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Split into a demo repository that holds the demo compositor and clients

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Kristian Høgsberg 14 years ago
parent 525e4c0bea
commit b2d71852fd
27 changed files with 24 additions and 5859 deletions
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  1. 4
      Makefile.am
  2. 134
      README
  3. 246
      TODO
  4. 16
      clients/Makefile.am
  5. 4
      compositor/Makefile.am
  6. 35
      configure.ac
  7. 5
      m4/.gitignore
  8. 483
      protocol/wayland.xml
  9. 3
      spec/.gitignore
  10. 575
      spec/main.tex
  11. 4
      wayland/.gitignore
  12. 52
      wayland/Makefile.am
  13. 729
      wayland/connection.c
  14. 68
      wayland/connection.h
  15. 444
      wayland/event-loop.c
  16. 760
      wayland/scanner.c
  17. 8
      wayland/scanner.mk
  18. 565
      wayland/wayland-client.c
  19. 75
      wayland/wayland-client.h
  20. 10
      wayland/wayland-client.pc.in
  21. 82
      wayland/wayland-egl.h
  22. 296
      wayland/wayland-hash.c
  23. 726
      wayland/wayland-server.c
  24. 265
      wayland/wayland-server.h
  25. 10
      wayland/wayland-server.pc.in
  26. 123
      wayland/wayland-util.c
  27. 157
      wayland/wayland-util.h

4
Makefile.am
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@ -1,3 +1 @@
SUBDIRS = wayland compositor clients data SUBDIRS = compositor clients data
ACLOCAL_AMFLAGS = -I m4 ${ACLOCAL_FLAGS}

134
README
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@ -1,130 +1,6 @@
What is Wayland Wayland Demos
Wayland is a project to define a protocol for a compositor to talk to This repository contains a few demos application for the Wayland
its clients as well as a library implementation of the protocol. The project. There's a sample compositor that can run on KMS, under X11
compositor can be a standalone display server running on Linux kernel or under another Wayland compositor and there's a handful of simple
modesetting and evdev input devices, an X applications, or a wayland clients that demonstrate various aspects of Wayland:
client itself. The clients can be traditional applications, X servers
(rootless or fullscreen) or other display servers.
The wayland protocol is essentially only about input handling and
buffer management. The compositor receives input events and forwards
them to the relevant client. The clients creates buffers and renders
into them and notifies the compositor when it needs to redraw. The
protocol also handles drag and drop, selections, window management and
other interactions that must go throught the compositor. However, the
protocol does not handle rendering, which is one of the features that
makes wayland so simple. All clients are expected to handle rendering
themselves, typically through cairo or OpenGL.
The wayland repository includes a compositor and a few clients, but
both the compositor and clients are essentially test cases.
Building Instructions
The instructions below assume some familiarity with git and building
and running experimental software. And be prepared that this project
isn't at all useful right now, it's still very much a prototype. When
the instructions suggest to clone a git repo, you can of course just
add a remote and fetch instead, if you have a clone of that repo
around already. I usually install all software I'm working on into
$HOME/install, so that's what I'll use in the instructions below, but
you can use your favorite directory of course or install over your
system copy (pass --prefix=/usr --sysconfdir=/etc, generally).
Modesetting
At this point, kernel modesetting is upstream for Intel, AMD and
nVidia chipsets. Most distributions ship with kernel modesetting
enabled by default and will work with Wayland out of the box. The
modesetting driver must also support the page flip ioctl, which only
the intel driver does at this point.
Building mesa
Wayland uses the mesa EGL stack, and all extensions required to run
EGL on KMS are now upstream on the master branch. The 7.9 release of
mesa will have all these extensions, but for now you'll need to build
mesa master:
$ git clone git://anongit.freedesktop.org/mesa/mesa
$ cd mesa
$ ./configure --prefix=$HOME/install --enable-egl --enable-gles2
$ make && make install
If you're using an intel chipset, it's best to also pass
--disable-gallium to ./configure, since otherwise libEGL will try to
load the gallium sw rasterizer before loading the Intel DRI driver.
libxkbcommon
Wayland needs libxkbcommon for translating evdev keycodes to keysyms.
There's a couple of repos around, and we're trying to consolidate the
development, but for wayland you'll need the repo from my git
repository. For this you'll need development packages for xproto,
kbproto and libX11.
$ git clone git://people.freedesktop.org/~krh/libxkbcommon.git
$ cd libxkbcommon/
$ ./autogen.sh --prefix=$HOME/install
$ make && make install
cairo-gl
The Wayland clients render using cairo-gl, which is an experimental
cairo backend. It has been available since cairo 1.10. Unless your
distribution ships cairo with the gl backend enabled, you'll need to
compile your own version of cairo:
$ git clone git://anongit.freedesktop.org/cairo
$ cd cairo
$ ./autogen.sh --prefix=$HOME/install --enable-gl
$ make && make install
Wayland
With mesa and libxkbcommon in place, we can checkout and build
Wayland. Aside from mesa, Wayland needs development packages for
gdk-pixbuf-2.0, libudev, libdrm, xcb-dri2, xcb-fixes (for X
compositor) cairo-gl, glib-2.0, gdk-2.0 (for poppler) and
poppler-glib:
$ git clone git://people.freedesktop.org/~krh/wayland
$ ./autogen.sh --prefix=$HOME/install
$ make && make install
Installing into a non-/usr prefix is fine, but the 70-wayland.rules
udev rule file has to be installed in /etc/udev/rules.d. Once
installed, either reboot or run
$ sudo udevadm trigger --subsystem-match=drm --subsystem-match=input
to make udev label the devices wayland will use.
If DISPLAY is set, the wayland compositor will run under X in a window
and take input from X. Otherwise it will run on the KMS framebuffer
and take input from evdev devices. Pick a background image that you
like and copy it to the Wayland source directory as background.jpg or
use the -b command line option:
$ ./wayland-system-compositor -b my-image.jpg
To run clients, switch to a different VT and run the client from
there. Or run it under X and start up the clients from a terminal
window. There are a few demo clients available, but they are all
pretty simple and mostly for testing specific features in the wayland
protocol: 'terminal' is a simple terminal emulator, not very compliant
at all, but works well enough for bash
'flower' moves a flower around the screen, testing the frame protocol
'gears' glxgears, but for wayland, currently broken
'image' loads the image files passed on the command line and shows them
'view' does the same for pdf files, but needs file URIs
(file:///path/to/pdf)

246
TODO
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@ -1,246 +0,0 @@
Core wayland protocol
- surface.set_grab_mode(GRAB_OWNER_EVENTS vs GRAB_SURFACE_EVENTS), to
make menus work right: click and drag in a menubar grabs the
pointer to the menubar (which we need for detecting motion into
another menu item), but we need events for the popup menu surface
as well.
- The message format has to include information about number of fds
in the message so we can skip a message correctly. Or we should
just give up on trying to recover from unknown messages. We need
to make sure you never get a message from an interface you don't
know about (using per-client id space and subscribe) or include
information on number of fds, so marshalling logic can skip.
- generate pointer_focus (and drag focus) on raise/lower, move
windows, all kinds of changes in surface stacking.
- glyph cache
buffer = drm.create_buffer(); /* buffer with stuff in it */
cache.upload(buffer, x, y, width, height, int hash)
drm.buffer: id, name, stride etc /* event to announce cache buffer */
cache.image: hash, buffer, x, y, stride /* event to announce
* location in cache */
cache.reject: hash /* no upload for you! */
cache.retire: buffer /* cache has stopped using buffer, please
* reupload whatever you had in that buffer */
- DnD issues:
Root window must send NULL type (to decline drop) or
x-wayland/root-something type if the source offers that. But the
target deletes the drag_offer object when drag.pointer_focus leaves
the surface...
How do we animate the drag icon back to the drag origin in case of
a failed drag?
How to handle surfaces from clients that don't know about dnd or
don't care? Maybe the dnd object should have a
dnd.register_surface() method so clients can opt-in the surfaces
that will participate in dnd. Or just assume client is not
participating until we receive an accept request.
- Selection/copy+paste issues: is it sufficient to only introduce the
selection offer when a client receives kb focus? Or maybe it is
actually a security feature? Clipboard manager in server for
retained selections?
- Pointer image issue:
- A direct touch input device (eg touch screen) doesn't have a
pointer; indicate that somehow.
- Cursor themes, tie in with glyph/image cache.
- Discard buffer, as in "wayland discarded your buffer, it's no
longer visible, you can stop updating it now.", reattach, as in "oh
hey, I'm about to show your buffer that I threw away, what was it
again?". for wayland system compositor vt switcing, for example,
to be able to throw away the surfaces in the session we're
switching away from. for minimized windows that we don't want live
thumb nails for. etc.
- Import relevants bits from EWMH spec, stuff like window title,
window class, app groups, icons, lower window, need attention,
fullscreen (maybe different types of fullscreen).
- Per client id space. Each client has an entire 32 bit id namespace
to itself. On the server side, each struct wl_client has an object
hash table. Object announcements use a server id space and clients
must respond with subscribe request with a client id for the
object. Part of wl_proxy_create_for_id():
wl_display_subscribe(display, id, new_id, my_version);
or maybe
wl_display_bind(display, id, new_id, my_version);
Fixes a few things:
- Maps the global object into the client id space, lets client
allocate the id. All ids are allocated by the client this way,
which fixes the range protocol problem.
- Tells the server that the client is interested in events from
the object. Lets the server know that a client participates in a
certain protocol (like drag and drop), so the server can account
for whether or not the client is expected to reply
- Server emits initial object state event(s) in reponse to
receiving the subscribe request. Introduces an extra round trip
at initialization time, but the server will still announces all
objects in one burst and the client can subscribe in a burst as
well.
- Separates client resources, since each client will have it's own
hash table. It's not longer possible to guess the id of another
surface and access it.
- Server must track the client id for each client an object is
exposed to. In some cases we know this (a surface is always
only owned by one client), in other cases it provides a way to
track who's interested in the object events. For input device
events, we can look up the client name when it receives pointer
focus or keyboard focus and cache it in the device.
- Server must know which id to send when passing object references
in events. We could say that any object we're passing to a
client must have a server id, and each client has a server id ->
client id hash.
- When a surface is the size of the screen and on top, we can set the
scanout buffer to that surface directly. Like compiz unredirect
top-level window feature. Except it won't have any protocol state
side-effects and the client that owns the surface won't know. We
lose control of updates. Should work well for X server root window
under wayland. Should be possible for yuv overlays as well.
- what about cursors then? maybe use hw cursors if the cursor
satisfies hw limitations (64x64, only one cursor), switch to
composited cursors if not.
- clients needs to allocate the surface to be suitable for
scanout, which they can do whenever they go fullscreen.
- multihead, screen geometry and crtc layout protocol, hotplug, lcd
subpixel info
- a wayland settings protocol to tell clients about themes (icons,
cursors, widget themes), fonts details (family, hinting
preferences) etc. Just send all settings at connect time, send
updates when a setting change. Getting a little close to gconf
here, but could be pretty simple:
interface "settings":
event int_value(string name, int value)
event string_value(string name, string value)
but maybe it's better to just require that clients get that from
somewhere else (gconf/dbus).
- input device discovery, hotplug
- Advertise axes as part of the discovery, use something like
"org.wayland.input.x" to identify the axes.
- keyboard state, layout events at connect time and when it
changes, keyboard leds
- relative events
- multi touch?
- synaptics, 3-button emulation, scim
- drm bo access control, authentication, flink_to
- Range protocol may not be sufficient... if a server cycles through
2^32 object IDs we don't have a way to handle wrapping. And since
we hand out a range of 256 IDs to each new clients, we're just
talking about 2^24 clients. That's 31 years with a new client
every minute... Maybe just use bigger ranges, then it's feasible
to track and garbage collect them when a client dies.
- Add protocol to let applications specify the effective/logical
surface rectangle, that is, the edge of the window, ignoring drop
shadows and other padding. The compositor needs this for snapping
and constraining window motion. Also, maybe communicate the opaque
region of the window (or just a conservative, simple estimate), to
let the compositor reduce overdraw.
- multi gpu, needs queue and seqno to wait on in requests
Clients and ports
- port gtk+
- draw window decorations in gtkwindow.c
- Details about pointer grabs. wayland doesn't have active grabs,
menus will behave subtly different. Under X, clicking a menu
open grabs the pointer and clicking outside the window pops down
the menu and swallows the click. without active grabs we can't
swallow the click. I'm sure there much more...
- Port Qt? There's already talk about this on the list.
- X on Wayland
- move most of the code from xf86-video-intel into a Xorg wayland
module.
- don't ask KMS for available output and modes, use the info from
the wayland server. then stop mooching off of drmmode.c.
- map multiple wayland input devices to MPX in Xorg.
- rootless; avoid allocating and setting the front buffer, draw
window decorations in the X server (!), how to map input?
- gnome-shell as a wayland session compositor
- runs as a client of the wayland session compositor, uses
clutter+egl on wayland
- talks to an Xorg server as the compositing and window manager
for that server and renders the output to a wayland surface.
the Xorg server should be modified to take input from the system
compositor through gnome-shell, but not allocate a front buffer.
- make gnome-shell itself a nested wayland server and allow native
wayland clients to connect and can native wayland windows with
the windows from the X server.
- qemu as a wayland client; session surface as X case
- qemu has too simple acceleration, so a Wayland backend like the
SDL/VNC ones it has now is trivial.
- paravirt: forward wayland screen info as mmio, expose gem ioctls as mmio
- mapping vmem is tricky, should try to only use ioctl (pwrite+pread)
- not useful for Windows without a windows paravirt driver.
- two approaches: 1) do a toplevel qemu window, or 2) expose a
wayland server in the guest that forwards to the host wayland
server, ie a "remote" compositor, but with the gem buffers
shared. could do a wl_connection directly on mmio memory, with
head and tail pointers. use an alloc_head register to indicate
desired data to write, if it overwrites tail, block guest. just
a socket would be easier.
- moblin as a wayland compositor
- clutter as a wayland compositors
- argh, mutter

16
clients/Makefile.am
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@ -11,7 +11,7 @@ noinst_PROGRAMS = \
simple-client \ simple-client \
eventdemo eventdemo
noinst_LTLIBRARIES = libtoytoolkit.la noinst_LIBRARIES = libtoytoolkit.a
AM_CFLAGS = $(GCC_CFLAGS) AM_CFLAGS = $(GCC_CFLAGS)
AM_CPPFLAGS = \ AM_CPPFLAGS = \
@ -20,7 +20,7 @@ AM_CPPFLAGS = \
-I$(top_srcdir)/wayland \ -I$(top_srcdir)/wayland \
$(CLIENT_CFLAGS) $(CLIENT_CFLAGS)
libtoytoolkit_la_SOURCES = \ libtoytoolkit_a_SOURCES = \
window.c \ window.c \
window.h \ window.h \
wayland-glib.c \ wayland-glib.c \
@ -29,9 +29,8 @@ libtoytoolkit_la_SOURCES = \
cairo-util.h cairo-util.h
toolkit_libs = \ toolkit_libs = \
libtoytoolkit.la \ libtoytoolkit.a \
$(top_builddir)/wayland/libwayland-client.la \ $(CLIENT_LIBS) -lrt -lm
$(CLIENT_LIBS) -lrt -lm -lwayland-egl
gears_SOURCES = gears.c gears_SOURCES = gears.c
gears_LDADD = $(toolkit_libs) gears_LDADD = $(toolkit_libs)
@ -58,10 +57,7 @@ resizor_SOURCES = resizor.c
resizor_LDADD = $(toolkit_libs) resizor_LDADD = $(toolkit_libs)
simple_client_SOURCES = simple-client.c simple_client_SOURCES = simple-client.c
simple_client_LDADD = \ simple_client_LDADD = $(SIMPLE_CLIENT_LIBS) -lm
$(top_builddir)/wayland/libwayland-client.la -lm \
$(GLES2_LIBS) \
-lwayland-egl
eventdemo_SOURCES = eventdemo.c eventdemo_SOURCES = eventdemo.c
eventdemo_LDADD = $(toolkit_libs) eventdemo_LDADD = $(toolkit_libs)
@ -72,7 +68,7 @@ BUILT_SOURCES = \
CLEANFILES = $(BUILT_SOURCES) CLEANFILES = $(BUILT_SOURCES)
include $(top_srcdir)/wayland/scanner.mk @wayland_scanner_rules@
if HAVE_POPPLER if HAVE_POPPLER
poppler_programs = view poppler_programs = view

4
compositor/Makefile.am
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@ -9,8 +9,6 @@ AM_CPPFLAGS = \
AM_CFLAGS = $(GCC_CFLAGS) AM_CFLAGS = $(GCC_CFLAGS)
compositor_LDADD = \ compositor_LDADD = \
$(top_builddir)/wayland/libwayland-server.la \
$(top_builddir)/wayland/libwayland-client.la \
$(COMPOSITOR_LIBS) $(COMPOSITOR_LIBS)
if ENABLE_DRM_COMPOSITOR if ENABLE_DRM_COMPOSITOR
@ -52,4 +50,4 @@ BUILT_SOURCES = \
CLEANFILES = $(BUILT_SOURCES) CLEANFILES = $(BUILT_SOURCES)
include $(top_srcdir)/wayland/scanner.mk @wayland_scanner_rules@

35
configure.ac
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@ -1,12 +1,11 @@
AC_PREREQ([2.64]) AC_PREREQ([2.64])
AC_INIT([wayland], AC_INIT([wayland-demos],
[0.1], [0.1],
[https://bugs.freedesktop.org/enter_bug.cgi?product=wayland], [https://bugs.freedesktop.org/enter_bug.cgi?product=wayland],
[wayland], [wayland-demos],
[http://wayland.freedesktop.org/]) [http://wayland.freedesktop.org/])
AC_CONFIG_HEADERS([config.h]) AC_CONFIG_HEADERS([config.h])
AC_CONFIG_MACRO_DIR([m4])
AM_INIT_AUTOMAKE([1.11 foreign dist-bzip2]) AM_INIT_AUTOMAKE([1.11 foreign dist-bzip2])
@ -14,18 +13,14 @@ AM_SILENT_RULES([yes])
# Check for programs # Check for programs
AC_PROG_CC AC_PROG_CC
AC_PROG_RANLIB
# Initialize libtool
LT_PREREQ([2.2])
LT_INIT
PKG_PROG_PKG_CONFIG() PKG_PROG_PKG_CONFIG()
PKG_CHECK_MODULES(FFI, [libffi])
PKG_CHECK_MODULES(COMPOSITOR, PKG_CHECK_MODULES(COMPOSITOR,
[egl >= 7.10 glesv2 gdk-pixbuf-2.0 libudev >= 136 libdrm >= 2.4.23] pixman-1 xcb-dri2 xcb-xfixes) [wayland-server wayland-client egl >= 7.10 glesv2 gdk-pixbuf-2.0 libudev >= 136 libdrm >= 2.4.23] pixman-1 xcb-dri2 xcb-xfixes)
PKG_CHECK_MODULES(GLES2, [egl >= 7.10 glesv2]) PKG_CHECK_MODULES(SIMPLE_CLIENT, [egl >= 7.10 glesv2 wayland-client wayland-egl])
PKG_CHECK_MODULES(CLIENT, [egl >= 7.10 gl cairo >= 1.10.0 gdk-pixbuf-2.0 glib-2.0 gobject-2.0 xkbcommon]) PKG_CHECK_MODULES(CLIENT, [wayland-client wayland-egl egl >= 7.10 gl cairo >= 1.10.0 gdk-pixbuf-2.0 glib-2.0 gobject-2.0 xkbcommon])
PKG_CHECK_MODULES(POPPLER, [poppler-glib gdk-2.0 gio-2.0], PKG_CHECK_MODULES(POPPLER, [poppler-glib gdk-2.0 gio-2.0],
[have_poppler=yes], [have_poppler=no]) [have_poppler=yes], [have_poppler=no])
AM_CONDITIONAL(HAVE_POPPLER, test "x$have_poppler" = "xyes") AM_CONDITIONAL(HAVE_POPPLER, test "x$have_poppler" = "xyes")
@ -69,26 +64,14 @@ if test "x$GCC" = "xyes"; then
fi fi
AC_SUBST(GCC_CFLAGS) AC_SUBST(GCC_CFLAGS)
EXPAT_LIB=""
AC_ARG_WITH(expat, [ --with-expat=<dir> Use expat from here],
[ expat=$withval
CPPFLAGS="$CPPFLAGS -I$withval/include"
LDFLAGS="$LDFLAGS -L$withval/lib" ] )
AC_CHECK_HEADERS(expat.h, [AC_DEFINE(HAVE_EXPAT_H)],
[AC_MSG_ERROR([Can't find expat.h. Please install expat.])])
AC_CHECK_LIB(expat, XML_ParserCreate, [EXPAT_LIBS="-lexpat"],
[AC_MSG_ERROR([Can't find expat library. Please install expat.])])
AC_SUBST(EXPAT_LIBS)
# workaround a bug in xcb-dri2 generated by xcb-proto 1.6 # workaround a bug in xcb-dri2 generated by xcb-proto 1.6
AC_CHECK_LIB(xcb-dri2, xcb_dri2_connect_alignment_pad, [], AC_CHECK_LIB(xcb-dri2, xcb_dri2_connect_alignment_pad, [],
[AC_DEFINE([XCB_DRI2_CONNECT_DEVICE_NAME_BROKEN], [1], [AC_DEFINE([XCB_DRI2_CONNECT_DEVICE_NAME_BROKEN], [1],
[Define to 1 if xcb_dri2_connect_device_name is broken])]) [Define to 1 if xcb_dri2_connect_device_name is broken])])
AC_CONFIG_FILES([wayland/wayland-server.pc WAYLAND_SCANNER_RULES(['$(top_srcdir)/protocol'])
wayland/wayland-client.pc
Makefile AC_CONFIG_FILES([Makefile
wayland/Makefile
compositor/Makefile compositor/Makefile
clients/Makefile clients/Makefile
data/Makefile]) data/Makefile])

