Merge remote-tracking branch 'origin/dev' into wip/scenegraphng

Change-Id: Iba540adaeffb0098fc4e1923050eb611bf47287b

64 files changed, 723 insertions, 298 deletions

diff --git a/src/quick/items/context2d/qquickcanvasitem.cpp b/src/quick/items/context2d/qquickcanvasitem.cpp
index b772ed97d2..1167f408f5 100644
--- a/src/quick/items/context2d/qquickcanvasitem.cpp
+++ b/src/quick/items/context2d/qquickcanvasitem.cpp
@@ -640,6 +640,17 @@ void QQuickCanvasItem::releaseResources()
     }
 }
 
+bool QQuickCanvasItem::event(QEvent *event)
+{
+    switch (event->type()) {
+    case QEvent::PolishRequest:
+        polish();
+        return true;
+    default:
+        return QQuickItem::event(event);
+    }
+}
+
 void QQuickCanvasItem::invalidateSceneGraph()
 {
     Q_D(QQuickCanvasItem);
@@ -651,6 +662,12 @@ void QQuickCanvasItem::invalidateSceneGraph()
     d->textureProvider = 0;
 }
 
+void QQuickCanvasItem::schedulePolish()
+{
+    auto polishRequestEvent = new QEvent(QEvent::PolishRequest);
+    QCoreApplication::postEvent(this, polishRequestEvent);
+}
+
 void QQuickCanvasItem::componentComplete()
 {
     QQuickItem::componentComplete();
@@ -892,8 +909,9 @@ void QQuickCanvasItem::requestAnimationFrame(QQmlV4Function *args)
 
     d->animationCallbacks.insert(++id, QV4::PersistentValue(scope.engine, f->asReturnedValue()));
 
+    // QTBUG-55778: Calling polish directly here can lead to a polish loop
     if (isVisible())
-        polish();
+        schedulePolish();
 
     args->setReturnValue(QV4::Encode(id));
 }
diff --git a/src/quick/items/context2d/qquickcanvasitem_p.h b/src/quick/items/context2d/qquickcanvasitem_p.h
index 8af84d0e7c..217ae9bb69 100644
--- a/src/quick/items/context2d/qquickcanvasitem_p.h
+++ b/src/quick/items/context2d/qquickcanvasitem_p.h
@@ -182,6 +182,7 @@ private Q_SLOTS:
     void sceneGraphInitialized();
     void checkAnimationCallbacks();
     void invalidateSceneGraph();
+    void schedulePolish();
 
 protected:
     void componentComplete() Q_DECL_OVERRIDE;
@@ -190,6 +191,7 @@ protected:
     QSGNode *updatePaintNode(QSGNode *, UpdatePaintNodeData *) Q_DECL_OVERRIDE;
     void geometryChanged(const QRectF &newGeometry, const QRectF &oldGeometry) Q_DECL_OVERRIDE;
     void releaseResources() Q_DECL_OVERRIDE;
+    bool event(QEvent *event) Q_DECL_OVERRIDE;
 private:
     Q_DECLARE_PRIVATE(QQuickCanvasItem)
     Q_INVOKABLE void delayedCreate();
diff --git a/src/quick/items/context2d/qquickcontext2d.cpp b/src/quick/items/context2d/qquickcontext2d.cpp
index b0c1d50907..b9b701313e 100644
--- a/src/quick/items/context2d/qquickcontext2d.cpp
+++ b/src/quick/items/context2d/qquickcontext2d.cpp
@@ -901,7 +901,7 @@ struct QQuickJSContext2DPixelData : public QV4::Object
     V4_NEEDS_DESTROY
 
     static QV4::ReturnedValue getIndexed(const QV4::Managed *m, uint index, bool *hasProperty);
-    static void putIndexed(QV4::Managed *m, uint index, const QV4::Value &value);
+    static bool putIndexed(QV4::Managed *m, uint index, const QV4::Value &value);
 
     static void proto_get_length(const QV4::BuiltinFunction *, QV4::Scope &scope, QV4::CallData *callData);
 };
@@ -1879,7 +1879,7 @@ void QQuickJSContext2D::method_get_lineWidth(const QV4::BuiltinFunction *, QV4::
     QV4::Scoped<QQuickJSContext2D> r(scope, callData->thisObject);
     CHECK_CONTEXT(r)
 
-    RETURN_RESULT(r->d()->context->state.lineWidth);
+    RETURN_RESULT(QV4::Encode(r->d()->context->state.lineWidth));
 }
 
 void QQuickJSContext2D::method_set_lineWidth(const QV4::BuiltinFunction *, QV4::Scope &scope, QV4::CallData *callData)
@@ -1906,7 +1906,7 @@ void QQuickJSContext2D::method_get_miterLimit(const QV4::BuiltinFunction *, QV4:
     QV4::Scoped<QQuickJSContext2D> r(scope, callData->thisObject);
     CHECK_CONTEXT(r)
 
-    RETURN_RESULT(r->d()->context->state.miterLimit);
+    RETURN_RESULT(QV4::Encode(r->d()->context->state.miterLimit));
 }
 
 void QQuickJSContext2D::method_set_miterLimit(const QV4::BuiltinFunction *, QV4::Scope &scope, QV4::CallData *callData)
@@ -1933,7 +1933,7 @@ void QQuickJSContext2D::method_get_shadowBlur(const QV4::BuiltinFunction *, QV4:
     QV4::Scoped<QQuickJSContext2D> r(scope, callData->thisObject);
     CHECK_CONTEXT(r)
 
-    RETURN_RESULT(r->d()->context->state.shadowBlur);
+    RETURN_RESULT(QV4::Encode(r->d()->context->state.shadowBlur));
 }
 
 void QQuickJSContext2D::method_set_shadowBlur(const QV4::BuiltinFunction *, QV4::Scope &scope, QV4::CallData *callData)
@@ -1990,7 +1990,7 @@ void QQuickJSContext2D::method_get_shadowOffsetX(const QV4::BuiltinFunction *, Q
     QV4::Scoped<QQuickJSContext2D> r(scope, callData->thisObject);
     CHECK_CONTEXT(r)
 
-    RETURN_RESULT(r->d()->context->state.shadowOffsetX);
+    RETURN_RESULT(QV4::Encode(r->d()->context->state.shadowOffsetX));
 }
 
 void QQuickJSContext2D::method_set_shadowOffsetX(const QV4::BuiltinFunction *, QV4::Scope &scope, QV4::CallData *callData)
@@ -2016,7 +2016,7 @@ void QQuickJSContext2D::method_get_shadowOffsetY(const QV4::BuiltinFunction *, Q
     QV4::Scoped<QQuickJSContext2D> r(scope, callData->thisObject);
     CHECK_CONTEXT(r)
 
-    RETURN_RESULT(r->d()->context->state.shadowOffsetY);
+    RETURN_RESULT(QV4::Encode(r->d()->context->state.shadowOffsetY));
 }
 
 void QQuickJSContext2D::method_set_shadowOffsetY(const QV4::BuiltinFunction *, QV4::Scope &scope, QV4::CallData *callData)
@@ -3043,7 +3043,7 @@ void QQuickJSContext2DPixelData::proto_get_length(const QV4::BuiltinFunction *,
     if (!r || r->d()->image->isNull())
         RETURN_UNDEFINED();
 
-    RETURN_RESULT(r->d()->image->width() * r->d()->image->height() * 4);
+    RETURN_RESULT(QV4::Encode(r->d()->image->width() * r->d()->image->height() * 4));
 }
 
 QV4::ReturnedValue QQuickJSContext2DPixelData::getIndexed(const QV4::Managed *m, uint index, bool *hasProperty)
@@ -3077,13 +3077,13 @@ QV4::ReturnedValue QQuickJSContext2DPixelData::getIndexed(const QV4::Managed *m,
     return QV4::Encode::undefined();
 }
 
-void QQuickJSContext2DPixelData::putIndexed(QV4::Managed *m, uint index, const QV4::Value &value)
+bool QQuickJSContext2DPixelData::putIndexed(QV4::Managed *m, uint index, const QV4::Value &value)
 {
     Q_ASSERT(m->as<QQuickJSContext2DPixelData>());
     QV4::ExecutionEngine *v4 = static_cast<QQuickJSContext2DPixelData *>(m)->engine();
     QV4::Scope scope(v4);
     if (scope.hasException())
-        return;
+        return false;
 
     QV4::Scoped<QQuickJSContext2DPixelData> r(scope, static_cast<QQuickJSContext2DPixelData *>(m));
 
@@ -3109,7 +3109,10 @@ void QQuickJSContext2DPixelData::putIndexed(QV4::Managed *m, uint index, const Q
             *pixel = qRgba(qRed(*pixel), qGreen(*pixel), qBlue(*pixel), v);
             break;
         }
+        return true;
     }
+
+    return false;
 }
 /*!
     \qmlmethod CanvasImageData QtQuick::Context2D::createImageData(real sw, real sh)
diff --git a/src/quick/items/qquickanimatedimage.cpp b/src/quick/items/qquickanimatedimage.cpp
index a1833081c8..22ea4774be 100644
--- a/src/quick/items/qquickanimatedimage.cpp
+++ b/src/quick/items/qquickanimatedimage.cpp
@@ -67,7 +67,7 @@ QQuickPixmap* QQuickAnimatedImagePrivate::infoForCurrentFrame(QQmlEngine *engine
                                 .arg(current));
         }
         if (!requestedUrl.isEmpty()) {
-            if (QQuickPixmap::isCached(requestedUrl, QSize()))
+            if (QQuickPixmap::isCached(requestedUrl, QSize(), QQuickImageProviderOptions()))
                 pixmap = new QQuickPixmap(engine, requestedUrl);
             else
                 pixmap = new QQuickPixmap(requestedUrl, _movie->currentImage());
diff --git a/src/quick/items/qquickevents_p_p.h b/src/quick/items/qquickevents_p_p.h
index 7b281623fe..cf6f83e5b1 100644
--- a/src/quick/items/qquickevents_p_p.h
+++ b/src/quick/items/qquickevents_p_p.h
@@ -108,7 +108,9 @@ public:
     bool isAccepted() { return event.isAccepted(); }
     void setAccepted(bool accepted) { event.setAccepted(accepted); }
 
+#if QT_CONFIG(shortcut)
     Q_REVISION(2) Q_INVOKABLE bool matches(QKeySequence::StandardKey key) const { return event.matches(key); }
+#endif
 
 private:
     QKeyEvent event;
diff --git a/src/quick/items/qquickimage.cpp b/src/quick/items/qquickimage.cpp
index f71a2fbdbd..f3d7dc4b56 100644
--- a/src/quick/items/qquickimage.cpp
+++ b/src/quick/items/qquickimage.cpp
@@ -514,37 +514,41 @@ void QQuickImage::updatePaintedGeometry()
             setImplicitSize(0, 0);
             return;
         }
-        qreal w = widthValid() ? width() : d->pix.width();
-        qreal widthScale = w / qreal(d->pix.width());
-        qreal h = heightValid() ? height() : d->pix.height();
-        qreal heightScale = h / qreal(d->pix.height());
+        const qreal pixWidth = d->pix.width() / d->devicePixelRatio;
+        const qreal pixHeight = d->pix.height() / d->devicePixelRatio;
+        const qreal w = widthValid() ? width() : pixWidth;
+        const qreal widthScale = w / pixWidth;
+        const qreal h = heightValid() ? height() : pixHeight;
+        const qreal heightScale = h / pixHeight;
         if (widthScale <= heightScale) {
             d->paintedWidth = w;
-            d->paintedHeight = widthScale * qreal(d->pix.height());
+            d->paintedHeight = widthScale * pixHeight;
         } else if (heightScale < widthScale) {
-            d->paintedWidth = heightScale * qreal(d->pix.width());
+            d->paintedWidth = heightScale * pixWidth;
             d->paintedHeight = h;
         }
-        qreal iHeight = (widthValid() && !heightValid()) ? d->paintedHeight : d->pix.height();
-        qreal iWidth = (heightValid() && !widthValid()) ? d->paintedWidth : d->pix.width();
+        const qreal iHeight = (widthValid() && !heightValid()) ? d->paintedHeight : pixHeight;
+        const qreal iWidth = (heightValid() && !widthValid()) ? d->paintedWidth : pixWidth;
         setImplicitSize(iWidth, iHeight);
 
     } else if (d->fillMode == PreserveAspectCrop) {
         if (!d->pix.width() || !d->pix.height())
             return;
-        qreal widthScale = width() / qreal(d->pix.width());
-        qreal heightScale = height() / qreal(d->pix.height());
+        const qreal pixWidth = d->pix.width() / d->devicePixelRatio;
+        const qreal pixHeight = d->pix.height() / d->devicePixelRatio;
+        qreal widthScale = width() / pixWidth;
+        qreal heightScale = height() / pixHeight;
         if (widthScale < heightScale) {
             widthScale = heightScale;
         } else if (heightScale < widthScale) {
             heightScale = widthScale;
         }
 
-        d->paintedHeight = heightScale * qreal(d->pix.height());
-        d->paintedWidth = widthScale * qreal(d->pix.width());
+        d->paintedHeight = heightScale * pixHeight;
+        d->paintedWidth = widthScale * pixWidth;
     } else if (d->fillMode == Pad) {
-        d->paintedWidth = d->pix.width();
-        d->paintedHeight = d->pix.height();
+        d->paintedWidth = d->pix.width() / d->devicePixelRatio;
+        d->paintedHeight = d->pix.height() / d->devicePixelRatio;
     } else {
         d->paintedWidth = width();
         d->paintedHeight = height();
diff --git a/src/quick/items/qquickimage_p_p.h b/src/quick/items/qquickimage_p_p.h
index 522dbca803..afc33def0f 100644
--- a/src/quick/items/qquickimage_p_p.h
+++ b/src/quick/items/qquickimage_p_p.h
@@ -58,7 +58,7 @@ QT_BEGIN_NAMESPACE
 
 class QQuickImageTextureProvider;
 
-class QQuickImagePrivate : public QQuickImageBasePrivate
+class Q_QUICK_PRIVATE_EXPORT QQuickImagePrivate : public QQuickImageBasePrivate
 {
     Q_DECLARE_PUBLIC(QQuickImage)
 
diff --git a/src/quick/items/qquickimagebase.cpp b/src/quick/items/qquickimagebase.cpp
index 22d631e917..33d69f5032 100644
--- a/src/quick/items/qquickimagebase.cpp
+++ b/src/quick/items/qquickimagebase.cpp
@@ -49,6 +49,30 @@
 
 QT_BEGIN_NAMESPACE
 
+// This function gives derived classes the chance set the devicePixelRatio
+// if they're not happy with our implementation of it.
+bool QQuickImageBasePrivate::updateDevicePixelRatio(qreal targetDevicePixelRatio)
+{
+    // QQuickImageProvider and SVG can generate a high resolution image when
+    // sourceSize is set (this function is only called if it's set).
+    // If sourceSize is not set then the provider default size will be used, as usual.
+    bool setDevicePixelRatio = false;
+    if (url.scheme() == QLatin1String("image")) {
+        setDevicePixelRatio = true;
+    } else {
+        QString stringUrl = url.path(QUrl::PrettyDecoded);
+        if (stringUrl.endsWith(QLatin1String("svg")) ||
+            stringUrl.endsWith(QLatin1String("svgz"))) {
+            setDevicePixelRatio = true;
+        }
+    }
+
+    if (setDevicePixelRatio)
+        devicePixelRatio = targetDevicePixelRatio;
+
+    return setDevicePixelRatio;
+}
+
 QQuickImageBase::QQuickImageBase(QQuickItem *parent)
 : QQuickImplicitSizeItem(*(new QQuickImageBasePrivate), parent)
 {
@@ -221,26 +245,11 @@ void QQuickImageBase::load()
 
