This OpenGL method is currently a stub, looking at the MSDN documentation I can't see why this is the case given the fairly complete GL implementation Wine has. Is it that we cannot handle layering properly in X or something?
Well, the case 'iLayerPlane == 0' would be easy as it's the main plane.. But do tell me how you plan to do OpenGL underlay and overlay planes using GLX ?
Maybe there is a GLX extension to that effect, but I am not aware of it.
Moreover, do you actually have an application using this ?
Lionel