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5d6ad0d3a7
The previous change removed the special case that matched resources of CompositeClientWindowType and walked back from that to the window pixmap. That was intentional, since that logic was broken anyway. CCWTs don't map 1:1 to references on the backing pixmap; a window redirected by multiple clients (say, by the server since it's on the synthetic visual, and then manually by a compositor) would have a window pixmap refcount of 1, but would have those bytes accounted twice. The right thing is to have Composite wrap window accounting, and add the pixmap bytes once and only once for the redirection reference. Note that the view from the client can still be non-intuitive in the face of Composite. xcompmgr, for example, holds _two_ references to each window pixmap (one each from CompositeNameWindowPixmap and RenderCreatePicture), so a synthetic-visual window will have its bytes split 2/3 to xcompmgr and 1/3 to the server-client. Nothing to be done about that, and at least this way we're not over-accounting. Acked-by: Michel Dänzer <michel.daenzer@amd.com> Signed-off-by: Adam Jackson <ajax@redhat.com>
X Server
The X server accepts requests from client applications to create windows,
which are (normally rectangular) "virtual screens" that the client program
can draw into.
Windows are then composed on the actual screen by the X server
(or by a separate composite manager) as directed by the window manager,
which usually communicates with the user via graphical controls such as buttons
and draggable titlebars and borders.
For a comprehensive overview of X Server and X Window System, consult the
following article:
http://en.wikipedia.org/wiki/X_server
All questions regarding this software should be directed at the
Xorg mailing list:
http://lists.freedesktop.org/mailman/listinfo/xorg
Please submit bug reports to the Xorg bugzilla:
https://bugs.freedesktop.org/enter_bug.cgi?product=xorg
The master development code repository can be found at:
git://anongit.freedesktop.org/git/xorg/xserver
http://cgit.freedesktop.org/xorg/xserver
For patch submission instructions, see:
http://www.x.org/wiki/Development/Documentation/SubmittingPatches
For more information on the git code manager, see:
http://wiki.x.org/wiki/GitPage