Merge branch '4.7' of scm.dev.nokia.troll.no:qt/oslo-staging-2 into 4.7-integration

* '4.7' of scm.dev.nokia.troll.no:qt/oslo-staging-2:
  Some QWindowSurface implementations might implement flush as a buffer
  Set EGL_SWAP_BEHAVIOR to EGL_BUFFER_PRESERVED for regular QWidgets
  Cleanup & remove unused function overloads from QEgl* APIs
  QScrollArea: Excessive scrolling in focusNextPrevChild()

15 files changed, 147 insertions, 128 deletions

diff --git a/src/gui/egl/qegl.cpp b/src/gui/egl/qegl.cpp
index 0fe5cbe..bf9f530 100644
--- a/src/gui/egl/qegl.cpp
+++ b/src/gui/egl/qegl.cpp
@@ -484,42 +484,6 @@ bool QEglContext::swapBuffers(EGLSurface surface)
     return ok;
 }
 
-// Wait for native rendering operations to complete before starting
-// to use OpenGL/OpenVG operations.
-void QEglContext::waitNative()
-{
-#ifdef EGL_CORE_NATIVE_ENGINE
-    eglWaitNative(EGL_CORE_NATIVE_ENGINE);
-#endif
-}
-
-// Wait for client OpenGL/OpenVG operations to complete before
-// using native rendering operations.
-void QEglContext::waitClient()
-{
-#ifdef EGL_OPENGL_ES_API
-    if (apiType == QEgl::OpenGL) {
-        eglBindAPI(EGL_OPENGL_ES_API);
-        eglWaitClient();
-    }
-#else
-    if (apiType == QEgl::OpenGL)
-        eglWaitGL();
-#endif
-#ifdef EGL_OPENVG_API
-    if (apiType == QEgl::OpenVG) {
-        eglBindAPI(EGL_OPENVG_API);
-        eglWaitClient();
-    }
-#endif
-}
-
-// Query the value of a configuration attribute.
-bool QEglContext::configAttrib(int name, EGLint *value) const
-{
-    return eglGetConfigAttrib(QEgl::display(), cfg, name, value);
-}
-
 int QEglContext::configAttrib(int name) const
 {
     EGLint value;
@@ -530,12 +494,6 @@ int QEglContext::configAttrib(int name) const
         return EGL_DONT_CARE;
 }
 
-QEglProperties QEglContext::configProperties() const
-{
-    return QEglProperties(config());
-}
-
-
 typedef EGLImageKHR (EGLAPIENTRY *_eglCreateImageKHR)(EGLDisplay, EGLContext, EGLenum, EGLClientBuffer, const EGLint*);
 typedef EGLBoolean (EGLAPIENTRY *_eglDestroyImageKHR)(EGLDisplay, EGLImageKHR);
 
@@ -673,22 +631,6 @@ QString QEgl::errorString(EGLint code)
     }
 }
 
-QString QEgl::errorString()
-{
-    return errorString(error());
-}
-
-void QEgl::clearError()
-{
-    eglGetError();
-}
-
-EGLint QEgl::error()
-{
-    return eglGetError();
-}
-
-
 // Dump all of the EGL configurations supported by the system.
 void QEgl::dumpAllConfigs()
 {
diff --git a/src/gui/egl/qegl_p.h b/src/gui/egl/qegl_p.h
index 6345d5d..83bdb5e 100644
--- a/src/gui/egl/qegl_p.h
+++ b/src/gui/egl/qegl_p.h
@@ -182,10 +182,7 @@ namespace QEgl {
 
     Q_GUI_EXPORT void dumpAllConfigs();
 
-    Q_GUI_EXPORT void clearError();
-    Q_GUI_EXPORT EGLint error();
-    Q_GUI_EXPORT QString errorString(EGLint code);
-    Q_GUI_EXPORT QString errorString();
+    Q_GUI_EXPORT QString errorString(EGLint code = eglGetError());
 
