They have but failed: https://developer.nvidia.com/nvapi
Why have AMD made it open source? Well the more people that take it up the better the adoption and easier it is across different vender GPU's support. Better then nVIDIA that have G sync yet will only work with their GPU's and have said out right they are not going to share it. As far as i am concerned G sync is DOA with just that comment alone since they are not even interested in providing licences to make the technology wide spread.
AMD have made the right move in having it open source. nVIDIA arrogance all over again.
Why have AMD made it open source? Well the more people that take it up the better the adoption and easier it is across different vender GPU's support. Better then nVIDIA that have G sync yet will only work with their GPU's and have said out right they are not going to share it. As far as i am concerned G sync is DOA with just that comment alone since they are not even interested in providing licences to make the technology wide spread.
AMD have made the right move in having it open source. nVIDIA arrogance all over again.