Merge remote branch 'origin/4.7' into qt-master-from-4.7

Conflicts:
	src/gui/painting/qpainter.cpp
	src/gui/text/qtextengine.cpp
	tests/auto/qimage/tst_qimage.cpp
	tests/auto/qpainter/tst_qpainter.cpp
	tools/qdoc3/test/assistant.qdocconf
	tools/qdoc3/test/designer.qdocconf
	tools/qdoc3/test/linguist.qdocconf
	tools/qdoc3/test/qmake.qdocconf
	tools/qdoc3/test/qt-build-docs.qdocconf
	tools/qdoc3/test/qt-html-templates.qdocconf
	tools/qdoc3/test/qt-html-templates_zh_CN.qdocconf
	tools/qdoc3/test/qt.qdocconf

11 files changed, 206 insertions, 233 deletions

diff --git a/src/gui/painting/painting.pri b/src/gui/painting/painting.pri
index 4023f65..dfa4a48 100644
--- a/src/gui/painting/painting.pri
+++ b/src/gui/painting/painting.pri
@@ -246,23 +246,8 @@ symbian {
         QMAKE_CXXFLAGS.ARMCC *= -O3
 }
 
-neon:*-g++* {
-    DEFINES += QT_HAVE_NEON
-    HEADERS += painting/qdrawhelper_neon_p.h
-    SOURCES += painting/qdrawhelper_neon.cpp
-    QMAKE_CXXFLAGS *= -mfpu=neon
-
-    DRAWHELPER_NEON_ASM_FILES = ../3rdparty/pixman/pixman-arm-neon-asm.S painting/qdrawhelper_neon_asm.S
-
-    neon_compiler.commands = $$QMAKE_CXX -c
-    neon_compiler.commands += $(CXXFLAGS) $(INCPATH) ${QMAKE_FILE_IN} -o ${QMAKE_FILE_OUT}
-    neon_compiler.dependency_type = TYPE_C
-    neon_compiler.output = ${QMAKE_VAR_OBJECTS_DIR}${QMAKE_FILE_BASE}$${first(QMAKE_EXT_OBJ)}
-    neon_compiler.input = DRAWHELPER_NEON_ASM_FILES
-    neon_compiler.variable_out = OBJECTS
-    neon_compiler.name = compiling[neon] ${QMAKE_FILE_IN}
-    silent:neon_compiler.commands = @echo compiling[neon] ${QMAKE_FILE_IN} && $$neon_compiler.commands
-    QMAKE_EXTRA_COMPILERS += neon_compiler
-}
+NEON_SOURCES += painting/qdrawhelper_neon.cpp
+NEON_HEADERS += painting/qdrawhelper_neon_p.h
+NEON_ASM += ../3rdparty/pixman/pixman-arm-neon-asm.S painting/qdrawhelper_neon_asm.S
 
 include($$PWD/../../3rdparty/zlib_dependency.pri)
diff --git a/src/gui/painting/qdrawhelper.cpp b/src/gui/painting/qdrawhelper.cpp
index f5641a4..eb92d3f 100644
--- a/src/gui/painting/qdrawhelper.cpp
+++ b/src/gui/painting/qdrawhelper.cpp
@@ -7938,8 +7938,10 @@ void qInitDrawhelperAsm()
                                                   uint const_alpha);
             extern void QT_FASTCALL comp_func_solid_SourceOver_sse2(uint *destPixels, int length, uint color, uint const_alpha);
             extern void QT_FASTCALL comp_func_Plus_sse2(uint *dst, const uint *src, int length, uint const_alpha);
+            extern void QT_FASTCALL comp_func_Source_sse2(uint *dst, const uint *src, int length, uint const_alpha);
 
             functionForModeAsm[0] = comp_func_SourceOver_sse2;
+            functionForModeAsm[QPainter::CompositionMode_Source] = comp_func_Source_sse2;
             functionForModeAsm[QPainter::CompositionMode_Plus] = comp_func_Plus_sse2;
             functionForModeSolidAsm[0] = comp_func_solid_SourceOver_sse2;
 
diff --git a/src/gui/painting/qdrawhelper_p.h b/src/gui/painting/qdrawhelper_p.h
index 1a87127..d04c70d 100644
--- a/src/gui/painting/qdrawhelper_p.h
+++ b/src/gui/painting/qdrawhelper_p.h
@@ -314,18 +314,61 @@ struct QSpanData
     void adjustSpanMethods();
 };
 
+#if defined(Q_CC_RVCT)
+#  pragma push
+#  pragma arm
+#endif
+Q_STATIC_INLINE_FUNCTION uint INTERPOLATE_PIXEL_255(uint x, uint a, uint y, uint b) {
+    uint t = (x & 0xff00ff) * a + (y & 0xff00ff) * b;
+    t = (t + ((t >> 8) & 0xff00ff) + 0x800080) >> 8;
+    t &= 0xff00ff;
 
-Q_STATIC_INLINE_FUNCTION uint BYTE_MUL_RGB16(uint x, uint a) {
-    a += 1;
-    uint t = (((x & 0x07e0)*a) >> 8) & 0x07e0;
-    t |= (((x & 0xf81f)*(a>>2)) >> 6) & 0xf81f;
-    return t;
+    x = ((x >> 8) & 0xff00ff) * a + ((y >> 8) & 0xff00ff) * b;
+    x = (x + ((x >> 8) & 0xff00ff) + 0x800080);
+    x &= 0xff00ff00;
+    x |= t;
+    return x;
 }
+#if defined(Q_CC_RVCT)
+#  pragma pop
+#endif
 