     Q_GUI_EXPORT QString extensions();
     Q_GUI_EXPORT bool hasExtension(const char* extensionName);
diff --git a/src/gui/egl/qeglcontext_p.h b/src/gui/egl/qeglcontext_p.h
index 7eec7eb..ccde00d 100644
--- a/src/gui/egl/qeglcontext_p.h
+++ b/src/gui/egl/qeglcontext_p.h
@@ -85,10 +85,6 @@ public:
     bool lazyDoneCurrent();
     bool swapBuffers(EGLSurface surface);
 
-    void waitNative();
-    void waitClient();
-
-    bool configAttrib(int name, EGLint *value) const;
     int  configAttrib(int name) const;
 
     EGLContext context() const { return ctx; }
@@ -99,8 +95,6 @@ public:
     EGLConfig config() const { return cfg; }
     void setConfig(EGLConfig config) { cfg = config; }
 
-    QEglProperties configProperties() const;
-
 private:
     QEgl::API apiType;
     EGLContext ctx;
diff --git a/src/gui/egl/qeglproperties.cpp b/src/gui/egl/qeglproperties.cpp
index b34d2c3..3638de5 100644
--- a/src/gui/egl/qeglproperties.cpp
+++ b/src/gui/egl/qeglproperties.cpp
@@ -241,6 +241,9 @@ void QEglProperties::setRenderableType(QEgl::API api)
 // reductions in complexity are possible.
 bool QEglProperties::reduceConfiguration()
 {
+    if (value(EGL_SWAP_BEHAVIOR) != EGL_DONT_CARE)
+        removeValue(EGL_SWAP_BEHAVIOR);
+
 #ifdef EGL_VG_ALPHA_FORMAT_PRE_BIT
     // For OpenVG, we sometimes try to create a surface using a pre-multiplied format. If we can't
     // find a config which supports pre-multiplied formats, remove the flag on the surface type:
@@ -292,20 +295,6 @@ static void addTag(QString& str, const QString& tag)
     str += tag;
 }
 
-void QEglProperties::dumpAllConfigs()
-{
-    EGLint count = 0;
-    eglGetConfigs(QEgl::display(), 0, 0, &count);
-    if (count < 1)
-        return;
-
-    EGLConfig *configs = new EGLConfig [count];
-    eglGetConfigs(QEgl::display(), configs, count, &count);
-    for (EGLint index = 0; index < count; ++index)
-        qWarning() << QEglProperties(configs[index]).toString();
-    delete [] configs;
-}
-
 // Convert a property list to a string suitable for debug output.
 QString QEglProperties::toString() const
 {
diff --git a/src/gui/egl/qeglproperties_p.h b/src/gui/egl/qeglproperties_p.h
index eebcf72..b1f9642 100644
--- a/src/gui/egl/qeglproperties_p.h
+++ b/src/gui/egl/qeglproperties_p.h
@@ -90,8 +90,6 @@ public:
 
     QString toString() const;
 
