Bump version to 2.91.92

As the position of attached modal dialogs is determined entirely
by the position of the parent window, the dialog may end up
partially off-screen (especially if the dialog is wider than the
parent). In this case, diverge from the calculated position and
try to fit the dialog on-screen.

https://bugzilla.gnome.org/show_bug.cgi?id=631308

.gitignore

@@ -13,17 +13,22 @@ config.sub
 configure
 depcomp
 install-sh
+intltool-extract.in
+intltool-merge.in
 libtool
 ltmain.sh
 missing
 .deps
-src/metacity-wm.desktop
+src/mutter-wm.desktop
+src/mutter.desktop
 *.o
 *.a
 *.lo
 *.la
 .libs
 *.swp
+*.gir
+*.typelib
 tidy-enum-types.[ch]
 tidy-marshal.[ch]
 stamp-tidy-enum-types.h
@@ -38,19 +43,18 @@ POTFILES
 50-metacity-desktop-key.xml
 50-metacity-key.xml
 inlinepixbufs.h
-libmetacity-private.pc
-metacity
-metacity-dialog
-metacity-theme-viewer
-metacity.desktop
-metacity.schemas
+libmutter.pc
+mutter
+mutter-theme-viewer
+mutter.desktop
+mutter.schemas
 testasyncgetprop
 testboxes
 testgradient
-metacity-grayscale
-metacity-mag
-metacity-message
-metacity-window-demo
+mutter-grayscale
+mutter-mag
+mutter-message
+mutter-window-demo
 focus-window
 test-gravity
 test-resizing
@@ -58,3 +62,8 @@ test-size-hints
 wm-tester
 INSTALL
 mkinstalldirs
+src/mutter-enum-types.[ch]
+src/stamp-mutter-enum-types.h
+src/mutter-marshal.[ch]
+src/stamp-mutter-marshal.h
+src/mutter-plugins.pc

README

@@ -20,7 +20,7 @@ libstartup-notification at
 http://www.freedesktop.org/software/startup-notification/ or on the
 GNOME ftp site. You also need GConf 1.2 (unless building a funky
 extra-small embedded metacity with --disable-gconf, see below).
-You need Clutter 0.9.3. You need gobject-introspection 0.6.3.
+You need Clutter 1.0. You need gobject-introspection 0.6.3.
 
 REPORTING BUGS AND SUBMITTING PATCHES
 ===

configure.in

@@ -1,15 +1,13 @@
 AC_PREREQ(2.50)
 
 m4_define([mutter_major_version], [2])
-m4_define([mutter_minor_version], [27])
-# Fibonacci sequence for micro version numbering:
-# 0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144, 233, 377, 610, 987
-m4_define([mutter_micro_version], [0])
+m4_define([mutter_minor_version], [91])
+m4_define([mutter_micro_version], [92])
 
 m4_define([mutter_version],
           [mutter_major_version.mutter_minor_version.mutter_micro_version])
 
-m4_define([mutter_plugin_api_version], [2])
+m4_define([mutter_plugin_api_version], [3])
 
 AC_INIT([mutter], [mutter_version],
         [http://bugzilla.gnome.org/enter_bug.cgi?product=mutter])
@@ -17,7 +15,8 @@ AC_INIT([mutter], [mutter_version],
 AC_CONFIG_SRCDIR(src/core/display.c)
 AC_CONFIG_HEADERS(config.h)
 
-AM_INIT_AUTOMAKE
+AM_INIT_AUTOMAKE([dist-bzip2 no-dist-gzip])
+m4_ifdef([AM_SILENT_RULES],[AM_SILENT_RULES([yes])],)
 AM_MAINTAINER_MODE
 
 MUTTER_MAJOR_VERSION=mutter_major_version
@@ -46,6 +45,9 @@ AC_HEADER_STDC
 AC_LIBTOOL_WIN32_DLL
 AM_PROG_LIBTOOL
 
+# Sets GLIB_GENMARSHAL and GLIB_MKENUMS
+AM_PATH_GLIB_2_0()
+
 #### Integer sizes
 
 AC_CHECK_SIZEOF(char)
@@ -59,70 +61,11 @@ AC_CHECK_SIZEOF(__int64)
 ## byte order
 AC_C_BIGENDIAN
 
-#### Warnings
+GTK_MIN_VERSION=2.91.7
+CANBERRA_GTK=libcanberra-gtk3
+CANBERRA_GTK_VERSION=0.26
 
-changequote(,)dnl
-if test "x$GCC" = "xyes"; then
-  case " $CFLAGS " in
-  *[\ \	]-Wall[\ \	]*) ;;
-  *) CFLAGS="$CFLAGS -Wall" ;;
-  esac
-
-#  case " $CFLAGS " in
-#  *[\ \	]-Wshadow[\ \	]*) ;;
-#  *) CFLAGS="$CFLAGS -Wshadow" ;;
-#  esac
-
-  case " $CFLAGS " in
-  *[\ \	]-Wchar-subscripts[\ \	]*) ;;
-  *) CFLAGS="$CFLAGS -Wchar-subscripts" ;;
-  esac
-
-  case " $CFLAGS " in
-  *[\ \	]-Wmissing-declarations[\ \	]*) ;;
-  *) CFLAGS="$CFLAGS -Wmissing-declarations" ;;
-  esac
-
-  case " $CFLAGS " in
-  *[\ \	]-Wmissing-prototypes[\ \	]*) ;;
-  *) CFLAGS="$CFLAGS -Wmissing-prototypes" ;;
-  esac
-
-  case " $CFLAGS " in
-  *[\ \	]-Wnested-externs[\ \	]*) ;;
-  *) CFLAGS="$CFLAGS -Wnested-externs" ;;
-  esac
-
-  case " $CFLAGS " in
-  *[\ \	]-Wpointer-arith[\ \	]*) ;;
-  *) CFLAGS="$CFLAGS -Wpointer-arith" ;;
-  esac
-
-  case " $CFLAGS " in
-  *[\ \	]-Wcast-align[\ \	]*) ;;
-  *) CFLAGS="$CFLAGS -Wcast-align" ;;
-  esac
-
-  case " $CFLAGS " in
-  *[\ \	]-Wsign-compare[\ \	]*) ;;
-  *) CFLAGS="$CFLAGS -Wsign-compare" ;;
-  esac
-
-  if test "x$enable_ansi" = "xyes"; then
-    case " $CFLAGS " in
-    *[\ \	]-ansi[\ \	]*) ;;
-    *) CFLAGS="$CFLAGS -ansi" ;;
-    esac
-
-    case " $CFLAGS " in
-    *[\ \	]-pedantic[\ \	]*) ;;
-    *) CFLAGS="$CFLAGS -pedantic" ;;
-    esac
-  fi
-fi
-changequote([,])dnl
-
-MUTTER_PC_MODULES='gtk+-2.0 >= 2.10.0 pango >= 1.2.0'
+MUTTER_PC_MODULES="gtk+-3.0 >= $GTK_MIN_VERSION pango >= 1.2.0 cairo >= 1.10.0"
 
 AC_ARG_ENABLE(gconf,
   AC_HELP_STRING([--disable-gconf],
@@ -153,31 +96,16 @@ AC_ARG_ENABLE(startup-notification,
                  [disable mutter's startup notification support, for embedded/size-sensitive custom non-GNOME builds]),,
   enable_startup_notification=auto)
 
-AC_ARG_ENABLE(compositor,
-  AC_HELP_STRING([--disable-compositor],
-                 [disable mutter's compositing manager]),,
-  enable_compositor=auto)
-
-AC_ARG_ENABLE(clutter,
-  AC_HELP_STRING([--without-clutter],
-                 [disable the use of clutter for compositing]),,
-  with_clutter=auto)
-
-AC_ARG_ENABLE(introspection,
-  AC_HELP_STRING([--without-introspection],
-                 [disable the use of GObject introspection]),,
-  with_introspection=auto)
+AC_ARG_WITH(libcanberra,
+  AC_HELP_STRING([--without-libcanberra],
+                 [disable the use of libcanberra for playing sounds]),,
+  with_libcanberra=auto)
 
 AC_ARG_ENABLE(xsync,
   AC_HELP_STRING([--disable-xsync],
                  [disable mutter's use of the XSync extension]),,
   enable_xsync=auto)
 
-AC_ARG_ENABLE(render,
-  AC_HELP_STRING([--disable-render],
-                 [disable mutter's use of the RENDER extension]),,
-  enable_render=auto)
-
 AC_ARG_ENABLE(shape,
   AC_HELP_STRING([--disable-shape],
                  [disable mutter's use of the shaped window extension]),,
@@ -189,17 +117,11 @@ AC_CHECK_HEADERS(execinfo.h, [AC_CHECK_FUNCS(backtrace)])
 AM_GLIB_GNU_GETTEXT
 
 ## here we get the flags we'll actually use
-# GOptionEntry requires	glib-2.6.0
-PKG_CHECK_MODULES(ALL, glib-2.0 >= 2.6.0)
-# gtk_window_set_icon_name requires gtk2+-2.60
-PKG_CHECK_MODULES(MUTTER_MESSAGE, gtk+-2.0 >= 2.6.0)
-PKG_CHECK_MODULES(MUTTER_WINDOW_DEMO, gtk+-2.0 >= 2.6.0)
-
-if $PKG_CONFIG --atleast-version 1.2.0 pangoxft; then
-   echo "pangoxft found"
-else
-   AC_MSG_ERROR("Pango 1.2.0 or greater based on Xft2 is required")
-fi
+# GRegex requires Glib-2.14.0
+PKG_CHECK_MODULES(ALL, glib-2.0 >= 2.14.0)
+# gtk_window_set_icon_name requires gtk2+-2.6.0
+PKG_CHECK_MODULES(MUTTER_MESSAGE, gtk+-3.0 >= $GTK_MIN_VERSION)
+PKG_CHECK_MODULES(MUTTER_WINDOW_DEMO, gtk+-3.0 >= $GTK_MIN_VERSION)
 
 # Unconditionally use this dir to avoid a circular dep with gnomecc
 GNOME_KEYBINDINGS_KEYSDIR="${datadir}/gnome-control-center/keybindings"
@@ -231,43 +153,28 @@ else
   echo "Building without libstartup-notification"
 fi
 
-## init this, it gets set either in the compositor check below
-## or the render-specific check later
-have_xrender=no
+have_libcanberra=no
+AC_MSG_CHECKING([libcanberra-gtk])
+if test x$with_libcanberra = xno ; then
+  AC_MSG_RESULT([disabled])
+else
+  if $PKG_CONFIG --exists $CANBERRA_GTK '>=' $CANBERRA_GTK_VERSION; then
+    have_libcanberra=yes
+    AC_MSG_RESULT(yes)
+    MUTTER_PC_MODULES="$MUTTER_PC_MODULES $CANBERRA_GTK"
+    AC_DEFINE([HAVE_LIBCANBERRA], 1, [Building with libcanberra for playing sounds])
+  else
+    AC_MSG_RESULT(no)
+    if test x$with_libcanberra = xyes ; then
+      AC_MSG_ERROR([libcanberra forced and libcanberra-gtk was not found])
+    fi
+  fi
+fi
 
 XCOMPOSITE_VERSION=0.2
-if test x$enable_compositor = xyes; then
-   have_xcomposite=yes
-elif test x$enable_compositor = xauto; then
-   echo "Building compositing manager by default now."
-   have_xcomposite=yes
-else
-   have_xcomposite=no
-fi
 
-if test x$with_clutter = xyes; then
-   have_xcomposite=yes
-   have_clutter=yes
-elif test x$with_clutter = xauto; then
-   echo "Building clutter compositing manager by default now."
-   have_xcomposite=yes
-   have_clutter=yes
-else
-   have_clutter=no
-fi
-
-AM_CONDITIONAL(WITH_CLUTTER, test "$have_clutter" = "yes")
-
-if test x$have_xcomposite = xyes; then
-   AC_MSG_CHECKING([Xcomposite >= $XCOMPOSITE_VERSION])
-   if $PKG_CONFIG --atleast-version $XCOMPOSITE_VERSION xcomposite; then
-      AC_MSG_RESULT([yes])
-   else
-      AC_MSG_ERROR([no. Use --disable-compositor to disable.])
-   fi
-fi
-
-if test x$have_xcomposite = xyes; then
+AC_MSG_CHECKING([Xcomposite >= $XCOMPOSITE_VERSION])
+if $PKG_CONFIG --atleast-version $XCOMPOSITE_VERSION xcomposite; then
   MUTTER_PC_MODULES="$MUTTER_PC_MODULES xcomposite >= $XCOMPOSITE_VERSION xfixes xrender xdamage"
   AC_DEFINE(HAVE_COMPOSITE_EXTENSIONS, 1, [Building with compositing manager support])
   echo "Building with compositing manager"
@@ -275,42 +182,13 @@ if test x$have_xcomposite = xyes; then
   ## force on render also
   have_xrender=yes
 else
-  echo "Building without compositing manager"
+  AC_MSG_ERROR([no. Mutter requires the Xcomposite extension to build.])
 fi
 
-## if no compositor, still possibly enable render
-if test x$have_xcomposite = xno; then
-  XRENDER_VERSION=0.0
-  AC_MSG_CHECKING([xrender >= $XRENDER_VERSION])
-  if $PKG_CONFIG --atleast-version $XRENDER_VERSION xrender; then
-     have_xrender=yes
-  else
-     have_xrender=no
-  fi
-  AC_MSG_RESULT($have_xrender)
-
-  if test x$enable_render = xyes; then
-     have_xrender=yes
-     echo "Render support forced on"
-  elif test x$enable_render = xauto; then
-     true
-  else
-     have_xrender=no
-  fi
-
-  if test x$have_xrender = xyes; then
-     echo "Building with Render"
-     MUTTER_PC_MODULES="$MUTTER_PC_MODULES xrender >= $XRENDER_VERSION"
-  fi
-fi ## have_composite
-
-if test x$have_xrender = xyes; then
-  AC_DEFINE(HAVE_RENDER, , [Building with Render extension support])
-fi
-
-CLUTTER_PACKAGE=clutter-0.9
+CLUTTER_VERSION=1.2.0
+CLUTTER_PACKAGE=clutter-1.0
 AC_SUBST(CLUTTER_PACKAGE)
-if test x$have_clutter = xyes; then
+if $PKG_CONFIG --atleast-version $CLUTTER_VERSION $CLUTTER_PACKAGE ; then
   MUTTER_PC_MODULES="$MUTTER_PC_MODULES $CLUTTER_PACKAGE "
   PKG_CHECK_MODULES(CLUTTER, $CLUTTER_PACKAGE)
   AC_DEFINE(WITH_CLUTTER, , [Building with Clutter compositor])
@@ -327,26 +205,19 @@ if test x$have_clutter = xyes; then
     AC_DEFINE(HAVE_GLX_TEXTURE_PIXMAP, ,
               [Is ClutterGLXTexturePixmap available?])
   fi
+else
+  AC_MSG_ERROR([no. Mutter requires Clutter version $CLUTTER_VERSION.])
 fi
 
-if test x$with_introspection != xno; then
-  PKG_CHECK_MODULES(INTROSPECTION, gobject-introspection-1.0, have_introspection=yes, have_introspection=no)
-  if test x$have_introspection=xyes; then
-    MUTTER_PC_MODULES="$MUTTER_PC_MODULES gobject-introspection-1.0"
-    AC_DEFINE(HAVE_INTROSPECTION, 1, [Define if GObject introspection is available])
-    G_IR_SCANNER=`$PKG_CONFIG --variable=g_ir_scanner gobject-introspection-1.0`
-    AC_SUBST(G_IR_SCANNER)
-    G_IR_COMPILER=`$PKG_CONFIG --variable=g_ir_compiler gobject-introspection-1.0`
-    AC_SUBST(G_IR_COMPILER)
-    G_IR_GENERATE=`$PKG_CONFIG --variable=g_ir_generate gobject-introspection-1.0`
-    AC_SUBST(G_IR_GENERATE)
-    GIRDIR=`$PKG_CONFIG --variable=girdir gobject-introspection-1.0`
-    AC_SUBST(GIRDIR)
-    TYPELIBDIR="$($PKG_CONFIG --variable=typelibdir gobject-introspection-1.0)"
-    AC_SUBST(TYPELIBDIR)
-  fi
+INTROSPECTION_VERSION=0.9.5
+GOBJECT_INTROSPECTION_CHECK([$INTROSPECTION_VERSION])
+
+if test x$found_introspection != xno; then
+  AC_DEFINE(HAVE_INTROSPECTION, 1, [Define if GObject introspection is available])
+  MUTTER_PC_MODULES="$MUTTER_PC_MODULES gobject-introspection-1.0"
+  META_GIR=[Meta_]mutter_major_version[_]mutter_minor_version[_gir]
+  AC_SUBST(META_GIR)
 fi
-AM_CONDITIONAL(WITH_INTROSPECTION, test "$have_introspection" = "yes")
 
 AC_MSG_CHECKING([Xcursor])
 if $PKG_CONFIG xcursor; then
@@ -493,7 +364,7 @@ fi
 
 MUTTER_LIBS="$MUTTER_LIBS $XSYNC_LIBS $RANDR_LIBS $SHAPE_LIBS $X_LIBS $X_PRE_LIBS -lX11 $X_EXTRA_LIBS -lm"
 MUTTER_MESSAGE_LIBS="$MUTTER_MESSAGE_LIBS $X_LIBS $X_PRE_LIBS -lX11 $X_EXTRA_LIBS"
-MUTTER_WINDOW_DEMO_LIBS="$MUTTER_WINDOW_DEMO_LIBS $X_LIBS $X_PRE_LIBS -lX11 $X_EXTRA_LIBS"
+MUTTER_WINDOW_DEMO_LIBS="$MUTTER_WINDOW_DEMO_LIBS $X_LIBS $X_PRE_LIBS -lX11 $X_EXTRA_LIBS -lm"
 MUTTER_PROPS_LIBS="$MUTTER_PROPS_LIBS $X_LIBS $X_PRE_LIBS -lX11 $X_EXTRA_LIBS"
 
 found_sm=no
@@ -561,24 +432,88 @@ if test "x$enable_debug" = "xyes"; then
 	CFLAGS="$CFLAGS -g -O"
 fi
 
-# Warnings are there for a reason
-if test "x$GCC" = "xyes"; then
-  CFLAGS="$CFLAGS -Wall -Werror -ansi"
-fi
+# For fix-meta-rectangle.py
+AM_PATH_PYTHON([2.5])
 
 # Use gnome-doc-utils:
 GNOME_DOC_INIT([0.8.0])
 
+#### Warnings (last since -Werror can disturb other tests)
+
+# Stay command-line compatible with the gnome-common configure option. Here
+# minimum/yes/maximum are the same, however.
+AC_ARG_ENABLE(compile_warnings,
+  AS_HELP_STRING([--enable-compile-warnings=@<:@no/minimum/yes/maximum/error@:>@],[Turn on compiler warnings]),,
+  enable_compile_warnings=error)
+
+changequote(,)dnl
+if test "$enable_compile_warnings" != no ; then
+  if test "x$GCC" = "xyes"; then
+    case " $CFLAGS " in
+    *[\ \	]-Wall[\ \	]*) ;;
+    *) CFLAGS="$CFLAGS -Wall" ;;
+    esac
+
+#   case " $CFLAGS " in
+#   *[\ \	]-Wshadow[\ \	]*) ;;
+#   *) CFLAGS="$CFLAGS -Wshadow" ;;
+#   esac
+
+    case " $CFLAGS " in
+    *[\ \	]-Wchar-subscripts[\ \	]*) ;;
+    *) CFLAGS="$CFLAGS -Wchar-subscripts" ;;
+    esac
+
+    case " $CFLAGS " in
+    *[\ \	]-Wmissing-declarations[\ \	]*) ;;
+    *) CFLAGS="$CFLAGS -Wmissing-declarations" ;;
+    esac
+
+    case " $CFLAGS " in
+    *[\ \	]-Wmissing-prototypes[\ \	]*) ;;
+    *) CFLAGS="$CFLAGS -Wmissing-prototypes" ;;
+    esac
+
+    case " $CFLAGS " in
+    *[\ \	]-Wnested-externs[\ \	]*) ;;
+    *) CFLAGS="$CFLAGS -Wnested-externs" ;;
+    esac
+
+    case " $CFLAGS " in
+    *[\ \	]-Wpointer-arith[\ \	]*) ;;
+    *) CFLAGS="$CFLAGS -Wpointer-arith" ;;
+    esac
+
+    case " $CFLAGS " in
+    *[\ \	]-Wcast-align[\ \	]*) ;;
+    *) CFLAGS="$CFLAGS -Wcast-align" ;;
+    esac
+
+    case " $CFLAGS " in
+    *[\ \	]-Wsign-compare[\ \	]*) ;;
+    *) CFLAGS="$CFLAGS -Wsign-compare" ;;
+    esac
+
+    if test "$enable_compile_warnings" = error; then
+      case " $CFLAGS " in
+      *[\ \	]-Werror[\ \	]*) ;;
+      *) CFLAGS="$CFLAGS -Werror" ;;
+      esac
+    fi
+  fi
+fi
+changequote([,])dnl
+
 AC_CONFIG_FILES([
 Makefile
 doc/Makefile
 doc/man/Makefile
 src/Makefile
 src/wm-tester/Makefile
-src/libmutter-private.pc
+src/libmutter.pc
 src/mutter-plugins.pc
 src/tools/Makefile
-src/compositor/mutter/plugins/Makefile
+src/compositor/plugins/Makefile
 po/Makefile.in
 ])
 
@@ -601,7 +536,7 @@ fi
 
 dnl ==========================================================================
 echo "
-mutter-$VERSION:
+mutter-$VERSION
 
 	prefix:                   ${prefix}
 	source code location:	  ${srcdir}
@@ -611,23 +546,21 @@ mutter-$VERSION:
 	XFree86 Xinerama:         ${use_xfree_xinerama}
 	Solaris Xinerama:         ${use_solaris_xinerama}
 	Startup notification:     ${have_startup_notification}
-	Compositing manager:      ${have_xcomposite}
-	Introspection:            ${have_introspection}
+	libcanberra:              ${have_libcanberra}
+	Introspection:            ${found_introspection}
 	Session management:       ${found_sm}
 	Shape extension:          ${found_shape}
-	Resize-and-rotate:        ${found_randr}
 	Xsync:                    ${found_xsync}
-	Render:                   ${have_xrender}
 	Xcursor:                  ${have_xcursor}
-	Clutter:                  ${have_clutter}
 "
 
+
 MUTTER_MINOR_VERSION=mutter_minor_version
-if test $(( $(echo $MUTTER_MINOR_VERSION) %2)) == "1"; then
-   stable_version=$(( ($MUTTER_MINOR_VERSION / 2) * 2))
+if expr $MUTTER_MINOR_VERSION % 2 > /dev/null ; then
+   stable_version=`expr $MUTTER_MINOR_VERSION - 1`
    echo "This is the UNSTABLE branch of mutter"
    echo -n "Use 2.$stable_version.x for stable "
-   echo    "(gnome-2-$stable_version branch in Subversion)"
+   echo    "(gnome-2-$stable_version branch in git)"
 else
    echo "This is the stable branch of mutter"
 fi

doc/theme-format.txt

@@ -4,6 +4,7 @@ of the theme format, and a given theme can support more than one format.
 Version 1:     THEMEDIR/metacity-1/metacity-theme-1.xml
   (original metacity format)
 Version 2:     THEMEDIR/metacity-1/metacity-theme-2.xml
+Version 3:     THEMEDIR/metacity-1/metacity-theme-3.xml
 
 The subdirectory name is "metacity-1" in all versions.
 
@@ -21,6 +22,59 @@ This document has separate sections for each format version. You may
 want to read the document in reverse order, since the base features
 are discussed under version 1.
 
+New Features in Theme Format Version 3.3
+========================================
+
+Add two additional button background functions - left_single_background and
+right_single_background - for button groups with just a single button.
+
+There are now additional frame states to style left/right tiled windows
+differently ("tiled_left", "tiled_right", "tiled_left_and_shaded",
+"tiled_right_and_shaded").
+
+New Features in Theme Format Version 3.2
+========================================
+
+A new window type 'attached' is added for modal dialogs which are
+attached to their parent window. (When the attach_modal_dialogs preference
+is turned on.) If no style is defined for the 'attached' window type,
+the 'border' window type will be used instead.
+
+New Features in Theme Format Version 3.1
+========================================
+
+Additional predefined variables are added for positioning expressions:
+
+ frame_x_center: the X center of the entire frame, with respect to the
+     piece currently being drawn.
+ frame_y_center: the Y center of the entire frame, with respect to the
+     piece currently being drawn.
+
+The <title/> element now supports an "ellipsize_width" attribute. When
+specified, this gives a width at which to ellipsize the title. If not
+specified, the title will simply be clipped to the title area.
+
+New Features in Theme Format Version 3
+======================================
+
+Format version 3 has exactly one new feature; any element in the file
+can now have a version attribute:
+
+  version="[<|<=|=>|>] MAJOR.MINOR"
+
+(< and > should be to be entity escaped as &lt; and &gt;). If this
+version check is not met, then the element and its children will be
+ignored. This allows having alternate sections of the theme file for
+older and newer version of the Metacity theme format.
+
+When placed on the toplevel <metacity_theme> element, an unsatisfied
+version check will not just cause the contents of the file to be
+ignored, it will also cause the lookup of a theme file to proceed on
+and look for an older format 2 or format 1 file. This allows making a
+metacity-theme-3.xml file that is only used the format version 3.2 or
+newer is supported, and using metacity-theme-1.xml for older window
+managers.
+
 New Features in Theme Format Version 2
 ======================================
 

po/LINGUAS

@@ -10,6 +10,7 @@ be@latin
 bg
 bn
 bn_IN
+br
 bs
 ca
 ca@valencia
@@ -56,6 +57,7 @@ mn
 mr
 ms
 nb
+nds
 ne
 nl
 nn
@@ -80,6 +82,7 @@ te
 th
 tk
 tr
+ug 
 uk
 vi
 wa

po/POTFILES.in

@@ -1,11 +1,14 @@
 # List of source files containing translatable strings.
 # Please keep this file sorted alphabetically.
+src/core/all-keybindings.h
+src/core/bell.c
 src/core/core.c
 src/core/delete.c
 src/core/display.c
 src/core/errors.c
 src/core/keybindings.c
 src/core/main.c
+src/core/mutter.c
 src/core/prefs.c
 src/core/screen.c
 src/core/session.c
@@ -13,7 +16,6 @@ src/core/util.c
 src/core/window.c
 src/core/window-props.c
 src/core/xprops.c
-src/include/all-keybindings.h
 src/mutter.desktop.in
 src/mutter-wm.desktop.in
 src/mutter.schemas.in

src/Makefile.am

@@ -1,89 +1,134 @@
-lib_LTLIBRARIES = libmutter-private.la
+# Flag build for parallelism; see https://savannah.gnu.org/patch/?6905
+.AUTOPARALLEL:
 
-SUBDIRS=wm-tester tools
+lib_LTLIBRARIES = libmutter.la
 
-if WITH_CLUTTER
-SUBDIRS += compositor/mutter/plugins
-endif
+SUBDIRS=wm-tester tools compositor/plugins
 
-INCLUDES=@MUTTER_CFLAGS@ -I $(srcdir)/include -I$(srcdir)/compositor -DMUTTER_LIBEXECDIR=\"$(libexecdir)\" -DHOST_ALIAS=\"@HOST_ALIAS@\" -DMUTTER_LOCALEDIR=\"$(prefix)/@DATADIRNAME@/locale\" -DMUTTER_PKGDATADIR=\"$(pkgdatadir)\" -DMUTTER_DATADIR=\"$(datadir)\" -DG_LOG_DOMAIN=\"mutter\" -DSN_API_NOT_YET_FROZEN=1 -DMUTTER_MAJOR_VERSION=$(MUTTER_MAJOR_VERSION) -DMUTTER_MINOR_VERSION=$(MUTTER_MINOR_VERSION) -DMUTTER_MICRO_VERSION=$(MUTTER_MICRO_VERSION) -DMUTTER_PLUGIN_API_VERSION=$(MUTTER_PLUGIN_API_VERSION) -DMUTTER_PKGLIBDIR=\"$(pkglibdir)\" -DMUTTER_PLUGIN_DIR=\"@MUTTER_PLUGIN_DIR@\"
+INCLUDES=								\
+	$(MUTTER_CFLAGS)						\
+	-I$(srcdir)							\
+	-I$(srcdir)/core						\
+	-I$(srcdir)/ui							\
+	-I$(srcdir)/compositor						\
+	-DMUTTER_LIBEXECDIR=\"$(libexecdir)\"				\
+	-DHOST_ALIAS=\"@HOST_ALIAS@\"					\
+	-DMUTTER_LOCALEDIR=\"$(prefix)/@DATADIRNAME@/locale\"		\
+	-DMUTTER_PKGDATADIR=\"$(pkgdatadir)\"				\
+	-DMUTTER_DATADIR=\"$(datadir)\"					\
+	-DG_LOG_DOMAIN=\"mutter\"					\
+	-DSN_API_NOT_YET_FROZEN=1					\
+	-DMUTTER_MAJOR_VERSION=$(MUTTER_MAJOR_VERSION)			\
+	-DMUTTER_MINOR_VERSION=$(MUTTER_MINOR_VERSION)			\
+	-DMUTTER_MICRO_VERSION=$(MUTTER_MICRO_VERSION)			\
+	-DMUTTER_PLUGIN_API_VERSION=$(MUTTER_PLUGIN_API_VERSION)	\
+	-DMUTTER_PKGLIBDIR=\"$(pkglibdir)\"				\
+	-DMUTTER_PLUGIN_DIR=\"@MUTTER_PLUGIN_DIR@\"			\
+	-DGETTEXT_PACKAGE=\"$(GETTEXT_PACKAGE)\"
 
-mutter_SOURCES= 				\
+mutter_built_sources = \
+	mutter-marshal.h \
+	mutter-marshal.c \
+	mutter-enum-types.h \
+	mutter-enum-types.c
+
+libmutter_la_SOURCES =				\
 	core/async-getprop.c			\
 	core/async-getprop.h			\
-	core/alttabhandler.c			\
-	include/alttabhandler.h			\
-	core/alttabhandlerdefault.c		\
-	include/alttabhandlerdefault.h		\
 	core/bell.c				\
 	core/bell.h				\
 	core/boxes.c				\
-	include/boxes.h				\
+	core/boxes-private.h			\
+	meta/boxes.h				\
+	compositor/cogl-utils.c			\
+	compositor/cogl-utils.h			\
 	compositor/compositor.c			\
 	compositor/compositor-private.h		\
-	compositor/compositor-xrender.c		\
-	compositor/compositor-xrender.h		\
-	include/compositor.h			\
+	compositor/meta-background-actor.c	\
+	compositor/meta-background-actor.h	\
+	compositor/meta-module.c		\
+	compositor/meta-module.h		\
+	compositor/meta-plugin.c		\
+	compositor/meta-plugin-manager.c	\
+	compositor/meta-plugin-manager.h	\
+	compositor/meta-shadow-factory.c	\
+	compositor/meta-shadow-factory-private.h	\
+	compositor/meta-shaped-texture.c	\
+	compositor/meta-shaped-texture.h	\
+	compositor/meta-texture-tower.c		\
+	compositor/meta-texture-tower.h		\
+	compositor/meta-window-actor.c		\
+	compositor/meta-window-actor-private.h	\
+	compositor/meta-window-group.c		\
+	compositor/meta-window-group.h		\
+	compositor/meta-window-shape.c		\
+	compositor/meta-window-shape.h		\
+	compositor/region-utils.c		\
+	compositor/region-utils.h		\
+	meta/compositor.h			\
+	meta/meta-plugin.h			\
+	meta/meta-shadow-factory.h		\
+	meta/meta-window-actor.h		\
+	meta/compositor-mutter.h 		\
+	core/above-tab-keycode.c		\
 	core/constraints.c			\
 	core/constraints.h			\
 	core/core.c				\
 	core/delete.c				\
 	core/display.c				\
 	core/display-private.h			\
-	include/display.h			\
+	meta/display.h				\
 	ui/draw-workspace.c			\
 	ui/draw-workspace.h			\
 	core/edge-resistance.c			\
 	core/edge-resistance.h			\
-	core/effects.c				\
-	core/effects.h				\
 	core/errors.c				\
-	include/errors.h			\
+	meta/errors.h				\
 	core/eventqueue.c			\
 	core/eventqueue.h			\
 	core/frame.c				\
-	core/frame-private.h			\
-	include/frame.h				\
+	core/frame.h				\
 	ui/gradient.c				\
-	ui/gradient.h				\
+	meta/gradient.h				\
 	core/group-private.h			\
 	core/group-props.c			\
 	core/group-props.h			\
 	core/group.c				\
-	include/group.h				\
+	meta/group.h				\
 	core/iconcache.c			\
 	core/iconcache.h			\
 	core/keybindings.c			\
 	core/keybindings-private.h		\
 	core/main.c				\
-	include/main.h				\
-	core/mutter-Xatomtype.h		\
+	core/mutter-Xatomtype.h			\
 	core/place.c				\
 	core/place.h				\
 	core/prefs.c				\
-	include/prefs.h				\
+	meta/prefs.h				\
 	core/screen.c				\
 	core/screen-private.h			\
-	include/screen.h			\
-	include/types.h                         \
+	meta/screen.h				\
+	meta/types.h				\
 	core/session.c				\
 	core/session.h				\
 	core/stack.c				\
 	core/stack.h				\
+	core/stack-tracker.c			\
+	core/stack-tracker.h			\
 	core/util.c				\
-	include/util.h				\
+	meta/util.h				\
 	core/window-props.c			\
 	core/window-props.h			\
 	core/window.c				\
 	core/window-private.h			\
-	include/window.h			\
+	meta/window.h				\
 	core/workspace.c			\
 	core/workspace-private.h		\
 	core/xprops.c				\
-	include/xprops.h			\
-	include/common.h			\
-	include/core.h				\
-	include/ui.h				\
+	core/xprops.h				\
+	meta/common.h				\
+	core/core.h				\
+	ui/ui.h					\
 	inlinepixbufs.h				\
 	ui/fixedtip.c				\
 	ui/fixedtip.h				\
@@ -94,81 +139,55 @@ mutter_SOURCES= 				\
 	ui/metaaccellabel.c			\
 	ui/metaaccellabel.h			\
 	ui/resizepopup.c			\
-	include/resizepopup.h			\
+	ui/resizepopup.h			\
 	ui/tabpopup.c				\
-	include/tabpopup.h				\
+	ui/tabpopup.h				\
+	ui/tile-preview.c			\
+	ui/tile-preview.h			\
 	ui/theme-parser.c			\
-	ui/theme-parser.h			\
 	ui/theme.c				\
-	ui/theme.h				\
-	ui/themewidget.c			\
-	ui/themewidget.h			\
+	meta/theme.h				\
+	ui/theme-private.h			\
 	ui/ui.c					\
-	include/all-keybindings.h
-
-if WITH_CLUTTER
-mutter_SOURCES += 					\
-	compositor/mutter/compositor-mutter.c		\
-	compositor/mutter/mutter-shaped-texture.c	\
-	compositor/mutter/mutter-shaped-texture.h	\
-	compositor/mutter/mutter-plugin-manager.c	\
-	compositor/mutter/mutter-plugin-manager.h	\
-	compositor/mutter/tidy/tidy-texture-frame.c	\
-	compositor/mutter/tidy/tidy-texture-frame.h	\
-	compositor/mutter/mutter-module.c		\
-	compositor/mutter/mutter-module.h		\
-	compositor/mutter/mutter-plugin.c		\
-	include/mutter-plugin.h				\
-	include/compositor-mutter.h
-endif
-
-# by setting libmutter_private_la_CFLAGS, the files shared with
-# mutter proper will be compiled with different names.
-libmutter_private_la_CFLAGS =
-libmutter_private_la_SOURCES=			\
-	core/boxes.c				\
-	include/boxes.h				\
-	ui/gradient.c				\
-	ui/gradient.h				\
-	core/util.c				\
-	include/util.h				\
-	include/common.h			\
+	core/all-keybindings.h			\
+	meta/preview-widget.h			\
 	ui/preview-widget.c			\
-	ui/preview-widget.h			\
-	ui/theme-parser.c			\
-	ui/theme-parser.h			\
-	ui/theme.c				\
-	ui/theme.h
+	$(mutter_built_sources)
 
-libmutter_private_la_LDFLAGS = -no-undefined
-libmutter_private_la_LIBADD  = @MUTTER_LIBS@
-
-libmutterincludedir = $(includedir)/mutter/mutter-private
+libmutter_la_LDFLAGS = -no-undefined
+libmutter_la_LIBADD  = $(MUTTER_LIBS)
 
+# Headers installed for plugins; introspected information will
+# be extracted into Mutter-<version>.gir
 libmutterinclude_base_headers =		\
-	include/alttabhandler.h			\
-	include/boxes.h				\
-	ui/gradient.h				\
-	include/util.h				\
-	include/common.h			\
-	ui/preview-widget.h			\
-	ui/theme-parser.h			\
-	ui/theme.h				\
-	include/prefs.h				\
-	include/window.h			\
-	include/workspace.h			\
-	include/compositor.h			\
-	include/compositor-mutter.h		\
-	include/types.h				\
-	include/screen.h			\
-	include/display.h			\
-	include/group.h				\
-	include/keybindings.h			\
-	include/mutter-plugin.h
+	meta/boxes.h				\
+	meta/common.h				\
+	meta/compositor-mutter.h		\
+	meta/compositor.h			\
+	meta/display.h				\
+	meta/errors.h				\
+	meta/gradient.h				\
+	meta/group.h				\
+	meta/keybindings.h			\
+	meta/main.h				\
+	meta/meta-plugin.h			\
+	meta/meta-shadow-factory.h		\
+	meta/meta-window-actor.h		\
+	meta/prefs.h				\
+	meta/screen.h				\
+	meta/theme.h				\
+	meta/types.h				\
+	meta/util.h				\
+	meta/window.h				\
+	meta/workspace.h
 
 # Excluded from scanning for introspection but installed
+# atomnames.h: macros cause problems for scanning process
 libmutterinclude_extra_headers =		\
-	include/atomnames.h
+	meta/preview-widget.h			\
+	meta/atomnames.h
+
+libmutterincludedir = $(includedir)/mutter/meta
 
 libmutterinclude_HEADERS =			\
 	$(libmutterinclude_base_headers)	\
@@ -179,9 +198,14 @@ mutter_theme_viewer_SOURCES=  \
 
 bin_PROGRAMS=mutter mutter-theme-viewer
 
+mutter_SOURCES = core/mutter.c
+mutter_LDADD = $(MUTTER_LIBS) libmutter.la
+
+if HAVE_INTROSPECTION
+include $(INTROSPECTION_MAKEFILE)
+
 api_version = $(MUTTER_MAJOR_VERSION).$(MUTTER_MINOR_VERSION)
 
-if WITH_INTROSPECTION
 # These files are in package-private directories, even though they may be used
 # by plugins.  If you're writing a plugin, use g-ir-compiler --add-include-path
 # and g-ir-compiler --includedir.
@@ -191,44 +215,32 @@ gir_DATA = Meta-$(api_version).gir
 typelibdir = $(pkglibdir)
 typelib_DATA = Meta-$(api_version).typelib
 
-# We need to strip out the attribute that would point back to libmutter-introspect
-# so that libgirepository looks for symbols in the executable instead
-Meta-$(api_version).gir: $(G_IR_SCANNER) mutter $(libmutterinclude_HEADERS) $(mutter_SOURCES)
-	$(G_IR_SCANNER)					\
-		--namespace=Meta			\
-		--nsversion=$(api_version)		\
-		--include=GObject-2.0			\
-		--include=Gdk-2.0			\
-		--include=Gtk-2.0			\
-		--include=Clutter-0.9			\
-		--pkg=clutter-0.9			\
-		--pkg=gtk+-2.0				\
-		--include=xfixes-4.0			\
-		--program=./mutter			\
-		$(filter %.c,$(mutter_SOURCES))	\
-		$(libmutterinclude_base_headers)	\
-		$(INCLUDES)				\
-		-o $@
+INTROSPECTION_GIRS = Meta-$(api_version).gir
+
+Meta-$(api_version).gir: libmutter.la
+@META_GIR@_INCLUDES = GObject-2.0 Gdk-3.0 Gtk-3.0 Clutter-1.0 xlib-2.0 xfixes-4.0
+@META_GIR@_PACKAGES = clutter-1.0 gtk+-3.0
+@META_GIR@_CFLAGS = $(INCLUDES)
+@META_GIR@_LIBS = libmutter.la
+@META_GIR@_FILES =				\
+	mutter-enum-types.h			\
+	$(libmutterinclude_base_headers)	\
+	$(filter %.c,$(libmutter_la_SOURCES))
+@META_GIR@_SCANNERFLAGS = --warn-all --warn-error
 
-Meta-$(api_version).typelib: $(G_IR_COMPILER) Meta-$(api_version).gir
-	LD_LIBRARY_PATH=$${LD_LIBRARY_PATH:+$$LD_LIBRARY_PATH:}. $(G_IR_COMPILER) Meta-$(api_version).gir -o $@
 endif
 
-EFENCE=
-mutter_LDADD=@MUTTER_LIBS@ libmutter-private.la $(EFENCE)
-mutter_LDFLAGS=-export-dynamic
+mutter_theme_viewer_LDADD= $(MUTTER_LIBS) libmutter.la
 
-mutter_theme_viewer_LDADD= @MUTTER_LIBS@ libmutter-private.la
-
-testboxes_SOURCES=include/util.h core/util.c include/boxes.h core/boxes.c core/testboxes.c
-testgradient_SOURCES=ui/gradient.h ui/gradient.c ui/testgradient.c
-testasyncgetprop_SOURCES=core/async-getprop.h core/async-getprop.c core/testasyncgetprop.c
+testboxes_SOURCES = core/testboxes.c
+testgradient_SOURCES = ui/testgradient.c
+testasyncgetprop_SOURCES = core/testasyncgetprop.c
 
 noinst_PROGRAMS=testboxes testgradient testasyncgetprop
 
-testboxes_LDADD= @MUTTER_LIBS@ libmutter-private.la
-testgradient_LDADD= @MUTTER_LIBS@ libmutter-private.la
-testasyncgetprop_LDADD= @MUTTER_LIBS@ libmutter-private.la
+testboxes_LDADD = $(MUTTER_LIBS) libmutter.la
+testgradient_LDADD = $(MUTTER_LIBS) libmutter.la
+testasyncgetprop_LDADD = $(MUTTER_LIBS) libmutter.la
 
 @INTLTOOL_DESKTOP_RULE@
 
@@ -242,7 +254,7 @@ wmproperties_in_files=mutter-wm.desktop.in
 wmproperties_files=$(wmproperties_in_files:.desktop.in=.desktop)
 wmproperties_DATA = $(wmproperties_files)
 
-schemadir   = @GCONF_SCHEMA_FILE_DIR@
+schemadir   = $(GCONF_SCHEMA_FILE_DIR)
 schema_in_files = mutter.schemas.in
 schema_DATA = $(schema_in_files:.schemas.in=.schemas)
 
@@ -263,21 +275,73 @@ VARIABLES=stock_maximize_data $(srcdir)/stock_maximize.png \
           stock_delete_data $(srcdir)/stock_delete.png
 
 BUILT_SOURCES = inlinepixbufs.h
-CLEANFILES = inlinepixbufs.h mutter.desktop mutter-wm.desktop mutter.schemas
+CLEANFILES =					\
+	inlinepixbufs.h				\
+	mutter.desktop				\
+	mutter-wm.desktop			\
+	mutter.schemas				\
+	$(mutter_built_sources)			\
+	$(typelib_DATA)				\
+	$(gir_DATA)
 
 inlinepixbufs.h: $(IMAGES)
 	$(GDK_PIXBUF_CSOURCE) --raw --build-list $(VARIABLES) >$(srcdir)/inlinepixbufs.h
 
 pkgconfigdir = $(libdir)/pkgconfig
 
-pkgconfig_DATA = libmutter-private.pc mutter-plugins.pc
+pkgconfig_DATA = libmutter.pc mutter-plugins.pc
 
 EXTRA_DIST=$(desktopfiles_files) 	\
 	$(wmproperties_files)		\
-	$(IMAGES) $(schema_DATA) 	\
+	$(IMAGES) 			\
 	$(desktopfiles_in_files)	\
 	$(wmproperties_in_files)	\
 	$(schema_in_files)		\
-	libmutter-private.pc.in	\
-	mutter-plugins.pc.in
+	libmutter.pc.in \
+	mutter-plugins.pc.in  \
+	mutter-enum-types.h.in \
+	mutter-enum-types.c.in \
+	mutter-marshal.list
 
+BUILT_SOURCES += $(mutter_built_sources)
+MUTTER_STAMP_FILES = stamp-mutter-marshal.h stamp-mutter-enum-types.h
+CLEANFILES += $(MUTTER_STAMP_FILES)
+
+mutter-marshal.h: stamp-mutter-marshal.h
+	@true
+stamp-mutter-marshal.h: Makefile mutter-marshal.list
+	$(AM_V_GEN) $(GLIB_GENMARSHAL) \
+		--prefix=_mutter_marshal \
+		--header \
+	$(srcdir)/mutter-marshal.list > xgen-tmh && \
+	(cmp -s xgen-tmh mutter-marshal.h || cp -f xgen-tmh mutter-marshal.h) && \
+	rm -f xgen-tmh && \
+	echo timestamp > $(@F)
+
+mutter-marshal.c: Makefile mutter-marshal.list
+	 $(AM_V_GEN) (echo "#include \"mutter-marshal.h\"" ; \
+	 $(GLIB_GENMARSHAL) \
+		--prefix=_mutter_marshal \
+		--body \
+	 $(srcdir)/mutter-marshal.list ) > xgen-tmc && \
+	cp -f xgen-tmc mutter-marshal.c && \
+	rm -f xgen-tmc
+
+mutter-enum-types.h: stamp-mutter-enum-types.h Makefile
+	@true
+stamp-mutter-enum-types.h: $(libmutterinclude_base_headers) mutter-enum-types.h.in
+	$(AM_V_GEN) ( cd $(srcdir) && \
+	  $(GLIB_MKENUMS) \
+	    --template $(srcdir)/mutter-enum-types.h.in \
+	  $(libmutterinclude_base_headers) ) >> xgen-teth && \
+	(cmp -s xgen-teth mutter-enum-types.h || cp xgen-teth mutter-enum-types.h) && \
+	rm -f xgen-teth && \
+	echo timestamp > $(@F)
+
+mutter-enum-types.c: stamp-mutter-enum-types.h mutter-enum-types.c.in
+	  $(AM_V_GEN) ( cd $(srcdir) && \
+	  $(GLIB_MKENUMS) \
+	    --template $(srcdir)/mutter-enum-types.c.in \
+	  $(libmutterinclude_base_headers) ) >> xgen-tetc && \
+	cp xgen-tetc mutter-enum-types.c && \
+	rm -f xgen-tetc

src/compositor/cogl-utils.c

@@ -0,0 +1,104 @@
+/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
+/*
+ * Utilities for use with Cogl
+ *
+ * Copyright 2010 Red Hat, Inc.
+ * Copyright 2010 Intel Corporation
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.
+ */
+
+#include "cogl-utils.h"
+
+/**
+ * meta_create_color_texture_4ub:
+ * @red:
+ * @green:
+ * @blue:
+ * @alpha:
+ *
+ * Creates a texture that is a single pixel with the specified
+ * unpremultiplied color components.
+ *
+ * Return value: (transfer full): a newly created Cogl texture
+ */
+CoglHandle
+meta_create_color_texture_4ub (guint8 red,
+                               guint8 green,
+                               guint8 blue,
+                               guint8 alpha)
+{
+  CoglColor color;
+  guint8 pixel[4];
+
+  cogl_color_set_from_4ub (&color, red, green, blue, alpha);
+  cogl_color_premultiply (&color);
+
+  pixel[0] = cogl_color_get_red_byte (&color);
+  pixel[1] = cogl_color_get_green_byte (&color);
+  pixel[2] = cogl_color_get_blue_byte (&color);
+  pixel[3] = cogl_color_get_alpha_byte (&color);
+
+  return cogl_texture_new_from_data (1, 1,
+                                     COGL_TEXTURE_NONE,
+                                     COGL_PIXEL_FORMAT_RGBA_8888_PRE,
+                                     COGL_PIXEL_FORMAT_ANY,
+                                     4, pixel);
+}
+
+
+/* Based on gnome-shell/src/st/st-private.c:_st_create_texture_material.c */
+
+/**
+ * meta_create_texture_material:
+ * @src_texture: (allow-none): texture to use initially for the layer
+ *
+ * Creates a material with a single layer. Using a common template
+ * allows sharing a shader for different uses in Mutter. To share the same
+ * shader with all other materials that are just texture plus opacity
+ * would require Cogl fixes.
+ * (See http://bugzilla.clutter-project.org/show_bug.cgi?id=2425)
+ *
+ * Return value: (transfer full): a newly created Cogl material
+ */
+CoglHandle
+meta_create_texture_material (CoglHandle src_texture)
+{
+  static CoglHandle texture_material_template = COGL_INVALID_HANDLE;
+  CoglHandle material;
+
+  /* We use a material that has a dummy texture as a base for all
+     texture materials. The idea is that only the Cogl texture object
+     would be different in the children so it is likely that Cogl will
+     be able to share GL programs between all the textures. */
+  if (G_UNLIKELY (texture_material_template == COGL_INVALID_HANDLE))
+    {
+      CoglHandle dummy_texture;
+
+      dummy_texture = meta_create_color_texture_4ub (0xff, 0xff, 0xff, 0xff);
+
+      texture_material_template = cogl_material_new ();
+      cogl_material_set_layer (texture_material_template, 0, dummy_texture);
+      cogl_handle_unref (dummy_texture);
+    }
+
+  material = cogl_material_copy (texture_material_template);
+
+  if (src_texture != COGL_INVALID_HANDLE)
+    cogl_material_set_layer (material, 0, src_texture);
+
+  return material;
+}

src/compositor/cogl-utils.h

@@ -1,7 +1,8 @@
 /* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
-
 /*
- * Copyright (C) 2008 Iain Holmes
+ * Utilities for use with Cogl
+ *
+ * Copyright 2010 Red Hat, Inc.
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License as
@@ -19,13 +20,15 @@
  * 02111-1307, USA.
  */
 
-#ifndef META_FRAME_H
-#define META_FRAME_H
+#ifndef __META_COGL_UTILS_H__
+#define __META_COGL_UTILS_H__
 
-#include <X11/Xlib.h>
+#include <cogl/cogl.h>
 
-#include "types.h"
+CoglHandle meta_create_color_texture_4ub (guint8     red,
+                                          guint8     green,
+                                          guint8     blue,
+                                          guint8     alpha);
+CoglHandle meta_create_texture_material  (CoglHandle src_texture);
 
-Window meta_frame_get_xwindow (MetaFrame *frame);
-
-#endif
+#endif /* __META_COGL_UTILS_H__ */

src/compositor/compositor-private.h

@@ -1,90 +1,69 @@
 /* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
 
-/*
- * Copyright (C) 2008 Iain Holmes
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of the
- * License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
- * 02111-1307, USA.
- */
-
 #ifndef META_COMPOSITOR_PRIVATE_H
 #define META_COMPOSITOR_PRIVATE_H
 
-#include "compositor.h"
+#include <X11/extensions/Xfixes.h>
+
+#include <meta/compositor.h>
+#include <meta/display.h>
+#include "meta-plugin-manager.h"
+#include <clutter/clutter.h>
+
+typedef struct _MetaCompScreen MetaCompScreen;
 
 struct _MetaCompositor
 {
-  void (* destroy) (MetaCompositor *compositor);
+  MetaDisplay    *display;
 