         QUrl loadUrl = d->url;
 
-        // QQuickImageProvider and SVG can generate a high resolution image when
-        // sourceSize is set. If sourceSize is not set then the provider default size
-        // will be used, as usual.
-        bool setDevicePixelRatio = false;
-        if (d->sourcesize.isValid()) {
-            if (loadUrl.scheme() == QLatin1String("image")) {
-                setDevicePixelRatio = true;
-            } else {
-                QString stringUrl = loadUrl.path(QUrl::PrettyDecoded);
-                if (stringUrl.endsWith(QLatin1String("svg")) ||
-                    stringUrl.endsWith(QLatin1String("svgz"))) {
-                    setDevicePixelRatio = true;
-                }
-            }
-
-            if (setDevicePixelRatio)
-                d->devicePixelRatio = targetDevicePixelRatio;
-        }
+        bool updatedDevicePixelRatio = false;
+        if (d->sourcesize.isValid())
+            updatedDevicePixelRatio = d->updateDevicePixelRatio(targetDevicePixelRatio);
 
-        if (!setDevicePixelRatio) {
+        if (!updatedDevicePixelRatio) {
             // (possible) local file: loadUrl and d->devicePixelRatio will be modified if
             // an "@2x" file is found.
             resolve2xLocalFile(d->url, targetDevicePixelRatio, &loadUrl, &d->devicePixelRatio);
diff --git a/src/quick/items/qquickimagebase_p_p.h b/src/quick/items/qquickimagebase_p_p.h
index d9b609c7fe..1b771166a2 100644
--- a/src/quick/items/qquickimagebase_p_p.h
+++ b/src/quick/items/qquickimagebase_p_p.h
@@ -59,7 +59,7 @@
 QT_BEGIN_NAMESPACE
 
 class QNetworkReply;
-class QQuickImageBasePrivate : public QQuickImplicitSizeItemPrivate
+class Q_QUICK_PRIVATE_EXPORT QQuickImageBasePrivate : public QQuickImplicitSizeItemPrivate
 {
     Q_DECLARE_PUBLIC(QQuickImageBase)
 
@@ -75,6 +75,8 @@ public:
     {
     }
 
+    virtual bool updateDevicePixelRatio(qreal targetDevicePixelRatio);
+
     QQuickPixmap pix;
     QQuickImageBase::Status status;
     QUrl url;
diff --git a/src/quick/items/qquickitem.cpp b/src/quick/items/qquickitem.cpp
index f7b9a58329..22ee3f39e4 100644
--- a/src/quick/items/qquickitem.cpp
+++ b/src/quick/items/qquickitem.cpp
@@ -7865,6 +7865,7 @@ QQuickItemLayer::QQuickItemLayer(QQuickItem *item)
     , m_effect(0)
     , m_effectSource(0)
     , m_textureMirroring(QQuickShaderEffectSource::MirrorVertically)
+    , m_samples(0)
 {
 }
 
@@ -7939,6 +7940,7 @@ void QQuickItemLayer::activate()
     m_effectSource->setWrapMode(m_wrapMode);
     m_effectSource->setFormat(m_format);
     m_effectSource->setTextureMirroring(m_textureMirroring);
+    m_effectSource->setSamples(m_samples);
 
     if (m_effectComponent)
         activateEffect();
@@ -8232,6 +8234,44 @@ void QQuickItemLayer::setTextureMirroring(QQuickShaderEffectSource::TextureMirro
 }
 
 /*!
+    \qmlproperty enumeration QtQuick::Item::layer.samples
+    \since 5.10
+
+    This property allows requesting multisampled rendering in the layer.
+
+    By default multisampling is enabled whenever multisampling is
+    enabled for the entire window, assuming the scenegraph renderer in
+    use and the underlying graphics API supports this.
+
+    By setting the value to 2, 4, etc. multisampled rendering can be requested
+    for a part of the scene without enabling multisampling for the entire
+    scene. This way multisampling is applied only to a given subtree, which can
+    lead to significant performance gains since multisampling is not applied to
+    other parts of the scene.
+
+    \note Enabling multisampling can be potentially expensive regardless of the
+    layer's size, as it incurs a hardware and driver dependent performance and
+    memory cost.
+
+    \note This property is only functional when support for multisample
+    renderbuffers and framebuffer blits is available. Otherwise the value is
+    silently ignored.
+ */
+
+void QQuickItemLayer::setSamples(int count)
+{
+    if (m_samples == count)
+        return;
+
+    m_samples = count;
+
+    if (m_effectSource)
+        m_effectSource->setSamples(m_samples);
+
+    emit samplesChanged(count);
+}
+
+/*!
     \qmlproperty string QtQuick::Item::layer.samplerName
 
     Holds the name of the effect's source texture property.
diff --git a/src/quick/items/qquickitem_p.h b/src/quick/items/qquickitem_p.h
index c0c9bd46bd..797ba42781 100644
--- a/src/quick/items/qquickitem_p.h
+++ b/src/quick/items/qquickitem_p.h
@@ -152,6 +152,8 @@ class QQuickItemLayer : public QObject, public QQuickItemChangeListener
     Q_PROPERTY(QByteArray samplerName READ name WRITE setName NOTIFY nameChanged)
     Q_PROPERTY(QQmlComponent *effect READ effect WRITE setEffect NOTIFY effectChanged)
     Q_PROPERTY(QQuickShaderEffectSource::TextureMirroring textureMirroring READ textureMirroring WRITE setTextureMirroring NOTIFY textureMirroringChanged)
+    Q_PROPERTY(int samples READ samples WRITE setSamples NOTIFY samplesChanged)
+
 public:
     QQuickItemLayer(QQuickItem *item);
     ~QQuickItemLayer();
@@ -189,6 +191,9 @@ public:
     QQuickShaderEffectSource::TextureMirroring textureMirroring() const { return m_textureMirroring; }
     void setTextureMirroring(QQuickShaderEffectSource::TextureMirroring mirroring);
 
+    int samples() const { return m_samples; }
+    void setSamples(int count);
+
     QQuickShaderEffectSource *effectSource() const { return m_effectSource; }
 
     void itemGeometryChanged(QQuickItem *, QQuickGeometryChange, const QRectF &) Q_DECL_OVERRIDE;
@@ -213,6 +218,7 @@ Q_SIGNALS:
     void formatChanged(QQuickShaderEffectSource::Format format);
     void sourceRectChanged(const QRectF &sourceRect);
     void textureMirroringChanged(QQuickShaderEffectSource::TextureMirroring mirroring);
+    void samplesChanged(int count);
 
 private:
     friend class QQuickTransformAnimatorJob;
@@ -237,6 +243,7 @@ private:
     QQuickItem *m_effect;
     QQuickShaderEffectSource *m_effectSource;
     QQuickShaderEffectSource::TextureMirroring m_textureMirroring;
+    int m_samples;
 };
 
 #endif
diff --git a/src/quick/items/qquickitemgrabresult.cpp b/src/quick/items/qquickitemgrabresult.cpp
index 07c2cb607c..12bcd43076 100644
--- a/src/quick/items/qquickitemgrabresult.cpp
+++ b/src/quick/items/qquickitemgrabresult.cpp
@@ -75,7 +75,7 @@ public:
 
     void ensureImageInCache() const {
         if (url.isEmpty() && !image.isNull()) {
-            url.setScheme(QStringLiteral("ItemGrabber"));
+            url.setScheme(QQuickPixmap::itemGrabberScheme);
             url.setPath(QVariant::fromValue(item.data()).toString());
             static uint counter = 0;
             url.setFragment(QString::number(++counter));
diff --git a/src/quick/items/qquickitemsmodule.cpp b/src/quick/items/qquickitemsmodule.cpp
index 65143f3e9b..43f4b88833 100644
--- a/src/quick/items/qquickitemsmodule.cpp
+++ b/src/quick/items/qquickitemsmodule.cpp
@@ -397,6 +397,10 @@ static void qt_quickitems_defineModule(const char *uri, int major, int minor)
     qmlRegisterUncreatableType<QQuickBasePositioner, 9>(uri, 2, 9, "Positioner",
                                                   QStringLiteral("Positioner is an abstract type that is only available as an attached property."));
 #endif
+
+#if QT_CONFIG(quick_shadereffect)
+    qmlRegisterType<QQuickShaderEffectSource, 2>(uri, 2, 9, "ShaderEffectSource");
+#endif
 }
 
 static void initResources()
diff --git a/src/quick/items/qquickopenglshadereffect_p.h b/src/quick/items/qquickopenglshadereffect_p.h
index 64e79a9343..bc2e2975ee 100644
--- a/src/quick/items/qquickopenglshadereffect_p.h
+++ b/src/quick/items/qquickopenglshadereffect_p.h
@@ -70,7 +70,6 @@ QT_REQUIRE_CONFIG(quick_shadereffect);
 QT_BEGIN_NAMESPACE
 
 class QSGContext;
-class QSignalMapper;
 class QFileSelector;
 class QQuickOpenGLCustomMaterialShader;
 
diff --git a/src/quick/items/qquickpositioners.cpp b/src/quick/items/qquickpositioners.cpp
index 05d3ae0191..70fc5fa65f 100644
--- a/src/quick/items/qquickpositioners.cpp
+++ b/src/quick/items/qquickpositioners.cpp
@@ -44,15 +44,23 @@
 #include <QtQml/qqmlinfo.h>
 #include <QtCore/qcoreapplication.h>
 
-#include <QtQuick/private/qquickstate_p.h>
-#include <QtQuick/private/qquickstategroup_p.h>
-#include <private/qquickstatechangescript_p.h>
 #include <QtQuick/private/qquicktransition_p.h>
 
 QT_BEGIN_NAMESPACE
 
-static const QQuickItemPrivate::ChangeTypes watchedChanges
-    = QQuickItemPrivate::Geometry
+// The default item change types that positioners are interested in.
+static const QQuickItemPrivate::ChangeTypes explicitSizeItemChangeTypes =
+    QQuickItemPrivate::Geometry
+    | QQuickItemPrivate::SiblingOrder
+    | QQuickItemPrivate::Visibility
+    | QQuickItemPrivate::Destroyed;
+
+// The item change types for positioners that are only interested in the implicit
+// size of the items they manage. These are used if useImplicitSize is true.
+// useImplicitSize should be set in the constructor, before any items are added.
+static const QQuickItemPrivate::ChangeTypes implicitSizeItemChangeTypes =
+    QQuickItemPrivate::ImplicitWidth
+    | QQuickItemPrivate::ImplicitHeight
     | QQuickItemPrivate::SiblingOrder
     | QQuickItemPrivate::Visibility
     | QQuickItemPrivate::Destroyed;
@@ -60,13 +68,15 @@ static const QQuickItemPrivate::ChangeTypes watchedChanges
 void QQuickBasePositionerPrivate::watchChanges(QQuickItem *other)
 {
     QQuickItemPrivate *otherPrivate = QQuickItemPrivate::get(other);
-    otherPrivate->addItemChangeListener(this, watchedChanges);
+    otherPrivate->addItemChangeListener(this, useImplicitSize
+        ? implicitSizeItemChangeTypes : explicitSizeItemChangeTypes);
 }
 
 void QQuickBasePositionerPrivate::unwatchChanges(QQuickItem* other)
 {
     QQuickItemPrivate *otherPrivate = QQuickItemPrivate::get(other);
-    otherPrivate->removeItemChangeListener(this, watchedChanges);
+    otherPrivate->removeItemChangeListener(this, useImplicitSize
+        ? implicitSizeItemChangeTypes : explicitSizeItemChangeTypes);
 }
 
 
@@ -326,7 +336,7 @@ void QQuickBasePositioner::prePositioning()
         if (wIdx < 0) {
             d->watchChanges(child);
             posItem.isNew = true;
-            if (!childPrivate->explicitVisible || !child->width() || !child->height()) {
+            if (!childPrivate->explicitVisible || !d->itemWidth(child) || !d->itemHeight(child)) {
                 posItem.isVisible = false;
                 posItem.index = -1;
                 unpositionedItems.append(posItem);
@@ -348,7 +358,7 @@ void QQuickBasePositioner::prePositioning()
             PositionedItem *item = &oldItems[wIdx];
             // Items are only omitted from positioning if they are explicitly hidden
             // i.e. their positioning is not affected if an ancestor is hidden.
-            if (!childPrivate->explicitVisible || !child->width() || !child->height()) {
+            if (!childPrivate->explicitVisible || !d->itemWidth(child) || !d->itemHeight(child)) {
                 item->isVisible = false;
                 item->index = -1;
                 unpositionedItems.append(*item);
@@ -947,6 +957,7 @@ QQuickColumn::QQuickColumn(QQuickItem *parent)
 void QQuickColumn::doPositioning(QSizeF *contentSize)
 {
     //Precondition: All items in the positioned list have a valid item pointer and should be positioned
+    QQuickBasePositionerPrivate *d = static_cast<QQuickBasePositionerPrivate*>(QQuickBasePositionerPrivate::get(this));
     qreal voffset = topPadding();
     const qreal padding = leftPadding() + rightPadding();
     contentSize->setWidth(qMax(contentSize->width(), padding));
@@ -955,9 +966,9 @@ void QQuickColumn::doPositioning(QSizeF *contentSize)
         PositionedItem &child = positionedItems[ii];
         positionItem(child.itemX() + leftPadding() - child.leftPadding, voffset, &child);
         child.updatePadding(leftPadding(), topPadding(), rightPadding(), bottomPadding());
-        contentSize->setWidth(qMax(contentSize->width(), child.item->width() + padding));
+        contentSize->setWidth(qMax(contentSize->width(), d->itemWidth(child.item) + padding));
 
-        voffset += child.item->height();
+        voffset += d->itemHeight(child.item);
         voffset += spacing();
     }
 
@@ -1137,7 +1148,7 @@ public:
         : QQuickBasePositionerPrivate()
     {}
 
-    void effectiveLayoutDirectionChange()
+    void effectiveLayoutDirectionChange() override
     {
         Q_Q(QQuickRow);
         // For RTL layout the positioning changes when the width changes.
@@ -1225,9 +1236,9 @@ void QQuickRow::doPositioning(QSizeF *contentSize)
             hoffsets << hoffset;
         }
 
-        contentSize->setHeight(qMax(contentSize->height(), child.item->height() + padding));
+        contentSize->setHeight(qMax(contentSize->height(), d->itemHeight(child.item) + padding));
 
-        hoffset += child.item->width();
+        hoffset += d->itemWidth(child.item);
         hoffset += spacing();
     }
 
