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7c085aebfe
Oliver McFadden reports that the invisible cursor sprite caused damage events and thus unnecessary redrawing, so removing it improves performance when using software cursor sprites, especially on those devices where you do not want a visible cursor: touchscreen tablets, embedded devices, etc. For the xfree86 DDX, if hardware cursors are used, the driver is required to provide a HideCursor function, which will be called instead of trying to set a null cursor. I think software cursors are already safe. The other DDXes also look safe. As far as I can tell, there's no reason to realize a null cursor. I think everything that handles null cursors doesn't rely on any setup in RealizeCursor, and treats them as empty cursors. Xnest assumes that if a cursor is created, it will be realized before it is freed, which didn't happen if the invisible cursor was never used in a server generation. So this fixes a segfault in Xnest as well. Signed-off-by: Jamey Sharp <jamey@minilop.net> Cc: Oliver McFadden <oliver.mcfadden@nokia.com> Signed-off-by: Oliver McFadden <oliver.mcfadden@nokia.com> Tested-by: Oliver McFadden <oliver.mcfadden@nokia.com> Signed-off-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