Merge remote branch 'qt/master' into lighthouse-master

16 files changed, 303 insertions, 307 deletions

diff --git a/src/gui/painting/painting.pri b/src/gui/painting/painting.pri
index 92c4e84..ef66c6c 100644
--- a/src/gui/painting/painting.pri
+++ b/src/gui/painting/painting.pri
@@ -259,23 +259,8 @@ 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..054f96f 100644
--- a/src/gui/painting/qdrawhelper.cpp
+++ b/src/gui/painting/qdrawhelper.cpp
@@ -856,7 +856,7 @@ const uint * QT_FASTCALL fetchTransformedBilinear(uint *buffer, const Operator *
                 while (b < end) {
                     int x1 = (fx >> 16);
                     int x2;
-                    fetchTransformedBilinear_pixelBounds<blendType>(image_height, image_x1, image_x2, x1, x2);
+                    fetchTransformedBilinear_pixelBounds<blendType>(image_width, image_x1, image_x2, x1, x2);
                     uint tl = fetch(s1, x1, data->texture.colorTable);
                     uint tr = fetch(s1, x2, data->texture.colorTable);
                     uint bl = fetch(s2, x1, data->texture.colorTable);
@@ -883,7 +883,7 @@ const uint * QT_FASTCALL fetchTransformedBilinear(uint *buffer, const Operator *
                 while (b < end) {
                     int x1 = (fx >> 16);
                     int x2;
-                    fetchTransformedBilinear_pixelBounds<blendType>(image_height, image_x1, image_x2, x1, x2);
+                    fetchTransformedBilinear_pixelBounds<blendType>(image_width, image_x1, image_x2, x1, x2);
                     uint tl = fetch(s1, x1, data->texture.colorTable);
                     uint tr = fetch(s1, x2, data->texture.colorTable);
                     uint bl = fetch(s2, x1, data->texture.colorTable);
@@ -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/qoutlinemapper.cpp b/src/gui/painting/qoutlinemapper.cpp
index bf03545..72e5833 100644
--- a/src/gui/painting/qoutlinemapper.cpp
+++ b/src/gui/painting/qoutlinemapper.cpp
@@ -47,8 +47,6 @@
 
 QT_BEGIN_NAMESPACE
 
-static const qreal aliasedCoordinateDelta = 0.5 - 0.015625;
-
 #define qreal_to_fixed_26_6(f) (int(f * 64))
 
 
@@ -216,13 +214,6 @@ void QOutlineMapper::endOutline()
         elements = m_elements_dev.data();
     }
 
-    if (m_round_coords) {
-        // round coordinates to match outlines drawn with drawLine_midpoint_i
-        for (int i = 0; i < m_elements.size(); ++i)
-            elements[i] = QPointF(qFloor(elements[i].x() + aliasedCoordinateDelta),
-                                  qFloor(elements[i].y() + aliasedCoordinateDelta));
-    }
-
     controlPointRect = boundingRect(elements, element_count);
 
 #ifdef QT_DEBUG_CONVERT
diff --git a/src/gui/painting/qoutlinemapper_p.h b/src/gui/painting/qoutlinemapper_p.h
index d534f76..fcfc9bf 100644
--- a/src/gui/painting/qoutlinemapper_p.h
+++ b/src/gui/painting/qoutlinemapper_p.h
@@ -95,8 +95,7 @@ public:
         m_tags(0),
         m_contours(0),
         m_polygon_dev(0),
-        m_in_clip_elements(false),
-        m_round_coords(false)
+        m_in_clip_elements(false)
     {
     }
 
@@ -202,8 +201,6 @@ public:
     QT_FT_Outline *convertPath(const QPainterPath &path);
     QT_FT_Outline *convertPath(const QVectorPath &path);
 
-    void setCoordinateRounding(bool coordinateRounding) { m_round_coords = coordinateRounding; }
-
     inline QPainterPath::ElementType *elementTypes() const { return m_element_types.size() == 0 ? 0 : m_element_types.data(); }
 
 public:
@@ -237,9 +234,6 @@ public:
 
     bool m_valid;
     bool m_in_clip_elements;
-
-private:
-    bool m_round_coords;
 };
 
