/* -*- 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. * * meta_compositor_maximize_window() and meta_compositor_unmaximize_window() * are transitions within the visible state. The window is resized __before__ * the call, so it may be necessary to readjust the display based on the * old_rect to start the animation. * * # 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_screen() * - top window group, accessible with meta_get_top_window_group_for_screen() * * Muffin 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 #include #include #include #include #include "compositor-private.h" #include #include "xprops.h" #include #include #include #include "meta-window-actor-private.h" #include "meta-window-group.h" #include "meta-background-actor-private.h" #include "window-private.h" /* to check window->hidden */ #include "display-private.h" /* for meta_display_lookup_x_window() */ #include "util-private.h" #include #include #include "meta-sync-ring.h" /* #define DEBUG_TRACE g_print */ #define DEBUG_TRACE(X) static MetaCompositor *compositor_global = NULL; static void frame_callback (ClutterStage *stage, CoglFrameEvent event, ClutterFrameInfo *frame_info, MetaCompositor *compositor); static inline gboolean composite_at_least_version (MetaDisplay *display, int maj, int min) { static int major = -1; static int minor = -1; if (major == -1) meta_display_get_compositor_version (display, &major, &minor); return (major > maj || (major == maj && minor >= min)); } 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 in case the plugin messed it up. */ sync_actor_stacking (compositor); /* printf ("... FINISHED DESKTOP SWITCH\n"); */ } LOCAL_SYMBOL void meta_switch_workspace_completed (MetaScreen *screen) { MetaCompositor *compositor = screen->display->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) { clutter_threads_remove_repaint_func (compositor->pre_paint_func_id); clutter_threads_remove_repaint_func (compositor->post_paint_func_id); if (compositor->have_x11_sync_object) meta_sync_ring_destroy (); } static void add_win (MetaWindow *window) { meta_window_actor_new (window); sync_actor_stacking (window->screen->display->compositor); } static void process_damage (MetaCompositor *compositor, XDamageNotifyEvent *event, MetaWindow *window) { MetaWindowActor *window_actor; if (window == NULL) return; window_actor = META_WINDOW_ACTOR (meta_window_get_compositor_private (window)); if (window_actor == NULL) return; meta_window_actor_process_damage (window_actor, event); compositor->frame_has_updated_xsurfaces = TRUE; } 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"); } 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 = screen->composite_overlay_window; if (XGetWindowAttributes (xdisplay, output, &attr)) { event_mask |= attr.your_event_mask; } XSelectInput (xdisplay, output, event_mask); return output; } /** * meta_get_stage_for_screen: * @screen: a #MetaScreen * * Returns: (transfer none): The #ClutterStage for the screen */ ClutterActor * meta_get_stage_for_screen (MetaScreen *screen) { return screen->display->compositor->stage; } /** * meta_get_overlay_group_for_screen: * @screen: a #MetaScreen * * Returns: (transfer none): The overlay group corresponding to @screen */ ClutterActor * meta_get_overlay_group_for_screen (MetaScreen *screen) { return screen->display->compositor->overlay_group; } /** * meta_get_window_group_for_screen: * @screen: a #MetaScreen * * Returns: (transfer none): The window group corresponding to @screen */ ClutterActor * meta_get_window_group_for_screen (MetaScreen *screen) { return screen->display->compositor->window_group; } /** * meta_get_bottom_window_group_for_screen: * @screen: a #MetaScreen * * Returns: (transfer none): The bottom window group corresponding to @screen */ ClutterActor * meta_get_bottom_window_group_for_screen (MetaScreen *screen) { return screen->display->compositor->bottom_window_group; } /** * meta_get_top_window_group_for_screen: * @screen: a #MetaScreen * * Returns: (transfer none): The top window group corresponding to @screen */ ClutterActor * meta_get_top_window_group_for_screen (MetaScreen *screen) { return screen->display->compositor->top_window_group; } /** * meta_get_background_actor_for_screen: * @screen: a #MetaScreen * * Gets the actor that draws the root window