-  void (*manage_screen) (MetaCompositor *compositor,
-                         MetaScreen     *screen);
-  void (*unmanage_screen) (MetaCompositor *compositor,
-                           MetaScreen     *screen);
-  void (*add_window) (MetaCompositor    *compositor,
-                      MetaWindow        *window);
-  void (*remove_window) (MetaCompositor *compositor,
-                         MetaWindow     *window);
-  void (*set_updates) (MetaCompositor *compositor,
-                       MetaWindow     *window,
-                       gboolean        update);
-  gboolean (*process_event) (MetaCompositor *compositor,
-                             XEvent         *event,
-                             MetaWindow     *window);
-  Pixmap (*get_window_pixmap) (MetaCompositor *compositor,
-                               MetaWindow     *window);
-  void (*set_active_window) (MetaCompositor *compositor,
-                             MetaScreen     *screen,
-                             MetaWindow     *window);
-  void (*map_window) (MetaCompositor *compositor,
-                      MetaWindow     *window);
-  void (*unmap_window) (MetaCompositor *compositor,
-			MetaWindow     *window);
-  void (*minimize_window) (MetaCompositor *compositor,
-                           MetaWindow     *window,
-			   MetaRectangle  *window_rect,
-			   MetaRectangle  *icon_rect);
-  void (*unminimize_window) (MetaCompositor *compositor,
-			     MetaWindow     *window,
-			     MetaRectangle  *window_rect,
-			     MetaRectangle  *icon_rect);
-  void (*maximize_window) (MetaCompositor    *compositor,
-                           MetaWindow        *window,
-			   MetaRectangle     *window_rect);
-  void (*unmaximize_window) (MetaCompositor    *compositor,
-                             MetaWindow        *window,
-			     MetaRectangle     *window_rect);
-  void (*update_workspace_geometry) (MetaCompositor *compositor,
-                                     MetaWorkspace   *workspace);
-  void (*switch_workspace) (MetaCompositor     *compositor,
-                            MetaScreen         *screen,
-                            MetaWorkspace      *from,
-                            MetaWorkspace      *to,
-                            MetaMotionDirection direction);
-  void (*sync_stack) (MetaCompositor *compositor,
-		      MetaScreen     *screen,
-		      GList	     *stack);
-  void (*set_window_hidden) (MetaCompositor *compositor,
-			     MetaScreen	    *screen,
-			     MetaWindow	    *window,
-			     gboolean	     hidden);
-  void (*sync_window_geometry) (MetaCompositor	*compositor,
-				MetaWindow	*window);
-  void (*sync_screen_size) (MetaCompositor *compositor,
-			    MetaScreen	   *screen,
-			    guint	    width,
-			    guint	    height);
+  Atom            atom_x_root_pixmap;
+  Atom            atom_x_set_root;
+  Atom            atom_net_wm_window_opacity;
+  guint           repaint_func_id;
+
+  ClutterActor   *shadow_src;
+
+  MetaPlugin     *modal_plugin;
+
+  gboolean        show_redraw : 1;
+  gboolean        debug       : 1;
+  gboolean        no_mipmaps  : 1;
 };
 
-#endif
+struct _MetaCompScreen
+{
+  MetaScreen            *screen;
+
+  ClutterActor          *stage, *window_group, *overlay_group;
+  ClutterActor          *background_actor;
+  ClutterActor		*hidden_group;
+  GList                 *windows;
+  GHashTable            *windows_by_xid;
+  Window                 output;
+
+  /* Before we create the output window */
+  XserverRegion     pending_input_region;
+
+  gint                   switch_workspace_in_progress;
+
+  MetaPluginManager *plugin_mgr;
+};
+
+void meta_switch_workspace_completed (MetaScreen    *screen);
+void meta_set_stage_input_region     (MetaScreen    *screen,
+                                      XserverRegion  region);
+void meta_empty_stage_input_region   (MetaScreen    *screen);
+
+gboolean meta_begin_modal_for_plugin (MetaScreen       *screen,
+                                      MetaPlugin       *plugin,
+                                      Window            grab_window,
+                                      Cursor            cursor,
+                                      MetaModalOptions  options,
+                                      guint32           timestamp);
+void     meta_end_modal_for_plugin   (MetaScreen       *screen,
+                                      MetaPlugin       *plugin,
+                                      guint32           timestamp);
+
+void meta_check_end_modal (MetaScreen *screen);
+
+#endif /* META_COMPOSITOR_PRIVATE_H */

src/compositor/meta-background-actor.c

@@ -0,0 +1,418 @@
+/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
+/*
+ * meta-background-actor.c: Actor for painting the root window background
+ *
+ * Copyright 2009 Sander Dijkhuis
+ * Copyright 2010 Red Hat, Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.
+ *
+ * Portions adapted from gnome-shell/src/shell-global.c
+ */
+
+#include <config.h>
+
+#define COGL_ENABLE_EXPERIMENTAL_API
+#include <cogl/cogl-texture-pixmap-x11.h>
+
+#include <X11/Xatom.h>
+
+#include "cogl-utils.h"
+#include "compositor-private.h"
+#include <meta/errors.h>
+#include "meta-background-actor.h"
+
+struct _MetaBackgroundActorClass
+{
+  ClutterActorClass parent_class;
+};
+
+struct _MetaBackgroundActor
+{
+  ClutterActor parent;
+
+  CoglHandle material;
+  MetaScreen *screen;
+  cairo_region_t *visible_region;
+  float texture_width;
+  float texture_height;
+
+  guint have_pixmap : 1;
+};
+
+G_DEFINE_TYPE (MetaBackgroundActor, meta_background_actor, CLUTTER_TYPE_ACTOR);
+
+static void
+update_wrap_mode (MetaBackgroundActor *self)
+{
+  int width, height;
+  CoglMaterialWrapMode wrap_mode;
+
+  meta_screen_get_size (self->screen, &width, &height);
+
+  /* We turn off repeating when we have a full-screen pixmap to keep from
+   * getting artifacts from one side of the image sneaking into the other
+   * side of the image via bilinear filtering.
+   */
+  if (width == self->texture_width && height == self->texture_height)
+    wrap_mode = COGL_MATERIAL_WRAP_MODE_CLAMP_TO_EDGE;
+  else
+    wrap_mode = COGL_MATERIAL_WRAP_MODE_REPEAT;
+
+  cogl_material_set_layer_wrap_mode (self->material, 0, wrap_mode);
+}
+
+static void
+set_texture (MetaBackgroundActor *self,
+             CoglHandle           texture)
+{
+  MetaDisplay *display;
+
+  display = meta_screen_get_display (self->screen);
+
+  /* This may trigger destruction of an old texture pixmap, which, if
+   * the underlying X pixmap is already gone has the tendency to trigger
+   * X errors inside DRI. For safety, trap errors */
+  meta_error_trap_push (display);
+  cogl_material_set_layer (self->material, 0, texture);
+  meta_error_trap_pop (display);
+
+  self->texture_width = cogl_texture_get_width (texture);
+  self->texture_height = cogl_texture_get_height (texture);
+
+  update_wrap_mode (self);
+
+  clutter_actor_queue_redraw (CLUTTER_ACTOR (self));
+}
+
+/* Sets our material to paint with a 1x1 texture of the stage's background
+ * color; doing this when we have no pixmap allows the application to turn
+ * off painting the stage. There might be a performance benefit to
+ * painting in this case with a solid color, but the normal solid color
+ * case is a 1x1 root pixmap, so we'd have to reverse-engineer that to
+ * actually pick up the (small?) performance win. This is just a fallback.
+ */
+static void
+set_texture_to_stage_color (MetaBackgroundActor *self)
+{
+  ClutterActor *stage = meta_get_stage_for_screen (self->screen);
+  ClutterColor color;
+  CoglHandle texture;
+
+  clutter_stage_get_color (CLUTTER_STAGE (stage), &color);
+  texture = meta_create_color_texture_4ub (color.red, color.green,
+                                           color.blue, 0xff);
+  set_texture (self, texture);
+  cogl_handle_unref (texture);
+}
+
+static void
+on_notify_stage_color (GObject             *stage,
+                       GParamSpec          *pspec,
+                       MetaBackgroundActor *self)
+{
+  if (!self->have_pixmap)
+    set_texture_to_stage_color (self);
+}
+
+static void
+meta_background_actor_dispose (GObject *object)
+{
+  MetaBackgroundActor *self = META_BACKGROUND_ACTOR (object);
+
+  meta_background_actor_set_visible_region (self, NULL);
+
+  if (self->material != COGL_INVALID_HANDLE)
+    {
+      cogl_handle_unref (self->material);
+      self->material = COGL_INVALID_HANDLE;
+    }
+
+  if (self->screen != NULL)
+    {
+      ClutterActor *stage = meta_get_stage_for_screen (self->screen);
+      g_signal_handlers_disconnect_by_func (stage,
+                                            (gpointer) on_notify_stage_color,
+                                            self);
+      self->screen = NULL;
+    }
+}
+
+static void
+meta_background_actor_get_preferred_width (ClutterActor *actor,
+                                           gfloat        for_height,
+                                           gfloat       *min_width_p,
+                                           gfloat       *natural_width_p)
+{
+  MetaBackgroundActor *self = META_BACKGROUND_ACTOR (actor);
+  int width, height;
+
+  meta_screen_get_size (self->screen, &width, &height);
+
+  if (min_width_p)
+    *min_width_p = width;
+  if (natural_width_p)
+    *natural_width_p = height;
+}
+
+static void
+meta_background_actor_get_preferred_height (ClutterActor *actor,
+                                            gfloat        for_width,
+                                            gfloat       *min_height_p,
+                                            gfloat       *natural_height_p)
+
+{
+  MetaBackgroundActor *self = META_BACKGROUND_ACTOR (actor);
+  int width, height;
+
+  meta_screen_get_size (self->screen, &width, &height);
+
+  if (min_height_p)
+    *min_height_p = height;
+  if (natural_height_p)
+    *natural_height_p = height;
+}
+
+static void
+meta_background_actor_paint (ClutterActor *actor)
+{
+  MetaBackgroundActor *self = META_BACKGROUND_ACTOR (actor);
+  guchar opacity = clutter_actor_get_paint_opacity (actor);
+  int width, height;
+
+  meta_screen_get_size (self->screen, &width, &height);
+
+  cogl_material_set_color4ub (self->material,
+                              opacity, opacity, opacity, opacity);
+
+  cogl_set_source (self->material);
+
+  if (self->visible_region)
+    {
+      int n_rectangles = cairo_region_num_rectangles (self->visible_region);
+      int i;
+
+      for (i = 0; i < n_rectangles; i++)
+        {
+          cairo_rectangle_int_t rect;
+          cairo_region_get_rectangle (self->visible_region, i, &rect);
+
+          cogl_rectangle_with_texture_coords (rect.x, rect.y,
+                                              rect.x + rect.width, rect.y + rect.height,
+                                              rect.x / self->texture_width,
+                                              rect.y / self->texture_height,
+                                              (rect.x + rect.width) / self->texture_width,
+                                              (rect.y + rect.height) / self->texture_height);
+        }
+    }
+  else
+    {
+      cogl_rectangle_with_texture_coords (0.0f, 0.0f,
+                                          width, height,
+                                          0.0f, 0.0f,
+                                          width / self->texture_width,
+                                          height / self->texture_height);
+    }
+}
+
+#if CLUTTER_CHECK_VERSION(1, 5, 2)
+static gboolean
+meta_background_actor_get_paint_volume (ClutterActor       *actor,
+                                        ClutterPaintVolume *volume)
+{
+  MetaBackgroundActor *self = META_BACKGROUND_ACTOR (actor);
+  int width, height;
+
+  meta_screen_get_size (self->screen, &width, &height);
+
+  clutter_paint_volume_set_width (volume, width);
+  clutter_paint_volume_set_height (volume, height);
+
+  return TRUE;
+}
+#endif
+
+static void
+meta_background_actor_class_init (MetaBackgroundActorClass *klass)
+{
+  GObjectClass *object_class = G_OBJECT_CLASS (klass);
+  ClutterActorClass *actor_class = CLUTTER_ACTOR_CLASS (klass);
+
+  object_class->dispose = meta_background_actor_dispose;
+
+  actor_class->get_preferred_width = meta_background_actor_get_preferred_width;
+  actor_class->get_preferred_height = meta_background_actor_get_preferred_height;
+  actor_class->paint = meta_background_actor_paint;
+#if CLUTTER_CHECK_VERSION(1, 5, 2)
+  actor_class->get_paint_volume = meta_background_actor_get_paint_volume;
+#endif
+}
+
+static void
+meta_background_actor_init (MetaBackgroundActor *background_actor)
+{
+}
+
+/**
+ * @screen: the #MetaScreen
+ * meta_background_actor_new:
+ *
+ * Creates a new actor to draw the background for the given screen.
+ *
+ * Return value: (transfer none): the newly created background actor
+ */
+ClutterActor *
+meta_background_actor_new (MetaScreen *screen)
+{
+  MetaBackgroundActor *self;
+  ClutterActor *stage;
+
+  g_return_val_if_fail (META_IS_SCREEN (screen), NULL);
+
+  self = g_object_new (META_TYPE_BACKGROUND_ACTOR, NULL);
+
+  self->screen = screen;
+
+  self->material = meta_create_texture_material (NULL);
+  cogl_material_set_layer_wrap_mode (self->material, 0,
+                                     COGL_MATERIAL_WRAP_MODE_REPEAT);
+
+  stage = meta_get_stage_for_screen (self->screen);
+  g_signal_connect (stage, "notify::color",
+                    G_CALLBACK (on_notify_stage_color), self);
+
+  meta_background_actor_update (self);
+
+  return CLUTTER_ACTOR (self);
+}
+
+/**
+ * meta_background_actor_update:
+ * @self: a #MetaBackgroundActor
+ *
+ * Refetches the _XROOTPMAP_ID property for the root window and updates
+ * the contents of the background actor based on that. There's no attempt
+ * to optimize out pixmap values that don't change (since a root pixmap
+ * could be replaced by with another pixmap with the same ID under some
+ * circumstances), so this should only be called when we actually receive
+ * a PropertyNotify event for the property.
+ */
+void
+meta_background_actor_update (MetaBackgroundActor *self)
+{
+  MetaDisplay *display;
+  MetaCompositor *compositor;
+  Atom type;
+  int format;
+  gulong nitems;
+  gulong bytes_after;
+  guchar *data;
+  Pixmap root_pixmap_id;
+
+  g_return_if_fail (META_IS_BACKGROUND_ACTOR (self));
+
+  display = meta_screen_get_display (self->screen);
+  compositor = meta_display_get_compositor (display);
+
+  root_pixmap_id = None;
+  if (!XGetWindowProperty (meta_display_get_xdisplay (display),
+                           meta_screen_get_xroot  (self->screen),
+                           compositor->atom_x_root_pixmap,
+                           0, LONG_MAX,
+                           False,
+                           AnyPropertyType,
+                           &type, &format, &nitems, &bytes_after, &data) &&
+      type != None)
+  {
+     /* Got a property. */
+     if (type == XA_PIXMAP && format == 32 && nitems == 1)
+       {
+         /* Was what we expected. */
+         root_pixmap_id = *(Pixmap *)data;
+       }
+
+     XFree(data);
+  }
+
+  if (root_pixmap_id != None)
+    {
+      CoglHandle texture;
+
+      meta_error_trap_push (display);
+      texture = cogl_texture_pixmap_x11_new (root_pixmap_id, FALSE);
+      meta_error_trap_pop (display);
+
+      if (texture != COGL_INVALID_HANDLE)
+        {
+          set_texture (self, texture);
+          cogl_handle_unref (texture);
+
+          self->have_pixmap = True;
+          return;
+        }
+    }
+
+  self->have_pixmap = False;
+  set_texture_to_stage_color (self);
+}
+
+/**
+ * meta_background_actor_set_visible_region:
+ * @self: a #MetaBackgroundActor
+ * @visible_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_visible_region (MetaBackgroundActor *self,
+                                          cairo_region_t      *visible_region)
+{
+  g_return_if_fail (META_IS_BACKGROUND_ACTOR (self));
+
+  if (self->visible_region)
+    {
+      cairo_region_destroy (self->visible_region);
+      self->visible_region = NULL;
+    }
+
+  if (visible_region)
+    {
+      cairo_rectangle_int_t screen_rect = { 0 };
+      meta_screen_get_size (self->screen, &screen_rect.width, &screen_rect.height);
+
+      /* Doing the intersection here is probably unnecessary - MetaWindowGroup
+       * should never compute a visible area that's larger than the root screen!
+       * but it's not that expensive and adds some extra robustness.
+       */
+      self->visible_region = cairo_region_create_rectangle (&screen_rect);
+      cairo_region_intersect (self->visible_region, visible_region);
+    }
+}
+
+/**
+ * meta_background_actor_screen_size_changed:
+ * @self: a #MetaBackgroundActor
+ *
+ * Called by the compositor when the size of the #MetaScreen changes
+ */
+void
+meta_background_actor_screen_size_changed (MetaBackgroundActor *self)
+{
+  update_wrap_mode (self);
+  clutter_actor_queue_relayout (CLUTTER_ACTOR (self));
+}

src/compositor/meta-background-actor.h

@@ -0,0 +1,58 @@
+/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
+/*
+ * meta-background-actor.h: Actor for painting the root window background
+ *
+ * Copyright 2010 Red Hat, Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.
+ */
+
+#ifndef META_BACKGROUND_ACTOR_H
+#define META_BACKGROUND_ACTOR_H
+
+#include <clutter/clutter.h>
+
+#include <meta/screen.h>
+
+/**
+ * MetaBackgroundActor:
+ *
+ * This class handles tracking and painting the root window background.
+ * By integrating with #MetaWindowGroup we can avoid painting parts of
+ * the background that are obscured by other windows.
+ */
+
+#define META_TYPE_BACKGROUND_ACTOR            (meta_background_actor_get_type ())
+#define META_BACKGROUND_ACTOR(obj)            (G_TYPE_CHECK_INSTANCE_CAST ((obj), META_TYPE_BACKGROUND_ACTOR, MetaBackgroundActor))
+#define META_BACKGROUND_ACTOR_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST ((klass), META_TYPE_BACKGROUND_ACTOR, MetaBackgroundActorClass))
+#define META_IS_BACKGROUND_ACTOR(obj)         (G_TYPE_CHECK_INSTANCE_TYPE ((obj), META_TYPE_BACKGROUND_ACTOR))
+#define META_IS_BACKGROUND_ACTOR_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), META_TYPE_BACKGROUND_ACTOR))
+#define META_BACKGROUND_ACTOR_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS ((obj), META_TYPE_BACKGROUND_ACTOR, MetaBackgroundActorClass))
+
+typedef struct _MetaBackgroundActor        MetaBackgroundActor;
+typedef struct _MetaBackgroundActorClass   MetaBackgroundActorClass;
+typedef struct _MetaBackgroundActorPrivate MetaBackgroundActorPrivate;
+
+GType meta_background_actor_get_type (void);
+
+ClutterActor *meta_background_actor_new (MetaScreen *screen);
+
+void meta_background_actor_update              (MetaBackgroundActor *actor);
+void meta_background_actor_set_visible_region  (MetaBackgroundActor *self,
+                                                cairo_region_t      *visible_region);
+void meta_background_actor_screen_size_changed (MetaBackgroundActor *self);
+
+#endif /* META_BACKGROUND_ACTOR_H */

src/compositor/meta-module.c

@@ -21,8 +21,8 @@
  * 02111-1307, USA.
  */
 
-#include "mutter-plugin.h"
-#include "mutter-module.h"
+#include <meta/meta-plugin.h>
+#include "meta-module.h"
 
 #include <gmodule.h>
 
@@ -32,23 +32,23 @@ enum
   PROP_PATH,
 };
 
-struct _MutterModulePrivate
+struct _MetaModulePrivate
 {
   GModule      *lib;
   gchar        *path;
   GType         plugin_type;
 };
 
-#define MUTTER_MODULE_GET_PRIVATE(obj) \
-(G_TYPE_INSTANCE_GET_PRIVATE ((obj), MUTTER_TYPE_MODULE, MutterModulePrivate))
+#define META_MODULE_GET_PRIVATE(obj) \
+(G_TYPE_INSTANCE_GET_PRIVATE ((obj), META_TYPE_MODULE, MetaModulePrivate))
 
-G_DEFINE_TYPE (MutterModule, mutter_module, G_TYPE_TYPE_MODULE);
+G_DEFINE_TYPE (MetaModule, meta_module, G_TYPE_TYPE_MODULE);
 
 static gboolean
-mutter_module_load (GTypeModule *gmodule)
+meta_module_load (GTypeModule *gmodule)
 {
-  MutterModulePrivate  *priv = MUTTER_MODULE (gmodule)->priv;
-  MutterPluginVersion  *info = NULL;
+  MetaModulePrivate  *priv = META_MODULE (gmodule)->priv;
+  MetaPluginVersion  *info = NULL;
   GType                (*register_type) (GTypeModule *) = NULL;
 
   if (priv->lib && priv->plugin_type)
@@ -64,9 +64,9 @@ mutter_module_load (GTypeModule *gmodule)
       return FALSE;
     }
 
-  if (g_module_symbol (priv->lib, "mutter_plugin_version",
+  if (g_module_symbol (priv->lib, "meta_plugin_version",
                        (gpointer *)(void *)&info) &&
-      g_module_symbol (priv->lib, "mutter_plugin_register_type",
+      g_module_symbol (priv->lib, "meta_plugin_register_type",
 		       (gpointer *)(void *)&register_type) &&
       info && register_type)
     {
@@ -97,9 +97,9 @@ mutter_module_load (GTypeModule *gmodule)
 }
 
 static void
-mutter_module_unload (GTypeModule *gmodule)
+meta_module_unload (GTypeModule *gmodule)
 {
-  MutterModulePrivate *priv = MUTTER_MODULE (gmodule)->priv;
+  MetaModulePrivate *priv = META_MODULE (gmodule)->priv;
 
   g_module_close (priv->lib);
 
@@ -108,29 +108,29 @@ mutter_module_unload (GTypeModule *gmodule)
 }
 
 static void
-mutter_module_dispose (GObject *object)
+meta_module_dispose (GObject *object)
 {
-  G_OBJECT_CLASS (mutter_module_parent_class)->dispose (object);
+  G_OBJECT_CLASS (meta_module_parent_class)->dispose (object);
 }
 
 static void
-mutter_module_finalize (GObject *object)
+meta_module_finalize (GObject *object)
 {
-  MutterModulePrivate *priv = MUTTER_MODULE (object)->priv;
+  MetaModulePrivate *priv = META_MODULE (object)->priv;
 
   g_free (priv->path);
   priv->path = NULL;
 
-  G_OBJECT_CLASS (mutter_module_parent_class)->finalize (object);
+  G_OBJECT_CLASS (meta_module_parent_class)->finalize (object);
 }
 
 static void
-mutter_module_set_property (GObject      *object,
-			    guint         prop_id,
-			    const GValue *value,
-			    GParamSpec   *pspec)
+meta_module_set_property (GObject      *object,
+                          guint         prop_id,
+                          const GValue *value,
+                          GParamSpec   *pspec)
 {
-  MutterModulePrivate *priv = MUTTER_MODULE (object)->priv;
+  MetaModulePrivate *priv = META_MODULE (object)->priv;
 
   switch (prop_id)
     {
@@ -145,12 +145,12 @@ mutter_module_set_property (GObject      *object,
 }
 
 static void
-mutter_module_get_property (GObject    *object,
-			    guint       prop_id,
-			    GValue     *value,
-			    GParamSpec *pspec)
+meta_module_get_property (GObject    *object,
+                          guint       prop_id,
+                          GValue     *value,
+                          GParamSpec *pspec)
 {
-  MutterModulePrivate *priv = MUTTER_MODULE (object)->priv;
+  MetaModulePrivate *priv = META_MODULE (object)->priv;
 
   switch (prop_id)
     {
@@ -164,18 +164,18 @@ mutter_module_get_property (GObject    *object,
 }
 
 static void
-mutter_module_class_init (MutterModuleClass *klass)
+meta_module_class_init (MetaModuleClass *klass)
 {
   GObjectClass     *gobject_class = G_OBJECT_CLASS (klass);
   GTypeModuleClass *gmodule_class = G_TYPE_MODULE_CLASS (klass);
 
-  gobject_class->finalize     = mutter_module_finalize;
-  gobject_class->dispose      = mutter_module_dispose;
-  gobject_class->set_property = mutter_module_set_property;
-  gobject_class->get_property = mutter_module_get_property;
+  gobject_class->finalize     = meta_module_finalize;
+  gobject_class->dispose      = meta_module_dispose;
+  gobject_class->set_property = meta_module_set_property;
+  gobject_class->get_property = meta_module_get_property;
 
-  gmodule_class->load         = mutter_module_load;
-  gmodule_class->unload       = mutter_module_unload;
+  gmodule_class->load         = meta_module_load;
+  gmodule_class->unload       = meta_module_unload;
 
   g_object_class_install_property (gobject_class,
 				   PROP_PATH,
@@ -186,22 +186,22 @@ mutter_module_class_init (MutterModuleClass *klass)
 							G_PARAM_READWRITE |
 						      G_PARAM_CONSTRUCT_ONLY));
 
-  g_type_class_add_private (gobject_class, sizeof (MutterModulePrivate));
+  g_type_class_add_private (gobject_class, sizeof (MetaModulePrivate));
 }
 
 static void
-mutter_module_init (MutterModule *self)
+meta_module_init (MetaModule *self)
 {
-  MutterModulePrivate *priv;
+  MetaModulePrivate *priv;
 
-  self->priv = priv = MUTTER_MODULE_GET_PRIVATE (self);
+  self->priv = priv = META_MODULE_GET_PRIVATE (self);
 
 }
 
 GType
-mutter_module_get_plugin_type (MutterModule *module)
+meta_module_get_plugin_type (MetaModule *module)
 {
-  MutterModulePrivate *priv = MUTTER_MODULE (module)->priv;
+  MetaModulePrivate *priv = META_MODULE (module)->priv;
 
   return priv->plugin_type;
 }

src/compositor/meta-module.h

@@ -21,37 +21,37 @@
  * 02111-1307, USA.
  */
 
-#ifndef MUTTER_MODULE_H_
-#define MUTTER_MODULE_H_
+#ifndef META_MODULE_H_
+#define META_MODULE_H_
 
 #include <glib-object.h>
 
-#define MUTTER_TYPE_MODULE            (mutter_module_get_type ())
-#define MUTTER_MODULE(obj)            (G_TYPE_CHECK_INSTANCE_CAST ((obj), MUTTER_TYPE_MODULE, MutterModule))
-#define MUTTER_MODULE_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST ((klass),  MUTTER_TYPE_MODULE, MutterModuleClass))
-#define MUTTER_IS_MODULE(obj)         (G_TYPE_CHECK_INSTANCE_TYPE ((obj), MUTTER_MODULE_TYPE))
-#define MUTTER_IS_MODULE_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass),  MUTTER_TYPE_MODULE))
-#define MUTTER_MODULE_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS ((obj),  MUTTER_TYPE_MODULE, MutterModuleClass))
+#define META_TYPE_MODULE            (meta_module_get_type ())
+#define META_MODULE(obj)            (G_TYPE_CHECK_INSTANCE_CAST ((obj), META_TYPE_MODULE, MetaModule))
+#define META_MODULE_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST ((klass),  META_TYPE_MODULE, MetaModuleClass))
+#define META_IS_MODULE(obj)         (G_TYPE_CHECK_INSTANCE_TYPE ((obj), META_MODULE_TYPE))
+#define META_IS_MODULE_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass),  META_TYPE_MODULE))
+#define META_MODULE_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS ((obj),  META_TYPE_MODULE, MetaModuleClass))
 
-typedef struct _MutterModule        MutterModule;
-typedef struct _MutterModuleClass   MutterModuleClass;
-typedef struct _MutterModulePrivate MutterModulePrivate;
+typedef struct _MetaModule        MetaModule;
+typedef struct _MetaModuleClass   MetaModuleClass;
+typedef struct _MetaModulePrivate MetaModulePrivate;
 
-struct _MutterModule
+struct _MetaModule
 {
   GTypeModule parent;
 
-  MutterModulePrivate *priv;
+  MetaModulePrivate *priv;
 };
 
-struct _MutterModuleClass
+struct _MetaModuleClass
 {
   GTypeModuleClass parent_class;
 };
 
 
-GType mutter_module_get_type (void);
+GType meta_module_get_type (void);
 
-GType mutter_module_get_plugin_type (MutterModule *module);
+GType meta_module_get_plugin_type (MetaModule *module);
 
 #endif

src/compositor/meta-plugin-manager.c

@@ -0,0 +1,484 @@
+/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
+
+/*
+ * Copyright (c) 2008 Intel Corp.
+ *
+ * Author: Tomas Frydrych <tf@linux.intel.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.
+ */
+
+#include "config.h"
+#include "compositor-private.h"
+#include "meta-plugin-manager.h"
+#include <meta/prefs.h>
+#include <meta/errors.h>
+#include <meta/workspace.h>
+#include "meta-module.h"
+#include "window-private.h"
+
+#include <string.h>
+#include <stdlib.h>
+
+#include <clutter/x11/clutter-x11.h>
+
+static GSList *plugin_types;
+
+/*
+ * We have one "default plugin manager" that acts for the first screen,
+ * but also can be used before we open any screens, and additional
+ * plugin managers for each screen. (This is ugly. Probably we should
+ * have one plugin manager and only make the plugins per-screen.)
+ */
+static MetaPluginManager *default_plugin_manager;
+
+struct MetaPluginManager
+{
+  MetaScreen   *screen;
+
+  GList /* MetaPlugin */ *plugins;  /* TODO -- maybe use hash table */
+};
+
+/*
+ * Loads the given plugin.
+ */
+void
+meta_plugin_manager_load (MetaPluginManager *plugin_mgr,
+                          const gchar       *plugin_name)
+{
+  const gchar *dpath = MUTTER_PLUGIN_DIR "/";
+  gchar       *path;
+  MetaModule  *module;
+  GType        plugin_type;
+
+  if (g_path_is_absolute (plugin_name))
+    path = g_strdup (plugin_name);
+  else
+    path = g_strconcat (dpath, plugin_name, ".so", NULL);
+
+  module = g_object_new (META_TYPE_MODULE, "path", path, NULL);
+  if (!module || !g_type_module_use (G_TYPE_MODULE (module)))
+    {
+      /* This is fatal under the assumption that a monitoring
+       * process like gnome-session will take over and handle
+       * our untimely exit.
+       */
+      g_printerr ("Unable to load plugin module [%s]: %s",
+                  path, g_module_error());
+      exit (1);
+    }
+
+  plugin_type = meta_module_get_plugin_type (module);
+  meta_plugin_manager_register (plugin_mgr, plugin_type);
+
+  g_type_module_unuse (G_TYPE_MODULE (module));
+  g_free (path);
+}
+
+/*
+ * Registers the given plugin type
+ */
+void
+meta_plugin_manager_register (MetaPluginManager *plugin_mgr,
+                              GType              plugin_type)
+{
+  MetaPlugin  *plugin;
+
+  plugin_types = g_slist_prepend (plugin_types, GSIZE_TO_POINTER (plugin_type));
+
+  plugin = g_object_new (plugin_type, NULL);
+  plugin_mgr->plugins = g_list_prepend (plugin_mgr->plugins, plugin);
+}
+
+void
+meta_plugin_manager_initialize (MetaPluginManager *plugin_mgr)
+{
+  GList *iter;
+
+  if (!plugin_mgr->plugins)
+    {
+      /*
+       * If no plugins are specified, load the default plugin.
+       */
+      meta_plugin_manager_load (plugin_mgr, "default");
+    }
+
+  for (iter = plugin_mgr->plugins; iter; iter = iter->next)
+    {
+      MetaPlugin *plugin = (MetaPlugin*) iter->data;
+      MetaPluginClass *klass = META_PLUGIN_GET_CLASS (plugin);
+
+      g_object_set (plugin,
+                    "screen", plugin_mgr->screen,
+                    NULL);
+
+      if (klass->start)
+        klass->start (plugin);
+    }
+}
+
+static MetaPluginManager *
+meta_plugin_manager_new (MetaScreen *screen)
+{
+  MetaPluginManager *plugin_mgr;
+
+  plugin_mgr = g_new0 (MetaPluginManager, 1);
+  plugin_mgr->screen = screen;
+
+  if (screen)
+    g_object_set_data (G_OBJECT (screen), "meta-plugin-manager", plugin_mgr);
+
+  return plugin_mgr;
+}
+
+MetaPluginManager *
+meta_plugin_manager_get_default (void)
+{
+  if (!default_plugin_manager)
+    {
+      default_plugin_manager = meta_plugin_manager_new (NULL);
+    }
+
+  return default_plugin_manager;
+}
+
+MetaPluginManager *
+meta_plugin_manager_get (MetaScreen *screen)
+{
+  MetaPluginManager *plugin_mgr;
+
+  plugin_mgr = g_object_get_data (G_OBJECT (screen), "meta-plugin-manager");
+  if (plugin_mgr)
+    return plugin_mgr;
+
+  if (!default_plugin_manager)
+    meta_plugin_manager_get_default ();
+
+  if (!default_plugin_manager->screen)
+    {
+      /* The default plugin manager is so far unused, we can recycle it */
+      default_plugin_manager->screen = screen;
+      g_object_set_data (G_OBJECT (screen), "meta-plugin-manager", default_plugin_manager);
+
+      return default_plugin_manager;
+    }
+  else
+    {
+      GSList *iter;
+      GType plugin_type;
+      MetaPlugin *plugin;
+
+      plugin_mgr = meta_plugin_manager_new (screen);
+
+      for (iter = plugin_types; iter; iter = iter->next)
+        {
+          plugin_type = (GType)GPOINTER_TO_SIZE (iter->data);
+          plugin = g_object_new (plugin_type, "screen", screen,  NULL);
+          plugin_mgr->plugins = g_list_prepend (plugin_mgr->plugins, plugin);
+        }
+
+      return plugin_mgr;
+    }
+}
+
+static void
+meta_plugin_manager_kill_window_effects (MetaPluginManager *plugin_mgr,
+                                         MetaWindowActor   *actor)
+{
+  GList *l = plugin_mgr->plugins;
+
+  while (l)
+    {
+      MetaPlugin        *plugin = l->data;
+      MetaPluginClass   *klass = META_PLUGIN_GET_CLASS (plugin);
+
+      if (!meta_plugin_disabled (plugin)
+	  && klass->kill_window_effects)
+        klass->kill_window_effects (plugin, actor);
+
+      l = l->next;
+    }
+}
+
+static void
+meta_plugin_manager_kill_switch_workspace (MetaPluginManager *plugin_mgr)
+{
+  GList *l = plugin_mgr->plugins;
+
+  while (l)
+    {
+      MetaPlugin        *plugin = l->data;
+      MetaPluginClass   *klass = META_PLUGIN_GET_CLASS (plugin);
+
+      if (!meta_plugin_disabled (plugin)
+          && (meta_plugin_features (plugin) & META_PLUGIN_SWITCH_WORKSPACE)
+	  && klass->kill_switch_workspace)
+        klass->kill_switch_workspace (plugin);
+
+      l = l->next;
+    }
+}
+
+/*
+ * Public method that the compositor hooks into for events that require
+ * no additional parameters.
+ *
+ * Returns TRUE if at least one of the plugins handled the event type (i.e.,
+ * if the return value is FALSE, there will be no subsequent call to the
+ * manager completed() callback, and the compositor must ensure that any
+ * appropriate post-effect cleanup is carried out.
+ */
+gboolean
+meta_plugin_manager_event_simple (MetaPluginManager *plugin_mgr,
+                                  MetaWindowActor   *actor,
+                                  unsigned long      event)
+{
+  GList *l = plugin_mgr->plugins;
+  gboolean retval = FALSE;
+  MetaDisplay *display  = meta_screen_get_display (plugin_mgr->screen);
+
+  if (display->display_opening)
+    return FALSE;
+
+  while (l)
+    {
+      MetaPlugin        *plugin = l->data;
+      MetaPluginClass   *klass = META_PLUGIN_GET_CLASS (plugin);
+
+      if (!meta_plugin_disabled (plugin) &&
+          (meta_plugin_features (plugin) & event))
+        {
+          retval = TRUE;
+
+          switch (event)
+            {
+            case META_PLUGIN_MINIMIZE:
+              if (klass->minimize)
+                {
+                  meta_plugin_manager_kill_window_effects (
+		      plugin_mgr,
+		      actor);
+
+                  _meta_plugin_effect_started (plugin);
+                  klass->minimize (plugin, actor);
+                }
+              break;
+            case META_PLUGIN_MAP:
+              if (klass->map)
+                {
+                  meta_plugin_manager_kill_window_effects (
+		      plugin_mgr,
+		      actor);
+
+                  _meta_plugin_effect_started (plugin);
+                  klass->map (plugin, actor);
+                }
+              break;
+            case META_PLUGIN_DESTROY:
+              if (klass->destroy)
+                {
+                  _meta_plugin_effect_started (plugin);
+                  klass->destroy (plugin, actor);
+                }
+              break;
+            default:
+              g_warning ("Incorrect handler called for event %lu", event);
+            }
+        }
+
+      l = l->next;
+    }
+
+  return retval;
+}
+
+/*
+ * The public method that the compositor hooks into for maximize and unmaximize
+ * events.
+ *
+ * Returns TRUE if at least one of the plugins handled the event type (i.e.,
+ * if the return value is FALSE, there will be no subsequent call to the
+ * manager completed() callback, and the compositor must ensure that any
+ * appropriate post-effect cleanup is carried out.
+ */
+gboolean
+meta_plugin_manager_event_maximize (MetaPluginManager *plugin_mgr,
+                                    MetaWindowActor   *actor,
+                                    unsigned long      event,
+                                    gint               target_x,
+                                    gint               target_y,
+                                    gint               target_width,
+                                    gint               target_height)
+{
+  GList *l = plugin_mgr->plugins;
+  gboolean retval = FALSE;
+  MetaDisplay *display  = meta_screen_get_display (plugin_mgr->screen);
+
+  if (display->display_opening)
+    return FALSE;
+
+  while (l)
+    {
+      MetaPlugin        *plugin = l->data;
+      MetaPluginClass   *klass = META_PLUGIN_GET_CLASS (plugin);
+
+      if (!meta_plugin_disabled (plugin) &&
+          (meta_plugin_features (plugin) & event))
+        {
+          retval = TRUE;
+
+          switch (event)
+            {
+            case META_PLUGIN_MAXIMIZE:
+              if (klass->maximize)
+                {
+                  meta_plugin_manager_kill_window_effects (
+		      plugin_mgr,
+		      actor);
+
+                  _meta_plugin_effect_started (plugin);
+                  klass->maximize (plugin, actor,
+                                   target_x, target_y,
+                                   target_width, target_height);
+                }
+              break;
+            case META_PLUGIN_UNMAXIMIZE:
+              if (klass->unmaximize)
+                {
+                  meta_plugin_manager_kill_window_effects (
+		      plugin_mgr,
+		      actor);
+
+                  _meta_plugin_effect_started (plugin);
+                  klass->unmaximize (plugin, actor,
+                                     target_x, target_y,
+                                     target_width, target_height);
+                }
+              break;
+            default:
+              g_warning ("Incorrect handler called for event %lu", event);
+            }
+        }
+
+      l = l->next;
+    }
+
+  return retval;
+}
+
+/*
+ * The public method that the compositor hooks into for desktop switching.
+ *
+ * Returns TRUE if at least one of the plugins handled the event type (i.e.,
+ * if the return value is FALSE, there will be no subsequent call to the
+ * manager completed() callback, and the compositor must ensure that any
+ * appropriate post-effect cleanup is carried out.
+ */
+gboolean
+meta_plugin_manager_switch_workspace (MetaPluginManager   *plugin_mgr,
+                                      gint                 from,
+                                      gint                 to,
+                                      MetaMotionDirection  direction)
+{
+  GList *l = plugin_mgr->plugins;
+  gboolean retval = FALSE;
+  MetaDisplay *display  = meta_screen_get_display (plugin_mgr->screen);
+
+  if (display->display_opening)
+    return FALSE;
+
+  while (l)
+    {
+      MetaPlugin        *plugin = l->data;
+      MetaPluginClass   *klass = META_PLUGIN_GET_CLASS (plugin);
+
+      if (!meta_plugin_disabled (plugin) &&
+          (meta_plugin_features (plugin) & META_PLUGIN_SWITCH_WORKSPACE))
+        {
+          if (klass->switch_workspace)
+            {
+              retval = TRUE;
+              meta_plugin_manager_kill_switch_workspace (plugin_mgr);
+
+              _meta_plugin_effect_started (plugin);
+              klass->switch_workspace (plugin, from, to, direction);
+            }
+        }
+
+      l = l->next;
+    }
+
+  return retval;
+}
+
+/*
+ * The public method that the compositor hooks into for desktop switching.
+ *
+ * Returns TRUE if at least one of the plugins handled the event type (i.e.,
+ * if the return value is FALSE, there will be no subsequent call to the
+ * manager completed() callback, and the compositor must ensure that any
+ * appropriate post-effect cleanup is carried out.
+ */
+gboolean
+meta_plugin_manager_xevent_filter (MetaPluginManager *plugin_mgr,
+                                   XEvent            *xev)
+{
+  GList *l;
+  gboolean have_plugin_xevent_func;
+
+  if (!plugin_mgr)
+    return FALSE;
+
+  l = plugin_mgr->plugins;
+
+  /* We need to make sure that clutter gets certain events, like
+   * ConfigureNotify on the stage window. If there is a plugin that
+   * provides an xevent_filter function, then it's the responsibility
+   * of that plugin to pass events to Clutter. Otherwise, we send the
+   * event directly to Clutter ourselves.
+   *
+   * What happens if there are two plugins with xevent_filter functions
+   * is undefined; in general, multiple competing plugins are something
+   * we don't support well or care much about.
+   *
+   * FIXME: Really, we should just always handle sending the event to
+   *  clutter if a plugin doesn't report the event as handled by
+   *  returning TRUE, but it doesn't seem worth breaking compatibility
+   *  of the plugin interface right now to achieve this; the way it is
+   *  now works fine in practice.
+   */
+  have_plugin_xevent_func = FALSE;
+
+  while (l)
+    {
+      MetaPlugin      *plugin = l->data;
+      MetaPluginClass *klass = META_PLUGIN_GET_CLASS (plugin);
+
+      if (klass->xevent_filter)
+        {
+          have_plugin_xevent_func = TRUE;
+          if (klass->xevent_filter (plugin, xev) == TRUE)
+            return TRUE;
+        }
+
+      l = l->next;
+    }
+
+  if (!have_plugin_xevent_func)
+    return clutter_x11_handle_event (xev) != CLUTTER_X11_FILTER_CONTINUE;
+
+  return FALSE;
+}

src/compositor/meta-plugin-manager.h

@@ -0,0 +1,82 @@
+/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
+
+/*
+ * Copyright (c) 2008 Intel Corp.
+ *
+ * Author: Tomas Frydrych <tf@linux.intel.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.
+ */
+
+#ifndef META_PLUGIN_MANAGER_H_
+#define META_PLUGIN_MANAGER_H_
+
+#include <meta/types.h>
+#include <meta/screen.h>
+
+#define  META_PLUGIN_FROM_MANAGER_
+#include <meta/meta-plugin.h>
+#undef   META_PLUGIN_FROM_MANAGER_
+
+#define META_PLUGIN_MINIMIZE         (1<<0)
+#define META_PLUGIN_MAXIMIZE         (1<<1)
+#define META_PLUGIN_UNMAXIMIZE       (1<<2)
+#define META_PLUGIN_MAP              (1<<3)
+#define META_PLUGIN_DESTROY          (1<<4)
+#define META_PLUGIN_SWITCH_WORKSPACE (1<<5)
+
+#define META_PLUGIN_ALL_EFFECTS      (~0)
+
+/**
+ * MetaPluginManager: (skip)
+ *
+ */
+typedef struct MetaPluginManager MetaPluginManager;
+
+MetaPluginManager * meta_plugin_manager_get         (MetaScreen *screen);
+MetaPluginManager * meta_plugin_manager_get_default (void);
+
+void     meta_plugin_manager_load         (MetaPluginManager *mgr,
+                                           const gchar       *plugin_name);
+void     meta_plugin_manager_register     (MetaPluginManager *mgr,
+                                           GType              plugin_type);
+void     meta_plugin_manager_initialize   (MetaPluginManager *mgr);
+
+gboolean meta_plugin_manager_event_simple (MetaPluginManager *mgr,
+                                           MetaWindowActor   *actor,
+                                           unsigned long      event);
+
+gboolean meta_plugin_manager_event_maximize    (MetaPluginManager *mgr,
+                                                MetaWindowActor   *actor,
+                                                unsigned long      event,
+                                                gint               target_x,
+                                                gint               target_y,
+                                                gint               target_width,
+                                                gint               target_height);
+void     meta_plugin_manager_update_workspaces (MetaPluginManager *mgr);
+
+void meta_plugin_manager_update_workspace (MetaPluginManager *mgr,
+                                           MetaWorkspace     *w);
+
+gboolean meta_plugin_manager_switch_workspace (MetaPluginManager   *mgr,
+                                               gint                 from,
+                                               gint                 to,
+                                               MetaMotionDirection  direction);
+
+gboolean meta_plugin_manager_xevent_filter (MetaPluginManager *mgr,
+                                            XEvent            *xev);
+
+#endif

