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2006-08-28 Jorn Baayen <jorn@openedhand.com>

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* clutter/Makefile.am:
	* clutter/clutter-alpha.c:
	* clutter/clutter-alpha.h:
	* clutter/clutter-behaviours.c:
	(clutter_behaviour_opacity_dispose),
	(clutter_behaviour_opacity_init),
	(clutter_behaviour_opacity_frame_foreach),
	(clutter_behaviour_opacity_frame):
	* clutter/clutter-behaviours.h:
	* clutter/clutter-timeline.c: (clutter_timeline_class_init):
	* clutter/clutter-timeline.h:
	* clutter/clutter.h:
	* examples/behave.c: (main):

	Separate alpha calculation into its own class.

	* clutter/clutter-behaviour.c: (clutter_behaviour_set_timelime):

	Correct NULL check.
This commit is contained in:
Jorn Baayen 2006-08-28 17:11:15 +00:00
parent 149a4bac0c
commit bc3d914ccd
11 changed files with 522 additions and 136 deletions
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22
ChangeLog
View File

@ -1,3 +1,25 @@
2006-08-28 Jorn Baayen <jorn@openedhand.com>
* clutter/Makefile.am:
* clutter/clutter-alpha.c:
* clutter/clutter-alpha.h:
* clutter/clutter-behaviours.c:
(clutter_behaviour_opacity_dispose),
(clutter_behaviour_opacity_init),
(clutter_behaviour_opacity_frame_foreach),
(clutter_behaviour_opacity_frame):
* clutter/clutter-behaviours.h:
* clutter/clutter-timeline.c: (clutter_timeline_class_init):
* clutter/clutter-timeline.h:
* clutter/clutter.h:
* examples/behave.c: (main):
Separate alpha calculation into its own class.
* clutter/clutter-behaviour.c: (clutter_behaviour_set_timelime):
Correct NULL check.
2006-08-15 Matthew Allum <mallum@openedhand.com>
* clutter/clutter-behaviour.h:

2
clutter/Makefile.am
View File

@ -23,6 +23,7 @@ source_h = \
$(srcdir)/clutter-label.h \
$(srcdir)/clutter-behaviour.h \
$(srcdir)/clutter-behaviours.h \
$(srcdir)/clutter-alpha.h \
$(srcdir)/clutter-main.h
clutter-marshal.h: clutter-marshal.list
@ -87,6 +88,7 @@ source_c = clutter-main.c \
clutter-actor.c \
clutter-behaviour.c \
clutter-behaviours.c \
clutter-alpha.c \
clutter-enum-types.c
source_h_priv = clutter-private.h