 QT_END_NAMESPACE
diff --git a/src/gui/painting/qpaintbuffer.cpp b/src/gui/painting/qpaintbuffer.cpp
index 3a4c94c..d4a8213 100644
--- a/src/gui/painting/qpaintbuffer.cpp
+++ b/src/gui/painting/qpaintbuffer.cpp
@@ -130,7 +130,7 @@ QPaintBufferPrivate::~QPaintBufferPrivate()
     for (int i = 0; i < commands.size(); ++i) {
         const QPaintBufferCommand &cmd = commands.at(i);
         if (cmd.id == QPaintBufferPrivate::Cmd_DrawTextItem)
-            delete reinterpret_cast<QTextItemIntCopy *>(qVariantValue<void *>(variants.at(cmd.offset)));
+            delete reinterpret_cast<QTextItemIntCopy *>(qvariant_cast<void *>(variants.at(cmd.offset)));
     }
 }
 
@@ -330,7 +330,7 @@ QString QPaintBuffer::commandDescription(int command) const
         break; }
 
     case QPaintBufferPrivate::Cmd_SetBrush: {
-        QBrush brush = qVariantValue<QBrush>(d_ptr->variants.at(cmd.offset));
+        QBrush brush = qvariant_cast<QBrush>(d_ptr->variants.at(cmd.offset));
         debug << "Cmd_SetBrush: " << brush;
         break; }
 
@@ -354,27 +354,27 @@ QString QPaintBuffer::commandDescription(int command) const
         break; }
 
     case QPaintBufferPrivate::Cmd_StrokeVectorPath: {
-        QPen pen = qVariantValue<QPen>(d_ptr->variants.at(cmd.extra));
+        QPen pen = qvariant_cast<QPen>(d_ptr->variants.at(cmd.extra));
         debug << "ExCmd_StrokeVectorPath: size: " << cmd.size
 //                 << ", hints:" << d->ints[cmd.offset2+cmd.size]
                  << "pts/elms:" << cmd.offset << cmd.offset2 << pen;
         break; }
 
     case QPaintBufferPrivate::Cmd_FillVectorPath: {
-        QBrush brush = qVariantValue<QBrush>(d_ptr->variants.at(cmd.extra));
+        QBrush brush = qvariant_cast<QBrush>(d_ptr->variants.at(cmd.extra));
         debug << "ExCmd_FillVectorPath: size: " << cmd.size
 //                 << ", hints:" << d->ints[cmd.offset2+cmd.size]
                  << "pts/elms:" << cmd.offset << cmd.offset2 << brush;
         break; }
 
     case QPaintBufferPrivate::Cmd_FillRectBrush: {
-        QBrush brush = qVariantValue<QBrush>(d_ptr->variants.at(cmd.extra));
+        QBrush brush = qvariant_cast<QBrush>(d_ptr->variants.at(cmd.extra));
         QRectF *rect = (QRectF *)(d_ptr->floats.constData() + cmd.offset);
         debug << "ExCmd_FillRectBrush, offset: " << cmd.offset << " rect: " << *rect << " brush: " << brush;
         break; }
 
     case QPaintBufferPrivate::Cmd_FillRectColor: {
-        QColor color = qVariantValue<QColor>(d_ptr->variants.at(cmd.extra));
+        QColor color = qvariant_cast<QColor>(d_ptr->variants.at(cmd.extra));
         QRectF *rect = (QRectF *)(d_ptr->floats.constData() + cmd.offset);
         debug << "ExCmd_FillRectBrush, offset: " << cmd.offset << " rect: " << *rect << " color: " << color;
         break; }
@@ -451,12 +451,12 @@ QString QPaintBuffer::commandDescription(int command) const
         break; }
 
     case QPaintBufferPrivate::Cmd_SetPen: {
-        QPen pen = qVariantValue<QPen>(d_ptr->variants.at(cmd.offset));
+        QPen pen = qvariant_cast<QPen>(d_ptr->variants.at(cmd.offset));
         debug << "Cmd_SetPen: " << pen;
         break; }
 
     case QPaintBufferPrivate::Cmd_SetTransform: {
-        QTransform xform = qVariantValue<QTransform>(d_ptr->variants.at(cmd.offset));
+        QTransform xform = qvariant_cast<QTransform>(d_ptr->variants.at(cmd.offset));
         debug << "Cmd_SetTransform, offset: " << cmd.offset << xform;
         break; }
 
