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controller_leds(3)		  Arcan Lua API 	      controller_leds(3)

NAME
     controller_leds - Query or rescan for LED controllers

SYNOPSIS
     [nleds, variable, rgb] or [nctrls, low32, high32]
     controller_leds( ctrlid )

DESCRIPTION
     If  ctrlid    is set, the values for the specified controller are returned.
     The id of a controller can be retrieved as part of the _input event handler
     on status == "added" events either directly on devkind == "led" or for some
     other devices through the devref field. _display_state events may also pro-
     vide a ledctrl,ledind. If ctrlid  is not set or set to -1, a rescan will be
     queued that might generate additional device status events. It also returns
     the number of active controllers  and  two  bitmasks  (capped  to	64  con-
     trollers)

EXAMPLE
     function controller_leds0()
	   local do_ctrl = function(i)
		 local nleds, shift, rgb = controller_leds(i);
		 print("controller", i, "leds:", nleds,
		       "intensity:", intensity and "yes" or "no",
		       "rgb:", rgb and "yes" or "no");
	   end
     -- due to the double size restriction, this had to be split
	   local count, first, second = controller_leds();
	   print("# controllers:", count);
	   for i=0, 31 do
		 if (bit.band(first, bit.lshift(1, i))) then
		       do_ctrl(i);
		 end
	   end
	   for i=0, 31 do
		 if (bit.band(first, bit.lshift(1, i))) then
		       do_ctrl(32, i);
		 end
	   end
     end

iodev				   August 2026		      controller_leds(3)

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