5
m4/.gitignore vendored
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@ -1,5 +0,0 @@
libtool.m4
ltoptions.m4
ltsugar.m4
ltversion.m4
lt~obsolete.m4

483
protocol/wayland.xml
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@ -1,483 +0,0 @@
<?xml version="1.0" encoding="UTF-8"?>
<protocol name="wayland">
<!-- The core global object. This is a special singleton object.
It is used for internal wayland protocol features. -->
<interface name="display" version="1">
<!-- sync is an just an echo, which will reply with a sync event.
Since requests are handled in-order, this can be used as a
barrier to ensure all previous requests have ben handled.
The key argument can be used to correlate between multiple
sync invocations. -->
<request name="sync">
<arg name="key" type="uint"/>
</request>
<!-- Request notification when the next frame is displayed.
Useful for throttling redrawing operations, and driving
animations. The notification will only be posted for one
frame unless requested again. -->
<request name="frame">
<arg name="key" type="uint"/>
</request>
<!-- A request addressed a non-existent object id. This is
tyipcally a fatal error. -->
<event name="invalid_object">
<arg name="object_id" type="uint"/>
</event>
<!-- A request tried to invoke an opcode out of range. This is
typically a fatal error. -->
<event name="invalid_method">
<arg name="object_id" type="uint"/>
<arg name="opcode" type="uint"/>
</event>
<!-- A request has failed due to an out of memory error. -->
<event name="no_memory"/>
<!-- Notify the client of global objects. These are objects that
are created by the server. Globals are published on the
initial client connection sequence, upon device hotplugs,
device disconnects, reconfiguration or other events. The
server will always announce an object before the object sends
out events. -->
<event name="global">
<arg name="id" type="new_id" interface="object"/>
<arg name="name" type="string"/>
<arg name="version" type="uint"/>
</event>
<!-- Internal, deprecated, and will be changed. This is an object
IDs range that is used by the client to allocate object IDs
in "new_id" type arguments. The server sends range
allocations to the client before the next range is about to
be depleted. -->
<event name="range">
<arg name="base" type="uint"/>
</event>
<!-- A reply to the frame or sync request. The key is the one
used in the request. time is in millisecond units, and
denotes the time when the frame was posted on the
display. time can be used to estimaate frame rate, determine
how much to advance animations and compensate for jitter. -->
<event name="key">
<arg name="key" type="uint"/>
<arg name="time" type="uint"/>
</event>
</interface>
<!-- A compositor. This object is a global. The compositor is in
charge of combining the contents of multiple surfaces into one
displayable output. -->
<interface name="compositor" version="1">
<!-- Factory request for a surface objects. A surface is akin to a
window. -->
<request name="create_surface">
<arg name="id" type="new_id" interface="surface"/>
</request>
</interface>
<!-- drm support. This object is created by the server and published
using the display's global event. -->
<interface name="drm" version="1">
<!-- Call this request with the magic received from drmGetMagic().
It will be passed on to the drmAuthMagic() or
DRIAuthConnection() call. This authentication must be
completed before create_buffer could be used. -->
<request name="authenticate">
<arg name="id" type="uint"/>
</request>
<!-- Create a wayland buffer for the named DRM buffer. The DRM
surface must have a name using the flink ioctl -->
<request name="create_buffer">
<arg name="id" type="new_id" interface="buffer"/>
<arg name="name" type="uint"/>
<arg name="width" type="int"/>
<arg name="height" type="int"/>
<arg name="stride" type="uint"/>
<arg name="visual" type="object" interface="visual"/>
</request>
<!-- Notification of the path of the drm device which is used by
the server. The client should use this device for creating
local buffers. Only buffers created from this device should
be be passed to the server using this drm object's
create_buffer request. -->
<event name="device">
<arg name="name" type="string"/>
</event>
<!-- Raised if the authenticate request succeeded -->
<event name="authenticated"/>
</interface>
<!-- Shared memory support -->
<interface name="shm" version="1">
<!-- Transfer a shm buffer to the server. The allocated buffer
would include at least stride * height bytes starting at the
beginning of fd. The file descriptor is transferred over the
socket using AF_UNIX magical features. width, height, stride
and visual describe the respective properties of the pixel
data contained in the buffer. -->
<request name="create_buffer">
<arg name="id" type="new_id" interface="buffer"/>
<arg name="fd" type="fd"/>
<arg name="width" type="int"/>
<arg name="height" type="int"/>
<arg name="stride" type="uint"/>
<arg name="visual" type="object" interface="visual"/>
</request>
</interface>
<!-- A pixel buffer. Created using the drm, shm or similar objects.
It has a size, visual and contents, but not a location on the
screen -->
<interface name="buffer" version="1">
<!-- Abandon a buffer. This will invalidate the object id. -->
<request name="destroy" type="destructor"/>
</interface>
<interface name="shell" version="1">
<request name="move">
<arg name="surface" type="object" interface="surface"/>
<arg name="input_device" type="object" interface="input_device"/>
<arg name="time" type="uint"/>
</request>
<enum name="resize">
<entry name="none" value="0"/>
<entry name="top" value="1"/>
<entry name="bottom" value="2"/>
<entry name="left" value="4"/>
<entry name="top_left" value="5"/>
<entry name="bottom_left" value="6"/>
<entry name="right" value="8"/>
<entry name="top_right" value="9"/>
<entry name="bottom_right" value="10"/>
</enum>
<request name="resize">
<arg name="surface" type="object" interface="surface"/>
<arg name="input_device" type="object" interface="input_device"/>
<arg name="time" type="uint"/>
<!-- edges is an enum, need to get the values in here -->
<arg name="edges" type="uint"/>
</request>
<request name="create_drag">
<arg name="id" type="new_id" interface="drag"/>
</request>
<request name="create_selection">
<arg name="id" type="new_id" interface="selection"/>
</request>
<!-- The configure event asks the client to resize its surface.
The size is a hint, in the sense that the client is free to
ignore it if it doesn't resize, pick a smaller size (to
satisfy aspect ration or resize in steps of NxM pixels). The
client is free to dismiss all but the last configure event it
received. -->
<event name="configure">
<arg name="time" type="uint"/>
<arg name="edges" type="uint"/>
<arg name="surface" type="object" interface="surface"/>
<arg name="width" type="int"/>
<arg name="height" type="int"/>
</event>
</interface>
<interface name="selection" version="1">
<!-- Add an offered mime type. Can be called several times to
offer multiple types, but must be called before 'activate'. -->
<request name="offer">
<arg name="type" type="string"/>
</request>
<!-- Can the selection be activated for multiple devices? -->
<request name="activate">
<arg name="input_device" type="object" interface="input_device"/>
<arg name="time" type="uint"/>
</request>
<!-- Destroy the selection. -->
<request name="destroy" type="destructor"/>
<!-- Another client pasted the selection, send the mime-type over
the passed fd. -->
<event name="send">
<arg name="mime_type" type="string"/>
<arg name="fd" type="fd"/>
</event>
<!-- Another selection became active. -->
<event name="cancelled"/>
</interface>
<interface name="selection_offer" version="1">
<!-- Called to receive the selection data as the specified type.
Sends the pipe fd to the compositor, which forwards it to the
source in the 'send' event -->
<request name="receive">
<arg name="mime_type" type="string"/>
<arg name="fd" type="fd"/>
</request>
<!-- Sent before the keyboard_focus event to announce the types
offered. One event per offered mime type. A mime type of
NULL means the selection offer is going away. -->
<event name="offer">
<arg name="type" type="string"/>
</event>
<event name="keyboard_focus">
<arg name="input_device" type="object" interface="input_device"/>
</event>
</interface>
<interface name="drag" version="1">
<!-- Add an offered mime type. Can be called several times to
offer multiple types, but must be called before 'activate'. -->
<request name="offer">
<arg name="type" type="string"/>
</request>
<request name="activate">
<arg name="surface" type="object" interface="surface"/>
<arg name="input_device" type="object" interface="input_device"/>
<arg name="time" type="uint"/>
</request>
<!-- Destroy the drag and cancel the session. -->
<request name="destroy" type="destructor"/>
<!-- Sent when a target accepts pointer_focus or motion events.
If a target does not accept any of the offered types, type is
NULL -->
<event name="target">
<arg name="mime_type" type="string"/>
</event>
<!-- Sent when the drag is finished. The final mime type is that
of the last target event. If that was NULL, no drag target
was valid when the drag finished, fd is undefined and the
source should not send data. The event is also sent in case
a drag source tries to activate a drag after the grab was
released, in which case mime_type will also be NULL. -->
<event name="finish">
<arg name="fd" type="fd"/>
</event>
<event name="reject"/>
</interface>
<interface name="drag_offer" version="1">
<!-- Call to accept the offer of the given type -->
<request name="accept">
<arg name="time" type="uint"/>
<arg name="type" type="string"/>
</request>
<!-- Called to initiate the drag finish sequence. Sends the pipe
fd to the compositor, which forwards it to the source in the
'finish' event -->
<request name="receive">
<arg name="fd" type="fd"/>
</request>
<!-- Called to reject a drop -->
<request name="reject"/>
<!-- Sent before the pointer_focus event to announce the types
offered. One event per offered mime type. -->
<event name="offer">
<arg name="type" type="string"/>
</event>
<!-- Similar to device::pointer_focus. Sent to potential target
surfaces to offer drag data. If the device leaves the
window, the drag stops or the originator cancels the drag,
this event is sent with the NULL surface, at which point the
drag object may no longer be valid. -->
<event name="pointer_focus">
<arg name="time" type="uint"/>
<arg name="surface" type="object" interface="surface"/>
<arg name="x" type="int"/>
<arg name="y" type="int"/>
<arg name="surface_x" type="int"/>
<arg name="surface_y" type="int"/>
</event>
<!-- Similar to device::motion. Sent to potential target surfaces
as the drag pointer moves around in the surface. -->
<event name="motion">
<arg name="time" type="uint"/>
<arg name="x" type="int"/>
<arg name="y" type="int"/>
<arg name="surface_x" type="int"/>
<arg name="surface_y" type="int"/>
</event>
<!-- Sent to indicate that the drag is finishing. The last
motion/pointer_focus event gives the location of the drop.
Target must respond with the 'receive' request, which sends
an fd to the source for writing the drag data. -->
<event name="drop"/>
</interface>
<!-- A surface. This is an image that is displayed on the screen.
It has a location, size and pixel contents. Similar to a window. -->
<interface name="surface" version="1">
<!-- Deletes the surface and invalidates its object id. -->
<request name="destroy" type="destructor"/>
<!-- Copy the contents of a buffer into this surface. The x and y
arguments specify the location of the new buffers upper left
corner, relative to the old buffers upper left corner. -->
<request name="attach">
<arg name="buffer" type="object" interface="buffer"/>
<arg name="x" type="int"/>
<arg name="y" type="int"/>
</request>
<!-- Make the surface visible as a toplevel window. -->
<request name="map_toplevel"/>
<!-- Map the surface relative to an existing surface. The x and y
arguments specify the locations of the upper left corner of
the surface relative to the upper left corner of the parent
surface. The flags argument controls overflow/clipping
behaviour when the surface would intersect a screen edge,
panel or such. And possibly whether the offset only
determines the initial position or if the surface is locked
to that relative position during moves. -->
<request name="map_transient">
<arg name="parent" type="object" interface="surface"/>
<arg name="x" type="int"/>
<arg name="y" type="int"/>
<arg name="flags" type="uint"/>
</request>
<!-- Map the surface as a fullscreen surface. There are a number
of options here: on which output? if the surface size doesn't
match the output size, do we scale, change resolution, or add
black borders? is that something the client controls? what
about transient surfaces, do they float on top of the
fullscreen? what if there's already a fullscreen surface on
the output, maybe you can only go fullscreen if you're
active? -->
<request name="map_fullscreen"/>
<!-- Notify the server that the attached buffer's contents have
changed, and request a redraw. The arguments allow you to
damage only a part of the surface, but the server may ignore
it and redraw the entire contents of the surface. To
describe a more complicated area of damage, use this request
several times. -->
<request name="damage">
<arg name="x" type="int"/>
<arg name="y" type="int"/>
<arg name="width" type="int"/>
<arg name="height" type="int"/>
</request>
</interface>
<!-- A group of keyboards and pointer devices (mice, for
example). This object is published as a global during start up,
or when such a device is hot plugged. A input_device group
typically has a pointer and maintains a keyboard_focus and a
pointer_focus. -->
<interface name="input_device" version="1">
<!-- Set the pointer's image. This request only takes effect if
the pointer focus for this device is one of the requesting
clients surfaces. -->
<request name="attach">
<arg name="time" type="uint"/>
<arg name="buffer" type="object" interface="buffer"/>
<arg name="hotspot_x" type="int"/>
<arg name="hotspot_y" type="int"/>
</request>
<!-- Notification of pointer location change.
x,y are the absolute location on the screen.
surface_[xy] are the location relative to the focused surface. -->
<event name="motion">
<arg name="time" type="uint"/>
<arg name="x" type="int"/>
<arg name="y" type="int"/>
<arg name="surface_x" type="int"/>
<arg name="surface_y" type="int"/>
</event>
<!-- Mouse button click and release notifications. The location
of the click is given by the last motion or pointer_focus
event. -->
<event name="button">
<arg name="time" type="uint"/>
<arg name="button" type="uint"/>
<arg name="state" type="uint"/>
</event>
<!-- Keyboard press. -->
<event name="key">
<arg name="time" type="uint"/>
<arg name="key" type="uint"/>
<arg name="state" type="uint"/>
</event>
<!-- Notification that this input device's pointer is focused on
certain surface. When an input_device enters a surface, the
pointer image is undefined and a client should respond to
this event by setting an apropriate pointer image. -->
<event name="pointer_focus">
<arg name="time" type="uint"/>
<arg name="surface" type="object" interface="surface"/>
<arg name="x" type="int"/>
<arg name="y" type="int"/>
<arg name="surface_x" type="int"/>
<arg name="surface_y" type="int"/>
</event>
<event name="keyboard_focus">
<arg name="time" type="uint"/>
<arg name="surface" type="object" interface="surface"/>
<arg name="keys" type="array"/>
</event>
</interface>
<!-- An output describes part of the compositor geometry. The
compositor work in the 'compositor coordinate system' and an
output corresponds to rectangular area in that space that is
actually visible. This typically corresponds to a monitor that
displays part of the compositor space. This object is
published as global during start up, or when a screen is hot
plugged. -->
<interface name="output" version="1">
<!-- Notification about the screen size. -->
<event name="geometry">
<arg name="x" type="int"/>
<arg name="y" type="int"/>
<arg name="width" type="int"/>
<arg name="height" type="int"/>
</event>
</interface>
<!-- A visual is the pixel format. The different visuals are
currently only identified by the order they are advertised by
the 'global' events. We need something better. -->
<interface name="visual" version="1"/>
</protocol>

