[Interest] QQuickRenderControl example not working on Desktop OSX (Qt 5.4 Alpha)

[Gunnar Sletta]

On 16 Oct 2014, at 09:45, Roberto Garrido Martín <robertogarridomartin at gmail.com> wrote:

> Hi all,
> We have our OpenGL ES 2.0 based renderer. Until now, we were integrating it into our Qt app by using a QML Item/Node configuration, but the new rendercontrol API in Qt 5.4 Alpha seems to be a more flexible solution, and the proper way to integrate.

Be aware of that if you use the rendercontrol API you will be on a single thread and will miss out on the parallelization that the threaded render loop has, including the render thread animations.

The best point of integration for a native GL renderer will in most cases be to use QQuickWindow::beforeRendering() and render into the GL context of the window.

cheers,
Gunnar

> 
> I’m running the rendercontrol example distributed with the 5.4 Alpha, and I can only see a white rotating cube, but the QML scene of the app is supposed to be rendered on each of the sides of the cube.
> 
> I have used the OpenGL profiler, and there is one texture created, but with no contents on it.
> 
> I’m using Mac OSX 10.9.5.
> 
> Any ideas?
> 
> Here a screenshot: https://dl.dropboxusercontent.com/u/6132766/rendercontrolAPI_resized.jpg
> 
> 
> Thanks,
> Robert.
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