[PATCH 0/4] Move GC clip management to ScreenRec

[Adam Jackson]

None of the GC wrappers do anything particularly interesting with clip
management.  I think in theory this was meant to allow the driver to
flatten the clip to a bitmap and/or keep track of a window ID, but the
only example I can find of anything remotely like that in open code is
Xprint's PostScript backend, which, well.

I've not tested this in any real sense.  It would want at least an xts5
run against Xnest and Xvfb before committing.  The CopyClip change might
want to be a screen func as well for symmetry.

Longer term I don't think there's any reason to have GCFuncs at all, and
that the whole thing could be embedded in the ScreenRec.

Dead code diff:

   text	   data	    bss	    dec	    hex	filename
1844275	  52216	  64384	1960875	 1debab	Xorg-clip-gc
1842034	  52120	  64384	1958538	 1de28a	Xorg-clip-screen

- ajax