This is a rough intro to what Xwayland is and does, with just one
implementation detail so far (Window identification).
I paid no attention to formatting details, those can be polished in
follow-ups. I just want the prose out.
I also just quickly whacked up the diagram, would be happy to see
someone replace it with a nicer one. I just didn't have time to learn
dot for now.
v2:
- typo fix
- rephrase "talking to hardware" as "driving the displays"
- mention circular dependency in intro
- add section to explain rootless and rootful modes
- remove paragraph about Xwayland protocol usage
- move TBD part to the end under a new section header
v3:
- use "advantage" and "disadvantage" instead of "pro" and "con"
- slight rewording on rootful mode and rootless mode paragraphs
- removed the paragraph about the lack of shell and special Wayland
protocol extensions
- removed the commented out list of ideas to write
v4:
- typo fixes pointed out by Yong
Cc: Olivier Fourdan <ofourdan@redhat.com>
Cc: Jonas Ådahl <jadahl@gmail.com>
Cc: Daniel Stone <daniel@fooishbar.org>
Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
Reviewed-by: Jonas Ådahl <jadahl@gmail.com>
In order to support system compositor instances, it is necessary to
allow clients' wl_display_connect() to find the compositor's listening
socket somewhere outside of XDG_RUNTIME_DIR. For a full account, see
the discussion beginning here:
https://lists.freedesktop.org/archives/wayland-devel/2017-November/035664.html
This change adjusts the client-side connection logic so that, if
WAYLAND_DISPLAY is formatted as an absolute pathname, the socket
connection attempt is made to just $WAYLAND_DISPLAY rather than
usual user-private location $XDG_RUNTIME_DIR/$WAYLAND_DISPLAY.
This change is based on Davide Bettio's submission of the same concept
at:
https://lists.freedesktop.org/archives/wayland-devel/2015-August/023838.html.
v4 changes:
* Improved internal comments and some boundary-condition
error checks in test case.
* Refer to compositor as "Wayland server" rather than "Wayland
display" in wl_display_connect() doxygen comments.
* Remove redundant descriptions of parameter-interpretation
mechanics from wl_display_connect() manpage. Reworked things
to make it clear that 'name' and $WAYLAND_DISLAY are each
capable of encoding absolute server socket paths.
* Remove callout to reference implementation behavior in protocol
documented. In its place there is now a simple statement that
implementations can optionally support absolute socket paths.
v3 changes:
* Added test case.
* Clarified documentation to note that 'name' parameter to wl_display_connect()
can also be an absolute path.
v2 changes:
* Added backward incompatibility note to wl_display_connect() manpage.
* Rephased wl_display_connect() manpage changes to precisely match actual
changed behavior.
* Added mention of new absolute path behavior in wl_display_connect()
doxygen comments.
* Mentioned new absolute path interpretation of WAYLAND_DISPLAY in
protocol documentation.
Signed-off-by: Matt Hoosier <matt.hoosier@gmail.com>
Acked-by: Jonas Ådahl <jadahl@gmail.com>
Reviewed-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
The docbook title was "The Wayland display server," which is inaccurate.
Change the title to "The Wayland Protocol".
Signed-off-by: Yong Bakos <ybakos@humanoriented.com>
Reviewed-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
The Wayland docbook and the doxygen html docs had been presenting
wl_display_get_additional_shm_formats as part of the public API, but the
prototype for this function is in wayland-private.h.
Add a \private annotation to the doc comment, preventing doxygen from
publishing this function as public.
Add logic to the publican xsl to only transform elements with a "prot"
attribute value of "public".
Signed-off-by: Yong Bakos <ybakos@humanoriented.com>
Reviewed-by: Bryce Harrington <bryce@osg.samsung.com>
The enum attribute, for which scanner support was introduced in
1771299, can be used to link message arguments to <enum>s. However,
some arguments refer to <enum>s in a different <interface>.
