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5be29cf9bc
The method of ClutterTimeline that advances the timeline by a delta (in millisecond) is going to be useful for testing the timeline's behaviour -- and unbreak the timeline test suite that was broken by the MasterClock merge.
365 lines
10 KiB
C
365 lines
10 KiB
C
/*
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* Clutter.
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*
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* An OpenGL based 'interactive canvas' library.
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*
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* Authored By: Emmanuele Bassi <ebassi@linux.intel.com>
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*
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* Copyright (C) 2009 Intel Corporation.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*/
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/*
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* SECTION:clutter-master-clock
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* @short_description: The master clock for all animations
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*
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* The #ClutterMasterClock class is responsible for advancing all
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* #ClutterTimelines when a stage is being redrawn. The master clock
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* makes sure that the scenegraph is always integrally updated before
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* painting it.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "clutter-master-clock.h"
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#include "clutter-debug.h"
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#include "clutter-private.h"
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#define CLUTTER_MASTER_CLOCK_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), CLUTTER_TYPE_MASTER_CLOCK, ClutterMasterClockClass))
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#define CLUTTER_IS_MASTER_CLOCK_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), CLUTTER_TYPE_MASTER_CLOCK))
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#define CLUTTER_MASTER_CLASS_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), CLUTTER_TYPE_MASTER_CLOCK, ClutterMasterClockClass))
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typedef struct _ClutterMasterClockClass ClutterMasterClockClass;
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struct _ClutterMasterClock
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{
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GObject parent_instance;
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GSList *timelines;
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GTimeVal prev_tick;
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gulong msecs_delta;
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gulong tick_id;
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};
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struct _ClutterMasterClockClass
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{
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GObjectClass parent_class;
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};
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static ClutterMasterClock *default_clock = NULL;
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static void on_timeline_start (ClutterTimeline *timeline,
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ClutterMasterClock *master_clock);
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static void on_timeline_completed (ClutterTimeline *timeline,
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ClutterMasterClock *master_clock);
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static void on_timeline_paused (ClutterTimeline *timeline,
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ClutterMasterClock *master_clock);
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G_DEFINE_TYPE (ClutterMasterClock, clutter_master_clock, G_TYPE_OBJECT);
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static void
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timeline_weak_ref (gpointer data,
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GObject *object_pointer)
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{
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ClutterMasterClock *master_clock = data;
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master_clock->timelines = g_slist_remove (master_clock->timelines,
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object_pointer);
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if (master_clock->timelines == NULL)
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{
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if (master_clock->tick_id != 0)
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{
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g_source_remove (master_clock->tick_id);
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master_clock->tick_id = 0;
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}
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master_clock->prev_tick.tv_sec = 0;
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}
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}
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static void
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clutter_master_clock_finalize (GObject *gobject)
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{
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ClutterMasterClock *master_clock = CLUTTER_MASTER_CLOCK (gobject);
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GSList *l;
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if (master_clock->tick_id != 0)
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{
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g_source_remove (master_clock->tick_id);
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master_clock->tick_id = 0;
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}
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for (l = master_clock->timelines; l != NULL; l = l->next)
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{
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ClutterTimeline *timeline = l->data;
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g_object_weak_unref (G_OBJECT (timeline),
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timeline_weak_ref,
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master_clock);
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g_signal_handlers_disconnect_by_func (timeline,
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G_CALLBACK (on_timeline_start),
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master_clock);
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g_signal_handlers_disconnect_by_func (timeline,
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G_CALLBACK (on_timeline_completed),
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master_clock);
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g_signal_handlers_disconnect_by_func (timeline,
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G_CALLBACK (on_timeline_paused),
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master_clock);
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}
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g_slist_free (master_clock->timelines);
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G_OBJECT_CLASS (clutter_master_clock_parent_class)->finalize (gobject);
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}
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static void
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clutter_master_clock_class_init (ClutterMasterClockClass *klass)
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{
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GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
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gobject_class->finalize = clutter_master_clock_finalize;
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}
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static void
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clutter_master_clock_init (ClutterMasterClock *self)
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{
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}
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/*
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* _clutter_master_clock_get_default:
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*
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* Retrieves the default master clock. If this function has never
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* been called before, the default master clock is created.
