[Qt-interest] QGLWidget 30 fps maximum on Windows XP

[andy fillebrown]

I should add that every example I've tried from qml, qt3d, and other
various qt-labs projects -- all max out at 30 fps, too.  Is 30 fps the
max on Windows XP?   Does anybody know of a project I can look at that
does animations faster than 30 fps?

Cheers,
~ andy.f



On Mon, Jan 17, 2011 at 11:40 PM, andy fillebrown
<andy.fillebrown at gmail.com> wrote:
> Hi all,
>
> I'm trying to get a QGLWidget to swap buffers at 60 fps (the monitor
> refresh rate), but it seems no matter what I try, the fps maxes out at
> 30 fps. If I drag a corner of the window to resize the main window
> containing the QGLWidget, the fps jumps and starts approaching 60 fps,
> but as soon as I stop dragging the fps drops back down to a rock-solid
> 30 fps.
>
> I've read that "window manager" may be responsible for such a low
> frame-rate, but I'm not sure what that means or if it's even relevant
> (there's so much conflicting info re: opengl out there -- so many
> things to try that don't work).
>
> Does anyone know what's going on -- why is the fps seemingly locked to 30 fps?
>
> Frustrated,
> ~ andy.f
>