pygame OpenGL windows not refreshing on Mac OS X 10.6, Python 2.7

I posted this on the pygame mailing list but maybe someone here will have an answer. I can't be sure whether it's a pygame problem or an SDL problem, really.

Essentially, I have some code that uses PyOpenGL and pygame to render rudimentary animations. It works fine under Linux but for some reason, the pygame windows on my Mac don't refresh unless I click outside the windo开发者_运维知识库w to "unfocus", at which point they refresh once.

To install SDL and pygame I followed the instructions here. I should note that

• 2D pygame examples such as pygame.examples.aliens work fine, while 3D ones such as pygame.examples.glcube exhibit the same problem as my own code.
• PyOpenGL demos work fine, so I'm assuming the problem isn't there.

• I also see this printed to the console:

  2010-11-12 00:31:51.328 python[75402:903] *** __NSAutoreleaseNoPool(): 
  Object 0x101da6570 of class NSCFData autoreleased with no pool in 
  place - just leaking
  

  Anyone know what that means?

It turns out some sort of OS X driver glitch causes this when I Ctrl+C a pygame-based application, and the only fix is to reboot.

I am afraid its not a OpenGL problem. I had refresh problem in both windows 7 and MACOSX 10.4.11 . For a strange reason no refresh problem on Linux.

What I did to solve this issue was to detect the "unfocus" event as the window had refresh problem only when it was unfocused and a window passed in front of it. As soon I detected the "unfocus" and / or "focus" even I issued a redraw of the whole window.

By the way I used none of the OpenGL binding or techniques, just standard pygame functions in particular the update function.