How to use GLUT with libdispatch?

Question

Both GLUT and libdispatch have their own event-handling loops, which are invoked with functions that never return: glutMainLoop(); and dispatch_main();, respectively.

I've tried:

dispatch_queue_t q = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0);
dispatch_async(q, ^{
    glutMainLoop();
});

dispatch_main();

...and the window displays, but does not respond to any events or redraw after the initial call to the function specified with glutDisplayFunc().

How can I get GLUT and libdispatch to play nicely together?

wow. `glut` is still in use? I am getting a nostalgic feeling... Is this for a cross-platform project? — Lorenz Lo Sauer, Sep 23 '12 at 15:29
I'm just looking for a simple way to bring up a window into which to render OpenGL, using C only (no Objective-C). — smokris, Sep 23 '12 at 17:43

score 2 · Accepted Answer · answered Sep 23 '12 at 18:30

2

You can't. Both of them want to own the message processing loop. And since there's only one such loop, they can't both own it.

If you used FreeGLUT, you could find a way to make that work. But a better alternative would be to just use GLFW.

answered Sep 23 '12 at 18:30

Nicol Bolas

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Thanks. GLFW indeed looks like a better option. – smokris Sep 23 '12 at 19:14
GLFW isn't working with libdispatch either — see followup on http://stackoverflow.com/q/12570394/64860. – smokris Sep 24 '12 at 18:04

How to use GLUT with libdispatch?

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