old news but somewhat important question
if amd already created mantle, why did microsoft have to spend the resources to create dx12? how much of mantle is identical to dx12 codepath? is this a purely "legalistic/red-tape" move or was there any real engineering background logic as to why this is so?
if there are any devs in the house that see this this question is for you and please, if you can make your answer as technical as possible.
thank you gentlemen