@@ -1248,7 +1259,7 @@ void QQuickRow::doPositioning(QSizeF *contentSize)
     int acc = 0;
     for (int ii = 0; ii < positionedItems.count(); ++ii) {
         PositionedItem &child = positionedItems[ii];
-        hoffset = end - hoffsets[acc++] - child.item->width();
+        hoffset = end - hoffsets[acc++] - d->itemWidth(child.item);
         positionItem(hoffset, child.itemY() + topPadding() - child.topPadding, &child);
         child.updatePadding(leftPadding(), topPadding(), rightPadding(), bottomPadding());
     }
@@ -1436,7 +1447,7 @@ public:
         : QQuickBasePositionerPrivate()
     {}
 
-    void effectiveLayoutDirectionChange()
+    void effectiveLayoutDirectionChange() override
     {
         Q_Q(QQuickGrid);
         // For RTL layout the positioning changes when the width changes.
@@ -1749,10 +1760,12 @@ void QQuickGrid::doPositioning(QSizeF *contentSize)
                     break;
 
                 const PositionedItem &child = positionedItems.at(childIndex++);
-                if (child.item->width() > maxColWidth[j])
-                    maxColWidth[j] = child.item->width();
-                if (child.item->height() > maxRowHeight[i])
-                    maxRowHeight[i] = child.item->height();
+                const qreal childWidth = d->itemWidth(child.item);
+                const qreal childHeight = d->itemHeight(child.item);
+                if (childWidth > maxColWidth[j])
+                    maxColWidth[j] = childWidth;
+                if (childHeight > maxRowHeight[i])
+                    maxRowHeight[i] = childHeight;
             }
         }
     } else {
@@ -1767,10 +1780,12 @@ void QQuickGrid::doPositioning(QSizeF *contentSize)
                     break;
 
                 const PositionedItem &child = positionedItems.at(childIndex++);
-                if (child.item->width() > maxColWidth[j])
-                    maxColWidth[j] = child.item->width();
-                if (child.item->height() > maxRowHeight[i])
-                    maxRowHeight[i] = child.item->height();
+                const qreal childWidth = d->itemWidth(child.item);
+                const qreal childHeight = d->itemHeight(child.item);
+                if (childWidth > maxColWidth[j])
+                    maxColWidth[j] = childWidth;
+                if (childHeight > maxRowHeight[i])
+                    maxRowHeight[i] = childHeight;
             }
         }
     }
@@ -1812,20 +1827,22 @@ void QQuickGrid::doPositioning(QSizeF *contentSize)
     for (int i = 0; i < positionedItems.count(); ++i) {
         PositionedItem &child = positionedItems[i];
         qreal childXOffset = xoffset;
+        const qreal childWidth = d->itemWidth(child.item);
+        const qreal childHeight = d->itemHeight(child.item);
 
         if (effectiveHAlign() == AlignRight)
-            childXOffset += maxColWidth[curCol] - child.item->width();
+            childXOffset += maxColWidth[curCol] - childWidth;
         else if (hItemAlign() == AlignHCenter)
-            childXOffset += (maxColWidth[curCol] - child.item->width())/2.0;
+            childXOffset += (maxColWidth[curCol] - childWidth)/2.0;
 
         if (!d->isLeftToRight())
             childXOffset -= maxColWidth[curCol];
 
         qreal alignYOffset = yoffset;
         if (m_vItemAlign == AlignVCenter)
-            alignYOffset += (maxRowHeight[curRow] - child.item->height())/2.0;
+            alignYOffset += (maxRowHeight[curRow] - childHeight)/2.0;
         else if (m_vItemAlign == AlignBottom)
-            alignYOffset += maxRowHeight[curRow] - child.item->height();
+            alignYOffset += maxRowHeight[curRow] - childHeight;
 
         positionItem(childXOffset, alignYOffset, &child);
         child.updatePadding(leftPadding(), topPadding(), rightPadding(), bottomPadding());
@@ -2023,7 +2040,7 @@ public:
         : QQuickBasePositionerPrivate(), flow(QQuickFlow::LeftToRight)
     {}
 
-    void effectiveLayoutDirectionChange()
+    void effectiveLayoutDirectionChange() override
     {
         Q_Q(QQuickFlow);
         // Don't postpone, as it might be the only trigger for visible changes.
@@ -2143,15 +2160,17 @@ void QQuickFlow::doPositioning(QSizeF *contentSize)
 
     for (int i = 0; i < positionedItems.count(); ++i) {
         PositionedItem &child = positionedItems[i];
+        const qreal childWidth = d->itemWidth(child.item);
+        const qreal childHeight = d->itemHeight(child.item);
 
         if (d->flow == LeftToRight)  {
-            if (widthValid() && hoffset != hoffset1 && hoffset + child.item->width() + hoffset2 > width()) {
+            if (widthValid() && hoffset != hoffset1 && hoffset + childWidth + hoffset2 > width()) {
                 hoffset = hoffset1;
                 voffset += linemax + spacing();
                 linemax = 0;
             }
         } else {
-            if (heightValid() && voffset != voffset1 && voffset + child.item->height() + bottomPadding() > height()) {
+            if (heightValid() && voffset != voffset1 && voffset + childHeight + bottomPadding() > height()) {
                 voffset = voffset1;
                 hoffset += linemax + spacing();
                 linemax = 0;
@@ -2168,17 +2187,17 @@ void QQuickFlow::doPositioning(QSizeF *contentSize)
             child.bottomPadding = bottomPadding();
         }
 
-        contentSize->setWidth(qMax(contentSize->width(), hoffset + child.item->width() + hoffset2));
-        contentSize->setHeight(qMax(contentSize->height(), voffset + child.item->height() + bottomPadding()));
+        contentSize->setWidth(qMax(contentSize->width(), hoffset + childWidth + hoffset2));
+        contentSize->setHeight(qMax(contentSize->height(), voffset + childHeight + bottomPadding()));
 
         if (d->flow == LeftToRight)  {
-            hoffset += child.item->width();
+            hoffset += childWidth;
             hoffset += spacing();
-            linemax = qMax(linemax, child.item->height());
+            linemax = qMax(linemax, childHeight);
         } else {
-            voffset += child.item->height();
+            voffset += childHeight;
             voffset += spacing();
-            linemax = qMax(linemax, child.item->width());
+            linemax = qMax(linemax, childWidth);
         }
     }
 
@@ -2193,7 +2212,7 @@ void QQuickFlow::doPositioning(QSizeF *contentSize)
     int acc = 0;
     for (int i = 0; i < positionedItems.count(); ++i) {
         PositionedItem &child = positionedItems[i];
-        hoffset = end - hoffsets[acc++] - child.item->width();
+        hoffset = end - hoffsets[acc++] - d->itemWidth(child.item);
         positionItemX(hoffset, &child);
         child.leftPadding = leftPadding();
         child.rightPadding = rightPadding();
@@ -2217,4 +2236,18 @@ void QQuickFlow::reportConflictingAnchors()
         qmlWarning(this) << "Cannot specify anchors for items inside Flow." << " Flow will not function.";
 }
 
+QQuickImplicitRow::QQuickImplicitRow(QQuickItem *parent)
+    : QQuickRow(parent)
+{
+    QQuickBasePositionerPrivate *d = QQuickBasePositioner::get(this);
+    d->useImplicitSize = true;
+}
+
+QQuickImplicitGrid::QQuickImplicitGrid(QQuickItem *parent)
+    : QQuickGrid(parent)
+{
+    QQuickBasePositionerPrivate *d = QQuickBasePositioner::get(this);
+    d->useImplicitSize = true;
+}
+
 QT_END_NAMESPACE
diff --git a/src/quick/items/qquickpositioners_p.h b/src/quick/items/qquickpositioners_p.h
index ae6e795794..8dc0d90a2f 100644
--- a/src/quick/items/qquickpositioners_p.h
+++ b/src/quick/items/qquickpositioners_p.h
@@ -58,7 +58,6 @@ QT_REQUIRE_CONFIG(quick_positioners);
 #include "qquickimplicitsizeitem_p.h"
 #include "qquickitemviewtransition_p.h"
 
-#include <QtQuick/private/qquickstate_p.h>
 #include <private/qpodvector_p.h>
 
 #include <QtCore/qobject.h>
@@ -133,6 +132,11 @@ public:
 
     static QQuickPositionerAttached *qmlAttachedProperties(QObject *obj);
 
+    static QQuickBasePositionerPrivate* get(QQuickBasePositioner *positioner)
+    {
+        return positioner->d_func();
+    }
+
     void updateAttachedProperties(QQuickPositionerAttached *specificProperty = 0, QQuickItem *specificPropertyOwner = 0) const;
 
     qreal padding() const;
@@ -183,7 +187,7 @@ protected:
     virtual void doPositioning(QSizeF *contentSize)=0;
     virtual void reportConflictingAnchors()=0;
 
-    class PositionedItem
+    class Q_QUICK_PRIVATE_EXPORT PositionedItem
     {
     public :
         PositionedItem(QQuickItem *i);
@@ -228,7 +232,7 @@ private:
     Q_DECLARE_PRIVATE(QQuickBasePositioner)
 };
 
-class Q_AUTOTEST_EXPORT QQuickColumn : public QQuickBasePositioner
+class Q_QUICK_PRIVATE_EXPORT QQuickColumn : public QQuickBasePositioner
 {
     Q_OBJECT
 public:
@@ -242,7 +246,7 @@ private:
 };
 
 class QQuickRowPrivate;
-class Q_AUTOTEST_EXPORT QQuickRow: public QQuickBasePositioner
+class Q_QUICK_PRIVATE_EXPORT QQuickRow: public QQuickBasePositioner
 {
     Q_OBJECT
     Q_PROPERTY(Qt::LayoutDirection layoutDirection READ layoutDirection WRITE setLayoutDirection NOTIFY layoutDirectionChanged)
@@ -267,7 +271,7 @@ private:
 };
 
 class QQuickGridPrivate;
-class Q_AUTOTEST_EXPORT QQuickGrid : public QQuickBasePositioner
+class Q_QUICK_PRIVATE_EXPORT QQuickGrid : public QQuickBasePositioner
 {
     Q_OBJECT
     Q_PROPERTY(int rows READ rows WRITE setRows NOTIFY rowsChanged)
@@ -354,7 +358,7 @@ private:
 };
 
 class QQuickFlowPrivate;
-class Q_AUTOTEST_EXPORT QQuickFlow: public QQuickBasePositioner
+class Q_QUICK_PRIVATE_EXPORT QQuickFlow: public QQuickBasePositioner
 {
     Q_OBJECT
     Q_PROPERTY(Flow flow READ flow WRITE setFlow NOTIFY flowChanged)
@@ -387,6 +391,22 @@ private:
     Q_DECLARE_PRIVATE(QQuickFlow)
 };
 
+class Q_QUICK_PRIVATE_EXPORT QQuickImplicitRow : public QQuickRow
+{
+    Q_OBJECT
+
+public:
+    QQuickImplicitRow(QQuickItem *parent = nullptr);
+};
+
+class Q_QUICK_PRIVATE_EXPORT QQuickImplicitGrid : public QQuickGrid
+{
+    Q_OBJECT
+
+public:
+    QQuickImplicitGrid(QQuickItem *parent = nullptr);
+};
+
 
 QT_END_NAMESPACE
 
@@ -394,6 +414,8 @@ QML_DECLARE_TYPE(QQuickColumn)
 QML_DECLARE_TYPE(QQuickRow)
 QML_DECLARE_TYPE(QQuickGrid)
 QML_DECLARE_TYPE(QQuickFlow)
+QML_DECLARE_TYPE(QQuickImplicitRow)
+QML_DECLARE_TYPE(QQuickImplicitGrid)
 
 QML_DECLARE_TYPE(QQuickBasePositioner)
 QML_DECLARE_TYPEINFO(QQuickBasePositioner, QML_HAS_ATTACHED_PROPERTIES)
diff --git a/src/quick/items/qquickpositioners_p_p.h b/src/quick/items/qquickpositioners_p_p.h
index 6dd84e6098..1a7051615c 100644
--- a/src/quick/items/qquickpositioners_p_p.h
+++ b/src/quick/items/qquickpositioners_p_p.h
@@ -58,9 +58,6 @@ QT_REQUIRE_CONFIG(quick_positioners);
 #include "qquickpositioners_p.h"
 #include "qquickimplicitsizeitem_p_p.h"
 
-#include <QtQuick/private/qquickstate_p.h>
-#include <private/qquicktransitionmanager_p_p.h>
-#include <private/qquickstatechangescript_p.h>
 #include <private/qlazilyallocated_p.h>
 
 #include <QtCore/qobject.h>
@@ -92,10 +89,14 @@ public:
     QLazilyAllocated<ExtraData> extra;
 
     QQuickBasePositionerPrivate()
-        : spacing(0), type(QQuickBasePositioner::None)
-        , transitioner(0), positioningDirty(false)
-        , doingPositioning(false), anchorConflict(false), layoutDirection(Qt::LeftToRight)
-
+        : spacing(0)
+        , type(QQuickBasePositioner::None)
+        , transitioner(0)
+        , positioningDirty(false)
+        , doingPositioning(false)
+        , anchorConflict(false)
+        , useImplicitSize(false)
+        , layoutDirection(Qt::LeftToRight)
     {
     }
 
@@ -122,6 +123,7 @@ public:
     bool positioningDirty : 1;
     bool doingPositioning : 1;
     bool anchorConflict : 1;
+    bool useImplicitSize : 1;
 
     Qt::LayoutDirection layoutDirection;
 
@@ -177,6 +179,34 @@ public:
     {
     }
 
+    void itemImplicitWidthChanged(QQuickItem *) override
+    {
+        Q_ASSERT(useImplicitSize);
+        setPositioningDirty();
+    }
+
+    void itemImplicitHeightChanged(QQuickItem *) override
+    {
+        Q_ASSERT(useImplicitSize);
+        setPositioningDirty();
+    }
+
+    qreal itemWidth(QQuickItem *item) const
+    {
+        if (Q_LIKELY(!useImplicitSize))
+            return item->width();
+
+        return item->implicitWidth();
+    }
+
+    qreal itemHeight(QQuickItem *item) const
+    {
+        if (Q_LIKELY(!useImplicitSize))
+            return item->height();
+
+        return item->implicitHeight();
+    }
+
     inline qreal padding() const { return extra.isAllocated() ? extra->padding : 0.0; }
     void setTopPadding(qreal value, bool reset = false);
     void setLeftPadding(qreal value, bool reset = false);
diff --git a/src/quick/items/qquickscreen.cpp b/src/quick/items/qquickscreen.cpp
index 9347b55c70..20c6973ee1 100644
--- a/src/quick/items/qquickscreen.cpp
+++ b/src/quick/items/qquickscreen.cpp
@@ -207,9 +207,9 @@ QT_BEGIN_NAMESPACE
     By default it is set to the value of the QScreen that the window uses.
 */
 
-QQuickScreenInfo::QQuickScreenInfo(QObject *parent)
-    : QObject(parent),
-      m_screen(nullptr)
+QQuickScreenInfo::QQuickScreenInfo(QObject *parent, QScreen *wrappedScreen)
+    : QObject(parent)
+    , m_screen(wrappedScreen)
 {
 }
 
diff --git a/src/quick/items/qquickscreen_p.h b/src/quick/items/qquickscreen_p.h
index 06efb3ab45..99e1466631 100644
--- a/src/quick/items/qquickscreen_p.h
+++ b/src/quick/items/qquickscreen_p.h
@@ -84,7 +84,7 @@ class Q_AUTOTEST_EXPORT QQuickScreenInfo : public QObject
     Q_PROPERTY(int virtualY READ virtualY NOTIFY virtualYChanged REVISION 1)
 
 public:
-    QQuickScreenInfo(QObject *parent = nullptr);
+    QQuickScreenInfo(QObject *parent = nullptr, QScreen *wrappedScreen = nullptr);
 
