static Window
get_output_window (MetaScreen *screen)
{
MetaDisplay *display = meta_screen_get_display (screen);
Display *xdisplay = meta_display_get_xdisplay (display);
Window output, xroot;
XWindowAttributes attr;
long event_mask;
xroot = meta_screen_get_xroot (screen);
event_mask = FocusChangeMask |
ExposureMask |
EnterWindowMask | LeaveWindowMask |
PointerMotionMask |
PropertyChangeMask |
ButtonPressMask | ButtonReleaseMask |
KeyPressMask | KeyReleaseMask;
output = XCompositeGetOverlayWindow (xdisplay, xroot);
if (XGetWindowAttributes (xdisplay, output, &attr))
{
event_mask |= attr.your_event_mask;
}
XSelectInput (xdisplay, output, event_mask);
return output;
}
static gboolean
test_case_check_xserver_stacking (TestCase *test,
GError **error)
{
MetaDisplay *display = meta_get_display ();
GString *local_string = g_string_new (NULL);
GString *x11_string = g_string_new (NULL);
int i;
guint64 *windows;
int n_windows;
meta_stack_tracker_get_stack (display->screen->stack_tracker, &windows, &n_windows);
for (i = 0; i < n_windows; i++)
{
if (META_STACK_ID_IS_X11 (windows[i]))
{
if (local_string->len > 0)
g_string_append_c (local_string, ' ');
g_string_append_printf (local_string, "%#lx", (Window)windows[i]);
}
}
Window root;
Window parent;
Window *children;
unsigned int n_children;
XQueryTree (display->xdisplay,
meta_screen_get_xroot (display->screen),
&root, &parent, &children, &n_children);
for (i = 0; i < (int)n_children; i++)
{
if (x11_string->len > 0)
g_string_append_c (x11_string, ' ');
g_string_append_printf (x11_string, "%#lx", (Window)children[i]);
}
if (strcmp (x11_string->str, local_string->str) != 0)
g_set_error (error, TEST_RUNNER_ERROR, TEST_RUNNER_ERROR_ASSERTION_FAILED,
"xserver stacking: x11='%s', local='%s'",
x11_string->str, local_string->str);
XFree (children);
g_string_free (local_string, TRUE);
g_string_free (x11_string, TRUE);
return *error == NULL;
}
void
meta_compositor_unmanage_screen (MetaCompositor *compositor,
MetaScreen *screen)
{
MetaDisplay *display = meta_screen_get_display (screen);
Display *xdisplay = meta_display_get_xdisplay (display);
Window xroot = meta_screen_get_xroot (screen);
/* This is the most important part of cleanup - we have to do this
* before giving up the window manager selection or the next
* window manager won't be able to redirect subwindows */
XCompositeUnredirectSubwindows (xdisplay, xroot, CompositeRedirectManual);
}
static void
redirect_windows (MetaScreen *screen)
{
MetaDisplay *display = meta_screen_get_display (screen);
Display *xdisplay = meta_display_get_xdisplay (display);
Window xroot = meta_screen_get_xroot (screen);
int screen_number = meta_screen_get_screen_number (screen);
guint n_retries;
guint max_retries;
if (meta_get_replace_current_wm ())
max_retries = 5;
else
max_retries = 1;
n_retries = 0;
/* Some compositors (like old versions of Mutter) might not properly unredirect
* subwindows before destroying the WM selection window; so we wait a while
* for such a compositor to exit before giving up.
*/
while (TRUE)
{
meta_error_trap_push (display);
XCompositeRedirectSubwindows (xdisplay, xroot, CompositeRedirectManual);
XSync (xdisplay, FALSE);
if (!meta_error_trap_pop_with_return (display))
break;
if (n_retries == max_retries)
{
/* This probably means that a non-WM compositor like xcompmgr is running;
* we have no way to get it to exit */
meta_fatal (_("Another compositing manager is already running on screen %i on display \"%s\"."),
screen_number, display->name);
}
n_retries++;
g_usleep (G_USEC_PER_SEC);
}
}
static void
process_property_notify (MetaCompositor *compositor,
XPropertyEvent *event,
MetaWindow *window)
{
MetaWindowActor *window_actor;
if (event->atom == compositor->atom_x_root_pixmap)
{
GSList *l;
for (l = meta_display_get_screens (compositor->display); l; l = l->next)
{
MetaScreen *screen = l->data;
if (event->window == meta_screen_get_xroot (screen))
{
meta_background_actor_update (screen);
return;
}
}
}
if (window == NULL)
return;
window_actor = META_WINDOW_ACTOR (meta_window_get_compositor_private (window));
if (window_actor == NULL)
return;
/* Check for the opacity changing */
if (event->atom == compositor->atom_net_wm_window_opacity)
{
meta_window_actor_update_opacity (window_actor);
DEBUG_TRACE ("process_property_notify: net_wm_window_opacity\n");
return;
}
DEBUG_TRACE ("process_property_notify: unknown\n");
}
/**
* meta_background_actor_update:
* @screen: a #MetaScreen
*
* 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 (MetaScreen *screen)
{
MetaScreenBackground *background;
MetaDisplay *display;
MetaCompositor *compositor;
Atom type;
int format;
gulong nitems;
gulong bytes_after;
guchar *data;
Pixmap root_pixmap_id;
background = meta_screen_background_get (screen);
display = meta_screen_get_display (screen);
compositor = meta_display_get_compositor (display);
root_pixmap_id = None;
if (!XGetWindowProperty (meta_display_get_xdisplay (display),
