d6ccecd79e
Bug 1561 - Bad code in clutter-alpha.c The implementation of the easing modes equations followed closely the JavaScript and ActionScript counterparts. Obviously, JS and AS are not C-compatible, so later versions of gcc (4.4.0 for instance) would complain about uninitialized variables and such. The code is also obfuscated and hard to debug/understand. For these reasons, the implementation should be unobfuscated and sanitized.
1265 lines
33 KiB
C
1265 lines
33 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 Matthew Allum <mallum@openedhand.com>
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* Jorn Baayen <jorn@openedhand.com>
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* Emmanuele Bassi <ebassi@openedhand.com>
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* Tomas Frydrych <tf@openedhand.com>
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*
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* Copyright (C) 2006, 2007, 2008 OpenedHand
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* Copyright (C) 2009 Intel Corp.
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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, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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/**
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* SECTION:clutter-alpha
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* @short_description: A class for calculating an alpha value as a function
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* of time.
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*
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* #ClutterAlpha is a class for calculating an floating point value
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* dependent only on the position of a #ClutterTimeline.
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*
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* A #ClutterAlpha binds a #ClutterTimeline to a progress function which
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* translates the time T into an adimensional factor alpha. The factor can
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* then be used to drive a #ClutterBehaviour, which will translate the
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* alpha value into something meaningful for a #ClutterActor.
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*
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* You should provide a #ClutterTimeline and bind it to the #ClutterAlpha
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* instance using clutter_alpha_set_timeline(). You should also set an
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* "animation mode", either by using the #ClutterAnimationMode values that
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* Clutter itself provides or by registering custom functions using
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* clutter_alpha_register_func().
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*
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* Instead of a #ClutterAnimationMode you may provide a function returning
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* the alpha value depending on the progress of the timeline, using
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* clutter_alpha_set_func() or clutter_alpha_set_closure(). The alpha
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* function will be executed each time a new frame in the #ClutterTimeline
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* is reached.
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*
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* Since the alpha function is controlled by the timeline instance, you can
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* pause, stop or resume the #ClutterAlpha from calling the alpha function by
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* using the appropriate functions of the #ClutterTimeline object.
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*
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* #ClutterAlpha is used to "drive" a #ClutterBehaviour instance, and it
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* is internally used by the #ClutterAnimation API.
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*
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* <figure id="easing-modes">
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* <title>Easing modes provided by Clutter</title>
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* <graphic fileref="easing-modes.png" format="PNG"/>
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* </figure>
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*
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* Since: 0.2
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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 <math.h>
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#include "clutter-alpha.h"
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#include "clutter-debug.h"
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#include "clutter-enum-types.h"
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#include "clutter-main.h"
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#include "clutter-marshal.h"
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#include "clutter-private.h"
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G_DEFINE_TYPE (ClutterAlpha, clutter_alpha, G_TYPE_INITIALLY_UNOWNED);
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struct _ClutterAlphaPrivate
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{
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ClutterTimeline *timeline;
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guint timeline_new_frame_id;
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gdouble alpha;
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GClosure *closure;
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gulong mode;
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};
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enum
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{
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PROP_0,
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PROP_TIMELINE,
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PROP_ALPHA,
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PROP_MODE
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};
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static void
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timeline_new_frame_cb (ClutterTimeline *timeline,
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guint current_frame_num,
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ClutterAlpha *alpha)
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{
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ClutterAlphaPrivate *priv = alpha->priv;
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/* Update alpha value and notify */
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priv->alpha = clutter_alpha_get_alpha (alpha);
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g_object_notify (G_OBJECT (alpha), "alpha");
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}
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static void
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clutter_alpha_set_property (GObject *object,
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guint prop_id,
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const GValue *value,
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GParamSpec *pspec)
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{
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ClutterAlpha *alpha;
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ClutterAlphaPrivate *priv;
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alpha = CLUTTER_ALPHA (object);
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priv = alpha->priv;
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switch (prop_id)
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{
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case PROP_TIMELINE:
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clutter_alpha_set_timeline (alpha, g_value_get_object (value));
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break;
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case PROP_MODE:
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clutter_alpha_set_mode (alpha, g_value_get_ulong (value));
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static void
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clutter_alpha_get_property (GObject *object,
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guint prop_id,
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GValue *value,
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GParamSpec *pspec)
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{
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ClutterAlpha *alpha;
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ClutterAlphaPrivate *priv;
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alpha = CLUTTER_ALPHA (object);
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priv = alpha->priv;
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switch (prop_id)
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{
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case PROP_TIMELINE:
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g_value_set_object (value, priv->timeline);
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break;
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case PROP_ALPHA:
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g_value_set_double (value, priv->alpha);
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break;
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case PROP_MODE:
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g_value_set_ulong (value, priv->mode);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static void
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clutter_alpha_finalize (GObject *object)
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{
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ClutterAlphaPrivate *priv = CLUTTER_ALPHA (object)->priv;
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if (priv->closure)
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g_closure_unref (priv->closure);
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G_OBJECT_CLASS (clutter_alpha_parent_class)->finalize (object);
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}
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static void
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clutter_alpha_dispose (GObject *object)
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{
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ClutterAlpha *self = CLUTTER_ALPHA(object);
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clutter_alpha_set_timeline (self, NULL);
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G_OBJECT_CLASS (clutter_alpha_parent_class)->dispose (object);
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}
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static void
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clutter_alpha_class_init (ClutterAlphaClass *klass)
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{
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GObjectClass *object_class = G_OBJECT_CLASS (klass);
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GParamSpec *pspec;
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object_class->set_property = clutter_alpha_set_property;
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object_class->get_property = clutter_alpha_get_property;
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object_class->finalize = clutter_alpha_finalize;
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object_class->dispose = clutter_alpha_dispose;
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g_type_class_add_private (klass, sizeof (ClutterAlphaPrivate));
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/**
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* ClutterAlpha:timeline:
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*
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* A #ClutterTimeline instance used to drive the alpha function.