This adds scanner support for referring to an <enum> in a different
<interface> using dot notation. It also sets the attributes in this
style in the wayland XML protocol (wl_shm_pool::create_buffer::format
to wl_shm::format, and wl_surface::set_buffer_transform::transform to
wl_output::transform), and updates the documentation XSL so that this
new style is supported.
Changes since v2:
- add object:: prefix for all enumerations in the documentation
- fix whitespace in scanner.c
- minor code fixup to return early and avoid casts in scanner.c
Changes since v1:
- several implementation bugs fixed
Signed-off-by: Auke Booij <auke@tulcod.com>
Reviewed-by: Nils Christopher Brause <nilschrbrause@googlemail.com>
Reviewed-by: Bill Spitzak <spitzak@gmail.com>
[Pekka: rebased across cde251a124]
[Pekka: wrap lines and space fixes in scanner.c]
Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
Introduce the enum and bitfield attributes, which allow you to refer to the enum
you are expecting in an argument, and specify which enums are to be thought of
as bitfields.
Changes since v3:
- Fix typo ("description" -> "descriptive")
Signed-off-by: Auke Booij <auke@tulcod.com>
Reviewed-by: Nils Chr. Brause <nilschrbrause@googlemail.com>
Reviewed-by: Bryce Harrington <bryce@osg.samsung.com>
This reverts commit fb7e130217.
Developers have been trying to reduce the number of by default required
environment variables, and the mentioned commit is a step backwards in
that sense. The fundamental assumption is that a user has only one main
(Wayland) display server where all programs should connect to by
default, and do so with an a priori known socket name.
The commit also broke various use cases in the wild, some accidentally
due to other causes, some intentionally. This revert allows those use
cases to continue.
The original problem of running Weston in a window in an existing GNOME
X11 session and getting applications unintentionally launched into
Weston can be circumvented by letting Weston use a non-default socket
name, leaving wayland-0 unused.
Discussion:
http://lists.freedesktop.org/archives/wayland-devel/2015-August/023927.htmlhttp://lists.freedesktop.org/archives/wayland-devel/2015-August/023937.html
Cc: Dima Ryazanov <dima@gmail.com>
Cc: Giulio Camuffo <giuliocamuffo@gmail.com>
Cc: Daniel Stone <daniel@fooishbar.org>
Cc: Jasper St. Pierre <jstpierre@mecheye.net>
Cc: Ryo Munakata <ryomnktml@gmail.com>
Cc: Ray Strode <halfline@gmail.com>
Cc: Peter Hutterer <peter.hutterer@who-t.net>
Cc: Matthias Clasen <mclasen@redhat.com>
Cc: Sjoerd Simons <sjoerd.simons@collabora.co.uk>
Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
Acked-by: Ray Strode <rstrode@redhat.com>
Acked-by: Dima Ryazanov <dima@gmail.com>
Reviewed-by: Bryce Harrington <bryce@osg.samsung.com>
Acked-By: Sjoerd Simons <sjoerd.simons@collabora.co.uk>
Acked-By: Ryo Munakata <ryomnktml@gmail.com>
Acked-by: Peter Hutterer <peter.hutterer@who-t.net>
Although defaulting to wayland-0 seems convenient, it has an undesirable
side effect: clients may unintentionally connect to the wrong compositor.
Generally, it's safer to fail instead. Here's a real example:
In Fedora 22, Gtk+ prefers Wayland over X11, though the default session is still
a normal X11 Gnome session. When you launch a Gtk+ app, it will try Wayland,
fail, then try X11, and succesfully start up. That works fine.
Now suppose you launch Weston while running the Gnome session. Suddenly, all
of the Gtk+ apps launched from Gnome will show up inside Weston instead.
That's unexpected. There's also no good way to prevent that from happening
(other than perhaps setting WAYLAND_DISPLAY to an invalid value when launching
an app).
Not using wayland-0 as the default will solve that problem: an app launched
from the X11 Gnome session will use the X11 backend regardless of whether
there's a wayland compositor running at the same time.
