[Qt-interest] QGraphicsScene - OpenGL glBegin/glEnd

[fungos]

Hi, anybody can explain me how OpenGL QGraphicsScene works with
glBegin/glEnd (when they happen)?

My problem is: QMainWindow has a QWidget that is QGraphicsScene, but
then at initialization after all Qt code initialization, I have
another class that is a Renderer and its initialization calls
glGetString that returns an error: GL_INVALID_OPERATION is generated
if glGetString is executed between the execution of glBegin and the
corresponding execution of glEnd.

As I'm integrating a graphics engine inside a Qt window, how can I
handle these kind of issues without messing too much with the graphics
engine?

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Animal Frontline Liberation