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\documentclass{article}
\usepackage{palatino}
\author{Kristian Høgsberg\\
\texttt{krh@bitplanet.net}
}
\title{The Wayland Display Server}
\begin{document}
\maketitle
\section{Wayland Overview}
\begin{itemize}
\item wayland is a protocol for a new display server.
\item wayland is an implementation
\end{itemize}
\subsection{Replacing X11}
Over time, a lot of functionality have slowly moved out of the X
server and into client-side libraries or kernel drivers. One of the
first components to move out was font rendering, with freetype and
fontconfig providing an alternative to the core X fonts. Direct
rendering OpenGL as a graphics driver in a client side library. Then
cairo came along and provided a modern 2D rendering library
independent of X and compositing managers took over control of the
rendering of the desktop. Recently with GEM and KMS in the Linux
kernel, we can do modesetting outside X and schedule several direct
rendering clients. The end result is a highly modular graphics stack.
\subsection{Make the compositing manager the display server}
Wayland is a new display server building on top of all those
components. We are trying to distill out the functionality in the X
server that is still used by the modern Linux desktop. This turns out
to be not a whole lot. Applications can allocate their own off-screen
buffers and render their window contents by themselves. In the end,
what’s needed is a way to present the resulting window surface to a
compositor and a way to receive input. This is what Wayland provides,
by piecing together the components already in the eco-system in a
slightly different way.
X will always be relevant, in the same way Fortran compilers and VRML
browsers are, but it’s time that we think about moving it out of the
critical path and provide it as an optional component for legacy
applications.
\section{Wayland protocol}
\subsection{Basic Principles}
The wayland protocol is an asynchronous object oriented protocol. All
requests are method invocations on some object. The request include
an object id that uniquely identifies an object on the server. Each
object implements an interface and the requests include an opcode that
identifies which method in the interface to invoke.
The server sends back events to the client, each event is emitted from
an object. Events can be error conditions. The event includes the
object id and the event opcode, from which the client can determine
the type of event. Events are generated both in response to a request
(in which case the request and the event constitutes a round trip) or
spontanously when the server state changes.
\begin{itemize}
\item state is broadcast on connect, events sent out when state
change. client must listen for these changes and cache the state.
no need (or mechanism) to query server state.
\item server will broadcast presence of a number of global objects,
which in turn will broadcast their current state.
\end{itemize}
\subsection{Code generation}
The interfaces, requests and events are defined in protocol/wayland.xml.
This xml is used to generate the function prototypes that can be used by
clients and compositors.
The protocol entry points are generated as inline functions which just
wraps the \verb:wl_proxy_*: functions. The inline functions aren't
part of the library ABI and languange bindings should generate their
own stubs for the protocl entry points from the xml.
\subsection{Wire format}
The protocol is sent over a UNIX domain stream socket. Currently, the
endpoint is named \texttt{\textbackslash0wayland}, but it is subject
to change. The protocol is message-based. A message sent by a client
to the server is called \texttt{request}. A message from the server
to a client is called \texttt{event}. Every message is structured as
32-bit words, values are represented in the host's byte-order.
The message header has 2 words in it:
\begin{itemize}
\item The first word is the sender's object id (32-bit).
\item The second has 2 parts of 16-bit. The upper 16-bits are the message
size in bytes, starting at the header (i.e. it has a minimum value of 8).
The lower is the request/event opcode.
\end{itemize}
The payload describes the request/event arguments. Every argument is always
aligned to 32-bit. There is no prefix that describes the type, but it is
inferred implicitly from the xml specification.
The representation of argument types are as follows:
\begin{itemize}
\item "int" or "uint": The value is the 32-bit value of the signed/unsigned
int.
\item "string": Starts with an unsigned 32-bit length, followed by the
string contents, including terminating NUL byte, then padding to a
32-bit boundary.
\item "object": A 32-bit object ID.
\item "new\_id": the 32-bit object ID. On requests, the client
decides the ID. The only event with "new\_id" is advertisements of
globals, and the server will use IDs below 0x10000.
\item "array": Starts with 32-bit array size in bytes, followed by the array
contents verbatim, and finally padding to a 32-bit boundary.
\item "fd": the file descriptor is not stored in the message buffer, but in
the ancillary data of the UNIX domain socket message (msg\_control).
\end{itemize}
\subsection{Connect Time}
\begin{itemize}
\item no fixed format connect block, the server emits a bunch of
events at connect time
\item presence events for global objects: output, compositor, input
devices
\end{itemize}
\subsection{Security and Authentication}
\begin{itemize}
\item mostly about access to underlying buffers, need new drm auth
mechanism (the grant-to ioctl idea), need to check the cmd stream?
\item getting the server socket depends on the compositor type, could
be a system wide name, through fd passing on the session dbus. or
the client is forked by the compositor and the fd is already opened.
\end{itemize}
\subsection{Creating Objects}
\begin{itemize}
\item client allocates object ID, uses range protocol
\item server tracks how many IDs are left in current range, sends new
range when client is about to run out.
\end{itemize}
\subsection{Compositor}
The compositor is a global object, advertised at connect time.
\begin{tabular}{l}
\hline
Interface \texttt{compositor} \\ \hline
Requests \\ \hline
\texttt{create\_surface(id)} \\
\texttt{commit()} \\ \hline
Events \\ \hline
\texttt{device(device)} \\
\texttt{acknowledge(key, frame)} \\
\texttt{frame(frame, time)} \\ \hline
\end{tabular}
\begin{itemize}
\item a global object
\item broadcasts drm file name, or at least a string like drm:/dev/card0
\item commit/ack/frame protocol
\end{itemize}
\subsection{Surface}
Created by the client.
\begin{tabular}{l}
\hline
Interface \texttt{surface} \\ \hline
Requests \\ \hline
\texttt{destroy()} \\
\texttt{attach()} \\
\texttt{map()} \\
\texttt{damage()} \\ \hline
Events \\ \hline
no events \\ \hline
\end{tabular}
Needs a way to set input region, opaque region.
\subsection{Input}
Represents a group of input devices, including mice, keyboards. Has a
keyboard and pointer focus. Global object. Pointer events are
delivered in both screen coordinates and surface local coordinates.
\begin{tabular}{l}
\hline
Interface \texttt{cache} \\ \hline
Requests \\ \hline
\texttt{attach(buffer, x, y)} \\
Events \\ \hline
\texttt{motion(x, y, sx, sy)} \\
\texttt{button(button, state, x, y, sx, sy)} \\
\texttt{key(key, state)} \\
\texttt{pointer\_focus(surface)} \\
\texttt{keyboard\_focus(surface, keys)} \\ \hline
\end{tabular}
Talk about:
\begin{itemize}
\item keyboard map, change events
\item xkb on wayland
\item multi pointer wayland
\end{itemize}
A surface can change the pointer image when the surface is the pointer
focus of the input device. Wayland doesn't automatically change the
pointer image when a pointer enters a surface, but expects the
application to set the cursor it wants in response the the pointer
focus and motion events. The rationale is that a client has to manage
changing pointer images for UI elements within the surface in response
to motion events anyway, so we'll make that the only mechanism for
setting changing the pointer image. If the server receives a request
to set the pointer image after the surface loses pointer focus, the
request is ignored. To the client this will look like it successfully
set the pointer image.
The compositor will revert the pointer image back to a default image
when no surface has the pointer focus for that device. Clients can
revert the pointer image back to the default image by setting a NULL
image.
What if the pointer moves from one window which has set a special
pointer image to a surface that doesn't set an image in response to
the motion event? The new surface will be stuck with the special
pointer image. We can't just revert the pointer image on leaving a
surface, since if we immediately enter a surface that sets a different
image, the image will flicker. Broken app, I suppose.
\subsection{Output}
A output is a global object, advertised at connect time or as they
come and go.
\begin{tabular}{l}
\hline
Interface \texttt{output} \\ \hline
Requests \\ \hline
no requests \\ \hline
Events \\ \hline
\texttt{geometry(width, height)} \\ \hline
\end{tabular}
\begin{itemize}
\item laid out in a big (compositor) coordinate system
\item basically xrandr over wayland
\item geometry needs position in compositor coordinate system\
\item events to advertise available modes, requests to move and change
modes
\end{itemize}
\subsection{Shared object cache}
Cache for sharing glyphs, icons, cursors across clients. Lets clients
share identical objects. The cache is a global object, advertised at
connect time.
\begin{tabular}{l}
\hline
Interface \texttt{cache} \\ \hline
Requests \\ \hline
\texttt{upload(key, visual, bo, stride, width, height)} \\ \hline
Events \\ \hline
\texttt{item(key, bo, x, y, stride)} \\
\texttt{retire(bo)} \\ \hline
\end{tabular}
\begin{itemize}
\item Upload by passing a visual, bo, stride, width, height to the
cache.
\item Upload returns a bo name, stride, and x, y location of object in
the buffer. Clients take a reference on the atlas bo.
\item Shared objects are refcounted, freed by client (when purging
glyphs from the local cache) or when a client exits.
\item Server can't delete individual items from an atlas, but it can
throw out an entire atlas bo if it becomes too sparse. The server
sends out an \texttt{retire} event when this happens, and clients
must throw away any objects from that bo and reupload. Between the
server dropping the atlas and the client receiving the retire event,
clients can still legally use the old atlas since they have a ref on
the bo.
\item cairo needs to hook into the glyph cache, and maybe also a way
to create a read-only surface based on an object form the cache
(icons).
\texttt{cairo\_wayland\_create\_cached\_surface(surface-data)}.
\end{itemize}
\subsection{Drag and Drop}
Multi-device aware. Orthogonal to rest of wayland, as it is its own
toplevel object. Since the compositor determines the drag target, it
works with transformed surfaces (dragging to a scaled down window in
expose mode, for example).
Issues:
\begin{itemize}
\item we can set the cursor image to the current cursor + dragged
object, which will last as long as the drag, but maybe an request to
attach an image to the cursor will be more convenient?
\item Should drag.send() destroy the object? There's nothing to do
after the data has been transferred.
\item How do we marshall several mime-types? We could make the drag
setup a multi-step operation: dnd.create, drag.offer(mime-type1),
drag.offer(mime-type2), drag.activate(). The drag object could send
multiple offer events on each motion event. Or we could just
implement an array type, but that's a pain to work with.
\item Middle-click drag to pop up menu? Ctrl/Shift/Alt drag?
\item Send a file descriptor over the protocol to let initiator and
source exchange data out of band?
\item Action? Specify action when creating the drag object? Ask
action?
\end{itemize}
New objects, requests and events:
\begin{itemize}
\item New toplevel dnd global. One method, creates a drag object:
\texttt{dnd.start(new object id, surface, input device, mime
types)}. Starts drag for the device, if it's grabbed by the
surface. drag ends when button is released. Caller is responsible
for destroying the drag object.
\item Drag object methods:
\texttt{drag.destroy(id)}, destroy drag object.
\texttt{drag.send(id, data)}, send drag data.
\texttt{drag.accept(id, mime type)}, accept drag offer, called by
target surface.
\item Drag object events:
\texttt{drag.offer(id, mime-types)}, sent to potential destination
surfaces to offer drag data. If the device leaves the window or the
originator cancels the drag, this event is sent with mime-types =
NULL.
\texttt{drag.target(id, mime-type)}, sent to drag originator when a
target surface has accepted the offer. if a previous target goes
away, this event is sent with mime-type = NULL.
\texttt{drag.data(id, data)}, sent to target, contains dragged data.
ends transaction on the target side.
\end{itemize}
Sequence of events:
\begin{itemize}
\item The initiator surface receives a click (which grabs the input
device to that surface) and then enough motion to decide that a drag
is starting. Wayland has no subwindows, so it's entirely up to the
application to decide whether or not a draggable object within the
surface was clicked.
\item The initiator creates a drag object by calling the
\texttt{create\_drag} method on the dnd global object. As for any
client created object, the client allocates the id. The
\texttt{create\_drag} method also takes the originating surface, the
device that's dragging and the mime-types supported. If the surface
has indeed grabbed the device passed in, the server will create an
active drag object for the device. If the grab was released in the
meantime, the drag object will be in-active, that is, the same state
as when the grab is released. In that case, the client will receive
a button up event, which will let it know that the drag finished.
To the client it will look like the drag was immediately cancelled
by the grab ending.
The special mime-type application/x-root-target indicates that the
initiator is looking for drag events to the root window as well.
\item To indicate the object being dragged, the initiator can replace
the pointer image with an larger image representing the data being
dragged with the cursor image overlaid. The pointer image will
remain in place as long as the grab is in effect, since the
initiating surface keeps pointer focus, and no other surface
receives enter events.
\item As long as the grab is active (or until the initiator cancels
the drag by destroying the drag object), the drag object will send
\texttt{offer} events to surfaces it moves across. As for motion
events, these events contain the surface local coordinates of the
device as well as the list of mime-types offered. When a device
leaves a surface, it will send an \texttt{offer} event with an empty
list of mime-types to indicate that the device left the surface.
\item If a surface receives an offer event and decides that it's in an
area that can accept a drag event, it should call the
\texttt{accept} method on the drag object in the event. The surface
passes a mime-type in the request, picked from the list in the offer
event, to indicate which of the types it wants. At this point, the
surface can update the appearance of the drop target to give
feedback to the user that the drag has a valid target. If the
\texttt{offer} event moves to a different drop target (the surface
decides the offer coordinates is outside the drop target) or leaves
the surface (the offer event has an empty list of mime-types) it
should revert the appearance of the drop target to the inactive
state. A surface can also decide to retract its drop target (if the
drop target disappears or moves, for example), by calling the accept
method with a NULL mime-type.
\item When a target surface sends an \texttt{accept} request, the drag
object will send a \texttt{target} event to the initiator surface.
This tells the initiator that the drag currently has a potential
target and which of the offered mime-types the target wants. The
initiator can change the pointer image or drag source appearance to
reflect this new state. If the target surface retracts its drop
target of if the surface disappears, a \texttt{target} event with a
NULL mime-type will be sent.
If the initiator listed application/x-root-target as a valid
mime-type, dragging into the root window will make the drag object
send a \texttt{target} event with the application/x-root-target
mime-type.
\item When the grab is released (indicated by the button release
event), if the drag has an active target, the initiator calls the
\texttt{send} method on the drag object to send the data to be
transferred by the drag operation, in the format requested by the
target. The initiator can then destroy the drag object by calling
the \texttt{destroy} method.
\item The drop target receives a \texttt{data} event from the drag
object with the requested data.
\end{itemize}
MIME is defined in RFC's 2045-2049. A registry of MIME types is
maintained by the Internet Assigned Numbers Authority (IANA).
ftp://ftp.isi.edu/in-notes/iana/assignments/media-types/
\section{Types of compositors}
\subsection{System Compositor}
\begin{itemize}
\item ties in with graphical boot
\item hosts different types of session compositors
\item lets us switch between multiple sessions (fast user switching,
secure/personal desktop switching)
\item multiseat
\item linux implementation using libudev, egl, kms, evdev, cairo
\item for fullscreen clients, the system compositor can reprogram the
video scanout address to source from the client provided buffer.
\end{itemize}
\subsection{Session Compositor}
\begin{itemize}
\item nested under the system compositor. nesting is feasible because
protocol is async, roundtrip would break nesting
\item gnome-shell
\item moblin
\item compiz?
\item kde compositor?
\item text mode using vte
\item rdp session
\item fullscreen X session under wayland
\item can run without system compositor, on the hw where it makes
sense
\item root window less X server, bridging X windows into a wayland
session compositor
\end{itemize}
\subsection{Embbedding Compositor}
X11 lets clients embed windows from other clients, or lets client copy
pixmap contents rendered by another client into their window. This is
often used for applets in a panel, browser plugins and similar.
Wayland doesn't directly allow this, but clients can communicate GEM
buffer names out-of-band, for example, using d-bus or as command line
arguments when the panel launches the applet. Another option is to
use a nested wayland instance. For this, the wayland server will have
to be a library that the host application links to. The host
application will then pass the wayland server socket name to the
embedded application, and will need to implement the wayland
compositor interface. The host application composites the client
surfaces as part of it's window, that is, in the web page or in the
panel. The benefit of nesting the wayland server is that it provides
the requests the embedded client needs to inform the host about buffer
updates and a mechanism for forwarding input events from the host
application.
\begin{itemize}
\item firefox embedding flash by being a special purpose compositor to
the plugin
\end{itemize}
\section{Implementation}
what's currently implemented
\subsection{Wayland Server Library}
\texttt{libwayland-server.so}
\begin{itemize}
\item implements protocol side of a compositor
\item minimal, doesn't include any rendering or input device handling
\item helpers for running on egl and evdev, and for nested wayland
\end{itemize}
\subsection{Wayland Client Library}
\texttt{libwayland.so}
\begin{itemize}
\item minimal, designed to support integration with real toolkits such as
Qt, GTK+ or Clutter.
\item doesn't cache state, but lets the toolkits cache server state in
native objects (GObject or QObject or whatever).
\end{itemize}
\subsection{Wayland System Compositor}
\begin{itemize}
\item implementation of the system compositor
\item uses libudev, eagle (egl), evdev and drm
\item integrates with ConsoleKit, can create new sessions
\item allows multi seat setups
\item configurable through udev rules and maybe /etc/wayland.d type thing
\end{itemize}
\subsection{X Server Session}
\begin{itemize}
\item xserver module and driver support
\item uses wayland client library
\item same X.org server as we normally run, the front buffer is a wayland
surface but all accel code, 3d and extensions are there
\item when full screen the session compositor will scan out from the X
server wayland surface, at which point X is running pretty much as it
does natively.
\end{itemize}
\end{document}

4
wayland/.gitignore vendored
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scanner
wayland-client-protocol.h
wayland-protocol.c
wayland-server-protocol.h

52
wayland/Makefile.am
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lib_LTLIBRARIES = libwayland-server.la libwayland-client.la
noinst_LTLIBRARIES = libwayland-util.la
include_HEADERS = \
wayland-util.h \
wayland-server-protocol.h \
wayland-server.h \
wayland-client-protocol.h \
wayland-client.h \
wayland-egl.h
libwayland_util_la_SOURCES = \
connection.c \
connection.h \
wayland-util.c \
wayland-util.h \
wayland-hash.c
libwayland_server_la_LIBADD = $(FFI_LIBS) libwayland-util.la
libwayland_server_la_SOURCES = \
wayland-protocol.c \
wayland-server.c \
event-loop.c
libwayland_client_la_LIBADD = $(FFI_LIBS) libwayland-util.la
libwayland_client_la_SOURCES = \
wayland-protocol.c \
wayland-client.c
pkgconfigdir = $(libdir)/pkgconfig
pkgconfig_DATA = wayland-client.pc wayland-server.pc
AM_CPPFLAGS = $(FFI_CFLAGS)
AM_CFLAGS = $(GCC_CFLAGS)
include $(top_srcdir)/wayland/scanner.mk
noinst_PROGRAMS = scanner
scanner_SOURCES = \
scanner.c
scanner_LDADD = $(EXPAT_LIBS) libwayland-util.la
$(BUILT_SOURCES) : scanner
BUILT_SOURCES = \
wayland-server-protocol.h \
wayland-client-protocol.h \
wayland-protocol.c
CLEANFILES = $(BUILT_SOURCES)

