[RFC] wl_surface scale and crop protocol extension

[Bill Spitzak]

Pekka Paalanen wrote:

> What chip do you have in mind, that can do arbitrary
> matrix-based transforms during an overlay scanout?

That just means the surface cannot use the overlay, or the compositor 
has to use an intermediate image. There are lots of other reasons the 
surface does not use the overlay, such as not being the top one.