339
clutter/clutter-alpha.c Normal file
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@ -0,0 +1,339 @@
/*
* Clutter.
*
* An OpenGL based 'interactive canvas' library.
*
* Authored By Matthew Allum <mallum@openedhand.com>
* Jorn Baayen <jorn@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, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/**
* SECTION:clutter-alpha
* @short_description: A class for calculating an alpha value as a function
* of time.
*
* #ClutterAlpha is a class for calculating an alpha value as a function
* of time.
*/
#include "clutter-alpha.h"
#include "clutter-main.h"
#include "clutter-marshal.h"
G_DEFINE_TYPE (ClutterAlpha, clutter_alpha, G_TYPE_OBJECT);
struct ClutterAlphaPrivate
{
ClutterTimeline *timeline;
guint timeline_new_frame_id;
guint32 alpha;
ClutterAlphaFunc func;
};
enum
{
PROP_0,
PROP_TIMELINE,
PROP_FUNC,
PROP_ALPHA
};
/* Alpha funcs */
guint32
clutter_alpha_ramp_inc_func (ClutterAlpha *alpha)
{
int current_frame_num, nframes;
current_frame_num =
clutter_timeline_get_current_frame (alpha->priv->timeline);
nframes =
clutter_timeline_get_n_frames (alpha->priv->timeline);
return (current_frame_num * CLUTTER_ALPHA_MAX_ALPHA) / nframes;
}
guint32
clutter_alpha_ramp_dec_func (ClutterAlpha *alpha)
{
int current_frame_num, nframes;
current_frame_num =
clutter_timeline_get_current_frame (alpha->priv->timeline);
nframes =
clutter_timeline_get_n_frames (alpha->priv->timeline);
return ((nframes - current_frame_num) * CLUTTER_ALPHA_MAX_ALPHA) / nframes;
}
guint32
clutter_alpha_ramp_func (ClutterAlpha *alpha)
{
int current_frame_num, nframes;
current_frame_num =
clutter_timeline_get_current_frame (alpha->priv->timeline);
nframes =
clutter_timeline_get_n_frames (alpha->priv->timeline);
if (current_frame_num > (nframes/2))
{
return ((nframes - current_frame_num)
* CLUTTER_ALPHA_MAX_ALPHA) / (nframes/2);
}
else
{
return (current_frame_num * CLUTTER_ALPHA_MAX_ALPHA) / (nframes/2);
}
}
/* Object */
static void
timeline_new_frame_cb (ClutterTimeline *timeline,
guint current_frame_num,
ClutterAlpha *alpha)
{
ClutterAlphaPrivate *priv;
priv = alpha->priv;
/* Update alpha value */
if (priv->func) {
priv->alpha = priv->func(alpha);
g_object_notify (G_OBJECT (alpha), "alpha");
}
}
static void
clutter_alpha_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
ClutterAlpha *alpha;
ClutterAlphaPrivate *priv;
alpha = CLUTTER_ALPHA(object);
priv = alpha->priv;
switch (prop_id)
{
case PROP_TIMELINE:
clutter_alpha_set_timeline (alpha, g_value_get_object (value));
break;
case PROP_FUNC:
priv->func = g_value_get_pointer (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
clutter_alpha_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
ClutterAlpha *alpha;
ClutterAlphaPrivate *priv;
alpha = CLUTTER_ALPHA(object);
priv = alpha->priv;
switch (prop_id)
{
case PROP_TIMELINE:
g_value_set_object (value, priv->timeline);
break;
case PROP_FUNC:
g_value_set_pointer (value, priv->func);
break;
case PROP_ALPHA:
g_value_set_int (value, priv->alpha);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
clutter_alpha_finalize (GObject *object)
{
G_OBJECT_CLASS (clutter_alpha_parent_class)->finalize (object);
}
static void
clutter_alpha_dispose (GObject *object)
{
ClutterAlpha *self = CLUTTER_ALPHA(object);
clutter_alpha_set_timeline (self, NULL);
G_OBJECT_CLASS (clutter_alpha_parent_class)->dispose (object);
}
static void
clutter_alpha_class_init (ClutterAlphaClass *klass)
{
GObjectClass *object_class;
object_class = (GObjectClass*) klass;
object_class->set_property = clutter_alpha_set_property;
object_class->get_property = clutter_alpha_get_property;
object_class->finalize = clutter_alpha_finalize;
object_class->dispose = clutter_alpha_dispose;
g_type_class_add_private (klass, sizeof (ClutterAlphaPrivate));
g_object_class_install_property
(object_class, PROP_TIMELINE,
g_param_spec_object ("timeline",
"Timeline",
"Timeline",
CLUTTER_TYPE_TIMELINE,
G_PARAM_READWRITE));
g_object_class_install_property
(object_class, PROP_FUNC,
g_param_spec_pointer ("func",
"Alpha function",
"Alpha function",
G_PARAM_READWRITE));
g_object_class_install_property
(object_class, PROP_ALPHA,
g_param_spec_int ("alpha",
"Alpha value",
"Alpha value",
0,
CLUTTER_ALPHA_MAX_ALPHA,
0,
G_PARAM_READABLE));
}
static void
clutter_alpha_init (ClutterAlpha *self)
{
self->priv = G_TYPE_INSTANCE_GET_PRIVATE(self,
CLUTTER_TYPE_ALPHA,
ClutterAlphaPrivate);
self->priv->func = CLUTTER_ALPHA_RAMP_INC;
}
/**
* clutter_alpha_get_alpha:
* @alpha: A #ClutterAlpha
*
* Query the current alpha value.
*
* Return Value: The current alpha value for the alpha
*/
gint32
clutter_alpha_get_alpha (ClutterAlpha *alpha)
{
g_return_val_if_fail (CLUTTER_IS_ALPHA (alpha), FALSE);
return alpha->priv->alpha;
}
/**
* clutter_alpha_set_func:
* @alpha: A #ClutterAlpha
* @func: A #ClutterAlphaAlphaFunc
*
*/
void
clutter_alpha_set_func (ClutterAlpha *alpha,
ClutterAlphaFunc func)
{
alpha->priv->func = func;
}
/**
* clutter_alpha_set_timeline:
* @alpha: A #ClutterAlpha
* @timeline: A #ClutterTimeline
*
* Binds @alpha to @timeline.
*/
void
clutter_alpha_set_timeline (ClutterAlpha *alpha,
ClutterTimeline *timeline)
{
if (alpha->priv->timeline)
{
g_signal_handler_disconnect (alpha->priv->timeline,
alpha->priv->timeline_new_frame_id);
g_object_unref (alpha->priv->timeline);
alpha->priv->timeline = NULL;
}
if (timeline)
{
alpha->priv->timeline = g_object_ref (timeline);
alpha->priv->timeline_new_frame_id =
g_signal_connect (alpha->priv->timeline,
"new-frame",
G_CALLBACK (timeline_new_frame_cb),
alpha);
}
}
/**
* clutter_alpha_get_timeline:
* @alpha: A #ClutterAlpha
*
* Return value: The #ClutterTimeline
*/
ClutterTimeline *
clutter_alpha_get_timeline (ClutterAlpha *alpha)
{
return alpha->priv->timeline;
}
/**
* clutter_alpha_new:
* @timeline: #ClutterTimeline timeline
* @func: #ClutterAlphaFunc alpha function
*
* Create a new #ClutterAlpha instance.
*
* Return Value: a new #ClutterAlpha
*/
ClutterAlpha*
clutter_alpha_new (ClutterTimeline *timeline,
ClutterAlphaFunc func)
{
return g_object_new (CLUTTER_TYPE_ALPHA,
"timeline", timeline,
"func", func,
NULL);
}

