mutter/clutter/clutter-timeout-pool.h
Neil Roberts a93a93d007 Count timeline frames using the FPS instead of an integer interval
Bug 1495 - Timelines run 4% short

Previously the timelines were timed by calculating the interval
between each frame stored as an integer number of milliseconds so some
precision is lost. For example, requesting 60 frames per second gets
converted to 16 ms per frame which is actually 62.5 frames per
second. This makes the timeline shorter by 4%.

This patch merges the common code for timing from the timeout pools
and frame sources into an internal clutter-timeout-interval file. This
stores the interval directly as the FPS and counts the number of
frames that have been reached instead of the elapsed time.
2009-03-16 15:40:18 +00:00

56 lines
2.0 KiB
C

/*
* Clutter.
*
* An OpenGL based 'interactive canvas' library.
*
* Authored By Matthew Allum <mallum@openedhand.com>
*
* Copyright (C) 2006 OpenedHand
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*
* ClutterTimeoutPool: pool of timeout functions using the same slice of
* the GLib main loop
*
* Author: Emmanuele Bassi <ebassi@openedhand.com>
*
* Based on similar code by Tristan van Berkom
*/
#if !defined(__CLUTTER_H_INSIDE__) && !defined(CLUTTER_COMPILATION)
#error "Only <clutter/clutter.h> can be included directly."
#endif
#ifndef __CLUTTER_TIMEOUT_POOL_H__
#define __CLUTTER_TIMEOUT_POOL_H__
#include <glib.h>
G_BEGIN_DECLS
typedef struct _ClutterTimeoutPool ClutterTimeoutPool;
ClutterTimeoutPool *clutter_timeout_pool_new (gint priority);
guint clutter_timeout_pool_add (ClutterTimeoutPool *pool,
guint fps,
GSourceFunc func,
gpointer data,
GDestroyNotify notify);
void clutter_timeout_pool_remove (ClutterTimeoutPool *pool,
guint id);
G_END_DECLS
#endif /* __CLUTTER_TIMEOUT_POOL_H__ */