src/compositor/meta-plugin.c

@@ -0,0 +1,566 @@
+/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
+
+/*
+ * Copyright (c) 2008 Intel Corp.
+ *
+ * Author: Tomas Frydrych <tf@linux.intel.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.
+ */
+
+#include <meta/meta-plugin.h>
+#include "meta-plugin-manager.h"
+#include <meta/screen.h>
+#include <meta/display.h>
+
+#include <string.h>
+#include <X11/Xlib.h>
+#include <X11/extensions/Xfixes.h>
+#include <X11/extensions/shape.h>
+#include <clutter/x11/clutter-x11.h>
+
+#include "compositor-private.h"
+#include "meta-window-actor-private.h"
+
+G_DEFINE_ABSTRACT_TYPE (MetaPlugin, meta_plugin, G_TYPE_OBJECT);
+
+#define META_PLUGIN_GET_PRIVATE(obj) \
+(G_TYPE_INSTANCE_GET_PRIVATE ((obj), META_TYPE_PLUGIN, MetaPluginPrivate))
+
+enum
+{
+  PROP_0,
+  PROP_SCREEN,
+  PROP_FEATURES,
+  PROP_DISABLED,
+  PROP_DEBUG_MODE,
+};
+
+struct _MetaPluginPrivate
+{
+  MetaScreen   *screen;
+  gulong        features;
+
+  gint          running;
+
+  gboolean      disabled : 1;
+  gboolean      debug    : 1;
+};
+
+static void
+meta_plugin_set_features (MetaPlugin *plugin)
+{
+  MetaPluginPrivate  *priv     = plugin->priv;
+  MetaPluginClass    *klass    = META_PLUGIN_GET_CLASS (plugin);
+
+  priv->features = 0;
+
+  /*
+   * Feature flags: identify events that the plugin can handle; a plugin can
+   * handle one or more events.
+   */
+  if (klass->minimize)
+    priv->features |= META_PLUGIN_MINIMIZE;
+
+  if (klass->maximize)
+    priv->features |= META_PLUGIN_MAXIMIZE;
+
+  if (klass->unmaximize)
+    priv->features |= META_PLUGIN_UNMAXIMIZE;
+
+  if (klass->map)
+    priv->features |= META_PLUGIN_MAP;
+
+  if (klass->destroy)
+    priv->features |= META_PLUGIN_DESTROY;
+
+  if (klass->switch_workspace)
+    priv->features |= META_PLUGIN_SWITCH_WORKSPACE;
+}
+
+static void
+meta_plugin_constructed (GObject *object)
+{
+  meta_plugin_set_features (META_PLUGIN (object));
+
+  if (G_OBJECT_CLASS (meta_plugin_parent_class)->constructed)
+      G_OBJECT_CLASS (meta_plugin_parent_class)->constructed (object);
+}
+
+static void
+meta_plugin_dispose (GObject *object)
+{
+  G_OBJECT_CLASS (meta_plugin_parent_class)->dispose (object);
+}
+
+static void
+meta_plugin_finalize (GObject *object)
+{
+  G_OBJECT_CLASS (meta_plugin_parent_class)->finalize (object);
+}
+
+static void
+meta_plugin_set_property (GObject      *object,
+                          guint         prop_id,
+                          const GValue *value,
+                          GParamSpec   *pspec)
+{
+  MetaPluginPrivate *priv = META_PLUGIN (object)->priv;
+
+  switch (prop_id)
+    {
+    case PROP_SCREEN:
+      priv->screen = g_value_get_object (value);
+      break;
+    case PROP_DISABLED:
+      priv->disabled = g_value_get_boolean (value);
+      break;
+    case PROP_DEBUG_MODE:
+      priv->debug = g_value_get_boolean (value);
+      break;
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+      break;
+    }
+}
+
+static void
+meta_plugin_get_property (GObject    *object,
+                          guint       prop_id,
+                          GValue     *value,
+                          GParamSpec *pspec)
+{
+  MetaPluginPrivate *priv = META_PLUGIN (object)->priv;
+
+  switch (prop_id)
+    {
+    case PROP_SCREEN:
+      g_value_set_object (value, priv->screen);
+      break;
+    case PROP_DISABLED:
+      g_value_set_boolean (value, priv->disabled);
+      break;
+    case PROP_DEBUG_MODE:
+      g_value_set_boolean (value, priv->debug);
+      break;
+    case PROP_FEATURES:
+      g_value_set_ulong (value, priv->features);
+      break;
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+      break;
+    }
+}
+
+
+static void
+meta_plugin_class_init (MetaPluginClass *klass)
+{
+  GObjectClass      *gobject_class = G_OBJECT_CLASS (klass);
+
+  gobject_class->constructed     = meta_plugin_constructed;
+  gobject_class->finalize        = meta_plugin_finalize;
+  gobject_class->dispose         = meta_plugin_dispose;
+  gobject_class->set_property    = meta_plugin_set_property;
+  gobject_class->get_property    = meta_plugin_get_property;
+
+  g_object_class_install_property (gobject_class,
+                                   PROP_SCREEN,
+                                   g_param_spec_object ("screen",
+                                                        "MetaScreen",
+                                                        "MetaScreen",
+                                                        META_TYPE_SCREEN,
+                                                        G_PARAM_READWRITE));
+
+  g_object_class_install_property (gobject_class,
+				   PROP_FEATURES,
+				   g_param_spec_ulong ("features",
+                                                       "Features",
+                                                       "Plugin Features",
+                                                       0 , G_MAXULONG, 0,
+                                                       G_PARAM_READABLE));
+
+  g_object_class_install_property (gobject_class,
+				   PROP_DISABLED,
+				   g_param_spec_boolean ("disabled",
+                                                      "Plugin disabled",
+                                                      "Plugin disabled",
+                                                      FALSE,
+                                                      G_PARAM_READWRITE));
+
+  g_object_class_install_property (gobject_class,
+				   PROP_DEBUG_MODE,
+				   g_param_spec_boolean ("debug-mode",
+                                                      "Debug Mode",
+                                                      "Debug Mode",
+                                                      FALSE,
+                                                      G_PARAM_READABLE));
+
+  g_type_class_add_private (gobject_class, sizeof (MetaPluginPrivate));
+}
+
+static void
+meta_plugin_init (MetaPlugin *self)
+{
+  MetaPluginPrivate *priv;
+
+  self->priv = priv = META_PLUGIN_GET_PRIVATE (self);
+}
+
+gulong
+meta_plugin_features (MetaPlugin *plugin)
+{
+  MetaPluginPrivate *priv = META_PLUGIN (plugin)->priv;
+
+  return priv->features;
+}
+
+gboolean
+meta_plugin_disabled (MetaPlugin *plugin)
+{
+  MetaPluginPrivate *priv = META_PLUGIN (plugin)->priv;
+
+  return priv->disabled;
+}
+
+gboolean
+meta_plugin_running  (MetaPlugin *plugin)
+{
+  MetaPluginPrivate *priv = META_PLUGIN (plugin)->priv;
+
+  return (priv->running > 0);
+}
+
+gboolean
+meta_plugin_debug_mode (MetaPlugin *plugin)
+{
+  MetaPluginPrivate *priv = META_PLUGIN (plugin)->priv;
+
+  return priv->debug;
+}
+
+const MetaPluginInfo *
+meta_plugin_get_info (MetaPlugin *plugin)
+{
+  MetaPluginClass  *klass = META_PLUGIN_GET_CLASS (plugin);
+
+  if (klass && klass->plugin_info)
+    return klass->plugin_info (plugin);
+
+  return NULL;
+}
+
+ClutterActor *
+meta_plugin_get_overlay_group (MetaPlugin *plugin)
+{
+  MetaPluginPrivate *priv = META_PLUGIN (plugin)->priv;
+
+  return meta_get_overlay_group_for_screen (priv->screen);
+}
+
+ClutterActor *
+meta_plugin_get_stage (MetaPlugin *plugin)
+{
+  MetaPluginPrivate *priv = META_PLUGIN (plugin)->priv;
+
+  return meta_get_stage_for_screen (priv->screen);
+}
+
+ClutterActor *
+meta_plugin_get_window_group (MetaPlugin *plugin)
+{
+  MetaPluginPrivate *priv = META_PLUGIN (plugin)->priv;
+
+  return meta_get_window_group_for_screen (priv->screen);
+}
+
+ClutterActor *
+meta_plugin_get_background_actor (MetaPlugin *plugin)
+{
+  MetaPluginPrivate *priv = META_PLUGIN (plugin)->priv;
+
+  return meta_get_background_actor_for_screen (priv->screen);
+}
+
+/**
+ * _meta_plugin_effect_started:
+ * @plugin: the plugin
+ *
+ * Mark that an effect has started for the plugin. This is called
+ * internally by MetaPluginManager.
+ */
+void
+_meta_plugin_effect_started (MetaPlugin *plugin)
+{
+  MetaPluginPrivate *priv = META_PLUGIN (plugin)->priv;
+
+  priv->running++;
+}
+
+void
+meta_plugin_switch_workspace_completed (MetaPlugin *plugin)
+{
+  MetaPluginPrivate *priv = META_PLUGIN (plugin)->priv;
+
+  MetaScreen *screen = meta_plugin_get_screen (plugin);
+
+  if (priv->running-- < 0)
+    {
+      g_warning ("Error in running effect accounting, adjusting.");
+      priv->running = 0;
+    }
+
+  meta_switch_workspace_completed (screen);
+}
+
+static void
+meta_plugin_window_effect_completed (MetaPlugin      *plugin,
+                                     MetaWindowActor *actor,
+                                     unsigned long    event)
+{
+  MetaPluginPrivate *priv = META_PLUGIN (plugin)->priv;
+
+  if (priv->running-- < 0)
+    {
+      g_warning ("Error in running effect accounting, adjusting.");
+      priv->running = 0;
+    }
+
+  if (!actor)
+    {
+      const MetaPluginInfo *info;
+      const gchar            *name = NULL;
+
+      if (plugin && (info = meta_plugin_get_info (plugin)))
+        name = info->name;
+
+      g_warning ("Plugin [%s] passed NULL for actor!",
+                 name ? name : "unknown");
+    }
+
+  meta_window_actor_effect_completed (actor, event);
+}
+
+void
+meta_plugin_minimize_completed (MetaPlugin      *plugin,
+                                MetaWindowActor *actor)
+{
+  meta_plugin_window_effect_completed (plugin, actor, META_PLUGIN_MINIMIZE);
+}
+
+void
+meta_plugin_maximize_completed (MetaPlugin      *plugin,
+                                MetaWindowActor *actor)
+{
+  meta_plugin_window_effect_completed (plugin, actor, META_PLUGIN_MAXIMIZE);
+}
+
+void
+meta_plugin_unmaximize_completed (MetaPlugin      *plugin,
+                                  MetaWindowActor *actor)
+{
+  meta_plugin_window_effect_completed (plugin, actor, META_PLUGIN_UNMAXIMIZE);
+}
+
+void
+meta_plugin_map_completed (MetaPlugin      *plugin,
+                           MetaWindowActor *actor)
+{
+  meta_plugin_window_effect_completed (plugin, actor, META_PLUGIN_MAP);
+}
+
+void
+meta_plugin_destroy_completed (MetaPlugin      *plugin,
+                               MetaWindowActor *actor)
+{
+  meta_plugin_window_effect_completed (plugin, actor, META_PLUGIN_DESTROY);
+}
+
+void
+meta_plugin_query_screen_size (MetaPlugin *plugin,
+                               int        *width,
+                               int        *height)
+{
+  MetaPluginPrivate *priv = META_PLUGIN (plugin)->priv;
+
+  meta_screen_get_size (priv->screen, width, height);
+}
+
+void
+meta_plugin_set_stage_reactive (MetaPlugin *plugin,
+                                gboolean    reactive)
+{
+  MetaPluginPrivate *priv = META_PLUGIN (plugin)->priv;
+  MetaScreen  *screen  = priv->screen;
+
+  if (reactive)
+    meta_set_stage_input_region (screen, None);
+  else
+    meta_empty_stage_input_region (screen);
+}
+
+void
+meta_plugin_set_stage_input_area (MetaPlugin *plugin,
+                                  gint x, gint y, gint width, gint height)
+{
+  MetaPluginPrivate *priv = META_PLUGIN (plugin)->priv;
+  MetaScreen   *screen  = priv->screen;
+  MetaDisplay  *display = meta_screen_get_display (screen);
+  Display      *xdpy    = meta_display_get_xdisplay (display);
+  XRectangle    rect;
+  XserverRegion region;
+
+  rect.x = x;
+  rect.y = y;
+  rect.width = width;
+  rect.height = height;
+
+  region = XFixesCreateRegion (xdpy, &rect, 1);
+  meta_set_stage_input_region (screen, region);
+  XFixesDestroyRegion (xdpy, region);
+}
+
+void
+meta_plugin_set_stage_input_region (MetaPlugin   *plugin,
+                                    XserverRegion region)
+{
+  MetaPluginPrivate *priv = META_PLUGIN (plugin)->priv;
+  MetaScreen  *screen  = priv->screen;
+
+  meta_set_stage_input_region (screen, region);
+}
+
+/**
+ * meta_plugin_get_window_actors:
+ * @plugin: A #MetaPlugin
+ *
+ * This function returns all of the #MetaWindowActor objects referenced by Mutter, including
+ * override-redirect windows.  The returned list is a snapshot of Mutter's current
+ * stacking order, with the topmost window last.
+ *
+ * The 'restacked' signal of #MetaScreen signals when this value has changed.
+ *
+ * Returns: (transfer none) (element-type MetaWindowActor): Windows in stacking order, topmost last
+ */
+GList *
+meta_plugin_get_window_actors (MetaPlugin *plugin)
+{
+  MetaPluginPrivate *priv = META_PLUGIN (plugin)->priv;
+
+  return meta_get_window_actors (priv->screen);
+}
+
+/**
+ * meta_plugin_begin_modal:
+ * @plugin: a #MetaPlugin
+ * @grab_window: the X window to grab the keyboard and mouse on
+ * @cursor: the cursor to use for the pointer grab, or None,
+ *          to use the normal cursor for the grab window and
+ *          its descendants.
+ * @options: flags that modify the behavior of the modal grab
+ * @timestamp: the timestamp used for establishing grabs
+ *
+ * This function is used to grab the keyboard and mouse for the exclusive
+ * use of the plugin. Correct operation requires that both the keyboard
+ * and mouse are grabbed, or thing will break. (In particular, other
+ * passive X grabs in Meta can trigger but not be handled by the normal
+ * keybinding handling code.) However, the plugin can establish the keyboard
+ * and/or mouse grabs ahead of time and pass in the
+ * %META_MODAL_POINTER_ALREADY_GRABBED and/or %META_MODAL_KEYBOARD_ALREADY_GRABBED
+ * options. This facility is provided for two reasons: first to allow using
+ * this function to establish modality after a passive grab, and second to
+ * allow using obscure features of XGrabPointer() and XGrabKeyboard() without
+ * having to add them to this API.
+ *
+ * Return value: whether we successfully grabbed the keyboard and
+ *  mouse and made the plugin modal.
+ */
+gboolean
+meta_plugin_begin_modal (MetaPlugin       *plugin,
+                         Window            grab_window,
+                         Cursor            cursor,
+                         MetaModalOptions  options,
+                         guint32           timestamp)
+{
+  MetaPluginPrivate *priv = META_PLUGIN (plugin)->priv;
+
+  return meta_begin_modal_for_plugin (priv->screen, plugin,
+                                      grab_window, cursor, options, timestamp);
+}
+
+/**
+ * meta_plugin_end_modal
+ * @plugin: a #MetaPlugin
+ * @timestamp: the time used for releasing grabs
+ *
+ * Ends the modal operation begun with meta_plugin_begin_modal(). This
+ * ungrabs both the mouse and keyboard even when
+ * %META_MODAL_POINTER_ALREADY_GRABBED or
+ * %META_MODAL_KEYBOARD_ALREADY_GRABBED were provided as options
+ * when beginnning the modal operation.
+ */
+void
+meta_plugin_end_modal (MetaPlugin *plugin,
+                       guint32     timestamp)
+{
+  MetaPluginPrivate *priv = META_PLUGIN (plugin)->priv;
+
+  meta_end_modal_for_plugin (priv->screen, plugin, timestamp);
+}
+
+Display *
+meta_plugin_get_xdisplay (MetaPlugin *plugin)
+{
+  MetaPluginPrivate *priv    = META_PLUGIN (plugin)->priv;
+  MetaDisplay       *display = meta_screen_get_display (priv->screen);
+  Display           *xdpy    = meta_display_get_xdisplay (display);
+
+  return xdpy;
+}
+
+/**
+ * meta_plugin_get_screen:
+ * @plugin: a #MetaPlugin
+ *
+ * Gets the #MetaScreen corresponding to a plugin. Each plugin instance
+ * is associated with exactly one screen; if Metacity is managing
+ * multiple screens, multiple plugin instances will be created.
+ *
+ * Return value: (transfer none): the #MetaScreen for the plugin
+ */
+MetaScreen *
+meta_plugin_get_screen (MetaPlugin *plugin)
+{
+  MetaPluginPrivate *priv = META_PLUGIN (plugin)->priv;
+
+  return priv->screen;
+}
+
+/**
+ * meta_plugin_type_register:
+ * @plugin_type: a #MetaPlugin type
+ *
+ * Register @plugin_type as a compositor plugin type to be used.
+ * You must call this before calling meta_init().
+ */
+void
+meta_plugin_type_register (GType plugin_type)
+{
+  MetaPluginManager *plugin_manager;
+
+  plugin_manager = meta_plugin_manager_get_default ();
+  meta_plugin_manager_register (plugin_manager, plugin_type);
+}

src/compositor/meta-shadow-factory-private.h

@@ -0,0 +1,67 @@
+/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
+/*
+ * MetaShadowFactory:
+ *
+ * Create and cache shadow textures for arbitrary window shapes
+ *
+ * Copyright (C) 2010 Red Hat, Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.
+ */
+
+#ifndef __META_SHADOW_FACTORY_PRIVATE_H__
+#define __META_SHADOW_FACTORY_PRIVATE_H__
+
+#include <cairo.h>
+#include <clutter/clutter.h>
+#include "meta-window-shape.h"
+#include <meta/meta-shadow-factory.h>
+
+/**
+ * MetaShadow:
+ * #MetaShadow holds a shadow texture along with information about how to
+ * apply that texture to draw a window texture. (E.g., it knows how big the
+ * unscaled borders are on each side of the shadow texture.)
+ */
+typedef struct _MetaShadow MetaShadow;
+
+MetaShadow *meta_shadow_ref         (MetaShadow            *shadow);
+void        meta_shadow_unref       (MetaShadow            *shadow);
+CoglHandle  meta_shadow_get_texture (MetaShadow            *shadow);
+void        meta_shadow_paint       (MetaShadow            *shadow,
+                                     int                    window_x,
+                                     int                    window_y,
+                                     int                    window_width,
+                                     int                    window_height,
+                                     guint8                 opacity,
+                                     cairo_region_t        *clip);
+void        meta_shadow_get_bounds  (MetaShadow            *shadow,
+                                     int                    window_x,
+                                     int                    window_y,
+                                     int                    window_width,
+                                     int                    window_height,
+                                     cairo_rectangle_int_t *bounds);
+
+MetaShadowFactory *meta_shadow_factory_new (void);
+
+MetaShadow *meta_shadow_factory_get_shadow (MetaShadowFactory *factory,
+                                            MetaWindowShape   *shape,
+                                            int                width,
+                                            int                height,
+                                            const char        *class_name,
+                                            gboolean           focused);
+
+#endif /* __META_SHADOW_FACTORY_PRIVATE_H__ */

src/compositor/meta-shadow-factory.c

@@ -0,0 +1,989 @@
+/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
+/*
+ * MetaShadowFactory:
+ *
+ * Create and cache shadow textures for abritrary window shapes
+ *
+ * Copyright 2010 Red Hat, Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.
+ */
+#include <config.h>
+#include <math.h>
+#include <string.h>
+
+#include "cogl-utils.h"
+#include "meta-shadow-factory-private.h"
+#include "region-utils.h"
+
+/* This file implements blurring the shape of a window to produce a
+ * shadow texture. The details are discussed below; a quick summary
+ * of the optimizations we use:
+ *
+ * - If the window shape is along the lines of a rounded rectangle -
+ *   a rectangular center portion with stuff at the corners - then
+ *   the blur of this - the shadow - can also be represented as a
+ *   9-sliced texture and the same texture can be used for different
+ *   size.
+ *
+ * - We use the fact that a Gaussian blur is separable to do a
+ *   2D blur as 1D blur of the rows followed by a 1D blur of the
+ *   columns.
+ *
+ * - For better cache efficiency, we blur rows, transpose the image
+ *   in blocks, blur rows again, and then transpose back.
+ *
+ * - We approximate the 1D gaussian blur as 3 successive box filters.
+ */
+
+typedef struct _MetaShadowCacheKey  MetaShadowCacheKey;
+typedef struct _MetaShadowClassInfo MetaShadowClassInfo;
+
+struct _MetaShadowCacheKey
+{
+  MetaWindowShape *shape;
+  int radius;
+  int top_fade;
+};
+
+struct _MetaShadow
+{
+  int ref_count;
+
+  MetaShadowFactory *factory;
+  MetaShadowCacheKey key;
+  CoglHandle texture;
+  CoglHandle material;
+
+  /* The outer order is the distance the shadow extends outside the window
+   * shape; the inner border is the unscaled portion inside the window
+   * shape */
+  int outer_border_top;
+  int inner_border_top;
+  int outer_border_right;
+  int inner_border_right;
+  int outer_border_bottom;
+  int inner_border_bottom;
+  int outer_border_left;
+  int inner_border_left;
+
+  guint scale_width : 1;
+  guint scale_height : 1;
+};
+
+struct _MetaShadowClassInfo
+{
+  const char *name; /* const so we can reuse for static definitions */
+  MetaShadowParams focused;
+  MetaShadowParams unfocused;
+};
+
+struct _MetaShadowFactory
+{
+  GObject parent_instance;
+
+  /* MetaShadowCacheKey => MetaShadow; the shadows are not referenced
+   * by the factory, they are simply removed from the table when freed */
+  GHashTable *shadows;
+
+  /* class name => MetaShadowClassInfo */
+  GHashTable *shadow_classes;
+};
+
+struct _MetaShadowFactoryClass
+{
+  GObjectClass parent_class;
+};
+
+enum
+{
+  CHANGED,
+
+  LAST_SIGNAL
+};
+
+static guint signals[LAST_SIGNAL] = { 0 };
+
+/* The first element in this array also defines the default parameters
+ * for newly created classes */
+MetaShadowClassInfo default_shadow_classes[] = {
+  { "normal",       { 12, -1, 0, 8, 255 }, { 6, -1, 0, 4, 255 } },
+  { "dialog",       { 12, -1, 0, 8, 255 }, { 6, -1, 0, 4, 255 } },
+  { "modal_dialog", { 12, -1, 0, 8, 255 }, { 6, -1, 0, 4, 255 } },
+  { "utility",      { 12, -1, 0, 8, 255 }, { 6, -1, 0, 4, 255 } },
+  { "border",       { 12, -1, 0, 8, 255 }, { 6, -1, 0, 4, 255 } },
+  { "menu",         { 12, -1, 0, 8, 255 }, { 6, -1, 0, 4, 255 } },
+
+  { "popup-menu",    { 6, -1, 0, 4, 255 }, { 6, -1, 0, 4, 255 } },
+
+  { "dropdown-menu", { 6, 25, 0, 4, 255 }, { 6, 100, 0, 4, 255 } },
+  { "attached",      { 6, 25, 0, 4, 255 }, { 6, 100, 0, 4, 255 } }
+};
+
+G_DEFINE_TYPE (MetaShadowFactory, meta_shadow_factory, G_TYPE_OBJECT);
+
+static guint
+meta_shadow_cache_key_hash (gconstpointer val)
+{
+  const MetaShadowCacheKey *key = val;
+
+  return 59 * key->radius + 67 * key->top_fade + 73 * meta_window_shape_hash (key->shape);
+}
+
+static gboolean
+meta_shadow_cache_key_equal (gconstpointer a,
+                             gconstpointer b)
+{
+  const MetaShadowCacheKey *key_a = a;
+  const MetaShadowCacheKey *key_b = b;
+
+  return (key_a->radius == key_b->radius && key_a->top_fade == key_b->top_fade &&
+          meta_window_shape_equal (key_a->shape, key_b->shape));
+}
+
+MetaShadow *
+meta_shadow_ref (MetaShadow *shadow)
+{
+  shadow->ref_count++;
+
+  return shadow;
+}
+
+void
+meta_shadow_unref (MetaShadow *shadow)
+{
+  shadow->ref_count--;
+  if (shadow->ref_count == 0)
+    {
+      if (shadow->factory)
+        {
+          g_hash_table_remove (shadow->factory->shadows,
+                               &shadow->key);
+        }
+
+      meta_window_shape_unref (shadow->key.shape);
+      cogl_handle_unref (shadow->texture);
+      cogl_handle_unref (shadow->material);
+
+      g_slice_free (MetaShadow, shadow);
+    }
+}
+
+/**
+ * meta_shadow_paint:
+ * @window_x: x position of the region to paint a shadow for
+ * @window_y: y position of the region to paint a shadow for
+ * @window_width: actual width of the region to paint a shadow for
+ * @window_height: actual height of the region to paint a shadow for
+ * @clip: (allow-none): if non-%NULL specifies the visible portion
+ *   of the shadow. Drawing won't be strictly clipped to this region
+ *   but it will be used to optimize what is drawn.
+ *
+ * Paints the shadow at the given position, for the specified actual
+ * size of the region. (Since a #MetaShadow can be shared between
+ * different sizes with the same extracted #MetaWindowShape the
+ * size needs to be passed in here.)
+ */
+void
+meta_shadow_paint (MetaShadow     *shadow,
+                   int             window_x,
+                   int             window_y,
+                   int             window_width,
+                   int             window_height,
+                   guint8          opacity,
+                   cairo_region_t *clip)
+{
+  float texture_width = cogl_texture_get_width (shadow->texture);
+  float texture_height = cogl_texture_get_height (shadow->texture);
+  int i, j;
+  float src_x[4];
+  float src_y[4];
+  int dest_x[4];
+  int dest_y[4];
+  int n_x, n_y;
+
+  cogl_material_set_color4ub (shadow->material,
+                              opacity, opacity, opacity, opacity);
+
+  cogl_set_source (shadow->material);
+
+  if (shadow->scale_width)
+    {
+      n_x = 3;
+
+      src_x[0] = 0.0;
+      src_x[1] = (shadow->inner_border_left + shadow->outer_border_left) / texture_width;
+      src_x[2] = (texture_width - (shadow->inner_border_right + shadow->outer_border_right)) / texture_width;
+      src_x[3] = 1.0;
+
+      dest_x[0] = window_x - shadow->outer_border_left;
+      dest_x[1] = window_x + shadow->inner_border_left;
+      dest_x[2] = window_x + window_width - shadow->inner_border_right;
+      dest_x[3] = window_x + window_width + shadow->outer_border_right;
+    }
+  else
+    {
+      n_x = 1;
+
+      src_x[0] = 0.0;
+      src_x[1] = 1.0;
+
+      dest_x[0] = window_x - shadow->outer_border_left;
+      dest_x[1] = window_x + window_width + shadow->outer_border_right;
+    }
+
+  if (shadow->scale_height)
+    {
+      n_y = 3;
+
+      src_y[0] = 0.0;
+      src_y[1] = (shadow->inner_border_top + shadow->outer_border_top) / texture_height;
+      src_y[2] = (texture_height - (shadow->inner_border_bottom + shadow->outer_border_bottom)) / texture_height;
+      src_y[3] = 1.0;
+
+      dest_y[0] = window_y - shadow->outer_border_top;
+      dest_y[1] = window_y + shadow->inner_border_top;
+      dest_y[2] = window_y + window_height - shadow->inner_border_bottom;
+      dest_y[3] = window_y + window_height + shadow->outer_border_bottom;
+    }
+  else
+    {
+      n_y = 1;
+
+      src_y[0] = 0.0;
+      src_y[1] = 1.0;
+
+      dest_y[0] = window_y - shadow->outer_border_top;
+      dest_y[1] = window_y + window_height + shadow->outer_border_bottom;
+    }
+
+  for (j = 0; j < n_y; j++)
+    {
+      cairo_rectangle_int_t dest_rect;
+      dest_rect.y = dest_y[j];
+      dest_rect.height = dest_y[j + 1] - dest_y[j];
+
+      for (i = 0; i < n_x; i++)
+        {
+          cairo_region_overlap_t overlap;
+
+          dest_rect.x = dest_x[i];
+          dest_rect.width = dest_x[i + 1] - dest_x[i];
+
+          if (clip)
+            overlap = cairo_region_contains_rectangle (clip, &dest_rect);
+          else
+            overlap = CAIRO_REGION_OVERLAP_PART;
+
+          if (overlap != CAIRO_REGION_OVERLAP_OUT)
+            cogl_rectangle_with_texture_coords (dest_x[i], dest_y[j],
+                                                dest_x[i + 1], dest_y[j + 1],
+                                                src_x[i], src_y[j],
+                                                src_x[i + 1], src_y[j + 1]);
+        }
+    }
+}
+
+/**
+ * meta_shadow_get_bounds:
+ * @shadow: a #MetaShadow
+ * @window_x: x position of the region to paint a shadow for
+ * @window_y: y position of the region to paint a shadow for
+ * @window_width: actual width of the region to paint a shadow for
+ * @window_height: actual height of the region to paint a shadow for
+ *
+ * Computes the bounds of the pixels that will be affected by
+ * meta_shadow_paints()
+ */
+void
+meta_shadow_get_bounds  (MetaShadow            *shadow,
+                         int                    window_x,
+                         int                    window_y,
+                         int                    window_width,
+                         int                    window_height,
+                         cairo_rectangle_int_t *bounds)
+{
+  bounds->x = window_x - shadow->outer_border_left;
+  bounds->y = window_x - shadow->outer_border_top;
+  bounds->width = window_width + shadow->outer_border_left + shadow->outer_border_right;
+  bounds->height = window_height + shadow->outer_border_top + shadow->outer_border_bottom;
+}
+
+static void
+meta_shadow_class_info_free (MetaShadowClassInfo *class_info)
+{
+  g_free ((char *)class_info->name);
+  g_slice_free (MetaShadowClassInfo, class_info);
+}
+
+static void
+meta_shadow_factory_init (MetaShadowFactory *factory)
+{
+  guint i;
+
+  factory->shadows = g_hash_table_new (meta_shadow_cache_key_hash,
+                                       meta_shadow_cache_key_equal);
+
+  factory->shadow_classes = g_hash_table_new_full (g_str_hash,
+                                                   g_str_equal,
+                                                   NULL,
+                                                   (GDestroyNotify)meta_shadow_class_info_free);
+
+  for (i = 0; i < G_N_ELEMENTS (default_shadow_classes); i++)
+    {
+      MetaShadowClassInfo *class_info = g_slice_new (MetaShadowClassInfo);
+
+      *class_info = default_shadow_classes[i];
+      class_info->name = g_strdup (class_info->name);
+
+      g_hash_table_insert (factory->shadow_classes,
+                           (char *)class_info->name, class_info);
+    }
+}
+
+static void
+meta_shadow_factory_finalize (GObject *object)
+{
+  MetaShadowFactory *factory = META_SHADOW_FACTORY (object);
+  GHashTableIter iter;
+  gpointer key, value;
+
+  /* Detach from the shadows in the table so we won't try to
+   * remove them when they're freed. */
+  g_hash_table_iter_init (&iter, factory->shadows);
+  while (g_hash_table_iter_next (&iter, &key, &value))
+    {
+      MetaShadow *shadow = key;
+      shadow->factory = NULL;
+    }
+
+  g_hash_table_destroy (factory->shadows);
+  g_hash_table_destroy (factory->shadow_classes);
+
+  G_OBJECT_CLASS (meta_shadow_factory_parent_class)->finalize (object);
+}
+
+static void
+meta_shadow_factory_class_init (MetaShadowFactoryClass *klass)
+{
+  GObjectClass *object_class = G_OBJECT_CLASS (klass);
+
+  object_class->finalize = meta_shadow_factory_finalize;
+
+  signals[CHANGED] =
+    g_signal_new ("changed",
+                  G_TYPE_FROM_CLASS (object_class),
+                  G_SIGNAL_RUN_LAST,
+                  0,
+                  NULL, NULL,
+                  g_cclosure_marshal_VOID__VOID,
+                  G_TYPE_NONE, 0);
+}
+
+MetaShadowFactory *
+meta_shadow_factory_new (void)
+{
+  return g_object_new (META_TYPE_SHADOW_FACTORY, NULL);
+}
+
+/**
+ * meta_shadow_factory_get_default:
+ *
+ * Return value: (transfer none): the global singleton shadow factory
+ */
+MetaShadowFactory *
+meta_shadow_factory_get_default (void)
+{
+  static MetaShadowFactory *factory;
+
+  if (factory == NULL)
+    factory = meta_shadow_factory_new ();
+
+  return factory;
+}
+
+/* We emulate a 1D Gaussian blur by using 3 consecutive box blurs;
+ * this produces a result that's within 3% of the original and can be
+ * implemented much faster for large filter sizes because of the
+ * efficiency of implementation of a box blur. Idea and formula
+ * for choosing the box blur size come from:
+ *
+ * http://www.w3.org/TR/SVG/filters.html#feGaussianBlurElement
+ *
+ * The 2D blur is then done by blurring the rows, flipping the
+ * image and blurring the columns. (This is possible because the
+ * Gaussian kernel is separable - it's the product of a horizontal
+ * blur and a vertical blur.)
+ */
+static int
+get_box_filter_size (int radius)
+{
+  return (int)(0.5 + radius * (0.75 * sqrt(2*M_PI)));
+}
+
+/* The "spread" of the filter is the number of pixels from an original
+ * pixel that it's blurred image extends. (A no-op blur that doesn't
+ * blur would have a spread of 0.) See comment in blur_rows() for why the
+ * odd and even cases are different
+ */
+static int
+get_shadow_spread (int radius)
+{
+  int d = get_box_filter_size (radius);
+
+  if (d % 2 == 1)
+    return 3 * (d / 2);
+  else
+    return 3 * (d / 2) - 1;
+}
+
+/* This applies a single box blur pass to a horizontal range of pixels;
+ * since the box blur has the same weight for all pixels, we can
+ * implement an efficient sliding window algorithm where we add
+ * in pixels coming into the window from the right and remove
+ * them when they leave the windw to the left.
+ *
+ * d is the filter width; for even d shift indicates how the blurred
+ * result is aligned with the original - does ' x ' go to ' yy' (shift=1)
+ * or 'yy ' (shift=-1)
+ */
+static void
+blur_xspan (guchar *row,
+            guchar *tmp_buffer,
+            int     row_width,
+            int     x0,
+            int     x1,
+            int     d,
+            int     shift)
+{
+  int offset;
+  int sum = 0;
+  int i;
+
+  if (d % 2 == 1)
+    offset = d / 2;
+  else
+    offset = (d - shift) / 2;
+
+  /* All the conditionals in here look slow, but the branches will
+   * be well predicted and there are enough different possibilities
+   * that trying to write this as a series of unconditional loops
+   * is hard and not an obvious win. The main slow down here seems
+   * to be the integer division for pixel; one possible optimization
+   * would be to accumulate into two 16-bit integer buffers and
+   * only divide down after all three passes. (SSE parallel implementation
+   * of the divide step is possible.)
+   */
+  for (i = x0 - d + offset; i < x1 + offset; i++)
+    {
+      if (i >= 0 && i < row_width)
+	sum += row[i];
+
+      if (i >= x0 + offset)
+	{
+	  if (i >= d)
+	    sum -= row[i - d];
+
+	  tmp_buffer[i - offset] = (sum + d / 2) / d;
+	}
+    }
+
+  memcpy(row + x0, tmp_buffer + x0, x1 - x0);
+}
+
+static void
+blur_rows (cairo_region_t   *convolve_region,
+           int               x_offset,
+           int               y_offset,
+	   guchar           *buffer,
+	   int               buffer_width,
+	   int               buffer_height,
+           int               d)
+{
+  int i, j;
+  int n_rectangles;
+  guchar *tmp_buffer;
+
+  tmp_buffer = g_malloc (buffer_width);
+
+  n_rectangles = cairo_region_num_rectangles (convolve_region);
+  for (i = 0; i < n_rectangles; i++)
+    {
+      cairo_rectangle_int_t rect;
+
+      cairo_region_get_rectangle (convolve_region, i, &rect);
+
+      for (j = y_offset + rect.y; j < y_offset + rect.y + rect.height; j++)
+	{
+	  guchar *row = buffer + j * buffer_width;
+	  int x0 = x_offset + rect.x;
+	  int x1 = x0 + rect.width;
+
+          /* We want to produce a symmetric blur that spreads a pixel
+           * equally far to the left and right. If d is odd that happens
+           * naturally, but for d even, we approximate by using a blur
+           * on either side and then a centered blur of size d + 1.
+           * (techique also from the SVG specification)
+           */
+	  if (d % 2 == 1)
+	    {
+	      blur_xspan (row, tmp_buffer, buffer_width, x0, x1, d, 0);
+	      blur_xspan (row, tmp_buffer, buffer_width, x0, x1, d, 0);
+	      blur_xspan (row, tmp_buffer, buffer_width, x0, x1, d, 0);
+	    }
+	  else
+	    {
+	      blur_xspan (row, tmp_buffer, buffer_width, x0, x1, d, 1);
+	      blur_xspan (row, tmp_buffer, buffer_width, x0, x1, d, -1);
+	      blur_xspan (row, tmp_buffer, buffer_width, x0, x1, d + 1, 0);
+	    }
+	}
+    }
+
+  g_free (tmp_buffer);
+}
+
+static void
+fade_bytes (guchar *bytes,
+            int     width,
+            int     distance,
+            int     total)
+{
+  guint32 multiplier = (distance * 0x10000 + 0x8000) / total;
+  int i;
+
+  for (i = 0; i < width; i++)
+    bytes[i] = (bytes[i] * multiplier) >> 16;
+}
+
+/* Swaps width and height. Either swaps in-place and returns the original
+ * buffer or allocates a new buffer, frees the original buffer and returns
+ * the new buffer.
+ */
+static guchar *
+flip_buffer (guchar *buffer,
+	     int     width,
+             int     height)
+{
+  /* Working in blocks increases cache efficiency, compared to reading
+   * or writing an entire column at once */
+#define BLOCK_SIZE 16
+
+  if (width == height)
+    {
+      int i0, j0;
+
+      for (j0 = 0; j0 < height; j0 += BLOCK_SIZE)
+	for (i0 = 0; i0 <= j0; i0 += BLOCK_SIZE)
+	  {
+	    int max_j = MIN(j0 + BLOCK_SIZE, height);
+	    int max_i = MIN(i0 + BLOCK_SIZE, width);
+	    int i, j;
+
+	    if (i0 == j0)
+	      {
+		for (j = j0; j < max_j; j++)
+		  for (i = i0; i < j; i++)
+		    {
+		      guchar tmp = buffer[j * width + i];
+		      buffer[j * width + i] = buffer[i * width + j];
+		      buffer[i * width + j] = tmp;
+		    }
+	      }
+	    else
+	      {
+		for (j = j0; j < max_j; j++)
+		  for (i = i0; i < max_i; i++)
+		    {
+		      guchar tmp = buffer[j * width + i];
+		      buffer[j * width + i] = buffer[i * width + j];
+		      buffer[i * width + j] = tmp;
+		    }
+	      }
+	  }
+
+      return buffer;
+    }
+  else
+    {
+      guchar *new_buffer = g_malloc (height * width);
+      int i0, j0;
+
+      for (i0 = 0; i0 < width; i0 += BLOCK_SIZE)
+        for (j0 = 0; j0 < height; j0 += BLOCK_SIZE)
+	  {
+	    int max_j = MIN(j0 + BLOCK_SIZE, height);
+	    int max_i = MIN(i0 + BLOCK_SIZE, width);
+	    int i, j;
+
+            for (i = i0; i < max_i; i++)
+              for (j = j0; j < max_j; j++)
+		new_buffer[i * height + j] = buffer[j * width + i];
+	  }
+
+      g_free (buffer);
+
+      return new_buffer;
+    }
+#undef BLOCK_SIZE
+}
+
+static void
+make_shadow (MetaShadow     *shadow,
+             cairo_region_t *region)
+{
+  int d = get_box_filter_size (shadow->key.radius);
+  int spread = get_shadow_spread (shadow->key.radius);
+  cairo_rectangle_int_t extents;
+  cairo_region_t *row_convolve_region;
+  cairo_region_t *column_convolve_region;
+  guchar *buffer;
+  int buffer_width;
+  int buffer_height;
+  int x_offset;
+  int y_offset;
+  int n_rectangles, j, k;
+
+  cairo_region_get_extents (region, &extents);
+
+  /* In the case where top_fade >= 0 and the portion above the top
+   * edge of the shape will be cropped, it seems like we could create
+   * a smaller buffer and omit the top portion, but actually, in our
+   * multi-pass blur algorithm, the blur into the area above the window
+   * in the first pass will contribute back to the final pixel values
+   * for the top pixels, so we create a buffer as if we weren't cropping
+   * and only crop when creating the CoglTexture.
+   */
+
+  buffer_width = extents.width + 2 * spread;
+  buffer_height = extents.height + 2 * spread;
+
+  /* Round up so we have aligned rows/columns */
+  buffer_width = (buffer_width + 3) & ~3;
+  buffer_height = (buffer_height + 3) & ~3;
+
+  /* Square buffer allows in-place swaps, which are roughly 70% faster, but we
+   * don't want to over-allocate too much memory.
+   */
+  if (buffer_height < buffer_width && buffer_height > (3 * buffer_width) / 4)
+    buffer_height = buffer_width;
+  if (buffer_width < buffer_height && buffer_width > (3 * buffer_height) / 4)
+    buffer_width = buffer_height;
+
+  buffer = g_malloc0 (buffer_width * buffer_height);
+
+  /* Blurring with multiple box-blur passes is fast, but (especially for
+   * large shadow sizes) we can improve efficiency by restricting the blur
+   * to the region that actually needs to be blurred.
+   */
+  row_convolve_region = meta_make_border_region (region, spread, spread, FALSE);
+  column_convolve_region = meta_make_border_region (region, 0, spread, TRUE);
+
+  /* Offsets between coordinates of the regions and coordinates in the buffer */
+  x_offset = spread;
+  y_offset = spread;
+
+  /* Step 1: unblurred image */
+  n_rectangles = cairo_region_num_rectangles (region);
+  for (k = 0; k < n_rectangles; k++)
+    {
+      cairo_rectangle_int_t rect;
+
+      cairo_region_get_rectangle (region, k, &rect);
+      for (j = y_offset + rect.y; j < y_offset + rect.y + rect.height; j++)
+	memset (buffer + buffer_width * j + x_offset + rect.x, 255, rect.width);
+    }
+
+  /* Step 2: swap rows and columns */
+  buffer = flip_buffer (buffer, buffer_width, buffer_height);
+
+  /* Step 3: blur rows (really columns) */
+  blur_rows (column_convolve_region, y_offset, x_offset,
+             buffer, buffer_height, buffer_width,
+             d);
+
+  /* Step 4: swap rows and columns */
+  buffer = flip_buffer (buffer, buffer_height, buffer_width);
+
+  /* Step 5: blur rows */
+  blur_rows (row_convolve_region, x_offset, y_offset,
+             buffer, buffer_width, buffer_height,
+             d);
+
+  /* Step 6: fade out the top, if applicable */
+  if (shadow->key.top_fade >= 0)
+    {
+      for (j = y_offset; j < y_offset + MIN (shadow->key.top_fade, extents.height + shadow->outer_border_bottom); j++)
+        fade_bytes(buffer + j * buffer_width, buffer_width, j - y_offset, shadow->key.top_fade);
+    }
+
+  /* We offset the passed in pixels to crop off the extra area we allocated at the top
+   * in the case of top_fade >= 0. We also account for padding at the left for symmetry
+   * though that doesn't currently occur.
+   */
+  shadow->texture = cogl_texture_new_from_data (shadow->outer_border_left + extents.width + shadow->outer_border_right,
+                                                shadow->outer_border_top + extents.height + shadow->outer_border_bottom,
+                                                COGL_TEXTURE_NONE,
+                                                COGL_PIXEL_FORMAT_A_8,
+                                                COGL_PIXEL_FORMAT_ANY,
+                                                buffer_width,
+                                                (buffer +
+                                                 (y_offset - shadow->outer_border_top) * buffer_width +
+                                                 (x_offset - shadow->outer_border_left)));
+
+  cairo_region_destroy (row_convolve_region);
+  cairo_region_destroy (column_convolve_region);
+  g_free (buffer);
+
+  shadow->material = meta_create_texture_material (shadow->texture);
+}
+
+static MetaShadowParams *
+get_shadow_params (MetaShadowFactory *factory,
+                   const char        *class_name,
+                   gboolean           focused,
+                   gboolean           create)
+{
+  MetaShadowClassInfo *class_info = g_hash_table_lookup (factory->shadow_classes,
+                                                         class_name);
+  if (class_info == NULL)
+    {
+      if (create)
+        {
+          class_info = g_slice_new0 (MetaShadowClassInfo);
+          *class_info = default_shadow_classes[0];
+          class_info->name = g_strdup (class_info->name);
+
+          g_hash_table_insert (factory->shadow_classes,
+                               (char *)class_info->name, class_info);
+        }
+      else
+        {
+          class_info = &default_shadow_classes[0];
+        }
+    }
+
+  if (focused)
+    return &class_info->focused;
+  else
+    return &class_info->unfocused;
+}
+
+/**
+ * meta_shadow_factory_get_shadow:
+ * @factory: a #MetaShadowFactory
+ * @shape: the size-invariant shape of the window's region
+ * @width: the actual width of the window's region
+ * @height: the actual height of the window's region
+ * @class_name: name of the class of window shadows
+ * @focused: whether the shadow is for a focused window
+ *
+ * Gets the appropriate shadow object for drawing shadows for the
+ * specified window shape. The region that we are shadowing is specified
+ * as a combination of a size-invariant extracted shape and the size.
+ * In some cases, the same shadow object can be shared between sizes;
+ * in other cases a different shadow object is used for each size.
+ *
+ * Return value: (transfer full): a newly referenced #MetaShadow; unref with
+ *  meta_shadow_unref()
+ */
+MetaShadow *
+meta_shadow_factory_get_shadow (MetaShadowFactory *factory,
+                                MetaWindowShape   *shape,
+                                int                width,
+                                int                height,
+                                const char        *class_name,
+                                gboolean           focused)
+{
+  MetaShadowParams *params;
+  MetaShadowCacheKey key;
+  MetaShadow *shadow;
+  cairo_region_t *region;
+  int spread;
+  int shape_border_top, shape_border_right, shape_border_bottom, shape_border_left;
+  int inner_border_top, inner_border_right, inner_border_bottom, inner_border_left;
+  int outer_border_top, outer_border_right, outer_border_bottom, outer_border_left;
+  gboolean scale_width, scale_height;
+  gboolean cacheable;
+  int center_width, center_height;
+
+  g_return_val_if_fail (META_IS_SHADOW_FACTORY (factory), NULL);
+  g_return_val_if_fail (shape != NULL, NULL);
+
+  /* Using a single shadow texture for different window sizes only works
+   * when there is a central scaled area that is greater than twice
+   * the spread of the gaussian blur we are applying to get to the
+   * shadow image.
+   *                         *********          ***********
+   *  /----------\         *###########*      *#############*
+   *  |          |   =>   **#*********#** => **#***********#**
+   *  |          |        **#**     **#**    **#**       **#**
+   *  |          |        **#*********#**    **#***********#**
+   *  \----------/         *###########*      *#############*
+   *                         **********         ************
+   *   Original                Blur            Stretched Blur
+   *
+   * For smaller sizes, we create a separate shadow image for each size;
+   * since we assume that there will be little reuse, we don't try to
+   * cache such images but just recreate them. (Since the current cache
+   * policy is to only keep around referenced shadows, there wouldn't
+   * be any harm in caching them, it would just make the book-keeping
+   * a bit tricker.)
+   *
+   * In the case where we are fading a the top, that also has to fit
+   * within the top unscaled border.
+   */
+
+  params = get_shadow_params (factory, class_name, focused, FALSE);
+
+  spread = get_shadow_spread (params->radius);
+  meta_window_shape_get_borders (shape,
+                                 &shape_border_top,
+                                 &shape_border_right,
+                                 &shape_border_bottom,
+                                 &shape_border_left);
+
+  inner_border_top = MAX (shape_border_top + spread, params->top_fade);
+  outer_border_top = params->top_fade >= 0 ? 0 : spread;
+  inner_border_right = shape_border_right + spread;
+  outer_border_right = spread;
+  inner_border_bottom = shape_border_bottom + spread;
+  outer_border_bottom = spread;
+  inner_border_left = shape_border_left + spread;
+  outer_border_left = spread;
+
+  scale_width = inner_border_left + inner_border_right <= width;
+  scale_height = inner_border_top + inner_border_bottom <= height;
+  cacheable = scale_width && scale_height;
+
+  if (cacheable)
+    {
+      key.shape = shape;
+      key.radius = params->radius;
+      key.top_fade = params->top_fade;
+
+      shadow = g_hash_table_lookup (factory->shadows, &key);
+      if (shadow)
+        return meta_shadow_ref (shadow);
+    }
+
+  shadow = g_slice_new0 (MetaShadow);
+
+  shadow->ref_count = 1;
+  shadow->factory = factory;
+  shadow->key.shape = meta_window_shape_ref (shape);
+  shadow->key.radius = params->radius;
+  shadow->key.top_fade = params->top_fade;
+
+  shadow->outer_border_top = outer_border_top;
+  shadow->inner_border_top = inner_border_top;
+  shadow->outer_border_right = outer_border_right;
+  shadow->inner_border_right = inner_border_right;
+  shadow->outer_border_bottom = outer_border_bottom;
+  shadow->inner_border_bottom = inner_border_bottom;
+  shadow->outer_border_left = outer_border_left;
+  shadow->inner_border_left = inner_border_left;
+
+  shadow->scale_width = scale_width;
+  if (scale_width)
+    center_width = inner_border_left + inner_border_right - (shape_border_left + shape_border_right);
+  else
+    center_width = width - (shape_border_left + shape_border_right);
+
+  shadow->scale_height = scale_height;
+  if (scale_height)
+    center_height = inner_border_top + inner_border_bottom - (shape_border_top + shape_border_bottom);
+  else
+    center_height = height - (shape_border_top + shape_border_bottom);
+
+  g_assert (center_width >= 0 && center_height >= 0);
+
+  region = meta_window_shape_to_region (shape, center_width, center_height);
+  make_shadow (shadow, region);
+
+  cairo_region_destroy (region);
+
+  if (cacheable)
+    g_hash_table_insert (factory->shadows, &shadow->key, shadow);
+
+  return shadow;
+}
+
+/**
+ * meta_shadow_factory_set_params:
+ * @factory: a #MetaShadowFactory
+ * @class_name: name of the class of shadow to set the params for.
+ *  the default shadow classes are the names of the different
+ *  theme frame types (normal, dialog, modal_dialog, utility,
+ *  border, menu, attached) and in addition, popup-menu
+ *  and dropdown-menu.
+ * @focused: whether the shadow is for a focused window
+ * @params: new parameter values
+ *
+ * Updates the shadow parameters for a particular class of shadows
+ * for either the focused or unfocused state. If the class name
+ * does not name an existing class, a new class will be created
+ * (the other focus state for that class will have default values
+ * assigned to it.)
+ */
+void
+meta_shadow_factory_set_params (MetaShadowFactory *factory,
+                                const char        *class_name,
+                                gboolean           focused,
+                                MetaShadowParams  *params)
+{
+  MetaShadowParams *stored_params;
+
+  g_return_if_fail (META_IS_SHADOW_FACTORY (factory));
+  g_return_if_fail (class_name != NULL);
+  g_return_if_fail (params != NULL);
+  g_return_if_fail (params->radius >= 0);
+
+  stored_params = get_shadow_params (factory, class_name, focused, TRUE);
+
+  *stored_params = *params;
+
+  g_signal_emit (factory, signals[CHANGED], 0);
+}
+
+/**
+ * meta_shadow_factory_get_params:
+ * @factory: a #MetaShadowFactory
+ * @class_name: name of the class of shadow to get the params for
+ * @focused: whether the shadow is for a focused window
+ * @params: (out caller-allocates): location to store the current parameter values
+ *
+ * Gets the shadow parameters for a particular class of shadows
+ * for either the focused or unfocused state. If the class name
+ * does not name an existing class, default values will be returned
+ * without printing an error.
+ */
+void
+meta_shadow_factory_get_params (MetaShadowFactory *factory,
+                                const char        *class_name,
+                                gboolean           focused,
+                                MetaShadowParams  *params)
+{
+  MetaShadowParams *stored_params;
+
+  g_return_if_fail (META_IS_SHADOW_FACTORY (factory));
+  g_return_if_fail (class_name != NULL);
+
+  stored_params = get_shadow_params (factory, class_name, focused, FALSE);
+
+  if (params)
+    *params = *stored_params;
+}