-Q_STATIC_INLINE_FUNCTION uint BYTE_MUL_RGB16_32(uint x, uint a) {
-    uint t = (((x & 0xf81f07e0) >> 5)*a) & 0xf81f07e0;
-    t |= (((x & 0x07e0f81f)*a) >> 5) & 0x07e0f81f;
-    return t;
+#if QT_POINTER_SIZE == 8 // 64-bit versions
+
+Q_STATIC_INLINE_FUNCTION uint INTERPOLATE_PIXEL_256(uint x, uint a, uint y, uint b) {
+    quint64 t = (((quint64(x)) | ((quint64(x)) << 24)) & 0x00ff00ff00ff00ff) * a;
+    t += (((quint64(y)) | ((quint64(y)) << 24)) & 0x00ff00ff00ff00ff) * b;
+    t >>= 8;
+    t &= 0x00ff00ff00ff00ff;
+    return (uint(t)) | (uint(t >> 24));
+}
+
+Q_STATIC_INLINE_FUNCTION uint BYTE_MUL(uint x, uint a) {
+    quint64 t = (((quint64(x)) | ((quint64(x)) << 24)) & 0x00ff00ff00ff00ff) * a;
+    t = (t + ((t >> 8) & 0xff00ff00ff00ff) + 0x80008000800080) >> 8;
+    t &= 0x00ff00ff00ff00ff;
+    return (uint(t)) | (uint(t >> 24));
+}
+
+Q_STATIC_INLINE_FUNCTION uint PREMUL(uint x) {
+    uint a = x >> 24;
+    quint64 t = (((quint64(x)) | ((quint64(x)) << 24)) & 0x00ff00ff00ff00ff) * a;
+    t = (t + ((t >> 8) & 0xff00ff00ff00ff) + 0x80008000800080) >> 8;
+    t &= 0x000000ff00ff00ff;
+    return (uint(t)) | (uint(t >> 24)) | (a << 24);
+}
+
+#else // 32-bit versions
+
+Q_STATIC_INLINE_FUNCTION uint INTERPOLATE_PIXEL_256(uint x, uint a, uint y, uint b) {
+    uint t = (x & 0xff00ff) * a + (y & 0xff00ff) * b;
+    t >>= 8;
+    t &= 0xff00ff;
+
+    x = ((x >> 8) & 0xff00ff) * a + ((y >> 8) & 0xff00ff) * b;
+    x &= 0xff00ff00;
+    x |= t;
+    return x;
 }
 
 #if defined(Q_CC_RVCT)
@@ -359,6 +402,21 @@ Q_STATIC_INLINE_FUNCTION uint PREMUL(uint x) {
     x |= t | (a << 24);
     return x;
 }
+#endif
+
+
+Q_STATIC_INLINE_FUNCTION uint BYTE_MUL_RGB16(uint x, uint a) {
+    a += 1;
+    uint t = (((x & 0x07e0)*a) >> 8) & 0x07e0;
+    t |= (((x & 0xf81f)*(a>>2)) >> 6) & 0xf81f;
+    return t;
+}
+
+Q_STATIC_INLINE_FUNCTION uint BYTE_MUL_RGB16_32(uint x, uint a) {
+    uint t = (((x & 0xf81f07e0) >> 5)*a) & 0xf81f07e0;
+    t |= (((x & 0x07e0f81f)*a) >> 5) & 0x07e0f81f;
+    return t;
+}
 
 #define INV_PREMUL(p)                                   \
     (qAlpha(p) == 0 ? 0 :                               \
@@ -1847,70 +1905,6 @@ inline int qBlue565(quint16 rgb) {
     return (b << 3) | (b >> 2);
 }
 
