Merge remote-tracking branch 'origin/5.15' into dev

Change-Id: Ic0dbddfa711905bc8e01aa6cbbdabf056a19587f

23 files changed, 260 insertions, 163 deletions

diff --git a/src/corelib/io/qfilesystemwatcher.cpp b/src/corelib/io/qfilesystemwatcher.cpp
index a4705136a2..54460aff77 100644
--- a/src/corelib/io/qfilesystemwatcher.cpp
+++ b/src/corelib/io/qfilesystemwatcher.cpp
@@ -451,6 +451,12 @@ QStringList QFileSystemWatcher::removePaths(const QStringList &paths)
     This signal is emitted when the file at the specified \a path is
     modified, renamed or removed from disk.
 
+    \note As a safety measure, many applications save an open file by
+    writing a new file and then deleting the old one. In your slot
+    function, you can check \c watcher.files().contains(path).
+    If it returns \c false, check whether the file still exists
+    and then call \c addPath() to continue watching it.
+
     \sa directoryChanged()
 */
 
diff --git a/src/corelib/kernel/qcoreapplication.cpp b/src/corelib/kernel/qcoreapplication.cpp
index a66dbc1b29..6531cd8e0c 100644
--- a/src/corelib/kernel/qcoreapplication.cpp
+++ b/src/corelib/kernel/qcoreapplication.cpp
@@ -2708,18 +2708,22 @@ QStringList QCoreApplication::libraryPathsLocked()
         QStringList *app_libpaths = new QStringList;
         coreappdata()->app_libpaths.reset(app_libpaths);
 
-        QString libPathEnv = qEnvironmentVariable("QT_PLUGIN_PATH");
-        if (!libPathEnv.isEmpty()) {
-            QStringList paths = libPathEnv.split(QDir::listSeparator(), QString::SkipEmptyParts);
-            for (QStringList::const_iterator it = paths.constBegin(); it != paths.constEnd(); ++it) {
-                QString canonicalPath = QDir(*it).canonicalPath();
-                if (!canonicalPath.isEmpty()
-                    && !app_libpaths->contains(canonicalPath)) {
-                    app_libpaths->append(canonicalPath);
+        auto setPathsFromEnv = [&](QString libPathEnv) {
+            if (!libPathEnv.isEmpty()) {
+                QStringList paths = libPathEnv.split(QDir::listSeparator(), QString::SkipEmptyParts);
+                for (QStringList::const_iterator it = paths.constBegin(); it != paths.constEnd(); ++it) {
+                    QString canonicalPath = QDir(*it).canonicalPath();
+                    if (!canonicalPath.isEmpty()
+                        && !app_libpaths->contains(canonicalPath)) {
+                        app_libpaths->append(canonicalPath);
+                    }
                 }
             }
-        }
-
+        };
+        setPathsFromEnv(qEnvironmentVariable("QT_PLUGIN_PATH"));
+#ifdef Q_OS_ANDROID
+        setPathsFromEnv(qEnvironmentVariable("QT_BUNDLED_LIBS_PATH"));
+#endif
 #ifdef Q_OS_DARWIN
         // Check the main bundle's PlugIns directory as this is a standard location for Apple OSes.
         // Note that the QLibraryInfo::PluginsPath below will coincidentally be the same as this value
diff --git a/src/corelib/kernel/qobject.cpp b/src/corelib/kernel/qobject.cpp
index 3acee20498..003c8a8643 100644
--- a/src/corelib/kernel/qobject.cpp
+++ b/src/corelib/kernel/qobject.cpp
@@ -3904,11 +3904,12 @@ void doActivate(QObject *sender, int signal_index, void **argv)
         if (connections->currentConnectionId.loadRelaxed() == 0)
             senderDeleted = true;
     }
-    if (!senderDeleted)
+    if (!senderDeleted) {
         sp->connections.loadRelaxed()->cleanOrphanedConnections(sender);
 
-    if (callbacks_enabled && signal_spy_set->signal_end_callback != nullptr)
-        signal_spy_set->signal_end_callback(sender, signal_index);
+        if (callbacks_enabled && signal_spy_set->signal_end_callback != nullptr)
+            signal_spy_set->signal_end_callback(sender, signal_index);
+    }
 }
 
 /*!
@@ -4343,22 +4344,18 @@ QDebug operator<<(QDebug dbg, const QObject *o)
     \relates QObject
     \obsolete
 
+    In new code, you should prefer the use of the Q_ENUM() macro, which makes the
+    type available also to the meta type system.
+    For instance, QMetaEnum::fromType() will not work with types declared with Q_ENUMS().
+
     This macro registers one or several enum types to the meta-object
     system.
 
-    For example:
-
-    \snippet code/src_corelib_kernel_qobject.cpp 38
-
     If you want to register an enum that is declared in another class,
     the enum must be fully qualified with the name of the class
     defining it. In addition, the class \e defining the enum has to
     inherit QObject as well as declare the enum using Q_ENUMS().
 