@@ -532,7 +532,7 @@ QString QPaintBuffer::commandDescription(int command) const
 
     case QPaintBufferPrivate::Cmd_DrawTextItem: {
         QPointF pos(d_ptr->floats.at(cmd.extra), d_ptr->floats.at(cmd.extra+1));
-        QTextItemIntCopy *tiCopy = reinterpret_cast<QTextItemIntCopy *>(qVariantValue<void *>(d_ptr->variants.at(cmd.offset)));
+        QTextItemIntCopy *tiCopy = reinterpret_cast<QTextItemIntCopy *>(qvariant_cast<void *>(d_ptr->variants.at(cmd.offset)));
         QTextItemInt &ti = (*tiCopy)();
         QString text(ti.text());
 
@@ -1287,7 +1287,7 @@ void QPaintBufferEngine::drawTextItem(const QPointF &pos, const QTextItem &ti)
     qDebug() << "QPaintBufferEngine: drawTextItem: pos:" << pos << ti.text();
 #endif
     if (m_stream_raw_text_items) {
-        QPaintBufferCommand *cmd = buffer->addCommand(QPaintBufferPrivate::Cmd_DrawTextItem, qVariantFromValue<void *>(new QTextItemIntCopy(ti)));
+        QPaintBufferCommand *cmd = buffer->addCommand(QPaintBufferPrivate::Cmd_DrawTextItem, QVariant::fromValue<void *>(new QTextItemIntCopy(ti)));
 
         QFont font(ti.font());
         font.setUnderline(false);
@@ -1429,7 +1429,7 @@ void QPainterReplayer::process(const QPaintBufferCommand &cmd)
         break; }
 
     case QPaintBufferPrivate::Cmd_SetPen: {
-        QPen pen = qVariantValue<QPen>(d->variants.at(cmd.offset));
+        QPen pen = qvariant_cast<QPen>(d->variants.at(cmd.offset));
 #ifdef QPAINTBUFFER_DEBUG_DRAW
         qDebug() << " -> Cmd_SetPen: " << pen;
 #endif
@@ -1437,7 +1437,7 @@ void QPainterReplayer::process(const QPaintBufferCommand &cmd)
         break; }
 
     case QPaintBufferPrivate::Cmd_SetBrush: {
-        QBrush brush = qVariantValue<QBrush>(d->variants.at(cmd.offset));
+        QBrush brush = qvariant_cast<QBrush>(d->variants.at(cmd.offset));
 #ifdef QPAINTBUFFER_DEBUG_DRAW
         qDebug() << " -> Cmd_SetBrush: " << brush;
 #endif
@@ -1452,7 +1452,7 @@ void QPainterReplayer::process(const QPaintBufferCommand &cmd)
         break; }
 
     case QPaintBufferPrivate::Cmd_SetTransform: {
-        QTransform xform = qVariantValue<QTransform>(d->variants.at(cmd.offset));
+        QTransform xform = qvariant_cast<QTransform>(d->variants.at(cmd.offset));
 #ifdef QPAINTBUFFER_DEBUG_DRAW
         qDebug() << " -> Cmd_SetTransform, offset: " << cmd.offset << xform;
 #endif
@@ -1520,7 +1520,7 @@ void QPainterReplayer::process(const QPaintBufferCommand &cmd)
         break; }
 
     case QPaintBufferPrivate::Cmd_StrokeVectorPath: {
-        QPen pen = qVariantValue<QPen>(d->variants.at(cmd.extra));
+        QPen pen = qvariant_cast<QPen>(d->variants.at(cmd.extra));
 #ifdef QPAINTBUFFER_DEBUG_DRAW
         qDebug() << " -> Cmd_StrokeVectorPath: size: " << cmd.size
 //                 << ", hints:" << d->ints[cmd.offset2+cmd.size]
@@ -1531,7 +1531,7 @@ void QPainterReplayer::process(const QPaintBufferCommand &cmd)
         break; }
 
     case QPaintBufferPrivate::Cmd_FillVectorPath: {
-        QBrush brush = qVariantValue<QBrush>(d->variants.at(cmd.extra));
+        QBrush brush = qvariant_cast<QBrush>(d->variants.at(cmd.extra));
 #ifdef QPAINTBUFFER_DEBUG_DRAW
         qDebug() << " -> Cmd_FillVectorPath: size: " << cmd.size
 //                 << ", hints:" << d->ints[cmd.offset2+cmd.size]
@@ -1705,7 +1705,7 @@ void QPainterReplayer::process(const QPaintBufferCommand &cmd)
         break; }
 
