osc: don't delay updates on resize

The idea is that if the player is resized, we do not delay redrawing
(which is normally done to limit the redraw rate to something
reasonable).

Not sure if this even does anything. For one, reacting to osd-dimensions
changes is cleaner than just polling the screen size with the next tick
event, and hoping that resizes generate tick events for whatever
logically unrelated reasons.

player/lua/osc.lua

@@ -2191,6 +2191,16 @@ end
 
 function request_init()
     state.initREQ = true
+    request_tick()
+end
+
+-- Like request_init(), but also request an immediate update
+function request_init_resize()
+    request_init()
+    -- ensure immediate update
+    state.tick_timer:kill()
+    state.tick_timer.timeout = 0
+    state.tick_timer:resume()
 end
 
 function render_wipe()
@@ -2208,7 +2218,7 @@ function render()
     if not (state.mp_screen_sizeX == current_screen_sizeX
         and state.mp_screen_sizeY == current_screen_sizeY) then
 
-        request_init()
+        request_init_resize()
 
         state.mp_screen_sizeX = current_screen_sizeX
         state.mp_screen_sizeY = current_screen_sizeY
@@ -2556,19 +2566,19 @@ end)
 mp.observe_property("fullscreen", "bool",
     function(name, val)
         state.fullscreen = val
-        request_init()
+        request_init_resize()
     end
 )
 mp.observe_property("border", "bool",
     function(name, val)
         state.border = val
-        request_init()
+        request_init_resize()
     end
 )
 mp.observe_property("window-maximized", "bool",
     function(name, val)
         state.maximized = val
-        request_init()
+        request_init_resize()
     end
 )
 mp.observe_property("idle-active", "bool",
@@ -2585,6 +2595,11 @@ end)
 mp.observe_property("playback-time", "number", function(name, val)
     request_tick()
 end)
+mp.observe_property("osd-dimensions", "native", function(name, val)
+    -- (we could use the value instead of re-querying it all the time, but then
+    --  we might have to worry about property update ordering)
+    request_init_resize()
+end)
 
 -- mouse show/hide bindings
 mp.set_key_bindings({