[opengl] check drawable and context Visual IDs in wglMakeCurrent ()

Raphael fenix at club-internet.fr
Thu Mar 23 18:23:51 CST 2006

On Friday 24 March 2006 00:13, Tomas Carnecky wrote:
> Stefan Dösinger wrote:
> > Hi,
> >
> >> So.. in this attachment you'll find a patch that does what I've just
> >> described. I can't test it on anything else than WoW, so if someone
> >> would please review it and test with outher opengl/d3d applications it
> >> would be great.
> >
> > No effects noticed with Half-life 1(GL), Warcraft III(GL and D3D) and
> > Jedi Academy(GL).
> maybe it was because of the earlier opengl patch 'Store GL context in
> TEB'. But I didn't notice such an increase then.. only from ~20 -> ~30fps
> > That patch gave me a hint for a possible reason for the WineD3D slowness
> > with a few games :)
> good, at least something :)
> Something else.. now I know why there is this VisualID mismatch. Someone
> didn't read the GLX spec. 

It's me. i have read the spec. And it's work (but not really well 
documented) :)

> in opengl32/wgl.c:describeDrawable() you call 
> glXQueryDrawable() with GLX_VISUAL_ID, but that's not allowed ! only
> GLX_FBCONFIG_ID and three others, according to the GLX 1.3/1.4 spec [1].
> According to the spec, you can get the GLXFBConfig from a GLXDrawable
> using glXQueryDrawable() and then the Visual from the GLXFBConfig using
> glXGetFBConfigAttrib(). 

Yes i now that, problem is that glXQueryDrawable is not always available (only 
nvidia drivers implement it). So expect to break major part of wine users 

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