-    static void dumpAllConfigs();
-
 private:
     QVarLengthArray<int> props;
 };
diff --git a/src/gui/painting/qbackingstore.cpp b/src/gui/painting/qbackingstore.cpp
index 8de9eaa..f9cd59b 100644
--- a/src/gui/painting/qbackingstore.cpp
+++ b/src/gui/painting/qbackingstore.cpp
@@ -263,7 +263,7 @@ bool QWidgetBackingStore::bltRect(const QRect &rect, int dx, int dy, QWidget *wi
 {
     const QPoint pos(tlwOffset + widget->mapTo(tlw, rect.topLeft()));
     const QRect tlwRect(QRect(pos, rect.size()));
-    if (dirty.intersects(tlwRect))
+    if (fullUpdatePending || dirty.intersects(tlwRect))
         return false; // We don't want to scroll junk.
     return windowSurface->scroll(tlwRect, dx, dy);
 }
@@ -402,7 +402,7 @@ QRegion QWidgetBackingStore::dirtyRegion(QWidget *widget) const
     const bool widgetDirty = widget && widget != tlw;
     const QRect tlwRect(topLevelRect());
     const QRect surfaceGeometry(windowSurface->geometry());
-    if (surfaceGeometry != tlwRect && surfaceGeometry.size() != tlwRect.size()) {
+    if (fullUpdatePending || (surfaceGeometry != tlwRect && surfaceGeometry.size() != tlwRect.size())) {
         if (widgetDirty) {
             const QRect dirtyTlwRect = QRect(QPoint(), tlwRect.size());
             const QPoint offset(widget->mapTo(tlw, QPoint()));
@@ -555,6 +555,18 @@ void QWidgetBackingStore::markDirty(const QRegion &rgn, QWidget *widget, bool up
         return;
     }
 
+    if (fullUpdatePending) {
+        if (updateImmediately)
+            sendUpdateRequest(tlw, updateImmediately);
+        return;
+    }
+
+    if (!windowSurface->hasPartialUpdateSupport()) {
+        fullUpdatePending = true;
+        sendUpdateRequest(tlw, updateImmediately);
+        return;
+    }
+
     const QPoint offset = widget->mapTo(tlw, QPoint());
     const QRect widgetRect = widget->d_func()->effectiveRectFor(widget->rect());
     if (qt_region_strictContains(dirty, widgetRect.translated(offset))) {
@@ -638,6 +650,18 @@ void QWidgetBackingStore::markDirty(const QRect &rect, QWidget *widget, bool upd
         return;
     }
 
+    if (fullUpdatePending) {
+        if (updateImmediately)
+            sendUpdateRequest(tlw, updateImmediately);
+        return;
+    }
+
+    if (!windowSurface->hasPartialUpdateSupport()) {
+        fullUpdatePending = true;
+        sendUpdateRequest(tlw, updateImmediately);
+        return;
+    }
+
     const QRect widgetRect = widget->d_func()->effectiveRectFor(rect);
     const QRect translatedRect(widgetRect.translated(widget->mapTo(tlw, QPoint())));
     if (qt_region_strictContains(dirty, translatedRect)) {
@@ -833,6 +857,7 @@ void QWidgetBackingStore::updateLists(QWidget *cur)
 
 QWidgetBackingStore::QWidgetBackingStore(QWidget *topLevel)
     : tlw(topLevel), dirtyOnScreenWidgets(0), hasDirtyFromPreviousSync(false)
+    , fullUpdatePending(0)
 {
     windowSurface = tlw->windowSurface();
     if (!windowSurface)
@@ -1122,6 +1147,7 @@ void QWidgetBackingStore::sync()
             for (int i = 0; i < dirtyWidgets.size(); ++i)
                 resetWidget(dirtyWidgets.at(i));
             dirtyWidgets.clear();
+            fullUpdatePending = false;
         }
         return;
     }
@@ -1132,28 +1158,28 @@ void QWidgetBackingStore::sync()
     const QRect surfaceGeometry(windowSurface->geometry());
     bool repaintAllWidgets = false;
 