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*
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* Since: 0.2
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*/
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pspec = g_param_spec_object ("timeline",
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"Timeline",
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"Timeline used by the alpha",
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CLUTTER_TYPE_TIMELINE,
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CLUTTER_PARAM_READWRITE);
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g_object_class_install_property (object_class, PROP_TIMELINE, pspec);
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/**
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* ClutterAlpha:alpha:
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*
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* The alpha value as computed by the alpha function. The linear
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* interval is 0.0 to 1.0, but the Alpha allows overshooting by
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* one unit in each direction, so the valid interval is -1.0 to 2.0.
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*
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* Since: 0.2
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*/
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pspec = g_param_spec_double ("alpha",
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"Alpha value",
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"Alpha value",
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-1.0, 2.0,
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0.0,
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CLUTTER_PARAM_READABLE);
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g_object_class_install_property (object_class, PROP_ALPHA, pspec);
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/**
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* ClutterAlpha:mode:
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*
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* The progress function logical id - either a value from the
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* #ClutterAnimationMode enumeration or a value returned by
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* clutter_alpha_register_func().
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*
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* If %CLUTTER_CUSTOM_MODE is used then the function set using
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* clutter_alpha_set_closure() or clutter_alpha_set_func()
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* will be used.
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*
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* Since: 1.0
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*/
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pspec = g_param_spec_ulong ("mode",
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"Mode",
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"Progress mode",
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0, G_MAXULONG,
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CLUTTER_CUSTOM_MODE,
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G_PARAM_CONSTRUCT | CLUTTER_PARAM_READWRITE);
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g_object_class_install_property (object_class, PROP_MODE, pspec);
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}
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static void
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clutter_alpha_init (ClutterAlpha *self)
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{
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self->priv = G_TYPE_INSTANCE_GET_PRIVATE (self,
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CLUTTER_TYPE_ALPHA,
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ClutterAlphaPrivate);
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self->priv->mode = CLUTTER_CUSTOM_MODE;
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self->priv->alpha = 0.0;
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}
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/**
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* clutter_alpha_get_alpha:
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* @alpha: A #ClutterAlpha
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*
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* Query the current alpha value.
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*
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* Return Value: The current alpha value for the alpha
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*
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* Since: 0.2
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*/
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gdouble
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clutter_alpha_get_alpha (ClutterAlpha *alpha)
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{
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ClutterAlphaPrivate *priv;
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gdouble retval = 0;
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g_return_val_if_fail (CLUTTER_IS_ALPHA (alpha), 0);
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priv = alpha->priv;
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if (G_LIKELY (priv->closure))
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{
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GValue params = { 0, };
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GValue result_value = { 0, };
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g_object_ref (alpha);
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g_value_init (&result_value, G_TYPE_DOUBLE);
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g_value_init (¶ms, CLUTTER_TYPE_ALPHA);
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g_value_set_object (¶ms, alpha);
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g_closure_invoke (priv->closure, &result_value, 1, ¶ms, NULL);
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retval = g_value_get_double (&result_value);
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g_value_unset (&result_value);
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g_value_unset (¶ms);
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g_object_unref (alpha);
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}
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return retval;
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}
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/*
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* clutter_alpha_set_closure_internal:
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* @alpha: a #ClutterAlpha
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* @closure: a #GClosure
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*
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* Sets the @closure for @alpha. This function does not
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* set the #ClutterAlpha:mode property and does not emit
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* the #GObject::notify signal for it.
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*/
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static inline void
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clutter_alpha_set_closure_internal (ClutterAlpha *alpha,
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GClosure *closure)
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{
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ClutterAlphaPrivate *priv = alpha->priv;
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if (priv->closure)
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g_closure_unref (priv->closure);
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/* need to take ownership of the closure before sinking it */
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priv->closure = g_closure_ref (closure);
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g_closure_sink (closure);
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/* set the marshaller */
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if (G_CLOSURE_NEEDS_MARSHAL (closure))
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{
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GClosureMarshal marshal = clutter_marshal_DOUBLE__VOID;
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g_closure_set_marshal (closure, marshal);
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}
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}
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/**
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* clutter_alpha_set_closure:
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* @alpha: A #ClutterAlpha
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* @closure: A #GClosure
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*
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* Sets the #GClosure used to compute the alpha value at each
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* frame of the #ClutterTimeline bound to @alpha.
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*
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* Since: 0.8
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*/
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void
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clutter_alpha_set_closure (ClutterAlpha *alpha,
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GClosure *closure)
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{
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ClutterAlphaPrivate *priv;
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g_return_if_fail (CLUTTER_IS_ALPHA (alpha));
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g_return_if_fail (closure != NULL);
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priv = alpha->priv;
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clutter_alpha_set_closure_internal (alpha, closure);
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priv->mode = CLUTTER_CUSTOM_MODE;
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g_object_notify (G_OBJECT (alpha), "mode");
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}
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/**
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* clutter_alpha_set_func:
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* @alpha: A #ClutterAlpha
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* @func: A #ClutterAlphaFunc
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* @data: user data to be passed to the alpha function, or %NULL
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* @destroy: notify function used when disposing the alpha function
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*
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* Sets the #ClutterAlphaFunc function used to compute
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* the alpha value at each frame of the #ClutterTimeline
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* bound to @alpha.
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*
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* This function will not register @func as a global alpha function.
