stats.lua: enable --tone-mapping-visualize while stats shown

Except in oneshot mode. Controllable via new option.

DOCS/man/stats.rst

@@ -97,6 +97,11 @@ Configurable Options
 
     Show graphs for vsync and jitter values (page 1). Only when toggled.
 
+``plot_tonemapping_lut``
+    Default: yes
+
+    Enable tone-mapping LUT visualization automatically. Only when toggled.
+
 ``flush_graph_data``
     Default: yes
 

player/lua/stats.lua

@@ -35,6 +35,7 @@ local o = {
     plot_perfdata = true,
     plot_vsync_ratio = true,
     plot_vsync_jitter = true,
+    plot_tonemapping_lut = true,     -- also enable tone-mapping-visualize
     skip_frames = 5,
     global_max = true,
     flush_graph_data = true,         -- clear data buffers when toggling
@@ -95,6 +96,7 @@ local cache_recorder_timer = nil
 local curr_page = o.key_page_1
 local pages = {}
 local scroll_bound = false
+local tm_viz_prev = nil
 -- Save these sequences locally as we'll need them a lot
 local ass_start = mp.get_property_osd("osd-ass-cc/0")
 local ass_stop = mp.get_property_osd("osd-ass-cc/1")
@@ -1209,6 +1211,10 @@ local function process_key_binding(oneshot)
         elseif not display_timer.oneshot and not oneshot then
             display_timer:kill()
             cache_recorder_timer:stop()
+            if tm_viz_prev ~= nil then
+                mp.set_property_native("tone-mapping-visualize", tm_viz_prev)
+                tm_viz_prev = nil
+            end
             clear_screen()
             remove_page_bindings()
             if recorder then
@@ -1226,6 +1232,10 @@ local function process_key_binding(oneshot)
             -- changes, but it's fine for an internal script.
             mp.observe_property("vsync-jitter", "none", recorder)
         end
+        if not oneshot and o.plot_tonemapping_lut then
+            tm_viz_prev = mp.get_property_native("tone-mapping-visualize")
+            mp.set_property_native("tone-mapping-visualize", true)
+        end
         if not oneshot then
             cache_ahead_buf = {0, pos = 1, len = 50, max = 0}
             cache_speed_buf = {0, pos = 1, len = 50, max = 0}