-    In new code, you should prefer the use of the Q_ENUM() macro, which makes the
-    type available also to the meta type system.
-    For instance, QMetaEnum::fromType() will not work with types declared with Q_ENUMS().
-
     \sa {Qt's Property System}
 */
 
diff --git a/src/corelib/plugin/qfactoryloader.cpp b/src/corelib/plugin/qfactoryloader.cpp
index 6737aeccd2..79315ae50f 100644
--- a/src/corelib/plugin/qfactoryloader.cpp
+++ b/src/corelib/plugin/qfactoryloader.cpp
@@ -193,7 +193,11 @@ void QFactoryLoader::update()
             continue;
         d->loadedPaths << pluginDir;
 
+#ifdef Q_OS_ANDROID
+        QString path = pluginDir;
+#else
         QString path = pluginDir + d->suffix;
+#endif
 
         if (qt_debug_component())
             qDebug() << "QFactoryLoader::QFactoryLoader() checking directory path" << path << "...";
@@ -202,8 +206,10 @@ void QFactoryLoader::update()
             continue;
 
         QStringList plugins = QDir(path).entryList(
-#ifdef Q_OS_WIN
+#if defined(Q_OS_WIN)
                     QStringList(QStringLiteral("*.dll")),
+#elif defined(Q_OS_ANDROID)
+                    QStringList(QLatin1String("plugins_%1_*.so").arg(d->suffix)),
 #endif
                     QDir::Files);
         QLibraryPrivate *library = 0;
@@ -339,6 +345,10 @@ QFactoryLoader::QFactoryLoader(const char *iid,
 #if QT_CONFIG(library)
     d->cs = cs;
     d->suffix = suffix;
+# ifdef Q_OS_ANDROID
+    if (!d->suffix.isEmpty() && d->suffix.at(0) == QLatin1Char('/'))
+        d->suffix.remove(0, 1);
+# endif
 
     QMutexLocker locker(qt_factoryloader_mutex());
     update();
diff --git a/src/corelib/plugin/qlibrary_unix.cpp b/src/corelib/plugin/qlibrary_unix.cpp
index 44d5513163..f0de1010d7 100644
--- a/src/corelib/plugin/qlibrary_unix.cpp
+++ b/src/corelib/plugin/qlibrary_unix.cpp
@@ -236,6 +236,14 @@ bool QLibraryPrivate::load_sys()
                 auto attemptFromBundle = attempt;
                 pHnd = dlopen(QFile::encodeName(attemptFromBundle.replace(QLatin1Char('/'), QLatin1Char('_'))), dlFlags);
             }
+            if (pHnd) {
+                using JniOnLoadPtr = jint (*)(JavaVM *vm, void *reserved);
+                JniOnLoadPtr jniOnLoad = reinterpret_cast<JniOnLoadPtr>(dlsym(pHnd, "JNI_OnLoad"));
+                if (jniOnLoad && jniOnLoad(QtAndroidPrivate::javaVM(), nullptr) == JNI_ERR) {
+                    dlclose(pHnd);
+                    pHnd = nullptr;
+                }
+            }
 #endif
 
             if (!pHnd && fileName.startsWith(QLatin1Char('/')) && QFile::exists(attempt)) {
diff --git a/src/corelib/plugin/qpluginloader.cpp b/src/corelib/plugin/qpluginloader.cpp
index 4e0c3a511b..cadff4f32b 100644
--- a/src/corelib/plugin/qpluginloader.cpp
+++ b/src/corelib/plugin/qpluginloader.cpp
@@ -311,6 +311,16 @@ static QString locatePlugin(const QString& fileName)
     for (const QString &path : qAsConst(paths)) {
         for (const QString &prefix : qAsConst(prefixes)) {
             for (const QString &suffix : qAsConst(suffixes)) {
+#ifdef Q_OS_ANDROID
+                {
+                    QString pluginPath = basePath + prefix + baseName + suffix;
+                    const QString fn = path + QLatin1String("/lib") + pluginPath.replace(QLatin1Char('/'), QLatin1Char('_'));
+                    if (debug)
+                        qDebug() << "Trying..." << fn;
+                    if (QFileInfo(fn).isFile())
+                        return fn;
+                }
+#endif
                 const QString fn = path + QLatin1Char('/') + basePath + prefix + baseName + suffix;
                 if (debug)
                     qDebug() << "Trying..." << fn;
diff --git a/src/gui/kernel/qevent.h b/src/gui/kernel/qevent.h
index e80920686f..b463b5b431 100644
--- a/src/gui/kernel/qevent.h
+++ b/src/gui/kernel/qevent.h
@@ -961,6 +961,7 @@ public:
         friend class QApplication;
         friend class QApplicationPrivate;
         friend class QQuickPointerTouchEvent;
+        friend class QQuickMultiPointTouchArea;
     };
 
