Merge branch 4.7 into qt-master-from-4.7

4 files changed, 19 insertions, 8 deletions

diff --git a/src/gui/painting/qpainterpath.cpp b/src/gui/painting/qpainterpath.cpp
index 7d6ea12..3a9afe1 100644
--- a/src/gui/painting/qpainterpath.cpp
+++ b/src/gui/painting/qpainterpath.cpp
@@ -1204,7 +1204,8 @@ void QPainterPath::connectPath(const QPainterPath &other)
     int first = d->elements.size();
     d->elements += other.d_func()->elements;
 
-    d->elements[first].type = LineToElement;
+    if (first != 0)
+        d->elements[first].type = LineToElement;
 
     // avoid duplicate points
     if (first > 0 && QPointF(d->elements[first]) == QPointF(d->elements[first - 1])) {
diff --git a/src/opengl/qwindowsurface_gl.cpp b/src/opengl/qwindowsurface_gl.cpp
index 6185ff8..2876906 100644
--- a/src/opengl/qwindowsurface_gl.cpp
+++ b/src/opengl/qwindowsurface_gl.cpp
@@ -302,6 +302,7 @@ struct QGLWindowSurfacePrivate
 };
 
 QGLFormat QGLWindowSurface::surfaceFormat;
+QGLWindowSurface::SwapMode QGLWindowSurface::swapBehavior = QGLWindowSurface::AutomaticSwap;
 
 void QGLWindowSurfaceGLPaintDevice::endPaint()
 {
@@ -576,6 +577,9 @@ void QGLWindowSurface::flush(QWidget *widget, const QRegion &rgn, const QPoint &
     const GLenum target = GL_TEXTURE_2D;
     Q_UNUSED(target);
 
+    if (QGLWindowSurface::swapBehavior == QGLWindowSurface::KillSwap)
+        return;
+
     if (context()) {
         context()->makeCurrent();
 
@@ -623,7 +627,14 @@ void QGLWindowSurface::flush(QWidget *widget, const QRegion &rgn, const QPoint &
                 }
             }
 #endif
-            bool doingPartialUpdate = hasPartialUpdateSupport() && br.width() * br.height() < parent->geometry().width() * parent->geometry().height() * 0.2;
+            bool doingPartialUpdate = false;
+            if (QGLWindowSurface::swapBehavior == QGLWindowSurface::AutomaticSwap)
+                doingPartialUpdate = hasPartialUpdateSupport() && br.width() * br.height() < parent->geometry().width() * parent->geometry().height() * 0.2;
+            else if (QGLWindowSurface::swapBehavior == QGLWindowSurface::AlwaysFullSwap)
+                doingPartialUpdate = false;
+            else if (QGLWindowSurface::swapBehavior == QGLWindowSurface::AlwaysPartialSwap)
+                doingPartialUpdate = hasPartialUpdateSupport();
+
             QGLContext *ctx = reinterpret_cast<QGLContext *>(parent->d_func()->extraData()->glContext);
             if (widget != window()) {
                 if (initializeOffscreenTexture(window()->size()))
diff --git a/src/opengl/qwindowsurface_gl_p.h b/src/opengl/qwindowsurface_gl_p.h
index 22bd5f0..09a6a30 100644
--- a/src/opengl/qwindowsurface_gl_p.h
+++ b/src/opengl/qwindowsurface_gl_p.h
@@ -112,6 +112,9 @@ public:
 
     static QGLFormat surfaceFormat;
 
+    enum SwapMode { AutomaticSwap, AlwaysFullSwap, AlwaysPartialSwap, KillSwap };
+    static SwapMode swapBehavior;
+
 private slots:
     void deleted(QObject *object);
 
diff --git a/src/plugins/graphicssystems/meego/qmeegographicssystem.cpp b/src/plugins/graphicssystems/meego/qmeegographicssystem.cpp
index 4a86082..b1a8f5f7 100644
--- a/src/plugins/graphicssystems/meego/qmeegographicssystem.cpp
+++ b/src/plugins/graphicssystems/meego/qmeegographicssystem.cpp
@@ -75,6 +75,8 @@ QMeeGoGraphicsSystem::~QMeeGoGraphicsSystem()
 
 QWindowSurface* QMeeGoGraphicsSystem::createWindowSurface(QWidget *widget) const
 {
+    QGLShareContextScope ctx(qt_gl_share_widget()->context());
+
     QMeeGoGraphicsSystem::surfaceWasCreated = true;
     QWindowSurface *surface = new QGLWindowSurface(widget);
     return surface;
@@ -82,12 +84,6 @@ QWindowSurface* QMeeGoGraphicsSystem::createWindowSurface(QWidget *widget) const
 
 QPixmapData *QMeeGoGraphicsSystem::createPixmapData(QPixmapData::PixelType type) const
 {
-    // Long story short: without this it's possible to hit an
-    // uninitialized paintDevice due to a Qt bug too complex to even
-    // explain here... not to mention fix without going crazy.
-    // MDK
-    QGLShareContextScope ctx(qt_gl_share_widget()->context());
-
     return new QRasterPixmapData(type);
 }