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*
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* Return value: the default master clock. The returned object is
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* owned by Clutter and should not be modified or freed
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*/
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ClutterMasterClock *
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_clutter_master_clock_get_default (void)
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{
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if (G_LIKELY (default_clock != NULL))
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return default_clock;
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default_clock = g_object_new (CLUTTER_TYPE_MASTER_CLOCK, NULL);
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return default_clock;
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}
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static gboolean
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master_clock_tick (gpointer data)
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{
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ClutterStageManager *stage_manager = clutter_stage_manager_get_default ();
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GSList *stages, *l;
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CLUTTER_NOTE (SCHEDULER, "Master clock [tick]");
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stages = clutter_stage_manager_list_stages (stage_manager);
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for (l = stages; l != NULL; l = l->next)
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clutter_actor_queue_redraw (l->data);
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g_slist_free (stages);
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return TRUE;
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}
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static gboolean
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has_running_timeline (ClutterMasterClock *master_clock)
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{
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GSList *l;
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for (l = master_clock->timelines; l != NULL; l = l->next)
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{
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if (clutter_timeline_is_playing (l->data))
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return TRUE;
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}
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return FALSE;
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}
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static void
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on_timeline_start (ClutterTimeline *timeline,
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ClutterMasterClock *master_clock)
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{
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if (has_running_timeline (master_clock) &&
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master_clock->tick_id == 0)
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{
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master_clock->prev_tick.tv_sec = 0;
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master_clock->tick_id =
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clutter_threads_add_frame_source (clutter_get_default_frame_rate (),
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master_clock_tick,
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master_clock);
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}
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}
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static void
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on_timeline_completed (ClutterTimeline *timeline,
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ClutterMasterClock *master_clock)
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{
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if (!has_running_timeline (master_clock) &&
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master_clock->tick_id != 0)
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{
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master_clock->prev_tick.tv_sec = 0;
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g_source_remove (master_clock->tick_id);
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master_clock->tick_id = 0;
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}
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}
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static void
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on_timeline_paused (ClutterTimeline *timeline,
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ClutterMasterClock *master_clock)
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{
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if (!has_running_timeline (master_clock) &&
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master_clock->tick_id != 0)
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{
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master_clock->prev_tick.tv_sec = 0;
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g_source_remove (master_clock->tick_id);
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master_clock->tick_id = 0;
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}
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}
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/*
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* _clutter_master_clock_add_timeline:
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* @master_clock: a #ClutterMasterClock
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* @timeline: a #ClutterTimeline
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*
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* Adds @timeline to the list of timelines held by the master
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* clock. This function should be called during the instance
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* creation phase of the timeline.
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*/
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void
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_clutter_master_clock_add_timeline (ClutterMasterClock *master_clock,
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ClutterTimeline *timeline)
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{
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gboolean is_first = FALSE;
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if (g_slist_find (master_clock->timelines, timeline))
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return;
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is_first = (master_clock->timelines == NULL) ? TRUE : FALSE;
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master_clock->timelines = g_slist_prepend (master_clock->timelines,
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timeline);
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g_object_weak_ref (G_OBJECT (timeline),
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timeline_weak_ref,
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master_clock);
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g_signal_connect (timeline, "started",
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G_CALLBACK (on_timeline_start),
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master_clock);
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g_signal_connect (timeline, "completed",
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G_CALLBACK (on_timeline_completed),
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master_clock);
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g_signal_connect (timeline, "paused",
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G_CALLBACK (on_timeline_paused),
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master_clock);
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}
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/*
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* _clutter_master_clock_remove_timeline:
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* @master_clock: a #ClutterMasterClock
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* @timeline: a #ClutterTimeline
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*
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* Removes @timeline from the list of timelines held by the
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* master clock. This function should be called during the
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* #ClutterTimeline finalization.
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*/
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void
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_clutter_master_clock_remove_timeline (ClutterMasterClock *master_clock,
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ClutterTimeline *timeline)
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{
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if (!g_slist_find (master_clock->timelines, timeline))
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return;
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master_clock->timelines = g_slist_remove (master_clock->timelines,
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timeline);
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g_object_weak_unref (G_OBJECT (timeline),
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timeline_weak_ref,
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master_clock);
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g_signal_handlers_disconnect_by_func (timeline,
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G_CALLBACK (on_timeline_start),
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master_clock);
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g_signal_handlers_disconnect_by_func (timeline,
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G_CALLBACK (on_timeline_completed),
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master_clock);
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g_signal_handlers_disconnect_by_func (timeline,
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G_CALLBACK (on_timeline_paused),
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master_clock);
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if (master_clock->timelines == NULL)
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{
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if (master_clock->tick_id != 0)
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{
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g_source_remove (master_clock->tick_id);
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master_clock->tick_id = 0;
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}
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master_clock->prev_tick.tv_sec = 0;
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}
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}
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/*
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* _clutter_master_clock_advance:
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* @master_clock: a #ClutterMasterClock
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*
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* Advances all the timelines held by the master clock. This function
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* should be called before calling clutter_redraw() to make sure that
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* all the timelines are advanced and the scene is updated.
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*/
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void
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_clutter_master_clock_advance (ClutterMasterClock *master_clock)
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{
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GTimeVal cur_tick = { 0, };
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gulong msecs;
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GSList *l;
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g_return_if_fail (CLUTTER_IS_MASTER_CLOCK (master_clock));
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g_get_current_time (&cur_tick);
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if (master_clock->prev_tick.tv_sec == 0)
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master_clock->prev_tick = cur_tick;
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msecs = (cur_tick.tv_sec - master_clock->prev_tick.tv_sec) * 1000
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+ (cur_tick.tv_usec - master_clock->prev_tick.tv_usec) / 1000;
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CLUTTER_NOTE (SCHEDULER, "Advancing %d timelines by %lu milliseconds",
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g_slist_length (master_clock->timelines),
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msecs);
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for (l = master_clock->timelines; l != NULL; l = l->next)
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{
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ClutterTimeline *timeline = l->data;
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if (clutter_timeline_is_playing (timeline))
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clutter_timeline_advance_delta (timeline, msecs);
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}
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master_clock->msecs_delta = msecs;
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master_clock->prev_tick = cur_tick;
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}
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