Commit Graph

1338 Commits

Author SHA1 Message Date
Matt Turner 7e20c8b7b8 Build xz tarballs instead of bzip2
Signed-off-by: Matt Turner <mattst88@gmail.com>
2021-07-08 12:32:01 -07:00
Povilas Kanapickas b4f55712da xserver 21.0.99.1
Signed-off-by: Povilas Kanapickas <povilas@radix.lt>
2021-07-05 21:40:55 +03:00
Povilas Kanapickas b9722d39cd configure.ac: Switch project version to 20.x.y style
Reviewed-by: Zoltán Böszörményi <zboszor@gmail.com>
Signed-off-by: Povilas Kanapickas <povilas@radix.lt>
2021-06-23 14:23:55 +03:00
Povilas Kanapickas 021b3c2f77 configure.ac: Bump inputproto dep to 2.3.99.1
This should have been part of 6cbcbc81525b131b5b94409ea870af663d5c28bb.

Signed-off-by: Povilas Kanapickas <povilas@radix.lt>
2021-06-16 13:01:17 +00:00
Olivier Fourdan e167299f60 xfixes: Add ClientDisconnectMode
With Wayland compositors now being able to start Xwayland on demand, the
next logical step is to be able to stop Xwayland when there is no more
need for it.

The Xserver itself is capable of terminating itself once all X11 clients
are gone, yet in a typical full session, there are a number of X11
clients running continuously (e.g. the Xsettings daemon, IBus, etc.).

Those always-running clients will prevent the Xserver from terminating,
because the actual number of X11 clients will never drop to 0. Worse,
the X11 window manager of a Wayland compositor also counts as an X11
client, hence also preventing Xwayland from stopping.

Some compositors such as mutter use the XRes extension to query the X11
clients connected, match their PID with the actual executable name and
compare those with a list of executables that can be ignored when
deciding to kill the Xserver.

But that's not just clumsy, it is also racy, because a new X11 client
might initiate a connection the X11 server right when the compositor is
about to kill it.

To solve this issue directly at the Xserver level, this add new entries
to the XFixes extension to let the X11 clients themselves specify the
disconnect mode they expect.

Typically, those X11 daemon clients would specify the disconnect mode
XFixesClientDisconnectFlagTerminate to let the Xserver know that they
should not be accounted for when checking the remaining clients prior
to terminate.

Signed-off-by: Olivier Fourdan <ofourdan@redhat.com>
Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>
2021-06-07 17:28:05 +02:00
Łukasz Spintzyk d2dce22b67 present: fix msc offset calculation in screen mode
Instead of getting the current msc value from the window crtc,
which not exist take the last saved msc value saved in
the window_priv struct

Signed-off-by: Łukasz Spintzyk <lukasz.spintzyk@synaptics.com>
2021-04-16 10:53:43 +00:00
Simon Ser 1b7dca27eb xwayland: remove wl_log_set_handler_client workaround
This bumps the minimum Wayland version to 1.5 (released in 2014).

Signed-off-by: Simon Ser <contact@emersion.fr>
Reviewed-by: Michel Dänzer <mdaenzer@redhat.com>
Reviewed-by: Olivier Fourdan <ofourdan@redhat.com>
Reviewed-by: Martin Peres <martin.peres@mupuf.org>
2021-03-24 08:13:11 +01:00
Jeremy Huddleston Sequoia f699aac2ea xquartz: Remove check for libdispatch now that we don't support pre-SnowLeopard
Signed-off-by: Jeremy Huddleston Sequoia <jeremyhu@apple.com>
2021-02-01 16:21:39 -08:00
Povilas Kanapickas 8c0afc9eb2 xfree86: Implement a test input driver
Signed-off-by: Povilas Kanapickas <povilas@radix.lt>
2020-12-14 01:12:10 +00:00
Fabrice Fontaine 9c81b8f5b5 configure.ac: KMS support also depends on dri2
Kernel modesettings support also depends on dri2, see
http://cgit.freedesktop.org/xorg/xserver/tree/hw/xfree86/drivers/modesetting/Makefile.am#n46

Fix #479

Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
[Patch retrieved (with a small update of commit message) from:
https://git.buildroot.net/buildroot/tree/package/x11r7/xserver_xorg-server/1.20.6/0001-modesettings-needs-dri2.patch]
Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
2020-11-25 06:41:28 +00:00
Olivier Fourdan 28ed4b95e9 xwayland: Add a man page
Xwayland was missing a man page, add one.