     case QPaintBufferPrivate::Cmd_FillRectBrush: {
-        QBrush brush = qVariantValue<QBrush>(d->variants.at(cmd.extra));
+        QBrush brush = qvariant_cast<QBrush>(d->variants.at(cmd.extra));
         QRectF *rect = (QRectF *)(d->floats.constData() + cmd.offset);
 #ifdef QPAINTBUFFER_DEBUG_DRAW
         qDebug() << " -> Cmd_FillRectBrush, offset: " << cmd.offset << " rect: " << *rect << " brush: " << brush;
@@ -1714,7 +1714,7 @@ void QPainterReplayer::process(const QPaintBufferCommand &cmd)
         break; }
 
     case QPaintBufferPrivate::Cmd_FillRectColor: {
-        QColor color = qVariantValue<QColor>(d->variants.at(cmd.extra));
+        QColor color = qvariant_cast<QColor>(d->variants.at(cmd.extra));
         QRectF *rect = (QRectF *)(d->floats.constData() + cmd.offset);
 #ifdef QPAINTBUFFER_DEBUG_DRAW
         qDebug() << " -> Cmd_FillRectBrush, offset: " << cmd.offset << " rect: " << *rect << " color: " << color;
@@ -1790,7 +1790,7 @@ void QPainterReplayer::process(const QPaintBufferCommand &cmd)
 
     case QPaintBufferPrivate::Cmd_DrawTextItem: {
         QPointF pos(d->floats.at(cmd.extra), d->floats.at(cmd.extra+1));
-        QTextItemIntCopy *tiCopy = reinterpret_cast<QTextItemIntCopy *>(qVariantValue<void *>(d->variants.at(cmd.offset)));
+        QTextItemIntCopy *tiCopy = reinterpret_cast<QTextItemIntCopy *>(qvariant_cast<void *>(d->variants.at(cmd.offset)));
         QTextItemInt &ti = (*tiCopy)();
         QString text(ti.text());
 
@@ -1885,7 +1885,7 @@ void QPaintEngineExReplayer::process(const QPaintBufferCommand &cmd)
         break; }
 
     case QPaintBufferPrivate::Cmd_StrokeVectorPath: {
-        QPen pen = qVariantValue<QPen>(d->variants.at(cmd.extra));
+        QPen pen = qvariant_cast<QPen>(d->variants.at(cmd.extra));
 #ifdef QPAINTBUFFER_DEBUG_DRAW
         qDebug() << " -> ExCmd_StrokeVectorPath: size: " << cmd.size
 //                 << ", hints:" << d->ints[cmd.offset2+cmd.size]
@@ -1896,7 +1896,7 @@ void QPaintEngineExReplayer::process(const QPaintBufferCommand &cmd)
         break; }
 
     case QPaintBufferPrivate::Cmd_FillVectorPath: {
-        QBrush brush = qVariantValue<QBrush>(d->variants.at(cmd.extra));
+        QBrush brush = qvariant_cast<QBrush>(d->variants.at(cmd.extra));
 #ifdef QPAINTBUFFER_DEBUG_DRAW
         qDebug() << " -> ExCmd_FillVectorPath: size: " << cmd.size
 //                 << ", hints:" << d->ints[cmd.offset2+cmd.size]
@@ -1907,7 +1907,7 @@ void QPaintEngineExReplayer::process(const QPaintBufferCommand &cmd)
         break; }
 
     case QPaintBufferPrivate::Cmd_FillRectBrush: {
-        QBrush brush = qVariantValue<QBrush>(d->variants.at(cmd.extra));
+        QBrush brush = qvariant_cast<QBrush>(d->variants.at(cmd.extra));
         QRectF *rect = (QRectF *)(d->floats.constData() + cmd.offset);
 #ifdef QPAINTBUFFER_DEBUG_DRAW
         qDebug() << " -> ExCmd_FillRectBrush, offset: " << cmd.offset << " rect: " << *rect << " brush: " << brush;
@@ -1916,7 +1916,7 @@ void QPaintEngineExReplayer::process(const QPaintBufferCommand &cmd)
         break; }
 
