clutter-offscreen-effect: Don't redraw the actor if cached offscreen
clutter-offscreen-effect: Don't redraw the actor if cached offscreen

When painting an actor, it now tries to determine if the last paint of
the offscreen was using the same matrix and the actor isn't dirty. If
so, it can skip calling clutter_actor_continue_paint and avoid
actually painting the actor. Instead just the offscreen image will be
painted.

djdeath/clutter,Distrotech/clutter,djdeath/clutter-android,djdeath/clutter-android,dlespiau/clutter,dlespiau/clutter,spatulasnout/clutter,jigpu/clutter,djdeath/clutter-multithreaded,ebassi/clutter,ebassi/clutter,djdeath/clutter,djdeath/clutter-multithreaded,GNOME/clutter,ebassi/clutter,djdeath/clutter-android,djdeath/clutter-android,jigpu/clutter,ebassi/clutter,Distrotech/clutter,djdeath/clutter,GNOME/clutter,GNOME/clutter,GNOME/clutter,dlespiau/clutter,collects/clutter,collects/clutter,kerrickstaley/clutter-vala,kerrickstaley/clutter-vala,spatulasnout/clutter,Distrotech/clutter,heysion/clutter-clone,heysion/clutter-clone,Distrotech/clutter,heysion/clutter-clone,spatulasnout/clutter,GNOME/clutter,Distrotech/clutter,jigpu/clutter,djdeath/clutter,kerrickstaley/clutter-vala,jigpu/clutter,djdeath/clutter-multithreaded,jigpu/clutter,collects/clutter,heysion/clutter-clone,heysion/clutter-clone,spatulasnout/clutter,kerrickstaley/clutter-vala,collects/clutter,djdeath/clutter-multithreaded,collects/clutter,djdeath/clutter-android,ebassi/clutter,spatulasnout/clutter,djdeath/clutter,jigpu/clutter,djdeath/clutter,Distrotech/clutter