +413,28 @@ bool ParallelAnchorData::calculateSizeHints()
      1 is at Maximum
 */
 static QPair<QGraphicsAnchorLayoutPrivate::Interval, qreal> getFactor(qreal value, qreal min,
-                                                                      qreal pref, qreal max)
+                                                                      qreal minPref, qreal pref,
+                                                                      qreal maxPref, qreal max)
 {
     QGraphicsAnchorLayoutPrivate::Interval interval;
     qreal lower;
     qreal upper;
 
-    if (value < pref) {
-        interval = QGraphicsAnchorLayoutPrivate::MinToPreferred;
+    if (value < minPref) {
+        interval = QGraphicsAnchorLayoutPrivate::MinimumToMinPreferred;
         lower = min;
+        upper = minPref;
+    } else if (value < pref) {
+        interval = QGraphicsAnchorLayoutPrivate::MinPreferredToPreferred;
+        lower = minPref;
         upper = pref;
-    } else {
-        interval = QGraphicsAnchorLayoutPrivate::PreferredToMax;
+    } else if (value < maxPref) {
+        interval = QGraphicsAnchorLayoutPrivate::PreferredToMaxPreferred;
         lower = pref;
+        upper = maxPref;
+    } else {
+        interval = QGraphicsAnchorLayoutPrivate::MaxPreferredToMaximum;
+        lower = maxPref;
         upper = max;
     }
 
@@ -359,19 +449,26 @@ static QPair<QGraphicsAnchorLayoutPrivate::Interval, qreal> getFactor(qreal valu
 }
 
 static qreal interpolate(const QPair<QGraphicsAnchorLayoutPrivate::Interval, qreal> &factor,
-                         qreal min, qreal pref,
-                         qreal max)
+                         qreal min, qreal minPref, qreal pref, qreal maxPref, qreal max)
 {
     qreal lower;
     qreal upper;
 
     switch (factor.first) {
-    case QGraphicsAnchorLayoutPrivate::MinToPreferred:
+    case QGraphicsAnchorLayoutPrivate::MinimumToMinPreferred:
         lower = min;
+        upper = minPref;
+        break;
+    case QGraphicsAnchorLayoutPrivate::MinPreferredToPreferred:
+        lower = minPref;
         upper = pref;
         break;
-    case QGraphicsAnchorLayoutPrivate::PreferredToMax:
+    case QGraphicsAnchorLayoutPrivate::PreferredToMaxPreferred:
         lower = pref;
+        upper = maxPref;
+        break;
+    case QGraphicsAnchorLayoutPrivate::MaxPreferredToMaximum:
+        lower = maxPref;
         upper = max;
         break;
     }
@@ -381,34 +478,43 @@ static qreal interpolate(const QPair<QGraphicsAnchorLayoutPrivate::Interval, qre
 
 void SequentialAnchorData::updateChildrenSizes()
 {
-    // ### REMOVE ME
-    // ### check whether we are guarantee to get those or we need to warn stuff at this
-    // point.
-    Q_ASSERT(sizeAtMinimum > minSize || qAbs(sizeAtMinimum - minSize) < 0.00000001);
-    Q_ASSERT(sizeAtPreferred > minSize || qAbs(sizeAtPreferred - minSize) < 0.00000001);
-    Q_ASSERT(sizeAtMaximum > minSize || qAbs(sizeAtMaximum - minSize) < 0.00000001);
-
-    // These may be false if this anchor was in parallel with the layout stucture
-    // Q_ASSERT(sizeAtMinimum < maxSize || qAbs(sizeAtMinimum - maxSize) < 0.00000001);
-    // Q_ASSERT(sizeAtPreferred < maxSize || qAbs(sizeAtPreferred - maxSize) < 0.00000001);
-    // Q_ASSERT(sizeAtMaximum < maxSize || qAbs(sizeAtMaximum - maxSize) < 0.00000001);
-
     // Band here refers if the value is in the Minimum To Preferred
     // band (the lower band) or the Preferred To Maximum (the upper band).
 
     const QPair<QGraphicsAnchorLayoutPrivate::Interval, qreal> minFactor =
-        getFactor(sizeAtMinimum, minSize, prefSize, maxSize);
+        getFactor(sizeAtMinimum, minSize, minPrefSize, prefSize, maxPrefSize, maxSize);
     const QPair<QGraphicsAnchorLayoutPrivate::Interval, qreal> prefFactor =
-        getFactor(sizeAtPreferred, minSize, prefSize, maxSize);
+        getFactor(sizeAtPreferred, minSize, minPrefSize, prefSize, maxPrefSize, maxSize);
     const QPair<QGraphicsAnchorLayoutPrivate::Interval, qreal> maxFactor =
-        getFactor(sizeAtMaximum, minSize, prefSize, maxSize);
+        getFactor(sizeAtMaximum, minSize, minPrefSize, prefSize, maxPrefSize, maxSize);
+
+    // XXX This is not safe if Vertex simplification takes place after the sequential
+    // anchor is created. In that case, "prev" will be a group-vertex, different from
+    // "from" or "to", that _contains_ one of them.
+    AnchorVertex *prev = from;
 
     for (int i = 0; i < m_edges.count(); ++i) {
         AnchorData *e = m_edges.at(i);
 
-        e->sizeAtMinimum = interpolate(minFactor, e->minSize, e->prefSize, e->maxSize);
-        e->sizeAtPreferred = interpolate(prefFactor, e->minSize, e->prefSize, e->maxSize);
-        e->sizeAtMaximum = interpolate(maxFactor, e->minSize, e->prefSize, e->maxSize);
+        const bool edgeIsForward = (e->from == prev);
+        if (edgeIsForward) {
+            e->sizeAtMinimum = interpolate(minFactor, e->minSize, e->minPrefSize,
+                                           e->prefSize, e->maxPrefSize, e->maxSize);
+            e->sizeAtPreferred = interpolate(prefFactor, e->minSize, e->minPrefSize,
+                                           e->prefSize, e->maxPrefSize, e->maxSize);
+            e->sizeAtMaximum = interpolate(maxFactor, e->minSize, e->minPrefSize,
+                                           e->prefSize, e->maxPrefSize, e->maxSize);
+            prev = e->to;
+        } else {
+            Q_ASSERT(prev == e->to);
+            e->sizeAtMinimum = interpolate(minFactor, e->maxSize, e->maxPrefSize,
+                                           e->prefSize, e->minPrefSize, e->minSize);
+            e->sizeAtPreferred = interpolate(prefFactor, e->maxSize, e->maxPrefSize,
+                                           e->prefSize, e->minPrefSize, e->minSize);
+            e->sizeAtMaximum = interpolate(maxFactor, e->maxSize, e->maxPrefSize,
+                                           e->prefSize, e->minPrefSize, e->minSize);
+            prev = e->from;
+        }
 
         e->updateChildrenSizes();
     }
@@ -419,12 +525,31 @@ void SequentialAnchorData::calculateSizeHints()
     minSize = 0;
     prefSize = 0;
     maxSize = 0;
+    minPrefSize = 0;
+    maxPrefSize = 0;
+
+    AnchorVertex *prev = from;
 
     for (int i = 0; i < m_edges.count(); ++i) {
         AnchorData *edge = m_edges.at(i);
-        minSize += edge->minSize;
-        prefSize += edge->prefSize;
-        maxSize += edge->maxSize;
+
+        const bool edgeIsForward = (edge->from == prev);
+        if (edgeIsForward) {
+            minSize += edge->minSize;
+            prefSize += edge->prefSize;
+            maxSize += edge->maxSize;
+            minPrefSize += edge->minPrefSize;
+            maxPrefSize += edge->maxPrefSize;
+            prev = edge->to;
+        } else {
+            Q_ASSERT(prev == edge->to);
+            minSize -= edge->maxSize;
+            prefSize -= edge->prefSize;
+            maxSize -= edge->minSize;
+            minPrefSize -= edge->maxPrefSize;
+            maxPrefSize -= edge->minPrefSize;
+            prev = edge->from;
+        }
     }
 
     // See comment in AnchorData::refreshSizeHints() about sizeAt* values
@@ -588,16 +713,25 @@ AnchorData *QGraphicsAnchorLayoutPrivate::addAnchorMaybeParallel(AnchorData *new
             AnchorData *child = children[i];
             QList<QSimplexConstraint *> *childConstraints = childrenConstraints[i];
 
+            // We need to fix the second child constraints if the parallel group will have the
+            // opposite direction of the second child anchor. For the point of view of external
+            // entities, this anchor was reversed. So if at some point we say that the parallel
+            // has a value of 20, this mean that the second child (when reversed) will be
+            // assigned -20.
+            const bool needsReverse = i == 1 && !parallel->secondForward();
+
             if (!child->isCenterAnchor)
                 continue;
 
             parallel->isCenterAnchor = true;
 
-            for (int i = 0; i < constraints.count(); ++i) {
-                QSimplexConstraint *c = constraints[i];
+            for (int j = 0; j < constraints.count(); ++j) {
+                QSimplexConstraint *c = constraints[j];
                 if (c->variables.contains(child)) {
                     childConstraints->append(c);
                     qreal v = c->variables.take(child);
+                    if (needsReverse)
+                        v *= -1;
                     c->variables.insert(parallel, v);
                 }
             }
@@ -628,24 +762,10 @@ static AnchorData *createSequence(Graph<AnchorVertex, AnchorData> *graph,
                                   const QVector<AnchorVertex*> &vertices,
                                   AnchorVertex *after)
 {
-    AnchorData *data = graph->edgeData(before, vertices.first());
-    Q_ASSERT(data);
-
-    const bool forward = (before == data->from);
-    QVector<AnchorVertex *> orderedVertices;
-
-    if (forward) {
-        orderedVertices = vertices;
-    } else {
-        qSwap(before, after);
-        for (int i = vertices.count() - 1; i >= 0; --i)
-            orderedVertices.append(vertices.at(i));
-    }
-
 #if defined(QT_DEBUG) && 0
     QString strVertices;
-    for (int i = 0; i < orderedVertices.count(); ++i) {
-        strVertices += QString::fromAscii("%1 - ").arg(orderedVertices.at(i)->toString());
+    for (int i = 0; i < vertices.count(); ++i) {
+        strVertices += QString::fromAscii("%1 - ").arg(vertices.at(i)->toString());
     }
     QString strPath = QString::fromAscii("%1 - %2%3").arg(before->toString(), strVertices, after->toString());
     qDebug("simplifying [%s] to [%s - %s]", qPrintable(strPath), qPrintable(before->toString()), qPrintable(after->toString()));
@@ -654,15 +774,22 @@ static AnchorData *createSequence(Graph<AnchorVertex, AnchorData> *graph,
     AnchorVertex *prev = before;
     QVector<AnchorData *> edges;
 
-    for (int i = 0; i <= orderedVertices.count(); ++i) {
-        AnchorVertex *next = (i < orderedVertices.count()) ? orderedVertices.at(i) : after;
+    // Take from the graph, the edges that will be simplificated
+    for (int i = 0; i < vertices.count(); ++i) {
+        AnchorVertex *next = vertices.at(i);
         AnchorData *ad = graph->takeEdge(prev, next);
         Q_ASSERT(ad);
         edges.append(ad);
         prev = next;
     }
 
-    SequentialAnchorData *sequence = new SequentialAnchorData(orderedVertices, edges);
+    // Take the last edge (not covered in the loop above)
+    AnchorData *ad = graph->takeEdge(vertices.last(), after);
+    Q_ASSERT(ad);
+    edges.append(ad);
+
+    // Create sequence
+    SequentialAnchorData *sequence = new SequentialAnchorData(vertices, edges);
     sequence->from = before;
     sequence->to = after;
 
@@ -922,7 +1049,6 @@ bool QGraphicsAnchorLayoutPrivate::simplifyGraphIteration(QGraphicsAnchorLayoutP
     QStack<QPair<AnchorVertex *, AnchorVertex *> > stack;
     stack.push(qMakePair(static_cast<AnchorVertex *>(0), layoutFirstVertex[orientation]));
     QVector<AnchorVertex*> candidates;
-    bool candidatesForward = true;
 
     // Walk depth-first, in the stack we store start of the candidate sequence (beforeSequence)
     // and the vertex to be visited.
@@ -938,9 +1064,8 @@ bool QGraphicsAnchorLayoutPrivate::simplifyGraphIteration(QGraphicsAnchorLayoutP
         // A vertex can trigger an end of sequence if
         // (a) it is a layout vertex, we don't simplify away the layout vertices;
         // (b) it does not have exactly 2 adjacents;
-        // (c) it will change the direction of the sequence;
-        // (d) its next adjacent is already visited (a cycle in the graph);
-        // (e) the next anchor is a center anchor.
+        // (c) its next adjacent is already visited (a cycle in the graph).
+        // (d) the next anchor is a center anchor.
 
         const QList<AnchorVertex *> &adjacents = g.adjacentVertices(v);
         const bool isLayoutVertex = v->m_item == q;
@@ -955,19 +1080,10 @@ bool QGraphicsAnchorLayoutPrivate::simplifyGraphIteration(QGraphicsAnchorLayoutP
         endOfSequence = isLayoutVertex || adjacents.count() != 2;
 
         if (!endOfSequence) {
-            // If this is the first vertice, determine what is the direction to use for this
-            // sequence.
-            if (candidates.isEmpty()) {
-                const AnchorData *data = g.edgeData(beforeSequence, v);
-                Q_ASSERT(data);
-                candidatesForward = (beforeSequence == data->from);
-            }
-
             // This is a tricky part. We peek at the next vertex to find out whether
             //
-            // - the edge from this vertex to the next vertex has the same direction;
-            // - we already visited the next vertex;
-            // - the next anchor is a center.
+            // - we already visited the next vertex (c);
+            // - the next anchor is a center (d).
             //
             // Those are needed to identify the remaining end of sequence cases. Note that unlike
             // (a) and (b), we preempt the end of sequence by looking into the next vertex.
@@ -985,22 +1101,17 @@ bool QGraphicsAnchorLayoutPrivate::simplifyGraphIteration(QGraphicsAnchorLayoutP
 
             const AnchorData *data = g.edgeData(v, after);
             Q_ASSERT(data);
-            const bool willChangeDirection = (candidatesForward != (v == data->from));
             const bool cycleFound = visited.contains(after);
 
-            // Now cases (c), (d) and (e)...
-            endOfSequence = willChangeDirection || cycleFound || data->isCenterAnchor;
+            // Now cases (c) and (d)...
+            endOfSequence = cycleFound || data->isCenterAnchor;
 
-            if (endOfSequence) {
-                if (!willChangeDirection) {
-                    // If the direction will not change, we can add the current vertex to the
-                    // candidates list and we know that 'after' can be used as afterSequence.
-                    candidates.append(v);
-                    afterSequence = after;
-                }
-            } else {
+            if (!endOfSequence) {
                 // If it's not an end of sequence, then the vertex didn't trigger neither of the
-                // previously four cases, so it can be added to the candidates list.
+                // previously three cases, so it can be added to the candidates list.
+                candidates.append(v);
+            } else if (cycleFound && (beforeSequence != after)) {
+                afterSequence = after;
                 candidates.append(v);
             }
         }
@@ -1143,9 +1254,15 @@ void QGraphicsAnchorLayoutPrivate::restoreSimplifiedConstraints(ParallelAnchorDa
         c->variables.insert(parallel->firstEdge, v);
     }
 
+    // When restoring, we might have to revert constraints back. See comments on
+    // addAnchorMaybeParallel().
+    const bool needsReverse = !parallel->secondForward();
+
     for (int i = 0; i < parallel->m_secondConstraints.count(); ++i) {
         QSimplexConstraint *c = parallel->m_secondConstraints.at(i);
         qreal v = c->variables[parallel];
+        if (needsReverse)
+            v *= -1;
         c->variables.remove(parallel);
         c->variables.insert(parallel->secondEdge, v);
     }
@@ -1187,7 +1304,22 @@ void QGraphicsAnchorLayoutPrivate::restoreVertices(Orientation orientation)
     Graph<AnchorVertex, AnchorData> &g = graph[orientation];
     QList<AnchorVertexPair *> &toRestore = simplifiedVertices[orientation];
 
-    // We will restore the vertices in the inverse order of creation, this way we ensure that
+    // Since we keep a list of parallel anchors and vertices that were created during vertex
+    // simplification, we can now iterate on those lists instead of traversing the graph
+    // recursively.
+
+    // First, restore the constraints changed when we created parallel anchors. Note that this
+    // works at this point because the constraints doesn't depend on vertex information and at
+    // this point it's always safe to identify whether the second child is forward or backwards.
+    // In the next step, we'll change the anchors vertices so that would not be possible anymore.
+    QList<AnchorData *> &parallelAnchors = anchorsFromSimplifiedVertices[orientation];
+
+    for (int i = parallelAnchors.count() - 1; i >= 0; --i) {
+        ParallelAnchorData *parallel = static_cast<ParallelAnchorData *>(parallelAnchors.at(i));
+        restoreSimplifiedConstraints(parallel);
+    }
+
+    // Then, we will restore the vertices in the inverse order of creation, this way we ensure that
     // the vertex being restored was not wrapped by another simplification.
     for (int i = toRestore.count() - 1; i >= 0; --i) {
         AnchorVertexPair *pair = toRestore.at(i);
@@ -1231,20 +1363,9 @@ void QGraphicsAnchorLayoutPrivate::restoreVertices(Orientation orientation)
 
         delete pair;
     }
-    toRestore.clear();
-
-    // The restoration process for vertex simplification also restored the effect of the
-    // parallel anchors created during vertex simplification, so we just need to restore
-    // the constraints in case of parallels that contain center anchors. For the same
-    // reason as above, order matters here.
-    QList<AnchorData *> &parallelAnchors = anchorsFromSimplifiedVertices[orientation];
-
-    for (int i = parallelAnchors.count() - 1; i >= 0; --i) {
-        ParallelAnchorData *parallel = static_cast<ParallelAnchorData *>(parallelAnchors.at(i));
-        restoreSimplifiedConstraints(parallel);
-        delete parallel;
-    }
+    qDeleteAll(parallelAnchors);
     parallelAnchors.clear();
+    toRestore.clear();
 }
 
 QGraphicsAnchorLayoutPrivate::Orientation
@@ -1652,6 +1773,10 @@ QGraphicsAnchor *QGraphicsAnchorLayoutPrivate::getAnchor(QGraphicsLayoutItem *fi
                                                          QGraphicsLayoutItem *secondItem,
                                                          Qt::AnchorPoint secondEdge)
 {
+    // Do not expose internal anchors
+    if (firstItem == secondItem)
+        return 0;
+
     const Orientation orientation = edgeOrientation(firstEdge);
     AnchorVertex *v1 = internalVertex(firstItem, firstEdge);
     AnchorVertex *v2 = internalVertex(secondItem, secondEdge);
@@ -1659,8 +1784,16 @@ QGraphicsAnchor *QGraphicsAnchorLayoutPrivate::getAnchor(QGraphicsLayoutItem *fi
     QGraphicsAnchor *graphicsAnchor = 0;
 
     AnchorData *data = graph[orientation].edgeData(v1, v2);
-    if (data)
-        graphicsAnchor = acquireGraphicsAnchor(data);
+    if (data) {
+        // We could use "acquireGraphicsAnchor" here, but to avoid a regression where
+        // an internal anchor was wrongly exposed, I want to ensure no new
+        // QGraphicsAnchor instances are created by this call.
+        // This assumption must hold because anchors are either user-created (and already
+        // have their public object created), or they are internal (and must not reach
+        // this point).
+        Q_ASSERT(data->graphicsAnchor);
+        graphicsAnchor = data->graphicsAnchor;
+    }
     return graphicsAnchor;
 }
 
@@ -1675,12 +1808,16 @@ void QGraphicsAnchorLayoutPrivate::removeAnchor(AnchorVertex *firstVertex,
 {
     Q_Q(QGraphicsAnchorLayout);
 
-    // Actually delete the anchor
-    removeAnchor_helper(firstVertex, secondVertex);
-
+    // Save references to items while it's safe to assume the vertices exist
     QGraphicsLayoutItem *firstItem = firstVertex->m_item;
     QGraphicsLayoutItem *secondItem = secondVertex->m_item;
 
+    // Delete the anchor (may trigger deletion of center vertices)
+    removeAnchor_helper(firstVertex, secondVertex);
+
+    // Ensure no dangling pointer is left behind
+    firstVertex = secondVertex = 0;
+
     // Checking if the item stays in the layout or not
     bool keepFirstItem = false;
     bool keepSecondItem = false;
@@ -2047,6 +2184,25 @@ void QGraphicsAnchorLayoutPrivate::calculateGraphs(
 /*!
     \internal
 
+    Shift all the constraints by a certain amount. This allows us to deal with negative values in
+    the linear program if they are bounded by a certain limit. Functions should be careful to
+    call it again with a negative amount, to shift the constraints back.
+*/
+static void shiftConstraints(const QList<QSimplexConstraint *> &constraints, qreal amount)
+{
+    for (int i = 0; i < constraints.count(); ++i) {
+        QSimplexConstraint *c = constraints.at(i);
+        qreal multiplier = 0;
+        foreach (qreal v, c->variables.values()) {
+            multiplier += v;
+        }
+        c->constant += multiplier * amount;
+    }
+}
+
+/*!
+    \internal
+
     Calculate the sizes for all anchors which are part of the trunk. This works
     on top of a (possibly) simplified graph.
 */
@@ -2067,12 +2223,14 @@ bool QGraphicsAnchorLayoutPrivate::calculateTrunk(Orientation orientation, const
         QList<QSimplexConstraint *> sizeHintConstraints = constraintsFromSizeHints(variables);
         QList<QSimplexConstraint *> allConstraints = constraints + sizeHintConstraints;
 
+        shiftConstraints(allConstraints, g_offset);
+
         // Solve min and max size hints
         qreal min, max;
         feasible = solveMinMax(allConstraints, path, &min, &max);
 
         if (feasible) {
-            solvePreferred(allConstraints, variables);
+            solvePreferred(constraints, variables);
 
             // Calculate and set the preferred size for the layout,
             // from the edge sizes that were calculated above.
@@ -2090,6 +2248,7 @@ bool QGraphicsAnchorLayoutPrivate::calculateTrunk(Orientation orientation, const
         }
 
         qDeleteAll(sizeHintConstraints);
+        shiftConstraints(constraints, -g_offset);
 