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*
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* Since: 0.2
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*/
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void
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clutter_alpha_set_func (ClutterAlpha *alpha,
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ClutterAlphaFunc func,
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gpointer data,
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GDestroyNotify destroy)
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{
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ClutterAlphaPrivate *priv;
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GClosure *closure;
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g_return_if_fail (CLUTTER_IS_ALPHA (alpha));
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g_return_if_fail (func != NULL);
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priv = alpha->priv;
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closure = g_cclosure_new (G_CALLBACK (func), data, (GClosureNotify) destroy);
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clutter_alpha_set_closure_internal (alpha, closure);
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priv->mode = CLUTTER_CUSTOM_MODE;
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g_object_notify (G_OBJECT (alpha), "mode");
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}
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/**
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* clutter_alpha_set_timeline:
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* @alpha: A #ClutterAlpha
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* @timeline: A #ClutterTimeline
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*
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* Binds @alpha to @timeline.
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*
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* Since: 0.2
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*/
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void
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clutter_alpha_set_timeline (ClutterAlpha *alpha,
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ClutterTimeline *timeline)
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{
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ClutterAlphaPrivate *priv;
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g_return_if_fail (CLUTTER_IS_ALPHA (alpha));
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g_return_if_fail (timeline == NULL || CLUTTER_IS_TIMELINE (timeline));
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priv = alpha->priv;
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if (priv->timeline == timeline)
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return;
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if (priv->timeline)
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{
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g_signal_handlers_disconnect_by_func (priv->timeline,
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timeline_new_frame_cb,
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alpha);
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g_object_unref (priv->timeline);
|
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priv->timeline = NULL;
|
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}
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if (timeline)
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{
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priv->timeline = g_object_ref (timeline);
|
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g_signal_connect (priv->timeline, "new-frame",
|
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G_CALLBACK (timeline_new_frame_cb),
|
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alpha);
|
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}
|
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|
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g_object_notify (G_OBJECT (alpha), "timeline");
|
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}
|
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|
|
/**
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* clutter_alpha_get_timeline:
|
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* @alpha: A #ClutterAlpha
|
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*
|
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* Gets the #ClutterTimeline bound to @alpha.
|
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*
|
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* Return value: (transfer none): a #ClutterTimeline instance
|
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*
|
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* Since: 0.2
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*/
|
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ClutterTimeline *
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clutter_alpha_get_timeline (ClutterAlpha *alpha)
|
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{
|
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g_return_val_if_fail (CLUTTER_IS_ALPHA (alpha), NULL);
|
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|
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return alpha->priv->timeline;
|
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}
|
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|
|
/**
|
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* clutter_alpha_new:
|
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*
|
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* Creates a new #ClutterAlpha instance. You must set a function
|
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* to compute the alpha value using clutter_alpha_set_func() and
|
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* bind a #ClutterTimeline object to the #ClutterAlpha instance
|
|
* using clutter_alpha_set_timeline().
|
|
*
|
|
* You should use the newly created #ClutterAlpha instance inside
|
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* a #ClutterBehaviour object.
|
|
*
|
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* Return value: the newly created empty #ClutterAlpha instance.
|
|
*
|
|
* Since: 0.2
|
|
*/
|
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ClutterAlpha *
|
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clutter_alpha_new (void)
|
|
{
|
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return g_object_new (CLUTTER_TYPE_ALPHA, NULL);
|
|
}
|
|
|
|
/**
|
|
* clutter_alpha_new_full:
|
|
* @timeline: #ClutterTimeline timeline
|
|
* @mode: animation mode
|
|
*
|
|
* Creates a new #ClutterAlpha instance and sets the timeline
|
|
* and animation mode.
|
|
*
|
|
* See also clutter_alpha_set_timeline() and clutter_alpha_set_mode().
|
|
*
|
|
* Return Value: the newly created #ClutterAlpha
|
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*
|
|
* Since: 1.0
|
|
*/
|
|
ClutterAlpha *
|
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clutter_alpha_new_full (ClutterTimeline *timeline,
|
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gulong mode)
|
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{
|
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g_return_val_if_fail (CLUTTER_IS_TIMELINE (timeline), NULL);
|
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g_return_val_if_fail (mode != CLUTTER_ANIMATION_LAST, NULL);
|
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|
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return g_object_new (CLUTTER_TYPE_ALPHA,
|
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"timeline", timeline,
|
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"mode", mode,
|
|
NULL);
|
|
}
|
|
|
|
/**
|
|
* clutter_alpha_new_with_func:
|
|
* @timeline: a #ClutterTimeline
|
|
* @func: a #ClutterAlphaFunc
|
|
* @data: data to pass to the function, or %NULL
|
|
* @destroy: function to call when removing the alpha function, or %NULL
|
|
*
|
|
* Creates a new #ClutterAlpha instances and sets the timeline
|
|
* and the alpha function.
|
|
*
|
|
* This function will not register @func as a global alpha function.
|
|
*
|
|
* See also clutter_alpha_set_timeline() and clutter_alpha_set_func().
|
|
*
|
|
* Return value: the newly created #ClutterAlpha
|
|
*
|
|
* Since: 1.0
|
|
*/
|
|
ClutterAlpha *
|
|
clutter_alpha_new_with_func (ClutterTimeline *timeline,
|
|
ClutterAlphaFunc func,
|
|
gpointer data,
|
|
GDestroyNotify destroy)
|
|
{
|
|
ClutterAlpha *retval;
|
|
|
|
g_return_val_if_fail (CLUTTER_IS_TIMELINE (timeline), NULL);
|
|
g_return_val_if_fail (func != NULL, NULL);
|
|
|
|
retval = clutter_alpha_new ();
|
|
clutter_alpha_set_timeline (retval, timeline);
|
|
clutter_alpha_set_func (retval, func, data, destroy);
|
|
|
|
return retval;
|
|
}
|
|
|
|
/**
|
|
* clutter_alpha_get_mode:
|
|
* @alpha: a #ClutterAlpha
|
|
*
|
|
* Retrieves the #ClutterAnimationMode used by @alpha.
