Re: Drawing to cairo context from within emacs module?

[Eli Zaretskii <eliz@gnu.org>]

On December 5, 2019 6:42:55 AM GMT+02:00, Richard Stallman <rms@gnu.org> wrote:
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> 
>  > There's probably a million things I'm missing here, but would it be
> > possible to access the cairo context from within an emacs module, so
> > that one could simply draw stuff using the Cairo API (on
> Cairo-enabled
>  > Emacsen only, of course)? I'm sure this won't play well at all with
>   > redisplay, but it'd be fun playing around with it...
> 
> The primary purpose of GNU Emacs, or any other GNU program, is to
> contribute to what the GNU operating system can do.
> 
> The feature you are asking for would operate only on a non-GNU
> operating system.  Emacs with that feature would give a non-GNU system
> (even worse, a non-free system) better support than it gives to GNU.
> That would detach it from the GNU Project and work against our goal.
> 
> Sorry, but we must not implement this.
> 
> It would be ok to implement the feature so that it works on GNU with
> GTK2 and work on MacOS with Cairo.  That way, the feature would
> enhance the GNU system and we could continue to say validly that Emacs
> "runs best on GNU."

I think you are mistaking Cairo for something else.  Emacs supports Cairo on GNU systems.