[Qt-qml] hardware acceleration and qml

[Ivan De Marino]

I make my View + Scene and I add my QML Engine.
And I do use a parentless fullscreen QGraphicsView.
But I'll definitely try out this extra flag ;)

Thanks for the Hint
Ivan

On 28 June 2010 14:10, <mathias.malmqvist at nokia.com> wrote:

>
> > I can testify.
> > Same animations and transformations done with QML, with OpenGL-enabled
> > QGraphicsView go MUCH FASTER (particularly on Device).
>
> If your application is a full-screen one and you run it with the qmlviewer,
> then
> make sure you specify the -frameless flag (in addition to the -fullscreen).
> This
> makes a huge difference to performance when running on N900.
>
>
> Cheers
> Mathias
>
> ________________________________________
> From: qt-qml-bounces at trolltech.com [qt-qml-bounces at trolltech.com] On
> Behalf Of ext Ivan De Marino [ivan.de.marino at gmail.com]
> Sent: Friday, June 25, 2010 2:17 PM
> To: Allison Warwick (Nokia-D-Qt/Brisbane)
> Cc: qt-qml at trolltech.com
> Subject: Re: [Qt-qml] hardware acceleration and qml
>
> I can testify.
> Same animations and transformations done with QML, with OpenGL-enabled
> QGraphicsView go MUCH FASTER (particularly on Device).
> But there are few drawbacks:
> - You need to have the entire View redrawn entirely for good quality (but
> that's ok: you are using OpenGL after all)
> - Font Anti-aliasing sucks and gets worse if you apply transformations to
> the Text
>
> On 23 June 2010 00:52, <warwick.allison at nokia.com<mailto:
> warwick.allison at nokia.com>> wrote:
> > I'd like to know more about the support for hardware acceleration in
> > qml. I remember an overview focused on it but in the last snapshot
> > documentation I can't find it. Is there a reason? Where I can find the
> > supported platforms?
>
> QML builds directly upon QGraphicsView, which in turn builds upon QPainter,
> which in turn builds upon QPaintEngine (and the internal QGraphicsSystem
> classes), which have various hardware accelerated implementations.
>
> --
> Warwick
>
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>
>
> --
> Ivan De Marino | Software Engineer | France Telecom R&D UK - Orange Labs
> w. +44 20 8849 5806 | m. +44 7515 955 861 | m. +44 7974 156 216
> ivan[dot]demarino[at]orange-ftgroup.com<http://orange-ftgroup.com> |
> ivan[dot]de[dot]marino[at]gmail[dot]com
> www.detronizator.org<http://www.detronizator.org> |
> www.linkedin.com/in/ivandemarino<http://www.linkedin.com/in/ivandemarino>
>



-- 
Ivan De Marino | Software Engineer | France Telecom R&D UK - Orange Labs
w. +44 20 8849 5806 | m. +44 7515 955 861 | m. +44 7974 156 216
ivan[dot]demarino[at]orange-ftgroup.com |
ivan[dot]de[dot]marino[at]gmail[dot]com
www.detronizator.org | www.linkedin.com/in/ivandemarino
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