src/compositor/meta-shaped-texture.c

@@ -0,0 +1,639 @@
+/*
+ * shaped texture
+ *
+ * An actor to draw a texture clipped to a list of rectangles
+ *
+ * Authored By Neil Roberts  <neil@linux.intel.com>
+ *
+ * Copyright (C) 2008 Intel Corporation
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.
+ */
+
+#include <config.h>
+
+#include "meta-shaped-texture.h"
+#include "meta-texture-tower.h"
+
+#include <clutter/clutter.h>
+#include <cogl/cogl.h>
+#include <string.h>
+
+static void meta_shaped_texture_dispose  (GObject    *object);
+static void meta_shaped_texture_finalize (GObject    *object);
+static void meta_shaped_texture_notify   (GObject    *object,
+					  GParamSpec *pspec);
+
+static void meta_shaped_texture_paint (ClutterActor       *actor);
+static void meta_shaped_texture_pick  (ClutterActor       *actor,
+				       const ClutterColor *color);
+
+static void meta_shaped_texture_update_area (ClutterX11TexturePixmap *texture,
+					     int                      x,
+					     int                      y,
+					     int                      width,
+					     int                      height);
+
+static void meta_shaped_texture_dirty_mask (MetaShapedTexture *stex);
+
+#ifdef HAVE_GLX_TEXTURE_PIXMAP
+G_DEFINE_TYPE (MetaShapedTexture, meta_shaped_texture,
+               CLUTTER_GLX_TYPE_TEXTURE_PIXMAP);
+#else /* HAVE_GLX_TEXTURE_PIXMAP */
+G_DEFINE_TYPE (MetaShapedTexture, meta_shaped_texture,
+               CLUTTER_X11_TYPE_TEXTURE_PIXMAP);
+#endif /* HAVE_GLX_TEXTURE_PIXMAP */
+
+#define META_SHAPED_TEXTURE_GET_PRIVATE(obj) \
+  (G_TYPE_INSTANCE_GET_PRIVATE ((obj), META_TYPE_SHAPED_TEXTURE, \
+                                MetaShapedTexturePrivate))
+
+struct _MetaShapedTexturePrivate
+{
+  MetaTextureTower *paint_tower;
+  CoglHandle mask_texture;
+  CoglHandle material;
+  CoglHandle material_unshaped;
+
+  cairo_region_t *clip_region;
+
+  guint mask_width, mask_height;
+
+  GArray *rectangles;
+
+  guint create_mipmaps : 1;
+};
+
+static void
+meta_shaped_texture_class_init (MetaShapedTextureClass *klass)
+{
+  GObjectClass *gobject_class = (GObjectClass *) klass;
+  ClutterActorClass *actor_class = (ClutterActorClass *) klass;
+  ClutterX11TexturePixmapClass *x11_texture_class = (ClutterX11TexturePixmapClass *) klass;
+
+  gobject_class->dispose = meta_shaped_texture_dispose;
+  gobject_class->finalize = meta_shaped_texture_finalize;
+  gobject_class->notify = meta_shaped_texture_notify;
+
+  actor_class->paint = meta_shaped_texture_paint;
+  actor_class->pick = meta_shaped_texture_pick;
+
+  x11_texture_class->update_area = meta_shaped_texture_update_area;
+
+  g_type_class_add_private (klass, sizeof (MetaShapedTexturePrivate));
+}
+
+static void
+meta_shaped_texture_init (MetaShapedTexture *self)
+{
+  MetaShapedTexturePrivate *priv;
+
+  priv = self->priv = META_SHAPED_TEXTURE_GET_PRIVATE (self);
+
+  priv->rectangles = g_array_new (FALSE, FALSE, sizeof (XRectangle));
+
+  priv->paint_tower = meta_texture_tower_new ();
+  priv->mask_texture = COGL_INVALID_HANDLE;
+  priv->create_mipmaps = TRUE;
+}
+
+static void
+meta_shaped_texture_dispose (GObject *object)
+{
+  MetaShapedTexture *self = (MetaShapedTexture *) object;
+  MetaShapedTexturePrivate *priv = self->priv;
+
+  if (priv->paint_tower)
+    meta_texture_tower_free (priv->paint_tower);
+  priv->paint_tower = NULL;
+
+  meta_shaped_texture_dirty_mask (self);
+
+  if (priv->material != COGL_INVALID_HANDLE)
+    {
+      cogl_handle_unref (priv->material);
+      priv->material = COGL_INVALID_HANDLE;
+    }
+  if (priv->material_unshaped != COGL_INVALID_HANDLE)
+    {
+      cogl_handle_unref (priv->material_unshaped);
+      priv->material_unshaped = COGL_INVALID_HANDLE;
+    }
+
+  meta_shaped_texture_set_clip_region (self, NULL);
+
+  G_OBJECT_CLASS (meta_shaped_texture_parent_class)->dispose (object);
+}
+
+static void
+meta_shaped_texture_finalize (GObject *object)
+{
+  MetaShapedTexture *self = (MetaShapedTexture *) object;
+  MetaShapedTexturePrivate *priv = self->priv;
+
+  g_array_free (priv->rectangles, TRUE);
+
+  G_OBJECT_CLASS (meta_shaped_texture_parent_class)->finalize (object);
+}
+
+static void
+meta_shaped_texture_notify (GObject    *object,
+			    GParamSpec *pspec)
+{
+  if (G_OBJECT_CLASS (meta_shaped_texture_parent_class)->notify)
+    G_OBJECT_CLASS (meta_shaped_texture_parent_class)->notify (object, pspec);
+
+  /* It seems like we could just do this out of update_area(), but unfortunately,
+   * clutter_glx_texture_pixmap() doesn't call through the vtable on the
+   * initial update_area, so we need to look for changes to the texture
+   * explicitly.
+   */
+  if (strcmp (pspec->name, "cogl-texture") == 0)
+    {
+      MetaShapedTexture *stex = (MetaShapedTexture *) object;
+      MetaShapedTexturePrivate *priv = stex->priv;
+
+      meta_shaped_texture_clear (stex);
+
+      if (priv->create_mipmaps)
+	meta_texture_tower_set_base_texture (priv->paint_tower,
+					       clutter_texture_get_cogl_texture (CLUTTER_TEXTURE (stex)));
+    }
+}
+
+static void
+meta_shaped_texture_dirty_mask (MetaShapedTexture *stex)
+{
+  MetaShapedTexturePrivate *priv = stex->priv;
+
+  if (priv->mask_texture != COGL_INVALID_HANDLE)
+    {
+      GLuint mask_gl_tex;
+      GLenum mask_gl_target;
+
+      cogl_texture_get_gl_texture (priv->mask_texture,
+                                   &mask_gl_tex, &mask_gl_target);
+
+#ifdef GL_TEXTURE_RECTANGLE_ARB
+      if (mask_gl_target == GL_TEXTURE_RECTANGLE_ARB)
+        glDeleteTextures (1, &mask_gl_tex);
+#endif
+
+      cogl_handle_unref (priv->mask_texture);
+      priv->mask_texture = COGL_INVALID_HANDLE;
+
+      if (priv->material != COGL_INVALID_HANDLE)
+        cogl_material_set_layer (priv->material, 1, COGL_INVALID_HANDLE);
+    }
+}
+
+static void
+meta_shaped_texture_ensure_mask (MetaShapedTexture *stex)
+{
+  MetaShapedTexturePrivate *priv = stex->priv;
+  CoglHandle paint_tex;
+  guint tex_width, tex_height;
+
+  paint_tex = clutter_texture_get_cogl_texture (CLUTTER_TEXTURE (stex));
+
+  if (paint_tex == COGL_INVALID_HANDLE)
+    return;
+
+  tex_width = cogl_texture_get_width (paint_tex);
+  tex_height = cogl_texture_get_height (paint_tex);
+
+  /* If the mask texture we have was created for a different size then
+     recreate it */
+  if (priv->mask_texture != COGL_INVALID_HANDLE
+      && (priv->mask_width != tex_width || priv->mask_height != tex_height))
+    meta_shaped_texture_dirty_mask (stex);
+
+  /* If we don't have a mask texture yet then create one */
+  if (priv->mask_texture == COGL_INVALID_HANDLE)
+    {
+      guchar *mask_data;
+      const XRectangle *rect;
+      GLenum paint_gl_target;
+
+      /* Create data for an empty image */
+      mask_data = g_malloc0 (tex_width * tex_height);
+
+      /* Cut out a hole for each rectangle */
+      for (rect = (XRectangle *) priv->rectangles->data
+             + priv->rectangles->len;
+           rect-- > (XRectangle *) priv->rectangles->data;)
+        {
+          gint x1 = rect->x, x2 = x1 + rect->width;
+          gint y1 = rect->y, y2 = y1 + rect->height;
+          guchar *p;
+
+          /* Clip the rectangle to the size of the texture */
+          x1 = CLAMP (x1, 0, (gint) tex_width - 1);
+          x2 = CLAMP (x2, x1, (gint) tex_width);
+          y1 = CLAMP (y1, 0, (gint) tex_height - 1);
+          y2 = CLAMP (y2, y1, (gint) tex_height);
+
+          /* Fill the rectangle */
+          for (p = mask_data + y1 * tex_width + x1;
+               y1 < y2;
+               y1++, p += tex_width)
+            memset (p, 255, x2 - x1);
+        }
+
+      cogl_texture_get_gl_texture (paint_tex, NULL, &paint_gl_target);
+
+#ifdef GL_TEXTURE_RECTANGLE_ARB
+      if (paint_gl_target == GL_TEXTURE_RECTANGLE_ARB)
+        {
+          GLuint tex;
+
+          glGenTextures (1, &tex);
+          glBindTexture (GL_TEXTURE_RECTANGLE_ARB, tex);
+          glPixelStorei (GL_UNPACK_ROW_LENGTH, tex_width);
+          glPixelStorei (GL_UNPACK_ALIGNMENT, 1);
+          glPixelStorei (GL_UNPACK_SKIP_ROWS, 0);
+          glPixelStorei (GL_UNPACK_SKIP_PIXELS, 0);
+          glTexImage2D (GL_TEXTURE_RECTANGLE_ARB, 0,
+                        GL_ALPHA, tex_width, tex_height,
+                        0, GL_ALPHA, GL_UNSIGNED_BYTE, mask_data);
+
+          priv->mask_texture
+            = cogl_texture_new_from_foreign (tex,
+                                             GL_TEXTURE_RECTANGLE_ARB,
+                                             tex_width, tex_height,
+                                             0, 0,
+                                             COGL_PIXEL_FORMAT_A_8);
+        }
+      else
+#endif /* GL_TEXTURE_RECTANGLE_ARB */
+        priv->mask_texture = cogl_texture_new_from_data (tex_width, tex_height,
+                                                         COGL_TEXTURE_NONE,
+                                                         COGL_PIXEL_FORMAT_A_8,
+                                                         COGL_PIXEL_FORMAT_ANY,
+                                                         tex_width,
+                                                         mask_data);
+
+      g_free (mask_data);
+
+      priv->mask_width = tex_width;
+      priv->mask_height = tex_height;
+    }
+}
+
+static void
+meta_shaped_texture_paint (ClutterActor *actor)
+{
+  MetaShapedTexture *stex = (MetaShapedTexture *) actor;
+  MetaShapedTexturePrivate *priv = stex->priv;
+  CoglHandle paint_tex;
+  guint tex_width, tex_height;
+  ClutterActorBox alloc;
+
+  static CoglHandle material_template = COGL_INVALID_HANDLE;
+  static CoglHandle material_unshaped_template = COGL_INVALID_HANDLE;
+
+  CoglHandle material;
+
+  if (priv->clip_region && cairo_region_is_empty (priv->clip_region))
+    return;
+
+  if (!CLUTTER_ACTOR_IS_REALIZED (CLUTTER_ACTOR (stex)))
+    clutter_actor_realize (CLUTTER_ACTOR (stex));
+
+  /* The GL EXT_texture_from_pixmap extension does allow for it to be
+   * used together with SGIS_generate_mipmap, however this is very
+   * rarely supported. Also, even when it is supported there
+   * are distinct performance implications from:
+   *
+   *  - Updating mipmaps that we don't need
+   *  - Having to reallocate pixmaps on the server into larger buffers
+   *
+   * So, we just unconditionally use our mipmap emulation code. If we
+   * wanted to use SGIS_generate_mipmap, we'd have to  query COGL to
+   * see if it was supported (no API currently), and then if and only
+   * if that was the case, set the clutter texture quality to HIGH.
+   * Setting the texture quality to high without SGIS_generate_mipmap
+   * support for TFP textures will result in fallbacks to XGetImage.
+   */
+  if (priv->create_mipmaps)
+    paint_tex = meta_texture_tower_get_paint_texture (priv->paint_tower);
+  else
+    paint_tex = clutter_texture_get_cogl_texture (CLUTTER_TEXTURE (stex));
+
+  if (paint_tex == COGL_INVALID_HANDLE)
+    return;
+
+  tex_width = cogl_texture_get_width (paint_tex);
+  tex_height = cogl_texture_get_height (paint_tex);
+
+  if (tex_width == 0 || tex_height == 0) /* no contents yet */
+    return;
+
+  if (priv->rectangles->len < 1)
+    {
+      /* If there are no rectangles use a single-layer texture */
+
+      if (priv->material_unshaped == COGL_INVALID_HANDLE) 
+        {
+          if (G_UNLIKELY (material_unshaped_template == COGL_INVALID_HANDLE))
+            material_unshaped_template = cogl_material_new ();
+
+          priv->material_unshaped = cogl_material_copy (material_unshaped_template);
+        }
+        material = priv->material_unshaped;
+    }
+  else
+    {
+      meta_shaped_texture_ensure_mask (stex);
+
+      if (priv->material == COGL_INVALID_HANDLE)
+	{
+	   if (G_UNLIKELY (material_template == COGL_INVALID_HANDLE))
+	    {
+	      material_template =  cogl_material_new ();
+	      cogl_material_set_layer_combine (material_template, 1,
+					   "RGBA = MODULATE (PREVIOUS, TEXTURE[A])",
+					   NULL);
+	    }
+	  priv->material = cogl_material_copy (material_template);
+	}
+      material = priv->material;
+
+      cogl_material_set_layer (material, 1, priv->mask_texture);
+    }
+
+  cogl_material_set_layer (material, 0, paint_tex);
+
+  {
+    CoglColor color;
+    guchar opacity = clutter_actor_get_paint_opacity (actor);
+    cogl_color_set_from_4ub (&color, opacity, opacity, opacity, opacity);
+    cogl_material_set_color (material, &color);
+  }
+
+  cogl_set_source (material);
+
+  clutter_actor_get_allocation_box (actor, &alloc);
+
+  if (priv->clip_region)
+    {
+      int n_rects;
+      int i;
+
+      /* Limit to how many separate rectangles we'll draw; beyond this just
+       * fall back and draw the whole thing */
+#     define MAX_RECTS 16
+
+      n_rects = cairo_region_num_rectangles (priv->clip_region);
+      if (n_rects <= MAX_RECTS)
+	{
+	  float coords[8];
+          float x1, y1, x2, y2;
+
+	  for (i = 0; i < n_rects; i++)
+	    {
+	      cairo_rectangle_int_t rect;
+
+	      cairo_region_get_rectangle (priv->clip_region, i, &rect);
+
+	      x1 = rect.x;
+	      y1 = rect.y;
+	      x2 = rect.x + rect.width;
+	      y2 = rect.y + rect.height;
+
+	      coords[0] = rect.x / (alloc.x2 - alloc.x1);
+	      coords[1] = rect.y / (alloc.y2 - alloc.y1);
+	      coords[2] = (rect.x + rect.width) / (alloc.x2 - alloc.x1);
+	      coords[3] = (rect.y + rect.height) / (alloc.y2 - alloc.y1);
+
+              coords[4] = coords[0];
+              coords[5] = coords[1];
+              coords[6] = coords[2];
+              coords[7] = coords[3];
+
+              cogl_rectangle_with_multitexture_coords (x1, y1, x2, y2,
+                                                       &coords[0], 8);
+            }
+
+	  return;
+	}
+    }
+
+  cogl_rectangle (0, 0,
+		  alloc.x2 - alloc.x1,
+		  alloc.y2 - alloc.y1);
+}
+
+static void
+meta_shaped_texture_pick (ClutterActor       *actor,
+			  const ClutterColor *color)
+{
+  MetaShapedTexture *stex = (MetaShapedTexture *) actor;
+  MetaShapedTexturePrivate *priv = stex->priv;
+
+  /* If there are no rectangles then use the regular pick */
+  if (priv->rectangles->len < 1)
+    CLUTTER_ACTOR_CLASS (meta_shaped_texture_parent_class)
+      ->pick (actor, color);
+  else if (clutter_actor_should_pick_paint (actor))
+    {
+      CoglHandle paint_tex;
+      ClutterActorBox alloc;
+      guint tex_width, tex_height;
+
+      paint_tex = clutter_texture_get_cogl_texture (CLUTTER_TEXTURE (stex));
+
+      if (paint_tex == COGL_INVALID_HANDLE)
+        return;
+
+      tex_width = cogl_texture_get_width (paint_tex);
+      tex_height = cogl_texture_get_height (paint_tex);
+
+      if (tex_width == 0 || tex_height == 0) /* no contents yet */
+        return;
+
+      meta_shaped_texture_ensure_mask (stex);
+
+      cogl_set_source_color4ub (color->red, color->green, color->blue,
+                                 color->alpha);
+
+      clutter_actor_get_allocation_box (actor, &alloc);
+
+      /* Paint the mask rectangle in the given color */
+      cogl_set_source_texture (priv->mask_texture);
+      cogl_rectangle_with_texture_coords (0, 0,
+                                          alloc.x2 - alloc.x1,
+                                          alloc.y2 - alloc.y1,
+                                          0, 0, 1, 1);
+    }
+}
+
+static void
+meta_shaped_texture_update_area (ClutterX11TexturePixmap *texture,
+				 int                      x,
+				 int                      y,
+				 int                      width,
+				 int                      height)
+{
+  MetaShapedTexture *stex = (MetaShapedTexture *) texture;
+  MetaShapedTexturePrivate *priv = stex->priv;
+
+  CLUTTER_X11_TEXTURE_PIXMAP_CLASS (meta_shaped_texture_parent_class)->update_area (texture,
+                                                                                      x, y, width, height);
+
+  meta_texture_tower_update_area (priv->paint_tower, x, y, width, height);
+}
+
+ClutterActor *
+meta_shaped_texture_new (void)
+{
+  ClutterActor *self = g_object_new (META_TYPE_SHAPED_TEXTURE, NULL);
+
+  return self;
+}
+
+void
+meta_shaped_texture_set_create_mipmaps (MetaShapedTexture *stex,
+					gboolean           create_mipmaps)
+{
+  MetaShapedTexturePrivate *priv;
+
+  g_return_if_fail (META_IS_SHAPED_TEXTURE (stex));
+
+  priv = stex->priv;
+
+  create_mipmaps = create_mipmaps != FALSE;
+
+  if (create_mipmaps != priv->create_mipmaps)
+    {
+      CoglHandle base_texture;
+
+      priv->create_mipmaps = create_mipmaps;
+
+      base_texture = create_mipmaps ?
+	clutter_texture_get_cogl_texture (CLUTTER_TEXTURE (stex)) : COGL_INVALID_HANDLE;
+
+      meta_texture_tower_set_base_texture (priv->paint_tower, base_texture);
+    }
+}
+
+/* This is a workaround for deficiencies in the hack tower:
+ *
+ * When we call clutter_x11_texture_pixmap_set_pixmap(tp, None),
+ * ClutterX11TexturePixmap knows that it has to get rid of the old texture, but
+ * clutter_texture_set_cogl_texture(texture, COGL_INVALID_HANDLE) isn't allowed, so
+ * it grabs the material for the texture and manually sets the texture in it. This means
+ * that the "cogl-texture" property isn't notified, so we don't find out about it.
+ *
+ * And if we keep the CoglX11TexturePixmap around after the X pixmap is freed, then
+ * we'll trigger X errors when we actually try to free it.
+ *
+ * The only correct thing to do here is to change our code to derive
+ * from ClutterActor and get rid of the inheritance hack tower.  Once
+ * we want to depend on Clutter-1.4 (which has CoglTexturePixmapX11),
+ * that will be very easy to do.
+ */
+void
+meta_shaped_texture_clear (MetaShapedTexture *stex)
+{
+  MetaShapedTexturePrivate *priv;
+
+  g_return_if_fail (META_IS_SHAPED_TEXTURE (stex));
+
+  priv = stex->priv;
+
+  meta_texture_tower_set_base_texture (priv->paint_tower, COGL_INVALID_HANDLE);
+
+  if (priv->material != COGL_INVALID_HANDLE)
+    cogl_material_set_layer (priv->material, 0, COGL_INVALID_HANDLE);
+
+  if (priv->material_unshaped != COGL_INVALID_HANDLE)
+    cogl_material_set_layer (priv->material_unshaped, 0, COGL_INVALID_HANDLE);
+}
+
+void
+meta_shaped_texture_clear_rectangles (MetaShapedTexture *stex)
+{
+  MetaShapedTexturePrivate *priv;
+
+  g_return_if_fail (META_IS_SHAPED_TEXTURE (stex));
+
+  priv = stex->priv;
+
+  g_array_set_size (priv->rectangles, 0);
+  meta_shaped_texture_dirty_mask (stex);
+  clutter_actor_queue_redraw (CLUTTER_ACTOR (stex));
+}
+
+void
+meta_shaped_texture_add_rectangle (MetaShapedTexture *stex,
+				   const XRectangle  *rect)
+{
+  g_return_if_fail (META_IS_SHAPED_TEXTURE (stex));
+
+  meta_shaped_texture_add_rectangles (stex, 1, rect);
+}
+
+void
+meta_shaped_texture_add_rectangles (MetaShapedTexture *stex,
+				    size_t             num_rects,
+				    const XRectangle  *rects)
+{
+  MetaShapedTexturePrivate *priv;
+
+  g_return_if_fail (META_IS_SHAPED_TEXTURE (stex));
+
+  priv = stex->priv;
+
+  g_array_append_vals (priv->rectangles, rects, num_rects);
+
+  meta_shaped_texture_dirty_mask (stex);
+  clutter_actor_queue_redraw (CLUTTER_ACTOR (stex));
+}
+
+/**
+ * meta_shaped_texture_set_clip_region:
+ * @frame: a #TidyTextureframe
+ * @clip_region: (transfer full): the region of the texture that
+ *   is visible and should be painted. OWNERSHIP IS ASSUMED BY
+ *   THE FUNCTION (for efficiency to avoid a copy.)
+ *
+ * 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);
+      priv->clip_region = NULL;
+    }
+
+  priv->clip_region = clip_region;
+}

src/compositor/meta-shaped-texture.h

@@ -0,0 +1,94 @@
+/*
+ * shaped texture
+ *
+ * An actor to draw a texture clipped to a list of rectangles
+ *
+ * Authored By Neil Roberts  <neil@linux.intel.com>
+ *
+ * Copyright (C) 2008 Intel Corporation
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.
+ */
+
+#ifndef __META_SHAPED_TEXTURE_H__
+#define __META_SHAPED_TEXTURE_H__
+
+#include <config.h>
+
+#include <clutter/clutter.h>
+#ifdef HAVE_GLX_TEXTURE_PIXMAP
+#include <clutter/glx/clutter-glx.h>
+#else
+#include <clutter/x11/clutter-x11.h>
+#endif /* HAVE_GLX_TEXTURE_PIXMAP */
+
+G_BEGIN_DECLS
+
+#define META_TYPE_SHAPED_TEXTURE            (meta_shaped_texture_get_type())
+#define META_SHAPED_TEXTURE(obj)            (G_TYPE_CHECK_INSTANCE_CAST ((obj),META_TYPE_SHAPED_TEXTURE, MetaShapedTexture))
+#define META_SHAPED_TEXTURE_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST ((klass), META_TYPE_SHAPED_TEXTURE, MetaShapedTextureClass))
+#define META_IS_SHAPED_TEXTURE(obj)         (G_TYPE_CHECK_INSTANCE_TYPE ((obj), META_TYPE_SHAPED_TEXTURE))
+#define META_IS_SHAPED_TEXTURE_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), META_TYPE_SHAPED_TEXTURE))
+#define META_SHAPED_TEXTURE_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS ((obj), META_TYPE_SHAPED_TEXTURE, MetaShapedTextureClass))
+
+typedef struct _MetaShapedTexture        MetaShapedTexture;
+typedef struct _MetaShapedTextureClass   MetaShapedTextureClass;
+typedef struct _MetaShapedTexturePrivate MetaShapedTexturePrivate;
+
+struct _MetaShapedTextureClass
+{
+#ifdef HAVE_GLX_TEXTURE_PIXMAP
+  ClutterGLXTexturePixmapClass parent_class;
+#else
+  ClutterX11TexturePixmapClass parent_class;
+#endif
+};
+
+struct _MetaShapedTexture
+{
+#ifdef HAVE_GLX_TEXTURE_PIXMAP
+  ClutterGLXTexturePixmap parent;
+#else
+  ClutterX11TexturePixmap parent;
+#endif
+
+  MetaShapedTexturePrivate *priv;
+};
+
+GType meta_shaped_texture_get_type (void) G_GNUC_CONST;
+
+ClutterActor *meta_shaped_texture_new (void);
+
+void meta_shaped_texture_set_create_mipmaps (MetaShapedTexture *stex,
+					     gboolean           create_mipmaps);
+
+void meta_shaped_texture_clear (MetaShapedTexture *stex);
+
+void meta_shaped_texture_clear_rectangles (MetaShapedTexture *stex);
+
+void meta_shaped_texture_add_rectangle  (MetaShapedTexture *stex,
+					 const XRectangle  *rect);
+void meta_shaped_texture_add_rectangles (MetaShapedTexture *stex,
+					 size_t             num_rects,
+					 const XRectangle  *rects);
+
+/* Assumes ownership of clip_region */
+void meta_shaped_texture_set_clip_region (MetaShapedTexture *stex,
+					  cairo_region_t    *clip_region);
+
+G_END_DECLS
+
+#endif /* __META_SHAPED_TEXTURE_H__ */

src/compositor/meta-texture-tower.c

@@ -0,0 +1,662 @@
+/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
+/*
+ * MetaTextureTower
+ *
+ * Mipmap emulation by creation of scaled down images
+ *
+ * Copyright (C) 2009 Red Hat, Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.
+ */
+
+#include <math.h>
+#include <string.h>
+
+#include "meta-texture-tower.h"
+
+#ifndef M_LOG2E
+#define M_LOG2E 1.4426950408889634074
+#endif
+
+#define MAX_TEXTURE_LEVELS 12
+
+/* If the texture format in memory doesn't match this, then Mesa
+ * will do the conversion, so things will still work, but it might
+ * be slow depending on how efficient Mesa is. These should be the
+ * native formats unless the display is 16bpp. If conversions
+ * here are a bottleneck, investigate whether we are converting when
+ * storing window data *into* the texture before adding extra code
+ * to handle multiple texture formats.
+ */
+#if G_BYTE_ORDER == G_LITTLE_ENDIAN
+#define TEXTURE_FORMAT COGL_PIXEL_FORMAT_BGRA_8888_PRE
+#else
+#define TEXTURE_FORMAT COGL_PIXEL_FORMAT_ARGB_8888_PRE
+#endif
+
+typedef struct
+{
+  guint16 x1;
+  guint16 y1;
+  guint16 x2;
+  guint16 y2;
+} Box;
+
+struct _MetaTextureTower
+{
+  int n_levels;
+  CoglHandle textures[MAX_TEXTURE_LEVELS];
+  CoglHandle fbos[MAX_TEXTURE_LEVELS];
+  Box invalid[MAX_TEXTURE_LEVELS];
+};
+
+/**
+ * meta_texture_tower_new:
+ *
+ * Creates a new texture tower. The base texture has to be set with
+ * meta_texture_tower_set_base_texture() before use.
+ *
+ * Return value: the new texture tower. Free with meta_texture_tower_free()
+ */
+MetaTextureTower *
+meta_texture_tower_new (void)
+{
+  MetaTextureTower *tower;
+
+  tower = g_slice_new0 (MetaTextureTower);
+
+  return tower;
+}
+
+/**
+ * meta_texture_tower_free:
+ * @tower: a #MetaTextureTower
+ *
+ * Frees a texture tower created with meta_texture_tower_new().
+ */
+void
+meta_texture_tower_free (MetaTextureTower *tower)
+{
+  g_return_if_fail (tower != NULL);
+
+  meta_texture_tower_set_base_texture (tower, COGL_INVALID_HANDLE);
+
+  g_slice_free (MetaTextureTower, tower);
+}
+
+#ifdef GL_TEXTURE_RECTANGLE_ARB
+static gboolean
+texture_is_rectangle (CoglHandle texture)
+{
+  GLuint gl_tex;
+  GLenum gl_target;
+
+  cogl_texture_get_gl_texture (texture, &gl_tex, &gl_target);
+  return gl_target == GL_TEXTURE_RECTANGLE_ARB;
+}
+#endif /* GL_TEXTURE_RECTANGLE_ARB */
+
+static void
+free_texture (CoglHandle texture)
+{
+#ifdef GL_TEXTURE_RECTANGLE_ARB
+  GLuint gl_tex;
+  GLenum gl_target;
+
+  cogl_texture_get_gl_texture (texture, &gl_tex, &gl_target);
+
+  if (gl_target == GL_TEXTURE_RECTANGLE_ARB)
+    glDeleteTextures (1, &gl_tex);
+#endif /* GL_TEXTURE_RECTANGLE_ARB */
+
+  cogl_handle_unref (texture);
+}
+
+/**
+ * meta_texture_tower_update_area:
+ * @tower: a MetaTextureTower
+ * @texture: the new texture used as a base for scaled down versions
+ *
+ * Sets the base texture that is the scaled texture that the
+ * scaled textures of the tower are derived from. The texture itself
+ * will be used as level 0 of the tower and will be referenced until
+ * unset or until the tower is freed.
+ */
+void
+meta_texture_tower_set_base_texture (MetaTextureTower *tower,
+                                     CoglHandle        texture)
+{
+  int i;
+
+  g_return_if_fail (tower != NULL);
+
+  if (texture == tower->textures[0])
+    return;
+
+  if (tower->textures[0] != COGL_INVALID_HANDLE)
+    {
+      for (i = 1; i < tower->n_levels; i++)
+        {
+          if (tower->textures[i] != COGL_INVALID_HANDLE)
+            {
+              free_texture (tower->textures[i]);
+              tower->textures[i] = COGL_INVALID_HANDLE;
+            }
+
+          if (tower->fbos[i] != COGL_INVALID_HANDLE)
+            {
+              cogl_handle_unref (tower->fbos[i]);
+              tower->fbos[i] = COGL_INVALID_HANDLE;
+            }
+        }
+
+      cogl_handle_unref (tower->textures[0]);
+    }
+
+  tower->textures[0] = texture;
+
+  if (tower->textures[0] != COGL_INVALID_HANDLE)
+    {
+      int width, height;
+
+      cogl_handle_ref (tower->textures[0]);
+
+      width = cogl_texture_get_width (tower->textures[0]);
+      height = cogl_texture_get_height (tower->textures[0]);
+
+      tower->n_levels = 1 + MAX ((int)(M_LOG2E * log (width)), (int)(M_LOG2E * log (height)));
+      tower->n_levels = MIN(tower->n_levels, MAX_TEXTURE_LEVELS);
+
+      meta_texture_tower_update_area (tower, 0, 0, width, height);
+    }
+  else
+    {
+      tower->n_levels = 0;
+    }
+}
+
+/**
+ * meta_texture_tower_update_area:
+ * @tower: a MetaTextureTower
+ * @x: X coordinate of upper left of rectangle that changed
+ * @y: Y coordinate of upper left of rectangle that changed
+ * @width: width of rectangle that changed
+ * @height: height rectangle that changed
+ *
+ * Mark a region of the base texture as having changed; the next
+ * time a scaled down version of the base texture is retrieved,
+ * the appropriate area of the scaled down texture will be updated.
+ */
+void
+meta_texture_tower_update_area (MetaTextureTower *tower,
+                                int               x,
+                                int               y,
+                                int               width,
+                                int               height)
+{
+  int texture_width, texture_height;
+  Box invalid;
+  int i;
+
+  g_return_if_fail (tower != NULL);
+
+  texture_width = cogl_texture_get_width (tower->textures[0]);
+  texture_height = cogl_texture_get_height (tower->textures[0]);
+
+  invalid.x1 = x;
+  invalid.y1 = y;
+  invalid.x2 = x + width;
+  invalid.y2 = y + height;
+
+  for (i = 1; i < tower->n_levels; i++)
+    {
+      texture_width = MAX (1, texture_width / 2);
+      texture_height = MAX (1, texture_height / 2);
+
+      invalid.x1 = invalid.x1 / 2;
+      invalid.y1 = invalid.y1 / 2;
+      invalid.x2 = MIN (texture_width, (invalid.x2 + 1) / 2);
+      invalid.y2 = MIN (texture_height, (invalid.y2 + 1) / 2);
+
+      if (tower->invalid[i].x1 == tower->invalid[i].x2 ||
+          tower->invalid[i].y1 == tower->invalid[i].y2)
+        {
+          tower->invalid[i] = invalid;
+        }
+      else
+        {
+          tower->invalid[i].x1 = MIN (tower->invalid[i].x1, invalid.x1);
+          tower->invalid[i].y1 = MIN (tower->invalid[i].y1, invalid.y1);
+          tower->invalid[i].x2 = MAX (tower->invalid[i].x2, invalid.x2);
+          tower->invalid[i].y2 = MAX (tower->invalid[i].y2, invalid.y2);
+        }
+    }
+}
+
+/* It generally looks worse if we scale up a window texture by even a
+ * small amount than if we scale it down using bilinear filtering, so
+ * we always pick the *larger* adjacent level. */
+#define LOD_BIAS (-0.49)
+
+/* This determines the appropriate level of detail to use when drawing the
+ * texture, in a way that corresponds to what the GL specification does
+ * when mip-mapping. This is probably fancier and slower than what we need,
+ * but we do the computation only once each time we paint a window, and
+ * its easier to just use the equations from the specification than to
+ * come up with something simpler.
+ *
+ * If window is being painted at an angle from the viewer, then we have to
+ * pick a point in the texture; we use the middle of the texture (which is
+ * why the width/height are passed in.) This is not the normal case for
+ * Meta.
+ */
+static int
+get_paint_level (int width, int height)
+{
+  CoglMatrix projection, modelview, pm;
+  float v[4];
+  double viewport_width, viewport_height;
+  double u0, v0;
+  double xc, yc, wc;
+  double dxdu_, dxdv_, dydu_, dydv_;
+  double det_, det_sq;
+  double rho_sq;
+  double lambda;
+
+  /* See
+   * http://www.opengl.org/registry/doc/glspec32.core.20090803.pdf
+   * Section 3.8.9, p. 1.6.2. Here we have
+   *
+   *  u(x,y) = x_o;
+   *  v(x,y) = y_o;
+   *
+   * Since we are mapping 1:1 from object coordinates into pixel
+   * texture coordinates, the clip coordinates are:
+   *
+   *  (x_c)                               (x_o)        (u)
+   *  (y_c) = (M_projection)(M_modelview) (y_o) = (PM) (v)
+   *  (z_c)                               (z_o)        (0)
+   *  (w_c)                               (w_o)        (1)
+   */
+
+  cogl_get_projection_matrix (&projection);
+  cogl_get_modelview_matrix (&modelview);
+
+  cogl_matrix_multiply (&pm, &projection, &modelview);
+
+  cogl_get_viewport (v);
+  viewport_width = v[2];
+  viewport_height = v[3];
+
+  u0 = width / 2.;
+  v0 = height / 2.;
+
+  xc = pm.xx * u0 + pm.xy * v0 + pm.xw;
+  yc = pm.yx * u0 + pm.yy * v0 + pm.yw;
+  wc = pm.wx * u0 + pm.wy * v0 + pm.ww;
+
+  /* We'll simplify the equations below for a bit of micro-optimization.
+   * The commented out code is the unsimplified version.
+
+  // Partial derivates of window coordinates:
+  //
+  //  x_w = 0.5 * viewport_width * x_c / w_c + viewport_center_x
+  //  y_w = 0.5 * viewport_height * y_c / w_c + viewport_center_y
+  //
+  // with respect to u, v, using
+  // d(a/b)/dx = da/dx * (1/b) - a * db/dx / (b^2)
+
+  dxdu = 0.5 * viewport_width * (pm.xx - pm.wx * (xc/wc)) / wc;
+  dxdv = 0.5 * viewport_width * (pm.xy - pm.wy * (xc/wc)) / wc;
+  dydu = 0.5 * viewport_height * (pm.yx - pm.wx * (yc/wc)) / wc;
+  dydv = 0.5 * viewport_height * (pm.yy - pm.wy * (yc/wc)) / wc;
+
+  // Compute the inverse partials as the matrix inverse
+  det = dxdu * dydv - dxdv * dydu;
+
+  dudx =   dydv / det;
+  dudy = - dxdv / det;
+  dvdx = - dydu / det;
+  dvdy =   dvdu / det;
+
+  // Scale factor; maximum of the distance in texels for a change of 1 pixel
+  // in the X direction or 1 pixel in the Y direction
+  rho = MAX (sqrt (dudx * dudx + dvdx * dvdx), sqrt(dudy * dudy + dvdy * dvdy));
+
+  // Level of detail
+  lambda = log2 (rho) + LOD_BIAS;
+  */
+
+  /* dxdu * wc, etc */
+  dxdu_ = 0.5 * viewport_width * (pm.xx - pm.wx * (xc/wc));
+  dxdv_ = 0.5 * viewport_width * (pm.xy - pm.wy * (xc/wc));
+  dydu_ = 0.5 * viewport_height * (pm.yx - pm.wx * (yc/wc));
+  dydv_ = 0.5 * viewport_height * (pm.yy - pm.wy * (yc/wc));
+
+  /* det * wc^2 */
+  det_ = dxdu_ * dydv_ - dxdv_ * dydu_;
+  det_sq = det_ * det_;
+  if (det_sq == 0.0)
+    return -1;
+
+  /* (rho * det * wc)^2 */
+  rho_sq = MAX (dydv_ * dydv_ + dydu_ * dydu_, dxdv_ * dxdv_ + dxdu_ * dxdu_);
+  lambda = 0.5 * M_LOG2E * log (rho_sq * wc * wc / det_sq) + LOD_BIAS;
+
+#if 0
+  g_print ("%g %g %g\n", 0.5 * viewport_width * pm.xx / pm.ww, 0.5 * viewport_height * pm.yy / pm.ww, lambda);
+#endif
+
+  if (lambda <= 0.)
+    return 0;
+  else
+    return (int)(0.5 + lambda);
+}
+
+#ifdef GL_TEXTURE_RECTANGLE_ARB
+static gboolean
+is_power_of_two (int x)
+{
+  return (x & (x - 1)) == 0;
+}
+#endif /* GL_TEXTURE_RECTANGLE_ARB */
+
+static void
+texture_tower_create_texture (MetaTextureTower *tower,
+                              int               level,
+                              int               width,
+                              int               height)
+{
+#ifdef GL_TEXTURE_RECTANGLE_ARB
+  if ((!is_power_of_two (width) || !is_power_of_two (height)) &&
+      texture_is_rectangle (tower->textures[level - 1]))
+    {
+      GLuint tex = 0;
+
+      glGenTextures (1, &tex);
+      glBindTexture (GL_TEXTURE_RECTANGLE_ARB, tex);
+      glTexImage2D (GL_TEXTURE_RECTANGLE_ARB, 0,
+                    GL_RGBA, width,height,
+#if TEXTURE_FORMAT == COGL_PIXEL_FORMAT_BGRA_8888_PRE
+                    0, GL_BGRA, GL_UNSIGNED_BYTE,
+#else /* assume big endian */
+                    0, GL_BGRA, GL_UNSIGNED_INT_8_8_8_8_REV,
+#endif
+                    NULL);
+
+      tower->textures[level] = cogl_texture_new_from_foreign (tex, GL_TEXTURE_RECTANGLE_ARB,
+                                                              width, height,
+                                                              0, 0,
+                                                              TEXTURE_FORMAT);
+    }
+  else
+#endif /* GL_TEXTURE_RECTANGLE_ARB */
+    {
+      tower->textures[level] = cogl_texture_new_with_size (width, height,
+                                                           COGL_TEXTURE_NO_AUTO_MIPMAP,
+                                                           TEXTURE_FORMAT);
+    }
+
+  tower->invalid[level].x1 = 0;
+  tower->invalid[level].y1 = 0;
+  tower->invalid[level].x2 = width;
+  tower->invalid[level].y2 = height;
+}
+
+static gboolean
+texture_tower_revalidate_fbo (MetaTextureTower *tower,
+                              int               level)
+{
+  CoglHandle source_texture = tower->textures[level - 1];
+  int source_texture_width = cogl_texture_get_width (source_texture);
+  int source_texture_height = cogl_texture_get_height (source_texture);
+  CoglHandle dest_texture = tower->textures[level];
+  int dest_texture_width = cogl_texture_get_width (dest_texture);
+  int dest_texture_height = cogl_texture_get_height (dest_texture);
+  Box *invalid = &tower->invalid[level];
+  CoglMatrix modelview;
+
+  if (tower->fbos[level] == COGL_INVALID_HANDLE)
+    {
+      /* Work around http://bugzilla.openedhand.com/show_bug.cgi?id=2110 */
+      cogl_flush();
+
+      tower->fbos[level] = cogl_offscreen_new_to_texture (dest_texture);
+    }
+
+  if (tower->fbos[level] == COGL_INVALID_HANDLE)
+    return FALSE;
+
+  cogl_push_framebuffer (tower->fbos[level]);
+
+  cogl_ortho (0, dest_texture_width, dest_texture_height, 0, -1., 1.);
+
+  cogl_matrix_init_identity (&modelview);
+  cogl_set_modelview_matrix (&modelview);
+
+  cogl_set_source_texture (tower->textures[level - 1]);
+  cogl_rectangle_with_texture_coords (invalid->x1, invalid->y1,
+                                      invalid->x2, invalid->y2,
+                                      (2. * invalid->x1) / source_texture_width,
+                                      (2. * invalid->y1) / source_texture_height,
+                                      (2. * invalid->x2) / source_texture_width,
+                                      (2. * invalid->y2) / source_texture_height);
+
+  cogl_pop_framebuffer ();
+
+  return TRUE;
+}
+
+static void
+fill_copy (guchar       *buf,
+           const guchar *source,
+           int           width)
+{
+  memcpy (buf, source, width * 4);
+}
+
+static void
+fill_scale_down (guchar       *buf,
+                 const guchar *source,
+                 int           width)
+{
+  while (width > 1)
+    {
+      buf[0] = (source[0] + source[4]) / 2;
+      buf[1] = (source[1] + source[5]) / 2;
+      buf[2] = (source[2] + source[6]) / 2;
+      buf[3] = (source[3] + source[7]) / 2;
+
+      buf += 4;
+      source += 8;
+      width -= 2;
+    }
+
+  if (width > 0)
+    {
+      buf[0] = source[0] / 2;
+      buf[1] = source[1] / 2;
+      buf[2] = source[2] / 2;
+      buf[3] = source[3] / 2;
+    }
+}
+
+static void
+texture_tower_revalidate_client (MetaTextureTower *tower,
+                                 int               level)
+{
+  CoglHandle source_texture = tower->textures[level - 1];
+  int source_texture_width = cogl_texture_get_width (source_texture);
+  int source_texture_height = cogl_texture_get_height (source_texture);
+  guint source_rowstride;
+  guchar *source_data;
+  CoglHandle dest_texture = tower->textures[level];
+  int dest_texture_width = cogl_texture_get_width (dest_texture);
+  int dest_texture_height = cogl_texture_get_height (dest_texture);
+  int dest_x = tower->invalid[level].x1;
+  int dest_y = tower->invalid[level].y1;
+  int dest_width = tower->invalid[level].x2 - tower->invalid[level].x1;
+  int dest_height = tower->invalid[level].y2 - tower->invalid[level].y1;
+  guchar *dest_data;
+  guchar *source_tmp1 = NULL, *source_tmp2 = NULL;
+  int i, j;
+
+  source_rowstride = source_texture_width * 4;
+
+  source_data = g_malloc (source_texture_height * source_rowstride);
+  cogl_texture_get_data (source_texture, TEXTURE_FORMAT, source_rowstride,
+                         source_data);
+
+  dest_data = g_malloc (dest_height * dest_width * 4);
+
+  if (dest_texture_height < source_texture_height)
+    {
+      source_tmp1 = g_malloc (dest_width * 4);
+      source_tmp2 = g_malloc (dest_width * 4);
+    }
+
+  for (i = 0; i < dest_height; i++)
+    {
+      guchar *dest_row = dest_data + i * dest_width * 4;
+      if (dest_texture_height < source_texture_height)
+        {
+          guchar *source1, *source2;
+          guchar *dest;
+
+          if (dest_texture_width < source_texture_width)
+            {
+              fill_scale_down (source_tmp1,
+                               source_data + ((i + dest_y) * 2) * source_rowstride + dest_x * 2 * 4,
+                               dest_width * 2);
+              fill_scale_down (source_tmp2,
+                               source_data + ((i + dest_y) * 2 + 1) * source_rowstride + dest_x * 2 * 4,
+                               dest_width * 2);
+            }
+          else
+            {
+              fill_copy (source_tmp1,
+                         source_data + ((i + dest_y) * 2) * source_rowstride + dest_x * 4,
+                         dest_width);
+              fill_copy (source_tmp2,
+                         source_data + ((i + dest_y) * 2 + 1) * source_rowstride + dest_x * 4,
+                         dest_width);
+            }
+
+          source1 = source_tmp1;
+          source2 = source_tmp2;
+
+          dest = dest_row;
+          for (j = 0; j < dest_width * 4; j++)
+            *(dest++) = (*(source1++) + *(source2++)) / 2;
+        }
+      else
+        {
+          if (dest_texture_width < source_texture_width)
+            fill_scale_down (dest_row,
+                             source_data + (i + dest_y) * source_rowstride + dest_x * 2 * 4,
+                             dest_width * 2);
+          else
+            fill_copy (dest_row,
+                       source_data + (i + dest_y) * source_rowstride,
+                       dest_width);
+        }
+    }
+
+  cogl_texture_set_region (dest_texture,
+                           0, 0,
+                           dest_x, dest_y,
+                           dest_width, dest_height,
+                           dest_width, dest_height,
+                           TEXTURE_FORMAT,
+                           4 * dest_width,
+                           dest_data);
+
+  if (dest_height < source_texture_height)
+    {
+      g_free (source_tmp1);
+      g_free (source_tmp2);
+    }
+
+  g_free (source_data);
+  g_free (dest_data);
+}
+
+static void
+texture_tower_revalidate (MetaTextureTower *tower,
+                          int               level)
+{
+  if (!texture_tower_revalidate_fbo (tower, level))
+    texture_tower_revalidate_client (tower, level);
+}
+
+/**
+ * meta_texture_tower_get_paint_texture:
+ * @tower: a MetaTextureTower
+ *
+ * Gets the texture from the tower that best matches the current
+ * rendering scale. (On the assumption here the texture is going to
+ * be rendered with vertex coordinates that correspond to its
+ * size in pixels, so a 200x200 texture will be rendered on the
+ * rectangle (0, 0, 200, 200).
+ *
+ * Return value: the COGL texture handle to use for painting, or
+ *  %COGL_INVALID_HANDLE if no base texture has yet been set.
+ */
+CoglHandle
+meta_texture_tower_get_paint_texture (MetaTextureTower *tower)
+{
+  int texture_width, texture_height;
+  int level;
+
+  g_return_val_if_fail (tower != NULL, COGL_INVALID_HANDLE);
+
+  if (tower->textures[0] == COGL_INVALID_HANDLE)
+    return COGL_INVALID_HANDLE;
+
+  texture_width = cogl_texture_get_width (tower->textures[0]);
+  texture_height = cogl_texture_get_height (tower->textures[0]);
+
+  level = get_paint_level(texture_width, texture_height);
+  if (level < 0) /* singular paint matrix, scaled to nothing */
+    return COGL_INVALID_HANDLE;
+  level = MIN (level, tower->n_levels - 1);
+
+  if (tower->textures[level] == COGL_INVALID_HANDLE ||
+      (tower->invalid[level].x2 != tower->invalid[level].x1 &&
+       tower->invalid[level].y2 != tower->invalid[level].y1))
+    {
+      int i;
+
+      for (i = 1; i <= level; i++)
+       {
+         /* Use "floor" convention here to be consistent with the NPOT texture extension */
+         texture_width = MAX (1, texture_width / 2);
+         texture_height = MAX (1, texture_height / 2);
+
+         if (tower->textures[i] == COGL_INVALID_HANDLE)
+           texture_tower_create_texture (tower, i, texture_width, texture_height);
+       }
+
+      for (i = 1; i <= level; i++)
+       {
+         if (tower->invalid[level].x2 != tower->invalid[level].x1 &&
+             tower->invalid[level].y2 != tower->invalid[level].y1)
+           texture_tower_revalidate (tower, i);
+       }
+   }
+
+  return tower->textures[level];
+}

src/compositor/meta-texture-tower.h

@@ -0,0 +1,69 @@
+/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
+/*
+ * MetaTextureTower
+ *
+ * Mipmap emulation by creation of scaled down images
+ *
+ * Copyright (C) 2009 Red Hat, Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.
+ */
+
+#ifndef __META_TEXTURE_TOWER_H__
+#define __META_TEXTURE_TOWER_H__
+
+#include <clutter/clutter.h>
+
+G_BEGIN_DECLS
+
+/**
+ * SECTION:MetaTextureTower
+ * @short_description: mipmap emulation by creation of scaled down images
+ *
+ * A #MetaTextureTower is used to get good looking scaled down images when
+ * we can't use the GL drivers mipmap support. There are two separate reasons
+ *
+ *  - Some cards (including radeon cards <= r5xx) only support
+ *    TEXTURE_RECTANGLE_ARB and not NPOT textures. Rectangular textures
+ *    are defined not to support mipmapping.
+ *  - Even when NPOT textures are available, the combination of NPOT
+ *    textures, texture_from_pixmap, and mipmapping doesn't typically
+ *    work, since the X server doesn't allocate pixmaps in the right
+ *    layout for mipmapping.
+ *
+ * So, what we do is create the "mipmap" levels ourselves by successive
+ * power-of-two scaledowns, and when rendering pick the single texture
+ * that best matches the scale we are rendering at. (Since we aren't
+ * typically using perspective transforms, we'll frequently have a single
+ * scale for the entire texture.)
+ */
+
+typedef struct _MetaTextureTower MetaTextureTower;
+
+MetaTextureTower *meta_texture_tower_new               (void);
+void              meta_texture_tower_free              (MetaTextureTower *tower);
+void              meta_texture_tower_set_base_texture  (MetaTextureTower *tower,
+                                                        CoglHandle        texture);
+void              meta_texture_tower_update_area       (MetaTextureTower *tower,
+                                                        int               x,
+                                                        int               y,
+                                                        int               width,
+                                                        int               height);
+CoglHandle        meta_texture_tower_get_paint_texture (MetaTextureTower *tower);
+
+G_BEGIN_DECLS
+
+#endif /* __META_TEXTURE_TOWER_H__ */

src/compositor/meta-window-actor-private.h

@@ -0,0 +1,53 @@
+/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
+
+#ifndef META_WINDOW_ACTOR_PRIVATE_H
+#define META_WINDOW_ACTOR_PRIVATE_H
+
+#include <config.h>
+
+#include <X11/extensions/Xdamage.h>
+#include <meta/compositor-mutter.h>
+
+MetaWindowActor *meta_window_actor_new (MetaWindow *window);
+
+void meta_window_actor_destroy   (MetaWindowActor *self);
+
+void meta_window_actor_show (MetaWindowActor *self,
+                             MetaCompEffect   effect);
+void meta_window_actor_hide (MetaWindowActor *self,
+                             MetaCompEffect   effect);
+
+void meta_window_actor_maximize   (MetaWindowActor *self,
+                                   MetaRectangle   *old_rect,
+                                   MetaRectangle   *new_rect);
+void meta_window_actor_unmaximize (MetaWindowActor *self,
+                                   MetaRectangle   *old_rect,
+                                   MetaRectangle   *new_rect);
+
+void meta_window_actor_process_damage (MetaWindowActor    *self,
+                                       XDamageNotifyEvent *event);
+void meta_window_actor_pre_paint      (MetaWindowActor    *self);
+
+void meta_window_actor_invalidate_shadow (MetaWindowActor *self);
+
+gboolean meta_window_actor_effect_in_progress  (MetaWindowActor *self);
+void     meta_window_actor_sync_actor_position (MetaWindowActor *self);
+void     meta_window_actor_sync_visibility     (MetaWindowActor *self);
+void     meta_window_actor_update_shape        (MetaWindowActor *self,
+                                                gboolean         shaped);
+void     meta_window_actor_update_opacity      (MetaWindowActor *self);
+void     meta_window_actor_mapped              (MetaWindowActor *self);
+void     meta_window_actor_unmapped            (MetaWindowActor *self);
+
+cairo_region_t *meta_window_actor_get_obscured_region (MetaWindowActor *self);
+
+void meta_window_actor_set_visible_region         (MetaWindowActor *self,
+                                                   cairo_region_t  *visible_region);
+void meta_window_actor_set_visible_region_beneath (MetaWindowActor *self,
+                                                   cairo_region_t  *beneath_region);
+void meta_window_actor_reset_visible_regions      (MetaWindowActor *self);
+
+void meta_window_actor_effect_completed (MetaWindowActor *actor,
+                                         gulong           event);
+
+#endif /* META_WINDOW_ACTOR_PRIVATE_H */