-    if (inTopLevelResize || surfaceGeometry != tlwRect) {
-        if ((inTopLevelResize || surfaceGeometry.size() != tlwRect.size()) && !updatesDisabled) {
-            if (hasStaticContents()) {
-                // Repaint existing dirty area and newly visible area.
-                const QRect clipRect(0, 0, surfaceGeometry.width(), surfaceGeometry.height());
-                const QRegion staticRegion(staticContents(0, clipRect));
-                QRegion newVisible(0, 0, tlwRect.width(), tlwRect.height());
-                newVisible -= staticRegion;
-                dirty += newVisible;
-                windowSurface->setStaticContents(staticRegion);
-            } else {
-                // Repaint everything.
-                dirty = QRegion(0, 0, tlwRect.width(), tlwRect.height());
-                for (int i = 0; i < dirtyWidgets.size(); ++i)
-                    resetWidget(dirtyWidgets.at(i));
-                dirtyWidgets.clear();
-                repaintAllWidgets = true;
-            }
+    if ((fullUpdatePending || inTopLevelResize || surfaceGeometry.size() != tlwRect.size()) && !updatesDisabled) {
+        if (hasStaticContents()) {
+            // Repaint existing dirty area and newly visible area.
+            const QRect clipRect(0, 0, surfaceGeometry.width(), surfaceGeometry.height());
+            const QRegion staticRegion(staticContents(0, clipRect));
+            QRegion newVisible(0, 0, tlwRect.width(), tlwRect.height());
+            newVisible -= staticRegion;
+            dirty += newVisible;
+            windowSurface->setStaticContents(staticRegion);
+        } else {
+            // Repaint everything.
+            dirty = QRegion(0, 0, tlwRect.width(), tlwRect.height());
+            for (int i = 0; i < dirtyWidgets.size(); ++i)
+                resetWidget(dirtyWidgets.at(i));
+            dirtyWidgets.clear();
+            repaintAllWidgets = true;
         }
-        windowSurface->setGeometry(tlwRect);
     }
 
+    if (inTopLevelResize || surfaceGeometry != tlwRect)
+        windowSurface->setGeometry(tlwRect);
+
     if (updatesDisabled)
         return;
 
@@ -1212,6 +1238,8 @@ void QWidgetBackingStore::sync()
     }
     dirtyWidgets.clear();
 
+    fullUpdatePending = false;
+
     if (toClean.isEmpty()) {
         // Nothing to repaint. However, we might have newly exposed areas on the
         // screen if this function was called from sync(QWidget *, QRegion)), so
diff --git a/src/gui/painting/qbackingstore_p.h b/src/gui/painting/qbackingstore_p.h
index 02c0f7c..6510b57 100644
--- a/src/gui/painting/qbackingstore_p.h
+++ b/src/gui/painting/qbackingstore_p.h
@@ -91,6 +91,7 @@ public:
     inline bool isDirty() const
     {
         return !(dirtyWidgets.isEmpty() && dirty.isEmpty() && !hasDirtyFromPreviousSync
+                 && !fullUpdatePending
 #if defined(Q_WS_QWS) && !defined(QT_NO_QWS_MANAGER)
                  && !hasDirtyWindowDecoration()
 #endif
@@ -115,7 +116,8 @@ private:
 #ifdef Q_BACKINGSTORE_SUBSURFACES
     QList<QWindowSurface*> subSurfaces;
 #endif
-    bool hasDirtyFromPreviousSync;
+    uint hasDirtyFromPreviousSync : 1;
+    uint fullUpdatePending : 1;
 
     QPoint tlwOffset;
 
diff --git a/src/gui/painting/qwindowsurface.cpp b/src/gui/painting/qwindowsurface.cpp
index 8bd6344..e18ea3f 100644
--- a/src/gui/painting/qwindowsurface.cpp
+++ b/src/gui/painting/qwindowsurface.cpp
@@ -49,13 +49,19 @@ QT_BEGIN_NAMESPACE
 class QWindowSurfacePrivate
 {
 public:
-    QWindowSurfacePrivate(QWidget *w) : window(w), staticContentsSupport(false) {}
+    QWindowSurfacePrivate(QWidget *w)
+        : window(w)
+        , staticContentsSupport(0)
+        , partialUpdateSupport(1)
+    {
+    }
 
     QWidget *window;
     QRect geometry;
     QRegion staticContents;
     QList<QImage*> bufferImages;
-    bool staticContentsSupport;
+    uint staticContentsSupport : 1;
+    uint partialUpdateSupport : 1;
 };
 
