Bump version to 3.11.4

Update NEWS.
cursor-tracker: Rely on gbm_bo_imports()'s buffer validation
2014-01-16 10:42:11 -05:00 · 2014-01-16 10:18:32 -05:00 · 2014-01-13 13:55:58 -05:00 · 2014-01-13 13:28:38 -05:00 · 2014-01-13 13:08:17 -05:00 · 2014-01-13 11:35:48 -05:00
175 changed files with 6220 additions and 5848 deletions
--- a/.gitignore
+++ b/.gitignore
@@ -81,6 +81,9 @@ src/mutter-plugins.pc
 src/wayland/gtk-shell-protocol.c
 src/wayland/gtk-shell-client-protocol.h
 src/wayland/gtk-shell-server-protocol.h
+src/wayland/xdg-shell-protocol.c
+src/wayland/xdg-shell-client-protocol.h
+src/wayland/xdg-shell-server-protocol.h
 src/wayland/xserver-protocol.c
 src/wayland/xserver-client-protocol.h
 src/wayland/xserver-server-protocol.h
--- a/41
+++ b/41
@@ -1,12 +1,12 @@
-		    GNU GENERAL PUBLIC LICENSE
-		       Version 2, June 1991
+                    GNU GENERAL PUBLIC LICENSE
+                       Version 2, June 1991

- Copyright (C) 1989, 1991 Free Software Foundation, Inc.
-     59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ Copyright (C) 1989, 1991 Free Software Foundation, Inc.,
+ 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 Everyone is permitted to copy and distribute verbatim copies
 of this license document, but changing it is not allowed.

-			    Preamble
+                            Preamble

  The licenses for most software are designed to take away your
 freedom to share and change it.  By contrast, the GNU General Public
@@ -15,7 +15,7 @@ software--to make sure the software is free for all its users.  This
 General Public License applies to most of the Free Software
 Foundation's software and to any other program whose authors commit to
 using it.  (Some other Free Software Foundation software is covered by
-the GNU Library General Public License instead.)  You can apply it to
+the GNU Lesser General Public License instead.)  You can apply it to
 your programs, too.

  When we speak of free software, we are referring to freedom, not
@@ -55,8 +55,8 @@ patent must be licensed for everyone's free use or not licensed at all.

  The precise terms and conditions for copying, distribution and
 modification follow.
-
-		    GNU GENERAL PUBLIC LICENSE
+
+                    GNU GENERAL PUBLIC LICENSE
   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION

  0. This License applies to any program or other work which contains
@@ -110,7 +110,7 @@ above, provided that you also meet all of these conditions:
    License.  (Exception: if the Program itself is interactive but
    does not normally print such an announcement, your work based on
    the Program is not required to print an announcement.)
-
+
 These requirements apply to the modified work as a whole.  If
 identifiable sections of that work are not derived from the Program,
 and can be reasonably considered independent and separate works in
@@ -168,7 +168,7 @@ access to copy from a designated place, then offering equivalent
 access to copy the source code from the same place counts as
 distribution of the source code, even though third parties are not
 compelled to copy the source along with the object code.
-
+
  4. You may not copy, modify, sublicense, or distribute the Program
 except as expressly provided under this License.  Any attempt
 otherwise to copy, modify, sublicense or distribute the Program is
@@ -225,7 +225,7 @@ impose that choice.

 This section is intended to make thoroughly clear what is believed to
 be a consequence of the rest of this License.
-
+
  8. If the distribution and/or use of the Program is restricted in
 certain countries either by patents or by copyrighted interfaces, the
 original copyright holder who places the Program under this License
@@ -255,7 +255,7 @@ make exceptions for this.  Our decision will be guided by the two goals
 of preserving the free status of all derivatives of our free software and
 of promoting the sharing and reuse of software generally.

-			    NO WARRANTY
+                            NO WARRANTY

  11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
 FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW.  EXCEPT WHEN
@@ -277,9 +277,9 @@ YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
 PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
 POSSIBILITY OF SUCH DAMAGES.

-		     END OF TERMS AND CONDITIONS
-
-	    How to Apply These Terms to Your New Programs
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs

  If you develop a new program, and you want it to be of the greatest
 possible use to the public, the best way to achieve this is to make it
@@ -303,17 +303,16 @@ the "copyright" line and a pointer to where the full notice is found.
    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
-
+    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.,
+    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

 Also add information on how to contact you by electronic and paper mail.

 If the program is interactive, make it output a short notice like this
 when it starts in an interactive mode:

-    Gnomovision version 69, Copyright (C) year  name of author
+    Gnomovision version 69, Copyright (C) year name of author
    Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
    This is free software, and you are welcome to redistribute it
    under certain conditions; type `show c' for details.
@@ -336,5 +335,5 @@ necessary.  Here is a sample; alter the names:
 This General Public License does not permit incorporating your program into
 proprietary programs.  If your program is a subroutine library, you may
 consider it more useful to permit linking proprietary applications with the
-library.  If this is what you want to do, use the GNU Library General
+library.  If this is what you want to do, use the GNU Lesser General
 Public License instead of this License.
--- a/45
+++ b/45
@@ -1,3 +1,48 @@
+3.11.4
+======
+* Don't leave focus on windows that are being unmanaged [Owen; #711618]
+* Reduce server grabs [Daniel Drake; #721345, #721709]
+* Improve heuristic to determine display output name [Cosimo Cecchi; #721674]
+* Atomically unmaximize both directions [Jasper; #722108]
+* Misc bug fixes [Debarshi, Andika, Florian; #721517, #721674, #722347]
+
+Contributors:
+  Cosimo Cecchi, Daniel Drake, Florian Müllner, Debarshi Ray, Jasper St. Pierre,
+  Andika Triwidada, Owen W. Taylor
+
+3.11.3
+======
+* Fix focus issues with external OSKs[Jasper; #715030]
+* Add a MetaCullable interface [Jasper; #714706]
+* Fix window keybindings [Rui; #719724]
+* Fix settings keyboard/pointer focus for new clients [Rui; #719725]
+* Fix window group paint volume [Owen; #719669]
+* Fix frame extents problems [Owen; #714707]
+* Add shortcut to move windows between monitors [Florian; #671054]
+* Fix problems with focus tracking [Owen; #720558]
+* Misc. bug fixes and cleanups: [Rui, Colin, Lionel, Jasper, Owen; #712833,
+  #719557, #719695, #719833, #678989, #720417, #720630]
+
+Contributors:
+  Lionel Landwerlin, Rui Matos, Alberto Milone, Florian Müllner,
+  Jasper St. Pierre, Rico Tzschichholz, Owen W. Taylor, Colin Walters
+
+3.11.2
+======
+* Support setting a NULL opaque region [Andreas; #711518]
+* Sync keymap from X to wayland [Giovanni; #707446]
+* Implement support for subsurfaces [Jonas; #705502]
+* Don't focus the no-focus-window for globally active windows [Jasper; #710296]
+* Support "hotplug_mode_update" property [Marc-André; #711216]
+* Fix resize operations using mouse-button-modifier [Lionel; #710251]
+* Fix position of attached modals for CSD windows [Giovanni, Owen; #707194]
+* Misc. bug fixes [Rui, Jasper, Neil, Florian; #712247, #711731]
+
+Contributors:
+  Giovanni Campagna, Andreas Heider, Lionel Landwerlin, Marc-André Lureau,
+  Rui Matos, Florian Müllner, Neil Roberts, Sindhu S, Jasper St. Pierre,
+  Rico Tzschichholz, Owen W. Taylor, Jonas Ådahl
+
 3.11.1
 ======
 * Fix tile previews getting stuck on right click during drags [Lionel; #704759]
--- a/configure.ac
+++ b/configure.ac
@@ -3,7 +3,7 @@ AC_CONFIG_MACRO_DIR([m4])

 m4_define([mutter_major_version], [3])
 m4_define([mutter_minor_version], [11])
-m4_define([mutter_micro_version], [1])
+m4_define([mutter_micro_version], [4])

 m4_define([mutter_version],
          [mutter_major_version.mutter_minor_version.mutter_micro_version])
@@ -78,8 +78,8 @@ MUTTER_PC_MODULES="
   cairo >= 1.10.0
   gsettings-desktop-schemas >= 3.7.3
   xcomposite >= 0.2 xfixes xrender xdamage xi >= 1.6.0
-   $CLUTTER_PACKAGE >= 1.15.94
-   cogl-1.0 >= 1.13.3
+   $CLUTTER_PACKAGE >= 1.17.1
+   cogl-1.0 >= 1.17.1
   upower-glib >= 0.99.0
   gnome-desktop-3.0
 "
--- a/doc/reference/Makefile.am
+++ b/doc/reference/Makefile.am
@@ -49,8 +49,8 @@ FIXXREF_OPTIONS=
 # Used for dependencies. The docs will be rebuilt if any of these change.
 # e.g. HFILE_GLOB=$(top_srcdir)/gtk/*.h
 # e.g. CFILE_GLOB=$(top_srcdir)/gtk/*.c
-HFILE_GLOB=$(top_srcdir)/src/*.h
-CFILE_GLOB=$(top_srcdir)/src/*.c
+HFILE_GLOB=$(top_srcdir)/src/*/*.h
+CFILE_GLOB=$(top_srcdir)/src/*/*.c

 # Extra header to include when scanning, which are not under DOC_SOURCE_DIR
 # e.g. EXTRA_HFILES=$(top_srcdir}/contrib/extra.h
--- a/doc/reference/meta-sections.txt
+++ b/doc/reference/meta-sections.txt
@@ -388,6 +388,23 @@ MetaWindowActorPrivate
 meta_window_actor_get_type
 </SECTION>

+<SECTION>
+<FILE>meta-cullable</FILE>
+<TITLE>MetaCullable</TITLE>
+MetaCullable
+MetaCullableInterface
+meta_cullable_cull_out
+meta_cullable_reset_culling
+meta_cullable_cull_out_children
+meta_cullable_reset_culling_children
+<SUBSECTION Standard>
+META_TYPE_CULLABLE
+META_CULLABLE
+META_IS_CULLABLE
+META_CULLABLE_GET_IFACE
+meta_cullable_get_type
+</SECTION>
+
 <SECTION>
 <FILE>prefs</FILE>
 MetaPreference
@@ -541,7 +558,10 @@ meta_window_is_override_redirect
 meta_window_is_skip_taskbar
 meta_window_get_rect
 meta_window_get_input_rect
+meta_window_get_frame_rect
 meta_window_get_outer_rect
+meta_window_client_rect_to_frame_rect
+meta_window_frame_rect_to_client_rect
 meta_window_get_screen
 meta_window_get_display
 meta_window_get_xwindow
--- a/protocol/Makefile.am
+++ b/protocol/Makefile.am
@@ -1 +1,7 @@
-EXTRA_DIST = xserver.xml
+NULL =
+
+EXTRA_DIST = \
+	gtk-shell.xml \
+	xdg-shell.xml \
+	xserver.xml \
+	$(NULL)
--- a/protocol/xdg-shell.xml
+++ b/protocol/xdg-shell.xml
@@ -0,0 +1,438 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<protocol name="xdg_shell">
+
+  <copyright>
+    Copyright © 2008-2013 Kristian Høgsberg
+    Copyright © 2013      Rafael Antognolli
+    Copyright © 2013      Jasper St. Pierre
+    Copyright © 2010-2013 Intel Corporation
+
+    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.
+  </copyright>
+
+  <interface name="xdg_shell" version="1">
+    <description summary="create desktop-style surfaces">
+      This interface is implemented by servers that provide
+      desktop-style user interfaces.
+
+      It allows clients to associate a xdg_surface with
+      a basic surface.
+    </description>
+
+    <enum name="version">
+      <description summary="latest protocol version">
+	Use this enum to check the protocol version, and it will be updated
+	automatically.
+      </description>
+      <entry name="current" value="1" summary="Always the latest version"/>
+    </enum>
+
+
+    <request name="use_unstable_version">
+      <description summary="enable use of this unstable version">
+	Use this request in order to enable use of this interface.
+
+	Understand and agree that one is using an unstable interface,
+	that will likely change in the future, breaking the API.
+      </description>
+      <arg name="version" type="int"/>
+    </request>
+
+    <request name="get_xdg_surface">
+      <description summary="create a shell surface from a surface">
+	Create a shell surface for an existing surface.
+
+	Only one shell or popup surface can be associated with a given
+	surface.
+      </description>
+      <arg name="id" type="new_id" interface="xdg_surface"/>
+      <arg name="surface" type="object" interface="wl_surface"/>
+    </request>
+
+    <request name="get_xdg_popup">
+      <description summary="create a shell surface from a surface">
+	Create a popup surface for an existing surface.
+
+	Only one shell or popup surface can be associated with a given
+	surface.
+      </description>
+      <arg name="id" type="new_id" interface="xdg_popup"/>
+      <arg name="surface" type="object" interface="wl_surface"/>
+      <arg name="parent" type="object" interface="wl_surface"/>
+      <arg name="seat" type="object" interface="wl_seat" summary="the wl_seat whose pointer is used"/>
+      <arg name="serial" type="uint" summary="serial of the implicit grab on the pointer"/>
+      <arg name="x" type="int"/>
+      <arg name="y" type="int"/>
+      <arg name="flags" type="uint"/>
+    </request>
+  </interface>
+
+  <interface name="xdg_surface" version="1">
+
+    <description summary="desktop-style metadata interface">
+      An interface that may be implemented by a wl_surface, for
+      implementations that provide a desktop-style user interface.
+
+      It provides requests to treat surfaces like windows, allowing to set
+      properties like maximized, fullscreen, minimized, and to move and resize
+      them, and associate metadata like title and app id.
+
+      On the server side the object is automatically destroyed when
+      the related wl_surface is destroyed.  On client side,
+      xdg_surface.destroy() must be called before destroying
+      the wl_surface object.
+    </description>
+
+    <request name="destroy" type="destructor">
+      <description summary="remove xdg_surface interface">
+	The xdg_surface interface is removed from the wl_surface object
+	that was turned into a xdg_surface with
+	xdg_shell.get_xdg_surface request. The xdg_surface properties,
+	like maximized and fullscreen, are lost. The wl_surface loses
+	its role as a xdg_surface. The wl_surface is unmapped.
+      </description>
+    </request>
+
+    <request name="set_transient_for">
+      <description summary="surface is a child of another surface">
+	Setting a surface as transient of another means that it is child
+	of another surface.
+
+	Child surfaces are stacked above their parents, and will be
+	unmapped if the parent is unmapped too. They should not appear
+	on task bars and alt+tab.
+      </description>
+      <arg name="parent" type="object" interface="wl_surface" allow-null="true"/>
+    </request>
+
+    <request name="set_title">
+      <description summary="set surface title">
+	Set a short title for the surface.
+
+	This string may be used to identify the surface in a task bar,
+	window list, or other user interface elements provided by the
+	compositor.
+
+	The string must be encoded in UTF-8.
+      </description>
+      <arg name="title" type="string"/>
+    </request>
+
+    <request name="set_app_id">
+      <description summary="set surface class">
+	Set an id for the surface.
+
+	The app id identifies the general class of applications to which
+	the surface belongs.
+
+	It should be the ID that appears in the new desktop entry
+	specification, the interface name.
+      </description>
+      <arg name="app_id" type="string"/>
+    </request>
+
+    <request name="pong">
+      <description summary="respond to a ping event">
+	A client must respond to a ping event with a pong request or
+	the client may be deemed unresponsive.
+      </description>
+      <arg name="serial" type="uint" summary="serial of the ping event"/>
+    </request>
+
+    <event name="ping">
+      <description summary="ping client">
+	Ping a client to check if it is receiving events and sending
+	requests. A client is expected to reply with a pong request.
+      </description>
+      <arg name="serial" type="uint"/>
+    </event>
+
+    <request name="move">
+      <description summary="start an interactive move">
+	Start a pointer-driven move of the surface.
+
+	This request must be used in response to a button press event.
+	The server may ignore move requests depending on the state of
+	the surface (e.g. fullscreen or maximized).
+      </description>
+      <arg name="seat" type="object" interface="wl_seat" summary="the wl_seat whose pointer is used"/>
+      <arg name="serial" type="uint" summary="serial of the implicit grab on the pointer"/>
+    </request>
+
+    <enum name="resize_edge">
+      <description summary="edge values for resizing">
+	These values are used to indicate which edge of a surface
+	is being dragged in a resize operation. The server may
+	use this information to adapt its behavior, e.g. choose
+	an appropriate cursor image.
+      </description>
+      <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">
+      <description summary="start an interactive resize">
+	Start a pointer-driven resizing of the surface.
+
+	This request must be used in response to a button press event.
+	The server may ignore resize requests depending on the state of
+	the surface (e.g. fullscreen or maximized).
+      </description>
+      <arg name="seat" type="object" interface="wl_seat" summary="the wl_seat whose pointer is used"/>
+      <arg name="serial" type="uint" summary="serial of the implicit grab on the pointer"/>
+      <arg name="edges" type="uint" summary="which edge or corner is being dragged"/>
+    </request>
+
+    <event name="configure">
+      <description summary="suggest resize">
+	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 ratio or resize in steps of NxM pixels).
+
+	The edges parameter provides a hint about how the surface
+	was resized. The client may use this information to decide
+	how to adjust its content to the new size (e.g. a scrolling
+	area might adjust its content position to leave the viewable
+	content unmoved). Valid edge values are from resize_edge enum.
+
+	The client is free to dismiss all but the last configure
+	event it received.
+
+	The width and height arguments specify the size of the window
+	in surface local coordinates.
+      </description>
+
+      <arg name="edges" type="uint"/>
+      <arg name="width" type="int"/>
+      <arg name="height" type="int"/>
+    </event>
+
+    <request name="set_output">
+      <description summary="set the default output used by this surface">
+	Set the default output used by this surface when it is first mapped.
+
+	If this value is NULL (default), it's up to the compositor to choose
+	which display will be used to map this surface.
+
+	When fullscreen or maximized state are set on this surface, and it
+	wasn't mapped yet, the output set with this method will be used.
+	Otherwise, the output where the surface is currently mapped will be
+	used.
+      </description>
+      <arg name="output" type="object" interface="wl_output" allow-null="true"/>
+    </request>
+
+    <event name="request_set_fullscreen">
+      <description summary="server requests that the client set fullscreen">
+	Event sent from the compositor to the client requesting that the client
+	goes to a fullscreen state. It's the client job to call set_fullscreen
+	and really trigger the fullscreen state.
+      </description>
+    </event>
+
+    <event name="request_unset_fullscreen">
+      <description summary="server requests that the client unset fullscreen">
+	Event sent from the compositor to the client requesting that the client
+	leaves the fullscreen state. It's the client job to call
+	unset_fullscreen and really leave the fullscreen state.
+      </description>
+    </event>
+
+    <request name="set_fullscreen">
+      <description summary="set the surface state as fullscreen">
+	Set the surface as fullscreen.
+
+	After this request, the compositor should send a configure event
+	informing the output size.
+
+	This request informs the compositor that the next attached buffer
+	committed will be in a fullscreen state. The buffer size should be the
+	same size as the size informed in the configure event, if the client
+	doesn't want to leave any empty area.
+
+	In other words: the next attached buffer after set_maximized is the new
+	maximized buffer. And the surface will be positioned at the maximized
+	position on commit.
+
+	A simple way to synchronize and wait for the correct configure event is
+	to use a wl_display.sync request right after the set_fullscreen
+	request. When the sync callback returns, the last configure event
+	received just before it will be the correct one, and should contain the
+	right size for the surface to maximize.
+
+	Setting one state won't unset another state. Use
+	xdg_surface.unset_fullscreen for unsetting it.
+      </description>
+    </request>
+
+    <request name="unset_fullscreen">
+      <description summary="unset the surface state as fullscreen">
+	Unset the surface fullscreen state.
+
+	Same negotiation as set_fullscreen must be used.
+      </description>
+    </request>
+
+    <event name="request_set_maximized">
+      <description summary="server requests that the client set maximized">
+	Event sent from the compositor to the client requesting that the client
+	goes to a maximized state. It's the client job to call set_maximized
+	and really trigger the maximized state.
+      </description>
+    </event>
+
+    <event name="request_unset_maximized">
+      <description summary="server requests that the client unset maximized">
+	Event sent from the compositor to the client requesting that the client
+	leaves the maximized state. It's the client job to call unset_maximized
+	and really leave the maximized state.
+      </description>
+    </event>
+
+    <request name="set_maximized">
+      <description summary="set the surface state as maximized">
+	Set the surface as maximized.
+
+	After this request, the compositor will send a configure event
+	informing the output size minus panel and other MW decorations.
+
+	This request informs the compositor that the next attached buffer
+	committed will be in a maximized state. The buffer size should be the
+	same size as the size informed in the configure event, if the client
+	doesn't want to leave any empty area.
+
+	In other words: the next attached buffer after set_maximized is the new
+	maximized buffer. And the surface will be positioned at the maximized
+	position on commit.
+
+	A simple way to synchronize and wait for the correct configure event is
+	to use a wl_display.sync request right after the set_maximized request.
+	When the sync callback returns, the last configure event received just
+	before it will be the correct one, and should contain the right size
+	for the surface to maximize.
+
+	Setting one state won't unset another state. Use
+	xdg_surface.unset_maximized for unsetting it.
+      </description>
+    </request>
+
+    <request name="unset_maximized">
+      <description summary="unset the surface state as maximized">
+	Unset the surface maximized state.
+
+	Same negotiation as set_maximized must be used.
+      </description>
+    </request>
+
+    <request name="set_minimized">
+      <description summary="set the surface state as minimized">
+	Set the surface minimized state.
+
+	Setting one state won't unset another state.
+      </description>
+    </request>
+
+    <event name="focused_set">
+      <description summary="surface was focused">
+	The focused_set event is sent when this surface has been
+	activated. Window decorations should be updated accordingly.
+      </description>
+    </event>
+
+    <event name="focused_unset">
+      <description summary="surface was unfocused">
+	The focused_unset event is sent when this surface has been
+	deactivated, because another surface has been activated. Window
+	decorations should be updated accordingly.
+      </description>
+    </event>
+  </interface>
+
+  <interface name="xdg_popup" version="1">
+    <description summary="desktop-style metadata interface">
+      An interface that may be implemented by a wl_surface, for
+      implementations that provide a desktop-style popups/menus. A popup
+      surface is a transient surface with an added pointer grab.
+
+      An existing implicit grab will be changed to owner-events mode,
+      and the popup grab will continue after the implicit grab ends
+      (i.e. releasing the mouse button does not cause the popup to be
+      unmapped).
+
+      The popup grab continues until the window is destroyed or a mouse
+      button is pressed in any other clients window. A click in any of
+      the clients surfaces is reported as normal, however, clicks in
+      other clients surfaces will be discarded and trigger the callback.
+
+      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, in surface local coordinates.
+
+      xdg_popup surfaces are always transient for another surface.
+    </description>
+
+    <request name="destroy" type="destructor">
+      <description summary="remove xdg_surface interface">
+	The xdg_surface interface is removed from the wl_surface object
+	that was turned into a xdg_surface with
+	xdg_shell.get_xdg_surface request. The xdg_surface properties,
+	like maximized and fullscreen, are lost. The wl_surface loses
+	its role as a xdg_surface. The wl_surface is unmapped.
+      </description>
+    </request>
+
+    <request name="pong">
+      <description summary="respond to a ping event">
+	A client must respond to a ping event with a pong request or
+	the client may be deemed unresponsive.
+      </description>
+      <arg name="serial" type="uint" summary="serial of the ping event"/>
+    </request>
+
+    <event name="ping">
+      <description summary="ping client">
+	Ping a client to check if it is receiving events and sending
+	requests. A client is expected to reply with a pong request.
+      </description>
+      <arg name="serial" type="uint"/>
+    </event>
+
+    <event name="popup_done">
+      <description summary="popup interaction is done">
+	The popup_done event is sent out when a popup grab is broken,
+	that is, when the users clicks a surface that doesn't belong
+	to the client owning the popup surface.
+      </description>
+      <arg name="serial" type="uint" summary="serial of the implicit grab on the pointer"/>
+    </event>
+
+  </interface>
+</protocol>
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -43,6 +43,9 @@ mutter_built_sources = \
 	wayland/gtk-shell-protocol.c		\
 	wayland/gtk-shell-server-protocol.h	\
 	wayland/gtk-shell-client-protocol.h	\
+	wayland/xdg-shell-protocol.c		\
+	wayland/xdg-shell-server-protocol.h	\
+	wayland/xdg-shell-client-protocol.h	\
 	wayland/xserver-protocol.c		\
 	wayland/xserver-server-protocol.h	\
 	wayland/xserver-client-protocol.h
@@ -67,7 +70,8 @@ libmutter_wayland_la_SOURCES =			\
 	compositor/meta-background-actor.c	\
 	compositor/meta-background-actor-private.h	\
 	compositor/meta-background-group.c	\
-	compositor/meta-background-group-private.h	\
+	compositor/meta-cullable.c		\
+	compositor/meta-cullable.h		\
 	compositor/meta-module.c		\
 	compositor/meta-module.h		\
 	compositor/meta-plugin.c		\
@@ -77,6 +81,8 @@ libmutter_wayland_la_SOURCES =			\
 	compositor/meta-shadow-factory-private.h	\
 	compositor/meta-shaped-texture.c	\
 	compositor/meta-shaped-texture-private.h 	\
+	compositor/meta-surface-actor.c		\
+	compositor/meta-surface-actor.h		\
 	compositor/meta-texture-rectangle.c	\
 	compositor/meta-texture-rectangle.h	\
 	compositor/meta-texture-tower.c		\
@@ -183,7 +189,9 @@ libmutter_wayland_la_SOURCES =			\
 	ui/theme.c				\
 	meta/theme.h				\
 	ui/theme-private.h			\
-	ui/ui.c					\
+	ui/ui.c
+
+nodist_libmutter_wayland_la_SOURCES =		\
 	$(mutter_built_sources)

 libmutter_wayland_la_SOURCES +=			\
@@ -297,7 +305,7 @@ Meta-$(api_version).gir: libmutter-wayland.la
@META_GIR@_FILES =				\
 	mutter-enum-types.h			\
 	$(libmutterinclude_base_headers)	\
-	$(filter %.c,$(libmutter_wayland_la_SOURCES))
+	$(filter %.c,$(libmutter_wayland_la_SOURCES) $(nodist_libmutter_wayland_la_SOURCES))
@META_GIR@_SCANNERFLAGS = --warn-all --warn-error

 endif
--- a/src/compositor/clutter-utils.c
+++ b/src/compositor/clutter-utils.c
@@ -16,9 +16,7 @@
 * 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.
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
 */

 #include "clutter-utils.h"
@@ -95,8 +93,10 @@ meta_actor_vertices_are_untransformed (ClutterVertex *verts,
      v3x != v1x || v3y != v2y)
    return FALSE;

-  *x_origin = x;
-  *y_origin = y;
+  if (x_origin)
+    *x_origin = x;
+  if (y_origin)
+    *y_origin = y;

  return TRUE;
 }
--- a/src/compositor/clutter-utils.h
+++ b/src/compositor/clutter-utils.h
@@ -15,9 +15,7 @@
 * 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.
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
 */

 #ifndef __META_CLUTTER_UTILS_H__
--- a/src/compositor/cogl-utils.c
+++ b/src/compositor/cogl-utils.c
@@ -16,9 +16,7 @@
 * 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.
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
 */

 #include <clutter/clutter.h>
--- a/src/compositor/cogl-utils.h
+++ b/src/compositor/cogl-utils.h
@@ -15,9 +15,7 @@
 * 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.
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
 */

 #ifndef __META_COGL_UTILS_H__
--- a/src/compositor/compositor-private.h
+++ b/src/compositor/compositor-private.h
@@ -17,8 +17,6 @@ struct _MetaCompositor
 {
  MetaDisplay    *display;

-  Atom            atom_x_root_pixmap;
-  Atom            atom_net_wm_window_opacity;
  guint           repaint_func_id;

  ClutterActor   *shadow_src;
--- a/src/compositor/compositor.c
+++ b/src/compositor/compositor.c
@@ -179,31 +179,6 @@ process_damage (MetaCompositor     *compositor,
  meta_window_actor_process_x11_damage (window_actor, event);
 }

-static void
-process_property_notify (MetaCompositor	*compositor,
-                         XPropertyEvent *event,
-                         MetaWindow     *window)
-{
-  MetaWindowActor *window_actor;
-
-  if (window == NULL)
-    return;
-
-  window_actor = META_WINDOW_ACTOR (meta_window_get_compositor_private (window));
-  if (window_actor == NULL)
-    return;
-
-  /* Check for the opacity changing */
-  if (event->atom == compositor->atom_net_wm_window_opacity)
-    {
-      meta_window_actor_update_opacity (window_actor);
-      DEBUG_TRACE ("process_property_notify: net_wm_window_opacity\n");
-      return;
-    }
-
-  DEBUG_TRACE ("process_property_notify: unknown\n");
-}
-
 static Window
 get_output_window (MetaScreen *screen)
 {
@@ -637,6 +612,9 @@ after_stage_paint (ClutterStage *stage,

  for (l = info->windows; l; l = l->next)
    meta_window_actor_post_paint (l->data);
+
+  if (meta_is_wayland_compositor ())
+    meta_wayland_compositor_paint_finished (meta_wayland_compositor_get_default ());
 }

 static void
@@ -650,11 +628,6 @@ redirect_windows (MetaCompositor *compositor,
  guint        n_retries;
  guint        max_retries;

-  /* If we're running with wayland, connected to a headless xwayland
-   * server then all the windows are implicitly redirected offscreen
-   * already and it would generate an error to try and explicitly
-   * redirect them via XCompositeRedirectSubwindows() */
-
  if (meta_get_replace_current_wm ())
    max_retries = 5;
  else
@@ -792,8 +765,6 @@ meta_compositor_manage_screen (MetaCompositor *compositor,
  clutter_actor_add_child (info->stage, info->window_group);
  clutter_actor_add_child (info->stage, info->top_window_group);

-  info->plugin_mgr = meta_plugin_manager_new (screen);
-
  if (meta_is_wayland_compositor ())
    {
      /* NB: When running as a wayland compositor we don't need an X
@@ -803,13 +774,6 @@ meta_compositor_manage_screen (MetaCompositor *compositor,
    }
  else
    {
-      /*
-       * Delay the creation of the overlay window as long as we can, to avoid
-       * blanking out the screen. This means that during the plugin loading, the
-       * overlay window is not accessible; if the plugin needs to access it
-       * directly, it should hook into the "show" signal on stage, and do
-       * its stuff there.
-       */
      info->output = get_output_window (screen);
      XReparentWindow (xdisplay, xwin, info->output, 0, 0);

@@ -834,9 +798,11 @@ meta_compositor_manage_screen (MetaCompositor *compositor,
       * contents until we show the stage.
       */
      XMapWindow (xdisplay, info->output);
-
-      redirect_windows (compositor, screen);
    }
+
+  redirect_windows (compositor, screen);
+
+  info->plugin_mgr = meta_plugin_manager_new (screen);
 }

 void
@@ -876,7 +842,7 @@ meta_shape_cow_for_window (MetaScreen *screen,
      int width, height;
      MetaRectangle rect;

-      meta_window_get_outer_rect (metaWindow, &rect);
+      meta_window_get_frame_rect (metaWindow, &rect);

      window_bounds.x = rect.x;
      window_bounds.y = rect.y;
@@ -1007,23 +973,30 @@ meta_compositor_window_shape_changed (MetaCompositor *compositor,
  meta_window_actor_update_shape (window_actor);
 }