src/compositor/meta-window-group.c

@@ -0,0 +1,237 @@
+/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
+
+#include <config.h>
+
+#define _ISOC99_SOURCE /* for roundf */
+#include <math.h>
+
+#include <gdk/gdk.h> /* for gdk_rectangle_intersect() */
+
+#include "meta-window-actor-private.h"
+#include "meta-window-group.h"
+#include "meta-background-actor.h"
+
+struct _MetaWindowGroupClass
+{
+  ClutterGroupClass parent_class;
+};
+
+struct _MetaWindowGroup
+{
+  ClutterGroup parent;
+
+  MetaScreen *screen;
+};
+
+G_DEFINE_TYPE (MetaWindowGroup, meta_window_group, CLUTTER_TYPE_GROUP);
+
+/* We want to find out if the window is "close enough" to
+ * 1:1 transform. We do that by converting the transformed coordinates
+ * to 24.8 fixed-point before checking if they look right.
+ */
+static inline int
+round_to_fixed (float x)
+{
+  return roundf (x * 256);
+}
+
+/* We can only (easily) apply our logic for figuring out what a window
+ * obscures if is not transformed. This function does that check and
+ * as a side effect gets the position of the upper-left corner of the
+ * actors.
+ *
+ * (We actually could handle scaled and non-integrally positioned actors
+ * too as long as they weren't shaped - no filtering is done at the
+ * edges so a rectangle stays a rectangle. But the gain from that is
+ * small, especally since most of our windows are shaped. The simple
+ * case we handle here is the case that matters when the user is just
+ * using the desktop normally.)
+ *
+ * If we assume that the window group is untransformed (it better not
+ * be!) then we could also make this determination by checking directly
+ * if the actor itself is rotated, scaled, or at a non-integral position.
+ * However, the criterion for "close enough" in that case get trickier,
+ * since, for example, the allowed rotation depends on the size of
+ * actor. The approach we take here is to just require everything
+ * to be within 1/256th of a pixel.
+ */
+static gboolean
+actor_is_untransformed (ClutterActor *actor,
+                        int          *x_origin,
+                        int          *y_origin)
+{
+  gfloat widthf, heightf;
+  int width, height;
+  ClutterVertex verts[4];
+  int v0x, v0y, v1x, v1y, v2x, v2y, v3x, v3y;
+  int x, y;
+
+  clutter_actor_get_size (actor, &widthf, &heightf);
+  width = round_to_fixed (widthf); height = round_to_fixed (heightf);
+
+  clutter_actor_get_abs_allocation_vertices (actor, verts);
+  v0x = round_to_fixed (verts[0].x); v0y = round_to_fixed (verts[0].y);
+  v1x = round_to_fixed (verts[1].x); v1y = round_to_fixed (verts[1].y);
+  v2x = round_to_fixed (verts[2].x); v2y = round_to_fixed (verts[2].y);
+  v3x = round_to_fixed (verts[3].x); v3y = round_to_fixed (verts[3].y);
+
+  /* Using shifting for converting fixed => int, gets things right for
+   * negative values. / 256. wouldn't do the same
+   */
+  x = v0x >> 8;
+  y = v0y >> 8;
+
+  /* At integral coordinates? */
+  if (x * 256 != v0x || y * 256 != v0y)
+    return FALSE;
+
+  /* Not scaled? */
+  if (v1x - v0x != width || v2y - v0y != height)
+    return FALSE;
+
+  /* Not rotated/skewed? */
+  if (v0x != v2x || v0y != v1y ||
+      v3x != v1x || v3y != v2y)
+    return FALSE;
+
+  *x_origin = x;
+  *y_origin = y;
+
+  return TRUE;
+}
+
+static void
+meta_window_group_paint (ClutterActor *actor)
+{
+  MetaWindowGroup *window_group = META_WINDOW_GROUP (actor);
+  cairo_region_t *visible_region;
+  GLboolean scissor_test;
+  cairo_rectangle_int_t screen_rect = { 0 };
+  cairo_rectangle_int_t scissor_rect;
+  GList *children, *l;
+
+  /* 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.
+   */
+  children = clutter_container_get_children (CLUTTER_CONTAINER (actor));
+  children = g_list_reverse (children);
+
+  /* Start off with the full screen area (for a multihead setup, we
+   * might want to use a more accurate union of the monitors to avoid
+   * painting in holes from mismatched monitor sizes. That's just an
+   * optimization, however.)
+   */
+  meta_screen_get_size (window_group->screen, &screen_rect.width, &screen_rect.height);
+
+  /* When doing a partial stage paint, Clutter will set the GL scissor
+   * box to the clip rectangle for the partial repaint. We combine the screen
+   * rectangle with the scissor box to get the region we need to
+   * paint. (Strangely, the scissor box sometimes seems to be bigger
+   * than the stage ... Clutter should probably be clampimg)
+   */
+  glGetBooleanv (GL_SCISSOR_TEST, &scissor_test);
+
+  if (scissor_test)
+    {
+      GLint scissor_box[4];
+      glGetIntegerv (GL_SCISSOR_BOX, scissor_box);
+
+      scissor_rect.x = scissor_box[0];
+      scissor_rect.y = screen_rect.height - (scissor_box[1] + scissor_box[3]);
+      scissor_rect.width = scissor_box[2];
+      scissor_rect.height = scissor_box[3];
+
+      gdk_rectangle_intersect (&scissor_rect, &screen_rect, &scissor_rect);
+    }
+  else
+    {
+      scissor_rect = screen_rect;
+    }
+
+  visible_region = cairo_region_create_rectangle (&scissor_rect);
+
+  for (l = children; l; l = l->next)
+    {
+      if (!CLUTTER_ACTOR_IS_VISIBLE (l->data))
+        continue;
+
+      if (META_IS_WINDOW_ACTOR (l->data))
+        {
+          MetaWindowActor *window_actor = l->data;
+          gboolean x, y;
+
+          if (!actor_is_untransformed (CLUTTER_ACTOR (window_actor), &x, &y))
+            continue;
+
+          /* Temporarily move to the coordinate system of the actor */
+          cairo_region_translate (visible_region, - x, - y);
+
+          meta_window_actor_set_visible_region (window_actor, visible_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 (visible_region, obscured_region);
+            }
+
+          meta_window_actor_set_visible_region_beneath (window_actor, visible_region);
+          cairo_region_translate (visible_region, x, y);
+        }
+      else if (META_IS_BACKGROUND_ACTOR (l->data))
+        {
+          MetaBackgroundActor *background_actor = l->data;
+          meta_background_actor_set_visible_region (background_actor, visible_region);
+        }
+    }
+
+  cairo_region_destroy (visible_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)
+   */
+  for (l = children; l; l = l->next)
+    {
+      if (META_IS_WINDOW_ACTOR (l->data))
+        {
+          MetaWindowActor *window_actor = l->data;
+          window_actor = l->data;
+          meta_window_actor_reset_visible_regions (window_actor);
+        }
+      else if (META_IS_BACKGROUND_ACTOR (l->data))
+        {
+          MetaBackgroundActor *background_actor = l->data;
+          meta_background_actor_set_visible_region (background_actor, NULL);
+        }
+    }
+
+  g_list_free (children);
+}
+
+static void
+meta_window_group_class_init (MetaWindowGroupClass *klass)
+{
+  ClutterActorClass *actor_class = CLUTTER_ACTOR_CLASS (klass);
+
+  actor_class->paint = meta_window_group_paint;
+}
+
+static void
+meta_window_group_init (MetaWindowGroup *window_group)
+{
+}
+
+ClutterActor *
+meta_window_group_new (MetaScreen *screen)
+{
+  MetaWindowGroup *window_group;
+
+  window_group = g_object_new (META_TYPE_WINDOW_GROUP, NULL);
+
+  window_group->screen = screen;
+
+  return CLUTTER_ACTOR (window_group);
+}

src/compositor/meta-window-group.h

@@ -0,0 +1,52 @@
+/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
+
+#ifndef META_WINDOW_GROUP_H
+#define META_WINDOW_GROUP_H
+
+#include <clutter/clutter.h>
+
+#include <meta/screen.h>
+
+/**
+ * MetaWindowGroup:
+ *
+ * This class is a subclass of ClutterGroup with special handling for
+ * MetaWindowActor when painting the group. 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.)
+ */
+
+#define META_TYPE_WINDOW_GROUP            (meta_window_group_get_type ())
+#define META_WINDOW_GROUP(obj)            (G_TYPE_CHECK_INSTANCE_CAST ((obj), META_TYPE_WINDOW_GROUP, MetaWindowGroup))
+#define META_WINDOW_GROUP_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST ((klass), META_TYPE_WINDOW_GROUP, MetaWindowGroupClass))
+#define META_IS_WINDOW_GROUP(obj)         (G_TYPE_CHECK_INSTANCE_TYPE ((obj), META_TYPE_WINDOW_GROUP))
+#define META_IS_WINDOW_GROUP_CLASS(klass)  (G_TYPE_CHECK_CLASS_TYPE ((klass), META_TYPE_WINDOW_GROUP))
+#define META_WINDOW_GROUP_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS ((obj), META_TYPE_WINDOW_GROUP, MetaWindowGroupClass))
+
+typedef struct _MetaWindowGroup        MetaWindowGroup;
+typedef struct _MetaWindowGroupClass   MetaWindowGroupClass;
+typedef struct _MetaWindowGroupPrivate MetaWindowGroupPrivate;
+
+GType meta_window_group_get_type (void);
+
+ClutterActor *meta_window_group_new (MetaScreen *screen);
+
+#endif /* META_WINDOW_GROUP_H */

src/compositor/meta-window-shape.c

@@ -0,0 +1,254 @@
+/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
+/*
+ * MetaWindowShape
+ *
+ * Extracted invariant window shape
+ *
+ * Copyright (C) 2010 Red Hat, Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.
+ */
+#include <string.h>
+
+#include "meta-window-shape.h"
+#include "region-utils.h"
+
+struct _MetaWindowShape
+{
+  guint ref_count;
+
+  int top, right, bottom, left;
+  int n_rectangles;
+  cairo_rectangle_int_t *rectangles;
+  guint hash;
+};
+
+MetaWindowShape *
+meta_window_shape_new (cairo_region_t *region)
+{
+  MetaWindowShape *shape;
+  MetaRegionIterator iter;
+  cairo_rectangle_int_t extents;
+  int max_yspan_y1 = 0;
+  int max_yspan_y2 = 0;
+  int max_xspan_x1 = -1;
+  int max_xspan_x2 = -1;
+  guint hash;
+
+  shape = g_slice_new0 (MetaWindowShape);
+  shape->ref_count = 1;
+
+  cairo_region_get_extents (region, &extents);
+
+  shape->n_rectangles = cairo_region_num_rectangles (region);
+
+  if (shape->n_rectangles == 0)
+    {
+      shape->rectangles = NULL;
+      shape->top = shape->right = shape->bottom = shape->left = 0;
+      shape->hash = 0;
+      return shape;
+    }
+
+  for (meta_region_iterator_init (&iter, region);
+       !meta_region_iterator_at_end (&iter);
+       meta_region_iterator_next (&iter))
+    {
+      int max_line_xspan_x1 = -1;
+      int max_line_xspan_x2 = -1;
+
+      if (iter.rectangle.width > max_line_xspan_x2 - max_line_xspan_x1)
+        {
+          max_line_xspan_x1 = iter.rectangle.x;
+          max_line_xspan_x2 = iter.rectangle.x + iter.rectangle.width;
+        }
+
+      if (iter.line_end)
+        {
+          if (iter.rectangle.height > max_yspan_y2 - max_yspan_y1)
+            {
+              max_yspan_y1 = iter.rectangle.y;
+              max_yspan_y2 = iter.rectangle.y + iter.rectangle.height;
+            }
+
+          if (max_xspan_x1 < 0) /* First line */
+            {
+              max_xspan_x1 = max_line_xspan_x1;
+              max_xspan_x2 = max_line_xspan_x2;
+            }
+          else
+            {
+              max_xspan_x1 = MAX (max_xspan_x1, max_line_xspan_x1);
+              max_xspan_x2 = MIN (max_xspan_x2, max_line_xspan_x2);
+
+              if (max_xspan_x2 < max_xspan_x1)
+                max_xspan_x2 = max_xspan_x1;
+            }
+        }
+    }
+
+#if 0
+  g_print ("xspan: %d -> %d, yspan: %d -> %d\n",
+           max_xspan_x1, max_xspan_x2,
+           max_yspan_y1, max_yspan_y2);
+#endif
+
+  shape->top = max_yspan_y1 - extents.y;
+  shape->right = extents.x + extents.width - max_xspan_x2;
+  shape->bottom = extents.y + extents.height - max_yspan_y2;
+  shape->left = max_xspan_x1 - extents.x;
+
+  shape->rectangles = g_new (cairo_rectangle_int_t, shape->n_rectangles);
+
+  hash = 0;
+  for (meta_region_iterator_init (&iter, region);
+       !meta_region_iterator_at_end (&iter);
+       meta_region_iterator_next (&iter))
+    {
+      int x1, x2, y1, y2;
+
+      x1 = iter.rectangle.x;
+      x2 = iter.rectangle.x + iter.rectangle.width;
+      y1 = iter.rectangle.y;
+      y2 = iter.rectangle.y + iter.rectangle.height;
+
+      if (x1 > max_xspan_x1)
+        x1 -= MIN (x1, max_xspan_x2 - 1) - max_xspan_x1;
+      if (x2 > max_xspan_x1)
+        x2 -= MIN (x2, max_xspan_x2 - 1) - max_xspan_x1;
+      if (y1 > max_yspan_y1)
+        y1 -= MIN (y1, max_yspan_y2 - 1) - max_yspan_y1;
+      if (y2 > max_yspan_y1)
+        y2 -= MIN (y2, max_yspan_y2 - 1) - max_yspan_y1;
+
+      shape->rectangles[iter.i].x = x1 - extents.x;
+      shape->rectangles[iter.i].y = y1 - extents.y;
+      shape->rectangles[iter.i].width = x2 - x1;
+      shape->rectangles[iter.i].height = y2 - y1;
+
+#if 0
+      g_print ("%d: +%d+%dx%dx%d => +%d+%dx%dx%d\n",
+               iter.i, iter.rectangle.x, iter.rectangle.y, iter.rectangle.width, iter.rectangle.height,
+               shape->rectangles[iter.i].x, shape->rectangles[iter.i].y,
+               hape->rectangles[iter.i].width, shape->rectangles[iter.i].height);
+#endif
+
+      hash = hash * 31 + x1 * 17 + x2 * 27 + y1 * 37 + y2 * 43;
+    }
+
+  shape->hash = hash;
+
+#if 0
+  g_print ("%d %d %d %d: %#x\n\n", shape->top, shape->right, shape->bottom, shape->left, shape->hash);
+#endif
+
+  return shape;
+}
+
+MetaWindowShape *
+meta_window_shape_ref (MetaWindowShape *shape)
+{
+  shape->ref_count++;
+
+  return shape;
+}
+
+void
+meta_window_shape_unref (MetaWindowShape *shape)
+{
+  shape->ref_count--;
+  if (shape->ref_count == 0)
+    {
+      g_free (shape->rectangles);
+      g_slice_free (MetaWindowShape, shape);
+    }
+}
+
+guint
+meta_window_shape_hash (MetaWindowShape *shape)
+{
+  return shape->hash;
+}
+
+gboolean
+meta_window_shape_equal (MetaWindowShape *shape_a,
+                         MetaWindowShape *shape_b)
+{
+  if (shape_a->n_rectangles != shape_b->n_rectangles)
+    return FALSE;
+
+  return memcmp (shape_a->rectangles, shape_b->rectangles,
+                 sizeof (cairo_rectangle_int_t) * shape_a->n_rectangles) == 0;
+}
+
+void
+meta_window_shape_get_borders (MetaWindowShape *shape,
+                               int             *border_top,
+                               int             *border_right,
+                               int             *border_bottom,
+                               int             *border_left)
+{
+  if (border_top)
+    *border_top = shape->top;
+  if (border_right)
+    *border_right = shape->right;
+  if (border_bottom)
+    *border_bottom = shape->bottom;
+  if (border_left)
+    *border_left = shape->left;
+}
+
+/**
+ * meta_window_shape_to_region:
+ * @shape: a #MetaWindowShape
+ * @center_width: size of the central region horizontally
+ * @center_height: size of the central region vertically
+ *
+ * Converts the shape to to a cairo_region_t using the given width
+ * and height for the central scaled region.
+ *
+ * Return value: a newly created region
+ */
+cairo_region_t *
+meta_window_shape_to_region (MetaWindowShape *shape,
+                             int              center_width,
+                             int              center_height)
+{
+  cairo_region_t *region;
+  int i;
+
+  region = cairo_region_create ();
+
+  for (i = 0; i < shape->n_rectangles; i++)
+    {
+      cairo_rectangle_int_t rect = shape->rectangles[i];
+
+      if (rect.x <= shape->left && rect.x + rect.width >= shape->left + 1)
+        rect.width += center_width;
+      else if (rect.x >= shape->left + 1)
+        rect.x += center_width;
+
+      if (rect.y <= shape->top && rect.y + rect.height >= shape->top + 1)
+        rect.height += center_height;
+      else if (rect.y >= shape->top + 1)
+        rect.y += center_height;
+
+      cairo_region_union_rectangle (region, &rect);
+    }
+
+  return region;
+}
+

src/compositor/meta-window-shape.h

@@ -0,0 +1,60 @@
+/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
+/*
+ * MetaWindowShape
+ *
+ * Extracted invariant window shape
+ *
+ * Copyright (C) 2010 Red Hat, Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.
+ */
+
+#ifndef __META_WINDOW_SHAPE_H__
+#define __META_WINDOW_SHAPE_H__
+
+#include <cairo.h>
+#include <glib.h>
+
+/**
+ * MetaWindowShape:
+ * #MetaWindowShape represents a 9-sliced region with borders on all sides that
+ * are unscaled, and a constant central region that is scaled. For example,
+ * the regions representing two windows that are rounded rectangles,
+ * with the same corner radius but different sizes, have the
+ * same MetaWindowShape.
+ *
+ * #MetaWindowShape is designed to be used as part of a hash table key, so has
+ * efficient hash and equal functions.
+ */
+typedef struct _MetaWindowShape MetaWindowShape;
+
+MetaWindowShape *  meta_window_shape_new         (cairo_region_t  *region);
+MetaWindowShape *  meta_window_shape_ref         (MetaWindowShape *shape);
+void               meta_window_shape_unref       (MetaWindowShape *shape);
+guint              meta_window_shape_hash        (MetaWindowShape *shape);
+gboolean           meta_window_shape_equal       (MetaWindowShape *shape_a,
+                                                  MetaWindowShape *shape_b);
+void               meta_window_shape_get_borders (MetaWindowShape *shape,
+                                                  int             *border_top,
+                                                  int             *border_right,
+                                                  int             *border_bottom,
+                                                  int             *border_left);
+cairo_region_t    *meta_window_shape_to_region   (MetaWindowShape *shape,
+                                                  int              center_width,
+                                                  int              center_height);
+
+#endif /* __META_WINDOW_SHAPE_H __*/
+

src/compositor/mutter/mutter-plugin-manager.c

@@ -1,609 +0,0 @@
-/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
-
-/*
- * Copyright (c) 2008 Intel Corp.
- *
- * Author: Tomas Frydrych <tf@linux.intel.com>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of the
- * License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
- * 02111-1307, USA.
- */
-
-#include "config.h"
-#include "mutter-plugin-manager.h"
-#include "prefs.h"
-#include "errors.h"
-#include "workspace.h"
-#include "mutter-module.h"
-
-#include <string.h>
-
-/*
- * There is only one instace of each module per the process.
- */
-static GHashTable *plugin_modules = NULL;
-
-static gboolean mutter_plugin_manager_reload (MutterPluginManager *plugin_mgr);
-
-struct MutterPluginManager
-{
-  MetaScreen   *screen;
-
-  GList /* MutterPluginPending */ *pending_plugin_modules; /* Plugins not yet fully loaded */
-  GList /* MutterPlugin */       *plugins;  /* TODO -- maybe use hash table */
-  GList                          *unload;  /* Plugins that are disabled and pending unload */
-
-  guint         idle_unload_id;
-};
-
-typedef struct MutterPluginPending
-{
-  MutterModule *module;
-  char *path;
-  char *params;
-} MutterPluginPending;
-
-/*
- * Checks that the plugin is compatible with the WM and sets up the plugin
- * struct.
- */
-static MutterPlugin *
-mutter_plugin_load (MutterPluginManager *mgr,
-                    MutterModule        *module,
-                    const gchar         *params)
-{
-  MutterPlugin *plugin = NULL;
-  GType         plugin_type = mutter_module_get_plugin_type (module);
-
-  if (!plugin_type)
-    {
-      g_warning ("Plugin type not registered !!!");
-      return NULL;
-    }
-
-  plugin = g_object_new (plugin_type,
-                         "screen", mgr->screen,
-                         "params", params,
-                         NULL);
-
-  return plugin;
-}
-
-/*
- * Attempst to unload a plugin; returns FALSE if plugin cannot be unloaded at
- * present (e.g., and effect is in progress) and should be scheduled for
- * removal later.
- */
-static gboolean
-mutter_plugin_unload (MutterPlugin *plugin)
-{
-  if (mutter_plugin_running (plugin))
-    {
-      g_object_set (plugin, "disabled", TRUE, NULL);
-      return FALSE;
-    }
-
-  g_object_unref (plugin);
-
-  return TRUE;
-}
-
-/*
- * Iddle callback to remove plugins that could not be removed directly and are
- * pending for removal.
- */
-static gboolean
-mutter_plugin_manager_idle_unload (MutterPluginManager *plugin_mgr)
-{
-  GList *l = plugin_mgr->unload;
-  gboolean dont_remove = TRUE;
-
-  while (l)
-    {
-      MutterPlugin *plugin = l->data;
-
-      if (mutter_plugin_unload (plugin))
-        {
-          /* Remove from list */
-          GList *p = l->prev;
-          GList *n = l->next;
-
-          if (!p)
-            plugin_mgr->unload = n;
-          else
-            p->next = n;
-
-          if (n)
-            n->prev = p;
-
-          g_list_free_1 (l);
-
-          l = n;
-        }
-      else
-        l = l->next;
-    }
-
-  if (!plugin_mgr->unload)
-    {
-      /* If no more unloads are pending, remove the handler as well */
-      dont_remove = FALSE;
-      plugin_mgr->idle_unload_id = 0;
-    }
-
-  return dont_remove;
-}
-
-/*
- * Unloads all plugins
- */
-static void
-mutter_plugin_manager_unload (MutterPluginManager *plugin_mgr)
-{
-  GList *plugins = plugin_mgr->plugins;
-
-  while (plugins)
-    {
-      MutterPlugin *plugin = plugins->data;
-
-      /* If the plugin could not be removed, move it to the unload list */
-      if (!mutter_plugin_unload (plugin))
-        {
-          plugin_mgr->unload = g_list_prepend (plugin_mgr->unload, plugin);
-
-          if (!plugin_mgr->idle_unload_id)
-            {
-              plugin_mgr->idle_unload_id = g_idle_add ((GSourceFunc)
-                            mutter_plugin_manager_idle_unload,
-                            plugin_mgr);
-            }
-        }
-
-      plugins = plugins->next;
-    }
-
-  g_list_free (plugin_mgr->plugins);
-  plugin_mgr->plugins = NULL;
-}
-
-static void
-prefs_changed_callback (MetaPreference pref,
-                        void          *data)
-{
-  MutterPluginManager *plugin_mgr = data;
-
-  if (pref == META_PREF_CLUTTER_PLUGINS)
-    {
-      mutter_plugin_manager_reload (plugin_mgr);
-    }
-}
-
-static MutterModule *
-mutter_plugin_manager_get_module (const gchar *path)
-{
-  MutterModule *module = g_hash_table_lookup (plugin_modules, path);
-
-  if (!module &&
-      (module = g_object_new (MUTTER_TYPE_MODULE, "path", path, NULL)))
-    {
-      g_hash_table_insert (plugin_modules, g_strdup (path), module);
-    }
-
-  return module;
-}
-
-/*
- * Loads all plugins listed in gconf registry.
- */
-gboolean
-mutter_plugin_manager_load (MutterPluginManager *plugin_mgr)
-{
-  const gchar *dpath = MUTTER_PLUGIN_DIR "/";
-  GSList      *plugins, *fallback = NULL;
-
-  plugins = meta_prefs_get_clutter_plugins ();
-
-  if (!plugins)
-    {
-      /*
-       * If no plugins are specified, try to load the default plugin.
-       */
-      fallback = g_slist_append (fallback, "default");
-      plugins = fallback;
-    }
-
-  while (plugins)
-    {
-      gchar   *plugin_string;
-      gchar   *params;
-
-      plugin_string = g_strdup (plugins->data);
-
-      if (plugin_string)
-        {
-          MutterModule *module;
-          gchar        *path;
-
-          params = strchr (plugin_string, ':');
-
-          if (params)
-            {
-              *params = 0;
-              ++params;
-            }
-
-          if (g_path_is_absolute (plugin_string))
-            path = g_strdup (plugin_string);
-          else
-            path = g_strconcat (dpath, plugin_string, ".so", NULL);
-
-          module = mutter_plugin_manager_get_module (path);
-
-          if (module)
-            {
-              gboolean      use_succeeded;
-
-              /*
-               * This dlopens the module and registers the plugin type with the
-               * GType system, if the module is not already loaded.  When we
-               * create a plugin, the type system also calls g_type_module_use()
-               * to guarantee the module will not be unloaded during the plugin
-               * life time. Consequently we can unuse() the module again.
-               */
-              use_succeeded = g_type_module_use (G_TYPE_MODULE (module));
-
-              if (use_succeeded)
-                {
-                  MutterPluginPending *pending = g_new0 (MutterPluginPending, 1);
-                  pending->module = module;
-                  pending->path = g_strdup (path);
-                  pending->params = g_strdup (params);
-                  plugin_mgr->pending_plugin_modules =
-                    g_list_prepend (plugin_mgr->pending_plugin_modules, pending);
-                }
-            }
-          else
-            g_warning ("Unable to load plugin module [%s]: %s",
-                       path, g_module_error());
-
-          g_free (path);
-          g_free (plugin_string);
-        }
-
-      plugins = plugins->next;
-    }
-
-
-  if (fallback)
-    g_slist_free (fallback);
-
-  if (plugin_mgr->pending_plugin_modules != NULL)
-    {
-      meta_prefs_add_listener (prefs_changed_callback, plugin_mgr);
-      return TRUE;
-    }
-
-  return FALSE;
-}
-
-gboolean
-mutter_plugin_manager_initialize (MutterPluginManager *plugin_mgr)
-{
-  GList *iter;
-
-  for (iter = plugin_mgr->pending_plugin_modules; iter; iter = iter->next)
-    {
-      MutterPluginPending *pending = (MutterPluginPending*) iter->data;
-      MutterPlugin *p;
-
-      if ((p = mutter_plugin_load (plugin_mgr, pending->module, pending->params)))
-        {
-          plugin_mgr->plugins = g_list_prepend (plugin_mgr->plugins, p);
-        }
-      else
-        {
-          g_warning ("Plugin load for [%s] failed", pending->path);
-        }
-
-      g_type_module_unuse (G_TYPE_MODULE (pending->module));
-      g_free (pending->path);
-      g_free (pending->params);
-      g_free (pending);
-    }
-  g_list_free (plugin_mgr->pending_plugin_modules);
-  plugin_mgr->pending_plugin_modules = NULL;
-  return TRUE;
-}
-
-/*
- * Reloads all plugins
- */
-static gboolean
-mutter_plugin_manager_reload (MutterPluginManager *plugin_mgr)
-{
-  /* TODO -- brute force; should we build a list of plugins to load and list of
-   * plugins to unload? We are probably not going to have large numbers of
-   * plugins loaded at the same time, so it might not be worth it.
-   */
-  mutter_plugin_manager_unload (plugin_mgr);
-  return mutter_plugin_manager_load (plugin_mgr);
-}
-
-MutterPluginManager *
-mutter_plugin_manager_new (MetaScreen *screen)
-{
-  MutterPluginManager *plugin_mgr;
-
-  if (!plugin_modules)
-    {
-      plugin_modules = g_hash_table_new_full (g_str_hash, g_str_equal, g_free,
-                                              NULL);
-    }
-
-  plugin_mgr = g_new0 (MutterPluginManager, 1);
-
-  plugin_mgr->screen        = screen;
-
-  return plugin_mgr;
-}
-
-static void
-mutter_plugin_manager_kill_effect (MutterPluginManager *plugin_mgr,
-                                   MutterWindow        *actor,
-                                   unsigned long        events)
-{
-  GList *l = plugin_mgr->plugins;
-
-  while (l)
-    {
-      MutterPlugin        *plugin = l->data;
-      MutterPluginClass   *klass = MUTTER_PLUGIN_GET_CLASS (plugin);
-
-      if (!mutter_plugin_disabled (plugin)
-	  && (mutter_plugin_features (plugin) & events)
-	  && klass->kill_effect)
-        klass->kill_effect (plugin, actor, events);
-
-      l = l->next;
-    }
-}
-
-#define ALL_BUT_SWITCH \
-  MUTTER_PLUGIN_ALL_EFFECTS & \
-  ~MUTTER_PLUGIN_SWITCH_WORKSPACE
-/*
- * Public method that the compositor hooks into for events that require
- * no additional parameters.
- *
- * Returns TRUE if at least one of the plugins handled the event type (i.e.,
- * if the return value is FALSE, there will be no subsequent call to the
- * manager completed() callback, and the compositor must ensure that any
- * appropriate post-effect cleanup is carried out.
- */
-gboolean
-mutter_plugin_manager_event_simple (MutterPluginManager *plugin_mgr,
-                                    MutterWindow        *actor,
-                                    unsigned long        event)
-{
-  GList *l = plugin_mgr->plugins;
-  gboolean retval = FALSE;
-
-  while (l)
-    {
-      MutterPlugin        *plugin = l->data;
-      MutterPluginClass   *klass = MUTTER_PLUGIN_GET_CLASS (plugin);
-
-      if (!mutter_plugin_disabled (plugin) &&
-          (mutter_plugin_features (plugin) & event))
-        {
-          retval = TRUE;
-
-          switch (event)
-            {
-            case MUTTER_PLUGIN_MINIMIZE:
-              if (klass->minimize)
-                {
-                  mutter_plugin_manager_kill_effect (
-		      plugin_mgr,
-		      actor,
-		      ALL_BUT_SWITCH);
-
-                  _mutter_plugin_effect_started (plugin);
-                  klass->minimize (plugin, actor);
-                }
-              break;
-            case MUTTER_PLUGIN_MAP:
-              if (klass->map)
-                {
-                  mutter_plugin_manager_kill_effect (
-		      plugin_mgr,
-		      actor,
-		      ALL_BUT_SWITCH);
-
-                  _mutter_plugin_effect_started (plugin);
-                  klass->map (plugin, actor);
-                }
-              break;
-            case MUTTER_PLUGIN_DESTROY:
-              if (klass->destroy)
-                {
-                  _mutter_plugin_effect_started (plugin);
-                  klass->destroy (plugin, actor);
-                }
-              break;
-            default:
-              g_warning ("Incorrect handler called for event %lu", event);
-            }
-        }
-
-      l = l->next;
-    }
-
-  return retval;
-}
-
-/*
- * The public method that the compositor hooks into for maximize and unmaximize
- * events.
- *
- * Returns TRUE if at least one of the plugins handled the event type (i.e.,
- * if the return value is FALSE, there will be no subsequent call to the
- * manager completed() callback, and the compositor must ensure that any
- * appropriate post-effect cleanup is carried out.
- */
-gboolean
-mutter_plugin_manager_event_maximize (MutterPluginManager *plugin_mgr,
-                                      MutterWindow        *actor,
-                                      unsigned long        event,
-                                      gint                 target_x,
-                                      gint                 target_y,
-                                      gint                 target_width,
-                                      gint                 target_height)
-{
-  GList *l = plugin_mgr->plugins;
-  gboolean retval = FALSE;
-
-  while (l)
-    {
-      MutterPlugin        *plugin = l->data;
-      MutterPluginClass   *klass = MUTTER_PLUGIN_GET_CLASS (plugin);
-
-      if (!mutter_plugin_disabled (plugin) &&
-          (mutter_plugin_features (plugin) & event))
-        {
-          retval = TRUE;
-
-          switch (event)
-            {
-            case MUTTER_PLUGIN_MAXIMIZE:
-              if (klass->maximize)
-                {
-                  mutter_plugin_manager_kill_effect (
-		      plugin_mgr,
-		      actor,
-		      ALL_BUT_SWITCH);
-
-                  _mutter_plugin_effect_started (plugin);
-                  klass->maximize (plugin, actor,
-                                   target_x, target_y,
-                                   target_width, target_height);
-                }
-              break;
-            case MUTTER_PLUGIN_UNMAXIMIZE:
-              if (klass->unmaximize)
-                {
-                  mutter_plugin_manager_kill_effect (
-		      plugin_mgr,
-		      actor,
-		      ALL_BUT_SWITCH);
-
-                  _mutter_plugin_effect_started (plugin);
-                  klass->unmaximize (plugin, actor,
-                                     target_x, target_y,
-                                     target_width, target_height);
-                }
-              break;
-            default:
-              g_warning ("Incorrect handler called for event %lu", event);
-            }
-        }
-
-      l = l->next;
-    }
-
-  return retval;
-}
-
-/*
- * The public method that the compositor hooks into for desktop switching.
- *
- * Returns TRUE if at least one of the plugins handled the event type (i.e.,
- * if the return value is FALSE, there will be no subsequent call to the
- * manager completed() callback, and the compositor must ensure that any
- * appropriate post-effect cleanup is carried out.
- */
-gboolean
-mutter_plugin_manager_switch_workspace (MutterPluginManager *plugin_mgr,
-                                        const GList        **actors,
-                                        gint                 from,
-                                        gint                 to,
-                                        MetaMotionDirection  direction)
-{
-  GList *l = plugin_mgr->plugins;
-  gboolean retval = FALSE;
-
-  while (l)
-    {
-      MutterPlugin        *plugin = l->data;
-      MutterPluginClass   *klass = MUTTER_PLUGIN_GET_CLASS (plugin);
-
-      if (!mutter_plugin_disabled (plugin) &&
-          (mutter_plugin_features (plugin) & MUTTER_PLUGIN_SWITCH_WORKSPACE) &&
-          (actors && *actors))
-        {
-          if (klass->switch_workspace)
-            {
-              retval = TRUE;
-              mutter_plugin_manager_kill_effect (
-		  plugin_mgr,
-		  MUTTER_WINDOW ((*actors)->data),
-		  MUTTER_PLUGIN_SWITCH_WORKSPACE);
-
-              _mutter_plugin_effect_started (plugin);
-              klass->switch_workspace (plugin, actors, from, to, direction);
-            }
-        }
-
-      l = l->next;
-    }
-
-  return retval;
-}
-
-/*
- * The public method that the compositor hooks into for desktop switching.
- *
- * Returns TRUE if at least one of the plugins handled the event type (i.e.,
- * if the return value is FALSE, there will be no subsequent call to the
- * manager completed() callback, and the compositor must ensure that any
- * appropriate post-effect cleanup is carried out.
- */
-gboolean
-mutter_plugin_manager_xevent_filter (MutterPluginManager *plugin_mgr,
-                                     XEvent              *xev)
-{
-  GList *l;
-
-  if (!plugin_mgr)
-    return FALSE;
-
-  l = plugin_mgr->plugins;
-
-  while (l)
-    {
-      MutterPlugin      *plugin = l->data;
-      MutterPluginClass *klass = MUTTER_PLUGIN_GET_CLASS (plugin);
-
-      if (klass->xevent_filter)
-        {
-          if (klass->xevent_filter (plugin, xev) == TRUE)
-            return TRUE;
-        }
-
-      l = l->next;
-    }
-
-  return FALSE;
-}

src/compositor/mutter/mutter-plugin-manager.h

@@ -1,63 +0,0 @@
-/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
-
-/*
- * Copyright (c) 2008 Intel Corp.
- *
- * Author: Tomas Frydrych <tf@linux.intel.com>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of the
- * License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
- * 02111-1307, USA.
- */
-
-#ifndef MUTTER_PLUGIN_MANAGER_H_
-#define MUTTER_PLUGIN_MANAGER_H_
-
-#include "types.h"
-#include "screen.h"
-
-#define  MUTTER_PLUGIN_FROM_MANAGER_
-#include "mutter-plugin.h"
-#undef   MUTTER_PLUGIN_FROM_MANAGER_
-
-typedef struct MutterPluginManager MutterPluginManager;
-
-MutterPluginManager * mutter_plugin_manager_new (MetaScreen *screen);
-gboolean mutter_plugin_manager_load (MutterPluginManager *mgr);
-gboolean mutter_plugin_manager_initialize (MutterPluginManager *plugin_mgr);
-gboolean mutter_plugin_manager_event_simple (MutterPluginManager *mgr,
-					     MutterWindow  *actor,
-					     unsigned long    event);
-
-gboolean mutter_plugin_manager_event_maximize (MutterPluginManager *mgr,
-					       MutterWindow  *actor,
-					       unsigned long    event,
-					       gint             target_x,
-					       gint             target_y,
-					       gint             target_width,
-					       gint		target_height);
-void mutter_plugin_manager_update_workspaces (MutterPluginManager *mgr);
-
-void mutter_plugin_manager_update_workspace (MutterPluginManager *mgr, MetaWorkspace *w);
-
-gboolean mutter_plugin_manager_switch_workspace (MutterPluginManager *mgr,
-						 const GList **actors,
-						 gint          from,
-						 gint          to,
-						 MetaMotionDirection direction);
-
-gboolean mutter_plugin_manager_xevent_filter (MutterPluginManager *mgr,
-					      XEvent *xev);
-
-#endif

src/compositor/mutter/mutter-plugin.c

@@ -1,484 +0,0 @@
-/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
-
-/*
- * Copyright (c) 2008 Intel Corp.
- *
- * Author: Tomas Frydrych <tf@linux.intel.com>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of the
- * License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
- * 02111-1307, USA.
- */
-
-#include "mutter-plugin.h"
-#include "screen.h"
-#include "display.h"
-
-#include <string.h>
-#include <X11/Xlib.h>
-#include <X11/extensions/Xfixes.h>
-#include <X11/extensions/shape.h>
-#include <clutter/x11/clutter-x11.h>
-
-G_DEFINE_ABSTRACT_TYPE (MutterPlugin, mutter_plugin, G_TYPE_OBJECT);
-
-#define MUTTER_PLUGIN_GET_PRIVATE(obj) \
-(G_TYPE_INSTANCE_GET_PRIVATE ((obj), MUTTER_TYPE_PLUGIN, MutterPluginPrivate))
-
-enum
-{
-  PROP_0,
-  PROP_SCREEN,
-  PROP_PARAMS,
-  PROP_FEATURES,
-  PROP_DISABLED,
-  PROP_DEBUG_MODE,
-};
-
-struct _MutterPluginPrivate
-{
-  MetaScreen   *screen;
-  gchar        *params;
-  gulong        features;
-
-  gint          running;
-
-  gboolean      disabled : 1;
-  gboolean      debug    : 1;
-};
-
-static void
-mutter_plugin_dispose (GObject *object)
-{
-  G_OBJECT_CLASS (mutter_plugin_parent_class)->dispose (object);
-}
-
-static void
-mutter_plugin_finalize (GObject *object)
-{
-  MutterPluginPrivate *priv = MUTTER_PLUGIN (object)->priv;
-
-  g_free (priv->params);
-  priv->params = NULL;
-
-  G_OBJECT_CLASS (mutter_plugin_parent_class)->finalize (object);
-}
-
-static void
-mutter_plugin_parse_params (MutterPlugin *plugin)
-{
-  char                  *p;
-  gulong                features = 0;
-  MutterPluginPrivate  *priv     = plugin->priv;
-  MutterPluginClass    *klass    = MUTTER_PLUGIN_GET_CLASS (plugin);
-
-/*
- * Feature flags: identify events that the plugin can handle; a plugin can
- * handle one or more events.
- */
-  if (klass->minimize)
-    features |= MUTTER_PLUGIN_MINIMIZE;
-
-  if (klass->maximize)
-    features |= MUTTER_PLUGIN_MAXIMIZE;
-
-  if (klass->unmaximize)
-    features |= MUTTER_PLUGIN_UNMAXIMIZE;
-
-  if (klass->map)
-    features |= MUTTER_PLUGIN_MAP;
-
-  if (klass->destroy)
-    features |= MUTTER_PLUGIN_DESTROY;
-
-  if (klass->switch_workspace)
-    features |= MUTTER_PLUGIN_SWITCH_WORKSPACE;
-
-  if (priv->params)
-    {
-      gboolean debug = FALSE;
-
-      if ((p = strstr (priv->params, "disable:")))
-        {
-          gchar *d = g_strdup (p+8);
-
-          p = strchr (d, ';');
-
-          if (p)
-            *p = 0;
-
-          if (strstr (d, "minimize"))
-            features &= ~ MUTTER_PLUGIN_MINIMIZE;
-
-          if (strstr (d, "maximize"))
-            features &= ~ MUTTER_PLUGIN_MAXIMIZE;
-
-          if (strstr (d, "unmaximize"))
-            features &= ~ MUTTER_PLUGIN_UNMAXIMIZE;
-
-          if (strstr (d, "map"))
-            features &= ~ MUTTER_PLUGIN_MAP;
-
-          if (strstr (d, "destroy"))
-            features &= ~ MUTTER_PLUGIN_DESTROY;
-
-          if (strstr (d, "switch-workspace"))
-            features &= ~MUTTER_PLUGIN_SWITCH_WORKSPACE;
-
-          g_free (d);
-        }
-
-      if (strstr (priv->params, "debug"))
-        debug = TRUE;
-
-      if (debug != priv->debug)
-        {
-          priv->debug = debug;
-
-          g_object_notify (G_OBJECT (plugin), "debug-mode");
-        }
-    }
-
-  if (features != priv->features)
-    {
-      priv->features = features;
-
-      g_object_notify (G_OBJECT (plugin), "features");
-    }
-}
-
-static void
-mutter_plugin_set_property (GObject      *object,
-			    guint         prop_id,
-			    const GValue *value,
-			    GParamSpec   *pspec)
-{
-  MutterPluginPrivate *priv = MUTTER_PLUGIN (object)->priv;
-
-  switch (prop_id)
-    {
-    case PROP_SCREEN:
-      priv->screen = g_value_get_object (value);
-      break;
-    case PROP_PARAMS:
-      priv->params = g_value_dup_string (value);
-      mutter_plugin_parse_params (MUTTER_PLUGIN (object));
-      break;
-    case PROP_DISABLED:
-      priv->disabled = g_value_get_boolean (value);
-      break;
-    case PROP_DEBUG_MODE:
-      priv->debug = g_value_get_boolean (value);
-      break;
-    default:
-      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
-      break;
-    }
-}
-
-static void
-mutter_plugin_get_property (GObject    *object,
-			    guint       prop_id,
-			    GValue     *value,
-			    GParamSpec *pspec)
-{
-  MutterPluginPrivate *priv = MUTTER_PLUGIN (object)->priv;
-
-  switch (prop_id)
-    {
-    case PROP_SCREEN:
-      g_value_set_object (value, priv->screen);
-      break;
-    case PROP_PARAMS:
-      g_value_set_string (value, priv->params);
-      break;
-    case PROP_DISABLED:
-      g_value_set_boolean (value, priv->disabled);
-      break;
-    case PROP_DEBUG_MODE:
-      g_value_set_boolean (value, priv->debug);
-      break;
-    case PROP_FEATURES:
-      g_value_set_ulong (value, priv->features);
-      break;
-    default:
-      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
-      break;
-    }
-}
-
-
-static void
-mutter_plugin_class_init (MutterPluginClass *klass)
-{
-  GObjectClass      *gobject_class = G_OBJECT_CLASS (klass);
-
-  gobject_class->finalize        = mutter_plugin_finalize;
-  gobject_class->dispose         = mutter_plugin_dispose;
-  gobject_class->set_property    = mutter_plugin_set_property;
-  gobject_class->get_property    = mutter_plugin_get_property;
-
-  g_object_class_install_property (gobject_class,
-                                   PROP_SCREEN,
-                                   g_param_spec_object ("screen",
-                                                        "MetaScreen",
-                                                        "MetaScreen",
-                                                        META_TYPE_SCREEN,
-                                                        G_PARAM_READWRITE |
-                                                      G_PARAM_CONSTRUCT_ONLY));
-
-  g_object_class_install_property (gobject_class,
-				   PROP_PARAMS,
-				   g_param_spec_string ("params",
-							"Parameters",
-							"Plugin Parameters",
-							NULL,
-							G_PARAM_READWRITE |
-                                                        G_PARAM_CONSTRUCT));
-
-  g_object_class_install_property (gobject_class,
-				   PROP_FEATURES,
-				   g_param_spec_ulong ("features",
-                                                       "Features",
-                                                       "Plugin Features",
-                                                       0 , G_MAXULONG, 0,
-                                                       G_PARAM_READABLE));
-
-  g_object_class_install_property (gobject_class,
-				   PROP_DISABLED,
-				   g_param_spec_boolean ("disabled",
-                                                      "Plugin disabled",
-                                                      "Plugin disabled",
-                                                      FALSE,
-                                                      G_PARAM_READWRITE));
-
-  g_object_class_install_property (gobject_class,
-				   PROP_DEBUG_MODE,
-				   g_param_spec_boolean ("debug-mode",
-                                                      "Debug Mode",
-                                                      "Debug Mode",
-                                                      FALSE,
-                                                      G_PARAM_READABLE));
-
-  g_type_class_add_private (gobject_class, sizeof (MutterPluginPrivate));
-}
-
-static void
-mutter_plugin_init (MutterPlugin *self)
-{
-  MutterPluginPrivate *priv;
-
-  self->priv = priv = MUTTER_PLUGIN_GET_PRIVATE (self);
-}
-
-gulong
-mutter_plugin_features (MutterPlugin *plugin)
-{
-  MutterPluginPrivate *priv = MUTTER_PLUGIN (plugin)->priv;
-
-  return priv->features;
-}
-
-gboolean
-mutter_plugin_disabled (MutterPlugin *plugin)
-{
-  MutterPluginPrivate *priv = MUTTER_PLUGIN (plugin)->priv;
-
-  return priv->disabled;
-}
-
-gboolean
-mutter_plugin_running  (MutterPlugin *plugin)
-{
-  MutterPluginPrivate *priv = MUTTER_PLUGIN (plugin)->priv;
-
-  return (priv->running > 0);
-}
-
-gboolean
-mutter_plugin_debug_mode (MutterPlugin *plugin)
-{
-  MutterPluginPrivate *priv = MUTTER_PLUGIN (plugin)->priv;
-
-  return priv->debug;
-}
-
-const MutterPluginInfo *
-mutter_plugin_get_info (MutterPlugin *plugin)
-{
-  MutterPluginClass  *klass = MUTTER_PLUGIN_GET_CLASS (plugin);
-
-  if (klass && klass->plugin_info)
-    return klass->plugin_info (plugin);
-
-  return NULL;
-}
-
-ClutterActor *
-mutter_plugin_get_overlay_group (MutterPlugin *plugin)
-{
-  MutterPluginPrivate *priv = MUTTER_PLUGIN (plugin)->priv;
-
-  return mutter_get_overlay_group_for_screen (priv->screen);
-}
-
-ClutterActor *
-mutter_plugin_get_stage (MutterPlugin *plugin)
-{
-  MutterPluginPrivate *priv = MUTTER_PLUGIN (plugin)->priv;
-
-  return mutter_get_stage_for_screen (priv->screen);
-}
-
-ClutterActor *
-mutter_plugin_get_window_group (MutterPlugin *plugin)
-{
-  MutterPluginPrivate *priv = MUTTER_PLUGIN (plugin)->priv;
-
-  return mutter_get_window_group_for_screen (priv->screen);
-}
-
-/**
- * _mutter_plugin_effect_started:
- * @plugin: the plugin
- *
- * Mark that an effect has started for the plugin. This is called
- * internally by MutterPluginManager.
- */
-void
-_mutter_plugin_effect_started (MutterPlugin *plugin)
-{
-  MutterPluginPrivate *priv = MUTTER_PLUGIN (plugin)->priv;
-
-  priv->running++;
-}
-
-void
-mutter_plugin_effect_completed (MutterPlugin *plugin,
-                                MutterWindow *actor,
-                                unsigned long event)
-{
-  MutterPluginPrivate *priv = MUTTER_PLUGIN (plugin)->priv;
-
-  if (priv->running-- < 0)
-    {
-      g_warning ("Error in running effect accounting, adjusting.");
-      priv->running = 0;
-    }
-
-  if (!actor)
-    {
-      const MutterPluginInfo *info;
-      const gchar            *name = NULL;
-
-      if (plugin && (info = mutter_plugin_get_info (plugin)))
-        name = info->name;
-
-      g_warning ("Plugin [%s] passed NULL for actor!",
-                 name ? name : "unknown");
-    }
-
-  mutter_window_effect_completed (actor, event);
-}
-
-void
-mutter_plugin_query_screen_size (MutterPlugin *plugin,
-                                 int          *width,
-                                 int          *height)
-{
-  MutterPluginPrivate *priv = MUTTER_PLUGIN (plugin)->priv;
-
-  meta_screen_get_size (priv->screen, width, height);
-}
-
-void
-mutter_plugin_set_stage_reactive (MutterPlugin *plugin,
-                                  gboolean      reactive)
-{
-  MutterPluginPrivate *priv = MUTTER_PLUGIN (plugin)->priv;
-  MetaScreen  *screen  = priv->screen;
-
-  if (reactive)
-    mutter_set_stage_input_region (screen, None);
-  else
-    mutter_empty_stage_input_region (screen);
-}
-
-void
-mutter_plugin_set_stage_input_area (MutterPlugin *plugin,
-                                    gint x, gint y, gint width, gint height)
-{
-  MutterPluginPrivate *priv = MUTTER_PLUGIN (plugin)->priv;
-  MetaScreen   *screen  = priv->screen;
-  MetaDisplay  *display = meta_screen_get_display (screen);
-  Display      *xdpy    = meta_display_get_xdisplay (display);
-  XRectangle    rect;
-  XserverRegion region;
-
-  rect.x = x;
-  rect.y = y;
-  rect.width = width;
-  rect.height = height;
-
-  region = XFixesCreateRegion (xdpy, &rect, 1);
-  mutter_set_stage_input_region (screen, region);
-  XFixesDestroyRegion (xdpy, region);
-}
-
-void
-mutter_plugin_set_stage_input_region (MutterPlugin *plugin,
-                                      XserverRegion region)
-{
-  MutterPluginPrivate *priv = MUTTER_PLUGIN (plugin)->priv;
-  MetaScreen  *screen  = priv->screen;
-
-  mutter_set_stage_input_region (screen, region);
-}
-
-GList *
-mutter_plugin_get_windows (MutterPlugin *plugin)
-{
-  MutterPluginPrivate *priv = MUTTER_PLUGIN (plugin)->priv;
-
-  return mutter_get_windows (priv->screen);
-}
-
-Display *
-mutter_plugin_get_xdisplay (MutterPlugin *plugin)
-{
-  MutterPluginPrivate *priv    = MUTTER_PLUGIN (plugin)->priv;
-  MetaDisplay         *display = meta_screen_get_display (priv->screen);
-  Display             *xdpy    = meta_display_get_xdisplay (display);
-
-  return xdpy;
-}
-
-/**
- * mutter_plugin_get_screen:
- * @plugin: a #MutterPlugin
- *
- * Gets the #MetaScreen corresponding to a plugin. Each plugin instance
- * is associated with exactly one screen; if Metacity is managing
- * multiple screens, multiple plugin instances will be created.
- *
- * Return value: (transfer none): the #MetaScreen for the plugin
- */
-MetaScreen *
-mutter_plugin_get_screen (MutterPlugin *plugin)
-{
-  MutterPluginPrivate *priv = MUTTER_PLUGIN (plugin)->priv;
-
-  return priv->screen;
-}
-

