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Olivier Fourdan e59a32c897 glamor: an FBO is not needed for Xv pixmaps 
It appears that on some hardware/diver combo such as nv30/nouveau, using
GL_ALPHA as format for 8-bit depth will cause an incomplete attachment
error (GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT) when trying to bind the
texture.

As a result, the FBO is NULL and glamor segfaults when trying to access
the FBO width/height in pixmap_priv_get_scale() in glamor_xv_render().

This happens with glamor-xv which uses 8-bit pixmaps, meaning that on
such hardware/driver, trying to play a video using Xv will lead to a
crash of the Xserver. This affects Xwayland, Xephyr, modesetting driver
with glamor accel.

But the use of an FBO is not actually needed for glamox-xv, so by
disabling FBO at pixmap creation, we can avoid the issue entirely.

Fix suggested by Eric Anholt <eric@anholt.net>

Signed-off-by: Olivier Fourdan <ofourdan@redhat.com>
Fixes: https://bugs.freedesktop.org/show_bug.cgi?id=100710
Fixes: https://bugzilla.redhat.com/1412814
Reviewed-by: Eric Anholt <eric@anholt.net>
(cherry picked from commit 7bfb87a213)
2017-09-25 15:34:10 -04:00
composite composite: Fix repaint of borders (v2) 2017-01-11 15:00:47 -05:00
config ddx: add new call to purge input devices that weren't added 2016-10-26 15:35:07 +10:00
damageext dix: Remove pointless client-state callbacks 2016-05-11 11:21:08 -04:00
dbe Convert top level extensions to new *allocarray functions 2015-04-21 16:57:08 -07:00
dix Revert "prime: Sync shared pixmap from root window instead of screen pixmap" 2017-03-10 10:56:15 -05:00
doc Remove readmask from screen block/wakeup handler 2016-07-18 15:27:51 -04:00
dri3 dri3: Don't do return client->noClientException 2016-09-02 13:41:24 -04:00
exa Remove readmask from screen block/wakeup handler 2016-07-18 15:27:51 -04:00
fb fb: XYPixmap format PutImage includes all planes in depth 2016-10-04 12:15:55 -04:00
glamor glamor: an FBO is not needed for Xv pixmaps 2017-09-25 15:34:10 -04:00
glx glx/dri2: Don't build DRI loader if DRI2 isn't enabled 2016-10-27 14:25:42 +01:00
hw xfree86/modes: Make colormap/gamma glue code work with RandR disabled 2017-09-25 15:34:10 -04:00
include Use arc4random_buf(3) if available to generate cookies. 2017-02-28 14:18:26 -05:00
m4 Add ax_pthread.m4 to m4/ 2016-05-29 19:20:51 -07:00
man Xserver.man: document more transports for -nolisten & -listen options 2015-10-28 14:16:28 -04:00
mi XQuartz: Adopt input_lock() and input_unlock() 2016-09-22 14:55:02 -07:00
miext damage: Validate source pictures bound to windows before unwrapping 2017-02-23 14:55:00 -05:00
os os: Fix iteration over busfaults 2017-03-15 13:27:11 -04:00
present present: disable page flip only when a slave crtc is active 2017-03-10 11:05:36 -05:00
pseudoramiX Convert top level extensions to new *allocarray functions 2015-04-21 16:57:08 -07:00
randr randr: fix xserver crash when xrandr setprovideroutputsource 2017-01-11 15:04:12 -05:00
record record: Fix OOB access in ProcRecordUnregisterClients 2017-09-22 18:45:59 +02:00
render render: Fix out of boundary heap access 2017-03-15 13:27:11 -04:00
test test: fix distributing scripts 2017-01-11 15:00:53 -05:00
Xext xinerama: Implement graphics exposures for window->pixmap copies (v4) 2017-09-22 18:45:58 +02:00
xfixes dix: Remove pointless client-state callbacks 2016-05-11 11:21:08 -04:00
Xi Xi: when creating a new master device, update barries for all clients 2017-01-11 14:58:51 -05:00
xkb xkb: fix turbo-repeat of RedirectKey-ed keysyms 2016-09-21 17:33:43 +10:00
.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
autogen.sh autogen: Set a default subject prefix for patches 2016-02-08 17:41:38 -05:00
configure.ac xserver 1.19.3 2017-03-15 13:44:05 -04:00
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
fix-miregion Change region implementation names to eliminate the 'mi' prefix 2010-06-05 17:47:32 -07:00
fix-miregion-private Change region implementation names to eliminate the 'mi' prefix 2010-06-05 17:47:32 -07:00
fix-patch-whitespace Rename region macros to eliminate screen argument 2010-06-05 18:59:00 -07:00
fix-region Rename region macros to eliminate screen argument 2010-06-05 18:59:00 -07:00
Makefile.am DIST_SUBDIRS needs to include glamor, even if it isn't built 2014-02-13 15:25:56 -08:00
manpages.am Xorg: Add a suid root wrapper 2014-03-12 08:50:05 +01:00
README packaging: provide a default README file #24206 2010-01-27 14:00:17 -08:00
xorg-server.m4 macros: clarify documentation 2012-11-05 13:24:57 -06:00
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 

					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