118
clutter/clutter-alpha.h Normal file
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@ -0,0 +1,118 @@
/*
* Clutter.
*
* An OpenGL based 'interactive canvas' library.
*
* Authored By Matthew Allum <mallum@openedhand.com>
* Jorn Baayen <jorn@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, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef _HAVE_CLUTTER_ALPHA_H
#define _HAVE_CLUTTER_ALPHA_H
/* clutter-alpha.h */
#include <glib-object.h>
#include "clutter-timeline.h"
G_BEGIN_DECLS
#define CLUTTER_TYPE_ALPHA clutter_alpha_get_type()
#define CLUTTER_ALPHA(obj) \
(G_TYPE_CHECK_INSTANCE_CAST ((obj), \
CLUTTER_TYPE_ALPHA, ClutterAlpha))
#define CLUTTER_ALPHA_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST ((klass), \
CLUTTER_TYPE_ALPHA, ClutterAlphaClass))
#define CLUTTER_IS_ALPHA(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE ((obj), \
CLUTTER_TYPE_ALPHA))
#define CLUTTER_IS_ALPHA_CLASS(klass) \
(G_TYPE_CHECK_CLASS_TYPE ((klass), \
CLUTTER_TYPE_ALPHA))
#define CLUTTER_ALPHA_GET_CLASS(obj) \
(G_TYPE_INSTANCE_GET_CLASS ((obj), \
CLUTTER_TYPE_ALPHA, ClutterAlphaClass))
typedef struct _ClutterAlpha ClutterAlpha;
typedef struct _ClutterAlphaClass ClutterAlphaClass;
typedef struct ClutterAlphaPrivate ClutterAlphaPrivate;
typedef guint32 (*ClutterAlphaFunc) (ClutterAlpha *alpha);
struct _ClutterAlpha
{
GObject parent;
ClutterAlphaPrivate *priv;
};
struct _ClutterAlphaClass
{
GObjectClass parent_class;
void (*_clutter_alpha_1) (void);
void (*_clutter_alpha_2) (void);
void (*_clutter_alpha_3) (void);
void (*_clutter_alpha_4) (void);
void (*_clutter_alpha_5) (void);
};
#define CLUTTER_ALPHA_MAX_ALPHA 0xffff
ClutterAlpha *
clutter_alpha_new (ClutterTimeline *timeline,
ClutterAlphaFunc func);
gint32
clutter_alpha_get_alpha (ClutterAlpha *alpha);
void
clutter_alpha_set_func (ClutterAlpha *alpha,
ClutterAlphaFunc func);
void
clutter_alpha_set_timeline (ClutterAlpha *alpha,
ClutterTimeline *timeline);
ClutterTimeline *
clutter_alpha_get_timeline (ClutterAlpha *alpha);
guint32
clutter_alpha_ramp_inc_func (ClutterAlpha *alpha);
guint32
clutter_alpha_ramp_dec_func (ClutterAlpha *alpha);
guint32
clutter_alpha_ramp_func (ClutterAlpha *alpha);
#define CLUTTER_ALPHA_RAMP_INC clutter_alpha_ramp_inc_func
#define CLUTTER_ALPHA_RAMP_DEC clutter_alpha_ramp_dec_func
#define CLUTTER_ALPHA_RAMP clutter_alpha_ramp_func
G_END_DECLS
#endif

