feat: refresh on demand in menu (adaptive framerate)

src/engine/Engine.cpp

@@ -255,8 +255,8 @@ void Engine::updateFrontend() {
     gui->postAct();
 }
 
-void Engine::nextFrame() {
-    windowControl->nextFrame();
+void Engine::nextFrame(bool waitForRefresh) {
+    windowControl->nextFrame(waitForRefresh);
 }
 
 void Engine::startPauseLoop() {
@@ -275,7 +275,7 @@ void Engine::startPauseLoop() {
         if (isHeadless()) {
             platform::sleep(1.0 / params.tps * 1000);
         } else {
-            nextFrame();
+            nextFrame(false);
         }
     }
     if (initialCursorLocked) {

src/engine/Engine.hpp

@@ -99,7 +99,7 @@ public:
     void applicationTick();
     void updateFrontend();
     void renderFrame();
-    void nextFrame();
+    void nextFrame(bool waitForRefresh);
     void startPauseLoop();
     
     /// @brief Set screen (scene).

src/engine/Mainloop.cpp

@@ -45,7 +45,9 @@ void Mainloop::run() {
             engine.renderFrame();
         }
         engine.postUpdate();
-        engine.nextFrame();
+        engine.nextFrame(
+            dynamic_cast<const MenuScreen*>(engine.getScreen().get()) != nullptr
+        );
     }
     logger.info() << "main loop stopped";
 }

src/engine/WindowControl.cpp

@@ -8,6 +8,7 @@
 #include "window/input.hpp"
 #include "debug/Logger.hpp"
 #include "graphics/core/ImageData.hpp"
+#include "util/platform.hpp"
 
 static debug::Logger logger("window-control");
 
@@ -78,15 +79,19 @@ void WindowControl::toggleFullscreen() {
     }
 }
 
-void WindowControl::nextFrame() {
+void WindowControl::nextFrame(bool waitForRefresh) {
     const auto& settings = engine.getSettings();
     auto& window = engine.getWindow();
     auto& input = engine.getInput();
-    window.setFramerate(
-        window.isIconified() && settings.display.limitFpsIconified.get()
-            ? 20
-            : settings.display.framerate.get()
-    );
+    if (waitForRefresh) {
+        window.setFramerate(Window::FPS_UNLIMITED);
+    } else {
+        window.setFramerate(
+            window.isIconified() && settings.display.limitFpsIconified.get()
+                ? 20
+                : settings.display.framerate.get()
+        );
+    }
     window.swapBuffers();
-    input.pollEvents();
+    input.pollEvents(waitForRefresh);
 }

src/engine/WindowControl.hpp

@@ -16,7 +16,7 @@ public:
 
     Result initialize();
 
-    void nextFrame();
+    void nextFrame(bool waitForRefresh);
 
     void saveScreenshot();