Merge oslo-staging-2/4.6 into upstream/4.6

59 files changed, 1892 insertions, 821 deletions

diff --git a/dist/changes-4.6.1 b/dist/changes-4.6.1
index 6896358..5efa0e2 100644
--- a/dist/changes-4.6.1
+++ b/dist/changes-4.6.1
@@ -46,8 +46,11 @@ QtCore
 QtGui
 -----
 
- - foo
-    * bar
+ - QPixmap
+    * load() and loadFromData() can now support compressed GL textures
+      in the DDS, ETC1, PVRTC2, and PVRTC4 formats if the OpenGL graphics
+      system is active and the appropriate extensions are present in the
+      GL implementation.
 
 QtDBus
 ------
@@ -64,8 +67,10 @@ QtNetwork
 QtOpenGL
 --------
 
- - foo
-    * bar
+ - QGLContext
+    * bindTexture(QString) now supports DDS, ETC1, PVRTC2, and PVRTC4
+      compressed textures if the appropriate extensions are present
+      in the GL implementation.
 
 QtScript
 --------
diff --git a/examples/graphicsview/anchorlayout/main.cpp b/examples/graphicsview/anchorlayout/main.cpp
index f898d1d..389bc9e 100644
--- a/examples/graphicsview/anchorlayout/main.cpp
+++ b/examples/graphicsview/anchorlayout/main.cpp
@@ -122,8 +122,8 @@ int main(int argc, char **argv)
 
     scene.addItem(w);
     scene.setBackgroundBrush(Qt::darkGreen);
-    QGraphicsView *view = new QGraphicsView(&scene);
-    view->show();
+    QGraphicsView view(&scene);
+    view.show();
 