2
clutter/clutter-behaviour.c
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@ -230,7 +230,7 @@ clutter_behaviour_set_timelime (ClutterBehaviour *behave,
priv->timeline = NULL;
}
if (behave)
if (timeline)
{
g_object_ref(timeline);
priv->timeline = timeline;

49
clutter/clutter-behaviours.c
View File

@ -148,9 +148,10 @@ G_DEFINE_TYPE (ClutterBehaviourOpacity, \
struct ClutterBehaviourOpacityPrivate
{
guint8 opacity_start;
guint8 opacity_end;
gulong handler_id; /* FIXME: handle in parent class ? */
ClutterAlpha *alpha;
guint8 opacity_start;
guint8 opacity_end;
gulong handler_id; /* FIXME: handle in parent class ? */
};
#define CLUTTER_BEHAVIOUR_OPACITY_GET_PRIVATE(obj) \
@ -166,9 +167,18 @@ clutter_behaviour_opacity_dispose (GObject *object)
if (self->priv)
{
if (self->priv->handler_id)
g_signal_handler_disconnect
(clutter_behaviour_get_timelime (CLUTTER_BEHAVIOUR(self)),
self->priv->handler_id);
{
g_signal_handler_disconnect
(clutter_behaviour_get_timelime (CLUTTER_BEHAVIOUR(self)),
self->priv->handler_id);
self->priv->handler_id = 0;
}
if (self->priv->alpha)
{
g_object_unref (self->priv->alpha);
self->priv->alpha = NULL;
}
}
G_OBJECT_CLASS (clutter_behaviour_opacity_parent_class)->dispose (object);
@ -220,11 +230,10 @@ clutter_behaviour_opacity_frame_foreach (ClutterActor *actor,
priv = CLUTTER_BEHAVIOUR_OPACITY_GET_PRIVATE (behave);
alpha = clutter_timeline_get_alpha
(clutter_behaviour_get_timelime (CLUTTER_BEHAVIOUR(behave)));
alpha = clutter_alpha_get_alpha (priv->alpha);
opacity = (alpha * (priv->opacity_end - priv->opacity_start))
/ CLUTTER_TIMELINE_MAX_ALPHA;
/ CLUTTER_ALPHA_MAX_ALPHA;
opacity += priv->opacity_start;
@ -234,9 +243,9 @@ clutter_behaviour_opacity_frame_foreach (ClutterActor *actor,
}
static void
clutter_behaviour_opacity_frame (ClutterTimeline *timelime,
gint frame_num,
gpointer data)
clutter_behaviour_opacity_frame (GObject *object,
GParamSpec *pspec,
gpointer data)
{
ClutterBehaviourOpacity *behave;
@ -249,23 +258,27 @@ clutter_behaviour_opacity_frame (ClutterTimeline *timelime,
}
ClutterBehaviour*
clutter_behaviour_opacity_new (ClutterTimeline *timeline,
guint8 opacity_start,
guint8 opacity_end)
clutter_behaviour_opacity_new (ClutterAlpha *alpha,
guint8 opacity_start,
guint8 opacity_end)
{
ClutterBehaviourOpacity *behave;
ClutterTimeline *timeline;
timeline = clutter_alpha_get_timeline (alpha);
behave = g_object_new (CLUTTER_TYPE_BEHAVIOUR_OPACITY,
"timeline", timeline,
NULL);
behave->priv->alpha = g_object_ref (alpha);
behave->priv->opacity_start = opacity_start;
behave->priv->opacity_end = opacity_end;
/* FIXME: Should be part of regular behave functionality */
behave->priv->handler_id
= g_signal_connect (timeline,
"new-frame",
= g_signal_connect (alpha,
"notify::alpha",
G_CALLBACK (clutter_behaviour_opacity_frame),
behave);