-#if 1
-Q_STATIC_INLINE_FUNCTION uint INTERPOLATE_PIXEL_256(uint x, uint a, uint y, uint b) {
-    uint t = (x & 0xff00ff) * a + (y & 0xff00ff) * b;
-    t >>= 8;
-    t &= 0xff00ff;
-
-    x = ((x >> 8) & 0xff00ff) * a + ((y >> 8) & 0xff00ff) * b;
-    x &= 0xff00ff00;
-    x |= t;
-    return x;
-}
-
-#if defined(Q_CC_RVCT)
-#  pragma push
-#  pragma arm
-#endif
-Q_STATIC_INLINE_FUNCTION uint INTERPOLATE_PIXEL_255(uint x, uint a, uint y, uint b) {
-    uint t = (x & 0xff00ff) * a + (y & 0xff00ff) * b;
-    t = (t + ((t >> 8) & 0xff00ff) + 0x800080) >> 8;
-    t &= 0xff00ff;
-
-    x = ((x >> 8) & 0xff00ff) * a + ((y >> 8) & 0xff00ff) * b;
-    x = (x + ((x >> 8) & 0xff00ff) + 0x800080);
-    x &= 0xff00ff00;
-    x |= t;
-    return x;
-}
-#if defined(Q_CC_RVCT)
-#  pragma pop
-#endif
-#else
-// possible implementation for 64 bit
-Q_STATIC_INLINE_FUNCTION uint INTERPOLATE_PIXEL_256(uint x, uint a, uint y, uint b) {
-    ulong t = (((ulong(x)) | ((ulong(x)) << 24)) & 0x00ff00ff00ff00ff) * a;
-    t += (((ulong(y)) | ((ulong(y)) << 24)) & 0x00ff00ff00ff00ff) * b;
-    t >>= 8;
-    t &= 0x00ff00ff00ff00ff;
-    return (uint(t)) | (uint(t >> 24));
-}
-
-Q_STATIC_INLINE_FUNCTION uint INTERPOLATE_PIXEL_255(uint x, uint a, uint y, uint b) {
-    ulong t = (((ulong(x)) | ((ulong(x)) << 24)) & 0x00ff00ff00ff00ff) * a;
-    t += (((ulong(y)) | ((ulong(y)) << 24)) & 0x00ff00ff00ff00ff) * b;
-    t = (t + ((t >> 8) & 0xff00ff00ff00ff) + 0x80008000800080);
-    t &= 0x00ff00ff00ff00ff;
-    return (uint(t)) | (uint(t >> 24));
-}
-
-Q_STATIC_INLINE_FUNCTION uint BYTE_MUL(uint x, uint a) {
-    ulong t = (((ulong(x)) | ((ulong(x)) << 24)) & 0x00ff00ff00ff00ff) * a;
-    t = (t + ((t >> 8) & 0xff00ff00ff00ff) + 0x80008000800080);
-    t &= 0x00ff00ff00ff00ff;
-    return (uint(t)) | (uint(t >> 24));
-}
-
-Q_STATIC_INLINE_FUNCTION uint PREMUL(uint x) {
-    uint a = x >> 24;
-    ulong t = (((ulong(x)) | ((ulong(x)) << 24)) & 0x00ff00ff00ff00ff) * a;
-    t = (t + ((t >> 8) & 0xff00ff00ff00ff) + 0x80008000800080);
-    t &= 0x00ff00ff00ff00ff;
-    return (uint(t)) | (uint(t >> 24)) | 0xff000000;
-}
-#endif
-
 const uint qt_bayer_matrix[16][16] = {
     { 0x1, 0xc0, 0x30, 0xf0, 0xc, 0xcc, 0x3c, 0xfc,
       0x3, 0xc3, 0x33, 0xf3, 0xf, 0xcf, 0x3f, 0xff},
diff --git a/src/gui/painting/qdrawhelper_sse2.cpp b/src/gui/painting/qdrawhelper_sse2.cpp
index e090ae5..22c0384 100644
--- a/src/gui/painting/qdrawhelper_sse2.cpp
+++ b/src/gui/painting/qdrawhelper_sse2.cpp
@@ -112,9 +112,7 @@ void qt_blend_rgb32_on_rgb32_sse2(uchar *destPixels, int dbpl,
                 int x = 0;
 
                 // First, align dest to 16 bytes:
-                const int offsetToAlignOn16Bytes = (4 - ((reinterpret_cast<quintptr>(dst) >> 2) & 0x3)) & 0x3;
-                const int prologLength = qMin(w, offsetToAlignOn16Bytes);
-                for (; x < prologLength; ++x) {
+                ALIGNMENT_PROLOGUE_16BYTES(dst, x, w) {
                     quint32 s = src[x];
                     s = BYTE_MUL(s, const_alpha);
                     dst[x] = INTERPOLATE_PIXEL_255(src[x], const_alpha, dst[x], one_minus_const_alpha);
@@ -182,12 +180,10 @@ inline int comp_func_Plus_one_pixel(uint d, const uint s)
 void QT_FASTCALL comp_func_Plus_sse2(uint *dst, const uint *src, int length, uint const_alpha)
 {
     int x = 0;
-    const int offsetToAlignOn16Bytes = (4 - ((reinterpret_cast<quintptr>(dst) >> 2) & 0x3)) & 0x3;
-    const int prologLength = qMin(length, offsetToAlignOn16Bytes);
 
     if (const_alpha == 255) {
         // 1) Prologue: align destination on 16 bytes
-        for (; x < prologLength; ++x)
+        ALIGNMENT_PROLOGUE_16BYTES(dst, x, length)
             dst[x] = comp_func_Plus_one_pixel(dst[x], src[x]);
 
         // 2) composition with SSE2
@@ -208,7 +204,7 @@ void QT_FASTCALL comp_func_Plus_sse2(uint *dst, const uint *src, int length, uin
         const __m128i oneMinusConstAlpha =  _mm_set1_epi16(one_minus_const_alpha);
 
         // 1) Prologue: align destination on 16 bytes
-        for (; x < prologLength; ++x)
+        ALIGNMENT_PROLOGUE_16BYTES(dst, x, length)
             dst[x] = comp_func_Plus_one_pixel_const_alpha(dst[x], src[x], const_alpha, one_minus_const_alpha);
 
         const __m128i half = _mm_set1_epi16(0x80);
@@ -229,6 +225,37 @@ void QT_FASTCALL comp_func_Plus_sse2(uint *dst, const uint *src, int length, uin
     }
 }
 