     QString name() const;
     int width() const;
diff --git a/src/quick/items/qquickshadereffectsource.cpp b/src/quick/items/qquickshadereffectsource.cpp
index 1b37a746d3..c782ddb5f7 100644
--- a/src/quick/items/qquickshadereffectsource.cpp
+++ b/src/quick/items/qquickshadereffectsource.cpp
@@ -189,6 +189,7 @@ QQuickShaderEffectSource::QQuickShaderEffectSource(QQuickItem *parent)
     , m_sourceItem(0)
     , m_textureSize(0, 0)
     , m_format(RGBA)
+    , m_samples(0)
     , m_live(true)
     , m_hideSource(false)
     , m_mipmap(false)
@@ -582,6 +583,44 @@ void QQuickShaderEffectSource::setTextureMirroring(TextureMirroring mirroring)
 }
 
 /*!
+    \qmlproperty int QtQuick::ShaderEffectSource::samples
+    \since 5.10
+
+    This property allows requesting multisampled rendering.
+
+    By default multisampling is enabled whenever multisampling is enabled for
+    the entire window, assuming the scenegraph renderer in use and the
+    underlying graphics API supports this.
+
+    By setting the value to 2, 4, etc. multisampled rendering can be requested
+    for a part of the scene without enabling multisampling for the entire
+    scene. This way multisampling is applied only to a given subtree, which can
+    lead to significant performance gains since multisampling is not applied to
+    other parts of the scene.
+
+    \note Enabling multisampling can be potentially expensive regardless of the
+    layer's size, as it incurs a hardware and driver dependent performance and
+    memory cost.
+
+    \note This property is only functional when support for multisample
+    renderbuffers and framebuffer blits is available. Otherwise the value is
+    silently ignored.
+ */
+int QQuickShaderEffectSource::samples() const
+{
+    return m_samples;
+}
+
+void QQuickShaderEffectSource::setSamples(int count)
+{
+    if (count == m_samples)
+        return;
+    m_samples = count;
+    update();
+    emit samplesChanged();
+}
+
+/*!
     \qmlmethod QtQuick::ShaderEffectSource::scheduleUpdate()
 
     Schedules a re-rendering of the texture for the next frame.
@@ -683,6 +722,7 @@ QSGNode *QQuickShaderEffectSource::updatePaintNode(QSGNode *oldNode, UpdatePaint
     m_texture->setHasMipmaps(m_mipmap);
     m_texture->setMirrorHorizontal(m_textureMirroring & MirrorHorizontally);
     m_texture->setMirrorVertical(m_textureMirroring & MirrorVertically);
+    m_texture->setSamples(m_samples);
 
     if (m_grab)
         m_texture->scheduleUpdate();
diff --git a/src/quick/items/qquickshadereffectsource_p.h b/src/quick/items/qquickshadereffectsource_p.h
index 5e7e354feb..d9f9079a3d 100644
--- a/src/quick/items/qquickshadereffectsource_p.h
+++ b/src/quick/items/qquickshadereffectsource_p.h
@@ -88,6 +88,7 @@ class Q_QUICK_PRIVATE_EXPORT QQuickShaderEffectSource : public QQuickItem, publi
     Q_PROPERTY(bool mipmap READ mipmap WRITE setMipmap NOTIFY mipmapChanged)
     Q_PROPERTY(bool recursive READ recursive WRITE setRecursive NOTIFY recursiveChanged)
     Q_PROPERTY(TextureMirroring textureMirroring READ textureMirroring WRITE setTextureMirroring NOTIFY textureMirroringChanged REVISION 1)
+    Q_PROPERTY(int samples READ samples WRITE setSamples NOTIFY samplesChanged REVISION 2)
 
 public:
     enum WrapMode {
@@ -150,6 +151,9 @@ public:
 
     Q_INVOKABLE void scheduleUpdate();
 
+    int samples() const;
+    void setSamples(int count);
+
 Q_SIGNALS:
     void wrapModeChanged();
     void sourceItemChanged();
@@ -161,6 +165,7 @@ Q_SIGNALS:
     void mipmapChanged();
     void recursiveChanged();
     void textureMirroringChanged();
+    void samplesChanged();
 
     void scheduledUpdateCompleted();
 
@@ -185,6 +190,7 @@ private:
     QRectF m_sourceRect;
     QSize m_textureSize;
     Format m_format;
+    int m_samples;
     uint m_live : 1;
     uint m_hideSource : 1;
     uint m_mipmap : 1;
diff --git a/src/quick/items/qquicktext.cpp b/src/quick/items/qquicktext.cpp
index 965fb0102f..1720377046 100644
--- a/src/quick/items/qquicktext.cpp
+++ b/src/quick/items/qquicktext.cpp
@@ -74,7 +74,7 @@ Q_DECLARE_LOGGING_CATEGORY(DBG_HOVER_TRACE)
 const QChar QQuickTextPrivate::elideChar = QChar(0x2026);
 
 QQuickTextPrivate::QQuickTextPrivate()
-    : elideLayout(0), textLine(0), lineWidth(0)
+    : fontInfo(font), elideLayout(0), textLine(0), lineWidth(0)
     , color(0xFF000000), linkColor(0xFF0000FF), styleColor(0xFF000000)
     , lineCount(1), multilengthEos(-1)
     , elideMode(QQuickText::ElideNone), hAlign(QQuickText::AlignLeft), vAlign(QQuickText::AlignTop)
@@ -1018,6 +1018,17 @@ QRectF QQuickTextPrivate::setupTextLayout(qreal *const baseline)
     implicitWidthValid = true;
     implicitHeightValid = true;
 
+    QFontInfo scaledFontInfo(scaledFont);
+    if (fontInfo.weight() != scaledFontInfo.weight()
+            || fontInfo.pixelSize() != scaledFontInfo.pixelSize()
+            || fontInfo.italic() != scaledFontInfo.italic()
+            || !qFuzzyCompare(fontInfo.pointSizeF(), scaledFontInfo.pointSizeF())
+            || fontInfo.family() != scaledFontInfo.family()
+            || fontInfo.styleName() != scaledFontInfo.styleName()) {
+        fontInfo = scaledFontInfo;
+        emit q->fontInfoChanged();
+    }
+
     if (eos != multilengthEos)
         truncated = true;
 
@@ -2974,4 +2985,80 @@ void QQuickText::resetBottomPadding()
     d->setBottomPadding(0, true);
 }
 
+/*!
+    \qmlproperty string QtQuick::Text::fontInfo.family
+    \since 5.9
+
+    The family name of the font that has been resolved for the current font
+    and fontSizeMode.
+*/
+
+/*!
+    \qmlproperty string QtQuick::Text::fontInfo.styleName
+    \since 5.9
+
+    The style name of the font info that has been resolved for the current font
+    and fontSizeMode.
+*/
+
+/*!
+    \qmlproperty bool QtQuick::Text::fontInfo.bold
+    \since 5.9
+
+    The bold state of the font info that has been resolved for the current font
+    and fontSizeMode. This is true if the weight of the resolved font is bold or higher.
+*/
+
+/*!
+    \qmlproperty int QtQuick::Text::fontInfo.weight
+    \since 5.9
+
+    The weight of the font info that has been resolved for the current font
+    and fontSizeMode.
+*/
+
+/*!
+    \qmlproperty bool QtQuick::Text::fontInfo.italic
+    \since 5.9
+
+    The italic state of the font info that has been resolved for the current font
+    and fontSizeMode.
+*/
+
+/*!
+    \qmlproperty real QtQuick::Text::fontInfo.pointSize
+    \since 5.9
+
+    The pointSize of the font info that has been resolved for the current font
+    and fontSizeMode.
+*/
+
+/*!
+    \qmlproperty string QtQuick::Text::fontInfo.pixelSize
+    \since 5.9
+
+    The pixel size of the font info that has been resolved for the current font
+    and fontSizeMode.
+*/
+QJSValue QQuickText::fontInfo() const
+{
+    Q_D(const QQuickText);
+
+    QJSEngine *engine = qjsEngine(this);
+    if (!engine) {
+        qmlWarning(this) << "fontInfo: item has no JS engine";
+        return QJSValue();
+    }
+
+    QJSValue value = engine->newObject();
+    value.setProperty(QStringLiteral("family"), d->fontInfo.family());
+    value.setProperty(QStringLiteral("styleName"), d->fontInfo.styleName());
+    value.setProperty(QStringLiteral("bold"), d->fontInfo.bold());
+    value.setProperty(QStringLiteral("weight"), d->fontInfo.weight());
+    value.setProperty(QStringLiteral("italic"), d->fontInfo.italic());
+    value.setProperty(QStringLiteral("pointSize"), d->fontInfo.pointSizeF());
+    value.setProperty(QStringLiteral("pixelSize"), d->fontInfo.pixelSize());
+    return value;
+}
+
 QT_END_NAMESPACE
diff --git a/src/quick/items/qquicktext_p.h b/src/quick/items/qquicktext_p.h
index c3d3906e7e..b190738cfb 100644
--- a/src/quick/items/qquicktext_p.h
+++ b/src/quick/items/qquicktext_p.h
@@ -98,6 +98,8 @@ class Q_QUICK_PRIVATE_EXPORT QQuickText : public QQuickImplicitSizeItem
     Q_PROPERTY(qreal rightPadding READ rightPadding WRITE setRightPadding RESET resetRightPadding NOTIFY rightPaddingChanged REVISION 6)
     Q_PROPERTY(qreal bottomPadding READ bottomPadding WRITE setBottomPadding RESET resetBottomPadding NOTIFY bottomPaddingChanged REVISION 6)
 
+    Q_PROPERTY(QJSValue fontInfo READ fontInfo NOTIFY fontInfoChanged REVISION 9)
+
 public:
     QQuickText(QQuickItem *parent=0);
     ~QQuickText();
@@ -248,6 +250,8 @@ public:
     void setBottomPadding(qreal padding);
     void resetBottomPadding();
 
+    QJSValue fontInfo() const;
+
 Q_SIGNALS:
     void textChanged(const QString &text);
     void linkActivated(const QString &link);
@@ -280,6 +284,7 @@ Q_SIGNALS:
     Q_REVISION(6) void leftPaddingChanged();
     Q_REVISION(6) void rightPaddingChanged();
     Q_REVISION(6) void bottomPaddingChanged();
+    Q_REVISION(9) void fontInfoChanged();
 
 protected:
     QQuickText(QQuickTextPrivate &dd, QQuickItem *parent = 0);
diff --git a/src/quick/items/qquicktext_p_p.h b/src/quick/items/qquicktext_p_p.h
index 0669bcf115..6456750359 100644
--- a/src/quick/items/qquicktext_p_p.h
+++ b/src/quick/items/qquicktext_p_p.h
@@ -122,6 +122,7 @@ public:
     QString text;
     QFont font;
     QFont sourceFont;
+    QFontInfo fontInfo;
 
     QTextLayout layout;
     QTextLayout *elideLayout;
diff --git a/src/quick/items/qquickwindow.cpp b/src/quick/items/qquickwindow.cpp
index 660c5f8067..57810e4ec9 100644
--- a/src/quick/items/qquickwindow.cpp
+++ b/src/quick/items/qquickwindow.cpp
@@ -453,8 +453,13 @@ void QQuickWindowPrivate::renderSceneGraph(const QSize &size)
             fboId = renderTargetId;
             renderer->setDeviceRect(rect);
             renderer->setViewportRect(rect);
-            renderer->setProjectionMatrixToRect(QRect(QPoint(0, 0), rect.size()));
-            renderer->setDevicePixelRatio(1);
+            if (QQuickRenderControl::renderWindowFor(q)) {
+                renderer->setProjectionMatrixToRect(QRect(QPoint(0, 0), size));
+                renderer->setDevicePixelRatio(devicePixelRatio);
+            } else {
+                renderer->setProjectionMatrixToRect(QRect(QPoint(0, 0), rect.size()));
+                renderer->setDevicePixelRatio(1);
+            }
         } else {
             QRect rect(QPoint(0, 0), devicePixelRatio * size);
             renderer->setDeviceRect(rect);
@@ -1798,7 +1803,7 @@ bool QQuickWindowPrivate::deliverWheelEvent(QQuickItem *item, QWheelEvent *event
     QPointF p = item->mapFromScene(event->posF());
 
     if (item->contains(p)) {
-        QWheelEvent wheel(p, p, event->pixelDelta(), event->angleDelta(), event->delta(),
+        QWheelEvent wheel(p, event->globalPosF(), event->pixelDelta(), event->angleDelta(), event->delta(),
                           event->orientation(), event->buttons(), event->modifiers(), event->phase(), event->source(), event->inverted());
         wheel.setTimestamp(event->timestamp());
         wheel.accept();
@@ -4167,25 +4172,25 @@ void QQuickWindow::resetOpenGLState()
  */
 
 /*!
-    \qmlproperty variant Window::targetScreen
-
-    Specifies the screen the window should be placed on. Equivalent to
-    QWindow::setScreen().
+    \qmlproperty variant Window::screen
 
-    The value must be an element from the Qt.application.screens array.
+    The screen with which the window is associated.
 
-    By default the value is null which leads to using the primary screen.
+    If specified before showing a window, will result in the window being shown
+    on that screen, unless an explicit window position has been set. The value
+    must be an element from the Qt.application.screens array.
 
-    \note To ensure that the window is associated with the desired screen right
-    upon the underlying native window's initial creation, make sure this
-    property is set as early as possible and that the setting of its value is
-    not deferred. This can be particularly important on embedded platforms
-    without a windowing system, where only one window per screen is allowed at a
-    time.
+    \note To ensure that the window is associated with the desired screen when
+    the underlying native window is created, make sure this property is set as
+    early as possible and that the setting of its value is not deferred. This
+    can be particularly important on embedded platforms without a windowing system,
+    where only one window per screen is allowed at a time. Setting the screen after
+    a window has been created does not move the window if the new screen is part of
+    the same virtual desktop as the old screen.
 