     } else {
         // No Simplex is necessary because the path was simplified all the way to a single
@@ -2120,8 +2279,8 @@ bool QGraphicsAnchorLayoutPrivate::calculateTrunk(Orientation orientation, const
 bool QGraphicsAnchorLayoutPrivate::calculateNonTrunk(const QList<QSimplexConstraint *> &constraints,
                                                      const QList<AnchorData *> &variables)
 {
-    QList<QSimplexConstraint *> sizeHintConstraints = constraintsFromSizeHints(variables);
-    bool feasible = solvePreferred(constraints + sizeHintConstraints, variables);
+    shiftConstraints(constraints, g_offset);
+    bool feasible = solvePreferred(constraints, variables);
 
     if (feasible) {
         // Propagate size at preferred to other sizes. Semi-floats always will be
@@ -2134,7 +2293,7 @@ bool QGraphicsAnchorLayoutPrivate::calculateNonTrunk(const QList<QSimplexConstra
         }
     }
 
-    qDeleteAll(sizeHintConstraints);
+    shiftConstraints(constraints, -g_offset);
     return feasible;
 }
 
@@ -2298,17 +2457,23 @@ QList<QSimplexConstraint *> QGraphicsAnchorLayoutPrivate::constraintsFromSizeHin
         if (ad->dependency == AnchorData::Slave)
             continue;
 
-        if ((ad->minSize == ad->maxSize) || qFuzzyCompare(ad->minSize, ad->maxSize)) {
+        // To use negative variables inside simplex, we shift them so the minimum negative value is
+        // mapped to zero before solving. To make sure that it works, we need to guarantee that the
+        // variables are all inside a certain boundary.
+        qreal boundedMin = qBound(-g_offset, ad->minSize, g_offset);
+        qreal boundedMax = qBound(-g_offset, ad->maxSize, g_offset);
+
+        if ((boundedMin == boundedMax) || qFuzzyCompare(boundedMin, boundedMax)) {
             QSimplexConstraint *c = new QSimplexConstraint;
             c->variables.insert(ad, 1.0);
-            c->constant = ad->minSize;
+            c->constant = boundedMin;
             c->ratio = QSimplexConstraint::Equal;
             anchorConstraints += c;
             unboundedProblem = false;
         } else {
             QSimplexConstraint *c = new QSimplexConstraint;
             c->variables.insert(ad, 1.0);
-            c->constant = ad->minSize;
+            c->constant = boundedMin;
             c->ratio = QSimplexConstraint::MoreOrEqual;
             anchorConstraints += c;
 
@@ -2320,7 +2485,7 @@ QList<QSimplexConstraint *> QGraphicsAnchorLayoutPrivate::constraintsFromSizeHin
 
             c = new QSimplexConstraint;
             c->variables.insert(ad, 1.0);
-            c->constant = ad->maxSize;
+            c->constant = boundedMax;
             c->ratio = QSimplexConstraint::LessOrEqual;
             anchorConstraints += c;
             unboundedProblem = false;
@@ -2331,7 +2496,8 @@ QList<QSimplexConstraint *> QGraphicsAnchorLayoutPrivate::constraintsFromSizeHin
     if (unboundedProblem) {
         QSimplexConstraint *c = new QSimplexConstraint;
         c->variables.insert(layoutEdge, 1.0);
-        c->constant = QWIDGETSIZE_MAX;
+        // The maximum size that the layout can take
+        c->constant = g_offset;
         c->ratio = QSimplexConstraint::LessOrEqual;
         anchorConstraints += c;
     }
@@ -2597,6 +2763,8 @@ void QGraphicsAnchorLayoutPrivate::setupEdgesInterpolation(
     result = getFactor(current,
                        sizeHints[orientation][Qt::MinimumSize],
                        sizeHints[orientation][Qt::PreferredSize],
+                       sizeHints[orientation][Qt::PreferredSize],
+                       sizeHints[orientation][Qt::PreferredSize],
                        sizeHints[orientation][Qt::MaximumSize]);
 
     interpolationInterval[orientation] = result.first;
@@ -2625,6 +2793,7 @@ void QGraphicsAnchorLayoutPrivate::interpolateEdge(AnchorVertex *base, AnchorDat
                                         interpolationProgress[orientation]);
 
     qreal edgeDistance = interpolate(factor, edge->sizeAtMinimum, edge->sizeAtPreferred,
+                                     edge->sizeAtPreferred, edge->sizeAtPreferred,
                                      edge->sizeAtMaximum);
 
     Q_ASSERT(edge->from == base || edge->to == base);
@@ -2652,34 +2821,46 @@ bool QGraphicsAnchorLayoutPrivate::solveMinMax(const QList<QSimplexConstraint *>
         for (iter = path.negatives.constBegin(); iter != path.negatives.constEnd(); ++iter)
             objective.variables.insert(*iter, -1.0);
 
+        const qreal objectiveOffset = (path.positives.count() - path.negatives.count()) * g_offset;
         simplex.setObjective(&objective);
 
         // Calculate minimum values
-        *min = simplex.solveMin();
+        *min = simplex.solveMin() - objectiveOffset;
 
         // Save sizeAtMinimum results
         QList<AnchorData *> variables = getVariables(constraints);
         for (int i = 0; i < variables.size(); ++i) {
             AnchorData *ad = static_cast<AnchorData *>(variables.at(i));
-            ad->sizeAtMinimum = ad->result;
-            Q_ASSERT(ad->sizeAtMinimum >= ad->minSize ||
-                     qAbs(ad->sizeAtMinimum - ad->minSize) < 0.00000001);
+            ad->sizeAtMinimum = ad->result - g_offset;
         }
 
         // Calculate maximum values
-        *max = simplex.solveMax();
+        *max = simplex.solveMax() - objectiveOffset;
 
         // Save sizeAtMaximum results
         for (int i = 0; i < variables.size(); ++i) {
             AnchorData *ad = static_cast<AnchorData *>(variables.at(i));
-            ad->sizeAtMaximum = ad->result;
-            // Q_ASSERT(ad->sizeAtMaximum <= ad->maxSize ||
-            //          qAbs(ad->sizeAtMaximum - ad->maxSize) < 0.00000001);
+            ad->sizeAtMaximum = ad->result - g_offset;
         }
     }
     return feasible;
 }
 
+enum slackType { Grower = -1, Shrinker = 1 };
+static QPair<QSimplexVariable *, QSimplexConstraint *> createSlack(QSimplexConstraint *sizeConstraint,
+                                                                   qreal interval, slackType type)
+{
+    QSimplexVariable *slack = new QSimplexVariable;
+    sizeConstraint->variables.insert(slack, type);
+
+    QSimplexConstraint *limit = new QSimplexConstraint;
+    limit->variables.insert(slack, 1.0);
+    limit->ratio = QSimplexConstraint::LessOrEqual;
+    limit->constant = interval;
+
+    return qMakePair(slack, limit);
+}
+
 bool QGraphicsAnchorLayoutPrivate::solvePreferred(const QList<QSimplexConstraint *> &constraints,
                                                   const QList<AnchorData *> &variables)
 {
@@ -2690,7 +2871,8 @@ bool QGraphicsAnchorLayoutPrivate::solvePreferred(const QList<QSimplexConstraint
     // Fill the objective coefficients for this variable. In the
     // end the objective function will be
     //
-    //     z = n * (A_shrink + B_shrink + ...) + (A_grower + B_grower + ...)
+    //     z = n * (A_shrinker_hard + A_grower_hard + B_shrinker_hard + B_grower_hard + ...) +
+    //             (A_shrinker_soft + A_grower_soft + B_shrinker_soft + B_grower_soft + ...)
     //
     // where n is the number of variables that have
     // slacks. Note that here we use the number of variables
@@ -2702,7 +2884,7 @@ bool QGraphicsAnchorLayoutPrivate::solvePreferred(const QList<QSimplexConstraint
     // and we now fill the values for the slack constraints (one per variable),
     // which have this form (the constant A_pref was set when creating the slacks):
     //
-    //      A + A_shrinker - A_grower = A_pref
+    //      A + A_shrinker_hard + A_shrinker_soft - A_grower_hard - A_grower_soft = A_pref
     //
     for (int i = 0; i < variables.size(); ++i) {
         AnchorData *ad = variables.at(i);
@@ -2711,22 +2893,58 @@ bool QGraphicsAnchorLayoutPrivate::solvePreferred(const QList<QSimplexConstraint
         if (ad->isLayoutAnchor)
             continue;
 
-        QSimplexVariable *grower = new QSimplexVariable;
-        QSimplexVariable *shrinker = new QSimplexVariable;
-        QSimplexConstraint *c = new QSimplexConstraint;
-        c->variables.insert(ad, 1.0);
-        c->variables.insert(shrinker, 1.0);
-        c->variables.insert(grower, -1.0);
-        c->constant = ad->prefSize;
+        // By default, all variables are equal to their preferred size. If they have room to
+        // grow or shrink, such flexibility will be added by the additional variables below.
+        QSimplexConstraint *sizeConstraint = new QSimplexConstraint;
+        preferredConstraints += sizeConstraint;
+        sizeConstraint->variables.insert(ad, 1.0);
+        sizeConstraint->constant = ad->prefSize + g_offset;
+
+        // Can easily shrink
+        QPair<QSimplexVariable *, QSimplexConstraint *> slack;
+        const qreal softShrinkInterval = ad->prefSize - ad->minPrefSize;
+        if (softShrinkInterval) {
+            slack = createSlack(sizeConstraint, softShrinkInterval, Shrinker);
+            preferredVariables += slack.first;
+            preferredConstraints += slack.second;
+
+            // Add to objective with ratio == 1 (soft)
+            objective.variables.insert(slack.first, 1.0);
+        }
 
-        preferredConstraints += c;
-        preferredVariables += grower;
-        preferredVariables += shrinker;
+        // Can easily grow
+        const qreal softGrowInterval = ad->maxPrefSize - ad->prefSize;
+        if (softGrowInterval) {
+            slack = createSlack(sizeConstraint, softGrowInterval, Grower);
+            preferredVariables += slack.first;
+            preferredConstraints += slack.second;
 
-        objective.variables.insert(grower, 1.0);
-        objective.variables.insert(shrinker, variables.size());
-    }
+            // Add to objective with ratio == 1 (soft)
+            objective.variables.insert(slack.first, 1.0);
+        }
+
+        // Can shrink if really necessary
+        const qreal hardShrinkInterval = ad->minPrefSize - ad->minSize;
+        if (hardShrinkInterval) {
+            slack = createSlack(sizeConstraint, hardShrinkInterval, Shrinker);
+            preferredVariables += slack.first;
+            preferredConstraints += slack.second;
+
+            // Add to objective with ratio == N (hard)
+            objective.variables.insert(slack.first, variables.size());
+        }
 
+        // Can grow if really necessary
+        const qreal hardGrowInterval = ad->maxSize - ad->maxPrefSize;
+        if (hardGrowInterval) {
+            slack = createSlack(sizeConstraint, hardGrowInterval, Grower);
+            preferredVariables += slack.first;
+            preferredConstraints += slack.second;
+
+            // Add to objective with ratio == N (hard)
+            objective.variables.insert(slack.first, variables.size());
+        }
+    }
 
     QSimplex *simplex = new QSimplex;
     bool feasible = simplex->setConstraints(constraints + preferredConstraints);
@@ -2739,7 +2957,7 @@ bool QGraphicsAnchorLayoutPrivate::solvePreferred(const QList<QSimplexConstraint
         // Save sizeAtPreferred results
         for (int i = 0; i < variables.size(); ++i) {
             AnchorData *ad = variables.at(i);
-            ad->sizeAtPreferred = ad->result;
+            ad->sizeAtPreferred = ad->result - g_offset;
         }
 
         // Make sure we delete the simplex solver -before- we delete the
diff --git a/src/gui/graphicsview/qgraphicsanchorlayout_p.h b/src/gui/graphicsview/qgraphicsanchorlayout_p.h
index 8529e2e..3be9d41 100644
--- a/src/gui/graphicsview/qgraphicsanchorlayout_p.h
+++ b/src/gui/graphicsview/qgraphicsanchorlayout_p.h
@@ -123,17 +123,17 @@ struct AnchorData : public QSimplexVariable {
     AnchorData()
         : QSimplexVariable(), from(0), to(0),
           minSize(0), prefSize(0), maxSize(0),
+          minPrefSize(0), maxPrefSize(0),
           sizeAtMinimum(0), sizeAtPreferred(0),
           sizeAtMaximum(0), item(0), graphicsAnchor(0),
           type(Normal), isLayoutAnchor(false),
           isCenterAnchor(false), orientation(0),
           dependency(Independent) {}
+    virtual ~AnchorData();
 
     virtual void updateChildrenSizes() {}
     void refreshSizeHints(const QLayoutStyleInfo *styleInfo = 0);
 
-    virtual ~AnchorData() {}
-
 #ifdef QT_DEBUG
     void dump(int indent = 2);
     inline QString toString() const;
@@ -154,6 +154,9 @@ struct AnchorData : public QSimplexVariable {
     qreal prefSize;
     qreal maxSize;
 
+    qreal minPrefSize;
+    qreal maxPrefSize;
+
     // Calculated sizes
     // These attributes define which sizes should that anchor be in when the
     // layout is at its minimum, preferred or maximum sizes. Values are
@@ -213,7 +216,8 @@ struct ParallelAnchorData : public AnchorData
         Q_ASSERT(((first->from == second->from) && (first->to == second->to)) ||
                  ((first->from == second->to) && (first->to == second->from)));
 
-        // We arbitrarily choose the direction of the first child as "our" direction
+        // Our convention will be that the parallel group anchor will have the same
+        // direction as the first anchor.
         from = first->from;
         to = first->to;
 #ifdef QT_DEBUG
@@ -224,6 +228,13 @@ struct ParallelAnchorData : public AnchorData
     virtual void updateChildrenSizes();
     bool calculateSizeHints();
 
+    bool secondForward() const {
+        // We have the convention that the first children will define the direction of the
+        // pararell group. Note that we can't rely on 'this->from' or 'this->to'  because they
+        // might be changed by vertex simplification.
+        return firstEdge->from == secondEdge->from;
+    }
+
     AnchorData* firstEdge;
     AnchorData* secondEdge;
 
@@ -343,7 +354,6 @@ public:
     qreal preferredSize;
 
     uint hasSize : 1;         // if false, get size from style.
-    uint reversed : 1;        // if true, the anchor was inverted to keep its value positive
 };
 
 
@@ -365,8 +375,10 @@ public:
     //
     // Interval represents which interpolation interval are we operating in.
     enum Interval {
-        MinToPreferred = 0,
-        PreferredToMax
+        MinimumToMinPreferred = 0,
+        MinPreferredToPreferred,
+        PreferredToMaxPreferred,
+        MaxPreferredToMaximum
     };
 
     // Several structures internal to the layout are duplicated to handle
diff --git a/src/gui/graphicsview/qgraphicsitem.cpp b/src/gui/graphicsview/qgraphicsitem.cpp
index bb45e7e..90cc132 100644
--- a/src/gui/graphicsview/qgraphicsitem.cpp
+++ b/src/gui/graphicsview/qgraphicsitem.cpp
@@ -1341,8 +1341,8 @@ QGraphicsItem::~QGraphicsItem()
     }
 
     if (!d_ptr->children.isEmpty()) {
-        QList<QGraphicsItem *> oldChildren = d_ptr->children;
-        qDeleteAll(oldChildren);
+        while (!d_ptr->children.isEmpty())
+            delete d_ptr->children.first();
         Q_ASSERT(d_ptr->children.isEmpty());
     }
 
@@ -2554,6 +2554,8 @@ QGraphicsEffect *QGraphicsItem::graphicsEffect() const
     If \a effect is the installed on a different item, setGraphicsEffect() will remove
     the effect from the item and install it on this item.
 
+    QGraphicsItem takes ownership of \a effect.
+
     \note This function will apply the effect on itself and all its children.
 
     \since 4.6
@@ -2563,32 +2565,19 @@ void QGraphicsItem::setGraphicsEffect(QGraphicsEffect *effect)
     if (d_ptr->graphicsEffect == effect)
         return;
 
-    if (d_ptr->graphicsEffect && effect) {
+    if (d_ptr->graphicsEffect) {
         delete d_ptr->graphicsEffect;
         d_ptr->graphicsEffect = 0;
     }
 
-    if (!effect) {
-        // Unset current effect.
-        QGraphicsEffectPrivate *oldEffectPrivate = d_ptr->graphicsEffect->d_func();
-        d_ptr->graphicsEffect = 0;
-        if (oldEffectPrivate) {
-            oldEffectPrivate->setGraphicsEffectSource(0); // deletes the current source.
-            if (d_ptr->scene) { // Update the views directly.
-                d_ptr->scene->d_func()->markDirty(this, QRectF(), /*invalidateChildren=*/false,
-                                                  /*force=*/false, /*ignoreOpacity=*/false,
-                                                  /*removeItemFromScene=*/true);
-            }
-        }
-    } else {
+    if (effect) {
         // Set new effect.
         QGraphicsEffectSourcePrivate *sourced = new QGraphicsItemEffectSourcePrivate(this);
         QGraphicsEffectSource *source = new QGraphicsEffectSource(*sourced);
         d_ptr->graphicsEffect = effect;
         effect->d_func()->setGraphicsEffectSource(source);
+        prepareGeometryChange();
     }
-
-    prepareGeometryChange();
 }
 #endif //QT_NO_GRAPHICSEFFECT
 
@@ -7305,13 +7294,6 @@ void QGraphicsObject::ungrabGesture(Qt::GestureType gesture)
 */
 
 /*!
-  \property QGraphicsObject::id
-  \brief the id of of the item
-
-  \sa QObject::objectName(), QObject::setObjectName()
-*/
-
-/*!
   \property QGraphicsObject::opacity
   \brief the opacity of the item
 
@@ -9713,7 +9695,7 @@ void QGraphicsTextItem::mouseReleaseEvent(QGraphicsSceneMouseEvent *event)
     }
 
     QWidget *widget = event->widget();
-    if (widget) {
+    if (widget && (dd->control->textInteractionFlags() & Qt::TextEditable) && boundingRect().contains(event->pos())) {
         qt_widget_private(widget)->handleSoftwareInputPanel(event->button(), dd->clickCausedFocus);
     }
     dd->clickCausedFocus = 0;
diff --git a/src/gui/graphicsview/qgraphicsitem.h b/src/gui/graphicsview/qgraphicsitem.h
index 8bbe9f1..8818a0b 100644
--- a/src/gui/graphicsview/qgraphicsitem.h
+++ b/src/gui/graphicsview/qgraphicsitem.h
@@ -537,7 +537,6 @@ class Q_GUI_EXPORT QGraphicsObject : public QObject, public QGraphicsItem
 {
     Q_OBJECT
     Q_PROPERTY(QGraphicsObject * parent READ parentObject WRITE setParentItem NOTIFY parentChanged DESIGNABLE false)
-    Q_PROPERTY(QString id READ objectName WRITE setObjectName)
     Q_PROPERTY(qreal opacity READ opacity WRITE setOpacity NOTIFY opacityChanged FINAL)
     Q_PROPERTY(bool enabled READ isEnabled WRITE setEnabled NOTIFY enabledChanged)
     Q_PROPERTY(bool visible READ isVisible WRITE setVisible NOTIFY visibleChanged FINAL)
diff --git a/src/gui/graphicsview/qgraphicsitem_p.h b/src/gui/graphicsview/qgraphicsitem_p.h
index d6ffb1a..8f9fe54 100644
--- a/src/gui/graphicsview/qgraphicsitem_p.h
+++ b/src/gui/graphicsview/qgraphicsitem_p.h
@@ -562,7 +562,10 @@ public:
     {}
 
     inline void detach()
-    { item->setGraphicsEffect(0); }
+    {
+        item->d_ptr->graphicsEffect = 0;
+        item->prepareGeometryChange();
+    }
 
     inline const QGraphicsItem *graphicsItem() const
     { return item; }
diff --git a/src/gui/graphicsview/qgraphicsscene.cpp b/src/gui/graphicsview/qgraphicsscene.cpp
index 8777cdc..27ebb79 100644
--- a/src/gui/graphicsview/qgraphicsscene.cpp
+++ b/src/gui/graphicsview/qgraphicsscene.cpp
@@ -4233,7 +4233,6 @@ static void _q_paintIntoCache(QPixmap *pix, QGraphicsItem *item, const QRegion &
     if (!subPix.isNull()) {
         // Blit the subpixmap into the main pixmap.
         pixmapPainter.begin(pix);
-        pixmapPainter.setCompositionMode(QPainter::CompositionMode_Source);
         pixmapPainter.setClipRegion(pixmapExposed);
         pixmapPainter.drawPixmap(br.topLeft(), subPix);
         pixmapPainter.end();
diff --git a/src/gui/graphicsview/qsimplex_p.h b/src/gui/graphicsview/qsimplex_p.h
index a5816d1..2004471 100644
--- a/src/gui/graphicsview/qsimplex_p.h
+++ b/src/gui/graphicsview/qsimplex_p.h
@@ -107,7 +107,7 @@ struct QSimplexConstraint
 
         Q_ASSERT(constant > 0 || qFuzzyCompare(1, 1 + constant));
 