+void
+meta_compositor_window_opacity_changed (MetaCompositor *compositor,
+                                        MetaWindow     *window)
+{
+  MetaWindowActor *window_actor;
+  window_actor = META_WINDOW_ACTOR (meta_window_get_compositor_private (window));
+  if (!window_actor)
+    return;
+
+  meta_window_actor_update_opacity (window_actor);
+}
+
 /* Clutter makes the assumption that there is only one X window
 * per stage, which is a valid assumption to make for a generic
 * application toolkit. As such, it will ignore any events sent
 * to the a stage that isn't its X window.
 *
- * When a user clicks on what she thinks is the wallpaper, she
- * is actually clicking on the guard window, which is an entirely
- * separate top-level override-redirect window in the hierarchy.
- * We want to recieve events on this guard window so that users
- * can right-click on the background actor. We do this by telling
- * Clutter a little white lie, by transforming clicks on the guard
- * window to become clicks on the stage window, allowing Clutter
- * to process the event normally.
+ * When running as an X window manager, we need to respond to
+ * events from lots of windows. Trick Clutter into translating
+ * these events by pretending we got an event on the stage window.
 */
 static void
-maybe_spoof_guard_window_event_as_stage_event (MetaCompScreen *info,
-                                               XEvent         *event)
+maybe_spoof_event_as_stage_event (MetaCompScreen *info,
+                                  XEvent         *event)
 {
  MetaDisplay *display = meta_screen_get_display (info->screen);

@@ -1032,19 +1005,22 @@ maybe_spoof_guard_window_event_as_stage_event (MetaCompScreen *info,
    {
      XIEvent *input_event = (XIEvent *) event->xcookie.data;

-      /* Only care about pointer events for now. */
      switch (input_event->evtype)
        {
        case XI_Motion:
        case XI_ButtonPress:
        case XI_ButtonRelease:
+        case XI_KeyPress:
+        case XI_KeyRelease:
          {
            XIDeviceEvent *device_event = ((XIDeviceEvent *) input_event);
-            if (device_event->event == info->screen->guard_window)
-              {
-                Window xwin = clutter_x11_get_stage_window (CLUTTER_STAGE (info->stage));
-                device_event->event = xwin;
-              }
+
+            /* If this is a GTK+ widget, like a window menu, let GTK+ handle
+             * it as-is without mangling. */
+            if (meta_ui_window_is_widget (info->screen->ui, device_event->event))
+              break;
+
+            device_event->event = clutter_x11_get_stage_window (CLUTTER_STAGE (info->stage));
          }
          break;
        default:
@@ -1101,7 +1077,7 @@ meta_compositor_process_event (MetaCompositor *compositor,

 	  info = meta_screen_get_compositor_data (screen);

-          maybe_spoof_guard_window_event_as_stage_event (info, event);
+          maybe_spoof_event_as_stage_event (info, event);

 	  if (meta_plugin_manager_xevent_filter (info->plugin_mgr, event))
 	    {
@@ -1113,29 +1089,20 @@ meta_compositor_process_event (MetaCompositor *compositor,
 	}
    }

-  switch (event->type)
+  if (!meta_is_wayland_compositor () &&
+      event->type == meta_display_get_damage_event_base (compositor->display) + XDamageNotify)
    {
-    case PropertyNotify:
-      process_property_notify (compositor, (XPropertyEvent *) event, window);
-      break;
-
-    default:
-      if (!meta_is_wayland_compositor () &&
-          event->type == meta_display_get_damage_event_base (compositor->display) + XDamageNotify)
+      /* Core code doesn't handle damage events, so we need to extract the MetaWindow
+       * ourselves
+       */
+      if (window == NULL)
        {
-          /* Core code doesn't handle damage events, so we need to extract the MetaWindow
-           * ourselves
-           */
-          if (window == NULL)
-            {
-              Window xwin = ((XDamageNotifyEvent *) event)->drawable;
-              window = meta_display_lookup_x_window (compositor->display, xwin);
-            }
-
-	  DEBUG_TRACE ("meta_compositor_process_event (process_damage)\n");
-          process_damage (compositor, (XDamageNotifyEvent *) event, window);
+          Window xwin = ((XDamageNotifyEvent *) event)->drawable;
+          window = meta_display_lookup_x_window (compositor->display, xwin);
        }
-      break;
+
+      DEBUG_TRACE ("meta_compositor_process_event (process_damage)\n");
+      process_damage (compositor, (XDamageNotifyEvent *) event, window);
    }

  /* Clutter needs to know about MapNotify events otherwise it will
@@ -1660,13 +1627,7 @@ on_shadow_factory_changed (MetaShadowFactory *factory,
 MetaCompositor *
 meta_compositor_new (MetaDisplay *display)
 {
-  char *atom_names[] = {
-    "_XROOTPMAP_ID",
-    "_NET_WM_WINDOW_OPACITY",
-  };
-  Atom                   atoms[G_N_ELEMENTS(atom_names)];
  MetaCompositor        *compositor;
-  Display               *xdisplay = meta_display_get_xdisplay (display);

  if (!composite_at_least_version (display, 0, 3))
    return NULL;
@@ -1678,18 +1639,11 @@ meta_compositor_new (MetaDisplay *display)
  if (g_getenv("META_DISABLE_MIPMAPS"))
    compositor->no_mipmaps = TRUE;

-  meta_verbose ("Creating %d atoms\n", (int) G_N_ELEMENTS (atom_names));
-  XInternAtoms (xdisplay, atom_names, G_N_ELEMENTS (atom_names),
-                False, atoms);
-
  g_signal_connect (meta_shadow_factory_get_default (),
                    "changed",
                    G_CALLBACK (on_shadow_factory_changed),
                    compositor);

-  compositor->atom_x_root_pixmap = atoms[0];
-  compositor->atom_net_wm_window_opacity = atoms[1];
-
  compositor->repaint_func_id = clutter_threads_add_repaint_func (meta_repaint_func,
                                                                  compositor,
                                                                  NULL);
--- a/src/compositor/meta-background-actor-private.h
+++ b/src/compositor/meta-background-actor-private.h
@@ -6,9 +6,6 @@
 #include <meta/screen.h>
 #include <meta/meta-background-actor.h>

-void meta_background_actor_set_clip_region  (MetaBackgroundActor *self,
-                                             cairo_region_t      *clip_region);
-
 cairo_region_t *meta_background_actor_get_clip_region (MetaBackgroundActor *self);

 #endif /* META_BACKGROUND_ACTOR_PRIVATE_H */
--- a/src/compositor/meta-background-actor.c
+++ b/src/compositor/meta-background-actor.c
@@ -14,9 +14,7 @@
 * 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.
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
 *
 * Portions adapted from gnome-shell/src/shell-global.c
 */
@@ -41,20 +39,35 @@
 #include <meta/errors.h>
 #include <meta/meta-background.h>
 #include "meta-background-actor-private.h"
+#include "meta-cullable.h"

 struct _MetaBackgroundActorPrivate
 {
  cairo_region_t *clip_region;
 };

-G_DEFINE_TYPE (MetaBackgroundActor, meta_background_actor, CLUTTER_TYPE_ACTOR);
+static void cullable_iface_init (MetaCullableInterface *iface);
+
+G_DEFINE_TYPE_WITH_CODE (MetaBackgroundActor, meta_background_actor, CLUTTER_TYPE_ACTOR,
+                         G_IMPLEMENT_INTERFACE (META_TYPE_CULLABLE, cullable_iface_init));
+
+static void
+set_clip_region (MetaBackgroundActor *self,
+                 cairo_region_t      *clip_region)
+{
+  MetaBackgroundActorPrivate *priv = self->priv;
+
+  g_clear_pointer (&priv->clip_region, (GDestroyNotify) cairo_region_destroy);
+  if (clip_region)
+    priv->clip_region = cairo_region_copy (clip_region);
+}

 static void
 meta_background_actor_dispose (GObject *object)
 {
  MetaBackgroundActor *self = META_BACKGROUND_ACTOR (object);

-  meta_background_actor_set_clip_region (self, NULL);
+  set_clip_region (self, NULL);

  G_OBJECT_CLASS (meta_background_actor_parent_class)->dispose (object);
 }
@@ -104,26 +117,6 @@ meta_background_actor_get_preferred_height (ClutterActor *actor,
    *natural_height_p = height;
 }

-static gboolean
-meta_background_actor_get_paint_volume (ClutterActor       *actor,
-                                        ClutterPaintVolume *volume)
-{
-  ClutterContent *content;
-  gfloat width, height;
-
-  content = clutter_actor_get_content (actor);
-
-  if (!content)
-    return FALSE;
-
-  clutter_content_get_preferred_size (content, &width, &height);
-
-  clutter_paint_volume_set_width (volume, width);
-  clutter_paint_volume_set_height (volume, height);
-
-  return TRUE;
-}
-
 static void
 meta_background_actor_class_init (MetaBackgroundActorClass *klass)
 {
@@ -136,7 +129,6 @@ meta_background_actor_class_init (MetaBackgroundActorClass *klass)

  actor_class->get_preferred_width = meta_background_actor_get_preferred_width;
  actor_class->get_preferred_height = meta_background_actor_get_preferred_height;
-  actor_class->get_paint_volume = meta_background_actor_get_paint_volume;
 }

 static void
@@ -166,31 +158,27 @@ meta_background_actor_new (void)
  return CLUTTER_ACTOR (self);
 }

-/**
- * meta_background_actor_set_clip_region:
- * @self: a #MetaBackgroundActor
- * @clip_region: (allow-none): the area of the actor (in allocate-relative
- *   coordinates) that is visible.
- *
- * Sets the area of the background that is unobscured by overlapping windows.
- * This is used to optimize and only paint the visible portions.
- */
-void
-meta_background_actor_set_clip_region (MetaBackgroundActor *self,
-                                       cairo_region_t      *clip_region)
+static void
+meta_background_actor_cull_out (MetaCullable   *cullable,
+                                cairo_region_t *unobscured_region,
+                                cairo_region_t *clip_region)
 {
-  MetaBackgroundActorPrivate *priv;
+  MetaBackgroundActor *self = META_BACKGROUND_ACTOR (cullable);
+  set_clip_region (self, clip_region);
+}

-  g_return_if_fail (META_IS_BACKGROUND_ACTOR (self));
+static void
+meta_background_actor_reset_culling (MetaCullable *cullable)
+{
+  MetaBackgroundActor *self = META_BACKGROUND_ACTOR (cullable);
+  set_clip_region (self, NULL);
+}

-  priv = self->priv;
-
-  g_clear_pointer (&priv->clip_region,
-                   (GDestroyNotify)
-                   cairo_region_destroy);
-
-  if (clip_region)
-    priv->clip_region = cairo_region_copy (clip_region);
+static void
+cullable_iface_init (MetaCullableInterface *iface)
+{
+  iface->cull_out = meta_background_actor_cull_out;
+  iface->reset_culling = meta_background_actor_reset_culling;
 }

 /**
--- a/src/compositor/meta-background-group-private.h
+++ b/src/compositor/meta-background-group-private.h
@@ -1,11 +0,0 @@
-/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
-
-#ifndef META_BACKGROUND_GROUP_PRIVATE_H
-#define META_BACKGROUND_GROUP_PRIVATE_H
-
-#include <meta/screen.h>
-#include <meta/meta-background-group.h>
-
-void meta_background_group_set_clip_region  (MetaBackgroundGroup *self,
-                                             cairo_region_t      *visible_region);
-#endif /* META_BACKGROUND_GROUP_PRIVATE_H */
--- a/src/compositor/meta-background-group.c
+++ b/src/compositor/meta-background-group.c
@@ -16,87 +16,43 @@

 #include <config.h>

-#include "compositor-private.h"
-#include "clutter-utils.h"
-#include "meta-background-actor-private.h"
-#include "meta-background-group-private.h"
+#include <meta/meta-background-group.h>
+#include "meta-cullable.h"

-G_DEFINE_TYPE (MetaBackgroundGroup, meta_background_group, CLUTTER_TYPE_ACTOR);
+static void cullable_iface_init (MetaCullableInterface *iface);

-struct _MetaBackgroundGroupPrivate
-{
-  gpointer dummy;
-};
-
-static void
-meta_background_group_dispose (GObject *object)
-{
-  G_OBJECT_CLASS (meta_background_group_parent_class)->dispose (object);
-}
-
-static gboolean
-meta_background_group_get_paint_volume (ClutterActor       *actor,
-                                        ClutterPaintVolume *volume)
-{
-  return clutter_paint_volume_set_from_allocation (volume, actor);
-}
+G_DEFINE_TYPE_WITH_CODE (MetaBackgroundGroup, meta_background_group, CLUTTER_TYPE_ACTOR,
+                         G_IMPLEMENT_INTERFACE (META_TYPE_CULLABLE, cullable_iface_init));

 static void
 meta_background_group_class_init (MetaBackgroundGroupClass *klass)
 {
-  GObjectClass *object_class = G_OBJECT_CLASS (klass);
-  ClutterActorClass *actor_class = CLUTTER_ACTOR_CLASS (klass);
+}

-  actor_class->get_paint_volume = meta_background_group_get_paint_volume;
-  object_class->dispose = meta_background_group_dispose;
+static void
+meta_background_group_cull_out (MetaCullable   *cullable,
+                                cairo_region_t *unobscured_region,
+                                cairo_region_t *clip_region)
+{
+  meta_cullable_cull_out_children (cullable, unobscured_region, clip_region);
+}

-  g_type_class_add_private (klass, sizeof (MetaBackgroundGroupPrivate));
+static void
+meta_background_group_reset_culling (MetaCullable *cullable)
+{
+  meta_cullable_reset_culling_children (cullable);
+}
+
+static void
+cullable_iface_init (MetaCullableInterface *iface)
+{
+  iface->cull_out = meta_background_group_cull_out;
+  iface->reset_culling = meta_background_group_reset_culling;
 }

 static void
 meta_background_group_init (MetaBackgroundGroup *self)
 {
-  self->priv = G_TYPE_INSTANCE_GET_PRIVATE (self,
-                                            META_TYPE_BACKGROUND_GROUP,
-                                            MetaBackgroundGroupPrivate);
-}
-
-/**
- * meta_background_group_set_clip_region:
- * @self: a #MetaBackgroundGroup
- * @region: (allow-none): the parts of the background to paint
- *
- * Sets the area of the backgrounds that is unobscured by overlapping windows.
- * This is used to optimize and only paint the visible portions.
- */
-void
-meta_background_group_set_clip_region (MetaBackgroundGroup *self,
-                                       cairo_region_t      *region)
-{
-  GList *children, *l;
-
-  children = clutter_actor_get_children (CLUTTER_ACTOR (self));
-  for (l = children; l; l = l->next)
-    {
-      ClutterActor *actor = l->data;
-
-      if (META_IS_BACKGROUND_ACTOR (actor))
-        {
-          meta_background_actor_set_clip_region (META_BACKGROUND_ACTOR (actor), region);
-        }
-      else if (META_IS_BACKGROUND_GROUP (actor))
-        {
-          int x, y;
-
-          if (!meta_actor_is_untransformed (actor, &x, &y))
-            continue;
-
-          cairo_region_translate (region, -x, -y);
-          meta_background_group_set_clip_region (META_BACKGROUND_GROUP (actor), region);
-          cairo_region_translate (region, x, y);
-        }
-    }
-  g_list_free (children);
 }

 ClutterActor *
--- a/src/compositor/meta-background.c
+++ b/src/compositor/meta-background.c
@@ -14,9 +14,7 @@
 * 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.
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
 */

 /**
--- a/src/compositor/meta-cullable.c
+++ b/src/compositor/meta-cullable.c
@@ -0,0 +1,191 @@
+/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
+/*
+ * Copyright (C) 2013 Red Hat
+ *
+ * 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, see <http://www.gnu.org/licenses/>.
+ *
+ * Written by:
+ *     Owen Taylor <otaylor@redhat.com>
+ *     Ray Strode <rstrode@redhat.com>
+ *     Jasper St. Pierre <jstpierre@mecheye.net>
+ */
+
+#include "config.h"
+#include "meta-cullable.h"
+#include "clutter-utils.h"
+
+G_DEFINE_INTERFACE (MetaCullable, meta_cullable, CLUTTER_TYPE_ACTOR);
+
+/**
+ * SECTION:meta-cullable
+ * @title: MetaCullable
+ * @short_description: CPU culling operations for efficient drawing
+ *
+ * When we are painting a stack of 5-10 large actors, the standard
+ * bottom-to-top method of drawing every actor results in a tremendous
+ * amount of overdraw. If these actors are painting textures like
+ * windows, it can easily max out the available memory bandwidth on a
+ * low-end graphics chipset. It's even worse if window textures are
+ * being accessed over the AGP bus.
+ *
+ * #MetaCullable is our solution. The basic technique applied here is to
+ * do a pre-pass before painting where we walk each actor from top to bottom
+ * and ask each actor to "cull itself out". We pass in a region it can copy
+ * to clip its drawing to, and the actor can subtract its fully opaque pixels
+ * so that actors underneath know not to draw there as well.
+ */
+
+/**
+ * meta_cullable_cull_out_children:
+ * @cullable: The #MetaCullable
+ * @unobscured_region: The unobscured region, as passed into cull_out()
+ * @clip_region: The clip region, as passed into cull_out()
+ *
+ * This is a helper method for actors that want to recurse over their
+ * child actors, and cull them out.
+ *
+ * See #MetaCullable and meta_cullable_cull_out() for more details.
+ */
+void
+meta_cullable_cull_out_children (MetaCullable   *cullable,
+                                 cairo_region_t *unobscured_region,
+                                 cairo_region_t *clip_region)
+{
+  ClutterActor *actor = CLUTTER_ACTOR (cullable);
+  ClutterActor *child;
+  ClutterActorIter iter;
+
+  clutter_actor_iter_init (&iter, actor);
+  while (clutter_actor_iter_prev (&iter, &child))
+    {
+      float x, y;
+
+      if (!CLUTTER_ACTOR_IS_VISIBLE (child))
+        continue;
+
+      /* If an actor has effects applied, then that can change the area
+       * it paints and the opacity, so we no longer can figure out what
+       * portion of the actor is obscured and what portion of the screen
+       * it obscures, so we skip the actor.
+       *
+       * This has a secondary beneficial effect: if a ClutterOffscreenEffect
+       * is applied to an actor, then our clipped redraws interfere with the
+       * caching of the FBO - even if we only need to draw a small portion
+       * of the window right now, ClutterOffscreenEffect may use other portions
+       * of the FBO later. So, skipping actors with effects applied also
+       * prevents these bugs.
+       *
+       * Theoretically, we should check clutter_actor_get_offscreen_redirect()
+       * as well for the same reason, but omitted for simplicity in the
+       * hopes that no-one will do that.
+       */
+      if (clutter_actor_has_effects (child))
+        continue;
+
+      if (!META_IS_CULLABLE (child))
+        continue;
+
+      if (!meta_actor_is_untransformed (child, NULL, NULL))
+        continue;
+
+      clutter_actor_get_position (child, &x, &y);
+
+      /* Temporarily move to the coordinate system of the actor */
+      cairo_region_translate (unobscured_region, - x, - y);
+      cairo_region_translate (clip_region, - x, - y);
+
+      meta_cullable_cull_out (META_CULLABLE (child), unobscured_region, clip_region);
+
+      cairo_region_translate (unobscured_region, x, y);
+      cairo_region_translate (clip_region, x, y);
+    }
+}
+
+/**
+ * meta_cullable_reset_culling_children:
+ * @cullable: The #MetaCullable
+ *
+ * This is a helper method for actors that want to recurse over their
+ * child actors, and cull them out.
+ *
+ * See #MetaCullable and meta_cullable_reset_culling() for more details.
+ */
+void
+meta_cullable_reset_culling_children (MetaCullable *cullable)
+{
+  ClutterActor *actor = CLUTTER_ACTOR (cullable);
+  ClutterActor *child;
+  ClutterActorIter iter;
+
+  clutter_actor_iter_init (&iter, actor);
+  while (clutter_actor_iter_next (&iter, &child))
+    {
+      if (!META_IS_CULLABLE (child))
+        continue;
+
+      meta_cullable_reset_culling (META_CULLABLE (child));
+    }
+}
+
+static void
+meta_cullable_default_init (MetaCullableInterface *iface)
+{
+}
+
+/**
+ * meta_cullable_cull_out:
+ * @cullable: The #MetaCullable
+ * @unobscured_region: The unobscured region, in @cullable's space.
+ * @clip_region: The clip region, in @cullable's space.
+ *
+ * When #MetaWindowGroup is painted, we walk over its direct cullable
+ * children from top to bottom and ask themselves to "cull out". Cullables
+ * can use @unobscured_region and @clip_region to clip their drawing. Actors
+ * interested in eliminating overdraw should copy the @clip_region and only
+ * paint those parts, as everything else has been obscured by actors above it.
+ *
+ * Actors that may have fully opaque parts should also subtract out a region
+ * that is fully opaque from @unobscured_region and @clip_region.
+ *
+ * @unobscured_region and @clip_region are extremely similar. The difference
+ * is that @clip_region starts off with the stage's clip, if Clutter detects
+ * that we're doing a clipped redraw. @unobscured_region, however, starts off
+ * with the full stage size, so actors that may want to record what parts of
+ * their window are unobscured for e.g. scheduling repaints can do so.
+ *
+ * Actors that have children can also use the meta_cullable_cull_out_children()
+ * helper method to do a simple cull across all their children.
+ */
+void
+meta_cullable_cull_out (MetaCullable   *cullable,
+                        cairo_region_t *unobscured_region,
+                        cairo_region_t *clip_region)
+{
+  META_CULLABLE_GET_IFACE (cullable)->cull_out (cullable, unobscured_region, clip_region);
+}
+
+/**
+ * meta_cullable_reset_culling:
+ * @cullable: The #MetaCullable
+ *
+ * Actors that copied data in their cull_out() implementation can now
+ * reset their data, as the paint is now over. Additional paints may be
+ * done by #ClutterClone or similar, and they should not be affected by
+ * the culling operation.
+ */
+void
+meta_cullable_reset_culling (MetaCullable *cullable)
+{
+  META_CULLABLE_GET_IFACE (cullable)->reset_culling (cullable);
+}
--- a/src/compositor/meta-cullable.h
+++ b/src/compositor/meta-cullable.h
@@ -0,0 +1,66 @@
+/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
+
+/*
+ * Copyright (C) 2013 Red Hat
+ *
+ * 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, see <http://www.gnu.org/licenses/>.
+ *
+ * Written by:
+ *     Owen Taylor <otaylor@redhat.com>
+ *     Ray Strode <rstrode@redhat.com>
+ *     Jasper St. Pierre <jstpierre@mecheye.net>
+ */
+
+#ifndef __META_CULLABLE_H__
+#define __META_CULLABLE_H__
+
+#include <clutter/clutter.h>
+
+G_BEGIN_DECLS
+
+#define META_TYPE_CULLABLE             (meta_cullable_get_type ())
+#define META_CULLABLE(obj)             (G_TYPE_CHECK_INSTANCE_CAST ((obj), META_TYPE_CULLABLE, MetaCullable))
+#define META_IS_CULLABLE(obj)          (G_TYPE_CHECK_INSTANCE_TYPE ((obj), META_TYPE_CULLABLE))
+#define META_CULLABLE_GET_IFACE(obj)   (G_TYPE_INSTANCE_GET_INTERFACE ((obj),  META_TYPE_CULLABLE, MetaCullableInterface))
+
+typedef struct _MetaCullable MetaCullable;
+typedef struct _MetaCullableInterface MetaCullableInterface;
+
+struct _MetaCullableInterface
+{
+  GTypeInterface g_iface;
+
+  void (* cull_out)      (MetaCullable   *cullable,
+                          cairo_region_t *unobscured_region,
+                          cairo_region_t *clip_region);
+  void (* reset_culling) (MetaCullable  *cullable);
+};
+
+GType meta_cullable_get_type (void);
+
+void meta_cullable_cull_out (MetaCullable   *cullable,
+                             cairo_region_t *unobscured_region,
+                             cairo_region_t *clip_region);
+void meta_cullable_reset_culling (MetaCullable *cullable);
+
+/* Utility methods for implementations */
+void meta_cullable_cull_out_children (MetaCullable   *cullable,
+                                      cairo_region_t *unobscured_region,
+                                      cairo_region_t *clip_region);
+void meta_cullable_reset_culling_children (MetaCullable *cullable);
+
+G_END_DECLS
+
+#endif /* __META_CULLABLE_H__ */
+
--- a/src/compositor/meta-module.c
+++ b/src/compositor/meta-module.c
@@ -16,9 +16,7 @@
 * 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.
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
 */

 #include <meta/meta-plugin.h>
--- a/src/compositor/meta-module.h
+++ b/src/compositor/meta-module.h
@@ -16,9 +16,7 @@
 * 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.
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
 */

 #ifndef META_MODULE_H_
--- a/src/compositor/meta-plugin-manager.c
+++ b/src/compositor/meta-plugin-manager.c
@@ -16,9 +16,7 @@
 * 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.
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
 */

 #include "config.h"
--- a/src/compositor/meta-plugin-manager.h
+++ b/src/compositor/meta-plugin-manager.h
@@ -16,9 +16,7 @@
 * 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.
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
 */

 #ifndef META_PLUGIN_MANAGER_H_
--- a/src/compositor/meta-plugin.c
+++ b/src/compositor/meta-plugin.c
@@ -16,9 +16,7 @@
 * 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.
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
 */

 /**
--- a/src/compositor/meta-shadow-factory-private.h
+++ b/src/compositor/meta-shadow-factory-private.h
@@ -17,9 +17,7 @@
 * 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.
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
 */

 #ifndef __META_SHADOW_FACTORY_PRIVATE_H__
--- a/src/compositor/meta-shadow-factory.c
+++ b/src/compositor/meta-shadow-factory.c
@@ -13,9 +13,7 @@
 * 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.
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
 */

 /**
--- a/src/compositor/meta-shaped-texture-private.h
+++ b/src/compositor/meta-shaped-texture-private.h
@@ -28,17 +28,9 @@
 #define __META_SHAPED_TEXTURE_PRIVATE_H__

 #include <meta/meta-shaped-texture.h>
-#include "meta-wayland-private.h"

-ClutterActor *meta_shaped_texture_new_with_xwindow (Window xwindow);
-ClutterActor *meta_shaped_texture_new_with_wayland_surface  (MetaWaylandSurface *surface);
-void meta_shaped_texture_set_wayland_surface                (MetaShapedTexture  *stex,
-                                                             MetaWaylandSurface *surface);
-MetaWaylandSurface *meta_shaped_texture_get_wayland_surface (MetaShapedTexture *stex);
-
-void meta_shaped_texture_set_pixmap (MetaShapedTexture *stex,
-                                     Pixmap             pixmap);
-void meta_shaped_texture_attach_wayland_buffer (MetaShapedTexture  *stex,
-                                                MetaWaylandBuffer  *buffer);
+ClutterActor *meta_shaped_texture_new (void);
+void meta_shaped_texture_set_texture (MetaShapedTexture *stex,
+                                      CoglTexture       *texture);

 #endif
--- a/src/compositor/meta-shaped-texture.c
+++ b/src/compositor/meta-shaped-texture.c
@@ -16,9 +16,7 @@
 * 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.
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
 */

 /**
@@ -35,13 +33,11 @@
 #include "meta-texture-tower.h"

 #include "meta-shaped-texture-private.h"
-#include "meta-wayland-private.h"
-#include <cogl/cogl-wayland-server.h>

 #include <clutter/clutter.h>
 #include <cogl/cogl.h>
-#include <cogl/cogl-texture-pixmap-x11.h>
 #include <gdk/gdk.h> /* for gdk_rectangle_intersect() */
+#include "meta-cullable.h"

 static void meta_shaped_texture_dispose  (GObject    *object);

@@ -61,15 +57,10 @@ static void meta_shaped_texture_get_preferred_height (ClutterActor *self,

 static gboolean meta_shaped_texture_get_paint_volume (ClutterActor *self, ClutterPaintVolume *volume);

-typedef enum _MetaShapedTextureType
-{
-  META_SHAPED_TEXTURE_TYPE_X11_PIXMAP,
-  META_SHAPED_TEXTURE_TYPE_WAYLAND_SURFACE,
-} MetaShapedTextureType;
+static void cullable_iface_init (MetaCullableInterface *iface);

-
-G_DEFINE_TYPE (MetaShapedTexture, meta_shaped_texture,
-               CLUTTER_TYPE_ACTOR);
+G_DEFINE_TYPE_WITH_CODE (MetaShapedTexture, meta_shaped_texture, CLUTTER_TYPE_ACTOR,
+                         G_IMPLEMENT_INTERFACE (META_TYPE_CULLABLE, cullable_iface_init));

 #define META_SHAPED_TEXTURE_GET_PRIVATE(obj) \
  (G_TYPE_INSTANCE_GET_PRIVATE ((obj), META_TYPE_SHAPED_TEXTURE, \
@@ -79,18 +70,7 @@ struct _MetaShapedTexturePrivate
 {
  MetaTextureTower *paint_tower;

-  MetaShapedTextureType type;
-  union {
-    struct {
-      Pixmap pixmap;
-    } x11;
-    struct {
-      MetaWaylandSurface *surface;
-    } wayland;
-  };
-
  CoglTexture *texture;
-
  CoglTexture *mask_texture;

  cairo_region_t *clip_region;
@@ -128,13 +108,22 @@ meta_shaped_texture_init (MetaShapedTexture *self)

  priv->paint_tower = meta_texture_tower_new ();

-  priv->type = META_SHAPED_TEXTURE_TYPE_X11_PIXMAP;
  priv->texture = NULL;
-
  priv->mask_texture = NULL;
  priv->create_mipmaps = TRUE;
 }

+static void
+set_clip_region (MetaShapedTexture *self,
+                 cairo_region_t    *clip_region)
+{
+  MetaShapedTexturePrivate *priv = self->priv;
+
+  g_clear_pointer (&priv->clip_region, (GDestroyNotify) cairo_region_destroy);
+  if (clip_region)
+    priv->clip_region = cairo_region_copy (clip_region);
+}
+
 static void
 meta_shaped_texture_dispose (GObject *object)
 {
@@ -149,7 +138,7 @@ meta_shaped_texture_dispose (GObject *object)
  g_clear_pointer (&priv->opaque_region, cairo_region_destroy);

  meta_shaped_texture_set_mask_texture (self, NULL);
-  meta_shaped_texture_set_clip_region (self, NULL);
+  set_clip_region (self, NULL);

  G_OBJECT_CLASS (meta_shaped_texture_parent_class)->dispose (object);
 }
@@ -220,10 +209,8 @@ paint_clipped_rectangle (CoglFramebuffer       *fb,
  cogl_framebuffer_draw_multitextured_rectangle (fb, pipeline,
                                                 x1, y1, x2, y2,
                                                 &coords[0], 8);
-
 }

-
 static void
 set_cogl_texture (MetaShapedTexture *stex,
                  CoglTexture       *cogl_tex)
@@ -238,10 +225,11 @@ set_cogl_texture (MetaShapedTexture *stex,
  if (priv->texture)
    cogl_object_unref (priv->texture);

-  priv->texture = cogl_object_ref (cogl_tex);
+  priv->texture = cogl_tex;

  if (cogl_tex != NULL)
    {
+      cogl_object_ref (cogl_tex);
      width = cogl_texture_get_width (COGL_TEXTURE (cogl_tex));
      height = cogl_texture_get_height (COGL_TEXTURE (cogl_tex));