Everything else should work as before. The compositor already sets
the WAYLAND_DISPLAY when starting the session, so the lack of the default value
should not make a difference to the user.
Signed-off-by: Dima Ryazanov <dima@gmail.com>
Acked-by: Pekka Paalanen <ppaalanen@gmail.com>
Acked-by: Giulio Camuffo <giuliocamuffo@gmail.com>
Acked-by: Daniel Stone <daniel@fooishbar.org>
Acked-by: Jasper St. Pierre <jstpierre@mecheye.net>
Reviewed-by: Ryo Munakata <ryomnktml@gmail.com>
[Pekka: dropped the wayland-server.c hunk, adjusted summary]
Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
Corrects an issue that would cause out-of-tree builds to fail and also
a few items that would cause distcheck to fail.
Signed-off-by: Jon A. Cruz <jonc@osg.samsung.com>
Reviewed-by: Bryce Harrington <bryce@osg.samsung.com>
(This patch has been modified to apply atop current master)
This makes it considerably easier to edit the text and make it different
for each library.
To address previous concerns with this patch, I wrote some more complete
introductory text. This is based on my understanding of these libraries, which
may not be correct, and is pretty rudimentary for libwayland-server!
However this intro text demonstrates how to create links to the
doxygen-generated text. It looks like you cannot link to methods easily as the
link name contains a hash number, but links to objects and classes work.
Reviewed-by: Jon A. Cruz <jonc@osg.samsung.com>
Tested-by: Jon A. Cruz <jonc@osg.samsung.com>
Otherwise a parallel make invocation could fail due to the directory
not existing.
Signed-off-by: Rui Matos <tiagomatos@gmail.com>
Reviewed-by: Jon A. Cruz <jonc@osg.samsung.com>
Added xslt processing to give DocBook output diagram image maps/hot-linked
areas consistent with those automatically generated by Doxygen.
Signed-off-by: Jon A. Cruz <jonc@osg.samsung.com>
Switches diagrams from using static PNG images to instead generate them via
simple graphviz DOT markup files.
Signed-off-by: Jon A. Cruz <jonc@osg.samsung.com>
If somebody bothered to put a doxygen comment in for a macro or
typedef, make it appear in the pages. This produces documentation
for wl_container_of and wl_dispatcher_func_t from the _8h files.
Reviewed-by: "Jon A. Cruz" <jonc@osg.samsung.com>
Reviewed-by: Bryce Harrington <bryce@osg.samsung.com>
The current xslt skips all the data that is in them, so it is ok
if they are included.
Reviewed-by: "Jon A. Cruz" <jonc@osg.samsung.com>
Reviewed-by: Bryce Harrington <bryce@osg.samsung.com>
Put the argument lists next to the event/message title, which I
think makes it a lot easier to understand, and remove redundant
"values" title from enumerations.
Reviewed-by: Derek Foreman <derekf@osg.samsung.com>
Reviewed-by: Bryce Harrington <bryce@osg.samsung.com>
This makes it a lot easier to figure out what is going on!
Reviewed-by: Derek Foreman <derekf@osg.samsung.com>
Reviewed-by: Bryce Harrington <bryce@osg.samsung.com>
Use simpara to remove the blank lines, and put the type/value and
the comment into the same line.
Reviewed-by: Derek Foreman <derekf@osg.samsung.com>
Reviewed-by: Bryce Harrington <bryce@osg.samsung.com>
This provides targets for some of the doxygen links, and some of
them have useful memberof function lists.
Added some if/else statements to reduce validation errors.
Tested-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
All the methods belonging to the class are listed with it, making
it much easier to find them.
I dumped all other functions into a section called "Functions" at
the end.
Tested-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
Just to make it slightly shorter.
Also add a dash to the doxygen links to make them look a bit more alike.
Tested-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
(this is different from previous version as it removes some
broken and irrelevant changes to the protocol appendix).
This removes all the validation errors except for missing link
targets. You can test this by removing the --skip-validation
from doc/publican/Makefile.am.
