Backlight setting

src/frontend/menu.cpp

@@ -246,7 +246,7 @@ Panel* create_settings_panel(Engine* engine, PagesControl* menu) {
         panel->add(trackbar);
     }
 
-    {
+    /* V-Sync checkbox */{
         Panel* checkpanel = new Panel(vec2(400, 32), vec4(5.0f), 1.0f);
         checkpanel->color(vec4(0.0f));
         checkpanel->orientation(Orientation::horizontal);
@@ -265,6 +265,25 @@ Panel* create_settings_panel(Engine* engine, PagesControl* menu) {
         panel->add(checkpanel);
     }
 
+    /* Backlight checkbox */{
+        Panel* checkpanel = new Panel(vec2(400, 32), vec4(5.0f), 1.0f);
+        checkpanel->color(vec4(0.0f));
+        checkpanel->orientation(Orientation::horizontal);
+
+        CheckBox* checkbox = new CheckBox();
+        checkbox->margin(vec4(0.0f, 0.0f, 5.0f, 0.0f));
+        checkbox->supplier([=]() {
+            return engine->getSettings().graphics.backlight != 0;
+        });
+        checkbox->consumer([=](bool checked) {
+            engine->getSettings().graphics.backlight = checked;
+        });
+        checkpanel->add(checkbox);
+        checkpanel->add(new Label(L"Backlight"));
+
+        panel->add(checkpanel);
+    }
+
     panel->add(gotoButton(L"Controls", "controls", menu));
     panel->add(backButton(menu));
     panel->refresh();

src/frontend/screens.cpp

@@ -87,12 +87,14 @@ void MenuScreen::draw(float delta) {
     batch->render();
 }
 
+static bool backlight;
 LevelScreen::LevelScreen(Engine* engine, Level* level) 
     : Screen(engine), 
       level(level) {
     cache = new ContentGfxCache(level->content, engine->getAssets());
     worldRenderer = new WorldRenderer(engine, level, cache);
     hud = new HudRenderer(engine, level, cache);
+    backlight = engine->getSettings().graphics.backlight;
 }
 
 LevelScreen::~LevelScreen() {
@@ -130,6 +132,10 @@ void LevelScreen::update(float delta) {
     if (!gui->isFocusCaught()) {
         updateHotkeys();
     }
+    if (settings.graphics.backlight != backlight) {
+        level->chunks->clear();
+        backlight = settings.graphics.backlight;
+    }
     level->updatePlayer(delta, !inputLocked, hud->isPause(), !inputLocked);
     level->update();
     

src/frontend/world_render.cpp

@@ -35,7 +35,7 @@ using std::shared_ptr;
 WorldRenderer::WorldRenderer(Engine* engine, Level* level, const ContentGfxCache* cache) 
 	: engine(engine), level(level) {
 	lineBatch = new LineBatch(4096);
-	renderer = new ChunksRenderer(level, cache);
+	renderer = new ChunksRenderer(level, cache, engine->getSettings());
 	frustumCulling = new Frustum();
 	level->events->listen(EVT_CHUNK_HIDDEN, [this](lvl_event_type type, Chunk* chunk) {
 		renderer->unload(chunk);