2d7eb4a19b
In order to execute a wire-level ChangeGC request, we need to look up the resources named by any XIDs in the value-list. Various places in the server already have pointers to the resources they want to set into the GC, though, so over time the interface has evolved to accept either XIDs or pointers, with several different function call signatures used in different eras. This patch makes the existing code require pointers to resources rather than XIDs, and adds a simple wrapper that looks up any XIDs. The old dixChangeGC API is preserved by delegating to whichever implementation is appropriate. This affects error-handling: If any of the XIDs are invalid, then the GC is unchanged, and its ChangeGC callback is not invoked. This change is allowed by the protocol spec, which says, "The order in which components are verified and altered is server-dependent. If an error is generated, a subset of the components may have been altered." Signed-off-by: Jamey Sharp <jamey@minilop.net> Reviewed-by: Keith Packard <keithp@keithp.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