Initialize the graphics system before creating the style.

Previously if the style was creating any pixmaps they were going to the
createDefaultPixmapData() function which creates a default platform
pixmap without considering the graphics system. If these pixmaps are
used they may end up going through a suboptimal code path because they
are not the same type of pixmap that is expected by the graphics
system. The fix here is to intialize the graphics system before the
style is created.

Reviewed-by: Trond

1 files changed, 8 insertions, 6 deletions

diff --git a/src/gui/kernel/qapplication.cpp b/src/gui/kernel/qapplication.cpp
index 4fe3900..e480696 100644
--- a/src/gui/kernel/qapplication.cpp
+++ b/src/gui/kernel/qapplication.cpp
@@ -892,6 +892,14 @@ void QApplicationPrivate::initialize()
 {
     QWidgetPrivate::mapper = new QWidgetMapper;
     QWidgetPrivate::allWidgets = new QWidgetSet;
+
+#if !defined(Q_WS_X11) && !defined(Q_WS_QWS)
+    // initialize the graphics system - on X11 this is initialized inside
+    // qt_init() in qapplication_x11.cpp because of several reasons.
+    // On QWS, the graphics system is set by the QScreen plugin.
+    graphics_system = QGraphicsSystemFactory::create(graphics_system_name);
+#endif
+
     if (qt_appType != QApplication::Tty)
         (void) QApplication::style();  // trigger creation of application style
     // trigger registering of QVariant's GUI types
@@ -926,12 +934,6 @@ void QApplicationPrivate::initialize()
     // Set up which span functions should be used in raster engine...
     qInitDrawhelperAsm();
 
-#if !defined(Q_WS_X11) && !defined(Q_WS_QWS)
-    // initialize the graphics system - on X11 this is initialized inside
-    // qt_init() in qapplication_x11.cpp because of several reasons.
-    // On QWS, the graphics system is set by the QScreen plugin.
-    graphics_system = QGraphicsSystemFactory::create(graphics_system_name);
-#endif
 #ifndef QT_NO_WHEELEVENT
     QApplicationPrivate::wheel_scroll_lines = 3;
 #endif