Signed-off-by: Olivier Fourdan <ofourdan@redhat.com>
Reviewed-by: Martin Peres <martin.peres@mupuf.org>
2020-11-10 14:09:42 +01:00
Olivier Fourdan 899cebb76a configure: Build hashtable for Xres and glvnd
With autoconf, hashtable support is built along with Xres support.

Yet, glvnd also use it, so when disabling Xres from configure, the
build will fail at link time because hashtable functions are not
available.

Untie the build of hashtable from Xres support, just like meson build
does.

Signed-off-by: Olivier Fourdan <ofourdan@redhat.com>
Closes: https://gitlab.freedesktop.org/xorg/xserver/-/issues/1091
2020-11-09 09:38:46 +00:00
Olivier Fourdan 5188603ff7 xwayland: Add a pkg-config file for Xwayland
Xwayland is usually spawned by the Wayland compositor which sets the
command line options.

If a command line option is not supported, Xwayland will fail to start.

That somehow makes the Xwayland command line option sort of ABI, the
Wayland compositor need to know if a particular option is supported by
Xwayland at build time.

Also, currently, Xwayland is being installed along with the rest of the
common executable programs that users may run, which is sub-optimal
because, well, Xwayland is not a common executable program, it's meant
to be a proxy between the Wayland compositor and the legacy X11 clients
which wouldn't be able to run on Wayland otherwise.

Xwayland would be better installed in `libexec` but that directory is
(purposedly) not in the user `PATH` and therefore the Wayland compositor
may not be able to find Xwayland in that case.

To solve both problems (which options are supported by Xwayland and
where to look for it), add a `pkg-config` file specifically for Xwayland
which gives the full path to Xwayland (`xwayland`) and which options it
supports (using `pkg-config` variables).

The `pkg-config` file also provides the `Version` so the build scripts
can check for a particular version if necessary.

Obviously, Wayland compositors are not required to use the `pkg-config`
file and can continue to use whatever mechanism they deem preferable.

Signed-off-by: Olivier Fourdan <ofourdan@redhat.com>
Reviewed-by: Michel Dänzer <mdaenzer@redhat.com>
2020-07-08 08:56:32 +00:00
Alan Coopersmith 23e83724df Fix spelling/wording issues
Most (but not all) of these were found by using
  codespell --builtin clear,rare,usage,informal,code,names
but not everything reported by that was fixed.

Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com>
2020-07-05 13:07:33 -07:00
Matthieu Herrb 5dc16f6fec Remove BSD APM support.
None of the current BSD is actually using this code.
(checked DragonFly 5.8.1, FreeBSD 11.2, NetBSD 9.0 and OpenBSD 6.7)

Signed-off-by: Matthieu Herrb <matthieu@herrb.eu>
2020-06-03 17:33:10 +02:00
Jon Turney 4055fed1e7 hw/xwin: Remove XSetAuthorization() for helper clients
All helper client code now uses xcb, so calling XSetAuthorization() is
no longer needed.

This is the last reference to libX11 from helper clients, so linking
with x11-xcb and libX11 is no longer required.

Also drop (unneeded?) linking with libXau.

Also drop installing these prerequistes on AppvVeyor.

Also move prototypes for functions in winauth.c from win.h into a new
header, winauth.h, and include that where needed.
2020-04-15 14:13:58 +00:00
Jon Turney 9e02e023b0 hw/xwin: xcbify clipboard integration
Convert clipboard integration code from libX11 to xcb

This drops support for COMPOUND_TEXT.  Presumably some ancient
(pre-2000) clients exist which support that, but not UTF8_STRING, but we
don't have an example to test with. (Given the nature of the thing, the
users of those clients probably work in CJK languages)

Supporting COMPOUND_TEXT would also involve writing (or extracting from
Xlib) support for the ISO 2022 encoding.

