PyGLUT 1.43 segfaults if one tries to call glutDisplayFunc, glutOverlayDisplay, glutKeyboardFunc, glutSpecialFunc, glutMouseFunc, glutMotionFunc, glutPassiveMotionFunc, glutVisibilityFunc before calling glutCreateWindow. glutIdleFunc succeeds, though. I haven't tested the other callbacks, but I'd imagine the ones which have to do with X Window interaction would crash.
I imagine this has to do with uninitialized X Window-related variables, and has a simple workaround: not making the mistake of not creating the window.
This isn't a particularly severe bug, but I imagine PyGLUT could raise an exception, which is much more developer-friendly than just segfaulting.
The following code crashes:
#!/usr/bin/env python
from OpenGL.GLUT import *
import sys
def display(): pass
glutInit(sys.argv)
glutInitDisplayMode(0)
glutInitWindowSize(500,500)
glutInitWindowPosition(0,0)
glutDisplayFunc(display)
glutCreateWindow("Bug")
##########
swapping the last two lines of the script obviously fixes it, but as I said above, I don't believe this is a proper solution.
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Okay, this is now fixed in CVS. A RuntimeError is raised if
glutGetWindow returns 0 (i.e. there's no current window)
when a glutXXXFunc function is called. I wasn't able to
figure out _why_ this was causing a crash, it should have
just ignored the registered functions :( .
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