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mutter-performance-source/src/compositor/compositor.c
Jonas Ådahl 110ed7ff8a laters: Use 'before-update' signal from stage 
Instead of the 'pre-paint' signal on MetaCompositor, rely directly on
the 'before-update' signal on the stage. A reason for this is that the
callback should not only invoked in connection to painting, but updating
in general. Currently the 'pre-paint' signal is emitted no matter
whether there were any painting or not, but that's both misleading and
will go away.

https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1285
2020-07-02 19:36:51 +02:00

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/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
/**
* SECTION:compositor
* @Title: MetaCompositor
* @Short_Description: Compositor API
*
* At a high-level, a window is not-visible or visible. When a
* window is added (with meta_compositor_add_window()) it is not visible.
* meta_compositor_show_window() indicates a transition from not-visible to
* visible. Some of the reasons for this:
*
* - Window newly created
* - Window is unminimized
* - Window is moved to the current desktop
* - Window was made sticky
*
* meta_compositor_hide_window() indicates that the window has transitioned from
* visible to not-visible. Some reasons include:
*
* - Window was destroyed
* - Window is minimized
* - Window is moved to a different desktop
* - Window no longer sticky.
*
* Note that combinations are possible - a window might have first
* been minimized and then moved to a different desktop. The 'effect' parameter
* to meta_compositor_show_window() and meta_compositor_hide_window() is a hint
* as to the appropriate effect to show the user and should not
* be considered to be indicative of a state change.
*
* When the active workspace is changed, meta_compositor_switch_workspace() is
* called first, then meta_compositor_show_window() and
* meta_compositor_hide_window() are called individually for each window
* affected, with an effect of META_COMP_EFFECT_NONE.
* If hiding windows will affect the switch workspace animation, the
* compositor needs to delay hiding the windows until the switch
* workspace animation completes.
*
* # Containers #
*
* There's two containers in the stage that are used to place window actors, here
* are listed in the order in which they are painted:
*
* - window group, accessible with meta_get_window_group_for_display()
* - top window group, accessible with meta_get_top_window_group_for_display()
*
* Mutter will place actors representing windows in the window group, except for
* override-redirect windows (ie. popups and menus) which will be placed in the
* top window group.
*/
#include "config.h"
#include "compositor/compositor-private.h"
#include <X11/extensions/Xcomposite.h>
#include "backends/meta-dnd-private.h"
#include "backends/x11/meta-backend-x11.h"
#include "backends/x11/meta-event-x11.h"
#include "backends/x11/meta-stage-x11.h"
#include "clutter/clutter-mutter.h"
#include "cogl/cogl.h"
#include "compositor/meta-later-private.h"
#include "compositor/meta-window-actor-x11.h"
#include "compositor/meta-window-actor-private.h"
#include "compositor/meta-window-group-private.h"
#include "core/display-private.h"
#include "core/frame.h"
#include "core/util-private.h"
#include "core/window-private.h"
#include "meta/compositor-mutter.h"
#include "meta/main.h"
#include "meta/meta-backend.h"
#include "meta/meta-background-actor.h"
#include "meta/meta-background-group.h"
#include "meta/meta-shadow-factory.h"
#include "meta/meta-x11-errors.h"
#include "meta/prefs.h"
#include "meta/window.h"
#include "x11/meta-x11-display-private.h"
#ifdef HAVE_WAYLAND
#include "compositor/meta-window-actor-wayland.h"
#include "wayland/meta-wayland-private.h"
#endif
enum
{
PROP_0,
PROP_DISPLAY,
PROP_BACKEND,
N_PROPS
};
static GParamSpec *obj_props[N_PROPS] = { NULL, };
enum
{
PRE_PAINT,
N_SIGNALS
};
static guint signals[N_SIGNALS];
typedef struct _MetaCompositorPrivate
{
GObject parent;
MetaDisplay *display;
MetaBackend *backend;
guint pre_paint_func_id;
guint post_paint_func_id;
gulong stage_presented_id;
gulong stage_after_paint_id;
int64_t server_time_query_time;
int64_t server_time_offset;
gboolean server_time_is_monotonic_time;
ClutterActor *stage;
ClutterActor *window_group;
ClutterActor *top_window_group;
ClutterActor *feedback_group;
GList *windows;
CoglContext *context;
MetaWindowActor *top_window_actor;
gulong top_window_actor_destroy_id;
int disable_unredirect_count;
int switch_workspace_in_progress;
MetaPluginManager *plugin_mgr;
MetaLaters *laters;
} MetaCompositorPrivate;
G_DEFINE_ABSTRACT_TYPE_WITH_PRIVATE (MetaCompositor, meta_compositor,
G_TYPE_OBJECT)
static void
on_presented (ClutterStage *stage,
CoglFrameEvent event,
ClutterFrameInfo *frame_info,
MetaCompositor *compositor);
static void
on_top_window_actor_destroyed (MetaWindowActor *window_actor,
MetaCompositor *compositor);
static gboolean
is_modal (MetaDisplay *display)
{
return display->event_route == META_EVENT_ROUTE_COMPOSITOR_GRAB;
}
static void sync_actor_stacking (MetaCompositor *compositor);
static void
meta_finish_workspace_switch (MetaCompositor *compositor)
{
MetaCompositorPrivate *priv =
meta_compositor_get_instance_private (compositor);