-        if ((leftHandSide == constant) || qAbs(leftHandSide - constant) < 0.00000001)
+        if ((leftHandSide == constant) || qAbs(leftHandSide - constant) < 0.0000001)
             return true;
 
         switch (ratio) {
diff --git a/src/gui/inputmethod/qcoefepinputcontext_s60.cpp b/src/gui/inputmethod/qcoefepinputcontext_s60.cpp
index bdff5e7..a295d66 100644
--- a/src/gui/inputmethod/qcoefepinputcontext_s60.cpp
+++ b/src/gui/inputmethod/qcoefepinputcontext_s60.cpp
@@ -437,6 +437,10 @@ void QCoeFepInputContext::applyHints(Qt::InputMethodHints hints)
 void QCoeFepInputContext::applyFormat(QList<QInputMethodEvent::Attribute> *attributes)
 {
     TCharFormat cFormat;
+    QColor styleTextColor = QApplication::palette("QLineEdit").text().color();
+    TLogicalRgb tontColor(TRgb(styleTextColor.red(), styleTextColor.green(), styleTextColor.blue(), styleTextColor.alpha()));
+    cFormat.iFontPresentation.iTextColor = tontColor;
+
     TInt numChars = 0;
     TInt charPos = 0;
     int oldSize = attributes->size();
diff --git a/src/gui/itemviews/qabstractitemview.cpp b/src/gui/itemviews/qabstractitemview.cpp
index acfeff8..de6e6cb 100644
--- a/src/gui/itemviews/qabstractitemview.cpp
+++ b/src/gui/itemviews/qabstractitemview.cpp
@@ -1625,7 +1625,7 @@ void QAbstractItemView::mousePressEvent(QMouseEvent *event)
     QPoint offset = d->offset();
     if ((command & QItemSelectionModel::Current) == 0)
         d->pressedPosition = pos + offset;
-    else if (!indexAt(d->pressedPosition).isValid())
+    else if (!indexAt(d->pressedPosition - offset).isValid())
         d->pressedPosition = visualRect(currentIndex()).center() + offset;
 
     if (edit(index, NoEditTriggers, event))
@@ -2195,7 +2195,7 @@ void QAbstractItemView::keyPressEvent(QKeyEvent *event)
             // note that we don't check if the new current index is enabled because moveCursor() makes sure it is
             if (command & QItemSelectionModel::Current) {
                 d->selectionModel->setCurrentIndex(newCurrent, QItemSelectionModel::NoUpdate);
-                if (!indexAt(d->pressedPosition).isValid())
+                if (!indexAt(d->pressedPosition - d->offset()).isValid())
                     d->pressedPosition = visualRect(oldCurrent).center() + d->offset();
                 QRect rect(d->pressedPosition - d->offset(), visualRect(newCurrent).center());
                 setSelection(rect, command);
diff --git a/src/gui/itemviews/qlistwidget.cpp b/src/gui/itemviews/qlistwidget.cpp
index 5dd1d76..929d688 100644
--- a/src/gui/itemviews/qlistwidget.cpp
+++ b/src/gui/itemviews/qlistwidget.cpp
@@ -176,7 +176,8 @@ void QListModel::move(int srcRow, int dstRow)
         || dstRow < 0 || dstRow >= items.count())
         return;
 
-    beginMoveRows(QModelIndex(), srcRow, srcRow, QModelIndex(), dstRow);
+    if (!beginMoveRows(QModelIndex(), srcRow, srcRow, QModelIndex(), dstRow))
+        return;
     if (srcRow < dstRow)
         --dstRow;
     items.move(srcRow, dstRow);
diff --git a/src/gui/kernel/qkeysequence.cpp b/src/gui/kernel/qkeysequence.cpp
index e3af683..2361dd0 100644
--- a/src/gui/kernel/qkeysequence.cpp
+++ b/src/gui/kernel/qkeysequence.cpp
@@ -282,8 +282,8 @@ void Q_GUI_EXPORT qt_set_sequence_auto_mnemonic(bool b) { qt_sequence_no_mnemoni
     \row    \i SelectPreviousPage   \i Shift+PgUp                       \i Shift+PgUp             \i Shift+PgUp     \i Shift+PgUp                            \i Shift+PgUp
     \row    \i SelectStartOfLine    \i Shift+Home                       \i Ctrl+Shift+Left        \i Shift+Home     \i Shift+Home                            \i Shift+Home
     \row    \i SelectEndOfLine      \i Shift+End                        \i Ctrl+Shift+Right       \i Shift+End      \i Shift+End                             \i Shift+End
-    \row    \i SelectStartOfBlock   \i (none)                           \i Alt+Shift+Up           \i (none)         \i (none)                                \i (none)
-    \row    \i SelectEndOfBlock     \i (none)                           \i Alt+Shift+Down         \i (none)         \i (none)                                \i (none)
+    \row    \i SelectStartOfBlock   \i (none)                           \i Alt+Shift+Up, Meta+Shift+A \i (none)     \i (none)                                \i (none)
+    \row    \i SelectEndOfBlock     \i (none)                           \i Alt+Shift+Down, Meta+Shift+E \i (none)   \i (none)                                \i (none)
     \row    \i SelectStartOfDocument\i Ctrl+Shift+Home                  \i Ctrl+Shift+Up, Shift+Home          \i Ctrl+Shift+Home\i Ctrl+Shift+Home           \i Ctrl+Shift+Home
     \row    \i SelectEndOfDocument  \i Ctrl+Shift+End                   \i Ctrl+Shift+Down, Shift+End        \i Ctrl+Shift+End \i Ctrl+Shift+End             \i Ctrl+Shift+End
     \row    \i DeleteStartOfWord    \i Ctrl+Backspace                   \i Alt+Backspace          \i Ctrl+Backspace \i Ctrl+Backspace                        \i (none)
@@ -732,6 +732,8 @@ const QKeyBinding QKeySequencePrivate::keyBindings[] = {
     {QKeySequence::MoveToNextPage,          0,          Qt::META | Qt::Key_Down,                QApplicationPrivate::KB_Mac},
     {QKeySequence::MoveToPreviousPage,      0,          Qt::META | Qt::Key_PageUp,              QApplicationPrivate::KB_Mac},
     {QKeySequence::MoveToNextPage,          0,          Qt::META | Qt::Key_PageDown,            QApplicationPrivate::KB_Mac},
+    {QKeySequence::SelectStartOfBlock,      0,          Qt::META | Qt::SHIFT | Qt::Key_A,       QApplicationPrivate::KB_Mac},
+    {QKeySequence::SelectEndOfBlock,        0,          Qt::META | Qt::SHIFT | Qt::Key_E,       QApplicationPrivate::KB_Mac},
     {QKeySequence::SelectStartOfLine,       0,          Qt::META | Qt::SHIFT | Qt::Key_Left,    QApplicationPrivate::KB_Mac},
     {QKeySequence::SelectEndOfLine,         0,          Qt::META | Qt::SHIFT | Qt::Key_Right,   QApplicationPrivate::KB_Mac}    
 };
diff --git a/src/gui/kernel/qsoftkeymanager.cpp b/src/gui/kernel/qsoftkeymanager.cpp
index 775d773..0e98f39 100644
--- a/src/gui/kernel/qsoftkeymanager.cpp
+++ b/src/gui/kernel/qsoftkeymanager.cpp
@@ -190,7 +190,7 @@ bool QSoftKeyManager::event(QEvent *e)
                 }
 
                 QWidget *parent = source->parentWidget();
-                if (parent && softKeys.isEmpty())
+                if (parent && softKeys.isEmpty() && !source->isWindow())
                     source = parent;
                 else
                     break;
@@ -246,15 +246,22 @@ void QSoftKeyManagerPrivate::updateSoftKeys_sys(const QList<QAction*> &softkeys)
             break;
         }
 
-        int command = (softKeyAction->objectName().contains("_q_menuSoftKeyAction"))
+        int command = (softKeyAction->objectName().contains(QLatin1String("_q_menuSoftKeyAction")))
                     ? EAknSoftkeyOptions
                     : s60CommandStart + index;
 
+        // _q_menuSoftKeyAction action is set to "invisible" and all invisible actions are by default
+        // disabled. However we never want to dim options softkey, even it is set to "invisible"
+        bool dimmed = (command == EAknSoftkeyOptions) ? false : !softKeyAction->isEnabled();
+
         if (position != -1) {
             const int underlineShortCut = QApplication::style()->styleHint(QStyle::SH_UnderlineShortcut);
             QString iconText = softKeyAction->iconText();
             TPtrC text = qt_QString2TPtrC( underlineShortCut ? softKeyAction->text() : iconText);
-            QT_TRAP_THROWING(nativeContainer->SetCommandL(position, command, text));
+            QT_TRAP_THROWING(
+                nativeContainer->SetCommandL(position, command, text);
+                nativeContainer->DimCommand(command, dimmed);
+            );
         }
     }
 
diff --git a/src/gui/kernel/qwidget.cpp b/src/gui/kernel/qwidget.cpp
index b389054..21aae3e 100644
--- a/src/gui/kernel/qwidget.cpp
+++ b/src/gui/kernel/qwidget.cpp
@@ -366,7 +366,8 @@ bool QWidget::hasEditFocus() const
     normally; otherwise, Qt::Key_Up and Qt::Key_Down are used to
     change focus.
 
-    This feature is only available in Qt for Embedded Linux.
+    This feature is only available in Qt for Embedded Linux and Qt
+    for Symbian.
 
     \sa hasEditFocus(), QApplication::keypadNavigationEnabled()
 */
@@ -5045,6 +5046,8 @@ QGraphicsEffect *QWidget::graphicsEffect() const
     If \a effect is the installed on a different widget, setGraphicsEffect() will remove
     the effect from the widget and install it on this widget.
 
+    QWidget takes ownership of \a effect.
+
     \note This function will apply the effect on itself and all its children.
 
     \since 4.6
@@ -5058,28 +5061,22 @@ void QWidget::setGraphicsEffect(QGraphicsEffect *effect)
     if (d->graphicsEffect == effect)
         return;
 
-    if (d->graphicsEffect && effect) {
+    if (d->graphicsEffect) {
+        d->invalidateBuffer(rect());
         delete d->graphicsEffect;
         d->graphicsEffect = 0;
     }
 
-    if (!effect) {
-        // Unset current effect.
-        QGraphicsEffectPrivate *oldEffectPrivate = d->graphicsEffect->d_func();
-        d->graphicsEffect = 0;
-        if (oldEffectPrivate) {
-            oldEffectPrivate->setGraphicsEffectSource(0); // deletes the current source.
-        }
-    } else {
+    if (effect) {
         // Set new effect.
         QGraphicsEffectSourcePrivate *sourced = new QWidgetEffectSourcePrivate(this);
         QGraphicsEffectSource *source = new QGraphicsEffectSource(*sourced);
         d->graphicsEffect = effect;
         effect->d_func()->setGraphicsEffectSource(source);
+        update();
     }
 
     d->updateIsOpaque();
-    update();
 }
 #endif //QT_NO_GRAPHICSEFFECT
 
@@ -6045,6 +6042,11 @@ bool QWidget::hasFocus() const
     (Nothing happens if the focus in and focus out widgets are the
     same.)
 
+    \note On embedded platforms, setFocus() will not cause an input panel
+    to be opened by the input method. If you want this to happen, you
+    have to send a QEvent::RequestSoftwareInputPanel event to the
+    widget yourself.
+
     setFocus() gives focus to a widget regardless of its focus policy,
     but does not clear any keyboard grab (see grabKeyboard()).
 
@@ -6057,7 +6059,7 @@ bool QWidget::hasFocus() const
 
     \sa hasFocus(), clearFocus(), focusInEvent(), focusOutEvent(),
     setFocusPolicy(), focusWidget(), QApplication::focusWidget(), grabKeyboard(),
-    grabMouse(), {Keyboard Focus}
+    grabMouse(), {Keyboard Focus}, QEvent::RequestSoftwareInputPanel
 */
 
 void QWidget::setFocus(Qt::FocusReason reason)
diff --git a/src/gui/kernel/qwidget.h b/src/gui/kernel/qwidget.h
index 5ba1d23..0824db3 100644
--- a/src/gui/kernel/qwidget.h
+++ b/src/gui/kernel/qwidget.h
@@ -744,6 +744,7 @@ private:
     friend struct QWidgetExceptionCleaner;
     friend class QGestureManager;
     friend class QWinNativePanGestureRecognizer;
+    friend class QWidgetEffectSourcePrivate;
 
 #ifdef Q_WS_MAC
     friend class QCoreGraphicsPaintEnginePrivate;
diff --git a/src/gui/kernel/qwidget_mac.mm b/src/gui/kernel/qwidget_mac.mm
index 0d9f9ee..1907cca 100644
--- a/src/gui/kernel/qwidget_mac.mm
+++ b/src/gui/kernel/qwidget_mac.mm
@@ -2617,8 +2617,6 @@ void QWidget::destroy(bool destroyWindow, bool destroySubWindows)
             releaseMouse();
         if(mac_keyboard_grabber == this)
             releaseKeyboard();
-        if(acceptDrops())
-            setAcceptDrops(false);
 
         if(testAttribute(Qt::WA_ShowModal))          // just be sure we leave modal
             QApplicationPrivate::leaveModal(this);
diff --git a/src/gui/kernel/qwidget_p.h b/src/gui/kernel/qwidget_p.h
index 04cf4bb..5d73951 100644
--- a/src/gui/kernel/qwidget_p.h
+++ b/src/gui/kernel/qwidget_p.h
@@ -823,7 +823,7 @@ public:
     {}
 
     inline void detach()
-    { m_widget->setGraphicsEffect(0); }
+    { m_widget->d_func()->graphicsEffect = 0; }
 
     inline const QGraphicsItem *graphicsItem() const
     { return 0; }
diff --git a/src/gui/painting/qpaintdevice.qdoc b/src/gui/painting/qpaintdevice.qdoc
index ac1c3de..e923e90 100644
--- a/src/gui/painting/qpaintdevice.qdoc
+++ b/src/gui/painting/qpaintdevice.qdoc
@@ -82,7 +82,7 @@
     horizontal and vertical resolution of the device in dots per
     inch. The physicalDpiX() and physicalDpiY() functions also return
     the resolution of the device in dots per inch, but note that if
-    the logical and vertical resolution differ, the corresponding
+    the logical and physical resolution differ, the corresponding
     QPaintEngine must handle the mapping. Finally, the colorCount()
     function returns the number of different colors available for the
     paint device.
diff --git a/src/gui/painting/qpainter.cpp b/src/gui/painting/qpainter.cpp
index 48629d1..66bf4f7 100644
--- a/src/gui/painting/qpainter.cpp
+++ b/src/gui/painting/qpainter.cpp
@@ -284,7 +284,7 @@ bool QPainterPrivate::attachPainterPrivate(QPainter *q, QPaintDevice *pdev)
 
     // Update matrix.
     if (q->d_ptr->state->WxF) {
-        q->d_ptr->state->redirectionMatrix *= q->d_ptr->state->worldMatrix;
+        q->d_ptr->state->redirectionMatrix = q->d_ptr->state->matrix;
         q->d_ptr->state->redirectionMatrix.translate(-offset.x(), -offset.y());
         q->d_ptr->state->worldMatrix = QTransform();
         q->d_ptr->state->WxF = false;
@@ -5886,7 +5886,12 @@ void QPainter::drawText(const QRectF &r, const QString &text, const QTextOption
     Draws the text item \a ti at position \a p.
 */
 
-/*! \internal
+/*!
+    \fn void QPainter::drawTextItem(const QPointF &p, const QTextItem &ti)
+
+    \internal
+    \since 4.1
+
     Draws the text item \a ti at position \a p.
 
     This method ignores the painters background mode and
@@ -5899,34 +5904,57 @@ void QPainter::drawText(const QRectF &r, const QString &text, const QTextOption
     ignored aswell. You'll need to pass in the correct flags to get
     underlining and strikeout.
 */
-static QPainterPath generateWavyPath(qreal minWidth, qreal maxRadius, QPaintDevice *device)
+
+static QPixmap generateWavyPixmap(qreal maxRadius, const QPen &pen)
 {
-    extern int qt_defaultDpi();
+    const qreal radiusBase = qMax(qreal(1), maxRadius);
+
+    QString key = QLatin1String("WaveUnderline-");
+    key += pen.color().name();
+    key += QLatin1Char('-');
+    key += QString::number(radiusBase);
+
+    QPixmap pixmap;
+    if (QPixmapCache::find(key, pixmap))
+        return pixmap;
+
+    const qreal halfPeriod = qMax(qreal(2), qreal(radiusBase * 1.61803399)); // the golden ratio
+    const int width = qCeil(100 / (2 * halfPeriod)) * (2 * halfPeriod);
+    const int radius = qFloor(radiusBase);
+
     QPainterPath path;
 
-    bool up = true;
-    const qreal radius = qMax(qreal(.5), qMin(qreal(1.25 * device->logicalDpiY() / qt_defaultDpi()), maxRadius));
-    qreal xs, ys;
-    int i = 0;
-    path.moveTo(0, radius);
-    do {
-        xs = i*(2*radius);
-        ys = 0;
+    qreal xs = 0;
+    qreal ys = radius;
 
-        qreal remaining = minWidth - xs;
-        qreal angle = 180;
+    while (xs < width) {
+        xs += halfPeriod;
+        ys = -ys;
+        path.quadTo(xs - halfPeriod / 2, ys, xs, 0);
+    }
 
-        // cut-off at the last arc segment
-        if (remaining < 2 * radius)
-            angle = 180 * remaining / (2 * radius);
+    pixmap = QPixmap(width, radius * 2);
+    pixmap.fill(Qt::transparent);
+    {
+        QPen wavePen = pen;
+        wavePen.setCapStyle(Qt::SquareCap);
+
+        // This is to protect against making the line too fat, as happens on Mac OS X
+        // due to it having a rather thick width for the regular underline.
+        const qreal maxPenWidth = .8 * radius;
+        if (wavePen.widthF() > maxPenWidth)
+            wavePen.setWidth(maxPenWidth);
 
-        path.arcTo(xs, ys, 2*radius, 2*radius, 180, up ? angle : -angle);
+        QPainter imgPainter(&pixmap);
+        imgPainter.setPen(wavePen);
+        imgPainter.setRenderHint(QPainter::Antialiasing);
+        imgPainter.translate(0, radius);
+        imgPainter.drawPath(path);
+    }
 
-        up = !up;
-        ++i;
-    } while (xs + 2*radius < minWidth);
+    QPixmapCache::insert(key, pixmap);
 
-    return path;
+    return pixmap;
 }
 
 static void drawTextItemDecoration(QPainter *painter, const QPointF &pos, const QTextItemInt &ti)
@@ -5947,9 +5975,11 @@ static void drawTextItemDecoration(QPainter *painter, const QPointF &pos, const
     pen.setCapStyle(Qt::FlatCap);
 
     QLineF line(pos.x(), pos.y(), pos.x() + ti.width.toReal(), pos.y());
+
+    const qreal underlineOffset = fe->underlinePosition().toReal();
     // deliberately ceil the offset to avoid the underline coming too close to
     // the text above it.
-    const qreal underlinePos = pos.y() + qCeil(fe->underlinePosition().toReal());
+    const qreal underlinePos = pos.y() + qCeil(underlineOffset);
 
     if (underlineStyle == QTextCharFormat::SpellCheckUnderline) {
         underlineStyle = QTextCharFormat::UnderlineStyle(QApplication::style()->styleHint(QStyle::SH_SpellCheckUnderlineStyle));
@@ -5957,16 +5987,18 @@ static void drawTextItemDecoration(QPainter *painter, const QPointF &pos, const
 
     if (underlineStyle == QTextCharFormat::WaveUnderline) {
         painter->save();
-        painter->setRenderHint(QPainter::Antialiasing);
-        painter->translate(pos.x(), underlinePos);
+        painter->translate(0, pos.y() + 1);
 
         QColor uc = ti.charFormat.underlineColor();
         if (uc.isValid())
-            painter->setPen(uc);
+            pen.setColor(uc);
 
-        painter->drawPath(generateWavyPath(ti.width.toReal(),
-                                           fe->underlinePosition().toReal(),
-                                           painter->device()));
+        // Adapt wave to underlineOffset or pen width, whatever is larger, to make it work on all platforms
+        const QPixmap wave = generateWavyPixmap(qMax(underlineOffset, pen.widthF()), pen);
+        const int descent = (int) ti.descent.toReal();
+
+        painter->setBrushOrigin(painter->brushOrigin().x(), 0);
+        painter->fillRect(pos.x(), 0, qCeil(ti.width.toReal()), qMin(wave.height(), descent), wave);
         painter->restore();
     } else if (underlineStyle != QTextCharFormat::NoUnderline) {
         QLineF underLine(line.x1(), underlinePos, line.x2(), underlinePos);
@@ -6001,10 +6033,6 @@ static void drawTextItemDecoration(QPainter *painter, const QPointF &pos, const
     painter->setBrush(oldBrush);
 }
 
-/*!
-    \internal
-    \since 4.1
-*/
 void QPainter::drawTextItem(const QPointF &p, const QTextItem &_ti)
 {
 #ifdef QT_DEBUG_DRAW
@@ -7602,7 +7630,7 @@ start_lengthVariant:
                 // in the paint engines when drawing on floating point offsets
                 const qreal scale = painter->transform().m22();
                 if (scale != 0)
-                    yoff = qRound(yoff * scale) / scale;
+                    yoff = -qRound(-yoff * scale) / scale;
             }
         }
     }
diff --git a/src/gui/styles/qgtkstyle_p.cpp b/src/gui/styles/qgtkstyle_p.cpp
index 5f4ebae..22dfc62 100644
--- a/src/gui/styles/qgtkstyle_p.cpp
+++ b/src/gui/styles/qgtkstyle_p.cpp
@@ -202,8 +202,12 @@ Ptr_gnome_vfs_init QGtkStylePrivate::gnome_vfs_init = 0;
 
 typedef int (*x11ErrorHandler)(Display*, XErrorEvent*);
 
+QT_END_NAMESPACE
+
 Q_DECLARE_METATYPE(QGtkStylePrivate*);
 
+QT_BEGIN_NAMESPACE
+
 static void gtkStyleSetCallback(GtkWidget*)
 {
     qRegisterMetaType<QGtkStylePrivate *>();
diff --git a/src/gui/styles/qs60style.cpp b/src/gui/styles/qs60style.cpp
index dca78ca..be4f15a 100644
--- a/src/gui/styles/qs60style.cpp
+++ b/src/gui/styles/qs60style.cpp
@@ -454,9 +454,6 @@ void QS60StylePrivate::setThemePalette(QApplication *app) const
     Q_UNUSED(app)
     QPalette widgetPalette = QPalette(Qt::white);
     setThemePalette(&widgetPalette);
-    QApplication::setPalette(widgetPalette); //calling QApplication::setPalette clears palette hash
-    setThemePaletteHash(&widgetPalette);
-    storeThemePalette(&widgetPalette);
 }
 