@@ -266,6 +254,9 @@ set_cogl_texture (MetaShapedTexture *stex,
   * know how much of the buffer has changed with respect to the
   * previous buffer. We only queue a redraw in response to surface
   * damage. */
+
+  if (priv->create_mipmaps)
+    meta_texture_tower_set_base_texture (priv->paint_tower, cogl_tex);
 }

 static void
@@ -324,15 +315,8 @@ meta_shaped_texture_paint (ClutterActor *actor)

  filter = COGL_PIPELINE_FILTER_LINEAR;

-  if (!clutter_actor_is_in_clone_paint (actor))
-    {
-      int x_origin, y_origin;
-
-      if (meta_actor_is_untransformed (actor,
-                                       &x_origin,
-                                       &y_origin))
-        filter = COGL_PIPELINE_FILTER_NEAREST;
-    }
+  if (!clutter_actor_is_in_clone_paint (actor) && meta_actor_is_untransformed (actor, NULL, NULL))
+    filter = COGL_PIPELINE_FILTER_NEAREST;

  ctx = clutter_backend_get_cogl_context (clutter_get_default_backend ());
  fb = cogl_get_draw_framebuffer ();
@@ -568,48 +552,6 @@ meta_shaped_texture_get_paint_volume (ClutterActor *self,
  return clutter_paint_volume_set_from_allocation (volume, self);
 }

-ClutterActor *
-meta_shaped_texture_new_with_wayland_surface (MetaWaylandSurface *surface)
-{
-  ClutterActor *actor = g_object_new (META_TYPE_SHAPED_TEXTURE, NULL);
-  MetaShapedTexturePrivate *priv = META_SHAPED_TEXTURE (actor)->priv;
-
-  /* XXX: it could probably be better to have a "type" construct-only
-   * property or create wayland/x11 subclasses */
-  priv->type = META_SHAPED_TEXTURE_TYPE_WAYLAND_SURFACE;
-
-  meta_shaped_texture_set_wayland_surface (META_SHAPED_TEXTURE (actor),
-                                           surface);
-
-  return actor;
-}
-
-void
-meta_shaped_texture_set_wayland_surface (MetaShapedTexture *stex,
-                                         MetaWaylandSurface *surface)
-{
-  MetaShapedTexturePrivate *priv = stex->priv;
-
-  priv->wayland.surface = surface;
-
-  if (surface && surface->buffer_ref.buffer)
-    meta_shaped_texture_attach_wayland_buffer (stex,
-                                               surface->buffer_ref.buffer);
-}
-
-MetaWaylandSurface *
-meta_shaped_texture_get_wayland_surface (MetaShapedTexture *stex)
-{
-  MetaShapedTexturePrivate *priv = stex->priv;
-  return priv->wayland.surface;
-}
-
-ClutterActor *
-meta_shaped_texture_new_with_xwindow (Window xwindow)
-{
-  return g_object_new (META_TYPE_SHAPED_TEXTURE, NULL);
-}
-
 void
 meta_shaped_texture_set_create_mipmaps (MetaShapedTexture *stex,
 					gboolean           create_mipmaps)
@@ -652,66 +594,6 @@ meta_shaped_texture_set_mask_texture (MetaShapedTexture *stex,
  clutter_actor_queue_redraw (CLUTTER_ACTOR (stex));
 }

-static void
-wayland_surface_update_area (MetaShapedTexture *stex,
-                             int                x,
-                             int                y,
-                             int                width,
-                             int                height)
-{
-  MetaShapedTexturePrivate *priv;
-  MetaWaylandBuffer *buffer;
-
-  priv = stex->priv;
-
-  g_return_if_fail (priv->type == META_SHAPED_TEXTURE_TYPE_WAYLAND_SURFACE);
-  g_return_if_fail (priv->texture != NULL);
-
-  buffer = priv->wayland.surface->buffer_ref.buffer;
-
-  if (buffer)
-    {
-      struct wl_resource *resource = buffer->resource;
-      struct wl_shm_buffer *shm_buffer = wl_shm_buffer_get (resource);
-
-      if (shm_buffer)
-        {
-          CoglPixelFormat format;
-
-          switch (wl_shm_buffer_get_format (shm_buffer))
-            {
-#if G_BYTE_ORDER == G_BIG_ENDIAN
-            case WL_SHM_FORMAT_ARGB8888:
-              format = COGL_PIXEL_FORMAT_ARGB_8888_PRE;
-              break;
-            case WL_SHM_FORMAT_XRGB8888:
-              format = COGL_PIXEL_FORMAT_ARGB_8888;
-              break;
-#elif G_BYTE_ORDER == G_LITTLE_ENDIAN
-            case WL_SHM_FORMAT_ARGB8888:
-              format = COGL_PIXEL_FORMAT_BGRA_8888_PRE;
-              break;
-            case WL_SHM_FORMAT_XRGB8888:
-              format = COGL_PIXEL_FORMAT_BGRA_8888;
-              break;
-#endif
-            default:
-              g_warn_if_reached ();
-              format = COGL_PIXEL_FORMAT_ARGB_8888;
-            }
-
-          cogl_texture_set_region (priv->texture,
-                                   x, y,
-                                   x, y,
-                                   width, height,
-                                   width, height,
-                                   format,
-                                   wl_shm_buffer_get_stride (shm_buffer),
-                                   wl_shm_buffer_get_data (shm_buffer));
-        }
-    }
-}
-
 static gboolean
 get_clip (MetaShapedTexture *stex,
          int x,
@@ -770,8 +652,8 @@ get_clip (MetaShapedTexture *stex,
 * has a mapped clone)
 *
 * Repairs the damaged area indicated by @x, @y, @width and @height
- * and queues a redraw for the intersection @visibible_region and
- * the damage area. If @visibible_region is %NULL a redraw will always
+ * and queues a redraw for the intersection @unobscured_region and
+ * the damage area. If @unobscured_region is %NULL a redraw will always
 * get queued.
 *
 * Return value: Whether a redraw have been queued or not
@@ -793,17 +675,6 @@ meta_shaped_texture_update_area (MetaShapedTexture *stex,
  if (priv->texture == NULL)
    return FALSE;

-  switch (priv->type)
-    {
-    case META_SHAPED_TEXTURE_TYPE_X11_PIXMAP:
-      cogl_texture_pixmap_x11_update_area (COGL_TEXTURE_PIXMAP_X11 (priv->texture),
-                                           x, y, width, height);
-      break;
-    case META_SHAPED_TEXTURE_TYPE_WAYLAND_SURFACE:
-      wayland_surface_update_area (stex, x, y, width, height);
-      break;
-    }
-
  meta_texture_tower_update_area (priv->paint_tower, x, y, width, height);

  has_clip = get_clip (stex, x, y, width, height, &clip);
@@ -843,66 +714,17 @@ meta_shaped_texture_update_area (MetaShapedTexture *stex,
 }

 /**
- * meta_shaped_texture_set_pixmap:
+ * meta_shaped_texture_set_texture:
 * @stex: The #MetaShapedTexture
- * @pixmap: The pixmap you want the stex to assume
+ * @pixmap: The #CoglTexture to display
 */
 void
-meta_shaped_texture_set_pixmap (MetaShapedTexture *stex,
-                                Pixmap             pixmap)
+meta_shaped_texture_set_texture (MetaShapedTexture *stex,
+                                 CoglTexture       *texture)
 {
-  MetaShapedTexturePrivate *priv;
-
  g_return_if_fail (META_IS_SHAPED_TEXTURE (stex));

-  priv = stex->priv;
-
-  if (priv->x11.pixmap == pixmap)
-    return;
-
-  priv->x11.pixmap = pixmap;
-
-  if (pixmap != None)
-    {
-      CoglContext *ctx =
-        clutter_backend_get_cogl_context (clutter_get_default_backend ());
-      CoglTexture *texture =
-        COGL_TEXTURE (cogl_texture_pixmap_x11_new (ctx, pixmap, FALSE, NULL));
-      set_cogl_texture (stex, texture);
-    }
-  else
-    set_cogl_texture (stex, NULL);
-
-  if (priv->create_mipmaps)
-    meta_texture_tower_set_base_texture (priv->paint_tower,
-                                         COGL_TEXTURE (priv->texture));
-}
-
-void
-meta_shaped_texture_attach_wayland_buffer (MetaShapedTexture  *stex,
-                                           MetaWaylandBuffer  *buffer)
-{
-  MetaShapedTexturePrivate *priv;
-
-  g_return_if_fail (META_IS_SHAPED_TEXTURE (stex));
-
-  priv = stex->priv;
-
-  /* TODO: we should change this api to be something like
-   * meta_shaped_texture_notify_buffer_attach() since we now maintain
-   * a reference to the MetaWaylandSurface where we can access the
-   * buffer without it being explicitly passed as an argument.
-   */
-  g_return_if_fail (priv->wayland.surface->buffer_ref.buffer == buffer);
-
-  if (buffer)
-    set_cogl_texture (stex, buffer->texture);
-  else
-    set_cogl_texture (stex, NULL);
-
-  if (priv->create_mipmaps)
-    meta_texture_tower_set_base_texture (priv->paint_tower,
-                                         COGL_TEXTURE (priv->texture));
+  set_cogl_texture (stex, texture);
 }

 /**
@@ -953,39 +775,6 @@ meta_shaped_texture_set_input_shape_region (MetaShapedTexture *stex,
  clutter_actor_queue_redraw (CLUTTER_ACTOR (stex));
 }

-/**
- * meta_shaped_texture_set_clip_region:
- * @stex: a #MetaShapedTexture
- * @clip_region: the region of the texture that is visible and
- *   should be painted.
- *
- * Provides a hint to the texture about what areas of the texture
- * are not completely obscured and thus need to be painted. This
- * is an optimization and is not supposed to have any effect on
- * the output.
- *
- * Typically a parent container will set the clip region before
- * painting its children, and then unset it afterwards.
- */
-void
-meta_shaped_texture_set_clip_region (MetaShapedTexture *stex,
-				     cairo_region_t    *clip_region)
-{
-  MetaShapedTexturePrivate *priv;
-
-  g_return_if_fail (META_IS_SHAPED_TEXTURE (stex));
-
-  priv = stex->priv;
-
-  if (priv->clip_region)
-    cairo_region_destroy (priv->clip_region);
-
-  if (clip_region)
-    priv->clip_region = cairo_region_copy (clip_region);
-  else
-    priv->clip_region = NULL;
-}
-
 /**
 * meta_shaped_texture_set_opaque_region:
 * @stex: a #MetaShapedTexture
@@ -1113,3 +902,43 @@ meta_shaped_texture_get_image (MetaShapedTexture     *stex,

  return surface;
 }
+
+static void
+meta_shaped_texture_cull_out (MetaCullable   *cullable,
+                              cairo_region_t *unobscured_region,
+                              cairo_region_t *clip_region)
+{
+  MetaShapedTexture *self = META_SHAPED_TEXTURE (cullable);
+  MetaShapedTexturePrivate *priv = self->priv;
+
+  set_clip_region (self, clip_region);
+
+  if (clutter_actor_get_paint_opacity (CLUTTER_ACTOR (self)) == 0xff)
+    {
+      if (priv->opaque_region)
+        {
+          cairo_region_subtract (unobscured_region, priv->opaque_region);
+          cairo_region_subtract (clip_region, priv->opaque_region);
+        }
+    }
+}
+
+static void
+meta_shaped_texture_reset_culling (MetaCullable *cullable)
+{
+  MetaShapedTexture *self = META_SHAPED_TEXTURE (cullable);
+  set_clip_region (self, NULL);
+}
+
+static void
+cullable_iface_init (MetaCullableInterface *iface)
+{
+  iface->cull_out = meta_shaped_texture_cull_out;
+  iface->reset_culling = meta_shaped_texture_reset_culling;
+}
+
+ClutterActor *
+meta_shaped_texture_new (void)
+{
+  return g_object_new (META_TYPE_SHAPED_TEXTURE, NULL);
+}
--- a/src/compositor/meta-surface-actor.c
+++ b/src/compositor/meta-surface-actor.c
@@ -0,0 +1,183 @@
+/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
+
+/**
+ * SECTION:meta-surface-actor
+ * @title: MetaSurfaceActor
+ * @short_description: An actor representing a surface in the scene graph
+ *
+ * A surface can be either a shaped texture, or a group of shaped texture,
+ * used to draw the content of a window.
+ */
+
+#include <config.h>
+#include <clutter/clutter.h>
+#include <cogl/cogl-wayland-server.h>
+#include <cogl/cogl-texture-pixmap-x11.h>
+#include <meta/meta-shaped-texture.h>
+#include "meta-surface-actor.h"
+#include "meta-wayland-private.h"
+#include "meta-cullable.h"
+
+#include "meta-shaped-texture-private.h"
+
+struct _MetaSurfaceActorPrivate
+{
+  MetaShapedTexture *texture;
+  MetaWaylandBuffer *buffer;
+};
+
+static void cullable_iface_init (MetaCullableInterface *iface);
+
+G_DEFINE_TYPE_WITH_CODE (MetaSurfaceActor, meta_surface_actor, CLUTTER_TYPE_ACTOR,
+                         G_IMPLEMENT_INTERFACE (META_TYPE_CULLABLE, cullable_iface_init));
+
+static void
+meta_surface_actor_class_init (MetaSurfaceActorClass *klass)
+{
+  g_type_class_add_private (klass, sizeof (MetaSurfaceActorPrivate));
+}
+
+static void
+meta_surface_actor_cull_out (MetaCullable   *cullable,
+                             cairo_region_t *unobscured_region,
+                             cairo_region_t *clip_region)
+{
+  meta_cullable_cull_out_children (cullable, unobscured_region, clip_region);
+}
+
+static void
+meta_surface_actor_reset_culling (MetaCullable *cullable)
+{
+  meta_cullable_reset_culling_children (cullable);
+}
+
+static void
+cullable_iface_init (MetaCullableInterface *iface)
+{
+  iface->cull_out = meta_surface_actor_cull_out;
+  iface->reset_culling = meta_surface_actor_reset_culling;
+}
+
+static void
+meta_surface_actor_init (MetaSurfaceActor *self)
+{
+  MetaSurfaceActorPrivate *priv;
+
+  priv = self->priv = G_TYPE_INSTANCE_GET_PRIVATE (self,
+                                                   META_TYPE_SURFACE_ACTOR,
+                                                   MetaSurfaceActorPrivate);
+
+  priv->texture = META_SHAPED_TEXTURE (meta_shaped_texture_new ());
+  clutter_actor_add_child (CLUTTER_ACTOR (self), CLUTTER_ACTOR (priv->texture));
+}
+
+cairo_surface_t *
+meta_surface_actor_get_image (MetaSurfaceActor      *self,
+                              cairo_rectangle_int_t *clip)
+{
+  return meta_shaped_texture_get_image (self->priv->texture, clip);
+}
+
+MetaShapedTexture *
+meta_surface_actor_get_texture (MetaSurfaceActor *self)
+{
+  return self->priv->texture;
+}
+
+static void
+update_area (MetaSurfaceActor *self,
+             int x, int y, int width, int height)
+{
+  MetaSurfaceActorPrivate *priv = self->priv;
+
+  if (meta_is_wayland_compositor ())
+    {
+      struct wl_resource *resource = priv->buffer->resource;
+      struct wl_shm_buffer *shm_buffer = wl_shm_buffer_get (resource);
+
+      if (shm_buffer)
+        {
+          CoglTexture2D *texture = COGL_TEXTURE_2D (priv->buffer->texture);
+          cogl_wayland_texture_set_region_from_shm_buffer (texture, x, y, width, height, shm_buffer, x, y, 0, NULL);
+        }
+    }
+  else
+    {
+      CoglTexturePixmapX11 *texture = COGL_TEXTURE_PIXMAP_X11 (meta_shaped_texture_get_texture (priv->texture));
+      cogl_texture_pixmap_x11_update_area (texture, x, y, width, height);
+    }
+}
+
+gboolean
+meta_surface_actor_damage_all (MetaSurfaceActor *self,
+                               cairo_region_t   *unobscured_region)
+{
+  MetaSurfaceActorPrivate *priv = self->priv;
+  CoglTexture *texture = meta_shaped_texture_get_texture (priv->texture);
+
+  update_area (self, 0, 0, cogl_texture_get_width (texture), cogl_texture_get_height (texture));
+  return meta_shaped_texture_update_area (priv->texture,
+                                          0, 0,
+                                          cogl_texture_get_width (texture),
+                                          cogl_texture_get_height (texture),
+                                          unobscured_region);
+}
+
+gboolean
+meta_surface_actor_damage_area (MetaSurfaceActor *self,
+                                int               x,
+                                int               y,
+                                int               width,
+                                int               height,
+                                cairo_region_t   *unobscured_region)
+{
+  MetaSurfaceActorPrivate *priv = self->priv;
+
+  update_area (self, x, y, width, height);
+  return meta_shaped_texture_update_area (priv->texture,
+                                          x, y, width, height,
+                                          unobscured_region);
+}
+
+void
+meta_surface_actor_attach_wayland_buffer (MetaSurfaceActor *self,
+                                          MetaWaylandBuffer *buffer)
+{
+  MetaSurfaceActorPrivate *priv = self->priv;
+  priv->buffer = buffer;
+
+  if (buffer)
+    meta_shaped_texture_set_texture (priv->texture, buffer->texture);
+  else
+    meta_shaped_texture_set_texture (priv->texture, NULL);
+}
+
+void
+meta_surface_actor_set_texture (MetaSurfaceActor *self,
+                                CoglTexture      *texture)
+{
+  MetaSurfaceActorPrivate *priv = self->priv;
+  meta_shaped_texture_set_texture (priv->texture, texture);
+}
+
+void
+meta_surface_actor_set_input_region (MetaSurfaceActor *self,
+                                     cairo_region_t   *region)
+{
+  MetaSurfaceActorPrivate *priv = self->priv;
+  meta_shaped_texture_set_input_shape_region (priv->texture, region);
+}
+
+void
+meta_surface_actor_set_opaque_region (MetaSurfaceActor *self,
+                                      cairo_region_t   *region)
+{
+  MetaSurfaceActorPrivate *priv = self->priv;
+  meta_shaped_texture_set_opaque_region (priv->texture, region);
+}
+
+MetaSurfaceActor *
+meta_surface_actor_new (void)
+{
+  return g_object_new (META_TYPE_SURFACE_ACTOR, NULL);
+}
--- a/src/compositor/meta-surface-actor.h
+++ b/src/compositor/meta-surface-actor.h
@@ -0,0 +1,67 @@
+/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
+
+#ifndef META_SURFACE_ACTOR_PRIVATE_H
+#define META_SURFACE_ACTOR_PRIVATE_H
+
+#include <config.h>
+
+#include <meta/meta-shaped-texture.h>
+#include "meta-wayland-types.h"
+
+G_BEGIN_DECLS
+
+#define META_TYPE_SURFACE_ACTOR            (meta_surface_actor_get_type())
+#define META_SURFACE_ACTOR(obj)            (G_TYPE_CHECK_INSTANCE_CAST ((obj), META_TYPE_SURFACE_ACTOR, MetaSurfaceActor))
+#define META_SURFACE_ACTOR_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST ((klass), META_TYPE_SURFACE_ACTOR, MetaSurfaceActorClass))
+#define META_IS_SURFACE_ACTOR(obj)         (G_TYPE_CHECK_INSTANCE_TYPE ((obj), META_TYPE_SURFACE_ACTOR))
+#define META_IS_SURFACE_ACTOR_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), META_TYPE_SURFACE_ACTOR))
+#define META_SURFACE_ACTOR_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS ((obj), META_TYPE_SURFACE_ACTOR, MetaSurfaceActorClass))
+
+typedef struct _MetaSurfaceActor        MetaSurfaceActor;
+typedef struct _MetaSurfaceActorClass   MetaSurfaceActorClass;
+typedef struct _MetaSurfaceActorPrivate MetaSurfaceActorPrivate;
+
+struct _MetaSurfaceActorClass
+{
+  /*< private >*/
+  ClutterActorClass parent_class;
+};
+
+struct _MetaSurfaceActor
+{
+  ClutterActor            parent;
+
+  MetaSurfaceActorPrivate *priv;
+};
+
+GType meta_surface_actor_get_type (void);
+
+MetaSurfaceActor *meta_surface_actor_new (void);
+
+cairo_surface_t *meta_surface_actor_get_image (MetaSurfaceActor      *self,
+                                               cairo_rectangle_int_t *clip);
+
+MetaShapedTexture *meta_surface_actor_get_texture (MetaSurfaceActor *self);
+
+gboolean meta_surface_actor_damage_all (MetaSurfaceActor *self,
+                                        cairo_region_t   *unobscured_region);
+
+gboolean meta_surface_actor_damage_area (MetaSurfaceActor *self,
+                                         int               x,
+                                         int               y,
+                                         int               width,
+                                         int               height,
+                                         cairo_region_t   *unobscured_region);
+
+void meta_surface_actor_set_texture (MetaSurfaceActor *self,
+                                     CoglTexture      *texture);
+void meta_surface_actor_attach_wayland_buffer (MetaSurfaceActor  *self,
+                                               MetaWaylandBuffer *buffer);
+void meta_surface_actor_set_input_region (MetaSurfaceActor *self,
+                                          cairo_region_t   *region);
+void meta_surface_actor_set_opaque_region (MetaSurfaceActor *self,
+                                           cairo_region_t   *region);
+
+G_END_DECLS
+
+#endif /* META_SURFACE_ACTOR_PRIVATE_H */
--- a/src/compositor/meta-texture-rectangle.c
+++ b/src/compositor/meta-texture-rectangle.c
@@ -18,9 +18,7 @@
 * 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.
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
 */

 #include <config.h>
@@ -28,41 +26,6 @@
 #include <clutter/clutter.h>
 #include "meta-texture-rectangle.h"

-CoglTexture *
-meta_texture_rectangle_new (unsigned int width,
-                            unsigned int height,
-                            CoglPixelFormat format,
-                            CoglPixelFormat internal_format,
-                            unsigned int rowstride,
-                            const guint8 *data,
-                            GError **error)
-{
-  ClutterBackend *backend =
-    clutter_get_default_backend ();
-  CoglContext *context =
-    clutter_backend_get_cogl_context (backend);
-  CoglTextureRectangle *tex_rect;
-
-  tex_rect = cogl_texture_rectangle_new_with_size (context,
-                                                   width, height,
-                                                   internal_format,
-                                                   error);
-  if (tex_rect == NULL)
-    return NULL;
-
-  if (data)
-    cogl_texture_set_region (COGL_TEXTURE (tex_rect),
-                             0, 0, /* src_x/y */
-                             0, 0, /* dst_x/y */
-                             width, height, /* dst_width/height */
-                             width, height, /* width/height */
-                             format,
-                             rowstride,
-                             data);
-
-  return COGL_TEXTURE (tex_rect);
-}
-
 static void
 texture_rectangle_check_cb (CoglTexture *sub_texture,
                            const float *sub_texture_coords,
--- a/src/compositor/meta-texture-rectangle.h
+++ b/src/compositor/meta-texture-rectangle.h
@@ -18,9 +18,7 @@
 * 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.
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
 */

 #ifndef __META_TEXTURE_RECTANGLE_H__
@@ -30,15 +28,6 @@

 G_BEGIN_DECLS

-CoglTexture *
-meta_texture_rectangle_new (unsigned int width,
-                            unsigned int height,
-                            CoglPixelFormat format,
-                            CoglPixelFormat internal_format,
-                            unsigned int rowstride,
-                            const guint8 *data,
-                            GError **error);
-
 gboolean
 meta_texture_rectangle_check (CoglTexture *texture);

--- a/src/compositor/meta-texture-tower.c
+++ b/src/compositor/meta-texture-tower.c
@@ -17,9 +17,7 @@
 * 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.
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
 */

 #include <math.h>
@@ -357,18 +355,10 @@ texture_tower_create_texture (MetaTextureTower *tower,
  if ((!is_power_of_two (width) || !is_power_of_two (height)) &&
      meta_texture_rectangle_check (tower->textures[level - 1]))
    {
-      tower->textures[level] =
-        meta_texture_rectangle_new (width, height,
-                                    /* data format */
-                                    TEXTURE_FORMAT,
-                                    /* internal cogl format */
-                                    TEXTURE_FORMAT,
-                                    /* rowstride */
-                                    width * 4,
-                                    /* data */
-                                    NULL,
-                                    /* error */
-                                    NULL);
+      ClutterBackend *backend = clutter_get_default_backend ();
+      CoglContext *context = clutter_backend_get_cogl_context (backend);
+
+      tower->textures[level] = cogl_texture_rectangle_new_with_size (context, width, height);
    }
  else
    {
--- a/src/compositor/meta-texture-tower.h
+++ b/src/compositor/meta-texture-tower.h
@@ -17,9 +17,7 @@
 * 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.
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
 */

 #ifndef __META_TEXTURE_TOWER_H__
--- a/src/compositor/meta-window-actor-private.h
+++ b/src/compositor/meta-window-actor-private.h
@@ -10,6 +10,7 @@

 #include <X11/extensions/Xdamage.h>
 #include <meta/compositor-mutter.h>
+#include "meta-surface-actor.h"

 MetaWindowActor *meta_window_actor_new (MetaWindow *window);

@@ -30,16 +31,6 @@ void meta_window_actor_unmaximize (MetaWindowActor *self,
 void meta_window_actor_process_x11_damage (MetaWindowActor    *self,
                                           XDamageNotifyEvent *event);

-void meta_window_actor_process_wayland_damage (MetaWindowActor *self,
-                                               int              x,
-                                               int              y,
-                                               int              width,
-                                               int              height);
-void meta_window_actor_set_wayland_surface    (MetaWindowActor    *self,
-                                               MetaWaylandSurface *surface);
-void meta_window_actor_attach_wayland_buffer  (MetaWindowActor   *self,
-                                               MetaWaylandBuffer *buffer);
-
 void meta_window_actor_pre_paint      (MetaWindowActor    *self);
 void meta_window_actor_post_paint     (MetaWindowActor    *self);
 void meta_window_actor_frame_complete (MetaWindowActor    *self,
@@ -68,18 +59,12 @@ void     meta_window_actor_set_updates_frozen  (MetaWindowActor *self,
 void     meta_window_actor_queue_frame_drawn   (MetaWindowActor *self,
                                                gboolean         no_delay_frame);

-cairo_region_t *meta_window_actor_get_obscured_region (MetaWindowActor *self);
-
-void meta_window_actor_set_clip_region         (MetaWindowActor *self,
-                                                cairo_region_t  *clip_region);
-void meta_window_actor_set_clip_region_beneath (MetaWindowActor *self,
-                                                cairo_region_t  *beneath_region);
-void meta_window_actor_reset_clip_regions      (MetaWindowActor *self);
-
 void meta_window_actor_set_unobscured_region      (MetaWindowActor *self,
                                                   cairo_region_t  *unobscured_region);

 void meta_window_actor_effect_completed (MetaWindowActor *actor,
                                         gulong           event);

+MetaSurfaceActor *meta_window_actor_get_surface (MetaWindowActor *self);
+
 #endif /* META_WINDOW_ACTOR_PRIVATE_H */
--- a/src/compositor/meta-window-actor.c
+++ b/src/compositor/meta-window-actor.c
@@ -30,10 +30,12 @@
 #include "meta-shaped-texture-private.h"
 #include "meta-shadow-factory-private.h"
 #include "meta-window-actor-private.h"
+#include "meta-surface-actor.h"
 #include "meta-texture-rectangle.h"
 #include "region-utils.h"
 #include "meta-wayland-private.h"
 #include "monitor-private.h"
+#include "meta-cullable.h"

 enum {
  POSITION_CHANGED,
@@ -47,10 +49,9 @@ static guint signals[LAST_SIGNAL] = {0};
 struct _MetaWindowActorPrivate
 {
  MetaWindow       *window;
-  Window            xwindow;
  MetaScreen       *screen;

-  ClutterActor     *actor;
+  MetaSurfaceActor *surface;

  /* MetaShadowFactory only caches shadows that are actually in use;
   * to avoid unnecessary recomputation we do two things: 1) we store
@@ -66,15 +67,8 @@ struct _MetaWindowActorPrivate
  MetaShadow       *focused_shadow;
  MetaShadow       *unfocused_shadow;

-  guint8            opacity;
-
  /* A region that matches the shape of the window, including frame bounds */
  cairo_region_t   *shape_region;
-  /* If the window has an input shape, a region that matches the shape */
-  cairo_region_t   *input_region;
-  /* The opaque region, from _NET_WM_OPAQUE_REGION, intersected with
-   * the shape region. */
-  cairo_region_t   *opaque_region;
  /* The region we should clip to when painting the shadow */
  cairo_region_t   *shadow_clip;

@@ -162,8 +156,6 @@ struct _FrameData
 enum
 {
  PROP_META_WINDOW = 1,
-  PROP_META_SCREEN,
-  PROP_X_WINDOW,
  PROP_NO_SHADOW,
  PROP_SHADOW_CLASS
 };
@@ -199,7 +191,10 @@ static void do_send_frame_timings (MetaWindowActor  *self,
                                   gint             refresh_interval,
                                   gint64           presentation_time);

-G_DEFINE_TYPE (MetaWindowActor, meta_window_actor, CLUTTER_TYPE_ACTOR);
+static void cullable_iface_init (MetaCullableInterface *iface);
+
+G_DEFINE_TYPE_WITH_CODE (MetaWindowActor, meta_window_actor, CLUTTER_TYPE_ACTOR,
+                         G_IMPLEMENT_INTERFACE (META_TYPE_CULLABLE, cullable_iface_init));

 static void
 frame_data_free (FrameData *frame)
@@ -229,33 +224,12 @@ meta_window_actor_class_init (MetaWindowActorClass *klass)
                               "MetaWindow",
                               "The displayed MetaWindow",
                               META_TYPE_WINDOW,
-                               G_PARAM_READWRITE | G_PARAM_CONSTRUCT);
+                               G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY);

  g_object_class_install_property (object_class,
                                   PROP_META_WINDOW,
                                   pspec);

-  pspec = g_param_spec_pointer ("meta-screen",
-				"MetaScreen",
-				"MetaScreen",
-				G_PARAM_READWRITE | G_PARAM_CONSTRUCT);
-
-  g_object_class_install_property (object_class,
-                                   PROP_META_SCREEN,
-                                   pspec);
-
-  pspec = g_param_spec_ulong ("x-window",
-			      "Window",
-			      "Window",
-			      0,
-			      G_MAXULONG,
-			      0,
-			      G_PARAM_READWRITE | G_PARAM_CONSTRUCT);
-
-  g_object_class_install_property (object_class,
-                                   PROP_X_WINDOW,
-                                   pspec);
-
  pspec = g_param_spec_boolean ("no-shadow",
                                "No shadow",
                                "Do not add shaddow to this window",
@@ -298,7 +272,6 @@ meta_window_actor_init (MetaWindowActor *self)
  priv = self->priv = G_TYPE_INSTANCE_GET_PRIVATE (self,
 						   META_TYPE_WINDOW_ACTOR,
 						   MetaWindowActorPrivate);
-  priv->opacity = 0xff;
  priv->shadow_class = NULL;
 }

@@ -309,11 +282,9 @@ window_decorated_notify (MetaWindow *mw,
 {
  MetaWindowActor        *self     = META_WINDOW_ACTOR (data);
  MetaWindowActorPrivate *priv     = self->priv;
-  MetaFrame              *frame    = meta_window_get_frame (mw);
  MetaScreen             *screen   = priv->screen;
  MetaDisplay            *display  = meta_screen_get_display (screen);
  Display                *xdisplay = meta_display_get_xdisplay (display);
-  Window                  new_xwindow;

  /*
   * Basically, we have to reconstruct the the internals of this object
@@ -321,11 +292,6 @@ window_decorated_notify (MetaWindow *mw,
   */
  priv->redecorating = TRUE;