     case QPaintBufferPrivate::Cmd_FillRectColor: {
-        QColor color = qVariantValue<QColor>(d->variants.at(cmd.extra));
+        QColor color = qvariant_cast<QColor>(d->variants.at(cmd.extra));
         QRectF *rect = (QRectF *)(d->floats.constData() + cmd.offset);
 #ifdef QPAINTBUFFER_DEBUG_DRAW
         qDebug() << " -> ExCmd_FillRectBrush, offset: " << cmd.offset << " rect: " << *rect << " color: " << color;
diff --git a/src/gui/painting/qpaintengine_raster.cpp b/src/gui/painting/qpaintengine_raster.cpp
index d9f7053..fbfac1a 100644
--- a/src/gui/painting/qpaintengine_raster.cpp
+++ b/src/gui/painting/qpaintengine_raster.cpp
@@ -125,9 +125,6 @@ void dumpClip(int width, int height, const QClipData *clip);
 // 4 pixels.
 #define int_dim(pos, dim) (int(pos+dim) - int(pos))
 
-// use the same rounding as in qrasterizer.cpp (6 bit fixed point)
-static const qreal aliasedCoordinateDelta = 0.5 - 0.015625;
-
 #ifdef Q_WS_WIN
 extern bool qt_cleartype_enabled;
 #endif
@@ -1755,10 +1752,10 @@ void QRasterPaintEngine::stroke(const QVectorPath &path, const QPen &pen)
 
 static inline QRect toNormalizedFillRect(const QRectF &rect)
 {
-    int x1 = qRound(rect.x() + aliasedCoordinateDelta);
-    int y1 = qRound(rect.y() + aliasedCoordinateDelta);
-    int x2 = qRound(rect.right() + aliasedCoordinateDelta);
-    int y2 = qRound(rect.bottom() + aliasedCoordinateDelta);
+    int x1 = qRound(rect.x());
+    int y1 = qRound(rect.y());
+    int x2 = qRound(rect.right());
+    int y2 = qRound(rect.bottom());
 
     if (x2 < x1)
         qSwap(x1, x2);
@@ -2027,7 +2024,6 @@ void QRasterPaintEngine::fillPolygon(const QPointF *points, int pointCount, Poly
 */
 void QRasterPaintEngine::drawPolygon(const QPointF *points, int pointCount, PolygonDrawMode mode)
 {
-    Q_D(QRasterPaintEngine);
     QRasterPaintEngineState *s = state();
 
 #ifdef QT_DEBUG_DRAW
@@ -2048,9 +2044,7 @@ void QRasterPaintEngine::drawPolygon(const QPointF *points, int pointCount, Poly
     if (mode != PolylineMode) {
         // Do the fill...
         if (s->brushData.blend) {
-            d->outlineMapper->setCoordinateRounding(s->penData.blend && s->flags.fast_pen && s->lastPen.brush().isOpaque());
             fillPolygon(points, pointCount, mode);
-            d->outlineMapper->setCoordinateRounding(false);
         }
     }
 
@@ -2102,7 +2096,6 @@ void QRasterPaintEngine::drawPolygon(const QPoint *points, int pointCount, Polyg
         if (s->brushData.blend) {
             // Compose polygon fill..,
             ensureOutlineMapper();
-            d->outlineMapper->setCoordinateRounding(s->penData.blend != 0);
             d->outlineMapper->beginOutline(mode == WindingMode ? Qt::WindingFill : Qt::OddEvenFill);
             d->outlineMapper->moveTo(*points);
             const QPoint *p = points;
@@ -2116,7 +2109,6 @@ void QRasterPaintEngine::drawPolygon(const QPoint *points, int pointCount, Polyg
             ProcessSpans brushBlend = d->getBrushFunc(d->outlineMapper->controlPointRect,
                                                       &s->brushData);
             d->rasterize(d->outlineMapper->outline(), brushBlend, &s->brushData, d->rasterBuffer.data());
-            d->outlineMapper->setCoordinateRounding(false);
         }
     }
 
@@ -2164,13 +2156,11 @@ void QRasterPaintEngine::strokePolygonCosmetic(const QPointF *points, int pointC
                                   : LineDrawNormal);
     int dashOffset = int(s->lastPen.dashOffset());
 
-    const QPointF offs(aliasedCoordinateDelta, aliasedCoordinateDelta);
-
     // Draw all the line segments.
     for (int i=1; i<pointCount; ++i) {
 