7
clutter/clutter-behaviours.h
View File

@ -3,6 +3,7 @@
#include <glib-object.h>
#include "clutter-behaviour.h"
#include "clutter-alpha.h"
G_BEGIN_DECLS
@ -94,9 +95,9 @@ struct _ClutterBehaviourOpacityClass
GType clutter_behaviour_opacity_get_type (void);
ClutterBehaviour*
clutter_behaviour_opacity_new (ClutterTimeline *timeline,
guint8 opacity_start,
guint8 opacity_end);
clutter_behaviour_opacity_new (ClutterAlpha *alpha,
guint8 opacity_start,
guint8 opacity_end);
G_END_DECLS

89
clutter/clutter-timeline.c
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@ -51,9 +51,6 @@ struct ClutterTimelinePrivate
gulong last_frame_msecs;
gulong start_frame_secs;
guint32 alpha;
ClutterTimelineAlphaFunc alpha_func;
guint loop : 1;
};
@ -62,8 +59,7 @@ enum
PROP_0,
PROP_FPS,
PROP_NFRAMES,
PROP_LOOP,
PROP_ALPHA
PROP_LOOP
};
enum
@ -77,41 +73,6 @@ enum
static int timeline_signals[LAST_SIGNAL] = { 0 };
/* Alpha funcs */
guint32
clutter_timeline_alpha_ramp_inc_func (ClutterTimeline *timeline)
{
return (timeline->priv->current_frame_num * CLUTTER_TIMELINE_MAX_ALPHA)
/ timeline->priv->nframes;
}
guint32
clutter_timeline_alpha_ramp_dec_func (ClutterTimeline *timeline)
{
return ((timeline->priv->nframes - timeline->priv->current_frame_num)
* CLUTTER_TIMELINE_MAX_ALPHA)
/ timeline->priv->nframes;
}
guint32
clutter_timeline_alpha_ramp_func (ClutterTimeline *timeline)
{
if (timeline->priv->current_frame_num > (timeline->priv->nframes/2))
{
return (((timeline->priv->nframes) - timeline->priv->current_frame_num)
* CLUTTER_TIMELINE_MAX_ALPHA)
/ (timeline->priv->nframes/2);
}
else
{
return (timeline->priv->current_frame_num * CLUTTER_TIMELINE_MAX_ALPHA)
/ (timeline->priv->nframes/2);
}
}
/* Object */
static void
@ -134,9 +95,6 @@ clutter_timeline_set_property (GObject *object,
case PROP_NFRAMES:
priv->nframes = g_value_get_int (value);
break;
case PROP_ALPHA:
priv->alpha = g_value_get_int (value);
break;
case PROP_LOOP:
priv->loop = g_value_get_boolean (value);
break;
@ -226,16 +184,6 @@ clutter_timeline_class_init (ClutterTimelineClass *klass)
50,
G_PARAM_CONSTRUCT | G_PARAM_READWRITE));
g_object_class_install_property
(object_class, PROP_ALPHA,
g_param_spec_int ("alpha",
"Alpha value for timeline",
"Alpha value for timeline",
0,
CLUTTER_TIMELINE_MAX_ALPHA,
0,
G_PARAM_READABLE));
g_object_class_install_property
(object_class, PROP_NFRAMES,
g_param_spec_int ("num-frames",
@ -295,8 +243,6 @@ clutter_timeline_init (ClutterTimeline *self)
self->priv = G_TYPE_INSTANCE_GET_PRIVATE(self,
CLUTTER_TYPE_TIMELINE,
ClutterTimelinePrivate);
self->priv->alpha_func = CLUTTER_ALPHA_RAMP_INC;
}
static gboolean
@ -351,10 +297,6 @@ timeline_timeout_func (gpointer data)
priv->last_frame_msecs = msecs;
/* Update alpha value */
if (priv->alpha_func)
priv->alpha = priv->alpha_func(timeline);
/* Advance frames */
priv->current_frame_num += nframes;;
@ -607,35 +549,6 @@ clutter_timeline_is_playing (ClutterTimeline *timeline)
return (timeline->priv->timeout_id != 0);
}
/**
* clutter_timeline_get_alpha:
* @timeline: A #ClutterTimeline
*
* Query the timelines current alpha value.
*
* Return Value: The current alpha value for the timeline
*/
gint32
clutter_timeline_get_alpha (ClutterTimeline *timeline)
{
g_return_val_if_fail (CLUTTER_IS_TIMELINE (timeline), FALSE);
return timeline->priv->alpha;
}
/**
* clutter_timeline_set_alpha_func:
* @timeline: A #ClutterTimeline
* @func: A #ClutterTimelineAlphaFunc
*
*/
void
clutter_timeline_set_alpha_func (ClutterTimeline *timeline,
ClutterTimelineAlphaFunc func)
{
timeline->priv->alpha_func = func;
}
/**
* clutter_timeline_new:
* @nframes: #ClutterTimeline number of frames