src/compositor/mutter/mutter-shaped-texture.c

@@ -1,428 +0,0 @@
-/*
- * shaped texture
- *
- * An actor to draw a texture clipped to a list of rectangles
- *
- * Authored By Neil Roberts  <neil@linux.intel.com>
- *
- * Copyright (C) 2008 Intel Corporation
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of the
- * License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
- * 02111-1307, USA.
- */
-
-#include <config.h>
-
-#include "mutter-shaped-texture.h"
-
-#include <clutter/clutter.h>
-#include <cogl/cogl.h>
-#include <string.h>
-
-
-static void mutter_shaped_texture_dispose (GObject *object);
-static void mutter_shaped_texture_finalize (GObject *object);
-
-static void mutter_shaped_texture_paint (ClutterActor *actor);
-static void mutter_shaped_texture_pick (ClutterActor *actor,
-					const ClutterColor *color);
-
-static void mutter_shaped_texture_dirty_mask (MutterShapedTexture *stex);
-
-#ifdef HAVE_GLX_TEXTURE_PIXMAP
-G_DEFINE_TYPE (MutterShapedTexture, mutter_shaped_texture,
-               CLUTTER_GLX_TYPE_TEXTURE_PIXMAP);
-#else /* HAVE_GLX_TEXTURE_PIXMAP */
-G_DEFINE_TYPE (MutterShapedTexture, mutter_shaped_texture,
-               CLUTTER_X11_TYPE_TEXTURE_PIXMAP);
-#endif /* HAVE_GLX_TEXTURE_PIXMAP */
-
-#define MUTTER_SHAPED_TEXTURE_GET_PRIVATE(obj) \
-  (G_TYPE_INSTANCE_GET_PRIVATE ((obj), MUTTER_TYPE_SHAPED_TEXTURE, \
-                                MutterShapedTexturePrivate))
-
-struct _MutterShapedTexturePrivate
-{
-  CoglHandle mask_texture;
-  CoglHandle material;
-#if 1 /* see workaround comment in mutter_shaped_texture_paint */
-  CoglHandle material_workaround;
-#endif
-
-  guint mask_width, mask_height;
-
-  GArray *rectangles;
-};
-
-static void
-mutter_shaped_texture_class_init (MutterShapedTextureClass *klass)
-{
-  GObjectClass *gobject_class = (GObjectClass *) klass;
-  ClutterActorClass *actor_class = (ClutterActorClass *) klass;
-
-  gobject_class->dispose = mutter_shaped_texture_dispose;
-  gobject_class->finalize = mutter_shaped_texture_finalize;
-
-  actor_class->paint = mutter_shaped_texture_paint;
-  actor_class->pick = mutter_shaped_texture_pick;
-
-  g_type_class_add_private (klass, sizeof (MutterShapedTexturePrivate));
-}
-
-static void
-mutter_shaped_texture_init (MutterShapedTexture *self)
-{
-  MutterShapedTexturePrivate *priv;
-
-  priv = self->priv = MUTTER_SHAPED_TEXTURE_GET_PRIVATE (self);
-
-  priv->rectangles = g_array_new (FALSE, FALSE, sizeof (XRectangle));
-
-  priv->mask_texture = COGL_INVALID_HANDLE;
-}
-
-static void
-mutter_shaped_texture_dispose (GObject *object)
-{
-  MutterShapedTexture *self = (MutterShapedTexture *) object;
-  MutterShapedTexturePrivate *priv = self->priv;
-
-  mutter_shaped_texture_dirty_mask (self);
-
-  if (priv->material != COGL_INVALID_HANDLE)
-    {
-      cogl_material_unref (priv->material);
-      priv->material = COGL_INVALID_HANDLE;
-    }
-#if 1 /* see comment in mutter_shaped_texture_paint */
-  if (priv->material_workaround != COGL_INVALID_HANDLE)
-    {
-      cogl_material_unref (priv->material_workaround);
-      priv->material_workaround = COGL_INVALID_HANDLE;
-    }
-#endif
-
-  G_OBJECT_CLASS (mutter_shaped_texture_parent_class)->dispose (object);
-}
-
-static void
-mutter_shaped_texture_finalize (GObject *object)
-{
-  MutterShapedTexture *self = (MutterShapedTexture *) object;
-  MutterShapedTexturePrivate *priv = self->priv;
-
-  g_array_free (priv->rectangles, TRUE);
-
-  G_OBJECT_CLASS (mutter_shaped_texture_parent_class)->finalize (object);
-}
-
-static void
-mutter_shaped_texture_dirty_mask (MutterShapedTexture *stex)
-{
-  MutterShapedTexturePrivate *priv = stex->priv;
-
-  if (priv->mask_texture != COGL_INVALID_HANDLE)
-    {
-      GLuint mask_gl_tex;
-      GLenum mask_gl_target;
-
-      cogl_texture_get_gl_texture (priv->mask_texture,
-                                   &mask_gl_tex, &mask_gl_target);
-
-      if (mask_gl_target == CGL_TEXTURE_RECTANGLE_ARB)
-        glDeleteTextures (1, &mask_gl_tex);
-
-      cogl_texture_unref (priv->mask_texture);
-      priv->mask_texture = COGL_INVALID_HANDLE;
-    }
-}
-
-static void
-mutter_shaped_texture_ensure_mask (MutterShapedTexture *stex)
-{
-  MutterShapedTexturePrivate *priv = stex->priv;
-  CoglHandle paint_tex;
-  guint tex_width, tex_height;
-
-  paint_tex = clutter_texture_get_cogl_texture (CLUTTER_TEXTURE (stex));
-
-  if (paint_tex == COGL_INVALID_HANDLE)
-    return;
-
-  tex_width = cogl_texture_get_width (paint_tex);
-  tex_height = cogl_texture_get_height (paint_tex);
-
-  /* If the mask texture we have was created for a different size then
-     recreate it */
-  if (priv->mask_texture != COGL_INVALID_HANDLE
-      && (priv->mask_width != tex_width || priv->mask_height != tex_height))
-    mutter_shaped_texture_dirty_mask (stex);
-
-  /* If we don't have a mask texture yet then create one */
-  if (priv->mask_texture == COGL_INVALID_HANDLE)
-    {
-      guchar *mask_data;
-      const XRectangle *rect;
-      GLenum paint_gl_target;
-
-      /* Create data for an empty image */
-      mask_data = g_malloc0 (tex_width * tex_height);
-
-      /* Cut out a hole for each rectangle */
-      for (rect = (XRectangle *) priv->rectangles->data
-             + priv->rectangles->len;
-           rect-- > (XRectangle *) priv->rectangles->data;)
-        {
-          gint x1 = rect->x, x2 = x1 + rect->width;
-          gint y1 = rect->y, y2 = y1 + rect->height;
-          guchar *p;
-
-          /* Clip the rectangle to the size of the texture */
-          x1 = CLAMP (x1, 0, (gint) tex_width - 1);
-          x2 = CLAMP (x2, x1, (gint) tex_width);
-          y1 = CLAMP (y1, 0, (gint) tex_height - 1);
-          y2 = CLAMP (y2, y1, (gint) tex_height);
-
-          /* Fill the rectangle */
-          for (p = mask_data + y1 * tex_width + x1;
-               y1 < y2;
-               y1++, p += tex_width)
-            memset (p, 255, x2 - x1);
-        }
-
-      cogl_texture_get_gl_texture (paint_tex, NULL, &paint_gl_target);
-
-      if (paint_gl_target == CGL_TEXTURE_RECTANGLE_ARB)
-        {
-          GLuint tex;
-
-          glGenTextures (1, &tex);
-          glBindTexture (CGL_TEXTURE_RECTANGLE_ARB, tex);
-          glPixelStorei (GL_UNPACK_ROW_LENGTH, tex_width);
-          glPixelStorei (GL_UNPACK_ALIGNMENT, 1);
-          glPixelStorei (GL_UNPACK_SKIP_ROWS, 0);
-          glPixelStorei (GL_UNPACK_SKIP_PIXELS, 0);
-          glTexImage2D (CGL_TEXTURE_RECTANGLE_ARB, 0,
-                        GL_ALPHA, tex_width, tex_height,
-                        0, GL_ALPHA, GL_UNSIGNED_BYTE, mask_data);
-
-          priv->mask_texture
-            = cogl_texture_new_from_foreign (tex,
-                                             CGL_TEXTURE_RECTANGLE_ARB,
-                                             tex_width, tex_height,
-                                             0, 0,
-                                             COGL_PIXEL_FORMAT_A_8);
-        }
-      else
-        priv->mask_texture = cogl_texture_new_from_data (tex_width, tex_height,
-                                                         COGL_TEXTURE_NONE,
-                                                         COGL_PIXEL_FORMAT_A_8,
-                                                         COGL_PIXEL_FORMAT_ANY,
-                                                         tex_width,
-                                                         mask_data);
-
-      g_free (mask_data);
-
-      priv->mask_width = tex_width;
-      priv->mask_height = tex_height;
-    }
-}
-
-static void
-mutter_shaped_texture_paint (ClutterActor *actor)
-{
-  MutterShapedTexture *stex = (MutterShapedTexture *) actor;
-  MutterShapedTexturePrivate *priv = stex->priv;
-  CoglHandle paint_tex;
-  guint tex_width, tex_height;
-  ClutterActorBox alloc;
-  CoglHandle material;
-#if 1 /* please see comment below about workaround */
-  guint depth;
-#endif
-
-  if (!CLUTTER_ACTOR_IS_REALIZED (CLUTTER_ACTOR (stex)))
-    clutter_actor_realize (CLUTTER_ACTOR (stex));
-
-  paint_tex = clutter_texture_get_cogl_texture (CLUTTER_TEXTURE (stex));
-
-  tex_width = cogl_texture_get_width (paint_tex);
-  tex_height = cogl_texture_get_height (paint_tex);
-
-  if (tex_width == 0 || tex_width == 0) /* no contents yet */
-    return;
-
-  /* If there are no rectangles fallback to the regular paint
-     method */
-  if (priv->rectangles->len < 1)
-    {
-      CLUTTER_ACTOR_CLASS (mutter_shaped_texture_parent_class)
-        ->paint (actor);
-      return;
-    }
-
-  if (paint_tex == COGL_INVALID_HANDLE)
-    return;
-
-  mutter_shaped_texture_ensure_mask (stex);
-
-  if (priv->material == COGL_INVALID_HANDLE)
-    {
-      priv->material = cogl_material_new ();
-
-      cogl_material_set_layer_combine (priv->material, 1,
-				       "RGBA = MODULATE (PREVIOUS, TEXTURE[A])",
-				       NULL);
-    }
-  material = priv->material;
-
-#if 1
-  /* This was added as a workaround. It seems that with the intel
-   * drivers when multi-texturing using an RGB TFP texture, the
-   * texture is actually setup internally as an RGBA texture, where
-   * the alpha channel is mostly 0.0 so you only see a shimmer of the
-   * window. This workaround forcibly defines the alpha channel as
-   * 1.0. Maybe there is some clutter/cogl state that is interacting
-   * with this that is being overlooked, but for now this seems to
-   * work. */
-  g_object_get (stex, "pixmap-depth", &depth, NULL);
-  if (depth == 24)
-    {
-      if (priv->material_workaround == COGL_INVALID_HANDLE)
-        {
-          material = priv->material_workaround = cogl_material_new ();
-
-	  cogl_material_set_layer_combine (material, 0,
-					   "RGB = MODULATE (TEXTURE, PREVIOUS)"
-					   "A = REPLACE (PREVIOUS)",
-					   NULL);
-	  cogl_material_set_layer_combine (material, 1,
-					   "RGBA = MODULATE (PREVIOUS, TEXTURE[A])",
-					   NULL);
-        }
-
-      material = priv->material_workaround;
-    }
-#endif
-
-  cogl_material_set_layer (material, 0, paint_tex);
-  cogl_material_set_layer (material, 1, priv->mask_texture);
-
-  {
-    CoglColor color;
-    guchar opacity = clutter_actor_get_paint_opacity (actor);
-    cogl_color_set_from_4ub (&color, opacity, opacity, opacity, opacity);
-    cogl_material_set_color (material, &color);
-  }
-
-  cogl_set_source (material);
-
-  clutter_actor_get_allocation_box (actor, &alloc);
-  cogl_rectangle (0, 0,
-                  alloc.x2 - alloc.x1,
-                  alloc.y2 - alloc.y1);
-}
-
-static void
-mutter_shaped_texture_pick (ClutterActor *actor,
-			    const ClutterColor *color)
-{
-  MutterShapedTexture *stex = (MutterShapedTexture *) actor;
-  MutterShapedTexturePrivate *priv = stex->priv;
-
-  /* If there are no rectangles then use the regular pick */
-  if (priv->rectangles->len < 1)
-    CLUTTER_ACTOR_CLASS (mutter_shaped_texture_parent_class)
-      ->pick (actor, color);
-  else if (clutter_actor_should_pick_paint (actor))
-    {
-      CoglHandle paint_tex;
-      ClutterActorBox alloc;
-      guint tex_width, tex_height;
-
-      paint_tex = clutter_texture_get_cogl_texture (CLUTTER_TEXTURE (stex));
-
-      if (paint_tex == COGL_INVALID_HANDLE)
-        return;
-
-      tex_width = cogl_texture_get_width (paint_tex);
-      tex_height = cogl_texture_get_height (paint_tex);
-
-      if (tex_width == 0 || tex_width == 0) /* no contents yet */
-	return;
-
-      mutter_shaped_texture_ensure_mask (stex);
-
-      cogl_set_source_color4ub (color->red, color->green, color->blue,
-                                 color->alpha);
-
-      clutter_actor_get_allocation_box (actor, &alloc);
-
-      /* Paint the mask rectangle in the given color */
-      cogl_set_source_texture (priv->mask_texture);
-      cogl_rectangle_with_texture_coords (0, 0,
-                                          alloc.x2 - alloc.x1,
-                                          alloc.y2 - alloc.y1,
-                                          0, 0, 1, 1);
-    }
-}
-
-ClutterActor *
-mutter_shaped_texture_new (void)
-{
-  ClutterActor *self = g_object_new (MUTTER_TYPE_SHAPED_TEXTURE, NULL);
-
-  return self;
-}
-
-void
-mutter_shaped_texture_clear_rectangles (MutterShapedTexture *stex)
-{
-  MutterShapedTexturePrivate *priv;
-
-  g_return_if_fail (MUTTER_IS_SHAPED_TEXTURE (stex));
-
-  priv = stex->priv;
-
-  g_array_set_size (priv->rectangles, 0);
-  mutter_shaped_texture_dirty_mask (stex);
-  clutter_actor_queue_redraw (CLUTTER_ACTOR (stex));
-}
-
-void
-mutter_shaped_texture_add_rectangle (MutterShapedTexture *stex,
-				     const XRectangle *rect)
-{
-  g_return_if_fail (MUTTER_IS_SHAPED_TEXTURE (stex));
-
-  mutter_shaped_texture_add_rectangles (stex, 1, rect);
-}
-
-void
-mutter_shaped_texture_add_rectangles (MutterShapedTexture *stex,
-				      size_t num_rects,
-				      const XRectangle *rects)
-{
-  MutterShapedTexturePrivate *priv;
-
-  g_return_if_fail (MUTTER_IS_SHAPED_TEXTURE (stex));
-
-  priv = stex->priv;
-
-  g_array_append_vals (priv->rectangles, rects, num_rects);
-
-  mutter_shaped_texture_dirty_mask (stex);
-  clutter_actor_queue_redraw (CLUTTER_ACTOR (stex));
-}

src/compositor/mutter/mutter-shaped-texture.h

@@ -1,95 +0,0 @@
-/*
- * shaped texture
- *
- * An actor to draw a texture clipped to a list of rectangles
- *
- * Authored By Neil Roberts  <neil@linux.intel.com>
- *
- * Copyright (C) 2008 Intel Corporation
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of the
- * License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
- * 02111-1307, USA.
- */
-
-#ifndef __MUTTER_SHAPED_TEXTURE_H__
-#define __MUTTER_SHAPED_TEXTURE_H__
-
-#include <clutter/clutter.h>
-#ifdef HAVE_GLX_TEXTURE_PIXMAP
-#include <clutter/glx/clutter-glx.h>
-#endif /* HAVE_GLX_TEXTURE_PIXMAP */
-
-G_BEGIN_DECLS
-
-#define MUTTER_TYPE_SHAPED_TEXTURE			    \
-  (mutter_shaped_texture_get_type())
-#define MUTTER_SHAPED_TEXTURE(obj)                          \
-  (G_TYPE_CHECK_INSTANCE_CAST ((obj),                       \
-                               MUTTER_TYPE_SHAPED_TEXTURE,  \
-                               MutterShapedTexture))
-#define MUTTER_SHAPED_TEXTURE_CLASS(klass)                  \
-  (G_TYPE_CHECK_CLASS_CAST ((klass),			    \
-                            MUTTER_TYPE_SHAPED_TEXTURE,	    \
-                            MutterShapedTextureClass))
-#define MUTTER_IS_SHAPED_TEXTURE(obj)                       \
-  (G_TYPE_CHECK_INSTANCE_TYPE ((obj),			    \
-                               MUTTER_TYPE_SHAPED_TEXTURE))
-#define MUTTER_IS_SHAPED_TEXTURE_CLASS(klass)		    \
-  (G_TYPE_CHECK_CLASS_TYPE ((klass),			    \
-                            MUTTER_TYPE_SHAPED_TEXTURE))
-#define MUTTER_SHAPED_TEXTURE_GET_CLASS(obj)                \
-  (G_TYPE_INSTANCE_GET_CLASS ((obj),                        \
-                              MUTTER_TYPE_SHAPED_TEXTURE,   \
-                              MutterShapedTextureClass))
-
-typedef struct _MutterShapedTexture        MutterShapedTexture;
-typedef struct _MutterShapedTextureClass   MutterShapedTextureClass;
-typedef struct _MutterShapedTexturePrivate MutterShapedTexturePrivate;
-
-struct _MutterShapedTextureClass
-{
-#ifdef HAVE_GLX_TEXTURE_PIXMAP
-  ClutterGLXTexturePixmapClass parent_class;
-#else
-  ClutterX11TexturePixmapClass parent_class;
-#endif
-};
-
-struct _MutterShapedTexture
-{
-#ifdef HAVE_GLX_TEXTURE_PIXMAP
-  ClutterGLXTexturePixmap parent;
-#else
-  ClutterX11TexturePixmap parent;
-#endif
-
-  MutterShapedTexturePrivate *priv;
-};
-
-GType mutter_shaped_texture_get_type (void) G_GNUC_CONST;
-
-ClutterActor *mutter_shaped_texture_new (void);
-
-void mutter_shaped_texture_clear_rectangles (MutterShapedTexture *stex);
-
-void mutter_shaped_texture_add_rectangle (MutterShapedTexture *stex,
-					  const XRectangle *rect);
-void mutter_shaped_texture_add_rectangles (MutterShapedTexture *stex,
-					   size_t num_rects,
-					   const XRectangle *rects);
-
-G_END_DECLS
-
-#endif /* __MUTTER_SHAPED_TEXTURE_H__ */

src/compositor/mutter/plugins/Makefile.am

@@ -1,22 +0,0 @@
-
-pkglibdir=@MUTTER_PLUGIN_DIR@
-
-if WITH_CLUTTER
-
-INCLUDES=@MUTTER_CFLAGS@ -I $(top_srcdir)/src/include -DMUTTER_LIBEXECDIR=\"$(libexecdir)\" -DHOST_ALIAS=\"@HOST_ALIAS@\" -DMUTTER_LOCALEDIR=\"$(prefix)/@DATADIRNAME@/locale\" -DMUTTER_PKGDATADIR=\"$(pkgdatadir)\" -DMUTTER_DATADIR=\"$(datadir)\" -DG_LOG_DOMAIN=\"mutter\" -DSN_API_NOT_YET_FROZEN=1 -DMUTTER_MAJOR_VERSION=$(MUTTER_MAJOR_VERSION) -DMUTTER_MINOR_VERSION=$(MUTTER_MINOR_VERSION) -DMUTTER_MICRO_VERSION=$(MUTTER_MICRO_VERSION) -DMUTTER_PLUGIN_API_VERSION=$(MUTTER_PLUGIN_API_VERSION) -DMUTTER_PLUGIN_DIR=\"@MUTTER_PLUGIN_DIR@\"
-
-default_la_CFLAGS   = -fPIC
-default_la_SOURCES  = default.c
-default_la_LDFLAGS  = -module -avoid-version -no-undefined
-default_la_LIBADD   = @CLUTTER_LIBS@
-
-pkglib_LTLIBRARIES = default.la
-
-# post-install hook to remove the .la and .a files we are not interested in
-# (There is no way to stop libtool generating static libs locally, and we
-# cannot do this globally because of libmutter-private.so).
-install-exec-hook:
-	-rm $(DESTDIR)$(pkglibdir)/*.a
-	-rm $(DESTDIR)$(pkglibdir)/*.la
-
-endif

src/compositor/mutter/plugins/README

@@ -1,41 +0,0 @@
-
-Plugins implement effects associated with WM events, such as window map,
-minimizing, maximizing, unmaximizing, destruction and workspace switching. The
-plugin API is documented in src/include/compositor-clutter-plugin.h; in
-addition the simple plugin can be used as a reference implementation.
-
-The API is intended to be generic, exposing no implementation details of the WM
-to the plugins; this will facilitate reuse without modification with another WM
-(there are plans to use the same plugin API with Matchbox 2).
-
-Multiple plugins can implement the same effect and be loaded at the same time;
-however, stacking arbitrary effects in this way might not work as expected;
-this is particularly true of more complex effects, such as those for workspace
-switching.
-
-Plugins are installed in ${prefix}/lib/metacity/plugins/clutter; from there the
-WM will load plugins listed in the clutter_plugins key in the Metacity gconf
-general preferences group. Each entry in preferences has the format
-
-  'name: optional parameters'
-
-where 'name' is the name of the library without the .so suffix.
-
-As noted above, additional parameters can be passed to the plugin via the
-preference key. In such case, the plugin name is immediately followed by a
-colon, separating it from the parameters. Two common parameters should be
-handled by all plugins:
-
-  'debug'   indicates that the plugin is run in a debug mode (what exactly that
-            means is left to the plugin to determine).
-
-  'disable' parameter indicates which effects within the plugin should be
-            disabled; the format of the disable parameter is
-
-              'disable: effect1[, effect2];'
-
-            where effect1, etc., matches the effects listed in the
-            compositor-clutter-plugin.h file (currently one of 'map', 'destroy',
-            'maximize', 'unmaximize', 'switch-workspace'). Example 'disable:
-            minimize, maximize;'.
-

src/compositor/mutter/tidy/tidy-texture-frame.c

@@ -1,610 +0,0 @@
-/* tidy-texture-frame.h: Expandible texture actor
- *
- * Copyright (C) 2007 OpenedHand
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library 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
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 02111-1307, USA.
- */
-
-/**
- * SECTION:tidy-texture-frame
- * @short_description: Stretch a texture to fit the entire allocation
- *
- * #TidyTextureFrame
- *
- */
-
-#include <cogl/cogl.h>
-
-#include "tidy-texture-frame.h"
-
-#define TIDY_PARAM_READABLE     \
-        (G_PARAM_READABLE |     \
-         G_PARAM_STATIC_NICK | G_PARAM_STATIC_NAME | G_PARAM_STATIC_BLURB)
-
-#define TIDY_PARAM_READWRITE    \
-        (G_PARAM_READABLE | G_PARAM_WRITABLE | \
-         G_PARAM_STATIC_NICK | G_PARAM_STATIC_NAME | G_PARAM_STATIC_BLURB)
-
-enum
-{
-  PROP_0,
-
-  PROP_PARENT_TEXTURE,
-
-  PROP_LEFT,
-  PROP_TOP,
-  PROP_RIGHT,
-  PROP_BOTTOM
-};
-
-G_DEFINE_TYPE (TidyTextureFrame, tidy_texture_frame, CLUTTER_TYPE_ACTOR);
-
-#define TIDY_TEXTURE_FRAME_GET_PRIVATE(obj)     (G_TYPE_INSTANCE_GET_PRIVATE ((obj), TIDY_TYPE_TEXTURE_FRAME, TidyTextureFramePrivate))
-
-struct _TidyTextureFramePrivate
-{
-  ClutterTexture *parent_texture;
-
-  gfloat left;
-  gfloat top;
-  gfloat right;
-  gfloat bottom;
-
-  CoglHandle material;
-};
-
-static void
-tidy_texture_frame_get_preferred_width (ClutterActor *self,
-                                        gfloat        for_height,
-                                        gfloat       *min_width_p,
-                                        gfloat       *natural_width_p)
-{
-  TidyTextureFramePrivate *priv = TIDY_TEXTURE_FRAME (self)->priv;
-
-  if (G_UNLIKELY (priv->parent_texture == NULL))
-    {
-      if (min_width_p)
-        *min_width_p = 0;
-
-      if (natural_width_p)
-        *natural_width_p = 0;
-    }
-  else
-    {
-      ClutterActorClass *klass;
-
-      /* by directly querying the parent texture's class implementation
-       * we are going around any override mechanism the parent texture
-       * might have in place, and we ask directly for the original
-       * preferred width
-       */
-      klass = CLUTTER_ACTOR_GET_CLASS (priv->parent_texture);
-      klass->get_preferred_width (CLUTTER_ACTOR (priv->parent_texture),
-                                  for_height,
-                                  min_width_p,
-                                  natural_width_p);
-    }
-}
-
-static void
-tidy_texture_frame_get_preferred_height (ClutterActor *self,
-                                         gfloat        for_width,
-                                         gfloat       *min_height_p,
-                                         gfloat       *natural_height_p)
-{
-  TidyTextureFramePrivate *priv = TIDY_TEXTURE_FRAME (self)->priv;
-
-  if (G_UNLIKELY (priv->parent_texture == NULL))
-    {
-      if (min_height_p)
-        *min_height_p = 0;
-
-      if (natural_height_p)
-        *natural_height_p = 0;
-    }
-  else
-    {
-      ClutterActorClass *klass;
-
-      /* by directly querying the parent texture's class implementation
-       * we are going around any override mechanism the parent texture
-       * might have in place, and we ask directly for the original
-       * preferred height
-       */
-      klass = CLUTTER_ACTOR_GET_CLASS (priv->parent_texture);
-      klass->get_preferred_height (CLUTTER_ACTOR (priv->parent_texture),
-                                   for_width,
-                                   min_height_p,
-                                   natural_height_p);
-    }
-}
-
-static void
-tidy_texture_frame_realize (ClutterActor *self)
-{
-  TidyTextureFramePrivate *priv = TIDY_TEXTURE_FRAME (self)->priv;
-
-  if (priv->material != COGL_INVALID_HANDLE)
-    return;
-
-  priv->material = cogl_material_new ();
-
-  CLUTTER_ACTOR_SET_FLAGS (self, CLUTTER_ACTOR_REALIZED);
-}
-
-static void
-tidy_texture_frame_unrealize (ClutterActor *self)
-{
-  TidyTextureFramePrivate *priv = TIDY_TEXTURE_FRAME (self)->priv;
-
-  if (priv->material == COGL_INVALID_HANDLE)
-    return;
-
-  cogl_material_unref (priv->material);
-  priv->material = COGL_INVALID_HANDLE;
-
-  CLUTTER_ACTOR_UNSET_FLAGS (self, CLUTTER_ACTOR_REALIZED);
-}
-
-static void
-tidy_texture_frame_paint (ClutterActor *self)
-{
-  TidyTextureFramePrivate *priv = TIDY_TEXTURE_FRAME (self)->priv;
-  CoglHandle cogl_texture = COGL_INVALID_HANDLE;
-  ClutterActorBox box = { 0, };
-  gfloat width, height;
-  gfloat tex_width, tex_height;
-  gfloat ex, ey;
-  gfloat tx1, ty1, tx2, ty2;
-  guint8 opacity;
-
-  /* no need to paint stuff if we don't have a texture */
-  if (G_UNLIKELY (priv->parent_texture == NULL))
-    return;
-
-  /* parent texture may have been hidden, so need to make sure it gets
-   * realized
-   */
-  if (!CLUTTER_ACTOR_IS_REALIZED (priv->parent_texture))
-    clutter_actor_realize (CLUTTER_ACTOR (priv->parent_texture));
-
-  cogl_texture = clutter_texture_get_cogl_texture (priv->parent_texture);
-  if (cogl_texture == COGL_INVALID_HANDLE)
-    return;
-
-  tex_width  = cogl_texture_get_width (cogl_texture);
-  tex_height = cogl_texture_get_height (cogl_texture);
-
-  clutter_actor_get_allocation_box (self, &box);
-  width = box.x2 - box.x1;
-  height = box.y2 - box.y1;
-
-  tx1 = priv->left / tex_width;
-  tx2 = (tex_width - priv->right) / tex_width;
-  ty1 = priv->top / tex_height;
-  ty2 = (tex_height - priv->bottom) / tex_height;
-
-  ex = width - priv->right;
-  if (ex < 0)
-    ex = priv->right; 		/* FIXME ? */
-
-  ey = height - priv->bottom;
-  if (ey < 0)
-    ey = priv->bottom; 		/* FIXME ? */
-
-  opacity = clutter_actor_get_paint_opacity (self);
-
-  g_assert (priv->material != COGL_INVALID_HANDLE);
-
-  /* set the source material using the parent texture's COGL handle */
-  cogl_material_set_color4ub (priv->material, opacity, opacity, opacity, opacity);
-  cogl_material_set_layer (priv->material, 0, cogl_texture);
-  cogl_set_source (priv->material);
-
-  /* top left corner */
-  cogl_rectangle_with_texture_coords (0, 0, priv->left, priv->top,
-                                      0.0, 0.0,
-                                      tx1, ty1);
-
-  /* top middle */
-  cogl_rectangle_with_texture_coords (priv->left, 0, ex, priv->top,
-                                      tx1, 0.0,
-                                      tx2, ty1);
-
-  /* top right */
-  cogl_rectangle_with_texture_coords (ex, 0, width, priv->top,
-                                      tx2, 0.0,
-                                      1.0, ty1);
-
-  /* mid left */
-  cogl_rectangle_with_texture_coords (0, priv->top, priv->left, ey,
-                                      0.0, ty1,
-                                      tx1, ty2);
-
-  /* center */
-  cogl_rectangle_with_texture_coords (priv->left, priv->top, ex, ey,
-                                      tx1, ty1,
-                                      tx2, ty2);
-
-  /* mid right */
-  cogl_rectangle_with_texture_coords (ex, priv->top, width, ey,
-                                      tx2, ty1,
-                                      1.0, ty2);
-  
-  /* bottom left */
-  cogl_rectangle_with_texture_coords (0, ey, priv->left, height,
-                                      0.0, ty2,
-                                      tx1, 1.0);
-
-  /* bottom center */
-  cogl_rectangle_with_texture_coords (priv->left, ey, ex, height,
-                                      tx1, ty2,
-                                      tx2, 1.0);
-
-  /* bottom right */
-  cogl_rectangle_with_texture_coords (ex, ey, width, height,
-                                      tx2, ty2,
-                                      1.0, 1.0);
-}
-
-static inline void
-tidy_texture_frame_set_frame_internal (TidyTextureFrame *frame,
-                                       gfloat            left,
-                                       gfloat            top,
-                                       gfloat            right,
-                                       gfloat            bottom)
-{
-  TidyTextureFramePrivate *priv = frame->priv;
-  GObject *gobject = G_OBJECT (frame);
-  gboolean changed = FALSE;
-
-  g_object_freeze_notify (gobject);
-
-  if (priv->top != top)
-    {
-      priv->top = top;
-      g_object_notify (gobject, "top");
-      changed = TRUE;
-    }
-
-  if (priv->right != right)
-    {
-      priv->right = right;
-      g_object_notify (gobject, "right");
-      changed = TRUE;
-    }
-
-  if (priv->bottom != bottom)
-    {
-      priv->bottom = bottom;
-      g_object_notify (gobject, "bottom");
-      changed = TRUE;
-    }
-
-  if (priv->left != left)
-    {
-      priv->left = left;
-      g_object_notify (gobject, "left");
-      changed = TRUE;
-    }
-
-  if (changed && CLUTTER_ACTOR_IS_VISIBLE (frame))
-    clutter_actor_queue_redraw (CLUTTER_ACTOR (frame));
-
-  g_object_thaw_notify (gobject);
-}
-
-static void
-tidy_texture_frame_set_property (GObject      *gobject,
-                                 guint         prop_id,
-                                 const GValue *value,
-                                 GParamSpec   *pspec)
-{
-  TidyTextureFrame *frame = TIDY_TEXTURE_FRAME (gobject);
-  TidyTextureFramePrivate *priv = frame->priv;
-
-  switch (prop_id)
-    {
-    case PROP_PARENT_TEXTURE:
-      tidy_texture_frame_set_parent_texture (frame,
-                                             g_value_get_object (value));
-      break;
-
-    case PROP_TOP:
-      tidy_texture_frame_set_frame_internal (frame,
-                                             priv->left,
-                                             g_value_get_float (value),
-                                             priv->right,
-                                             priv->bottom);
-      break;
-
-    case PROP_RIGHT:
-      tidy_texture_frame_set_frame_internal (frame,
-                                             priv->top,
-                                             g_value_get_float (value),
-                                             priv->bottom,
-                                             priv->left);
-      break;
-
-    case PROP_BOTTOM:
-      tidy_texture_frame_set_frame_internal (frame,
-                                             priv->top,
-                                             priv->right,
-                                             g_value_get_float (value),
-                                             priv->left);
-      break;
-
-    case PROP_LEFT:
-      tidy_texture_frame_set_frame_internal (frame,
-                                             priv->top,
-                                             priv->right,
-                                             priv->bottom,
-                                             g_value_get_float (value));
-      break;
-
-    default:
-      G_OBJECT_WARN_INVALID_PROPERTY_ID (gobject, prop_id, pspec);
-      break;
-    }
-}
-
-static void
-tidy_texture_frame_get_property (GObject    *gobject,
-                                 guint       prop_id,
-                                 GValue     *value,
-                                 GParamSpec *pspec)
-{
-  TidyTextureFramePrivate *priv = TIDY_TEXTURE_FRAME (gobject)->priv;
-
-  switch (prop_id)
-    {
-    case PROP_PARENT_TEXTURE:
-      g_value_set_object (value, priv->parent_texture);
-      break;
-
-    case PROP_LEFT:
-      g_value_set_float (value, priv->left);
-      break;
-
-    case PROP_TOP:
-      g_value_set_float (value, priv->top);
-      break;
-
-    case PROP_RIGHT:
-      g_value_set_float (value, priv->right);
-      break;
-
-    case PROP_BOTTOM:
-      g_value_set_float (value, priv->bottom);
-      break;
-
-    default:
-      G_OBJECT_WARN_INVALID_PROPERTY_ID (gobject, prop_id, pspec);
-      break;
-    }
-}
-
-static void
-tidy_texture_frame_dispose (GObject *gobject)
-{
-  TidyTextureFramePrivate *priv = TIDY_TEXTURE_FRAME (gobject)->priv;
-
-  if (priv->parent_texture)
-    {
-      g_object_unref (priv->parent_texture);
-      priv->parent_texture = NULL;
-    }
-
-  if (priv->material)
-    {
-      cogl_material_unref (priv->material);
-      priv->material = COGL_INVALID_HANDLE;
-    }
-
-  G_OBJECT_CLASS (tidy_texture_frame_parent_class)->dispose (gobject);
-}
-
-static void
-tidy_texture_frame_class_init (TidyTextureFrameClass *klass)
-{
-  GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
-  ClutterActorClass *actor_class = CLUTTER_ACTOR_CLASS (klass);
-  GParamSpec *pspec;
-
-  g_type_class_add_private (gobject_class, sizeof (TidyTextureFramePrivate));
-
-  actor_class->get_preferred_width =
-    tidy_texture_frame_get_preferred_width;
-  actor_class->get_preferred_height =
-    tidy_texture_frame_get_preferred_height;
-  actor_class->realize = tidy_texture_frame_realize;
-  actor_class->unrealize = tidy_texture_frame_unrealize;
-  actor_class->paint = tidy_texture_frame_paint;
-
-  gobject_class->set_property = tidy_texture_frame_set_property;
-  gobject_class->get_property = tidy_texture_frame_get_property;
-  gobject_class->dispose = tidy_texture_frame_dispose;
-
-  pspec = g_param_spec_object ("parent-texture",
-                               "Parent Texture",
-                               "The parent ClutterTexture",
-                               CLUTTER_TYPE_TEXTURE,
-                               TIDY_PARAM_READWRITE |
-                               G_PARAM_CONSTRUCT);
-  g_object_class_install_property (gobject_class, PROP_PARENT_TEXTURE, pspec);
-
-  pspec = g_param_spec_float ("left",
-                              "Left",
-                              "Left offset",
-			      0, G_MAXFLOAT,
-                              0,
-                              TIDY_PARAM_READWRITE);
-  g_object_class_install_property (gobject_class, PROP_LEFT, pspec);
-
-  pspec = g_param_spec_float ("top",
-                              "Top",
-                              "Top offset",
-                              0, G_MAXFLOAT,
-                              0,
-                              TIDY_PARAM_READWRITE);
-  g_object_class_install_property (gobject_class, PROP_TOP, pspec);
-
-  pspec = g_param_spec_float ("bottom",
-                              "Bottom",
-                              "Bottom offset",
-                              0, G_MAXFLOAT,
-                              0,
-                              TIDY_PARAM_READWRITE);
-  g_object_class_install_property (gobject_class, PROP_BOTTOM, pspec);
-
-  pspec = g_param_spec_float ("right",
-                              "Right",
-                              "Right offset",
-                              0, G_MAXFLOAT,
-                              0,
-                              TIDY_PARAM_READWRITE);
-  g_object_class_install_property (gobject_class, PROP_RIGHT, pspec);
-}
-
-static void
-tidy_texture_frame_init (TidyTextureFrame *self)
-{
-  TidyTextureFramePrivate *priv;
-
-  self->priv = priv = TIDY_TEXTURE_FRAME_GET_PRIVATE (self);
-
-  priv->material = COGL_INVALID_HANDLE;
-}
-
-/**
- * tidy_texture_frame_new:
- * @texture: a #ClutterTexture or %NULL
- * @left: left margin preserving its content
- * @top: top margin preserving its content
- * @right: right margin preserving its content
- * @bottom: bottom margin preserving its content
- *
- * A #TidyTextureFrame is a specialized texture that efficiently clones
- * an area of the given @texture while keeping preserving portions of the
- * same texture.
- *
- * A #TidyTextureFrame can be used to make a rectangular texture fit a
- * given size without stretching its borders.
- *
- * Return value: the newly created #TidyTextureFrame
- */
-ClutterActor*
-tidy_texture_frame_new (ClutterTexture *texture, 
-			gfloat          left,
-			gfloat          top,
-			gfloat          right,
-			gfloat          bottom)
-{
-  g_return_val_if_fail (texture == NULL || CLUTTER_IS_TEXTURE (texture), NULL);
-
-  return g_object_new (TIDY_TYPE_TEXTURE_FRAME,
- 		       "parent-texture", texture,
-		       "left", left,
-		       "top", top,
-		       "right", right,
-		       "bottom", bottom,
-		       NULL);
-}
-
-ClutterTexture *
-tidy_texture_frame_get_parent_texture (TidyTextureFrame *frame)
-{
-  g_return_val_if_fail (TIDY_IS_TEXTURE_FRAME (frame), NULL);
-
-  return frame->priv->parent_texture;
-}
-
-void
-tidy_texture_frame_set_parent_texture (TidyTextureFrame *frame,
-                                       ClutterTexture   *texture)
-{
-  TidyTextureFramePrivate *priv;
-  gboolean was_visible;
-
-  g_return_if_fail (TIDY_IS_TEXTURE_FRAME (frame));
-  g_return_if_fail (texture == NULL || CLUTTER_IS_TEXTURE (texture));
-
-  priv = frame->priv;
-
-  was_visible = CLUTTER_ACTOR_IS_VISIBLE (frame);
-
-  if (priv->parent_texture == texture)
-    return;
-
-  if (priv->parent_texture)
-    {
-      g_object_unref (priv->parent_texture);
-      priv->parent_texture = NULL;
-
-      if (was_visible)
-        clutter_actor_hide (CLUTTER_ACTOR (frame));
-    }
-
-  if (texture)
-    {
-      priv->parent_texture = g_object_ref (texture);
-
-      if (was_visible && CLUTTER_ACTOR_IS_VISIBLE (priv->parent_texture))
-        clutter_actor_show (CLUTTER_ACTOR (frame));
-    }
-
-  clutter_actor_queue_relayout (CLUTTER_ACTOR (frame));
-
-  g_object_notify (G_OBJECT (frame), "parent-texture");
-}
-
-void
-tidy_texture_frame_set_frame (TidyTextureFrame *frame,
-                              gfloat            top,
-                              gfloat            right,
-                              gfloat            bottom,
-                              gfloat            left)
-{
-  g_return_if_fail (TIDY_IS_TEXTURE_FRAME (frame));
-
-  tidy_texture_frame_set_frame_internal (frame, top, right, bottom, left);
-}
-
-void
-tidy_texture_frame_get_frame (TidyTextureFrame *frame,
-                              gfloat           *top,
-                              gfloat           *right,
-                              gfloat           *bottom,
-                              gfloat           *left)
-{
-  TidyTextureFramePrivate *priv;
-
-  g_return_if_fail (TIDY_IS_TEXTURE_FRAME (frame));
-
-  priv = frame->priv;
-
-  if (top)
-    *top = priv->top;
-
-  if (right)
-    *right = priv->right;
-
-  if (bottom)
-    *bottom = priv->bottom;
-
-  if (left)
-    *left = priv->left;
-}

src/compositor/mutter/tidy/tidy-texture-frame.h

@@ -1,81 +0,0 @@
-/* tidy-texture-frame.h: Expandible texture actor
- *
- * Copyright (C) 2007, 2008 OpenedHand Ltd
- * Copyright (C) 2009 Intel Corp.
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library 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
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 02111-1307, USA.
- */
-
-#ifndef _HAVE_TIDY_TEXTURE_FRAME_H
-#define _HAVE_TIDY_TEXTURE_FRAME_H
-
-#include <clutter/clutter.h>
-
-G_BEGIN_DECLS
-
-#define TIDY_TYPE_TEXTURE_FRAME                 (tidy_texture_frame_get_type ())
-#define TIDY_TEXTURE_FRAME(obj)                 (G_TYPE_CHECK_INSTANCE_CAST ((obj), TIDY_TYPE_TEXTURE_FRAME, TidyTextureFrame))
-#define TIDY_TEXTURE_FRAME_CLASS(klass)         (G_TYPE_CHECK_CLASS_CAST ((klass), TIDY_TYPE_TEXTURE_FRAME, TidyTextureFrameClass))
-#define TIDY_IS_TEXTURE_FRAME(obj)              (G_TYPE_CHECK_INSTANCE_TYPE ((obj), TIDY_TYPE_TEXTURE_FRAME))
-#define TIDY_IS_TEXTURE_FRAME_CLASS(klass)      (G_TYPE_CHECK_CLASS_TYPE ((klass), TIDY_TYPE_TEXTURE_FRAME))
-#define TIDY_TEXTURE_FRAME_GET_CLASS(obj)       (G_TYPE_INSTANCE_GET_CLASS ((obj), TIDY_TYPE_TEXTURE_FRAME, TidyTextureFrameClass))
-
-typedef struct _TidyTextureFrame                TidyTextureFrame;
-typedef struct _TidyTextureFramePrivate         TidyTextureFramePrivate;
-typedef struct _TidyTextureFrameClass           TidyTextureFrameClass;
-
-struct _TidyTextureFrame
-{
-  /*< private >*/
-  ClutterActor parent_instance;
-  
-  TidyTextureFramePrivate    *priv;
-};
-
-struct _TidyTextureFrameClass
-{
-  ClutterActorClass parent_class;
-
-  /* padding for future expansion */
-  void (*_clutter_box_1) (void);
-  void (*_clutter_box_2) (void);
-  void (*_clutter_box_3) (void);
-  void (*_clutter_box_4) (void);
-};
-
-GType           tidy_texture_frame_get_type           (void) G_GNUC_CONST;
-ClutterActor *  tidy_texture_frame_new                (ClutterTexture   *texture,
-                                                       gfloat            top,
-                                                       gfloat            right,
-                                                       gfloat            bottom,
-                                                       gfloat            left);
-void            tidy_texture_frame_set_parent_texture (TidyTextureFrame *frame,
-                                                       ClutterTexture   *texture);
-ClutterTexture *tidy_texture_frame_get_parent_texture (TidyTextureFrame *frame);
-void            tidy_texture_frame_set_frame          (TidyTextureFrame *frame,
-                                                       gfloat            top,
-                                                       gfloat            right,
-                                                       gfloat            bottom,
-                                                       gfloat            left);
-void            tidy_texture_frame_get_frame          (TidyTextureFrame *frame,
-                                                       gfloat           *top,
-                                                       gfloat           *right,
-                                                       gfloat           *bottom,
-                                                       gfloat           *left);
-
-G_END_DECLS
-
-#endif /* _HAVE_TIDY_TEXTURE_FRAME_H */

src/compositor/plugins/Makefile.am

@@ -0,0 +1,18 @@
+
+pkglibdir=@MUTTER_PLUGIN_DIR@
+
+INCLUDES=@MUTTER_CFLAGS@ -I $(top_srcdir)/src -DMUTTER_LIBEXECDIR=\"$(libexecdir)\" -DHOST_ALIAS=\"@HOST_ALIAS@\" -DMUTTER_LOCALEDIR=\"$(prefix)/@DATADIRNAME@/locale\" -DMUTTER_PKGDATADIR=\"$(pkgdatadir)\" -DMUTTER_DATADIR=\"$(datadir)\" -DG_LOG_DOMAIN=\"mutter\" -DSN_API_NOT_YET_FROZEN=1 -DMUTTER_MAJOR_VERSION=$(MUTTER_MAJOR_VERSION) -DMUTTER_MINOR_VERSION=$(MUTTER_MINOR_VERSION) -DMUTTER_MICRO_VERSION=$(MUTTER_MICRO_VERSION) -DMUTTER_PLUGIN_API_VERSION=$(MUTTER_PLUGIN_API_VERSION) -DMUTTER_PLUGIN_DIR=\"@MUTTER_PLUGIN_DIR@\"
+
+default_la_CFLAGS   = -fPIC
+default_la_SOURCES  = default.c
+default_la_LDFLAGS  = -module -avoid-version -no-undefined
+default_la_LIBADD   = @CLUTTER_LIBS@
+
+pkglib_LTLIBRARIES = default.la
+
+# post-install hook to remove the .la and .a files we are not interested in
+# (There is no way to stop libtool generating static libs locally, and we
+# cannot do this globally because of libmutter-private.so).
+install-exec-hook:
+	-rm $(DESTDIR)$(pkglibdir)/*.a
+	-rm $(DESTDIR)$(pkglibdir)/*.la

src/compositor/plugins/default.c

@@ -21,7 +21,8 @@
  * 02111-1307, USA.
  */
 
-#include "mutter-plugin.h"
+#include <meta/meta-plugin.h>
+#include <meta/window.h>
 
 #include <libintl.h>
 #define _(x) dgettext (GETTEXT_PACKAGE, x)
@@ -39,71 +40,78 @@
 
 #define ACTOR_DATA_KEY "MCCP-Default-actor-data"
 
-#define MUTTER_TYPE_DEFAULT_PLUGIN            (mutter_default_plugin_get_type ())
-#define MUTTER_DEFAULT_PLUGIN(obj)            (G_TYPE_CHECK_INSTANCE_CAST ((obj), MUTTER_TYPE_DEFAULT_PLUGIN, MutterDefaultPlugin))
-#define MUTTER_DEFAULT_PLUGIN_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST ((klass),  MUTTER_TYPE_DEFAULT_PLUGIN, MutterDefaultPluginClass))
-#define MUTTER_IS_DEFAULT_PLUGIN(obj)         (G_TYPE_CHECK_INSTANCE_TYPE ((obj), MUTTER_DEFAULT_PLUGIN_TYPE))
-#define MUTTER_IS_DEFAULT_PLUGIN_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass),  MUTTER_TYPE_DEFAULT_PLUGIN))
-#define MUTTER_DEFAULT_PLUGIN_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS ((obj),  MUTTER_TYPE_DEFAULT_PLUGIN, MutterDefaultPluginClass))
+#define META_TYPE_DEFAULT_PLUGIN            (meta_default_plugin_get_type ())
+#define META_DEFAULT_PLUGIN(obj)            (G_TYPE_CHECK_INSTANCE_CAST ((obj), META_TYPE_DEFAULT_PLUGIN, MetaDefaultPlugin))
+#define META_DEFAULT_PLUGIN_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST ((klass),  META_TYPE_DEFAULT_PLUGIN, MetaDefaultPluginClass))
+#define META_IS_DEFAULT_PLUGIN(obj)         (G_TYPE_CHECK_INSTANCE_TYPE ((obj), META_DEFAULT_PLUGIN_TYPE))
+#define META_IS_DEFAULT_PLUGIN_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass),  META_TYPE_DEFAULT_PLUGIN))
+#define META_DEFAULT_PLUGIN_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS ((obj),  META_TYPE_DEFAULT_PLUGIN, MetaDefaultPluginClass))
 
-#define MUTTER_DEFAULT_PLUGIN_GET_PRIVATE(obj) \
-(G_TYPE_INSTANCE_GET_PRIVATE ((obj), MUTTER_TYPE_DEFAULT_PLUGIN, MutterDefaultPluginPrivate))
+#define META_DEFAULT_PLUGIN_GET_PRIVATE(obj) \
+(G_TYPE_INSTANCE_GET_PRIVATE ((obj), META_TYPE_DEFAULT_PLUGIN, MetaDefaultPluginPrivate))
 
-typedef struct _MutterDefaultPlugin        MutterDefaultPlugin;
-typedef struct _MutterDefaultPluginClass   MutterDefaultPluginClass;
-typedef struct _MutterDefaultPluginPrivate MutterDefaultPluginPrivate;
+typedef struct _MetaDefaultPlugin        MetaDefaultPlugin;
+typedef struct _MetaDefaultPluginClass   MetaDefaultPluginClass;
+typedef struct _MetaDefaultPluginPrivate MetaDefaultPluginPrivate;
 
-struct _MutterDefaultPlugin
+struct _MetaDefaultPlugin
 {
-  MutterPlugin parent;
+  MetaPlugin parent;
 
-  MutterDefaultPluginPrivate *priv;
+  MetaDefaultPluginPrivate *priv;
 };
 
-struct _MutterDefaultPluginClass
+struct _MetaDefaultPluginClass
 {
-  MutterPluginClass parent_class;
+  MetaPluginClass parent_class;
 };
 
 static GQuark actor_data_quark = 0;
 
-static void     minimize   (MutterPlugin *plugin,
-                            MutterWindow *actor);
-static void     map        (MutterPlugin *plugin,
-                            MutterWindow *actor);
-static void     destroy    (MutterPlugin *plugin,
-                            MutterWindow *actor);
-static void     maximize   (MutterPlugin *plugin,
-                            MutterWindow *actor,
-                            gint x, gint y, gint width, gint height);
-static void     unmaximize (MutterPlugin *plugin,
-                            MutterWindow *actor,
-                            gint x, gint y, gint width, gint height);
+static void minimize   (MetaPlugin      *plugin,
+                        MetaWindowActor *actor);
+static void map        (MetaPlugin      *plugin,
+                        MetaWindowActor *actor);
+static void destroy    (MetaPlugin      *plugin,
+                        MetaWindowActor *actor);
+static void maximize   (MetaPlugin      *plugin,
+                        MetaWindowActor *actor,
+                        gint             x,
+                        gint             y,
+                        gint             width,
+                        gint             height);
+static void unmaximize (MetaPlugin      *plugin,
+                        MetaWindowActor *actor,
+                        gint             x,
+                        gint             y,
+                        gint             width,
+                        gint             height);
 
-static void switch_workspace (MutterPlugin *plugin,
-                              const GList **actors, gint from, gint to,
-                              MetaMotionDirection direction);
+static void switch_workspace (MetaPlugin          *plugin,
+                              gint                 from,
+                              gint                 to,
+                              MetaMotionDirection  direction);
 
-static void kill_effect (MutterPlugin *plugin,
-                         MutterWindow *actor, gulong event);
+static void kill_window_effects   (MetaPlugin      *plugin,
+                                   MetaWindowActor *actor);
+static void kill_switch_workspace (MetaPlugin      *plugin);
 
-static const MutterPluginInfo * plugin_info (MutterPlugin *plugin);
+static const MetaPluginInfo * plugin_info (MetaPlugin *plugin);
 
-MUTTER_PLUGIN_DECLARE(MutterDefaultPlugin, mutter_default_plugin);
+META_PLUGIN_DECLARE(MetaDefaultPlugin, meta_default_plugin);
 
 /*
  * Plugin private data that we store in the .plugin_private member.
  */
-struct _MutterDefaultPluginPrivate
+struct _MetaDefaultPluginPrivate
 {
   /* Valid only when switch_workspace effect is in progress */
   ClutterTimeline       *tml_switch_workspace1;
   ClutterTimeline       *tml_switch_workspace2;
-  GList                **actors;
   ClutterActor          *desktop1;
   ClutterActor          *desktop2;
 
-  MutterPluginInfo       info;
+  MetaPluginInfo         info;
 
   gboolean               debug_mode : 1;
 };
@@ -128,26 +136,26 @@ typedef struct _ActorPrivate
 typedef struct
 {
   ClutterActor *actor;
-  MutterPlugin *plugin;
+  MetaPlugin *plugin;
 } EffectCompleteData;
 
 
 static void
-mutter_default_plugin_dispose (GObject *object)
+meta_default_plugin_dispose (GObject *object)
 {
-  /* MutterDefaultPluginPrivate *priv = MUTTER_DEFAULT_PLUGIN (object)->priv;
+  /* MetaDefaultPluginPrivate *priv = META_DEFAULT_PLUGIN (object)->priv;
   */
-  G_OBJECT_CLASS (mutter_default_plugin_parent_class)->dispose (object);
+  G_OBJECT_CLASS (meta_default_plugin_parent_class)->dispose (object);
 }
 
 static void
-mutter_default_plugin_finalize (GObject *object)
+meta_default_plugin_finalize (GObject *object)
 {
-  G_OBJECT_CLASS (mutter_default_plugin_parent_class)->finalize (object);
+  G_OBJECT_CLASS (meta_default_plugin_parent_class)->finalize (object);
 }
 
 static void
-mutter_default_plugin_set_property (GObject      *object,
+meta_default_plugin_set_property (GObject      *object,
 			    guint         prop_id,
 			    const GValue *value,
 			    GParamSpec   *pspec)
@@ -161,7 +169,7 @@ mutter_default_plugin_set_property (GObject      *object,
 }
 
 static void
-mutter_default_plugin_get_property (GObject    *object,
+meta_default_plugin_get_property (GObject    *object,
 			    guint       prop_id,
 			    GValue     *value,
 			    GParamSpec *pspec)
@@ -175,10 +183,9 @@ mutter_default_plugin_get_property (GObject    *object,
 }
 
 static void
-mutter_default_plugin_constructed (GObject *object)
+start (MetaPlugin *plugin)
 {
-  MutterPlugin               *plugin = MUTTER_PLUGIN (object);
-  MutterDefaultPluginPrivate *priv   = MUTTER_DEFAULT_PLUGIN (object)->priv;
+  MetaDefaultPluginPrivate *priv   = META_DEFAULT_PLUGIN (plugin)->priv;
 
   guint destroy_timeout  = DESTROY_TIMEOUT;
   guint minimize_timeout = MINIMIZE_TIMEOUT;
@@ -186,7 +193,7 @@ mutter_default_plugin_constructed (GObject *object)
   guint map_timeout      = MAP_TIMEOUT;
   guint switch_timeout   = SWITCH_TIMEOUT;
 