 QPalette* QS60StylePrivate::themePalette()
@@ -470,8 +467,6 @@ void QS60StylePrivate::setBackgroundTexture(QApplication *app) const
     QPalette applicationPalette = QApplication::palette();
     applicationPalette.setBrush(QPalette::Window, backgroundTexture());
     setThemePalette(&applicationPalette);
-    QApplication::setPalette(applicationPalette);
-    setThemePaletteHash(&applicationPalette);
 }
 
 void QS60StylePrivate::deleteBackground()
@@ -659,7 +654,7 @@ void QS60StylePrivate::setThemePalette(QPalette *palette) const
     palette->setColor(QPalette::WindowText,
         s60Color(QS60StyleEnums::CL_QsnTextColors, 6, 0));
     palette->setColor(QPalette::ButtonText,
-        s60Color(QS60StyleEnums::CL_QsnTextColors, 6, 0));
+        s60Color(QS60StyleEnums::CL_QsnTextColors, 20, 0));
     palette->setColor(QPalette::Text,
         s60Color(QS60StyleEnums::CL_QsnTextColors, 6, 0));
     palette->setColor(QPalette::ToolTipText,
@@ -687,6 +682,10 @@ void QS60StylePrivate::setThemePalette(QPalette *palette) const
     palette->setColor(QPalette::Midlight, palette->color(QPalette::Button).lighter(125));
     palette->setColor(QPalette::Mid, palette->color(QPalette::Button).darker(150));
     palette->setColor(QPalette::Shadow, Qt::black);
+
+    QApplication::setPalette(*palette); //calling QApplication::setPalette clears palette hash
+    setThemePaletteHash(palette);
+    storeThemePalette(palette);
 }
 
 void QS60StylePrivate::deleteThemePalette()
@@ -754,13 +753,15 @@ void QS60StylePrivate::setThemePaletteHash(QPalette *palette) const
     QApplication::setPalette(widgetPalette, "QTableView");
     widgetPalette = *palette;
 
+    widgetPalette.setColor(QPalette::Text,
+        s60Color(QS60StyleEnums::CL_QsnTextColors, 27, 0));
     widgetPalette.setColor(QPalette::HighlightedText,
         s60Color(QS60StyleEnums::CL_QsnTextColors, 24, 0));
     QApplication::setPalette(widgetPalette, "QLineEdit");
     widgetPalette = *palette;
 
     widgetPalette.setColor(QPalette::Text,
-        s60Color(QS60StyleEnums::CL_QsnTextColors, 34, 0));
+        s60Color(QS60StyleEnums::CL_QsnTextColors, 27, 0));
     widgetPalette.setColor(QPalette::HighlightedText,
         s60Color(QS60StyleEnums::CL_QsnTextColors, 24, 0));
     QApplication::setPalette(widgetPalette, "QTextEdit");
@@ -2344,10 +2345,10 @@ int QS60Style::styleHint(StyleHint sh, const QStyleOption *opt, const QWidget *w
     int retValue = -1;
     switch (sh) {
         case SH_Table_GridLineColor:
-            retValue = QS60StylePrivate::s60Color(QS60StyleEnums::CL_QsnLineColors,2,0).rgb();
+            retValue = int(QS60StylePrivate::s60Color(QS60StyleEnums::CL_QsnLineColors,2,0).rgba());
             break;
         case SH_GroupBox_TextLabelColor:
-            retValue = QS60StylePrivate::s60Color(QS60StyleEnums::CL_QsnTextColors,6,0).rgb();
+            retValue = int(QS60StylePrivate::s60Color(QS60StyleEnums::CL_QsnTextColors,6,0).rgba());
             break;
         case SH_ScrollBar_ScrollWhenPointerLeavesControl:
             retValue = true;
@@ -2403,10 +2404,9 @@ int QS60Style::styleHint(StyleHint sh, const QStyleOption *opt, const QWidget *w
             retValue = QFormLayout::WrapLongRows;
             break;
         default:
+            retValue = QCommonStyle::styleHint(sh, opt, widget, hret);
             break;
     }
-    if (retValue == -1)
-        retValue = QCommonStyle::styleHint(sh, opt, widget, hret);
     return retValue;
 }
 
diff --git a/src/gui/styles/qwindowsstyle.cpp b/src/gui/styles/qwindowsstyle.cpp
index 30f2f35..0a59d6d 100644
--- a/src/gui/styles/qwindowsstyle.cpp
+++ b/src/gui/styles/qwindowsstyle.cpp
@@ -213,10 +213,12 @@ bool QWindowsStyle::eventFilter(QObject *o, QEvent *e)
     case QEvent::StyleChange:
     case QEvent::Show:
         if (QProgressBar *bar = qobject_cast<QProgressBar *>(o)) {
-            d->bars << bar;
-            if (d->bars.size() == 1) {
-                Q_ASSERT(d->animationFps> 0);
-                d->animateTimer = startTimer(1000 / d->animationFps);
+            if (!d->bars.contains(bar)) {
+                d->bars << bar;
+                if (d->bars.size() == 1) {
+                    Q_ASSERT(d->animationFps> 0);
+                    d->animateTimer = startTimer(1000 / d->animationFps);
+                }
             }
         }
         break;
diff --git a/src/gui/styles/qwindowsxpstyle.cpp b/src/gui/styles/qwindowsxpstyle.cpp
index fe7f5d7..0767083 100644
--- a/src/gui/styles/qwindowsxpstyle.cpp
+++ b/src/gui/styles/qwindowsxpstyle.cpp
@@ -623,8 +623,7 @@ void QWindowsXPStylePrivate::drawBackground(XPThemeData &themeData)
 
     painter->save();
 
-    QMatrix m = painter->matrix();
-    bool complexXForm = m.m11() != 1.0 || m.m22() != 1.0 || m.m12() != 0.0 || m.m21() != 0.0;
+    bool complexXForm = painter->deviceTransform().type() > QTransform::TxTranslate;
 
     bool translucentToplevel = false;
     QPaintDevice *pdev = painter->device();
diff --git a/src/gui/util/qdesktopservices_s60.cpp b/src/gui/util/qdesktopservices_s60.cpp
index 1890d56..c6932de 100644
--- a/src/gui/util/qdesktopservices_s60.cpp
+++ b/src/gui/util/qdesktopservices_s60.cpp
@@ -41,7 +41,7 @@
 
 // This flag changes the implementation to use S60 CDcoumentHandler
 // instead of apparch when opening the files
-#undef USE_DOCUMENTHANDLER
+#define USE_DOCUMENTHANDLER
 
 #include <qcoreapplication.h>
 #include <qdir.h>
@@ -58,12 +58,14 @@
 #include <rsendasmessage.h>         // RSendAsMessage
 
 #ifdef Q_WS_S60
-#  include <pathinfo.h>               // PathInfo
+#  include <pathinfo.h>             // PathInfo
 #  ifdef USE_DOCUMENTHANDLER
-#    include <documenthandler.h>        // CDocumentHandler
+#    include <documenthandler.h>    // CDocumentHandler
+#    include <aknserverapp.h>
 #  endif
-#elif defined(USE_DOCUMENTHANDLER)
-#  error CDocumentHandler requires support for S60
+#else
+#  warning CDocumentHandler requires support for S60
+#  undef USE_DOCUMENTHANDLER        // Fallback to RApaLsSession based implementation
 #endif
 
 QT_BEGIN_NAMESPACE
@@ -95,6 +97,42 @@ private:
     R* mPtr;
 };
 
+#ifdef USE_DOCUMENTHANDLER
+class QS60DocumentHandler : public MAknServerAppExitObserver
+{
+public:
+    QS60DocumentHandler() :docHandler(0) {}
+
+    ~QS60DocumentHandler() {
+        delete docHandler;
+    }
+
+    CDocumentHandler& documentHandler() {
+        // In case user calls openUrl twice subsequently, before the first embedded app is closed
+        // we use the same CDocumentHandler instance. Using same instance makes sure the first
+        // launched embedded app is closed and latter one gets embedded to our app.
+        // Using different instance would help only theoretically since user cannot interact with
+        // several embedded apps at the same time.
+        if(!docHandler) {
+            QT_TRAP_THROWING(docHandler = CDocumentHandler::NewL());
+            docHandler->SetExitObserver(this);
+        }
+        return *docHandler;
+    }
+
+private: // From MAknServerAppExitObserver
+    void HandleServerAppExit(TInt /*aReason*/) {
+        delete docHandler;
+        docHandler = 0;
+    }
+
+private:
+    CDocumentHandler* docHandler;
+};
+Q_GLOBAL_STATIC(QS60DocumentHandler, qt_s60_documenthandler);
+#endif
+
+
 static void handleMailtoSchemeLX(const QUrl &url)
 {
     // this function has many intermingled leaves and throws. Qt and Symbian objects do not have
@@ -264,21 +302,9 @@ static void openDocumentL(const TDesC& aUrl)
     CleanupStack::PopAndDestroy(); // appArcSession
 #else
     // This is an alternative way to launch app associated to MIME type
-    // CDocumentHandler would support opening apps in embedded mode,
-    // but our Qt application window group seems to always get switched on top of embedded one
-    // -> Cannot use menus etc of embedded app -> used
-
-    CDocumentHandler* docHandler = CDocumentHandler::NewLC();
+    // CDocumentHandler also supports opening apps in embedded mode.
     TDataType temp;
-    //Standalone file opening fails for some file-types at least in S60 3.1 emulator
-    //For example .txt file fails with KErrAlreadyInUse and music files with KERN-EXEC 0
-    //Workaround is to use OpenFileEmbeddedL
-    //docHandler->OpenFileL(aUrl, temp);
-
-    // Opening file with CDocumentHandler will leave if file does not exist
-    // Leave is trapped in openDocument and false returned to user.
-    docHandler->OpenFileEmbeddedL(aUrl, temp);
-    CleanupStack::PopAndDestroy(docHandler);
+    qt_s60_documenthandler()->documentHandler().OpenFileEmbeddedL(aUrl, temp);
 #endif
 }
 
@@ -349,7 +375,7 @@ QString QDesktopServices::storageLocation(StandardLocation type)
     case DesktopLocation:
         qWarning("No desktop concept in Symbian OS");
         // But lets still use some feasible default
-        path.Append(writableDataRoot());           
+        path.Append(writableDataRoot());
         break;
     case DocumentsLocation:
         path.Append(writableDataRoot());
@@ -380,7 +406,7 @@ QString QDesktopServices::storageLocation(StandardLocation type)
 #endif
         break;
     case TempLocation:
-        return QDir::tempPath(); 
+        return QDir::tempPath();
         break;
     case HomeLocation:
         path.Append(writableDataRoot());
@@ -394,10 +420,10 @@ QString QDesktopServices::storageLocation(StandardLocation type)
         CEikonEnv::Static()->FsSession().PrivatePath(path);
         path.Insert(0, writableExeDrive().Name());
         path.Append(KCacheSubDir);
-        break;        
+        break;
     default:
         // Lets use feasible default
-        path.Append(writableDataRoot());    
+        path.Append(writableDataRoot());
         break;
     }
 
diff --git a/src/gui/widgets/qdialogbuttonbox.cpp b/src/gui/widgets/qdialogbuttonbox.cpp
index 0e859f1..f2ef941 100644
--- a/src/gui/widgets/qdialogbuttonbox.cpp
+++ b/src/gui/widgets/qdialogbuttonbox.cpp
@@ -46,6 +46,7 @@
 #include <QtGui/qdialog.h>
 #include <QtGui/qapplication.h>
 #include <QtGui/private/qwidget_p.h>
+#include <QtGui/qaction.h>
 
 #include "qdialogbuttonbox.h"
 
@@ -259,6 +260,31 @@ static const int layouts[2][5][14] =
     }
 };
 
+class QDialogButtonEnabledProxy : public QObject
+{
+public:
+    QDialogButtonEnabledProxy(QObject *parent, QWidget *src, QAction *trg) : QObject(parent), source(src), target(trg)
+    {
+        source->installEventFilter(this);
+        target->setEnabled(source->isEnabled());
+    }
+    ~QDialogButtonEnabledProxy()
+    {
+        source->removeEventFilter(this);
+    }
+    bool eventFilter(QObject *object, QEvent *event)
+    {
+        if (object == source && event->type() == QEvent::EnabledChange) {
+            target->setEnabled(source->isEnabled());
+        }
+        return false;
+    };
+private:
+    QWidget *source;
+    QAction *target;
+};
+
+
 class QDialogButtonBoxPrivate : public QWidgetPrivate
 {
     Q_DECLARE_PUBLIC(QDialogButtonBox)
@@ -548,7 +574,9 @@ void QDialogButtonBoxPrivate::addButton(QAbstractButton *button, QDialogButtonBo
     QObject::connect(button, SIGNAL(destroyed()), q, SLOT(_q_handleButtonDestroyed()));
     buttonLists[role].append(button);
 #ifdef QT_SOFTKEYS_ENABLED
-    softKeyActions.insert(button, createSoftKey(button, role));
+    QAction *action = createSoftKey(button, role);
+    softKeyActions.insert(button, action);
+    new QDialogButtonEnabledProxy(action, button, action);
 #endif
     if (doLayout)
         layoutButtons();
diff --git a/src/gui/widgets/qdockarealayout.cpp b/src/gui/widgets/qdockarealayout.cpp
index 07914b2..0a26a77 100644
--- a/src/gui/widgets/qdockarealayout.cpp
+++ b/src/gui/widgets/qdockarealayout.cpp
@@ -1167,7 +1167,8 @@ bool QDockAreaLayoutInfo::insertGap(const QList<int> &path, QLayoutItem *dockWid
 
             QDockAreaLayoutInfo *subinfo = item.subinfo;
             QLayoutItem *widgetItem = item.widgetItem;
-            QRect r = subinfo == 0 ? dockedGeometry(widgetItem->widget()) : subinfo->rect;
+            QPlaceHolderItem *placeHolderItem = item.placeHolderItem;
+            QRect r = subinfo == 0 ? widgetItem ? dockedGeometry(widgetItem->widget()) : placeHolderItem->topLevelRect : subinfo->rect;
 
             Qt::Orientation opposite = o == Qt::Horizontal ? Qt::Vertical : Qt::Horizontal;
 #ifdef QT_NO_TABBAR
@@ -1176,13 +1177,15 @@ bool QDockAreaLayoutInfo::insertGap(const QList<int> &path, QLayoutItem *dockWid
             QDockAreaLayoutInfo *new_info
                 = new QDockAreaLayoutInfo(sep, dockPos, opposite, tabBarShape, mainWindow);
 
+            //item become a new top-level
             item.subinfo = new_info;
             item.widgetItem = 0;
+            item.placeHolderItem = 0;
 
             QDockAreaLayoutItem new_item
                 = widgetItem == 0
                     ? QDockAreaLayoutItem(subinfo)
-                    : QDockAreaLayoutItem(widgetItem);
+                    : widgetItem ? QDockAreaLayoutItem(widgetItem) : QDockAreaLayoutItem(placeHolderItem);
             new_item.size = pick(opposite, r.size());
             new_item.pos = pick(opposite, r.topLeft());
             new_info->item_list.append(new_item);
diff --git a/src/gui/widgets/qlinecontrol.cpp b/src/gui/widgets/qlinecontrol.cpp
index 87975c3..117c550 100644
--- a/src/gui/widgets/qlinecontrol.cpp
+++ b/src/gui/widgets/qlinecontrol.cpp
@@ -1586,16 +1586,16 @@ void QLineControl::processKeyEvent(QKeyEvent* event)
         }
     }
 #endif //QT_NO_CLIPBOARD
-    else if (event == QKeySequence::MoveToStartOfLine) {
+    else if (event == QKeySequence::MoveToStartOfLine || event == QKeySequence::MoveToStartOfBlock) {
         home(0);
     }
-    else if (event == QKeySequence::MoveToEndOfLine) {
+    else if (event == QKeySequence::MoveToEndOfLine || event == QKeySequence::MoveToEndOfBlock) {
         end(0);
     }
-    else if (event == QKeySequence::SelectStartOfLine) {
+    else if (event == QKeySequence::SelectStartOfLine || event == QKeySequence::SelectStartOfBlock) {
         home(1);
     }
-    else if (event == QKeySequence::SelectEndOfLine) {
+    else if (event == QKeySequence::SelectEndOfLine || event == QKeySequence::SelectEndOfBlock) {
         end(1);
     }
     else if (event == QKeySequence::MoveToNextChar) {
diff --git a/src/gui/widgets/qlineedit.cpp b/src/gui/widgets/qlineedit.cpp
index 785b2bd..2c1acdb 100644
--- a/src/gui/widgets/qlineedit.cpp
+++ b/src/gui/widgets/qlineedit.cpp
@@ -383,6 +383,38 @@ void QLineEdit::setText(const QString& text)
     d->control->setText(text);
 }
 
+// ### Qt 4.7: remove this #if guard
+#if (QT_VERSION >= 0x407000) || defined(Q_WS_MAEMO_5)
+/*!
+    \since 4.7
+
+    \property QLineEdit::placeholderText
+    \brief the line edit's placeholder text
+
+    Setting this property makes the line edit display a grayed-out
+    placeholder text as long as the text() is empty and the widget doesn't
+    have focus.
+
+    By default, this property contains an empty string.
+
+    \sa text()
+*/
+QString QLineEdit::placeholderText() const
+{
+    Q_D(const QLineEdit);
+    return d->placeholderText;
+}
+
+void QLineEdit::setPlaceholderText(const QString& placeholderText)
+{
+    Q_D(QLineEdit);
+    if (d->placeholderText != placeholderText) {
+        d->placeholderText = placeholderText;
+        if (!hasFocus())
+            update();
+    }
+}
+#endif
 
 /*!
     \property QLineEdit::displayText
@@ -1517,7 +1549,7 @@ void QLineEdit::mouseReleaseEvent(QMouseEvent* e)
     }
 #endif
 
-    if (!isReadOnly())
+    if (!isReadOnly() && rect().contains(e->pos()))
         d->handleSoftwareInputPanel(e->button(), d->clickCausedFocus);
     d->clickCausedFocus = 0;
 }
@@ -1829,6 +1861,18 @@ void QLineEdit::paintEvent(QPaintEvent *)
     }
     QRect lineRect(r.x() + d->horizontalMargin, d->vscroll, r.width() - 2*d->horizontalMargin, fm.height());
 
+    if (d->control->text().isEmpty()) {
+        if (!hasFocus() && !d->placeholderText.isEmpty()) {
+            QColor col = pal.text().color();
+            col.setAlpha(128);
+            QPen oldpen = p.pen();
+            p.setPen(col);
+            p.drawText(lineRect, va, d->placeholderText);
+            p.setPen(oldpen);
+            return;
+        }
+    }
+
     int cix = qRound(d->control->cursorToX());
 
     // horizontal scrolling. d->hscroll is the left indent from the beginning
diff --git a/src/gui/widgets/qlineedit.h b/src/gui/widgets/qlineedit.h
index ac918c7..594e488 100644
--- a/src/gui/widgets/qlineedit.h
+++ b/src/gui/widgets/qlineedit.h
@@ -83,6 +83,10 @@ class Q_GUI_EXPORT QLineEdit : public QWidget
     Q_PROPERTY(bool undoAvailable READ isUndoAvailable)
     Q_PROPERTY(bool redoAvailable READ isRedoAvailable)
     Q_PROPERTY(bool acceptableInput READ hasAcceptableInput)
+// ### Qt 4.7: remove this #if guard
+#if (QT_VERSION >= 0x407000) || defined(Q_WS_MAEMO_5)
+    Q_PROPERTY(QString placeholderText READ placeholderText WRITE setPlaceholderText)
+#endif
 
 public:
     explicit QLineEdit(QWidget* parent=0);
@@ -98,6 +102,12 @@ public:
 
     QString displayText() const;
 
+// ### Qt 4.7: remove this #if guard
+#if (QT_VERSION >= 0x407000) || defined(Q_WS_MAEMO_5)
+    QString placeholderText() const;
+    void setPlaceholderText(const QString &);
+#endif
+
     int maxLength() const;
     void setMaxLength(int);
 
diff --git a/src/gui/widgets/qlineedit_p.cpp b/src/gui/widgets/qlineedit_p.cpp
index d03c003..4437fef 100644
--- a/src/gui/widgets/qlineedit_p.cpp
+++ b/src/gui/widgets/qlineedit_p.cpp
@@ -103,12 +103,12 @@ void QLineEditPrivate::_q_handleWindowActivate()
 void QLineEditPrivate::_q_textEdited(const QString &text)
 {
     Q_Q(QLineEdit);
+    emit q->textEdited(text);
 #ifndef QT_NO_COMPLETER
-    if (control->completer() &&
-            control->completer()->completionMode() != QCompleter::InlineCompletion)
+    if (control->completer()
+        && control->completer()->completionMode() != QCompleter::InlineCompletion)
         control->complete(-1); // update the popup on cut/paste/del
 #endif
-    emit q->textEdited(text);
 }
 
 void QLineEditPrivate::_q_cursorPositionChanged(int from, int to)
diff --git a/src/gui/widgets/qlineedit_p.h b/src/gui/widgets/qlineedit_p.h
index 244d2be..dc648e8 100644
--- a/src/gui/widgets/qlineedit_p.h
+++ b/src/gui/widgets/qlineedit_p.h
@@ -142,6 +142,8 @@ public:
     int topTextMargin;
     int rightTextMargin;
     int bottomTextMargin;
+
+    QString placeholderText;
 };
 