|
|
*
|
|
* Return value: the animation mode
|
|
*
|
|
* Since: 1.0
|
|
*/
|
|
gulong
|
|
clutter_alpha_get_mode (ClutterAlpha *alpha)
|
|
{
|
|
g_return_val_if_fail (CLUTTER_IS_ALPHA (alpha), CLUTTER_CUSTOM_MODE);
|
|
|
|
return alpha->priv->mode;
|
|
}
|
|
|
|
static gdouble
|
|
clutter_linear (ClutterAlpha *alpha,
|
|
gpointer dummy G_GNUC_UNUSED)
|
|
{
|
|
ClutterTimeline *timeline = alpha->priv->timeline;
|
|
|
|
return clutter_timeline_get_progress (timeline);
|
|
}
|
|
|
|
static gdouble
|
|
clutter_ease_in_quad (ClutterAlpha *alpha,
|
|
gpointer dummy G_GNUC_UNUSED)
|
|
{
|
|
ClutterTimeline *timeline = alpha->priv->timeline;
|
|
gdouble progress = clutter_timeline_get_progress (timeline);
|
|
|
|
return progress * progress;
|
|
}
|
|
|
|
static gdouble
|
|
clutter_ease_out_quad (ClutterAlpha *alpha,
|
|
gpointer dummy G_GNUC_UNUSED)
|
|
{
|
|
ClutterTimeline *timeline = alpha->priv->timeline;
|
|
gdouble t = clutter_timeline_get_current_frame (timeline);
|
|
gdouble d = clutter_timeline_get_n_frames (timeline);
|
|
gdouble p = t / d;
|
|
|
|
return -1.0 * p * (p - 2);
|
|
}
|
|
|
|
static gdouble
|
|
clutter_ease_in_out_quad (ClutterAlpha *alpha,
|
|
gpointer dummy G_GNUC_UNUSED)
|
|
{
|
|
ClutterTimeline *timeline = alpha->priv->timeline;
|
|
gdouble t = clutter_timeline_get_current_frame (timeline);
|
|
gdouble d = clutter_timeline_get_n_frames (timeline);
|
|
gdouble p = t / (d / 2);
|
|
|
|
if (p < 1)
|
|
return 0.5 * p * p;
|
|
|
|
p -= 1;
|
|
|
|
return -0.5 * (p * (p - 2) - 1);
|
|
}
|
|
|
|
static gdouble
|
|
clutter_ease_in_cubic (ClutterAlpha *alpha,
|
|
gpointer dummy G_GNUC_UNUSED)
|
|
{
|
|
ClutterTimeline *timeline = alpha->priv->timeline;
|
|
gdouble t = clutter_timeline_get_current_frame (timeline);
|
|
gdouble d = clutter_timeline_get_n_frames (timeline);
|
|
gdouble p = t / d;
|
|
|
|
return p * p * p;
|
|
}
|
|
|
|
static gdouble
|
|
clutter_ease_out_cubic (ClutterAlpha *alpha,
|
|
gpointer dummy G_GNUC_UNUSED)
|
|
{
|
|
ClutterTimeline *timeline = alpha->priv->timeline;
|
|
gdouble t = clutter_timeline_get_current_frame (timeline);
|
|
gdouble d = clutter_timeline_get_n_frames (timeline);
|
|
gdouble p = t / d - 1;
|
|
|
|
return p * p * p + 1;
|
|
}
|
|
|
|
static gdouble
|
|
clutter_ease_in_out_cubic (ClutterAlpha *alpha,
|
|
gpointer dummy G_GNUC_UNUSED)
|
|
{
|
|
ClutterTimeline *timeline = alpha->priv->timeline;
|
|
gdouble t = clutter_timeline_get_current_frame (timeline);
|
|
gdouble d = clutter_timeline_get_n_frames (timeline);
|
|
gdouble p = t / (d / 2);
|
|
|
|
if (p < 1)
|
|
return 0.5 * p * p * p;
|
|
|
|
p -= 2;
|
|
|
|
return 0.5 * (p * p * p + 2);
|
|
}
|
|
|
|
static gdouble
|
|
clutter_ease_in_quart (ClutterAlpha *alpha,
|
|
gpointer dummy G_GNUC_UNUSED)
|
|
{
|
|
ClutterTimeline *timeline = alpha->priv->timeline;
|
|
gdouble t = clutter_timeline_get_current_frame (timeline);
|
|
gdouble d = clutter_timeline_get_n_frames (timeline);
|
|
gdouble p = t / d;
|
|
|
|
return p * p * p * p;
|
|
}
|
|
|
|
static gdouble
|
|
clutter_ease_out_quart (ClutterAlpha *alpha,
|
|
gpointer dummy G_GNUC_UNUSED)
|
|
{
|
|
ClutterTimeline *timeline = alpha->priv->timeline;
|
|
gdouble t = clutter_timeline_get_current_frame (timeline);
|
|
gdouble d = clutter_timeline_get_n_frames (timeline);
|
|
gdouble p = t / d - 1;
|
|
|
|
return -1.0 * (p * p * p * p - 1);
|
|
}
|
|
|
|
static gdouble
|
|
clutter_ease_in_out_quart (ClutterAlpha *alpha,
|
|
gpointer dummy G_GNUC_UNUSED)
|
|
{
|
|
ClutterTimeline *timeline = alpha->priv->timeline;
|
|
gdouble t = clutter_timeline_get_current_frame (timeline);
|
|
gdouble d = clutter_timeline_get_n_frames (timeline);
|
|
gdouble p = t / (d / 2);
|
|
|
|
if (p < 1)
|
|
return 0.5 * p * p * p * p;
|
|
|
|
p -= 2;
|
|
|
|
return -0.5 * (p * p * p * p - 2);
|
|
}
|
|
|
|
static gdouble
|
|
clutter_ease_in_quint (ClutterAlpha *alpha,
|
|
gpointer dummy G_GNUC_UNUSED)