 #if QT_DEPRECATED_SINCE(5, 0)
diff --git a/src/gui/painting/qdrawhelper.cpp b/src/gui/painting/qdrawhelper.cpp
index edb363ac69..e5f752b94e 100644
--- a/src/gui/painting/qdrawhelper.cpp
+++ b/src/gui/painting/qdrawhelper.cpp
@@ -5658,44 +5658,63 @@ static inline void alphamapblend_argb32(quint32 *dst, int coverage, QRgba64 srcL
 {
     if (coverage == 0) {
         // nothing
-    } else if (coverage == 255) {
-        *dst = src;
-    } else if (!colorProfile) {
-        *dst = INTERPOLATE_PIXEL_255(src, coverage, *dst, 255 - coverage);
+    } else if (coverage == 255 || !colorProfile) {
+        blend_pixel(*dst, src, coverage);
+    } else if (*dst < 0xff000000) {
+        // Give up and do a naive gray alphablend. Needed to deal with ARGB32 and invalid ARGB32_premultiplied, see QTBUG-60571
+        blend_pixel(*dst, src, coverage);
+    } else if (src >= 0xff000000) {
+        grayBlendPixel(dst, coverage, srcLinear, colorProfile);
     } else {
-        if (*dst >= 0xff000000) {
-            grayBlendPixel(dst, coverage, srcLinear, colorProfile);
-        } else {
-            // Give up and do a naive gray alphablend. Needed to deal with ARGB32 and invalid ARGB32_premultiplied, see QTBUG-60571
-            *dst = INTERPOLATE_PIXEL_255(src, coverage, *dst, 255 - coverage);
-        }
+        // First do naive blend with text-color
+        QRgb s = *dst;
+        blend_pixel(s, src);
+        // Then gamma-corrected blend with glyph shape
+        QRgba64 s64 = colorProfile ? colorProfile->toLinear64(s) : QRgba64::fromArgb32(s);
+        grayBlendPixel(dst, coverage, s64, colorProfile);
     }
 }
 
 #if QT_CONFIG(raster_64bit)
+
+static inline void grayBlendPixel(QRgba64 &dst, int coverage, QRgba64 srcLinear, const QColorTrcLut *colorProfile)
+{
+    // Do a gammacorrected gray alphablend...
+    QRgba64 dstColor = dst;
+    if (colorProfile) {
+        if (dstColor.isOpaque())
+            dstColor = colorProfile->toLinear(dstColor);
+        else if (!dstColor.isTransparent())
+            dstColor = colorProfile->toLinear(dstColor.unpremultiplied()).premultiplied();
+    }
+
+    blend_pixel(dstColor, srcLinear, coverage);
+
+    if (colorProfile) {
+        if (dstColor.isOpaque())
+            dstColor = colorProfile->fromLinear(dstColor);
+        else if (!dstColor.isTransparent())
+            dstColor = colorProfile->fromLinear(dstColor.unpremultiplied()).premultiplied();
+    }
+    dst = dstColor;
+}
+
 static inline void alphamapblend_generic(int coverage, QRgba64 *dest, int x, const QRgba64 &srcLinear, const QRgba64 &src, const QColorTrcLut *colorProfile)
 {
     if (coverage == 0) {
         // nothing
     } else if (coverage == 255) {
-        dest[x] = src;
+        blend_pixel(dest[x], src);
+    } else if (src.isOpaque()) {
+        grayBlendPixel(dest[x], coverage, srcLinear, colorProfile);
     } else {
-        QRgba64 dstColor = dest[x];
-        if (colorProfile) {
-            if (dstColor.isOpaque())
-                dstColor = colorProfile->toLinear(dstColor);
-            else if (!dstColor.isTransparent())
-                dstColor = colorProfile->toLinear(dstColor.unpremultiplied()).premultiplied();
-        }
-
-        dstColor = interpolate255(srcLinear, coverage, dstColor, 255 - coverage);
-        if (colorProfile) {
-            if (dstColor.isOpaque())
-                dstColor = colorProfile->fromLinear(dstColor);
-            else if (!dstColor.isTransparent())
-                dstColor = colorProfile->fromLinear(dstColor.unpremultiplied()).premultiplied();
-        }
-        dest[x] = dstColor;
+        // First do naive blend with text-color
+        QRgba64 s = dest[x];
+        blend_pixel(s, src);
+        // Then gamma-corrected blend with glyph shape
+        if (colorProfile)
+            s = colorProfile->toLinear(s);
+        grayBlendPixel(dest[x], coverage, s, colorProfile);
     }
 }
 
@@ -5714,12 +5733,8 @@ static void qt_alphamapblit_generic(QRasterBuffer *rasterBuffer,
         colorProfile = QGuiApplicationPrivate::instance()->colorProfileForA8Text();
 
