Re: [PyOpenGL-Users] bug in glDrawBuffers?

[Mike C. F. <mcf...@vr...>]

Mike C. Fletcher wrote:
> Gijs wrote:
>   
...
> ...
>   
>> ctypes.ArgumentError: argument 2: <type 'exceptions.TypeError'>: wrong 
>> type
>>
>> I tend to cast everything that needs to be passed to OpenGL and is 
>> returned from OpenGL functions (like the genTextures and 
>> genFramebuffers function). Guess I kinda got used to it but I knew it 
>> wasn't normal.
>>     
> Okay, that would seem to be final confirmation that we have bugs in 
> handling of numpy uints on 32-bit platforms.  Luckily we now have a 
> test-case I can run to provoke it :) .
>   
Can you confirm that the machine exhibiting the problem is running 
something less than Python 2.5.2?  I can duplicate the effect on my 
32-bit Vista machine *only* if I downgrade to 2.5.1.  Thinking back on 
it, this must be the bug that we discovered which had us add the 
ALLOW_NUMPY_SCALARS flag to the OpenGL.__init__ module.  Thomas had said 
he was intending to fix it in ctypes, and it looks like he did just that 
in 2.5.2.  2.5.4 does not exhibit the problem.

Assuming that you can confirm it seems we'll either have to tell people 
to use >= 2.5.2 and/or document the use of ALLOW_NUMPY_SCALARS for those 
weird cases where for some reason someone needs to use an older 
version.  Will need to test with Python 2.4 and/or stand-alone ctypes to 
determine the versions to recommend.

Thanks,
Mike

-- 
________________________________________________
  Mike C. Fletcher
  Designer, VR Plumber, Coder
  http://www.vrplumber.com
  http://blog.vrplumber.com