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wayland/connection.c
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/*
* Copyright © 2008 Kristian Høgsberg
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
* the above copyright notice appear in all copies and that both that copyright
* notice and this permission notice appear in supporting documentation, and
* that the name of the copyright holders not be used in advertising or
* publicity pertaining to distribution of the software without specific,
* written prior permission. The copyright holders make no representations
* about the suitability of this software for any purpose. It is provided "as
* is" without express or implied warranty.
*
* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
* EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
* OF THIS SOFTWARE.
*/
#include <stdlib.h>
#include <stdint.h>
#include <string.h>
#include <stdio.h>
#include <errno.h>
#include <sys/uio.h>
#include <ffi.h>
#include <assert.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/socket.h>
#include "wayland-util.h"
#include "connection.h"
#define ARRAY_LENGTH(a) (sizeof (a) / sizeof (a)[0])
struct wl_buffer {
char data[4096];
int head, tail;
};
#define MASK(i) ((i) & 4095)
struct wl_closure {
int count;
const struct wl_message *message;
ffi_type *types[20];
ffi_cif cif;
void *args[20];
uint32_t buffer[64];
uint32_t *start;
};
struct wl_connection {
struct wl_buffer in, out;
struct wl_buffer fds_in, fds_out;
int fd;
void *data;
wl_connection_update_func_t update;
struct wl_closure receive_closure, send_closure;
};
union wl_value {
uint32_t uint32;
char *string;
struct wl_object *object;
uint32_t new_id;
struct wl_array *array;
};
static void
wl_buffer_put(struct wl_buffer *b, const void *data, size_t count)
{
int head, size;
head = MASK(b->head);
if (head + count <= sizeof b->data) {
memcpy(b->data + head, data, count);
} else {
size = sizeof b->data - head;
memcpy(b->data + head, data, size);
memcpy(b->data, (const char *) data + size, count - size);
}
b->head += count;
}
static void
wl_buffer_put_iov(struct wl_buffer *b, struct iovec *iov, int *count)
{
int head, tail;
head = MASK(b->head);
tail = MASK(b->tail);
if (head < tail) {
iov[0].iov_base = b->data + head;
iov[0].iov_len = tail - head;
*count = 1;
} else if (tail == 0) {
iov[0].iov_base = b->data + head;
iov[0].iov_len = sizeof b->data - head;
*count = 1;
} else {
iov[0].iov_base = b->data + head;
iov[0].iov_len = sizeof b->data - head;
iov[1].iov_base = b->data;
iov[1].iov_len = tail;
*count = 2;
}
}
static void
wl_buffer_get_iov(struct wl_buffer *b, struct iovec *iov, int *count)
{
int head, tail;
head = MASK(b->head);
tail = MASK(b->tail);
if (tail < head) {
iov[0].iov_base = b->data + tail;
iov[0].iov_len = head - tail;
*count = 1;
} else if (head == 0) {
iov[0].iov_base = b->data + tail;
iov[0].iov_len = sizeof b->data - tail;
*count = 1;
} else {
iov[0].iov_base = b->data + tail;
iov[0].iov_len = sizeof b->data - tail;
iov[1].iov_base = b->data;
iov[1].iov_len = head;
*count = 2;
}
}
static void
wl_buffer_copy(struct wl_buffer *b, void *data, size_t count)
{
int tail, size;
tail = MASK(b->tail);
if (tail + count <= sizeof b->data) {
memcpy(data, b->data + tail, count);
} else {
size = sizeof b->data - tail;
memcpy(data, b->data + tail, size);
memcpy((char *) data + size, b->data, count - size);
}
}
struct wl_connection *
wl_connection_create(int fd,
wl_connection_update_func_t update,
void *data)
{
struct wl_connection *connection;
connection = malloc(sizeof *connection);
memset(connection, 0, sizeof *connection);
connection->fd = fd;
connection->update = update;
connection->data = data;
connection->update(connection,
WL_CONNECTION_READABLE,
connection->data);
return connection;
}
void
wl_connection_destroy(struct wl_connection *connection)
{
close(connection->fd);
free(connection);
}
void
wl_connection_copy(struct wl_connection *connection, void *data, size_t size)
{
wl_buffer_copy(&connection->in, data, size);
}
void
wl_connection_consume(struct wl_connection *connection, size_t size)
{
connection->in.tail += size;
}
static void
build_cmsg(struct wl_buffer *buffer, char *data, int *clen)
{
struct cmsghdr *cmsg;
size_t size;
size = buffer->head - buffer->tail;
if (size > 0) {
cmsg = (struct cmsghdr *) data;
cmsg->cmsg_level = SOL_SOCKET;
cmsg->cmsg_type = SCM_RIGHTS;
cmsg->cmsg_len = CMSG_LEN(size);
wl_buffer_copy(buffer, CMSG_DATA(cmsg), size);
*clen = cmsg->cmsg_len;
} else {
*clen = 0;
}
}
static void
close_fds(struct wl_buffer *buffer)
{
int fds[32], i, count;
size_t size;
size = buffer->head - buffer->tail;
if (size == 0)
return;
wl_buffer_copy(buffer, fds, size);
count = size / sizeof fds[0];
for (i = 0; i < count; i++)
close(fds[i]);
buffer->tail += size;
}
static void
decode_cmsg(struct wl_buffer *buffer, struct msghdr *msg)
{
struct cmsghdr *cmsg;
size_t size;
for (cmsg = CMSG_FIRSTHDR(msg); cmsg != NULL;
cmsg = CMSG_NXTHDR(msg, cmsg)) {
if (cmsg->cmsg_level == SOL_SOCKET &&
cmsg->cmsg_type == SCM_RIGHTS) {
size = cmsg->cmsg_len - CMSG_LEN(0);
wl_buffer_put(buffer, CMSG_DATA(cmsg), size);
}
}
}
int
wl_connection_data(struct wl_connection *connection, uint32_t mask)
{
struct iovec iov[2];
struct msghdr msg;
char cmsg[128];
int len, count, clen;
if (mask & WL_CONNECTION_WRITABLE) {
wl_buffer_get_iov(&connection->out, iov, &count);
build_cmsg(&connection->fds_out, cmsg, &clen);
msg.msg_name = NULL;
msg.msg_namelen = 0;
msg.msg_iov = iov;
msg.msg_iovlen = count;
msg.msg_control = cmsg;
msg.msg_controllen = clen;
msg.msg_flags = 0;
do {
len = sendmsg(connection->fd, &msg, MSG_NOSIGNAL);
} while (len < 0 && errno == EINTR);
if (len == -1 && errno == EPIPE) {
return -1;
} else if (len < 0) {
fprintf(stderr,
"write error for connection %p, fd %d: %m\n",
connection, connection->fd);
return -1;
}
close_fds(&connection->fds_out);
connection->out.tail += len;
if (connection->out.tail == connection->out.head)
connection->update(connection,
WL_CONNECTION_READABLE,
connection->data);
}
if (mask & WL_CONNECTION_READABLE) {
wl_buffer_put_iov(&connection->in, iov, &count);
msg.msg_name = NULL;
msg.msg_namelen = 0;
msg.msg_iov = iov;
msg.msg_iovlen = count;
msg.msg_control = cmsg;
msg.msg_controllen = sizeof cmsg;
msg.msg_flags = 0;
do {
len = recvmsg(connection->fd, &msg, 0);
} while (len < 0 && errno == EINTR);
if (len < 0) {
fprintf(stderr,
"read error from connection %p: %m (%d)\n",
connection, errno);
return -1;
} else if (len == 0) {
/* FIXME: Handle this better? */
return -1;
}
decode_cmsg(&connection->fds_in, &msg);
connection->in.head += len;
}
return connection->in.head - connection->in.tail;
}
void
wl_connection_write(struct wl_connection *connection,
const void *data, size_t count)
{
wl_buffer_put(&connection->out, data, count);
if (connection->out.head - connection->out.tail == count)
connection->update(connection,
WL_CONNECTION_READABLE |
WL_CONNECTION_WRITABLE,
connection->data);
}
static int
wl_message_size_extra(const struct wl_message *message)
{
int i, extra;
for (i = 0, extra = 0; message->signature[i]; i++) {
switch (message->signature[i]) {
case 's':
case 'o':
extra += sizeof (void *);
break;
case 'a':
extra += sizeof (void *) + sizeof (struct wl_array);
break;
case 'h':
extra += sizeof (uint32_t);
break;
default:
break;
}
}
return extra;
}
struct wl_closure *
wl_connection_vmarshal(struct wl_connection *connection,
struct wl_object *sender,
uint32_t opcode, va_list ap,
const struct wl_message *message)
{
struct wl_closure *closure = &connection->send_closure;
struct wl_object **objectp, *object;
uint32_t length, *p, *start, size;
int dup_fd;
struct wl_array **arrayp, *array;
const char **sp, *s;
char *extra;
int i, count, fd, extra_size, *fd_ptr;
extra_size = wl_message_size_extra(message);
count = strlen(message->signature) + 2;
extra = (char *) closure->buffer;
start = &closure->buffer[DIV_ROUNDUP(extra_size, sizeof *p)];
p = &start[2];
for (i = 2; i < count; i++) {
switch (message->signature[i - 2]) {
case 'u':
closure->types[i] = &ffi_type_uint32;
closure->args[i] = p;
*p++ = va_arg(ap, uint32_t);
break;
case 'i':
closure->types[i] = &ffi_type_sint32;
closure->args[i] = p;
*p++ = va_arg(ap, int32_t);
break;
case 's':
closure->types[i] = &ffi_type_pointer;
closure->args[i] = extra;
sp = (const char **) extra;
extra += sizeof *sp;
s = va_arg(ap, const char *);
length = s ? strlen(s) + 1: 0;
*p++ = length;
if (length > 0)
*sp = (const char *) p;
else
*sp = NULL;
memcpy(p, s, length);
p += DIV_ROUNDUP(length, sizeof *p);
break;
case 'o':
closure->types[i] = &ffi_type_pointer;
closure->args[i] = extra;
objectp = (struct wl_object **) extra;
extra += sizeof *objectp;
object = va_arg(ap, struct wl_object *);
*objectp = object;
*p++ = object ? object->id : 0;
break;
case 'n':
closure->types[i] = &ffi_type_uint32;
closure->args[i] = p;
object = va_arg(ap, struct wl_object *);
*p++ = object->id;
break;
case 'a':
closure->types[i] = &ffi_type_pointer;
closure->args[i] = extra;
arrayp = (struct wl_array **) extra;
extra += sizeof *arrayp;
*arrayp = (struct wl_array *) extra;
extra += sizeof **arrayp;
array = va_arg(ap, struct wl_array *);
if (array == NULL || array->size == 0) {
*p++ = 0;
break;
}
*p++ = array->size;
memcpy(p, array->data, array->size);
(*arrayp)->size = array->size;
(*arrayp)->alloc = array->alloc;
(*arrayp)->data = p;
p += DIV_ROUNDUP(array->size, sizeof *p);
break;
case 'h':
closure->types[i] = &ffi_type_sint;
closure->args[i] = extra;
fd_ptr = (int *) extra;
extra += sizeof *fd_ptr;
fd = va_arg(ap, int);
dup_fd = dup(fd);
if (dup_fd < 0) {
fprintf(stderr, "dup failed: %m");
abort();
}
*fd_ptr = dup_fd;
wl_buffer_put(&connection->fds_out,
&dup_fd, sizeof dup_fd);
break;
default:
assert(0);
break;
}
}
size = (p - start) * sizeof *p;
start[0] = sender->id;
start[1] = opcode | (size << 16);
closure->start = start;
closure->message = message;
closure->count = count;
return closure;
}
struct wl_closure *
wl_connection_demarshal(struct wl_connection *connection,
uint32_t size,
struct wl_hash_table *objects,
const struct wl_message *message)
{
uint32_t *p, *next, *end, length;
int *fd;
char *extra, **s;
int i, count, extra_space;
struct wl_object **object;
struct wl_array **array;
struct wl_closure *closure = &connection->receive_closure;
count = strlen(message->signature) + 2;
if (count > ARRAY_LENGTH(closure->types)) {
printf("too many args (%d)\n", count);
assert(0);
}
extra_space = wl_message_size_extra(message);
if (sizeof closure->buffer < size + extra_space) {
printf("request too big, should malloc tmp buffer here\n");
assert(0);
}
closure->message = message;
closure->types[0] = &ffi_type_pointer;
closure->types[1] = &ffi_type_pointer;
wl_connection_copy(connection, closure->buffer, size);
p = &closure->buffer[2];
end = (uint32_t *) ((char *) (p + size));
extra = (char *) end;
for (i = 2; i < count; i++) {
if (p + 1 > end) {
printf("message too short, "
"object (%d), message %s(%s)\n",
*p, message->name, message->signature);
errno = EINVAL;
goto err;
}
switch (message->signature[i - 2]) {
case 'u':
closure->types[i] = &ffi_type_uint32;
closure->args[i] = p++;
break;
case 'i':
closure->types[i] = &ffi_type_sint32;
closure->args[i] = p++;
break;
case 's':
closure->types[i] = &ffi_type_pointer;
length = *p++;
next = p + DIV_ROUNDUP(length, sizeof *p);
if (next > end) {
printf("message too short, "
"object (%d), message %s(%s)\n",
*p, message->name, message->signature);
errno = EINVAL;
goto err;
}
s = (char **) extra;
extra += sizeof *s;
closure->args[i] = s;
if (length == 0) {
*s = NULL;
} else {
*s = (char *) p;
}
if (length > 0 && (*s)[length - 1] != '\0') {
printf("string not nul-terminated, "
"message %s(%s)\n",
message->name, message->signature);
errno = EINVAL;
goto err;
}
p = next;
break;
case 'o':
closure->types[i] = &ffi_type_pointer;
object = (struct wl_object **) extra;
extra += sizeof *object;
closure->args[i] = object;
*object = wl_hash_table_lookup(objects, *p);
if (*object == NULL && *p != 0) {
printf("unknown object (%d), message %s(%s)\n",
*p, message->name, message->signature);
errno = EINVAL;
goto err;
}
p++;
break;
case 'n':
closure->types[i] = &ffi_type_uint32;
closure->args[i] = p;
object = wl_hash_table_lookup(objects, *p);
if (object != NULL) {
printf("not a new object (%d), "
"message %s(%s)\n",
*p, message->name, message->signature);
errno = EINVAL;
goto err;
}
p++;
break;
case 'a':
closure->types[i] = &ffi_type_pointer;
length = *p++;
next = p + DIV_ROUNDUP(length, sizeof *p);
if (next > end) {
printf("message too short, "
"object (%d), message %s(%s)\n",
*p, message->name, message->signature);
errno = EINVAL;
goto err;
}
array = (struct wl_array **) extra;
extra += sizeof *array;
closure->args[i] = array;
*array = (struct wl_array *) extra;
extra += sizeof **array;
(*array)->size = length;
(*array)->alloc = 0;
(*array)->data = p;
p = next;
break;
case 'h':
closure->types[i] = &ffi_type_sint;
fd = (int *) extra;
extra += sizeof *fd;
closure->args[i] = fd;
wl_buffer_copy(&connection->fds_in, fd, sizeof *fd);
connection->fds_in.tail += sizeof *fd;
break;
default:
printf("unknown type\n");
assert(0);
break;
}
}
closure->count = i;
ffi_prep_cif(&closure->cif, FFI_DEFAULT_ABI,
closure->count, &ffi_type_uint32, closure->types);
wl_connection_consume(connection, size);
return closure;
err:
closure->count = i;
wl_closure_destroy(closure);
wl_connection_consume(connection, size);
return NULL;
}
void
wl_closure_invoke(struct wl_closure *closure,
struct wl_object *target, void (*func)(void), void *data)
{
int result;
closure->args[0] = &data;
closure->args[1] = &target;
ffi_call(&closure->cif, func, &result, closure->args);
}
void
wl_closure_send(struct wl_closure *closure, struct wl_connection *connection)
{
uint32_t size;
size = closure->start[1] >> 16;
wl_connection_write(connection, closure->start, size);
}
void
wl_closure_print(struct wl_closure *closure, struct wl_object *target)
{
union wl_value *value;
int i;
fprintf(stderr, "%s@%d.%s(",
target->interface->name, target->id,
closure->message->name);
for (i = 2; i < closure->count; i++) {
if (i > 2)
fprintf(stderr, ", ");
value = closure->args[i];
switch (closure->message->signature[i - 2]) {
case 'u':
fprintf(stderr, "%u", value->uint32);
break;
case 'i':
fprintf(stderr, "%d", value->uint32);
break;
case 's':
fprintf(stderr, "\"%s\"", value->string);
break;
case 'o':
if (value->object)
fprintf(stderr, "%s@%u",
value->object->interface->name,
value->object->id);
else
fprintf(stderr, "nil");
break;
case 'n':
fprintf(stderr, "new id %u", value->uint32);
break;
case 'a':
fprintf(stderr, "array");
break;
case 'h':
fprintf(stderr, "fd %d", value->uint32);
break;
}
}
fprintf(stderr, ")\n");
}
void
wl_closure_destroy(struct wl_closure *closure)
{
}

68
wayland/connection.h
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/*
* Copyright © 2008 Kristian Høgsberg
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
* the above copyright notice appear in all copies and that both that copyright
* notice and this permission notice appear in supporting documentation, and
* that the name of the copyright holders not be used in advertising or
* publicity pertaining to distribution of the software without specific,
* written prior permission. The copyright holders make no representations
* about the suitability of this software for any purpose. It is provided "as
* is" without express or implied warranty.
*
* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
* EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
* OF THIS SOFTWARE.
*/
#ifndef _CONNECTION_H_
#define _CONNECTION_H_
#include <stdarg.h>
#include "wayland-util.h"
struct wl_connection;
struct wl_closure;
#define WL_CONNECTION_READABLE 0x01
#define WL_CONNECTION_WRITABLE 0x02
typedef int (*wl_connection_update_func_t)(struct wl_connection *connection,
uint32_t mask, void *data);
struct wl_connection *wl_connection_create(int fd,
wl_connection_update_func_t update,
void *data);
void wl_connection_destroy(struct wl_connection *connection);
void wl_connection_copy(struct wl_connection *connection, void *data, size_t size);
void wl_connection_consume(struct wl_connection *connection, size_t size);
int wl_connection_data(struct wl_connection *connection, uint32_t mask);
void wl_connection_write(struct wl_connection *connection, const void *data, size_t count);
struct wl_closure *
wl_connection_vmarshal(struct wl_connection *connection,
struct wl_object *sender,
uint32_t opcode, va_list ap,
const struct wl_message *message);
struct wl_closure *
wl_connection_demarshal(struct wl_connection *connection,
uint32_t size,
struct wl_hash_table *objects,
const struct wl_message *message);
void
wl_closure_invoke(struct wl_closure *closure,
struct wl_object *target, void (*func)(void), void *data);
void
wl_closure_send(struct wl_closure *closure, struct wl_connection *connection);
void
wl_closure_print(struct wl_closure *closure, struct wl_object *target);
void
wl_closure_destroy(struct wl_closure *closure);
#endif

444
wayland/event-loop.c
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/*
* Copyright © 2008 Kristian Høgsberg
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
* the above copyright notice appear in all copies and that both that copyright
* notice and this permission notice appear in supporting documentation, and
* that the name of the copyright holders not be used in advertising or
* publicity pertaining to distribution of the software without specific,
* written prior permission. The copyright holders make no representations
* about the suitability of this software for any purpose. It is provided "as
* is" without express or implied warranty.
*
* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
* EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
* OF THIS SOFTWARE.
*/
#include <stddef.h>
#include <stdio.h>
#include <errno.h>
#include <signal.h>
#include <stdlib.h>
#include <string.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <sys/epoll.h>
#include <sys/signalfd.h>
#include <sys/timerfd.h>
#include <unistd.h>
#include <assert.h>
#include "wayland-server.h"
struct wl_event_loop {
int epoll_fd;
struct wl_list idle_list;
};
struct wl_event_source_interface {
void (*dispatch)(struct wl_event_source *source,
struct epoll_event *ep);
int (*remove)(struct wl_event_source *source);
};
struct wl_event_source {
struct wl_event_source_interface *interface;
struct wl_event_loop *loop;
};
struct wl_event_source_fd {
struct wl_event_source base;
int fd;
wl_event_loop_fd_func_t func;
void *data;
};
static void
wl_event_source_fd_dispatch(struct wl_event_source *source,
struct epoll_event *ep)
{
struct wl_event_source_fd *fd_source = (struct wl_event_source_fd *) source;
uint32_t mask;
mask = 0;
if (ep->events & EPOLLIN)
mask |= WL_EVENT_READABLE;
if (ep->events & EPOLLOUT)
mask |= WL_EVENT_WRITEABLE;
fd_source->func(fd_source->fd, mask, fd_source->data);
}
static int
wl_event_source_fd_remove(struct wl_event_source *source)
{
struct wl_event_source_fd *fd_source =
(struct wl_event_source_fd *) source;
struct wl_event_loop *loop = source->loop;
int fd;
fd = fd_source->fd;
free(source);
return epoll_ctl(loop->epoll_fd, EPOLL_CTL_DEL, fd, NULL);
}
struct wl_event_source_interface fd_source_interface = {
wl_event_source_fd_dispatch,
wl_event_source_fd_remove
};
WL_EXPORT struct wl_event_source *
wl_event_loop_add_fd(struct wl_event_loop *loop,
int fd, uint32_t mask,
wl_event_loop_fd_func_t func,
void *data)
{
struct wl_event_source_fd *source;
struct epoll_event ep;
source = malloc(sizeof *source);
if (source == NULL)
return NULL;
source->base.interface = &fd_source_interface;
source->base.loop = loop;
source->fd = fd;
source->func = func;
source->data = data;
memset(&ep, 0, sizeof ep);
if (mask & WL_EVENT_READABLE)
ep.events |= EPOLLIN;
if (mask & WL_EVENT_WRITEABLE)
ep.events |= EPOLLOUT;
ep.data.ptr = source;
if (epoll_ctl(loop->epoll_fd, EPOLL_CTL_ADD, fd, &ep) < 0) {
free(source);
return NULL;
}
return &source->base;
}
WL_EXPORT int
wl_event_source_fd_update(struct wl_event_source *source, uint32_t mask)
{
struct wl_event_source_fd *fd_source =
(struct wl_event_source_fd *) source;
struct wl_event_loop *loop = source->loop;
struct epoll_event ep;
memset(&ep, 0, sizeof ep);
if (mask & WL_EVENT_READABLE)
ep.events |= EPOLLIN;
if (mask & WL_EVENT_WRITEABLE)
ep.events |= EPOLLOUT;
ep.data.ptr = source;
return epoll_ctl(loop->epoll_fd,
EPOLL_CTL_MOD, fd_source->fd, &ep);
}
struct wl_event_source_timer {
struct wl_event_source base;
int fd;
wl_event_loop_timer_func_t func;
void *data;
};
static void
wl_event_source_timer_dispatch(struct wl_event_source *source,
struct epoll_event *ep)
{
struct wl_event_source_timer *timer_source =
(struct wl_event_source_timer *) source;
uint64_t expires;
read(timer_source->fd, &expires, sizeof expires);
timer_source->func(timer_source->data);
}
static int
wl_event_source_timer_remove(struct wl_event_source *source)
{
struct wl_event_source_timer *timer_source =
(struct wl_event_source_timer *) source;
struct wl_event_loop *loop = source->loop;
int fd;
fd = timer_source->fd;
free(source);
return epoll_ctl(loop->epoll_fd, EPOLL_CTL_DEL, fd, NULL);
}
struct wl_event_source_interface timer_source_interface = {
wl_event_source_timer_dispatch,
wl_event_source_timer_remove
};
WL_EXPORT struct wl_event_source *
wl_event_loop_add_timer(struct wl_event_loop *loop,
wl_event_loop_timer_func_t func,
void *data)
{
struct wl_event_source_timer *source;
struct epoll_event ep;
source = malloc(sizeof *source);
if (source == NULL)
return NULL;
source->base.interface = &timer_source_interface;
source->base.loop = loop;
source->fd = timerfd_create(CLOCK_MONOTONIC, 0);
if (source->fd < 0) {
fprintf(stderr, "could not create timerfd\n: %m");
free(source);
return NULL;
}
source->func = func;
source->data = data;
memset(&ep, 0, sizeof ep);
ep.events = EPOLLIN;
ep.data.ptr = source;
if (epoll_ctl(loop->epoll_fd, EPOLL_CTL_ADD, source->fd, &ep) < 0) {
free(source);
return NULL;
}
return &source->base;
}
WL_EXPORT int
wl_event_source_timer_update(struct wl_event_source *source, int ms_delay)
{
struct wl_event_source_timer *timer_source =
(struct wl_event_source_timer *) source;
struct itimerspec its;
its.it_interval.tv_sec = 0;
its.it_interval.tv_nsec = 0;
its.it_value.tv_sec = 0;
its.it_value.tv_nsec = ms_delay * 1000 * 1000;
if (timerfd_settime(timer_source->fd, 0, &its, NULL) < 0) {
fprintf(stderr, "could not set timerfd\n: %m");
return -1;
}
return 0;
}
struct wl_event_source_signal {
struct wl_event_source base;
int fd;
int signal_number;
wl_event_loop_signal_func_t func;
void *data;
};
static void
wl_event_source_signal_dispatch(struct wl_event_source *source,
struct epoll_event *ep)
{
struct wl_event_source_signal *signal_source =
(struct wl_event_source_signal *) source;
struct signalfd_siginfo signal_info;
read(signal_source->fd, &signal_info, sizeof signal_info);
signal_source->func(signal_source->signal_number, signal_source->data);
}
static int
wl_event_source_signal_remove(struct wl_event_source *source)
{
struct wl_event_source_signal *signal_source =
(struct wl_event_source_signal *) source;
struct wl_event_loop *loop = source->loop;
int fd;
fd = signal_source->fd;
free(source);
return epoll_ctl(loop->epoll_fd, EPOLL_CTL_DEL, fd, NULL);
}
struct wl_event_source_interface signal_source_interface = {
wl_event_source_signal_dispatch,
wl_event_source_signal_remove
};
WL_EXPORT struct wl_event_source *
wl_event_loop_add_signal(struct wl_event_loop *loop,
int signal_number,
wl_event_loop_signal_func_t func,
void *data)
{
struct wl_event_source_signal *source;
struct epoll_event ep;
sigset_t mask;
source = malloc(sizeof *source);
if (source == NULL)
return NULL;
source->base.interface = &signal_source_interface;
source->base.loop = loop;
sigemptyset(&mask);
sigaddset(&mask, signal_number);
source->fd = signalfd(-1, &mask, 0);
if (source->fd < 0) {
fprintf(stderr, "could not create fd to watch signal\n: %m");
free(source);
return NULL;
}
sigprocmask(SIG_BLOCK, &mask, NULL);
source->func = func;
source->data = data;
memset(&ep, 0, sizeof ep);
ep.events = EPOLLIN;
ep.data.ptr = source;
if (epoll_ctl(loop->epoll_fd, EPOLL_CTL_ADD, source->fd, &ep) < 0) {
free(source);
return NULL;
}
return &source->base;
}
struct wl_event_source_idle {
struct wl_event_source base;
struct wl_list link;
wl_event_loop_idle_func_t func;
void *data;
};
static void
wl_event_source_idle_dispatch(struct wl_event_source *source,
struct epoll_event *ep)
{
assert(0);
}
static int
wl_event_source_idle_remove(struct wl_event_source *source)
{
struct wl_event_source_idle *idle_source =
(struct wl_event_source_idle *) source;
wl_list_remove(&idle_source->link);
free(source);
return 0;
}
struct wl_event_source_interface idle_source_interface = {
wl_event_source_idle_dispatch,
wl_event_source_idle_remove
};
WL_EXPORT struct wl_event_source *
wl_event_loop_add_idle(struct wl_event_loop *loop,
wl_event_loop_idle_func_t func,
void *data)
{
struct wl_event_source_idle *source;
source = malloc(sizeof *source);
if (source == NULL)
return NULL;
source->base.interface = &idle_source_interface;
source->base.loop = loop;
source->func = func;
source->data = data;
wl_list_insert(loop->idle_list.prev, &source->link);
return &source->base;
}
WL_EXPORT int
wl_event_source_remove(struct wl_event_source *source)
{
source->interface->remove(source);
return 0;
}
WL_EXPORT struct wl_event_loop *
wl_event_loop_create(void)
{
struct wl_event_loop *loop;
loop = malloc(sizeof *loop);
if (loop == NULL)
return NULL;
loop->epoll_fd = epoll_create(16);
if (loop->epoll_fd < 0) {
free(loop);
return NULL;
}
wl_list_init(&loop->idle_list);
return loop;
}
WL_EXPORT void
wl_event_loop_destroy(struct wl_event_loop *loop)
{
close(loop->epoll_fd);
free(loop);
}
WL_EXPORT int
wl_event_loop_dispatch(struct wl_event_loop *loop, int timeout)
{
struct epoll_event ep[32];
struct wl_event_source *source;
struct wl_event_source_idle *idle;
int i, count;
count = epoll_wait(loop->epoll_fd, ep, ARRAY_LENGTH(ep), timeout);
if (count < 0)
return -1;
for (i = 0; i < count; i++) {
source = ep[i].data.ptr;
source->interface->dispatch(source, &ep[i]);
}
while (!wl_list_empty(&loop->idle_list)) {
idle = container_of(loop->idle_list.next,
struct wl_event_source_idle, link);
wl_list_remove(&idle->link);
idle->func(idle->data);
free(idle);
}
return 0;
}
WL_EXPORT int
wl_event_loop_get_fd(struct wl_event_loop *loop)
{
return loop->epoll_fd;
}

