OpenGL as child windows

Roderick Colenbrander thunderbird2k at
Sun Dec 31 05:24:45 CST 2006

> On Sunday 31 December 2006 00:12, you wrote:
> > AFAIK there is no technical problems, only political ones. Wine no
> > longer allows subwindows to be X11 windows. I've heard Alexandre
> > Julliard won't accept such patches.
> These wouldn't be Win32 subwindows as X11 child windows (as I heard Wine 
> doesn't do), but rather, a child window of the main window used solely for
> showing OpenGL on. I can't, in my admittedly limited knowledge, think of
> why 
> it wouldn't work, and it should also help clear the problem Wine has with 
> Win32 child windows using OpenGL since they'd implicitly clip to the child
> window extents, instead of trying to hack the scissors test. The X11 child
> window for OpenGL would be completely transparent to the app (as in,
> opengl 
> wouldn't announce its existance, and the rest of the code wouldn't care
> about 
> it).

The subwindow would be created from within the opengl code (e.g. wglCreateContext / SetPixelFormat). That is where it happens on Windows too and on Windows OpenGL also uses some sort of overlay.

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