-        QPointF lp1 = points[i-1] * s->matrix + offs;
-        QPointF lp2 = points[i] * s->matrix + offs;
+        QPointF lp1 = points[i-1] * s->matrix;
+        QPointF lp2 = points[i] * s->matrix;
 
         const QRectF brect(lp1, lp2);
         ProcessSpans penBlend = d->getPenFunc(brect, &s->penData);
@@ -2192,8 +2182,8 @@ void QRasterPaintEngine::strokePolygonCosmetic(const QPointF *points, int pointC
 
     // Polygons are implicitly closed.
     if (needs_closing) {
-        QPointF lp1 = points[pointCount-1] * s->matrix + offs;
-        QPointF lp2 = points[0] * s->matrix + offs;
+        QPointF lp1 = points[pointCount-1] * s->matrix;
+        QPointF lp2 = points[0] * s->matrix;
 
         const QRectF brect(lp1, lp2);
         ProcessSpans penBlend = d->getPenFunc(brect, &s->penData);
@@ -2581,10 +2571,7 @@ void QRasterPaintEngine::drawImage(const QRectF &r, const QImage &img, const QRe
     int sr_b = qCeil(sr.bottom()) - 1;
 
     if (s->matrix.type() <= QTransform::TxScale && !s->flags.antialiased && sr_l == sr_r && sr_t == sr_b) {
-        // as fillRect will apply the aliased coordinate delta we need to
-        // subtract it here as we don't use it for image drawing
         QTransform old = s->matrix;
-        s->matrix = s->matrix * QTransform::fromTranslate(-aliasedCoordinateDelta, -aliasedCoordinateDelta);
 
         // Do whatever fillRect() does, but without premultiplying the color if it's already premultiplied.
         QRgb color = img.pixel(sr_l, sr_t);
@@ -2728,11 +2715,9 @@ void QRasterPaintEngine::drawImage(const QRectF &r, const QImage &img, const QRe
             d->initializeRasterizer(&d->image_filler_xform);
             d->rasterizer->setAntialiased(s->flags.antialiased);
 
-            const QPointF offs = s->flags.antialiased ? QPointF() : QPointF(aliasedCoordinateDelta, aliasedCoordinateDelta);
-
             const QRectF &rect = r.normalized();
-            const QPointF a = s->matrix.map((rect.topLeft() + rect.bottomLeft()) * 0.5f) - offs;
-            const QPointF b = s->matrix.map((rect.topRight() + rect.bottomRight()) * 0.5f) - offs;
+            const QPointF a = s->matrix.map((rect.topLeft() + rect.bottomLeft()) * 0.5f);
+            const QPointF b = s->matrix.map((rect.topRight() + rect.bottomRight()) * 0.5f);
 
             if (s->flags.tx_noshear)
                 d->rasterizer->rasterizeLine(a, b, rect.height() / rect.width());
@@ -2741,13 +2726,12 @@ void QRasterPaintEngine::drawImage(const QRectF &r, const QImage &img, const QRe
             return;
         }
 #endif
-        const qreal offs = s->flags.antialiased ? qreal(0) : aliasedCoordinateDelta;
         QPainterPath path;
         path.addRect(r);
         QTransform m = s->matrix;
         s->matrix = QTransform(m.m11(), m.m12(), m.m13(),
                                m.m21(), m.m22(), m.m23(),
-                               m.m31() - offs, m.m32() - offs, m.m33());
+                               m.m31(), m.m32(), m.m33());
         fillPath(path, &d->image_filler_xform);
         s->matrix = m;
     } else {
@@ -3116,13 +3100,11 @@ void QRasterPaintEngine::drawCachedGlyphs(int numGlyphs, const glyph_t *glyphs,
 
     int margin = cache->glyphMargin();
 
-    const QFixed offs = QFixed::fromReal(aliasedCoordinateDelta);
-
     const uchar *bits = image.bits();
     for (int i=0; i<numGlyphs; ++i) {
         const QTextureGlyphCache::Coord &c = cache->coords.value(glyphs[i]);
-        int x = qFloor(positions[i].x + offs) + c.baseLineX - margin;
-        int y = qFloor(positions[i].y + offs) - c.baseLineY - margin;
+        int x = qFloor(positions[i].x) + c.baseLineX - margin;
+        int y = qFloor(positions[i].y) - c.baseLineY - margin;
 