|
|
{
|
|
ClutterTimeline *timeline = alpha->priv->timeline;
|
|
gdouble t = clutter_timeline_get_current_frame (timeline);
|
|
gdouble d = clutter_timeline_get_n_frames (timeline);
|
|
gdouble p = t / d;
|
|
|
|
return p * p * p * p * p;
|
|
}
|
|
|
|
static gdouble
|
|
clutter_ease_out_quint (ClutterAlpha *alpha,
|
|
gpointer dummy G_GNUC_UNUSED)
|
|
{
|
|
ClutterTimeline *timeline = alpha->priv->timeline;
|
|
gdouble t = clutter_timeline_get_current_frame (timeline);
|
|
gdouble d = clutter_timeline_get_n_frames (timeline);
|
|
gdouble p = t / d - 1;
|
|
|
|
return p * p * p * p * p + 1;
|
|
}
|
|
|
|
static gdouble
|
|
clutter_ease_in_out_quint (ClutterAlpha *alpha,
|
|
gpointer dummy G_GNUC_UNUSED)
|
|
{
|
|
ClutterTimeline *timeline = alpha->priv->timeline;
|
|
gdouble t = clutter_timeline_get_current_frame (timeline);
|
|
gdouble d = clutter_timeline_get_n_frames (timeline);
|
|
gdouble p = t / (d / 2);
|
|
|
|
if (p < 1)
|
|
return 0.5 * p * p * p * p * p;
|
|
|
|
p -= 2;
|
|
|
|
return 0.5 * (p * p * p * p * p + 2);
|
|
}
|
|
|
|
static gdouble
|
|
clutter_ease_in_sine (ClutterAlpha *alpha,
|
|
gpointer dummy G_GNUC_UNUSED)
|
|
{
|
|
ClutterTimeline *timeline = alpha->priv->timeline;
|
|
gdouble t = clutter_timeline_get_current_frame (timeline);
|
|
gdouble d = clutter_timeline_get_n_frames (timeline);
|
|
|
|
return -1.0 * cos (t / d * G_PI_2) + 1.0;
|
|
}
|
|
|
|
static gdouble
|
|
clutter_ease_out_sine (ClutterAlpha *alpha,
|
|
gpointer dummy G_GNUC_UNUSED)
|
|
{
|
|
ClutterTimeline *timeline = alpha->priv->timeline;
|
|
gdouble t = clutter_timeline_get_current_frame (timeline);
|
|
gdouble d = clutter_timeline_get_n_frames (timeline);
|
|
|
|
return sin (t / d * G_PI_2);
|
|
}
|
|
|
|
static gdouble
|
|
clutter_ease_in_out_sine (ClutterAlpha *alpha,
|
|
gpointer dummy G_GNUC_UNUSED)
|
|
{
|
|
ClutterTimeline *timeline = alpha->priv->timeline;
|
|
gdouble t = clutter_timeline_get_current_frame (timeline);
|
|
gdouble d = clutter_timeline_get_n_frames (timeline);
|
|
|
|
return -0.5 * (cos (G_PI * t / d) - 1);
|
|
}
|
|
|
|
static gdouble
|
|
clutter_ease_in_expo (ClutterAlpha *alpha,
|
|
gpointer dummy G_GNUC_UNUSED)
|
|
{
|
|
ClutterTimeline *timeline = alpha->priv->timeline;
|
|
gdouble t = clutter_timeline_get_current_frame (timeline);
|
|
gdouble d = clutter_timeline_get_n_frames (timeline);
|
|
|
|
return (t == 0) ? 0.0 : pow (2, 10 * (t / d - 1));
|
|
}
|
|
|
|
static gdouble
|
|
clutter_ease_out_expo (ClutterAlpha *alpha,
|
|
gpointer dummy G_GNUC_UNUSED)
|
|
{
|
|
ClutterTimeline *timeline = alpha->priv->timeline;
|
|
gdouble t = clutter_timeline_get_current_frame (timeline);
|
|
gdouble d = clutter_timeline_get_n_frames (timeline);
|
|
|
|
return (t == d) ? 1.0 : -pow (2, -10 * t / d) + 1;
|
|
}
|
|
|
|
static gdouble
|
|
clutter_ease_in_out_expo (ClutterAlpha *alpha,
|
|
gpointer dummy G_GNUC_UNUSED)
|
|
{
|
|
ClutterTimeline *timeline = alpha->priv->timeline;
|
|
gdouble t = clutter_timeline_get_current_frame (timeline);
|
|
gdouble d = clutter_timeline_get_n_frames (timeline);
|
|
gdouble p;
|
|
|
|
if (t == 0)
|
|
return 0.0;
|
|
|
|
if (t == d)
|
|
return 1.0;
|
|
|
|
p = t / (d / 2);
|
|
|
|
if (p < 1)
|
|
return 0.5 * pow (2, 10 * (p - 1));
|
|
|
|
p -= 1;
|
|
|
|
return 0.5 * (-pow (2, -10 * p) + 2);
|
|
}
|
|
|
|
static gdouble
|
|
clutter_ease_in_circ (ClutterAlpha *alpha,
|
|
gpointer dummy G_GNUC_UNUSED)
|
|
{
|
|
ClutterTimeline *timeline = alpha->priv->timeline;
|
|
gdouble t = clutter_timeline_get_current_frame (timeline);
|
|
gdouble d = clutter_timeline_get_n_frames (timeline);
|
|
gdouble p = t / d;
|
|
|
|
return -1.0 * (sqrt (1 - p * p) - 1);
|
|
}
|
|
|
|
static gdouble
|
|
clutter_ease_out_circ (ClutterAlpha *alpha,
|
|
gpointer dummy G_GNUC_UNUSED)
|
|
{
|
|
ClutterTimeline *timeline = alpha->priv->timeline;
|
|
gdouble t = clutter_timeline_get_current_frame (timeline);
|
|