GList *l;
/* Finish hiding and showing actors for the new workspace */
for (l = priv->windows; l; l = l->next)
meta_window_actor_sync_visibility (l->data);
/* Fix up stacking order. */
sync_actor_stacking (compositor);
}
void
meta_switch_workspace_completed (MetaCompositor *compositor)
{
MetaCompositorPrivate *priv =
meta_compositor_get_instance_private (compositor);
/* FIXME -- must redo stacking order */
priv->switch_workspace_in_progress--;
if (priv->switch_workspace_in_progress < 0)
{
g_warning ("Error in workspace_switch accounting!");
priv->switch_workspace_in_progress = 0;
}
if (!priv->switch_workspace_in_progress)
meta_finish_workspace_switch (compositor);
}
void
meta_compositor_destroy (MetaCompositor *compositor)
{
g_object_run_dispose (G_OBJECT (compositor));
g_object_unref (compositor);
}
/* compat helper */
static MetaCompositor *
get_compositor_for_display (MetaDisplay *display)
{
return display->compositor;
}
/**
* meta_get_stage_for_display:
* @display: a #MetaDisplay
*
* Returns: (transfer none): The #ClutterStage for the display
*/
ClutterActor *
meta_get_stage_for_display (MetaDisplay *display)
{
MetaCompositor *compositor;
MetaCompositorPrivate *priv;
g_return_val_if_fail (display, NULL);
compositor = get_compositor_for_display (display);
g_return_val_if_fail (compositor, NULL);
priv = meta_compositor_get_instance_private (compositor);
return meta_backend_get_stage (priv->backend);
}
/**
* meta_get_window_group_for_display:
* @display: a #MetaDisplay
*
* Returns: (transfer none): The window group corresponding to @display
*/
ClutterActor *
meta_get_window_group_for_display (MetaDisplay *display)
{
MetaCompositor *compositor;
MetaCompositorPrivate *priv;
g_return_val_if_fail (display, NULL);
compositor = get_compositor_for_display (display);
g_return_val_if_fail (compositor, NULL);
priv = meta_compositor_get_instance_private (compositor);
return priv->window_group;
}
/**
* meta_get_top_window_group_for_display:
* @display: a #MetaDisplay
*
* Returns: (transfer none): The top window group corresponding to @display
*/
ClutterActor *
meta_get_top_window_group_for_display (MetaDisplay *display)
{
MetaCompositor *compositor;
MetaCompositorPrivate *priv;
g_return_val_if_fail (display, NULL);
compositor = get_compositor_for_display (display);
g_return_val_if_fail (compositor, NULL);
priv = meta_compositor_get_instance_private (compositor);
return priv->top_window_group;
}
/**
* meta_get_feedback_group_for_display:
* @display: a #MetaDisplay
*
* Returns: (transfer none): The feedback group corresponding to @display
*/
ClutterActor *
meta_get_feedback_group_for_display (MetaDisplay *display)
{
MetaCompositor *compositor;
MetaCompositorPrivate *priv;
g_return_val_if_fail (display, NULL);
compositor = get_compositor_for_display (display);
g_return_val_if_fail (compositor, NULL);
priv = meta_compositor_get_instance_private (compositor);
return priv->feedback_group;
}
/**
* meta_get_window_actors:
* @display: a #MetaDisplay
*
* Returns: (transfer none) (element-type Clutter.Actor): The set of #MetaWindowActor on @display
*/
GList *
meta_get_window_actors (MetaDisplay *display)
{
MetaCompositor *compositor;
MetaCompositorPrivate *priv;
g_return_val_if_fail (display, NULL);
compositor = get_compositor_for_display (display);
g_return_val_if_fail (compositor, NULL);
priv = meta_compositor_get_instance_private (compositor);
return priv->windows;
}
void
meta_focus_stage_window (MetaDisplay *display,
guint32 timestamp)
{
ClutterStage *stage;
Window window;
stage = CLUTTER_STAGE (meta_get_stage_for_display (display));
if (!stage)
return;
window = meta_x11_get_stage_window (stage);
if (window == None)
return;
meta_x11_display_set_input_focus_xwindow (display->x11_display,
window,
timestamp);
}
gboolean
meta_stage_is_focused (MetaDisplay *display)
{
ClutterStage *stage;
Window window;
if (meta_is_wayland_compositor ())
return TRUE;
stage = CLUTTER_STAGE (meta_get_stage_for_display (display));
if (!stage)
return FALSE;
window = meta_x11_get_stage_window (stage);
if (window == None)
return FALSE;
return (display->x11_display->focus_xwindow == window);
}
static gboolean
grab_devices (MetaModalOptions options,
guint32 timestamp)
{
MetaBackend *backend = META_BACKEND (meta_get_backend ());
gboolean pointer_grabbed = FALSE;
gboolean keyboard_grabbed = FALSE;
if ((options & META_MODAL_POINTER_ALREADY_GRABBED) == 0)
{
if (!meta_backend_grab_device (backend, META_VIRTUAL_CORE_POINTER_ID, timestamp))
goto fail;
pointer_grabbed = TRUE;
}
if ((options & META_MODAL_KEYBOARD_ALREADY_GRABBED) == 0)
{
if (!meta_backend_grab_device (backend, META_VIRTUAL_CORE_KEYBOARD_ID, timestamp))
goto fail;
keyboard_grabbed = TRUE;
}
return TRUE;
fail:
if (pointer_grabbed)
meta_backend_ungrab_device (backend, META_VIRTUAL_CORE_POINTER_ID, timestamp);
if (keyboard_grabbed)
meta_backend_ungrab_device (backend, META_VIRTUAL_CORE_KEYBOARD_ID, timestamp);
return FALSE;
}
gboolean
meta_begin_modal_for_plugin (MetaCompositor *compositor,
MetaPlugin *plugin,
MetaModalOptions options,
guint32 timestamp)
{
/* To some extent this duplicates code in meta_display_begin_grab_op(), but there
* are significant differences in how we handle grabs that make it difficult to
* merge the two.