 //         printf("drawing [%d %d %d %d] baseline [%d %d], glyph: %d, to: %d %d, pos: %d %d\n",
 //                c.x, c.y,
@@ -3160,16 +3142,14 @@ void QRasterPaintEngine::drawGlyphsS60(const QPointF &p, const QTextItemInt &ti)
         fe->setFontScale(matrix.m11());
     ti.fontEngine->getGlyphPositions(ti.glyphs, matrix, ti.flags, glyphs, positions);
 
-    const QFixed aliasDelta = QFixed::fromReal(aliasedCoordinateDelta);
-
     for (int i=0; i<glyphs.size(); ++i) {
         TOpenFontCharMetrics tmetrics;
         const TUint8 *glyphBitmapBytes;
         TSize glyphBitmapSize;
         fe->getCharacterData(glyphs[i], tmetrics, glyphBitmapBytes, glyphBitmapSize);
         const glyph_metrics_t metrics = ti.fontEngine->boundingBox(glyphs[i]);
-        const int x = qFloor(positions[i].x + metrics.x + aliasDelta);
-        const int y = qFloor(positions[i].y + metrics.y + aliasDelta);
+        const int x = qFloor(positions[i].x + metrics.x);
+        const int y = qFloor(positions[i].y + metrics.y);
 
         alphaPenBlt(glyphBitmapBytes, glyphBitmapSize.iWidth, 8, x, y, glyphBitmapSize.iWidth, glyphBitmapSize.iHeight);
     }
@@ -3383,7 +3363,7 @@ void QRasterPaintEngine::drawTextItem(const QPointF &p, const QTextItem &textIte
 
 #if defined(Q_WS_QWS)
     if (fontEngine->type() == QFontEngine::Box) {
-        fontEngine->draw(this, qFloor(p.x() + aliasedCoordinateDelta), qFloor(p.y() + aliasedCoordinateDelta), ti);
+        fontEngine->draw(this, qFloor(p.x()), qFloor(p.y()), ti);
         return;
     }
 
@@ -3392,7 +3372,7 @@ void QRasterPaintEngine::drawTextItem(const QPointF &p, const QTextItem &textIte
             || (fontEngine->type() == QFontEngine::Proxy
                 && !(static_cast<QProxyFontEngine *>(fontEngine)->drawAsOutline()))
             )) {
-        fontEngine->draw(this, qFloor(p.x() + aliasedCoordinateDelta), qFloor(p.y() + aliasedCoordinateDelta), ti);
+        fontEngine->draw(this, qFloor(p.x()), qFloor(p.y()), ti);
         return;
     }
 #endif // Q_WS_QWS
@@ -3453,7 +3433,6 @@ void QRasterPaintEngine::drawTextItem(const QPointF &p, const QTextItem &textIte
         return;
     }
 
-    QFixed offs = QFixed::fromReal(aliasedCoordinateDelta);
     FT_Face lockedFace = 0;
 
     int depth;
@@ -3501,8 +3480,8 @@ void QRasterPaintEngine::drawTextItem(const QPointF &p, const QTextItem &textIte
         };
 
         alphaPenBlt(glyph->data, pitch, depth,
-                    qFloor(positions[i].x + offs) + glyph->x,
-                    qFloor(positions[i].y + offs) - glyph->y,
+                    qFloor(positions[i].x) + glyph->x,
+                    qFloor(positions[i].y) - glyph->y,
                     glyph->width, glyph->height);
     }
     if (lockedFace)
@@ -3639,8 +3618,8 @@ void QRasterPaintEngine::drawLines(const QLine *lines, int lineCount)
 
         int m11 = int(s->matrix.m11());
         int m22 = int(s->matrix.m22());
-        int dx = qFloor(s->matrix.dx() + aliasedCoordinateDelta);
-        int dy = qFloor(s->matrix.dy() + aliasedCoordinateDelta);
+        int dx = qFloor(s->matrix.dx());
+        int dy = qFloor(s->matrix.dy());
         for (int i=0; i<lineCount; ++i) {
             int dashOffset = int(s->lastPen.dashOffset());
             if (s->flags.int_xform) {
@@ -3744,7 +3723,7 @@ void QRasterPaintEngine::drawLines(const QLineF *lines, int lineCount)
 
         for (int i=0; i<lineCount; ++i) {
             int dashOffset = int(s->lastPen.dashOffset());
-            QLineF line = (lines[i] * s->matrix).translated(aliasedCoordinateDelta, aliasedCoordinateDelta);
+            QLineF line = lines[i] * s->matrix;
             const QRectF brect(QPointF(line.x1(), line.y1()),
                                QPointF(line.x2(), line.y2()));
             ProcessSpans penBlend = d->getPenFunc(brect, &s->penData);
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 f24eafd..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)
 {
@@ -2702,6 +2707,61 @@ QPainterPath QPainter::clipPath() const
 }
 