v2:
Fix the length of text property set by a SelectionRequest

The length of the text property is not neccessarily the same as the
length of the clipboard text before it is d2u converted (specifically,
if that contains any '\r\n' sequences, it will be shorter as they are
now just '\n')
2020-04-15 14:13:58 +00:00
Kenneth Graunke 25ca99df38 configure: Define GLAMOR_HAS_EGL_QUERY_DRIVER when available
Commit 195c2ef8f9 added this to the Meson
build but neglected to add it to autotools.

v2: Also update dix-config.h.in

Fixes: 195c2ef8f ("glamor: Add a function to get the driver name via EGL_MESA_query_driver")

Reviewed-by: Michel Dänzer <mdaenzer@redhat.com> [v1]
Reviewed-by: Eric Engestrom <eric@engestrom.ch> [v1]
Reviewed-by: Matt Turner <mattst88@gmail.com>
2020-01-14 12:50:53 -08:00
Matt Turner e6ab7f9f34 xfree86: Test presence of isastream()
isastream() was never more than a stub in glibc, and was removed in
glibc-2.30 by commit a0a0dc83173c ("Remove obsolete, never-implemented
XSI STREAMS declarations").

Bug: https://bugs.gentoo.org/700838
Reviewed-by: Julien Cristau <jcristau@debian.org>
Signed-off-by: Matt Turner <mattst88@gmail.com>
2019-11-22 15:22:43 -05:00
Alexander Tsoy 334f110714 configure: Set libdrm flags correctly if only XORG is enabled
This fixes modesetting driver build failure which can be triggered with
the following configure options:

$ ./configure --disable-dri --disable-dri2 --disable-dri3
--disable-config-udev --enable-xorg

Bugzilla: https://bugs.gentoo.org/689768
Signed-off-by: Alexander Tsoy <alexander@tsoy.me>
Reviewed-by: Emil Velikov <emil.velikov@collabora.com>
2019-10-29 20:45:15 +00:00
Marvin Schmidt e6ef2b1240 build: glx: Lower gl version to work with libglvnd
When using mesa with libglvnd support, mesa will no longer install the
gl, glx, egl pkg-config files but instead let libglvnd provide them.
libglvnd maintainers decided to change the versioning as it was
mesa-specific previously. Now the libraries have versions of the API
they expose[1].
This causes problems when building the X server:

  checking for glproto >= 1.4.17 gl >= 9.2.0... no
  configure: error: Package requirements (glproto >= 1.4.17 gl >= 9.2.0) were not met:

  Requested 'gl >= 9.2.0' but version of gl is 1.2

Lower the version requirement to 1.2 to allow building against libglvnd
provided libraries

[1] 0dfaea2bcb
2019-10-08 18:40:59 +00:00
Adam Jackson b2de577f63 xfree86: Merge vbe into int10
There's not really a good reason to keep these separate, the vbe code
requires int10 and is not very large. This change eliminates the
build-time options for vbe; if you build int10, you get vbe.

Gitlab: https://gitlab.freedesktop.org/xorg/xserver/issues/692
Reviewed-by: Emil Velikov <emil.velikov@collabora.com>
2019-10-02 10:03:26 -04:00
Simon Ser 01ed478c65
xwayland: add support for xdg-output-unstable-v1 version 3
This adds support for xdg-output-unstable-v1 version 3, added in [1].

This new version deprecates zxdg_output_v1.done and replaces it with
wl_output.done. If the version is high enough, there's no need to wait for both
an xdg_output.done event and a wl_output.done event -- we only care about
wl_output.done.

[1]: 962dd53537

Signed-off-by: Simon Ser <contact@emersion.fr>
Reviewed-by: Olivier Fourdan <ofourdan@redhat.com>
2019-09-05 11:36:59 +03:00
Olivier Fourdan bf758660c9 configure/xwayland: No libdrm nor epoxy without glamor
When building Xwayland without neither DRI nor GLamor support enabled
with the autotools build system, the resulting binary would still link
against libdrm and epoxy even though those are not used/needed.

Make sure we require and link against libdrm and epoxy only if needed.