+void QT_FASTCALL comp_func_Source_sse2(uint *dst, const uint *src, int length, uint const_alpha)
+{
+    if (const_alpha == 255) {
+        ::memcpy(dst, src, length * sizeof(uint));
+    } else {
+        const int ialpha = 255 - const_alpha;
+
+        int x = 0;
+
+        // 1) prologue, align on 16 bytes
+        ALIGNMENT_PROLOGUE_16BYTES(dst, x, length)
+            dst[x] = INTERPOLATE_PIXEL_255(src[x], const_alpha, dst[x], ialpha);
+
+        // 2) interpolate pixels with SSE2
+        const __m128i half = _mm_set1_epi16(0x80);
+        const __m128i colorMask = _mm_set1_epi32(0x00ff00ff);
+        const __m128i constAlphaVector = _mm_set1_epi16(const_alpha);
+        const __m128i oneMinusConstAlpha =  _mm_set1_epi16(ialpha);
+        for (; x < length - 3; x += 4) {
+            const __m128i srcVector = _mm_loadu_si128((__m128i *)&src[x]);
+            __m128i dstVector = _mm_load_si128((__m128i *)&dst[x]);
+            INTERPOLATE_PIXEL_255_SSE2(dstVector, srcVector, dstVector, constAlphaVector, oneMinusConstAlpha, colorMask, half)
+            _mm_store_si128((__m128i *)&dst[x], dstVector);
+        }
+
+        // 3) Epilogue
+        for (; x < length; ++x)
+            dst[x] = INTERPOLATE_PIXEL_255(src[x], const_alpha, dst[x], ialpha);
+    }
+}
+
 void qt_memfill32_sse2(quint32 *dest, quint32 value, int count)
 {
     if (count < 7) {
diff --git a/src/gui/painting/qdrawingprimitive_sse2_p.h b/src/gui/painting/qdrawingprimitive_sse2_p.h
index 18355c2..d8f6bf5 100644
--- a/src/gui/painting/qdrawingprimitive_sse2_p.h
+++ b/src/gui/painting/qdrawingprimitive_sse2_p.h
@@ -143,9 +143,7 @@ QT_BEGIN_NAMESPACE
     int x = 0; \
 \
     /* First, get dst aligned. */ \
-    const int offsetToAlignOn16Bytes = (4 - ((reinterpret_cast<quintptr>(dst) >> 2) & 0x3)) & 0x3;\
-    const int prologLength = qMin(length, offsetToAlignOn16Bytes);\
-    for (; x < prologLength; ++x) { \
+    ALIGNMENT_PROLOGUE_16BYTES(dst, x, length) { \
         uint s = src[x]; \
         if (s >= 0xff000000) \
             dst[x] = s; \
@@ -202,9 +200,7 @@ QT_BEGIN_NAMESPACE
 { \
     int x = 0; \
 \
-    const int offsetToAlignOn16Bytes = (4 - ((reinterpret_cast<quintptr>(dst) >> 2) & 0x3)) & 0x3;\
-    const int prologLength = qMin(length, offsetToAlignOn16Bytes);\
-    for (; x < prologLength; ++x) { \
+    ALIGNMENT_PROLOGUE_16BYTES(dst, x, length) { \
         quint32 s = src[x]; \
         if (s != 0) { \
             s = BYTE_MUL(s, const_alpha); \
diff --git a/src/gui/painting/qgraphicssystem_runtime.cpp b/src/gui/painting/qgraphicssystem_runtime.cpp
index 3438137..2828e9d 100644
--- a/src/gui/painting/qgraphicssystem_runtime.cpp
+++ b/src/gui/painting/qgraphicssystem_runtime.cpp
@@ -53,10 +53,8 @@ QT_BEGIN_NAMESPACE
 static int qt_pixmap_serial = 0;
 
 #define READBACK(f)                                         \
-    m_graphicsSystem->decreaseMemoryUsage(memoryUsage());   \
     f                                                       \
-    readBackInfo();                                         \
-    m_graphicsSystem->increaseMemoryUsage(memoryUsage());   \
+    readBackInfo();
 
 
 class QDeferredGraphicsSystemChange : public QObject
@@ -252,16 +250,8 @@ QPixmapData* QRuntimePixmapData::runtimeData() const
     return m_data;
 }
 
-uint QRuntimePixmapData::memoryUsage() const
-{
-    if(is_null || d == 0)
-        return 0;
-    return w * h * (d / 8);
-}
-
-
 QRuntimeWindowSurface::QRuntimeWindowSurface(const QRuntimeGraphicsSystem *gs, QWidget *window)
-    : QWindowSurface(window), m_windowSurface(0), m_pendingWindowSurface(0), m_graphicsSystem(gs)
+    : QWindowSurface(window), m_graphicsSystem(gs)
 {
 
 }
@@ -269,7 +259,6 @@ QRuntimeWindowSurface::QRuntimeWindowSurface(const QRuntimeGraphicsSystem *gs, Q
 QRuntimeWindowSurface::~QRuntimeWindowSurface()
 {
     m_graphicsSystem->removeWindowSurface(this);
-    delete m_windowSurface;
 }
 
