> It's possible some hardware already does overlays, given that the talk I linked above was 2 years ago. I haven't researched this carefully. All hardware does

> It's possible some hardware already does overlays, given that the talk I linked above was 2 years ago. I haven't researched this carefully. All hardware does some overlays, though not a large number. (You can see Intel GPU overlay setup at [1].) One scanout overlay is already in use on all major OS's, to draw the mouse cursor. [1]: https://github.com/torvalds/linux/blob/e60e1ee60630cafef5e430c2ae364877e061d980/drivers/gpu/drm/i915/intel_device_info.c#L364 https://github.com/torvalds/linux/blob/e60e1ee60630cafef5e43...