     QRgba64 srcColor = color;
-    if (colorProfile) {
-        if (color.isOpaque())
-            srcColor = colorProfile->toLinear(srcColor);
-        else
-            srcColor = colorProfile->toLinear(srcColor.unpremultiplied()).premultiplied();
-    }
+    if (colorProfile && color.isOpaque())
+        srcColor = colorProfile->toLinear(srcColor);
 
     alignas(8) QRgba64 buffer[BufferSize];
     const DestFetchProc64 destFetch64 = destFetchProc64[rasterBuffer->format];
@@ -5792,12 +5807,8 @@ static void qt_alphamapblit_generic(QRasterBuffer *rasterBuffer,
         colorProfile = QGuiApplicationPrivate::instance()->colorProfileForA8Text();
 
     QRgba64 srcColor = color;
-    if (colorProfile) {
-        if (color.isOpaque())
-            srcColor = colorProfile->toLinear(srcColor);
-        else
-            srcColor = colorProfile->toLinear(srcColor.unpremultiplied()).premultiplied();
-    }
+    if (colorProfile && color.isOpaque())
+        srcColor = colorProfile->toLinear(srcColor);
 
     quint32 buffer[BufferSize];
     const DestFetchProc destFetch = destFetchProc[rasterBuffer->format];
@@ -5872,7 +5883,7 @@ void qt_alphamapblit_quint16(QRasterBuffer *rasterBuffer,
                              int mapWidth, int mapHeight, int mapStride,
                              const QClipData *clip, bool useGammaCorrection)
 {
-    if (useGammaCorrection) {
+    if (useGammaCorrection || !color.isOpaque()) {
         qt_alphamapblit_generic(rasterBuffer, x, y, color, map, mapWidth, mapHeight, mapStride, clip, useGammaCorrection);
         return;
     }
@@ -5931,12 +5942,8 @@ static void qt_alphamapblit_argb32(QRasterBuffer *rasterBuffer,
         colorProfile = QGuiApplicationPrivate::instance()->colorProfileForA8Text();
 
     QRgba64 srcColor = color;
-    if (colorProfile) {
-        if (color.isOpaque())
-            srcColor = colorProfile->toLinear(srcColor);
-        else
-            srcColor = colorProfile->toLinear(srcColor.unpremultiplied()).premultiplied();
-    }
+    if (colorProfile && color.isOpaque())
+        srcColor = colorProfile->toLinear(srcColor);
 
     if (!clip) {
         quint32 *dest = reinterpret_cast<quint32*>(rasterBuffer->scanLine(y)) + x;
@@ -6031,48 +6038,62 @@ static inline QRgb rgbBlend(QRgb d, QRgb s, uint rgbAlpha)
 #endif
 }
 
-#if QT_CONFIG(raster_64bit)
-static inline void alphargbblend_generic(uint coverage, QRgba64 *dest, int x, const QRgba64 &srcLinear, const QRgba64 &src, const QColorTrcLut *colorProfile)
+static inline void alphargbblend_argb32(quint32 *dst, uint coverage, const QRgba64 &srcLinear, quint32 src, const QColorTrcLut *colorProfile)
 {
     if (coverage == 0xff000000) {
         // nothing
-    } else if (coverage == 0xffffffff) {
-        dest[x] = src;
+    } else if (coverage == 0xffffffff && qAlpha(src) == 255) {
+        blend_pixel(*dst, src);
+    } else if (!colorProfile) {
+        *dst = rgbBlend(*dst, src, coverage);
+    } else if (*dst < 0xff000000) {
+        // Give up and do a naive gray alphablend. Needed to deal with ARGB32 and invalid ARGB32_premultiplied, see QTBUG-60571
+        blend_pixel(*dst, src, qRgbAvg(coverage));
+    } else if (srcLinear.isOpaque()) {
+        rgbBlendPixel(dst, coverage, srcLinear, colorProfile);
     } else {
-        QRgba64 dstColor = dest[x];
-        if (dstColor.isOpaque()) {
-            if (colorProfile)
-                dstColor = colorProfile->toLinear(dstColor);
-            dstColor = rgbBlend(dstColor, srcLinear, coverage);
-            if (colorProfile)
-                dstColor = colorProfile->fromLinear(dstColor);
-            dest[x] = dstColor;
-        } else {
-            // Do a gray alphablend.
-            alphamapblend_generic(qRgbAvg(coverage), dest, x, srcLinear, src, colorProfile);
-        }
+        // First do naive blend with text-color
+        QRgb s = *dst;
+        blend_pixel(s, src);
+        // Then gamma-corrected blend with glyph shape
+        QRgba64 s64 = colorProfile ? colorProfile->toLinear64(s) : QRgba64::fromArgb32(s);
+        rgbBlendPixel(dst, coverage, s64, colorProfile);
     }
 }
-#endif
 