     return app.exec();
 }
diff --git a/mkspecs/linux-g++-gles2-experimental/qmake.conf b/mkspecs/linux-g++-gles2-experimental/qmake.conf
deleted file mode 100644
index 9c28d17..0000000
--- a/mkspecs/linux-g++-gles2-experimental/qmake.conf
+++ /dev/null
@@ -1,22 +0,0 @@
-#
-# Experimental qmake configuration for GLES2
-#
-
-MAKEFILE_GENERATOR	= UNIX
-TEMPLATE		= app
-CONFIG			+= qt warn_on release incremental link_prl
-QT			+= core gui
-QMAKE_INCREMENTAL_STYLE = sublib
-
-include(../common/g++.conf)
-
-QMAKE_LFLAGS += -Wl,-rpath-link=/usr/lib
-
-include(../common/linux.conf)
-
-QMAKE_LIBS_EGL        = -lEGL
-QMAKE_LIBS_OPENGL     = -lGLESv2
-QMAKE_LIBS_OPENGL_QT  = -lGLESv2 -lEGL
-
-
-load(qt_config)
diff --git a/mkspecs/linux-g++-gles2-experimental/qplatformdefs.h b/mkspecs/linux-g++-gles2-experimental/qplatformdefs.h
deleted file mode 100644
index ecfbc73..0000000
--- a/mkspecs/linux-g++-gles2-experimental/qplatformdefs.h
+++ /dev/null
@@ -1,166 +0,0 @@
-/****************************************************************************
-**
-** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
-** All rights reserved.
-** Contact: Nokia Corporation (qt-info@nokia.com)
-**
-** This file is part of the qmake spec of the Qt Toolkit.
-**
-** $QT_BEGIN_LICENSE:LGPL$
-** No Commercial Usage
-** This file contains pre-release code and may not be distributed.
-** You may use this file in accordance with the terms and conditions
-** contained in the Technology Preview License Agreement accompanying
-** this package.
-**
-** GNU Lesser General Public License Usage
-** Alternatively, this file may be used under the terms of the GNU Lesser
-** General Public License version 2.1 as published by the Free Software
-** Foundation and appearing in the file LICENSE.LGPL included in the
-** packaging of this file.  Please review the following information to
-** ensure the GNU Lesser General Public License version 2.1 requirements
-** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
-**
-** In addition, as a special exception, Nokia gives you certain additional
-** rights.  These rights are described in the Nokia Qt LGPL Exception
-** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
-**
-** If you have questions regarding the use of this file, please contact
-** Nokia at qt-info@nokia.com.
-**
-**
-**
-**
-**
-**
-**
-**
-** $QT_END_LICENSE$
-**
-****************************************************************************/
-
-#ifndef QPLATFORMDEFS_H
-#define QPLATFORMDEFS_H
-
-// Get Qt defines/settings
-
-#include "qglobal.h"
-
-// Set any POSIX/XOPEN defines at the top of this file to turn on specific APIs
-
-// 1) need to reset default environment if _BSD_SOURCE is defined
-// 2) need to specify POSIX thread interfaces explicitly in glibc 2.0
-// 3) it seems older glibc need this to include the X/Open stuff
-#ifndef _GNU_SOURCE
-#  define _GNU_SOURCE
-#endif
-
-#include <unistd.h>
-
-
-// We are hot - unistd.h should have turned on the specific APIs we requested
-
-#include <features.h>
-#include <pthread.h>
-#include <dirent.h>
-#include <fcntl.h>
-#include <grp.h>
-#include <pwd.h>
-#include <signal.h>
-#include <dlfcn.h>
-
-#include <sys/types.h>
-#include <sys/ioctl.h>
-#include <sys/ipc.h>
-#include <sys/time.h>
-#include <sys/shm.h>
-#include <sys/socket.h>
-#include <sys/stat.h>
-#include <sys/wait.h>
-#include <netinet/in.h>
-#ifndef QT_NO_IPV6IFNAME
-#include <net/if.h>
-#endif
-
-#ifdef QT_LARGEFILE_SUPPORT
-#define QT_STATBUF              struct stat64
-#define QT_STATBUF4TSTAT        struct stat64
-#define QT_STAT                 ::stat64
-#define QT_FSTAT                ::fstat64
-#define QT_LSTAT                ::lstat64
-#define QT_OPEN                 ::open64
-#define QT_TRUNCATE             ::truncate64
-#define QT_FTRUNCATE            ::ftruncate64
-#define QT_LSEEK                ::lseek64
-#else
-#define QT_STATBUF              struct stat
-#define QT_STATBUF4TSTAT        struct stat
-#define QT_STAT                 ::stat
-#define QT_FSTAT                ::fstat
-#define QT_LSTAT                ::lstat
-#define QT_OPEN                 ::open
-#define QT_TRUNCATE             ::truncate
-#define QT_FTRUNCATE            ::ftruncate
-#define QT_LSEEK                ::lseek
-#endif
-
-#ifdef QT_LARGEFILE_SUPPORT
-#define QT_FOPEN                ::fopen64
-#define QT_FSEEK                ::fseeko64
-#define QT_FTELL                ::ftello64
-#define QT_FGETPOS              ::fgetpos64
-#define QT_FSETPOS              ::fsetpos64
-#define QT_MMAP                 ::mmap64
-#define QT_FPOS_T               fpos64_t
-#define QT_OFF_T                off64_t
-#else
-#define QT_FOPEN                ::fopen
-#define QT_FSEEK                ::fseek
-#define QT_FTELL                ::ftell
-#define QT_FGETPOS              ::fgetpos
-#define QT_FSETPOS              ::fsetpos
-#define QT_MMAP                 ::mmap
-#define QT_FPOS_T               fpos_t
-#define QT_OFF_T                long
-#endif
-
-#define QT_STAT_REG		S_IFREG
-#define QT_STAT_DIR		S_IFDIR
-#define QT_STAT_MASK		S_IFMT
-#define QT_STAT_LNK		S_IFLNK
-#define QT_SOCKET_CONNECT	::connect
-#define QT_SOCKET_BIND		::bind
-#define QT_FILENO		fileno
-#define QT_CLOSE		::close
-#define QT_READ			::read
-#define QT_WRITE		::write
-#define QT_ACCESS		::access
-#define QT_GETCWD		::getcwd
-#define QT_CHDIR		::chdir
-#define QT_MKDIR		::mkdir
-#define QT_RMDIR		::rmdir
-#define QT_OPEN_LARGEFILE       O_LARGEFILE
-#define QT_OPEN_RDONLY		O_RDONLY
-#define QT_OPEN_WRONLY		O_WRONLY
-#define QT_OPEN_RDWR		O_RDWR
-#define QT_OPEN_CREAT		O_CREAT
-#define QT_OPEN_TRUNC		O_TRUNC
-#define QT_OPEN_APPEND		O_APPEND
-
-#define QT_SIGNAL_RETTYPE	void
-#define QT_SIGNAL_ARGS		int
-#define QT_SIGNAL_IGNORE	SIG_IGN
-
-#if defined(__GLIBC__) && (__GLIBC__ >= 2)
-#define QT_SOCKLEN_T		socklen_t
-#else
-#define QT_SOCKLEN_T		int
-#endif
-
-#if defined(_XOPEN_SOURCE) && (_XOPEN_SOURCE >= 500)
-#define QT_SNPRINTF		::snprintf
-#define QT_VSNPRINTF		::vsnprintf
-#endif
-
-
-#endif // QPLATFORMDEFS_H
diff --git a/mkspecs/unsupported/linux-host-g++/qmake.conf b/mkspecs/unsupported/linux-host-g++/qmake.conf
new file mode 100644
index 0000000..237477c
--- /dev/null
+++ b/mkspecs/unsupported/linux-host-g++/qmake.conf
@@ -0,0 +1,138 @@
+#
+# QMake configuration for Scratchbox's host-gcc compiler.
+#
+# This mkspec can be used as the platform mkspec when building
+# Qt in scratchbox. If used as such, qmake and similar host
+# tools will be compiled for the host architecture (E.g. x86)
+# and thus not run in the emulator. This results in a 
+# significant improvement in build times.
+# 
+# Note: The mkspec copied & pasted parts from common/gcc.conf
+#       and common/linux.conf as setBootstrapVariable in
+#       configure has a bug which stops re-assignments working
+#       for QMake variables (I.e. "QMAKE_foo = bar" is broken).
+
+MAKEFILE_GENERATOR	= UNIX
+TEMPLATE		= app
+CONFIG			+= qt warn_on release incremental link_prl
+QT			+= core gui
+QMAKE_INCREMENTAL_STYLE = sublib
+
+#
+# qmake configuration for common gcc
+#
+
+QMAKE_CC                = host-gcc
+QMAKE_CFLAGS            += -pipe
+QMAKE_CFLAGS_DEPS       += -M
+QMAKE_CFLAGS_WARN_ON    += -Wall -W
+QMAKE_CFLAGS_WARN_OFF   += -w
+QMAKE_CFLAGS_RELEASE    += -O2
+QMAKE_CFLAGS_DEBUG      += -g
+QMAKE_CFLAGS_SHLIB      += -fPIC
+QMAKE_CFLAGS_STATIC_LIB += -fPIC
+QMAKE_CFLAGS_YACC       += -Wno-unused -Wno-parentheses
+QMAKE_CFLAGS_HIDESYMS   += -fvisibility=hidden
+QMAKE_CFLAGS_PRECOMPILE += -x c-header -c ${QMAKE_PCH_INPUT} -o ${QMAKE_PCH_OUTPUT}
+QMAKE_CFLAGS_USE_PRECOMPILE += -include ${QMAKE_PCH_OUTPUT_BASE}
+
+QMAKE_CXX               = host-g++
+QMAKE_CXXFLAGS          += $$QMAKE_CFLAGS
+QMAKE_CXXFLAGS_DEPS     += $$QMAKE_CFLAGS_DEPS
+QMAKE_CXXFLAGS_WARN_ON  += $$QMAKE_CFLAGS_WARN_ON
+QMAKE_CXXFLAGS_WARN_OFF += $$QMAKE_CFLAGS_WARN_OFF
+QMAKE_CXXFLAGS_RELEASE  += $$QMAKE_CFLAGS_RELEASE
+QMAKE_CXXFLAGS_DEBUG    += $$QMAKE_CFLAGS_DEBUG
+QMAKE_CXXFLAGS_SHLIB    += $$QMAKE_CFLAGS_SHLIB
+QMAKE_CXXFLAGS_STATIC_LIB += $$QMAKE_CFLAGS_STATIC_LIB
+QMAKE_CXXFLAGS_YACC     += $$QMAKE_CFLAGS_YACC
+QMAKE_CXXFLAGS_HIDESYMS += $$QMAKE_CFLAGS_HIDESYMS -fvisibility-inlines-hidden
+QMAKE_CXXFLAGS_PRECOMPILE += -x c++-header -c ${QMAKE_PCH_INPUT} -o ${QMAKE_PCH_OUTPUT}
+QMAKE_CXXFLAGS_USE_PRECOMPILE = $$QMAKE_CFLAGS_USE_PRECOMPILE
+
+QMAKE_LINK              = host-g++
+QMAKE_LINK_SHLIB        = host-g++
+QMAKE_LINK_C            = host-gcc
+QMAKE_LINK_C_SHLIB      = host-gcc
+QMAKE_LFLAGS            +=
+QMAKE_LFLAGS_RELEASE    += -Wl,-O1
+QMAKE_LFLAGS_DEBUG      +=
+QMAKE_LFLAGS_APP        +=
+QMAKE_LFLAGS_SHLIB      += -shared
+QMAKE_LFLAGS_PLUGIN     += $$QMAKE_LFLAGS_SHLIB
+QMAKE_LFLAGS_SONAME     += -Wl,-soname,
+QMAKE_LFLAGS_THREAD     +=
+QMAKE_LFLAGS_NOUNDEF    += -Wl,--no-undefined
+QMAKE_RPATH             = -Wl,-rpath,
+
+QMAKE_PCH_OUTPUT_EXT    = .gch
+
+# -Bsymbolic-functions (ld) support
+QMAKE_LFLAGS_BSYMBOLIC_FUNC = -Wl,-Bsymbolic-functions
+QMAKE_LFLAGS_DYNAMIC_LIST = -Wl,--dynamic-list,
+
+#
+# qmake configuration for common linux
+#
+
+QMAKE_CFLAGS_THREAD	+= -D_REENTRANT
+QMAKE_CXXFLAGS_THREAD	+= $$QMAKE_CFLAGS_THREAD
+
+QMAKE_INCDIR          =
+QMAKE_LIBDIR          =
+QMAKE_INCDIR_X11      = /usr/X11R6/include
+QMAKE_LIBDIR_X11      = /usr/X11R6/lib
+QMAKE_INCDIR_QT       = $$[QT_INSTALL_HEADERS]
+QMAKE_LIBDIR_QT       = $$[QT_INSTALL_LIBS]
+QMAKE_INCDIR_OPENGL   = /usr/X11R6/include
+QMAKE_LIBDIR_OPENGL   = /usr/X11R6/lib
+QMAKE_INCDIR_OPENGL_ES1 = $$QMAKE_INCDIR_OPENGL
+QMAKE_LIBDIR_OPENGL_ES1 = $$QMAKE_LIBDIR_OPENGL
+QMAKE_INCDIR_OPENGL_ES1CL = $$QMAKE_INCDIR_OPENGL
+QMAKE_LIBDIR_OPENGL_ES1CL = $$QMAKE_LIBDIR_OPENGL
+QMAKE_INCDIR_OPENGL_ES2 = $$QMAKE_INCDIR_OPENGL
+QMAKE_LIBDIR_OPENGL_ES2 = $$QMAKE_LIBDIR_OPENGL
+QMAKE_INCDIR_EGL      = 
+QMAKE_LIBDIR_EGL      =
+QMAKE_INCDIR_OPENVG   = 
+QMAKE_LIBDIR_OPENVG   =
+
+QMAKE_LIBS            =
+QMAKE_LIBS_DYNLOAD    = -ldl
+QMAKE_LIBS_X11        = -lXext -lX11 -lm
+QMAKE_LIBS_X11SM      = -lSM -lICE
+QMAKE_LIBS_NIS        = -lnsl
+QMAKE_LIBS_EGL        = -lEGL
+QMAKE_LIBS_OPENGL     = -lGLU -lGL
+QMAKE_LIBS_OPENGL_QT  = -lGL
+QMAKE_LIBS_OPENGL_ES1 = -lGLES_CM
+QMAKE_LIBS_OPENGL_ES1CL = -lGLES_CL
+QMAKE_LIBS_OPENGL_ES2 = -lGLESv2
+QMAKE_LIBS_OPENVG     = -lOpenVG
+QMAKE_LIBS_THREAD     = -lpthread
+
+QMAKE_MOC             = $$[QT_INSTALL_BINS]/moc
+QMAKE_UIC             = $$[QT_INSTALL_BINS]/uic
+
+QMAKE_AR              = host-ar cqs
+QMAKE_OBJCOPY         = host-objcopy
+QMAKE_RANLIB          =
+
+QMAKE_TAR             = tar -cf
+QMAKE_GZIP            = gzip -9f
+
+QMAKE_COPY            = cp -f
+QMAKE_COPY_FILE       = $(COPY)
+QMAKE_COPY_DIR        = $(COPY) -r
+QMAKE_MOVE            = mv -f
+QMAKE_DEL_FILE        = rm -f
+QMAKE_DEL_DIR         = rmdir
+QMAKE_STRIP           = host-strip
+QMAKE_STRIPFLAGS_LIB += --strip-unneeded
+QMAKE_CHK_DIR_EXISTS  = test -d
+QMAKE_MKDIR           = mkdir -p
+QMAKE_INSTALL_FILE    = install -m 644 -p
+QMAKE_INSTALL_PROGRAM = install -m 755 -p
+
+include(../common/unix.conf)
+load(qt_config)
diff --git a/mkspecs/unsupported/linux-host-g++/qplatformdefs.h b/mkspecs/unsupported/linux-host-g++/qplatformdefs.h
new file mode 100644
index 0000000..60e0f5e
--- /dev/null
+++ b/mkspecs/unsupported/linux-host-g++/qplatformdefs.h
@@ -0,0 +1,42 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the qmake spec of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights.  These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "../../linux-g++/qplatformdefs.h"
diff --git a/qmake/generators/symbian/symmake.cpp b/qmake/generators/symbian/symmake.cpp
index afaf338..8379ed9 100644
--- a/qmake/generators/symbian/symmake.cpp
+++ b/qmake/generators/symbian/symmake.cpp
@@ -77,6 +77,15 @@
 #define MMP_LINKEROPTION_CW "LINKEROPTION CW"
 #define MMP_LINKEROPTION_ARMCC "LINKEROPTION ARMCC"
 #define MMP_LINKEROPTION_GCCE "LINKEROPTION GCCE"
+#define MMP_CAPABILITY "CAPABILITY"
+#define MMP_EPOCALLOWDLLDATA "EPOCALLOWDLLDATA"
+#define MMP_EPOCHEAPSIZE "EPOCHEAPSIZE"
+#define MMP_EPOCSTACKSIZE "EPOCSTACKSIZE"
+#define MMP_UID "UID"
+#define MMP_VENDORID "VENDORID"
+#define MMP_VERSION "VERSION"
+#define MMP_START_RESOURCE "START RESOURCE"
+#define MMP_END_RESOURCE "END"
 