-  if (frame)
-    new_xwindow = meta_frame_get_xwindow (frame);
-  else
-    new_xwindow = meta_window_get_xwindow (mw);
-
  if (!meta_is_wayland_compositor ())
    {
      meta_window_actor_detach_x11_pixmap (self);
@@ -343,8 +309,6 @@ window_decorated_notify (MetaWindow *mw,
        }
    }

-  priv->xwindow = new_xwindow;
-
  /*
   * Recreate the contents.
   */
@@ -359,17 +323,40 @@ window_appears_focused_notify (MetaWindow *mw,
  clutter_actor_queue_redraw (CLUTTER_ACTOR (data));
 }

+static void
+surface_allocation_changed_notify (ClutterActor           *actor,
+                                   const ClutterActorBox  *allocation,
+                                   ClutterAllocationFlags  flags,
+                                   MetaWindowActor        *self)
+{
+  meta_window_actor_sync_actor_geometry (self, FALSE);
+  meta_window_actor_update_shape (self);
+
+  g_signal_emit (self, signals[SIZE_CHANGED], 0);
+}
+
+static gboolean
+is_non_opaque (MetaWindowActor *self)
+{
+  MetaWindowActorPrivate *priv = self->priv;
+  MetaWindow *window = priv->window;
+
+  return priv->argb32 || (window->opacity != 0xFF);
+}
+
 static void
 meta_window_actor_constructed (GObject *object)
 {
  MetaWindowActor        *self     = META_WINDOW_ACTOR (object);
  MetaWindowActorPrivate *priv     = self->priv;
-  MetaScreen             *screen   = priv->screen;
-  MetaDisplay            *display  = meta_screen_get_display (screen);
-  Window                  xwindow  = priv->xwindow;
  MetaWindow             *window   = priv->window;
+  Window                  xwindow  = meta_window_get_toplevel_xwindow (window);
+  MetaScreen             *screen   = meta_window_get_screen (window);
+  MetaDisplay            *display  = meta_screen_get_display (screen);
  Display                *xdisplay = meta_display_get_xdisplay (display);

+  priv->screen = screen;
+
  if (!meta_is_wayland_compositor ())
    priv->damage = XDamageCreate (xdisplay, xwindow,
                                  XDamageReportBoundingBox);
@@ -389,47 +376,26 @@ meta_window_actor_constructed (GObject *object)
      priv->argb32 = TRUE;
    }

-  if (!priv->actor)
+  if (!priv->surface)
    {
-      if (meta_is_wayland_compositor ())
-        priv->actor = meta_shaped_texture_new_with_wayland_surface (window->surface);
+      if (window->surface)
+        priv->surface = window->surface->surface_actor;
      else
-        priv->actor = meta_shaped_texture_new_with_xwindow (xwindow);
+        priv->surface = meta_surface_actor_new ();
+      g_object_ref_sink (priv->surface);

-      clutter_actor_add_child (CLUTTER_ACTOR (self), priv->actor);
+      clutter_actor_add_child (CLUTTER_ACTOR (self), CLUTTER_ACTOR (priv->surface));

-      if (meta_is_wayland_compositor ())
-        clutter_actor_set_reactive (priv->actor, TRUE);
-
-      /*
-       * Since we are holding a pointer to this actor independently of the
-       * ClutterContainer internals, and provide a public API to access it,
-       * add a reference here, so that if someone is messing about with us
-       * via the container interface, we do not end up with a dangling pointer.
-       * We will release it in dispose().
-       */
-      g_object_ref (priv->actor);
-
-      g_signal_connect_object (window, "notify::decorated",
-                               G_CALLBACK (window_decorated_notify), self, 0);
-      g_signal_connect_object (window, "notify::appears-focused",
-                               G_CALLBACK (window_appears_focused_notify), self, 0);
-    }
-  else
-    {
-      /*
-       * This is the case where existing window is gaining/loosing frame.
-       * Just ensure the actor is top most (i.e., above shadow).
-       */
-      clutter_actor_set_child_above_sibling (CLUTTER_ACTOR (self), priv->actor, NULL);
+      g_signal_connect_object (priv->surface, "allocation-changed",
+                               G_CALLBACK (surface_allocation_changed_notify), self, 0);
+      meta_window_actor_update_shape (self);
    }

  meta_window_actor_update_opacity (self);

-  /* Start off with empty regions to maintain the invariant that
-     these regions are always set */
+  /* Start off with an empty shape region to maintain the invariant
+   * that it's always set */
  priv->shape_region = cairo_region_create ();
-  priv->input_region = cairo_region_create ();
 }

 static void
@@ -461,8 +427,6 @@ meta_window_actor_dispose (GObject *object)

  g_clear_pointer (&priv->unobscured_region, cairo_region_destroy);
  g_clear_pointer (&priv->shape_region, cairo_region_destroy);
-  g_clear_pointer (&priv->input_region, cairo_region_destroy);
-  g_clear_pointer (&priv->opaque_region, cairo_region_destroy);
  g_clear_pointer (&priv->shadow_clip, cairo_region_destroy);

  g_clear_pointer (&priv->shadow_class, g_free);
@@ -489,7 +453,7 @@ meta_window_actor_dispose (GObject *object)
  /*
   * Release the extra reference we took on the actor.
   */
-  g_clear_object (&priv->actor);
+  g_clear_object (&priv->surface);

  G_OBJECT_CLASS (meta_window_actor_parent_class)->dispose (object);
 }
@@ -517,17 +481,12 @@ meta_window_actor_set_property (GObject      *object,
  switch (prop_id)
    {
    case PROP_META_WINDOW:
-      {
-        if (priv->window)
-          g_object_unref (priv->window);
-        priv->window = g_value_dup_object (value);
-      }
-      break;
-    case PROP_META_SCREEN:
-      priv->screen = g_value_get_pointer (value);
-      break;
-    case PROP_X_WINDOW:
-      priv->xwindow = g_value_get_ulong (value);
+      priv->window = g_value_dup_object (value);
+
+      g_signal_connect_object (priv->window, "notify::decorated",
+                               G_CALLBACK (window_decorated_notify), self, 0);
+      g_signal_connect_object (priv->window, "notify::appears-focused",
+                               G_CALLBACK (window_appears_focused_notify), self, 0);
      break;
    case PROP_NO_SHADOW:
      {
@@ -573,12 +532,6 @@ meta_window_actor_get_property (GObject      *object,
    case PROP_META_WINDOW:
      g_value_set_object (value, priv->window);
      break;
-    case PROP_META_SCREEN:
-      g_value_set_pointer (value, priv->screen);
-      break;
-    case PROP_X_WINDOW:
-      g_value_set_ulong (value, priv->xwindow);
-      break;
    case PROP_NO_SHADOW:
      g_value_set_boolean (value, priv->no_shadow);
      break;
@@ -676,7 +629,7 @@ clip_shadow_under_window (MetaWindowActor *self)
 {
  MetaWindowActorPrivate *priv = self->priv;

-  return (priv->argb32 || priv->opacity != 0xff) && priv->window->frame;
+  return is_non_opaque (self) && priv->window->frame;
 }

 static void
@@ -702,6 +655,7 @@ meta_window_actor_paint (ClutterActor *actor)
      MetaShadowParams params;
      cairo_rectangle_int_t shape_bounds;
      cairo_region_t *clip = priv->shadow_clip;
+      MetaWindow *window = priv->window;

      meta_window_actor_get_shape_bounds (self, &shape_bounds);
      meta_window_actor_get_shadow_params (self, appears_focused, &params);
@@ -725,7 +679,7 @@ meta_window_actor_paint (ClutterActor *actor)
                         params.y_offset + shape_bounds.y,
                         shape_bounds.width,
                         shape_bounds.height,
-                         (clutter_actor_get_paint_opacity (actor) * params.opacity * priv->opacity) / (255 * 255),
+                         (clutter_actor_get_paint_opacity (actor) * params.opacity * window->opacity) / (255 * 255),
                         clip,
                         clip_shadow_under_window (self)); /* clip_strictly - not just as an optimization */

@@ -768,7 +722,11 @@ meta_window_actor_get_paint_volume (ClutterActor       *actor,
    }

  if (priv->unobscured_region)
-    cairo_region_intersect_rectangle (priv->unobscured_region, &bounds);
+    {
+      cairo_rectangle_int_t unobscured_bounds;
+      cairo_region_get_extents (priv->unobscured_region, &unobscured_bounds);
+      gdk_rectangle_intersect (&bounds, &unobscured_bounds, &bounds);
+    }

  origin.x = bounds.x;
  origin.y = bounds.y;
@@ -812,10 +770,10 @@ meta_window_actor_has_shadow (MetaWindowActor *self)
    return TRUE;

  /*
-   * Do not add shadows to ARGB windows; eventually we should generate a
-   * shadow from the input shape for such windows.
+   * Do not add shadows to non-opaque windows; eventually we should generate
+   * a shadow from the input shape for such windows.
   */
-  if (priv->argb32 || priv->opacity != 0xff)
+  if (is_non_opaque (self))
    return FALSE;

  /*
@@ -846,20 +804,6 @@ meta_window_actor_has_shadow (MetaWindowActor *self)
  return FALSE;
 }

-/**
- * meta_window_actor_get_x_window: (skip)
- * @self: a #MetaWindowActor
- *
- */
-Window
-meta_window_actor_get_x_window (MetaWindowActor *self)
-{
-  if (!self)
-    return None;
-
-  return self->priv->xwindow;
-}
-
 /**
 * meta_window_actor_get_meta_window:
 * @self: a #MetaWindowActor
@@ -885,7 +829,21 @@ meta_window_actor_get_meta_window (MetaWindowActor *self)
 ClutterActor *
 meta_window_actor_get_texture (MetaWindowActor *self)
 {
-  return self->priv->actor;
+  return CLUTTER_ACTOR (meta_surface_actor_get_texture (self->priv->surface));
+}
+
+/**
+ * meta_window_actor_get_surface:
+ * @self: a #MetaWindowActor
+ *
+ * Gets the MetaSurfaceActor that draws the content of this window
+ *
+ * Return value: (transfer none): the #MetaSurfaceActor for the contents
+ */
+MetaSurfaceActor *
+meta_window_actor_get_surface (MetaWindowActor *self)
+{
+  return self->priv->surface;
 }

 /**
@@ -962,8 +920,8 @@ meta_window_actor_freeze (MetaWindowActor *self)
    self->priv->freeze_count++;
 }

-static
-gboolean send_frame_messages_timeout (gpointer data)
+static gboolean
+send_frame_messages_timeout (gpointer data)
 {
  MetaWindowActor *self = (MetaWindowActor *) data;
  MetaWindowActorPrivate *priv = self->priv;
@@ -1020,26 +978,22 @@ static void
 meta_window_actor_damage_all (MetaWindowActor *self)
 {
  MetaWindowActorPrivate *priv = self->priv;
-  CoglTexture *texture;
+  cairo_region_t *unobscured_region;
  gboolean redraw_queued;

  if (!priv->needs_damage_all)
    return;

-  texture = meta_shaped_texture_get_texture (META_SHAPED_TEXTURE (priv->actor));
-
  if (!priv->mapped || priv->needs_pixmap)
    return;

-  redraw_queued = meta_shaped_texture_update_area (META_SHAPED_TEXTURE (priv->actor),
-                                                   0, 0,
-                                                   cogl_texture_get_width (texture),
-                                                   cogl_texture_get_height (texture),
-                                                   clutter_actor_has_mapped_clones (priv->actor) ?
-                                                   NULL : priv->unobscured_region);
+  unobscured_region =
+    clutter_actor_has_mapped_clones (CLUTTER_ACTOR (priv->surface))
+    ? NULL : priv->unobscured_region;

-  priv->repaint_scheduled = priv->repaint_scheduled  || redraw_queued;
+  redraw_queued = meta_surface_actor_damage_all (priv->surface, unobscured_region);

+  priv->repaint_scheduled = priv->repaint_scheduled || redraw_queued;
  priv->needs_damage_all = FALSE;
 }

@@ -1123,7 +1077,7 @@ meta_window_actor_queue_frame_drawn (MetaWindowActor *self,
      else if (priv->mapped && (!meta_is_wayland_compositor () || !priv->needs_pixmap))
        {
          const cairo_rectangle_int_t clip = { 0, 0, 1, 1 };
-          clutter_actor_queue_redraw_with_clip (priv->actor, &clip);
+          clutter_actor_queue_redraw_with_clip (CLUTTER_ACTOR (priv->surface), &clip);
          priv->repaint_scheduled = TRUE;
        }
    }
@@ -1166,7 +1120,7 @@ meta_window_actor_queue_create_x11_pixmap (MetaWindowActor *self)
   *
   * The compositor paint function repairs all windows.
   */
-  clutter_actor_queue_redraw (priv->actor);
+  clutter_actor_queue_redraw (CLUTTER_ACTOR (priv->surface));
 }

 static gboolean
@@ -1256,7 +1210,7 @@ meta_window_actor_after_effects (MetaWindowActor *self)
        meta_window_actor_detach_x11_pixmap (self);

      if (priv->needs_pixmap)
-        clutter_actor_queue_redraw (priv->actor);
+        clutter_actor_queue_redraw (CLUTTER_ACTOR (priv->surface));
    }
 }

@@ -1352,8 +1306,7 @@ meta_window_actor_detach_x11_pixmap (MetaWindowActor *self)
   * you are supposed to be able to free a GLXPixmap after freeing the underlying
   * pixmap, but it certainly doesn't work with current DRI/Mesa
   */
-  meta_shaped_texture_set_pixmap (META_SHAPED_TEXTURE (priv->actor),
-                                  None);
+  meta_surface_actor_set_texture (priv->surface, NULL);
  cogl_flush();

  XFreePixmap (xdisplay, priv->back_pixmap);
@@ -1371,7 +1324,7 @@ meta_window_actor_should_unredirect (MetaWindowActor *self)
  if (meta_window_requested_dont_bypass_compositor (metaWindow))
    return FALSE;

-  if (priv->opacity != 0xff)
+  if (metaWindow->opacity != 0xFF)
    return FALSE;

  if (metaWindow->shape_region != NULL)
@@ -1402,7 +1355,7 @@ meta_window_actor_set_redirected (MetaWindowActor *self, gboolean state)
  MetaDisplay *display = meta_window_get_display (metaWindow);

  Display *xdisplay = meta_display_get_xdisplay (display);
-  Window  xwin = meta_window_actor_get_x_window (self);
+  Window  xwin = meta_window_get_toplevel_xwindow (metaWindow);

  if (state)
    {
@@ -1431,9 +1384,6 @@ meta_window_actor_destroy (MetaWindowActor *self)

  priv = self->priv;

-  if (meta_is_wayland_compositor ())
-    meta_shaped_texture_set_wayland_surface (META_SHAPED_TEXTURE (priv->actor), NULL);
-
  window = priv->window;
  window_type = meta_window_get_window_type (window);
  meta_window_set_compositor_private (window, NULL);
@@ -1575,6 +1525,7 @@ meta_window_actor_hide (MetaWindowActor *self,
  g_return_if_fail (priv->visible);

  priv->visible = FALSE;
+  clutter_actor_set_reactive (CLUTTER_ACTOR (self), FALSE);

  /* If a plugin is animating a workspace transition, we have to
   * hold off on hiding the window, and do it after the workspace
@@ -1668,31 +1619,10 @@ meta_window_actor_new (MetaWindow *window)
  MetaCompScreen         *info = meta_screen_get_compositor_data (screen);
  MetaWindowActor        *self;
  MetaWindowActorPrivate *priv;
-  MetaFrame		 *frame;
-  Window		  top_window = None;
  ClutterActor           *window_group;

-  if (window->client_type == META_WINDOW_CLIENT_TYPE_X11)
-    {
-      frame = meta_window_get_frame (window);
-      if (frame)
-        top_window = meta_frame_get_xwindow (frame);
-      else
-        top_window = meta_window_get_xwindow (window);
-
-      meta_verbose ("add window: Meta %p, xwin 0x%x\n", window, (guint)top_window);
-    }
-  else
-    {
-      meta_verbose ("add window: Meta %p, wayland surface %p\n",
-                    window, window->surface);
-      top_window = None;
-    }
-
  self = g_object_new (META_TYPE_WINDOW_ACTOR,
-                       "meta-window",         window,
-                       "x-window",            top_window,
-                       "meta-screen",         screen,
+                       "meta-window", window,
                       NULL);

  priv = self->priv;
@@ -1772,38 +1702,6 @@ meta_window_actor_unmapped (MetaWindowActor *self)
    }
 }

-/**
- * meta_window_actor_get_obscured_region:
- * @self: a #MetaWindowActor
- *
- * Gets the region that is completely obscured by the window. Coordinates
- * are relative to the upper-left of the window.
- *
- * Return value: (transfer none): the area obscured by the window,
- *  %NULL is the same as an empty region.
- */
-cairo_region_t *
-meta_window_actor_get_obscured_region (MetaWindowActor *self)
-{
-  MetaWindowActorPrivate *priv = self->priv;
-
-  if (!priv->window->shaded)
-    {
-      if (meta_is_wayland_compositor ())
-        {
-          if (priv->opacity == 0xff)
-            return priv->opaque_region;
-        }
-      else
-        {
-          if (priv->back_pixmap && priv->opacity == 0xff)
-            return priv->opaque_region;
-        }
-    }
-
-  return NULL;
-}
-
 #if 0
 /* Print out a region; useful for debugging */
 static void
@@ -1853,8 +1751,6 @@ see_region (cairo_region_t *region,
 *
 * Provides a hint as to what areas of the window need to queue
 * redraws when damaged. Regions not in @unobscured_region are completely obscured.
- * Unlike meta_window_actor_set_clip_region(), the region here
- * doesn't take into account any clipping that is in effect while drawing.
 */
 void
 meta_window_actor_set_unobscured_region (MetaWindowActor *self,
@@ -1871,27 +1767,6 @@ meta_window_actor_set_unobscured_region (MetaWindowActor *self,
    priv->unobscured_region = NULL;
 }

-/**
- * meta_window_actor_set_clip_region:
- * @self: a #MetaWindowActor
- * @clip_region: the region of the screen that isn't completely
- *  obscured.
- *
- * Provides a hint as to what areas of the window need to be
- * drawn. Regions not in @clip_region are completely obscured or
- * not drawn in this frame.
- * This will be set before painting then unset afterwards.
- */
-void
-meta_window_actor_set_clip_region (MetaWindowActor *self,
-                                   cairo_region_t  *clip_region)
-{
-  MetaWindowActorPrivate *priv = self->priv;
-
-  meta_shaped_texture_set_clip_region (META_SHAPED_TEXTURE (priv->actor),
-                                       clip_region);
-}
-
 /**
 * meta_window_actor_set_clip_region_beneath:
 * @self: a #MetaWindowActor
@@ -1904,7 +1779,7 @@ meta_window_actor_set_clip_region (MetaWindowActor *self,
 * shadow hid by the window itself. This will be set before painting
 * then unset afterwards.
 */
-void
+static void
 meta_window_actor_set_clip_region_beneath (MetaWindowActor *self,
                                           cairo_region_t  *beneath_region)
 {
@@ -1924,21 +1799,43 @@ meta_window_actor_set_clip_region_beneath (MetaWindowActor *self,
    }
 }

-/**
- * meta_window_actor_reset_clip_regions:
- * @self: a #MetaWindowActor
- *
- * Unsets the regions set by meta_window_actor_set_clip_region() and
- * meta_window_actor_set_clip_region_beneath()
- */
-void
-meta_window_actor_reset_clip_regions (MetaWindowActor *self)
+static void
+meta_window_actor_cull_out (MetaCullable   *cullable,
+                            cairo_region_t *unobscured_region,
+                            cairo_region_t *clip_region)
 {
+  MetaWindowActor *self = META_WINDOW_ACTOR (cullable);
+
+  if (!meta_is_wayland_compositor ())
+    {
+      MetaCompScreen *info = meta_screen_get_compositor_data (self->priv->screen);
+
+      /* Don't do any culling for the unredirected window */
+      if (self == info->unredirected_window)
+        return;
+    }
+
+  meta_window_actor_set_unobscured_region (self, unobscured_region);
+  meta_cullable_cull_out_children (cullable, unobscured_region, clip_region);
+  meta_window_actor_set_clip_region_beneath (self, clip_region);
+}
+
+static void
+meta_window_actor_reset_culling (MetaCullable *cullable)
+{
+  MetaWindowActor *self = META_WINDOW_ACTOR (cullable);
  MetaWindowActorPrivate *priv = self->priv;

-  meta_shaped_texture_set_clip_region (META_SHAPED_TEXTURE (priv->actor),
-                                       NULL);
  g_clear_pointer (&priv->shadow_clip, cairo_region_destroy);
+
+  meta_cullable_reset_culling_children (cullable);
+}
+
+static void
+cullable_iface_init (MetaCullableInterface *iface)
+{
+  iface->cull_out = meta_window_actor_cull_out;
+  iface->reset_culling = meta_window_actor_reset_culling;
 }

 /* When running as a wayland compositor we don't make requests for
@@ -1952,8 +1849,7 @@ check_needs_x11_pixmap (MetaWindowActor *self)
  MetaDisplay         *display  = meta_screen_get_display (screen);
  Display             *xdisplay = meta_display_get_xdisplay (display);
  MetaCompScreen      *info     = meta_screen_get_compositor_data (screen);
-  MetaCompositor      *compositor;
-  Window               xwindow  = priv->xwindow;
+  Window               xwindow  = meta_window_get_toplevel_xwindow (priv->window);

  if (!priv->needs_pixmap)
    return;
@@ -1965,8 +1861,6 @@ check_needs_x11_pixmap (MetaWindowActor *self)
      xwindow == clutter_x11_get_stage_window (CLUTTER_STAGE (info->stage)))
    return;

-  compositor = meta_display_get_compositor (display);
-
  if (priv->x11_size_changed)
    {
      meta_window_actor_detach_x11_pixmap (self);
@@ -1977,6 +1871,7 @@ check_needs_x11_pixmap (MetaWindowActor *self)

  if (priv->back_pixmap == None)
    {
+      CoglContext *ctx = clutter_backend_get_cogl_context (clutter_get_default_backend ());
      CoglTexture *texture;

      meta_error_trap_push (display);
@@ -2001,24 +1896,13 @@ check_needs_x11_pixmap (MetaWindowActor *self)
          goto out;
        }

-      if (compositor->no_mipmaps)
-        meta_shaped_texture_set_create_mipmaps (META_SHAPED_TEXTURE (priv->actor),
-                                                FALSE);
-
-      meta_shaped_texture_set_pixmap (META_SHAPED_TEXTURE (priv->actor),
-                                      priv->back_pixmap);
-
-      texture = meta_shaped_texture_get_texture (META_SHAPED_TEXTURE (priv->actor));
-
-      /*
-       * This only works *after* actually setting the pixmap, so we have to
-       * do it here.
-       * See: http://bugzilla.clutter-project.org/show_bug.cgi?id=2236
-       */
+      texture = COGL_TEXTURE (cogl_texture_pixmap_x11_new (ctx, priv->back_pixmap, FALSE, NULL));
      if (G_UNLIKELY (!cogl_texture_pixmap_x11_is_using_tfp_extension (COGL_TEXTURE_PIXMAP_X11 (texture))))
        g_warning ("NOTE: Not using GLX TFP!\n");

-      /* ::size-changed is supposed to refer to meta_window_get_outer_rect().
+      meta_surface_actor_set_texture (META_SURFACE_ACTOR (priv->surface), texture);
+
+      /* ::size-changed is supposed to refer to meta_window_get_frame_rect().
       * Emitting it here works pretty much OK because a new value of the
       * *input* rect (which is the outer rect with the addition of invisible
       * borders) forces a new pixmap and we get here. In the rare case where
@@ -2108,13 +1992,14 @@ meta_window_actor_process_x11_damage (MetaWindowActor    *self,
  MetaWindowActorPrivate *priv = self->priv;
  MetaCompScreen *info = meta_screen_get_compositor_data (priv->screen);
  gboolean redraw_queued;
+  cairo_region_t *unobscured_region;

  priv->received_x11_damage = TRUE;

  if (meta_window_is_fullscreen (priv->window) && g_list_last (info->windows)->data == self && !priv->unredirected)
    {
      MetaRectangle window_rect;
-      meta_window_get_outer_rect (priv->window, &window_rect);
+      meta_window_get_frame_rect (priv->window, &window_rect);

      if (window_rect.x == event->area.x &&
          window_rect.y == event->area.y &&
@@ -2155,39 +2040,20 @@ meta_window_actor_process_x11_damage (MetaWindowActor    *self,
  if (!priv->mapped || priv->needs_pixmap)
    return;

-  redraw_queued = meta_shaped_texture_update_area (META_SHAPED_TEXTURE (priv->actor),
-                                                   event->area.x,
-                                                   event->area.y,
-                                                   event->area.width,
-                                                   event->area.height,
-                                                   clutter_actor_has_mapped_clones (priv->actor) ?
-                                                   NULL : priv->unobscured_region);
+  unobscured_region =
+    clutter_actor_has_mapped_clones (CLUTTER_ACTOR (priv->surface))
+    ? NULL : priv->unobscured_region;
+  redraw_queued = meta_surface_actor_damage_area (priv->surface,
+                                                  event->area.x,
+                                                  event->area.y,
+                                                  event->area.width,
+                                                  event->area.height,
+                                                  unobscured_region);

  priv->repaint_scheduled = priv->repaint_scheduled  || redraw_queued;

 }

-void
-meta_window_actor_process_wayland_damage (MetaWindowActor *self,
-                                          int x,
-                                          int y,
-                                          int width,
-                                          int height)
-{
-  MetaWindowActorPrivate *priv = self->priv;
-  gboolean redraw_queued;
-
-  if (!priv->mapped)
-    return;
-
-  redraw_queued = meta_shaped_texture_update_area (META_SHAPED_TEXTURE (priv->actor),
-                                                   x, y, width, height,
-                                                   clutter_actor_has_mapped_clones (priv->actor) ?
-                                                   NULL : priv->unobscured_region);
-
-  priv->repaint_scheduled = priv->repaint_scheduled  || redraw_queued;
-}
-
 void
 meta_window_actor_sync_visibility (MetaWindowActor *self)
 {
@@ -2247,12 +2113,18 @@ build_and_scan_frame_mask (MetaWindowActor       *self,
  MetaWindowActorPrivate *priv = self->priv;
  guchar *mask_data;
  guint tex_width, tex_height;
+  MetaShapedTexture *stex;
  CoglTexture *paint_tex, *mask_texture;
  int stride;
  cairo_t *cr;
  cairo_surface_t *surface;

-  paint_tex = meta_shaped_texture_get_texture (META_SHAPED_TEXTURE (priv->actor));
+  stex = meta_surface_actor_get_texture (priv->surface);
+  g_return_if_fail (stex);
+
+  meta_shaped_texture_set_mask_texture (stex, NULL);
+
+  paint_tex = meta_shaped_texture_get_texture (stex);
  if (paint_tex == NULL)
    return;

@@ -2300,12 +2172,18 @@ build_and_scan_frame_mask (MetaWindowActor       *self,

  if (meta_texture_rectangle_check (paint_tex))
    {
-      mask_texture = meta_texture_rectangle_new (tex_width, tex_height,
-                                                 COGL_PIXEL_FORMAT_A_8,
-                                                 COGL_PIXEL_FORMAT_A_8,
-                                                 stride,
-                                                 mask_data,
-                                                 NULL /* error */);
+      ClutterBackend *backend = clutter_get_default_backend ();
+      CoglContext *context = clutter_backend_get_cogl_context (backend);
+
+      mask_texture = COGL_TEXTURE (cogl_texture_rectangle_new_with_size (context, tex_width, tex_height));
+      cogl_texture_set_components (mask_texture, COGL_TEXTURE_COMPONENTS_A);
+      cogl_texture_set_region (mask_texture,
+                               0, 0, /* src_x/y */
+                               0, 0, /* dst_x/y */
+                               tex_width, tex_height, /* dst_width/height */
+                               tex_width, tex_height, /* width/height */
+                               COGL_PIXEL_FORMAT_A_8,
+                               stride, mask_data);
    }
  else
    {
@@ -2320,8 +2198,7 @@ build_and_scan_frame_mask (MetaWindowActor       *self,
                                                 mask_data);
    }

-  meta_shaped_texture_set_mask_texture (META_SHAPED_TEXTURE (priv->actor),
-                                        mask_texture);
+  meta_shaped_texture_set_mask_texture (stex, mask_texture);
  cogl_object_unref (mask_texture);

  g_free (mask_data);
@@ -2351,7 +2228,6 @@ meta_window_actor_update_shape_region (MetaWindowActor       *self,
      region = cairo_region_create_rectangle (client_area);
    }

-  meta_shaped_texture_set_mask_texture (META_SHAPED_TEXTURE (priv->actor), NULL);
  if ((priv->window->shape_region != NULL) || (priv->window->frame != NULL))
    build_and_scan_frame_mask (self, client_area, region);

@@ -2368,7 +2244,6 @@ meta_window_actor_update_input_region (MetaWindowActor       *self,
                                       cairo_rectangle_int_t *client_area)
 {
  MetaWindowActorPrivate *priv = self->priv;
-  MetaShapedTexture *stex = META_SHAPED_TEXTURE (priv->actor);
  cairo_region_t *region = NULL;

  if (priv->window->frame != NULL && priv->window->input_region != NULL)
@@ -2383,7 +2258,7 @@ meta_window_actor_update_input_region (MetaWindowActor       *self,
      cairo_region_union (region, priv->window->input_region);
      cairo_region_translate (region, client_area->x, client_area->y);
    }
-  else if (priv->window->shape_region != NULL)
+  else if (priv->window->input_region != NULL)
    {
      region = cairo_region_reference (priv->window->input_region);
    }
@@ -2395,7 +2270,7 @@ meta_window_actor_update_input_region (MetaWindowActor       *self,
      region = cairo_region_create_rectangle (client_area);
    }

-  meta_shaped_texture_set_input_shape_region (stex, region);
+  meta_surface_actor_set_input_region (priv->surface, region);
  cairo_region_destroy (region);
 }

@@ -2403,8 +2278,7 @@ static void
 meta_window_actor_update_opaque_region (MetaWindowActor *self)
 {
  MetaWindowActorPrivate *priv = self->priv;
-
-  g_clear_pointer (&priv->opaque_region, cairo_region_destroy);
+  cairo_region_t *opaque_region;

  if (priv->argb32 && priv->window->opaque_region != NULL)
    {
@@ -2422,17 +2296,17 @@ meta_window_actor_update_opaque_region (MetaWindowActor *self)
       * to be undefined, and considered a client bug. In mutter's
       * case, graphical glitches will occur.
       */
-      priv->opaque_region = cairo_region_copy (priv->window->opaque_region);
-      cairo_region_translate (priv->opaque_region, borders.total.left, borders.total.top);
-      cairo_region_intersect (priv->opaque_region, priv->shape_region);
+      opaque_region = cairo_region_copy (priv->window->opaque_region);
+      cairo_region_translate (opaque_region, borders.total.left, borders.total.top);
+      cairo_region_intersect (opaque_region, priv->shape_region);
    }
  else if (priv->argb32)
-    priv->opaque_region = NULL;
+    opaque_region = NULL;
  else
-    priv->opaque_region = cairo_region_reference (priv->shape_region);
+    opaque_region = cairo_region_reference (priv->shape_region);

