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3ac481c9da
miZeroLine allocates enough space to draw a line spanning the entire
width/height of the target drawable. When drawing multiple shorter
lines, this leaves most of the space in that buffer unfilled. Let
multiple lines be drawn into the buffer if there is plenty of space.
Speeds up glamor fallback zero-width lines:
Before
6000000 trep @ 0.0020 msec (508000.0/sec): 1-pixel line
6000000 trep @ 0.0020 msec (492000.0/sec): 10-pixel line
6000000 trep @ 0.0023 msec (427000.0/sec): 100-pixel line
4000000 trep @ 0.0035 msec (282000.0/sec): 500-pixel line
After:
600000000 trep @ 0.0000 msec (43400000.0/sec): 1-pixel line
140000000 trep @ 0.0001 msec (13000000.0/sec): 10-pixel line
16000000 trep @ 0.0008 msec (1300000.0/sec): 100-pixel line
4000000 trep @ 0.0038 msec (261000.0/sec): 500-pixel line
(500 pixel lines do not change in performance because the buffer can
only one one of them.)
Signed-off-by: Keith Packard <keithp@keithp.com>
Reviewed-by: Eric Anholt <eric@anholt.net>
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