 #endif // QT_NO_LINEEDIT
diff --git a/src/gui/widgets/qmenu.cpp b/src/gui/widgets/qmenu.cpp
index 2e27226..ec9683d 100644
--- a/src/gui/widgets/qmenu.cpp
+++ b/src/gui/widgets/qmenu.cpp
@@ -65,6 +65,8 @@
 #include "qmenubar_p.h"
 #include "qwidgetaction.h"
 #include "qtoolbutton.h"
+#include "qpushbutton.h"
+#include <private/qpushbutton_p.h>
 #include <private/qaction_p.h>
 #include <private/qsoftkeymanager_p.h>
 #ifdef QT3_SUPPORT
@@ -417,12 +419,7 @@ void QMenuPrivate::hideUpToMenuBar()
                     hideMenu(m, fadeMenus);
                 if (!fadeMenus) // Mac doesn't clear the action until after hidden.
                     m->d_func()->setCurrentAction(0);
-            } else {
-#ifndef QT_NO_TOOLBUTTON
-                if (qobject_cast<QToolButton*>(caused) == 0)
-#endif
-                    qWarning("QMenu: Internal error");
-                caused = 0;
+            } else {                caused = 0;
             }
         }
 #if defined(Q_WS_MAC)
@@ -1825,8 +1822,15 @@ void QMenu::popup(const QPoint &p, QAction *atAction)
 
     ensurePolished(); // Get the right font
     emit aboutToShow();
+    const bool actionListChanged = d->itemsDirty;
     d->updateActionRects();
-    QPoint pos = p;
+    QPoint pos;
+    QPushButton *causedButton = qobject_cast<QPushButton*>(d->causedPopup.widget);
+    if (actionListChanged && causedButton)
+        pos = QPushButtonPrivate::get(causedButton)->adjustedMenuPosition();
+    else
+        pos = p;
+
     QSize size = sizeHint();
     QRect screen;
 #ifndef QT_NO_GRAPHICSVIEW
@@ -2302,22 +2306,9 @@ void QMenu::mouseReleaseEvent(QMouseEvent *e)
         if (action->menu())
             action->menu()->d_func()->setFirstActionActive();
         else {
-#if defined(Q_WS_WIN) && !defined(QT_NO_MENUBAR)
+#if defined(Q_WS_WIN)
             //On Windows only context menus can be activated with the right button
-            bool isContextMenu = true;
-            const QWidget *cause = d->causedPopup.widget;
-            while (cause) {
-                //if the popup was caused by either QMenuBar or a QToolButton, it is not a context menu
-                if (qobject_cast<const QMenuBar *>(cause) || qobject_cast<const QToolButton *>(cause)) {
-                    isContextMenu = false;
-                    break;
-                } else if (const QMenu *menu = qobject_cast<const QMenu *>(cause)) {
-                    cause = menu->d_func()->causedPopup.widget;
-                } else {
-                    break;
-                }
-            }
-            if (e->button() == Qt::LeftButton || isContextMenu)
+            if (e->button() == Qt::LeftButton || d->topCausedWidget() == 0)
 #endif
                 d->activateAction(action, QAction::Trigger);
         }
diff --git a/src/gui/widgets/qmenu_p.h b/src/gui/widgets/qmenu_p.h
index 5757885..93017f5 100644
--- a/src/gui/widgets/qmenu_p.h
+++ b/src/gui/widgets/qmenu_p.h
@@ -182,6 +182,7 @@ public:
     }
     void init();
 
+    static QMenuPrivate *get(QMenu *m) { return m->d_func(); }
     int scrollerHeight() const;
 
     //item calculations
diff --git a/src/gui/widgets/qplaintextedit.cpp b/src/gui/widgets/qplaintextedit.cpp
index c7759e8..89fe7b8 100644
--- a/src/gui/widgets/qplaintextedit.cpp
+++ b/src/gui/widgets/qplaintextedit.cpp
@@ -1802,6 +1802,9 @@ void QPlainTextEdit::paintEvent(QPaintEvent *e)
     QTextBlock block = firstVisibleBlock();
     qreal maximumWidth = document()->documentLayout()->documentSize().width();
 
+    // Set a brush origin so that the WaveUnderline knows where the wave started
+    painter.setBrushOrigin(offset);
+
     // keep right margin clean from full-width selection
     int maxX = offset.x() + qMax((qreal)viewportRect.width(), maximumWidth)
                - document()->documentMargin();
@@ -1966,7 +1969,7 @@ void QPlainTextEdit::mouseReleaseEvent(QMouseEvent *e)
         d->ensureCursorVisible();
     }
 
-    if (!isReadOnly())
+    if (!isReadOnly() && rect().contains(e->pos()))
         d->handleSoftwareInputPanel(e->button(), d->clickCausedFocus);
     d->clickCausedFocus = 0;
 }
diff --git a/src/gui/widgets/qpushbutton.cpp b/src/gui/widgets/qpushbutton.cpp
index eb34336..849bc43 100644
--- a/src/gui/widgets/qpushbutton.cpp
+++ b/src/gui/widgets/qpushbutton.cpp
@@ -63,6 +63,7 @@
 #include "qaccessible.h"
 #endif
 
+#include "private/qmenu_p.h"
 #include "private/qpushbutton_p.h"
 
 QT_BEGIN_NAMESPACE
@@ -575,12 +576,33 @@ void QPushButtonPrivate::_q_popupPressed()
         return;
 
     menu->setNoReplayFor(q);
+
+    QPoint menuPos = adjustedMenuPosition();
+
+    QPointer<QPushButton> guard(q);
+    QMenuPrivate::get(menu)->causedPopup.widget = guard;
+
+    //Because of a delay in menu effects, we must keep track of the
+    //menu visibility to avoid flicker on button release
+    menuOpen = true;
+    menu->exec(menuPos);
+    if (guard) {
+        menuOpen = false;
+        q->setDown(false);
+    }
+}
+
+QPoint QPushButtonPrivate::adjustedMenuPosition()
+{
+    Q_Q(QPushButton);
+
     bool horizontal = true;
 #if !defined(QT_NO_TOOLBAR)
     QToolBar *tb = qobject_cast<QToolBar*>(parent);
     if (tb && tb->orientation() == Qt::Vertical)
         horizontal = false;
 #endif
+
     QWidgetItem item(q);
     QRect rect = item.geometry();
     rect.setRect(rect.x() - q->x(), rect.y() - q->y(), rect.width(), rect.height());
@@ -603,17 +625,10 @@ void QPushButtonPrivate::_q_popupPressed()
         else
             x -= menuSize.width();
     }
-    QPointer<QPushButton> guard(q);
 
-    //Because of a delay in menu effects, we must keep track of the
-    //menu visibility to avoid flicker on button release
-    menuOpen = true;
-    menu->exec(QPoint(x, y));
-    if (guard) {
-        menuOpen = false;
-        q->setDown(false);
-    }
+    return QPoint(x,y);
 }
+
 #endif // QT_NO_MENU
 
 void QPushButtonPrivate::resetLayoutItemMargins()
diff --git a/src/gui/widgets/qpushbutton_p.h b/src/gui/widgets/qpushbutton_p.h
index f448027..2510e05 100644
--- a/src/gui/widgets/qpushbutton_p.h
+++ b/src/gui/widgets/qpushbutton_p.h
@@ -68,6 +68,10 @@ public:
           defaultButton(false), flat(false), menuOpen(false), lastAutoDefault(false) {}
 
     inline void init() { resetLayoutItemMargins(); }
+    static QPushButtonPrivate* get(QPushButton *b) { return b->d_func(); }
+#ifndef QT_NO_MENU
+    QPoint adjustedMenuPosition();
+#endif
     void resetLayoutItemMargins();
     void _q_popupPressed();
     QDialog *dialogParent() const;
diff --git a/src/gui/widgets/qtextedit.cpp b/src/gui/widgets/qtextedit.cpp
index 1c49ef0..1bc0bf1 100644
--- a/src/gui/widgets/qtextedit.cpp
+++ b/src/gui/widgets/qtextedit.cpp
@@ -1578,7 +1578,7 @@ void QTextEdit::mouseReleaseEvent(QMouseEvent *e)
         d->autoScrollTimer.stop();
         ensureCursorVisible();
     }
-    if (!isReadOnly())
+    if (!isReadOnly() && rect().contains(e->pos()))
         d->handleSoftwareInputPanel(e->button(), d->clickCausedFocus);
     d->clickCausedFocus = 0;
 }
diff --git a/src/gui/widgets/qtoolbar.cpp b/src/gui/widgets/qtoolbar.cpp
index 58a3d28..c0ca015 100644
--- a/src/gui/widgets/qtoolbar.cpp
+++ b/src/gui/widgets/qtoolbar.cpp
@@ -396,10 +396,10 @@ bool QToolBarPrivate::mouseMoveEvent(QMouseEvent *event)
 void QToolBarPrivate::unplug(const QRect &_r)
 {
     Q_Q(QToolBar);
-    layout->setExpanded(false);
     QRect r = _r;
     r.moveTopLeft(q->mapToGlobal(QPoint(0, 0)));
     setWindowState(true, true, r);
+    layout->setExpanded(false);
 }
 
 void QToolBarPrivate::plug(const QRect &r)
diff --git a/src/gui/widgets/qtoolbararealayout.cpp b/src/gui/widgets/qtoolbararealayout.cpp
index c329305..b83026b 100644
--- a/src/gui/widgets/qtoolbararealayout.cpp
+++ b/src/gui/widgets/qtoolbararealayout.cpp
@@ -598,16 +598,21 @@ int QToolBarAreaLayoutInfo::distance(const QPoint &pos) const
 {
     switch (dockPos) {
         case QInternal::LeftDock:
-            return pos.x() - rect.right();
+            if (pos.y() < rect.bottom())
+                return pos.x() - rect.right();
         case QInternal::RightDock:
-            return rect.left() - pos.x();
+            if (pos.y() < rect.bottom())
+                return rect.left() - pos.x();
         case QInternal::TopDock:
-            return pos.y() - rect.bottom();
+            if (pos.x() < rect.right())
+                return pos.y() - rect.bottom();
         case QInternal::BottomDock:
-            return rect.top() - pos.y();
+            if (pos.x() < rect.right())
+                return rect.top() - pos.y();
         default:
-            return -1;
+            break;
     }
+    return -1;
 }
 
 /******************************************************************************
diff --git a/src/gui/widgets/qtoolbarlayout.cpp b/src/gui/widgets/qtoolbarlayout.cpp
index 0afe5d8..93429e4 100644
--- a/src/gui/widgets/qtoolbarlayout.cpp
+++ b/src/gui/widgets/qtoolbarlayout.cpp
@@ -654,6 +654,7 @@ void QToolBarLayout::setExpanded(bool exp)
     if (!tb)
         return;
     if (QMainWindow *win = qobject_cast<QMainWindow*>(tb->parentWidget())) {
+        animating = !tb->isWindow() && win->isAnimated();
         QMainWindowLayout *layout = qobject_cast<QMainWindowLayout*>(win->layout());
         if (expanded) {
             tb->raise();
@@ -664,7 +665,7 @@ void QToolBarLayout::setExpanded(bool exp)
                 layoutActions(rect.size());
             }
         }
-        layout->layoutState.toolBarAreaLayout.apply(win->isAnimated());
+        layout->layoutState.toolBarAreaLayout.apply(animating);
     }
 }
 
diff --git a/src/opengl/qgl.cpp b/src/opengl/qgl.cpp
index d5ca218..8003a29 100644
--- a/src/opengl/qgl.cpp
+++ b/src/opengl/qgl.cpp
@@ -127,18 +127,6 @@ Q_GLOBAL_STATIC(QGLDefaultOverlayFormat, defaultOverlayFormatInstance)
 QGLExtensions::Extensions QGLExtensions::glExtensions = 0;
 bool QGLExtensions::nvidiaFboNeedsFinish = false;
 
-#ifndef APIENTRY
-# define APIENTRY
-#endif
-typedef void (APIENTRY *pfn_glCompressedTexImage2DARB) (GLenum, GLint, GLenum, GLsizei,
-                                                        GLsizei, GLint, GLsizei, const GLvoid *);
-static pfn_glCompressedTexImage2DARB qt_glCompressedTexImage2DARB = 0;
-
-
-#ifndef APIENTRY
-#define APIENTRY
-#endif
-
 Q_GLOBAL_STATIC(QGLSignalProxy, theSignalProxy)
 QGLSignalProxy *QGLSignalProxy::instance()
 {
@@ -185,12 +173,12 @@ public:
 #else
             // We can't do this in the constructor for this object because it
             // needs to be called *before* the QApplication constructor.
-            // Also check for the FragmentProgram extension in conjunction with
+            // Also check for the FragmentShader extension in conjunction with
             // the 2.0 version flag, to cover the case where we export the display
             // from an old GL 1.1 server to a GL 2.x client. In that case we can't
             // use GL 2.0.
             if ((QGLFormat::openGLVersionFlags() & QGLFormat::OpenGL_Version_2_0)
-                && (QGLExtensions::glExtensions & QGLExtensions::FragmentProgram)
+                && (QGLExtensions::glExtensions & QGLExtensions::FragmentShader)
                 && qgetenv("QT_GL_USE_OPENGL1ENGINE").isEmpty())
                 engineType = QPaintEngine::OpenGL2;
             else
@@ -1495,6 +1483,7 @@ void QGLContextPrivate::init(QPaintDevice *dev, const QGLFormat &format)
     version_flags_cached = false;
     version_flags = QGLFormat::OpenGL_Version_None;
     current_fbo = 0;
+    default_fbo = 0;
     active_engine = 0;
 }
 
@@ -1886,118 +1875,42 @@ void QGLContextPrivate::cleanup()
 {
 }
 
-typedef QHash<QString, GLuint> QGLDDSCache;
-Q_GLOBAL_STATIC(QGLDDSCache, qgl_dds_cache)
-
 /*!
     \overload
 
-    Reads the DirectDrawSurface (DDS) compressed file \a fileName and
-    generates a 2D GL texture from it.
+    Reads the compressed texture file \a fileName and generates a 2D GL
+    texture from it.
 
-    Only the DXT1, DXT3 and DXT5 DDS formats are supported.
+    This function can load DirectDrawSurface (DDS) textures in the
+    DXT1, DXT3 and DXT5 DDS formats if the \c GL_ARB_texture_compression
+    and \c GL_EXT_texture_compression_s3tc extensions are supported.
 
-    Note that this will only work if the implementation supports the
-    \c GL_ARB_texture_compression and \c GL_EXT_texture_compression_s3tc
-    extensions.
+    Since 4.6.1, textures in the ETC1 format can be loaded if the
+    \c GL_OES_compressed_ETC1_RGB8_texture extension is supported
+    and the ETC1 texture has been encapsulated in the PVR container format.
+    Also, textures in the PVRTC2 and PVRTC4 formats can be loaded
+    if the \c GL_IMG_texture_compression_pvrtc extension is supported.
 
     \sa deleteTexture()
 */
 
 GLuint QGLContext::bindTexture(const QString &fileName)
 {
-    if (!qt_glCompressedTexImage2DARB) {
-        qWarning("QGLContext::bindTexture(): The GL implementation does not support texture"
-                 "compression extensions.");
-        return 0;
-    }
-
-    QGLDDSCache::const_iterator it = qgl_dds_cache()->constFind(fileName);
-    if (it != qgl_dds_cache()->constEnd()) {
+    Q_D(QGLContext);
+    QGLDDSCache *dds_cache = &(d->group->m_dds_cache);
+    QGLDDSCache::const_iterator it = dds_cache->constFind(fileName);
+    if (it != dds_cache->constEnd()) {
         glBindTexture(GL_TEXTURE_2D, it.value());
         return it.value();
     }
 
-    QFile f(fileName);
-    f.open(QIODevice::ReadOnly);
-
-    char tag[4];
-    f.read(&tag[0], 4);
-    if (strncmp(tag,"DDS ", 4) != 0) {
-        qWarning("QGLContext::bindTexture(): not a DDS image file.");
-        return 0;
-    }
-
-    DDSFormat ddsHeader;
-    f.read((char *) &ddsHeader, sizeof(DDSFormat));
-
-    if (!ddsHeader.dwLinearSize) {
-        qWarning("QGLContext::bindTexture() DDS image size is not valid.");
-        return 0;
-    }
-
-    int factor = 4;
-    int bufferSize = 0;
-    int blockSize = 16;
-    GLenum format;
-
-    switch(ddsHeader.ddsPixelFormat.dwFourCC) {
-    case FOURCC_DXT1:
-        format = GL_COMPRESSED_RGBA_S3TC_DXT1_EXT;
-        factor = 2;
-        blockSize = 8;
-        break;
-    case FOURCC_DXT3:
-        format = GL_COMPRESSED_RGBA_S3TC_DXT3_EXT;
-        break;
-    case FOURCC_DXT5:
-        format = GL_COMPRESSED_RGBA_S3TC_DXT5_EXT;
-        break;
-    default:
-        qWarning("QGLContext::bindTexture() DDS image format not supported.");
+    QGLTexture texture(this);
+    QSize size = texture.bindCompressedTexture(fileName);
+    if (!size.isValid())
         return 0;
-    }
-
-    if (ddsHeader.dwMipMapCount > 1)
-        bufferSize = ddsHeader.dwLinearSize * factor;
-    else
-        bufferSize = ddsHeader.dwLinearSize;
 
-    GLubyte *pixels = (GLubyte *) malloc(bufferSize*sizeof(GLubyte));
-    f.seek(ddsHeader.dwSize + 4);
-    f.read((char *) pixels, bufferSize);
-    f.close();
-
-    GLuint tx_id;
-    glGenTextures(1, &tx_id);
-    glBindTexture(GL_TEXTURE_2D, tx_id);
-    glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
-    glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
-
-    int size;
-    int offset = 0;
-    int w = ddsHeader.dwWidth;
-    int h = ddsHeader.dwHeight;
-
-    // load mip-maps
-    for(int i = 0; i < (int) ddsHeader.dwMipMapCount; ++i) {
-        if (w == 0) w = 1;
-        if (h == 0) h = 1;
-
-        size = ((w+3)/4) * ((h+3)/4) * blockSize;
-        qt_glCompressedTexImage2DARB(GL_TEXTURE_2D, i, format, w, h, 0,
-                                     size, pixels + offset);
-        offset += size;
-
-        // half size for each mip-map level
-        w = w/2;
-        h = h/2;
-    }
-
-    free(pixels);
-
-    qgl_dds_cache()->insert(fileName, tx_id);
-    return tx_id;
+    dds_cache->insert(fileName, texture.id);
+    return texture.id;
 }
 
 static inline QRgb qt_gl_convertToGLFormatHelper(QRgb src_pixel, GLenum texture_format)
@@ -2277,13 +2190,21 @@ QGLTexture* QGLContextPrivate::bindTexture(const QImage &image, GLenum target, G
 #ifdef QGL_BIND_TEXTURE_DEBUG
             printf(" - flipping bits over y (%d ms)\n", time.elapsed());
 #endif
-        int ipl = img.bytesPerLine() / 4;
-        int h = img.height();
-        for (int y=0; y<h/2; ++y) {
-            int *a = (int *) img.scanLine(y);
-            int *b = (int *) img.scanLine(h - y - 1);
-            for (int x=0; x<ipl; ++x)
-                qSwap(a[x], b[x]);
+        if (img.isDetached()) {
+            int ipl = img.bytesPerLine() / 4;
+            int h = img.height();
+            for (int y=0; y<h/2; ++y) {
+                int *a = (int *) img.scanLine(y);
+                int *b = (int *) img.scanLine(h - y - 1);
+                for (int x=0; x<ipl; ++x)
+                    qSwap(a[x], b[x]);
+            }
+        } else {
+            // Create a new image and copy across.  If we use the
+            // above in-place code then a full copy of the image is
+            // made before the lines are swapped, which processes the
+            // data twice.  This version should only do it once.
+            img = img.mirrored();
         }
     }
 
@@ -2313,6 +2234,14 @@ QGLTexture* QGLContextPrivate::bindTexture(const QImage &image, GLenum target, G
             }
         }
     }
+#ifdef QT_OPENGL_ES
+    // OpenGL/ES requires that the internal and external formats be identical.
+    // This is typically used to convert GL_RGBA into GL_BGRA.
+    // Also, we need to use GL_UNSIGNED_BYTE when the format is GL_BGRA.
+    internalFormat = externalFormat;
+    if (pixel_type == GL_UNSIGNED_INT_8_8_8_8_REV)
+        pixel_type = GL_UNSIGNED_BYTE;
+#endif
 #ifdef QGL_BIND_TEXTURE_DEBUG
     printf(" - uploading, image.format=%d, externalFormat=0x%x, internalFormat=0x%x, pixel_type=0x%x\n",
            img.format(), externalFormat, internalFormat, pixel_type);
@@ -2584,17 +2513,20 @@ GLuint QGLContext::bindTexture(const QPixmap &pixmap, QMacCompatGLenum target, Q
 */
 void QGLContext::deleteTexture(GLuint id)
 {
+    Q_D(QGLContext);
+
     if (QGLTextureCache::instance()->remove(this, id))
         return;
 
     // check the DDS cache if the texture wasn't found in the pixmap/image
     // cache
-    QList<QString> ddsKeys = qgl_dds_cache()->keys();
+    QGLDDSCache *dds_cache = &(d->group->m_dds_cache);
+    QList<QString> ddsKeys = dds_cache->keys();
     for (int i = 0; i < ddsKeys.size(); ++i) {
-        GLuint texture = qgl_dds_cache()->value(ddsKeys.at(i));
+        GLuint texture = dds_cache->value(ddsKeys.at(i));
         if (id == texture) {
             glDeleteTextures(1, &texture);
-            qgl_dds_cache()->remove(ddsKeys.at(i));
+            dds_cache->remove(ddsKeys.at(i));
             return;
         }
     }
@@ -4898,10 +4830,18 @@ void QGLExtensions::init_extensions()
         glExtensions |= SampleBuffers;
     if (extensions.contains("GL_SGIS_generate_mipmap"))
         glExtensions |= GenerateMipmap;
-    if (extensions.contains("GL_EXT_texture_compression_s3tc"))
+    if (extensions.contains("GL_ARB_texture_compression"))
         glExtensions |= TextureCompression;
+    if (extensions.contains("GL_EXT_texture_compression_s3tc"))
+        glExtensions |= DDSTextureCompression;
+    if (extensions.contains("GL_OES_compressed_ETC1_RGB8_texture"))
+        glExtensions |= ETC1TextureCompression;
+    if (extensions.contains("GL_IMG_texture_compression_pvrtc"))
+        glExtensions |= PVRTCTextureCompression;
     if (extensions.contains("GL_ARB_fragment_program"))
         glExtensions |= FragmentProgram;
+    if (extensions.contains("GL_ARB_fragment_shader"))
+        glExtensions |= FragmentShader;
     if (extensions.contains("GL_ARB_texture_mirrored_repeat"))
         glExtensions |= MirroredRepeat;
     if (extensions.contains("GL_EXT_framebuffer_object"))
@@ -4919,6 +4859,7 @@ void QGLExtensions::init_extensions()
 #if defined(QT_OPENGL_ES_2)
     glExtensions |= FramebufferObject;
     glExtensions |= GenerateMipmap;
+    glExtensions |= FragmentShader;
 #endif
 #if defined(QT_OPENGL_ES_1) || defined(QT_OPENGL_ES_1_CL)
     if (extensions.contains("GL_OES_framebuffer_object"))
@@ -4942,12 +4883,6 @@ void QGLExtensions::init_extensions()
 
     if (extensions.contains("GL_EXT_bgra"))
         glExtensions |= BGRATextureFormat;
-
-
-    QGLContext cx(QGLFormat::defaultFormat());
-    if (glExtensions & TextureCompression) {
-        qt_glCompressedTexImage2DARB = (pfn_glCompressedTexImage2DARB) cx.getProcAddress(QLatin1String("glCompressedTexImage2DARB"));
-    }
 }
 