-  meta_shaped_texture_set_opaque_region (META_SHAPED_TEXTURE (priv->actor),
-                                         priv->opaque_region);
+  meta_surface_actor_set_opaque_region (priv->surface, opaque_region);
+  cairo_region_destroy (opaque_region);
 }

 static void
@@ -2459,8 +2333,12 @@ check_needs_reshape (MetaWindowActor *self)
    client_area.height = priv->window->rect.height;

  meta_window_actor_update_shape_region (self, &client_area);
-  meta_window_actor_update_input_region (self, &client_area);
-  meta_window_actor_update_opaque_region (self);
+
+  if (priv->window->client_type == META_WINDOW_CLIENT_TYPE_X11)
+    {
+      meta_window_actor_update_input_region (self, &client_area);
+      meta_window_actor_update_opaque_region (self);
+    }

  priv->needs_reshape = FALSE;
 }
@@ -2475,68 +2353,7 @@ meta_window_actor_update_shape (MetaWindowActor *self)
  if (is_frozen (self))
    return;

-  clutter_actor_queue_redraw (priv->actor);
-}
-
-static void
-maybe_emit_size_changed (MetaWindowActor *self,
-                         MetaWaylandBuffer *new_buffer)
-{
-  MetaWindowActorPrivate *priv = self->priv;
-  int                     width = 0, height = 0;
-
-  if (new_buffer)
-    {
-      width = new_buffer->width;
-      height = new_buffer->height;
-    }
-
-  if (priv->last_width != width || priv->last_height != height)
-    {
-      meta_window_actor_update_shape (self);
-
-      /* ::size-changed is supposed to refer to meta_window_get_outer_rect()
-       * but here we are only looking at buffer size changes.
-       *
-       * Emitting it here works pretty much OK because a new buffer size (which
-       * will correspond to the outer rect with the addition of invisible
-       * borders) also normally implies a change to the outer rect. In the rare
-       * case where a change to the window size was exactly balanced by a
-       * change to the invisible borders, we would miss emitting the signal.
-       */
-      g_signal_emit (self, signals[SIZE_CHANGED], 0);
-
-      priv->last_width = width;
-      priv->last_height = height;
-    }
-}
-
-void
-meta_window_actor_set_wayland_surface (MetaWindowActor *self,
-                                       MetaWaylandSurface *surface)
-{
-  MetaWindowActorPrivate *priv = self->priv;
-
-  meta_shaped_texture_set_wayland_surface (META_SHAPED_TEXTURE (priv->actor),
-                                           surface);
-  if (surface && surface->buffer_ref.buffer)
-    maybe_emit_size_changed (self, surface->buffer_ref.buffer);
-}
-
-void
-meta_window_actor_attach_wayland_buffer (MetaWindowActor *self,
-                                         MetaWaylandBuffer *buffer)
-{
-  MetaWindowActorPrivate *priv = self->priv;
-  MetaShapedTexture *stex = META_SHAPED_TEXTURE (priv->actor);
-  CoglTexture *prev_tex = meta_shaped_texture_get_texture (stex);
-
-  meta_shaped_texture_attach_wayland_buffer (stex, buffer);
-
-  if (!prev_tex)
-    meta_window_actor_sync_actor_geometry (self, FALSE);
-
-  maybe_emit_size_changed (self, buffer);
+  clutter_actor_queue_redraw (CLUTTER_ACTOR (priv->surface));
 }

 static void
@@ -2772,23 +2589,9 @@ void
 meta_window_actor_update_opacity (MetaWindowActor *self)
 {
  MetaWindowActorPrivate *priv = self->priv;
-  MetaDisplay *display = meta_screen_get_display (priv->screen);
-  MetaCompositor *compositor = meta_display_get_compositor (display);
-  Window xwin = meta_window_get_xwindow (priv->window);
-  gulong value;
-  guint8 opacity;
+  MetaWindow *window = priv->window;

-  if (meta_prop_get_cardinal (display, xwin,
-                              compositor->atom_net_wm_window_opacity,
-                              &value))
-    {
-      opacity = (guint8)((gfloat)value * 255.0 / ((gfloat)0xffffffff));
-    }
-  else
-    opacity = 255;
-
-  self->priv->opacity = opacity;
-  clutter_actor_set_opacity (self->priv->actor, opacity);
+  clutter_actor_set_opacity (CLUTTER_ACTOR (self->priv->surface), window->opacity);
 }

 void
--- a/src/compositor/meta-window-group.c
+++ b/src/compositor/meta-window-group.c
@@ -11,9 +11,8 @@
 #include "compositor-private.h"
 #include "meta-window-actor-private.h"
 #include "meta-window-group.h"
-#include "meta-background-actor-private.h"
-#include "meta-background-group-private.h"
 #include "window-private.h"
+#include "meta-cullable.h"

 struct _MetaWindowGroupClass
 {
@@ -27,7 +26,10 @@ struct _MetaWindowGroup
  MetaScreen *screen;
 };

-G_DEFINE_TYPE (MetaWindowGroup, meta_window_group, CLUTTER_TYPE_ACTOR);
+static void cullable_iface_init (MetaCullableInterface *iface);
+
+G_DEFINE_TYPE_WITH_CODE (MetaWindowGroup, meta_window_group, CLUTTER_TYPE_ACTOR,
+                         G_IMPLEMENT_INTERFACE (META_TYPE_CULLABLE, cullable_iface_init));

 /* Help macros to scale from OpenGL <-1,1> coordinates system to
 * window coordinates ranging [0,window-size]. Borrowed from clutter-utils.c
@@ -87,6 +89,27 @@ painting_untransformed (MetaWindowGroup *window_group,
  return meta_actor_vertices_are_untransformed (vertices, width, height, x_origin, y_origin);
 }

+static void
+meta_window_group_cull_out (MetaCullable   *cullable,
+                            cairo_region_t *unobscured_region,
+                            cairo_region_t *clip_region)
+{
+  meta_cullable_cull_out_children (cullable, unobscured_region, clip_region);
+}
+
+static void
+meta_window_group_reset_culling (MetaCullable *cullable)
+{
+  meta_cullable_reset_culling_children (cullable);
+}
+
+static void
+cullable_iface_init (MetaCullableInterface *iface)
+{
+  iface->cull_out = meta_window_group_cull_out;
+  iface->reset_culling = meta_window_group_reset_culling;
+}
+
 static void
 meta_window_group_paint (ClutterActor *actor)
 {
@@ -95,12 +118,11 @@ meta_window_group_paint (ClutterActor *actor)
  ClutterActorIter iter;
  ClutterActor *child;
  cairo_rectangle_int_t visible_rect, clip_rect;
+  int paint_x_offset, paint_y_offset;
  int paint_x_origin, paint_y_origin;
  int actor_x_origin, actor_y_origin;
-  int paint_x_offset, paint_y_offset;

  MetaWindowGroup *window_group = META_WINDOW_GROUP (actor);
-  MetaCompScreen *info = meta_screen_get_compositor_data (window_group->screen);
  ClutterActor *stage = clutter_actor_get_stage (actor);

  /* Start off by treating all windows as completely unobscured, so damage anywhere
@@ -135,9 +157,6 @@ meta_window_group_paint (ClutterActor *actor)
      return;
    }

-  paint_x_offset = paint_x_origin - actor_x_origin;
-  paint_y_offset = paint_y_origin - actor_y_origin;
-
  visible_rect.x = visible_rect.y = 0;
  visible_rect.width = clutter_actor_get_width (CLUTTER_ACTOR (stage));
  visible_rect.height = clutter_actor_get_height (CLUTTER_ACTOR (stage));
@@ -155,138 +174,58 @@ meta_window_group_paint (ClutterActor *actor)

  clip_region = cairo_region_create_rectangle (&clip_rect);

+  paint_x_offset = paint_x_origin - actor_x_origin;
+  paint_y_offset = paint_y_origin - actor_y_origin;
+  cairo_region_translate (clip_region, -paint_x_offset, -paint_y_offset);
+
  if (!meta_is_wayland_compositor ())
    {
-      info = meta_screen_get_compositor_data (window_group->screen);
+      MetaCompScreen *info = meta_screen_get_compositor_data (window_group->screen);
      if (info->unredirected_window != NULL)
        {
          cairo_rectangle_int_t unredirected_rect;
          MetaWindow *window = meta_window_actor_get_meta_window (info->unredirected_window);

-          meta_window_get_outer_rect (window, (MetaRectangle *)&unredirected_rect);
+          meta_window_get_frame_rect (window, (MetaRectangle *)&unredirected_rect);
          cairo_region_subtract_rectangle (unobscured_region, &unredirected_rect);
          cairo_region_subtract_rectangle (clip_region, &unredirected_rect);
        }
    }

-  /* We walk the list from top to bottom (opposite of painting order),
-   * and subtract the opaque area of each window out of the visible
-   * region that we pass to the windows below.
-   */
-  clutter_actor_iter_init (&iter, actor);
-  while (clutter_actor_iter_prev (&iter, &child))
-    {
-      if (!CLUTTER_ACTOR_IS_VISIBLE (child))
-        continue;
-
-      if (!meta_is_wayland_compositor () &&
-          info->unredirected_window != NULL &&
-          child == CLUTTER_ACTOR (info->unredirected_window))
-        continue;
-
-      /* If an actor has effects applied, then that can change the area
-       * it paints and the opacity, so we no longer can figure out what
-       * portion of the actor is obscured and what portion of the screen
-       * it obscures, so we skip the actor.
-       *
-       * This has a secondary beneficial effect: if a ClutterOffscreenEffect
-       * is applied to an actor, then our clipped redraws interfere with the
-       * caching of the FBO - even if we only need to draw a small portion
-       * of the window right now, ClutterOffscreenEffect may use other portions
-       * of the FBO later. So, skipping actors with effects applied also
-       * prevents these bugs.
-       *
-       * Theoretically, we should check clutter_actor_get_offscreen_redirect()
-       * as well for the same reason, but omitted for simplicity in the
-       * hopes that no-one will do that.
-       */
-      if (clutter_actor_has_effects (child))
-        continue;
-
-      if (META_IS_WINDOW_ACTOR (child))
-        {
-          MetaWindowActor *window_actor = META_WINDOW_ACTOR (child);
-          int x, y;
-
-          if (!meta_actor_is_untransformed (CLUTTER_ACTOR (window_actor), &x, &y))
-            continue;
-
-          x += paint_x_offset;
-          y += paint_y_offset;
-
-
-          /* Temporarily move to the coordinate system of the actor */
-          cairo_region_translate (unobscured_region, - x, - y);
-          cairo_region_translate (clip_region, - x, - y);
-
-          meta_window_actor_set_unobscured_region (window_actor, unobscured_region);
-          meta_window_actor_set_clip_region (window_actor, clip_region);
-
-          if (clutter_actor_get_paint_opacity (CLUTTER_ACTOR (window_actor)) == 0xff)
-            {
-              cairo_region_t *obscured_region = meta_window_actor_get_obscured_region (window_actor);
-              if (obscured_region)
-                {
-                  cairo_region_subtract (unobscured_region, obscured_region);
-                  cairo_region_subtract (clip_region, obscured_region);
-                }
-            }
-
-          meta_window_actor_set_clip_region_beneath (window_actor, clip_region);
-
-          cairo_region_translate (unobscured_region, x, y);
-          cairo_region_translate (clip_region, x, y);
-        }
-      else if (META_IS_BACKGROUND_ACTOR (child) ||
-               META_IS_BACKGROUND_GROUP (child))
-        {
-          int x, y;
-
-          if (!meta_actor_is_untransformed (child, &x, &y))
-            continue;
-
-          x += paint_x_offset;
-          y += paint_y_offset;
-
-          cairo_region_translate (clip_region, - x, - y);
-
-          if (META_IS_BACKGROUND_GROUP (child))
-            meta_background_group_set_clip_region (META_BACKGROUND_GROUP (child), clip_region);
-          else
-            meta_background_actor_set_clip_region (META_BACKGROUND_ACTOR (child), clip_region);
-          cairo_region_translate (clip_region, x, y);
-        }
-    }
+  meta_cullable_cull_out (META_CULLABLE (window_group), unobscured_region, clip_region);

  cairo_region_destroy (unobscured_region);
  cairo_region_destroy (clip_region);

  CLUTTER_ACTOR_CLASS (meta_window_group_parent_class)->paint (actor);

-  /* Now that we are done painting, unset the visible regions (they will
-   * mess up painting clones of our actors)
-   */
-  clutter_actor_iter_init (&iter, actor);
-  while (clutter_actor_iter_next (&iter, &child))
-    {
-      if (META_IS_WINDOW_ACTOR (child))
-        {
-          MetaWindowActor *window_actor = META_WINDOW_ACTOR (child);
-          meta_window_actor_reset_clip_regions (window_actor);
-        }
-      else if (META_IS_BACKGROUND_ACTOR (child))
-        {
-          MetaBackgroundActor *background_actor = META_BACKGROUND_ACTOR (child);
-          meta_background_actor_set_clip_region (background_actor, NULL);
-        }
-    }
+  meta_cullable_reset_culling (META_CULLABLE (window_group));
 }

+/* Adapted from clutter_actor_update_default_paint_volume() */
 static gboolean
-meta_window_group_get_paint_volume (ClutterActor       *actor,
+meta_window_group_get_paint_volume (ClutterActor       *self,
                                    ClutterPaintVolume *volume)
 {
-  return clutter_paint_volume_set_from_allocation (volume, actor);
+  ClutterActorIter iter;
+  ClutterActor *child;
+
+  clutter_actor_iter_init (&iter, self);
+  while (clutter_actor_iter_next (&iter, &child))
+    {
+      const ClutterPaintVolume *child_volume;
+
+      if (!CLUTTER_ACTOR_IS_MAPPED (child))
+        continue;
+
+      child_volume = clutter_actor_get_transformed_paint_volume (child, self);
+      if (child_volume == NULL)
+        return FALSE;
+
+      clutter_paint_volume_union (volume, child_volume);
+    }
+
+  return TRUE;
 }

 static void
--- a/src/compositor/meta-window-group.h
+++ b/src/compositor/meta-window-group.h
@@ -11,29 +11,9 @@
 * MetaWindowGroup:
 *
 * This class is a subclass of ClutterActor with special handling for
- * MetaWindowActor/MetaBackgroundActor/MetaBackgroundGroup when painting
- * children.
- *
- * When we are painting a stack of 5-10 maximized windows, the
- * standard bottom-to-top method of drawing every actor results in a
- * tremendous amount of overdraw and can easily max out the available
- * memory bandwidth on a low-end graphics chipset. It's even worse if
- * window textures are being accessed over the AGP bus.
- *
- * The basic technique applied here is to do a pre-pass before painting
- * where we walk window from top to bottom and compute the visible area
- * at each step by subtracting out the windows above it. The visible
- * area is passed to MetaWindowActor which uses it to clip the portion of
- * the window which drawn and avoid redrawing the shadow if it is completely
- * obscured.
- *
- * A caveat is that this is ineffective if applications are using ARGB
- * visuals, since we have no way of knowing whether a window obscures
- * the windows behind it or not. Alternate approaches using the depth
- * or stencil buffer rather than client side regions might be able to
- * handle alpha windows, but the combination of glAlphaFunc and stenciling
- * tends not to be efficient except on newer cards. (And on newer cards
- * we have lots of memory and bandwidth.)
+ * #MetaCullable when painting children. It uses code similar to
+ * meta_cullable_cull_out_children(), but also has additional special
+ * cases for the undirected window, and similar.
 */

 #define META_TYPE_WINDOW_GROUP            (meta_window_group_get_type ())
--- a/src/compositor/meta-window-shape.c
+++ b/src/compositor/meta-window-shape.c
@@ -17,9 +17,7 @@
 * 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.
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
 */
 #include <string.h>

--- a/src/compositor/meta-window-shape.h
+++ b/src/compositor/meta-window-shape.h
@@ -17,9 +17,7 @@
 * 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.
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
 */

 #ifndef __META_WINDOW_SHAPE_H__
--- a/src/compositor/plugins/default.c
+++ b/src/compositor/plugins/default.c
@@ -16,9 +16,7 @@
 * 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.
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
 */

 #include <config.h>
--- a/src/compositor/region-utils.c
+++ b/src/compositor/region-utils.c
@@ -15,9 +15,7 @@
 * 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.
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
 */

 #include "region-utils.h"
--- a/src/compositor/region-utils.h
+++ b/src/compositor/region-utils.h
@@ -15,9 +15,7 @@
 * 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.
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
 */

 #ifndef __META_REGION_UTILS_H__
--- a/src/core/above-tab-keycode.c
+++ b/src/core/above-tab-keycode.c
@@ -15,9 +15,7 @@
 * 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.
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
 */

 /* The standard cycle-windows keybinding should be the key above the
--- a/src/core/barrier.c
+++ b/src/core/barrier.c
@@ -366,11 +366,25 @@ meta_barrier_fire_event (MetaBarrier    *barrier,
 }

 gboolean
-meta_display_process_barrier_event (MetaDisplay    *display,
-                                    XIBarrierEvent *xev)
+meta_display_process_barrier_event (MetaDisplay *display,
+                                    XIEvent     *event)
 {
  MetaBarrier *barrier;
+  XIBarrierEvent *xev;

+  if (event == NULL)
+    return FALSE;
+
+  switch (event->evtype)
+    {
+    case XI_BarrierHit:
+    case XI_BarrierLeave:
+      break;
+    default:
+      return FALSE;
+    }
+
+  xev = (XIBarrierEvent *) event;
  barrier = g_hash_table_lookup (display->xids, &xev->barrier);
  if (barrier != NULL)
    {
--- a/src/core/bell.c
+++ b/src/core/bell.c
@@ -17,9 +17,7 @@
 * 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.
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
 */

 /*
--- a/src/core/bell.h
+++ b/src/core/bell.h
@@ -14,9 +14,7 @@
 * 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.
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
 */

 #include <X11/Xlib.h>
--- a/src/core/boxes-private.h
+++ b/src/core/boxes-private.h
@@ -16,9 +16,7 @@
 * 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.
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
 */

 #ifndef META_BOXES_PRIVATE_H
--- a/src/core/boxes.c
+++ b/src/core/boxes.c
@@ -25,9 +25,7 @@
 * 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.
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
 */

 #include "boxes-private.h"
--- a/src/core/constraints.c
+++ b/src/core/constraints.c
@@ -18,9 +18,7 @@
 * 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.
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
 */

 #include <config.h>
@@ -118,8 +116,6 @@ typedef struct
 {
  MetaRectangle        orig;
  MetaRectangle        current;
-  MetaFrameBorders    *borders;
-  gboolean             must_free_borders;
  ActionType           action_type;
  gboolean             is_user_action;

@@ -195,7 +191,6 @@ static gboolean constrain_partially_onscreen (MetaWindow         *window,

 static void setup_constraint_info        (ConstraintInfo      *info,
                                          MetaWindow          *window,
-                                          MetaFrameBorders    *orig_borders,
                                          MetaMoveResizeFlags  flags,
                                          int                  resize_gravity,
                                          const MetaRectangle *orig,
@@ -204,13 +199,12 @@ static void place_window_if_needed       (MetaWindow     *window,
                                          ConstraintInfo *info);
 static void update_onscreen_requirements (MetaWindow     *window,
                                          ConstraintInfo *info);
-static void extend_by_frame              (MetaRectangle           *rect,
-                                          const MetaFrameBorders  *borders);
-static void unextend_by_frame            (MetaRectangle           *rect,
-                                          const MetaFrameBorders  *borders);
-static inline void get_size_limits       (const MetaWindow        *window,
-                                          const MetaFrameBorders  *borders,
-                                          gboolean include_frame,
+static void extend_by_frame              (MetaWindow     *window,
+                                          MetaRectangle  *rect);
+static void unextend_by_frame            (MetaWindow     *window,
+                                          MetaRectangle  *rect);
+static inline void get_size_limits       (MetaWindow    *window,
+                                          gboolean       include_frame,
                                          MetaRectangle *min_size,
                                          MetaRectangle *max_size);

@@ -280,7 +274,6 @@ do_all_constraints (MetaWindow         *window,

 void
 meta_window_constrain (MetaWindow          *window,
-                       MetaFrameBorders    *orig_borders,
                       MetaMoveResizeFlags  flags,
                       int                  resize_gravity,
                       const MetaRectangle *orig,
@@ -303,7 +296,6 @@ meta_window_constrain (MetaWindow          *window,

  setup_constraint_info (&info,
                         window, 
-                         orig_borders,
                         flags,
                         resize_gravity,
                         orig,
@@ -333,19 +325,11 @@ meta_window_constrain (MetaWindow          *window,
   * if this was a user move or user move-and-resize operation.
   */
  update_onscreen_requirements (window, &info);
-
-  /* Ew, what an ugly way to do things.  Destructors (in a real OOP language,
-   * not gobject-style--gobject would be more pain than it's worth) or
-   * smart pointers would be so much nicer here.  *shrug*
-   */
-  if (info.must_free_borders)
-    g_free (info.borders);
 }

 static void
 setup_constraint_info (ConstraintInfo      *info,
                       MetaWindow          *window,
-                       MetaFrameBorders    *orig_borders,
                       MetaMoveResizeFlags  flags,
                       int                  resize_gravity,
                       const MetaRectangle *orig,
@@ -357,18 +341,6 @@ setup_constraint_info (ConstraintInfo      *info,
  info->orig    = *orig;
  info->current = *new;

-  /* Create a fake frame geometry if none really exists */
-  if (orig_borders && !window->fullscreen)
-    {
-      info->borders = orig_borders;
-      info->must_free_borders = FALSE;
-    }
-  else
-    {
-      info->borders = g_new0 (MetaFrameBorders, 1);
-      info->must_free_borders = TRUE;
-    }
-
  if (flags & META_IS_MOVE_ACTION && flags & META_IS_RESIZE_ACTION)
    info->action_type = ACTION_MOVE_AND_RESIZE;
  else if (flags & META_IS_RESIZE_ACTION)
@@ -519,11 +491,12 @@ place_window_if_needed(MetaWindow     *window,
      !window->minimized &&
      !window->fullscreen)
    {
-      MetaRectangle placed_rect = info->orig;
+      MetaRectangle placed_rect;
      MetaWorkspace *cur_workspace;
      const MetaMonitorInfo *monitor_info;

-      meta_window_place (window, info->borders, info->orig.x, info->orig.y,
+      meta_window_get_frame_rect (window, &placed_rect);
+      meta_window_place (window, info->orig.x, info->orig.y,
                         &placed_rect.x, &placed_rect.y);
      did_placement = TRUE;

@@ -541,6 +514,7 @@ place_window_if_needed(MetaWindow     *window,
        meta_workspace_get_onmonitor_region (cur_workspace, 
                                             monitor_info->number);

+      meta_window_frame_rect_to_client_rect (window, &placed_rect, &placed_rect);

      info->current.x = placed_rect.x;
      info->current.y = placed_rect.y;
@@ -586,10 +560,6 @@ place_window_if_needed(MetaWindow     *window,
                (window->maximize_vertically_after_placement ?
                 META_MAXIMIZE_VERTICAL : 0), &info->current);

-          /* maximization may have changed frame geometry */
-          if (!window->fullscreen)
-            meta_frame_calc_borders (window->frame, info->borders);
-
          if (window->fullscreen_after_placement)
            {
              window->saved_rect = info->current;
@@ -649,7 +619,7 @@ update_onscreen_requirements (MetaWindow     *window,
  /* The require onscreen/on-single-monitor and titlebar_visible
   * stuff is relative to the outer window, not the inner
   */
-  extend_by_frame (&info->current, info->borders);
+  extend_by_frame (window, &info->current);

  /* Update whether we want future constraint runs to require the
   * window to be on fully onscreen.
@@ -682,10 +652,13 @@ update_onscreen_requirements (MetaWindow     *window,
   */
  if (window->frame && window->decorated)
    {
+      MetaFrameBorders borders;
      MetaRectangle titlebar_rect;

+      meta_frame_calc_borders (window->frame, &borders);
+
      titlebar_rect = info->current;
-      titlebar_rect.height = info->borders->visible.top;
+      titlebar_rect.height = borders.visible.top;
      old = window->require_titlebar_visible;
      window->require_titlebar_visible =
        meta_rectangle_overlaps_with_region (info->usable_screen_region,
@@ -698,39 +671,33 @@ update_onscreen_requirements (MetaWindow     *window,
    }

  /* Don't forget to restore the position of the window */
-  unextend_by_frame (&info->current, info->borders);
+  unextend_by_frame (window, &info->current);
 }

 static void
-extend_by_frame (MetaRectangle           *rect,
-                 const MetaFrameBorders *borders)
+extend_by_frame (MetaWindow    *window,
+                 MetaRectangle *rect)
 {
-  rect->x -= borders->visible.left;
-  rect->y -= borders->visible.top;
-  rect->width  += borders->visible.left + borders->visible.right;
-  rect->height += borders->visible.top + borders->visible.bottom;
+  meta_window_client_rect_to_frame_rect (window, rect, rect);
 }

 static void
-unextend_by_frame (MetaRectangle           *rect,
-                   const MetaFrameBorders *borders)
+unextend_by_frame (MetaWindow    *window,
+                   MetaRectangle *rect)
 {
-  rect->x += borders->visible.left;
-  rect->y += borders->visible.top;
-  rect->width  -= borders->visible.left + borders->visible.right;
-  rect->height -= borders->visible.top + borders->visible.bottom;
+  meta_window_frame_rect_to_client_rect (window, rect, rect);
 }

 static inline void
-get_size_limits (const MetaWindow        *window,
-                 const MetaFrameBorders *borders,
-                 gboolean                 include_frame,
+get_size_limits (MetaWindow    *window,
+                 gboolean       include_frame,
                 MetaRectangle *min_size,
                 MetaRectangle *max_size)
 {
  /* We pack the results into MetaRectangle structs just for convienience; we
   * don't actually use the position of those rects.
   */
+  min_size->x = min_size->y = max_size->x = max_size->y = 0;
  min_size->width  = window->size_hints.min_width;
  min_size->height = window->size_hints.min_height;
  max_size->width  = window->size_hints.max_width;
@@ -738,22 +705,8 @@ get_size_limits (const MetaWindow        *window,

  if (include_frame)
    {
-      int fw = borders->visible.left + borders->visible.right;
-      int fh = borders->visible.top + borders->visible.bottom;
-
-      min_size->width  += fw;
-      min_size->height += fh;
-      /* Do check to avoid overflow (e.g. max_size->width & max_size->height
-       * may be set to G_MAXINT by meta_set_normal_hints()).
-       */
-      if (max_size->width < (G_MAXINT - fw))
-        max_size->width += fw;
-      else
-        max_size->width = G_MAXINT;
-      if (max_size->height < (G_MAXINT - fh))
-        max_size->height += fh;
-      else
-        max_size->height = G_MAXINT;
+      meta_window_client_rect_to_frame_rect (window, min_size, min_size);
+      meta_window_client_rect_to_frame_rect (window, max_size, max_size);
    }
 }

@@ -765,18 +718,28 @@ constrain_modal_dialog (MetaWindow         *window,
 {
  int x, y;
  MetaWindow *parent = meta_window_get_transient_for (window);
+  MetaRectangle child_rect, parent_rect;
  gboolean constraint_already_satisfied;

  if (!meta_window_is_attached_dialog (window))
    return TRUE;

-  x = parent->rect.x + (parent->rect.width / 2  - info->current.width / 2);
-  y = parent->rect.y + (parent->rect.height / 2 - info->current.height / 2);
-  if (parent->frame)
-    {
-      x += parent->frame->rect.x;
-      y += parent->frame->rect.y;
-    }
+  /* We want to center the dialog on the parent, including the decorations
+     for both of them. info->current is in client X window coordinates, so we need
+     to convert them to frame coordinates, apply the centering and then
+     convert back to client.
+  */
+
+  child_rect = info->current;
+  extend_by_frame (window, &child_rect);
+
+  meta_window_get_frame_rect (parent, &parent_rect);
+
+  child_rect.x = parent_rect.x + (parent_rect.width / 2  - child_rect.width / 2);
+  child_rect.y = parent_rect.y + (parent_rect.height / 2 - child_rect.height / 2);
+  unextend_by_frame (window, &child_rect);
+  x = child_rect.x;
+  y = child_rect.y;

  constraint_already_satisfied = (x == info->current.x) && (y == info->current.y);

@@ -841,19 +804,19 @@ constrain_maximization (MetaWindow         *window,
      active_workspace_struts = window->screen->active_workspace->all_struts;

      target_size = info->current;
-      extend_by_frame (&target_size, info->borders);
+      extend_by_frame (window, &target_size);
      meta_rectangle_expand_to_avoiding_struts (&target_size,
                                                &info->entire_monitor,
                                                direction,
                                                active_workspace_struts);
   }
  /* Now make target_size = maximized size of client window */
-  unextend_by_frame (&target_size, info->borders);
+  unextend_by_frame (window, &target_size);

  /* Check min size constraints; max size constraints are ignored for maximized
   * windows, as per bug 327543.
   */
-  get_size_limits (window, info->borders, FALSE, &min_size, &max_size);
+  get_size_limits (window, FALSE, &min_size, &max_size);
  hminbad = target_size.width < min_size.width && window->maximized_horizontally;
  vminbad = target_size.height < min_size.height && window->maximized_vertically;
  if (hminbad || vminbad)
@@ -907,12 +870,12 @@ constrain_tiling (MetaWindow         *window,
   * use an external function for the actual calculation
   */
  meta_window_get_current_tile_area (window, &target_size);
-  unextend_by_frame (&target_size, info->borders);
+  unextend_by_frame (window, &target_size);

  /* Check min size constraints; max size constraints are ignored as for
   * maximized windows.
   */
-  get_size_limits (window, info->borders, FALSE, &min_size, &max_size);
+  get_size_limits (window, FALSE, &min_size, &max_size);
  hminbad = target_size.width < min_size.width;
  vminbad = target_size.height < min_size.height;
  if (hminbad || vminbad)
@@ -955,7 +918,7 @@ constrain_fullscreen (MetaWindow         *window,

  monitor = info->entire_monitor;

-  get_size_limits (window, info->borders, FALSE, &min_size, &max_size);
+  get_size_limits (window, FALSE, &min_size, &max_size);
  too_big =   !meta_rectangle_could_fit_rect (&monitor, &min_size);
  too_small = !meta_rectangle_could_fit_rect (&max_size, &monitor);
  if (too_big || too_small)
@@ -1064,7 +1027,7 @@ constrain_size_limits (MetaWindow         *window,
    return TRUE;

  /* Determine whether constraint is already satisfied; exit if it is */
-  get_size_limits (window, info->borders, FALSE, &min_size, &max_size);
+  get_size_limits (window, FALSE, &min_size, &max_size);
  /* We ignore max-size limits for maximized windows; see #327543 */
  if (window->maximized_horizontally)
    max_size.width = MAX (max_size.width, info->current.width);
@@ -1256,8 +1219,8 @@ do_screen_and_monitor_relative_constraints (

  /* Determine whether constraint applies; exit if it doesn't */
  how_far_it_can_be_smushed = info->current;
-  get_size_limits (window, info->borders, TRUE, &min_size, &max_size);
-  extend_by_frame (&info->current, info->borders);
+  get_size_limits (window, TRUE, &min_size, &max_size);
+  extend_by_frame (window, &info->current);

  if (info->action_type != ACTION_MOVE)
    {
@@ -1277,7 +1240,7 @@ do_screen_and_monitor_relative_constraints (
                                        &info->current);
  if (exit_early || constraint_satisfied || check_only)
    {
-      unextend_by_frame (&info->current, info->borders);
+      unextend_by_frame (window, &info->current);
      return constraint_satisfied;
    }

