X11, libglx.so, and GL screen capture programs

Adam Jackson ajax at nwnk.net
Thu Jun 1 07:14:59 PDT 2006

On Thursday 01 June 2006 07:58, Christian Parpart wrote:
> Hi all,
> I wanted to write an X11 screen catpure program, while XSHM served well for
> capturing plain X11 screens, it doesn't so well for GLX apps inside X11.
> So, I asked around, and got the hint to hook into glXSwapBuffers() - which
> is located in libglx.so - which means, I've to write my own libglx.so to
> forward all called into the real libglx.so I dlopen myself.
> That sounds cool, however, I now can't find a real GLX app being linked
> against libglx.so to test my lib on it. Neither cedega, nor glxgears or
> even glxinfo is linked against it.

That's because libglx.so is loaded by the server at runtime.  libGL.so is the 
client-side library.

- ajax
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