 QPaintDevice *QRuntimeWindowSurface::paintDevice()
@@ -288,16 +277,13 @@ void QRuntimeWindowSurface::flush(QWidget *widget, const QRegion &region,
 #ifdef QT_DEBUG
         qDebug() << "QRuntimeWindowSurface::flush() - destroy pending window surface";
 #endif
-        delete m_pendingWindowSurface;
-        m_pendingWindowSurface = 0;
+        m_pendingWindowSurface.reset();
     }
 }
 
 void QRuntimeWindowSurface::setGeometry(const QRect &rect)
 {
-    m_graphicsSystem->decreaseMemoryUsage(memoryUsage());
     m_windowSurface->setGeometry(rect);
-    m_graphicsSystem->increaseMemoryUsage(memoryUsage());
 }
 
 bool QRuntimeWindowSurface::scroll(const QRegion &area, int dx, int dy)
@@ -330,27 +316,21 @@ QPoint QRuntimeWindowSurface::offset(const QWidget *widget) const
     return m_windowSurface->offset(widget);
 }
 
-uint QRuntimeWindowSurface::memoryUsage() const
-{
-    QPaintDevice *pdev = m_windowSurface->paintDevice();
-    if (pdev && pdev->depth() != 0)
-        return pdev->width() * pdev->height() * (pdev->depth()/8);
-
-    return 0;
-}
-
 QRuntimeGraphicsSystem::QRuntimeGraphicsSystem()
-    : m_memoryUsage(0), m_windowSurfaceDestroyPolicy(DestroyImmediately),
-	m_graphicsSystem(0), m_graphicsSystemChangeMemoryLimit(0)
+    : m_windowSurfaceDestroyPolicy(DestroyImmediately),
+      m_graphicsSystem(0)
 {
     QApplicationPrivate::graphics_system_name = QLatin1String("runtime");
     QApplicationPrivate::runtime_graphics_system = true;
 
+#ifdef QT_DEFAULT_RUNTIME_SYSTEM
+    m_graphicsSystemName = QLatin1String(QT_DEFAULT_RUNTIME_SYSTEM);
+    if (m_graphicsSystemName.isNull())
+#endif
+        m_graphicsSystemName = QLatin1String("raster");
+
 #ifdef Q_OS_SYMBIAN
-    m_graphicsSystemName = QLatin1String("openvg");
     m_windowSurfaceDestroyPolicy = DestroyAfterFirstFlush;
-#else
-    m_graphicsSystemName = QLatin1String("raster");
 #endif
 
     m_graphicsSystem = QGraphicsSystemFactory::create(m_graphicsSystemName);
@@ -373,51 +353,30 @@ QWindowSurface *QRuntimeGraphicsSystem::createWindowSurface(QWidget *widget) con
 {
     Q_ASSERT(m_graphicsSystem);
     QRuntimeWindowSurface *rtSurface = new QRuntimeWindowSurface(this, widget);
-    rtSurface->m_windowSurface = m_graphicsSystem->createWindowSurface(widget);
+    rtSurface->m_windowSurface.reset(m_graphicsSystem->createWindowSurface(widget));
     widget->setWindowSurface(rtSurface);
     m_windowSurfaces << rtSurface;
-    increaseMemoryUsage(rtSurface->memoryUsage());
     return rtSurface;
 }
 
-/*!
-    Sets graphics system when resource memory consumption is under /a memoryUsageLimit.
-*/
-void QRuntimeGraphicsSystem::setGraphicsSystem(const QString &name, uint memoryUsageLimit)
-{
-#ifdef QT_DEBUG
-    qDebug() << "QRuntimeGraphicsSystem::setGraphicsSystem( "<< name <<", " << memoryUsageLimit << ")";
-    qDebug() << "        current approximated graphics system memory usage " << memoryUsage() << " bytes";
-#endif
-    if (memoryUsage() >= memoryUsageLimit) {
-        m_graphicsSystemChangeMemoryLimit = memoryUsageLimit;
-        m_pendingGraphicsSystemName = name;
-    } else {
-        setGraphicsSystem(name);
-    }
-}
-
 void QRuntimeGraphicsSystem::setGraphicsSystem(const QString &name)
 {
     if (m_graphicsSystemName == name)
         return;
 #ifdef QT_DEBUG
     qDebug() << "QRuntimeGraphicsSystem::setGraphicsSystem( " << name << " )";
-    qDebug() << "        current approximated graphics system memory usage "<< memoryUsage() << " bytes";
 #endif
-    delete m_graphicsSystem;
+    QGraphicsSystem *oldSystem = m_graphicsSystem;
     m_graphicsSystem = QGraphicsSystemFactory::create(name);
     m_graphicsSystemName = name;
 
     Q_ASSERT(m_graphicsSystem);
 
-    m_graphicsSystemChangeMemoryLimit = 0;
     m_pendingGraphicsSystemName = QString();
 
     for (int i = 0; i < m_pixmapDatas.size(); ++i) {
         QRuntimePixmapData *proxy = m_pixmapDatas.at(i);
         QPixmapData *newData = m_graphicsSystem->createPixmapData(proxy->m_data);
-        // ### TODO Optimize. Openvg and s60raster graphics systems could switch internal ARGB32_PRE QImage buffers.
         newData->fromImage(proxy->m_data->toImage(), Qt::NoOpaqueDetection);
         delete proxy->m_data;
         proxy->m_data = newData;
@@ -428,58 +387,26 @@ void QRuntimeGraphicsSystem::setGraphicsSystem(const QString &name)
         QRuntimeWindowSurface *proxy = m_windowSurfaces.at(i);
         QWidget *widget = proxy->m_windowSurface->window();
 