@@ -1301,7 +1264,7 @@ do_screen_and_monitor_relative_constraints (
                                      info->fixed_directions,
                                      &info->current);

-  unextend_by_frame (&info->current, info->borders);
+  unextend_by_frame (window, &info->current);
  return TRUE;
 }

@@ -1414,8 +1377,11 @@ constrain_titlebar_visible (MetaWindow         *window,
   */
  if (window->frame)
    {
-      bottom_amount = info->current.height + info->borders->visible.bottom;
-      vert_amount_onscreen = info->borders->visible.top;
+      MetaFrameBorders borders;
+      meta_frame_calc_borders (window->frame, &borders);
+
+      bottom_amount = info->current.height + borders.visible.bottom;
+      vert_amount_onscreen = borders.visible.top;
    }
  else
    bottom_amount = vert_amount_offscreen;
@@ -1489,8 +1455,11 @@ constrain_partially_onscreen (MetaWindow         *window,
   */
  if (window->frame)
    {
-      bottom_amount = info->current.height + info->borders->visible.bottom;
-      vert_amount_onscreen = info->borders->visible.top;
+      MetaFrameBorders borders;
+      meta_frame_calc_borders (window->frame, &borders);
+
+      bottom_amount = info->current.height + borders.visible.bottom;
+      vert_amount_onscreen = borders.visible.top;
    }
  else
    bottom_amount = vert_amount_offscreen;
--- a/src/core/constraints.h
+++ b/src/core/constraints.h
@@ -17,9 +17,7 @@
 * 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.
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
 */

 #ifndef META_CONSTRAINTS_H
@@ -40,7 +38,6 @@ typedef enum
 } MetaMoveResizeFlags;

 void meta_window_constrain (MetaWindow          *window,
-                            MetaFrameBorders    *orig_borders,
                            MetaMoveResizeFlags  flags,
                            int                  resize_gravity,
                            const MetaRectangle *orig,
--- a/src/core/core.c
+++ b/src/core/core.c
@@ -18,9 +18,7 @@
 * 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.
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
 */

 #include <config.h>
@@ -172,6 +170,7 @@ meta_core_queue_frame_resize (Display *xdisplay,
  MetaWindow *window = get_window (xdisplay, frame_xwindow);

  meta_window_queue (window, META_QUEUE_MOVE_RESIZE);
+  meta_window_frame_size_changed (window);
 }

 void
@@ -282,8 +281,7 @@ meta_core_lower_beneath_grab_window (Display *xdisplay,
    return;

  changes.stack_mode = Below;
-  changes.sibling = grab_window->frame ? grab_window->frame->xwindow
-                                       : grab_window->xwindow;
+  changes.sibling = meta_window_get_toplevel_xwindow (grab_window);

  stack_window.any.type = META_WINDOW_CLIENT_TYPE_X11;
  stack_window.x11.xwindow = xwindow;
--- a/src/core/core.h
+++ b/src/core/core.h
@@ -17,9 +17,7 @@
 * 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.
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
 */

 #ifndef META_CORE_H
--- a/src/core/delete.c
+++ b/src/core/delete.c
@@ -17,9 +17,7 @@
 * 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.
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
 */

 #define _XOPEN_SOURCE /* for kill() */
@@ -43,14 +41,11 @@ static void meta_window_present_delete_dialog (MetaWindow *window,
                                               guint32     timestamp);

 static void
-delete_ping_reply_func (MetaDisplay *display,
-                        Window       xwindow,
+delete_ping_reply_func (MetaWindow  *window,
                        guint32      timestamp,
                        void        *user_data)
 {
-  meta_topic (META_DEBUG_PING,
-              "Got reply to delete ping for %s\n",
-              ((MetaWindow*)user_data)->desc);
+  meta_topic (META_DEBUG_PING, "Got reply to delete ping for %s\n", window->desc);

  /* we do nothing */
 }
@@ -68,12 +63,10 @@ dialog_exited (GPid pid, int status, gpointer user_data)
 }

 static void
-delete_ping_timeout_func (MetaDisplay *display,
-                          Window       xwindow,
+delete_ping_timeout_func (MetaWindow  *window,
                          guint32      timestamp,
                          void        *user_data)
 {
-  MetaWindow *window = user_data;
  char *window_title;
  gchar *window_content, *tmp;
  GPid dialog_pid;
@@ -137,12 +130,11 @@ void
 meta_window_check_alive (MetaWindow *window,
                         guint32     timestamp)
 {
-  meta_display_ping_window (window->display,
-                            window,
-                            timestamp,
-                            delete_ping_reply_func,
-                            delete_ping_timeout_func,
-                            window);
+  meta_window_ping (window,
+                    timestamp,
+                    delete_ping_reply_func,
+                    delete_ping_timeout_func,
+                    NULL);
 }

 void
--- a/src/core/display-private.h
+++ b/src/core/display-private.h
@@ -19,9 +19,7 @@
 * 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.
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
 */

 #ifndef META_DISPLAY_PRIVATE_H
@@ -39,6 +37,7 @@
 #include "keybindings-private.h"
 #include <meta/prefs.h>
 #include <meta/barrier.h>
+#include <clutter/clutter.h>

 #ifdef HAVE_STARTUP_NOTIFICATION
 #include <libsn/sn.h>
@@ -56,11 +55,6 @@ typedef struct _MetaWindowPropHooks MetaWindowPropHooks;

 typedef struct MetaEdgeResistanceData MetaEdgeResistanceData;

-typedef void (* MetaWindowPingFunc) (MetaDisplay *display,
-				     Window       xwindow,
-				     guint32      timestamp,
-				     gpointer     user_data);
-
 typedef enum {
  META_LIST_DEFAULT                   = 0,      /* normal windows */
  META_LIST_INCLUDE_OVERRIDE_REDIRECT = 1 << 0, /* normal and O-R */
@@ -101,6 +95,8 @@ struct _MetaDisplay
  char *name;
  Display *xdisplay;

+  int clutter_event_filter;
+
  Window leader_window;
  Window timestamp_pinging_window;

@@ -147,6 +143,14 @@ struct _MetaDisplay
   */
  guint allow_terminal_deactivation : 1;

+  /* If true, server->focus_serial refers to us changing the focus; in
+   * this case, we can ignore focus events that have exactly focus_serial,
+   * since we take care to make another request immediately afterwards.
+   * But if focus is being changed by another client, we have to accept
+   * multiple events with the same serial.
+   */
+  guint focused_by_us : 1;
+
  guint static_gravity_works : 1;
  
  /*< private-ish >*/
@@ -179,7 +183,7 @@ struct _MetaDisplay
  guint32 window_sequence_counter;

  /* Pings which we're waiting for a reply from */
-  GSList     *pending_pings;
+  GHashTable *pending_pings;

  /* Pending focus change */
  guint       focus_timeout_id;
@@ -189,7 +193,7 @@ struct _MetaDisplay
  MetaWindow* autoraise_window;

  /* Alt+click button grabs */
-  unsigned int window_grab_modifiers;
+  ClutterModifierType window_grab_modifiers;
  
  /* current window operation */
  MetaGrabOp  grab_op;
@@ -445,15 +449,6 @@ void meta_display_retheme_all (void);
 void meta_display_set_cursor_theme (const char *theme, 
 				    int         size);

-void meta_display_ping_window      (MetaDisplay        *display,
-                                    MetaWindow         *window,
-                                    guint32             timestamp,
-                                    MetaWindowPingFunc  ping_reply_func,
-                                    MetaWindowPingFunc  ping_timeout_func,
-                                    void               *user_data);
-gboolean meta_display_window_has_pending_pings (MetaDisplay        *display,
-						MetaWindow         *window);
-
 int meta_resize_gravity_from_grab_op (MetaGrabOp op);

 gboolean meta_grab_op_is_moving   (MetaGrabOp op);
@@ -473,21 +468,17 @@ void meta_display_queue_autoraise_callback  (MetaDisplay *display,
 void meta_display_remove_autoraise_callback (MetaDisplay *display);

 void meta_display_overlay_key_activate (MetaDisplay *display);
-void meta_display_accelerator_activate (MetaDisplay *display,
-                                        guint        action,
-                                        guint        deviceid,
-                                        guint        timestamp);
+void meta_display_accelerator_activate (MetaDisplay     *display,
+                                        guint            action,
+                                        ClutterKeyEvent *event);
 gboolean meta_display_modifiers_accelerator_activate (MetaDisplay *display);

 /* In above-tab-keycode.c */
 guint meta_display_get_above_tab_keycode (MetaDisplay *display);

-gboolean meta_display_handle_event (MetaDisplay *display,
-                                    XEvent      *event);
-
 #ifdef HAVE_XI23
-gboolean meta_display_process_barrier_event (MetaDisplay    *display,
-                                             XIBarrierEvent *event);
+gboolean meta_display_process_barrier_event (MetaDisplay *display,
+                                             XIEvent     *event);
 #endif /* HAVE_XI23 */

 void meta_display_set_input_focus_xwindow (MetaDisplay   *display,
--- a/src/core/display.c
+++ b/src/core/display.c
--- a/src/core/edge-resistance.c
+++ b/src/core/edge-resistance.c
@@ -16,9 +16,7 @@
 * 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.
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
 */

 #include <config.h>
@@ -985,7 +983,7 @@ compute_resistance_and_snapping_edges (MetaDisplay *display)
        {
          MetaRectangle *new_rect;
          new_rect = g_new (MetaRectangle, 1);
-          meta_window_get_outer_rect (cur_window, new_rect);
+          meta_window_get_frame_rect (cur_window, new_rect);
          obscuring_windows = g_slist_prepend (obscuring_windows, new_rect);
          window_stacking = 
            g_slist_prepend (window_stacking, GINT_TO_POINTER (stack_position));
@@ -1010,7 +1008,7 @@ compute_resistance_and_snapping_edges (MetaDisplay *display)
    {
      MetaRectangle  cur_rect;
      MetaWindow    *cur_window = cur_window_iter->data;
-      meta_window_get_outer_rect (cur_window, &cur_rect);
+      meta_window_get_frame_rect (cur_window, &cur_rect);

      /* Check if we want to use this window's edges for edge
       * resistance (note that dock edges are considered screen edges
@@ -1151,7 +1149,7 @@ meta_window_edge_resistance_for_move (MetaWindow  *window,
  MetaRectangle old_outer, proposed_outer, new_outer;
  gboolean is_resize;

-  meta_window_get_outer_rect (window, &old_outer);
+  meta_window_get_frame_rect (window, &old_outer);

  proposed_outer = old_outer;
  proposed_outer.x += (*new_x - old_x);
@@ -1237,7 +1235,7 @@ meta_window_edge_resistance_for_resize (MetaWindow  *window,
  int proposed_outer_width, proposed_outer_height;
  gboolean is_resize;

-  meta_window_get_outer_rect (window, &old_outer);
+  meta_window_get_frame_rect (window, &old_outer);
  proposed_outer_width  = old_outer.width  + (*new_width  - old_width);
  proposed_outer_height = old_outer.height + (*new_height - old_height);
  meta_rectangle_resize_with_gravity (&old_outer, 
--- a/src/core/edge-resistance.h
+++ b/src/core/edge-resistance.h
@@ -16,9 +16,7 @@
 * 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.
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
 */

 #ifndef META_EDGE_RESISTANCE_H
--- a/src/core/errors.c
+++ b/src/core/errors.c
@@ -15,9 +15,7 @@
 * 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.
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
 */

 /**
--- a/src/core/frame.c
+++ b/src/core/frame.c
@@ -18,9 +18,7 @@
 * 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.
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
 */

 #include <config.h>
@@ -52,9 +50,6 @@ meta_window_ensure_frame (MetaWindow *window)
  if (window->frame)
    return;
  
-  /* See comment below for why this is required. */
-  meta_display_grab (window->display);
-  
  frame = g_new (MetaFrame, 1);

  frame->window = window;
@@ -69,6 +64,7 @@ meta_window_ensure_frame (MetaWindow *window)

  frame->mapped = FALSE;
  frame->is_flashing = FALSE;
+  frame->borders_cached = FALSE;
  
  meta_verbose ("Framing window %s: visual %s default, depth %d default depth %d\n",
                window->desc,
@@ -119,14 +115,6 @@ meta_window_ensure_frame (MetaWindow *window)
  
  meta_display_register_x_window (window->display, &frame->xwindow, window);

-  /* Reparent the client window; it may be destroyed,
-   * thus the error trap. We'll get a destroy notify later
-   * and free everything. Comment in FVWM source code says
-   * we need a server grab or the child can get its MapNotify
-   * before we've finished reparenting and getting the decoration
-   * window onscreen, so ensure_frame must be called with
-   * a grab.
-   */
  meta_error_trap_push (window->display);
  if (window->mapped)
    {
@@ -169,8 +157,6 @@ meta_window_ensure_frame (MetaWindow *window)

  /* Move keybindings to frame instead of window */
  meta_window_grab_keys (window);
-
-  meta_display_ungrab (window->display);
 }

 void
@@ -334,9 +320,23 @@ meta_frame_calc_borders (MetaFrame        *frame,
  if (frame == NULL)
    meta_frame_borders_clear (borders);
  else
-    meta_ui_get_frame_borders (frame->window->screen->ui,
-                               frame->xwindow,
-                               borders);
+    {
+      if (!frame->borders_cached)
+        {
+          meta_ui_get_frame_borders (frame->window->screen->ui,
+                                     frame->xwindow,
+                                     &frame->cached_borders);
+          frame->borders_cached = TRUE;
+        }
+
+      *borders = frame->cached_borders;
+    }
+}
+
+void
+meta_frame_clear_cached_borders (MetaFrame *frame)
+{
+  frame->borders_cached = FALSE;
 }

 gboolean
--- a/src/core/frame.h
+++ b/src/core/frame.h
@@ -16,9 +16,7 @@
 * 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.
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
 */

 #ifndef META_FRAME_PRIVATE_H
@@ -41,6 +39,8 @@ struct _MetaFrame
   */
  MetaRectangle rect;

+  MetaFrameBorders cached_borders; /* valid if borders_cached is set */
+
  /* position of client, size of frame */
  int child_x;
  int child_y;
@@ -50,6 +50,7 @@ struct _MetaFrame
  guint mapped : 1;
  guint need_reapply_frame_shape : 1;
  guint is_flashing : 1; /* used by the visual bell flash */
+  guint borders_cached : 1;
 };

 void     meta_window_ensure_frame           (MetaWindow *window);
@@ -68,6 +69,8 @@ gboolean meta_frame_sync_to_window (MetaFrame         *frame,
                                    gboolean           need_move,
                                    gboolean           need_resize);

+void meta_frame_clear_cached_borders (MetaFrame *frame);
+
 cairo_region_t *meta_frame_get_frame_bounds (MetaFrame *frame);

 void meta_frame_get_mask (MetaFrame *frame,
--- a/src/core/group-private.h
+++ b/src/core/group-private.h
@@ -16,9 +16,7 @@
 * 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.
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
 */

 #ifndef META_GROUP_PRIVATE_H
--- a/src/core/group-props.c
+++ b/src/core/group-props.c
@@ -16,9 +16,7 @@
 * 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.
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
 */

 #include <config.h>
--- a/src/core/group-props.h
+++ b/src/core/group-props.h
@@ -16,9 +16,7 @@
 * 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.
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
 */

 #ifndef META_GROUP_PROPS_H
--- a/src/core/group.c
+++ b/src/core/group.c
@@ -15,9 +15,7 @@
 * 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.
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
 */

 /**
--- a/src/core/iconcache.c
+++ b/src/core/iconcache.c
@@ -16,9 +16,7 @@
 * 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.
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
 */

 #include <config.h>
--- a/src/core/iconcache.h
+++ b/src/core/iconcache.h
@@ -16,9 +16,7 @@
 * 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.
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
 */

 #ifndef META_ICON_CACHE_H
--- a/src/core/keybindings-private.h
+++ b/src/core/keybindings-private.h
@@ -21,9 +21,7 @@
 * 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.
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
 */

 #ifndef META_KEYBINDINGS_PRIVATE_H
@@ -66,9 +64,9 @@ gboolean meta_window_grab_all_keys          (MetaWindow  *window,
                                             guint32      timestamp);
 void     meta_window_ungrab_all_keys        (MetaWindow  *window,
                                             guint32      timestamp);
-gboolean meta_display_process_key_event     (MetaDisplay   *display,
-                                             MetaWindow    *window,
-                                             XIDeviceEvent *event);
+gboolean meta_display_process_key_event     (MetaDisplay     *display,
+                                             MetaWindow      *window,
+                                             ClutterKeyEvent *event);
 void     meta_display_process_mapping_event (MetaDisplay *display,
                                             XEvent      *event);

@@ -81,7 +79,3 @@ gboolean meta_prefs_remove_keybinding       (const char    *name);


 #endif
-
-
-
-
--- a/src/core/keybindings.c
+++ b/src/core/keybindings.c
--- a/src/core/main.c
+++ b/src/core/main.c
@@ -17,9 +17,7 @@
 * 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.
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
 */

 /**
--- a/src/core/meta-cursor-tracker-private.h
+++ b/src/core/meta-cursor-tracker-private.h
@@ -14,9 +14,7 @@
 * 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.
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
 *
 * Author: Giovanni Campagna <gcampagn@redhat.com>
 */
@@ -31,18 +29,18 @@
 gboolean meta_cursor_tracker_handle_xevent (MetaCursorTracker *tracker,
 					    XEvent            *xevent);

-void     meta_cursor_tracker_set_root_cursor (MetaCursorTracker *tracker,
-                                              MetaCursor         cursor);
-void     meta_cursor_tracker_revert_root     (MetaCursorTracker *tracker);
-void     meta_cursor_tracker_set_buffer      (MetaCursorTracker  *tracker,
-                                              struct wl_resource *buffer,
-                                              int                 hot_x,
-                                              int                 hot_y);
+void     meta_cursor_tracker_set_grab_cursor     (MetaCursorTracker  *tracker,
+                                                  MetaCursor          cursor);
+void     meta_cursor_tracker_set_window_cursor   (MetaCursorTracker  *tracker,
+                                                  struct wl_resource *buffer,
+                                                  int                 hot_x,
+                                                  int                 hot_y);
+void     meta_cursor_tracker_unset_window_cursor (MetaCursorTracker  *tracker);
+void     meta_cursor_tracker_set_root_cursor     (MetaCursorTracker  *tracker,
+                                                  MetaCursor          cursor);

 void     meta_cursor_tracker_update_position (MetaCursorTracker *tracker,
 					      int                new_x,
 					      int                new_y);
 void     meta_cursor_tracker_paint           (MetaCursorTracker *tracker);
-void     meta_cursor_tracker_queue_redraw    (MetaCursorTracker *tracker,
-					      ClutterActor      *stage);
 #endif
--- a/src/core/meta-cursor-tracker.c
+++ b/src/core/meta-cursor-tracker.c
@@ -14,9 +14,7 @@
 * 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.
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
 *
 * Author: Giovanni Campagna <gcampagn@redhat.com>
 */
@@ -68,11 +66,34 @@ struct _MetaCursorTracker {
  MetaScreen *screen;

  gboolean is_showing;
-  gboolean has_cursor;
  gboolean has_hw_cursor;

-  MetaCursorReference *sprite;
+  /* The cursor tracker stores the cursor for the current grab
+   * operation, the cursor for the window with pointer focus, and
+   * the cursor for the root window, which contains either the
+   * default arrow cursor or the 'busy' hourglass if we're launching
+   * an app.
+   *
+   * We choose the first one available -- if there's a grab cursor,
+   * we choose that cursor, if there's window cursor, we choose that,
+   * otherwise we choose the root cursor.
+   *
+   * The displayed_cursor contains the chosen cursor.
+   */
+  MetaCursorReference *displayed_cursor;
+
+  MetaCursorReference *grab_cursor;
+
+  /* Wayland clients can set a NULL buffer as their cursor 
+   * explicitly, which means that we shouldn't display anything.
+   * So, we can't simply store a NULL in window_cursor to
+   * determine an unset window cursor; we need an extra boolean.
+   */
+  gboolean has_window_cursor;
+  MetaCursorReference *window_cursor;
+
  MetaCursorReference *root_cursor;
+
  MetaCursorReference *default_cursors[META_CURSOR_LAST];

  int current_x, current_y;
@@ -98,12 +119,10 @@ enum {

 static guint signals[LAST_SIGNAL];

-static void meta_cursor_tracker_set_sprite (MetaCursorTracker   *tracker,
-                                            MetaCursorReference *sprite);
-
 static void meta_cursor_tracker_set_crtc_has_hw_cursor (MetaCursorTracker *tracker,
                                                        MetaCRTC          *crtc,
                                                        gboolean           has_hw_cursor);
+static void sync_cursor (MetaCursorTracker *tracker);

 static MetaCursorReference *
 meta_cursor_reference_ref (MetaCursorReference *self)
@@ -286,7 +305,6 @@ meta_cursor_reference_from_theme (MetaCursorTracker  *tracker,
  self->texture = cogl_texture_2d_new_from_data (cogl_context,
                                                 width, height,
                                                 cogl_format,
-                                                 COGL_PIXEL_FORMAT_ANY,
                                                 rowstride,
                                                 (uint8_t*)image->pixels,
                                                 NULL);
@@ -346,7 +364,7 @@ meta_cursor_reference_from_buffer (MetaCursorTracker  *tracker,
  ClutterBackend *backend;
  CoglContext *cogl_context;
  MetaCursorReference *self;
-  CoglPixelFormat cogl_format, cogl_internal_format;
+  CoglPixelFormat cogl_format;
  struct wl_shm_buffer *shm_buffer;
  uint32_t gbm_format;

@@ -354,7 +372,7 @@ meta_cursor_reference_from_buffer (MetaCursorTracker  *tracker,
  self->ref_count = 1;
  self->hot_x = hot_x;
  self->hot_y = hot_y;
- 
+
  backend = clutter_get_default_backend ();
  cogl_context = clutter_backend_get_cogl_context (backend);

@@ -370,37 +388,31 @@ meta_cursor_reference_from_buffer (MetaCursorTracker  *tracker,
 #if G_BYTE_ORDER == G_BIG_ENDIAN
          case WL_SHM_FORMAT_ARGB8888:
            cogl_format = COGL_PIXEL_FORMAT_ARGB_8888_PRE;
-            cogl_internal_format = COGL_PIXEL_FORMAT_ANY;
            gbm_format = GBM_FORMAT_ARGB8888;
            break;
          case WL_SHM_FORMAT_XRGB8888:
            cogl_format = COGL_PIXEL_FORMAT_ARGB_8888;
-            cogl_internal_format = COGL_PIXEL_FORMAT_RGB_888;
            gbm_format = GBM_FORMAT_XRGB8888;
            break;
 #else
          case WL_SHM_FORMAT_ARGB8888:
            cogl_format = COGL_PIXEL_FORMAT_BGRA_8888_PRE;
-            cogl_internal_format = COGL_PIXEL_FORMAT_ANY;
            gbm_format = GBM_FORMAT_ARGB8888;
            break;
          case WL_SHM_FORMAT_XRGB8888:
            cogl_format = COGL_PIXEL_FORMAT_BGRA_8888;
-            cogl_internal_format = COGL_PIXEL_FORMAT_BGR_888;
            gbm_format = GBM_FORMAT_XRGB8888;
            break;
 #endif
          default:
            g_warn_if_reached ();
            cogl_format = COGL_PIXEL_FORMAT_ARGB_8888;
-            cogl_internal_format = COGL_PIXEL_FORMAT_ANY;
            gbm_format = GBM_FORMAT_ARGB8888;
        }

      self->texture = cogl_texture_2d_new_from_data (cogl_context,
                                                     width, height,
                                                     cogl_format,
-                                                     cogl_internal_format,
                                                     rowstride,
                                                     wl_shm_buffer_get_data (shm_buffer),
                                                     NULL);
@@ -456,47 +468,10 @@ meta_cursor_reference_from_buffer (MetaCursorTracker  *tracker,

      if (tracker->gbm)
        {
-          cogl_format = cogl_texture_get_format (COGL_TEXTURE (self->texture));
-          switch (cogl_format)
-            {
-#if G_BYTE_ORDER == G_LITTLE_ENDIAN
-            case COGL_PIXEL_FORMAT_ARGB_8888_PRE:
-            case COGL_PIXEL_FORMAT_ARGB_8888:
-              gbm_format = GBM_FORMAT_BGRA8888;
-              break;
-            case COGL_PIXEL_FORMAT_BGRA_8888_PRE:
-            case COGL_PIXEL_FORMAT_BGRA_8888:
-              break;
-            case COGL_PIXEL_FORMAT_RGB_888:
-              break;
-#else
-            case COGL_PIXEL_FORMAT_ARGB_8888_PRE:
-            case COGL_PIXEL_FORMAT_ARGB_8888:
-              gbm_format = GBM_FORMAT_ARGB8888;
-              break;
-            case COGL_PIXEL_FORMAT_BGRA_8888_PRE:
-            case COGL_PIXEL_FORMAT_BGRA_8888:
-              gbm_format = GBM_FORMAT_BGRA8888;
-              break;
-            case COGL_PIXEL_FORMAT_RGB_888:
-              gbm_format = GBM_FORMAT_RGB888;
-              break;
-#endif
-            default:
-              meta_warning ("Unknown cogl format %d\n", cogl_format);
-              return self;
-            }
-
-          if (gbm_device_is_format_supported (tracker->gbm, gbm_format,
-                                              GBM_BO_USE_CURSOR_64X64))
-            {
-              self->bo = gbm_bo_import (tracker->gbm, GBM_BO_IMPORT_WL_BUFFER,
-                                        buffer, GBM_BO_USE_CURSOR_64X64);
-              if (!self->bo)
-                meta_warning ("Importing HW cursor from wl_buffer failed\n");
-            }
-          else
-            meta_warning ("HW cursor for format %d not supported\n", gbm_format);
+          self->bo = gbm_bo_import (tracker->gbm, GBM_BO_IMPORT_WL_BUFFER,
+                                    buffer, GBM_BO_USE_CURSOR_64X64);
+          if (!self->bo)
+            meta_warning ("Importing HW cursor from wl_buffer failed\n");
        }
     }

@@ -520,8 +495,8 @@ meta_cursor_tracker_finalize (GObject *object)
  MetaCursorTracker *self = META_CURSOR_TRACKER (object);
  int i;

-  if (self->sprite)
-    meta_cursor_reference_unref (self->sprite);
+  if (self->displayed_cursor)
+    meta_cursor_reference_unref (self->displayed_cursor);
  if (self->root_cursor)
    meta_cursor_reference_unref (self->root_cursor);

@@ -595,9 +570,12 @@ make_wayland_cursor_tracker (MetaScreen *screen)
  compositor = meta_wayland_compositor_get_default ();
  compositor->seat->cursor_tracker = self;

-  self->drm_fd = compositor->drm_fd;
-  if (self->drm_fd >= 0)
-    self->gbm = gbm_create_device (compositor->drm_fd);
+  if (meta_wayland_compositor_is_native (compositor))
+    {
+      CoglRenderer *cogl_renderer = cogl_display_get_renderer (cogl_context_get_display (ctx));
+      self->drm_fd = cogl_kms_renderer_get_kms_fd (cogl_renderer);
+      self->gbm = gbm_create_device (self->drm_fd);
+    }

  monitors = meta_monitor_manager_get ();
  g_signal_connect_object (monitors, "monitors-changed",
@@ -646,6 +624,18 @@ meta_cursor_tracker_get_for_screen (MetaScreen *screen)
  return self;
 }

+static void
+set_window_cursor (MetaCursorTracker   *tracker,
+                   gboolean             has_cursor,
+                   MetaCursorReference *cursor)
+{
+  g_clear_pointer (&tracker->window_cursor, meta_cursor_reference_unref);
+  if (cursor)
+    tracker->window_cursor = meta_cursor_reference_ref (cursor);
+  tracker->has_window_cursor = has_cursor;
+  sync_cursor (tracker);
+}
+
 gboolean
 meta_cursor_tracker_handle_xevent (MetaCursorTracker *tracker,
                                   XEvent            *xevent)
@@ -662,8 +652,7 @@ meta_cursor_tracker_handle_xevent (MetaCursorTracker *tracker,
  if (notify_event->subtype != XFixesDisplayCursorNotify)
    return FALSE;

-  g_clear_pointer (&tracker->sprite, meta_cursor_reference_unref);
-  g_signal_emit (tracker, signals[CURSOR_CHANGED], 0);
+  set_window_cursor (tracker, FALSE, NULL);

  return TRUE;
 }
@@ -677,7 +666,7 @@ ensure_xfixes_cursor (MetaCursorTracker *tracker)
  gboolean free_cursor_data;
  CoglContext *ctx;

-  if (tracker->sprite)
+  if (tracker->has_window_cursor)
    return;

  cursor_image = XFixesGetCursorImage (tracker->screen->display->xdisplay);
@@ -715,7 +704,6 @@ ensure_xfixes_cursor (MetaCursorTracker *tracker)
                                          cursor_image->width,
                                          cursor_image->height,
                                          CLUTTER_CAIRO_FORMAT_ARGB32,
-                                          COGL_PIXEL_FORMAT_ANY,
                                          cursor_image->width * 4, /* stride */
                                          cursor_data,
                                          NULL);
@@ -725,9 +713,11 @@ ensure_xfixes_cursor (MetaCursorTracker *tracker)

  if (sprite != NULL)
    {
-      tracker->sprite = meta_cursor_reference_take_texture (sprite);
-      tracker->sprite->hot_x = cursor_image->xhot;
-      tracker->sprite->hot_y = cursor_image->yhot;
+      MetaCursorReference *cursor = meta_cursor_reference_take_texture (sprite);
+      cursor->hot_x = cursor_image->xhot;
+      cursor->hot_y = cursor_image->yhot;
+
+      set_window_cursor (tracker, TRUE, cursor);
    }
  XFree (cursor_image);
 }
@@ -745,8 +735,8 @@ meta_cursor_tracker_get_sprite (MetaCursorTracker *tracker)
  if (!meta_is_wayland_compositor ())
    ensure_xfixes_cursor (tracker);

-  if (tracker->sprite)
-    return COGL_TEXTURE (tracker->sprite->texture);
+  if (tracker->displayed_cursor)
+    return COGL_TEXTURE (tracker->displayed_cursor->texture);
  else
    return NULL;
 }
@@ -768,12 +758,13 @@ meta_cursor_tracker_get_hot (MetaCursorTracker *tracker,
  if (!meta_is_wayland_compositor ())
    ensure_xfixes_cursor (tracker);

-  if (tracker->sprite)
+  if (tracker->displayed_cursor)
    {
+      MetaCursorReference *displayed_cursor = tracker->displayed_cursor;
      if (x)
-        *x = tracker->sprite->hot_x;
+        *x = displayed_cursor->hot_x;
      if (y)
-        *y = tracker->sprite->hot_y;
+        *y = displayed_cursor->hot_y;
    }
  else
    {
@@ -788,14 +779,46 @@ static MetaCursorReference *
 ensure_wayland_cursor (MetaCursorTracker *tracker,
                       MetaCursor         cursor)
 {
-  if (tracker->default_cursors[cursor])
-    return tracker->default_cursors[cursor];
-
-  tracker->default_cursors[cursor] = meta_cursor_reference_from_theme (tracker, cursor);
  if (!tracker->default_cursors[cursor])
-    meta_warning ("Failed to load cursor from theme\n");
+    {
+      tracker->default_cursors[cursor] = meta_cursor_reference_from_theme (tracker, cursor);
+      if (!tracker->default_cursors[cursor])
+        meta_warning ("Failed to load cursor from theme\n");
+    }