 /*
@@ -5103,4 +5038,341 @@ void QGLSharedResourceGuard::setContext(const QGLContext *context)
     }
 }
 
+QSize QGLTexture::bindCompressedTexture
+    (const QString& fileName, const char *format)
+{
+    QFile file(fileName);
+    if (!file.open(QIODevice::ReadOnly))
+        return QSize();
+    QByteArray contents = file.readAll();
+    file.close();
+    return bindCompressedTexture
+        (contents.constData(), contents.size(), format);
+}
+
+// PVR header format for container files that store textures compressed
+// with the ETC1, PVRTC2, and PVRTC4 encodings.  Format information from the
+// PowerVR SDK at http://www.imgtec.com/powervr/insider/powervr-sdk.asp
+// "PVRTexTool Reference Manual, version 1.11f".
+struct PvrHeader
+{
+    quint32 headerSize;
+    quint32 height;
+    quint32 width;
+    quint32 mipMapCount;
+    quint32 flags;
+    quint32 dataSize;
+    quint32 bitsPerPixel;
+    quint32 redMask;
+    quint32 greenMask;
+    quint32 blueMask;
+    quint32 alphaMask;
+    quint32 magic;
+    quint32 surfaceCount;
+};
+
+#define PVR_MAGIC               0x21525650      // "PVR!" in little-endian
+
+#define PVR_FORMAT_MASK         0x000000FF
+#define PVR_FORMAT_PVRTC2       0x00000018
+#define PVR_FORMAT_PVRTC4       0x00000019
+#define PVR_FORMAT_ETC1         0x00000036
+
+#define PVR_HAS_MIPMAPS         0x00000100
+#define PVR_TWIDDLED            0x00000200
+#define PVR_NORMAL_MAP          0x00000400
+#define PVR_BORDER_ADDED        0x00000800
+#define PVR_CUBE_MAP            0x00001000
+#define PVR_FALSE_COLOR_MIPMAPS 0x00002000
+#define PVR_VOLUME_TEXTURE      0x00004000
+#define PVR_ALPHA_IN_TEXTURE    0x00008000
+#define PVR_VERTICAL_FLIP       0x00010000
+
+#ifndef GL_COMPRESSED_RGB_PVRTC_4BPPV1_IMG
+#define GL_COMPRESSED_RGB_PVRTC_4BPPV1_IMG      0x8C00
+#define GL_COMPRESSED_RGB_PVRTC_2BPPV1_IMG      0x8C01
+#define GL_COMPRESSED_RGBA_PVRTC_4BPPV1_IMG     0x8C02
+#define GL_COMPRESSED_RGBA_PVRTC_2BPPV1_IMG     0x8C03
+#endif
+
+#ifndef GL_ETC1_RGB8_OES
+#define GL_ETC1_RGB8_OES                        0x8D64
+#endif
+
+bool QGLTexture::canBindCompressedTexture
+    (const char *buf, int len, const char *format, bool *hasAlpha)
+{
+    if (QSysInfo::ByteOrder != QSysInfo::LittleEndian) {
+        // Compressed texture loading only supported on little-endian
+        // systems such as x86 and ARM at the moment.
+        return false;
+    }
+    if (!format) {
+        // Auto-detect the format from the header.
+        if (len >= 4 && !qstrncmp(buf, "DDS ", 4)) {
+            *hasAlpha = true;
+            return true;
+        } else if (len >= 52 && !qstrncmp(buf + 44, "PVR!", 4)) {
+            const PvrHeader *pvrHeader =
+                reinterpret_cast<const PvrHeader *>(buf);
+            *hasAlpha = (pvrHeader->alphaMask != 0);
+            return true;
+        }
+    } else {
+        // Validate the format against the header.
+        if (!qstricmp(format, "DDS")) {
+            if (len >= 4 && !qstrncmp(buf, "DDS ", 4)) {
+                *hasAlpha = true;
+                return true;
+            }
+        } else if (!qstricmp(format, "PVR") || !qstricmp(format, "ETC1")) {
+            if (len >= 52 && !qstrncmp(buf + 44, "PVR!", 4)) {
+                const PvrHeader *pvrHeader =
+                    reinterpret_cast<const PvrHeader *>(buf);
+                *hasAlpha = (pvrHeader->alphaMask != 0);
+                return true;
+            }
+        }
+    }
+    return false;
+}
+
+#define ctx QGLContext::currentContext()
+
+QSize QGLTexture::bindCompressedTexture
+    (const char *buf, int len, const char *format)
+{
+    if (QSysInfo::ByteOrder != QSysInfo::LittleEndian) {
+        // Compressed texture loading only supported on little-endian
+        // systems such as x86 and ARM at the moment.
+        return QSize();
+    }
+#if !defined(QT_OPENGL_ES)
+    if (!glCompressedTexImage2D) {
+        if (!(QGLExtensions::glExtensions & QGLExtensions::TextureCompression)) {
+            qWarning("QGLContext::bindTexture(): The GL implementation does "
+                     "not support texture compression extensions.");
+            return QSize();
+        }
+        glCompressedTexImage2D = (_glCompressedTexImage2DARB) ctx->getProcAddress(QLatin1String("glCompressedTexImage2DARB"));
+        if (!glCompressedTexImage2D) {
+            qWarning("QGLContext::bindTexture(): could not resolve "
+                     "glCompressedTexImage2DARB.");
+            return QSize();
+        }
+    }
+#endif
+    if (!format) {
+        // Auto-detect the format from the header.
+        if (len >= 4 && !qstrncmp(buf, "DDS ", 4))
+            return bindCompressedTextureDDS(buf, len);
+        else if (len >= 52 && !qstrncmp(buf + 44, "PVR!", 4))
+            return bindCompressedTexturePVR(buf, len);
+    } else {
+        // Validate the format against the header.
+        if (!qstricmp(format, "DDS")) {
+            if (len >= 4 && !qstrncmp(buf, "DDS ", 4))
+                return bindCompressedTextureDDS(buf, len);
+        } else if (!qstricmp(format, "PVR") || !qstricmp(format, "ETC1")) {
+            if (len >= 52 && !qstrncmp(buf + 44, "PVR!", 4))
+                return bindCompressedTexturePVR(buf, len);
+        }
+    }
+    return QSize();
+}
+
+QSize QGLTexture::bindCompressedTextureDDS(const char *buf, int len)
+{
+    // We only support 2D texture loading at present.
+    if (target != GL_TEXTURE_2D)
+        return QSize();
+
+    // Bail out if the necessary extension is not present.
+    if (!(QGLExtensions::glExtensions & QGLExtensions::DDSTextureCompression)) {
+        qWarning("QGLContext::bindTexture(): DDS texture compression is not supported.");
+        return QSize();
+    }
+
+    const DDSFormat *ddsHeader = reinterpret_cast<const DDSFormat *>(buf + 4);
+    if (!ddsHeader->dwLinearSize) {
+        qWarning("QGLContext::bindTexture(): DDS image size is not valid.");
+        return QSize();
+    }
+
+    int blockSize = 16;
+    GLenum format;
+
+    switch(ddsHeader->ddsPixelFormat.dwFourCC) {
+    case FOURCC_DXT1:
+        format = GL_COMPRESSED_RGBA_S3TC_DXT1_EXT;
+        blockSize = 8;
+        break;
+    case FOURCC_DXT3:
+        format = GL_COMPRESSED_RGBA_S3TC_DXT3_EXT;
+        break;
+    case FOURCC_DXT5:
+        format = GL_COMPRESSED_RGBA_S3TC_DXT5_EXT;
+        break;
+    default:
+        qWarning("QGLContext::bindTexture(): DDS image format not supported.");
+        return QSize();
+    }
+
+    const GLubyte *pixels =
+        reinterpret_cast<const GLubyte *>(buf + ddsHeader->dwSize + 4);
+
+    glGenTextures(1, &id);
+    glBindTexture(GL_TEXTURE_2D, id);
+    glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+    glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+
+    int size;
+    int offset = 0;
+    int available = len - int(ddsHeader->dwSize + 4);
+    int w = ddsHeader->dwWidth;
+    int h = ddsHeader->dwHeight;
+
+    // load mip-maps
+    for(int i = 0; i < (int) ddsHeader->dwMipMapCount; ++i) {
+        if (w == 0) w = 1;
+        if (h == 0) h = 1;
+
+        size = ((w+3)/4) * ((h+3)/4) * blockSize;
+        if (size > available)
+            break;
+        glCompressedTexImage2D(GL_TEXTURE_2D, i, format, w, h, 0,
+                               size, pixels + offset);
+        offset += size;
+        available -= size;
+
+        // half size for each mip-map level
+        w = w/2;
+        h = h/2;
+    }
+
+    // DDS images are not inverted.
+    options &= ~QGLContext::InvertedYBindOption;
+
+    return QSize(ddsHeader->dwWidth, ddsHeader->dwHeight);
+}
+
+QSize QGLTexture::bindCompressedTexturePVR(const char *buf, int len)
+{
+    // We only support 2D texture loading at present.  Cube maps later.
+    if (target != GL_TEXTURE_2D)
+        return QSize();
+
+    // Determine which texture format we will be loading.
+    const PvrHeader *pvrHeader = reinterpret_cast<const PvrHeader *>(buf);
+    GLenum textureFormat;
+    quint32 minWidth, minHeight;
+    switch (pvrHeader->flags & PVR_FORMAT_MASK) {
+    case PVR_FORMAT_PVRTC2:
+        if (pvrHeader->alphaMask)
+            textureFormat = GL_COMPRESSED_RGBA_PVRTC_2BPPV1_IMG;
+        else
+            textureFormat = GL_COMPRESSED_RGB_PVRTC_2BPPV1_IMG;
+        minWidth = 16;
+        minHeight = 8;
+        break;
+
+    case PVR_FORMAT_PVRTC4:
+        if (pvrHeader->alphaMask)
+            textureFormat = GL_COMPRESSED_RGBA_PVRTC_4BPPV1_IMG;
+        else
+            textureFormat = GL_COMPRESSED_RGB_PVRTC_4BPPV1_IMG;
+        minWidth = 8;
+        minHeight = 8;
+        break;
+
+    case PVR_FORMAT_ETC1:
+        textureFormat = GL_ETC1_RGB8_OES;
+        minWidth = 4;
+        minHeight = 4;
+        break;
+
+    default:
+        qWarning("QGLContext::bindTexture(): PVR image format 0x%x not supported.", int(pvrHeader->flags & PVR_FORMAT_MASK));
+        return QSize();
+    }
+
+    // Bail out if the necessary extension is not present.
+    if (textureFormat == GL_ETC1_RGB8_OES) {
+        if (!(QGLExtensions::glExtensions &
+                    QGLExtensions::ETC1TextureCompression)) {
+            qWarning("QGLContext::bindTexture(): ETC1 texture compression is not supported.");
+            return QSize();
+        }
+    } else {
+        if (!(QGLExtensions::glExtensions &
+                    QGLExtensions::PVRTCTextureCompression)) {
+            qWarning("QGLContext::bindTexture(): PVRTC texture compression is not supported.");
+            return QSize();
+        }
+    }
+
+    // Boundary check on the buffer size.
+    quint32 bufferSize = pvrHeader->headerSize + pvrHeader->dataSize;
+    if (bufferSize > quint32(len)) {
+        qWarning("QGLContext::bindTexture(): PVR image size is not valid.");
+        return QSize();
+    }
+
+    // Create the texture.
+    glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
+    glGenTextures(1, &id);
+    glBindTexture(GL_TEXTURE_2D, id);
+    if (pvrHeader->mipMapCount) {
+        if ((options & QGLContext::LinearFilteringBindOption) != 0) {
+            glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+            glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
+        } else {
+            glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+            glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST_MIPMAP_NEAREST);
+        }
+    } else if ((options & QGLContext::LinearFilteringBindOption) != 0) {
+        glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+        glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+    } else {
+        glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+        glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+    }
+
+    // Load the compressed mipmap levels.
+    const GLubyte *buffer =
+        reinterpret_cast<const GLubyte *>(buf + pvrHeader->headerSize);
+    bufferSize = pvrHeader->dataSize;
+    quint32 level = 0;
+    quint32 width = pvrHeader->width;
+    quint32 height = pvrHeader->height;
+    while (bufferSize > 0 && level < pvrHeader->mipMapCount) {
+        quint32 size =
+            (qMax(width, minWidth) * qMax(height, minHeight) *
+             pvrHeader->bitsPerPixel) / 8;
+        if (size > bufferSize)
+            break;
+        glCompressedTexImage2D(GL_TEXTURE_2D, GLint(level), textureFormat,
+                               GLsizei(width), GLsizei(height), 0,
+                               GLsizei(size), buffer);
+        width /= 2;
+        height /= 2;
+        buffer += size;
+        ++level;
+    }
+
+    // Restore the default pixel alignment for later texture uploads.
+    glPixelStorei(GL_UNPACK_ALIGNMENT, 4);
+
+    // Set the invert flag for the texture.  The "vertical flip"
+    // flag in PVR is the opposite sense to our sense of inversion.
+    if ((pvrHeader->flags & PVR_VERTICAL_FLIP) != 0)
+        options &= ~QGLContext::InvertedYBindOption;
+    else
+        options |= QGLContext::InvertedYBindOption;
+
+    return QSize(pvrHeader->width, pvrHeader->height);
+}
+
+#undef ctx
+
 QT_END_NAMESPACE
diff --git a/src/opengl/qgl_p.h b/src/opengl/qgl_p.h
index 8e472e5..615fb60 100644
--- a/src/opengl/qgl_p.h
+++ b/src/opengl/qgl_p.h
@@ -222,6 +222,8 @@ public:
 class QGLContextResource;
 class QGLSharedResourceGuard;
 
+typedef QHash<QString, GLuint> QGLDDSCache;
+
 // QGLContextPrivate has the responsibility of creating context groups.
 // QGLContextPrivate and QGLShareRegister will both maintain the reference counter and destroy
 // context groups when needed.
@@ -246,6 +248,7 @@ private:
     QHash<QGLContextResource *, void *> m_resources;
     QGLSharedResourceGuard *m_guards; // double-linked list of active guards.
     QAtomicInt m_refs;
+    QGLDDSCache m_dds_cache;
 
     void cleanupResources(const QGLContext *ctx);
 
@@ -328,6 +331,7 @@ public:
     GLint max_texture_size;
 
     GLuint current_fbo;
+    GLuint default_fbo;
     QPaintEngine *active_engine;
 
     static inline QGLContextGroup *contextGroup(const QGLContext *ctx) { return ctx->d_ptr->group; }
@@ -376,7 +380,11 @@ public:
         PixelBufferObject       = 0x00000800,
         FramebufferBlit         = 0x00001000,
         NPOTTextures            = 0x00002000,
-        BGRATextureFormat       = 0x00004000
+        BGRATextureFormat       = 0x00004000,
+        DDSTextureCompression   = 0x00008000,
+        ETC1TextureCompression  = 0x00010000,
+        PVRTCTextureCompression = 0x00020000,
+        FragmentShader          = 0x00040000
     };
     Q_DECLARE_FLAGS(Extensions, Extension)
 
@@ -389,7 +397,7 @@ public:
 Q_DECLARE_OPERATORS_FOR_FLAGS(QGLExtensions::Extensions)
 
 
-class Q_AUTOTEST_EXPORT QGLShareRegister
+class Q_OPENGL_EXPORT QGLShareRegister
 {
 public:
     QGLShareRegister() {}
@@ -481,6 +489,14 @@ public:
     QPixmapData* boundPixmap;
 #endif
 
+    bool canBindCompressedTexture
+        (const char *buf, int len, const char *format, bool *hasAlpha);
+    QSize bindCompressedTexture
+        (const QString& fileName, const char *format = 0);
+    QSize bindCompressedTexture
+        (const char *buf, int len, const char *format = 0);
+    QSize bindCompressedTextureDDS(const char *buf, int len);
+    QSize bindCompressedTexturePVR(const char *buf, int len);
 };
 
 class QGLTextureCache {
@@ -517,7 +533,8 @@ bool qt_gl_preferGL2Engine();
 
 inline GLenum qt_gl_preferredTextureFormat()
 {
-    return QSysInfo::ByteOrder == QSysInfo::BigEndian ? GL_RGBA : GL_BGRA;
+    return (QGLExtensions::glExtensions & QGLExtensions::BGRATextureFormat) && QSysInfo::ByteOrder == QSysInfo::LittleEndian
+        ? GL_BGRA : GL_RGBA;
 }
 
 inline GLenum qt_gl_preferredTextureTarget()
diff --git a/src/opengl/qgl_x11egl.cpp b/src/opengl/qgl_x11egl.cpp
index b51c239..a868e83 100644
--- a/src/opengl/qgl_x11egl.cpp
+++ b/src/opengl/qgl_x11egl.cpp
@@ -63,6 +63,7 @@ void qt_egl_add_platform_config(QEglProperties& props, QPaintDevice *device)
         props.setPixelFormat(static_cast<QImage *>(device)->format());
 }
 
+// Chooses the EGL config and creates the EGL context
 bool QGLContext::chooseContext(const QGLContext* shareContext)
 {
     Q_D(QGLContext);
@@ -73,56 +74,74 @@ bool QGLContext::chooseContext(const QGLContext* shareContext)
     int devType = device()->devType();
 
     // Get the display and initialize it.
-    d->eglContext = new QEglContext();
-    d->eglContext->setApi(QEgl::OpenGL);
-    if (!d->eglContext->openDisplay(device())) {
-        delete d->eglContext;
-        d->eglContext = 0;
-        return false;
-    }
+    if (d->eglContext == 0) {
+        d->eglContext = new QEglContext();
+        d->eglContext->setApi(QEgl::OpenGL);
+        if (!d->eglContext->openDisplay(device())) {
+            delete d->eglContext;
+            d->eglContext = 0;
+            return false;
+        }
 
-    // Construct the configuration we need for this surface.
-    QEglProperties configProps;
-    qt_egl_set_format(configProps, devType, d->glFormat);
-    qt_egl_add_platform_config(configProps, device());
-    configProps.setRenderableType(QEgl::OpenGL);
-
-    QEgl::PixelFormatMatch matchType = QEgl::BestPixelFormat;
-    if (device()->depth() == 16) {
-        configProps.setValue(EGL_RED_SIZE, 5);
-        configProps.setValue(EGL_GREEN_SIZE, 6);
-        configProps.setValue(EGL_BLUE_SIZE, 5);
-        configProps.setValue(EGL_ALPHA_SIZE, 0);
-        matchType = QEgl::ExactPixelFormat;
-    }
-    configProps.setRenderableType(QEgl::OpenGL);
+        // Construct the configuration we need for this surface.
+        QEglProperties configProps;
+        qt_egl_set_format(configProps, devType, d->glFormat);
+        qt_egl_add_platform_config(configProps, device());
+        configProps.setRenderableType(QEgl::OpenGL);
+
+#if We_have_an_EGL_library_which_bothers_to_check_EGL_BUFFER_SIZE
+        if (device()->depth() == 16 && configProps.value(EGL_ALPHA_SIZE) <= 0) {
+            qDebug("Setting EGL_BUFFER_SIZE to 16");
+            configProps.setValue(EGL_BUFFER_SIZE, 16);
+            configProps.setValue(EGL_ALPHA_SIZE, 0);
+        }
 
-    // Search for a matching configuration, reducing the complexity
-    // each time until we get something that matches.
-    if (!d->eglContext->chooseConfig(configProps, matchType)) {
-        delete d->eglContext;
-        d->eglContext = 0;
-        return false;
-    }
+        if (!d->eglContext->chooseConfig(configProps, QEgl::BestPixelFormat)) {
+            delete d->eglContext;
+            d->eglContext = 0;
+            return false;
+        }
+#else
+        QEgl::PixelFormatMatch matchType = QEgl::BestPixelFormat;
+        if ((device()->depth() == 16) && configProps.value(EGL_ALPHA_SIZE) == 0) {
+            configProps.setValue(EGL_RED_SIZE, 5);
+            configProps.setValue(EGL_GREEN_SIZE, 6);
+            configProps.setValue(EGL_BLUE_SIZE, 5);
+            configProps.setValue(EGL_ALPHA_SIZE, 0);
+            matchType = QEgl::ExactPixelFormat;
+        }
 
-    // Inform the higher layers about the actual format properties.
-    qt_egl_update_format(*(d->eglContext), d->glFormat);
+        // Search for a matching configuration, reducing the complexity
+        // each time until we get something that matches.
+        if (!d->eglContext->chooseConfig(configProps, matchType)) {
+            delete d->eglContext;
+            d->eglContext = 0;
+            return false;
+        }
+#endif
 
-    // Create a new context for the configuration.
-    if (!d->eglContext->createContext
-            (shareContext ? shareContext->d_func()->eglContext : 0)) {
-        delete d->eglContext;
-        d->eglContext = 0;
-        return false;
-    }
-    d->sharing = d->eglContext->isSharing();
-    if (d->sharing && shareContext)
-        const_cast<QGLContext *>(shareContext)->d_func()->sharing = true;
+//        qDebug("QGLContext::chooseContext() - using EGL config %d:", d->eglContext->config());
+//        qDebug() << QEglProperties(d->eglContext->config()).toString();
+
+        // Create a new context for the configuration.
+        if (!d->eglContext->createContext
+                (shareContext ? shareContext->d_func()->eglContext : 0)) {
+            delete d->eglContext;
+            d->eglContext = 0;
+            return false;
+        }
+        d->sharing = d->eglContext->isSharing();
+        if (d->sharing && shareContext)
+            const_cast<QGLContext *>(shareContext)->d_func()->sharing = true;
 