 /*!
@@ -284,6 +290,10 @@ bool QWindowSurface::hasStaticContentsSupport() const
 
 void QWindowSurface::setStaticContentsSupport(bool enable)
 {
+    if (enable && !d_ptr->partialUpdateSupport) {
+        qWarning("QWindowSurface::setStaticContentsSupport: static contents support requires partial update support");
+        return;
+    }
     d_ptr->staticContentsSupport = enable;
 }
 
@@ -302,6 +312,20 @@ bool QWindowSurface::hasStaticContents() const
     return d_ptr->staticContentsSupport && !d_ptr->staticContents.isEmpty();
 }
 
+bool QWindowSurface::hasPartialUpdateSupport() const
+{
+    return d_ptr->partialUpdateSupport;
+}
+
+void QWindowSurface::setPartialUpdateSupport(bool enable)
+{
+    if (!enable && d_ptr->staticContentsSupport) {
+        qWarning("QWindowSurface::setPartialUpdateSupport: static contents support requires partial update support");
+        return;
+    }
+    d_ptr->partialUpdateSupport = enable;
+}
+
 void qt_scrollRectInImage(QImage &img, const QRect &rect, const QPoint &offset)
 {
     // make sure we don't detach
diff --git a/src/gui/painting/qwindowsurface_p.h b/src/gui/painting/qwindowsurface_p.h
index 0a453af..e6ee5f6 100644
--- a/src/gui/painting/qwindowsurface_p.h
+++ b/src/gui/painting/qwindowsurface_p.h
@@ -90,6 +90,7 @@ public:
     inline QRect rect(const QWidget *widget) const;
 
     bool hasStaticContentsSupport() const;
+    bool hasPartialUpdateSupport() const;
 
     void setStaticContents(const QRegion &region);
     QRegion staticContents() const;
@@ -97,6 +98,7 @@ public:
 protected:
     bool hasStaticContents() const;
     void setStaticContentsSupport(bool enable);
+    void setPartialUpdateSupport(bool enable);
 
 private:
     QWindowSurfacePrivate *d_ptr;
diff --git a/src/gui/widgets/qscrollarea.cpp b/src/gui/widgets/qscrollarea.cpp
index 6b81d9f..38e799e 100644
--- a/src/gui/widgets/qscrollarea.cpp
+++ b/src/gui/widgets/qscrollarea.cpp
@@ -482,14 +482,14 @@ void QScrollArea::ensureWidgetVisible(QWidget *childWidget, int xmargin, int yma
         d->hbar->setValue(focusRect.center().x() - d->viewport->width() / 2);
     else if (focusRect.right() > visibleRect.right())
         d->hbar->setValue(focusRect.right() - d->viewport->width());
-    else
+    else if (focusRect.left() < visibleRect.left())
         d->hbar->setValue(focusRect.left());
 
     if (focusRect.height() > visibleRect.height())
         d->vbar->setValue(focusRect.center().y() - d->viewport->height() / 2);
     else if (focusRect.bottom() > visibleRect.bottom())
         d->vbar->setValue(focusRect.bottom() - d->viewport->height());
-    else
+    else if (focusRect.top() < visibleRect.top())
         d->vbar->setValue(focusRect.top());
 }
 
diff --git a/src/opengl/qgl_egl.cpp b/src/opengl/qgl_egl.cpp
index 822c9f6..0fbbbf9 100644
--- a/src/opengl/qgl_egl.cpp
+++ b/src/opengl/qgl_egl.cpp
@@ -147,7 +147,7 @@ void qt_glformat_from_eglconfig(QGLFormat& format, const EGLConfig config)
     // Clear the EGL error state because some of the above may
     // have errored out because the attribute is not applicable
     // to the surface type.  Such errors don't matter.
-    QEgl::clearError();
+    eglGetError();
 }
 
 bool QGLFormat::hasOpenGL()
diff --git a/src/opengl/qgl_x11egl.cpp b/src/opengl/qgl_x11egl.cpp
index 6f210ce..d67a3ea 100644
--- a/src/opengl/qgl_x11egl.cpp
+++ b/src/opengl/qgl_x11egl.cpp
@@ -199,6 +199,10 @@ bool QGLContext::chooseContext(const QGLContext* shareContext)
         configProps.setRenderableType(QEgl::OpenGL);
         qt_eglproperties_set_glformat(configProps, d->glFormat);
 