 /*!
+    Returns the bounding rectangle of the current clip if there is a clip;
+    otherwise returns an empty rectangle. Note that the clip region is
+    given in logical coordinates.
+
+    The bounding rectangle is not guaranteed to be tight.
+
+    \sa setClipRect(), setClipPath(), setClipRegion()
+
+    \since 4.8
+ */
+
+QRectF QPainter::clipBoundingRect() const
+{
+    Q_D(const QPainter);
+
+    if (!d->engine) {
+        qWarning("QPainter::clipBoundingRect: Painter not active");
+        return QRectF();
+    }
+
+    // Accumulate the bounding box in device space. This is not 100%
+    // precise, but it fits within the guarantee and it is resonably
+    // fast.
+    QRectF bounds;
+    for (int i=0; i<d->state->clipInfo.size(); ++i) {
+         QRectF r;
+         const QPainterClipInfo &info = d->state->clipInfo.at(i);
+
+         if (info.clipType == QPainterClipInfo::RectClip)
+             r = info.rect;
+         else if (info.clipType == QPainterClipInfo::RegionClip)
+             r = info.region.boundingRect();
+         else
+             r = info.path.boundingRect();
+
+         r = info.matrix.mapRect(r);
+
+         if (i == 0)
+             bounds = r;
+         else if (info.operation == Qt::IntersectClip)
+             bounds &= r;
+         else if (info.operation == Qt::UniteClip)
+             bounds |= r;
+    }
+
+
+    // Map the rectangle back into logical space using the inverse
+    // matrix.
+    if (!d->txinv)
+        const_cast<QPainter *>(this)->d_ptr->updateInvMatrix();
+
+    return d->invMatrix.mapRect(bounds);
+}
+
+/*!
     \fn void QPainter::setClipRect(const QRectF &rectangle, Qt::ClipOperation operation)
 
     Enables clipping, and sets the clip region to the given \a
@@ -5996,6 +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);
@@ -6363,9 +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
@@ -6439,6 +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/qpainter.h b/src/gui/painting/qpainter.h
index 85751a9..96305e3 100644
--- a/src/gui/painting/qpainter.h
+++ b/src/gui/painting/qpainter.h
@@ -222,6 +222,8 @@ public:
     void setClipping(bool enable);
     bool hasClipping() const;
 
+    QRectF clipBoundingRect() const;
+
     void save();
     void restore();
 
diff --git a/src/gui/painting/qrasterizer.cpp b/src/gui/painting/qrasterizer.cpp
index f8f8afb..c92d8d5 100644
--- a/src/gui/painting/qrasterizer.cpp
+++ b/src/gui/painting/qrasterizer.cpp
@@ -62,8 +62,8 @@ typedef int Q16Dot16;
 
 #define SPAN_BUFFER_SIZE 256
 
-#define COORD_ROUNDING 1 // 0: round up, 1: round down
-#define COORD_OFFSET 32 // 26.6, 32 is half a pixel
+#define COORD_ROUNDING 0 // 0: round up, 1: round down
+#define COORD_OFFSET 0 // 26.6, 32 is half a pixel
 
 class QSpanBuffer {
 public:
@@ -718,7 +718,7 @@ void QRasterizer::rasterizeLine(const QPointF &a, const QPointF &b, qreal width,
     QPointF pa = a;
     QPointF pb = b;
 
-    QPointF offs = QPointF(qAbs(b.y() - a.y()), qAbs(b.x() - a.x())) * width * 0.5;    
+    QPointF offs = QPointF(qAbs(b.y() - a.y()), qAbs(b.x() - a.x())) * width * 0.5;
     if (squareCap)
         offs += QPointF(offs.y(), offs.x());
     const QRectF clip(d->clipRect.topLeft() - offs, d->clipRect.bottomRight() + QPoint(1, 1) + offs);
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