[compiz] [Mesa3d-dev] The direct/indirect rendering stuff and compiz

Michel Dänzer michel at tungstengraphics.com
Fri Apr 13 10:52:32 PDT 2007

On Fri, 2007-04-13 at 13:32 -0400, David Reveman wrote:
> Does anyone know if some code similar to this would work?
> glxExtensions = glXQueryExtensionsString (dpy, screenNum);
> if (!strstr (glxExtensions, "GLX_EXT_texture_from_pixmap"))
> {
>     setenv ("LIBGL_ALWAYS_INDIRECT", "1", 1);
>     glxExtensions = glXQueryExtensionsString (dpy, screenNum);
>     if (!strstr (glxExtensions, "GLX_EXT_texture_from_pixmap"))
>         indirectRendering = TRUE
> }
> We know pretty well what the problem is and what needs to be done to fix
> it so I would be OK with including a workaround like this in head if
> people insist that they want it there.

I'm afraid it may not work because  LIBGL_ALWAYS_INDIRECT is only
checked in __glXInitialize().

I wonder why I didn't get any feedback on my proposal: Make
glXQueryExtensionsString take the current context into account when
appropriate. Would it be feasible for compiz to make the context current
before calling glXQueryExtensionsString?

Earthling Michel Dänzer           |          http://tungstengraphics.com
Libre software enthusiast         |          Debian, X and DRI developer

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