*/
MetaCompositorPrivate *priv =
meta_compositor_get_instance_private (compositor);
MetaDisplay *display = priv->display;
#ifdef HAVE_WAYLAND
if (display->grab_op == META_GRAB_OP_WAYLAND_POPUP)
{
MetaWaylandSeat *seat = meta_wayland_compositor_get_default ()->seat;
meta_wayland_pointer_end_popup_grab (seat->pointer);
}
#endif
if (is_modal (display) || display->grab_op != META_GRAB_OP_NONE)
return FALSE;
if (display->x11_display)
{
/* XXX: why is this needed? */
XIUngrabDevice (display->x11_display->xdisplay,
META_VIRTUAL_CORE_POINTER_ID,
timestamp);
XSync (display->x11_display->xdisplay, False);
}
if (!grab_devices (options, timestamp))
return FALSE;
display->grab_op = META_GRAB_OP_COMPOSITOR;
display->event_route = META_EVENT_ROUTE_COMPOSITOR_GRAB;
display->grab_window = NULL;
display->grab_have_pointer = TRUE;
display->grab_have_keyboard = TRUE;
g_signal_emit_by_name (display, "grab-op-begin",
meta_plugin_get_display (plugin),
display->grab_window, display->grab_op);
if (meta_is_wayland_compositor ())
{
meta_display_sync_wayland_input_focus (display);
meta_display_cancel_touch (display);
#ifdef HAVE_WAYLAND
meta_dnd_wayland_handle_begin_modal (compositor);
#endif
}
return TRUE;
}
void
meta_end_modal_for_plugin (MetaCompositor *compositor,
MetaPlugin *plugin,
guint32 timestamp)
{
MetaCompositorPrivate *priv =
meta_compositor_get_instance_private (compositor);
MetaDisplay *display = priv->display;
MetaBackend *backend = meta_get_backend ();
MetaWindow *grab_window = display->grab_window;
MetaGrabOp grab_op = display->grab_op;
g_return_if_fail (is_modal (display));
display->grab_op = META_GRAB_OP_NONE;
display->event_route = META_EVENT_ROUTE_NORMAL;
display->grab_window = NULL;
display->grab_have_pointer = FALSE;
display->grab_have_keyboard = FALSE;
meta_backend_ungrab_device (backend, META_VIRTUAL_CORE_POINTER_ID, timestamp);
meta_backend_ungrab_device (backend, META_VIRTUAL_CORE_KEYBOARD_ID, timestamp);
#ifdef HAVE_WAYLAND
if (meta_is_wayland_compositor ())
{
meta_dnd_wayland_handle_end_modal (compositor);
meta_display_sync_wayland_input_focus (display);
}
#endif
g_signal_emit_by_name (display, "grab-op-end",
meta_plugin_get_display (plugin),
grab_window, grab_op);
}
static void
after_stage_paint (ClutterStage *stage,
gpointer data)
{
MetaCompositor *compositor = data;
MetaCompositorPrivate *priv =
meta_compositor_get_instance_private (compositor);
GList *l;
for (l = priv->windows; l; l = l->next)
meta_window_actor_post_paint (l->data);
}
static void
redirect_windows (MetaX11Display *x11_display)
{
Display *xdisplay = meta_x11_display_get_xdisplay (x11_display);
Window xroot = meta_x11_display_get_xroot (x11_display);
int screen_number = meta_x11_display_get_screen_number (x11_display);
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_x11_error_trap_push (x11_display);
XCompositeRedirectSubwindows (xdisplay, xroot, CompositeRedirectManual);
XSync (xdisplay, FALSE);
if (!meta_x11_error_trap_pop_with_return (x11_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, x11_display->name);
}
n_retries++;
g_usleep (G_USEC_PER_SEC);
}
}
void
meta_compositor_redirect_x11_windows (MetaCompositor *compositor)
{
MetaCompositorPrivate *priv =
meta_compositor_get_instance_private (compositor);
MetaDisplay *display = priv->display;
if (display->x11_display)
redirect_windows (display->x11_display);
}
gboolean
meta_compositor_do_manage (MetaCompositor *compositor,
GError **error)
{
MetaCompositorPrivate *priv =
meta_compositor_get_instance_private (compositor);
MetaDisplay *display = priv->display;
MetaBackend *backend = priv->backend;
ClutterActor *stage = meta_backend_get_stage (backend);
priv->stage_presented_id =
g_signal_connect (stage, "presented",
G_CALLBACK (on_presented),
compositor);
/* We use connect_after() here to accomodate code in GNOME Shell that,
* when benchmarking drawing performance, connects to ::after-paint
* and calls glFinish(). The timing information from that will be
* more accurate if we hold off until that completes before we signal
* apps to begin drawing the next frame. If there are no other
* connections to ::after-paint, connect() vs. connect_after() doesn't
* matter.
*/
priv->stage_after_paint_id =
g_signal_connect_after (stage, "after-paint",
G_CALLBACK (after_stage_paint), compositor);
clutter_stage_set_sync_delay (CLUTTER_STAGE (stage), META_SYNC_DELAY);
priv->window_group = meta_window_group_new (display);
priv->top_window_group = meta_window_group_new (display);
priv->feedback_group = meta_window_group_new (display);
clutter_actor_add_child (stage, priv->window_group);
clutter_actor_add_child (stage, priv->top_window_group);
clutter_actor_add_child (stage, priv->feedback_group);
if (!META_COMPOSITOR_GET_CLASS (compositor)->manage (compositor, error))
return FALSE;
priv->plugin_mgr = meta_plugin_manager_new (compositor);
return TRUE;
}
void
meta_compositor_manage (MetaCompositor *compositor)
{
GError *error = NULL;
if (!meta_compositor_do_manage (compositor, &error))
g_error ("Compositor failed to manage display: %s", error->message);
}
void
meta_compositor_unmanage (MetaCompositor *compositor)
{
META_COMPOSITOR_GET_CLASS (compositor)->unmanage (compositor);
}
void
meta_compositor_add_window (MetaCompositor *compositor,
MetaWindow *window)
{
MetaCompositorPrivate *priv =
meta_compositor_get_instance_private (compositor);
MetaWindowActor *window_actor;
ClutterActor *window_group;
GType window_actor_type = G_TYPE_INVALID;
switch (window->client_type)
{
case META_WINDOW_CLIENT_TYPE_X11:
window_actor_type = META_TYPE_WINDOW_ACTOR_X11;
break;
#ifdef HAVE_WAYLAND
case META_WINDOW_CLIENT_TYPE_WAYLAND:
window_actor_type = META_TYPE_WINDOW_ACTOR_WAYLAND;
break;
#endif
default:
g_return_if_reached ();
}
window_actor = g_object_new (window_actor_type,
"meta-window", window,
"show-on-set-parent", FALSE,
NULL);
if (window->layer == META_LAYER_OVERRIDE_REDIRECT)
window_group = priv->top_window_group;
else
window_group = priv->window_group;
clutter_actor_add_child (window_group, CLUTTER_ACTOR (window_actor));
/* Initial position in the stack is arbitrary; stacking will be synced
* before we first paint.
