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Using glReadPixels

Hi,
I've just tried to use glReadPixels and all I get are hard crashes... I'm on
linux but I'm pretty sure my problem comes from OpenGL, so there should be no
problem to help me...

here's the code:
GLbyte *thePixels;
glReadBuffer(GL_FRONT_LEFT); // Is this necessary since I read from the default
buffer?
glReadPixels(10,10, 10,10, GL_RGBA, GL_BYTE, &thePixels);
cout << (int)thePixels[0] << endl;

This is included in an actual working program, I'm trying to capture the
image... And it crashes really hard; gives a segmentation fault when used
without acceleration and "fxmesa: Received a not handled signal 11" when using
acceleration...

Any ideas? Hints? Tips? Tricks?

Thanks,
Simon

--
+-------------------------+----------------------------------+
| Simon Lemieux | Website : http://www.666Mhz.net |
| Email : email@hidden | POV-Ray, OpenGL, C++ and more... |
+-------------------------+----------------------------------+
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