Re: [osg-users] Access Violation in wglChoosePixelFormat when running with Purify

2010-04-30 Thread Florian Kolbe 
Hi,

  just to let you know...

  I hacked the code reverting to ::ChoosePixelFormat explicetly.
(The code already has a fallback mechanism).
Apparently, this was the only blocker to get the app running with Purify.

Now I can't seem to get anti-aliasing.  traits.samples does not go into the 
call to ::ChoosePixelFormat. Should not these Methods be equivalent?

I guess ::ChoosePixelFormat does not allow to choose multi-sampling.
The following link seems to confirm this:
http://nehe.gamedev.net/data/lessons/lesson.asp?lesson=46

Regards,
Florian

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[osg-users] Access Violation in wglChoosePixelFormat when running with Purify

2010-04-21 Thread Florian Kolbe 
Hi,

I am running OpenSceneGraph-2.8.3 on Windows XP and my app runs fine.
Running it with Purify though, I get an Access Violation in 
wglChoosePixelFormat.
I'm pretty sure it's the call from the osgViewer (GraphicsWindowWin32.cpp).

[E] EXU: Unhandled exception in wglChoosePixelFormat {1 occurrence}
Exception code: 0xc005 [Error: access violation reading from 
0x0564]
Exception address: [C:\WINDOWS\SYSTEM32\OPENGL32.DLL ip=0x5F0FAED7]
Filter: [C:\Programme\IBM\RationalPurifyPlus\Common\PURERT.DLL 
ip=0x3F018190]
Exception location
 [c:\WINDOWS\SYSTEM32\OPENGL32.DLL ip=0x5F0FAED9] 

I assume that Purify has trouble with the function call where the function 
pointer was retrieved via wglGetProcAddress? Does anyone have experience with 
this?

Thank you!

Cheers,
Florian

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