Main changes are to avoid nesting <para> commands. I also used
<simpara> in some places to reduce the amount of blank space.
And the reference id's are prefixed with the chapter name to
avoid collisions between libclient and libserver.
PS: it would be useful if somebody who actually knows something
about xslt would come up with a way to translate a block of text
makde of <para> commands unchanged, but add <para> around plain
text. Most of the difficulty is that doxygen's output is rather
inconsistent here.
Tested-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
The repetitive parts of generating the server and client documentation are
merged, so it is easier to add another doxygen chapter: add a new line to
$publican_sources in publican/Makefile.am, and a list of C source files to
doxygen/Makefile.am.
Reviewed-by: Bryce Harrington <bryce@osg.samsung.com>
Move the *_8h.xml files to a per-chapter temporary file so two
chapters can be converted from doxygen at the same time. Tested
with make -j 9.
Reviewed-by: Bryce Harrington <bryce@osg.samsung.com>
This was suggested before to make it clearer that things like wl_display
are different objects in each of them. I made these into two appendixes
because the protocol spec was already an appendix.
Reviewed-by: Bryce Harrington <b.harrington@samsung.com>
[Bryce requested minor changes, not yet here.]
Acked-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
This is a general cleanup of the makefile in order to bring it more inline
with standard make practices. Cleanups included more use of automatic
variables, switching AM_V_GEN to AM_V_at to have one 'GEN' visible per file,
splitting copy operations to proper rules, and using order only dependencies
to properly create directories on-demand.
Changes also correct missing use of $(builddir) that has gone unnoticed as
it defaults to the current directory ('.').
Signed-off-by: Jon A. Cruz <jonc@osg.samsung.com>
Acked-by: Peter Hutterer <peter.hutterer@who-t.net>
Acked-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
This text is a duplicate of the text in the protocol documentation, but
the converter mangled it by removing the paragraph breaks and some other
errors. Instead replace it with a list of links to the protocol docs.
Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>
Removed <xsl:output> elements that were duplicated but with attributes in
a different order. Standard tools are required to ignore the order of
attributes in an element.
Signed-off-by: Jon A. Cruz <jonc@osg.samsung.com>
Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>
These links are pretty useful for navigation, though sometimes excessive
(you can turn them off by putting % before the word in the comment).
I had to turn off validation because it failed on missing and duplicate
target id's, which this produces.
Doxygen represents all spacing in code blocks with <sp/> tags, so these
need to be turned back into spaces.
Signed-off-by: Benjamin Herr <ben@0x539.de>
xsl:value-of would strip all the nested markup of the selected doxygen
elements, so that \ref, \sa and \code formatting didn't actually work.
Signed-off-by: Benjamin Herr <ben@0x539.de>
Publican isn't packaged for some distros, xmlto is a lot more common. Most of
what publican provides for us is the stylesheet anyway, so we can just use
xmlto and the publican stylesheet to get roughly the same look.
PDF and XML generation has been dropped, this needs a bit more more effort
than a mere switchover to xmlto.
The top-level directory structure imposed by publican is kept for now
(specifically the Wayland/en-US/html tree). This makes it easier to transition over
for packagers. Note that the list of files inside has changed.
CSS files are taken from publican to keep a uniform look compared to previous
documentations. Stylesheets are licensed under CC0 1.0 Universal license, see
publican/LICENSE:
1. Files in the datadir/Common_Content directory and its subdirectories are
licensed under the CC0 1.0 Universal license.
To the extent possible under law, the developers of Publican waive all
copyright and related or neighboring rights to the files contained
in the datadir/Common_Content directory and its subdirectories.
Acked-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
Traced down to the server/client target always rebuilding, causing a rebuild
of everything else. Rework this so the target name is a file we actually
produce and can check for a timestamp.
Note: this also changes the generated file from the doxygen directory into the
en-US publican path and renames it to (server|client)API.xml.tmp to avoid
copying it into the xml output directory.
