Qt5.1 Android : OpenGL in QWidget

[user28]

Hi All,

I am investigating if there is any pathway to temporarily work around the QGLWidget fullscreen issue on android.
Currently , in Qt5.1 android, only one full screen opengl surface is provided. The application that I am currently porting to android is heavily dependent on QWidgets. So, rewriting it in QML is not feasible.

I have been trying to render opengl content in QWidget directly and not use QGLWidget/QGraphicsView.

I have tried the below options.

• Create a QML window to render opengl and embed it in QWidget using createWindowContainer().
  -- Does not work on android in QT5.1
• Use QWindow with QOpenGLContext to render opengl and embed it in QWidget using createWindowContainer(). -- Does not work on android in QT5.1
• Use standard opengl calls in QWidget and create an opengl surface and render opengl content using it.
  I am currently stuck with getting native window handle of QWidget to pass to eglCreateWindowSurface(). On windows this could be done by getting QWidget::winId(). winId() does not return proper value on android. I have been looking at Qt's opengl and raster plugin source code. The opengl plugin stores nativewindow obtained with ANativeWindow_fromSurface(). There is no such code in raster plugin.
  Is there any way to get EGLNativeWindowType* handle of QWidget on android?

I would appreciate any suggestion on rendering opengl directly in QWidget so that I could use it along with other GUI widgets.