     \since 5.9
 
-    \sa QWindow::setScreen(), QScreen, Qt.application
+    \sa QWindow::setScreen(), QWindow::screen(), QScreen, Qt.application
  */
 
 /*!
diff --git a/src/quick/items/qquickwindowmodule.cpp b/src/quick/items/qquickwindowmodule.cpp
index 42313e4584..6211b7802f 100644
--- a/src/quick/items/qquickwindowmodule.cpp
+++ b/src/quick/items/qquickwindowmodule.cpp
@@ -59,7 +59,6 @@ public:
         : complete(false)
         , visible(false)
         , visibility(QQuickWindow::AutomaticVisibility)
-        , targetScreen(nullptr)
     {
     }
 
@@ -67,7 +66,6 @@ public:
     bool visible;
     QQuickWindow::Visibility visibility;
     QV4::PersistentValue rootItemMarker;
-    QObject *targetScreen;
 };
 
 QQuickWindowQmlImpl::QQuickWindowQmlImpl(QWindow *parent)
@@ -75,6 +73,7 @@ QQuickWindowQmlImpl::QQuickWindowQmlImpl(QWindow *parent)
 {
     connect(this, &QWindow::visibleChanged, this, &QQuickWindowQmlImpl::visibleChanged);
     connect(this, &QWindow::visibilityChanged, this, &QQuickWindowQmlImpl::visibilityChanged);
+    connect(this, &QWindow::screenChanged, this, &QQuickWindowQmlImpl::screenChanged);
 }
 
 void QQuickWindowQmlImpl::setVisible(bool visible)
@@ -175,24 +174,15 @@ void QQuickWindowQmlImpl::setWindowVisibility()
     }
 }
 
-QObject *QQuickWindowQmlImpl::targetScreen() const
+QObject *QQuickWindowQmlImpl::screen() const
 {
-    Q_D(const QQuickWindowQmlImpl);
-    return d->targetScreen;
+    return new QQuickScreenInfo(const_cast<QQuickWindowQmlImpl *>(this), QWindow::screen());
 }
 
-void QQuickWindowQmlImpl::setTargetScreen(QObject *screen)
+void QQuickWindowQmlImpl::setScreen(QObject *screen)
 {
-    Q_D(QQuickWindowQmlImpl);
-    if (d->targetScreen != screen) {
-        d->targetScreen = screen;
-        emit targetScreenChanged();
-        QQuickScreenInfo *screenWrapper = qobject_cast<QQuickScreenInfo *>(screen);
-        if (screenWrapper)
-            setScreen(screenWrapper->wrappedScreen());
-        else
-            setScreen(nullptr);
-    }
+    QQuickScreenInfo *screenWrapper = qobject_cast<QQuickScreenInfo *>(screen);
+    QWindow::setScreen(screenWrapper ? screenWrapper->wrappedScreen() : nullptr);
 }
 
 void QQuickWindowModule::defineModule()
diff --git a/src/quick/items/qquickwindowmodule_p.h b/src/quick/items/qquickwindowmodule_p.h
index 7ca29880ea..16130bc8a0 100644
--- a/src/quick/items/qquickwindowmodule_p.h
+++ b/src/quick/items/qquickwindowmodule_p.h
@@ -67,7 +67,7 @@ class Q_QUICK_PRIVATE_EXPORT QQuickWindowQmlImpl : public QQuickWindow, public Q
 
     Q_PROPERTY(bool visible READ isVisible WRITE setVisible NOTIFY visibleChanged)
     Q_PROPERTY(Visibility visibility READ visibility WRITE setVisibility NOTIFY visibilityChanged)
-    Q_PROPERTY(QObject *targetScreen READ targetScreen WRITE setTargetScreen NOTIFY targetScreenChanged REVISION 2)
+    Q_PROPERTY(QObject *screen READ screen WRITE setScreen NOTIFY screenChanged REVISION 2)
 
 public:
     QQuickWindowQmlImpl(QWindow *parent = Q_NULLPTR);
@@ -75,15 +75,15 @@ public:
     void setVisible(bool visible);
     void setVisibility(Visibility visibility);
 
-    QObject *targetScreen() const;
-    void setTargetScreen(QObject *screen);
+    QObject *screen() const;
+    void setScreen(QObject *screen);
 
     static QQuickWindowAttached *qmlAttachedProperties(QObject *object);
 
 Q_SIGNALS:
     void visibleChanged(bool arg);
     void visibilityChanged(QWindow::Visibility visibility);
-    Q_REVISION(2) void targetScreenChanged();
+    Q_REVISION(2) void screenChanged();
 
 protected:
     void classBegin() Q_DECL_OVERRIDE;
diff --git a/src/quick/scenegraph/adaptations/software/qsgsoftwarelayer_p.h b/src/quick/scenegraph/adaptations/software/qsgsoftwarelayer_p.h
index d3f13e40b1..9f5a22e66f 100644
--- a/src/quick/scenegraph/adaptations/software/qsgsoftwarelayer_p.h
+++ b/src/quick/scenegraph/adaptations/software/qsgsoftwarelayer_p.h
@@ -93,6 +93,7 @@ public:
     void setDevicePixelRatio(qreal ratio) override;
     void setMirrorHorizontal(bool mirror) override;
     void setMirrorVertical(bool mirror) override;
+    void setSamples(int) override { }
 
 public slots:
     void markDirtyTexture() override;
diff --git a/src/quick/scenegraph/adaptations/software/qsgsoftwarepixmaprenderer.cpp b/src/quick/scenegraph/adaptations/software/qsgsoftwarepixmaprenderer.cpp
index f8c1a3d90b..ad6cf39425 100644
--- a/src/quick/scenegraph/adaptations/software/qsgsoftwarepixmaprenderer.cpp
+++ b/src/quick/scenegraph/adaptations/software/qsgsoftwarepixmaprenderer.cpp
@@ -64,7 +64,7 @@ void QSGSoftwarePixmapRenderer::renderScene(uint)
     class B : public QSGBindable
     {
     public:
-        void bind() const { }
+        void bind() const override { }
     } bindable;
     QSGRenderer::renderScene(bindable);
 }
diff --git a/src/quick/scenegraph/adaptations/software/qsgsoftwarepublicnodes.cpp b/src/quick/scenegraph/adaptations/software/qsgsoftwarepublicnodes.cpp
index 1fa5234377..d754089ce4 100644
--- a/src/quick/scenegraph/adaptations/software/qsgsoftwarepublicnodes.cpp
+++ b/src/quick/scenegraph/adaptations/software/qsgsoftwarepublicnodes.cpp
@@ -98,10 +98,10 @@ void QSGSoftwareImageNode::paint(QPainter *painter)
 
     if (!m_cachedPixmap.isNull()) {
         painter->drawPixmap(m_rect, m_cachedPixmap, m_sourceRect);
-    } else if (QSGSoftwarePixmapTexture *pt = dynamic_cast<QSGSoftwarePixmapTexture *>(m_texture)) {
+    } else if (QSGSoftwarePixmapTexture *pt = qobject_cast<QSGSoftwarePixmapTexture *>(m_texture)) {
         const QPixmap &pm = pt->pixmap();
         painter->drawPixmap(m_rect, pm, m_sourceRect);
-    } else if (QSGPlainTexture *pt = dynamic_cast<QSGPlainTexture *>(m_texture)) {
+    } else if (QSGPlainTexture *pt = qobject_cast<QSGPlainTexture *>(m_texture)) {
         const QImage &im = pt->image();
         painter->drawImage(m_rect, im, m_sourceRect);
     }
@@ -113,14 +113,14 @@ void QSGSoftwareImageNode::updateCachedMirroredPixmap()
         m_cachedPixmap = QPixmap();
     } else {
 
-        if (QSGSoftwarePixmapTexture *pt = dynamic_cast<QSGSoftwarePixmapTexture *>(m_texture)) {
+        if (QSGSoftwarePixmapTexture *pt = qobject_cast<QSGSoftwarePixmapTexture *>(m_texture)) {
             QTransform mirrorTransform;
             if (m_transformMode.testFlag(MirrorVertically))
                 mirrorTransform = mirrorTransform.scale(1, -1);
             if (m_transformMode.testFlag(MirrorHorizontally))
                 mirrorTransform = mirrorTransform.scale(-1, 1);
             m_cachedPixmap = pt->pixmap().transformed(mirrorTransform);
-        } else if (QSGPlainTexture *pt = dynamic_cast<QSGPlainTexture *>(m_texture)) {
+        } else if (QSGPlainTexture *pt = qobject_cast<QSGPlainTexture *>(m_texture)) {
             m_cachedPixmap = QPixmap::fromImage(pt->image().mirrored(m_transformMode.testFlag(MirrorHorizontally), m_transformMode.testFlag(MirrorVertically)));
         } else {
             m_cachedPixmap = QPixmap();
diff --git a/src/quick/scenegraph/adaptations/software/qsgsoftwarerenderablenode.cpp b/src/quick/scenegraph/adaptations/software/qsgsoftwarerenderablenode.cpp
index 7adb39d9a8..f67e2106c8 100644
--- a/src/quick/scenegraph/adaptations/software/qsgsoftwarerenderablenode.cpp
+++ b/src/quick/scenegraph/adaptations/software/qsgsoftwarerenderablenode.cpp
@@ -296,10 +296,10 @@ QRegion QSGSoftwareRenderableNode::renderNode(QPainter *painter, bool forceOpaqu
     case QSGSoftwareRenderableNode::SimpleTexture:
     {
         QSGTexture *texture = m_handle.simpleTextureNode->texture();
-        if (QSGSoftwarePixmapTexture *pt = dynamic_cast<QSGSoftwarePixmapTexture *>(texture)) {
+        if (QSGSoftwarePixmapTexture *pt = qobject_cast<QSGSoftwarePixmapTexture *>(texture)) {
             const QPixmap &pm = pt->pixmap();
             painter->drawPixmap(m_handle.simpleTextureNode->rect(), pm, m_handle.simpleTextureNode->sourceRect());
-        } else if (QSGPlainTexture *pt = dynamic_cast<QSGPlainTexture *>(texture)) {
+        } else if (QSGPlainTexture *pt = qobject_cast<QSGPlainTexture *>(texture)) {
             const QImage &im = pt->image();
             painter->drawImage(m_handle.simpleTextureNode->rect(), im, m_handle.simpleTextureNode->sourceRect());
         }
diff --git a/src/quick/scenegraph/adaptations/software/qsgsoftwarerenderer.cpp b/src/quick/scenegraph/adaptations/software/qsgsoftwarerenderer.cpp
index cad826fb27..85d04fe136 100644
--- a/src/quick/scenegraph/adaptations/software/qsgsoftwarerenderer.cpp
+++ b/src/quick/scenegraph/adaptations/software/qsgsoftwarerenderer.cpp
@@ -90,7 +90,7 @@ void QSGSoftwareRenderer::renderScene(uint)
     class B : public QSGBindable
     {
     public:
-        void bind() const { }
+        void bind() const override { }
     } bindable;
     QSGRenderer::renderScene(bindable);
 }
diff --git a/src/quick/scenegraph/adaptations/software/qsgsoftwarethreadedrenderloop.cpp b/src/quick/scenegraph/adaptations/software/qsgsoftwarethreadedrenderloop.cpp
index 8abbefdd48..682f89721e 100644
--- a/src/quick/scenegraph/adaptations/software/qsgsoftwarethreadedrenderloop.cpp
+++ b/src/quick/scenegraph/adaptations/software/qsgsoftwarethreadedrenderloop.cpp
@@ -188,8 +188,8 @@ public:
         delete rc;
     }
 
-    bool event(QEvent *e);
-    void run();
+    bool event(QEvent *e) override;
+    void run() override;
 
     void syncAndRender();
     void sync(bool inExpose);
diff --git a/src/quick/scenegraph/coreapi/qsgbatchrenderer_p.h b/src/quick/scenegraph/coreapi/qsgbatchrenderer_p.h
index 322192944b..2c0f8667e8 100644
--- a/src/quick/scenegraph/coreapi/qsgbatchrenderer_p.h
+++ b/src/quick/scenegraph/coreapi/qsgbatchrenderer_p.h
@@ -440,9 +440,7 @@ struct Batch
     mutable uint uploadedThisFrame : 1; // solely for debugging purposes
 
     Buffer vbo;
-#ifdef QSG_SEPARATE_INDEX_BUFFER
     Buffer ibo;
-#endif
 
     QDataBuffer<DrawSet> drawSets;
 };
@@ -744,9 +742,7 @@ private:
     ClipType m_currentClipType;
 
     QDataBuffer<char> m_vertexUploadPool;
-#ifdef QSG_SEPARATE_INDEX_BUFFER
     QDataBuffer<char> m_indexUploadPool;
-#endif
     // For minimal OpenGL core profile support
     QOpenGLVertexArrayObject *m_vao;
 
@@ -766,10 +762,7 @@ Batch *Renderer::newBatch()
         m_batchPool.resize(size - 1);
     } else {
         b = new Batch();
-        memset(&b->vbo, 0, sizeof(Buffer));
-#ifdef QSG_SEPARATE_INDEX_BUFFER
-        memset(&b->ibo, 0, sizeof(Buffer));
-#endif
+        memset(&b->vbo, 0, sizeof(Buffer) * 2); // Clear VBO & IBO
     }
     b->init();
     return b;
diff --git a/src/quick/scenegraph/coreapi/qsgnode.cpp b/src/quick/scenegraph/coreapi/qsgnode.cpp
index a1e1ef8c27..7ef75d4b4c 100644
--- a/src/quick/scenegraph/coreapi/qsgnode.cpp
+++ b/src/quick/scenegraph/coreapi/qsgnode.cpp
@@ -337,13 +337,6 @@ QSGNode::~QSGNode()
     to the scene graph and will cause the preprocess() function to be called
     for every frame the node is rendered.
 
-    The preprocess function is called before the update pass that propagates
-    opacity and transformations through the scene graph. That means that
-    functions like QSGOpacityNode::combinedOpacity() and
-    QSGTransformNode::combinedMatrix() will not contain up-to-date values.
-    If such values are changed during the preprocess, these changes will be
-    propagated through the scene graph before it is rendered.
-
     \warning Beware of deleting nodes while they are being preprocessed. It is
     possible, with a small performance hit, to delete a single node during its
     own preprocess call. Deleting a subtree which has nodes that also use
diff --git a/src/quick/scenegraph/coreapi/qsgrenderer.cpp b/src/quick/scenegraph/coreapi/qsgrenderer.cpp
index e5d464930c..9207fdbc55 100644
--- a/src/quick/scenegraph/coreapi/qsgrenderer.cpp
+++ b/src/quick/scenegraph/coreapi/qsgrenderer.cpp
@@ -189,7 +189,7 @@ void QSGRenderer::renderScene(uint fboId)
         class B : public QSGBindable
         {
         public:
-            void bind() const { QOpenGLFramebufferObject::bindDefault(); }
+            void bind() const override { QOpenGLFramebufferObject::bindDefault(); }
         } bindable;
         renderScene(bindable);
     }
diff --git a/src/quick/scenegraph/coreapi/qsgrendererinterface.cpp b/src/quick/scenegraph/coreapi/qsgrendererinterface.cpp
index 3b0b2faf97..0f49e615e4 100644
--- a/src/quick/scenegraph/coreapi/qsgrendererinterface.cpp
+++ b/src/quick/scenegraph/coreapi/qsgrendererinterface.cpp
@@ -127,7 +127,7 @@ QSGRendererInterface::~QSGRendererInterface()
  */
 
 /*!
-    Queries a graphics \a resource. Returns null when the resource in question is
+    Queries a graphics \a resource in \a window. Returns null when the resource in question is
     not supported or not available.
 