-static inline void alphargbblend_argb32(quint32 *dst, uint coverage, const QRgba64 &srcLinear, quint32 src, const QColorTrcLut *colorProfile)
+#if QT_CONFIG(raster_64bit)
+static inline void rgbBlendPixel(QRgba64 &dst, int coverage, QRgba64 slinear, const QColorTrcLut *colorProfile)
+{
+    // Do a gammacorrected RGB alphablend...
+    const QRgba64 dlinear = colorProfile ? colorProfile->toLinear64(dst) : dst;
+
+    QRgba64 blend = rgbBlend(dlinear, slinear, coverage);
+
+    dst = colorProfile ? colorProfile->fromLinear(blend) : blend;
+}
+
+static inline void alphargbblend_generic(uint coverage, QRgba64 *dest, int x, const QRgba64 &srcLinear, const QRgba64 &src, const QColorTrcLut *colorProfile)
 {
     if (coverage == 0xff000000) {
         // nothing
     } else if (coverage == 0xffffffff) {
-        *dst = src;
-    } else if (*dst < 0xff000000) {
-        // Give up and do a naive gray alphablend. Needed to deal with ARGB32 and invalid ARGB32_premultiplied, see QTBUG-60571
-        const int a = qRgbAvg(coverage);
-        *dst = INTERPOLATE_PIXEL_255(src, a, *dst, 255 - a);
-    } else if (!colorProfile) {
-        *dst = rgbBlend(*dst, src, coverage);
-    } else  {
-        rgbBlendPixel(dst, coverage, srcLinear, colorProfile);
+        blend_pixel(dest[x], src);
+    } else if (!dest[x].isOpaque()) {
+        // Do a gray alphablend.
+        alphamapblend_generic(qRgbAvg(coverage), dest, x, srcLinear, src, colorProfile);
+    } else if (src.isOpaque()) {
+        rgbBlendPixel(dest[x], coverage, srcLinear, colorProfile);
+    } else {
+        // First do naive blend with text-color
+        QRgba64 s = dest[x];
+        blend_pixel(s, src);
+        // Then gamma-corrected blend with glyph shape
+        if (colorProfile)
+            s = colorProfile->toLinear(s);
+        rgbBlendPixel(dest[x], coverage, s, colorProfile);
     }
 }
 
-#if QT_CONFIG(raster_64bit)
 static void qt_alphargbblit_generic(QRasterBuffer *rasterBuffer,
                                     int x, int y, const QRgba64 &color,
                                     const uint *src, int mapWidth, int mapHeight, int srcStride,
@@ -6087,12 +6108,8 @@ static void qt_alphargbblit_generic(QRasterBuffer *rasterBuffer,
         colorProfile = QGuiApplicationPrivate::instance()->colorProfileForA32Text();
 
     QRgba64 srcColor = color;
-    if (colorProfile) {
-        if (color.isOpaque())
-            srcColor = colorProfile->toLinear(srcColor);
-        else
-            srcColor = colorProfile->toLinear(srcColor.unpremultiplied()).premultiplied();
-    }
+    if (colorProfile && color.isOpaque())
+        srcColor = colorProfile->toLinear(srcColor);
 
     alignas(8) QRgba64 buffer[BufferSize];
     const DestFetchProc64 destFetch64 = destFetchProc64[rasterBuffer->format];
@@ -6164,12 +6181,8 @@ static void qt_alphargbblit_generic(QRasterBuffer *rasterBuffer,
         colorProfile = QGuiApplicationPrivate::instance()->colorProfileForA32Text();
 
     QRgba64 srcColor = color;
-    if (colorProfile) {
-        if (color.isOpaque())
-            srcColor = colorProfile->toLinear(srcColor);
-        else
-            srcColor = colorProfile->toLinear(srcColor.unpremultiplied()).premultiplied();
-    }
+    if (colorProfile && color.isOpaque())
+        srcColor = colorProfile->toLinear(srcColor);
 
     quint32 buffer[BufferSize];
     const DestFetchProc destFetch = destFetchProc[rasterBuffer->format];
@@ -6242,12 +6255,8 @@ static void qt_alphargbblit_argb32(QRasterBuffer *rasterBuffer,
         colorProfile = QGuiApplicationPrivate::instance()->colorProfileForA32Text();
 
     QRgba64 srcColor = color;
-    if (colorProfile) {
-        if (color.isOpaque())
-            srcColor = colorProfile->toLinear(srcColor);
-        else
-            srcColor = colorProfile->toLinear(srcColor.unpremultiplied()).premultiplied();
-    }
+    if (colorProfile && color.isOpaque())
+        srcColor = colorProfile->toLinear(srcColor);
 
     if (!clip) {
         quint32 *dst = reinterpret_cast<quint32*>(rasterBuffer->scanLine(y)) + x;
diff --git a/src/gui/painting/qdrawhelper_p.h b/src/gui/painting/qdrawhelper_p.h
index 9c5d525722..dd42b96d79 100644
--- a/src/gui/painting/qdrawhelper_p.h
+++ b/src/gui/painting/qdrawhelper_p.h
@@ -671,6 +671,8 @@ static Q_ALWAYS_INLINE void blend_pixel(quint32 &dst, const quint32 src)
 