 #define SIS_TARGET "sis"
 #define OK_SIS_TARGET "ok_sis"
@@ -155,7 +164,7 @@ void SymbianMakefileGenerator::writeHeader(QTextStream &t)
 {
     t << "// ============================================================================" << endl;
     t << "// * Makefile for building: " << escapeFilePath(var("TARGET")) << endl;
-    t << "// * Generated by qmake (" << qmake_version() << ") (Qt " << QT_VERSION_STR << ") on: ";
+    t << "// * Generated by qmake (" << qmake_version() << ") (Qt " QT_VERSION_STR ") on: ";
     t << QDateTime::currentDateTime().toString(Qt::ISODate) << endl;
     t << "// * This file is generated by qmake and should not be modified by the" << endl;
     t << "// * user." << endl;
@@ -444,7 +453,7 @@ void SymbianMakefileGenerator::writeCustomDefFile()
             QTextStream t(&ft);
 
             t << "; ==============================================================================" << endl;
-            t << "; Generated by qmake (" << qmake_version() << ") (Qt " << QT_VERSION_STR << ") on: ";
+            t << "; Generated by qmake (" << qmake_version() << ") (Qt " QT_VERSION_STR ") on: ";
             t << QDateTime::currentDateTime().toString(Qt::ISODate) << endl;
             t << "; This file is generated by qmake and should not be modified by the" << endl;
             t << "; user." << endl;
@@ -646,30 +655,76 @@ void SymbianMakefileGenerator::initMmpVariables()
 
     // Check MMP_RULES for singleton keywords that are overridden
     QStringList overridableMmpKeywords;
+    QStringList restrictableMmpKeywords;
+    QStringList restrictedMmpKeywords;
+    bool inResourceBlock = false;
+
     overridableMmpKeywords << QLatin1String(MMP_TARGETTYPE);
+    restrictableMmpKeywords << QLatin1String(MMP_TARGET) << QLatin1String(MMP_SECUREID)
+       << QLatin1String(MMP_OPTION_CW) << QLatin1String(MMP_OPTION_ARMCC)
+       << QLatin1String(MMP_OPTION_GCCE) << QLatin1String(MMP_LINKEROPTION_CW)
+       << QLatin1String(MMP_LINKEROPTION_ARMCC) << QLatin1String(MMP_LINKEROPTION_GCCE)
+       << QLatin1String(MMP_CAPABILITY) << QLatin1String(MMP_EPOCALLOWDLLDATA)
+       << QLatin1String(MMP_EPOCHEAPSIZE) << QLatin1String(MMP_EPOCSTACKSIZE)
+       << QLatin1String(MMP_UID) << QLatin1String(MMP_VENDORID)
+       << QLatin1String(MMP_VERSION);
 
     foreach (QString item, project->values("MMP_RULES")) {
         if (project->values(item).isEmpty()) {
-            checkOverridability(overridableMmpKeywords, item);
+            handleMmpRulesOverrides(item, inResourceBlock, restrictedMmpKeywords,
+                                    restrictableMmpKeywords, overridableMmpKeywords);
         } else {
             foreach (QString itemRow, project->values(item)) {
-                checkOverridability(overridableMmpKeywords, itemRow);
+                handleMmpRulesOverrides(itemRow, inResourceBlock, restrictedMmpKeywords,
+                                        restrictableMmpKeywords, overridableMmpKeywords);
             }
         }
     }
+
+    if (restrictedMmpKeywords.size()) {
+        fprintf(stderr, "Warning: Restricted statements detected in MMP_RULES:\n"
+                "         (%s)\n"
+                "         Use corresponding qmake variable(s) instead.\n",
+                qPrintable(restrictedMmpKeywords.join(", ")));
+        }
 }
 
-void SymbianMakefileGenerator::checkOverridability(QStringList &overridableKeywords, QString &checkString)
+void SymbianMakefileGenerator::handleMmpRulesOverrides(QString &checkString,
+                                                       bool &inResourceBlock,
+                                                       QStringList &restrictedMmpKeywords,
+                                                       const QStringList &restrictableMmpKeywords,
+                                                       const QStringList &overridableMmpKeywords)
 {
-    // Check if checkString contains overridable keyword and
-    // add the keyword to overridden keywords list if so.
     QString simplifiedString = checkString.simplified();
-    foreach (QString item, overridableKeywords) {
-        if (simplifiedString.startsWith(item))
-            appendIfnotExist(overriddenMmpKeywords, item);
+
+    if (!inResourceBlock && simplifiedString.startsWith(MMP_START_RESOURCE, Qt::CaseInsensitive))
+        inResourceBlock = true;
+    else if (inResourceBlock && simplifiedString.startsWith(MMP_END_RESOURCE, Qt::CaseInsensitive))
+        inResourceBlock = false;
+
+    // Allow restricted and overridable items in RESOURCE blocks as those do not actually
+    // override anything.
+    if (!inResourceBlock) {
+        appendKeywordIfMatchFound(overriddenMmpKeywords, overridableMmpKeywords, simplifiedString);
+        appendKeywordIfMatchFound(restrictedMmpKeywords, restrictableMmpKeywords, simplifiedString);
+    }
+}
+
+void SymbianMakefileGenerator::appendKeywordIfMatchFound(QStringList &list,
+                                                         const QStringList &keywordList,
+                                                         QString &checkString)
+{
+    // Check if checkString starts with any supplied keyword and
+    // add the found keyword to list if it does.
+    foreach (QString item, keywordList) {
+        if (checkString.startsWith(QString(item).append(" "), Qt::CaseInsensitive)
+            || checkString.compare(item, Qt::CaseInsensitive) == 0) {
+            appendIfnotExist(list, item);
+        }
     }
 }
 
+
 bool SymbianMakefileGenerator::removeDuplicatedStrings(QStringList &stringList)
 {
     QStringList tmpStringList;
@@ -690,7 +745,7 @@ bool SymbianMakefileGenerator::removeDuplicatedStrings(QStringList &stringList)
 void SymbianMakefileGenerator::writeMmpFileHeader(QTextStream &t)
 {
     t << "// ==============================================================================" << endl;
-    t << "// Generated by qmake (" << qmake_version() << ") (Qt " << QT_VERSION_STR << ") on: ";
+    t << "// Generated by qmake (" << qmake_version() << ") (Qt " QT_VERSION_STR ") on: ";
     t << QDateTime::currentDateTime().toString(Qt::ISODate) << endl;
     t << "// This file is generated by qmake and should not be modified by the" << endl;
     t << "// user." << endl;
@@ -775,7 +830,7 @@ void SymbianMakefileGenerator::writeMmpFileMacrosPart(QTextStream& t)
 
 void SymbianMakefileGenerator::addMacro(QTextStream& t, const QString& value)
 {
-    t << "MACRO" << "\t\t" <<  value << endl;
+    t << "MACRO\t\t" <<  value << endl;
 }
 