+        // Set buffer preserved for regular QWidgets, QGLWidgets are ok with either preserved or destroyed:
+        if ((devType == QInternal::Widget) && qobject_cast<QGLWidget*>(static_cast<QWidget*>(device())) == 0)
+            configProps.setValue(EGL_SWAP_BEHAVIOR, EGL_BUFFER_PRESERVED);
+
         if (!d->eglContext->chooseConfig(configProps, QEgl::BestPixelFormat)) {
             delete d->eglContext;
             d->eglContext = 0;
diff --git a/src/opengl/qglpixelbuffer_egl.cpp b/src/opengl/qglpixelbuffer_egl.cpp
index db9e754..0b94f5a 100644
--- a/src/opengl/qglpixelbuffer_egl.cpp
+++ b/src/opengl/qglpixelbuffer_egl.cpp
@@ -75,9 +75,9 @@ bool QGLPixelBufferPrivate::init(const QSize &size, const QGLFormat &f, QGLWidge
         ctx->setConfig(shareContext->config());
 #if QGL_RENDER_TEXTURE
         EGLint value = EGL_FALSE;
-        if (ctx->configAttrib(EGL_BIND_TO_TEXTURE_RGBA, &value) && value)
+        if (ctx->configAttrib(EGL_BIND_TO_TEXTURE_RGBA) == EGL_TRUE)
             textureFormat = EGL_TEXTURE_RGBA;
-        else if (ctx->configAttrib(EGL_BIND_TO_TEXTURE_RGB, &value) && value)
+        else if (ctx->configAttrib(EGL_BIND_TO_TEXTURE_RGB) == EGL_TRUE)
             textureFormat = EGL_TEXTURE_RGB;
 #endif
     } else {
diff --git a/src/openvg/qwindowsurface_vgegl.cpp b/src/openvg/qwindowsurface_vgegl.cpp
index 92c4371..e3f52f4e 100644
--- a/src/openvg/qwindowsurface_vgegl.cpp
+++ b/src/openvg/qwindowsurface_vgegl.cpp
@@ -71,18 +71,13 @@ VGImageFormat qt_vg_config_to_vg_format(QEglContext *context)
 
 QImage::Format qt_vg_config_to_image_format(QEglContext *context)
 {
-    EGLint red = 0;
-    EGLint green = 0;
-    EGLint blue = 0;
-    EGLint alpha = 0;
-    context->configAttrib(EGL_RED_SIZE, &red);
-    context->configAttrib(EGL_GREEN_SIZE, &green);
-    context->configAttrib(EGL_BLUE_SIZE, &blue);
-    context->configAttrib(EGL_ALPHA_SIZE, &alpha);
+    EGLint red = context->configAttrib(EGL_RED_SIZE);
+    EGLint green = context->configAttrib(EGL_GREEN_SIZE);
+    EGLint blue = context->configAttrib(EGL_BLUE_SIZE);
+    EGLint alpha = context->configAttrib(EGL_ALPHA_SIZE);
     QImage::Format argbFormat;
 #ifdef EGL_VG_ALPHA_FORMAT_PRE_BIT
-    EGLint type = 0;
-    context->configAttrib(EGL_SURFACE_TYPE, &type);
+    EGLint type = context->configAttrib(EGL_SURFACE_TYPE);
     if ((type & EGL_VG_ALPHA_FORMAT_PRE_BIT) != 0)
         argbFormat = QImage::Format_ARGB32_Premultiplied;
     else
@@ -210,11 +205,7 @@ void qt_vg_unregister_pixmap(QVGPixmapData *pd)
 
