Added QWindow::requestedFormat()

Change-Id: I9e69ddd8ceefeda87216fb3d2507c40bc7220cf5
Reviewed-on: http://codereview.qt-project.org/5846
Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: Samuel Rødal <samuel.rodal@nokia.com>

src/gui/kernel/qwindow.cpp

@@ -234,6 +234,21 @@ void QWindow::setFormat(const QSurfaceFormat &format)
     d->requestedFormat = format;
 }
 
+
+/*!
+    Returns the requested surfaceformat of this window.
+
+    If the requested format was not supported by the platform implementation,
+    the requestedFormat will differ from the actual window format.
+
+    \sa format.
+ */
+QSurfaceFormat QWindow::requestedFormat() const
+{
+    Q_D(const QWindow);
+    return d->requestedFormat;
+}
+
 QSurfaceFormat QWindow::format() const
 {
     Q_D(const QWindow);

src/gui/kernel/qwindow.h

@@ -112,6 +112,7 @@ public:
 
     void setFormat(const QSurfaceFormat &format);
     QSurfaceFormat format() const;
+    QSurfaceFormat requestedFormat() const;
 
     void setWindowFlags(Qt::WindowFlags flags);
     Qt::WindowFlags windowFlags() const;