760
wayland/scanner.c
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/*
* Copyright © 2010 Intel Corporation
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <ctype.h>
#include <expat.h>
#include "wayland-util.h"
static const char copyright[] =
"/*\n"
" * Copyright © 2010 Kristian Høgsberg\n"
" *\n"
" * Permission to use, copy, modify, distribute, and sell this software and its\n"
" * documentation for any purpose is hereby granted without fee, provided that\n"
" * the above copyright notice appear in all copies and that both that copyright\n"
" * notice and this permission notice appear in supporting documentation, and\n"
" * that the name of the copyright holders not be used in advertising or\n"
" * publicity pertaining to distribution of the software without specific,\n"
" * written prior permission. The copyright holders make no representations\n"
" * about the suitability of this software for any purpose. It is provided \"as\n"
" * is\" without express or implied warranty.\n"
" *\n"
" * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,\n"
" * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO\n"
" * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR\n"
" * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,\n"
" * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER\n"
" * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE\n"
" * OF THIS SOFTWARE.\n"
" */\n";
static int
usage(int ret)
{
fprintf(stderr, "usage: ./scanner [header|code]\n");
exit(ret);
}
#define XML_BUFFER_SIZE 4096
struct protocol {
char *name;
char *uppercase_name;
struct wl_list interface_list;
};
struct interface {
char *name;
char *uppercase_name;
int version;
struct wl_list request_list;
struct wl_list event_list;
struct wl_list enumeration_list;
struct wl_list link;
};
struct message {
char *name;
char *uppercase_name;
struct wl_list arg_list;
struct wl_list link;
int destructor;
};
enum arg_type {
NEW_ID,
INT,
UNSIGNED,
STRING,
OBJECT,
ARRAY,
FD
};
struct arg {
char *name;
enum arg_type type;
char *interface_name;
struct wl_list link;
};
struct enumeration {
char *name;
char *uppercase_name;
struct wl_list entry_list;
struct wl_list link;
};
struct entry {
char *name;
char *uppercase_name;
char *value;
struct wl_list link;
};
struct parse_context {
struct protocol *protocol;
struct interface *interface;
struct message *message;
struct enumeration *enumeration;
};
static char *
uppercase_dup(const char *src)
{
char *u;
int i;
u = strdup(src);
for (i = 0; u[i]; i++)
u[i] = toupper(u[i]);
u[i] = '\0';
return u;
}
static void
start_element(void *data, const char *element_name, const char **atts)
{
struct parse_context *ctx = data;
struct interface *interface;
struct message *message;
struct arg *arg;
struct enumeration *enumeration;
struct entry *entry;
const char *name, *type, *interface_name, *value;
int i, version;
name = NULL;
type = NULL;
version = 0;
interface_name = NULL;
value = NULL;
for (i = 0; atts[i]; i += 2) {
if (strcmp(atts[i], "name") == 0)
name = atts[i + 1];
if (strcmp(atts[i], "version") == 0)
version = atoi(atts[i + 1]);
if (strcmp(atts[i], "type") == 0)
type = atts[i + 1];
if (strcmp(atts[i], "value") == 0)
value = atts[i + 1];
if (strcmp(atts[i], "interface") == 0)
interface_name = atts[i + 1];
}
if (strcmp(element_name, "protocol") == 0) {
if (name == NULL) {
fprintf(stderr, "no protocol name given\n");
exit(EXIT_FAILURE);
}
ctx->protocol->name = strdup(name);
ctx->protocol->uppercase_name = uppercase_dup(name);
} else if (strcmp(element_name, "interface") == 0) {
if (name == NULL) {
fprintf(stderr, "no interface name given\n");
exit(EXIT_FAILURE);
}
if (version == 0) {
fprintf(stderr, "no interface version given\n");
exit(EXIT_FAILURE);
}
interface = malloc(sizeof *interface);
interface->name = strdup(name);
interface->uppercase_name = uppercase_dup(name);
interface->version = version;
wl_list_init(&interface->request_list);
wl_list_init(&interface->event_list);
wl_list_init(&interface->enumeration_list);
wl_list_insert(ctx->protocol->interface_list.prev,
&interface->link);
ctx->interface = interface;
} else if (strcmp(element_name, "request") == 0 ||
strcmp(element_name, "event") == 0) {
if (name == NULL) {
fprintf(stderr, "no request name given\n");
exit(EXIT_FAILURE);
}
message = malloc(sizeof *message);
message->name = strdup(name);
message->uppercase_name = uppercase_dup(name);
wl_list_init(&message->arg_list);
if (strcmp(element_name, "request") == 0)
wl_list_insert(ctx->interface->request_list.prev,
&message->link);
else
wl_list_insert(ctx->interface->event_list.prev,
&message->link);
if (type != NULL && strcmp(type, "destructor") == 0)
message->destructor = 1;
else
message->destructor = 0;
ctx->message = message;
} else if (strcmp(element_name, "arg") == 0) {
arg = malloc(sizeof *arg);
arg->name = strdup(name);
if (strcmp(type, "int") == 0)
arg->type = INT;
else if (strcmp(type, "uint") == 0)
arg->type = UNSIGNED;
else if (strcmp(type, "string") == 0)
arg->type = STRING;
else if (strcmp(type, "array") == 0)
arg->type = ARRAY;
else if (strcmp(type, "fd") == 0)
arg->type = FD;
else if (strcmp(type, "new_id") == 0) {
if (interface_name == NULL) {
fprintf(stderr, "no interface name given\n");
exit(EXIT_FAILURE);
}
arg->type = NEW_ID;
arg->interface_name = strdup(interface_name);
} else if (strcmp(type, "object") == 0) {
if (interface_name == NULL) {
fprintf(stderr, "no interface name given\n");
exit(EXIT_FAILURE);
}
arg->type = OBJECT;
arg->interface_name = strdup(interface_name);
} else {
fprintf(stderr, "unknown type: %s\n", type);
exit(EXIT_FAILURE);
}
wl_list_insert(ctx->message->arg_list.prev, &arg->link);
} else if (strcmp(element_name, "enum") == 0) {
if (name == NULL) {
fprintf(stderr, "no enum name given\n");
exit(EXIT_FAILURE);
}
enumeration = malloc(sizeof *enumeration);
enumeration->name = strdup(name);
enumeration->uppercase_name = uppercase_dup(name);
wl_list_init(&enumeration->entry_list);
wl_list_insert(ctx->interface->enumeration_list.prev,
&enumeration->link);
ctx->enumeration = enumeration;
} else if (strcmp(element_name, "entry") == 0) {
entry = malloc(sizeof *entry);
entry->name = strdup(name);
entry->uppercase_name = uppercase_dup(name);
entry->value = strdup(value);
wl_list_insert(ctx->enumeration->entry_list.prev,
&entry->link);
}
}
static void
emit_opcodes(struct wl_list *message_list, struct interface *interface)
{
struct message *m;
int opcode;
if (wl_list_empty(message_list))
return;
opcode = 0;
wl_list_for_each(m, message_list, link)
printf("#define WL_%s_%s\t%d\n",
interface->uppercase_name, m->uppercase_name, opcode++);
printf("\n");
}
static void
emit_type(struct arg *a)
{
switch (a->type) {
default:
case INT:
case FD:
printf("int ");
break;
case NEW_ID:
case UNSIGNED:
printf("uint32_t ");
break;
case STRING:
printf("const char *");
break;
case OBJECT:
printf("struct wl_%s *", a->interface_name);
break;
case ARRAY:
printf("struct wl_array *");
break;
}
}
static void
emit_stubs(struct wl_list *message_list, struct interface *interface)
{
struct message *m;
struct arg *a, *ret;
int has_destructor, has_destroy;
/* We provide a hand written constructor for the display object */
if (strcmp(interface->name, "display") != 0)
printf("static inline struct wl_%s *\n"
"wl_%s_create(struct wl_display *display, uint32_t id)\n"
"{\n"
"\treturn (struct wl_%s *)\n"
"\t\twl_proxy_create_for_id(display, &wl_%s_interface, id);\n"
"}\n\n",
interface->name,
interface->name,
interface->name,
interface->name);
printf("static inline void\n"
"wl_%s_set_user_data(struct wl_%s *%s, void *user_data)\n"
"{\n"
"\twl_proxy_set_user_data((struct wl_proxy *) %s, user_data);\n"
"}\n\n",
interface->name, interface->name, interface->name,
interface->name);
printf("static inline void *\n"
"wl_%s_get_user_data(struct wl_%s *%s)\n"
"{\n"
"\treturn wl_proxy_get_user_data((struct wl_proxy *) %s);\n"
"}\n\n",
interface->name, interface->name, interface->name,
interface->name);
has_destructor = 0;
has_destroy = 0;
wl_list_for_each(m, message_list, link) {
if (m->destructor)
has_destructor = 1;
if (strcmp(m->name, "destroy)") == 0)
has_destroy = 1;
}
if (!has_destructor && has_destroy) {
fprintf(stderr,
"interface %s has method named destroy but"
"no destructor", interface->name);
exit(EXIT_FAILURE);
}
/* And we have a hand-written display destructor */
if (!has_destructor && strcmp(interface->name, "display") != 0)
printf("static inline void\n"
"wl_%s_destroy(struct wl_%s *%s)\n"
"{\n"
"\twl_proxy_destroy("
"(struct wl_proxy *) %s);\n"
"}\n\n",
interface->name, interface->name, interface->name,
interface->name);
if (wl_list_empty(message_list))
return;
wl_list_for_each(m, message_list, link) {
ret = NULL;
wl_list_for_each(a, &m->arg_list, link) {
if (a->type == NEW_ID)
ret = a;
}
if (ret)
printf("static inline struct wl_%s *\n",
ret->interface_name);
else
printf("static inline void\n");
printf("wl_%s_%s(struct wl_%s *%s",
interface->name, m->name,
interface->name, interface->name);
wl_list_for_each(a, &m->arg_list, link) {
if (a->type == NEW_ID)
continue;
printf(", ");
emit_type(a);
printf("%s", a->name);
}
printf(")\n"
"{\n");
if (ret)
printf("\tstruct wl_proxy *%s;\n\n"
"\t%s = wl_proxy_create("
"(struct wl_proxy *) %s,\n"
"\t\t\t &wl_%s_interface);\n"
"\tif (!%s)\n"
"\t\treturn NULL;\n\n",
ret->name,
ret->name,
interface->name, ret->interface_name,
ret->name);
printf("\twl_proxy_marshal((struct wl_proxy *) %s,\n"
"\t\t\t WL_%s_%s",
interface->name,
interface->uppercase_name,
m->uppercase_name);
wl_list_for_each(a, &m->arg_list, link) {
printf(", ");
printf("%s", a->name);
}
printf(");\n");
if (m->destructor)
printf("\n\twl_proxy_destroy("
"(struct wl_proxy *) %s);\n",
interface->name);
if (ret)
printf("\n\treturn (struct wl_%s *) %s;\n",
ret->interface_name, ret->name);
printf("}\n\n");
}
}
static const char *indent(int n)
{
const char *whitespace[] = {
"\t\t\t\t\t\t\t\t\t\t\t\t",
"\t\t\t\t\t\t\t\t\t\t\t\t ",
"\t\t\t\t\t\t\t\t\t\t\t\t ",
"\t\t\t\t\t\t\t\t\t\t\t\t ",
"\t\t\t\t\t\t\t\t\t\t\t\t ",
"\t\t\t\t\t\t\t\t\t\t\t\t ",
"\t\t\t\t\t\t\t\t\t\t\t\t ",
"\t\t\t\t\t\t\t\t\t\t\t\t "
};
return whitespace[n % 8] + 12 - n / 8;
}
static void
emit_enumerations(struct interface *interface)
{
struct enumeration *e;
struct entry *entry;
wl_list_for_each(e, &interface->enumeration_list, link) {
printf("#ifndef WL_%s_%s_ENUM\n",
interface->uppercase_name, e->uppercase_name);
printf("#define WL_%s_%s_ENUM\n",
interface->uppercase_name, e->uppercase_name);
printf("enum wl_%s_%s {\n", interface->name, e->name);
wl_list_for_each(entry, &e->entry_list, link)
printf("\tWL_%s_%s_%s = %s,\n",
interface->uppercase_name,
e->uppercase_name,
entry->uppercase_name, entry->value);
printf("};\n");
printf("#endif /* WL_%s_%s_ENUM */\n\n",
interface->uppercase_name, e->uppercase_name);
}
}
static void
emit_structs(struct wl_list *message_list, struct interface *interface)
{
struct message *m;
struct arg *a;
int is_interface, n;
if (wl_list_empty(message_list))
return;
is_interface = message_list == &interface->request_list;
printf("struct wl_%s_%s {\n", interface->name,
is_interface ? "interface" : "listener");
wl_list_for_each(m, message_list, link) {
printf("\tvoid (*%s)(", m->name);
n = strlen(m->name) + 17;
if (is_interface) {
printf("struct wl_client *client,\n"
"%sstruct wl_%s *%s",
indent(n),
interface->name, interface->name);
} else {
printf("void *data,\n"),
printf("%sstruct wl_%s *%s",
indent(n), interface->name, interface->name);
}
wl_list_for_each(a, &m->arg_list, link) {
printf(",\n%s", indent(n));
emit_type(a);
printf("%s", a->name);
}
printf(");\n");
}
printf("};\n\n");
if (!is_interface) {
printf("static inline int\n"
"wl_%s_add_listener(struct wl_%s *%s,\n"
"%sconst struct wl_%s_listener *listener, void *data)\n"
"{\n"
"\treturn wl_proxy_add_listener((struct wl_proxy *) %s,\n"
"%s(void (**)(void)) listener, data);\n"
"}\n\n",
interface->name, interface->name, interface->name,
indent(17 + strlen(interface->name)),
interface->name,
interface->name,
indent(37));
}
}
static const char client_prototypes[] =
"struct wl_proxy;\n\n"
"extern void\n"
"wl_proxy_marshal(struct wl_proxy *p, uint32_t opcode, ...);\n"
"extern struct wl_proxy *\n"
"wl_proxy_create(struct wl_proxy *factory,\n"
"\t\tconst struct wl_interface *interface);\n"
"extern struct wl_proxy *\n"
"wl_proxy_create_for_id(struct wl_display *display,\n"
"\t\t const struct wl_interface *interface, uint32_t id);\n"
"extern void\n"
"wl_proxy_destroy(struct wl_proxy *proxy);\n\n"
"extern int\n"
"wl_proxy_add_listener(struct wl_proxy *proxy,\n"
"\t\t void (**implementation)(void), void *data);\n\n"
"extern void\n"
"wl_proxy_set_user_data(struct wl_proxy *proxy, void *user_data);\n\n"
"extern void *\n"
"wl_proxy_get_user_data(struct wl_proxy *proxy);\n\n";
static void
emit_header(struct protocol *protocol, int server)
{
struct interface *i;
const char *s = server ? "SERVER" : "CLIENT";
printf("%s\n\n"
"#ifndef %s_%s_PROTOCOL_H\n"
"#define %s_%s_PROTOCOL_H\n"
"\n"
"#ifdef __cplusplus\n"
"extern \"C\" {\n"
"#endif\n"
"\n"
"#include <stdint.h>\n"
"#include <stddef.h>\n"
"#include \"wayland-util.h\"\n\n"
"struct wl_client;\n\n",
copyright,
protocol->uppercase_name, s,
protocol->uppercase_name, s);
wl_list_for_each(i, &protocol->interface_list, link)
printf("struct wl_%s;\n", i->name);
printf("\n");
if (!server)
printf(client_prototypes);
wl_list_for_each(i, &protocol->interface_list, link) {
printf("extern const struct wl_interface "
"wl_%s_interface;\n",
i->name);
}
printf("\n");
wl_list_for_each(i, &protocol->interface_list, link) {
emit_enumerations(i);
if (server) {
emit_structs(&i->request_list, i);
emit_opcodes(&i->event_list, i);
} else {
emit_structs(&i->event_list, i);
emit_opcodes(&i->request_list, i);
emit_stubs(&i->request_list, i);
}
}
printf("#ifdef __cplusplus\n"
"}\n"
"#endif\n"
"\n"
"#endif\n");
}
static void
emit_messages(struct wl_list *message_list,
struct interface *interface, const char *suffix)
{
struct message *m;
struct arg *a;
if (wl_list_empty(message_list))
return;
printf("static const struct wl_message "
"%s_%s[] = {\n",
interface->name, suffix);
wl_list_for_each(m, message_list, link) {
printf("\t{ \"%s\", \"", m->name);
wl_list_for_each(a, &m->arg_list, link) {
switch (a->type) {
default:
case INT:
printf("i");
break;
case NEW_ID:
printf("n");
break;
case UNSIGNED:
printf("u");
break;
case STRING:
printf("s");
break;
case OBJECT:
printf("o");
break;
case ARRAY:
printf("a");
break;
case FD:
printf("h");
break;
}
}
printf("\" },\n");
}
printf("};\n\n");
}
static void
emit_code(struct protocol *protocol)
{
struct interface *i;
printf("%s\n\n"
"#include <stdlib.h>\n"
"#include <stdint.h>\n"
"#include \"wayland-util.h\"\n\n",
copyright);
wl_list_for_each(i, &protocol->interface_list, link) {
emit_messages(&i->request_list, i, "requests");
emit_messages(&i->event_list, i, "events");
printf("WL_EXPORT const struct wl_interface "
"wl_%s_interface = {\n"
"\t\"%s\", %d,\n",
i->name, i->name, i->version);
if (!wl_list_empty(&i->request_list))
printf("\tARRAY_LENGTH(%s_requests), %s_requests,\n",
i->name, i->name);
else
printf("\t0, NULL,\n");
if (!wl_list_empty(&i->event_list))
printf("\tARRAY_LENGTH(%s_events), %s_events,\n",
i->name, i->name);
else
printf("\t0, NULL,\n");
printf("};\n\n");
}
}
int main(int argc, char *argv[])
{
struct parse_context ctx;
struct protocol protocol;
XML_Parser parser;
int len;
void *buf;
if (argc != 2)
usage(EXIT_FAILURE);
wl_list_init(&protocol.interface_list);
ctx.protocol = &protocol;
parser = XML_ParserCreate(NULL);
XML_SetUserData(parser, &ctx);
if (parser == NULL) {
fprintf(stderr, "failed to create parser\n");
exit(EXIT_FAILURE);
}
XML_SetElementHandler(parser, start_element, NULL);
do {
buf = XML_GetBuffer(parser, XML_BUFFER_SIZE);
len = fread(buf, 1, XML_BUFFER_SIZE, stdin);
if (len < 0) {
fprintf(stderr, "fread: %s\n", strerror(errno));
exit(EXIT_FAILURE);
}
XML_ParseBuffer(parser, len, len == 0);
} while (len > 0);
XML_ParserFree(parser);
if (strcmp(argv[1], "client-header") == 0) {
emit_header(&protocol, 0);
} else if (strcmp(argv[1], "server-header") == 0) {
emit_header(&protocol, 1);
} else if (strcmp(argv[1], "code") == 0) {
emit_code(&protocol);
}
return 0;
}