 static Q_ALWAYS_INLINE void blend_pixel(quint32 &dst, const quint32 src, const int const_alpha)
 {
+    if (const_alpha == 255)
+        return blend_pixel(dst, src);
     if (src != 0) {
         const quint32 s = BYTE_MUL(src, const_alpha);
         dst = s + BYTE_MUL(dst, qAlpha(~s));
diff --git a/src/gui/painting/qpaintengine_raster.cpp b/src/gui/painting/qpaintengine_raster.cpp
index 9894da8fe1..447ecb358a 100644
--- a/src/gui/painting/qpaintengine_raster.cpp
+++ b/src/gui/painting/qpaintengine_raster.cpp
@@ -842,8 +842,8 @@ void QRasterPaintEngine::updateRasterState()
         const QPainter::CompositionMode mode = s->composition_mode;
         s->flags.fast_text = (s->penData.type == QSpanData::Solid)
                        && s->intOpacity == 256
-                       && (mode == QPainter::CompositionMode_Source
-                           || (mode == QPainter::CompositionMode_SourceOver
+                       && (mode == QPainter::CompositionMode_SourceOver
+                           || (mode == QPainter::CompositionMode_Source
                                && s->penData.solidColor.isOpaque()));
     }
 
diff --git a/src/gui/painting/qpainter.cpp b/src/gui/painting/qpainter.cpp
index 84b34e390b..3ce54c20be 100644
--- a/src/gui/painting/qpainter.cpp
+++ b/src/gui/painting/qpainter.cpp
@@ -1716,8 +1716,8 @@ void QPainter::restore()
 
 static inline void qt_cleanup_painter_state(QPainterPrivate *d)
 {
+    qDeleteAll(d->states);
     d->states.clear();
-    delete d->state;
     d->state = 0;
     d->engine = 0;
     d->device = 0;
diff --git a/src/gui/painting/qrgba64_p.h b/src/gui/painting/qrgba64_p.h
index ca879de27c..d145dbfbea 100644
--- a/src/gui/painting/qrgba64_p.h
+++ b/src/gui/painting/qrgba64_p.h
@@ -284,6 +284,8 @@ static Q_ALWAYS_INLINE void blend_pixel(QRgba64 &dst, QRgba64 src)
 
 static Q_ALWAYS_INLINE void blend_pixel(QRgba64 &dst, QRgba64 src, const int const_alpha)
 {
+    if (const_alpha == 255)
+        return blend_pixel(dst, src);
     if (!src.isTransparent()) {
         src = multiplyAlpha255(src, const_alpha);
         dst = src + multiplyAlpha65535(dst, 65535 - src.alpha());
diff --git a/src/gui/rhi/qrhimetal.mm b/src/gui/rhi/qrhimetal.mm
index 0b1ab72c2c..bfd6944cdb 100644
--- a/src/gui/rhi/qrhimetal.mm
+++ b/src/gui/rhi/qrhimetal.mm
@@ -3524,7 +3524,10 @@ QSize QMetalSwapChain::surfacePixelSize()
     if (v) {
         CAMetalLayer *layer = (CAMetalLayer *) [v layer];
         if (layer) {
-            CGSize size = [layer drawableSize];
+            CGSize size = layer.bounds.size;
+            size.width *= layer.contentsScale;
+            size.height *= layer.contentsScale;
+            layer.drawableSize = size;
             return QSize(int(size.width), int(size.height));
         }
     }
diff --git a/src/plugins/platforms/android/android.pro b/src/plugins/platforms/android/android.pro
index 346df84038..730247cd7f 100644
--- a/src/plugins/platforms/android/android.pro
+++ b/src/plugins/platforms/android/android.pro
@@ -1,9 +1,5 @@
 TARGET = qtforandroid
 
-# STATICPLUGIN needed because there's a Q_IMPORT_PLUGIN in androidjnimain.cpp
-# Yes, the plugin imports itself statically
-DEFINES += QT_STATICPLUGIN
-
 LIBS += -ljnigraphics -landroid
 
 QT += \
@@ -19,7 +15,8 @@ INCLUDEPATH += \
     $$PWD \
     $$QT_SOURCE_TREE/src/3rdparty/android
 
-SOURCES += $$PWD/androidplatformplugin.cpp \
+SOURCES += $$PWD/main.cpp \
+           $$PWD/androidplatformplugin.cpp \
            $$PWD/androidcontentfileengine.cpp \
            $$PWD/androiddeadlockprotector.cpp \
            $$PWD/androidjnimain.cpp \
@@ -92,4 +89,5 @@ qtConfig(vulkan) {
 }
 