24
clutter/clutter-timeline.h
View File

@ -84,8 +84,6 @@ struct _ClutterTimelineClass
void (*_clutter_timeline_5) (void);
};
#define CLUTTER_TIMELINE_MAX_ALPHA 0xffff
GType clutter_timeline_get_type (void);
ClutterTimeline*
@ -127,28 +125,6 @@ clutter_timeline_get_n_frames (ClutterTimeline *timeline);
gboolean
clutter_timeline_is_playing (ClutterTimeline *timeline);
/* Alpha funcs */
gint32
clutter_timeline_get_alpha (ClutterTimeline *timeline);
void
clutter_timeline_set_alpha_func (ClutterTimeline *timeline,
ClutterTimelineAlphaFunc func);
guint32
clutter_timeline_alpha_ramp_inc_func (ClutterTimeline *timeline);
guint32
clutter_timeline_alpha_ramp_dec_func (ClutterTimeline *timeline);
guint32
clutter_timeline_alpha_ramp_func (ClutterTimeline *timeline);
#define CLUTTER_ALPHA_RAMP_INC clutter_timeline_alpha_ramp_inc_func
#define CLUTTER_ALPHA_RAMP_DEC clutter_timeline_alpha_ramp_dec_func
#define CLUTTER_ALPHA_RAMP clutter_timeline_alpha_ramp_func
G_END_DECLS
#endif

1
clutter/clutter.h
View File

@ -18,6 +18,7 @@
#include "clutter-clone-texture.h"
#include "clutter-video-texture.h"
#include "clutter-label.h"
#include "clutter-alpha.h"
#include "clutter-enum-types.h"
#endif

5
examples/behave.c
View File

@ -4,6 +4,7 @@ int
main (int argc, char *argv[])
{
ClutterTimeline *timeline;
ClutterAlpha *alpha;
ClutterBehaviour *behave;
ClutterActor *stage, *hand;
ClutterColor stage_color = { 0xcc, 0xcc, 0xcc, 0xff };
@ -32,10 +33,10 @@ main (int argc, char *argv[])
g_object_set(timeline, "loop", TRUE, 0);
/* Set an alpha func to power behaviour - ramp is constant rise/fall */
clutter_timeline_set_alpha_func (timeline, CLUTTER_ALPHA_RAMP);
alpha = clutter_alpha_new (timeline, CLUTTER_ALPHA_RAMP);
/* Create a behaviour for that time line */
behave = clutter_behaviour_opacity_new (timeline, 0X33 ,0xff);
behave = clutter_behaviour_opacity_new (alpha, 0X33 ,0xff);
/* Apply it to our actor */
clutter_behaviour_apply (behave, hand);