[Interest] glGetString from QML-based Wayland compositor

[Samuel Rødal]

On 12/28/2012 09:53 AM, Pier Luigi wrote:
> Hi,
>
> I'm working on a QML-based compositor and I would like to print some
> EGL and GL strings when it starts to get more useful information when
> something doesn't work.
>
> The compositor, although loaded from a plugin, is very much like the
> qmlcompositor example; this means it creates a QQuickView and load the
> main .qml file.
>
> EGL is fine: after the creation of the QQuickView I get a EGLDisplay
> using the platform native interface and print some EGL info
> successfully.
>
> However glGetString() always return NULL, I call it from the
> sceneGraphInitialized() slot and I noticed that despite
> openglContext() returns a valid pointer,
> QOpenGLContext::currentContext() is 0.
>
> Someone has an idea on what I'm doing wrong?

On which thread do you execute the slot connected to 
sceneGraphInitialized() ? The scene graph might run on a separate thread 
from the main UI thread, and the QOpenGLContext will then be made 
current there.

--
Samuel