gdouble d = clutter_timeline_get_n_frames (timeline);
|
|
gdouble p = t / d - 1;
|
|
|
|
return sqrt (1 - p * p);
|
|
}
|
|
|
|
static gdouble
|
|
clutter_ease_in_out_circ (ClutterAlpha *alpha,
|
|
gpointer dummy G_GNUC_UNUSED)
|
|
{
|
|
ClutterTimeline *timeline = alpha->priv->timeline;
|
|
gdouble t = clutter_timeline_get_current_frame (timeline);
|
|
gdouble d = clutter_timeline_get_n_frames (timeline);
|
|
gdouble p = t / (d / 2);
|
|
|
|
if (p < 1)
|
|
return -0.5 * (sqrt (1 - p * p) - 1);
|
|
|
|
p -= 2;
|
|
|
|
return 0.5 * (sqrt (1 - p * p) + 1);
|
|
}
|
|
|
|
static gdouble
|
|
clutter_ease_in_elastic (ClutterAlpha *alpha,
|
|
gpointer dummy G_GNUC_UNUSED)
|
|
{
|
|
ClutterTimeline *timeline = alpha->priv->timeline;
|
|
gdouble t = clutter_timeline_get_current_frame (timeline);
|
|
gdouble d = clutter_timeline_get_n_frames (timeline);
|
|
gdouble p = d * .3;
|
|
gdouble s = p / 4;
|
|
gdouble q = t / d;
|
|
|
|
if (q == 1)
|
|
return 1.0;
|
|
|
|
q -= 1;
|
|
|
|
return -(pow (2, 10 * q) * sin ((q * d - s) * (2 * G_PI) / p));
|
|
}
|
|
|
|
static gdouble
|
|
clutter_ease_out_elastic (ClutterAlpha *alpha,
|
|
gpointer dummy G_GNUC_UNUSED)
|
|
{
|
|
ClutterTimeline *timeline = alpha->priv->timeline;
|
|
gdouble t = clutter_timeline_get_current_frame (timeline);
|
|
gdouble d = clutter_timeline_get_n_frames (timeline);
|
|
gdouble p = d * .3;
|
|
gdouble s = p / 4;
|
|
gdouble q = t / d;
|
|
|
|
if (q == 1)
|
|
return 1.0;
|
|
|
|
return pow (2, -10 * q) * sin ((q * d - s) * (2 * G_PI) / p) + 1.0;
|
|
}
|
|
|
|
static gdouble
|
|
clutter_ease_in_out_elastic (ClutterAlpha *alpha,
|
|
gpointer dummy G_GNUC_UNUSED)
|
|
{
|
|
ClutterTimeline *timeline = alpha->priv->timeline;
|
|
gdouble t = clutter_timeline_get_current_frame (timeline);
|
|
gdouble d = clutter_timeline_get_n_frames (timeline);
|
|
gdouble p = d * (.3 * 1.5);
|
|
gdouble s = p / 4;
|
|
gdouble q = t / (d / 2);
|
|
|
|
if (q == 2)
|
|
return 1.0;
|
|
|
|
if (q < 1)
|
|
{
|
|
q -= 1;
|
|
|
|
return -.5 * (pow (2, 10 * q) * sin ((q * d - s) * (2 * G_PI) / p));
|
|
}
|
|
else
|
|
{
|
|
q -= 1;
|
|
|
|
return pow (2, -10 * q)
|
|
* sin ((q * d - s) * (2 * G_PI) / p)
|
|
* .5 + 1.0;
|
|
}
|
|
}
|
|
|
|
static gdouble
|
|
clutter_ease_in_back (ClutterAlpha *alpha,
|
|
gpointer dummy G_GNUC_UNUSED)
|
|
{
|
|
ClutterTimeline *timeline = alpha->priv->timeline;
|
|
gdouble t = clutter_timeline_get_current_frame (timeline);
|
|
gdouble d = clutter_timeline_get_n_frames (timeline);
|
|
gdouble p = t / d;
|
|
|
|
return p * p * ((1.70158 + 1) * p - 1.70158);
|
|
}
|
|
|
|
static gdouble
|
|
clutter_ease_out_back (ClutterAlpha *alpha,
|
|
gpointer dummy G_GNUC_UNUSED)
|
|
{
|
|
ClutterTimeline *timeline = alpha->priv->timeline;
|
|
gdouble t = clutter_timeline_get_current_frame (timeline);
|
|
gdouble d = clutter_timeline_get_n_frames (timeline);
|
|
gdouble p = t / d - 1;
|
|
|
|
return p * p * ((1.70158 + 1) * p + 1.70158) + 1;
|
|
}
|
|
|
|
static gdouble
|
|
clutter_ease_in_out_back (ClutterAlpha *alpha,
|
|
gpointer dummy G_GNUC_UNUSED)
|
|
{
|
|
ClutterTimeline *timeline = alpha->priv->timeline;
|
|
gdouble t = clutter_timeline_get_current_frame (timeline);
|
|
gdouble d = clutter_timeline_get_n_frames (timeline);
|
|
gdouble p = t / (d / 2);
|
|
gdouble s = 1.70158 * 1.525;
|
|
|
|
if (p < 1)
|
|
return 0.5 * (p * p * ((s + 1) * p - s));
|
|
|
|
p -= 2;
|
|
|
|
return 0.5 * (p * p * ((s + 1) * p + s) + 2);
|
|
}
|
|
|
|
static gdouble
|
|
ease_out_bounce_internal (gdouble t,
|
|
gdouble d)
|
|
{
|
|
gdouble p = t / d;
|
|
|
|
if (p < (1 / 2.75))
|
|
return 7.5625 * p * p;
|
|
else if (p < (2 / 2.75))
|
|
{
|
|
p -= (1.5 / 2.75);
|
|
|
|
return 7.5625 * p * p + .75;
|
|
}
|
|
else if (p < (2.5 / 2.75))
|
|
{
|
|
p -= (2.25 / 2.75);
|
|
|
|
return 7.5625 * p * p + .9375;
|
|
}
|
|
else
|
|
{
|
|
p -= (2.625 / 2.75);
|
|
|
|
return 7.5625 * p * p + .984375;
|
|
}
|
|
}
|
|
