Patch for

Bertrand Coconnier bcoconni at
Wed Nov 1 14:17:51 CST 2006

Roderick Colenbrander wrote :
>> On 11/1/06, Bertrand Coconnier <bcoconni at> wrote:
>>> Hi,
>>> The last release of Wine 0.9.24 contains an error in the code of
>>> under X11 : Wine tries to get the address of "wglGetIntegerv" (line 608
>> of
>>> dlls/opengl32/wgl.c) before the extensions of WGL have actually been
>> loaded
>>> (i.e. before X11DRV_WineGL_LoadExtensions() is called). The reading of
>> the
>>> wglGetIntegerv address fails and afterwards, whenever
>> internal_glGetIntegerv()
>>> is called, wine_wgl.p_wglGetIntegerv is NULL and a Fatal Exception is
>> raised.
>> This is probably already fixed in the git tree.  See the commit:
>> winex11.drv: Fixed the prototype of many OpenGL functions.
>> Jesse
> Else if the problem still happens something strange is going as the extensions are registered at x11drv startup.
> Roderick

Yes, the problem still happens because the function process_attach() (line 582 
of dlls/opengl32/wgl.c) is called before the x11drv startup. The comment of 
process_attach is very clear : "/* This is for brain-dead applications that use 
OpenGL functions before even creating a rendering context.... */". It is clear 
that process_attach is a workaround for *brain-dead* apps :) and among other 
things it gets the address of wglGetIntegerv. This operation used to succeed as 
long as GetProcAddress() was used but now since x11drv is needed to upload the 
wglGetIntegerv address there is some kind of race condition and the operation 
fails hence the bug.


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