clone: scale src with apply_transform not cogl_scale
clone: scale src with apply_transform not cogl_scale

Since a ClutterClone may be allocated a different size than its source
actor we need to apply a scale factor before painting the source actor.
We were manually using cogl_scale to do this in clutter_clone_paint but
really this kind of thing is best handled in an implementation of the
apply_transform virtual so Clutter can be aware of the transform for
other purposes, such as input transformations. Also we want to provide
an implementation of the get_paint_volume virtual where Clutter will
also expect to be able to use the apply_transform virtual to transform
the volume into its parent's coordinate space.

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