Re: RFC for a render API to support adaptive sync and VRR

On 2018-04-10 06:26 PM, Cyr, Aric wrote:> > My guess is they prefer to “do nothing” and let driver/HW manage it,

otherwise you exempt all existing games from supporting adaptive sync without a rewrite or update.

Nobody is saying adaptive sync should only work with explicit target presentation times provided by the application. We're just arguing that target presentation time as a mechanism is superior to target refresh rate, both for video and game use cases. It also trivially allows emulating "as early as possible" (target presentation time = 0) and "fixed refresh rate" (target presentation time = start + i * target frame duration) behaviour, even transparently for the application.