-  if (mutter_plugin_debug_mode (plugin))
+  if (meta_plugin_debug_mode (plugin))
     {
       g_debug ("Plugin %s: Entering debug mode.", priv->info.name);
 
@@ -201,39 +208,39 @@ mutter_default_plugin_constructed (GObject *object)
       map_timeout      *= 2;
       switch_timeout   *= 2;
     }
-
 }
 
 static void
-mutter_default_plugin_class_init (MutterDefaultPluginClass *klass)
+meta_default_plugin_class_init (MetaDefaultPluginClass *klass)
 {
   GObjectClass      *gobject_class = G_OBJECT_CLASS (klass);
-  MutterPluginClass *plugin_class  = MUTTER_PLUGIN_CLASS (klass);
+  MetaPluginClass *plugin_class  = META_PLUGIN_CLASS (klass);
 
-  gobject_class->finalize        = mutter_default_plugin_finalize;
-  gobject_class->dispose         = mutter_default_plugin_dispose;
-  gobject_class->constructed     = mutter_default_plugin_constructed;
-  gobject_class->set_property    = mutter_default_plugin_set_property;
-  gobject_class->get_property    = mutter_default_plugin_get_property;
+  gobject_class->finalize        = meta_default_plugin_finalize;
+  gobject_class->dispose         = meta_default_plugin_dispose;
+  gobject_class->set_property    = meta_default_plugin_set_property;
+  gobject_class->get_property    = meta_default_plugin_get_property;
 
+  plugin_class->start            = start;
   plugin_class->map              = map;
   plugin_class->minimize         = minimize;
   plugin_class->maximize         = maximize;
   plugin_class->unmaximize       = unmaximize;
   plugin_class->destroy          = destroy;
   plugin_class->switch_workspace = switch_workspace;
-  plugin_class->kill_effect      = kill_effect;
   plugin_class->plugin_info      = plugin_info;
+  plugin_class->kill_window_effects   = kill_window_effects;
+  plugin_class->kill_switch_workspace = kill_switch_workspace;
 
-  g_type_class_add_private (gobject_class, sizeof (MutterDefaultPluginPrivate));
+  g_type_class_add_private (gobject_class, sizeof (MetaDefaultPluginPrivate));
 }
 
 static void
-mutter_default_plugin_init (MutterDefaultPlugin *self)
+meta_default_plugin_init (MetaDefaultPlugin *self)
 {
-  MutterDefaultPluginPrivate *priv;
+  MetaDefaultPluginPrivate *priv;
 
-  self->priv = priv = MUTTER_DEFAULT_PLUGIN_GET_PRIVATE (self);
+  self->priv = priv = META_DEFAULT_PLUGIN_GET_PRIVATE (self);
 
   priv->info.name        = "Default Effects";
   priv->info.version     = "0.1";
@@ -253,7 +260,7 @@ free_actor_private (gpointer data)
 }
 
 static ActorPrivate *
-get_actor_private (MutterWindow *actor)
+get_actor_private (MetaWindowActor *actor)
 {
   ActorPrivate *priv = g_object_get_qdata (G_OBJECT (actor), actor_data_quark);
 
@@ -272,26 +279,18 @@ get_actor_private (MutterWindow *actor)
   return priv;
 }
 
-typedef struct SwitchWorkspaceData
-{
-  MutterPlugin  *plugin;
-  const GList  **actors;
-} SwitchWorkspaceData;
-
 static void
 on_switch_workspace_effect_complete (ClutterTimeline *timeline, gpointer data)
 {
-  SwitchWorkspaceData        *sw_data = data;
-  MutterPlugin               *plugin  = sw_data->plugin;
-  MutterDefaultPluginPrivate *priv = MUTTER_DEFAULT_PLUGIN (plugin)->priv;
-  GList        *l     = *((GList**)sw_data->actors);
-  MutterWindow *actor_for_cb = l->data;
+  MetaPlugin               *plugin  = META_PLUGIN (data);
+  MetaDefaultPluginPrivate *priv = META_DEFAULT_PLUGIN (plugin)->priv;
+  GList        *l     = meta_plugin_get_window_actors (plugin);
 
   while (l)
     {
       ClutterActor *a = l->data;
-      MutterWindow *mc_window = MUTTER_WINDOW (a);
-      ActorPrivate *apriv = get_actor_private (mc_window);
+      MetaWindowActor *window_actor = META_WINDOW_ACTOR (a);
+      ActorPrivate *apriv = get_actor_private (window_actor);
 
       if (apriv->orig_parent)
         {
@@ -305,40 +304,30 @@ on_switch_workspace_effect_complete (ClutterTimeline *timeline, gpointer data)
   clutter_actor_destroy (priv->desktop1);
   clutter_actor_destroy (priv->desktop2);
 
-  priv->actors = NULL;
   priv->tml_switch_workspace1 = NULL;
   priv->tml_switch_workspace2 = NULL;
   priv->desktop1 = NULL;
   priv->desktop2 = NULL;
 
-  g_free (data);
-
-  mutter_plugin_effect_completed (plugin, actor_for_cb,
-                                  MUTTER_PLUGIN_SWITCH_WORKSPACE);
+  meta_plugin_switch_workspace_completed (plugin);
 }
 
 static void
-switch_workspace (MutterPlugin *plugin,
-                  const GList **actors, gint from, gint to,
+switch_workspace (MetaPlugin *plugin,
+                  gint from, gint to,
                   MetaMotionDirection direction)
 {
-  MutterDefaultPluginPrivate *priv = MUTTER_DEFAULT_PLUGIN (plugin)->priv;
+  MetaDefaultPluginPrivate *priv = META_DEFAULT_PLUGIN (plugin)->priv;
   GList        *l;
-  gint          n_workspaces;
   ClutterActor *workspace0  = clutter_group_new ();
   ClutterActor *workspace1  = clutter_group_new ();
   ClutterActor *stage;
   int           screen_width, screen_height;
-  MetaScreen   *screen = mutter_plugin_get_screen (plugin);
-  SwitchWorkspaceData *sw_data = g_new (SwitchWorkspaceData, 1);
   ClutterAnimation *animation;
 
-  sw_data->plugin = plugin;
-  sw_data->actors = actors;
+  stage = meta_plugin_get_stage (plugin);
 
-  stage = mutter_plugin_get_stage (plugin);
-
-  mutter_plugin_query_screen_size (plugin,
+  meta_plugin_query_screen_size (plugin,
 					      &screen_width,
 					      &screen_height);
   clutter_actor_set_anchor_point (workspace1,
@@ -355,32 +344,29 @@ switch_workspace (MutterPlugin *plugin,
 
   if (from == to)
     {
-      mutter_plugin_effect_completed (plugin, NULL,
-                           MUTTER_PLUGIN_SWITCH_WORKSPACE);
+      meta_plugin_switch_workspace_completed (plugin);
       return;
     }
 
-  n_workspaces = meta_screen_get_n_workspaces (screen);
-
-  l = g_list_last (*((GList**) actors));
+  l = g_list_last (meta_plugin_get_window_actors (plugin));
 
   while (l)
     {
-      MutterWindow *mc_window	= l->data;
-      ActorPrivate *apriv	= get_actor_private (mc_window);
-      ClutterActor *window	= CLUTTER_ACTOR (mc_window);
-      gint          win_workspace;
+      MetaWindowActor *window_actor = l->data;
+      ActorPrivate    *apriv	    = get_actor_private (window_actor);
+      ClutterActor    *actor	    = CLUTTER_ACTOR (window_actor);
+      gint             win_workspace;
 
-      win_workspace = mutter_window_get_workspace (mc_window);
+      win_workspace = meta_window_actor_get_workspace (window_actor);
 
       if (win_workspace == to || win_workspace == from)
         {
-          apriv->orig_parent = clutter_actor_get_parent (window);
+          apriv->orig_parent = clutter_actor_get_parent (actor);
 
-          clutter_actor_reparent (window,
+          clutter_actor_reparent (actor,
 				  win_workspace == to ? workspace1 : workspace0);
-          clutter_actor_show_all (window);
-          clutter_actor_raise_top (window);
+          clutter_actor_show_all (actor);
+          clutter_actor_raise_top (actor);
         }
       else if (win_workspace < 0)
         {
@@ -390,14 +376,13 @@ switch_workspace (MutterPlugin *plugin,
       else
         {
           /* Window on some other desktop */
-          clutter_actor_hide (window);
+          clutter_actor_hide (actor);
           apriv->orig_parent = NULL;
         }
 
       l = l->prev;
     }
 
-  priv->actors   = (GList **)actors;
   priv->desktop1 = workspace0;
   priv->desktop2 = workspace1;
 
@@ -410,7 +395,7 @@ switch_workspace (MutterPlugin *plugin,
   g_signal_connect (priv->tml_switch_workspace1,
                     "completed",
                     G_CALLBACK (on_switch_workspace_effect_complete),
-                    sw_data);
+                    plugin);
 
   animation = clutter_actor_animate (workspace1, CLUTTER_EASE_IN_SINE,
                                      SWITCH_TIMEOUT,
@@ -432,11 +417,11 @@ on_minimize_effect_complete (ClutterTimeline *timeline, EffectCompleteData *data
    * Must reverse the effect of the effect; must hide it first to ensure
    * that the restoration will not be visible.
    */
-  MutterPlugin *plugin = data->plugin;
+  MetaPlugin *plugin = data->plugin;
   ActorPrivate *apriv;
-  MutterWindow *mc_window = MUTTER_WINDOW (data->actor);
+  MetaWindowActor *window_actor = META_WINDOW_ACTOR (data->actor);
 
-  apriv = get_actor_private (MUTTER_WINDOW (data->actor));
+  apriv = get_actor_private (META_WINDOW_ACTOR (data->actor));
   apriv->tml_minimize = NULL;
 
   clutter_actor_hide (data->actor);
@@ -448,8 +433,7 @@ on_minimize_effect_complete (ClutterTimeline *timeline, EffectCompleteData *data
                                                 CLUTTER_GRAVITY_NORTH_WEST);
 
   /* Now notify the manager that we are done with this effect */
-  mutter_plugin_effect_completed (plugin, mc_window,
-                                  MUTTER_PLUGIN_MINIMIZE);
+  meta_plugin_minimize_completed (plugin, window_actor);
 
   g_free (data);
 }
@@ -459,18 +443,20 @@ on_minimize_effect_complete (ClutterTimeline *timeline, EffectCompleteData *data
  * completion).
  */
 static void
-minimize (MutterPlugin *plugin, MutterWindow *mc_window)
+minimize (MetaPlugin *plugin, MetaWindowActor *window_actor)
 {
-  MetaCompWindowType          type;
-  ClutterActor               *actor  = CLUTTER_ACTOR (mc_window);
+  MetaWindowType type;
+  MetaWindow *meta_window = meta_window_actor_get_meta_window (window_actor);
+  ClutterActor *actor  = CLUTTER_ACTOR (window_actor);
 
-  type = mutter_window_get_window_type (mc_window);
 
-  if (type == META_COMP_WINDOW_NORMAL)
+  type = meta_window_get_window_type (meta_window);
+
+  if (type == META_WINDOW_NORMAL)
     {
       ClutterAnimation *animation;
       EffectCompleteData *data = g_new0 (EffectCompleteData, 1);
-      ActorPrivate *apriv = get_actor_private (mc_window);
+      ActorPrivate *apriv = get_actor_private (window_actor);
 
       apriv->is_minimized = TRUE;
 
@@ -492,8 +478,7 @@ minimize (MutterPlugin *plugin, MutterWindow *mc_window)
 
     }
   else
-    mutter_plugin_effect_completed (plugin, mc_window,
-                                    MUTTER_PLUGIN_MINIMIZE);
+    meta_plugin_minimize_completed (plugin, window_actor);
 }
 
 /*
@@ -506,9 +491,9 @@ on_maximize_effect_complete (ClutterTimeline *timeline, EffectCompleteData *data
   /*
    * Must reverse the effect of the effect.
    */
-  MutterPlugin * plugin = data->plugin;
-  MutterWindow  *mc_window = MUTTER_WINDOW (data->actor);
-  ActorPrivate  *apriv     = get_actor_private (mc_window);
+  MetaPlugin *plugin = data->plugin;
+  MetaWindowActor *window_actor = META_WINDOW_ACTOR (data->actor);
+  ActorPrivate *apriv = get_actor_private (window_actor);
 
   apriv->tml_maximize = NULL;
 
@@ -518,8 +503,7 @@ on_maximize_effect_complete (ClutterTimeline *timeline, EffectCompleteData *data
                                                 CLUTTER_GRAVITY_NORTH_WEST);
 
   /* Now notify the manager that we are done with this effect */
-  mutter_plugin_effect_completed (plugin, mc_window,
-                                  MUTTER_PLUGIN_MAXIMIZE);
+  meta_plugin_maximize_completed (plugin, window_actor);
 
   g_free (data);
 }
@@ -533,25 +517,26 @@ on_maximize_effect_complete (ClutterTimeline *timeline, EffectCompleteData *data
  * (Something like a sound would be more appropriate.)
  */
 static void
-maximize (MutterPlugin *plugin,
-          MutterWindow *mc_window,
+maximize (MetaPlugin *plugin,
+          MetaWindowActor *window_actor,
           gint end_x, gint end_y, gint end_width, gint end_height)
 {
-  MetaCompWindowType  type;
-  ClutterActor	     *actor = CLUTTER_ACTOR (mc_window);
+  MetaWindowType type;
+  ClutterActor *actor = CLUTTER_ACTOR (window_actor);
+  MetaWindow *meta_window = meta_window_actor_get_meta_window (window_actor);
 
   gdouble  scale_x    = 1.0;
   gdouble  scale_y    = 1.0;
   gfloat   anchor_x   = 0;
   gfloat   anchor_y   = 0;
 
-  type = mutter_window_get_window_type (mc_window);
+  type = meta_window_get_window_type (meta_window);
 
-  if (type == META_COMP_WINDOW_NORMAL)
+  if (type == META_WINDOW_NORMAL)
     {
       ClutterAnimation *animation;
       EffectCompleteData *data = g_new0 (EffectCompleteData, 1);
-      ActorPrivate *apriv = get_actor_private (mc_window);
+      ActorPrivate *apriv = get_actor_private (window_actor);
       gfloat width, height;
       gfloat x, y;
 
@@ -589,8 +574,7 @@ maximize (MutterPlugin *plugin,
       return;
     }
 
-  mutter_plugin_effect_completed (plugin, mc_window,
-                                  MUTTER_PLUGIN_MAXIMIZE);
+  meta_plugin_maximize_completed (plugin, window_actor);
 }
 
 /*
@@ -599,22 +583,22 @@ maximize (MutterPlugin *plugin,
  * (Just a skeleton code.)
  */
 static void
-unmaximize (MutterPlugin *plugin,
-            MutterWindow *mc_window,
+unmaximize (MetaPlugin *plugin,
+            MetaWindowActor *window_actor,
             gint end_x, gint end_y, gint end_width, gint end_height)
 {
-  MetaCompWindowType type = mutter_window_get_window_type (mc_window);
+  MetaWindow *meta_window = meta_window_actor_get_meta_window (window_actor);
+  MetaWindowType type = meta_window_get_window_type (meta_window);
 
-  if (type == META_COMP_WINDOW_NORMAL)
+  if (type == META_WINDOW_NORMAL)
     {
-      ActorPrivate *apriv = get_actor_private (mc_window);
+      ActorPrivate *apriv = get_actor_private (window_actor);
 
       apriv->is_maximized = FALSE;
     }
 
   /* Do this conditionally, if the effect requires completion callback. */
-  mutter_plugin_effect_completed (plugin, mc_window,
-                                  MUTTER_PLUGIN_UNMAXIMIZE);
+  meta_plugin_unmaximize_completed (plugin, window_actor);
 }
 
 static void
@@ -623,9 +607,9 @@ on_map_effect_complete (ClutterTimeline *timeline, EffectCompleteData *data)
   /*
    * Must reverse the effect of the effect.
    */
-  MutterPlugin  *plugin = data->plugin;
-  MutterWindow  *mc_window = MUTTER_WINDOW (data->actor);
-  ActorPrivate  *apriv     = get_actor_private (mc_window);
+  MetaPlugin *plugin = data->plugin;
+  MetaWindowActor  *window_actor = META_WINDOW_ACTOR (data->actor);
+  ActorPrivate  *apriv = get_actor_private (window_actor);
 
   apriv->tml_map = NULL;
 
@@ -633,7 +617,7 @@ on_map_effect_complete (ClutterTimeline *timeline, EffectCompleteData *data)
                                                 CLUTTER_GRAVITY_NORTH_WEST);
 
   /* Now notify the manager that we are done with this effect */
-  mutter_plugin_effect_completed (plugin, mc_window, MUTTER_PLUGIN_MAP);
+  meta_plugin_map_completed (plugin, window_actor);
 
   g_free (data);
 }
@@ -643,18 +627,19 @@ on_map_effect_complete (ClutterTimeline *timeline, EffectCompleteData *data)
  * completion).
  */
 static void
-map (MutterPlugin *plugin, MutterWindow *mc_window)
+map (MetaPlugin *plugin, MetaWindowActor *window_actor)
 {
-  MetaCompWindowType  type;
-  ClutterActor       *actor = CLUTTER_ACTOR (mc_window);
+  MetaWindowType type;
+  ClutterActor *actor = CLUTTER_ACTOR (window_actor);
+  MetaWindow *meta_window = meta_window_actor_get_meta_window (window_actor);
 
-  type = mutter_window_get_window_type (mc_window);
+  type = meta_window_get_window_type (meta_window);
 
-  if (type == META_COMP_WINDOW_NORMAL)
+  if (type == META_WINDOW_NORMAL)
     {
       ClutterAnimation *animation;
       EffectCompleteData *data = g_new0 (EffectCompleteData, 1);
-      ActorPrivate *apriv = get_actor_private (mc_window);
+      ActorPrivate *apriv = get_actor_private (window_actor);
 
       clutter_actor_move_anchor_point_from_gravity (actor,
                                                     CLUTTER_GRAVITY_CENTER);
@@ -679,8 +664,7 @@ map (MutterPlugin *plugin, MutterWindow *mc_window)
 
     }
   else
-    mutter_plugin_effect_completed (plugin, mc_window,
-                                    MUTTER_PLUGIN_MAP);
+    meta_plugin_map_completed (plugin, window_actor);
 }
 
 /*
@@ -690,32 +674,32 @@ map (MutterPlugin *plugin, MutterWindow *mc_window)
 static void
 on_destroy_effect_complete (ClutterTimeline *timeline, EffectCompleteData *data)
 {
-  MutterPlugin *plugin = data->plugin;
-  MutterWindow *mc_window = MUTTER_WINDOW (data->actor);
-  ActorPrivate *apriv = get_actor_private (mc_window);
+  MetaPlugin *plugin = data->plugin;
+  MetaWindowActor *window_actor = META_WINDOW_ACTOR (data->actor);
+  ActorPrivate *apriv = get_actor_private (window_actor);
 
   apriv->tml_destroy = NULL;
 
-  mutter_plugin_effect_completed (plugin, mc_window,
-                                  MUTTER_PLUGIN_DESTROY);
+  meta_plugin_destroy_completed (plugin, window_actor);
 }
 
 /*
  * Simple TV-out like effect.
  */
 static void
-destroy (MutterPlugin *plugin, MutterWindow *mc_window)
+destroy (MetaPlugin *plugin, MetaWindowActor *window_actor)
 {
-  MetaCompWindowType   type;
-  ClutterActor	      *actor = CLUTTER_ACTOR (mc_window);
+  MetaWindowType type;
+  ClutterActor *actor = CLUTTER_ACTOR (window_actor);
+  MetaWindow *meta_window = meta_window_actor_get_meta_window (window_actor);
 
-  type = mutter_window_get_window_type (mc_window);
+  type = meta_window_get_window_type (meta_window);
 
-  if (type == META_COMP_WINDOW_NORMAL)
+  if (type == META_WINDOW_NORMAL)
     {
       ClutterAnimation *animation;
       EffectCompleteData *data = g_new0 (EffectCompleteData, 1);
-      ActorPrivate *apriv = get_actor_private (mc_window);
+      ActorPrivate *apriv = get_actor_private (window_actor);
 
       clutter_actor_move_anchor_point_from_gravity (actor,
                                                     CLUTTER_GRAVITY_CENTER);
@@ -734,64 +718,59 @@ destroy (MutterPlugin *plugin, MutterWindow *mc_window)
                         data);
     }
   else
-    mutter_plugin_effect_completed (plugin, mc_window,
-                                    MUTTER_PLUGIN_DESTROY);
+    meta_plugin_destroy_completed (plugin, window_actor);
 }
 
 static void
-kill_effect (MutterPlugin *plugin, MutterWindow *mc_window, gulong event)
+kill_switch_workspace (MetaPlugin     *plugin)
+{
+  MetaDefaultPluginPrivate *priv = META_DEFAULT_PLUGIN (plugin)->priv;
+
+  if (priv->tml_switch_workspace1)
+    {
+      clutter_timeline_stop (priv->tml_switch_workspace1);
+      clutter_timeline_stop (priv->tml_switch_workspace2);
+      g_signal_emit_by_name (priv->tml_switch_workspace1, "completed", NULL);
+    }
+}
+
+static void
+kill_window_effects (MetaPlugin      *plugin,
+                     MetaWindowActor *window_actor)
 {
   ActorPrivate *apriv;
 
-  if (event & MUTTER_PLUGIN_SWITCH_WORKSPACE)
-    {
-      MutterDefaultPluginPrivate *priv = MUTTER_DEFAULT_PLUGIN (plugin)->priv;
+  apriv = get_actor_private (window_actor);
 
-      if (priv->tml_switch_workspace1)
-        {
-          clutter_timeline_stop (priv->tml_switch_workspace1);
-          clutter_timeline_stop (priv->tml_switch_workspace2);
-          g_signal_emit_by_name (priv->tml_switch_workspace1, "completed", NULL);
-        }
-
-      if (!(event & ~MUTTER_PLUGIN_SWITCH_WORKSPACE))
-        {
-          /* Workspace switch only, nothing more to do */
-          return;
-        }
-    }
-
-  apriv = get_actor_private (mc_window);
-
-  if ((event & MUTTER_PLUGIN_MINIMIZE) && apriv->tml_minimize)
+  if (apriv->tml_minimize)
     {
       clutter_timeline_stop (apriv->tml_minimize);
       g_signal_emit_by_name (apriv->tml_minimize, "completed", NULL);
     }
 
-  if ((event & MUTTER_PLUGIN_MAXIMIZE) && apriv->tml_maximize)
+  if (apriv->tml_maximize)
     {
       clutter_timeline_stop (apriv->tml_maximize);
       g_signal_emit_by_name (apriv->tml_maximize, "completed", NULL);
     }
 
-  if ((event & MUTTER_PLUGIN_MAP) && apriv->tml_map)
+  if (apriv->tml_map)
     {
       clutter_timeline_stop (apriv->tml_map);
       g_signal_emit_by_name (apriv->tml_map, "completed", NULL);
     }
 
-  if ((event & MUTTER_PLUGIN_DESTROY) && apriv->tml_destroy)
+  if (apriv->tml_destroy)
     {
       clutter_timeline_stop (apriv->tml_destroy);
       g_signal_emit_by_name (apriv->tml_destroy, "completed", NULL);
     }
 }
 
-static const MutterPluginInfo *
-plugin_info (MutterPlugin *plugin)
+static const MetaPluginInfo *
+plugin_info (MetaPlugin *plugin)
 {
-  MutterDefaultPluginPrivate *priv = MUTTER_DEFAULT_PLUGIN (plugin)->priv;
+  MetaDefaultPluginPrivate *priv = META_DEFAULT_PLUGIN (plugin)->priv;
 
   return &priv->info;
 }

src/compositor/region-utils.c

@@ -0,0 +1,336 @@
+/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
+/*
+ * Utilities for region manipulation
+ *
+ * Copyright (C) 2010 Red Hat, Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.
+ */
+
+#include "region-utils.h"
+
+#include <math.h>
+
+/* MetaRegionBuilder */
+
+/* Various algorithms in this file require unioning together a set of rectangles
+ * that are unsorted or overlap; unioning such a set of rectangles 1-by-1
+ * using cairo_region_union_rectangle() produces O(N^2) behavior (if the union
+ * adds or removes rectangles in the middle of the region, then it has to
+ * move all the rectangles after that.) To avoid this behavior, MetaRegionBuilder
+ * creates regions for small groups of rectangles and merges them together in
+ * a binary tree.
+ *
+ * Possible improvement: From a glance at the code, accumulating all the rectangles
+ *  into a flat array and then calling the (not usefully documented)
+ *  cairo_region_create_rectangles() would have the same behavior and would be
+ *  simpler and a bit more efficient.
+ */
+
+/* Optimium performance seems to be with MAX_CHUNK_RECTANGLES=4; 8 is about 10% slower.
+ * But using 8 may be more robust to systems with slow malloc(). */
+#define MAX_CHUNK_RECTANGLES 8
+#define MAX_LEVELS 16
+
+typedef struct
+{
+  /* To merge regions in binary tree order, we need to keep track of
+   * the regions that we've already merged together at different
+   * levels of the tree. We fill in an array in the pattern:
+   *
+   * |a  |
+   * |b  |a  |
+   * |c  |   |ab |
+   * |d  |c  |ab |
+   * |e  |   |   |abcd|
+   */
+  cairo_region_t *levels[MAX_LEVELS];
+  int n_levels;
+} MetaRegionBuilder;
+
+static void
+meta_region_builder_init (MetaRegionBuilder *builder)
+{
+  int i;
+  for (i = 0; i < MAX_LEVELS; i++)
+    builder->levels[i] = NULL;
+  builder->n_levels = 1;
+}
+
+static void
+meta_region_builder_add_rectangle (MetaRegionBuilder *builder,
+                                   int                x,
+                                   int                y,
+                                   int                width,
+                                   int                height)
+{
+  cairo_rectangle_int_t rect;
+  int i;
+
+  if (builder->levels[0] == NULL)
+    builder->levels[0] = cairo_region_create ();
+
+  rect.x = x;
+  rect.y = y;
+  rect.width = width;
+  rect.height = height;
+
+  cairo_region_union_rectangle (builder->levels[0], &rect);
+  if (cairo_region_num_rectangles (builder->levels[0]) >= MAX_CHUNK_RECTANGLES)
+    {
+      for (i = 1; i < builder->n_levels + 1; i++)
+        {
+          if (builder->levels[i] == NULL)
+            {
+              if (i < MAX_LEVELS)
+                {
+                  builder->levels[i] = builder->levels[i - 1];
+                  builder->levels[i - 1] = NULL;
+                  if (i == builder->n_levels)
+                    builder->n_levels++;
+                }
+
+              break;
+            }
+          else
+            {
+              cairo_region_union (builder->levels[i], builder->levels[i - 1]);
+              cairo_region_destroy (builder->levels[i - 1]);
+              builder->levels[i - 1] = NULL;
+            }
+        }
+    }
+}
+
+static cairo_region_t *
+meta_region_builder_finish (MetaRegionBuilder *builder)
+{
+  cairo_region_t *result = NULL;
+  int i;
+
+  for (i = 0; i < builder->n_levels; i++)
+    {
+      if (builder->levels[i])
+        {
+          if (result == NULL)
+            result = builder->levels[i];
+          else
+            {
+              cairo_region_union(result, builder->levels[i]);
+              cairo_region_destroy (builder->levels[i]);
+            }
+        }
+    }
+
+  if (result == NULL)
+    result = cairo_region_create ();
+
+  return result;
+}
+
+
+/* MetaRegionIterator */
+
+void
+meta_region_iterator_init (MetaRegionIterator *iter,
+                           cairo_region_t     *region)
+{
+  iter->region = region;
+  iter->i = 0;
+  iter->n_rectangles = cairo_region_num_rectangles (region);
+  iter->line_start = TRUE;
+
+  if (iter->n_rectangles > 1)
+    {
+      cairo_region_get_rectangle (region, 0, &iter->rectangle);
+      cairo_region_get_rectangle (region, 1, &iter->next_rectangle);
+
+      iter->line_end = iter->next_rectangle.y != iter->rectangle.y;
+    }
+  else if (iter->n_rectangles > 0)
+    {
+      cairo_region_get_rectangle (region, 0, &iter->rectangle);
+      iter->line_end = TRUE;
+    }
+}
+
+gboolean
+meta_region_iterator_at_end (MetaRegionIterator *iter)
+{
+  return iter->i >= iter->n_rectangles;
+}
+
+void
+meta_region_iterator_next (MetaRegionIterator *iter)
+{
+  iter->i++;
+  iter->rectangle = iter->next_rectangle;
+  iter->line_start = iter->line_end;
+
+  if (iter->i + 1 < iter->n_rectangles)
+    {
+      cairo_region_get_rectangle (iter->region, iter->i + 1, &iter->next_rectangle);
+      iter->line_end = iter->next_rectangle.y != iter->rectangle.y;
+    }
+  else
+    {
+      iter->line_end = TRUE;
+    }
+}
+
+static void
+add_expanded_rect (MetaRegionBuilder  *builder,
+                   int                 x,
+                   int                 y,
+                   int                 width,
+                   int                 height,
+                   int                 x_amount,
+                   int                 y_amount,
+                   gboolean            flip)
+{
+  if (flip)
+    meta_region_builder_add_rectangle (builder,
+                                       y - y_amount, x - x_amount,
+                                       height + 2 * y_amount, width + 2 * x_amount);
+  else
+    meta_region_builder_add_rectangle (builder,
+                                       x - x_amount, y - y_amount,
+                                       width + 2 * x_amount, height + 2 * y_amount);
+}
+
+static cairo_region_t *
+expand_region (cairo_region_t *region,
+               int             x_amount,
+               int             y_amount,
+               gboolean        flip)
+{
+  MetaRegionBuilder builder;
+  int n;
+  int i;
+
+  meta_region_builder_init (&builder);
+
+  n = cairo_region_num_rectangles (region);
+  for (i = 0; i < n; i++)
+    {
+      cairo_rectangle_int_t rect;
+
+      cairo_region_get_rectangle (region, i, &rect);
+      add_expanded_rect (&builder,
+                         rect.x, rect.y, rect.width, rect.height,
+                         x_amount, y_amount, flip);
+    }
+
+  return meta_region_builder_finish (&builder);
+}
+
+/* This computes a (clipped version) of the inverse of the region
+ * and expands it by the given amount */
+static cairo_region_t *
+expand_region_inverse (cairo_region_t *region,
+                       int             x_amount,
+                       int             y_amount,
+                       gboolean        flip)
+{
+  MetaRegionBuilder builder;
+  MetaRegionIterator iter;
+  cairo_rectangle_int_t extents;
+  cairo_region_t *chunk;
+
+  int last_x;
+
+  meta_region_builder_init (&builder);
+
+  cairo_region_get_extents (region, &extents);
+  add_expanded_rect (&builder,
+                     extents.x, extents.y - 1, extents.width, 1,
+                     x_amount, y_amount, flip);
+  add_expanded_rect (&builder,
+                     extents.x - 1, extents.y, 1, extents.height,
+                     x_amount, y_amount, flip);
+  add_expanded_rect (&builder,
+                     extents.x + extents.width, extents.y, 1, extents.height,
+                     x_amount, y_amount, flip);
+  add_expanded_rect (&builder,
+                     extents.x, extents.y + extents.height, extents.width, 1,
+                     x_amount, y_amount, flip);
+
+  chunk = NULL;
+
+  last_x = extents.x;
+  for (meta_region_iterator_init (&iter, region);
+       !meta_region_iterator_at_end (&iter);
+       meta_region_iterator_next (&iter))
+    {
+      if (chunk == NULL)
+        chunk = cairo_region_create ();
+
+      if (iter.rectangle.x > last_x)
+        add_expanded_rect (&builder,
+                           last_x, iter.rectangle.y,
+                           iter.rectangle.x - last_x, iter.rectangle.height,
+                           x_amount, y_amount, flip);
+
+      if (iter.line_end)
+        {
+          if (extents.x + extents.width > iter.rectangle.x + iter.rectangle.width)
+            add_expanded_rect (&builder,
+                               iter.rectangle.x + iter.rectangle.width, iter.rectangle.y,
+                               (extents.x + extents.width) - (iter.rectangle.x + iter.rectangle.width), iter.rectangle.height,
+                               x_amount, y_amount, flip);
+          last_x = extents.x;
+        }
+      else
+        last_x = iter.rectangle.x + iter.rectangle.width;
+    }
+
+  return meta_region_builder_finish (&builder);
+}
+
+/**
+ * meta_make_border_region:
+ * @region: a #cairo_region_t
+ * @x_amount: distance from the border to extend horizontally
+ * @y_amount: distance from the border to extend vertically
+ * @flip: if true, the result is computed with x and y interchanged
+ *
+ * Computes the "border region" of a given region, which is roughly
+ * speaking the set of points near the boundary of the region.  If we
+ * define the operation of growing a region as computing the set of
+ * points within a given manhattan distance of the region, then the
+ * border is 'grow(region) intersect grow(inverse(region))'.
+ *
+ * If we create an image by filling the region with a solid color,
+ * the border is the region affected by blurring the region.
+ *
+ * Return value: a new region which is the border of the given region
+ */
+cairo_region_t *
+meta_make_border_region (cairo_region_t *region,
+                         int             x_amount,
+                         int             y_amount,
+                         gboolean        flip)
+{
+  cairo_region_t *border_region;
+  cairo_region_t *inverse_region;
+
+  border_region = expand_region (region, x_amount, y_amount, flip);
+  inverse_region = expand_region_inverse (region, x_amount, y_amount, flip);
+  cairo_region_intersect (border_region, inverse_region);
+  cairo_region_destroy (inverse_region);
+
+  return border_region;
+}

src/compositor/region-utils.h

@@ -0,0 +1,76 @@
+/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
+/*
+ * Utilities for region manipulation
+ *
+ * Copyright (C) 2010 Red Hat, Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.
+ */
+
+#ifndef __META_REGION_UTILS_H__
+#define __META_REGION_UTILS_H__
+
+#include <clutter/clutter.h>
+
+#include <cairo.h>
+#include <glib.h>
+
+/**
+ * MetaRegionIterator:
+ * @region: region being iterated
+ * @rectangle: current rectangle
+ * @line_start: whether the current rectangle starts a horizontal band
+ * @line_end: whether the current rectangle ends a horizontal band
+ *
+ * cairo_region_t is a yx banded region; sometimes its useful to iterate through
+ * such a region treating the start and end of each horizontal band in a distinct
+ * fashion.
+ *
+ * Usage:
+ *
+ *  MetaRegionIterator iter;
+ *  for (meta_region_iterator_init (&iter, region);
+ *       !meta_region_iterator_at_end (&iter);
+ *       meta_region_iterator_next (&iter))
+ *  {
+ *    [ Use iter.rectangle, iter.line_start, iter.line_end ]
+ *  }
+ */
+typedef struct _MetaRegionIterator MetaRegionIterator;
+
+struct _MetaRegionIterator {
+  cairo_region_t *region;
+  cairo_rectangle_int_t rectangle;
+  gboolean line_start;
+  gboolean line_end;
+  int i;
+
+  /*< private >*/
+  int n_rectangles;
+  cairo_rectangle_int_t next_rectangle;
+};
+
+void     meta_region_iterator_init      (MetaRegionIterator *iter,
+                                         cairo_region_t     *region);
+gboolean meta_region_iterator_at_end    (MetaRegionIterator *iter);
+void     meta_region_iterator_next      (MetaRegionIterator *iter);
+
+cairo_region_t *meta_make_border_region (cairo_region_t *region,
+                                         int             x_amount,
+                                         int             y_amount,
+                                         gboolean        flip);
+
+#endif /* __META_REGION_UTILS_H__ */

src/core/above-tab-keycode.c

@@ -0,0 +1,241 @@
+/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
+
+/* Find the keycode for the key above the tab key */
+/*
+ * Copyright 2010 Red Hat, Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.
+ */
+
+/* The standard cycle-windows keybinding should be the key above the
+ * tab key. This will have a different keysym on different keyboards -
+ * it's the ` (grave) key on US keyboards but something else on many
+ * other national layouts. So we need to figure out the keycode for
+ * this key without reference to key symbol.
+ *
+ * The "correct" way to do this is to get the XKB geometry from the
+ * X server, find the Tab key, find the key above the Tab key in the
+ * same section and use the keycode for that key. This is what I
+ * implemented here, but unfortunately, fetching the geometry is rather
+ * slow (It could take 20ms or more.)
+ *
+ * If you looking for a way to optimize Mutter startup performance:
+ * On all Linux systems using evdev the key above TAB will have
+ * keycode 49. (KEY_GRAVE=41 + the 8 code point offset between
+ * evdev keysyms and X keysyms.) So a configure option
+ * --with-above-tab-keycode=49 could be added that bypassed this
+ * code. It wouldn't work right for displaying Mutter remotely
+ * to a non-Linux X server, but that is pretty rare.
+ */
+
+#include <config.h>
+
+#include <string.h>
+
+#include "display-private.h"
+
+#include <X11/keysym.h>
+
+#ifdef HAVE_XKB
+#include <X11/XKBlib.h>
+#include <X11/extensions/XKBgeom.h>
+
+static guint
+compute_above_tab_keycode (Display *xdisplay)
+{
+  XkbDescPtr keyboard;
+  XkbGeometryPtr geometry;
+  int i, j, k;
+  int tab_keycode;
+  char *tab_name;
+  XkbSectionPtr tab_section;
+  XkbBoundsRec tab_bounds;
+  XkbKeyPtr best_key = NULL;
+  guint best_keycode = (guint)-1;
+  int best_x_dist = G_MAXINT;
+  int best_y_dist = G_MAXINT;
+
+  /* We need only the Names and the Geometry, but asking for these results
+   * in the Keyboard information retrieval failing for unknown reasons.
+   * (Testing with xorg-1.9.1.) So we ask for a part that we don't need
+   * as well.
+   */
+  keyboard = XkbGetKeyboard (xdisplay,
+                             XkbGBN_ClientSymbolsMask | XkbGBN_KeyNamesMask | XkbGBN_GeometryMask,
+                             XkbUseCoreKbd);
+
+  geometry = keyboard->geom;
+
+  /* There could potentially be multiple keys with the Tab keysym on the keyboard;
+   * but XKeysymToKeycode() returns us the one that the alt-Tab binding will
+   * use which is good enough
+   */
+  tab_keycode = XKeysymToKeycode (xdisplay, XK_Tab);
+  if (tab_keycode == 0 || tab_keycode < keyboard->min_key_code || tab_keycode > keyboard->max_key_code)
+    goto out;
+
+  /* The keyboard geometry is stored by key "name" rather than keycode.
+   * (Key names are 4-character strings like like TAB or AE01.) We use the
+   * 'names' part of the keyboard description to map keycode to key name.
+   *
+   * XKB has a "key aliases" feature where a single keyboard key can have
+   * multiple names (with separate sets of aliases in the 'names' part and
+   * in the 'geometry' part), but I don't really understand it or how it is used,
+   * so I'm ignoring it here.
+   */
+
+  tab_name = keyboard->names->keys[tab_keycode].name; /* Not NULL terminated! */
+
+  /* First, iterate through the keyboard geometry to find the tab key; the keyboard
+   * geometry has a three-level heirarchy of section > row > key
+   */
+  for (i = 0; i < geometry->num_sections; i++)
+    {
+      XkbSectionPtr section = &geometry->sections[i];
+      for (j = 0; j < section->num_rows; j++)
+        {
+          int x = 0;
+          int y = 0;
+
+          XkbRowPtr row = &section->rows[j];
+          for (k = 0; k < row->num_keys; k++)
+            {
+              XkbKeyPtr key = &row->keys[k];
+              XkbShapePtr shape = XkbKeyShape (geometry, key);
+
+              if (row->vertical)
+                y += key->gap;
+              else
+                x += key->gap;
+
+              if (strncmp (key->name.name, tab_name, XkbKeyNameLength) == 0)
+                {
+                  tab_section = section;
+                  tab_bounds = shape->bounds;
+                  tab_bounds.x1 += row->left + x;
+                  tab_bounds.x2 += row->left + x;
+                  tab_bounds.y1 += row->top + y;
+                  tab_bounds.y2 += row->top + y;
+
+                  goto found_tab;
+                }
+
+              if (row->vertical)
+                y += (shape->bounds.y2 - shape->bounds.y1);
+              else
+                x += (shape->bounds.x2 - shape->bounds.x1);
+            }
+        }
+    }
+
+  /* No tab key found */
+  goto out;
+
+ found_tab:
+
+  /* Now find the key that:
+   *  - Is in the same section as the Tab key
+   *  - Has a horizontal center in the Tab key's horizonal bounds
+   *  - Is above the Tab key at a distance closer than any other key
+   *  - In case of ties, has its horizontal center as close as possible
+   *    to the Tab key's horizontal center
+   */
+  for (j = 0; j < tab_section->num_rows; j++)
+    {
+      int x = 0;
+      int y = 0;
+
+      XkbRowPtr row = &tab_section->rows[j];
+      for (k = 0; k < row->num_keys; k++)
+        {
+          XkbKeyPtr key = &row->keys[k];
+          XkbShapePtr shape = XkbKeyShape(geometry, key);
+          XkbBoundsRec bounds = shape->bounds;
+          int x_center;
+          int x_dist, y_dist;
+
+          if (row->vertical)
+            y += key->gap;
+          else
+            x += key->gap;
+
+          bounds.x1 += row->left + x;
+          bounds.x2 += row->left + x;
+          bounds.y1 += row->top + y;
+          bounds.y2 += row->top + y;
+
+          y_dist = tab_bounds.y1 - bounds.y2;
+          if (y_dist < 0)
+            continue;
+
+          x_center = (bounds.x1 + bounds.x2) / 2;
+          if (x_center < tab_bounds.x1 || x_center > tab_bounds.x2)
+            continue;
+
+          x_dist = ABS (x_center - (tab_bounds.x1 + tab_bounds.x2) / 2);
+
+          if (y_dist < best_y_dist ||
+              (y_dist == best_y_dist && x_dist < best_x_dist))
+            {
+              best_key = key;
+              best_x_dist = x_dist;
+              best_y_dist = y_dist;
+             }
+
+          if (row->vertical)
+            y += (shape->bounds.y2 - shape->bounds.y1);
+          else
+            x += (shape->bounds.x2 - shape->bounds.x1);
+        }
+    }
+
+  if (best_key == NULL)
+    goto out;
+
+  /* Now we need to resolve the name of the best key back to a keycode */
+  for (i = keyboard->min_key_code; i < keyboard->max_key_code; i++)
+    {
+      if (strncmp (best_key->name.name, keyboard->names->keys[i].name, XkbKeyNameLength) == 0)
+        {
+          best_keycode = i;
+          break;
+        }
+    }
+
+ out:
+  XkbFreeKeyboard (keyboard, 0, True);
+
+  return best_keycode;
+}
+#else /* !HAVE_XKB */
+static guint
+compute_above_tab_keycode (Display *xdisplay)
+{
+  return XKeysymToKeycode (xdisplay, XK_grave);
+}
+#endif /* HAVE_XKB */
+
+guint
+meta_display_get_above_tab_keycode (MetaDisplay *display)
+{
+  if (display->above_tab_keycode == 0) /* not yet computed */
+    display->above_tab_keycode = compute_above_tab_keycode (display->xdisplay);
+
+  if (display->above_tab_keycode == (guint)-1) /* failed to compute */
+    return 0;
+  else
+    return display->above_tab_keycode;
+}

src/core/all-keybindings.h

@@ -146,7 +146,7 @@ keybind (switch_to_workspace_down, handle_switch_to_workspace,
  */
 
 keybind (switch_group,              handle_switch,        META_TAB_LIST_GROUP,
-         BINDING_REVERSES,       NULL,
+         BINDING_REVERSES,       "<Alt>Above_Tab",
         _("Move between windows of an application, using a popup window"))
 keybind (switch_group_backward,    handle_switch,        META_TAB_LIST_GROUP,
          REVERSES_AND_REVERSED,  NULL,
@@ -186,6 +186,18 @@ keybind (cycle_panels_backward,    handle_cycle,         META_TAB_LIST_DOCKS,
         _("Move backward between panels and the desktop immediately"))
 
 /***********************************/
+
+/* These two are special pseudo-bindings that are provided for allowing
+ * custom handlers, but will never be bound to a key. While a tab
+ * grab is in effect, they are invoked for releasing the primary modifier
+ * or pressing some unbound key, respectively.
+ */
+keybind (tab_popup_select,        handle_tab_popup_select, 0, 0, NULL,
+         "Select window from tab popup")
+keybind (tab_popup_cancel,        handle_tab_popup_cancel, 0, 0, NULL,
+         "Cancel tab popup")
+
+/***********************************/
      
 keybind (show_desktop, handle_show_desktop, 0, 0, "<Control><Alt>d",
       _("Hide all normal windows and set focus to the desktop"))

src/core/alttabhandler.c

@@ -1,138 +0,0 @@
-/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
-
-/* Metacity Alt-Tab abstraction */
-
-/*
- * Copyright (C) 2009 Red Hat, Inc.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of the
- * License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
- * 02111-1307, USA.
- */
-
-#include <config.h>
-#include "alttabhandlerdefault.h"
-#include "screen-private.h"
-
-static GType handler_type = G_TYPE_INVALID;
-
-GType meta_alt_tab_handler_default_get_type (void);
-
-void
-meta_alt_tab_handler_register (GType type)
-{
-  handler_type = type;
-}
-
-MetaAltTabHandler *
-meta_alt_tab_handler_new (MetaScreen *screen,
-                          gboolean    immediate)
-{
-  if (handler_type == G_TYPE_INVALID)
-    handler_type = meta_alt_tab_handler_default_get_type ();
-
-  return g_object_new (handler_type,
-                       "screen", screen,
-                       "immediate", immediate,
-                       NULL);
-}
-
-static void meta_alt_tab_handler_class_init (GObjectClass *object_class);
-
-GType
-meta_alt_tab_handler_get_type (void)
-{
-  static volatile gsize g_define_type_id__volatile = 0;
-
-  if (g_once_init_enter (&g_define_type_id__volatile))
-    {
-      const GTypeInfo type_info =
-      {
-        sizeof (MetaAltTabHandlerInterface), /* class_size */
-	NULL,           /* base_init */
-	NULL,		/* base_finalize */
-	(GClassInitFunc)meta_alt_tab_handler_class_init,
-	NULL,		/* class_finalize */
-	NULL,		/* class_data */
-	0,
-	0,              /* n_preallocs */
-	NULL
-      };
-      GType g_define_type_id =
-	g_type_register_static (G_TYPE_INTERFACE, "MetaAltTabHandler",
-				&type_info, 0);
-
-      g_type_interface_add_prerequisite (g_define_type_id, G_TYPE_OBJECT);
-
-      g_once_init_leave (&g_define_type_id__volatile, g_define_type_id);
-    }
-
-  return g_define_type_id__volatile;
-}
-
-static void
-meta_alt_tab_handler_class_init (GObjectClass *object_class)
-{
-  g_object_interface_install_property (object_class,
-                                       g_param_spec_object ("screen",
-                                                            "Screen",
-                                                            "MetaScreen this is the switcher for",
-                                                            META_TYPE_SCREEN,
-                                                            G_PARAM_WRITABLE | G_PARAM_CONSTRUCT_ONLY));
-  g_object_interface_install_property (object_class,
-                                       g_param_spec_boolean ("immediate",
-                                                             "Immediate mode",
-                                                             "Whether or not to select windows immediately",
-                                                             FALSE,
-                                                             G_PARAM_WRITABLE | G_PARAM_CONSTRUCT_ONLY));
-}
-
-void
-meta_alt_tab_handler_add_window (MetaAltTabHandler *handler,
-				 MetaWindow        *window)
-{
-  META_ALT_TAB_HANDLER_GET_INTERFACE (handler)->add_window (handler, window);
-}
-
-void
-meta_alt_tab_handler_show (MetaAltTabHandler *handler,
-                           MetaWindow        *initial_selection)
-{
-  META_ALT_TAB_HANDLER_GET_INTERFACE (handler)->show (handler,
-                                                      initial_selection);
-}
-
-void
-meta_alt_tab_handler_destroy (MetaAltTabHandler *handler)
-{
-  META_ALT_TAB_HANDLER_GET_INTERFACE (handler)->destroy (handler);
-}
-
-void
-meta_alt_tab_handler_forward (MetaAltTabHandler *handler)
-{
-  META_ALT_TAB_HANDLER_GET_INTERFACE (handler)->forward (handler);
-}
-
-void
-meta_alt_tab_handler_backward (MetaAltTabHandler *handler)
-{
-  META_ALT_TAB_HANDLER_GET_INTERFACE (handler)->backward (handler);
-}
-
-MetaWindow *
-meta_alt_tab_handler_get_selected (MetaAltTabHandler *handler)
-{
-  return META_ALT_TAB_HANDLER_GET_INTERFACE (handler)->get_selected (handler);
-}

src/core/alttabhandlerdefault.c

@@ -1,223 +0,0 @@
-/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
-
-/* Metacity Alt-Tab abstraction: default implementation */
-
-/*
- * Copyright (C) 2009 Red Hat, Inc.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of the
- * License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
- * 02111-1307, USA.
- */
-
-#include <config.h>
-#include "alttabhandlerdefault.h"
-#include "frame-private.h"
-#include "window-private.h"
-
-static void meta_alt_tab_handler_default_interface_init (MetaAltTabHandlerInterface *handler_iface);
-
-G_DEFINE_TYPE_WITH_CODE (MetaAltTabHandlerDefault, meta_alt_tab_handler_default, G_TYPE_OBJECT,
-                         G_IMPLEMENT_INTERFACE (META_TYPE_ALT_TAB_HANDLER,
-                                                meta_alt_tab_handler_default_interface_init))
-
-enum {
-  PROP_SCREEN = 1,
-  PROP_IMMEDIATE
-};
-
-static void
-meta_alt_tab_handler_default_init (MetaAltTabHandlerDefault *hd)
-{
-  hd->entries = g_array_new (FALSE, FALSE, sizeof (MetaTabEntry));
-}
-
-static void
-meta_alt_tab_handler_default_set_property (GObject      *object,
-                                           guint         prop_id,
-                                           const GValue *value,
-                                           GParamSpec   *pspec)
-{
-  MetaAltTabHandlerDefault *hd = META_ALT_TAB_HANDLER_DEFAULT (object);
-
-  switch (prop_id)
-    {
-    case PROP_SCREEN:
-      hd->screen = g_value_get_object (value);
-      break;
-    case PROP_IMMEDIATE:
-      hd->immediate_mode = g_value_get_boolean (value);
-      break;
-    default:
-      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
-      break;
-    }
-}
-
-static void
-meta_alt_tab_handler_default_finalize (GObject *object)
-{
-  MetaAltTabHandlerDefault *hd = META_ALT_TAB_HANDLER_DEFAULT (object);
-
-  g_array_free (hd->entries, TRUE);
-
-  if (hd->tab_popup)
-    meta_ui_tab_popup_free (hd->tab_popup);
-
-  G_OBJECT_CLASS (meta_alt_tab_handler_default_parent_class)->finalize (object);
-}
-
-static void
-meta_alt_tab_handler_default_add_window (MetaAltTabHandler *handler,
-                                         MetaWindow        *window)
-{
-  MetaAltTabHandlerDefault *hd = META_ALT_TAB_HANDLER_DEFAULT (handler);
-  MetaTabEntry entry;
-  MetaRectangle r;
-
-  entry.key = (MetaTabEntryKey) window;
-  entry.title = window->title;
-  entry.icon = window->icon;
-  entry.blank = FALSE;
-  entry.hidden = !meta_window_showing_on_its_workspace (window);
-  entry.demands_attention = window->wm_state_demands_attention;
-
-  if (hd->immediate_mode || !entry.hidden ||
-      !meta_window_get_icon_geometry (window, &r))
-    meta_window_get_outer_rect (window, &r);
-  entry.rect = r;
-
-  /* Find inside of highlight rectangle to be used when window is
-   * outlined for tabbing.  This should be the size of the
-   * east/west frame, and the size of the south frame, on those
-   * sides.  On the top it should be the size of the south frame
-   * edge.
-   */
-#define OUTLINE_WIDTH 5
-  /* Top side */
-  if (!entry.hidden &&
-      window->frame && window->frame->bottom_height > 0 &&
-      window->frame->child_y >= window->frame->bottom_height)
-    entry.inner_rect.y = window->frame->bottom_height;
-  else
-    entry.inner_rect.y = OUTLINE_WIDTH;
-
-  /* Bottom side */
-  if (!entry.hidden &&
-      window->frame && window->frame->bottom_height != 0)
-    entry.inner_rect.height = r.height
-      - entry.inner_rect.y - window->frame->bottom_height;
-  else
-    entry.inner_rect.height = r.height
-      - entry.inner_rect.y - OUTLINE_WIDTH;
-
-  /* Left side */
-  if (!entry.hidden && window->frame && window->frame->child_x != 0)
-    entry.inner_rect.x = window->frame->child_x;
-  else
-    entry.inner_rect.x = OUTLINE_WIDTH;
-
-  /* Right side */
-  if (!entry.hidden &&
-      window->frame && window->frame->right_width != 0)
-    entry.inner_rect.width = r.width
-      - entry.inner_rect.x - window->frame->right_width;
-  else
-    entry.inner_rect.width = r.width
-      - entry.inner_rect.x - OUTLINE_WIDTH;
-
-  g_array_append_val (hd->entries, entry);
-}
-
-static void
-meta_alt_tab_handler_default_show (MetaAltTabHandler *handler,
-                                   MetaWindow        *initial_selection)
-{
-  MetaAltTabHandlerDefault *hd = META_ALT_TAB_HANDLER_DEFAULT (handler);
-
-  if (hd->tab_popup)
-    return;
-
-  hd->tab_popup = meta_ui_tab_popup_new ((MetaTabEntry *)hd->entries->data,
-                                         hd->screen->number,
-                                         hd->entries->len,
-                                         5, /* FIXME */
-                                         TRUE);
-  meta_ui_tab_popup_select (hd->tab_popup, (MetaTabEntryKey) initial_selection);
-  meta_ui_tab_popup_set_showing (hd->tab_popup, !hd->immediate_mode);
-}
-
-static void
-meta_alt_tab_handler_default_destroy (MetaAltTabHandler *handler)
-{
-  MetaAltTabHandlerDefault *hd = META_ALT_TAB_HANDLER_DEFAULT (handler);
-
-  if (hd->tab_popup)
-    {
-      meta_ui_tab_popup_free (hd->tab_popup);
-      hd->tab_popup = NULL;
-    }
-}
-
-static void
-meta_alt_tab_handler_default_forward (MetaAltTabHandler *handler)
-{
-  MetaAltTabHandlerDefault *hd = META_ALT_TAB_HANDLER_DEFAULT (handler);
-
-  if (hd->tab_popup)
-    meta_ui_tab_popup_forward (hd->tab_popup);
-}
-
-static void
-meta_alt_tab_handler_default_backward (MetaAltTabHandler *handler)
-{
-  MetaAltTabHandlerDefault *hd = META_ALT_TAB_HANDLER_DEFAULT (handler);
-
-  if (hd->tab_popup)
-    meta_ui_tab_popup_backward (hd->tab_popup);
-}
-
-static MetaWindow *
-meta_alt_tab_handler_default_get_selected (MetaAltTabHandler *handler)
-{
-  MetaAltTabHandlerDefault *hd = META_ALT_TAB_HANDLER_DEFAULT (handler);
-
-  if (hd->tab_popup)
-    return (MetaWindow *)meta_ui_tab_popup_get_selected (hd->tab_popup);
-  else
-    return NULL;
-}
-
-static void
-meta_alt_tab_handler_default_class_init (MetaAltTabHandlerDefaultClass *klass)
-{
-  GObjectClass *object_class = G_OBJECT_CLASS (klass);
-
-  object_class->set_property = meta_alt_tab_handler_default_set_property;
-  object_class->finalize     = meta_alt_tab_handler_default_finalize;
-
-  g_object_class_override_property (object_class, PROP_SCREEN, "screen");
-  g_object_class_override_property (object_class, PROP_IMMEDIATE, "immediate");
-}
-
-static void
-meta_alt_tab_handler_default_interface_init (MetaAltTabHandlerInterface *handler_iface)
-{
-  handler_iface->add_window   = meta_alt_tab_handler_default_add_window;
-  handler_iface->show         = meta_alt_tab_handler_default_show;
-  handler_iface->destroy      = meta_alt_tab_handler_default_destroy;
-  handler_iface->forward      = meta_alt_tab_handler_default_forward;
-  handler_iface->backward     = meta_alt_tab_handler_default_backward;
-  handler_iface->get_selected = meta_alt_tab_handler_default_get_selected;
-}

src/core/bell.c

@@ -51,7 +51,10 @@
 #include <config.h>
 #include "bell.h"
 #include "screen-private.h"
-#include "prefs.h"
+#include <meta/prefs.h>
+#ifdef HAVE_LIBCANBERRA
+#include <canberra-gtk.h>
+#endif
 
