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Add the ClutterEffect abstract class

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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.
This commit is contained in:
Emmanuele Bassi
2010-04-08 10:55:15 +01:00
parent 5ffbcbe9ee
commit a86f1b45bb
8 changed files with 654 additions and 30 deletions
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4
clutter/clutter-private.h
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@ -38,6 +38,7 @@
#include "clutter-backend.h"
#include "clutter-device-manager.h"
#include "clutter-effect.h"
#include "clutter-event.h"
#include "clutter-feature.h"
#include "clutter-id-pool.h"
@ -331,6 +332,9 @@ void _clutter_run_repaint_functions (void);
gint32 _clutter_backend_get_units_serial (ClutterBackend *backend);
gboolean _clutter_effect_pre_paint (ClutterEffect *effect);
void _clutter_effect_post_paint (ClutterEffect *effect);
G_END_DECLS
#endif /* _HAVE_CLUTTER_PRIVATE_H */