Signed-off-by: Olivier Fourdan <ofourdan@redhat.com>
2019-08-15 17:08:04 +00:00
Adam Jackson 3c78d63755 global: Remove BUILD_DATE and BUILD_TIME
All this does is make reproducible builds impossible.
2019-08-15 16:38:22 +00:00
Adam Jackson e39dc0f5b7 present: Require presentproto 1.2
The PresentOptionSuboptimal support code is not optional (once you've
enabled building Present at all), so require a protocol package version
that defines what we need.

Fixes: xorg/xserver#821
2019-06-20 12:15:31 -04:00
Jon Turney ebcea16e71 hw/xwin: A simpleminded attempt at composition
Rather than drawing the window contents from the shadow framebuffer, use
Composite extension redirection to cause the server to maintain a bitmap
image of each top-level X window, and draw the window contents from
that, so that window contents which are occluded in the framebuffer show
correctly in the task bar and task switcher previews.

v2:
Fix incorrect use of memset() found by gcc5

hw/xwin/winshadgdi.c: In function ‘winBltExposedWindowRegionShadowGDI’:
hw/xwin/winshadgdi.c:861:9: warning: ‘memset’ used with constant zero length parameter; this could be due to transposed parameters [-Wmemset-transposed-args]

v3:
Turn on -compositewm by default

v4:
Ignore -swcursor if -compositewm

-swcursor is not compatible with -compositewm (because the window
contents are drawn from an off-screen pixmap, not from the screen
pixmap, where the software cursor will be drawn).

v5:
Update meson.build also
Add -compositewm option to help output
Update CI to install prerequisites
2019-06-17 21:56:35 +00:00
Jon Turney 7b4b030df8 configure: Check for sigprocmask
MinGW defines SIG_BLOCK, but doesn't have signal masks, so rather than
checking for SIG_BLOCK, add a configure check for sigprocmask.

v2:
Also add check to meson.build
2019-05-18 14:59:38 +00:00
Jon Turney 246b729df8 configure: Force --disable-input-thread for MinGW
I don't think an input thread can ever be useful on Windows.

There is a pthread emulation, so having the thread itself isn't much of
a problem.

However, there is no device to wait on for Windows events, and even if
we were to replace select() with WFMO, Windows wants to send events for
a window to the thread which created that window.

So, disable input thread by default for MinGW

v2:
Also add similar to meson.build
2019-05-18 14:59:38 +00:00
Jon Turney b4ed20c4f1 Promote file containing date & time build was configured to top-level
Promote the generated file containing the date & time build was
configured to top-level.

Rename it from xf86Build.h to buildDateTIme.h.

Use it as well in XQuartz, stringize BUILD_DATE when needed.
2019-05-02 15:42:58 +00:00
Jon Turney a2302de6fe hw/xwin: Remove mwextwm mode
This has always been described as 'experimental'

We don't think this has any users: This mode has been disabled in Cygwin
packages since March 2016. We've never provided the xwinwm WM for x86_64
Cygwin. No one has even asked where the option has gone.

This leaves XQuartz as the only user of the rootless extension.

Remove --enable-windowswm configure option
Remove multiwindowextwm stuff from Makefiles
Remove -mwextwm option
Remove -mwextwm from man-page and help
Un-ifdef XWIN_MULTIWINDOWEXTWM

v2:
Remove rootless include paths
Remove windowswmproto from meson.build
2019-05-01 14:06:15 +00:00
Alexander Volkov f6753c117e shm: Use memfd_create when possible
It doesn't require shared memory dir and thus allows
to avoid cases when this dir is detected incorrectly,
as in https://bugreports.qt.io/browse/QTBUG-71440

Signed-off-by: Alexander Volkov <a.volkov@rusbitech.ru>
2019-02-14 12:53:06 +03:00
Adam Jackson 6c1d720047 agp: Make the legacy AGP interface optional
The only thing using this anymore is the i810 driver, so this can safely
be disabled on non-i686 builds.

Signed-off-by: Adam Jackson <ajax@redhat.com>
2019-01-16 19:50:15 +00:00
Alan Coopersmith 17a22ad948 Update configure.ac bug URL for gitlab migration
Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com>
2018-11-25 12:59:41 -08:00
Eric Anholt 19f6cb570b shm: Pick the shm dir at run time, not build time.
Prodding the builder's filesystem for tmp dirs doesn't necessarily
tell you anything about what the actual host's filesystem is going to
look like, so we should just try the dirs at runtime.

