[compiz] The direct/indirect rendering stuff and compiz

[Hanno Böck]

Hi,

In fact, this bugged me a long time and now I'd finally like to have a 
solution:
https://bugs.freedesktop.org/show_bug.cgi?id=8160

The issue is:
compiz has now some fallback code to indirect rendering if direct doesn't 
work. But that's completely useless, because it'll fail some lines later, 
exactly here:
        glxExtensions = glXQueryExtensionsString (dpy, screenNum);
        if (!strstr (glxExtensions, "GLX_EXT_texture_from_pixmap"))

The issue is, glXQueryExtensionsString won't return texture_from_pixmap on 
AIGLX if LIBGL_ALWAYS_INDIRECT isn't set.

Now, the hacky solution would be to do something like the patch I attached to 
the bug 8160.

The proper solution would probably to add an optional parameter to 
glXQueryExtensionsString to force indirect rendering. Shouldn't be that hard, 
some fiddling around with stdarg/va_list. As this probably results in a small 
API-change, I wanted to have the opinion of the mesa-folks how to solve this 
best.

-- 
Hanno Böck		Blog:   http://www.hboeck.de/
GPG: 3DBD3B20		Jabber: jabber at hboeck.de
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