 #if defined(EGL_VERSION_1_1)
-    if (d->glFormat.swapInterval() != -1 && devType == QInternal::Widget)
-        eglSwapInterval(d->eglContext->display(), d->glFormat.swapInterval());
+        if (d->glFormat.swapInterval() != -1 && devType == QInternal::Widget)
+            eglSwapInterval(d->eglContext->display(), d->glFormat.swapInterval());
 #endif
+    }
+
+    // Inform the higher layers about the actual format properties.
+    qt_egl_update_format(*(d->eglContext), d->glFormat);
 
     return true;
 }
@@ -160,6 +179,9 @@ bool qt_egl_setup_x11_visual(XVisualInfo &vi, EGLDisplay display, EGLConfig conf
 
     memset(&vi, 0, sizeof(XVisualInfo));
 
+    EGLint eglConfigColorSize;
+    eglGetConfigAttrib(display, config, EGL_BUFFER_SIZE, &eglConfigColorSize);
+
     // Check to see if EGL is suggesting an appropriate visual id:
     EGLint nativeVisualId;
     eglGetConfigAttrib(display, config, EGL_NATIVE_VISUAL_ID, &nativeVisualId);
@@ -189,8 +211,12 @@ bool qt_egl_setup_x11_visual(XVisualInfo &vi, EGLDisplay display, EGLConfig conf
             } else
 #endif
             {
-//                qDebug("Using opaque X Visual ID (%d) provided by EGL", (int)vi.visualid);
-                vi = *chosenVisualInfo;
+                if (eglConfigColorSize == chosenVisualInfo->depth) {
+//                    qDebug("Using opaque X Visual ID (%d) provided by EGL", (int)vi.visualid);
+                    vi = *chosenVisualInfo;
+                } else
+                    qWarning("Warning: EGL suggested using X visual ID %d (%d bpp) for config %d (%d bpp), but the depths do not match!",
+                             nativeVisualId, chosenVisualInfo->depth, (int)config, eglConfigColorSize);
             }
             XFree(chosenVisualInfo);
         }
@@ -300,6 +326,8 @@ void QGLWidget::setContext(QGLContext *context, const QGLContext* shareContext,
 
     bool createFailed = false;
     if (!d->glcx->isValid()) {
+        // Create the QGLContext here, which in turn chooses the EGL config
+        // and creates the EGL context:
         if (!d->glcx->create(shareContext ? shareContext : oldcx))
             createFailed = true;
     }
diff --git a/src/opengl/qglextensions_p.h b/src/opengl/qglextensions_p.h
index 3510765..62e216c 100644
--- a/src/opengl/qglextensions_p.h
+++ b/src/opengl/qglextensions_p.h
@@ -184,6 +184,10 @@ typedef void (APIENTRY *_glBlitFramebufferEXT) (int srcX0, int srcY0, int srcX1,
 typedef void (APIENTRY *_glRenderbufferStorageMultisampleEXT) (GLenum target, GLsizei samples,
                                                                GLenum internalformat, GLsizei width, GLsizei height);
 
+// ARB_texture_compression
+typedef void (APIENTRY *_glCompressedTexImage2DARB) (GLenum, GLint, GLenum, GLsizei,
+                                                     GLsizei, GLint, GLsizei, const GLvoid *);
+
 QT_BEGIN_NAMESPACE
 
 struct QGLExtensionFuncs
@@ -289,6 +293,11 @@ struct QGLExtensionFuncs
 #endif
         qt_glMapBufferARB = 0;
         qt_glUnmapBufferARB = 0;
+
+#if !defined(QT_OPENGL_ES)
+        // Texture compression
+        qt_glCompressedTexImage2DARB = 0;
+#endif
     }
 
 
@@ -397,6 +406,10 @@ struct QGLExtensionFuncs
     _glMapBufferARB qt_glMapBufferARB;
     _glUnmapBufferARB qt_glUnmapBufferARB;
 
+#if !defined(QT_OPENGL_ES)
+    // Texture compression
+    _glCompressedTexImage2DARB qt_glCompressedTexImage2DARB;
+#endif
 };
 
 
@@ -732,6 +745,10 @@ struct QGLExtensionFuncs
 #define glClearDepth glClearDepthf
 #endif
 
+#if !defined(QT_OPENGL_ES)
+#define glCompressedTexImage2D QGLContextPrivate::extensionFuncs(ctx).qt_glCompressedTexImage2DARB
+#endif
+
 extern bool qt_resolve_framebufferobject_extensions(QGLContext *ctx);
 bool qt_resolve_buffer_extensions(QGLContext *ctx);
 
diff --git a/src/opengl/qglframebufferobject.cpp b/src/opengl/qglframebufferobject.cpp
index d79283e..d0297c9 100644
--- a/src/opengl/qglframebufferobject.cpp
+++ b/src/opengl/qglframebufferobject.cpp
@@ -899,8 +899,8 @@ bool QGLFramebufferObject::release()
 #endif
 
     if (current) {
-        current->d_ptr->current_fbo = 0;
-        glBindFramebuffer(GL_FRAMEBUFFER_EXT, 0);
+        current->d_ptr->current_fbo = current->d_ptr->default_fbo;
+        glBindFramebuffer(GL_FRAMEBUFFER_EXT, current->d_ptr->default_fbo);
     }
 
     return true;
diff --git a/src/opengl/qglpaintdevice.cpp b/src/opengl/qglpaintdevice.cpp
index 2867de5..bcd90a5 100644
--- a/src/opengl/qglpaintdevice.cpp
+++ b/src/opengl/qglpaintdevice.cpp
@@ -89,6 +89,12 @@ void QGLPaintDevice::beginPaint()
         ctx->d_ptr->current_fbo = m_thisFBO;
         glBindFramebuffer(GL_FRAMEBUFFER_EXT, m_thisFBO);
     }
+
+    // Set the default fbo for the context to m_thisFBO so that
+    // if some raw GL code between beginNativePainting() and
+    // endNativePainting() calls QGLFramebufferObject::release(),
+    // painting will revert to the window surface's fbo.
+    ctx->d_ptr->default_fbo = m_thisFBO;
 }
 
 void QGLPaintDevice::ensureActiveTarget()
@@ -101,6 +107,8 @@ void QGLPaintDevice::ensureActiveTarget()
         ctx->d_ptr->current_fbo = m_thisFBO;
         glBindFramebuffer(GL_FRAMEBUFFER_EXT, m_thisFBO);
     }
+
+    ctx->d_ptr->default_fbo = m_thisFBO;
 }
 
 void QGLPaintDevice::endPaint()
@@ -111,6 +119,8 @@ void QGLPaintDevice::endPaint()
         ctx->d_ptr->current_fbo = m_previousFBO;
         glBindFramebuffer(GL_FRAMEBUFFER_EXT, m_previousFBO);
     }
+
+    ctx->d_ptr->default_fbo = 0;
 }
 
 QGLFormat QGLPaintDevice::format() const
diff --git a/src/opengl/qpixmapdata_gl.cpp b/src/opengl/qpixmapdata_gl.cpp
index fb55097..4e1d50d 100644
--- a/src/opengl/qpixmapdata_gl.cpp
+++ b/src/opengl/qpixmapdata_gl.cpp
@@ -53,6 +53,8 @@
 #include <private/qpaintengineex_opengl2_p.h>
 
 #include <qdesktopwidget.h>
+#include <qfile.h>
+#include <qimagereader.h>
 
 QT_BEGIN_NAMESPACE
 
@@ -321,25 +323,47 @@ void QGLPixmapData::ensureCreated() const
     QGLShareContextScope ctx(qt_gl_share_widget()->context());
     m_ctx = ctx;
 
-    const GLenum format = qt_gl_preferredTextureFormat();
+    const GLenum internal_format = m_hasAlpha ? GL_RGBA : GL_RGB;
+#ifdef QT_OPENGL_ES_2
+    const GLenum external_format = internal_format;
+#else
+    const GLenum external_format = qt_gl_preferredTextureFormat();
+#endif
     const GLenum target = GL_TEXTURE_2D;
 
     if (!m_texture.id) {
         glGenTextures(1, &m_texture.id);
         glBindTexture(target, m_texture.id);
-        GLenum format = m_hasAlpha ? GL_RGBA : GL_RGB;
-        glTexImage2D(target, 0, format, w, h, 0,
-                GL_RGBA, GL_UNSIGNED_BYTE, 0);
+        glTexImage2D(target, 0, internal_format, w, h, 0, external_format, GL_UNSIGNED_BYTE, 0);
         glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
         glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
     }
 
     if (!m_source.isNull()) {
-        const QImage tx = ctx->d_func()->convertToGLFormat(m_source, true, format);
+        if (external_format == GL_RGB) {
+            QImage tx = m_source.convertToFormat(QImage::Format_RGB32);
+
+            QVector<uchar> pixelData(w * h * 3);
+            uchar *p = &pixelData[0];
+            QRgb *src = (QRgb *)tx.bits();
+
+            for (int i = 0; i < w * h; ++i) {
+                *p++ = qRed(*src);
+                *p++ = qGreen(*src);
+                *p++ = qBlue(*src);
+                ++src;
+            }
 
-        glBindTexture(target, m_texture.id);
-        glTexSubImage2D(target, 0, 0, 0, w, h, format,
-                        GL_UNSIGNED_BYTE, tx.bits());
+            glBindTexture(target, m_texture.id);
+            glTexSubImage2D(target, 0, 0, 0, w, h, external_format,
+                            GL_UNSIGNED_BYTE, &pixelData[0]);
+        } else {
+            const QImage tx = ctx->d_func()->convertToGLFormat(m_source, true, external_format);
+
+            glBindTexture(target, m_texture.id);
+            glTexSubImage2D(target, 0, 0, 0, w, h, external_format,
+                            GL_UNSIGNED_BYTE, tx.bits());
+        }
 
         if (useFramebufferObjects())
             m_source = QImage();
@@ -385,6 +409,63 @@ void QGLPixmapData::fromImage(const QImage &image,
     }
 }
 
+bool QGLPixmapData::fromFile(const QString &filename, const char *format,
+                             Qt::ImageConversionFlags flags)
+{
+    if (pixelType() == QPixmapData::BitmapType)
+        return QPixmapData::fromFile(filename, format, flags);
+    QFile file(filename);
+    if (!file.open(QIODevice::ReadOnly))
+        return false;
+    QByteArray data = file.peek(64);
+    bool alpha;
+    if (m_texture.canBindCompressedTexture
+            (data.constData(), data.size(), format, &alpha)) {
+        resize(0, 0);
+        data = file.readAll();
+        file.close();
+        QGLShareContextScope ctx(qt_gl_share_widget()->context());
+        QSize size = m_texture.bindCompressedTexture
+            (data.constData(), data.size(), format);
+        if (!size.isEmpty()) {
+            w = size.width();
+            h = size.height();
+            is_null = false;
+            d = 32;
+            m_hasAlpha = alpha;
+            m_source = QImage();
+            m_dirty = isValid();
+            return true;
+        }
+        return false;
+    }
+    fromImage(QImageReader(&file, format).read(), flags);
+    return !isNull();
+}
+
+bool QGLPixmapData::fromData(const uchar *buffer, uint len, const char *format,
+                             Qt::ImageConversionFlags flags)
+{
+    bool alpha;
+    const char *buf = reinterpret_cast<const char *>(buffer);
+    if (m_texture.canBindCompressedTexture(buf, int(len), format, &alpha)) {
+        resize(0, 0);
+        QGLShareContextScope ctx(qt_gl_share_widget()->context());
+        QSize size = m_texture.bindCompressedTexture(buf, int(len), format);
+        if (!size.isEmpty()) {
+            w = size.width();
+            h = size.height();
+            is_null = false;
+            d = 32;
+            m_hasAlpha = alpha;
+            m_source = QImage();
+            m_dirty = isValid();
+            return true;
+        }
+    }
+    return QPixmapData::fromData(buffer, len, format, flags);
+}
+
 bool QGLPixmapData::scroll(int dx, int dy, const QRect &rect)
 {
     Q_UNUSED(dx);
diff --git a/src/opengl/qpixmapdata_gl_p.h b/src/opengl/qpixmapdata_gl_p.h
index 8a13e03..007c52a 100644
--- a/src/opengl/qpixmapdata_gl_p.h
+++ b/src/opengl/qpixmapdata_gl_p.h
@@ -106,6 +106,10 @@ public:
     // Re-implemented from QPixmapData:
     void resize(int width, int height);
     void fromImage(const QImage &image, Qt::ImageConversionFlags flags);
+    bool fromFile(const QString &filename, const char *format,
+                  Qt::ImageConversionFlags flags);
+    bool fromData(const uchar *buffer, uint len, const char *format,
+                  Qt::ImageConversionFlags flags);
     void copy(const QPixmapData *data, const QRect &rect);
     bool scroll(int dx, int dy, const QRect &rect);
     void fill(const QColor &color);
diff --git a/src/opengl/qwindowsurface_gl.cpp b/src/opengl/qwindowsurface_gl.cpp
index e353f5d..7194f9d 100644
--- a/src/opengl/qwindowsurface_gl.cpp
+++ b/src/opengl/qwindowsurface_gl.cpp
@@ -493,7 +493,6 @@ void QGLWindowSurface::flush(QWidget *widget, const QRegion &rgn, const QPoint &
             }
 #endif
             d_ptr->paintedRegion = QRegion();
-
             context()->swapBuffers();
         } else {
             glFlush();
@@ -688,11 +687,13 @@ void QGLWindowSurface::updateGeometry() {
     d_ptr->size = rect.size();
 
     if (d_ptr->ctx) {
+#ifndef QT_OPENGL_ES_2
         if (d_ptr->destructive_swap_buffers) {
             glBindTexture(target, d_ptr->tex_id);
             glTexImage2D(target, 0, GL_RGBA, rect.width(), rect.height(), 0, GL_RGB, GL_UNSIGNED_BYTE, 0);
             glBindTexture(target, 0);
         }
+#endif
         return;
     }
 
@@ -756,11 +757,7 @@ void QGLWindowSurface::updateGeometry() {
 
             glMatrixMode(GL_PROJECTION);
             glLoadIdentity();
-#ifndef QT_OPENGL_ES
             glOrtho(0, d_ptr->pb->width(), d_ptr->pb->height(), 0, -999999, 999999);
-#else
-            glOrthof(0, d_ptr->pb->width(), d_ptr->pb->height(), 0, -999999, 999999);
-#endif
 
             d_ptr->pb->d_ptr->qctx->d_func()->internal_context = true;
             return;
@@ -774,6 +771,7 @@ void QGLWindowSurface::updateGeometry() {
 
     ctx->makeCurrent();
 
+#ifndef QT_OPENGL_ES_2
     if (d_ptr->destructive_swap_buffers) {
         glGenTextures(1, &d_ptr->tex_id);
         glBindTexture(target, d_ptr->tex_id);
@@ -783,6 +781,7 @@ void QGLWindowSurface::updateGeometry() {
         glTexParameterf(target, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
         glBindTexture(target, 0);
     }
+#endif
 
     qDebug() << "QGLWindowSurface: Using plain widget as window surface" << this;;
     d_ptr->ctx = ctx;
diff --git a/src/openvg/qpixmapdata_vg.cpp b/src/openvg/qpixmapdata_vg.cpp
index 19c90ed..5d5fcbf 100644
--- a/src/openvg/qpixmapdata_vg.cpp
+++ b/src/openvg/qpixmapdata_vg.cpp
@@ -65,12 +65,21 @@ QVGPixmapData::QVGPixmapData(PixelType type)
     recreate = true;
 #if !defined(QT_NO_EGL)
     context = 0;
+    qt_vg_register_pixmap(this);
 #endif
     setSerialNumber(++qt_vg_pixmap_serial);
 }
 
 QVGPixmapData::~QVGPixmapData()
 {
+    destroyImageAndContext();
+#if !defined(QT_NO_EGL)
+    qt_vg_unregister_pixmap(this);
+#endif
+}
+
+void QVGPixmapData::destroyImageAndContext()
+{
     if (vgImage != VG_INVALID_HANDLE) {
         // We need to have a context current to destroy the image.
 #if !defined(QT_NO_EGL)
@@ -93,11 +102,16 @@ QVGPixmapData::~QVGPixmapData()
         if (vgImageOpacity != VG_INVALID_HANDLE)
             vgDestroyImage(vgImageOpacity);
 #endif
+        vgImage = VG_INVALID_HANDLE;
+        vgImageOpacity = VG_INVALID_HANDLE;
     }
 #if !defined(QT_NO_EGL)
-    if (context)
-        qt_vg_destroy_context(context);
+    if (context) {
+        qt_vg_destroy_context(context, QInternal::Pixmap);
+        context = 0;
+    }
 #endif
+    recreate = true;
 }
 
 QPixmapData *QVGPixmapData::createCompatiblePixmapData() const
@@ -217,7 +231,7 @@ VGImage QVGPixmapData::toVGImage()
 #if !defined(QT_NO_EGL)
     // Increase the reference count on the shared context.
     if (!context)
-        context = qt_vg_create_context(0);
+        context = qt_vg_create_context(0, QInternal::Pixmap);
 #endif
 
     if (recreate && prevSize != QSize(w, h)) {
@@ -286,6 +300,17 @@ VGImage QVGPixmapData::toVGImage(qreal opacity)
 #endif
 }
 
+void QVGPixmapData::hibernate()
+{
+    // If the image was imported (e.g, from an SgImage under Symbian),
+    // then we cannot copy it back to main memory for storage.
+    if (vgImage != VG_INVALID_HANDLE && source.isNull())
+        return;
+
+    forceToImage();
+    destroyImageAndContext();
+}
+
 extern int qt_defaultDpiX();
 extern int qt_defaultDpiY();
 
@@ -376,7 +401,7 @@ void QVGPixmapData::fromNativeType(void* pixmap, NativeType type)
         // when "0" used as argument then
         // default display, context are used
         if (!context)
-            context = qt_vg_create_context(0);
+            context = qt_vg_create_context(0, QInternal::Pixmap);
 
         if (vgImage != VG_INVALID_HANDLE) {
             vgDestroyImage(vgImage);
diff --git a/src/openvg/qpixmapdata_vg_p.h b/src/openvg/qpixmapdata_vg_p.h
index fe19f35..c0bb098 100644
--- a/src/openvg/qpixmapdata_vg_p.h
+++ b/src/openvg/qpixmapdata_vg_p.h
@@ -55,8 +55,6 @@
 
 #include <QtGui/private/qpixmap_raster_p.h>
 #include <private/qvg_p.h>
-#if !defined(QT_NO_EGL)
-#endif
 
 #if defined(Q_OS_SYMBIAN)
 class RSGImage;
@@ -66,6 +64,15 @@ QT_BEGIN_NAMESPACE
 
 class QEglContext;
 
+#if !defined(QT_NO_EGL)
+class QVGPixmapData;
+class QVGSharedContext;
+
+void qt_vg_register_pixmap(QVGPixmapData *pd);
+void qt_vg_unregister_pixmap(QVGPixmapData *pd);
+void qt_vg_hibernate_pixmaps(QVGSharedContext *context);
+#endif
+
 class Q_OPENVG_EXPORT QVGPixmapData : public QPixmapData
 {
 public:
@@ -94,6 +101,14 @@ public:
     // Return the VGImage form for a specific opacity setting.
     virtual VGImage toVGImage(qreal opacity);
 
+    // Release the VG resources associated with this pixmap and copy
+    // the pixmap's contents out of the GPU back into main memory.
+    // The VG resource will be automatically recreated the next time
+    // toVGImage() is called.  Does nothing if the pixmap cannot be
+    // hibernated for some reason (e.g. VGImage is shared with another
+    // process via a SgImage).
+    virtual void hibernate();
+
     QSize size() const { return QSize(w, h); }
 
 #if defined(Q_OS_SYMBIAN)
@@ -108,6 +123,16 @@ protected:
     void cleanup();
 #endif
 
+#if !defined(QT_NO_EGL)
+private:
+    QVGPixmapData *next;
+    QVGPixmapData *prev;
+
+    friend void qt_vg_register_pixmap(QVGPixmapData *pd);
+    friend void qt_vg_unregister_pixmap(QVGPixmapData *pd);
+    friend void qt_vg_hibernate_pixmaps(QVGSharedContext *context);
+#endif
+
 protected:
     QSize prevSize;
     VGImage vgImage;
@@ -121,6 +146,8 @@ protected:
 
     void forceToImage();
     QImage::Format sourceFormat() const;
+
+    void destroyImageAndContext();
 };
 
 QT_END_NAMESPACE
diff --git a/src/openvg/qvg_p.h b/src/openvg/qvg_p.h
index 04e2bab..3577013 100644
--- a/src/openvg/qvg_p.h
+++ b/src/openvg/qvg_p.h
@@ -71,11 +71,17 @@ class QEglContext;
 
 // Create an EGL context, but don't bind it to a surface.  If single-context
 // mode is enabled, this will return the previously-created context.
-Q_OPENVG_EXPORT QEglContext *qt_vg_create_context(QPaintDevice *device);
+// "devType" indicates the type of device using the context, usually
+// QInternal::Widget or QInternal::Pixmap.
+Q_OPENVG_EXPORT QEglContext *qt_vg_create_context
+    (QPaintDevice *device, int devType);
 
 // Destroy an EGL context that was created by qt_vg_create_context().
 // If single-context mode is enabled, this will decrease the reference count.
-Q_OPENVG_EXPORT void qt_vg_destroy_context(QEglContext *context);
+// "devType" indicates the type of device destroying the context, usually
+// QInternal::Widget or QInternal::Pixmap.
+Q_OPENVG_EXPORT void qt_vg_destroy_context
+    (QEglContext *context, int devType);
 
 // Return the shared pbuffer surface that can be made current to
 // destroy VGImage objects when there is no other surface available.
diff --git a/src/openvg/qwindowsurface_vgegl.cpp b/src/openvg/qwindowsurface_vgegl.cpp
index 62871cf..1571083 100644
--- a/src/openvg/qwindowsurface_vgegl.cpp
+++ b/src/openvg/qwindowsurface_vgegl.cpp
@@ -111,15 +111,19 @@ public:
 
     QEglContext *context;
     int refCount;
+    int widgetRefCount;
     QVGPaintEngine *engine;
     EGLSurface surface;
+    QVGPixmapData *firstPixmap;
 };
 
 QVGSharedContext::QVGSharedContext()
     : context(0)
     , refCount(0)
+    , widgetRefCount(0)
     , engine(0)
     , surface(EGL_NO_SURFACE)
+    , firstPixmap(0)
 {
 }
 
@@ -154,6 +158,28 @@ void qt_vg_destroy_paint_engine(QVGPaintEngine *engine)
     Q_UNUSED(engine);
 }
 