*/
priv->windows = g_list_append (priv->windows, window_actor);
sync_actor_stacking (compositor);
}
static void
meta_compositor_real_remove_window (MetaCompositor *compositor,
MetaWindow *window)
{
MetaWindowActor *window_actor = meta_window_actor_from_window (window);
meta_window_actor_queue_destroy (window_actor);
}
void
meta_compositor_remove_window (MetaCompositor *compositor,
MetaWindow *window)
{
META_COMPOSITOR_GET_CLASS (compositor)->remove_window (compositor, window);
}
void
meta_compositor_remove_window_actor (MetaCompositor *compositor,
MetaWindowActor *window_actor)
{
MetaCompositorPrivate *priv =
meta_compositor_get_instance_private (compositor);
priv->windows = g_list_remove (priv->windows, window_actor);
}
void
meta_compositor_sync_updates_frozen (MetaCompositor *compositor,
MetaWindow *window)
{
MetaWindowActor *window_actor = meta_window_actor_from_window (window);
meta_window_actor_sync_updates_frozen (window_actor);
}
void
meta_compositor_queue_frame_drawn (MetaCompositor *compositor,
MetaWindow *window,
gboolean no_delay_frame)
{
MetaWindowActor *window_actor = meta_window_actor_from_window (window);
meta_window_actor_queue_frame_drawn (window_actor, no_delay_frame);
}
void
meta_compositor_window_shape_changed (MetaCompositor *compositor,
MetaWindow *window)
{
MetaWindowActor *window_actor;
window_actor = meta_window_actor_from_window (window);
if (!window_actor)
return;
meta_window_actor_x11_update_shape (META_WINDOW_ACTOR_X11 (window_actor));
}
void
meta_compositor_window_opacity_changed (MetaCompositor *compositor,
MetaWindow *window)
{
MetaWindowActor *window_actor;
window_actor = meta_window_actor_from_window (window);
if (!window_actor)
return;
meta_window_actor_update_opacity (window_actor);
}
gboolean
meta_compositor_filter_keybinding (MetaCompositor *compositor,
MetaKeyBinding *binding)
{
MetaCompositorPrivate *priv =
meta_compositor_get_instance_private (compositor);
return meta_plugin_manager_filter_keybinding (priv->plugin_mgr, binding);
}
void
meta_compositor_show_window (MetaCompositor *compositor,
MetaWindow *window,
MetaCompEffect effect)
{
MetaWindowActor *window_actor = meta_window_actor_from_window (window);
meta_window_actor_show (window_actor, effect);
}
void
meta_compositor_hide_window (MetaCompositor *compositor,
MetaWindow *window,
MetaCompEffect effect)
{
MetaCompositorPrivate *priv =
meta_compositor_get_instance_private (compositor);
MetaWindowActor *window_actor = meta_window_actor_from_window (window);
meta_window_actor_hide (window_actor, effect);
meta_stack_tracker_queue_sync_stack (priv->display->stack_tracker);
}
void
meta_compositor_size_change_window (MetaCompositor *compositor,
MetaWindow *window,
MetaSizeChange which_change,
MetaRectangle *old_frame_rect,
MetaRectangle *old_buffer_rect)
{
MetaWindowActor *window_actor = meta_window_actor_from_window (window);
meta_window_actor_size_change (window_actor, which_change, old_frame_rect, old_buffer_rect);
}
void
meta_compositor_switch_workspace (MetaCompositor *compositor,
MetaWorkspace *from,
MetaWorkspace *to,
MetaMotionDirection direction)
{
MetaCompositorPrivate *priv =
meta_compositor_get_instance_private (compositor);
gint to_indx, from_indx;
to_indx = meta_workspace_index (to);
from_indx = meta_workspace_index (from);
priv->switch_workspace_in_progress++;
if (!meta_plugin_manager_switch_workspace (priv->plugin_mgr,
from_indx,
to_indx,
direction))
{
priv->switch_workspace_in_progress--;
/* We have to explicitely call this to fix up stacking order of the
* actors; this is because the abs stacking position of actors does not
* necessarily change during the window hiding/unhiding, only their
* relative position toward the destkop window.
*/
meta_finish_workspace_switch (compositor);
}
}
static void
sync_actor_stacking (MetaCompositor *compositor)
{
MetaCompositorPrivate *priv =
meta_compositor_get_instance_private (compositor);
GList *children;
GList *expected_window_node;
GList *tmp;
GList *old;
GList *backgrounds;
gboolean has_windows;
gboolean reordered;
/* NB: The first entries in the lists are stacked the lowest */
/* Restacking will trigger full screen redraws, so it's worth a
* little effort to make sure we actually need to restack before
* we go ahead and do it */
children = clutter_actor_get_children (priv->window_group);
has_windows = FALSE;
reordered = FALSE;
/* We allow for actors in the window group other than the actors we
* know about, but it's up to a plugin to try and keep them stacked correctly
* (we really need extra API to make that reliable.)
*/
/* First we collect a list of all backgrounds, and check if they're at the
* bottom. Then we check if the window actors are in the correct sequence */
backgrounds = NULL;
expected_window_node = priv->windows;
for (old = children; old != NULL; old = old->next)
{
ClutterActor *actor = old->data;
if (META_IS_BACKGROUND_GROUP (actor) ||
META_IS_BACKGROUND_ACTOR (actor))
{
backgrounds = g_list_prepend (backgrounds, actor);
if (has_windows)
reordered = TRUE;
}
else if (META_IS_WINDOW_ACTOR (actor) && !reordered)
{
has_windows = TRUE;
if (expected_window_node != NULL && actor == expected_window_node->data)
expected_window_node = expected_window_node->next;
else
reordered = TRUE;
}
}
g_list_free (children);
if (!reordered)
{
g_list_free (backgrounds);
return;
}
/* reorder the actors by lowering them in turn to the bottom of the stack.
