CoreGL needs an ES interface and implementation set. This should be very easy to do with the existing API. The ES-friendly parts of CoreGL just need to be extracted to a parent interface CoreGLES (or something like that). The same thing can be done with the implementations but with subclassing (sorry @void256 it's the best way to do it for this xD). No overrides will be necessary of course.
CoreGL needs an ES interface and implementation set. This should be very easy to do with the existing API. The ES-friendly parts of CoreGL just need to be extracted to a parent interface CoreGLES (or something like that). The same thing can be done with the implementations but with subclassing (sorry @void256 it's the best way to do it for this xD). No overrides will be necessary of course.