8
wayland/scanner.mk
Unescape View File

@ -1,8 +0,0 @@
%-protocol.c : $(top_srcdir)/protocol/%.xml
$(AM_V_GEN)$(top_builddir)/wayland/scanner code < $< > $@
%-server-protocol.h : $(top_srcdir)/protocol/%.xml
$(AM_V_GEN)$(top_builddir)/wayland/scanner server-header < $< > $@
%-client-protocol.h : $(top_srcdir)/protocol/%.xml
$(AM_V_GEN)$(top_builddir)/wayland/scanner client-header < $< > $@

565
wayland/wayland-client.c
Unescape View File

@ -1,565 +0,0 @@
/*
* Copyright © 2008 Kristian Høgsberg
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
* the above copyright notice appear in all copies and that both that copyright
* notice and this permission notice appear in supporting documentation, and
* that the name of the copyright holders not be used in advertising or
* publicity pertaining to distribution of the software without specific,
* written prior permission. The copyright holders make no representations
* about the suitability of this software for any purpose. It is provided "as
* is" without express or implied warranty.
*
* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
* EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
* OF THIS SOFTWARE.
*/
#include <stdlib.h>
#include <stdint.h>
#include <stddef.h>
#include <stdio.h>
#include <errno.h>
#include <string.h>
#include <unistd.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <ctype.h>
#include <assert.h>
#include <sys/poll.h>
#include "wayland-client-protocol.h"
#include "connection.h"
#include "wayland-util.h"
#include "wayland-client.h"
struct wl_global_listener {
wl_display_global_func_t handler;
void *data;
struct wl_list link;
};
struct wl_listener {
void (**implementation)(void);
void *data;
struct wl_list link;
};
struct wl_proxy {
struct wl_object object;
struct wl_display *display;
struct wl_list listener_list;
void *user_data;
};
struct wl_sync_handler {
wl_display_sync_func_t func;
uint32_t key;
void *data;
struct wl_list link;
};
struct wl_frame_handler {
wl_display_frame_func_t func;
uint32_t key;
void *data;
struct wl_list link;
};
struct wl_display {
struct wl_proxy proxy;
struct wl_connection *connection;
int fd;
uint32_t id, id_count, next_range;
uint32_t mask;
struct wl_hash_table *objects;
struct wl_listener listener;
struct wl_list global_listener_list;
struct wl_visual *argb_visual;
struct wl_visual *premultiplied_argb_visual;
struct wl_visual *rgb_visual;
wl_display_update_func_t update;
void *update_data;
wl_display_global_func_t global_handler;
void *global_handler_data;
struct wl_list sync_list, frame_list;
uint32_t key;
};
static int wl_debug = 0;
static int
connection_update(struct wl_connection *connection,
uint32_t mask, void *data)
{
struct wl_display *display = data;
display->mask = mask;
if (display->update)
return display->update(display->mask,
display->update_data);
return 0;
}
WL_EXPORT struct wl_global_listener *
wl_display_add_global_listener(struct wl_display *display,
wl_display_global_func_t handler, void *data)
{
struct wl_global_listener *listener;
listener = malloc(sizeof *listener);
if (listener == NULL)
return NULL;
listener->handler = handler;
listener->data = data;
wl_list_insert(display->global_listener_list.prev, &listener->link);
return listener;
}
WL_EXPORT void
wl_display_remove_global_listener(struct wl_display *display,
struct wl_global_listener *listener)
{
wl_list_remove(&listener->link);
free(listener);
}
WL_EXPORT struct wl_proxy *
wl_proxy_create_for_id(struct wl_display *display,
const struct wl_interface *interface, uint32_t id)
{
struct wl_proxy *proxy;
proxy = malloc(sizeof *proxy);
if (proxy == NULL)
return NULL;
proxy->object.interface = interface;
proxy->object.id = id;
proxy->display = display;
wl_list_init(&proxy->listener_list);
wl_hash_table_insert(display->objects, proxy->object.id, proxy);
return proxy;
}
WL_EXPORT struct wl_proxy *
wl_proxy_create(struct wl_proxy *factory,
const struct wl_interface *interface)
{
return wl_proxy_create_for_id(factory->display, interface,
wl_display_allocate_id(factory->display));
}
WL_EXPORT void
wl_proxy_destroy(struct wl_proxy *proxy)
{
struct wl_listener *listener, *next;
wl_list_for_each_safe(listener, next, &proxy->listener_list, link)
free(listener);
wl_hash_table_remove(proxy->display->objects, proxy->object.id);
free(proxy);
}
WL_EXPORT int
wl_proxy_add_listener(struct wl_proxy *proxy,
void (**implementation)(void), void *data)
{
struct wl_listener *listener;
listener = malloc(sizeof *listener);
if (listener == NULL)
return -1;
listener->implementation = (void (**)(void)) implementation;
listener->data = data;
wl_list_insert(proxy->listener_list.prev, &listener->link);
return 0;
}
WL_EXPORT void
wl_proxy_marshal(struct wl_proxy *proxy, uint32_t opcode, ...)
{
struct wl_closure *closure;
va_list ap;
va_start(ap, opcode);
closure = wl_connection_vmarshal(proxy->display->connection,
&proxy->object, opcode, ap,
&proxy->object.interface->methods[opcode]);
va_end(ap);
wl_closure_send(closure, proxy->display->connection);
if (wl_debug) {
fprintf(stderr, " -> ");
wl_closure_print(closure, &proxy->object);
}
wl_closure_destroy(closure);
}
static void
add_visual(struct wl_display *display, uint32_t id)
{
struct wl_visual *visual;
visual = (struct wl_visual *)
wl_proxy_create_for_id(display, &wl_visual_interface, id);
if (display->argb_visual == NULL)
display->argb_visual = visual;
else if (display->premultiplied_argb_visual == NULL)
display->premultiplied_argb_visual = visual;
else
display->rgb_visual = visual;
}
WL_EXPORT struct wl_visual *
wl_display_get_argb_visual(struct wl_display *display)
{
return display->argb_visual;
}
WL_EXPORT struct wl_visual *
wl_display_get_premultiplied_argb_visual(struct wl_display *display)
{
return display->premultiplied_argb_visual;
}
WL_EXPORT struct wl_visual *
wl_display_get_rgb_visual(struct wl_display *display)
{
return display->rgb_visual;
}
static void
display_handle_invalid_object(void *data,
struct wl_display *display, uint32_t id)
{
fprintf(stderr, "sent request to invalid object\n");
abort();
}
static void
display_handle_invalid_method(void *data,
struct wl_display *display,
uint32_t id, uint32_t opcode)
{
fprintf(stderr, "sent invalid request opcode\n");
abort();
}
static void
display_handle_no_memory(void *data,
struct wl_display *display)
{
fprintf(stderr, "server out of memory\n");
abort();
}
static void
display_handle_global(void *data,
struct wl_display *display,
uint32_t id, const char *interface, uint32_t version)
{
struct wl_global_listener *listener;
if (strcmp(interface, "display") == 0)
wl_hash_table_insert(display->objects,
id, &display->proxy.object);
else if (strcmp(interface, "visual") == 0)
add_visual(display, id);
wl_list_for_each(listener, &display->global_listener_list, link)
(*listener->handler)(display,
id, interface, version, listener->data);
}
static void
display_handle_range(void *data,
struct wl_display *display, uint32_t range)
{
display->next_range = range;
}
static void
display_handle_key(void *data,
struct wl_display *display, uint32_t key, uint32_t time)
{
struct wl_sync_handler *sync_handler;
struct wl_frame_handler *frame_handler;
sync_handler = container_of(display->sync_list.next,
struct wl_sync_handler, link);
if (!wl_list_empty(&display->sync_list) && sync_handler->key == key) {
wl_list_remove(&sync_handler->link);
sync_handler->func(sync_handler->data);
free(sync_handler);
return;
}
frame_handler = container_of(display->frame_list. next,
struct wl_frame_handler, link);
if (!wl_list_empty(&display->frame_list) &&
frame_handler->key == key) {
wl_list_remove(&frame_handler->link);
frame_handler->func(frame_handler->data, time);
free(frame_handler);
return;
}
fprintf(stderr, "unsolicited sync event, client gone?\n");
}
static const struct wl_display_listener display_listener = {
display_handle_invalid_object,
display_handle_invalid_method,
display_handle_no_memory,
display_handle_global,
display_handle_range,
display_handle_key
};
WL_EXPORT struct wl_display *
wl_display_connect(const char *name)
{
struct wl_display *display;
struct sockaddr_un addr;
socklen_t size;
const char *runtime_dir;
const char *debug;
size_t name_size;
debug = getenv("WAYLAND_DEBUG");
if (debug)
wl_debug = 1;
display = malloc(sizeof *display);
if (display == NULL)
return NULL;
memset(display, 0, sizeof *display);
display->fd = socket(PF_LOCAL, SOCK_STREAM, 0);
if (display->fd < 0) {
free(display);
return NULL;
}
runtime_dir = getenv("XDG_RUNTIME_DIR");
if (runtime_dir == NULL) {
runtime_dir = ".";
fprintf(stderr,
"XDG_RUNTIME_DIR not set, falling back to %s\n",
runtime_dir);
}
if (name == NULL)
name = getenv("WAYLAND_DISPLAY");
if (name == NULL)
name = "wayland-0";
memset(&addr, 0, sizeof addr);
addr.sun_family = AF_LOCAL;
name_size =
snprintf(addr.sun_path, sizeof addr.sun_path,
"%s/%s", runtime_dir, name) + 1;
size = offsetof (struct sockaddr_un, sun_path) + name_size;
if (connect(display->fd, (struct sockaddr *) &addr, size) < 0) {
close(display->fd);
free(display);
return NULL;
}
display->objects = wl_hash_table_create();
wl_list_init(&display->global_listener_list);
display->proxy.object.interface = &wl_display_interface;
display->proxy.object.id = 1;
display->proxy.display = display;
wl_list_init(&display->proxy.listener_list);
wl_list_init(&display->sync_list);
wl_list_init(&display->frame_list);
display->listener.implementation = (void(**)(void)) &display_listener;
wl_list_insert(display->proxy.listener_list.prev, &display->listener.link);
display->connection = wl_connection_create(display->fd,
connection_update,
display);
return display;
}
WL_EXPORT void
wl_display_destroy(struct wl_display *display)
{
wl_connection_destroy(display->connection);
close(display->fd);
free(display);
}
WL_EXPORT int
wl_display_get_fd(struct wl_display *display,
wl_display_update_func_t update, void *data)
{
display->update = update;
display->update_data = data;
display->update(display->mask, display->update_data);
return display->fd;
}
WL_EXPORT int
wl_display_sync_callback(struct wl_display *display,
wl_display_sync_func_t func, void *data)
{
struct wl_sync_handler *handler;
handler = malloc(sizeof *handler);
if (handler == NULL)
return -1;
handler->func = func;
handler->key = display->key++;
handler->data = data;
wl_list_insert(display->sync_list.prev, &handler->link);
wl_display_sync(display, handler->key);
return 0;
}
WL_EXPORT int
wl_display_frame_callback(struct wl_display *display,
wl_display_frame_func_t func, void *data)
{
struct wl_frame_handler *handler;
handler = malloc(sizeof *handler);
if (handler == NULL)
return -1;
handler->func = func;
handler->key = display->key++;
handler->data = data;
wl_list_insert(display->frame_list.prev, &handler->link);
wl_display_frame(display, handler->key);
return 0;
}
static void
handle_event(struct wl_display *display,
uint32_t id, uint32_t opcode, uint32_t size)
{
uint32_t p[32];
struct wl_listener *listener;
struct wl_proxy *proxy;
struct wl_closure *closure;
const struct wl_message *message;
wl_connection_copy(display->connection, p, size);
if (id == 1)
proxy = &display->proxy;
else
proxy = wl_hash_table_lookup(display->objects, id);
if (proxy == NULL) {
wl_connection_consume(display->connection, size);
return;
}
message = &proxy->object.interface->events[opcode];
closure = wl_connection_demarshal(display->connection,
size, display->objects, message);
if (wl_debug)
wl_closure_print(closure, &proxy->object);
wl_list_for_each(listener, &proxy->listener_list, link)
wl_closure_invoke(closure, &proxy->object,
listener->implementation[opcode],
listener->data);
wl_closure_destroy(closure);
}
WL_EXPORT void
wl_display_iterate(struct wl_display *display, uint32_t mask)
{
uint32_t p[2], object, opcode, size;
int len;
mask &= display->mask;
if (mask == 0) {
fprintf(stderr,
"wl_display_iterate called with unsolicited flags");
return;
}
len = wl_connection_data(display->connection, mask);
while (len > 0) {
if (len < sizeof p)
break;
wl_connection_copy(display->connection, p, sizeof p);
object = p[0];
opcode = p[1] & 0xffff;
size = p[1] >> 16;
if (len < size)
break;
handle_event(display, object, opcode, size);
len -= size;
}
if (len < 0) {
fprintf(stderr, "read error: %m\n");
exit(EXIT_FAILURE);
}
}
WL_EXPORT uint32_t
wl_display_allocate_id(struct wl_display *display)
{
if (display->id_count == 0) {
display->id_count = 256;
display->id = display->next_range;
}
display->id_count--;
return display->id++;
}
WL_EXPORT void
wl_proxy_set_user_data(struct wl_proxy *proxy, void *user_data)
{
proxy->user_data = user_data;
}
WL_EXPORT void *
wl_proxy_get_user_data(struct wl_proxy *proxy)
{
return proxy->user_data;
}

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wayland/wayland-client.h
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/*
* Copyright © 2008 Kristian Høgsberg
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
* the above copyright notice appear in all copies and that both that copyright
* notice and this permission notice appear in supporting documentation, and
* that the name of the copyright holders not be used in advertising or
* publicity pertaining to distribution of the software without specific,
* written prior permission. The copyright holders make no representations
* about the suitability of this software for any purpose. It is provided "as
* is" without express or implied warranty.
*
* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
* EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
* OF THIS SOFTWARE.
*/
#ifndef _WAYLAND_CLIENT_H
#define _WAYLAND_CLIENT_H
#include "wayland-util.h"
#include "wayland-client-protocol.h"
#ifdef __cplusplus
extern "C" {
#endif
#define WL_DISPLAY_READABLE 0x01
#define WL_DISPLAY_WRITABLE 0x02
typedef int (*wl_display_update_func_t)(uint32_t mask, void *data);
typedef void (*wl_display_sync_func_t)(void *data);
typedef void (*wl_display_frame_func_t)(void *data, uint32_t time);
struct wl_display *wl_display_connect(const char *name);
void wl_display_destroy(struct wl_display *display);
int wl_display_get_fd(struct wl_display *display,
wl_display_update_func_t update, void *data);
uint32_t wl_display_allocate_id(struct wl_display *display);
void wl_display_iterate(struct wl_display *display, uint32_t mask);
int wl_display_sync_callback(struct wl_display *display,
wl_display_sync_func_t func, void *data);
int wl_display_frame_callback(struct wl_display *display,
wl_display_frame_func_t func, void *data);
struct wl_global_listener;
typedef void (*wl_display_global_func_t)(struct wl_display *display,
uint32_t id,
const char *interface,
uint32_t version,
void *data);
void
wl_display_remove_global_listener(struct wl_display *display,
struct wl_global_listener *listener);
struct wl_global_listener *
wl_display_add_global_listener(struct wl_display *display,
wl_display_global_func_t handler, void *data);
struct wl_visual *
wl_display_get_argb_visual(struct wl_display *display);
struct wl_visual *
wl_display_get_premultiplied_argb_visual(struct wl_display *display);
struct wl_visual *
wl_display_get_rgb_visual(struct wl_display *display);
#ifdef __cplusplus
}
#endif
#endif

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wayland/wayland-client.pc.in
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prefix=@prefix@
exec_prefix=${prefix}
libdir=${exec_prefix}/lib
includedir=${prefix}/include
Name: Wayland Client
Description: Wayland client side library
Version: 0.1
Cflags: -I${includedir}
Libs: -L${libdir} -lwayland-client