* windows first, then background.
*
* We reorder the actors even if they're not parented to the window group,
* to allow stacking to work with intermediate actors (eg during effects)
*/
for (tmp = g_list_last (priv->windows); tmp != NULL; tmp = tmp->prev)
{
ClutterActor *actor = tmp->data, *parent;
parent = clutter_actor_get_parent (actor);
clutter_actor_set_child_below_sibling (parent, actor, NULL);
}
/* we prepended the backgrounds above so the last actor in the list
* should get lowered to the bottom last.
*/
for (tmp = backgrounds; tmp != NULL; tmp = tmp->next)
{
ClutterActor *actor = tmp->data, *parent;
parent = clutter_actor_get_parent (actor);
clutter_actor_set_child_below_sibling (parent, actor, NULL);
}
g_list_free (backgrounds);
}
/*
* Find the top most window that is visible on the screen. The intention of
* this is to avoid offscreen windows that isn't actually part of the visible
* desktop (such as the UI frames override redirect window).
*/
static MetaWindowActor *
get_top_visible_window_actor (MetaCompositor *compositor)
{
MetaCompositorPrivate *priv =
meta_compositor_get_instance_private (compositor);
GList *l;
for (l = g_list_last (priv->windows); l; l = l->prev)
{
MetaWindowActor *window_actor = l->data;
MetaWindow *window = meta_window_actor_get_meta_window (window_actor);
MetaRectangle buffer_rect;
MetaRectangle display_rect = { 0 };
if (!window->visible_to_compositor)
continue;
meta_window_get_buffer_rect (window, &buffer_rect);
meta_display_get_size (priv->display,
&display_rect.width, &display_rect.height);
if (meta_rectangle_overlap (&display_rect, &buffer_rect))
return window_actor;
}
return NULL;
}
static void
on_top_window_actor_destroyed (MetaWindowActor *window_actor,
MetaCompositor *compositor)
{
MetaCompositorPrivate *priv =
meta_compositor_get_instance_private (compositor);
priv->top_window_actor = NULL;
priv->top_window_actor_destroy_id = 0;
priv->windows = g_list_remove (priv->windows, window_actor);
meta_stack_tracker_queue_sync_stack (priv->display->stack_tracker);
}
void
meta_compositor_sync_stack (MetaCompositor *compositor,
GList *stack)
{
MetaCompositorPrivate *priv =
meta_compositor_get_instance_private (compositor);
MetaWindowActor *top_window_actor;
GList *old_stack;
/* This is painful because hidden windows that we are in the process
* of animating out of existence. They'll be at the bottom of the
* stack of X windows, but we want to leave them in their old position
* until the animation effect finishes.
*/
/* Sources: first window is the highest */
stack = g_list_copy (stack); /* The new stack of MetaWindow */
old_stack = g_list_reverse (priv->windows); /* The old stack of MetaWindowActor */
priv->windows = NULL;
while (TRUE)
{
MetaWindowActor *old_actor = NULL, *stack_actor = NULL, *actor;
MetaWindow *old_window = NULL, *stack_window = NULL, *window;
/* Find the remaining top actor in our existing stack (ignoring
* windows that have been hidden and are no longer animating) */
while (old_stack)
{
old_actor = old_stack->data;
old_window = meta_window_actor_get_meta_window (old_actor);
if ((old_window->hidden || old_window->unmanaging) &&
!meta_window_actor_effect_in_progress (old_actor))
{
old_stack = g_list_delete_link (old_stack, old_stack);
old_actor = NULL;
}
else
break;
}
/* And the remaining top actor in the new stack */
while (stack)
{
stack_window = stack->data;
stack_actor = meta_window_actor_from_window (stack_window);
if (!stack_actor)
{
meta_verbose ("Failed to find corresponding MetaWindowActor "
"for window %s\n", meta_window_get_description (stack_window));
stack = g_list_delete_link (stack, stack);
}
else
break;
}
if (!old_actor && !stack_actor) /* Nothing more to stack */
break;
/* We usually prefer the window in the new stack, but if if we
* found a hidden window in the process of being animated out
* of existence in the old stack we use that instead. We've
* filtered out non-animating hidden windows above.
*/
if (old_actor &&
(!stack_actor || old_window->hidden || old_window->unmanaging))
{
actor = old_actor;
window = old_window;
}
else
{
actor = stack_actor;
window = stack_window;
}
/* OK, we know what actor we want next. Add it to our window
* list, and remove it from both source lists. (It will
* be at the front of at least one, hopefully it will be
* near the front of the other.)
*/
priv->windows = g_list_prepend (priv->windows, actor);
stack = g_list_remove (stack, window);
old_stack = g_list_remove (old_stack, actor);
}
sync_actor_stacking (compositor);
top_window_actor = get_top_visible_window_actor (compositor);
if (priv->top_window_actor == top_window_actor)
return;
g_clear_signal_handler (&priv->top_window_actor_destroy_id,
priv->top_window_actor);
priv->top_window_actor = top_window_actor;
if (priv->top_window_actor)
priv->top_window_actor_destroy_id =
g_signal_connect (priv->top_window_actor, "destroy",
G_CALLBACK (on_top_window_actor_destroyed),
compositor);
}
void
meta_compositor_sync_window_geometry (MetaCompositor *compositor,
MetaWindow *window,
gboolean did_placement)
{
MetaCompositorPrivate *priv =
meta_compositor_get_instance_private (compositor);
MetaWindowActor *window_actor = meta_window_actor_from_window (window);
MetaWindowActorChanges changes;
changes = meta_window_actor_sync_actor_geometry (window_actor, did_placement);
if (changes & META_WINDOW_ACTOR_CHANGE_SIZE)
meta_plugin_manager_event_size_changed (priv->plugin_mgr, window_actor);
}
static void
on_presented (ClutterStage *stage,
CoglFrameEvent event,
ClutterFrameInfo *frame_info,
MetaCompositor *compositor)
{
MetaCompositorPrivate *priv =
meta_compositor_get_instance_private (compositor);
GList *l;
if (event == COGL_FRAME_EVENT_COMPLETE)
{
gint64 presentation_time_cogl = frame_info->presentation_time;
gint64 presentation_time;
if (presentation_time_cogl != 0)
{
/* Cogl reports presentation in terms of its own clock, which is
* guaranteed to be in nanoseconds but with no specified base. The
* normal case with the open source GPU drivers on Linux 3.8 and
* newer is that the base of cogl_get_clock_time() is that of
* clock_gettime(CLOCK_MONOTONIC), so the same as g_get_monotonic_time),
* but there's no exposure of that through the API. clock_gettime()
* is fairly fast, so calling it twice and subtracting to get a
* nearly-zero number is acceptable, if a litle ugly.