 PLUGIN_TYPE = platforms
+PLUGIN_CLASS_NAME = QAndroidIntegrationPlugin
 load(qt_plugin)
diff --git a/src/plugins/platforms/android/androidjnimain.cpp b/src/plugins/platforms/android/androidjnimain.cpp
index 915f7f0f5b..27eb337aaa 100644
--- a/src/plugins/platforms/android/androidjnimain.cpp
+++ b/src/plugins/platforms/android/androidjnimain.cpp
@@ -68,8 +68,6 @@
 
 #include <qpa/qwindowsysteminterface.h>
 
-Q_IMPORT_PLUGIN(QAndroidPlatformIntegrationPlugin)
-
 QT_BEGIN_NAMESPACE
 
 static JavaVM *m_javaVM = nullptr;
diff --git a/src/plugins/platforms/android/main.cpp b/src/plugins/platforms/android/main.cpp
new file mode 100644
index 0000000000..c304fc8d69
--- /dev/null
+++ b/src/plugins/platforms/android/main.cpp
@@ -0,0 +1,63 @@
+/****************************************************************************
+**
+** Copyright (C) 2019 BogDan Vatra <bogdan@kde.org>
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the plugins of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 3 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL3 included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 3 requirements
+** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 2.0 or (at your option) the GNU General
+** Public license version 3 or any later version approved by the KDE Free
+** Qt Foundation. The licenses are as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-2.0.html and
+** https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+
+#include <qpa/qplatformintegrationplugin.h>
+#include "qandroidplatformintegration.h"
+
+QT_BEGIN_NAMESPACE
+
+class QAndroidIntegrationPlugin : public QPlatformIntegrationPlugin
+{
+    Q_OBJECT
+    Q_PLUGIN_METADATA(IID QPlatformIntegrationFactoryInterface_iid FILE "android.json")
+
+public:
+    QPlatformIntegration *create(const QString& system, const QStringList& paramList) override;
+};
+
+QPlatformIntegration *QAndroidIntegrationPlugin::create(const QString& system, const QStringList& paramList)
+{
+    if (!system.compare(QLatin1String("android"), Qt::CaseInsensitive))
+        return new QAndroidPlatformIntegration(paramList);
+
+    return nullptr;
+}
+
+QT_END_NAMESPACE
diff --git a/src/plugins/platforms/android/qandroidplatformwindow.h b/src/plugins/platforms/android/qandroidplatformwindow.h
index 5edd274759..d8eb6b7b7f 100644
--- a/src/plugins/platforms/android/qandroidplatformwindow.h
+++ b/src/plugins/platforms/android/qandroidplatformwindow.h
@@ -65,8 +65,8 @@ public:
     void setParent(const QPlatformWindow *window) override;
     WId winId() const override { return m_windowId; }
 
-    bool setMouseGrabEnabled(bool grab) override { return false; }
-    bool setKeyboardGrabEnabled(bool grab) override { return false; }
+    bool setMouseGrabEnabled(bool grab) override { Q_UNUSED(grab); return false; }
+    bool setKeyboardGrabEnabled(bool grab) override { Q_UNUSED(grab); return false; }
 
     QAndroidPlatformScreen *platformScreen() const;
 
diff --git a/src/plugins/platforms/cocoa/qcocoawindow.h b/src/plugins/platforms/cocoa/qcocoawindow.h
index 72b5a17475..1e46cd2dde 100644
--- a/src/plugins/platforms/cocoa/qcocoawindow.h
+++ b/src/plugins/platforms/cocoa/qcocoawindow.h
@@ -162,7 +162,6 @@ public:
     Q_NOTIFICATION_HANDLER(NSWindowDidOrderOffScreenNotification) void windowDidOrderOffScreen();
     Q_NOTIFICATION_HANDLER(NSWindowDidChangeOcclusionStateNotification) void windowDidChangeOcclusionState();
     Q_NOTIFICATION_HANDLER(NSWindowDidChangeScreenNotification) void windowDidChangeScreen();
-    Q_NOTIFICATION_HANDLER(NSWindowDidChangeBackingPropertiesNotification) void windowDidChangeBackingProperties();
     Q_NOTIFICATION_HANDLER(NSWindowWillCloseNotification) void windowWillClose();
 
     bool windowShouldClose();
diff --git a/src/plugins/platforms/cocoa/qcocoawindow.mm b/src/plugins/platforms/cocoa/qcocoawindow.mm
index bac064dfc5..8ff2890ed2 100644
--- a/src/plugins/platforms/cocoa/qcocoawindow.mm
+++ b/src/plugins/platforms/cocoa/qcocoawindow.mm
@@ -1259,17 +1259,6 @@ void QCocoaWindow::windowDidChangeScreen()
         currentScreen->requestUpdate();
     }
 }
-/*
-    The window's backing scale factor or color space has changed.
-*/
-void QCocoaWindow::windowDidChangeBackingProperties()
-{
-    // Ideally we would plumb this thought QPA in a way that lets clients
-    // invalidate their own caches, and recreate QBackingStore. For now we
-    // trigger an expose, and let QCocoaBackingStore deal with its own
-    // buffer invalidation.
-    [m_view setNeedsDisplay:YES];
-}
 
 void QCocoaWindow::windowWillClose()
 {
diff --git a/src/plugins/platforms/cocoa/qnsview_drawing.mm b/src/plugins/platforms/cocoa/qnsview_drawing.mm
index d2e6f848a0..e72142466b 100644
--- a/src/plugins/platforms/cocoa/qnsview_drawing.mm
+++ b/src/plugins/platforms/cocoa/qnsview_drawing.mm
@@ -173,20 +173,6 @@
 }
 #endif
 