 
@@ -784,28 +839,28 @@ void SymbianMakefileGenerator::writeMmpFileTargetPart(QTextStream& t)
     bool skipTargetType = overriddenMmpKeywords.contains(MMP_TARGETTYPE);
 
     if (targetType == TypeExe) {
-        t << MMP_TARGET << "\t\t" << fixedTarget << ".exe" << endl;
+        t << MMP_TARGET "\t\t" << fixedTarget << ".exe" << endl;
         if (!skipTargetType) {
             if (project->values("CONFIG").contains("stdbinary", Qt::CaseInsensitive))
-                t << MMP_TARGETTYPE << "\t\t" << "STDEXE" << endl;
+                t << MMP_TARGETTYPE "\t\tSTDEXE" << endl;
             else
-                t << MMP_TARGETTYPE << "\t\t" << "EXE" << endl;
+                t << MMP_TARGETTYPE "\t\tEXE" << endl;
         }
     } else if (targetType == TypeDll || targetType == TypePlugin) {
-        t << MMP_TARGET << "\t\t" << fixedTarget << ".dll" << endl;
+        t << MMP_TARGET "\t\t" << fixedTarget << ".dll" << endl;
         if (!skipTargetType) {
             if (project->values("CONFIG").contains("stdbinary", Qt::CaseInsensitive))
-                t << MMP_TARGETTYPE << "\t\t" << "STDDLL" << endl;
+                t << MMP_TARGETTYPE "\t\tSTDDLL" << endl;
             else
-                t << MMP_TARGETTYPE << "\t\t" << "DLL" << endl;
+                t << MMP_TARGETTYPE "\t\tDLL" << endl;
         }
     } else if (targetType == TypeLib) {
-        t << MMP_TARGET << "\t\t" << fixedTarget << ".lib" << endl;
+        t << MMP_TARGET "\t\t" << fixedTarget << ".lib" << endl;
         if (!skipTargetType) {
             if (project->values("CONFIG").contains("stdbinary", Qt::CaseInsensitive))
-                t << MMP_TARGETTYPE << "\t\t" << "STDLIB" << endl;
+                t << MMP_TARGETTYPE "\t\tSTDLIB" << endl;
             else
-                t << MMP_TARGETTYPE << "\t\t" << "LIB" << endl;
+                t << MMP_TARGETTYPE "\t\tLIB" << endl;
         }
     } else {
         fprintf(stderr, "Error: Unexpected targettype (%d) in SymbianMakefileGenerator::writeMmpFileTargetPart\n", targetType);
@@ -813,30 +868,30 @@ void SymbianMakefileGenerator::writeMmpFileTargetPart(QTextStream& t)
 
     t << endl;
 
-    t << "UID" << "\t\t" << uid2 << " " << uid3 << endl;
+    t << MMP_UID "\t\t" << uid2 << " " << uid3 << endl;
 
     if (0 != project->values("TARGET.SID").size()) {
-        t << MMP_SECUREID << "\t\t" << project->values("TARGET.SID").join(" ") << endl;
+        t << MMP_SECUREID "\t\t" << project->values("TARGET.SID").join(" ") << endl;
     } else {
         if (0 == uid3.size())
-            t << MMP_SECUREID << "\t\t" << "0" << endl;
+            t << MMP_SECUREID "\t\t0" << endl;
         else
-            t << MMP_SECUREID << "\t\t" << uid3 << endl;
+            t << MMP_SECUREID "\t\t" << uid3 << endl;
     }
 
     // default value used from mkspecs is 0
     if (0 != project->values("TARGET.VID").size()) {
-        t << "VENDORID" << "\t\t" << project->values("TARGET.VID").join(" ") << endl;
+        t << MMP_VENDORID "\t\t" << project->values("TARGET.VID").join(" ") << endl;
     }
 
     t << endl;
 
     if (0 != project->first("TARGET.EPOCSTACKSIZE").size())
-        t << "EPOCSTACKSIZE" << "\t\t" << project->first("TARGET.EPOCSTACKSIZE") << endl;
+        t << MMP_EPOCSTACKSIZE "\t\t" << project->first("TARGET.EPOCSTACKSIZE") << endl;
     if (0 != project->values("TARGET.EPOCHEAPSIZE").size())
-        t << "EPOCHEAPSIZE" << "\t\t" << project->values("TARGET.EPOCHEAPSIZE").join(" ") << endl;
+        t << MMP_EPOCHEAPSIZE "\t\t" << project->values("TARGET.EPOCHEAPSIZE").join(" ") << endl;
     if (0 != project->values("TARGET.EPOCALLOWDLLDATA").size())
-        t << "EPOCALLOWDLLDATA" << endl;
+        t << MMP_EPOCALLOWDLLDATA << endl;
 
     if (targetType == TypePlugin && !project->values("CONFIG").contains("stdbinary", Qt::CaseInsensitive)) {
         // Use custom def file for Qt plugins
@@ -865,20 +920,20 @@ void SymbianMakefileGenerator::writeMmpFileResourcePart(QTextStream& t, QStringL
             t << lang << " "; // no endl
         }
         t << endl;
-        t << "START RESOURCE\t\t" << locTarget << endl;
+        t << MMP_START_RESOURCE "\t\t" << locTarget << endl;
         t << "HEADER" << endl;
         t << "TARGETPATH\t\t\t" RESOURCE_DIRECTORY_MMP << endl;
-        t << "END" << endl << endl;
+        t << MMP_END_RESOURCE << endl << endl;
 
         QString regTarget = fixedTarget;
         regTarget.append("_reg.rss");
 
         t << "SOURCEPATH\t\t\t." << endl;
-        t << "START RESOURCE\t\t" << regTarget << endl;
+        t << MMP_START_RESOURCE "\t\t" << regTarget << endl;
         if (isForSymbianSbsv2())
             t << "DEPENDS " << fixedTarget << ".rsg" << endl;
         t << "TARGETPATH\t\t" REGISTRATION_RESOURCE_DIRECTORY_HW << endl;
-        t << "END" << endl << endl;
+        t << MMP_END_RESOURCE << endl << endl;
     }
 }
 
@@ -890,7 +945,7 @@ void SymbianMakefileGenerator::writeMmpFileSystemIncludePart(QTextStream& t)
         QStringList values = it.value();
         for (int i = 0; i < values.size(); ++i) {
             QString handledPath = values.at(i);
-            t << "SYSTEMINCLUDE" << "\t\t" << fixPathForMmp(handledPath, current) << endl;
+            t << "SYSTEMINCLUDE\t\t" << fixPathForMmp(handledPath, current) << endl;
         }
     }
 
@@ -946,14 +1001,14 @@ void SymbianMakefileGenerator::writeMmpFileCapabilityPart(QTextStream& t)
 {
     if (0 != project->first("TARGET.CAPABILITY").size()) {
         QStringList &capabilities = project->values("TARGET.CAPABILITY");
-        t << "CAPABILITY" << "\t\t";
+        t << MMP_CAPABILITY "\t\t";
 
         for (int i = 0; i < capabilities.size(); ++i) {
             QString cap = capabilities.at(i);
             t << cap << " ";
         }
     } else {
-        t << "CAPABILITY" << "\t\t" << "None";
+        t << MMP_CAPABILITY "\t\tNone";
     }
     t << endl << endl;
 }
@@ -1048,21 +1103,21 @@ void SymbianMakefileGenerator::writeMmpFileCompilerOptionPart(QTextStream& t)
     if (!gccelink.isEmpty() && gccelink[gccelink.size()-1] == ' ')
         gccelink.chop(1);
 
-    if (!cw.isEmpty() && !overriddenMmpKeywords.contains(MMP_OPTION_CW))
+    if (!cw.isEmpty())
         t << MMP_OPTION_CW " " << cw <<  endl;
-    if (!armcc.isEmpty() && !overriddenMmpKeywords.contains(MMP_OPTION_ARMCC))
+    if (!armcc.isEmpty())
         t << MMP_OPTION_ARMCC " " << armcc <<  endl;
-    if (!gcce.isEmpty() && !overriddenMmpKeywords.contains(MMP_OPTION_GCCE))
+    if (!gcce.isEmpty())
         t << MMP_OPTION_GCCE " " << gcce <<  endl;
 