82
wayland/wayland-egl.h
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/*
* Copyright © 2011 Kristian Høgsberg
* Copyright © 2011 Benjamin Franzke
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
* the above copyright notice appear in all copies and that both that copyright
* notice and this permission notice appear in supporting documentation, and
* that the name of the copyright holders not be used in advertising or
* publicity pertaining to distribution of the software without specific,
* written prior permission. The copyright holders make no representations
* about the suitability of this software for any purpose. It is provided "as
* is" without express or implied warranty.
*
* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
* EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
* OF THIS SOFTWARE.
*/
#ifndef _WAYLAND_EGL_H
#define _WAYLAND_EGL_H
#ifdef __cplusplus
extern "C" {
#endif
#include <wayland-client.h>
#define WL_EGL_PLATFORM 1
struct wl_egl_display;
struct wl_egl_window;
struct wl_egl_pixmap;
struct wl_egl_display *
wl_egl_display_create(struct wl_display *egl_display);
void
wl_egl_display_destroy(struct wl_egl_display *egl_display);
struct wl_egl_window *
wl_egl_window_create(struct wl_egl_display *egl_display,
struct wl_surface *surface,
int width, int height,
struct wl_visual *visual);
void
wl_egl_window_destroy(struct wl_egl_window *egl_window);
void
wl_egl_window_resize(struct wl_egl_window *egl_window,
int width, int height,
int dx, int dy);
void
wl_egl_window_get_attached_size(struct wl_egl_window *egl_window,
int *width, int *height);
struct wl_egl_pixmap *
wl_egl_pixmap_create(struct wl_egl_display *egl_display,
int width, int height,
struct wl_visual *visual, uint32_t flags);
void
wl_egl_pixmap_destroy(struct wl_egl_pixmap *egl_pixmap);
struct wl_buffer *
wl_egl_pixmap_create_buffer(struct wl_egl_display *egl_display,
struct wl_egl_pixmap *egl_pixmap);
void
wl_egl_pixmap_flush(struct wl_egl_display *egl_display,
struct wl_egl_pixmap *egl_pixmap);
#ifdef __cplusplus
}
#endif
#endif

296
wayland/wayland-hash.c
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/*
* Copyright © 2009 Intel Corporation
* Copyright © 1988-2004 Keith Packard and Bart Massey.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*
* Except as contained in this notice, the names of the authors
* or their institutions shall not be used in advertising or
* otherwise to promote the sale, use or other dealings in this
* Software without prior written authorization from the
* authors.
*
* Authors:
* Eric Anholt <eric@anholt.net>
* Keith Packard <keithp@keithp.com>
*/
#include <stdlib.h>
#include "wayland-util.h"
struct hash_entry {
uint32_t hash;
void *data;
};
struct wl_hash_table {
struct hash_entry *table;
uint32_t size;
uint32_t rehash;
uint32_t max_entries;
uint32_t size_index;
uint32_t entries;
uint32_t deleted_entries;
};
#define ARRAY_SIZE(array) (sizeof(array) / sizeof(array[0]))
/*
* From Knuth -- a good choice for hash/rehash values is p, p-2 where
* p and p-2 are both prime. These tables are sized to have an extra 10%
* free to avoid exponential performance degradation as the hash table fills
*/
static const uint32_t deleted_data;
static const struct {
uint32_t max_entries, size, rehash;
} hash_sizes[] = {
{ 2, 5, 3 },
{ 4, 7, 5 },
{ 8, 13, 11 },
{ 16, 19, 17 },
{ 32, 43, 41 },
{ 64, 73, 71 },
{ 128, 151, 149 },
{ 256, 283, 281 },
{ 512, 571, 569 },
{ 1024, 1153, 1151 },
{ 2048, 2269, 2267 },
{ 4096, 4519, 4517 },
{ 8192, 9013, 9011 },
{ 16384, 18043, 18041 },
{ 32768, 36109, 36107 },
{ 65536, 72091, 72089 },
{ 131072, 144409, 144407 },
{ 262144, 288361, 288359 },
{ 524288, 576883, 576881 },
{ 1048576, 1153459, 1153457 },
{ 2097152, 2307163, 2307161 },
{ 4194304, 4613893, 4613891 },
{ 8388608, 9227641, 9227639 },
{ 16777216, 18455029, 18455027 },
{ 33554432, 36911011, 36911009 },
{ 67108864, 73819861, 73819859 },
{ 134217728, 147639589, 147639587 },
{ 268435456, 295279081, 295279079 },
{ 536870912, 590559793, 590559791 },
{ 1073741824, 1181116273, 1181116271},
{ 2147483648ul, 2362232233ul, 2362232231ul}
};
static int
entry_is_free(struct hash_entry *entry)
{
return entry->data == NULL;
}
static int
entry_is_deleted(struct hash_entry *entry)
{
return entry->data == &deleted_data;
}
static int
entry_is_present(struct hash_entry *entry)
{
return entry->data != NULL && entry->data != &deleted_data;
}
WL_EXPORT struct wl_hash_table *
wl_hash_table_create(void)
{
struct wl_hash_table *ht;
ht = malloc(sizeof(*ht));
if (ht == NULL)
return NULL;
ht->size_index = 0;
ht->size = hash_sizes[ht->size_index].size;
ht->rehash = hash_sizes[ht->size_index].rehash;
ht->max_entries = hash_sizes[ht->size_index].max_entries;
ht->table = calloc(ht->size, sizeof(*ht->table));
ht->entries = 0;
ht->deleted_entries = 0;
if (ht->table == NULL) {
free(ht);
return NULL;
}
return ht;
}
/**
* Frees the given hash table.
*/
WL_EXPORT void
wl_hash_table_destroy(struct wl_hash_table *ht)
{
if (!ht)
return;
free(ht->table);
free(ht);
}
/**
* Finds a hash table entry with the given key and hash of that key.
*
* Returns NULL if no entry is found. Note that the data pointer may be
* modified by the user.
*/
static void *
hash_table_search(struct wl_hash_table *ht, uint32_t hash)
{
uint32_t hash_address;
hash_address = hash % ht->size;
do {
uint32_t double_hash;
struct hash_entry *entry = ht->table + hash_address;
if (entry_is_free(entry)) {
return NULL;
} else if (entry_is_present(entry) && entry->hash == hash) {
return entry;
}
double_hash = hash % ht->rehash;
if (double_hash == 0)
double_hash = 1;
hash_address = (hash_address + double_hash) % ht->size;
} while (hash_address != hash % ht->size);
return NULL;
}
WL_EXPORT void *
wl_hash_table_lookup(struct wl_hash_table *ht, uint32_t hash)
{
struct hash_entry *entry;
entry = hash_table_search(ht, hash);
if (entry != NULL)
return entry->data;
return NULL;
}
static void
hash_table_rehash(struct wl_hash_table *ht, int new_size_index)
{
struct wl_hash_table old_ht;
struct hash_entry *table, *entry;
if (new_size_index >= ARRAY_SIZE(hash_sizes))
return;
table = calloc(hash_sizes[new_size_index].size, sizeof(*ht->table));
if (table == NULL)
return;
old_ht = *ht;
ht->table = table;
ht->size_index = new_size_index;
ht->size = hash_sizes[ht->size_index].size;
ht->rehash = hash_sizes[ht->size_index].rehash;
ht->max_entries = hash_sizes[ht->size_index].max_entries;
ht->entries = 0;
ht->deleted_entries = 0;
for (entry = old_ht.table;
entry != old_ht.table + old_ht.size;
entry++) {
if (entry_is_present(entry)) {
wl_hash_table_insert(ht, entry->hash, entry->data);
}
}
free(old_ht.table);
}
/**
* Inserts the data with the given hash into the table.
*
* Note that insertion may rearrange the table on a resize or rehash,
* so previously found hash_entries are no longer valid after this function.
*/
WL_EXPORT int
wl_hash_table_insert(struct wl_hash_table *ht, uint32_t hash, void *data)
{
uint32_t hash_address;
if (ht->entries >= ht->max_entries) {
hash_table_rehash(ht, ht->size_index + 1);
} else if (ht->deleted_entries + ht->entries >= ht->max_entries) {
hash_table_rehash(ht, ht->size_index);
}
hash_address = hash % ht->size;
do {
struct hash_entry *entry = ht->table + hash_address;
uint32_t double_hash;
if (!entry_is_present(entry)) {
if (entry_is_deleted(entry))
ht->deleted_entries--;
entry->hash = hash;
entry->data = data;
ht->entries++;
return 0;
}
double_hash = hash % ht->rehash;
if (double_hash == 0)
double_hash = 1;
hash_address = (hash_address + double_hash) % ht->size;
} while (hash_address != hash % ht->size);
/* We could hit here if a required resize failed. An unchecked-malloc
* application could ignore this result.
*/
return -1;
}
/**
* This function deletes the given hash table entry.
*
* Note that deletion doesn't otherwise modify the table, so an iteration over
* the table deleting entries is safe.
*/
WL_EXPORT void
wl_hash_table_remove(struct wl_hash_table *ht, uint32_t hash)
{
struct hash_entry *entry;
entry = hash_table_search(ht, hash);
if (entry != NULL) {
entry->data = (void *) &deleted_data;
ht->entries--;
ht->deleted_entries++;
}
}

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wayland/wayland-server.c
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/*
* Copyright © 2008 Kristian Høgsberg
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
* the above copyright notice appear in all copies and that both that copyright
* notice and this permission notice appear in supporting documentation, and
* that the name of the copyright holders not be used in advertising or
* publicity pertaining to distribution of the software without specific,
* written prior permission. The copyright holders make no representations
* about the suitability of this software for any purpose. It is provided "as
* is" without express or implied warranty.
*
* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
* EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
* OF THIS SOFTWARE.
*/
#include <stdlib.h>
#include <stdint.h>
#include <stddef.h>
#include <stdio.h>
#include <stdarg.h>
#include <errno.h>
#include <string.h>
#include <unistd.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <dlfcn.h>
#include <assert.h>
#include <sys/time.h>
#include <ffi.h>
#include "wayland-server.h"
#include "wayland-server-protocol.h"
#include "connection.h"
struct wl_socket {
int fd;
struct sockaddr_un addr;
struct wl_list link;
};
struct wl_client {
struct wl_connection *connection;
struct wl_event_source *source;
struct wl_display *display;
struct wl_list resource_list;
uint32_t id_count;
};
struct wl_display {
struct wl_object object;
struct wl_event_loop *loop;
struct wl_hash_table *objects;
int run;
struct wl_list frame_list;
uint32_t client_id_range;
uint32_t id;
struct wl_list global_list;
struct wl_list socket_list;
};
struct wl_frame_listener {
struct wl_resource resource;
struct wl_client *client;
uint32_t key;
struct wl_list link;
};
struct wl_global {
struct wl_object *object;
wl_client_connect_func_t func;
struct wl_list link;
};
static int wl_debug = 0;
WL_EXPORT void
wl_client_post_event(struct wl_client *client, struct wl_object *sender,
uint32_t opcode, ...)
{
struct wl_closure *closure;
va_list ap;
va_start(ap, opcode);
closure = wl_connection_vmarshal(client->connection,
sender, opcode, ap,
&sender->interface->events[opcode]);
va_end(ap);
wl_closure_send(closure, client->connection);
if (wl_debug) {
fprintf(stderr, " -> ");
wl_closure_print(closure, sender);
}
wl_closure_destroy(closure);
}
static void
wl_client_connection_data(int fd, uint32_t mask, void *data)
{
struct wl_client *client = data;
struct wl_connection *connection = client->connection;
struct wl_object *object;
struct wl_closure *closure;
const struct wl_message *message;
uint32_t p[2], opcode, size;
uint32_t cmask = 0;
int len;
if (mask & WL_EVENT_READABLE)
cmask |= WL_CONNECTION_READABLE;
if (mask & WL_EVENT_WRITEABLE)
cmask |= WL_CONNECTION_WRITABLE;
len = wl_connection_data(connection, cmask);
if (len < 0) {
wl_client_destroy(client);
return;
}
while (len >= sizeof p) {
wl_connection_copy(connection, p, sizeof p);
opcode = p[1] & 0xffff;
size = p[1] >> 16;
if (len < size)
break;
object = wl_hash_table_lookup(client->display->objects, p[0]);
if (object == NULL) {
wl_client_post_event(client, &client->display->object,
WL_DISPLAY_INVALID_OBJECT, p[0]);
wl_connection_consume(connection, size);
len -= size;
continue;
}
if (opcode >= object->interface->method_count) {
wl_client_post_event(client, &client->display->object,
WL_DISPLAY_INVALID_METHOD, p[0], opcode);
wl_connection_consume(connection, size);
len -= size;
continue;
}
message = &object->interface->methods[opcode];
closure = wl_connection_demarshal(client->connection, size,
client->display->objects,
message);
len -= size;
if (closure == NULL && errno == EINVAL) {
wl_client_post_event(client, &client->display->object,
WL_DISPLAY_INVALID_METHOD,
p[0], opcode);
continue;
} else if (closure == NULL && errno == ENOMEM) {
wl_client_post_no_memory(client);
continue;
}
if (wl_debug)
wl_closure_print(closure, object);
wl_closure_invoke(closure, object,
object->implementation[opcode], client);
wl_closure_destroy(closure);
}
}
static int
wl_client_connection_update(struct wl_connection *connection,
uint32_t mask, void *data)
{
struct wl_client *client = data;
uint32_t emask = 0;
if (mask & WL_CONNECTION_READABLE)
emask |= WL_EVENT_READABLE;
if (mask & WL_CONNECTION_WRITABLE)
emask |= WL_EVENT_WRITEABLE;
return wl_event_source_fd_update(client->source, emask);
}
WL_EXPORT struct wl_display *
wl_client_get_display(struct wl_client *client)
{
return client->display;
}
static void
wl_display_post_range(struct wl_display *display, struct wl_client *client)
{
wl_client_post_event(client, &client->display->object,
WL_DISPLAY_RANGE, display->client_id_range);
display->client_id_range += 256;
client->id_count += 256;
}
static struct wl_client *
wl_client_create(struct wl_display *display, int fd)
{
struct wl_client *client;
struct wl_global *global;
client = malloc(sizeof *client);
if (client == NULL)
return NULL;
memset(client, 0, sizeof *client);
client->display = display;
client->source = wl_event_loop_add_fd(display->loop, fd,
WL_EVENT_READABLE,
wl_client_connection_data, client);
client->connection =
wl_connection_create(fd, wl_client_connection_update, client);
wl_list_init(&client->resource_list);
wl_display_post_range(display, client);
wl_list_for_each(global, &display->global_list, link)
wl_client_post_event(client, &client->display->object,
WL_DISPLAY_GLOBAL,
global->object,
global->object->interface->name,
global->object->interface->version);
wl_list_for_each(global, &display->global_list, link)
if (global->func)
global->func(client, global->object);
return client;
}
WL_EXPORT void
wl_client_add_resource(struct wl_client *client,
struct wl_resource *resource)
{
struct wl_display *display = client->display;
if (client->id_count-- < 64)
wl_display_post_range(display, client);
wl_hash_table_insert(client->display->objects,
resource->object.id, resource);
wl_list_insert(client->resource_list.prev, &resource->link);
}
WL_EXPORT void
wl_client_post_no_memory(struct wl_client *client)
{
wl_client_post_event(client,
&client->display->object,
WL_DISPLAY_NO_MEMORY);
}
WL_EXPORT void
wl_client_post_global(struct wl_client *client, struct wl_object *object)
{
wl_client_post_event(client,
&client->display->object,
WL_DISPLAY_GLOBAL,
object,
object->interface->name,
object->interface->version);
}
WL_EXPORT void
wl_resource_destroy(struct wl_resource *resource, struct wl_client *client)
{
struct wl_display *display = client->display;
wl_list_remove(&resource->link);
if (resource->object.id > 0)
wl_hash_table_remove(display->objects, resource->object.id);
resource->destroy(resource, client);
}
WL_EXPORT void
wl_client_destroy(struct wl_client *client)
{
struct wl_resource *resource, *tmp;
printf("disconnect from client %p\n", client);
wl_list_for_each_safe(resource, tmp, &client->resource_list, link)
wl_resource_destroy(resource, client);
wl_event_source_remove(client->source);
wl_connection_destroy(client->connection);
free(client);
}
static void
lose_pointer_focus(struct wl_listener *listener,
struct wl_surface *surface, uint32_t time)
{
struct wl_input_device *device =
container_of(listener, struct wl_input_device,
pointer_focus_listener);
wl_input_device_set_pointer_focus(device, NULL, time, 0, 0, 0, 0);
}
static void
lose_keyboard_focus(struct wl_listener *listener,
struct wl_surface *surface, uint32_t time)
{
struct wl_input_device *device =
container_of(listener, struct wl_input_device,
keyboard_focus_listener);
wl_input_device_set_keyboard_focus(device, NULL, time);
}
WL_EXPORT void
wl_input_device_init(struct wl_input_device *device,
struct wl_compositor *compositor)
{
wl_list_init(&device->pointer_focus_listener.link);
device->pointer_focus_listener.func = lose_pointer_focus;
wl_list_init(&device->keyboard_focus_listener.link);
device->keyboard_focus_listener.func = lose_keyboard_focus;
device->x = 100;
device->y = 100;
device->compositor = compositor;
}
WL_EXPORT void
wl_input_device_set_pointer_focus(struct wl_input_device *device,
struct wl_surface *surface,
uint32_t time,
int32_t x, int32_t y,
int32_t sx, int32_t sy)
{
if (device->pointer_focus == surface)
return;
if (device->pointer_focus &&
(!surface || device->pointer_focus->client != surface->client))
wl_client_post_event(device->pointer_focus->client,
&device->object,
WL_INPUT_DEVICE_POINTER_FOCUS,
time, NULL, 0, 0, 0, 0);
if (surface)
wl_client_post_event(surface->client,
&device->object,
WL_INPUT_DEVICE_POINTER_FOCUS,
time, surface, x, y, sx, sy);
device->pointer_focus = surface;
device->pointer_focus_time = time;
wl_list_remove(&device->pointer_focus_listener.link);
if (surface)
wl_list_insert(surface->destroy_listener_list.prev,
&device->pointer_focus_listener.link);
}
WL_EXPORT void
wl_input_device_set_keyboard_focus(struct wl_input_device *device,
struct wl_surface *surface,
uint32_t time)
{
if (device->keyboard_focus == surface)
return;
if (device->keyboard_focus &&
(!surface || device->keyboard_focus->client != surface->client))
wl_client_post_event(device->keyboard_focus->client,
&device->object,
WL_INPUT_DEVICE_KEYBOARD_FOCUS,
time, NULL, &device->keys);
if (surface)
wl_client_post_event(surface->client,
&device->object,
WL_INPUT_DEVICE_KEYBOARD_FOCUS,
time, surface, &device->keys);
device->keyboard_focus = surface;
device->keyboard_focus_time = time;
wl_list_remove(&device->keyboard_focus_listener.link);
if (surface)
wl_list_insert(surface->destroy_listener_list.prev,
&device->keyboard_focus_listener.link);
}
WL_EXPORT void
wl_input_device_end_grab(struct wl_input_device *device, uint32_t time)
{
const struct wl_grab_interface *interface;
interface = device->grab->interface;
interface->end(device->grab, time);
device->grab->input_device = NULL;
device->grab = NULL;
wl_list_remove(&device->grab_listener.link);
}
static void
lose_grab_surface(struct wl_listener *listener,
struct wl_surface *surface, uint32_t time)
{
struct wl_input_device *device =
container_of(listener,
struct wl_input_device, grab_listener);
wl_input_device_end_grab(device, time);
}
WL_EXPORT void
wl_input_device_start_grab(struct wl_input_device *device,
struct wl_grab *grab,
uint32_t button, uint32_t time)
{
struct wl_surface *focus = device->pointer_focus;
device->grab = grab;
device->grab_button = button;
device->grab_time = time;
device->grab_x = device->x;
device->grab_y = device->y;
device->grab_listener.func = lose_grab_surface;
wl_list_insert(focus->destroy_listener_list.prev,
&device->grab_listener.link);
grab->input_device = device;
}
WL_EXPORT int
wl_input_device_update_grab(struct wl_input_device *device,
struct wl_grab *grab,
struct wl_surface *surface, uint32_t time)
{
if (device->grab != &device->motion_grab ||
device->grab_time != time ||
device->pointer_focus != surface)
return -1;
device->grab = grab;
grab->input_device = device;
return 0;
}
static void
display_sync(struct wl_client *client,
struct wl_display *display, uint32_t key)
{
wl_client_post_event(client, &display->object, WL_DISPLAY_KEY, key, 0);
}
static void
destroy_frame_listener(struct wl_resource *resource, struct wl_client *client)
{
struct wl_frame_listener *listener =
container_of(resource, struct wl_frame_listener, resource);
wl_list_remove(&listener->link);
free(listener);
}
static void
display_frame(struct wl_client *client,
struct wl_display *display, uint32_t key)
{
struct wl_frame_listener *listener;
listener = malloc(sizeof *listener);
if (listener == NULL) {
wl_client_post_no_memory(client);
return;
}
/* The listener is a resource so we destroy it when the client
* goes away. */
listener->resource.destroy = destroy_frame_listener;
listener->resource.object.id = 0;
listener->client = client;
listener->key = key;
wl_list_insert(client->resource_list.prev, &listener->resource.link);
wl_list_insert(display->frame_list.prev, &listener->link);
}
struct wl_display_interface display_interface = {
display_sync,
display_frame
};
WL_EXPORT struct wl_display *
wl_display_create(void)
{
struct wl_display *display;
const char *debug;
debug = getenv("WAYLAND_DEBUG");
if (debug)
wl_debug = 1;
display = malloc(sizeof *display);
if (display == NULL)
return NULL;
display->loop = wl_event_loop_create();
if (display->loop == NULL) {
free(display);
return NULL;
}
display->objects = wl_hash_table_create();
if (display->objects == NULL) {
free(display);
return NULL;
}
wl_list_init(&display->frame_list);
wl_list_init(&display->global_list);
wl_list_init(&display->socket_list);
display->client_id_range = 256; /* Gah, arbitrary... */
display->id = 1;
display->object.interface = &wl_display_interface;
display->object.implementation = (void (**)(void)) &display_interface;
wl_display_add_object(display, &display->object);
if (wl_display_add_global(display, &display->object, NULL)) {
wl_event_loop_destroy(display->loop);
free(display);
return NULL;
}
return display;
}
WL_EXPORT void
wl_display_destroy(struct wl_display *display)
{
struct wl_socket *s, *next;
wl_event_loop_destroy(display->loop);
wl_hash_table_destroy(display->objects);
wl_list_for_each_safe(s, next, &display->socket_list, link) {
close(s->fd);
unlink(s->addr.sun_path);
free(s);
}
free(display);
}
WL_EXPORT void
wl_display_add_object(struct wl_display *display, struct wl_object *object)
{
object->id = display->id++;
wl_hash_table_insert(display->objects, object->id, object);
}
WL_EXPORT int
wl_display_add_global(struct wl_display *display,
struct wl_object *object, wl_client_connect_func_t func)
{
struct wl_global *global;
global = malloc(sizeof *global);
if (global == NULL)
return -1;
global->object = object;
global->func = func;
wl_list_insert(display->global_list.prev, &global->link);
return 0;
}
WL_EXPORT void
wl_display_post_frame(struct wl_display *display, uint32_t time)
{
struct wl_frame_listener *listener, *next;
wl_list_for_each_safe(listener, next, &display->frame_list, link) {
wl_client_post_event(listener->client, &display->object,
WL_DISPLAY_KEY, listener->key, time);
wl_resource_destroy(&listener->resource, listener->client);
}
}
WL_EXPORT struct wl_event_loop *
wl_display_get_event_loop(struct wl_display *display)
{
return display->loop;
}
WL_EXPORT void
wl_display_terminate(struct wl_display *display)
{
display->run = 0;
}
WL_EXPORT void
wl_display_run(struct wl_display *display)
{
display->run = 1;
while (display->run)
wl_event_loop_dispatch(display->loop, -1);
}
static void
socket_data(int fd, uint32_t mask, void *data)
{
struct wl_display *display = data;
struct sockaddr_un name;
socklen_t length;
int client_fd;
length = sizeof name;
client_fd = accept (fd, (struct sockaddr *) &name, &length);
if (client_fd < 0)
fprintf(stderr, "failed to accept\n");
wl_client_create(display, client_fd);
}
WL_EXPORT int
wl_display_add_socket(struct wl_display *display, const char *name)
{
struct wl_socket *s;
socklen_t size, name_size;
const char *runtime_dir;
s = malloc(sizeof *s);
if (s == NULL)
return -1;
s->fd = socket(PF_LOCAL, SOCK_STREAM, 0);
if (s->fd < 0)
return -1;
runtime_dir = getenv("XDG_RUNTIME_DIR");
if (runtime_dir == NULL) {
runtime_dir = ".";
fprintf(stderr,
"XDG_RUNTIME_DIR not set, falling back to %s\n",
runtime_dir);
}
if (name == NULL)
name = getenv("WAYLAND_DISPLAY");
if (name == NULL)
name = "wayland-0";
memset(&s->addr, 0, sizeof s->addr);
s->addr.sun_family = AF_LOCAL;
name_size = snprintf(s->addr.sun_path, sizeof s->addr.sun_path,
"%s/%s", runtime_dir, name) + 1;
fprintf(stderr, "using socket %s\n", s->addr.sun_path);
size = offsetof (struct sockaddr_un, sun_path) + name_size;
if (bind(s->fd, (struct sockaddr *) &s->addr, size) < 0)
return -1;
if (listen(s->fd, 1) < 0)
return -1;
wl_event_loop_add_fd(display->loop, s->fd,
WL_EVENT_READABLE,
socket_data, display);
wl_list_insert(display->socket_list.prev, &s->link);
return 0;
}
WL_EXPORT int
wl_compositor_init(struct wl_compositor *compositor,
const struct wl_compositor_interface *interface,
struct wl_display *display)
{
compositor->object.interface = &wl_compositor_interface;
compositor->object.implementation = (void (**)(void)) interface;
wl_display_add_object(display, &compositor->object);
if (wl_display_add_global(display, &compositor->object, NULL))
return -1;
compositor->argb_visual.object.interface = &wl_visual_interface;
compositor->argb_visual.object.implementation = NULL;
wl_display_add_object(display, &compositor->argb_visual.object);
wl_display_add_global(display, &compositor->argb_visual.object, NULL);
compositor->premultiplied_argb_visual.object.interface =
&wl_visual_interface;
compositor->premultiplied_argb_visual.object.implementation = NULL;
wl_display_add_object(display,
&compositor->premultiplied_argb_visual.object);
wl_display_add_global(display,
&compositor->premultiplied_argb_visual.object,
NULL);
compositor->rgb_visual.object.interface = &wl_visual_interface;
compositor->rgb_visual.object.implementation = NULL;
wl_display_add_object(display,
&compositor->rgb_visual.object);
wl_display_add_global(display,
&compositor->rgb_visual.object, NULL);
return 0;
}