*/
gint64 current_cogl_time = cogl_get_clock_time (priv->context);
gint64 current_monotonic_time = g_get_monotonic_time ();
presentation_time =
current_monotonic_time + (presentation_time_cogl - current_cogl_time) / 1000;
}
else
{
presentation_time = 0;
}
for (l = priv->windows; l; l = l->next)
meta_window_actor_frame_complete (l->data, frame_info, presentation_time);
}
}
static void
meta_compositor_real_pre_paint (MetaCompositor *compositor)
{
MetaCompositorPrivate *priv =
meta_compositor_get_instance_private (compositor);
GList *l;
for (l = priv->windows; l; l = l->next)
meta_window_actor_pre_paint (l->data);
}
static void
meta_compositor_pre_paint (MetaCompositor *compositor)
{
COGL_TRACE_BEGIN_SCOPED (MetaCompositorPrePaint,
"Compositor (pre-paint)");
g_signal_emit (compositor, signals[PRE_PAINT], 0);
}
static gboolean
meta_pre_paint_func (gpointer data)
{
MetaCompositor *compositor = data;
meta_compositor_pre_paint (compositor);
return TRUE;
}
static void
meta_compositor_real_post_paint (MetaCompositor *compositor)
{
MetaCompositorPrivate *priv =
meta_compositor_get_instance_private (compositor);
CoglGraphicsResetStatus status;
#ifdef HAVE_WAYLAND
if (meta_is_wayland_compositor ())
meta_wayland_compositor_paint_finished (meta_wayland_compositor_get_default ());
#endif
status = cogl_get_graphics_reset_status (priv->context);
switch (status)
{
case COGL_GRAPHICS_RESET_STATUS_NO_ERROR:
break;
case COGL_GRAPHICS_RESET_STATUS_PURGED_CONTEXT_RESET:
g_signal_emit_by_name (priv->display, "gl-video-memory-purged");
clutter_actor_queue_redraw (meta_backend_get_stage (priv->backend));
break;
default:
/* The ARB_robustness spec says that, on error, the application
should destroy the old context and create a new one. Since we
don't have the necessary plumbing to do this we'll simply
restart the process. Obviously we can't do this when we are
a wayland compositor but in that case we shouldn't get here
since we don't enable robustness in that case. */
g_assert (!meta_is_wayland_compositor ());
meta_restart (NULL);
break;
}
}
static void
meta_compositor_post_paint (MetaCompositor *compositor)
{
COGL_TRACE_BEGIN_SCOPED (MetaCompositorPostPaint,
"Compositor (post-paint)");
META_COMPOSITOR_GET_CLASS (compositor)->post_paint (compositor);
}
static gboolean
meta_post_paint_func (gpointer data)
{
MetaCompositor *compositor = data;
meta_compositor_post_paint (compositor);
return TRUE;
}
static void
meta_compositor_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
MetaCompositor *compositor = META_COMPOSITOR (object);
MetaCompositorPrivate *priv =
meta_compositor_get_instance_private (compositor);
switch (prop_id)
{
case PROP_DISPLAY:
priv->display = g_value_get_object (value);
break;
case PROP_BACKEND:
priv->backend = g_value_get_object (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
}
}
static void
meta_compositor_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
MetaCompositor *compositor = META_COMPOSITOR (object);
MetaCompositorPrivate *priv =
meta_compositor_get_instance_private (compositor);
switch (prop_id)
{
case PROP_DISPLAY:
g_value_set_object (value, priv->display);
break;
case PROP_BACKEND:
g_value_set_object (value, priv->backend);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
}
}
static void
meta_compositor_init (MetaCompositor *compositor)
{
}
static void
meta_compositor_constructed (GObject *object)
{
MetaCompositor *compositor = META_COMPOSITOR (object);
MetaCompositorPrivate *priv =
meta_compositor_get_instance_private (compositor);
ClutterBackend *clutter_backend =
meta_backend_get_clutter_backend (priv->backend);
priv->context = clutter_backend->cogl_context;
priv->pre_paint_func_id =
clutter_threads_add_repaint_func_full (CLUTTER_REPAINT_FLAGS_PRE_PAINT,
meta_pre_paint_func,
compositor,
NULL);
priv->post_paint_func_id =
clutter_threads_add_repaint_func_full (CLUTTER_REPAINT_FLAGS_POST_PAINT,
meta_post_paint_func,
compositor,
NULL);
priv->laters = meta_laters_new (compositor);
G_OBJECT_CLASS (meta_compositor_parent_class)->constructed (object);
}
static void
meta_compositor_dispose (GObject *object)
{
MetaCompositor *compositor = META_COMPOSITOR (object);
MetaCompositorPrivate *priv =
meta_compositor_get_instance_private (compositor);
ClutterActor *stage = meta_backend_get_stage (priv->backend);
g_clear_pointer (&priv->laters, meta_laters_free);
g_clear_signal_handler (&priv->stage_after_paint_id, stage);
g_clear_signal_handler (&priv->stage_presented_id, stage);
g_clear_handle_id (&priv->pre_paint_func_id,
clutter_threads_remove_repaint_func);
g_clear_handle_id (&priv->post_paint_func_id,
clutter_threads_remove_repaint_func);
g_clear_signal_handler (&priv->top_window_actor_destroy_id,
priv->top_window_actor);
g_clear_pointer (&priv->window_group, clutter_actor_destroy);
g_clear_pointer (&priv->top_window_group, clutter_actor_destroy);
g_clear_pointer (&priv->feedback_group, clutter_actor_destroy);
g_clear_pointer (&priv->windows, g_list_free);
G_OBJECT_CLASS (meta_compositor_parent_class)->dispose (object);
}
static void
meta_compositor_class_init (MetaCompositorClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
object_class->set_property = meta_compositor_set_property;
object_class->get_property = meta_compositor_get_property;
object_class->constructed = meta_compositor_constructed;
object_class->dispose = meta_compositor_dispose;
