a86f1b45bb
ClutterEffect is an abstract class that should be used to apply effects on generic actors. The ClutterEffect class just defines what an effect should implement; it could be defined as an interface, but we might want to add some default behavior dependent on the internal state at a later point. The effect API applies to any actor, so we need to provide a way to assign an effect to an actor, and let ClutterActor call the Effect methods during the paint sequence. Once an effect is attached to an actor we will perform the paint in this order: • Effect::pre_paint() • Actor::paint signal emission • Effect::post_paint() Since an effect might collide with the Shader class, we either allow a shader or an effect for the time being.
110 lines
3.7 KiB
C
110 lines
3.7 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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* Copyright (C) 2010 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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* Author:
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* Emmanuele Bassi <ebassi@linux.intel.com>
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*/
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#if !defined(__CLUTTER_H_INSIDE__) && !defined(CLUTTER_COMPILATION)
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#error "Only <clutter/clutter.h> can be included directly."
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#endif
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#ifndef __CLUTTER_EFFECT_H__
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#define __CLUTTER_EFFECT_H__
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#include <clutter/clutter-actor-meta.h>
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G_BEGIN_DECLS
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#define CLUTTER_TYPE_EFFECT (clutter_effect_get_type ())
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#define CLUTTER_EFFECT(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), CLUTTER_TYPE_EFFECT, ClutterEffect))
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#define CLUTTER_IS_EFFECT(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), CLUTTER_TYPE_EFFECT))
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#define CLUTTER_EFFECT_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), CLUTTER_TYPE_EFFECT, ClutterEffectClass))
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#define CLUTTER_IS_EFFECT_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), CLUTTER_TYPE_EFFECT))
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#define CLUTTER_EFFECT_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), CLUTTER_TYPE_EFFECT, ClutterEffectClass))
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typedef struct _ClutterEffect ClutterEffect;
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typedef struct _ClutterEffectClass ClutterEffectClass;
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/**
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* ClutterEffect:
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*
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* The #ClutterEffect structure contains only private data and should
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* be accessed using the provided API
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*
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* Since: 1.4
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*/
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struct _ClutterEffect
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{
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/*< private >*/
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ClutterActorMeta parent_instance;
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};
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/**
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* ClutterEffectClass:
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* @prepare: virtual function
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* @pre_paint: virtual function
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* @post_paint: virtual function
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*
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* The #ClutterEffectClass structure contains only private data
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*
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* Since: 1.4
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*/
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struct _ClutterEffectClass
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{
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/*< private >*/
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ClutterActorMetaClass parent_class;
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/*< public >*/
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gboolean (* pre_paint) (ClutterEffect *effect);
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void (* post_paint) (ClutterEffect *effect);
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/*< private >*/
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void (* _clutter_effect1) (void);
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void (* _clutter_effect2) (void);
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void (* _clutter_effect3) (void);
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void (* _clutter_effect4) (void);
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void (* _clutter_effect5) (void);
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void (* _clutter_effect6) (void);
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};
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GType clutter_effect_get_type (void) G_GNUC_CONST;
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/*
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* ClutterActor API
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*/
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void clutter_actor_add_effect (ClutterActor *self,
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ClutterEffect *effect);
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void clutter_actor_add_effect_with_name (ClutterActor *self,
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const gchar *name,
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ClutterEffect *effect);
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void clutter_actor_remove_effect (ClutterActor *self,
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ClutterEffect *effect);
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void clutter_actor_remove_effect_by_name (ClutterActor *self,
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const gchar *name);
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GList * clutter_actor_get_effects (ClutterActor *self);
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ClutterEffect *clutter_actor_get_effect (ClutterActor *self,
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const gchar *name);
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void clutter_actor_clear_effects (ClutterActor *self);
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G_END_DECLS
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#endif /* __CLUTTER_EFFECT_H__ */
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