Subject: Re: using glXGetProcAddressARB

[Lionel Ulmer]

> What are you referring to by "4.4 (or 4.5)"? XFree86 4.4.0 isn't out
> yet, so I'm assuming you do not mean XFree86.

Well, I did not follow at all XFree's development cycle lately. I was told
that the next major XFree tree would have this fixed. So it must be 4.4.0
:-)

> server glx vendor string: SGI
> server glx version string: 1.2

Well, so you are using GLX 1.2 and not 1.4 as Raphael told :-)
At least, Wine checks only the runtime version, NOT the built-in versions.

> So, what is the fix to this problem? It would be trivial to have
> process_attach (in $(TOPDIR)/dlls/opengl32/wgl.c) to call wine_dlsym() for
> "glXGetProcAddressARB" without checking whether it is listed as an
> extension or not and to then check whether an error occured.

Yeah, the fix is simply to remove the extension check (which was the code
before I had a fit of spec correctiveness :-) ).

> BTW, I think I have just found a potential (though unlikely) problem
> with the code in wglGetProcAddress. It checks whether
> p_glXGetProcAddressARB (the return value of wine_dlsym) != NULL.
> However, according to dlsym(3), the value of a symbol may be NULL.

Well, if a symbol value is 'NULL', I won't be able to call it anyway, no ?
So it's exactly the same for me as a symbol that is not defined :-)

      Lionel

-- 
		 Lionel Ulmer - http://www.bbrox.org/