klass->remove_window = meta_compositor_real_remove_window;
klass->pre_paint = meta_compositor_real_pre_paint;
klass->post_paint = meta_compositor_real_post_paint;
obj_props[PROP_DISPLAY] =
g_param_spec_object ("display",
"display",
"MetaDisplay",
META_TYPE_DISPLAY,
G_PARAM_READWRITE |
G_PARAM_CONSTRUCT_ONLY |
G_PARAM_STATIC_STRINGS);
obj_props[PROP_BACKEND] =
g_param_spec_object ("backend",
"backend",
"MetaBackend",
META_TYPE_BACKEND,
G_PARAM_READWRITE |
G_PARAM_CONSTRUCT_ONLY |
G_PARAM_STATIC_STRINGS);
g_object_class_install_properties (object_class, N_PROPS, obj_props);
signals[PRE_PAINT] =
g_signal_new ("pre-paint",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (MetaCompositorClass, pre_paint),
NULL, NULL, NULL,
G_TYPE_NONE, 0);
}
/**
* meta_disable_unredirect_for_display:
* @display: a #MetaDisplay
*
* Disables unredirection, can be usefull in situations where having
* unredirected windows is undesireable like when recording a video.
*
*/
void
meta_disable_unredirect_for_display (MetaDisplay *display)
{
MetaCompositor *compositor;
MetaCompositorPrivate *priv;
if (display->closing)
return;
compositor = get_compositor_for_display (display);
priv = meta_compositor_get_instance_private (compositor);
priv->disable_unredirect_count++;
}
/**
* meta_enable_unredirect_for_display:
* @display: a #MetaDisplay
*
* Enables unredirection which reduces the overhead for apps like games.
*
*/
void
meta_enable_unredirect_for_display (MetaDisplay *display)
{
MetaCompositor *compositor;
MetaCompositorPrivate *priv;
if (display->closing)
return;
compositor = get_compositor_for_display (display);
priv = meta_compositor_get_instance_private (compositor);
if (priv->disable_unredirect_count == 0)
g_warning ("Called enable_unredirect_for_display while unredirection is enabled.");
if (priv->disable_unredirect_count > 0)
priv->disable_unredirect_count--;
}
gboolean
meta_compositor_is_unredirect_inhibited (MetaCompositor *compositor)
{
MetaCompositorPrivate *priv =
meta_compositor_get_instance_private (compositor);
return priv->disable_unredirect_count > 0;
}
#define FLASH_TIME_MS 50
static void
flash_out_completed (ClutterTimeline *timeline,
gboolean is_finished,
gpointer user_data)
{
ClutterActor *flash = CLUTTER_ACTOR (user_data);
clutter_actor_destroy (flash);
}
void
meta_compositor_flash_display (MetaCompositor *compositor,
MetaDisplay *display)
{
ClutterActor *stage;
ClutterActor *flash;
ClutterTransition *transition;
gfloat width, height;
stage = meta_get_stage_for_display (display);
clutter_actor_get_size (stage, &width, &height);
flash = clutter_actor_new ();
clutter_actor_set_background_color (flash, CLUTTER_COLOR_Black);
clutter_actor_set_size (flash, width, height);
clutter_actor_set_opacity (flash, 0);
clutter_actor_add_child (stage, flash);
clutter_actor_save_easing_state (flash);
clutter_actor_set_easing_mode (flash, CLUTTER_EASE_IN_QUAD);
clutter_actor_set_easing_duration (flash, FLASH_TIME_MS);
clutter_actor_set_opacity (flash, 192);
transition = clutter_actor_get_transition (flash, "opacity");
clutter_timeline_set_auto_reverse (CLUTTER_TIMELINE (transition), TRUE);
clutter_timeline_set_repeat_count (CLUTTER_TIMELINE (transition), 2);
g_signal_connect (transition, "stopped",
G_CALLBACK (flash_out_completed), flash);
clutter_actor_restore_easing_state (flash);
}
static void
window_flash_out_completed (ClutterTimeline *timeline,
gboolean is_finished,
gpointer user_data)
{
ClutterActor *flash = CLUTTER_ACTOR (user_data);
clutter_actor_destroy (flash);
}
void
meta_compositor_flash_window (MetaCompositor *compositor,
MetaWindow *window)
{
ClutterActor *window_actor =
CLUTTER_ACTOR (meta_window_actor_from_window (window));
ClutterActor *flash;
ClutterTransition *transition;
flash = clutter_actor_new ();
clutter_actor_set_background_color (flash, CLUTTER_COLOR_Black);
clutter_actor_set_size (flash, window->rect.width, window->rect.height);
clutter_actor_set_position (flash,
window->custom_frame_extents.left,
window->custom_frame_extents.top);
clutter_actor_set_opacity (flash, 0);
clutter_actor_add_child (window_actor, flash);
clutter_actor_save_easing_state (flash);
clutter_actor_set_easing_mode (flash, CLUTTER_EASE_IN_QUAD);
clutter_actor_set_easing_duration (flash, FLASH_TIME_MS);
clutter_actor_set_opacity (flash, 192);
transition = clutter_actor_get_transition (flash, "opacity");
clutter_timeline_set_auto_reverse (CLUTTER_TIMELINE (transition), TRUE);
clutter_timeline_set_repeat_count (CLUTTER_TIMELINE (transition), 2);
g_signal_connect (transition, "stopped",
G_CALLBACK (window_flash_out_completed), flash);
clutter_actor_restore_easing_state (flash);
}
/**
* meta_compositor_monotonic_time_to_server_time:
* @display: a #MetaDisplay
* @monotonic_time: time in the units of g_get_monotonic_time()
*
* _NET_WM_FRAME_DRAWN and _NET_WM_FRAME_TIMINGS messages represent time
* as a "high resolution server time" - this is the server time interpolated
* to microsecond resolution. The advantage of this time representation
* is that if X server is running on the same computer as a client, and
* the Xserver uses 'clock_gettime(CLOCK_MONOTONIC, ...)' for the server
* time, the client can detect this, and all such clients will share a
* a time representation with high accuracy. If there is not a common
* time source, then the time synchronization will be less accurate.
