[Interest] Utilizing the GPU, how to start?

Kai Koehne Kai.Koehne at qt.io
Wed Jul 6 09:53:28 CEST 2016

> -----Original Message-----
> From: Interest [mailto:interest-bounces+kai.koehne=qt.io at qt-project.org]
> [...]
> Multimedia and web rendering are a different story.  Others are better
> qualified to comment on the details of how WebEngine, QtMultimedia, and
> the older alternatives are implemented - but they are all wrappers around
> other libraries.  Just because widgets don’t render their own pixels on the
> GPU doesn’t mean those libraries can’t render the framed content on the
> GPU, AFAIK.  At least theoretically, but I’m not up-to-date on whether the
> widget implementations are currently doing that efficiently.

QWeb_Engine_View indeed uses Qt Quick (and therefore potentially
the GPU) underneath , even for the widgets integration. So it might be worth
a try porting your app from Qt WebKit to Qt WebEngine (if only because 
Qt WebKit is deprecated).

For the video, it looks like QVideoWidget might benefit from OpenGL if
it's parent is a QOpenGL widget. Maybe you can experiment with this.
(I don't have first hand experience with QVideoWidget though).



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