Dimming screensaver

I learned that the external screensaver has been removed from Weston.

I found that it is possible to totally blank the screen with the idle parameter, and wake it up again with input.

This is so far fine, but we are running a kiosk service, and want the screen to dim to save power, and when the screen is touched, then it will increase the backlight to 100% again.

I had hoped this was possible with an external screensaver, but as this is no-longer supported, what can I use then?