Signed-off-by: Eric Anholt <eric@anholt.net>
2018-09-19 21:36:16 +00:00
Eric Anholt b8b64cd627 xorg: Don't log "Build Operating System: Linux 4.9.0-5-amd64 x86_64 Debian"
I don't think this is useful information to have in the log, and it's
a bunch of autotools and meson logic to produce it.

Signed-off-by: Eric Anholt <eric@anholt.net>
2018-09-19 13:15:04 -07:00
vadym.shovkoplias d0545847a0 autotools: Handle case when bindir var in xkbcomp.pc is absent
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=107521
Fixes: 726839459c (autotools: Derive xkb configuration from xkbcomp.pc)
Reviewed-by: Adam Jackson <ajax@redhat.com>
Signed-off-by: vadym.shovkoplias <vadym.shovkoplias@globallogic.com>
2018-08-09 12:26:26 -04:00
Eric Anholt accd32a466 xorg: Remove the XF86PM define.
We already have pm_noop.c being built most of the time for the
no-OS-PM case, so just switch to always using it.

Signed-off-by: Eric Anholt <eric@anholt.net>
Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>
2018-08-02 10:27:37 -04:00
Eric Anholt 708ddfbda1 automake,meson: Remove HAVE_LIBUDEV define.
CONFIG_UDEV and CONFIG_UDEV_KMS are the actual defines that are used
in the C code.

Signed-off-by: Eric Anholt <eric@anholt.net>
Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>
2018-08-02 10:27:36 -04:00
Adam Jackson 5a8b886a95 configure: Remove unused CONFIGFILE
This isn't used for anything, which is just as well, because
/etc/xorg.conf is not in fact a path xserver will try to use.

Bugzilla: https://bugs.freedesktop.org/8890
Signed-off-by: Adam Jackson <ajax@redhat.com>
Reviewed-by: Aaron Plattner <aplattner@nvidia.com>
2018-06-26 17:23:37 -07:00
Matt Turner 166ac294ae xfree86: Inline xf86{Read,Write}Mmio{8,16,32} on alpha
In commit 9db2af6f75 (xfree86: Remove xf86{Map,Unmap}VidMem) we
somehow stopped exporting xf86{Read,Write}Mmio{8,16,32}. Since the
function pointer indirection was intended to support dense vs sparse and
sparse support is now gone, we can just make the functions static inline
in compiler.h and avoid all of this.

Bugzilla: https://bugs.gentoo.org/548906
Tested-by: Christopher May-Townsend <chris@maytownsend.co.uk>
Reviewed-by: Adam Jackson <ajax@redhat.com>
Signed-off-by: Matt Turner <mattst88@gmail.com>
2018-06-11 14:05:04 -07:00
Adam Jackson f50afa19fd Post-1.20 version bump
Signed-off-by: Adam Jackson <ajax@redhat.com>
2018-05-14 14:09:48 -04:00
Adam Jackson 82f8fc5ffc xserver 1.20
Signed-off-by: Adam Jackson <ajax@redhat.com>
2018-05-10 12:24:11 -04:00
Adam Jackson c6ab21022c xserver 1.20 RC5
Signed-off-by: Adam Jackson <ajax@redhat.com>
2018-04-24 17:03:07 -04:00
Lyude Paul 54ac09717c xwayland: Add glamor egl_backend for EGLStreams
This adds initial support for displaying Xwayland applications through
the use of EGLStreams and nvidia's custom wayland protocol by adding
another egl_backend driver. This also adds some additional egl_backend
hooks that are required to make things work properly.

EGLStreams work a lot differently then the traditional way of handling
buffers with wayland. Unfortunately, there are also a LOT of various
pitfalls baked into it's design that need to be explained.

This has a very large and unfortunate implication: direct rendering is,
for the time being at least, impossible to do through EGLStreams. The
main reason being that the EGLStream spec mandates that we lose the
entire color buffer contents with each eglSwapBuffers(), which goes
against X's requirement of not losing data with pixmaps.  no way to use
an allocated EGLSurface as the storage for glamor rendering like we do
with GBM, we have to rely on blitting each pixmap to it's respective
EGLSurface producer each frame. In order to pull this off, we add two
different additional egl_backend hooks that GBM opts out of
implementing:

- egl_backend.allow_commits for holding off displaying any EGLStream
  backed pixmaps until the point where it's stream is completely
  initialized and ready for use
- egl_backend.post_damage for blitting the content of the EGLStream
  surface producer before Xwayland actually damages and commits the
  wl_surface to the screen.