-- (void)updateMetalLayerDrawableSize:(CAMetalLayer *)layer
-{
-    CGSize drawableSize = layer.bounds.size;
-    drawableSize.width *= layer.contentsScale;
-    drawableSize.height *= layer.contentsScale;
-    layer.drawableSize = drawableSize;
-}
-
-- (void)layoutSublayersOfLayer:(CALayer *)layer
-{
-    if ([layer isKindOfClass:CAMetalLayer.class])
-        [self updateMetalLayerDrawableSize:static_cast<CAMetalLayer* >(layer)];
-}
-
 - (void)displayLayer:(CALayer *)layer
 {
     if (!NSThread.isMainThread) {
@@ -211,17 +197,16 @@
 
 - (void)viewDidChangeBackingProperties
 {
-    CALayer *layer = self.layer;
-    if (!layer)
-        return;
+    qCDebug(lcQpaDrawing) << "Backing properties changed for" << self;
 
-    layer.contentsScale = self.window.backingScaleFactor;
+    if (self.layer)
+        self.layer.contentsScale = self.window.backingScaleFactor;
 
-    // Metal layers must be manually updated on e.g. screen change
-    if ([layer isKindOfClass:CAMetalLayer.class]) {
-        [self updateMetalLayerDrawableSize:static_cast<CAMetalLayer* >(layer)];
-        [self setNeedsDisplay:YES];
-    }
+    // Ideally we would plumb this situation through QPA in a way that lets
+    // clients invalidate their own caches, recreate QBackingStore, etc.
+    // For now we trigger an expose, and let QCocoaBackingStore deal with
+    // buffer invalidation internally.
+    [self setNeedsDisplay:YES];
 }
 
 @end
diff --git a/src/sql/kernel/qsqldatabase.cpp b/src/sql/kernel/qsqldatabase.cpp
index 99aa3e96c4..01726d79ef 100644
--- a/src/sql/kernel/qsqldatabase.cpp
+++ b/src/sql/kernel/qsqldatabase.cpp
@@ -881,6 +881,14 @@ bool QSqlDatabase::rollback()
     connection name must be passed to addDatabase() at connection
     object create time.
 
+    For the QSQLITE driver, if the database name specified does not
+    exist, then it will create the file for you unless the
+    QSQLITE_OPEN_READONLY option is set.
+
+    Additionally, \a name can be set to \c ":memory:" which will
+    create a temporary database which is only available for the
+    lifetime of the application.
+
     For the QOCI (Oracle) driver, the database name is the TNS
     Service Name.
 
diff --git a/src/widgets/styles/qstylesheetstyle.cpp b/src/widgets/styles/qstylesheetstyle.cpp
index 48d2e268b8..88c6c288e8 100644
--- a/src/widgets/styles/qstylesheetstyle.cpp
+++ b/src/widgets/styles/qstylesheetstyle.cpp
@@ -2735,6 +2735,11 @@ static void updateObjects(const QList<const QObject *>& objects)
         if (auto widget = qobject_cast<QWidget*>(const_cast<QObject*>(object))) {
             widget->style()->polish(widget);
             QCoreApplication::sendEvent(widget, &event);
+            QList<const QObject *> children;
+            children.reserve(widget->children().size() + 1);
+            for (auto child: qAsConst(widget->children()))
+                children.append(child);
+            updateObjects(children);
         }
     }
 }
diff --git a/src/widgets/widgets/qabstractspinbox.cpp b/src/widgets/widgets/qabstractspinbox.cpp
index d49d9dbd66..fc19e0793e 100644
--- a/src/widgets/widgets/qabstractspinbox.cpp
+++ b/src/widgets/widgets/qabstractspinbox.cpp
@@ -1726,7 +1726,7 @@ void QAbstractSpinBox::initStyleOption(QStyleOptionSpinBox *option) const
         option->activeSubControls = d->hoverControl;
     }
 
-    option->stepEnabled = style()->styleHint(QStyle::SH_SpinControls_DisableOnBounds)
+    option->stepEnabled = style()->styleHint(QStyle::SH_SpinControls_DisableOnBounds, nullptr, this)
                       ? stepEnabled()
                       : (QAbstractSpinBox::StepDownEnabled|QAbstractSpinBox::StepUpEnabled);