* Expose vsync interval with new cvar rpi_vsync_interval
On change, the rpi_vsync_interval is broadcasted to a new event on
the WindowNotificationBus and all swapchains are recreated with the
new vsync value.
Signed-off-by: Jeremy Ong <jeremycong@gmail.com>
* Add vsync interval support to the Vulkan RHI
Vsync intervals are not intrinsically supported using the Vulkan
swapchain extension. Instead, extra presents are enqueued for each
extra vblank requested past 1. Swapchain recreation is triggered
when transitioning to and from the FIFO presentation mode (when
rpi_vsync_interval transitions from and to 0 respectively).
Signed-off-by: Jeremy Ong <jeremycong@gmail.com>
* Rollback vsync > 1 implementation on Vulkan and leverage *Internal pattern
Signed-off-by: Jeremy Ong <jeremycong@gmail.com>
Jeremy Ong
11327b59ea