background under the windows. * The root window background automatically tracks the image or color set * by the environment. * * Returns: (transfer none): The background actor corresponding to @screen */ ClutterActor * meta_get_background_actor_for_screen (MetaScreen *screen) { return screen->display->compositor->background_actor; } /** * meta_get_window_actors: * @screen: a #MetaScreen * * Returns: (transfer none) (element-type Clutter.Actor): The set of #MetaWindowActor on @screen */ GList * meta_get_window_actors (MetaScreen *screen) { return screen->display->compositor->windows; } static void do_set_stage_input_region (MetaScreen *screen, XserverRegion region) { MetaDisplay *display = screen->display; MetaCompositor *compositor = display->compositor; Display *xdpy = display->xdisplay; 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_set_stage_input_region (MetaScreen *screen, XserverRegion region) { MetaDisplay *display = screen->display; MetaCompositor *compositor = display->compositor; Display *xdpy = display->xdisplay; if (compositor->stage && compositor->output) { do_set_stage_input_region (screen, region); } else { /* Reset compositor->pending_input_region if one existed before and set the new * one to use it later. */ if (compositor->pending_input_region) { XFixesDestroyRegion (xdpy, compositor->pending_input_region); compositor->pending_input_region = None; } if (region != None) { compositor->pending_input_region = XFixesCreateRegion (xdpy, NULL, 0); XFixesCopyRegion (xdpy, compositor->pending_input_region, region); } } } void meta_empty_stage_input_region (MetaScreen *screen) { /* 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) { MetaDisplay *display = meta_screen_get_display (screen); Display *xdpy = meta_display_get_xdisplay (display); region = XFixesCreateRegion (xdpy, NULL, 0); } meta_set_stage_input_region (screen, region); } LOCAL_SYMBOL gboolean meta_begin_modal_for_plugin (MetaScreen *screen, MetaPlugin *plugin, Window grab_window, Cursor cursor, 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 = meta_screen_get_display (screen); Display *xdpy = meta_display_get_xdisplay (display); MetaCompositor *compositor = display->compositor; gboolean pointer_grabbed = FALSE; int result; if (compositor->modal_plugin != NULL || display->grab_op != META_GRAB_OP_NONE) return FALSE; if ((options & META_MODAL_POINTER_ALREADY_GRABBED) == 0) { result = XGrabPointer (xdpy, grab_window, False, /* owner_events */ (ButtonPressMask | ButtonReleaseMask | EnterWindowMask | LeaveWindowMask | PointerMotionMask), GrabModeAsync, GrabModeAsync, None, /* confine to */ cursor, timestamp); if (result != Success) goto fail; pointer_grabbed = TRUE; } if ((options & META_MODAL_KEYBOARD_ALREADY_GRABBED) == 0) { result = XGrabKeyboard (xdpy, grab_window, False, /* owner_events */ GrabModeAsync, GrabModeAsync, timestamp); if (result != Success) goto fail; } display->grab_op = META_GRAB_OP_COMPOSITOR; display->grab_window = NULL; display->grab_screen = screen; display->grab_have_pointer = TRUE; display->grab_have_keyboard = TRUE; compositor->modal_plugin = plugin; return TRUE; fail: if (pointer_grabbed) XUngrabPointer (xdpy, timestamp); return FALSE; } LOCAL_SYMBOL void meta_end_modal_for_plugin (MetaScreen *screen, MetaPlugin *plugin, guint32 timestamp) { MetaDisplay *display = meta_screen_get_display (screen); Display *xdpy = meta_display_get_xdisplay (display); MetaCompositor *compositor = display->compositor; g_return_if_fail (compositor->modal_plugin == plugin); XUngrabPointer (xdpy, timestamp); XUngrabKeyboard (xdpy, timestamp); display->grab_op = META_GRAB_OP_NONE; display->grab_window = NULL; display->grab_screen = NULL; display->grab_have_pointer = FALSE; display->grab_have_keyboard = FALSE; compositor->modal_plugin = NULL; } /* This is used when reloading plugins to make sure we don't have * a left-over modal grab for this screen. */ LOCAL_SYMBOL void meta_check_end_modal (MetaScreen *screen) { MetaDisplay *display = meta_screen_get_display (screen); MetaCompositor *compositor = display->compositor; if (compositor->modal_plugin && meta_plugin_get_screen (compositor->modal_plugin) == screen) { meta_end_modal_for_plugin (screen, compositor->modal_plugin, CurrentTime); } } static void after_stage_paint (ClutterStage *stage, gpointer