*/
gint64
meta_compositor_monotonic_time_to_server_time (MetaDisplay *display,
gint64 monotonic_time)
{
MetaCompositor *compositor = display->compositor;
MetaCompositorPrivate *priv =
meta_compositor_get_instance_private (compositor);
if (priv->server_time_query_time == 0 ||
(!priv->server_time_is_monotonic_time &&
monotonic_time > priv->server_time_query_time + 10*1000*1000)) /* 10 seconds */
{
guint32 server_time = meta_display_get_current_time_roundtrip (display);
gint64 server_time_usec = (gint64)server_time * 1000;
gint64 current_monotonic_time = g_get_monotonic_time ();
priv->server_time_query_time = current_monotonic_time;
/* If the server time is within a second of the monotonic time,
* we assume that they are identical. This seems like a big margin,
* but we want to be as robust as possible even if the system
* is under load and our processing of the server response is
* delayed.
*/
if (server_time_usec > current_monotonic_time - 1000*1000 &&
server_time_usec < current_monotonic_time + 1000*1000)
priv->server_time_is_monotonic_time = TRUE;
priv->server_time_offset = server_time_usec - current_monotonic_time;
}
if (priv->server_time_is_monotonic_time)
return monotonic_time;
else
return monotonic_time + priv->server_time_offset;
}
void
meta_compositor_show_tile_preview (MetaCompositor *compositor,
MetaWindow *window,
MetaRectangle *tile_rect,
int tile_monitor_number)
{
MetaCompositorPrivate *priv =
meta_compositor_get_instance_private (compositor);
meta_plugin_manager_show_tile_preview (priv->plugin_mgr,
window, tile_rect, tile_monitor_number);
}
void
meta_compositor_hide_tile_preview (MetaCompositor *compositor)
{
MetaCompositorPrivate *priv =
meta_compositor_get_instance_private (compositor);
meta_plugin_manager_hide_tile_preview (priv->plugin_mgr);
}
void
meta_compositor_show_window_menu (MetaCompositor *compositor,
MetaWindow *window,
MetaWindowMenuType menu,
int x,
int y)
{
MetaCompositorPrivate *priv =
meta_compositor_get_instance_private (compositor);
meta_plugin_manager_show_window_menu (priv->plugin_mgr, window, menu, x, y);
}
void
meta_compositor_show_window_menu_for_rect (MetaCompositor *compositor,
MetaWindow *window,
MetaWindowMenuType menu,
MetaRectangle *rect)
{
MetaCompositorPrivate *priv =
meta_compositor_get_instance_private (compositor);
meta_plugin_manager_show_window_menu_for_rect (priv->plugin_mgr, window, menu, rect);
}
MetaCloseDialog *
meta_compositor_create_close_dialog (MetaCompositor *compositor,
MetaWindow *window)
{
MetaCompositorPrivate *priv =
meta_compositor_get_instance_private (compositor);
return meta_plugin_manager_create_close_dialog (priv->plugin_mgr,
window);
}
MetaInhibitShortcutsDialog *
meta_compositor_create_inhibit_shortcuts_dialog (MetaCompositor *compositor,
MetaWindow *window)
{
MetaCompositorPrivate *priv =
meta_compositor_get_instance_private (compositor);
return meta_plugin_manager_create_inhibit_shortcuts_dialog (priv->plugin_mgr,
window);
}
void
meta_compositor_locate_pointer (MetaCompositor *compositor)
{
MetaCompositorPrivate *priv =
meta_compositor_get_instance_private (compositor);
meta_plugin_manager_locate_pointer (priv->plugin_mgr);
}
MetaPluginManager *
meta_compositor_get_plugin_manager (MetaCompositor *compositor)
{
MetaCompositorPrivate *priv =
meta_compositor_get_instance_private (compositor);
return priv->plugin_mgr;
}
MetaDisplay *
meta_compositor_get_display (MetaCompositor *compositor)
{
MetaCompositorPrivate *priv =
meta_compositor_get_instance_private (compositor);
return priv->display;
}
ClutterStage *
meta_compositor_get_stage (MetaCompositor *compositor)
{
MetaCompositorPrivate *priv =
meta_compositor_get_instance_private (compositor);
return CLUTTER_STAGE (meta_backend_get_stage (priv->backend));
}
MetaWindowActor *
meta_compositor_get_top_window_actor (MetaCompositor *compositor)
{
MetaCompositorPrivate *priv =
meta_compositor_get_instance_private (compositor);
return priv->top_window_actor;
}
gboolean
meta_compositor_is_switching_workspace (MetaCompositor *compositor)
{
MetaCompositorPrivate *priv =
meta_compositor_get_instance_private (compositor);
return priv->switch_workspace_in_progress > 0;
}
MetaLaters *
meta_compositor_get_laters (MetaCompositor *compositor)
{
MetaCompositorPrivate *priv =
meta_compositor_get_instance_private (compositor);
return priv->laters;
}
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