The other big pitfall here is that using nvidia's wayland-eglstreams
helper library is also not possible for the most part. All of it's API
for creating and destroying streams rely on being able to perform a
roundtrip in order to bring each stream to completion since the wayland
compositor must perform it's job of connecting a consumer to each
EGLstream. Because Xwayland has to potentially handle both responding to
the wayland compositor and it's own X clients, the situation of the
wayland compositor being one of our X clients must be considered. If we
perform a roundtrip with the Wayland compositor, it's possible that the
wayland compositor might currently be connected to us as an X client and
thus hang while both Xwayland and the wayland compositor await responses
from eachother. To avoid this, we work directly with the wayland
protocol and use wl_display_sync() events along with release() events to
set up and destroy EGLStreams asynchronously alongside handling X
clients.

Additionally, since setting up EGLStreams is not an atomic operation we
have to take into consideration the fact that an EGLStream can
potentially be created in response to a window resize, then immediately
deleted due to another pending window resize in the same X client's
pending reqests before Xwayland hits the part of it's event loop where
we read from the wayland compositor. To make this even more painful, we
also have to take into consideration that since EGLStreams are not
atomic that it's possible we could delete wayland resources for an
EGLStream before the compositor even finishes using them and thus run
into errors. So, we use quite a bit of tracking logic to keep EGLStream
objects alive until we know the compositor isn't using them (even if
this means the stream outlives the pixmap it backed).

While the default backend for glamor remains GBM, this patch exists for
users who have had to deal with the reprecussion of their GPU
manufacturers ignoring the advice of upstream and the standardization of
GBM across most major GPU manufacturers. It is not intended to be a
final solution to the GBM debate, but merely a baindaid so our users
don't have to suffer from the consequences of companies avoiding working
upstream. New drivers are strongly encouraged not to use this as a
backend, and use GBM like everyone else. We even spit this out as an
error from Xwayland when using the eglstream backend.

Signed-off-by: Lyude Paul <lyude@redhat.com>
Acked-by: Daniel Stone <daniels@collabora.com>
Reviewed-by: Adam Jackson <ajax@redhat.com>
2018-04-24 16:51:18 -04:00
Lyude Paul 994f781007 xwayland: Add xwayland-config.h
Just a small autogenerated header that will soon contain more then just
one macro.

Signed-off-by: Lyude Paul <lyude@redhat.com>
Reviewed-by: Daniel Stone <daniels@collabora.com>
Reviewed-by: Adam Jackson <ajax@redhat.com>
2018-04-24 14:58:19 -04:00
Emil Velikov d7269b49c3 configure.ac: make use of wayland-scanner.pc
Replace the current (incorrect) assumption that wayland-scanner is
located in the wayland-client prefix. Make use of the wayland_scanner
variable in wayland-scanner.pc

It was introduced back in 2013 and we already require newer wayland bits

Reviewed-by: Adam Jackson <ajax@redhat.com>
Signed-off-by: Emil Velikov <emil.velikov@collabora.com>
2018-04-12 17:17:43 -04:00
Adam Jackson d61e516c84 xserver 1.20 RC4
Signed-off-by: Adam Jackson <ajax@redhat.com>
2018-04-10 15:45:02 -04:00
Adam Jackson 74aef564a7 xwayland: Silence a build warning if we can
[735/786] Generating 'hw/xwayland/Xwayland@exe/relative-pointer-unstable-v1-protocol.c'.
Using "code" is deprecated - use private-code or public-code.
See the help page for details.

Use private-code if wayland-scanner is new enough.

Signed-off-by: Adam Jackson <ajax@redhat.com>
2018-04-05 15:50:02 -04:00
Adam Jackson df6cbf7a2b xserver 1.20 RC3
Signed-off-by: Adam Jackson <ajax@redhat.com>
2018-04-02 15:44:50 -04:00