-        if(m_windowSurfaceDestroyPolicy == DestroyImmediately) {
-            delete proxy->m_windowSurface;
-            proxy->m_pendingWindowSurface = 0;
-        } else {
-            proxy->m_pendingWindowSurface = proxy->m_windowSurface;
-        }
+        if(m_windowSurfaceDestroyPolicy == DestroyAfterFirstFlush)
+            proxy->m_pendingWindowSurface.reset(proxy->m_windowSurface.take());
 
-        proxy->m_windowSurface = m_graphicsSystem->createWindowSurface(widget);
+        proxy->m_windowSurface.reset(m_graphicsSystem->createWindowSurface(widget));
         qt_widget_private(widget)->invalidateBuffer(widget->rect());
     }
+
+    delete oldSystem;
 }
 
 void QRuntimeGraphicsSystem::removePixmapData(QRuntimePixmapData *pixmapData) const
 {
     int index = m_pixmapDatas.lastIndexOf(pixmapData);
     m_pixmapDatas.removeAt(index);
-    decreaseMemoryUsage(pixmapData->memoryUsage(), true);
 }
 
 void QRuntimeGraphicsSystem::removeWindowSurface(QRuntimeWindowSurface *windowSurface) const
 {
     int index = m_windowSurfaces.lastIndexOf(windowSurface);
     m_windowSurfaces.removeAt(index);
-    decreaseMemoryUsage(windowSurface->memoryUsage(), true);
-}
-
-void QRuntimeGraphicsSystem::increaseMemoryUsage(uint amount) const
-{
-    m_memoryUsage += amount;
-
-    if (m_graphicsSystemChangeMemoryLimit &&
-        m_memoryUsage < m_graphicsSystemChangeMemoryLimit) {
-
-        QRuntimeGraphicsSystem *gs = const_cast<QRuntimeGraphicsSystem*>(this);
-        QDeferredGraphicsSystemChange *deferredChange =
-                    new QDeferredGraphicsSystemChange(gs, m_pendingGraphicsSystemName);
-        deferredChange->launch();
-    }
-}
-
-void QRuntimeGraphicsSystem::decreaseMemoryUsage(uint amount, bool persistent) const
-{
-    m_memoryUsage -= amount;
-
-    if (persistent && m_graphicsSystemChangeMemoryLimit &&
-        m_memoryUsage < m_graphicsSystemChangeMemoryLimit) {
-
-        QRuntimeGraphicsSystem *gs = const_cast<QRuntimeGraphicsSystem*>(this);
-        QDeferredGraphicsSystemChange *deferredChange =
-                    new QDeferredGraphicsSystemChange(gs, m_pendingGraphicsSystemName);
-        deferredChange->launch();
-    }
 }
 
 #include "qgraphicssystem_runtime.moc"
diff --git a/src/gui/painting/qgraphicssystem_runtime_p.h b/src/gui/painting/qgraphicssystem_runtime_p.h
index 7aab89c..0232241 100644
--- a/src/gui/painting/qgraphicssystem_runtime_p.h
+++ b/src/gui/painting/qgraphicssystem_runtime_p.h
@@ -104,8 +104,6 @@ public:
 
     virtual QPixmapData *runtimeData() const;
 
-    virtual uint memoryUsage() const;
-
 private:
     const QRuntimeGraphicsSystem *m_graphicsSystem;
 
@@ -131,10 +129,8 @@ public:
 
     virtual QPoint offset(const QWidget *widget) const;
 
-    virtual uint memoryUsage() const;
-
-    QWindowSurface *m_windowSurface;
-    QWindowSurface *m_pendingWindowSurface;
+    QScopedPointer<QWindowSurface> m_windowSurface;
+    QScopedPointer<QWindowSurface> m_pendingWindowSurface;
 
 private:
     const QRuntimeGraphicsSystem *m_graphicsSystem;
@@ -159,7 +155,6 @@ public:
     void removePixmapData(QRuntimePixmapData *pixmapData) const;
     void removeWindowSurface(QRuntimeWindowSurface *windowSurface) const;
 
-    void setGraphicsSystem(const QString &name, uint memoryUsageLimit);
     void setGraphicsSystem(const QString &name);
     QString graphicsSystemName() const { return m_graphicsSystemName; }
 
@@ -170,22 +165,14 @@ public:
 
     int windowSurfaceDestroyPolicy() const { return m_windowSurfaceDestroyPolicy; }
 
-    uint memoryUsage() const { return m_memoryUsage; }
-
-private:
-
-    void increaseMemoryUsage(uint amount) const;
-    void decreaseMemoryUsage(uint amount, bool persistent = false) const;
 
 private:
-    mutable uint m_memoryUsage;
     int m_windowSurfaceDestroyPolicy;
     QGraphicsSystem *m_graphicsSystem;
     mutable QList<QRuntimePixmapData *> m_pixmapDatas;
     mutable QList<QRuntimeWindowSurface *> m_windowSurfaces;
     QString m_graphicsSystemName;
 