     When successful, the returned pointer is either a direct pointer to an
diff --git a/src/quick/scenegraph/qsgadaptationlayer_p.h b/src/quick/scenegraph/qsgadaptationlayer_p.h
index 03a1f7f281..a8e35b1ac1 100644
--- a/src/quick/scenegraph/qsgadaptationlayer_p.h
+++ b/src/quick/scenegraph/qsgadaptationlayer_p.h
@@ -209,6 +209,7 @@ public:
     virtual void setDevicePixelRatio(qreal ratio) = 0;
     virtual void setMirrorHorizontal(bool mirror) = 0;
     virtual void setMirrorVertical(bool mirror) = 0;
+    virtual void setSamples(int samples) = 0;
     Q_SLOT virtual void markDirtyTexture() = 0;
     Q_SLOT virtual void invalidated() = 0;
 
diff --git a/src/quick/scenegraph/qsgcontext_p.h b/src/quick/scenegraph/qsgcontext_p.h
index 6b9db105e7..2f5d5790ee 100644
--- a/src/quick/scenegraph/qsgcontext_p.h
+++ b/src/quick/scenegraph/qsgcontext_p.h
@@ -88,6 +88,7 @@ class QSGRectangleNode;
 class QSGImageNode;
 class QSGNinePatchNode;
 class QSGSpriteNode;
+class QSGRenderContext;
 
 Q_DECLARE_LOGGING_CATEGORY(QSG_LOG_TIME_RENDERLOOP)
 Q_DECLARE_LOGGING_CATEGORY(QSG_LOG_TIME_COMPILATION)
@@ -98,6 +99,54 @@ Q_DECLARE_LOGGING_CATEGORY(QSG_LOG_TIME_RENDERER)
 Q_DECLARE_LOGGING_CATEGORY(QSG_LOG_INFO)
 Q_DECLARE_LOGGING_CATEGORY(QSG_LOG_RENDERLOOP)
 
+class Q_QUICK_PRIVATE_EXPORT QSGContext : public QObject
+{
+    Q_OBJECT
+
+public:
+    enum AntialiasingMethod {
+        UndecidedAntialiasing,
+        VertexAntialiasing,
+        MsaaAntialiasing
+    };
+
+    explicit QSGContext(QObject *parent = 0);
+    virtual ~QSGContext();
+
+    virtual void renderContextInitialized(QSGRenderContext *renderContext);
+    virtual void renderContextInvalidated(QSGRenderContext *renderContext);
+    virtual QSGRenderContext *createRenderContext() = 0;
+
+    QSGInternalRectangleNode *createInternalRectangleNode(const QRectF &rect, const QColor &c);
+    virtual QSGInternalRectangleNode *createInternalRectangleNode() = 0;
+    virtual QSGInternalImageNode *createInternalImageNode() = 0;
+    virtual QSGPainterNode *createPainterNode(QQuickPaintedItem *item) = 0;
+    virtual QSGGlyphNode *createGlyphNode(QSGRenderContext *rc, bool preferNativeGlyphNode) = 0;
+    virtual QSGLayer *createLayer(QSGRenderContext *renderContext) = 0;
+    virtual QSGGuiThreadShaderEffectManager *createGuiThreadShaderEffectManager();
+    virtual QSGShaderEffectNode *createShaderEffectNode(QSGRenderContext *renderContext,
+                                                        QSGGuiThreadShaderEffectManager *mgr);
+#if QT_CONFIG(quick_sprite)
+    virtual QSGSpriteNode *createSpriteNode() = 0;
+#endif
+    virtual QAnimationDriver *createAnimationDriver(QObject *parent);
+
+    virtual QSize minimumFBOSize() const;
+    virtual QSurfaceFormat defaultSurfaceFormat() const = 0;
+
+    virtual QSGRendererInterface *rendererInterface(QSGRenderContext *renderContext);
+
+    virtual QSGRectangleNode *createRectangleNode() = 0;
+    virtual QSGImageNode *createImageNode() = 0;
+    virtual QSGNinePatchNode *createNinePatchNode() = 0;
+
+    static QSGContext *createDefaultContext();
+    static QQuickTextureFactory *createTextureFactoryFromImage(const QImage &image);
+    static QSGRenderLoop *createWindowManager();
+
+    static void setBackend(const QString &backend);
+};
+
 class Q_QUICK_PRIVATE_EXPORT QSGRenderContext : public QObject
 {
     Q_OBJECT
@@ -150,55 +199,6 @@ protected:
     QSet<QFontEngine *> m_fontEnginesToClean;
 };
 
-
-class Q_QUICK_PRIVATE_EXPORT QSGContext : public QObject
-{
-    Q_OBJECT
-
-public:
-    enum AntialiasingMethod {
-        UndecidedAntialiasing,
-        VertexAntialiasing,
-        MsaaAntialiasing
-    };
-
-    explicit QSGContext(QObject *parent = 0);
-    virtual ~QSGContext();
-
-    virtual void renderContextInitialized(QSGRenderContext *renderContext);
-    virtual void renderContextInvalidated(QSGRenderContext *renderContext);
-    virtual QSGRenderContext *createRenderContext() = 0;
-
-    QSGInternalRectangleNode *createInternalRectangleNode(const QRectF &rect, const QColor &c);
-    virtual QSGInternalRectangleNode *createInternalRectangleNode() = 0;
-    virtual QSGInternalImageNode *createInternalImageNode() = 0;
-    virtual QSGPainterNode *createPainterNode(QQuickPaintedItem *item) = 0;
-    virtual QSGGlyphNode *createGlyphNode(QSGRenderContext *rc, bool preferNativeGlyphNode) = 0;
-    virtual QSGLayer *createLayer(QSGRenderContext *renderContext) = 0;
-    virtual QSGGuiThreadShaderEffectManager *createGuiThreadShaderEffectManager();
-    virtual QSGShaderEffectNode *createShaderEffectNode(QSGRenderContext *renderContext,
-                                                        QSGGuiThreadShaderEffectManager *mgr);
-#if QT_CONFIG(quick_sprite)
-    virtual QSGSpriteNode *createSpriteNode() = 0;
-#endif
-    virtual QAnimationDriver *createAnimationDriver(QObject *parent);
-
-    virtual QSize minimumFBOSize() const;
-    virtual QSurfaceFormat defaultSurfaceFormat() const = 0;
-
-    virtual QSGRendererInterface *rendererInterface(QSGRenderContext *renderContext);
-
-    virtual QSGRectangleNode *createRectangleNode() = 0;
-    virtual QSGImageNode *createImageNode() = 0;
-    virtual QSGNinePatchNode *createNinePatchNode() = 0;
-
-    static QSGContext *createDefaultContext();
-    static QQuickTextureFactory *createTextureFactoryFromImage(const QImage &image);
-    static QSGRenderLoop *createWindowManager();
-
-    static void setBackend(const QString &backend);
-};
-
 QT_END_NAMESPACE
 
 #endif // QSGCONTEXT_H
diff --git a/src/quick/scenegraph/qsgdefaultcontext.cpp b/src/quick/scenegraph/qsgdefaultcontext.cpp
index 405f1d86a4..d31a7025e5 100644
--- a/src/quick/scenegraph/qsgdefaultcontext.cpp
+++ b/src/quick/scenegraph/qsgdefaultcontext.cpp
@@ -68,13 +68,13 @@ QT_BEGIN_NAMESPACE
 namespace QSGMultisampleAntialiasing {
     class ImageNode : public QSGDefaultInternalImageNode {
     public:
-        void setAntialiasing(bool) { }
+        void setAntialiasing(bool) override { }
     };
 
 
     class RectangleNode : public QSGDefaultInternalRectangleNode {
     public:
-        void setAntialiasing(bool) { }
+        void setAntialiasing(bool) override { }
     };
 }
 
diff --git a/src/quick/scenegraph/qsgdefaultglyphnode_p.cpp b/src/quick/scenegraph/qsgdefaultglyphnode_p.cpp
index b001899915..edb6e92a0d 100644
--- a/src/quick/scenegraph/qsgdefaultglyphnode_p.cpp
+++ b/src/quick/scenegraph/qsgdefaultglyphnode_p.cpp
@@ -91,11 +91,11 @@ class QSGTextMaskShader : public QSGMaterialShader
 public:
     QSGTextMaskShader(QFontEngine::GlyphFormat glyphFormat);
 
-    virtual void updateState(const RenderState &state, QSGMaterial *newEffect, QSGMaterial *oldEffect);
-    virtual char const *const *attributeNames() const;
+    void updateState(const RenderState &state, QSGMaterial *newEffect, QSGMaterial *oldEffect) override;
+    char const *const *attributeNames() const override;
 
 protected:
-    virtual void initialize();
+    void initialize() override;
 
     int m_matrix_id;
     int m_color_id;
@@ -181,7 +181,7 @@ public:
         setShaderSourceFile(QOpenGLShader::Fragment, QStringLiteral(":/qt-project.org/scenegraph/shaders/8bittextmask.frag"));
     }
 
-    virtual void updateState(const RenderState &state, QSGMaterial *newEffect, QSGMaterial *oldEffect);
+    void updateState(const RenderState &state, QSGMaterial *newEffect, QSGMaterial *oldEffect) override;
 };
 
 void QSG8BitTextMaskShader::updateState(const RenderState &state, QSGMaterial *newEffect, QSGMaterial *oldEffect)
@@ -206,10 +206,10 @@ public:
         setShaderSourceFile(QOpenGLShader::Fragment, QStringLiteral(":/qt-project.org/scenegraph/shaders/24bittextmask.frag"));
     }
 
-    virtual void updateState(const RenderState &state, QSGMaterial *newEffect, QSGMaterial *oldEffect);
-    virtual void initialize();
-    void activate();
-    void deactivate();
+    void updateState(const RenderState &state, QSGMaterial *newEffect, QSGMaterial *oldEffect) override;
+    void initialize() override;
+    void activate() override;
+    void deactivate() override;
 
     bool useSRGB() const;
     uint m_useSRGB : 1;
@@ -326,10 +326,10 @@ public:
         setShaderSourceFile(QOpenGLShader::Fragment, QStringLiteral(":/qt-project.org/scenegraph/shaders/styledtext.frag"));
     }
 
-    virtual void updateState(const RenderState &state, QSGMaterial *newEffect, QSGMaterial *oldEffect);
+    void updateState(const RenderState &state, QSGMaterial *newEffect, QSGMaterial *oldEffect) override;
 
 private:
-    virtual void initialize();
+    void initialize() override;
 
     int m_shift_id;
     int m_styleColor_id;
diff --git a/src/quick/scenegraph/qsgdefaultinternalimagenode.cpp b/src/quick/scenegraph/qsgdefaultinternalimagenode.cpp
index 1d54628acd..a5a6da06a7 100644
--- a/src/quick/scenegraph/qsgdefaultinternalimagenode.cpp
+++ b/src/quick/scenegraph/qsgdefaultinternalimagenode.cpp
@@ -50,11 +50,11 @@ class SmoothTextureMaterialShader : public QSGTextureMaterialShader
 public:
     SmoothTextureMaterialShader();
 
-    virtual void updateState(const RenderState &state, QSGMaterial *newEffect, QSGMaterial *oldEffect);
-    virtual char const *const *attributeNames() const;
+    void updateState(const RenderState &state, QSGMaterial *newEffect, QSGMaterial *oldEffect) override;
+    char const *const *attributeNames() const override;
 
 protected:
-    virtual void initialize();
+    void initialize() override;
 
     int m_pixelSizeLoc;
 };
diff --git a/src/quick/scenegraph/qsgdefaultinternalrectanglenode.cpp b/src/quick/scenegraph/qsgdefaultinternalrectanglenode.cpp
index 94414444ba..e52dcaad52 100644
--- a/src/quick/scenegraph/qsgdefaultinternalrectanglenode.cpp
+++ b/src/quick/scenegraph/qsgdefaultinternalrectanglenode.cpp
@@ -55,11 +55,11 @@ class SmoothColorMaterialShader : public QSGMaterialShader
 public:
     SmoothColorMaterialShader();
 
-    virtual void updateState(const RenderState &state, QSGMaterial *newEffect, QSGMaterial *oldEffect);
-    virtual char const *const *attributeNames() const;
+    void updateState(const RenderState &state, QSGMaterial *newEffect, QSGMaterial *oldEffect) override;
+    char const *const *attributeNames() const override;
 
 private:
-    virtual void initialize();
+    void initialize() override;
 
     int m_matrixLoc;
     int m_opacityLoc;
diff --git a/src/quick/scenegraph/qsgdefaultlayer.cpp b/src/quick/scenegraph/qsgdefaultlayer.cpp
index ad5b57ff83..fc8040e67b 100644
--- a/src/quick/scenegraph/qsgdefaultlayer.cpp
+++ b/src/quick/scenegraph/qsgdefaultlayer.cpp
@@ -99,6 +99,7 @@ QSGDefaultLayer::QSGDefaultLayer(QSGRenderContext *context)
 #ifdef QSG_DEBUG_FBO_OVERLAY
     , m_debugOverlay(0)
 #endif
+    , m_samples(0)
     , m_mipmap(false)
     , m_live(true)
     , m_recursive(false)
@@ -313,11 +314,20 @@ void QSGDefaultLayer::grab()
 
     QOpenGLFunctions *funcs = QOpenGLContext::currentContext()->functions();
     bool deleteFboLater = false;
-    if (!m_fbo || m_fbo->size() != m_size || m_fbo->format().internalTextureFormat() != m_format
-        || (!m_fbo->format().mipmap() && m_mipmap))
-    {
+
+    int effectiveSamples = m_samples;
+    // By default m_samples is 0. Fall back to the context's setting in this case.
+    if (effectiveSamples == 0)
+        effectiveSamples = m_context->openglContext()->format().samples();
+
+    const bool needsNewFbo = !m_fbo || m_fbo->size() != m_size || m_fbo->format().internalTextureFormat() != m_format;
+    const bool mipmapGotEnabled = m_fbo && !m_fbo->format().mipmap() && m_mipmap;
+    const bool msaaGotEnabled = effectiveSamples > 1 && (!m_secondaryFbo || m_secondaryFbo->format().samples() != effectiveSamples);
+    const bool msaaGotDisabled = effectiveSamples <= 1 && m_secondaryFbo;
+
+    if (needsNewFbo || mipmapGotEnabled || msaaGotEnabled || msaaGotDisabled) {
         if (!m_multisamplingChecked) {
-            if (m_context->openglContext()->format().samples() <= 1) {
+            if (effectiveSamples <= 1) {
                 m_multisampling = false;
             } else {
                 const QSet<QByteArray> extensions = m_context->openglContext()->extensions();
@@ -333,7 +343,7 @@ void QSGDefaultLayer::grab()
             QOpenGLFramebufferObjectFormat format;
 
             format.setInternalTextureFormat(m_format);
-            format.setSamples(m_context->openglContext()->format().samples());
+            format.setSamples(effectiveSamples);
             m_secondaryFbo = new QOpenGLFramebufferObject(m_size, format);
             m_depthStencilBuffer = m_context->depthStencilBufferForFbo(m_secondaryFbo);
         } else {
diff --git a/src/quick/scenegraph/qsgdefaultlayer_p.h b/src/quick/scenegraph/qsgdefaultlayer_p.h
index ae39994096..7b09293095 100644
--- a/src/quick/scenegraph/qsgdefaultlayer_p.h
+++ b/src/quick/scenegraph/qsgdefaultlayer_p.h
@@ -113,6 +113,9 @@ public:
 
     QRectF normalizedTextureSubRect() const Q_DECL_OVERRIDE;
 
+    int samples() const { return m_samples; }
+    void setSamples(int samples) Q_DECL_OVERRIDE { m_samples = samples; }
+
 public Q_SLOTS:
     void markDirtyTexture() Q_DECL_OVERRIDE;
     void invalidated() Q_DECL_OVERRIDE;
@@ -138,6 +141,7 @@ private:
 #endif
 