-  return tracker->default_cursors[cursor];
+  return meta_cursor_reference_ref (tracker->default_cursors[cursor]);
+}
+
+void
+meta_cursor_tracker_set_grab_cursor (MetaCursorTracker *tracker,
+                                     MetaCursor         cursor)
+{
+  g_clear_pointer (&tracker->grab_cursor, meta_cursor_reference_unref);
+  if (cursor != META_CURSOR_DEFAULT)
+    tracker->grab_cursor = ensure_wayland_cursor (tracker, cursor);
+  sync_cursor (tracker);
+}
+
+void
+meta_cursor_tracker_set_window_cursor (MetaCursorTracker  *tracker,
+                                       struct wl_resource *buffer,
+                                       int                 hot_x,
+                                       int                 hot_y)
+{
+  MetaCursorReference *cursor;
+
+  if (buffer)
+    cursor = meta_cursor_reference_from_buffer (tracker, buffer, hot_x, hot_y);
+  else
+    cursor = NULL;
+
+  set_window_cursor (tracker, TRUE, cursor);
+}
+
+void
+meta_cursor_tracker_unset_window_cursor (MetaCursorTracker *tracker)
+{
+  set_window_cursor (tracker, FALSE, NULL);
 }

 void
@@ -815,21 +838,12 @@ meta_cursor_tracker_set_root_cursor (MetaCursorTracker *tracker,
  /* Now update the real root cursor */
  if (meta_is_wayland_compositor ())
    {
-      MetaCursorReference *ref;
-
-      ref = ensure_wayland_cursor (tracker, cursor);
-
      g_clear_pointer (&tracker->root_cursor, meta_cursor_reference_unref);
-      tracker->root_cursor = meta_cursor_reference_ref (ref);
+      tracker->root_cursor = ensure_wayland_cursor (tracker, cursor);
+      sync_cursor (tracker);
    }
 }

-void
-meta_cursor_tracker_revert_root (MetaCursorTracker *tracker)
-{
-  meta_cursor_tracker_set_sprite (tracker, tracker->root_cursor);
-}
-
 static void
 update_hw_cursor (MetaCursorTracker *tracker)
 {
@@ -838,7 +852,7 @@ update_hw_cursor (MetaCursorTracker *tracker)
  unsigned int i, n_crtcs;
  gboolean enabled;

-  enabled = tracker->has_cursor && tracker->sprite->bo != NULL;
+  enabled = tracker->displayed_cursor && tracker->displayed_cursor->bo != NULL;
  tracker->has_hw_cursor = enabled;

  monitors = meta_monitor_manager_get ();
@@ -884,105 +898,51 @@ move_hw_cursor (MetaCursorTracker *tracker)
    }
 }

-void
-meta_cursor_tracker_set_buffer (MetaCursorTracker  *tracker,
-                                struct wl_resource *buffer,
-                                int                 hot_x,
-                                int                 hot_y)
+static MetaCursorReference *
+get_displayed_cursor (MetaCursorTracker *tracker)
 {
-  MetaCursorReference *new_cursor;
+  if (!tracker->is_showing)
+    return NULL;

-  if (buffer)
-    {
-      new_cursor = meta_cursor_reference_from_buffer (tracker, buffer, hot_x, hot_y);
-      meta_cursor_tracker_set_sprite (tracker, new_cursor);
-      meta_cursor_reference_unref (new_cursor);
-    }
-  else
-    meta_cursor_tracker_set_sprite (tracker, NULL);
+  if (tracker->grab_cursor)
+    return tracker->grab_cursor;
+
+  if (tracker->has_window_cursor)
+    return tracker->window_cursor;
+
+  return tracker->root_cursor;
 }

 static void
-meta_cursor_tracker_set_sprite (MetaCursorTracker   *tracker,
-                                MetaCursorReference *sprite)
+sync_displayed_cursor (MetaCursorTracker *tracker)
 {
-  g_assert (meta_is_wayland_compositor ());
+  MetaCursorReference *displayed_cursor = get_displayed_cursor (tracker);

-  if (sprite == tracker->sprite)
+  if (tracker->displayed_cursor == displayed_cursor)
    return;

-  g_clear_pointer (&tracker->sprite, meta_cursor_reference_unref);
+  g_clear_pointer (&tracker->displayed_cursor, meta_cursor_reference_unref);
+  if (displayed_cursor)
+    tracker->displayed_cursor = meta_cursor_reference_ref (displayed_cursor);

-  if (sprite)
+  if (meta_is_wayland_compositor ())
    {
-      tracker->sprite = meta_cursor_reference_ref (sprite);
-      cogl_pipeline_set_layer_texture (tracker->pipeline, 0, COGL_TEXTURE (tracker->sprite->texture));
-    }
-  else
-    cogl_pipeline_set_layer_texture (tracker->pipeline, 0, NULL);
+      if (displayed_cursor)
+        cogl_pipeline_set_layer_texture (tracker->pipeline, 0, COGL_TEXTURE (displayed_cursor->texture));
+      else
+        cogl_pipeline_set_layer_texture (tracker->pipeline, 0, NULL);

-  tracker->has_cursor = tracker->sprite != NULL && tracker->is_showing;
-  update_hw_cursor (tracker);
+      update_hw_cursor (tracker);
+    }

  g_signal_emit (tracker, signals[CURSOR_CHANGED], 0);
-
-  meta_cursor_tracker_update_position (tracker, tracker->current_x, tracker->current_y);
 }

-void
-meta_cursor_tracker_update_position (MetaCursorTracker *tracker,
-                                     int                new_x,
-                                     int                new_y)
-{
-  g_assert (meta_is_wayland_compositor ());
-
-  tracker->current_x = new_x;
-  tracker->current_y = new_y;
-
-  if (tracker->sprite)
-    {
-      tracker->current_rect.x = tracker->current_x - tracker->sprite->hot_x;
-      tracker->current_rect.y = tracker->current_y - tracker->sprite->hot_y;
-      tracker->current_rect.width = cogl_texture_get_width (COGL_TEXTURE (tracker->sprite->texture));
-      tracker->current_rect.height = cogl_texture_get_height (COGL_TEXTURE (tracker->sprite->texture));
-    }
-  else
-    {
-      tracker->current_rect.x = 0;
-      tracker->current_rect.y = 0;
-      tracker->current_rect.width = 0;
-      tracker->current_rect.height = 0;
-    }
-
-  if (tracker->has_hw_cursor)
-    move_hw_cursor (tracker);
-}
-
-void
-meta_cursor_tracker_paint (MetaCursorTracker *tracker)
-{
-  g_assert (meta_is_wayland_compositor ());
-
-  if (tracker->has_hw_cursor || !tracker->has_cursor)
-    return;
-
-  cogl_framebuffer_draw_rectangle (cogl_get_draw_framebuffer (),
-                                   tracker->pipeline,
-                                   tracker->current_rect.x,
-                                   tracker->current_rect.y,
-                                   tracker->current_rect.x +
-                                   tracker->current_rect.width,
-                                   tracker->current_rect.y +
-                                   tracker->current_rect.height);
-
-  tracker->previous_rect = tracker->current_rect;
-  tracker->previous_is_valid = TRUE;
-}
-
-void
-meta_cursor_tracker_queue_redraw (MetaCursorTracker *tracker,
-                                  ClutterActor      *stage)
+static void
+meta_cursor_tracker_queue_redraw (MetaCursorTracker *tracker)
 {
+  MetaWaylandCompositor *compositor = meta_wayland_compositor_get_default ();
+  ClutterActor *stage = compositor->stage;
  cairo_rectangle_int_t clip;

  g_assert (meta_is_wayland_compositor ());
@@ -999,7 +959,7 @@ meta_cursor_tracker_queue_redraw (MetaCursorTracker *tracker,
      tracker->previous_is_valid = FALSE;
    }

-  if (tracker->has_hw_cursor || !tracker->has_cursor)
+  if (tracker->has_hw_cursor || !tracker->displayed_cursor)
    return;

  clip.x = tracker->current_rect.x;
@@ -1009,6 +969,72 @@ meta_cursor_tracker_queue_redraw (MetaCursorTracker *tracker,
  clutter_actor_queue_redraw_with_clip (stage, &clip);
 }

+static void
+sync_cursor (MetaCursorTracker *tracker)
+{
+  MetaCursorReference *displayed_cursor;
+
+  sync_displayed_cursor (tracker);
+  displayed_cursor = tracker->displayed_cursor;
+
+  if (displayed_cursor)
+    {
+      tracker->current_rect.x = tracker->current_x - displayed_cursor->hot_x;
+      tracker->current_rect.y = tracker->current_y - displayed_cursor->hot_y;
+      tracker->current_rect.width = cogl_texture_get_width (COGL_TEXTURE (displayed_cursor->texture));
+      tracker->current_rect.height = cogl_texture_get_height (COGL_TEXTURE (displayed_cursor->texture));
+    }
+  else
+    {
+      tracker->current_rect.x = 0;
+      tracker->current_rect.y = 0;
+      tracker->current_rect.width = 0;
+      tracker->current_rect.height = 0;
+    }
+
+  if (meta_is_wayland_compositor ())
+    {
+      if (tracker->has_hw_cursor)
+        move_hw_cursor (tracker);
+      else
+        meta_cursor_tracker_queue_redraw (tracker);
+    }
+}
+
+void
+meta_cursor_tracker_update_position (MetaCursorTracker *tracker,
+                                     int                new_x,
+                                     int                new_y)
+{
+  g_assert (meta_is_wayland_compositor ());
+
+  tracker->current_x = new_x;
+  tracker->current_y = new_y;
+
+  sync_cursor (tracker);
+}
+
+void
+meta_cursor_tracker_paint (MetaCursorTracker *tracker)
+{
+  g_assert (meta_is_wayland_compositor ());
+
+  if (tracker->has_hw_cursor || !tracker->displayed_cursor)
+    return;
+
+  cogl_framebuffer_draw_rectangle (cogl_get_draw_framebuffer (),
+                                   tracker->pipeline,
+                                   tracker->current_rect.x,
+                                   tracker->current_rect.y,
+                                   tracker->current_rect.x +
+                                   tracker->current_rect.width,
+                                   tracker->current_rect.y +
+                                   tracker->current_rect.height);
+
+  tracker->previous_rect = tracker->current_rect;
+  tracker->previous_is_valid = TRUE;
+}
+
 static void
 meta_cursor_tracker_set_crtc_has_hw_cursor (MetaCursorTracker *tracker,
                                            MetaCRTC          *crtc,
@@ -1016,15 +1042,16 @@ meta_cursor_tracker_set_crtc_has_hw_cursor (MetaCursorTracker *tracker,
 {
  if (has)
    {
+      MetaCursorReference *displayed_cursor = tracker->displayed_cursor;
      union gbm_bo_handle handle;
      int width, height;
      int hot_x, hot_y;

-      handle = gbm_bo_get_handle (tracker->sprite->bo);
-      width = gbm_bo_get_width (tracker->sprite->bo);
-      height = gbm_bo_get_height (tracker->sprite->bo);
-      hot_x = tracker->sprite->hot_x;
-      hot_y = tracker->sprite->hot_y;
+      handle = gbm_bo_get_handle (displayed_cursor->bo);
+      width = gbm_bo_get_width (displayed_cursor->bo);
+      height = gbm_bo_get_height (displayed_cursor->bo);
+      hot_x = displayed_cursor->hot_x;
+      hot_y = displayed_cursor->hot_y;

      drmModeSetCursor2 (tracker->drm_fd, crtc->crtc_id, handle.u32,
                         width, height, hot_x, hot_y);
@@ -1100,13 +1127,7 @@ meta_cursor_tracker_set_pointer_visible (MetaCursorTracker *tracker,

  if (meta_is_wayland_compositor ())
    {
-      MetaWaylandCompositor *compositor;
-
-      compositor = meta_wayland_compositor_get_default ();
-
-      tracker->has_cursor = tracker->sprite != NULL && visible;
-      update_hw_cursor (tracker);
-      meta_cursor_tracker_queue_redraw (tracker, compositor->stage);
+      sync_cursor (tracker);
    }
  else
    {
--- a/src/core/meta-idle-monitor-private.h
+++ b/src/core/meta-idle-monitor-private.h
@@ -14,9 +14,7 @@
 * 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.
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
 *
 * Adapted from gnome-session/gnome-session/gs-idle-monitor.c and
 *         from gnome-desktop/libgnome-desktop/gnome-idle-monitor.c
--- a/src/core/meta-idle-monitor.c
+++ b/src/core/meta-idle-monitor.c
@@ -14,9 +14,7 @@
 * 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.
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
 *
 * Adapted from gnome-session/gnome-session/gs-idle-monitor.c and
 *         from gnome-desktop/libgnome-desktop/gnome-idle-monitor.c
@@ -949,6 +947,8 @@ on_bus_acquired (GDBusConnection *connection,
  for (iter = devices; iter; iter = iter->next)
    on_device_added (device_manager, iter->data, manager);

+  g_slist_free (devices);
+
  g_signal_connect_object (device_manager, "device-added",
                           G_CALLBACK (on_device_added), manager, 0);
  g_signal_connect_object (device_manager, "device-removed",
--- a/src/core/meta-xrandr-shared.h
+++ b/src/core/meta-xrandr-shared.h
@@ -13,9 +13,7 @@
 * 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.
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
 */

 /* This file is shared between mutter (src/core/meta-xrandr-shared.h)
--- a/src/core/monitor-config.c
+++ b/src/core/monitor-config.c
@@ -20,9 +20,7 @@
 * 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.
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
 */

 /*
@@ -817,6 +815,22 @@ meta_monitor_config_match_current (MetaMonitorConfig  *self,
  return ok;
 }

+gboolean
+meta_monitor_manager_has_hotplug_mode_update (MetaMonitorManager *manager)
+{
+  MetaOutput *outputs;
+  unsigned n_outputs;
+  unsigned int i;
+
+  outputs = meta_monitor_manager_get_outputs (manager, &n_outputs);
+
+  for (i = 0; i < n_outputs; i++)
+    if (outputs[i].hotplug_mode_update)
+      return TRUE;
+
+  return FALSE;
+}
+
 static MetaConfiguration *
 meta_monitor_config_get_stored (MetaMonitorConfig *self,
 				MetaOutput        *outputs,
--- a/src/core/monitor-private.h
+++ b/src/core/monitor-private.h
@@ -29,9 +29,7 @@
 * 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.
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
 */

 #ifndef META_MONITOR_PRIVATE_H
@@ -119,6 +117,9 @@ struct _MetaOutput

  gpointer driver_private;
  GDestroyNotify driver_notify;
+
+  /* get a new preferred mode on hotplug events, to handle dynamic guest resizing */
+  gboolean hotplug_mode_update;
 };

 struct _MetaCRTC
@@ -407,6 +408,7 @@ void               meta_monitor_manager_free_output_array (MetaOutput *old_outpu
                                                           int         n_old_outputs);
 void               meta_monitor_manager_free_mode_array (MetaMonitorMode *old_modes,
                                                         int              n_old_modes);
+gboolean           meta_monitor_manager_has_hotplug_mode_update (MetaMonitorManager *manager);

 /* Returns true if transform causes width and height to be inverted
   This is true for the odd transforms in the enum */
--- a/src/core/monitor-xrandr.c
+++ b/src/core/monitor-xrandr.c
@@ -20,9 +20,7 @@
 * 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.
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
 */

 #include "config.h"
@@ -311,6 +309,29 @@ read_output_edid (MetaMonitorManagerXrandr *manager_xrandr,
  return NULL;
 }

+static gboolean
+output_get_hotplug_mode_update (MetaMonitorManagerXrandr *manager_xrandr,
+                                XID                       output_id)
+{
+  MetaDisplay *display = meta_get_display ();
+  XRRPropertyInfo *info;
+  gboolean result = FALSE;
+
+  meta_error_trap_push (display);
+  info = XRRQueryOutputProperty (manager_xrandr->xdisplay, output_id,
+                                 display->atom_hotplug_mode_update);
+  meta_error_trap_pop (display);
+
+  if (info)
+    {
+      result = TRUE;
+      XFree (info);
+    }
+
+  return result;
+}
+
+
 static void
 meta_monitor_manager_xrandr_read_current (MetaMonitorManager *manager)
 {
@@ -430,8 +451,10 @@ meta_monitor_manager_xrandr_read_current (MetaMonitorManager *manager)
      XRRFreeCrtcInfo (crtc);
    }

+  meta_error_trap_push (meta_get_display ());
  primary_output = XRRGetOutputPrimary (manager_xrandr->xdisplay,
 					DefaultRootWindow (manager_xrandr->xdisplay));
+  meta_error_trap_pop (meta_get_display ());

  n_actual_outputs = 0;
  for (i = 0; i < (unsigned)resources->noutput; i++)
@@ -484,6 +507,8 @@ meta_monitor_manager_xrandr_read_current (MetaMonitorManager *manager)
 	  meta_output->width_mm = output->mm_width;
 	  meta_output->height_mm = output->mm_height;
 	  meta_output->subpixel_order = COGL_SUBPIXEL_ORDER_UNKNOWN;
+          meta_output->hotplug_mode_update =
+              output_get_hotplug_mode_update (manager_xrandr, meta_output->output_id);

 	  meta_output->n_modes = output->nmode;
 	  meta_output->modes = g_new0 (MetaMonitorMode *, meta_output->n_modes);
@@ -666,10 +691,11 @@ meta_monitor_manager_xrandr_apply_configuration (MetaMonitorManager *manager,
 						 unsigned int         n_outputs)
 {
  MetaMonitorManagerXrandr *manager_xrandr = META_MONITOR_MANAGER_XRANDR (manager);
+  MetaDisplay *display = meta_get_display ();
  unsigned i;
  int width, height, width_mm, height_mm;

-  meta_display_grab (meta_get_display ());
+  meta_display_grab (display);

  /* First compute the new size of the screen (framebuffer) */
  width = 0; height = 0;
@@ -763,10 +789,10 @@ meta_monitor_manager_xrandr_apply_configuration (MetaMonitorManager *manager,
   */
  width_mm = (width / DPI_FALLBACK) * 25.4 + 0.5;
  height_mm = (height / DPI_FALLBACK) * 25.4 + 0.5;
-  meta_error_trap_push (meta_get_display ());
+  meta_error_trap_push (display);
  XRRSetScreenSize (manager_xrandr->xdisplay, DefaultRootWindow (manager_xrandr->xdisplay),
                    width, height, width_mm, height_mm);
-  meta_error_trap_pop (meta_get_display ());
+  meta_error_trap_pop (display);

  for (i = 0; i < n_crtcs; i++)
    {
@@ -823,7 +849,7 @@ meta_monitor_manager_xrandr_apply_configuration (MetaMonitorManager *manager,
              goto next;
            }

-          meta_error_trap_push (meta_get_display ());
+          meta_error_trap_push (display);
          ok = XRRSetCrtcConfig (manager_xrandr->xdisplay,
                                 manager_xrandr->resources,
                                 (XID)crtc->crtc_id,
@@ -832,7 +858,7 @@ meta_monitor_manager_xrandr_apply_configuration (MetaMonitorManager *manager,
                                 (XID)mode->mode_id,
                                 wl_transform_to_xrandr (crtc_info->transform),
                                 outputs, n_outputs);
-          meta_error_trap_pop (meta_get_display ());
+          meta_error_trap_pop (display);

          if (ok != Success)
            {
@@ -873,9 +899,11 @@ meta_monitor_manager_xrandr_apply_configuration (MetaMonitorManager *manager,

      if (output_info->is_primary)
        {
+          meta_error_trap_push (display);
          XRRSetOutputPrimary (manager_xrandr->xdisplay,
                               DefaultRootWindow (manager_xrandr->xdisplay),
                               (XID)output_info->output->output_id);
+          meta_error_trap_pop (display);
        }

      output_set_presentation_xrandr (manager_xrandr,
@@ -901,7 +929,7 @@ meta_monitor_manager_xrandr_apply_configuration (MetaMonitorManager *manager,
      output->is_primary = FALSE;
    }

-  meta_display_ungrab (meta_get_display ());
+  meta_display_ungrab (display);
 }

 static void
@@ -969,6 +997,16 @@ meta_monitor_manager_xrandr_set_crtc_gamma (MetaMonitorManager *manager,
  XRRFreeGamma (gamma);
 }

+static void
+meta_monitor_manager_xrandr_rebuild_derived (MetaMonitorManager *manager)
+{
+  /* This will be a no-op if the change was from our side, as
+     we already called it in the DBus method handler */
+  meta_monitor_config_update_current (manager->config, manager);
+
+  meta_monitor_manager_rebuild_derived (manager);
+}
+
 static gboolean
 meta_monitor_manager_xrandr_handle_xevent (MetaMonitorManager *manager,
 					   XEvent             *event)
@@ -978,6 +1016,7 @@ meta_monitor_manager_xrandr_handle_xevent (MetaMonitorManager *manager,
  MetaCRTC *old_crtcs;
  MetaMonitorMode *old_modes;
  unsigned int n_old_outputs, n_old_modes;
+  gboolean new_config;

  if ((event->type - manager_xrandr->rr_event_base) != RRScreenChangeNotify)
    return FALSE;
@@ -994,31 +1033,36 @@ meta_monitor_manager_xrandr_handle_xevent (MetaMonitorManager *manager,
  manager->serial++;
  meta_monitor_manager_xrandr_read_current (manager);

-  /* Check if the current intended configuration has the same outputs
-     as the new real one, or if the event is a result of an XRandR call.
-     If so, we can go straight to rebuild the logical config and tell
-     the outside world.
-     Otherwise, this event was caused by hotplug, so give a chance to
-     MetaMonitorConfig.
+  new_config = manager_xrandr->resources->timestamp >=
+    manager_xrandr->resources->configTimestamp;
+  if (meta_monitor_manager_has_hotplug_mode_update (manager))

-     Note that we need to check both the timestamps and the list of
-     outputs, because the X server might emit spurious events with
-     new configTimestamps (bug 702804), and the driver may have
-     changed the EDID for some other reason (old broken qxl and vbox
-     drivers...).
-  */
-  if (manager_xrandr->resources->timestamp >= manager_xrandr->resources->configTimestamp ||
-      meta_monitor_config_match_current (manager->config, manager))
    {
-      /* This will be a no-op if the change was from our side, as
-         we already called it in the DBus method handler */
-      meta_monitor_config_update_current (manager->config, manager);
-
-      meta_monitor_manager_rebuild_derived (manager);
+      /* Check if the current intended configuration is a result of an
+         XRandR call.  Otherwise, hotplug_mode_update tells us to get
+         a new preferred mode on hotplug events to handle dynamic
+         guest resizing. */
+      if (new_config)
+        meta_monitor_manager_xrandr_rebuild_derived (manager);
+      else
+        meta_monitor_config_make_default (manager->config, manager);
    }
  else
    {
-      if (!meta_monitor_config_apply_stored (manager->config, manager))
+      /* Check if the current intended configuration has the same outputs
+         as the new real one, or if the event is a result of an XRandR call.
+         If so, we can go straight to rebuild the logical config and tell
+         the outside world.
+         Otherwise, this event was caused by hotplug, so give a chance to
+         MetaMonitorConfig.
+
+         Note that we need to check both the timestamps and the list of
+         outputs, because the X server might emit spurious events with new
+         configTimestamps (bug 702804), and the driver may have changed
+         the EDID for some other reason (old qxl and vbox drivers). */
+      if (new_config || meta_monitor_config_match_current (manager->config, manager))
+        meta_monitor_manager_xrandr_rebuild_derived (manager);
+      else if (!meta_monitor_config_apply_stored (manager->config, manager))
        meta_monitor_config_make_default (manager->config, manager);
    }

--- a/src/core/monitor.c
+++ b/src/core/monitor.c
@@ -20,9 +20,7 @@
 * 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.
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
 */

 #include "config.h"
@@ -614,46 +612,60 @@ static char *
 make_display_name (MetaMonitorManager *manager,
                   MetaOutput         *output)
 {
+  char *inches = NULL;
+  char *vendor_name = NULL;
+  char *ret;
+
  if (g_str_has_prefix (output->name, "LVDS") ||
      g_str_has_prefix (output->name, "eDP"))
-    return g_strdup (_("Built-in display"));
+    {
+      ret = g_strdup (_("Built-in display"));
+      goto out;
+    }

-  if (output->width_mm != -1 && output->height_mm != -1)
+  if (output->width_mm > 0 && output->height_mm > 0)
    {
      double d = sqrt (output->width_mm * output->width_mm +
                       output->height_mm * output->height_mm);
-      char *inches = diagonal_to_str (d / 25.4);
-      char *vendor_name;
-      char *ret;
+      inches = diagonal_to_str (d / 25.4);
+    }

-      if (g_strcmp0 (output->vendor, "unknown") != 0)
-        {
-          if (!manager->pnp_ids)
-            manager->pnp_ids = gnome_pnp_ids_new ();
+  if (g_strcmp0 (output->vendor, "unknown") != 0)
+    {
+      if (!manager->pnp_ids)
+        manager->pnp_ids = gnome_pnp_ids_new ();

-          vendor_name = gnome_pnp_ids_get_pnp_id (manager->pnp_ids,
-                                                  output->vendor);
+      vendor_name = gnome_pnp_ids_get_pnp_id (manager->pnp_ids,
+                                              output->vendor);

-          ret = g_strdup_printf ("%s %s", vendor_name, inches);
-
-          g_free (vendor_name);
-        }
-      else
-        {
-          /* TRANSLATORS: this is a monitor name (in case we don't know
-             the vendor), it's Unknown followed by a size in inches,
-             like 'Unknown 15"'
-          */
-          ret = g_strdup_printf (_("Unknown %s"), inches);
-        }
-
-      g_free (inches);
-      return ret;
+      if (!vendor_name)
+        vendor_name = g_strdup (output->vendor);
    }
  else
    {
-      return g_strdup (output->vendor);
+      if (inches != NULL)
+        vendor_name = g_strdup (_("Unknown"));
+      else
+        vendor_name = g_strdup (_("Unknown Display"));
    }
+
+  if (inches != NULL)
+    {
+      /* TRANSLATORS: this is a monitor vendor name, followed by a
+       * size in inches, like 'Dell 15"'
+       */
+      ret = g_strdup_printf (_("%s %s"), vendor_name, inches);
+    }
+  else
+    {
+      ret = g_strdup (vendor_name);
+    }
+
+ out:
+  g_free (inches);
+  g_free (vendor_name);
+
+  return ret;
 }

 static gboolean
--- a/src/core/mutter.c
+++ b/src/core/mutter.c
@@ -14,9 +14,7 @@
 * 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.
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
 */

 #include "config.h"
--- a/src/core/place.c
+++ b/src/core/place.c
@@ -19,9 +19,7 @@
 * 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.
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
 */

 #include <config.h>
@@ -47,34 +45,18 @@ northwestcmp (gconstpointer a, gconstpointer b)
 {
  MetaWindow *aw = (gpointer) a;
  MetaWindow *bw = (gpointer) b;
+  MetaRectangle a_frame;
+  MetaRectangle b_frame;
  int from_origin_a;
  int from_origin_b;
  int ax, ay, bx, by;

-  /* we're interested in the frame position for cascading,
-   * not meta_window_get_position()
-   */
-  if (aw->frame)
-    {
-      ax = aw->frame->rect.x;
-      ay = aw->frame->rect.y;
-    }
-  else
-    {
-      ax = aw->rect.x;
-      ay = aw->rect.y;
-    }
-
-  if (bw->frame)
-    {
-      bx = bw->frame->rect.x;
-      by = bw->frame->rect.y;
-    }
-  else
-    {
-      bx = bw->rect.x;
-      by = bw->rect.y;
-    }
+  meta_window_get_frame_rect (aw, &a_frame);
+  meta_window_get_frame_rect (bw, &b_frame);
+  ax = a_frame.x;
+  ay = a_frame.y;
+  bx = b_frame.x;
+  by = b_frame.y;
  
  /* probably there's a fast good-enough-guess we could use here. */
  from_origin_a = sqrt (ax * ax + ay * ay);
@@ -90,7 +72,6 @@ northwestcmp (gconstpointer a, gconstpointer b)

 static void
 find_next_cascade (MetaWindow *window,
-                   MetaFrameBorders *borders,
                   /* visible windows on relevant workspaces */
                   GList      *windows,
                   int         x,
@@ -102,6 +83,7 @@ find_next_cascade (MetaWindow *window,
  GList *sorted;
  int cascade_x, cascade_y;
  int x_threshold, y_threshold;
+  MetaRectangle frame_rect;
  int window_width, window_height;
  int cascade_stage;
  MetaRectangle work_area;
@@ -120,10 +102,13 @@ find_next_cascade (MetaWindow *window,
   * manually cascade.
   */
 #define CASCADE_FUZZ 15
-  if (borders)
+  if (window->frame)
    {
-      x_threshold = MAX (borders->visible.left, CASCADE_FUZZ);
-      y_threshold = MAX (borders->visible.top, CASCADE_FUZZ);
+      MetaFrameBorders borders;
+
+      meta_frame_calc_borders (window->frame, &borders);
+      x_threshold = MAX (borders.visible.left, CASCADE_FUZZ);
+      y_threshold = MAX (borders.visible.top, CASCADE_FUZZ);
    }
  else
    {
@@ -143,30 +128,25 @@ find_next_cascade (MetaWindow *window,
  cascade_y = MAX (0, work_area.y);
  
  /* Find first cascade position that's not used. */
-  
-  window_width = window->frame ? window->frame->rect.width : window->rect.width;
-  window_height = window->frame ? window->frame->rect.height : window->rect.height;
+
+  meta_window_get_frame_rect (window, &frame_rect);
+  window_width = frame_rect.width;
+  window_height = frame_rect.height;
  
  cascade_stage = 0;
  tmp = sorted;
  while (tmp != NULL)
    {
      MetaWindow *w;
+      MetaRectangle w_frame_rect;
      int wx, wy;
      
      w = tmp->data;

      /* we want frame position, not window position */
-      if (w->frame)
-        {
-          wx = w->frame->rect.x;
-          wy = w->frame->rect.y;
-        }
-      else
-        {
-          wx = w->rect.x;
-          wy = w->rect.y;
-        }
+      meta_window_get_frame_rect (w, &w_frame_rect);
+      wx = w_frame_rect.x;
+      wy = w_frame_rect.y;
      
      if (ABS (wx - cascade_x) < x_threshold &&
          ABS (wy - cascade_y) < y_threshold)
@@ -223,22 +203,12 @@ find_next_cascade (MetaWindow *window,
  
  g_list_free (sorted);

-  /* Convert coords to position of window, not position of frame. */
-  if (borders == NULL)
-    {
-      *new_x = cascade_x;
-      *new_y = cascade_y;
-    }
-  else
-    {
-      *new_x = cascade_x + borders->visible.left;
-      *new_y = cascade_y + borders->visible.top;
-    }
+  *new_x = cascade_x;
+  *new_y = cascade_y;
 }

 static void
 find_most_freespace (MetaWindow *window,
-                     MetaFrameBorders *borders,
                     /* visible windows on relevant workspaces */
                     MetaWindow *focus_window,
                     int         x,
@@ -250,29 +220,25 @@ find_most_freespace (MetaWindow *window,
  int max_area;
  int max_width, max_height, left, right, top, bottom;
  int left_space, right_space, top_space, bottom_space;
-  int frame_size_left, frame_size_top;
  MetaRectangle work_area;
  MetaRectangle avoid;
-  MetaRectangle outer;
-
-  frame_size_left = borders ? borders->visible.left : 0;
-  frame_size_top  = borders ? borders->visible.top : 0;
+  MetaRectangle frame_rect;

  meta_window_get_work_area_current_monitor (focus_window, &work_area);
-  meta_window_get_outer_rect (focus_window, &avoid);
-  meta_window_get_outer_rect (window, &outer);
+  meta_window_get_frame_rect (focus_window, &avoid);
+  meta_window_get_frame_rect (window, &frame_rect);

