c3aa4d24bf
This adds a new virtual to ClutterEffect which is intended to be a
more flexible replacement for the pre and post_paint functions. The
implementation of a run virtual would look something like this:
void
effect_run (ClutterEffect *effect,
ClutterEffectRunFlags flags)
{
/* Set up state */
/* ... */
/* Chain to the next item in the paint sequence */
clutter_actor_continue_paint (priv->actor);
/* Clean up state */
/* ... */
}
ClutterActor now just calls this virtual instead of the pre_paint and
post_paint functions. It keeps track of the next effect in the list so
that it knows what to do when clutter_actor_continue_paint is
called. clutter_actor_continue_paint is a new function added just for
implementing effects.
The default implementation of the run virtual just calls pre_paint and
post_paint so that existing effects will continue to work.
An effect is allowed to conditionally skip calling
clutter_actor_continue_paint(). This is useful to implement effects
that cache the image of an actor. The flags parameter can be used to
determine if the actor is dirty since the last paint. ClutterActor
sets this flag whenever propagated_one_redraw is TRUE which means that
a redraw for this actor or one of its children was queued.
128 lines
4.3 KiB
C
128 lines
4.3 KiB
C
/*
|
||
* Clutter.
|
||
*
|
||
* An OpenGL based 'interactive canvas' library.
|
||
*
|
||
* Copyright (C) 2010 Intel Corporation.
|
||
*
|
||
* 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/>.
|
||
*
|
||
* Author:
|
||
* Emmanuele Bassi <ebassi@linux.intel.com>
|
||
*/
|
||
|
||
#if !defined(__CLUTTER_H_INSIDE__) && !defined(CLUTTER_COMPILATION)
|
||
#error "Only <clutter/clutter.h> can be included directly."
|
||
#endif
|
||
|
||
#ifndef __CLUTTER_EFFECT_H__
|
||
#define __CLUTTER_EFFECT_H__
|
||
|
||
#include <clutter/clutter-actor-meta.h>
|
||
|
||
G_BEGIN_DECLS
|
||
|
||
#define CLUTTER_TYPE_EFFECT (clutter_effect_get_type ())
|
||
#define CLUTTER_EFFECT(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), CLUTTER_TYPE_EFFECT, ClutterEffect))
|
||
#define CLUTTER_IS_EFFECT(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), CLUTTER_TYPE_EFFECT))
|
||
#define CLUTTER_EFFECT_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), CLUTTER_TYPE_EFFECT, ClutterEffectClass))
|
||
#define CLUTTER_IS_EFFECT_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), CLUTTER_TYPE_EFFECT))
|
||
#define CLUTTER_EFFECT_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), CLUTTER_TYPE_EFFECT, ClutterEffectClass))
|
||
|
||
typedef struct _ClutterEffectClass ClutterEffectClass;
|
||
|
||
/**
|
||
* ClutterEffectRunFlags:
|
||
* @CLUTTER_EFFECT_RUN_ACTOR_DIRTY: The actor or one of its children
|
||
* has queued a redraw before this paint. This implies that the effect
|
||
* should call clutter_actor_continue_paint() to chain to the next
|
||
* effect and can not cache any results from a previous paint.
|
||
*
|
||
* Flags passed to the ‘run’ method of #ClutterEffect.
|
||
*/
|
||
typedef enum
|
||
{
|
||
CLUTTER_EFFECT_RUN_ACTOR_DIRTY = (1 << 0)
|
||
} ClutterEffectRunFlags;
|
||
|
||
/**
|
||
* ClutterEffect:
|
||
*
|
||
* The #ClutterEffect structure contains only private data and should
|
||
* be accessed using the provided API
|
||
*
|
||
* Since: 1.4
|
||
*/
|
||
struct _ClutterEffect
|
||
{
|
||
/*< private >*/
|
||
ClutterActorMeta parent_instance;
|
||
};
|
||
|
||
/**
|
||
* ClutterEffectClass:
|
||
* @pre_paint: virtual function
|
||
* @post_paint: virtual function
|
||
* @get_paint_volume: virtual function
|
||
* @run: virtual function
|
||
*
|
||
* The #ClutterEffectClass structure contains only private data
|
||
*
|
||
* Since: 1.4
|
||
*/
|
||
struct _ClutterEffectClass
|
||
{
|
||
/*< private >*/
|
||
ClutterActorMetaClass parent_class;
|
||
|
||
/*< public >*/
|
||
gboolean (* pre_paint) (ClutterEffect *effect);
|
||
void (* post_paint) (ClutterEffect *effect);
|
||
|
||
gboolean (* get_paint_volume) (ClutterEffect *effect,
|
||
ClutterPaintVolume *volume);
|
||
|
||
void (* run) (ClutterEffect *effect,
|
||
ClutterEffectRunFlags flags);
|
||
|
||
/*< private >*/
|
||
void (* _clutter_effect3) (void);
|
||
void (* _clutter_effect4) (void);
|
||
void (* _clutter_effect5) (void);
|
||
void (* _clutter_effect6) (void);
|
||
};
|
||
|
||
GType clutter_effect_get_type (void) G_GNUC_CONST;
|
||
|
||
/*
|
||
* ClutterActor API
|
||
*/
|
||
|
||
void clutter_actor_add_effect (ClutterActor *self,
|
||
ClutterEffect *effect);
|
||
void clutter_actor_add_effect_with_name (ClutterActor *self,
|
||
const gchar *name,
|
||
ClutterEffect *effect);
|
||
void clutter_actor_remove_effect (ClutterActor *self,
|
||
ClutterEffect *effect);
|
||
void clutter_actor_remove_effect_by_name (ClutterActor *self,
|
||
const gchar *name);
|
||
GList * clutter_actor_get_effects (ClutterActor *self);
|
||
ClutterEffect *clutter_actor_get_effect (ClutterActor *self,
|
||
const gchar *name);
|
||
void clutter_actor_clear_effects (ClutterActor *self);
|
||
|
||
G_END_DECLS
|
||
|
||
#endif /* __CLUTTER_EFFECT_H__ */
|