-    if (!cwlink.isEmpty() && !overriddenMmpKeywords.contains(MMP_LINKEROPTION_CW))
+    if (!cwlink.isEmpty())
         t << MMP_LINKEROPTION_CW " " << cwlink <<  endl;
-    if (!armlink.isEmpty() && !overriddenMmpKeywords.contains(MMP_LINKEROPTION_ARMCC))
+    if (!armlink.isEmpty())
         t << MMP_LINKEROPTION_ARMCC " " << armlink <<  endl;
-    if (!gccelink.isEmpty() && !overriddenMmpKeywords.contains(MMP_LINKEROPTION_GCCE))
+    if (!gccelink.isEmpty())
         t << MMP_LINKEROPTION_GCCE " " << gccelink <<  endl;
 
-    t <<  endl;
+    t << endl;
 }
 
 void SymbianMakefileGenerator::writeMmpFileBinaryVersionPart(QTextStream& t)
@@ -1098,7 +1153,7 @@ void SymbianMakefileGenerator::writeMmpFileBinaryVersionPart(QTextStream& t)
         mmpVersion = "10.0"; // Default binary version for symbian is 10.0
     }
 
-    t << "VERSION " << mmpVersion  << endl;
+    t << MMP_VERSION " " << mmpVersion  << endl;
 }
 
 void SymbianMakefileGenerator::writeMmpFileRulesPart(QTextStream& t)
@@ -1265,7 +1320,7 @@ void SymbianMakefileGenerator::writeRegRssFile(QStringList &userItems)
         generatedFiles << ft.fileName();
         QTextStream t(&ft);
         t << "// ============================================================================" << endl;
-        t << "// * Generated by qmake (" << qmake_version() << ") (Qt " << QT_VERSION_STR << ") on: ";
+        t << "// * Generated by qmake (" << qmake_version() << ") (Qt " QT_VERSION_STR ") on: ";
         t << QDateTime::currentDateTime().toString(Qt::ISODate) << endl;
         t << "// * This file is generated by qmake and should not be modified by the" << endl;
         t << "// * user." << endl;
@@ -1274,8 +1329,7 @@ void SymbianMakefileGenerator::writeRegRssFile(QStringList &userItems)
         t << "#include <" << fixedTarget << ".rsg>" << endl;
         t << "#include <appinfo.rh>" << endl;
         t << endl;
-        //t << "#include <data_caging_paths.hrh>" << "\n" << endl;
-        t << "UID2 " << "KUidAppRegistrationResourceFile" << endl;
+        t << "UID2 KUidAppRegistrationResourceFile" << endl;
         t << "UID3 " << uid3 << endl << endl;
         t << "RESOURCE APP_REGISTRATION_INFO" << endl;
         t << "\t{" << endl;
@@ -1300,7 +1354,7 @@ void SymbianMakefileGenerator::writeRssFile(QString &numberOfIcons, QString &ico
         generatedFiles << ft.fileName();
         QTextStream t(&ft);
         t << "// ============================================================================" << endl;
-        t << "// * Generated by qmake (" << qmake_version() << ") (Qt " << QT_VERSION_STR << ") on: ";
+        t << "// * Generated by qmake (" << qmake_version() << ") (Qt " QT_VERSION_STR ") on: ";
         t << QDateTime::currentDateTime().toString(Qt::ISODate) << endl;
         t << "// * This file is generated by qmake and should not be modified by the" << endl;
         t << "// * user." << endl;
@@ -1346,7 +1400,7 @@ void SymbianMakefileGenerator::writeLocFile(QStringList &symbianLangCodes)
         generatedFiles << ft.fileName();
         QTextStream t(&ft);
         t << "// ============================================================================" << endl;
-        t << "// * Generated by qmake (" << qmake_version() << ") (Qt " << QT_VERSION_STR << ") on: ";
+        t << "// * Generated by qmake (" << qmake_version() << ") (Qt " QT_VERSION_STR ") on: ";
         t << QDateTime::currentDateTime().toString(Qt::ISODate) << endl;
         t << "// * This file is generated by qmake and should not be modified by the" << endl;
         t << "// * user." << endl;
diff --git a/qmake/generators/symbian/symmake.h b/qmake/generators/symbian/symmake.h
index 2e78c46..1a20e64 100644
--- a/qmake/generators/symbian/symmake.h
+++ b/qmake/generators/symbian/symmake.h
@@ -96,7 +96,14 @@ protected:
     QString generateUID3();
 
     void initMmpVariables();
-    void checkOverridability(QStringList &overridableKeywords, QString &checkString);
+    void handleMmpRulesOverrides(QString &checkString,
+                                 bool &inResourceBlock,
+                                 QStringList &restrictedMmpKeywords,
+                                 const QStringList &restrictableMmpKeywords,
+                                 const QStringList &overridableMmpKeywords);
+    void appendKeywordIfMatchFound(QStringList &list,
+                                   const QStringList &keywordList,
+                                   QString &checkString);
 
     void writeHeader(QTextStream &t);
     void writeBldInfContent(QTextStream& t, bool addDeploymentExtension, const QString &iconFile);
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/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_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 bc47872..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
 
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/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/qsoftkeymanager.cpp b/src/gui/kernel/qsoftkeymanager.cpp
index 1acc9b3..0e98f39 100644
--- a/src/gui/kernel/qsoftkeymanager.cpp
+++ b/src/gui/kernel/qsoftkeymanager.cpp
@@ -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 06d52ae..e551a1d 100644
--- a/src/gui/kernel/qwidget.cpp
+++ b/src/gui/kernel/qwidget.cpp
@@ -5046,6 +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
@@ -5059,28 +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
 
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_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/qpainter.cpp b/src/gui/painting/qpainter.cpp
index 30f8c9e..66bf4f7 100644
--- a/src/gui/painting/qpainter.cpp
+++ b/src/gui/painting/qpainter.cpp
@@ -7630,7 +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/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/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/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/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/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 f6f6bb3..1bd1b91 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
@@ -1887,118 +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.");
+    QGLTexture texture(this);
+    QSize size = texture.bindCompressedTexture(fileName);
+    if (!size.isValid())
         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.");
-        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)
@@ -2322,6 +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);
@@ -2593,17 +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;
         }
     }
@@ -4907,10 +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"))
@@ -4928,6 +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"))
@@ -4951,12 +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"));
-    }
 }
 
 /*
@@ -5112,4 +5038,340 @@ 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.
+    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 ab72c9c..179d69a 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);
 
@@ -377,7 +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)
 
@@ -482,6 +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 {
@@ -518,7 +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/qpixmapdata_gl.cpp b/src/opengl/qpixmapdata_gl.cpp
index fb55097..0299cea 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 +409,61 @@ 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();
+        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);
+        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/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/tests/auto/qdesktopservices/tst_qdesktopservices.cpp b/tests/auto/qdesktopservices/tst_qdesktopservices.cpp
index 2d9e5dc..c105a97 100644
--- a/tests/auto/qdesktopservices/tst_qdesktopservices.cpp
+++ b/tests/auto/qdesktopservices/tst_qdesktopservices.cpp
@@ -70,6 +70,7 @@ private slots:
     void openMailtoUrl();
     void openFileUrl_data();
     void openFileUrl();
+    void openMultipleFileUrls();
 #endif
     void handlers();
     void storageLocation_data();
@@ -197,6 +198,7 @@ void tst_qdesktopservices::openMailtoUrl()
     QFETCH(QUrl, url);
     QFETCH(bool, result);
     QCOMPARE(QDesktopServices::openUrl(url), result);
+    QTest::qWait(5000);
 }
 
 void tst_qdesktopservices::openFileUrl_data()
@@ -239,7 +241,19 @@ void tst_qdesktopservices::openFileUrl()
     QFETCH(QUrl, url);
     QFETCH(bool, result);
     QCOMPARE(QDesktopServices::openUrl(url), result);
-    QTest::qWait(15000);
+    QTest::qWait(5000);
+}
+
+void tst_qdesktopservices::openMultipleFileUrls()
+{
+#ifndef RUN_MANUAL_TESTS
+    QSKIP("Test disabled -- only for manual purposes", SkipAll);
+#endif
+
+    QCOMPARE(QDesktopServices::openUrl(QUrl("file:///c:/data/images/image.bmp")), true);
+    QCOMPARE(QDesktopServices::openUrl(QUrl("file:///c:/data/images/image.png")), true);
+    QCOMPARE(QDesktopServices::openUrl(QUrl("file:///c:/data/others/noendofline.txt")), true); 
+    QCOMPARE(QDesktopServices::openUrl(QUrl("file:///c:/data/installs/ErrRd.sisx")), true);      
 }
 #endif
 
diff --git a/tests/auto/qgraphicsanchorlayout/tst_qgraphicsanchorlayout.cpp b/tests/auto/qgraphicsanchorlayout/tst_qgraphicsanchorlayout.cpp
index aa67ac5..6e78522 100644
--- a/tests/auto/qgraphicsanchorlayout/tst_qgraphicsanchorlayout.cpp
+++ b/tests/auto/qgraphicsanchorlayout/tst_qgraphicsanchorlayout.cpp
@@ -89,6 +89,7 @@ private slots:
     void snakeParallelWithLayout();
     void parallelToHalfLayout();
     void globalSpacing();
+    void graphicsAnchorHandling();
 };
 
 class RectWidget : public QGraphicsWidget
@@ -1196,7 +1197,7 @@ void tst_QGraphicsAnchorLayout::styleDefaults()
     QSizeF pref(20, 20);
     QSizeF max (50, 50);
 