     QSGDefaultRenderContext *m_context;
+    int m_samples;
 
     uint m_mipmap : 1;
     uint m_live : 1;
diff --git a/src/quick/scenegraph/qsgdistancefieldglyphnode_p.cpp b/src/quick/scenegraph/qsgdistancefieldglyphnode_p.cpp
index ca91e5d85f..fc66f2f2cc 100644
--- a/src/quick/scenegraph/qsgdistancefieldglyphnode_p.cpp
+++ b/src/quick/scenegraph/qsgdistancefieldglyphnode_p.cpp
@@ -52,11 +52,11 @@ class QSGDistanceFieldTextMaterialShader : public QSGMaterialShader
 public:
     QSGDistanceFieldTextMaterialShader();
 
-    virtual void updateState(const RenderState &state, QSGMaterial *newEffect, QSGMaterial *oldEffect);
-    virtual char const *const *attributeNames() const;
+    void updateState(const RenderState &state, QSGMaterial *newEffect, QSGMaterial *oldEffect) override;
+    char const *const *attributeNames() const override;
 
 protected:
-    virtual void initialize();
+    void initialize() override;
 
     void updateAlphaRange(ThresholdFunc thresholdFunc, AntialiasingSpreadFunc spreadFunc);
     void updateColor(const QVector4D &c);
@@ -261,10 +261,10 @@ class DistanceFieldStyledTextMaterialShader : public QSGDistanceFieldTextMateria
 public:
     DistanceFieldStyledTextMaterialShader();
 
-    virtual void updateState(const RenderState &state, QSGMaterial *newEffect, QSGMaterial *oldEffect);
+    void updateState(const RenderState &state, QSGMaterial *newEffect, QSGMaterial *oldEffect) override;
 
 protected:
-    virtual void initialize();
+    void initialize() override;
 
     int m_styleColor_id;
 };
@@ -329,10 +329,10 @@ class DistanceFieldOutlineTextMaterialShader : public DistanceFieldStyledTextMat
 public:
     DistanceFieldOutlineTextMaterialShader();
 
-    virtual void updateState(const RenderState &state, QSGMaterial *newEffect, QSGMaterial *oldEffect);
+    void updateState(const RenderState &state, QSGMaterial *newEffect, QSGMaterial *oldEffect) override;
 
 protected:
-    virtual void initialize();
+    void initialize() override;
 
     void updateOutlineAlphaRange(ThresholdFunc thresholdFunc, AntialiasingSpreadFunc spreadFunc, int dfRadius);
 
@@ -413,10 +413,10 @@ class DistanceFieldShiftedStyleTextMaterialShader : public DistanceFieldStyledTe
 public:
     DistanceFieldShiftedStyleTextMaterialShader();
 
-    virtual void updateState(const RenderState &state, QSGMaterial *newEffect, QSGMaterial *oldEffect);
+    void updateState(const RenderState &state, QSGMaterial *newEffect, QSGMaterial *oldEffect) override;
 
 protected:
-    virtual void initialize();
+    void initialize() override;
 
     void updateShift(qreal fontScale, const QPointF& shift);
 
@@ -492,10 +492,10 @@ class QSGHiQSubPixelDistanceFieldTextMaterialShader : public QSGDistanceFieldTex
 public:
     QSGHiQSubPixelDistanceFieldTextMaterialShader();
 
-    virtual void initialize();
-    virtual void activate();
-    virtual void deactivate();
-    virtual void updateState(const RenderState &state, QSGMaterial *newEffect, QSGMaterial *oldEffect);
+    void initialize() override;
+    void activate() override;
+    void deactivate() override;
+    void updateState(const RenderState &state, QSGMaterial *newEffect, QSGMaterial *oldEffect) override;
 
 private:
     int m_fontScale_id;
diff --git a/src/quick/scenegraph/qsgrenderloop.cpp b/src/quick/scenegraph/qsgrenderloop.cpp
index 48288bfc62..bb581c5e36 100644
--- a/src/quick/scenegraph/qsgrenderloop.cpp
+++ b/src/quick/scenegraph/qsgrenderloop.cpp
@@ -139,25 +139,25 @@ public:
     QSGGuiThreadRenderLoop();
     ~QSGGuiThreadRenderLoop();
 
-    void show(QQuickWindow *window);
-    void hide(QQuickWindow *window);
+    void show(QQuickWindow *window) override;
+    void hide(QQuickWindow *window) override;
 
-    void windowDestroyed(QQuickWindow *window);
+    void windowDestroyed(QQuickWindow *window) override;
 
     void renderWindow(QQuickWindow *window);
-    void exposureChanged(QQuickWindow *window);
-    QImage grab(QQuickWindow *window);
+    void exposureChanged(QQuickWindow *window) override;
+    QImage grab(QQuickWindow *window) override;
 
-    void maybeUpdate(QQuickWindow *window);
-    void update(QQuickWindow *window) { maybeUpdate(window); } // identical for this implementation.
-    void handleUpdateRequest(QQuickWindow *);
+    void maybeUpdate(QQuickWindow *window) override;
+    void update(QQuickWindow *window) override { maybeUpdate(window); } // identical for this implementation.
+    void handleUpdateRequest(QQuickWindow *) override;
 
-    void releaseResources(QQuickWindow *) { }
+    void releaseResources(QQuickWindow *) override { }
 
-    QAnimationDriver *animationDriver() const { return 0; }
+    QAnimationDriver *animationDriver() const override { return 0; }
 
-    QSGContext *sceneGraphContext() const;
-    QSGRenderContext *createRenderContext(QSGContext *) const { return rc; }
+    QSGContext *sceneGraphContext() const override;
+    QSGRenderContext *createRenderContext(QSGContext *) const override { return rc; }
 
     struct WindowData {
         bool updatePending : 1;
diff --git a/src/quick/scenegraph/qsgthreadedrenderloop.cpp b/src/quick/scenegraph/qsgthreadedrenderloop.cpp
index 5fa74027c1..17a2c62a4e 100644
--- a/src/quick/scenegraph/qsgthreadedrenderloop.cpp
+++ b/src/quick/scenegraph/qsgthreadedrenderloop.cpp
@@ -295,8 +295,8 @@ public:
     void invalidateOpenGL(QQuickWindow *window, bool inDestructor, QOffscreenSurface *backupSurface);
     void initializeOpenGL();
 
-    bool event(QEvent *);
-    void run();
+    bool event(QEvent *) override;
+    void run() override;
 
     void syncAndRender();
     void sync(bool inExpose);
diff --git a/src/quick/scenegraph/scenegraph.pri b/src/quick/scenegraph/scenegraph.pri
index edf4aa08c5..38c3b8dd85 100644
--- a/src/quick/scenegraph/scenegraph.pri
+++ b/src/quick/scenegraph/scenegraph.pri
@@ -1,4 +1,4 @@
-# DEFINES += QSG_SEPARATE_INDEX_BUFFER
+DEFINES += QSG_SEPARATE_INDEX_BUFFER
 # DEFINES += QSG_DISTANCEFIELD_CACHE_DEBUG
 
 # Core API
diff --git a/src/quick/scenegraph/util/qsgdefaultimagenode.cpp b/src/quick/scenegraph/util/qsgdefaultimagenode.cpp
index 63773887a0..7186ee4265 100644
--- a/src/quick/scenegraph/util/qsgdefaultimagenode.cpp
+++ b/src/quick/scenegraph/util/qsgdefaultimagenode.cpp
@@ -94,6 +94,21 @@ QSGTexture::Filtering QSGDefaultImageNode::mipmapFiltering() const
     return m_material.mipmapFiltering();
 }
 
+void QSGDefaultImageNode::setAnisotropyLevel(QSGTexture::AnisotropyLevel level)
+{
+    if (m_material.anisotropyLevel() == level)
+        return;
+
+    m_material.setAnisotropyLevel(level);
+    m_opaque_material.setAnisotropyLevel(level);
+    markDirty(DirtyMaterial);
+}
+
+QSGTexture::AnisotropyLevel QSGDefaultImageNode::anisotropyLevel() const
+{
+    return m_material.anisotropyLevel();
+}
+
 void QSGDefaultImageNode::setRect(const QRectF &r)
 {
     if (m_rect == r)
diff --git a/src/quick/scenegraph/util/qsgdefaultimagenode_p.h b/src/quick/scenegraph/util/qsgdefaultimagenode_p.h
index bb9ebec885..cb23e759d3 100644
--- a/src/quick/scenegraph/util/qsgdefaultimagenode_p.h
+++ b/src/quick/scenegraph/util/qsgdefaultimagenode_p.h
@@ -85,6 +85,10 @@ public:
     void setOwnsTexture(bool owns) override;
     bool ownsTexture() const override;
 
+    // QSGImageNode now being a public class does not allow any additional virtual methods. Placing these here, non-virtual.
+    void setAnisotropyLevel(QSGTexture::AnisotropyLevel level);
+    QSGTexture::AnisotropyLevel anisotropyLevel() const;
+
 private:
     QSGGeometry m_geometry;
     QSGOpaqueTextureMaterial m_opaque_material;
diff --git a/src/quick/scenegraph/util/qsgflatcolormaterial.cpp b/src/quick/scenegraph/util/qsgflatcolormaterial.cpp
index 8ab7669891..a0c71b5340 100644
--- a/src/quick/scenegraph/util/qsgflatcolormaterial.cpp
+++ b/src/quick/scenegraph/util/qsgflatcolormaterial.cpp
@@ -50,13 +50,13 @@ class FlatColorMaterialShader : public QSGMaterialShader
 public:
     FlatColorMaterialShader();
 
-    virtual void updateState(const RenderState &state, QSGMaterial *newEffect, QSGMaterial *oldEffect);
-    virtual char const *const *attributeNames() const;
+    void updateState(const RenderState &state, QSGMaterial *newEffect, QSGMaterial *oldEffect) override;
+    char const *const *attributeNames() const override;
 
     static QSGMaterialType type;
 
 private:
-    virtual void initialize();
+    void initialize() override;
 #if QT_CONFIG(opengl)
     int m_matrix_id;
     int m_color_id;
diff --git a/src/quick/scenegraph/util/qsgimagenode.h b/src/quick/scenegraph/util/qsgimagenode.h
index d25e732e4b..0e053c307f 100644
--- a/src/quick/scenegraph/util/qsgimagenode.h
+++ b/src/quick/scenegraph/util/qsgimagenode.h
@@ -67,6 +67,8 @@ public:
     virtual void setMipmapFiltering(QSGTexture::Filtering filtering) = 0;
     virtual QSGTexture::Filtering mipmapFiltering() const = 0;
 
+    // ### Qt6: Add anisotropy support here, and possibly a virtual hook or another mean to extend this class.
+
     enum TextureCoordinatesTransformFlag {
         NoTransform        = 0x00,
         MirrorHorizontally = 0x01,
diff --git a/src/quick/scenegraph/util/qsgtexture.cpp b/src/quick/scenegraph/util/qsgtexture.cpp
index d761eac62f..521c5e666f 100644
--- a/src/quick/scenegraph/util/qsgtexture.cpp
+++ b/src/quick/scenegraph/util/qsgtexture.cpp
@@ -83,6 +83,9 @@ static const bool qsg_leak_check = !qEnvironmentVariableIsEmpty("QML_LEAK_CHECK"
 #define GL_BGRA 0x80E1
 #endif
 
+#ifndef GL_TEXTURE_MAX_ANISOTROPY_EXT
+#define GL_TEXTURE_MAX_ANISOTROPY_EXT 0x84FE
+#endif
 
 QT_BEGIN_NAMESPACE
 
@@ -97,10 +100,12 @@ inline static bool isPowerOfTwo(int x)
 QSGTexturePrivate::QSGTexturePrivate()
     : wrapChanged(false)
     , filteringChanged(false)
+    , anisotropyChanged(false)
     , horizontalWrap(QSGTexture::ClampToEdge)
     , verticalWrap(QSGTexture::ClampToEdge)
     , mipmapMode(QSGTexture::None)
     , filterMode(QSGTexture::Nearest)
+    , anisotropyLevel(QSGTexture::AnisotropyNone)
 {
 }
 
@@ -278,6 +283,23 @@ static void qt_debug_remove_texture(QSGTexture* texture)
 */
 
 /*!
+    \enum QSGTexture::AnisotropyLevel
+
+    Specifies the anisotropic filtering level to be used when
+    the texture is not screen aligned.
+
+    \value AnisotropyNone No anisotropic filtering.
+
+    \value Anisotropy2x 2x anisotropic filtering.
+
+    \value Anisotropy4x 4x anisotropic filtering.
+
+    \value Anisotropy8x 8x anisotropic filtering.
+
+    \value Anisotropy16x 16x anisotropic filtering.
+*/
+
+/*!
     \fn QSGTexture::QSGTexture(QSGTexturePrivate &dd)
     \internal
  */
@@ -476,6 +498,31 @@ QSGTexture::Filtering QSGTexture::filtering() const
     return (QSGTexture::Filtering) d_func()->filterMode;
 }
 
+/*!
+    Sets the level of anisotropic filtering to be used for the upcoming bind() call to \a level.
+    The default value is QSGTexture::AnisotropyNone, which means no anisotropic filtering is enabled.
+
+    \since 5.9
+ */
+void QSGTexture::setAnisotropyLevel(AnisotropyLevel level)
+{
+    Q_D(QSGTexture);
+    if (d->anisotropyLevel != (uint) level) {
+        d->anisotropyLevel = level;
+        d->anisotropyChanged = true;
+    }
+}
+
+/*!
+    Returns the anisotropy level in use for filtering this texture.
+
+    \since 5.9
+ */
+QSGTexture::AnisotropyLevel QSGTexture::anisotropyLevel() const
+{
+    return (QSGTexture::AnisotropyLevel) d_func()->anisotropyLevel;
+}
+
 
 
 /*!
@@ -552,6 +599,12 @@ void QSGTexture::updateBindOptions(bool force)
         d->filteringChanged = false;
     }
 
+    if (force || d->anisotropyChanged) {
+        d->anisotropyChanged = false;
+        if (QOpenGLContext::currentContext()->hasExtension(QByteArrayLiteral("GL_EXT_texture_filter_anisotropic")))
+            funcs->glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAX_ANISOTROPY_EXT, float(1 << (d->anisotropyLevel)));
+    }
+
     if (force || d->wrapChanged) {
 #ifndef QT_NO_DEBUG
         if (d->horizontalWrap == Repeat || d->verticalWrap == Repeat
diff --git a/src/quick/scenegraph/util/qsgtexture.h b/src/quick/scenegraph/util/qsgtexture.h
index 2b29525efd..032129434e 100644
--- a/src/quick/scenegraph/util/qsgtexture.h
+++ b/src/quick/scenegraph/util/qsgtexture.h
@@ -68,6 +68,14 @@ public:
         Linear
     };
 
+    enum AnisotropyLevel {
+        AnisotropyNone,
+        Anisotropy2x,
+        Anisotropy4x,
+        Anisotropy8x,
+        Anisotropy16x
+    };
+
     virtual int textureId() const = 0;
     virtual QSize textureSize() const = 0;
     virtual bool hasAlphaChannel() const = 0;
@@ -88,6 +96,9 @@ public:
     void setFiltering(Filtering filter);
     QSGTexture::Filtering filtering() const;
 