  /* Find the areas of choosing the various sides of the focus window */
-  max_width  = MIN (avoid.width, outer.width);
-  max_height = MIN (avoid.height, outer.height);
+  max_width  = MIN (avoid.width, frame_rect.width);
+  max_height = MIN (avoid.height, frame_rect.height);
  left_space   = avoid.x - work_area.x;
  right_space  = work_area.width - (avoid.x + avoid.width - work_area.x);
  top_space    = avoid.y - work_area.y;
  bottom_space = work_area.height - (avoid.y + avoid.height - work_area.y);
-  left   = MIN (left_space,   outer.width);
-  right  = MIN (right_space,  outer.width);
-  top    = MIN (top_space,    outer.height);
-  bottom = MIN (bottom_space, outer.height);
+  left   = MIN (left_space,   frame_rect.width);
+  right  = MIN (right_space,  frame_rect.width);
+  top    = MIN (top_space,    frame_rect.height);
+  bottom = MIN (bottom_space, frame_rect.height);

  /* Find out which side of the focus_window can show the most of the window */
  side = META_LEFT;
@@ -304,39 +270,56 @@ find_most_freespace (MetaWindow *window,
  switch (side)
    {
    case META_LEFT:
-      *new_y = avoid.y + frame_size_top;
-      if (left_space > outer.width)
-        *new_x = avoid.x - outer.width + frame_size_left;
+      *new_y = avoid.y;
+      if (left_space > frame_rect.width)
+        *new_x = avoid.x - frame_rect.width;
      else
-        *new_x = work_area.x + frame_size_left;
+        *new_x = work_area.x;
      break;
    case META_RIGHT:
-      *new_y = avoid.y + frame_size_top;
-      if (right_space > outer.width)
-        *new_x = avoid.x + avoid.width + frame_size_left;
+      *new_y = avoid.y;
+      if (right_space > frame_rect.width)
+        *new_x = avoid.x + avoid.width;
      else
-        *new_x = work_area.x + work_area.width - outer.width + frame_size_left;
+        *new_x = work_area.x + work_area.width - frame_rect.width;
      break;
    case META_TOP:
-      *new_x = avoid.x + frame_size_left;
-      if (top_space > outer.height)
-        *new_y = avoid.y - outer.height + frame_size_top;
+      *new_x = avoid.x;
+      if (top_space > frame_rect.height)
+        *new_y = avoid.y - frame_rect.height;
      else
-        *new_y = work_area.y + frame_size_top;
+        *new_y = work_area.y;
      break;
    case META_BOTTOM:
-      *new_x = avoid.x + frame_size_left;
-      if (bottom_space > outer.height)
-        *new_y = avoid.y + avoid.height + frame_size_top;
+      *new_x = avoid.x;
+      if (bottom_space > frame_rect.height)
+        *new_y = avoid.y + avoid.height;
      else
-        *new_y = work_area.y + work_area.height - outer.height + frame_size_top;
+        *new_y = work_area.y + work_area.height - frame_rect.height;
      break;
    }
 }

+static gboolean
+window_overlaps_focus_window (MetaWindow *window)
+{
+  MetaWindow *focus_window;
+  MetaRectangle window_frame, focus_frame, overlap;
+
+  focus_window = window->display->focus_window;
+  if (focus_window == NULL)
+    return FALSE;
+
+  meta_window_get_frame_rect (window, &window_frame);
+  meta_window_get_frame_rect (focus_window, &focus_frame);
+
+  return meta_rectangle_intersect (&window_frame,
+                                   &focus_frame,
+                                   &overlap);
+}
+
 static void
 avoid_being_obscured_as_second_modal_dialog (MetaWindow *window,
-                                             MetaFrameBorders *borders,
                                             int        *x,
                                             int        *y)
 {
@@ -355,18 +338,17 @@ avoid_being_obscured_as_second_modal_dialog (MetaWindow *window,
   */

  MetaWindow *focus_window;
-  MetaRectangle overlap;

  focus_window = window->display->focus_window;

+  /* denied_focus_and_not_transient is only set when focus_window != NULL */
+
  if (window->denied_focus_and_not_transient &&
      window->wm_state_modal && /* FIXME: Maybe do this for all transients? */
      meta_window_same_application (window, focus_window) &&
-      meta_rectangle_intersect (&window->rect,
-                                &focus_window->rect,
-                                &overlap))
+      window_overlaps_focus_window (window))
    {
-      find_most_freespace (window, borders, focus_window, *x, *y, x, y);
+      find_most_freespace (window, focus_window, *x, *y, x, y);
      meta_topic (META_DEBUG_PLACEMENT,
                  "Dialog window %s was denied focus but may be modal "
                  "to the focus window; had to move it to avoid the "
@@ -409,7 +391,7 @@ rectangle_overlaps_some_window (MetaRectangle *rect,
        case META_WINDOW_UTILITY:
        case META_WINDOW_TOOLBAR:
        case META_WINDOW_MENU:
-          meta_window_get_outer_rect (other, &other_rect);
+          meta_window_get_frame_rect (other, &other_rect);
          
          if (meta_rectangle_intersect (rect, &other_rect, &dest))
            return TRUE;
@@ -427,20 +409,14 @@ leftmost_cmp (gconstpointer a, gconstpointer b)
 {
  MetaWindow *aw = (gpointer) a;
  MetaWindow *bw = (gpointer) b;
+  MetaRectangle a_frame;
+  MetaRectangle b_frame;
  int ax, bx;

-  /* we're interested in the frame position for cascading,
-   * not meta_window_get_position()
-   */
-  if (aw->frame)
-    ax = aw->frame->rect.x;
-  else
-    ax = aw->rect.x;
-
-  if (bw->frame)
-    bx = bw->frame->rect.x;
-  else
-    bx = bw->rect.x;
+  meta_window_get_frame_rect (aw, &a_frame);
+  meta_window_get_frame_rect (bw, &b_frame);
+  ax = a_frame.x;
+  bx = b_frame.x;

  if (ax < bx)
    return -1;
@@ -455,20 +431,14 @@ topmost_cmp (gconstpointer a, gconstpointer b)
 {
  MetaWindow *aw = (gpointer) a;
  MetaWindow *bw = (gpointer) b;
+  MetaRectangle a_frame;
+  MetaRectangle b_frame;
  int ay, by;

-  /* we're interested in the frame position for cascading,
-   * not meta_window_get_position()
-   */
-  if (aw->frame)
-    ay = aw->frame->rect.y;
-  else
-    ay = aw->rect.y;
-
-  if (bw->frame)
-    by = bw->frame->rect.y;
-  else
-    by = bw->rect.y;
+  meta_window_get_frame_rect (aw, &a_frame);
+  meta_window_get_frame_rect (bw, &b_frame);
+  ay = a_frame.y;
+  by = b_frame.y;

  if (ay < by)
    return -1;
@@ -506,7 +476,6 @@ center_tile_rect_in_area (MetaRectangle *rect,
 */
 static gboolean
 find_first_fit (MetaWindow *window,
-                MetaFrameBorders *borders,
                /* visible windows on relevant workspaces */
                GList      *windows,
 		int         monitor,
@@ -540,15 +509,8 @@ find_first_fit (MetaWindow *window,
  right_sorted = g_list_copy (windows);
  right_sorted = g_list_sort (right_sorted, topmost_cmp);
  right_sorted = g_list_sort (right_sorted, leftmost_cmp);
-  
-  rect.width = window->rect.width;
-  rect.height = window->rect.height;
-  
-  if (borders)
-    {
-      rect.width += borders->visible.left + borders->visible.right;
-      rect.height += borders->visible.top + borders->visible.bottom;
-    }
+
+  meta_window_get_frame_rect (window, &rect);

 #ifdef WITH_VERBOSE_MODE
    {
@@ -570,11 +532,6 @@ find_first_fit (MetaWindow *window,
      {
        *new_x = rect.x;
        *new_y = rect.y;
-        if (borders)
-          {
-            *new_x += borders->visible.left;
-            *new_y += borders->visible.top;
-          }
    
        retval = TRUE;
       
@@ -586,23 +543,18 @@ find_first_fit (MetaWindow *window,
    while (tmp != NULL)
      {
        MetaWindow *w = tmp->data;
-        MetaRectangle outer_rect;
+        MetaRectangle frame_rect;

-        meta_window_get_outer_rect (w, &outer_rect);
+        meta_window_get_frame_rect (w, &frame_rect);
      
-        rect.x = outer_rect.x;
-        rect.y = outer_rect.y + outer_rect.height;
+        rect.x = frame_rect.x;
+        rect.y = frame_rect.y + frame_rect.height;
      
        if (meta_rectangle_contains_rect (&work_area, &rect) &&
            !rectangle_overlaps_some_window (&rect, below_sorted))
          {
            *new_x = rect.x;
            *new_y = rect.y;
-            if (borders)
-              {
-                *new_x += borders->visible.left;
-                *new_y += borders->visible.top;
-              }
          
            retval = TRUE;
          
@@ -617,23 +569,18 @@ find_first_fit (MetaWindow *window,
    while (tmp != NULL)
      {
        MetaWindow *w = tmp->data;
-        MetaRectangle outer_rect;
+        MetaRectangle frame_rect;
   
-        meta_window_get_outer_rect (w, &outer_rect);
+        meta_window_get_frame_rect (w, &frame_rect);
     
-        rect.x = outer_rect.x + outer_rect.width;
-        rect.y = outer_rect.y;
+        rect.x = frame_rect.x + frame_rect.width;
+        rect.y = frame_rect.y;
   
        if (meta_rectangle_contains_rect (&work_area, &rect) &&
            !rectangle_overlaps_some_window (&rect, right_sorted))
          {
            *new_x = rect.x;
            *new_y = rect.y;
-            if (borders)
-              {
-                *new_x += borders->visible.left;
-                *new_y += borders->visible.top;
-              }
        
            retval = TRUE;
       
@@ -652,7 +599,6 @@ find_first_fit (MetaWindow *window,

 void
 meta_window_place (MetaWindow        *window,
-                   MetaFrameBorders  *borders,
                   int                x,
                   int                y,
                   int               *new_x,
@@ -661,13 +607,6 @@ meta_window_place (MetaWindow        *window,
  GList *windows;
  const MetaMonitorInfo *xi;

-  /* frame member variables should NEVER be used in here, only
-   * MetaFrameBorders. But remember borders == NULL
-   * for undecorated windows. Also, this function should
-   * NEVER have side effects other than computing the
-   * placement coordinates.
-   */
-
  meta_topic (META_DEBUG_PLACEMENT, "Placing window %s\n", window->desc);

  windows = NULL;
@@ -756,7 +695,7 @@ meta_window_place (MetaWindow        *window,
        {
          meta_topic (META_DEBUG_PLACEMENT,
                      "Not placing window with PPosition or USPosition set\n");
-          avoid_being_obscured_as_second_modal_dialog (window, borders, &x, &y);
+          avoid_being_obscured_as_second_modal_dialog (window, &x, &y);
          goto done_no_constraints;
        }
    }
@@ -775,29 +714,27 @@ meta_window_place (MetaWindow        *window,

      if (parent)
        {
-          int w;
+          MetaRectangle frame_rect, parent_frame_rect;

-          meta_window_get_position (parent, &x, &y);
-          w = parent->rect.width;
+          meta_window_get_frame_rect (window, &frame_rect);
+          meta_window_get_frame_rect (parent, &parent_frame_rect);
+
+          y = parent_frame_rect.y;

          /* center of parent */
-          x = x + w / 2;
+          x = parent_frame_rect.x + parent_frame_rect.width / 2;
          /* center of child over center of parent */
-          x -= window->rect.width / 2;
+          x -= frame_rect.width / 2;

          /* "visually" center window over parent, leaving twice as
           * much space below as on top.
           */
-          y += (parent->rect.height - window->rect.height)/3;
-
-          /* put top of child's frame, not top of child's client */
-          if (borders)
-            y += borders->visible.top;
+          y += (parent_frame_rect.height - frame_rect.height)/3;

          meta_topic (META_DEBUG_PLACEMENT, "Centered window %s over transient parent\n",
                      window->desc);
          
-          avoid_being_obscured_as_second_modal_dialog (window, borders, &x, &y);
+          avoid_being_obscured_as_second_modal_dialog (window, &x, &y);

          goto done;
        }
@@ -813,6 +750,9 @@ meta_window_place (MetaWindow        *window,
    {
      /* Center on current monitor */
      int w, h;
+      MetaRectangle frame_rect;
+
+      meta_window_get_frame_rect (window, &frame_rect);

      /* Warning, this function is a round trip! */
      xi = meta_screen_get_current_monitor_info (window->screen);
@@ -820,8 +760,8 @@ meta_window_place (MetaWindow        *window,
      w = xi->rect.width;
      h = xi->rect.height;

-      x = (w - window->rect.width) / 2;
-      y = (h - window->rect.height) / 2;
+      x = (w - frame_rect.width) / 2;
+      y = (h - frame_rect.height) / 2;

      x += xi->rect.x;
      y += xi->rect.y;
@@ -865,7 +805,7 @@ meta_window_place (MetaWindow        *window,
  x = xi->rect.x;
  y = xi->rect.y;

-  if (find_first_fit (window, borders, windows,
+  if (find_first_fit (window, windows,
                      xi->number,
                      x, y, &x, &y))
    goto done_check_denied_focus;
@@ -878,17 +818,17 @@ meta_window_place (MetaWindow        *window,
      !window->fullscreen)
    {
      MetaRectangle workarea;
-      MetaRectangle outer;
+      MetaRectangle frame_rect;

      meta_window_get_work_area_for_monitor (window,
                                             xi->number,
                                             &workarea);      
-      meta_window_get_outer_rect (window, &outer);
+      meta_window_get_frame_rect (window, &frame_rect);
      
      /* If the window is bigger than the screen, then automaximize.  Do NOT
       * auto-maximize the directions independently.  See #419810.
       */
-      if (outer.width >= workarea.width && outer.height >= workarea.height)
+      if (frame_rect.width >= workarea.width && frame_rect.height >= workarea.height)
        {
          window->maximize_horizontally_after_placement = TRUE;
          window->maximize_vertically_after_placement = TRUE;
@@ -899,7 +839,7 @@ meta_window_place (MetaWindow        *window,
   * fully overlapping window (e.g. starting multiple terminals)
   * */
  if (x == xi->rect.x && y == xi->rect.y)  
-    find_next_cascade (window, borders, windows, x, y, &x, &y);
+    find_next_cascade (window, windows, x, y, &x, &y);

 done_check_denied_focus:
  /* If the window is being denied focus and isn't a transient of the
@@ -909,17 +849,14 @@ meta_window_place (MetaWindow        *window,
   */
  if (window->denied_focus_and_not_transient)
    {
-      gboolean       found_fit;
      MetaWindow    *focus_window;
-      MetaRectangle  overlap;
+      gboolean       found_fit;

      focus_window = window->display->focus_window;
      g_assert (focus_window != NULL);

      /* No need to do anything if the window doesn't overlap at all */
-      found_fit = !meta_rectangle_intersect (&window->rect,
-                                             &focus_window->rect,
-                                             &overlap);
+      found_fit = !window_overlaps_focus_window (window);

      /* Try to do a first fit again, this time only taking into account the
       * focus window.
@@ -933,7 +870,7 @@ meta_window_place (MetaWindow        *window,
          x = xi->rect.x;
          y = xi->rect.y;

-          found_fit = find_first_fit (window, borders, focus_window_list,
+          found_fit = find_first_fit (window, focus_window_list,
                                      xi->number,
                                      x, y, &x, &y);
          g_list_free (focus_window_list);
@@ -943,7 +880,7 @@ meta_window_place (MetaWindow        *window,
       * as possible.
       */
      if (!found_fit)
-        find_most_freespace (window, borders, focus_window, x, y, &x, &y);
+        find_most_freespace (window, focus_window, x, y, &x, &y);
    }
  
 done:
--- a/src/core/place.h
+++ b/src/core/place.h
@@ -16,9 +16,7 @@
 * 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.
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
 */

 #ifndef META_PLACE_H
@@ -28,7 +26,6 @@
 #include "frame.h"

 void meta_window_place (MetaWindow *window,
-                        MetaFrameBorders *borders,
                        int         x,
                        int         y,
                        int        *new_x,
--- a/src/core/prefs.c
+++ b/src/core/prefs.c
@@ -17,9 +17,7 @@
 * 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.
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
 */

 /**
--- a/src/core/screen-private.h
+++ b/src/core/screen-private.h
@@ -25,9 +25,7 @@
 * 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.
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
 */

 #ifndef META_SCREEN_PRIVATE_H
--- a/src/core/screen.c
+++ b/src/core/screen.c
@@ -19,9 +19,7 @@
 * 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.
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
 */

 /**
@@ -859,9 +857,9 @@ meta_screen_free (MetaScreen *screen,
                  screen->wm_sn_selection_window);
  
  if (screen->work_area_later != 0)
-    g_source_remove (screen->work_area_later);
+    meta_later_remove (screen->work_area_later);
  if (screen->check_fullscreen_later != 0)
-    g_source_remove (screen->check_fullscreen_later);
+    meta_later_remove (screen->check_fullscreen_later);

  if (screen->monitor_infos)
    g_free (screen->monitor_infos);
@@ -880,83 +878,31 @@ meta_screen_free (MetaScreen *screen,
  meta_display_ungrab (display);
 }

-typedef struct
-{
-  Window		xwindow;
-  XWindowAttributes	attrs;
-} WindowInfo;
-
-static GList *
-list_windows (MetaScreen *screen)
-{
-  Window ignored1, ignored2;
-  Window *children;
-  guint n_children, i;
-  GList *result;
-
-  XQueryTree (screen->display->xdisplay,
-              screen->xroot,
-              &ignored1, &ignored2, &children, &n_children);
-
-  result = NULL;
-  for (i = 0; i < n_children; ++i)
-    {
-      WindowInfo *info = g_new0 (WindowInfo, 1);
-
-      meta_error_trap_push_with_return (screen->display);
-      
-      XGetWindowAttributes (screen->display->xdisplay,
-                            children[i], &info->attrs);
-
-      if (meta_error_trap_pop_with_return (screen->display))
-	{
-          meta_verbose ("Failed to get attributes for window 0x%lx\n",
-                        children[i]);
-	  g_free (info);
-        }
-      else
-        {
-	  info->xwindow = children[i];
-	}
-
-      result = g_list_prepend (result, info);
-    }
-
-  if (children)
-    XFree (children);
-
-  return g_list_reverse (result);
-}
-
 void
 meta_screen_manage_all_windows (MetaScreen *screen)
 {
-  GList *windows;
-  GList *list;
-
-  meta_display_grab (screen->display);
+  MetaStackWindow *_children;
+  MetaStackWindow *children;
+  int n_children, i;

  if (screen->guard_window == None)
    screen->guard_window =
      meta_screen_create_guard_window (screen->display->xdisplay, screen);

-  windows = list_windows (screen);
-
  meta_stack_freeze (screen->stack);
-  for (list = windows; list != NULL; list = list->next)
+  meta_stack_tracker_get_stack (screen->stack_tracker, &_children, &n_children);
+
+  /* Copy the stack as it will be modified as part of the loop */
+  children = g_memdup (_children, sizeof (MetaStackWindow) * n_children);
+
+  for (i = 0; i < n_children; ++i)
    {
-      WindowInfo *info = list->data;
-
-      meta_window_new_with_attrs (screen->display, info->xwindow, TRUE,
-                                  META_COMP_EFFECT_NONE,
-                                  &info->attrs);
+      meta_window_new (screen->display, children[i].x11.xwindow, TRUE,
+                       META_COMP_EFFECT_NONE);
    }
+
+  g_free (children);
  meta_stack_thaw (screen->stack);
-
-  g_list_foreach (windows, (GFunc)g_free, NULL);
-  g_list_free (windows);
-
-  meta_display_ungrab (screen->display);
 }

 /**
@@ -1528,7 +1474,7 @@ meta_screen_tab_popup_create (MetaScreen      *screen,
      if (show_type == META_TAB_SHOW_INSTANTLY ||
          !entries[i].hidden                   ||
          !meta_window_get_icon_geometry (window, &r))
-        meta_window_get_outer_rect (window, &r);
+        meta_window_get_frame_rect (window, &r);

      entries[i].rect = r;

@@ -1914,7 +1860,7 @@ meta_screen_get_monitor_for_window (MetaScreen *screen,
 {
  MetaRectangle window_rect;
  
-  meta_window_get_outer_rect (window, &window_rect);
+  meta_window_get_frame_rect (window, &window_rect);

  return meta_screen_get_monitor_for_rect (screen, &window_rect);
 }
--- a/src/core/session.c
+++ b/src/core/session.c
@@ -18,9 +18,7 @@
 * 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.
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
 */

 #include <config.h>
--- a/src/core/session.h
+++ b/src/core/session.h
@@ -23,9 +23,7 @@
 * 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.
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
 */

 #ifndef META_SESSION_H
--- a/src/core/stack-tracker.c
+++ b/src/core/stack-tracker.c
@@ -29,9 +29,7 @@
 * 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.
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
 */

 #include <config.h>
--- a/src/core/stack-tracker.h
+++ b/src/core/stack-tracker.h
@@ -28,9 +28,7 @@
 * 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.
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
 */

 #ifndef META_STACK_TRACKER_H
--- a/src/core/stack.c
+++ b/src/core/stack.c
@@ -22,9 +22,7 @@
 * 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.
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
 */

 #include <config.h>
@@ -92,16 +90,6 @@ meta_stack_new (MetaScreen *screen)
 static void
 free_last_all_root_children_stacked_cache (MetaStack *stack)
 {
-  unsigned int i;
-
-  for (i = 0; i < stack->last_all_root_children_stacked->len; i++)
-    {
-      MetaStackWindow *window = &g_array_index (stack->last_all_root_children_stacked, MetaStackWindow, i);
-      if (window->any.type == META_WINDOW_CLIENT_TYPE_WAYLAND)
-        g_object_remove_weak_pointer (G_OBJECT (window->wayland.meta_window),
-                                      (gpointer *)&window->wayland.meta_window);
-    }
-
  g_array_free (stack->last_all_root_children_stacked, TRUE);
  stack->last_all_root_children_stacked = NULL;
 }
@@ -1337,17 +1325,6 @@ stack_sync_to_xserver (MetaStack *stack)
      /* build XRestackWindows() array from top to bottom */
      if (w->client_type == META_WINDOW_CLIENT_TYPE_X11)
        g_array_append_val (x11_root_children_stacked, top_level_window);
-      else
-        {
-          MetaStackWindow *new;
-
-          /* So we can determine later if a cached stack window is
-           * stale because the corresponding window has been freed we
-           * associate a weak pointer with the new window. */
-          new = &g_array_index (all_root_children_stacked, MetaStackWindow, all_root_children_stacked->len - 1);
-          g_object_add_weak_pointer (G_OBJECT (new->wayland.meta_window),
-                                     (gpointer *)&new->wayland.meta_window);
-        }
    }

  meta_topic (META_DEBUG_STACK, "\n");
@@ -1705,7 +1682,7 @@ window_contains_point (MetaWindow *window,
 {
  MetaRectangle rect;

-  meta_window_get_outer_rect (window, &rect);
+  meta_window_get_frame_rect (window, &rect);

  return POINT_IN_RECT (root_x, root_y, rect);
 }
--- a/src/core/stack.h
+++ b/src/core/stack.h
@@ -15,9 +15,7 @@
 * 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.
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
 */

 #ifndef META_STACK_H
--- a/src/core/testboxes.c
+++ b/src/core/testboxes.c
@@ -16,9 +16,7 @@
 * 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.
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
 */

 #include "boxes-private.h"
--- a/src/core/util.c
+++ b/src/core/util.c
@@ -15,9 +15,7 @@
 * 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.
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
 */

 /**
--- a/src/core/window-private.h
+++ b/src/core/window-private.h
@@ -26,9 +26,7 @@
 * 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.
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
 */

 #ifndef META_WINDOW_PRIVATE_H
@@ -44,6 +42,7 @@
 #include <X11/Xutil.h>
 #include <cairo.h>
 #include <gdk-pixbuf/gdk-pixbuf.h>
+#include <clutter/clutter.h>
 #include "meta-wayland-types.h"

 typedef struct _MetaWindowQueue MetaWindowQueue;
@@ -101,7 +100,7 @@ struct _MetaWindow
  
  MetaWindowType type;
  Atom type_atom;
-  
+
  /* NOTE these five are not in UTF-8, we just treat them as random
   * binary data
   */
@@ -350,6 +349,10 @@ struct _MetaWindow
  /* whether or not the window is from a program running on another machine */
  guint is_remote : 1;

+  /* Used for Wayland -- surfaces can behave as if they were unmapped if
+   * they have a NULL buffer attached... */
+  guint surface_mapped;
+
  /* if non-NULL, the bounds of the window frame */
  cairo_region_t *frame_bounds;

@@ -362,6 +365,9 @@ struct _MetaWindow
  /* the input shape region for picking */
  cairo_region_t *input_region;

+  /* _NET_WM_WINDOW_OPACITY */
+  guint opacity;
+
  /* if TRUE, the we have the new form of sync request counter which
   * also handles application frames */
  guint extended_sync_request_counter : 1;
@@ -461,6 +467,8 @@ struct _MetaWindow

  /* Bypass compositor hints */
  guint bypass_compositor;
+
+  GSList *pending_pings;
 };

 struct _MetaWindowClass
@@ -500,15 +508,9 @@ struct _MetaWindowClass

 MetaWindow* meta_window_new                (MetaDisplay *display,
                                            Window       xwindow,
-                                            gboolean     must_be_viewable);
-MetaWindow* meta_window_new_with_attrs     (MetaDisplay       *display,
-                                            Window             xwindow,
-                                            gboolean           must_be_viewable,
-                                            MetaCompEffect     effect,
-                                            XWindowAttributes *attrs);
+                                            gboolean     must_be_viewable,
+                                            MetaCompEffect     effect);
 MetaWindow *meta_window_new_for_wayland    (MetaDisplay        *display,
-                                            int                 width,
-                                            int                 height,
                                            MetaWaylandSurface *surface);
 void        meta_window_unmanage           (MetaWindow  *window,
                                            guint32      timestamp);
@@ -532,6 +534,7 @@ void        meta_window_update_fullscreen_monitors (MetaWindow    *window,
                                                    unsigned long  left,
                                                    unsigned long  right);

+
 /* args to move are window pos, not frame pos */
 void        meta_window_move               (MetaWindow  *window,
                                            gboolean     user_op,
@@ -642,8 +645,10 @@ void meta_window_update_sync_request_counter (MetaWindow *window,
                                              gint64      new_counter_value);
 #endif /* HAVE_XSYNC */

-void meta_window_handle_mouse_grab_op_event (MetaWindow *window,
-                                             XIDeviceEvent *xev);
+void meta_window_handle_mouse_grab_op_event  (MetaWindow         *window,
+                                              const ClutterEvent *event);
+void meta_window_handle_mouse_grab_op_xevent (MetaWindow         *window,
+                                              XIDeviceEvent      *xevent);

 GList* meta_window_get_workspaces (MetaWindow *window);

@@ -682,6 +687,8 @@ void meta_window_recalc_features    (MetaWindow *window);
 void meta_window_recalc_window_type (MetaWindow *window);
 void meta_window_type_changed       (MetaWindow *window);

+void meta_window_frame_size_changed (MetaWindow *window);
+
 void meta_window_stack_just_below (MetaWindow *window,
                                   MetaWindow *below_this_one);

@@ -705,16 +712,8 @@ void meta_window_compute_tile_match (MetaWindow *window);

 gboolean meta_window_updates_are_frozen (MetaWindow *window);

-void meta_window_set_opaque_region        (MetaWindow     *window,
-                                           cairo_region_t *region);
 void meta_window_update_opaque_region_x11 (MetaWindow *window);
-
-void meta_window_set_input_region         (MetaWindow     *window,
-                                           cairo_region_t *region);
 void meta_window_update_input_region_x11  (MetaWindow *window);
-
-void meta_window_set_shape_region         (MetaWindow     *window,
-                                           cairo_region_t *region);
 void meta_window_update_shape_region_x11  (MetaWindow *window);

 void meta_window_set_title                (MetaWindow *window,
@@ -733,4 +732,28 @@ void meta_window_set_gtk_dbus_properties  (MetaWindow *window,
 void meta_window_set_transient_for        (MetaWindow *window,
                                           MetaWindow *parent);

+void meta_window_set_opacity              (MetaWindow *window,
+                                           guint       opacity);
+
+void meta_window_handle_enter (MetaWindow  *window,
+                               guint32      timestamp,
+                               guint        root_x,
+                               guint        root_y);
+
+void meta_window_set_surface_mapped (MetaWindow *window,
+                                     gboolean    surface_mapped);
+
+typedef void (* MetaWindowPingFunc) (MetaWindow  *window,
+				     guint32      timestamp,
+				     gpointer     user_data);
+
+void meta_window_ping (MetaWindow         *window,
+                       guint32             timestamp,
+                       MetaWindowPingFunc  ping_reply_func,
+                       MetaWindowPingFunc  ping_timeout_func,
+                       void               *user_data);
+void meta_window_pong (MetaWindow *window,
+                       guint32     timestamp);
+Window meta_window_get_toplevel_xwindow (MetaWindow *window);
+
 #endif
--- a/src/core/window-props.c
+++ b/src/core/window-props.c
@@ -31,9 +31,7 @@
 * 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.
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
 */

 #define _GNU_SOURCE
@@ -317,6 +315,9 @@ reload_gtk_frame_extents (MetaWindow    *window,
    {
      window->has_custom_frame_extents = FALSE;
    }
+
+  if (!initial)
+    meta_window_queue(window, META_QUEUE_MOVE_RESIZE);
 }

 static void
@@ -1652,6 +1653,20 @@ reload_bypass_compositor (MetaWindow    *window,
  window->bypass_compositor = requested_value;
 }

+static void
+reload_window_opacity (MetaWindow    *window,
+                       MetaPropValue *value,
+                       gboolean       initial)
+
+{
+  int requested_value = 0xFF;
+
+  if (value->type != META_PROP_VALUE_INVALID)
+    requested_value = (int) value->v.cardinal;
+
+  meta_window_set_opacity (window, requested_value);
+}
+
 #define RELOAD_STRING(var_name, propname) \
  static void                                       \
  reload_ ## var_name (MetaWindow    *window,       \
@@ -1754,6 +1769,7 @@ meta_display_init_window_prop_hooks (MetaDisplay *display)
    { display->atom__NET_WM_STRUT,         META_PROP_VALUE_INVALID, reload_struts,            FALSE, FALSE },
    { display->atom__NET_WM_STRUT_PARTIAL, META_PROP_VALUE_INVALID, reload_struts,            FALSE, FALSE },
    { display->atom__NET_WM_BYPASS_COMPOSITOR, META_PROP_VALUE_CARDINAL,  reload_bypass_compositor, FALSE, FALSE },
+    { display->atom__NET_WM_WINDOW_OPACITY, META_PROP_VALUE_CARDINAL, reload_window_opacity,  TRUE, TRUE },
    { 0 },
  };

--- a/src/core/window-props.h
+++ b/src/core/window-props.h
@@ -25,9 +25,7 @@
 * 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.
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
 */

 #ifndef META_WINDOW_PROPS_H
--- a/src/core/window.c
+++ b/src/core/window.c
--- a/Show More
+++ b/Show More