|
|
static gdouble
|
|
ease_in_bounce_internal (gdouble t,
|
|
gdouble d)
|
|
{
|
|
return 1.0 - ease_out_bounce_internal (d - t, d);
|
|
}
|
|
|
|
static gdouble
|
|
clutter_ease_in_bounce (ClutterAlpha *alpha,
|
|
gpointer dummy G_GNUC_UNUSED)
|
|
{
|
|
ClutterTimeline *timeline = alpha->priv->timeline;
|
|
gdouble t = clutter_timeline_get_current_frame (timeline);
|
|
gdouble d = clutter_timeline_get_n_frames (timeline);
|
|
|
|
return ease_in_bounce_internal (t, d);
|
|
}
|
|
|
|
static gdouble
|
|
clutter_ease_out_bounce (ClutterAlpha *alpha,
|
|
gpointer dummy G_GNUC_UNUSED)
|
|
{
|
|
ClutterTimeline *timeline = alpha->priv->timeline;
|
|
gdouble t = clutter_timeline_get_current_frame (timeline);
|
|
gdouble d = clutter_timeline_get_n_frames (timeline);
|
|
|
|
return ease_out_bounce_internal (t, d);
|
|
}
|
|
|
|
static gdouble
|
|
clutter_ease_in_out_bounce (ClutterAlpha *alpha,
|
|
gpointer dummy G_GNUC_UNUSED)
|
|
{
|
|
ClutterTimeline *timeline = alpha->priv->timeline;
|
|
gdouble t = clutter_timeline_get_current_frame (timeline);
|
|
gdouble d = clutter_timeline_get_n_frames (timeline);
|
|
|
|
if (t < d / 2)
|
|
return ease_in_bounce_internal (t * 2, d) * 0.5;
|
|
else
|
|
return ease_out_bounce_internal (t * 2 - d, d) * 0.5 + 1.0 * 0.5;
|
|
}
|
|
|
|
/* static enum/function mapping table for the animation modes
|
|
* we provide internally
|
|
*
|
|
* XXX - keep in sync with ClutterAnimationMode
|
|
*/
|
|
static const struct {
|
|
gulong mode;
|
|
ClutterAlphaFunc func;
|
|
} animation_modes[] = {
|
|
{ CLUTTER_CUSTOM_MODE, NULL },
|
|
|
|
{ CLUTTER_LINEAR, clutter_linear },
|
|
{ CLUTTER_EASE_IN_QUAD, clutter_ease_in_quad },
|
|
{ CLUTTER_EASE_OUT_QUAD, clutter_ease_out_quad },
|
|
{ CLUTTER_EASE_IN_OUT_QUAD, clutter_ease_in_out_quad },
|
|
{ CLUTTER_EASE_IN_CUBIC, clutter_ease_in_cubic },
|
|
{ CLUTTER_EASE_OUT_CUBIC, clutter_ease_out_cubic },
|
|
{ CLUTTER_EASE_IN_OUT_CUBIC, clutter_ease_in_out_cubic },
|
|
{ CLUTTER_EASE_IN_QUART, clutter_ease_in_quart },
|
|
{ CLUTTER_EASE_OUT_QUART, clutter_ease_out_quart },
|
|
{ CLUTTER_EASE_IN_OUT_QUART, clutter_ease_in_out_quart },
|
|
{ CLUTTER_EASE_IN_QUINT, clutter_ease_in_quint },
|
|
{ CLUTTER_EASE_OUT_QUINT, clutter_ease_out_quint },
|
|
{ CLUTTER_EASE_IN_OUT_QUINT, clutter_ease_in_out_quint },
|
|
{ CLUTTER_EASE_IN_SINE, clutter_ease_in_sine },
|
|
{ CLUTTER_EASE_OUT_SINE, clutter_ease_out_sine },
|
|
{ CLUTTER_EASE_IN_OUT_SINE, clutter_ease_in_out_sine },
|
|
{ CLUTTER_EASE_IN_EXPO, clutter_ease_in_expo },
|
|
{ CLUTTER_EASE_OUT_EXPO, clutter_ease_out_expo },
|
|
{ CLUTTER_EASE_IN_OUT_EXPO, clutter_ease_in_out_expo },
|
|
{ CLUTTER_EASE_IN_CIRC, clutter_ease_in_circ },
|
|
{ CLUTTER_EASE_OUT_CIRC, clutter_ease_out_circ },
|
|
{ CLUTTER_EASE_IN_OUT_CIRC, clutter_ease_in_out_circ },
|
|
{ CLUTTER_EASE_IN_ELASTIC, clutter_ease_in_elastic },
|
|
{ CLUTTER_EASE_OUT_ELASTIC, clutter_ease_out_elastic },
|
|
{ CLUTTER_EASE_IN_OUT_ELASTIC, clutter_ease_in_out_elastic },
|
|
{ CLUTTER_EASE_IN_BACK, clutter_ease_in_back },
|
|
{ CLUTTER_EASE_OUT_BACK, clutter_ease_out_back },
|
|
{ CLUTTER_EASE_IN_OUT_BACK, clutter_ease_in_out_back },
|
|
{ CLUTTER_EASE_IN_BOUNCE, clutter_ease_in_bounce },
|
|
{ CLUTTER_EASE_OUT_BOUNCE, clutter_ease_out_bounce },
|
|
{ CLUTTER_EASE_IN_OUT_BOUNCE, clutter_ease_in_out_bounce },
|
|
|
|
{ CLUTTER_ANIMATION_LAST, NULL },
|
|
};
|
|
|
|
typedef struct _AlphaData {
|
|
guint closure_set : 1;
|
|
|
|
ClutterAlphaFunc func;
|
|
gpointer data;
|
|
|
|
GClosure *closure;
|
|
} AlphaData;
|
|
|
|
static GPtrArray *clutter_alphas = NULL;
|
|
|
|
/**
|
|
* clutter_alpha_set_mode:
|
|
* @alpha: a #ClutterAlpha
|
|
* @mode: a #ClutterAnimationMode
|
|
*
|
|
* Sets the progress function of @alpha using the symbolic value
|
|
* of @mode, as taken by the #ClutterAnimationMode enumeration or
|
|
* using the value returned by clutter_alpha_register_func().