-    /* 
+    /*
     create this layout, where a,b have controlType QSizePolicy::RadioButton
     c,d have controlType QSizePolicy::PushButton:
     +-------+
@@ -1243,9 +1244,9 @@ void tst_QGraphicsAnchorLayout::styleDefaults()
     scene.addItem(window);
 
     window->show();
-    QGraphicsView *view = new QGraphicsView(&scene);
-    view->resize(200, 200);
-    view->show();
+    QGraphicsView view(&scene);
+    view.resize(200, 200);
+    view.show();
 
     window->adjustSize();
     QCOMPARE(a->geometry(), QRectF(0,   3, 20, 20));    //radio
@@ -1264,10 +1265,13 @@ void tst_QGraphicsAnchorLayout::styleDefaults()
     window->setStyle(style);
     window->adjustSize();
     QCOMPARE(a->geometry(), QRectF(0,   3, 20, 20));
-    QCOMPARE(b->geometry(), QRectF(21, 25, 20, 20));     
+    QCOMPARE(b->geometry(), QRectF(21, 25, 20, 20));
     QCOMPARE(c->geometry(), QRectF(42, 47, 20, 20));
     QCOMPARE(d->geometry(), QRectF(63, 69, 20, 20));
     QCOMPARE(l->geometry(), QRectF(0,   0, 89, 98));
+
+    window->setStyle(0);
+    delete style;
 }
 
 
@@ -1776,7 +1780,8 @@ void tst_QGraphicsAnchorLayout::simplificationVsOrder()
     QGraphicsWidget *b = createItem(min, pref, max, "B");
     QGraphicsWidget *c = createItem(min, pref, max, "C");
 
-    QGraphicsAnchorLayout *l = new QGraphicsAnchorLayout;
+    QGraphicsWidget frame;
+    QGraphicsAnchorLayout *l = new QGraphicsAnchorLayout(&frame);
 
     // Bulk anchors
     l->addAnchor(l, Qt::AnchorLeft, a, Qt::AnchorLeft);
@@ -1801,7 +1806,6 @@ void tst_QGraphicsAnchorLayout::simplificationVsOrder()
 
     l->effectiveSizeHint(Qt::MinimumSize);
     if (hasSimplification) {
-        QEXPECT_FAIL("", "Sequential anchors cannot handle children of opposite directions", Continue);
         QCOMPARE(usedSimplex(l, Qt::Horizontal), false);
         QCOMPARE(usedSimplex(l, Qt::Vertical), false);
     }
@@ -1846,7 +1850,8 @@ void tst_QGraphicsAnchorLayout::simplificationVsRedundance()
     QGraphicsWidget *b = createItem(min, pref, max, "B");
     QGraphicsWidget *c = createItem(min, pref, max, "C");
 
-    QGraphicsAnchorLayout *l = new QGraphicsAnchorLayout;
+    QGraphicsWidget frame;
+    QGraphicsAnchorLayout *l = new QGraphicsAnchorLayout(&frame);
 
     l->addCornerAnchors(a, Qt::TopLeftCorner, l, Qt::TopLeftCorner);
     l->addCornerAnchors(a, Qt::BottomLeftCorner, l, Qt::BottomLeftCorner);
@@ -2016,6 +2021,42 @@ void tst_QGraphicsAnchorLayout::globalSpacing()
     QCOMPARE(newHSpacing, hSpacing);
 }
 
+void tst_QGraphicsAnchorLayout::graphicsAnchorHandling()
+{
+    QGraphicsAnchorLayout *l = new QGraphicsAnchorLayout();
+    QGraphicsWidget *a = createItem();
+
+    l->addAnchors(l, a);
+
+    QGraphicsAnchor *layoutAnchor = l->anchor(l, Qt::AnchorTop, l, Qt::AnchorBottom);
+    QGraphicsAnchor *itemAnchor = l->anchor(a, Qt::AnchorTop, a, Qt::AnchorBottom);
+    QGraphicsAnchor *invalidAnchor = l->anchor(a, Qt::AnchorTop, l, Qt::AnchorBottom);
+
+    // Ensure none of these anchors are accessible.
+    QVERIFY(layoutAnchor == 0);
+    QVERIFY(itemAnchor == 0);
+    QVERIFY(invalidAnchor == 0);
+
+    // Hook the anchors to a QObject
+    QObject object;
+    QGraphicsAnchor *userAnchor = l->anchor(l, Qt::AnchorTop, a, Qt::AnchorTop);
+    userAnchor->setParent(&object);
+    userAnchor = l->anchor(l, Qt::AnchorBottom, a, Qt::AnchorBottom);
+    userAnchor->setParent(&object);
+    userAnchor = l->anchor(l, Qt::AnchorRight, a, Qt::AnchorRight);
+    userAnchor->setParent(&object);
+    userAnchor = l->anchor(l, Qt::AnchorLeft, a, Qt::AnchorLeft);
+    userAnchor->setParent(&object);
+
+    QCOMPARE(object.children().size(), 4);
+
+    // Delete layout, this will cause all anchors to be deleted internally.
+    // We expect the public QGraphicsAnchor instances to be deleted too.
+    delete l;
+    QCOMPARE(object.children().size(), 0);
+
+    delete a;
+}
 
 QTEST_MAIN(tst_QGraphicsAnchorLayout)
 #include "tst_qgraphicsanchorlayout.moc"
diff --git a/tests/auto/qgraphicsanchorlayout1/tst_qgraphicsanchorlayout1.cpp b/tests/auto/qgraphicsanchorlayout1/tst_qgraphicsanchorlayout1.cpp
index baa1ba1..57dc90d 100644
--- a/tests/auto/qgraphicsanchorlayout1/tst_qgraphicsanchorlayout1.cpp
+++ b/tests/auto/qgraphicsanchorlayout1/tst_qgraphicsanchorlayout1.cpp
@@ -356,6 +356,8 @@ void tst_QGraphicsAnchorLayout1::testItemAt()
 
     QVERIFY( layout->itemAt(0) == widget2 );
 
+    delete widget1;
+
     widget->setLayout(layout);
     delete widget;
 }
@@ -460,6 +462,12 @@ void tst_QGraphicsAnchorLayout1::testAddAndRemoveAnchor()
 
     QCOMPARE( layout->count(), 0 );
 
+    delete widget1;
+    delete widget2;
+    delete widget3;
+    delete widget4;
+    delete widget5;
+
     widget->setLayout(layout);
     delete widget;
 }
@@ -1740,9 +1748,9 @@ void tst_QGraphicsAnchorLayout1::testBasicLayout()
         QRectF actual = truncate(widgets[item.index]->geometry());
 
         QCOMPARE(actual, expected);
-        delete widgets[item.index];
     }
 
+    qDeleteAll(widgets);
     delete widget;
 }
 
@@ -2231,8 +2239,9 @@ void tst_QGraphicsAnchorLayout1::testRemoveCenterAnchor()
         const BasicLayoutTestResult item = result[i];
 
         QCOMPARE(widgets[item.index]->geometry(), item.rect);
-        delete widgets[item.index];
     }
+
+    qDeleteAll(widgets);
     delete widget;
 }
 
@@ -2360,7 +2369,7 @@ void tst_QGraphicsAnchorLayout1::testSingleSizePolicy()
     QFETCH(bool, valid);
 
     // create objects
-    QGraphicsWidget *widget = new QGraphicsWidget;
+    QGraphicsWidget widget;
     TheAnchorLayout *layout = new TheAnchorLayout;
     TestWidget *childWidget = new TestWidget;
 
@@ -2370,11 +2379,11 @@ void tst_QGraphicsAnchorLayout1::testSingleSizePolicy()
     layout->setAnchor( layout, Qt::AnchorTop, childWidget, Qt::AnchorTop, 10 );
     layout->setAnchor( childWidget, Qt::AnchorBottom, layout, Qt::AnchorBottom, 10 );
 