data) { MetaCompositor *compositor = (MetaCompositor*) data; GList *l; for (l = compositor->windows; l; l = l->next) meta_window_actor_post_paint (l->data); } static void redirect_windows (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); 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 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); } } LOCAL_SYMBOL void meta_compositor_toggle_send_frame_timings (MetaScreen *screen) { MetaCompositor *compositor = screen->display->compositor; if (meta_prefs_get_send_frame_timings()) { g_signal_connect_after (CLUTTER_STAGE (compositor->stage), "presented", G_CALLBACK (frame_callback), compositor); } else { g_signal_handlers_disconnect_by_func (CLUTTER_STAGE (compositor->stage), frame_callback, NULL); } } void meta_compositor_manage_screen (MetaCompositor *compositor, MetaScreen *screen) { MetaDisplay *display = meta_screen_get_display (screen); Display *xdisplay = meta_display_get_xdisplay (display); Window xwin; gint width, height; XWindowAttributes attr; long event_mask; redirect_windows (compositor, screen); /* * 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 compositor->pending_input_region to an empty region explicitly, * because None value is used to mean that the whole screen is an input region. */ compositor->pending_input_region = XFixesCreateRegion (xdisplay, NULL, 0); compositor->screen = screen; compositor->output = None; compositor->windows = NULL; meta_screen_set_cm_selection (screen); compositor->stage = clutter_stage_new (); meta_compositor_toggle_send_frame_timings(screen); g_signal_connect_after (CLUTTER_STAGE (compositor->stage), "after-paint", G_CALLBACK (after_stage_paint), compositor); clutter_stage_set_sync_delay (CLUTTER_STAGE (compositor->stage), META_SYNC_DELAY); meta_screen_get_size (screen, &width, &height); clutter_actor_realize (compositor->stage); xwin = clutter_x11_get_stage_window (CLUTTER_STAGE (compositor->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); compositor->window_group = meta_window_group_new (screen); compositor->background_actor = meta_background_actor_new_for_screen (screen); compositor->bottom_window_group = clutter_actor_new(); compositor->overlay_group = clutter_actor_new (); compositor->top_window_group = meta_window_group_new (screen); compositor->hidden_group = clutter_actor_new (); clutter_actor_add_child (compositor->window_group, compositor->background_actor); 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->overlay_group); clutter_actor_add_child (compositor->stage, compositor->hidden_group); clutter_actor_hide (compositor->hidden_group); compositor->plugin_mgr = meta_plugin_manager_new (screen); /* * 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. */ compositor->output = get_output_window (screen); XReparentWindow (xdisplay, xwin, compositor->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, compositor->output, ShapeBounding, 0, 0, None); do_set_stage_input_region (screen, compositor->pending_input_region); if (compositor->pending_input_region != None) { XFixesDestroyRegion (xdisplay, compositor->pending_input_region); compositor->pending_input_region = None; } clutter_actor_show (compositor->overlay_group); clutter_actor_show (compositor->stage); /* 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); } 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); } /* * Shapes the cow so that the given window is exposed, * when metaWindow is NULL it clears the shape again */ static void meta_shape_cow_for_window (MetaScreen *screen, MetaWindow *metaWindow) { MetaDisplay *display = screen->display; MetaCompositor *compositor = display->compositor; Display *xdisplay = display->xdisplay; if (metaWindow == 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_outer_rect (metaWindow, &rect); window_bounds.x = rect.x; window_bounds.y = rect.y; window_bounds.width = rect.width; window_bounds.height = rect.height; meta_screen_get_size (screen, &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); } } void meta_compositor_add_window (MetaCompositor *compositor, MetaWindow *window) { MetaScreen *screen = meta_window_get_screen (window); MetaDisplay *display = meta_screen_get_display (screen); DEBUG_TRACE ("meta_compositor_add_window\n"); meta_error_trap_push (display); add_win (window); meta_error_trap_pop (display); } void meta_compositor_remove_window (MetaCompositor *compositor, MetaWindow *window) { MetaWindowActor *window_actor = NULL; MetaScreen *screen; DEBUG_TRACE ("meta_compositor_remove_window\n"); window_actor = META_WINDOW_ACTOR (meta_window_get_compositor_private (window)); if (!window_actor) return; screen = window->screen; if (window_actor == compositor->unredirected_window) { meta_window_actor_set_redirected (window_actor, TRUE); meta_shape_cow_for_window (screen, NULL); compositor->unredirected_window = NULL; } meta_window_actor_destroy (window_actor); } void meta_compositor_set_updates_frozen (MetaCompositor *compositor, MetaWindow *window, gboolean updates_frozen) { MetaWindowActor *window_actor; DEBUG_TRACE ("meta_compositor_set_updates_frozen\n"); window_actor = META_WINDOW_ACTOR (meta_window_get_compositor_private (window)); if (!window_actor) return; meta_window_actor_set_updates_frozen (window_actor, updates_frozen); } void meta_compositor_queue_frame_drawn (MetaCompositor *compositor, MetaWindow *window, gboolean no_delay_frame) { MetaWindowActor *window_actor; DEBUG_TRACE ("meta_compositor_queue_frame_drawn\n"); window_actor = META_WINDOW_ACTOR (meta_window_get_compositor_private (window)); if (!window_actor) return; meta_window_actor_queue_frame_drawn (window_actor, no_delay_frame); } static gboolean is_grabbed_event (XEvent *event) { switch (event->xany.type) { case ButtonPress: case ButtonRelease: case EnterNotify: case LeaveNotify: case MotionNotify: case KeyPress: case KeyRelease: return TRUE; } return FALSE; } 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); } /** * meta_compositor_process_event: (skip) * */ gboolean meta_compositor_process_event (MetaCompositor *compositor, XEvent *event, MetaWindow *window) { if (compositor->modal_plugin && is_grabbed_event (event)) { MetaPluginClass *klass = META_PLUGIN_GET_CLASS (compositor->modal_plugin); if (klass->xevent_filter) klass->xevent_filter (compositor->modal_plugin, event); /* We always consume events even if the plugin says it didn't handle them; * exclusive is exclusive */ return TRUE; } if (meta_plugin_manager_xevent_filter (compositor->plugin_mgr, event)) { DEBUG_TRACE ("meta_compositor_process_event (filtered,window==NULL)\n"); return TRUE; } switch (event->type) { case PropertyNotify: process_property_notify (compositor, (XPropertyEvent *) event, window); break; default: if (event->type == meta_display_get_damage_event_base (compositor->display) + XDamageNotify) { /* Core code doesn't handle damage events, so we need to extract the MetaWindow * ourselves */ if (window == NULL) { Window xwin = ((XDamageNotifyEvent *) event)->drawable; window = meta_display_lookup_x_window (compositor->display, xwin); } DEBUG_TRACE ("meta_compositor_process_event (process_damage)\n"); if (window) process_damage (compositor, (XDamageNotifyEvent *) event, window); } break; } 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 (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; } void meta_compositor_show_window (MetaCompositor *compositor, MetaWindow *window, MetaCompEffect effect) { MetaWindowActor *window_actor = META_WINDOW_ACTOR (meta_window_get_compositor_private (window)); DEBUG_TRACE ("meta_compositor_show_window\n"); if (!window_actor) return; 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)); DEBUG_TRACE ("meta_compositor_hide_window\n"); if (!window_actor) return; meta_window_actor_hide (window_actor, effect); } void meta_compositor_maximize_window (MetaCompositor *compositor, MetaWindow *window, MetaRectangle *old_rect, MetaRectangle *new_rect) { MetaWindowActor *window_actor = META_WINDOW_ACTOR (meta_window_get_compositor_private (window)); DEBUG_TRACE ("meta_compositor_maximize_window\n"); if (!window_actor) return; meta_window_actor_maximize (window_actor, old_rect, new_rect); } void meta_compositor_unmaximize_window (MetaCompositor *compositor, MetaWindow *window, MetaRectangle *old_rect, MetaRectangle *new_rect) { MetaWindowActor *window_actor = META_WINDOW_ACTOR (meta_window_get_compositor_private (window)); DEBUG_TRACE ("meta_compositor_unmaximize_window\n"); if (!window_actor) return; meta_window_actor_unmaximize (window_actor, old_rect, new_rect); } void meta_compositor_switch_workspace (MetaCompositor *compositor, MetaScreen *screen, MetaWorkspace *from, MetaWorkspace *to, MetaMotionDirection direction) { gint to_indx, from_indx; to_indx = meta_workspace_index (to); from_indx = meta_workspace_index (from); DEBUG_TRACE ("meta_compositor_switch_workspace\n"); compositor->switch_workspace_in_progress++; if (!compositor->plugin_mgr || !