 /**
  * Flashes one entire screen.  This is done by making a window the size of the
@@ -146,7 +149,7 @@ bell_flash_screen (MetaDisplay *display,
 #ifdef HAVE_XKB
 static void
 bell_flash_fullscreen (MetaDisplay *display, 
-			    XkbAnyEvent *xkb_ev)
+                       XkbAnyEvent *xkb_ev)
 {
   XkbBellNotifyEvent *xkb_bell_ev = (XkbBellNotifyEvent *) xkb_ev;
   MetaScreen *screen;
@@ -156,7 +159,12 @@ bell_flash_fullscreen (MetaDisplay *display,
     {
       screen = meta_display_screen_for_xwindow (display, xkb_bell_ev->window);
       if (screen)
-	bell_flash_screen (display, screen);
+        {
+          if (display->compositor)
+            meta_compositor_flash_screen (display->compositor, screen);
+          else
+            bell_flash_screen (display, screen);
+        }
     }
   else 
     {
@@ -164,7 +172,10 @@ bell_flash_fullscreen (MetaDisplay *display,
       while (screen_list) 
 	{
 	  screen = (MetaScreen *) screen_list->data;
-	  bell_flash_screen (display, screen);
+          if (display->compositor)
+            meta_compositor_flash_screen (display->compositor, screen);
+          else
+            bell_flash_screen (display, screen);
 	  screen_list = screen_list->next;
 	}
     }
@@ -228,18 +239,18 @@ bell_flash_window_frame (MetaWindow *window)
  */
 static void
 bell_flash_frame (MetaDisplay *display, 
-		       XkbAnyEvent *xkb_ev)
+		  XkbAnyEvent *xkb_ev)
 {
   XkbBellNotifyEvent *xkb_bell_event = (XkbBellNotifyEvent *) xkb_ev;
   MetaWindow *window;
   
   g_assert (xkb_ev->xkb_type == XkbBellNotify);
   window = meta_display_lookup_x_window (display, xkb_bell_event->window);
-  if (!window && (display->focus_window) && (display->focus_window->frame))
+  if (!window && (display->focus_window))
     {
       window = display->focus_window;
     }
-  if (window)
+  if (window && window->frame)
     {
       bell_flash_window_frame (window);
     }
@@ -285,6 +296,48 @@ meta_bell_notify (MetaDisplay *display,
   /* flash something */
   if (meta_prefs_get_visual_bell ()) 
     bell_visual_notify (display, xkb_ev);
+
+#ifdef HAVE_LIBCANBERRA
+  if (meta_prefs_bell_is_audible ())
+    {
+      ca_proplist *p;
+      XkbBellNotifyEvent *xkb_bell_event = (XkbBellNotifyEvent*) xkb_ev;
+      MetaWindow *window;
+      int res;
+
+      ca_proplist_create (&p);
+      ca_proplist_sets (p, CA_PROP_EVENT_ID, "bell-window-system");
+      ca_proplist_sets (p, CA_PROP_EVENT_DESCRIPTION, _("Bell event"));
+      ca_proplist_sets (p, CA_PROP_CANBERRA_CACHE_CONTROL, "permanent");
+
+      window = meta_display_lookup_x_window (display, xkb_bell_event->window);
+      if (!window && (display->focus_window) && (display->focus_window->frame))
+        window = display->focus_window;
+
+      if (window)
+        {
+          ca_proplist_sets (p, CA_PROP_WINDOW_NAME, window->title);
+          ca_proplist_setf (p, CA_PROP_WINDOW_X11_XID, "%lu", (unsigned long)window->xwindow);
+          ca_proplist_sets (p, CA_PROP_APPLICATION_NAME, window->res_name);
+          ca_proplist_setf (p, CA_PROP_APPLICATION_PROCESS_ID, "%d", window->net_wm_pid);
+        }
+
+      /* First, we try to play a real sound ... */
+      res = ca_context_play_full (ca_gtk_context_get (), 1, p, NULL, NULL);
+
+      ca_proplist_destroy (p);
+
+      if (res != CA_SUCCESS && res != CA_ERROR_DISABLED)
+        {
+          /* ...and in case that failed we use the classic X11 bell. */
+          XkbForceDeviceBell (display->xdisplay,
+                              xkb_bell_event->device,
+                              xkb_bell_event->bell_class,
+                              xkb_bell_event->bell_id,
+                              xkb_bell_event->percent);
+        }
+    }
+#endif /* HAVE_LIBCANBERRA */
 }
 #endif /* HAVE_XKB */
 
@@ -292,11 +345,19 @@ void
 meta_bell_set_audible (MetaDisplay *display, gboolean audible)
 {
 #ifdef HAVE_XKB
+#ifdef HAVE_LIBCANBERRA
+  /* When we are playing sounds using libcanberra support, we handle the
+   * bell whether its an audible bell or a visible bell */
+  gboolean enable_system_bell = FALSE;
+#else
+  gboolean enable_system_bell = audible;
+#endif /* HAVE_LIBCANBERRA */
+
   XkbChangeEnabledControls (display->xdisplay,
-			    XkbUseCoreKbd,
-			    XkbAudibleBellMask,
-			    audible ? XkbAudibleBellMask : 0);
-#endif  
+                            XkbUseCoreKbd,
+                            XkbAudibleBellMask,
+                            enable_system_bell ? XkbAudibleBellMask : 0);
+#endif /* HAVE_XKB */
 }
 
 gboolean
@@ -323,11 +384,7 @@ meta_bell_init (MetaDisplay *display)
 		       XkbUseCoreKbd,
 		       XkbBellNotifyMask,
 		       XkbBellNotifyMask);
-      XkbChangeEnabledControls (display->xdisplay,
-				XkbUseCoreKbd,
-				XkbAudibleBellMask,
-				meta_prefs_bell_is_audible () 
-				? XkbAudibleBellMask : 0);
+      meta_bell_set_audible (display, meta_prefs_bell_is_audible ());
       if (visual_bell_auto_reset) {
 	XkbSetAutoResetControls (display->xdisplay,
 				 XkbAudibleBellMask,

src/core/bell.h

@@ -36,7 +36,7 @@
 #include <X11/XKBlib.h>
 #endif
 #include "display-private.h"
-#include "frame-private.h"
+#include "frame.h"
 
 #ifdef HAVE_XKB
 /**

src/core/boxes-private.h

@@ -21,27 +21,12 @@
  * 02111-1307, USA.
  */
 
-#ifndef META_BOXES_H
-#define META_BOXES_H
+#ifndef META_BOXES_PRIVATE_H
+#define META_BOXES_PRIVATE_H
 
-#include <glib.h>
-#include "common.h"
-
-typedef struct _MetaRectangle MetaRectangle;
-struct _MetaRectangle
-{
-  int x;
-  int y;
-  int width;
-  int height;
-};
-
-typedef struct _MetaStrut MetaStrut;
-struct _MetaStrut
-{
-  MetaRectangle rect;
-  MetaSide side;
-};
+#include <glib-object.h>
+#include <meta/common.h>
+#include <meta/boxes.h>
 
 #define BOX_LEFT(box)    ((box).x)                /* Leftmost pixel of rect */
 #define BOX_RIGHT(box)   ((box).x + (box).width)  /* One pixel past right   */
@@ -55,21 +40,6 @@ typedef enum
   FIXED_DIRECTION_Y    = 1 << 1,
 } FixedDirections;
 
-typedef enum
-{
-  META_EDGE_WINDOW,
-  META_EDGE_XINERAMA,
-  META_EDGE_SCREEN
-} MetaEdgeType;
-
-typedef struct _MetaEdge MetaEdge;
-struct _MetaEdge
-{
-  MetaRectangle rect;      /* width or height should be 1 */
-  MetaSide side_type;
-  MetaEdgeType  edge_type;
-};
-
 /* Output functions -- note that the output buffer had better be big enough:
  *   rect_to_string:   RECT_LENGTH
  *   region_to_string: (RECT_LENGTH+strlen(separator_string)) *
@@ -92,46 +62,6 @@ char* meta_rectangle_edge_list_to_string (
                                        const char          *separator_string,
                                        char                *output);
 
-/* Function to make initializing a rect with a single line of code easy */
-MetaRectangle                 meta_rect (int x, int y, int width, int height);
-
-/* Basic comparison functions */
-int      meta_rectangle_area            (const MetaRectangle *rect);
-gboolean meta_rectangle_intersect       (const MetaRectangle *src1,
-                                         const MetaRectangle *src2,
-                                         MetaRectangle       *dest);
-gboolean meta_rectangle_equal           (const MetaRectangle *src1,
-                                         const MetaRectangle *src2);
-
-/* Find the bounding box of the union of two rectangles */
-void     meta_rectangle_union           (const MetaRectangle *rect1,
-                                         const MetaRectangle *rect2,
-                                         MetaRectangle       *dest);
-
-/* overlap is similar to intersect but doesn't provide location of
- * intersection information.
- */
-gboolean meta_rectangle_overlap         (const MetaRectangle *rect1,
-                                         const MetaRectangle *rect2);
-
-/* vert_overlap means ignore the horizontal location and ask if the
- * vertical parts overlap.  An alternate way to think of it is "Does there
- * exist a way to shift either rect horizontally so that the two rects
- * overlap?"  horiz_overlap is similar.
- */
-gboolean meta_rectangle_vert_overlap    (const MetaRectangle *rect1,
-                                         const MetaRectangle *rect2);
-gboolean meta_rectangle_horiz_overlap   (const MetaRectangle *rect1,
-                                         const MetaRectangle *rect2);
-
-/* could_fit_rect determines whether "outer_rect" is big enough to contain
- * inner_rect.  contains_rect checks whether it actually contains it.
- */
-gboolean meta_rectangle_could_fit_rect  (const MetaRectangle *outer_rect,
-                                         const MetaRectangle *inner_rect);
-gboolean meta_rectangle_contains_rect   (const MetaRectangle *outer_rect,
-                                         const MetaRectangle *inner_rect);
-
 /* Resize old_rect to the given new_width and new_height, but store the
  * result in rect.  NOTE THAT THIS IS RESIZE ONLY SO IT CANNOT BE USED FOR
  * A MOVERESIZE OPERATION (that simplies the routine a little bit as it
@@ -193,7 +123,7 @@ void     meta_rectangle_expand_to_avoiding_struts (
  * or
  *   meta_rectangle_find_onscreen_edges ()
  * or
- *   meta_rectangle_find_nonintersected_xinerama_edges()
+ *   meta_rectangle_find_nonintersected_monitor_edges()
  */
 void     meta_rectangle_free_list_and_elements (GList *filled_list);
 
@@ -280,11 +210,11 @@ GList* meta_rectangle_remove_intersections_with_boxes_from_edges (
 GList* meta_rectangle_find_onscreen_edges (const MetaRectangle *basic_rect,
                                            const GSList        *all_struts);
 
-/* Finds edges between adjacent xineramas which are not covered by the given
+/* Finds edges between adjacent monitors which are not covered by the given
  * struts.
  */
-GList* meta_rectangle_find_nonintersected_xinerama_edges (
-                                           const GList         *xinerama_rects,
+GList* meta_rectangle_find_nonintersected_monitor_edges (
+                                           const GList         *monitor_rects,
                                            const GSList        *all_struts);
 
-#endif /* META_BOXES_H */
+#endif /* META_BOXES_PRIVATE_H */

src/core/boxes.c

@@ -26,10 +26,39 @@
  * 02111-1307, USA.
  */
 
-#include "boxes.h"
-#include "util.h"
+#include "boxes-private.h"
+#include <meta/util.h>
 #include <X11/Xutil.h>  /* Just for the definition of the various gravities */
 
+/* It would make sense to use GSlice here, but until we clean up the
+ * rest of this file and the internal API to use these functions, we
+ * leave it using g_malloc()/g_free() for consistency.
+ */
+
+MetaRectangle *
+meta_rectangle_copy (const MetaRectangle *rect)
+{
+  return g_memdup (rect, sizeof (MetaRectangle));
+}
+
+void
+meta_rectangle_free (MetaRectangle *rect)
+{
+  g_free (rect);
+}
+
+GType
+meta_rectangle_get_type (void)
+{
+  static GType type_id = 0;
+
+  if (!type_id)
+    type_id = g_boxed_type_register_static (g_intern_static_string ("MetaRectangle"),
+					    (GBoxedCopyFunc) meta_rectangle_copy,
+					    (GBoxedFreeFunc) meta_rectangle_free);
+  return type_id;
+}
+
 char*
 meta_rectangle_to_string (const MetaRectangle *rect,
                           char                *output)
@@ -150,6 +179,16 @@ meta_rectangle_area (const MetaRectangle *rect)
   return rect->width * rect->height;
 }
 
+/**
+ * meta_rectangle_intersect:
+ * @src1: a #MetaRectangle
+ * @src2: another #MetaRectangle
+ * @dest: (out caller-allocates): an empty #MetaRectangle, to be filled
+ *   with the coordinates of the intersection.
+ *
+ * Returns: TRUE is some intersection exists and is not degenerate, FALSE
+ *   otherwise.
+ */
 gboolean
 meta_rectangle_intersect (const MetaRectangle *src1,
 			  const MetaRectangle *src2,
@@ -197,6 +236,13 @@ meta_rectangle_equal (const MetaRectangle *src1,
           (src1->height == src2->height));
 }
 
+/**
+ * meta_rectangle_union:
+ * @rect1: a #MetaRectangle
+ * @rect2: another #MetaRectangle
+ * @dest: (out caller-allocates): an empty #MetaRectangle, to be filled
+ *   with the coordinates of the bounding box.
+ */
 void
 meta_rectangle_union (const MetaRectangle *rect1,
                       const MetaRectangle *rect2,
@@ -311,7 +357,6 @@ meta_rectangle_resize_with_gravity (const MetaRectangle *old_rect,
    */
 
   /* First, the x direction */
-  int adjust = 0;
   switch (gravity)
     {
     case NorthWestGravity:
@@ -344,7 +389,6 @@ meta_rectangle_resize_with_gravity (const MetaRectangle *old_rect,
   rect->width = new_width;
   
   /* Next, the y direction */
-  adjust = 0;
   switch (gravity)
     {
     case NorthWestGravity:
@@ -500,7 +544,12 @@ compare_rect_areas (gconstpointer a, gconstpointer b)
   return b_area - a_area; /* positive ret value denotes b > a, ... */
 }
 
-/* This function is trying to find a "minimal spanning set (of rectangles)"
+/**
+ * meta_rectangle_get_minimal_spanning_set_for_region:
+ * @basic_rect: Input rectangle
+ * @all_struts: (element-type Meta.Rectangle): List of struts
+ *
+ * This function is trying to find a "minimal spanning set (of rectangles)"
  * for a given region.
  *
  * The region is given by taking basic_rect, then removing the areas
@@ -513,10 +562,7 @@ compare_rect_areas (gconstpointer a, gconstpointer b)
  * the region if and only if it is contained within at least one of the
  * rectangles.
  *
- * The GList* returned will be a list of (allocated) MetaRectangles.
- * The list will need to be freed by calling
- * meta_rectangle_free_spanning_set() on it (or by manually
- * implementing that function...)
+ * Returns: (transfer full) (element-type Meta.Rectangle): Minimal spanning set
  */
 GList*
 meta_rectangle_get_minimal_spanning_set_for_region (
@@ -535,7 +581,7 @@ meta_rectangle_get_minimal_spanning_set_for_region (
    * enough to make this worth bothering.  Further, it is only called from
    * workspace.c:ensure_work_areas_validated (at least as of the time of
    * writing this comment), which in turn should only be called if the
-   * strut list changes or the screen or xinerama size changes.  If it ever
+   * strut list changes or the screen or monitor size changes.  If it ever
    * does show up on profiles (most likely because people start using
    * ridiculously huge numbers of partial struts), possible optimizations
    * include:
@@ -649,6 +695,10 @@ meta_rectangle_get_minimal_spanning_set_for_region (
   return ret;
 }
 
+/**
+ * meta_rectangle_expand_region: (skip)
+ *
+ */
 GList*
 meta_rectangle_expand_region (GList     *region,
                               const int  left_expand,
@@ -665,6 +715,10 @@ meta_rectangle_expand_region (GList     *region,
                                                      0);
 }
 
+/**
+ * meta_rectangle_expand_region_conditionally: (skip)
+ *
+ */
 GList*
 meta_rectangle_expand_region_conditionally (GList     *region,
                                             const int  left_expand,
@@ -1642,7 +1696,10 @@ fix_up_edges (MetaRectangle *rect,         MetaEdge *edge,
     }
 }
 
-/* This function removes intersections of edges with the rectangles from the
+/**
+ * meta_rectangle_remove_intersections_with_boxes_from_edges: (skip)
+ *
+ * This function removes intersections of edges with the rectangles from the
  * list of edges.
  */
 GList*
@@ -1708,7 +1765,11 @@ meta_rectangle_remove_intersections_with_boxes_from_edges (
   return edges;
 }
 
-/* This function is trying to find all the edges of an onscreen region. */
+/**
+ * meta_rectangle_find_onscreen_edges: (skip)
+ *
+ * This function is trying to find all the edges of an onscreen region.
+ */
 GList*
 meta_rectangle_find_onscreen_edges (const MetaRectangle *basic_rect,
                                     const GSList        *all_struts)
@@ -1791,15 +1852,19 @@ meta_rectangle_find_onscreen_edges (const MetaRectangle *basic_rect,
   return ret;
 }
 
+/**
+ * meta_rectangle_find_nonintersected_monitor_edges: (skip)
+ *
+ */
 GList*
-meta_rectangle_find_nonintersected_xinerama_edges (
-                                    const GList         *xinerama_rects,
+meta_rectangle_find_nonintersected_monitor_edges (
+                                    const GList         *monitor_rects,
                                     const GSList        *all_struts)
 {
   /* This function cannot easily be merged with
    * meta_rectangle_find_onscreen_edges() because real screen edges
    * and strut edges both are of the type "there ain't anything
-   * immediately on the other side"; xinerama edges are different.
+   * immediately on the other side"; monitor edges are different.
    */
   GList *ret;
   const GList  *cur;
@@ -1808,14 +1873,14 @@ meta_rectangle_find_nonintersected_xinerama_edges (
   /* Initialize the return list to be empty */
   ret = NULL;
 
-  /* start of ret with all the edges of xineramas that are adjacent to
-   * another xinerama.
+  /* start of ret with all the edges of monitors that are adjacent to
+   * another monitor.
    */
-  cur = xinerama_rects;
+  cur = monitor_rects;
   while (cur)
     {
       MetaRectangle *cur_rect = cur->data;
-      const GList *compare = xinerama_rects;
+      const GList *compare = monitor_rects;
       while (compare)
         {
           MetaRectangle *compare_rect = compare->data;
@@ -1849,15 +1914,15 @@ meta_rectangle_find_nonintersected_xinerama_edges (
               /* If the rectangles really are adjacent */
               if (x != INT_MIN)
                 {
-                  /* We need a left edge for the xinerama on the right, and
-                   * a right edge for the xinerama on the left.  Just fill
+                  /* We need a left edge for the monitor on the right, and
+                   * a right edge for the monitor on the left.  Just fill
                    * up the edges and stick 'em on the list.
                    */
                   MetaEdge *new_edge  = g_new (MetaEdge, 1);
 
                   new_edge->rect = meta_rect (x, y, width, height);
                   new_edge->side_type = side_type;
-                  new_edge->edge_type = META_EDGE_XINERAMA;
+                  new_edge->edge_type = META_EDGE_MONITOR;
 
                   ret = g_list_prepend (ret, new_edge);
                 }
@@ -1892,15 +1957,15 @@ meta_rectangle_find_nonintersected_xinerama_edges (
               /* If the rectangles really are adjacent */
               if (y != INT_MIN)
                 {
-                  /* We need a top edge for the xinerama on the bottom, and
-                   * a bottom edge for the xinerama on the top.  Just fill
+                  /* We need a top edge for the monitor on the bottom, and
+                   * a bottom edge for the monitor on the top.  Just fill
                    * up the edges and stick 'em on the list.
                    */
                   MetaEdge *new_edge = g_new (MetaEdge, 1);
 
                   new_edge->rect = meta_rect (x, y, width, height);
                   new_edge->side_type = side_type;
-                  new_edge->edge_type = META_EDGE_XINERAMA;
+                  new_edge->edge_type = META_EDGE_MONITOR;
 
                   ret = g_list_prepend (ret, new_edge);
                 }

src/core/constraints.c

@@ -24,9 +24,11 @@
  */
 
 #include <config.h>
+#include "boxes-private.h"
 #include "constraints.h"
 #include "workspace-private.h"
 #include "place.h"
+#include <meta/prefs.h>
 
 #include <stdlib.h>
 #include <math.h>
@@ -93,10 +95,11 @@ typedef enum
 {
   PRIORITY_MINIMUM = 0, /* Dummy value used for loop start = min(all priorities) */
   PRIORITY_ASPECT_RATIO = 0,
-  PRIORITY_ENTIRELY_VISIBLE_ON_SINGLE_XINERAMA = 0,
+  PRIORITY_ENTIRELY_VISIBLE_ON_SINGLE_MONITOR = 0,
   PRIORITY_ENTIRELY_VISIBLE_ON_WORKAREA = 1,
   PRIORITY_SIZE_HINTS_INCREMENTS = 1,
   PRIORITY_MAXIMIZATION = 2,
+  PRIORITY_TILING = 2,
   PRIORITY_FULLSCREEN = 2,
   PRIORITY_SIZE_HINTS_LIMITS = 3,
   PRIORITY_TITLEBAR_VISIBLE = 4,
@@ -127,23 +130,35 @@ typedef struct
   int                  resize_gravity;
   FixedDirections      fixed_directions;
 
-  /* work_area_xinerama - current xinerama region minus struts
-   * entire_xinerama    - current xienrama, including strut regions
+  /* work_area_monitor - current monitor region minus struts
+   * entire_monitor    - current monitor, including strut regions
    */
-  MetaRectangle        work_area_xinerama;
-  MetaRectangle        entire_xinerama;
+  MetaRectangle        work_area_monitor;
+  MetaRectangle        entire_monitor;
 
   /* Spanning rectangles for the non-covered (by struts) region of the
-   * screen and also for just the current xinerama
+   * screen and also for just the current monitor
    */
   GList  *usable_screen_region;
-  GList  *usable_xinerama_region;
+  GList  *usable_monitor_region;
 } ConstraintInfo;
 
+static gboolean do_screen_and_monitor_relative_constraints (MetaWindow     *window,
+                                                            GList          *region_spanning_rectangles,
+                                                            ConstraintInfo *info,
+                                                            gboolean        check_only);
+static gboolean constrain_modal_dialog       (MetaWindow         *window,
+                                              ConstraintInfo     *info,
+                                              ConstraintPriority  priority,
+                                              gboolean            check_only);
 static gboolean constrain_maximization       (MetaWindow         *window,
                                               ConstraintInfo     *info,
                                               ConstraintPriority  priority,
                                               gboolean            check_only);
+static gboolean constrain_tiling             (MetaWindow         *window,
+                                              ConstraintInfo     *info,
+                                              ConstraintPriority  priority,
+                                              gboolean            check_only);
 static gboolean constrain_fullscreen         (MetaWindow         *window,
                                               ConstraintInfo     *info,
                                               ConstraintPriority  priority,
@@ -160,7 +175,7 @@ static gboolean constrain_aspect_ratio       (MetaWindow         *window,
                                               ConstraintInfo     *info,
                                               ConstraintPriority  priority,
                                               gboolean            check_only);
-static gboolean constrain_to_single_xinerama (MetaWindow         *window,
+static gboolean constrain_to_single_monitor  (MetaWindow         *window,
                                               ConstraintInfo     *info,
                                               ConstraintPriority  priority,
                                               gboolean            check_only);
@@ -209,12 +224,14 @@ typedef struct {
 } Constraint;
 
 static const Constraint all_constraints[] = {
+  {constrain_modal_dialog,       "constrain_modal_dialog"},
   {constrain_maximization,       "constrain_maximization"},
+  {constrain_tiling,             "constrain_tiling"},
   {constrain_fullscreen,         "constrain_fullscreen"},
   {constrain_size_increments,    "constrain_size_increments"},
   {constrain_size_limits,        "constrain_size_limits"},
   {constrain_aspect_ratio,       "constrain_aspect_ratio"},
-  {constrain_to_single_xinerama, "constrain_to_single_xinerama"},
+  {constrain_to_single_monitor,  "constrain_to_single_monitor"},
   {constrain_fully_onscreen,     "constrain_fully_onscreen"},
   {constrain_titlebar_visible,   "constrain_titlebar_visible"},
   {constrain_partially_onscreen, "constrain_partially_onscreen"},
@@ -311,7 +328,7 @@ meta_window_constrain (MetaWindow          *window,
   *new = info.current;
 
   /* We may need to update window->require_fully_onscreen,
-   * window->require_on_single_xinerama, and perhaps other quantities
+   * window->require_on_single_monitor, and perhaps other quantities
    * if this was a user move or user move-and-resize operation.
    */
   update_onscreen_requirements (window, &info);
@@ -333,7 +350,7 @@ setup_constraint_info (ConstraintInfo      *info,
                        const MetaRectangle *orig,
                        MetaRectangle       *new)
 {
-  const MetaXineramaScreenInfo *xinerama_info;
+  const MetaMonitorInfo *monitor_info;
   MetaWorkspace *cur_workspace;
 
   info->orig    = *orig;
@@ -387,15 +404,15 @@ setup_constraint_info (ConstraintInfo      *info,
   if (!info->is_user_action)
     info->fixed_directions = FIXED_DIRECTION_NONE;
 
-  xinerama_info =
-    meta_screen_get_xinerama_for_rect (window->screen, &info->current);
-  meta_window_get_work_area_for_xinerama (window,
-                                          xinerama_info->number,
-                                          &info->work_area_xinerama);
+  monitor_info =
+    meta_screen_get_monitor_for_rect (window->screen, &info->current);
+  meta_window_get_work_area_for_monitor (window,
+                                         monitor_info->number,
+                                         &info->work_area_monitor);
 
   if (!window->fullscreen || window->fullscreen_monitors[0] == -1)
     {
-      info->entire_xinerama = xinerama_info->rect;
+      info->entire_monitor = monitor_info->rect;
     }
   else
     {
@@ -403,28 +420,29 @@ setup_constraint_info (ConstraintInfo      *info,
       long monitor;
 
       monitor = window->fullscreen_monitors[i];
-      info->entire_xinerama =
-        window->screen->xinerama_infos[monitor].rect;
+      info->entire_monitor =
+        window->screen->monitor_infos[monitor].rect;
       for (i = 1; i <= 3; i++)
         {
           monitor = window->fullscreen_monitors[i];
-          meta_rectangle_union (&info->entire_xinerama,
-                                &window->screen->xinerama_infos[monitor].rect,
-                                &info->entire_xinerama);
+          meta_rectangle_union (&info->entire_monitor,
+                                &window->screen->monitor_infos[monitor].rect,
+                                &info->entire_monitor);
         }
     }
 
   cur_workspace = window->screen->active_workspace;
   info->usable_screen_region   = 
     meta_workspace_get_onscreen_region (cur_workspace);
-  info->usable_xinerama_region = 
-    meta_workspace_get_onxinerama_region (cur_workspace, 
-                                          xinerama_info->number);
+  info->usable_monitor_region = 
+    meta_workspace_get_onmonitor_region (cur_workspace, 
+                                         monitor_info->number);
 
   /* Workaround braindead legacy apps that don't know how to
    * fullscreen themselves properly.
    */
-  if (meta_rectangle_equal (new, &xinerama_info->rect) &&
+  if (meta_prefs_get_force_fullscreen() &&
+      meta_rectangle_equal (new, &monitor_info->rect) &&
       window->has_fullscreen_func &&
       !window->fullscreen)
     {
@@ -448,8 +466,8 @@ setup_constraint_info (ConstraintInfo      *info,
               "  is_user_action  : %s\n"
               "  resize_gravity  : %s\n"
               "  fixed_directions: %s\n"
-              "  work_area_xinerama: %d,%d +%d,%d\n"
-              "  entire_xinerama   : %d,%d +%d,%d\n",
+              "  work_area_monitor: %d,%d +%d,%d\n"
+              "  entire_monitor   : %d,%d +%d,%d\n",
               info->orig.x, info->orig.y, info->orig.width, info->orig.height,
               info->current.x, info->current.y, 
                 info->current.width, info->current.height,
@@ -465,11 +483,11 @@ setup_constraint_info (ConstraintInfo      *info,
                 (info->fixed_directions == FIXED_DIRECTION_X) ? "X fixed" :
                 (info->fixed_directions == FIXED_DIRECTION_Y) ? "Y fixed" :
                 "Freakin' Invalid Stupid",
-              info->work_area_xinerama.x, info->work_area_xinerama.y,
-                info->work_area_xinerama.width, 
-                info->work_area_xinerama.height,
-              info->entire_xinerama.x, info->entire_xinerama.y,
-                info->entire_xinerama.width, info->entire_xinerama.height);
+              info->work_area_monitor.x, info->work_area_monitor.y,
+                info->work_area_monitor.width, 
+                info->work_area_monitor.height,
+              info->entire_monitor.x, info->entire_monitor.y,
+                info->entire_monitor.width, info->entire_monitor.height);
 }
 
 static void
@@ -493,25 +511,25 @@ place_window_if_needed(MetaWindow     *window,
     {
       MetaRectangle placed_rect = info->orig;
       MetaWorkspace *cur_workspace;
-      const MetaXineramaScreenInfo *xinerama_info;
+      const MetaMonitorInfo *monitor_info;
 
       meta_window_place (window, info->fgeom, info->orig.x, info->orig.y,
                          &placed_rect.x, &placed_rect.y);
       did_placement = TRUE;
 
-      /* placing the window may have changed the xinerama.  Find the
-       * new xinerama and update the ConstraintInfo
+      /* placing the window may have changed the monitor.  Find the
+       * new monitor and update the ConstraintInfo
        */
-      xinerama_info =
-        meta_screen_get_xinerama_for_rect (window->screen, &placed_rect);
-      info->entire_xinerama = xinerama_info->rect;
-      meta_window_get_work_area_for_xinerama (window,
-                                              xinerama_info->number,
-                                              &info->work_area_xinerama);
+      monitor_info =
+        meta_screen_get_monitor_for_rect (window->screen, &placed_rect);
+      info->entire_monitor = monitor_info->rect;
+      meta_window_get_work_area_for_monitor (window,
+                                             monitor_info->number,
+                                             &info->work_area_monitor);
       cur_workspace = window->screen->active_workspace;
-      info->usable_xinerama_region = 
-        meta_workspace_get_onxinerama_region (cur_workspace, 
-                                              xinerama_info->number);
+      info->usable_monitor_region = 
+        meta_workspace_get_onmonitor_region (cur_workspace, 
+                                             monitor_info->number);
 
 
       info->current.x = placed_rect.x;
@@ -526,22 +544,23 @@ place_window_if_needed(MetaWindow     *window,
   if (window->placed || did_placement)
     {
       if (window->maximize_horizontally_after_placement ||
-          window->maximize_vertically_after_placement)
+          window->maximize_vertically_after_placement   ||
+          window->fullscreen_after_placement)
         {
-          /* define a sane saved_rect so that the user can unmaximize to
-           * something reasonable.
+          /* define a sane saved_rect so that the user can unmaximize or
+           * make unfullscreen to something reasonable.
            */
-          if (info->current.width >= info->work_area_xinerama.width)
+          if (info->current.width >= info->work_area_monitor.width)
             {
-              info->current.width = .75 * info->work_area_xinerama.width;
-              info->current.x = info->work_area_xinerama.x +
-                       .125 * info->work_area_xinerama.width;
+              info->current.width = .75 * info->work_area_monitor.width;
+              info->current.x = info->work_area_monitor.x +
+                       .125 * info->work_area_monitor.width;
             }
-          if (info->current.height >= info->work_area_xinerama.height)
+          if (info->current.height >= info->work_area_monitor.height)
             {
-              info->current.height = .75 * info->work_area_xinerama.height;
-              info->current.y = info->work_area_xinerama.y +
-                       .083 * info->work_area_xinerama.height;
+              info->current.height = .75 * info->work_area_monitor.height;
+              info->current.y = info->work_area_monitor.y +
+                       .083 * info->work_area_monitor.height;
             }
 
           if (window->maximize_horizontally_after_placement ||
@@ -556,6 +575,15 @@ place_window_if_needed(MetaWindow     *window,
           if (window->frame && !window->fullscreen)
             meta_frame_calc_geometry (window->frame, info->fgeom);
 
+          if (window->fullscreen_after_placement)
+            {
+              window->saved_rect = info->current;
+              window->fullscreen = TRUE;
+              window->fullscreen_after_placement = FALSE;
+
+              g_object_notify (G_OBJECT (window), "fullscreen");
+            }
+
           window->maximize_horizontally_after_placement = FALSE;
           window->maximize_vertically_after_placement = FALSE;
         }
@@ -589,7 +617,7 @@ update_onscreen_requirements (MetaWindow     *window,
     return;
 
   /* USABILITY NOTE: Naturally, I only want the require_fully_onscreen,
-   * require_on_single_xinerama, and require_titlebar_visible flags to
+   * require_on_single_monitor, and require_titlebar_visible flags to
    * *become false* due to user interactions (which is allowed since
    * certain constraints are ignored for user interactions regardless of
    * the setting of these flags).  However, whether to make these flags
@@ -603,7 +631,7 @@ update_onscreen_requirements (MetaWindow     *window,
    * problematic case but this may need to be revisited.
    */
 
-  /* The require onscreen/on-single-xinerama and titlebar_visible
+  /* 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->fgeom);
@@ -622,17 +650,17 @@ update_onscreen_requirements (MetaWindow     *window,
                 window->require_fully_onscreen ? "TRUE" : "FALSE");
 
   /* Update whether we want future constraint runs to require the
-   * window to be on a single xinerama.
+   * window to be on a single monitor.
    */
-  old = window->require_on_single_xinerama;
-  window->require_on_single_xinerama =
-    meta_rectangle_contained_in_region (info->usable_xinerama_region,
+  old = window->require_on_single_monitor;
+  window->require_on_single_monitor =
+    meta_rectangle_contained_in_region (info->usable_monitor_region,
                                         &info->current);
-  if (old ^ window->require_on_single_xinerama)
+  if (old ^ window->require_on_single_monitor)
     meta_topic (META_DEBUG_GEOMETRY,
-                "require_on_single_xinerama for %s toggled to %s\n",
+                "require_on_single_monitor for %s toggled to %s\n",
                 window->desc, 
-                window->require_on_single_xinerama ? "TRUE" : "FALSE");
+                window->require_on_single_monitor ? "TRUE" : "FALSE");
 
   /* Update whether we want future constraint runs to require the
    * titlebar to be visible.
@@ -700,11 +728,67 @@ get_size_limits (const MetaWindow        *window,
 
       min_size->width  += fw;
       min_size->height += fh;
-      max_size->width  += fw;
-      max_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;
     }
 }
 
+static gboolean
+constrain_modal_dialog (MetaWindow         *window,
+                        ConstraintInfo     *info,
+                        ConstraintPriority  priority,
+                        gboolean            check_only)
+{
+  int x, y;
+  MetaWindow *parent = meta_window_get_transient_for (window);
+  gboolean constraint_already_satisfied;
+
+  if (!meta_prefs_get_attach_modal_dialogs ())
+    return TRUE;
+  if (window->type != META_WINDOW_MODAL_DIALOG || !parent || parent == window)
+    return TRUE;
+
+  x = parent->rect.x + (parent->rect.width / 2  - info->current.width / 2);
+  y = 0;
+  if (parent->frame)
+    {
+      MetaFrameGeometry fgeom;
+
+      x += parent->frame->rect.x;
+      y += parent->frame->rect.y;
+
+      meta_frame_calc_geometry (parent->frame, &fgeom);
+      y += fgeom.top_height;
+
+      y += info->fgeom->top_height;
+    }
+  else
+    y = parent->rect.y + info->fgeom->top_height;
+
+  constraint_already_satisfied = (x == info->current.x) && (y == info->current.y);
+
+  if (check_only || constraint_already_satisfied)
+    return constraint_already_satisfied;
+
+  info->current.y = y;
+  info->current.x = x;
+  /* The calculated position above may need adjustment to make sure the
+   * dialog does not end up partially off-screen */
+  return do_screen_and_monitor_relative_constraints (window,
+                                                     info->usable_screen_region,
+                                                     info,
+                                                     check_only);
+}
+
 static gboolean
 constrain_maximization (MetaWindow         *window,
                         ConstraintInfo     *info,
@@ -721,12 +805,13 @@ constrain_maximization (MetaWindow         *window,
     return TRUE;
 
   /* Determine whether constraint applies; exit if it doesn't */
-  if (!window->maximized_horizontally && !window->maximized_vertically)
+  if ((!window->maximized_horizontally && !window->maximized_vertically) ||
+      META_WINDOW_TILED_SIDE_BY_SIDE (window))
     return TRUE;
 
   /* Calculate target_size = maximized size of (window + frame) */
   if (window->maximized_horizontally && window->maximized_vertically)
-    target_size = info->work_area_xinerama;
+    target_size = info->work_area_monitor;
   else
     {
       /* Amount of maximization possible in a single direction depends
@@ -748,7 +833,7 @@ constrain_maximization (MetaWindow         *window,
       target_size = info->current;
       extend_by_frame (&target_size, info->fgeom);
       meta_rectangle_expand_to_avoiding_struts (&target_size,
-                                                &info->entire_xinerama,
+                                                &info->entire_monitor,
                                                 direction,
                                                 active_workspace_struts);
    }
@@ -789,13 +874,66 @@ constrain_maximization (MetaWindow         *window,
   return TRUE;
 }
 
+static gboolean
+constrain_tiling (MetaWindow         *window,
+                  ConstraintInfo     *info,
+                  ConstraintPriority  priority,
+                  gboolean            check_only)
+{
+  MetaRectangle target_size;
+  MetaRectangle min_size, max_size;
+  gboolean hminbad, vminbad;
+  gboolean horiz_equal, vert_equal;
+  gboolean constraint_already_satisfied;
+
+  if (priority > PRIORITY_TILING)
+    return TRUE;
+
+  /* Determine whether constraint applies; exit if it doesn't */
+  if (!META_WINDOW_TILED_SIDE_BY_SIDE (window))
+    return TRUE;
+
+  /* Calculate target_size - as the tile previews need this as well, we
+   * use an external function for the actual calculation
+   */
+  meta_window_get_current_tile_area (window, &target_size);
+  unextend_by_frame (&target_size, info->fgeom);
+
+  /* Check min size constraints; max size constraints are ignored as for
+   * maximized windows.
+   */
+  get_size_limits (window, info->fgeom, FALSE, &min_size, &max_size);
+  hminbad = target_size.width < min_size.width;
+  vminbad = target_size.height < min_size.height;
+  if (hminbad || vminbad)
+    return TRUE;
+
+  /* Determine whether constraint is already satisfied; exit if it is */
+  horiz_equal = target_size.x      == info->current.x &&
+                target_size.width  == info->current.width;
+  vert_equal  = target_size.y      == info->current.y &&
+                target_size.height == info->current.height;
+  constraint_already_satisfied = horiz_equal && vert_equal;
+  if (check_only || constraint_already_satisfied)
+    return constraint_already_satisfied;
+
+  /*** Enforce constraint ***/
+  info->current.x      = target_size.x;
+  info->current.width  = target_size.width;
+  info->current.y      = target_size.y;
+  info->current.height = target_size.height;
+
+  return TRUE;
+}
+
+
 static gboolean
 constrain_fullscreen (MetaWindow         *window,
                       ConstraintInfo     *info,
                       ConstraintPriority  priority,
                       gboolean            check_only)
 {
-  MetaRectangle min_size, max_size, xinerama;
+  MetaRectangle min_size, max_size, monitor;
   gboolean too_big, too_small, constraint_already_satisfied;
 
   if (priority > PRIORITY_FULLSCREEN)
@@ -805,22 +943,22 @@ constrain_fullscreen (MetaWindow         *window,
   if (!window->fullscreen)
     return TRUE;
 
-  xinerama = info->entire_xinerama;
+  monitor = info->entire_monitor;
 
   get_size_limits (window, info->fgeom, FALSE, &min_size, &max_size);
-  too_big =   !meta_rectangle_could_fit_rect (&xinerama, &min_size);
-  too_small = !meta_rectangle_could_fit_rect (&max_size, &xinerama);
+  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)
     return TRUE;
 
   /* Determine whether constraint is already satisfied; exit if it is */
   constraint_already_satisfied =
-    meta_rectangle_equal (&info->current, &xinerama);
+    meta_rectangle_equal (&info->current, &monitor);
   if (check_only || constraint_already_satisfied)
     return constraint_already_satisfied;
 
   /*** Enforce constraint ***/
-  info->current = xinerama;
+  info->current = monitor;
   return TRUE;
 }
 
@@ -840,6 +978,7 @@ constrain_size_increments (MetaWindow         *window,
 
   /* Determine whether constraint applies; exit if it doesn't */
   if (META_WINDOW_MAXIMIZED (window) || window->fullscreen || 
+      META_WINDOW_TILED_SIDE_BY_SIDE (window) ||
       info->action_type == ACTION_MOVE)
     return TRUE;
 
@@ -971,6 +1110,7 @@ constrain_aspect_ratio (MetaWindow         *window,
   constraints_are_inconsistent = minr > maxr;
   if (constraints_are_inconsistent ||
       META_WINDOW_MAXIMIZED (window) || window->fullscreen || 
+      META_WINDOW_TILED_SIDE_BY_SIDE (window) ||
       info->action_type == ACTION_MOVE)
     return TRUE;
 
@@ -1082,7 +1222,7 @@ constrain_aspect_ratio (MetaWindow         *window,
 }
 
 static gboolean
-do_screen_and_xinerama_relative_constraints (
+do_screen_and_monitor_relative_constraints (
   MetaWindow     *window,
   GList          *region_spanning_rectangles,
   ConstraintInfo *info,
@@ -1098,7 +1238,7 @@ do_screen_and_xinerama_relative_constraints (
       char spanning_region[1 + 28 * g_list_length (region_spanning_rectangles)];
 
       meta_topic (META_DEBUG_GEOMETRY,
-             "screen/xinerama constraint; region_spanning_rectangles: %s\n",
+             "screen/monitor constraint; region_spanning_rectangles: %s\n",
              meta_rectangle_region_to_string (region_spanning_rectangles, ", ",
                                               spanning_region));
     }
@@ -1156,32 +1296,32 @@ do_screen_and_xinerama_relative_constraints (
 }
 
 static gboolean
-constrain_to_single_xinerama (MetaWindow         *window,
-                              ConstraintInfo     *info,
-                              ConstraintPriority  priority,
-                              gboolean            check_only)
+constrain_to_single_monitor (MetaWindow         *window,
+                             ConstraintInfo     *info,
+                             ConstraintPriority  priority,
+                             gboolean            check_only)
 {
-  if (priority > PRIORITY_ENTIRELY_VISIBLE_ON_SINGLE_XINERAMA)
+  if (priority > PRIORITY_ENTIRELY_VISIBLE_ON_SINGLE_MONITOR)
     return TRUE;
 
   /* Exit early if we know the constraint won't apply--note that this constraint
    * is only meant for normal windows (e.g. we don't want docks to be shoved 
    * "onscreen" by their own strut) and we can't apply it to frameless windows
-   * or else users will be unable to move windows such as XMMS across xineramas.
+   * or else users will be unable to move windows such as XMMS across monitors.
    */
   if (window->type == META_WINDOW_DESKTOP   ||
       window->type == META_WINDOW_DOCK      ||
-      window->screen->n_xinerama_infos == 1 ||
-      !window->require_on_single_xinerama   ||
+      window->screen->n_monitor_infos == 1  ||
+      !window->require_on_single_monitor    ||
       !window->frame                        ||
       info->is_user_action)
     return TRUE;
 
   /* Have a helper function handle the constraint for us */
-  return do_screen_and_xinerama_relative_constraints (window, 
-                                                 info->usable_xinerama_region,
-                                                 info,
-                                                 check_only);
+  return do_screen_and_monitor_relative_constraints (window, 
+                                                     info->usable_monitor_region,
+                                                     info,
+                                                     check_only);
 }
 
 static gboolean
@@ -1205,10 +1345,10 @@ constrain_fully_onscreen (MetaWindow         *window,
     return TRUE;
 
   /* Have a helper function handle the constraint for us */
-  return do_screen_and_xinerama_relative_constraints (window, 
-                                                 info->usable_screen_region,
-                                                 info,
-                                                 check_only);
+  return do_screen_and_monitor_relative_constraints (window, 
+                                                     info->usable_screen_region,
+                                                     info,
+                                                     check_only);
 }
 
 static gboolean
@@ -1281,10 +1421,10 @@ constrain_titlebar_visible (MetaWindow         *window,
                                               horiz_amount_onscreen,
                                               vert_amount_onscreen);
   retval =
-    do_screen_and_xinerama_relative_constraints (window, 
-                                                 info->usable_screen_region,
-                                                 info,
-                                                 check_only);
+    do_screen_and_monitor_relative_constraints (window, 
+                                                info->usable_screen_region,
+                                                info,
+                                                check_only);
   meta_rectangle_expand_region_conditionally (info->usable_screen_region,
                                               -horiz_amount_offscreen,
                                               -horiz_amount_offscreen,
@@ -1356,10 +1496,10 @@ constrain_partially_onscreen (MetaWindow         *window,
                                               horiz_amount_onscreen,
                                               vert_amount_onscreen);
   retval =
-    do_screen_and_xinerama_relative_constraints (window, 
-                                                 info->usable_screen_region,
-                                                 info,
-                                                 check_only);
+    do_screen_and_monitor_relative_constraints (window, 
+                                                info->usable_screen_region,
+                                                info,
+                                                check_only);
   meta_rectangle_expand_region_conditionally (info->usable_screen_region,
                                               -horiz_amount_offscreen,
                                               -horiz_amount_offscreen,

src/core/constraints.h

@@ -25,9 +25,9 @@
 #ifndef META_CONSTRAINTS_H
 #define META_CONSTRAINTS_H
 
-#include "util.h"
+#include <meta/util.h>
 #include "window-private.h"
-#include "frame-private.h"
+#include "frame.h"
 
 typedef enum
 {