|
|
*
|
|
* Since: 1.0
|
|
*/
|
|
void
|
|
clutter_alpha_set_mode (ClutterAlpha *alpha,
|
|
gulong mode)
|
|
{
|
|
ClutterAlphaPrivate *priv;
|
|
|
|
g_return_if_fail (CLUTTER_IS_ALPHA (alpha));
|
|
g_return_if_fail (mode != CLUTTER_ANIMATION_LAST);
|
|
|
|
priv = alpha->priv;
|
|
|
|
if (mode == CLUTTER_CUSTOM_MODE)
|
|
{
|
|
priv->mode = mode;
|
|
}
|
|
else if (mode < CLUTTER_ANIMATION_LAST)
|
|
{
|
|
GClosure *closure;
|
|
|
|
/* sanity check to avoid getting an out of sync
|
|
* enum/function mapping
|
|
*/
|
|
g_assert (animation_modes[mode].mode == mode);
|
|
g_assert (animation_modes[mode].func != NULL);
|
|
|
|
closure = g_cclosure_new (G_CALLBACK (animation_modes[mode].func),
|
|
NULL,
|
|
NULL);
|
|
clutter_alpha_set_closure_internal (alpha, closure);
|
|
|
|
priv->mode = mode;
|
|
}
|
|
else if (mode > CLUTTER_ANIMATION_LAST)
|
|
{
|
|
AlphaData *alpha_data = NULL;
|
|
gulong real_index = 0;
|
|
|
|
if (G_UNLIKELY (clutter_alphas == NULL))
|
|
{
|
|
g_warning ("No alpha functions defined for ClutterAlpha to use. "
|
|
"Use clutter_alpha_register_func() to register an "
|
|
"alpha function.");
|
|
return;
|
|
}
|
|
|
|
real_index = mode - CLUTTER_ANIMATION_LAST - 1;
|
|
|
|
alpha_data = g_ptr_array_index (clutter_alphas, real_index);
|
|
if (G_UNLIKELY (alpha_data == NULL))
|
|
{
|
|
g_warning ("No alpha function registered for mode %lu.",
|
|
mode);
|
|
return;
|
|
}
|
|
|
|
if (alpha_data->closure_set)
|
|
clutter_alpha_set_closure (alpha, alpha_data->closure);
|
|
else
|
|
{
|
|
GClosure *closure;
|
|
|
|
closure = g_cclosure_new (G_CALLBACK (alpha_data->func),
|
|
alpha_data->data,
|
|
NULL);
|
|
clutter_alpha_set_closure_internal (alpha, closure);
|
|
}
|
|
|
|
priv->mode = mode;
|
|
}
|
|
else
|
|
g_assert_not_reached ();
|
|
|
|
g_object_notify (G_OBJECT (alpha), "mode");
|
|
}
|
|
|
|
static gulong
|
|
register_alpha_internal (AlphaData *alpha_data)
|
|
{
|
|
if (G_UNLIKELY (clutter_alphas == NULL))
|
|
clutter_alphas = g_ptr_array_new ();
|
|
|
|
g_ptr_array_add (clutter_alphas, alpha_data);
|
|
|
|
return clutter_alphas->len + CLUTTER_ANIMATION_LAST;
|
|
}
|
|
|
|
/**
|
|
* clutter_alpha_register_func:
|
|
* @func: a #ClutterAlphaFunc
|
|
* @data: user data to pass to @func, or %NULL
|
|
*
|
|
* Registers a global alpha function and returns its logical id
|
|
* to be used by clutter_alpha_set_mode() or by #ClutterAnimation.
|
|
*
|
|
* The logical id is always greater than %CLUTTER_ANIMATION_LAST.
|
|
*
|
|
* Return value: the logical id of the alpha function
|
|
*
|
|
* Since: 1.0
|
|
*/
|
|
gulong
|
|
clutter_alpha_register_func (ClutterAlphaFunc func,
|
|
gpointer data)
|
|
{
|
|
AlphaData *alpha_data;
|
|
|
|
g_return_val_if_fail (func != NULL, 0);
|
|
|
|
alpha_data = g_slice_new (AlphaData);
|
|
alpha_data->closure_set = FALSE;
|
|
alpha_data->func = func;
|
|
alpha_data->data = data;
|
|
|
|
return register_alpha_internal (alpha_data);
|
|
}
|
|
|
|
/**
|
|
* clutter_alpha_register_closure:
|
|
* @closure: a #GClosure
|
|
*
|
|
* #GClosure variant of clutter_alpha_register_func().
|
|
*
|
|
* Registers a global alpha function and returns its logical id
|
|
* to be used by clutter_alpha_set_mode() or by #ClutterAnimation.
|
|
*
|
|
* The logical id is always greater than %CLUTTER_ANIMATION_LAST.
|
|
*
|
|
* Return value: the logical id of the alpha function
|
|
*
|
|
* Since: 1.0
|
|
*/
|
|
gulong
|
|
clutter_alpha_register_closure (GClosure *closure)
|
|
{
|
|
AlphaData *alpha_data;
|
|
|
|
g_return_val_if_fail (closure != NULL, 0);
|
|
|
|
alpha_data = g_slice_new (AlphaData);
|
|
alpha_data->closure_set = TRUE;
|
|
alpha_data->closure = closure;
|
|
|
|
return register_alpha_internal (alpha_data);
|
|
}
|