-    widget->setLayout( layout );
+    widget.setLayout( layout );
 
     // set test case specific: policy and size
     childWidget->setSizePolicy( policy );
-    widget->setGeometry( QRectF( QPoint(0,0), size ) );
+    widget.setGeometry( QRectF( QPoint(0,0), size ) );
 
     QCOMPARE( layout->isValid() , valid );
 
@@ -2516,7 +2525,7 @@ void tst_QGraphicsAnchorLayout1::testDoubleSizePolicy()
     QFETCH(qreal, width2);
 
     // create objects
-    QGraphicsWidget *widget = new QGraphicsWidget;
+    QGraphicsWidget widget;
     TheAnchorLayout *layout = new TheAnchorLayout;
     TestWidget *childWidget1 = new TestWidget;
     TestWidget *childWidget2 = new TestWidget;
@@ -2526,13 +2535,13 @@ void tst_QGraphicsAnchorLayout1::testDoubleSizePolicy()
     layout->setAnchor( childWidget1, Qt::AnchorRight, childWidget2, Qt::AnchorLeft, 10 );
     layout->setAnchor( childWidget2, Qt::AnchorRight, layout, Qt::AnchorRight, 10 );
 
-    widget->setLayout( layout );
+    widget.setLayout( layout );
 
     // set test case specific: policy
     childWidget1->setSizePolicy( policy1 );
     childWidget2->setSizePolicy( policy2 );
 
-    widget->setGeometry( QRectF( QPoint(0,0), QSize( 100,100 ) ) );
+    widget.setGeometry( QRectF( QPoint(0,0), QSize( 100,100 ) ) );
 
     // check results:
     if ( width1 == -1.0f ) {
@@ -2649,7 +2658,7 @@ void tst_QGraphicsAnchorLayout1::testSizeDistribution()
     QFETCH(qreal, width2);
 
     // create objects
-    QGraphicsWidget *widget = new QGraphicsWidget;
+    QGraphicsWidget widget;
     TheAnchorLayout *layout = new TheAnchorLayout;
     TestWidget *childWidget1 = new TestWidget;
     TestWidget *childWidget2 = new TestWidget;
@@ -2659,7 +2668,7 @@ void tst_QGraphicsAnchorLayout1::testSizeDistribution()
     layout->setAnchor( childWidget1, Qt::AnchorRight, childWidget2, Qt::AnchorLeft, 10 );
     layout->setAnchor( childWidget2, Qt::AnchorRight, layout, Qt::AnchorRight, 10 );
 
-    widget->setLayout( layout );
+    widget.setLayout( layout );
 
     // set test case specific: size hints
     childWidget1->setMinimumWidth( sizeHints1.value( Qt::MinimumSize ) );
@@ -2670,7 +2679,7 @@ void tst_QGraphicsAnchorLayout1::testSizeDistribution()
     childWidget2->setPreferredWidth( sizeHints2.value( Qt::PreferredSize ) );
     childWidget2->setMaximumWidth( sizeHints2.value( Qt::MaximumSize ) );
 
-    widget->setGeometry( QRectF( QPoint(0,0), QSize( 100,100 ) ) );
+    widget.setGeometry( QRectF( QPoint(0,0), QSize( 100,100 ) ) );
 
     // check results:
     if ( width1 == -1.0f ) {
diff --git a/tests/auto/qgraphicseffect/tst_qgraphicseffect.cpp b/tests/auto/qgraphicseffect/tst_qgraphicseffect.cpp
index d216924..259df4d 100644
--- a/tests/auto/qgraphicseffect/tst_qgraphicseffect.cpp
+++ b/tests/auto/qgraphicseffect/tst_qgraphicseffect.cpp
@@ -196,8 +196,8 @@ void tst_QGraphicsEffect::source()
     // Uninstall effect on QGraphicsItem.
     effect->reset();
     item->setGraphicsEffect(0);
-    QVERIFY(!effect->source());
-    QVERIFY(effect->m_sourceChangedFlags & QGraphicsEffect::SourceDetached);
+    QVERIFY(!effect);
+    effect = new CustomEffect;
 
     // The item takes ownership and should delete the effect when destroyed.
     item->setGraphicsEffect(effect);
@@ -249,10 +249,10 @@ void tst_QGraphicsEffect::boundingRect()
     QCOMPARE(effect->boundingRect(), effect->boundingRectFor(itemRect));
 
     // Uninstall effect on QGraphicsItem.
+    QPointer<CustomEffect> ptr = effect;
     item->setGraphicsEffect(0);
-    QCOMPARE(effect->boundingRect(), QRectF());
+    QVERIFY(!ptr);
 
-    delete effect;
     delete item;
 }
 
@@ -343,11 +343,11 @@ void tst_QGraphicsEffect::draw()
     QCOMPARE(item->numRepaints, 0);
 
     // Make sure uninstalling an effect triggers a repaint.
+    QPointer<CustomEffect> ptr = effect;
     item->setGraphicsEffect(0);
+    QVERIFY(!ptr);
     QTest::qWait(50);
-    QCOMPARE(effect->numRepaints, 0);
     QCOMPARE(item->numRepaints, 1);
-    delete effect;
 }
 
 void tst_QGraphicsEffect::opacity()
diff --git a/tests/auto/qgraphicsitem/tst_qgraphicsitem.cpp b/tests/auto/qgraphicsitem/tst_qgraphicsitem.cpp
index 565a3e7..6266933 100644
--- a/tests/auto/qgraphicsitem/tst_qgraphicsitem.cpp
+++ b/tests/auto/qgraphicsitem/tst_qgraphicsitem.cpp
@@ -7962,6 +7962,22 @@ void tst_QGraphicsItem::setGraphicsEffect()
     delete item;
     QVERIFY(!blurEffect);
     delete anotherItem;
+
+    // Ensure the effect is uninstalled when deleting it
+    item = new QGraphicsRectItem(0, 0, 10, 10);
+    blurEffect = new QGraphicsBlurEffect;
+    item->setGraphicsEffect(blurEffect);
+    delete blurEffect;
+    QVERIFY(!item->graphicsEffect());
+
+    // Ensure the existing effect is uninstalled and deleted when setting a null effect
+    blurEffect = new QGraphicsBlurEffect;
+    item->setGraphicsEffect(blurEffect);
+    item->setGraphicsEffect(0);
+    QVERIFY(!item->graphicsEffect());
+    QVERIFY(!blurEffect);
+
+    delete item;
 }
 
 void tst_QGraphicsItem::panel()
diff --git a/tests/auto/qgraphicsscene/tst_qgraphicsscene.cpp b/tests/auto/qgraphicsscene/tst_qgraphicsscene.cpp
index 38abc3d..c5e57f7 100644
--- a/tests/auto/qgraphicsscene/tst_qgraphicsscene.cpp
+++ b/tests/auto/qgraphicsscene/tst_qgraphicsscene.cpp
@@ -280,6 +280,7 @@ private slots:
     void task160653_selectionChanged();
     void task250680_childClip();
     void taskQTBUG_5904_crashWithDeviceCoordinateCache();
+    void taskQT657_paintIntoCacheWithTransparentParts();
 };
 
 void tst_QGraphicsScene::initTestCase()
@@ -1462,6 +1463,7 @@ void tst_QGraphicsScene::focusItemLostFocus()
 class ClearTestItem : public QGraphicsRectItem
 {
 public:
+    ClearTestItem(QGraphicsItem *parent = 0) : QGraphicsRectItem(parent) {}
     ~ClearTestItem() { qDeleteAll(items); }
     QList<QGraphicsItem *> items;
 };
@@ -1486,6 +1488,11 @@ void tst_QGraphicsScene::clear()
     scene.addItem(secondItem);
     QCOMPARE(scene.items().at(0), firstItem);
     QCOMPARE(scene.items().at(1), secondItem);
+
+    ClearTestItem *thirdItem = new ClearTestItem(firstItem);
+    QGraphicsItem *forthItem = new QGraphicsRectItem(firstItem);
+    thirdItem->items += forthItem;
+
     // must not crash even if firstItem deletes secondItem
     scene.clear();
     QVERIFY(scene.items().isEmpty());
@@ -4264,5 +4271,43 @@ void tst_QGraphicsScene::taskQTBUG_5904_crashWithDeviceCoordinateCache()
     // No crash, then it passed!
 }
 
