Playing around with SDL2 on Mac and I wanted to see if I can get Metal working. I'm sort of stuck with how do I get

CAMetalLayer

out of SDL's internal function that returns it. But in CInterop it returns an

COpaquePointer

. The SDL function is

SDL_RenderGetMetalLayer

I've tried with

reinterpret

but it kept giving errors. How can I convert the returned

COpaquePointer

to be just

CAMetalLayer

that the function should return?