meta_screen_get_xroot (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;
CoglContext *ctx = clutter_backend_get_cogl_context (clutter_get_default_backend ());
GError *error = NULL;
meta_error_trap_push (display);
texture = cogl_texture_pixmap_x11_new (ctx, root_pixmap_id, FALSE, &error);
meta_error_trap_pop (display);
if (texture != COGL_INVALID_HANDLE)
{
set_texture (background, texture);
cogl_handle_unref (texture);
background->have_pixmap = True;
return;
}
else
{
g_warning ("Failed to create background texture from pixmap: %s",
error->message);
g_error_free (error);
}
}
background->have_pixmap = False;
set_texture_to_stage_color (background);
}
void
meta_compositor_manage_screen (MetaCompositor *compositor,
MetaScreen *screen)
{
MetaCompScreen *info;
MetaDisplay *display = meta_screen_get_display (screen);
Display *xdisplay = meta_display_get_xdisplay (display);
int screen_number = meta_screen_get_screen_number (screen);
Window xroot = meta_screen_get_xroot (screen);
Window xwin;
gint width, height;
XWindowAttributes attr;
long event_mask;
guint n_retries;
guint max_retries;
/* Check if the screen is already managed */
if (meta_screen_get_compositor_data (screen))
return;
if (meta_get_replace_current_wm ())
max_retries = 5;
else
max_retries = 1;
n_retries = 0;
/* Some compositors (like old versions of Muffin) might not properly unredirect
* subwindows before destroying the WM selection window; so we wait a while
* for such a compositor to exit before giving up.
*/
while (TRUE)
{
meta_error_trap_push_with_return (display);
XCompositeRedirectSubwindows (xdisplay, xroot, CompositeRedirectManual);
XSync (xdisplay, FALSE);
if (!meta_error_trap_pop_with_return (display))
break;
if (n_retries == max_retries)
{
/* This probably means that a non-WM compositor like xcompmgr is running;
* we have no way to get it to exit */
meta_fatal (_("Another compositing manager is already running on screen %i on display \"%s\"."),
screen_number, display->name);
}
n_retries++;
g_usleep (G_USEC_PER_SEC);
}
info = g_new0 (MetaCompScreen, 1);
/*
* We use an empty input region for Clutter as a default because that allows
* the user to interact with all the windows displayed on the screen.
* We have to initialize info->pending_input_region to an empty region explicitly,
* because None value is used to mean that the whole screen is an input region.
*/
info->pending_input_region = XFixesCreateRegion (xdisplay, NULL, 0);
info->screen = screen;
meta_screen_set_compositor_data (screen, info);
info->output = None;
info->windows = NULL;
meta_screen_set_cm_selection (screen);
info->stage = clutter_stage_new ();
meta_screen_get_size (screen, &width, &height);
clutter_actor_realize (info->stage);
xwin = clutter_x11_get_stage_window (CLUTTER_STAGE (info->stage));
XResizeWindow (xdisplay, xwin, width, height);
event_mask = FocusChangeMask |
ExposureMask |
EnterWindowMask | LeaveWindowMask |
PointerMotionMask |
PropertyChangeMask |
ButtonPressMask | ButtonReleaseMask |
KeyPressMask | KeyReleaseMask |
StructureNotifyMask;
if (XGetWindowAttributes (xdisplay, xwin, &attr))
{
event_mask |= attr.your_event_mask;
}
XSelectInput (xdisplay, xwin, event_mask);
info->window_group = meta_window_group_new (screen);
info->background_actor = meta_background_actor_new_for_screen (screen);
info->bottom_window_group = clutter_group_new();
info->overlay_group = clutter_group_new ();
info->top_window_group = meta_window_group_new (screen);
info->hidden_group = clutter_group_new ();
clutter_container_add (CLUTTER_CONTAINER (info->window_group),
info->background_actor,
NULL);
clutter_container_add (CLUTTER_CONTAINER (info->stage),
info->window_group,
info->overlay_group,
info->hidden_group,
NULL);
clutter_actor_hide (info->hidden_group);
info->plugin_mgr =
meta_plugin_manager_get (screen);
meta_plugin_manager_initialize (info->plugin_mgr);
/*
* Delay the creation of the overlay window as long as we can, to avoid
* blanking out the screen. This means that during the plugin loading, the
* overlay window is not accessible; if the plugin needs to access it
* directly, it should hook into the "show" signal on stage, and do
* its stuff there.
*/
info->output = get_output_window (screen);
XReparentWindow (xdisplay, xwin, info->output, 0, 0);
/* Make sure there isn't any left-over output shape on the
* overlay window by setting the whole screen to be an
* output region.
*
* Note: there doesn't seem to be any real chance of that
* because the X server will destroy the overlay window
* when the last client using it exits.
*/
XFixesSetWindowShapeRegion (xdisplay, info->output, ShapeBounding, 0, 0, None);
do_set_stage_input_region (screen, info->pending_input_region);
if (info->pending_input_region != None)
{
XFixesDestroyRegion (xdisplay, info->pending_input_region);
info->pending_input_region = None;
}
clutter_actor_show (info->overlay_group);
clutter_actor_show (info->stage);
}