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Peter Harris ab0b853e75 fb: Fix fbComposite source and mask clipping 
The render specification says that the user's clip is applied to both
input and output. Other backends (eg. glamor and exa) clip the source
and mask via miComputeCompositeRegion. Instead, fb relies on pixman to
do all of the clipping, but pixman cannot clip the source unless we tell
it the clip that should be applied to the source.

fbComposite originally set the clip parameter of image_from_pict to TRUE
before commit a72c65e917 "fb: Adjust
transform or composite coordinates for pixman operations". That commit
talks about origin adjustments, but makes no mention of clipping, which
leads me to believe that the change from TRUE to FALSE was
unintentional. Unfortunately, we can't revert this small change because
the code now uses pCompositeClip, which is incorrect when there is a
transform applied.

I noticed this due to a massive performance regression when running
x11perf under marco (the window manager of the MATE desktop
environment). marco sets a clip on the source picture before calling
RenderComposite to update the screen, rather than the destination
picture.

Signed-off-by: Peter Harris <pharris@opentext.com>
2019-09-03 15:47:22 -04:00
.gitlab-ci gitlab-ci: Add ccache to docker image, and leave in autotools 2019-02-19 18:16:16 +01:00
composite Switch automatic composite update to WorkQueue 2018-10-03 10:28:52 +02:00
config config/udev: Include header <sys/sysmacros.h> to use major/minor 2018-11-14 10:26:48 -05:00
damageext Use ARRAY_SIZE all over the tree 2017-10-30 13:45:20 -04:00
dbe meson: Distribute more SDK headers 2018-04-02 13:42:08 -04:00
dix dix: cache ResourceClientBits() value 2018-12-11 18:41:33 +00:00
doc dix: Remove LegalModifier() 2018-09-28 16:25:17 -04:00
dri3 dri3: Fix XACE access mode for open and get_supported_modifiers 2019-01-16 20:05:43 +00:00
exa exa: Use PictureMatchFormat for source-only picture format description 2018-06-01 11:57:15 +02:00
fb fb: Fix fbComposite source and mask clipping 2019-09-03 15:47:22 -04:00
glamor glamor/glamor_egl.c: EGL_NATIVE_PIXMAP_KHR do not require contexts 2019-01-10 21:35:19 +00:00
glx vnd: Fix a silly memory leak 2019-01-16 15:18:02 -05:00
hw xfree86/modes: Add "NoOutputInitialSize" option 2019-03-06 11:33:29 -05:00
include Add ddxInputThread call from os layer into ddx layer 2019-02-25 15:48:03 +00:00
m4 Add ax_pthread.m4 to m4/ 2016-05-29 19:20:51 -07:00
man dix: Remove the magic WhenMapped backing store hack 2018-10-23 18:37:46 +00:00
mi mi: When {en,dis}abling extensions, match names case-insensitively 2019-01-16 20:11:24 +00:00
miext miext/damage: take care of the coordinate mode in damagePolyPoint 2018-09-25 21:27:08 -07:00
os Add ddxInputThread call from os layer into ddx layer 2019-02-25 15:48:03 +00:00
present present/wnmd: Allow flipping if the window pixmap matches the toplevel's 2019-01-30 19:13:54 +00:00
pseudoramiX Unvalidated lengths 2017-10-10 23:33:34 +02:00
randr randr: rrCheckPixmapBounding should only increase screen size 2018-08-24 09:55:48 +02:00
record Add a Meson build system alongside autotools. 2017-04-26 15:25:27 -07:00
render animcur: Fix crash when removing a master device 2018-04-24 14:28:27 -04:00
test Revert "ci: Work around broken python UTF8 handling in the CI docker image" 2018-12-17 17:52:39 +01:00
Xext shm: Use memfd_create when possible 2019-02-14 12:53:06 +03:00
xfixes xfixes: Restore monitoring of animated cursors 2018-02-14 13:52:45 -05:00
Xi Xi: lock the input thread for any pointer barrier list manipulation 2019-02-14 09:10:58 +10:00
xkb xkb: Write the _XKB_RULES_NAMES window property synchronously 2018-11-13 10:36:18 -05:00
.appveyor.yml appveyor: use meson 2018-03-21 10:16:44 -04:00
.dir-locals.el Add .dir-locals.el 2013-08-17 12:17:36 +02:00
.gitignore .gitignore: Add new autotools file 'test-driver' 2014-04-21 13:41:42 -07:00
.gitlab-ci.yml Revert "gitlab-ci: Only run docker-image stage if relevant source files change" 2019-02-27 15:59:01 +00:00
.travis.yml Drop Travis Linux build in favour of GitLab CI 2018-12-17 15:40:52 +01:00
autogen.sh autogen: Set a default subject prefix for patches 2016-02-08 17:41:38 -05:00
configure.ac shm: Use memfd_create when possible 2019-02-14 12:53:06 +03:00
COPYING modesetting: Merge modesetting's COPYING into the xserver's. 2014-09-15 12:46:02 -07:00
devbook.am doc: Create a script to filter xmlto output 2015-01-05 14:24:06 -08:00
docbook.am docbook.am: embed css styles inside the HTML HEAD element 2011-09-21 14:07:49 -07:00
Makefile.am Update README for gitlab migration 2018-11-25 20:55:11 +00:00
manpages.am man: Fix automake seddery 2018-05-08 12:15:30 -04:00
meson.build meson: Bump required meson version to 0.46 2019-03-05 11:34:21 -05:00
meson_options.txt agp: Make the legacy AGP interface optional 2019-01-16 19:50:15 +00:00
README.md Update README for gitlab migration 2018-11-25 20:55:11 +00:00
xorg-server.m4 xorg-server.m4: just all cflags instead of just sdkdir 2018-09-20 20:12:24 +01:00
xorg-server.pc.in xfree86: link modules against Xorg symbols on Cygwin 2012-04-05 21:57:07 -05:00
xserver.ent.in doc: relocate xserver.ent in the package root directory 2011-05-14 11:22:26 -07:00

README.md

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: https://en.wikipedia.org/wiki/X_server

All questions regarding this software should be directed at the Xorg mailing list:

https://lists.freedesktop.org/mailman/listinfo/xorg

The master development code repository can be found at:

https://gitlab.freedesktop.org/xorg/xserver

For patch submission instructions, see:

https://www.x.org/wiki/Development/Documentation/SubmittingPatches

As with other projects hosted on freedesktop.org, X.Org follows its Code of Conduct, based on the Contributor Covenant. Please conduct yourself in a respectful and civilized manner when using the above mailing lists, bug trackers, etc:

https://www.freedesktop.org/wiki/CodeOfConduct