+void tst_QGraphicsScene::taskQT657_paintIntoCacheWithTransparentParts()
+{
+    QWidget *w = new QWidget();
+    w->setPalette(Qt::blue);
+    w->setGeometry(0, 0, 50, 50);
+
+    QGraphicsScene *scene = new QGraphicsScene();
+    QGraphicsView *view = new QGraphicsView(scene);
+
+    QGraphicsProxyWidget *proxy = scene->addWidget(w);
+    proxy->setCacheMode(QGraphicsItem::DeviceCoordinateCache);
+    proxy->rotate(15);
+
+    view->show();
+    QTest::qWaitForWindowShown(view);
+    w->update(10,10,10,10);
+    QTest::qWait(50);
+
+    QPixmap pix;
+    QGraphicsItemPrivate* itemp = QGraphicsItemPrivate::get(proxy);
+    QPixmapCache::Key key = itemp->extraItemCache()->deviceData.value(view->viewport()).key;
+    QVERIFY(QPixmapCache::find(key, &pix));
+
+    QTransform t = proxy->sceneTransform();
+    // Map from scene coordinates to pixmap coordinates.
+    // X origin in the pixmap is the most-left point
+    // of the item's boundingRect in the scene.
+    qreal adjust = t.mapRect(proxy->boundingRect().toRect()).left();
+    QRect rect = t.mapRect(QRect(10, 10, 10, 10)).adjusted(-adjust, 0, -adjust + 1, 1);
+    QPixmap subpix = pix.copy(rect);
+
+    QImage im = subpix.toImage();
+    for(int i = 0; i < im.width(); i++) {
+        for(int j = 0; j < im.height(); j++)
+            QCOMPARE(qAlpha(im.pixel(i, j)), 255);
+    }
+}
+
 QTEST_MAIN(tst_QGraphicsScene)
 #include "tst_qgraphicsscene.moc"
diff --git a/tests/auto/qlistwidget/tst_qlistwidget.cpp b/tests/auto/qlistwidget/tst_qlistwidget.cpp
index cb8f1e9..863c308 100644
--- a/tests/auto/qlistwidget/tst_qlistwidget.cpp
+++ b/tests/auto/qlistwidget/tst_qlistwidget.cpp
@@ -867,6 +867,7 @@ void tst_QListWidget::moveItemsPriv_data()
     QTest::newRow("Same place") << 5 << 2 << 2 << false;
     QTest::newRow("Up") << 5 << 4 << 2 << true;
     QTest::newRow("Down") << 5 << 2 << 4 << true;
+    QTest::newRow("QTBUG-6532 assert") << 5 << 0 << 1 << false;
 }
 
 void tst_QListWidget::moveItemsPriv()
diff --git a/tests/auto/qmenu/tst_qmenu.cpp b/tests/auto/qmenu/tst_qmenu.cpp
index 7cdfe46..af10ad1 100644
--- a/tests/auto/qmenu/tst_qmenu.cpp
+++ b/tests/auto/qmenu/tst_qmenu.cpp
@@ -82,7 +82,7 @@ private slots:
     void keyboardNavigation_data();
     void keyboardNavigation();
     void focus();
-	void overrideMenuAction();
+    void overrideMenuAction();
     void statusTip();
     void widgetActionFocus();
     void mouseActivation();
@@ -103,12 +103,14 @@ private slots:
     void task258920_mouseBorder();
     void setFixedWidth();
     void deleteActionInTriggered();
+    void pushButtonPopulateOnAboutToShow();
 protected slots:
     void onActivated(QAction*);
     void onHighlighted(QAction*);
     void onStatusMessageChanged(const QString &);
     void onStatusTipTimer();
     void deleteAction(QAction *a) { delete a; }
+    void populateMenu();
 private:
     void createActions();
     QMenu *menus[2], *lastMenu;
@@ -258,6 +260,15 @@ void tst_QMenu::onStatusMessageChanged(const QString &s)
     statustip=s;
 }
 
+void tst_QMenu::populateMenu(){
+    //just adds 3 dummy actions and a separator.
+        lastMenu->addAction("Foo");
+        lastMenu->addAction("Bar");
+        lastMenu->addAction("FooBar");
+        lastMenu->addSeparator();
+
+}
+
 
 //actual tests
 void
@@ -896,7 +907,29 @@ void tst_QMenu::deleteActionInTriggered()
     QVERIFY(!a);
 }
 
+void tst_QMenu::pushButtonPopulateOnAboutToShow()
+{
+    QPushButton b("Test PushButton");
+    b.setWindowFlags(Qt::FramelessWindowHint | Qt::X11BypassWindowManagerHint);
+    lastMenu = new QMenu;
+    b.setMenu(lastMenu);
+    const int scrNumber = QApplication::desktop()->screenNumber(&b);
+    connect(lastMenu, SIGNAL(aboutToShow()), this, SLOT(populateMenu()));
+    b.show();
+    const QRect screen = QApplication::desktop()->screenGeometry(scrNumber);
 
+    b.move(10, screen.bottom()-b.height()-5);
+    QTest::qWaitForWindowShown(&b);
+    QTimer::singleShot(300,lastMenu, SLOT(hide()));
+    QTest::mouseClick(&b, Qt::LeftButton, Qt::NoModifier, b.rect().center());
+    QVERIFY(!lastMenu->geometry().intersects(b.geometry()));
+
+    b.move(10, screen.bottom()-lastMenu->height()-5);
+    QTimer::singleShot(300,lastMenu, SLOT(hide()));
+    QTest::mouseClick(&b, Qt::LeftButton, Qt::NoModifier, b.rect().center());
+    QVERIFY(!lastMenu->geometry().intersects(b.geometry()));
+
+}
 
 
 QTEST_MAIN(tst_QMenu)
diff --git a/tests/auto/qwidget/tst_qwidget.cpp b/tests/auto/qwidget/tst_qwidget.cpp
index 9960f47..3e14b56 100644
--- a/tests/auto/qwidget/tst_qwidget.cpp
+++ b/tests/auto/qwidget/tst_qwidget.cpp
@@ -9549,6 +9549,22 @@ void tst_QWidget::setGraphicsEffect()
     delete widget;
     QVERIFY(!blurEffect);
     delete anotherWidget;
+
+    // Ensure the effect is uninstalled when deleting it
+    widget = new QWidget;
+    blurEffect = new QGraphicsBlurEffect;
+    widget->setGraphicsEffect(blurEffect);
+    delete blurEffect;
+    QVERIFY(!widget->graphicsEffect());
+
+    // Ensure the existing effect is uninstalled and deleted when setting a null effect
+    blurEffect = new QGraphicsBlurEffect;
+    widget->setGraphicsEffect(blurEffect);
+    widget->setGraphicsEffect(0);
+    QVERIFY(!widget->graphicsEffect());
+    QVERIFY(!blurEffect);
+
+    delete widget;
 }
 
 void tst_QWidget::activateWindow()
diff --git a/tools/linguist/lrelease/lrelease.pro b/tools/linguist/lrelease/lrelease.pro
index b13c03e..6beafa3 100644
--- a/tools/linguist/lrelease/lrelease.pro
+++ b/tools/linguist/lrelease/lrelease.pro
@@ -16,7 +16,7 @@ include(../../../src/tools/bootstrap/bootstrap.pri)
 include(../shared/formats.pri)
 include(../shared/proparser.pri)
 
-win32-msvc*:LIBS += advapi32.lib   # for qsettings_win.cpp
+win32:LIBS += -ladvapi32   # for qsettings_win.cpp
 
 target.path=$$[QT_INSTALL_BINS]
 INSTALLS        += target
diff --git a/util/s60pixelmetrics/pixel_metrics.cpp b/util/s60pixelmetrics/pixel_metrics.cpp
index 9507c67..9ba6c8b 100644
--- a/util/s60pixelmetrics/pixel_metrics.cpp
+++ b/util/s60pixelmetrics/pixel_metrics.cpp
@@ -812,13 +812,12 @@ TInt PixelMetrics::PixelMetricValue(QStyle::PixelMetric metric)
             value = PixelMetricMenuValue(metric, mainPaneRect);
             break;
         case QStyle::PM_ButtonIconSize:
+            {
             //lets use voice recorder icons as a base
             //Unfortunately S60 graphics don't separate button bevel graphics from the actual icon.
             //Se we have no means to query the margin from bevel border to "central icon" border.
             //So, we need to make a estimate...
 
-            const TInt varietyForButtons = !landscape ? 0 : 1;
-
             TAknLayoutRect vRMainRect;
             vRMainRect.LayoutRect( mainPaneRect, AknLayoutScalable_Apps::main_vorec_pane() );
 
@@ -833,7 +832,7 @@ TInt PixelMetrics::PixelMetricValue(QStyle::PixelMetric metric)
 
             // 0.32 is the estimate how much the icon occupies of the button bevel area
             value = vRButtonCellGraphicsRect.Rect().Width() * 0.32;
-
+            }
             break;
         case QStyle::PM_SmallIconSize:
             {