/* -*- 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 #include #include "backends/meta-dnd-private.h" #include "backends/x11/meta-backend-x11.h" #include "clutter/clutter-mutter.h" #include "clutter/x11/clutter-x11.h" #include "compositor/meta-sync-ring.h" #include "compositor/meta-window-actor-x11.h" #include "compositor/meta-window-actor-wayland.h" #include "compositor/meta-window-actor-private.h" #include "compositor/meta-window-group-private.h" #include "core/core.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 "wayland/meta-wayland-private.h" #endif 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) { GList *l; /* Finish hiding and showing actors for the new workspace */ for (l = compositor->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) { /* FIXME -- must redo stacking order */ compositor->switch_workspace_in_progress--; if (compositor->switch_workspace_in_progress < 0) { g_warning ("Error in workspace_switch accounting!"); compositor->switch_workspace_in_progress = 0; } if (!compositor->switch_workspace_in_progress) meta_finish_workspace_switch (compositor); } void meta_compositor_destroy (MetaCompositor *compositor) { g_signal_handler_disconnect (compositor->stage, compositor->stage_after_paint_id); g_signal_handler_disconnect (compositor->stage, compositor->stage_presented_id); compositor->stage_after_paint_id = 0; compositor->stage_presented_id = 0; compositor->stage = NULL; clutter_threads_remove_repaint_func (compositor->pre_paint_func_id); clutter_threads_remove_repaint_func (compositor->post_paint_func_id); if (compositor->top_window_actor) { g_signal_handlers_disconnect_by_func (compositor->top_window_actor, on_top_window_actor_destroyed, compositor); compositor->top_window_actor = NULL; } g_clear_pointer (&compositor->window_group, clutter_actor_destroy); g_clear_pointer (&compositor->top_window_group, clutter_actor_destroy); g_clear_pointer (&compositor->feedback_group, clutter_actor_destroy); g_clear_pointer (&compositor->windows, g_list_free); if (compositor->have_x11_sync_object) meta_sync_ring_destroy (); } static void process_damage (MetaCompositor *compositor, XDamageNotifyEvent *event, MetaWindow *window) { MetaWindowActor *window_actor = META_WINDOW_ACTOR (meta_window_get_compositor_private (window)); meta_window_actor_process_x11_damage (window_actor, event); compositor->frame_has_updated_xsurfaces = TRUE; } /* 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 = get_compositor_for_display (display); return compositor->stage; } /** * 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 = get_compositor_for_display (display); return compositor->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 = get_compositor_for_display (display); return compositor->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 = get_compositor_for_display (display); return compositor->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 = get_compositor_for_display (display); return compositor->windows; } void meta_set_stage_input_region (MetaDisplay *display, XserverRegion region) { /* As a wayland compositor we can simply ignore all this trickery * for setting an input region on the stage for capturing events in * clutter since all input comes to us first and we get to choose * who else sees them. */ if (!meta_is_wayland_compositor ()) { MetaCompositor *compositor = display->compositor; Display *xdpy = meta_x11_display_get_xdisplay (display->x11_display); Window xstage = clutter_x11_get_stage_window (CLUTTER_STAGE (compositor->stage)); XFixesSetWindowShapeRegion (xdpy, xstage, ShapeInput, 0, 0, region); /* It's generally a good heuristic that when a crossing event is generated because * we reshape the overlay, we don't want it to affect focus-follows-mouse focus - * it's not the user doing something, it's the environment changing under the user. */ meta_display_add_ignored_crossing_serial (display, XNextRequest (xdpy)); XFixesSetWindowShapeRegion (xdpy, compositor->output, ShapeInput, 0, 0, region); } } void meta_empty_stage_input_region (MetaDisplay *display) { /* Using a static region here is a bit hacky, but Metacity never opens more than * one XDisplay, so it works fine. */ static XserverRegion region = None; if (region == None) { Display *xdpy = meta_x11_display_get_xdisplay (display->x11_display); region = XFixesCreateRegion (xdpy, NULL, 0); } meta_set_stage_input_region (display, region); } 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 = clutter_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 = clutter_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. */ MetaDisplay *display = compositor->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) { MetaDisplay *display = compositor->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; GList *l; for (l = compositor->windows; l; l = l->next) meta_window_actor_post_paint (l->data); #ifdef HAVE_WAYLAND if (meta_is_wayland_compositor ()) meta_wayland_compositor_paint_finished (meta_wayland_compositor_get_default ()); #endif } 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_manage (MetaCompositor *compositor) { MetaDisplay *display = compositor->display; Display *xdisplay = NULL; MetaBackend *backend = meta_get_backend (); if (display->x11_display) { xdisplay = display->x11_display->xdisplay; meta_x11_display_set_cm_selection (display->x11_display); } compositor->stage = meta_backend_get_stage (backend); compositor->stage_presented_id = g_signal_connect (compositor->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. */ compositor->stage_after_paint_id = g_signal_connect_after (compositor->stage, "after-paint", G_CALLBACK (after_stage_paint), compositor); clutter_stage_set_sync_delay (CLUTTER_STAGE (compositor->stage), META_SYNC_DELAY); compositor->window_group = meta_window_group_new (display); compositor->top_window_group = meta_window_group_new (display); compositor->feedback_group = meta_window_group_new (display); clutter_actor_add_child (compositor->stage, compositor->window_group); clutter_actor_add_child (compositor->stage, compositor->top_window_group); clutter_actor_add_child (compositor->stage, compositor->feedback_group); if (meta_is_wayland_compositor ()) { /* NB: When running as a wayland compositor we don't need an X * composite overlay window, and we don't need to play any input * region tricks to redirect events into clutter. */ compositor->output = None; } else { Window xwin; compositor->output = display->x11_display->composite_overlay_window; xwin = meta_backend_x11_get_xwindow (META_BACKEND_X11 (backend)); XReparentWindow (xdisplay, xwin, compositor->output, 0, 0); meta_empty_stage_input_region (display); /* 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, compositor->output, ShapeBounding, 0, 0, None); /* Map overlay window before redirecting windows offscreen so we catch their * contents until we show the stage. */ XMapWindow (xdisplay, compositor->output); compositor->have_x11_sync_object = meta_sync_ring_init (xdisplay); } if (display->x11_display) redirect_windows (display->x11_display); compositor->plugin_mgr = meta_plugin_manager_new (compositor); } void meta_compositor_unmanage (MetaCompositor *compositor) { if (!meta_is_wayland_compositor ()) { MetaX11Display *display = compositor->display->x11_display; Display *xdisplay = display->xdisplay; Window xroot = display->xroot; /* 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); } } /** * meta_shape_cow_for_window: * @compositor: A #MetaCompositor * @window: (nullable): A #MetaWindow to shape the COW for * * Sets an bounding shape on the COW so that the given window * is exposed. If @window is %NULL it clears the shape again. * * Used so we can unredirect windows, by shaping away the part * of the COW, letting the raw window be seen through below. */ static void meta_shape_cow_for_window (MetaCompositor *compositor, MetaWindow *window) { MetaDisplay *display = compositor->display; Display *xdisplay = meta_x11_display_get_xdisplay (display->x11_display); if (window == NULL) XFixesSetWindowShapeRegion (xdisplay, compositor->output, ShapeBounding, 0, 0, None); else { XserverRegion output_region; XRectangle screen_rect, window_bounds; int width, height; MetaRectangle rect; meta_window_get_frame_rect (window, &rect); window_bounds.x = rect.x; window_bounds.y = rect.y; window_bounds.width = rect.width; window_bounds.height = rect.height; meta_display_get_size (display, &width, &height); screen_rect.x = 0; screen_rect.y = 0; screen_rect.width = width; screen_rect.height = height; output_region = XFixesCreateRegion (xdisplay, &window_bounds, 1); XFixesInvertRegion (xdisplay, output_region, &screen_rect, output_region); XFixesSetWindowShapeRegion (xdisplay, compositor->output, ShapeBounding, 0, 0, output_region); XFixesDestroyRegion (xdisplay, output_region); } } static void set_unredirected_window (MetaCompositor *compositor, MetaWindow *window) { if (compositor->unredirected_window == window) return; if (compositor->unredirected_window != NULL) { MetaWindowActor *window_actor = META_WINDOW_ACTOR (meta_window_get_compositor_private (compositor->unredirected_window)); meta_window_actor_set_unredirected (window_actor, FALSE); } meta_shape_cow_for_window (compositor, window); compositor->unredirected_window = window; if (compositor->unredirected_window != NULL) { MetaWindowActor *window_actor = META_WINDOW_ACTOR (meta_window_get_compositor_private (compositor->unredirected_window)); meta_window_actor_set_unredirected (window_actor, TRUE); } } void meta_compositor_add_window (MetaCompositor *compositor, MetaWindow *window) { 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; case META_WINDOW_CLIENT_TYPE_WAYLAND: window_actor_type = META_TYPE_WINDOW_ACTOR_WAYLAND; break; } window_actor = g_object_new (window_actor_type, "meta-window", window, NULL); if (window->layer == META_LAYER_OVERRIDE_REDIRECT) window_group = compositor->top_window_group; else window_group = compositor->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. */ compositor->windows = g_list_append (compositor->windows, window_actor); sync_actor_stacking (compositor); } void meta_compositor_remove_window (MetaCompositor *compositor, MetaWindow *window) { MetaWindowActor *window_actor = META_WINDOW_ACTOR (meta_window_get_compositor_private (window)); if (compositor->unredirected_window == window) set_unredirected_window (compositor, NULL); meta_window_actor_queue_destroy (window_actor); } void meta_compositor_sync_updates_frozen (MetaCompositor *compositor, MetaWindow *window) { MetaWindowActor *window_actor = META_WINDOW_ACTOR (meta_window_get_compositor_private (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 (meta_window_get_compositor_private (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 (meta_window_get_compositor_private (window)); if (!window_actor) return; meta_window_actor_update_shape (window_actor); } void meta_compositor_window_opacity_changed (MetaCompositor *compositor, MetaWindow *window) { MetaWindowActor *window_actor; window_actor = META_WINDOW_ACTOR (meta_window_get_compositor_private (window)); if (!window_actor) return; meta_window_actor_update_opacity (window_actor); } void meta_compositor_window_surface_changed (MetaCompositor *compositor, MetaWindow *window) { MetaWindowActor *window_actor; window_actor = META_WINDOW_ACTOR (meta_window_get_compositor_private (window)); if (!window_actor) return; meta_window_actor_update_surface (window_actor); } /** * meta_compositor_process_event: (skip) * @compositor: * @event: * @window: * */ gboolean meta_compositor_process_event (MetaCompositor *compositor, XEvent *event, MetaWindow *window) { MetaX11Display *x11_display = compositor->display->x11_display; if (!meta_is_wayland_compositor () && event->type == meta_x11_display_get_damage_event_base (x11_display) + XDamageNotify) { /* Core code doesn't handle damage events, so we need to extract the MetaWindow * ourselves */ if (window == NULL) { Window xwin = ((XDamageNotifyEvent *) event)->drawable; window = meta_x11_display_lookup_x_window (x11_display, xwin); } if (window) process_damage (compositor, (XDamageNotifyEvent *) event, window); } if (compositor->have_x11_sync_object) meta_sync_ring_handle_event (event); /* Clutter needs to know about MapNotify events otherwise it will think the stage is invisible */ if (!meta_is_wayland_compositor () && event->type == MapNotify) clutter_x11_handle_event (event); /* The above handling is basically just "observing" the events, so we return * FALSE to indicate that the event should not be filtered out; if we have * GTK+ windows in the same process, GTK+ needs the ConfigureNotify event, for example. */ return FALSE; } gboolean meta_compositor_filter_keybinding (MetaCompositor *compositor, MetaKeyBinding *binding) { return meta_plugin_manager_filter_keybinding (compositor->plugin_mgr, binding); } void meta_compositor_show_window (MetaCompositor *compositor, MetaWindow *window, MetaCompEffect effect) { MetaWindowActor *window_actor = META_WINDOW_ACTOR (meta_window_get_compositor_private (window)); meta_window_actor_show (window_actor, effect); } void meta_compositor_hide_window (MetaCompositor *compositor, MetaWindow *window, MetaCompEffect effect) { MetaWindowActor *window_actor = META_WINDOW_ACTOR (meta_window_get_compositor_private (window)); meta_window_actor_hide (window_actor, effect); meta_stack_tracker_queue_sync_stack (compositor->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 (meta_window_get_compositor_private (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) { gint to_indx, from_indx; to_indx = meta_workspace_index (to); from_indx = meta_workspace_index (from); compositor->switch_workspace_in_progress++; if (!meta_plugin_manager_switch_workspace (compositor->plugin_mgr, from_indx, to_indx, direction)) { compositor->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) { 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 (compositor->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 = compositor->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 (compositor->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) { GList *l; for (l = g_list_last (compositor->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 (compositor->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) { compositor->top_window_actor = NULL; compositor->windows = g_list_remove (compositor->windows, window_actor); meta_stack_tracker_queue_sync_stack (compositor->display->stack_tracker); } void meta_compositor_sync_stack (MetaCompositor *compositor, GList *stack) { 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 (compositor->windows); /* The old stack of MetaWindowActor */ compositor->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 (meta_window_get_compositor_private (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.) */ compositor->windows = g_list_prepend (compositor->windows, actor); stack = g_list_remove (stack, window); old_stack = g_list_remove (old_stack, actor); } sync_actor_stacking (compositor); if (compositor->top_window_actor) g_signal_handlers_disconnect_by_func (compositor->top_window_actor, on_top_window_actor_destroyed, compositor); compositor->top_window_actor = get_top_visible_window_actor (compositor); if (compositor->top_window_actor) g_signal_connect (compositor->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) { MetaWindowActor *window_actor = META_WINDOW_ACTOR (meta_window_get_compositor_private (window)); meta_window_actor_sync_actor_geometry (window_actor, did_placement); meta_plugin_manager_event_size_changed (compositor->plugin_mgr, window_actor); } static void on_presented (ClutterStage *stage, CoglFrameEvent event, ClutterFrameInfo *frame_info, MetaCompositor *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 (compositor->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 = compositor->windows; l; l = l->next) meta_window_actor_frame_complete (l->data, frame_info, presentation_time); } } static gboolean meta_pre_paint_func (gpointer data) { GList *l; MetaWindowActor *top_window_actor; MetaCompositor *compositor = data; if (compositor->windows == NULL) return TRUE; top_window_actor = compositor->top_window_actor; if (top_window_actor && meta_window_actor_should_unredirect (top_window_actor) && compositor->disable_unredirect_count == 0) { MetaWindow *top_window; top_window = meta_window_actor_get_meta_window (top_window_actor); set_unredirected_window (compositor, top_window); } else { set_unredirected_window (compositor, NULL); } for (l = compositor->windows; l; l = l->next) meta_window_actor_pre_paint (l->data); if (compositor->frame_has_updated_xsurfaces) { /* We need to make sure that any X drawing that happens before * the XDamageSubtract() for each window above is visible to * subsequent GL rendering; the standardized way to do this is * GL_EXT_X11_sync_object. Since this isn't implemented yet in * mesa, we also have a path that relies on the implementation * of the open source drivers. * * Anything else, we just hope for the best. * * Xorg and open source driver specifics: * * The X server makes sure to flush drawing to the kernel before * sending out damage events, but since we use * DamageReportBoundingBox there may be drawing between the last * damage event and the XDamageSubtract() that needs to be * flushed as well. * * Xorg always makes sure that drawing is flushed to the kernel * before writing events or responses to the client, so any * round trip request at this point is sufficient to flush the * GLX buffers. */ if (compositor->have_x11_sync_object) compositor->have_x11_sync_object = meta_sync_ring_insert_wait (); else XSync (compositor->display->x11_display->xdisplay, False); } return TRUE; } static gboolean meta_post_paint_func (gpointer data) { MetaCompositor *compositor = data; CoglGraphicsResetStatus status; if (compositor->frame_has_updated_xsurfaces) { if (compositor->have_x11_sync_object) compositor->have_x11_sync_object = meta_sync_ring_after_frame (); compositor->frame_has_updated_xsurfaces = FALSE; } status = cogl_get_graphics_reset_status (compositor->context); switch (status) { case COGL_GRAPHICS_RESET_STATUS_NO_ERROR: break; case COGL_GRAPHICS_RESET_STATUS_PURGED_CONTEXT_RESET: g_signal_emit_by_name (compositor->display, "gl-video-memory-purged"); clutter_actor_queue_redraw (CLUTTER_ACTOR (compositor->stage)); 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; } return TRUE; } static void on_shadow_factory_changed (MetaShadowFactory *factory, MetaCompositor *compositor) { GList *l; for (l = compositor->windows; l; l = l->next) meta_window_actor_invalidate_shadow (l->data); } /** * meta_compositor_new: (skip) * @display: * */ MetaCompositor * meta_compositor_new (MetaDisplay *display) { MetaBackend *backend = meta_get_backend (); ClutterBackend *clutter_backend = meta_backend_get_clutter_backend (backend); MetaCompositor *compositor; compositor = g_new0 (MetaCompositor, 1); compositor->display = display; compositor->context = clutter_backend->cogl_context; g_signal_connect (meta_shadow_factory_get_default (), "changed", G_CALLBACK (on_shadow_factory_changed), compositor); compositor->pre_paint_func_id = clutter_threads_add_repaint_func_full (CLUTTER_REPAINT_FLAGS_PRE_PAINT, meta_pre_paint_func, compositor, NULL); compositor->post_paint_func_id = clutter_threads_add_repaint_func_full (CLUTTER_REPAINT_FLAGS_POST_PAINT, meta_post_paint_func, compositor, NULL); return compositor; } /** * meta_get_overlay_window: (skip) * @display: a #MetaDisplay * */ Window meta_get_overlay_window (MetaDisplay *display) { MetaCompositor *compositor = get_compositor_for_display (display); return compositor->output; } /** * 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 = get_compositor_for_display (display); compositor->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 = get_compositor_for_display (display); if (compositor->disable_unredirect_count == 0) g_warning ("Called enable_unredirect_for_display while unredirection is enabled."); if (compositor->disable_unredirect_count > 0) compositor->disable_unredirect_count--; } #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_get_compositor_private (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; if (compositor->server_time_query_time == 0 || (!compositor->server_time_is_monotonic_time && monotonic_time > compositor->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 (); compositor->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) compositor->server_time_is_monotonic_time = TRUE; compositor->server_time_offset = server_time_usec - current_monotonic_time; } if (compositor->server_time_is_monotonic_time) return monotonic_time; else return monotonic_time + compositor->server_time_offset; } void meta_compositor_show_tile_preview (MetaCompositor *compositor, MetaWindow *window, MetaRectangle *tile_rect, int tile_monitor_number) { meta_plugin_manager_show_tile_preview (compositor->plugin_mgr, window, tile_rect, tile_monitor_number); } void meta_compositor_hide_tile_preview (MetaCompositor *compositor) { meta_plugin_manager_hide_tile_preview (compositor->plugin_mgr); } void meta_compositor_show_window_menu (MetaCompositor *compositor, MetaWindow *window, MetaWindowMenuType menu, int x, int y) { meta_plugin_manager_show_window_menu (compositor->plugin_mgr, window, menu, x, y); } void meta_compositor_show_window_menu_for_rect (MetaCompositor *compositor, MetaWindow *window, MetaWindowMenuType menu, MetaRectangle *rect) { meta_plugin_manager_show_window_menu_for_rect (compositor->plugin_mgr, window, menu, rect); } MetaCloseDialog * meta_compositor_create_close_dialog (MetaCompositor *compositor, MetaWindow *window) { return meta_plugin_manager_create_close_dialog (compositor->plugin_mgr, window); } MetaInhibitShortcutsDialog * meta_compositor_create_inhibit_shortcuts_dialog (MetaCompositor *compositor, MetaWindow *window) { return meta_plugin_manager_create_inhibit_shortcuts_dialog (compositor->plugin_mgr, window); }