[Interest] Issues with QT5 demos on i.MX6 (arm - vivanteGPU)

Francisco Carrillo chisco at gmail.com
Thu Mar 14 16:33:52 CET 2013


Thank you Thomas for your answers!

yes  you are right, we are using EGLFS.

OK now i understand!,we will forget about hellogl-es2 on eflfs, and   we
will try to see why the demos are not working on wayland-egl platform then,
 it should be some integration issue.

Thank you very much!


On Thu, Mar 14, 2013 at 4:36 AM, Thomas Senyk
<thomas.senyk at pelagicore.com>wrote:

> On Wed, March 13, 2013 16:55:00 Francisco Carrillo wrote:
> > Hello Dear Qt Experts
> >
> >
> >
> > I am running into some strange issues with Qt5. I have encountered the
> > issues  with a version I built myself.  I've searched the forums and
> don't
> > see any discussion of these issues, though I was searching by error
> message
> > and might have missed something.
> >
> > These issues can be seen in the Qt OpenGL examples.  "hellogl_es2" and
> > "2dpaint" seem to display one rendered frame and then break --
> > "hellogl_es2" shows the QT word and bubbles, and the GUI is hidden, while
> > "2dpaint" just shows the openGL version without label.
> >
> > It seems that when including  a QGLWidget on a form, the QGLWidget would
> > work OK, but the rest of the form would not appear. I couldn't click any
> > buttons or do anything.
> >
> >
> > Along with these problems I would also see one or more of these error
> > messages in the output:
> >
> > * This plugin does not support setParent!
> > * This plugin does not support propagateSizeHints()
> > * QOpenGLContext::swapBuffers() called with non-opengl surface
>
> You should have mentioned which platform plugin you're using.
> I strongly suspect eglfs?
> If so:
> NO hellogl_es2 on eglfs-platform-plugin!!
> It's not working, it's not intended to work, it will never work!
>
> Try "hellowindow"-example ...it has no surrounding qwidget controls, and
> that's what you want on eglfs: one single on-screen (opengl-)surface!
>
> >
> >
>  ---------------------------------------------------------------------------
> > --------------------------------------------------
> >
> >
> >
> > If I try with my wayland rootfs, the story is different "hellogl_es2"
> demo
> > will show one good frame and keep it freezed in the background while the
> > animation continues on top of that, the problem is that it flickers
> between
> > background and animation and it looks horrible.
>
> Guess that part is better answered by the wayland guys
>  ... but to give me 5cents:
> A full windowing-system integration should support the mixture of all
> types of
> QSurface (in this case one top-level QWidget and a QGLWidget) instances
> within
> one QWindow (right?)... so it should work .. eventualy ;)
>
>
> ... also: try "hellowindow"
> >
> >
> >
> >
> >
> >
> > Do you have any hint or idea what could be wrong?
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