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); } } void meta_compositor_tile_window (MetaCompositor *compositor, MetaWindow *window, MetaRectangle *old_rect, MetaRectangle *new_rect) { MetaWindowActor *window_actor = META_WINDOW_ACTOR (meta_window_get_compositor_private (window)); DEBUG_TRACE ("meta_compositor_tile_window\n"); if (!window_actor) return; meta_window_actor_tile (window_actor, old_rect, new_rect); } static void sync_actor_stacking (MetaCompositor *compositor) { GList *children; GList *tmp; GList *old; 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); reordered = FALSE; old = children; /* 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.) */ /* Of the actors we know, the bottom actor should be the background actor */ while (old && old->data != compositor->background_actor && !META_IS_WINDOW_ACTOR (old->data)) old = old->next; if (old == NULL || old->data != compositor->background_actor) { reordered = TRUE; goto done_with_check; } /* Then the window actors should follow in sequence */ old = old->next; for (tmp = compositor->windows; tmp != NULL; tmp = tmp->next) { while (old && !META_IS_WINDOW_ACTOR (old->data)) old = old->next; /* old == NULL: someone reparented a window out of the window group, * order undefined, always restack */ if (old == NULL || old->data != tmp->data) { reordered = TRUE; goto done_with_check; } old = old->next; } done_with_check: g_list_free (children); if (!reordered) return; ClutterActor *parent; for (tmp = g_list_last (compositor->windows); tmp != NULL; tmp = tmp->prev) { ClutterActor *actor = tmp->data; parent = clutter_actor_get_parent (actor); clutter_actor_set_child_below_sibling (parent, actor, NULL); } parent = clutter_actor_get_parent (compositor->background_actor); clutter_actor_set_child_below_sibling (parent, compositor->background_actor, NULL); } void meta_compositor_sync_stack (MetaCompositor *compositor, MetaScreen *screen, GList *stack) { GList *old_stack; DEBUG_TRACE ("meta_compositor_sync_stack\n"); /* 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); } 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)); DEBUG_TRACE ("meta_compositor_sync_window_geometry\n"); if (!window_actor) return; meta_window_actor_sync_actor_geometry (window_actor, did_placement); } void meta_compositor_sync_screen_size (MetaCompositor *compositor, MetaScreen *screen, guint width, guint height) { MetaDisplay *display = compositor->display; Display *xdisplay; Window xwin; DEBUG_TRACE ("meta_compositor_sync_screen_size\n"); xdisplay = meta_display_get_xdisplay (display); xwin = clutter_x11_get_stage_window (CLUTTER_STAGE (compositor->stage)); XResizeWindow (xdisplay, xwin, width, height); meta_background_actor_screen_size_changed (screen); meta_verbose ("Changed size for stage on screen %d to %dx%d\n", meta_screen_get_screen_number (screen), width, height); } static void frame_callback (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; MetaCompositor *compositor = data; GSList *screens = compositor->display->screens; MetaWindowActor *top_window; MetaWindowActor *expected_unredirected_window = NULL; if (compositor->windows == NULL) return TRUE; top_window = g_list_last (compositor->windows)->data; if (meta_window_actor_should_unredirect (top_window) && compositor->disable_unredirect_count == 0) expected_unredirected_window = top_window; if (compositor->unredirected_window != expected_unredirected_window) { if (compositor->unredirected_window != NULL) { meta_window_actor_set_redirected (compositor->unredirected_window, TRUE); meta_shape_cow_for_window (compositor->display->active_screen, NULL); } if (expected_unredirected_window != NULL) { meta_shape_cow_for_window (compositor->display->active_screen, meta_window_actor_get_meta_window (top_window)); meta_window_actor_set_redirected (top_window, FALSE); } compositor->unredirected_window = expected_unredirected_window; } 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->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. */ meta_restart (); break; } return TRUE; } void meta_compositor_on_shadow_factory_changed (void) { GList *l; for (l = compositor_global->windows; l; l = l->next) meta_window_actor_invalidate_shadow (l->data); } /** * meta_compositor_new: (skip) * */ MetaCompositor * meta_compositor_new (MetaDisplay *display) { char *atom_names[] = { "_XROOTPMAP_ID", "_XSETROOT_ID", "_NET_WM_WINDOW_OPACITY", }; Atom atoms[G_N_ELEMENTS(atom_names)]; MetaCompositor *compositor; Display *xdisplay = meta_display_get_xdisplay (display); if (!composite_at_least_version (display, 0, 3)) return NULL; compositor = g_new0 (MetaCompositor, 1); compositor->display = display; compositor->context = clutter_backend_get_cogl_context (clutter_get_default_backend ()); if (g_getenv("META_DISABLE_MIPMAPS")) compositor->no_mipmaps = TRUE; meta_verbose ("Creating %d atoms\n", (int) G_N_ELEMENTS (atom_names)); XInternAtoms (xdisplay, atom_names, G_N_ELEMENTS (atom_names), False, atoms); compositor->atom_x_root_pixmap = atoms[0]; compositor->atom_x_set_root = atoms[1]; compositor->atom_net_wm_window_opacity = atoms[2]; 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); compositor_global = compositor; return compositor; } /** * meta_get_overlay_window: (skip) * */ Window meta_get_overlay_window (MetaScreen *screen) { return screen->display->compositor->output; } /** * meta_disable_unredirect_for_screen: * @screen: a #MetaScreen * * Disables unredirection, can be usefull in situations where having * unredirected windows is undesireable like when recording a video. * */ void meta_disable_unredirect_for_screen (MetaScreen *screen) { MetaCompositor *compositor = screen->display->compositor; compositor->disable_unredirect_count = compositor->disable_unredirect_count + 1; } /** * meta_enable_unredirect_for_screen: * @screen: a #MetaScreen * * Enables unredirection which reduces the overhead for apps like games. * */ void meta_enable_unredirect_for_screen (MetaScreen *screen) { MetaCompositor *compositor = screen->display->compositor; if (compositor->disable_unredirect_count == 0) g_warning ("Called enable_unredirect_for_screen while unredirection is enabled."); if (compositor->disable_unredirect_count > 0) compositor->disable_unredirect_count = compositor->disable_unredirect_count - 1; } #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_screen (MetaCompositor *compositor, MetaScreen *screen) { ClutterActor *stage; ClutterActor *flash; ClutterTransition *transition; gfloat width, height; stage = meta_get_stage_for_screen (screen); 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); } void meta_compositor_show_tile_preview (MetaCompositor *compositor, MetaScreen *screen, MetaWindow *window, MetaRectangle *tile_rect, int tile_monitor_number, guint snap_queued) { meta_plugin_manager_show_tile_preview (compositor->plugin_mgr, window, tile_rect, tile_monitor_number, snap_queued); } void meta_compositor_hide_tile_preview (MetaCompositor *compositor, MetaScreen *screen) { meta_plugin_manager_hide_tile_preview (compositor->plugin_mgr); } void meta_compositor_show_hud_preview (MetaCompositor *compositor, MetaScreen *screen, guint current_proximity_zone, MetaRectangle *work_area, guint snap_queued) { meta_plugin_manager_show_hud_preview (compositor->plugin_mgr, current_proximity_zone, work_area, snap_queued); } void meta_compositor_hide_hud_preview (MetaCompositor *compositor, MetaScreen *screen) { meta_plugin_manager_hide_hud_preview (compositor->plugin_mgr); } /** * 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_grab_op_begin (MetaCompositor *compositor) { // CLUTTER_ACTOR_NO_LAYOUT set on the window group improves responsiveness of windows, // but causes windows to flicker in and out of view sporadically on some configurations // while dragging windows. Make sure it is disabled during the grab. clutter_actor_unset_flags (compositor->window_group, CLUTTER_ACTOR_NO_LAYOUT); } void meta_compositor_grab_op_end (MetaCompositor *compositor) { clutter_actor_set_flags (compositor->window_group, CLUTTER_ACTOR_NO_LAYOUT); } CoglContext * meta_compositor_get_cogl_context (void) { return compositor_global->context; } void meta_compositor_update_sync_state (MetaCompositor *compositor, MetaSyncMethod method) { clutter_stage_x11_update_sync_state (compositor->stage, method); }