-    uint m_graphicsSystemChangeMemoryLimit;
     QString m_pendingGraphicsSystemName;
 
     friend class QRuntimePixmapData;
diff --git a/src/gui/painting/qpaintengine_x11.cpp b/src/gui/painting/qpaintengine_x11.cpp
index 910b2df..e521e01 100644
--- a/src/gui/painting/qpaintengine_x11.cpp
+++ b/src/gui/painting/qpaintengine_x11.cpp
@@ -696,11 +696,10 @@ void QX11PaintEngine::drawLines(const QLine *lines, int lineCount)
                 linef = d->matrix.map(QLineF(lines[i]));
             }
             if (clipLine(&linef, d->polygonClipper.boundingRect())) {
-                int x1 = qRound(linef.x1() + aliasedCoordinateDelta);
-                int y1 = qRound(linef.y1() + aliasedCoordinateDelta);
-                int x2 = qRound(linef.x2() + aliasedCoordinateDelta);
-                int y2 = qRound(linef.y2() + aliasedCoordinateDelta);
-
+                int x1 = qFloor(linef.x1() + aliasedCoordinateDelta);
+                int y1 = qFloor(linef.y1() + aliasedCoordinateDelta);
+                int x2 = qFloor(linef.x2() + aliasedCoordinateDelta);
+                int y2 = qFloor(linef.y2() + aliasedCoordinateDelta);
                 XDrawLine(d->dpy, d->hd, d->gc, x1, y1, x2, y2);
             }
         }
@@ -730,11 +729,10 @@ void QX11PaintEngine::drawLines(const QLineF *lines, int lineCount)
         for (int i = 0; i < lineCount; ++i) {
             QLineF linef = d->matrix.map(lines[i]);
             if (clipLine(&linef, d->polygonClipper.boundingRect())) {
-                int x1 = qRound(linef.x1() + aliasedCoordinateDelta);
-                int y1 = qRound(linef.y1() + aliasedCoordinateDelta);
-                int x2 = qRound(linef.x2() + aliasedCoordinateDelta);
-                int y2 = qRound(linef.y2() + aliasedCoordinateDelta);
-
+                int x1 = qFloor(linef.x1() + aliasedCoordinateDelta);
+                int y1 = qFloor(linef.y1() + aliasedCoordinateDelta);
+                int x2 = qFloor(linef.x2() + aliasedCoordinateDelta);
+                int y2 = qFloor(linef.y2() + aliasedCoordinateDelta);
                 XDrawLine(d->dpy, d->hd, d->gc, x1, y1, x2, y2);
             }
         }
@@ -1690,8 +1688,8 @@ void QX11PaintEnginePrivate::strokePolygon_dev(const QPointF *polygonPoints, int
     if (clippedCount > 0) {
         QVarLengthArray<XPoint> xpoints(clippedCount);
         for (int i = 0; i < clippedCount; ++i) {
-            xpoints[i].x = qRound(clippedPoints[i].x + aliasedCoordinateDelta);
-            xpoints[i].y = qRound(clippedPoints[i].y + aliasedCoordinateDelta);
+            xpoints[i].x = qFloor(clippedPoints[i].x + aliasedCoordinateDelta);
+            xpoints[i].y = qFloor(clippedPoints[i].y + aliasedCoordinateDelta);
         }
         uint numberPoints = qMin(clippedCount, xlibMaxLinePoints);
         XPoint *pts = xpoints.data();
diff --git a/src/gui/painting/qpaintengineex.cpp b/src/gui/painting/qpaintengineex.cpp
index e0746fb..881bd6e 100644
--- a/src/gui/painting/qpaintengineex.cpp
+++ b/src/gui/painting/qpaintengineex.cpp
@@ -831,7 +831,7 @@ void QPaintEngineEx::drawEllipse(const QRectF &r)
 
     int point_count = 0;
     x.points[0] = qt_curves_for_arc(r, 0, -360, x.points + 1, &point_count);
-    QVectorPath vp((qreal *) pts, 13, qpaintengineex_ellipse_types, QVectorPath::EllipseHint);
+    QVectorPath vp((qreal *) pts, point_count, qpaintengineex_ellipse_types, QVectorPath::EllipseHint);
     draw(vp);
 }
 
diff --git a/src/gui/painting/qpainter.cpp b/src/gui/painting/qpainter.cpp
index c4de7f0..314f349 100644
--- a/src/gui/painting/qpainter.cpp
+++ b/src/gui/painting/qpainter.cpp
@@ -88,14 +88,19 @@ bool qt_show_painter_debug_output = true;
 
 extern QPixmap qt_pixmapForBrush(int style, bool invert);
 