+    void setAnisotropyLevel(AnisotropyLevel level);
+    QSGTexture::AnisotropyLevel anisotropyLevel() const;
+
     void setHorizontalWrapMode(WrapMode hwrap);
     QSGTexture::WrapMode horizontalWrapMode() const;
 
diff --git a/src/quick/scenegraph/util/qsgtexture_p.h b/src/quick/scenegraph/util/qsgtexture_p.h
index 3a10d85b4d..52dc6db2d0 100644
--- a/src/quick/scenegraph/util/qsgtexture_p.h
+++ b/src/quick/scenegraph/util/qsgtexture_p.h
@@ -69,11 +69,13 @@ public:
 
     uint wrapChanged : 1;
     uint filteringChanged : 1;
+    uint anisotropyChanged : 1;
 
     uint horizontalWrap : 2;
     uint verticalWrap : 2;
     uint mipmapMode : 2;
     uint filterMode : 2;
+    uint anisotropyLevel: 3;
 };
 
 class Q_QUICK_PRIVATE_EXPORT QSGPlainTexture : public QSGTexture
diff --git a/src/quick/scenegraph/util/qsgtexturematerial.cpp b/src/quick/scenegraph/util/qsgtexturematerial.cpp
index fcafbba6a2..fbc8f27a63 100644
--- a/src/quick/scenegraph/util/qsgtexturematerial.cpp
+++ b/src/quick/scenegraph/util/qsgtexturematerial.cpp
@@ -110,6 +110,7 @@ void QSGOpaqueTextureMaterialShader::updateState(const RenderState &state, QSGMa
     Q_UNUSED(state)
 #endif
     t->setMipmapFiltering(tx->mipmapFiltering());
+    t->setAnisotropyLevel(tx->anisotropyLevel());
 
     if (oldTx == 0 || oldTx->texture()->textureId() != t->textureId())
         t->bind();
@@ -173,6 +174,7 @@ QSGOpaqueTextureMaterial::QSGOpaqueTextureMaterial()
     , m_mipmap_filtering(QSGTexture::None)
     , m_horizontal_wrap(QSGTexture::ClampToEdge)
     , m_vertical_wrap(QSGTexture::ClampToEdge)
+    , m_anisotropy_level(QSGTexture::AnisotropyNone)
 {
 }
 
diff --git a/src/quick/scenegraph/util/qsgtexturematerial.h b/src/quick/scenegraph/util/qsgtexturematerial.h
index dc87131773..87d8e5fd49 100644
--- a/src/quick/scenegraph/util/qsgtexturematerial.h
+++ b/src/quick/scenegraph/util/qsgtexturematerial.h
@@ -69,6 +69,9 @@ public:
     void setVerticalWrapMode(QSGTexture::WrapMode mode) { m_vertical_wrap = mode; }
     QSGTexture::WrapMode verticalWrapMode() const { return QSGTexture::WrapMode(m_vertical_wrap); }
 
+    void setAnisotropyLevel(QSGTexture::AnisotropyLevel level) { m_anisotropy_level = level; }
+    QSGTexture::AnisotropyLevel anisotropyLevel() const { return QSGTexture::AnisotropyLevel(m_anisotropy_level); }
+
 protected:
     QSGTexture *m_texture;
 
@@ -76,8 +79,8 @@ protected:
     uint m_mipmap_filtering: 2;
     uint m_horizontal_wrap : 1;
     uint m_vertical_wrap: 1;
-
-    uint m_reserved : 26;
+    uint m_anisotropy_level : 3;
+    uint m_reserved : 23;
 };
 
 
diff --git a/src/quick/scenegraph/util/qsgvertexcolormaterial.cpp b/src/quick/scenegraph/util/qsgvertexcolormaterial.cpp
index 8c305d7fd4..42c589b14a 100644
--- a/src/quick/scenegraph/util/qsgvertexcolormaterial.cpp
+++ b/src/quick/scenegraph/util/qsgvertexcolormaterial.cpp
@@ -48,13 +48,13 @@ class QSGVertexColorMaterialShader : public QSGMaterialShader
 public:
     QSGVertexColorMaterialShader();
 
-    virtual void updateState(const RenderState &state, QSGMaterial *newEffect, QSGMaterial *oldEffect);
-    virtual char const *const *attributeNames() const;
+    void updateState(const RenderState &state, QSGMaterial *newEffect, QSGMaterial *oldEffect) override;
+    char const *const *attributeNames() const override;
 
     static QSGMaterialType type;
 
 private:
-    virtual void initialize();
+    void initialize() override;
 #if QT_CONFIG(opengl)
     int m_matrix_id;
     int m_opacity_id;
diff --git a/src/quick/util/qquickglobal.cpp b/src/quick/util/qquickglobal.cpp
index 5a723e4432..20bb23338d 100644
--- a/src/quick/util/qquickglobal.cpp
+++ b/src/quick/util/qquickglobal.cpp
@@ -61,7 +61,7 @@ QT_BEGIN_NAMESPACE
 class QQuickColorProvider : public QQmlColorProvider
 {
 public:
-    QVariant colorFromString(const QString &s, bool *ok)
+    QVariant colorFromString(const QString &s, bool *ok) override
     {
         QColor c(s);
         if (c.isValid()) {
@@ -73,7 +73,7 @@ public:
         return QVariant();
     }
 
-    unsigned rgbaFromString(const QString &s, bool *ok)
+    unsigned rgbaFromString(const QString &s, bool *ok) override
     {
         QColor c(s);
         if (c.isValid()) {
@@ -95,36 +95,36 @@ public:
         return QString();
     }
 
-    QVariant fromRgbF(double r, double g, double b, double a)
+    QVariant fromRgbF(double r, double g, double b, double a) override
     {
         return QVariant(QColor::fromRgbF(r, g, b, a));
     }
 
-    QVariant fromHslF(double h, double s, double l, double a)
+    QVariant fromHslF(double h, double s, double l, double a) override
     {
         return QVariant(QColor::fromHslF(h, s, l, a));
     }
 
-    QVariant fromHsvF(double h, double s, double v, double a)
+    QVariant fromHsvF(double h, double s, double v, double a) override
     {
         return QVariant(QColor::fromHsvF(h, s, v, a));
     }
 
-    QVariant lighter(const QVariant &var, qreal factor)
+    QVariant lighter(const QVariant &var, qreal factor) override
     {
         QColor color = var.value<QColor>();
         color = color.lighter(int(qRound(factor*100.)));
         return QVariant::fromValue(color);
     }
 
-    QVariant darker(const QVariant &var, qreal factor)
+    QVariant darker(const QVariant &var, qreal factor) override
     {
         QColor color = var.value<QColor>();
         color = color.darker(int(qRound(factor*100.)));
         return QVariant::fromValue(color);
     }
 
-    QVariant tint(const QVariant &baseVar, const QVariant &tintVar)
+    QVariant tint(const QVariant &baseVar, const QVariant &tintVar) override
     {
         QColor tintColor = tintVar.value<QColor>();
 
@@ -778,13 +778,13 @@ public:
 class QQuickGuiProvider : public QQmlGuiProvider
 {
 public:
-    QQuickApplication *application(QObject *parent)
+    QQuickApplication *application(QObject *parent) override
     {
         return new QQuickApplication(parent);
     }
 
 #if QT_CONFIG(im)
-    QInputMethod *inputMethod()
+    QInputMethod *inputMethod() override
     {
         QInputMethod *im = qGuiApp->inputMethod();
         QQmlEngine::setObjectOwnership(im, QQmlEngine::CppOwnership);
@@ -792,20 +792,20 @@ public:
     }
 #endif
 
-    QStyleHints *styleHints()
+    QStyleHints *styleHints() override
     {
         QStyleHints *sh = qGuiApp->styleHints();
         QQmlEngine::setObjectOwnership(sh, QQmlEngine::CppOwnership);
         return sh;
     }
 
-    QStringList fontFamilies()
+    QStringList fontFamilies() override
     {
         QFontDatabase database;
         return database.families();
     }
 
-    bool openUrlExternally(QUrl &url)
+    bool openUrlExternally(QUrl &url) override
     {
 #ifndef QT_NO_DESKTOPSERVICES
         return QDesktopServices::openUrl(url);
diff --git a/src/quick/util/qquickpixmapcache.cpp b/src/quick/util/qquickpixmapcache.cpp
index 1c6b2afb54..395b89c784 100644
--- a/src/quick/util/qquickpixmapcache.cpp
+++ b/src/quick/util/qquickpixmapcache.cpp
@@ -84,6 +84,7 @@
 
 QT_BEGIN_NAMESPACE
 
+const QLatin1String QQuickPixmap::itemGrabberScheme = QLatin1String("itemgrabber");
 
 #ifndef QT_NO_DEBUG
 static const bool qsg_leak_check = !qEnvironmentVariableIsEmpty("QML_LEAK_CHECK");
@@ -160,7 +161,7 @@ Q_SIGNALS:
     void downloadProgress(qint64, qint64);
 
 protected:
-    bool event(QEvent *event);
+    bool event(QEvent *event) override;
 
 private:
     Q_DISABLE_COPY(QQuickPixmapReply)
@@ -198,7 +199,7 @@ public:
     static QQuickPixmapReader *existingInstance(QQmlEngine *engine);
 
 protected:
-    void run();
+    void run() override;
 
 private:
     friend class QQuickPixmapReaderThreadObject;
@@ -1462,8 +1463,15 @@ void QQuickPixmap::load(QQmlEngine *engine, const QUrl &url, const QSize &reques
     QHash<QQuickPixmapKey, QQuickPixmapData *>::Iterator iter = store->m_cache.end();
 
     // If Cache is disabled, the pixmap will always be loaded, even if there is an existing
-    // cached version.
-    if (options & QQuickPixmap::Cache)
+    // cached version. Unless it's an itemgrabber url, since the cache is used to pass
+    // the result between QQuickItemGrabResult and QQuickImage.
+    if (url.scheme() == itemGrabberScheme) {
+        QSize dummy;
+        if (requestSize != dummy)
+            qWarning() << "Ignoring sourceSize request for image url that came from grabToImage. Use the targetSize parameter of the grabToImage() function instead.";
+        const QQuickPixmapKey grabberKey = { &url, &dummy, QQuickImageProviderOptions() };
+        iter = store->m_cache.find(grabberKey);
+    } else if (options & QQuickPixmap::Cache)
         iter = store->m_cache.find(key);
 
     if (iter == store->m_cache.end()) {
@@ -1533,9 +1541,9 @@ void QQuickPixmap::clear(QObject *obj)
     }
 }
 
-bool QQuickPixmap::isCached(const QUrl &url, const QSize &requestSize)
+bool QQuickPixmap::isCached(const QUrl &url, const QSize &requestSize, const QQuickImageProviderOptions &options)
 {
-    QQuickPixmapKey key = { &url, &requestSize, QQuickImageProviderOptions() };
+    QQuickPixmapKey key = { &url, &requestSize, options };
     QQuickPixmapStore *store = pixmapStore();
 
     return store->m_cache.contains(key);
diff --git a/src/quick/util/qquickpixmapcache_p.h b/src/quick/util/qquickpixmapcache_p.h
index f7cdfa7d07..93d5a1cf56 100644
--- a/src/quick/util/qquickpixmapcache_p.h
+++ b/src/quick/util/qquickpixmapcache_p.h
@@ -175,7 +175,9 @@ public:
     bool connectDownloadProgress(QObject *, int);
 
     static void purgeCache();
-    static bool isCached(const QUrl &url, const QSize &requestSize);
+    static bool isCached(const QUrl &url, const QSize &requestSize, const QQuickImageProviderOptions &options);
+
+    static const QLatin1String itemGrabberScheme;
 
 private:
     Q_DISABLE_COPY(QQuickPixmap)
diff --git a/src/quick/util/qquickutilmodule.cpp b/src/quick/util/qquickutilmodule.cpp
index 77dae0d001..b2e5b84cf4 100644
--- a/src/quick/util/qquickutilmodule.cpp
+++ b/src/quick/util/qquickutilmodule.cpp
@@ -54,7 +54,9 @@
 #include "qquicktextmetrics_p.h"
 #include "qquicktransition_p.h"
 #include "qquickanimator_p.h"
+#if QT_CONFIG(shortcut)
 #include "qquickshortcut_p.h"
+#endif
 #include "qquickvalidator_p.h"
 #include <qqmlinfo.h>
 #include <private/qqmltypenotavailable_p.h>
@@ -63,7 +65,9 @@
 #include <QtGui/QInputMethod>
 #include <QtGui/QKeySequence>
 
+#if QT_CONFIG(shortcut)
 Q_DECLARE_METATYPE(QKeySequence::StandardKey)
+#endif
 
 void QQuickUtilModule::defineModule()
 {
@@ -114,15 +118,18 @@ void QQuickUtilModule::defineModule()
 
     qmlRegisterCustomType<QQuickPropertyChanges>("QtQuick",2,0,"PropertyChanges", new QQuickPropertyChangesParser);
 
+#if QT_CONFIG(shortcut)
     qRegisterMetaType<QKeySequence::StandardKey>();
     qmlRegisterUncreatableType<QKeySequence, 2>("QtQuick", 2, 2, "StandardKey", QStringLiteral("Cannot create an instance of StandardKey."));
+#endif
 
     qmlRegisterType<QQuickFontMetrics>("QtQuick", 2, 4, "FontMetrics");
     qmlRegisterType<QQuickTextMetrics>("QtQuick", 2, 4, "TextMetrics");
 
+#if QT_CONFIG(shortcut)
     qmlRegisterType<QQuickShortcut>("QtQuick", 2, 5, "Shortcut");
-
     qmlRegisterType<QQuickShortcut,1>("QtQuick", 2, 6, "Shortcut");
 
     qmlRegisterType<QQuickShortcut,9>("QtQuick", 2, 9, "Shortcut");
+#endif
 }
diff --git a/src/quick/util/util.pri b/src/quick/util/util.pri
index 22f23f7598..56eb8ea3b7 100644
--- a/src/quick/util/util.pri
+++ b/src/quick/util/util.pri
@@ -26,7 +26,6 @@ SOURCES += \
     $$PWD/qquickanimatorcontroller.cpp \
     $$PWD/qquickfontmetrics.cpp \
     $$PWD/qquicktextmetrics.cpp \
-    $$PWD/qquickshortcut.cpp \
     $$PWD/qquickvalidator.cpp
 
 !contains(QT_CONFIG, no-qml-debug): SOURCES += $$PWD/qquickprofiler.cpp
@@ -63,9 +62,15 @@ HEADERS += \
     $$PWD/qquickprofiler_p.h \
     $$PWD/qquickfontmetrics_p.h \
     $$PWD/qquicktextmetrics_p.h \
-    $$PWD/qquickshortcut_p.h \
     $$PWD/qquickvalidator_p.h
 
+qtConfig(shortcut) {
+    SOURCES += \
+        $$PWD/qquickshortcut.cpp
+    HEADERS += \
+        $$PWD/qquickshortcut_p.h
+}
+
 qtConfig(quick-path) {
     SOURCES += \
         $$PWD/qquickpath.cpp \