 static bool isPremultipliedContext(const QEglContext *context)
 {
-    EGLint value = 0;
-    if (context->configAttrib(EGL_SURFACE_TYPE, &value))
-        return (value & EGL_VG_ALPHA_FORMAT_PRE_BIT) != 0;
-    else
-        return false;
+    return context->configAttrib(EGL_SURFACE_TYPE) & EGL_VG_ALPHA_FORMAT_PRE_BIT;
 }
 
 #endif
diff --git a/tests/auto/qwindowsurface/tst_qwindowsurface.cpp b/tests/auto/qwindowsurface/tst_qwindowsurface.cpp
index dd985ca..7dde402 100644
--- a/tests/auto/qwindowsurface/tst_qwindowsurface.cpp
+++ b/tests/auto/qwindowsurface/tst_qwindowsurface.cpp
@@ -66,6 +66,7 @@ private slots:
     void getSetWindowSurface();
     void flushOutsidePaintEvent();
     void grabWidget();
+    void staticContentsAndPartialUpdateSupport();
 };
 
 class MyWindowSurface : public QWindowSurface
@@ -81,6 +82,8 @@ public:
         /* nothing */
     }
 
+    using QWindowSurface::setStaticContentsSupport;
+    using QWindowSurface::setPartialUpdateSupport;
 private:
     QImage image;
 };
@@ -280,6 +283,51 @@ void tst_QWindowSurface::grabWidget()
     QVERIFY(QColor(childInvalidSubImage.pixel(0, 0)) == QColor(Qt::white));
 }
 
+void tst_QWindowSurface::staticContentsAndPartialUpdateSupport()
+{
+    QWidget widget;
+    MyWindowSurface surface(&widget);
+
+    // Default values.
+    QVERIFY(surface.hasPartialUpdateSupport());
+    QVERIFY(!surface.hasStaticContentsSupport());
+
+    // Partial: YES, Static: YES
+    surface.setStaticContentsSupport(true);
+    QVERIFY(surface.hasPartialUpdateSupport());
+    QVERIFY(surface.hasStaticContentsSupport());
+
+    // Static contents requires support for partial updates.
+    // We simply ingore bad combinations and spit out a warning.
+
+    // CONFLICT: Partial: NO, Static: YES
+    QTest::ignoreMessage(QtWarningMsg, "QWindowSurface::setPartialUpdateSupport: static contents support requires partial update support");
+    surface.setPartialUpdateSupport(false);
+    QVERIFY(surface.hasPartialUpdateSupport());
+    QVERIFY(surface.hasStaticContentsSupport());
+
+    // Partial: YES, Static: NO
+    surface.setStaticContentsSupport(false);
+    QVERIFY(surface.hasPartialUpdateSupport());
+    QVERIFY(!surface.hasStaticContentsSupport());
+
+    // Partial: NO, Static: NO
+    surface.setPartialUpdateSupport(false);
+    QVERIFY(!surface.hasPartialUpdateSupport());
+    QVERIFY(!surface.hasStaticContentsSupport());
+
+    // CONFLICT: Partial: NO, Static: YES
+    QTest::ignoreMessage(QtWarningMsg, "QWindowSurface::setStaticContentsSupport: static contents support requires partial update support");
+    surface.setStaticContentsSupport(true);
+    QVERIFY(!surface.hasPartialUpdateSupport());
+    QVERIFY(!surface.hasStaticContentsSupport());
+
+    // Partial: YES, Static: NO
+    surface.setPartialUpdateSupport(true);
+    QVERIFY(surface.hasPartialUpdateSupport());
+    QVERIFY(!surface.hasStaticContentsSupport());
+}
+
 QTEST_MAIN(tst_QWindowSurface)
 
 #else // Q_WS_MAC