+void qt_vg_register_pixmap(QVGPixmapData *pd)
+{
+    QVGSharedContext *shared = sharedContext();
+    pd->next = shared->firstPixmap;
+    pd->prev = 0;
+    if (shared->firstPixmap)
+        shared->firstPixmap->prev = pd;
+    shared->firstPixmap = pd;
+}
+
+void qt_vg_unregister_pixmap(QVGPixmapData *pd)
+{
+    if (pd->next)
+        pd->next->prev = pd->prev;
+    if (pd->prev) {
+        pd->prev->next = pd->next;
+    } else {
+        QVGSharedContext *shared = sharedContext();
+        shared->firstPixmap = pd->next;
+    }
+}
+
 #else
 
 QVGPaintEngine *qt_vg_create_paint_engine(void)
@@ -166,6 +192,16 @@ void qt_vg_destroy_paint_engine(QVGPaintEngine *engine)
     delete engine;
 }
 
+void qt_vg_register_pixmap(QVGPixmapData *pd)
+{
+    Q_UNUSED(pd);
+}
+
+void qt_vg_unregister_pixmap(QVGPixmapData *pd)
+{
+    Q_UNUSED(pd);
+}
+
 #endif
 
 #ifdef EGL_VG_ALPHA_FORMAT_PRE_BIT
@@ -278,9 +314,11 @@ static QEglContext *createContext(QPaintDevice *device)
 
 #if !defined(QVG_NO_SINGLE_CONTEXT)
 
-QEglContext *qt_vg_create_context(QPaintDevice *device)
+QEglContext *qt_vg_create_context(QPaintDevice *device, int devType)
 {
     QVGSharedContext *shared = sharedContext();
+    if (devType == QInternal::Widget)
+        ++(shared->widgetRefCount);
     if (shared->context) {
         ++(shared->refCount);
         return shared->context;
@@ -291,23 +329,65 @@ QEglContext *qt_vg_create_context(QPaintDevice *device)
     }
 }
 
-void qt_vg_destroy_context(QEglContext *context)
+static void qt_vg_destroy_shared_context(QVGSharedContext *shared)
+{
+    shared->context->makeCurrent(qt_vg_shared_surface());
+    delete shared->engine;
+    shared->engine = 0;
+    shared->context->doneCurrent();
+    if (shared->surface != EGL_NO_SURFACE) {
+        eglDestroySurface(shared->context->display(), shared->surface);
+        shared->surface = EGL_NO_SURFACE;
+    }
+    delete shared->context;
+    shared->context = 0;
+}
+
+void qt_vg_hibernate_pixmaps(QVGSharedContext *shared)
+{
+    // Artificially increase the reference count to prevent the
+    // context from being destroyed until after we have finished
+    // the hibernation process.
+    ++(shared->refCount);
+
+    // We need a context current to hibernate the VGImage objects.
+    shared->context->makeCurrent(qt_vg_shared_surface());
+
+    // Scan all QVGPixmapData objects in the system and hibernate them.
+    QVGPixmapData *pd = shared->firstPixmap;
+    while (pd != 0) {
+        pd->hibernate();
+        pd = pd->next;
+    }
+
+    // Don't need the current context any more.
+    shared->context->lazyDoneCurrent();
+
+    // Decrease the reference count and destroy the context if necessary.
+    if (--(shared->refCount) <= 0)
+        qt_vg_destroy_shared_context(shared);
+}
+
+void qt_vg_destroy_context(QEglContext *context, int devType)
 {
     QVGSharedContext *shared = sharedContext();
     if (shared->context != context) {
         // This is not the shared context.  Shouldn't happen!
         delete context;
-    } else if (--(shared->refCount) <= 0) {
-        shared->context->makeCurrent(qt_vg_shared_surface());
-        delete shared->engine;
-        shared->engine = 0;
-        shared->context->doneCurrent();
-        if (shared->surface != EGL_NO_SURFACE) {
-            eglDestroySurface(shared->context->display(), shared->surface);
-            shared->surface = EGL_NO_SURFACE;
-        }
-        delete shared->context;
-        shared->context = 0;
+        return;
+    }
+    if (devType == QInternal::Widget)
+        --(shared->widgetRefCount);
+    if (--(shared->refCount) <= 0) {
+        qt_vg_destroy_shared_context(shared);
+    } else if (shared->widgetRefCount <= 0 && devType == QInternal::Widget) {
+        // All of the widget window surfaces have been destroyed
+        // but we still have VG pixmaps active.  Ask them to hibernate
+        // to free up GPU resources until a widget is shown again.
+        // This may eventually cause the EGLContext to be destroyed
+        // because nothing in the system needs a context, which will
+        // free up even more GPU resources.
+        qt_vg_hibernate_pixmaps(shared);
     }
 }
 
@@ -338,13 +418,15 @@ EGLSurface qt_vg_shared_surface(void)
 
 #else
 
-QEglContext *qt_vg_create_context(QPaintDevice *device)
+QEglContext *qt_vg_create_context(QPaintDevice *device, int devType)
 {
+    Q_UNUSED(devType);
     return createContext(device);
 }
 
-void qt_vg_destroy_context(QEglContext *context)
+void qt_vg_destroy_context(QEglContext *context, int devType)
 {
+    Q_UNUSED(devType);
     delete context;
 }
 
@@ -434,7 +516,7 @@ QVGEGLWindowSurfaceVGImage::~QVGEGLWindowSurfaceVGImage()
         }
         if (windowSurface != EGL_NO_SURFACE)
             context->destroySurface(windowSurface);
-        qt_vg_destroy_context(context);
+        qt_vg_destroy_context(context, QInternal::Widget);
     }
 }
 
@@ -453,7 +535,7 @@ QEglContext *QVGEGLWindowSurfaceVGImage::ensureContext(QWidget *widget)
     if (!context) {
         // Create a new EGL context.  We create the surface in beginPaint().
         size = newSize;
-        context = qt_vg_create_context(widget);
+        context = qt_vg_create_context(widget, QInternal::Widget);
         if (!context)
             return 0;
         isPaintingActive = false;
@@ -548,7 +630,7 @@ QVGEGLWindowSurfaceDirect::~QVGEGLWindowSurfaceDirect()
     if (context) {
         if (windowSurface != EGL_NO_SURFACE)
             context->destroySurface(windowSurface);
-        qt_vg_destroy_context(context);
+        qt_vg_destroy_context(context, QInternal::Widget);
     }
 }
 
@@ -587,7 +669,7 @@ QEglContext *QVGEGLWindowSurfaceDirect::ensureContext(QWidget *widget)
         qt_vg_destroy_paint_engine(engine);
         engine = 0;
         context->destroySurface(windowSurface);
-        qt_vg_destroy_context(context);
+        qt_vg_destroy_context(context, QInternal::Widget);
         context = 0;
         windowSurface = EGL_NO_SURFACE;
     }
@@ -596,7 +678,7 @@ QEglContext *QVGEGLWindowSurfaceDirect::ensureContext(QWidget *widget)
     if (!context) {
         // Create a new EGL context and bind it to the widget surface.
         size = newSize;
-        context = qt_vg_create_context(widget);
+        context = qt_vg_create_context(widget, QInternal::Widget);
         if (!context)
             return 0;
         // We want a direct to window rendering surface if possible.
@@ -613,7 +695,7 @@ QEglContext *QVGEGLWindowSurfaceDirect::ensureContext(QWidget *widget)
 #endif
         EGLSurface surface = context->createSurface(widget, &surfaceProps);
         if (surface == EGL_NO_SURFACE) {
-            qt_vg_destroy_context(context);
+            qt_vg_destroy_context(context, QInternal::Widget);
             context = 0;
             return 0;
         }
diff --git a/src/plugins/qpluginbase.pri b/src/plugins/qpluginbase.pri
index a3abc98..b66f8f9 100644
--- a/src/plugins/qpluginbase.pri
+++ b/src/plugins/qpluginbase.pri
@@ -1,6 +1,6 @@
 TEMPLATE = lib
 isEmpty(QT_MAJOR_VERSION) {
-   VERSION=4.6.0
+   VERSION=4.6.1
 } else {
    VERSION=$${QT_MAJOR_VERSION}.$${QT_MINOR_VERSION}.$${QT_PATCH_VERSION}
 }
diff --git a/src/plugins/sqldrivers/sqldrivers.pro b/src/plugins/sqldrivers/sqldrivers.pro
index 2bd5f2c..83d71e4 100644
--- a/src/plugins/sqldrivers/sqldrivers.pro
+++ b/src/plugins/sqldrivers/sqldrivers.pro
@@ -10,6 +10,4 @@ contains(sql-plugins, sqlite)	: SUBDIRS += sqlite
 contains(sql-plugins, sqlite2)	: SUBDIRS += sqlite2
 contains(sql-plugins, ibase)	: SUBDIRS += ibase
 
-contains(S60_VERSION, 3.1)|contains(S60_VERSION, 3.2)|contains(S60_VERSION, 5.0) {
-    symbian:contains(CONFIG, system-sqlite): SUBDIRS += sqlite_symbian
-    }
+symbian:contains(CONFIG, system-sqlite): SUBDIRS += sqlite_symbian
diff --git a/src/qbase.pri b/src/qbase.pri
index 0aae24d..d1a2a75 100644
--- a/src/qbase.pri
+++ b/src/qbase.pri
@@ -4,7 +4,7 @@ INCLUDEPATH *= $$QMAKE_INCDIR_QT/$$TARGET #just for today to have some compat
 isEmpty(QT_ARCH):!isEmpty(ARCH):QT_ARCH=$$ARCH #another compat that will rot for change #215700
 TEMPLATE	= lib
 isEmpty(QT_MAJOR_VERSION) {
-   VERSION=4.6.0
+   VERSION=4.6.1
 } else {
    VERSION=$${QT_MAJOR_VERSION}.$${QT_MINOR_VERSION}.$${QT_PATCH_VERSION}
 }
diff --git a/src/s60installs/eabi/QtCoreu.def b/src/s60installs/eabi/QtCoreu.def
index 6a4cdbd..89fa76f 100644
--- a/src/s60installs/eabi/QtCoreu.def
+++ b/src/s60installs/eabi/QtCoreu.def
@@ -2556,7 +2556,7 @@ EXPORTS
 	_ZNK14QObjectPrivate10senderListEv @ 2555 NONAME
 	_ZNK14QObjectPrivate11signalIndexEPKc @ 2556 NONAME
 	_ZNK14QObjectPrivate12receiverListEPKc @ 2557 NONAME
-	_ZNK14QObjectPrivate17isSignalConnectedEi @ 2558 NONAME
+	_ZNK14QObjectPrivate17isSignalConnectedEi @ 2558 NONAME ABSENT
 	_ZNK14QObjectPrivate8isSenderEPK7QObjectPKc @ 2559 NONAME
 	_ZNK14QStringMatcher7indexInEPK5QCharii @ 2560 NONAME
 	_ZNK14QStringMatcher7indexInERK7QStringi @ 2561 NONAME
diff --git a/src/script/api/qscriptengine.cpp b/src/script/api/qscriptengine.cpp
index dc0e0d0..b6aa872 100644
--- a/src/script/api/qscriptengine.cpp
+++ b/src/script/api/qscriptengine.cpp
@@ -1101,16 +1101,6 @@ void QScriptEnginePrivate::mark(JSC::MarkStack& markStack)
         }
     }
 
-#ifndef QT_NO_QOBJECT
-    {
-        QHash<QObject*, QScript::QObjectData*>::const_iterator it;
-        for (it = m_qobjectData.constBegin(); it != m_qobjectData.constEnd(); ++it) {
-            QScript::QObjectData *qdata = it.value();
-            qdata->mark(markStack);
-        }
-    }
-#endif
-
     {
         QHash<int, QScriptTypeInfo*>::const_iterator it;
         for (it = m_typeInfos.constBegin(); it != m_typeInfos.constEnd(); ++it) {
@@ -1134,6 +1124,17 @@ void QScriptEnginePrivate::mark(JSC::MarkStack& markStack)
             context = context->parentContext();
         }
     }
+
+#ifndef QT_NO_QOBJECT
+    markStack.drain(); // make sure everything is marked before marking qobject data
+    {
+        QHash<QObject*, QScript::QObjectData*>::const_iterator it;
+        for (it = m_qobjectData.constBegin(); it != m_qobjectData.constEnd(); ++it) {
+            QScript::QObjectData *qdata = it.value();
+            qdata->mark(markStack);
+        }
+    }
+#endif
 }
 
 bool QScriptEnginePrivate::isCollecting() const
diff --git a/src/script/bridge/qscriptqobject.cpp b/src/script/bridge/qscriptqobject.cpp
index 559fcd3..63ba9ec 100644
--- a/src/script/bridge/qscriptqobject.cpp
+++ b/src/script/bridge/qscriptqobject.cpp
@@ -83,22 +83,23 @@ struct QObjectConnection
 
     void mark(JSC::MarkStack& markStack)
     {
-        // ### need to find out if senderWrapper is marked
         if (senderWrapper) {
-            // see if the sender should be marked or not
+            // see if the sender should be marked or not;
+            // if the C++ object is owned by script, we don't want
+            // it to stay alive due to a script connection.
             Q_ASSERT(senderWrapper.inherits(&QScriptObject::info));
             QScriptObject *scriptObject = static_cast<QScriptObject*>(JSC::asObject(senderWrapper));
-            QScriptObjectDelegate *delegate = scriptObject->delegate();
-            Q_ASSERT(delegate && (delegate->type() == QScriptObjectDelegate::QtObject));
-            QObjectDelegate *inst = static_cast<QObjectDelegate*>(delegate);
-            if ((inst->ownership() == QScriptEngine::ScriptOwnership)
-                || ((inst->ownership() == QScriptEngine::AutoOwnership)
-                    && inst->value() && !inst->value()->parent())) {
-                // #### don't mark if not marked otherwise
-                //senderWrapper = JSC::JSValue();
-                markStack.append(senderWrapper);
-            } else {
-                markStack.append(senderWrapper);
+            if (!JSC::Heap::isCellMarked(scriptObject)) {
+                QScriptObjectDelegate *delegate = scriptObject->delegate();
+                Q_ASSERT(delegate && (delegate->type() == QScriptObjectDelegate::QtObject));
+                QObjectDelegate *inst = static_cast<QObjectDelegate*>(delegate);
+                if ((inst->ownership() == QScriptEngine::ScriptOwnership)
+                    || ((inst->ownership() == QScriptEngine::AutoOwnership)
+                        && inst->value() && !inst->value()->parent())) {
+                    senderWrapper = JSC::JSValue();
+                } else {
+                    markStack.append(senderWrapper);
+                }
             }
         }
         if (receiver)
diff --git a/src/script/script.pro b/src/script/script.pro
index 008c556..771047a 100644
--- a/src/script/script.pro
+++ b/src/script/script.pro
@@ -1,7 +1,7 @@
 TARGET     = QtScript
 QPRO_PWD   = $$PWD
 QT         = core
-DEFINES   += JSC=QTJSC jscyyparse=qtjscyyparse jscyylex=qtjscyylex jscyyerror=qtjscyyerror
+DEFINES   += JSC=QTJSC jscyyparse=qtjscyyparse jscyylex=qtjscyylex jscyyerror=qtjscyyerror WTF=QTWTF
 DEFINES   += QT_BUILD_SCRIPT_LIB
 DEFINES   += QT_NO_USING_NAMESPACE
 DEFINES   += QLALR_NO_QSCRIPTGRAMMAR_DEBUG_INFO
diff --git a/src/sql/drivers/db2/qsql_db2.cpp b/src/sql/drivers/db2/qsql_db2.cpp
index 3f13405..5d039cf 100644
--- a/src/sql/drivers/db2/qsql_db2.cpp
+++ b/src/sql/drivers/db2/qsql_db2.cpp
@@ -1025,7 +1025,6 @@ QVariant QDB2Result::data(int field)
             break;
         case QVariant::Double:
             {
-            QString value=qGetStringData(d->hStmt, field, info.length() + 1, isNull);
             switch(numericalPrecisionPolicy()) {
                 case QSql::LowPrecisionInt32:
                     v = new QVariant(qGetIntData(d->hStmt, field, isNull));
diff --git a/src/sql/drivers/oci/qsql_oci.cpp b/src/sql/drivers/oci/qsql_oci.cpp
index 17f2c92..f130087 100644
--- a/src/sql/drivers/oci/qsql_oci.cpp
+++ b/src/sql/drivers/oci/qsql_oci.cpp
@@ -2200,26 +2200,34 @@ bool QOCIDriver::rollbackTransaction()
 QStringList QOCIDriver::tables(QSql::TableType type) const
 {
     QStringList tl;
+    QStringList sysUsers = QStringList() << QLatin1String("MDSYS")
+                                    << QLatin1String("LBACSYS")
+                                    << QLatin1String("SYS")
+                                    << QLatin1String("SYSTEM")
+                                    << QLatin1String("WKSYS")
+                                    << QLatin1String("CTXSYS")
+                                    << QLatin1String("WMSYS");
+
+    QString user = d->user;
+    if ( isIdentifierEscaped(user, QSqlDriver::TableName))
+        user = stripDelimiters(user, QSqlDriver::TableName);
+    else
+        user = user.toUpper();
+
+    if(sysUsers.contains(user))
+        sysUsers.removeAll(user);;
+
     if (!isOpen())
         return tl;
 
     QSqlQuery t(createResult());
     t.setForwardOnly(true);
     if (type & QSql::Tables) {
-        t.exec(QLatin1String("select owner, table_name from all_tables "
-                "where owner != 'MDSYS' "
-                "and owner != 'LBACSYS' "
-                "and owner != 'SYS' "
-                "and owner != 'SYSTEM' "
-                "and owner != 'WKSYS'"
-                "and owner != 'CTXSYS'"
-                "and owner != 'WMSYS'"));
-
-        QString user = d->user;
-        if ( isIdentifierEscaped(user, QSqlDriver::TableName))
-            user = stripDelimiters(user, QSqlDriver::TableName);
-        else
-            user = user.toUpper();
+        QString query = QLatin1String("select owner, table_name from all_tables where ");
+        QStringList whereList;
+        foreach(const QString &sysUserName, sysUsers)
+            whereList << QLatin1String("owner != '") + sysUserName + QLatin1String("' ");
+        t.exec(query + whereList.join(QLatin1String(" and ")));
 
         while (t.next()) {
             if (t.value(0).toString().toUpper() != user.toUpper())
@@ -2229,30 +2237,21 @@ QStringList QOCIDriver::tables(QSql::TableType type) const
         }
 
         // list all table synonyms as well
-        t.exec(QLatin1String("select owner, synonym_name from all_synonyms "
-                "where owner != 'MDSYS' "
-                "and owner != 'LBACSYS' "
-                "and owner != 'SYS' "
-                "and owner != 'SYSTEM' "
-                "and owner != 'WKSYS'"
-                "and owner != 'CTXSYS'"
-                "and owner != 'WMSYS'"));
+        query = QLatin1String("select owner, synonym_name from all_synonyms where ");
+        t.exec(query + whereList.join(QLatin1String(" and ")));
         while (t.next()) {
             if (t.value(0).toString() != d->user)
-                tl.append(t.value(0).toString() + QLatin1String(".") + t.value(1).toString());
+                tl.append(t.value(0).toString() + QLatin1Char('.') + t.value(1).toString());
             else
                 tl.append(t.value(1).toString());
         }
     }
     if (type & QSql::Views) {
-        t.exec(QLatin1String("select owner, view_name from all_views "
-                "where owner != 'MDSYS' "
-                "and owner != 'LBACSYS' "
-                "and owner != 'SYS' "
-                "and owner != 'SYSTEM' "
-                "and owner != 'WKSYS'"
-                "and owner != 'CTXSYS'"
-                "and owner != 'WMSYS'"));
+        QString query = QLatin1String("select owner, view_name from all_views where ");
+        QStringList whereList;
+        foreach(const QString &sysUserName, sysUsers)
+            whereList << QLatin1String("owner != '") + sysUserName + QLatin1String("' ");
+        t.exec(query + whereList.join(QLatin1String(" and ")));
         while (t.next()) {
             if (t.value(0).toString().toUpper() != d->user.toUpper())
                 tl.append(t.value(0).toString() + QLatin1Char('.') + t.value(1).toString());
@@ -2265,6 +2264,28 @@ QStringList QOCIDriver::tables(QSql::TableType type) const
         while (t.next()) {
             tl.append(t.value(0).toString());
         }
+        QString query = QLatin1String("select owner, table_name from all_tables where ");
+        QStringList whereList;
+        foreach(const QString &sysUserName, sysUsers)
+            whereList << QLatin1String("owner = '") + sysUserName + QLatin1String("' ");
+        t.exec(query + whereList.join(QLatin1String(" or ")));
+
+        while (t.next()) {
+            if (t.value(0).toString().toUpper() != user.toUpper())
+                tl.append(t.value(0).toString() + QLatin1Char('.') + t.value(1).toString());
+            else
+                tl.append(t.value(1).toString());
+        }
+
+        // list all table synonyms as well
+        query = QLatin1String("select owner, synonym_name from all_synonyms where ");
+        t.exec(query + whereList.join(QLatin1String(" or ")));
+        while (t.next()) {
+            if (t.value(0).toString() != d->user)
+                tl.append(t.value(0).toString() + QLatin1String(".") + t.value(1).toString());
+            else
+                tl.append(t.value(1).toString());
+        }
     }
     return tl;
 }
diff --git a/src/sql/models/qsqlrelationaltablemodel.cpp b/src/sql/models/qsqlrelationaltablemodel.cpp
index 5f0a35d..aec54d6 100644
--- a/src/sql/models/qsqlrelationaltablemodel.cpp
+++ b/src/sql/models/qsqlrelationaltablemodel.cpp
@@ -563,7 +563,7 @@ QString QSqlRelationalTableModel::selectStatement() const
 
             // If there are duplicate field names they must be aliased
             if (fieldNames.value(fieldList[i]) > 1) {
-                QString relTableName = relation.tableName();
+                QString relTableName = relation.tableName().section(QChar::fromLatin1('.'), -1, -1);
                 if (d->db.driver()->isIdentifierEscaped(relTableName, QSqlDriver::TableName))
                     relTableName = d->db.driver()->stripDelimiters(relTableName, QSqlDriver::TableName);
                 QString displayColumn = relation.displayColumn();