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/*
* Copyright © 2008 Kristian Høgsberg
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
* the above copyright notice appear in all copies and that both that copyright
* notice and this permission notice appear in supporting documentation, and
* that the name of the copyright holders not be used in advertising or
* publicity pertaining to distribution of the software without specific,
* written prior permission. The copyright holders make no representations
* about the suitability of this software for any purpose. It is provided "as
* is" without express or implied warranty.
*
* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
* EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
* OF THIS SOFTWARE.
*/
#ifndef WAYLAND_H
#define WAYLAND_H
#ifdef __cplusplus
extern "C" {
#endif
#include <stdint.h>
#include "wayland-util.h"
#include "wayland-server-protocol.h"
enum {
WL_EVENT_READABLE = 0x01,
WL_EVENT_WRITEABLE = 0x02
};
struct wl_event_loop;
struct wl_event_source;
typedef void (*wl_event_loop_fd_func_t)(int fd, uint32_t mask, void *data);
typedef void (*wl_event_loop_timer_func_t)(void *data);
typedef void (*wl_event_loop_signal_func_t)(int signal_number, void *data);
typedef void (*wl_event_loop_idle_func_t)(void *data);
struct wl_event_loop *wl_event_loop_create(void);
void wl_event_loop_destroy(struct wl_event_loop *loop);
struct wl_event_source *wl_event_loop_add_fd(struct wl_event_loop *loop,
int fd, uint32_t mask,
wl_event_loop_fd_func_t func,
void *data);
int wl_event_source_fd_update(struct wl_event_source *source, uint32_t mask);
struct wl_event_source *wl_event_loop_add_timer(struct wl_event_loop *loop,
wl_event_loop_timer_func_t func,
void *data);
struct wl_event_source *
wl_event_loop_add_signal(struct wl_event_loop *loop,
int signal_number,
wl_event_loop_signal_func_t func,
void *data);
int wl_event_source_timer_update(struct wl_event_source *source,
int ms_delay);
int wl_event_source_remove(struct wl_event_source *source);
int wl_event_loop_dispatch(struct wl_event_loop *loop, int timeout);
struct wl_event_source *wl_event_loop_add_idle(struct wl_event_loop *loop,
wl_event_loop_idle_func_t func,
void *data);
int wl_event_loop_get_fd(struct wl_event_loop *loop);
struct wl_client;
struct wl_display;
struct wl_input_device;
struct wl_display *wl_display_create(void);
void wl_display_destroy(struct wl_display *display);
struct wl_event_loop *wl_display_get_event_loop(struct wl_display *display);
int wl_display_add_socket(struct wl_display *display, const char *name);
void wl_display_terminate(struct wl_display *display);
void wl_display_run(struct wl_display *display);
void wl_display_add_object(struct wl_display *display, struct wl_object *object);
typedef void (*wl_client_connect_func_t)(struct wl_client *client, struct wl_object *global);
int wl_display_add_global(struct wl_display *display, struct wl_object *object, wl_client_connect_func_t func);
void wl_client_destroy(struct wl_client *client);
void wl_client_post_no_memory(struct wl_client *client);
void wl_client_post_global(struct wl_client *client, struct wl_object *object);
struct wl_visual {
struct wl_object object;
};
struct wl_compositor {
struct wl_object object;
struct wl_visual argb_visual;
struct wl_visual premultiplied_argb_visual;
struct wl_visual rgb_visual;
};
struct wl_resource {
struct wl_object object;
void (*destroy)(struct wl_resource *resource,
struct wl_client *client);
struct wl_list link;
};
struct wl_buffer {
struct wl_resource resource;
struct wl_compositor *compositor;
struct wl_visual *visual;
int32_t width, height;
void (*attach)(struct wl_buffer *buffer, struct wl_surface *surface);
void (*damage)(struct wl_buffer *buffer,
struct wl_surface *surface,
int32_t x, int32_t y, int32_t width, int32_t height);
};
struct wl_listener {
struct wl_list link;
void (*func)(struct wl_listener *listener,
struct wl_surface *surface, uint32_t time);
};
struct wl_surface {
struct wl_resource resource;
struct wl_client *client;
struct wl_list destroy_listener_list;
};
struct wl_shell {
struct wl_object object;
};
struct wl_grab;
struct wl_grab_interface {
void (*motion)(struct wl_grab *grab,
uint32_t time, int32_t x, int32_t y);
void (*button)(struct wl_grab *grab,
uint32_t time, int32_t button, int32_t state);
void (*end)(struct wl_grab *grab, uint32_t time);
};
struct wl_grab {
const struct wl_grab_interface *interface;
struct wl_input_device *input_device;
};
struct wl_input_device {
struct wl_object object;
struct wl_compositor *compositor;
struct wl_surface *pointer_focus;
struct wl_surface *keyboard_focus;
struct wl_array keys;
uint32_t pointer_focus_time;
uint32_t keyboard_focus_time;
struct wl_listener pointer_focus_listener;
struct wl_listener keyboard_focus_listener;
int32_t x, y;
struct wl_grab *grab;
struct wl_grab motion_grab;
uint32_t grab_time;
int32_t grab_x, grab_y;
uint32_t grab_button;
struct wl_listener grab_listener;
};
struct wl_drag_offer {
struct wl_object object;
};
struct wl_drag {
struct wl_resource resource;
struct wl_grab grab;
struct wl_drag_offer drag_offer;
struct wl_surface *source;
struct wl_surface *drag_focus;
struct wl_client *target;
int32_t x, y, sx, sy;
struct wl_array types;
const char *type;
uint32_t pointer_focus_time;
struct wl_listener drag_focus_listener;
};
struct wl_selection_offer {
struct wl_object object;
};
struct wl_selection {
struct wl_resource resource;
struct wl_client *client;
struct wl_input_device *input_device;
struct wl_selection_offer selection_offer;
struct wl_surface *selection_focus;
struct wl_client *target;
struct wl_array types;
struct wl_listener selection_focus_listener;
};
void
wl_client_post_event(struct wl_client *client,
struct wl_object *sender,
uint32_t event, ...);
int
wl_display_set_compositor(struct wl_display *display,
struct wl_compositor *compositor,
const struct wl_compositor_interface *implementation);
void
wl_display_post_frame(struct wl_display *display, uint32_t msecs);
void
wl_client_add_resource(struct wl_client *client,
struct wl_resource *resource);
struct wl_display *
wl_client_get_display(struct wl_client *client);
void
wl_resource_destroy(struct wl_resource *resource, struct wl_client *client);
void
wl_input_device_init(struct wl_input_device *device,
struct wl_compositor *compositor);
void
wl_input_device_set_pointer_focus(struct wl_input_device *device,
struct wl_surface *surface,
uint32_t time,
int32_t x, int32_t y,
int32_t sx, int32_t sy);
void
wl_input_device_set_keyboard_focus(struct wl_input_device *device,
struct wl_surface *surface,
uint32_t time);
void
wl_input_device_end_grab(struct wl_input_device *device, uint32_t time);
void
wl_input_device_start_grab(struct wl_input_device *device,
struct wl_grab *grab,
uint32_t button, uint32_t time);
int
wl_input_device_update_grab(struct wl_input_device *device,
struct wl_grab *grab,
struct wl_surface *surface, uint32_t time);
int
wl_compositor_init(struct wl_compositor *compositor,
const struct wl_compositor_interface *interface,
struct wl_display *display);
#ifdef __cplusplus
}
#endif
#endif

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wayland/wayland-server.pc.in
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prefix=@prefix@
exec_prefix=${prefix}
libdir=${exec_prefix}/lib
includedir=${prefix}/include
Name: Wayland Server
Description: Server side implementation of the Wayland protocol
Version: 0.1
Cflags: -I${includedir}
Libs: -L${libdir} -lwayland-server

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/*
* Copyright © 2008 Kristian Høgsberg
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
* the above copyright notice appear in all copies and that both that copyright
* notice and this permission notice appear in supporting documentation, and
* that the name of the copyright holders not be used in advertising or
* publicity pertaining to distribution of the software without specific,
* written prior permission. The copyright holders make no representations
* about the suitability of this software for any purpose. It is provided "as
* is" without express or implied warranty.
*
* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
* EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
* OF THIS SOFTWARE.
*/
#include <stdlib.h>
#include <stdint.h>
#include <string.h>
#include "wayland-util.h"
WL_EXPORT void
wl_list_init(struct wl_list *list)
{
list->prev = list;
list->next = list;
}
WL_EXPORT void
wl_list_insert(struct wl_list *list, struct wl_list *elm)
{
elm->prev = list;
elm->next = list->next;
list->next = elm;
elm->next->prev = elm;
}
WL_EXPORT void
wl_list_remove(struct wl_list *elm)
{
elm->prev->next = elm->next;
elm->next->prev = elm->prev;
}
WL_EXPORT int
wl_list_length(struct wl_list *list)
{
struct wl_list *e;
int count;
count = 0;
e = list->next;
while (e != list) {
e = e->next;
count++;
}
return count;
}
WL_EXPORT int
wl_list_empty(struct wl_list *list)
{
return list->next == list;
}
WL_EXPORT void
wl_array_init(struct wl_array *array)
{
memset(array, 0, sizeof *array);
}
WL_EXPORT void
wl_array_release(struct wl_array *array)
{
free(array->data);
}
WL_EXPORT void *
wl_array_add(struct wl_array *array, int size)
{
int alloc;
void *data, *p;
if (array->alloc > 0)
alloc = array->alloc;
else
alloc = 16;
while (alloc < array->size + size)
alloc *= 2;
if (array->alloc < alloc) {
if (array->alloc > 0)
data = realloc(array->data, alloc);
else
data = malloc(alloc);
if (data == NULL)
return 0;
array->data = data;
array->alloc = alloc;
}
p = array->data + array->size;
array->size += size;
return p;
}
WL_EXPORT void
wl_array_copy(struct wl_array *array, struct wl_array *source)
{
array->size = 0;
wl_array_add(array, source->size);
memcpy(array->data, source->data, source->size);
}

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/*
* Copyright © 2008 Kristian Høgsberg
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
* the above copyright notice appear in all copies and that both that copyright
* notice and this permission notice appear in supporting documentation, and
* that the name of the copyright holders not be used in advertising or
* publicity pertaining to distribution of the software without specific,
* written prior permission. The copyright holders make no representations
* about the suitability of this software for any purpose. It is provided "as
* is" without express or implied warranty.
*
* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
* EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
* OF THIS SOFTWARE.
*/
#ifndef WAYLAND_UTIL_H
#define WAYLAND_UTIL_H
#ifdef __cplusplus
extern "C" {
#endif
#include <inttypes.h>
/* GCC visibility */
#if defined(__GNUC__) && __GNUC__ >= 4
#define WL_EXPORT __attribute__ ((visibility("default")))
#else
#define WL_EXPORT
#endif
#define ARRAY_LENGTH(a) (sizeof (a) / sizeof (a)[0])
#define ALIGN(n, a) ( ((n) + ((a) - 1)) & ~((a) - 1) )
#define DIV_ROUNDUP(n, a) ( ((n) + ((a) - 1)) / (a) )
#define container_of(ptr, type, member) ({ \
const typeof( ((type *)0)->member ) *__mptr = (ptr); \
(type *)( (char *)__mptr - offsetof(type,member) );})
struct wl_argument {
uint32_t type;
void *data;
};
struct wl_message {
const char *name;
const char *signature;
const void **types;
};
struct wl_interface {
const char *name;
int version;
int method_count;
const struct wl_message *methods;
int event_count;
const struct wl_message *events;
};
struct wl_object {
const struct wl_interface *interface;
void (**implementation)(void);
uint32_t id;
};
struct wl_hash_table;
struct wl_hash_table *wl_hash_table_create(void);
void wl_hash_table_destroy(struct wl_hash_table *ht);
void *wl_hash_table_lookup(struct wl_hash_table *ht, uint32_t hash);
int wl_hash_table_insert(struct wl_hash_table *ht, uint32_t hash, void *data);
void wl_hash_table_remove(struct wl_hash_table *ht, uint32_t hash);
/**
* wl_list - linked list
*
* The list head is of "struct wl_list" type, and must be initialized
* using wl_list_init(). All entries in the list must be of the same
* type. The item type must have a "struct wl_list" member. This
* member will be initialized by wl_list_insert(). There is no need to
* call wl_list_init() on the individual item. To query if the list is
* empty in O(1), use wl_list_empty().
*
* Let's call the list reference "struct wl_list foo_list", the item type as
* "item_t", and the item member as "struct wl_list link". The following code
*
* The following code will initialize a list:
*
* wl_list_init(foo_list);
* wl_list_insert(foo_list, item1); Pushes item1 at the head
* wl_list_insert(foo_list, item2); Pushes item2 at the head
* wl_list_insert(item2, item3); Pushes item3 after item2
*
* The list now looks like [item2, item3, item1]
*
* Will iterate the list in ascending order:
*
* item_t *item;
* wl_list_for_each(item, foo_list, link) {
* Do_something_with_item(item);
* }
*/
struct wl_list {
struct wl_list *prev;
struct wl_list *next;
};
void wl_list_init(struct wl_list *list);
void wl_list_insert(struct wl_list *list, struct wl_list *elm);
void wl_list_remove(struct wl_list *elm);
int wl_list_length(struct wl_list *list);
int wl_list_empty(struct wl_list *list);
#define __container_of(ptr, sample, member) \
(void *)((char *)(ptr) - \
((char *)&(sample)->member - (char *)(sample)))
#define wl_list_for_each(pos, head, member) \
for (pos = 0, pos = __container_of((head)->next, pos, member); \
&pos->member != (head); \
pos = __container_of(pos->member.next, pos, member))
#define wl_list_for_each_safe(pos, tmp, head, member) \
for (pos = 0, tmp = 0, \
pos = __container_of((head)->next, pos, member), \
tmp = __container_of((pos)->member.next, tmp, member); \
&pos->member != (head); \
pos = tmp, \
tmp = __container_of(pos->member.next, tmp, member))
#define wl_list_for_each_reverse(pos, head, member) \
for (pos = 0, pos = __container_of((head)->prev, pos, member); \
&pos->member != (head); \
pos = __container_of(pos->member.prev, pos, member))
struct wl_array {
uint32_t size;
uint32_t alloc;
void *data;
};
void wl_array_init(struct wl_array *array);
void wl_array_release(struct wl_array *array);
void *wl_array_add(struct wl_array *array, int size);
void wl_array_copy(struct wl_array *array, struct wl_array *source);
#ifdef __cplusplus
}
#endif
#endif
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