-static void drawTextItemDecoration(QPainter *painter, const QPointF &pos, QFontEngine *fe,
-                                   QTextCharFormat::UnderlineStyle underlineStyle,
-                                   QTextItemInt::RenderFlags flags, qreal width,
-                                   const QTextCharFormat &charFormat);
 void qt_format_text(const QFont &font,
                     const QRectF &_r, int tf, const QTextOption *option, const QString& str, QRectF *brect,
                     int tabstops, int* tabarray, int tabarraylen,
                     QPainter *painter);
+static void drawTextItemDecoration(QPainter *painter, const QPointF &pos, const QFontEngine *fe,
+                                   QTextCharFormat::UnderlineStyle underlineStyle,
+                                   QTextItem::RenderFlags flags, qreal width,
+                                   const QTextCharFormat &charFormat);
+// Helper function to calculate left most position, width and flags for decoration drawing
+static void drawDecorationForGlyphs(QPainter *painter, const glyph_t *glyphArray,
+                                    const QFixedPoint *positions, int glyphCount,
+                                    QFontEngine *fontEngine, const QFont &font,
+                                    const QTextCharFormat &charFormat);
 
 static inline QGradient::CoordinateMode coordinateMode(const QBrush &brush)
 {
@@ -6051,6 +6056,10 @@ void QPainter::drawStaticText(const QPointF &topLeftPosition, const QStaticText
             currentColor = item->color;
         }
         d->extended->drawStaticTextItem(item);
+
+        drawDecorationForGlyphs(this, item->glyphs, item->glyphPositions,
+                                item->numGlyphs, item->fontEngine, staticText_d->font,
+                                QTextCharFormat());
     }
     if (currentColor != oldPen.color())
         setPen(oldPen);
@@ -6418,9 +6427,9 @@ static QPixmap generateWavyPixmap(qreal maxRadius, const QPen &pen)
     return pixmap;
 }
 
-static void drawTextItemDecoration(QPainter *painter, const QPointF &pos, QFontEngine *fe,
+static void drawTextItemDecoration(QPainter *painter, const QPointF &pos, const QFontEngine *fe,
                                    QTextCharFormat::UnderlineStyle underlineStyle,
-                                   QTextItemInt::RenderFlags flags, qreal width,
+                                   QTextItem::RenderFlags flags, qreal width,
                                    const QTextCharFormat &charFormat)
 {
     if (underlineStyle == QTextCharFormat::NoUnderline
@@ -6494,6 +6503,50 @@ static void drawTextItemDecoration(QPainter *painter, const QPointF &pos, QFontE
     painter->setBrush(oldBrush);
 }
 
+static void drawDecorationForGlyphs(QPainter *painter, const glyph_t *glyphArray,
+                                    const QFixedPoint *positions, int glyphCount,
+                                    QFontEngine *fontEngine, const QFont &font,
+                                    const QTextCharFormat &charFormat)
+{
+    if (!(font.underline() || font.strikeOut() || font.overline()))
+        return;
+
+    QFixed leftMost;
+    QFixed rightMost;
+    QFixed baseLine;
+    for (int i=0; i<glyphCount; ++i) {
+        glyph_metrics_t gm = fontEngine->boundingBox(glyphArray[i]);
+        if (i == 0 || leftMost > positions[i].x)
+            leftMost = positions[i].x;
+
+        // We don't support glyphs that do not share a common baseline. If this turns out to
+        // be a relevant use case, then we need to find clusters of glyphs that share a baseline
+        // and do a drawTextItemDecorations call per cluster.
+        if (i == 0 || baseLine < positions[i].y)
+            baseLine = positions[i].y;
+
+        // We use the advance rather than the actual bounds to match the algorithm in drawText()
+        if (i == 0 || rightMost < positions[i].x + gm.xoff)
+            rightMost = positions[i].x + gm.xoff;
+    }
+
+    QFixed width = rightMost - leftMost;
+    QTextItem::RenderFlags flags = 0;
+
+    if (font.underline())
+        flags |= QTextItem::Underline;
+    if (font.overline())
+        flags |= QTextItem::Overline;
+    if (font.strikeOut())
+        flags |= QTextItem::StrikeOut;
+
+    drawTextItemDecoration(painter, QPointF(leftMost.toReal(), baseLine.toReal()),
+                           fontEngine,
+                           font.underline() ? QTextCharFormat::SingleUnderline
+                                            : QTextCharFormat::NoUnderline, flags,
+                           width.toReal(), charFormat);
+}
+
 void QPainter::drawTextItem(const QPointF &p, const QTextItem &_ti)
 {
 #ifdef QT_DEBUG_DRAW
diff --git a/src/gui/painting/qwindowsurface_s60.cpp b/src/gui/painting/qwindowsurface_s60.cpp
index 477bd93..8bac1f5 100644
--- a/src/gui/painting/qwindowsurface_s60.cpp
+++ b/src/gui/painting/qwindowsurface_s60.cpp
@@ -67,10 +67,14 @@ QS60WindowSurface::QS60WindowSurface(QWidget* widget)
 
     TDisplayMode mode = S60->screenDevice()->DisplayMode();
     bool isOpaque = qt_widget_private(widget)->isOpaque;
-    if (mode == EColor16MA && isOpaque)
-        mode = EColor16MU; // Faster since 16MU -> 16MA is typically accelerated
-    else if (mode == EColor16MU && !isOpaque)
-        mode = EColor16MA; // Try for transparency anyway
+    if (isOpaque) {
+        mode = EColor16MU;
+    } else  {
+        if (QSysInfo::symbianVersion() >= QSysInfo::SV_SF_3)
+            mode = Q_SYMBIAN_ECOLOR16MAP; // Symbian^3 WServ has support for ARGB32_PRE
+        else
+            mode = EColor16MA; // Symbian prior to Symbian^3 sw accelerates EColor16MA
+    }
 
     // We create empty CFbsBitmap here -> it will be resized in setGeometry
     CFbsBitmap *bitmap = q_check_ptr(new CFbsBitmap);	// CBase derived object needs check on new