fix(network): fix multiplayer uncapped FPS and add buffer HUD

Core/GameEngine/Include/GameNetwork/NetworkInterface.h

@@ -64,6 +64,7 @@ class NetworkInterface : public SubsystemInterface
 	virtual void parseUserList( const GameInfo *game ) = 0;						///< Parse a userlist, creating connections
 	virtual void startGame() = 0;																	///< Sets the network game frame counter to -1
 	virtual UnsignedInt getRunAhead() = 0;												///< Get the current RunAhead value
+	virtual UnsignedInt getBufferedFramesAvailable() = 0;
 	virtual UnsignedInt getFrameRate() = 0;												///< Get the current allowed frame rate.
 	virtual UnsignedInt getPacketArrivalCushion() = 0;						///< Get the smallest packet arrival cushion since this was last called.
 

Core/GameEngine/Source/GameNetwork/GameSpy/StagingRoomGameInfo.cpp

@@ -857,7 +857,7 @@ void GameSpyStagingRoom::launchGame()
 	GameMessage *msg = TheMessageStream->appendMessage( GameMessage::MSG_NEW_GAME );
 	msg->appendIntegerArgument(GAME_INTERNET);
 
-	TheWritableGlobalData->m_useFpsLimit = false;
+	// TheWritableGlobalData->m_useFpsLimit = false; // GeneralsX @bugfix fbraz3 21/07/2026 Keep FPS limiter active in multiplayer to avoid rendering at uncapped 500+ FPS
 
 	// Set the seeds
 	InitRandom( getSeed() );

Core/GameEngine/Source/GameNetwork/LANAPICallbacks.cpp

@@ -255,7 +255,7 @@ void LANAPI::OnGameStart()
 		GameMessage *msg = TheMessageStream->appendMessage( GameMessage::MSG_NEW_GAME );
 		msg->appendIntegerArgument(GAME_LAN);
 
-		TheWritableGlobalData->m_useFpsLimit = false;
+		// TheWritableGlobalData->m_useFpsLimit = false; // GeneralsX @bugfix fbraz3 21/07/2026 Keep FPS limiter active in multiplayer to avoid rendering at uncapped 500+ FPS
 
 		// Set the seeds
 		InitRandom( m_currentGame->getSeed() );

Core/GameEngine/Source/GameNetwork/Network.cpp

@@ -113,6 +113,7 @@ class Network : public NetworkInterface
 
 	virtual void setLocalAddress(UnsignedInt ip, UnsignedInt port) override;
 	virtual UnsignedInt getRunAhead() override { return m_runAhead; }
+	virtual UnsignedInt getBufferedFramesAvailable() override;
 	virtual UnsignedInt getFrameRate() override { return m_frameRate; }
 	virtual UnsignedInt getPacketArrivalCushion() override;								///< Returns the smallest packet arrival cushion since this was last called.
 	virtual Bool isFrameDataReady() override;
@@ -589,6 +590,16 @@ Bool Network::AllCommandsReady(UnsignedInt frame) {
 	return m_conMgr->allCommandsReady(frame);// && m_conMgr->allCRCsReady(frame);
 }
 
+UnsignedInt Network::getBufferedFramesAvailable() {
+	UnsignedInt currentFrame = TheGameLogic->getFrame();
+	UnsignedInt readyCount = 0;
+	// Limit the search so we don't loop forever if network is somehow way ahead
+	while(AllCommandsReady(currentFrame + readyCount) && readyCount < 100) {
+		readyCount++;
+	}
+	return readyCount;
+}
+
 /**
  * Take commands from the connection manager and put them on TheCommandList.
  * The commands need to be put on in the same order across all clients.

Generals/Code/GameEngine/Source/GameNetwork/GameSpyGameInfo.cpp

@@ -560,7 +560,7 @@ void GameSpyLaunchGame()
 		GameMessage *msg = TheMessageStream->appendMessage( GameMessage::MSG_NEW_GAME );
 		msg->appendIntegerArgument(GAME_INTERNET);
 
-		TheGlobalData->m_useFpsLimit = false;
+		// TheGlobalData->m_useFpsLimit = false; // GeneralsX @bugfix fbraz3 21/07/2026 Keep FPS limiter active in multiplayer to avoid rendering at uncapped 500+ FPS
 
 		// Set the random seed
 		InitGameLogicRandom( TheGameSpyGame->getSeed() );

Generals/Code/GameEngineDevice/Source/W3DDevice/GameClient/W3DDisplay.cpp

@@ -1241,7 +1241,11 @@ void W3DDisplay::gatherDebugStats()
 		}
 #endif
 
-		fpsString.format( L"FPS: %.2f", fps);
+		if (TheNetwork != nullptr) {
+			fpsString.format( L"FPS: %.2f (Buf: %d)", fps, TheNetwork->getBufferedFramesAvailable() );
+		} else {
+			fpsString.format( L"FPS: %.2f", fps);
+		}
 		m_benchmarkDisplayString->setText( fpsString );
 
 		Int polyPerFrame = Debug_Statistics::Get_DX8_Polygons();

GeneralsMD/Code/GameEngine/Source/GameNetwork/GameSpyGameInfo.cpp

@@ -560,7 +560,7 @@ void GameSpyLaunchGame()
 		GameMessage *msg = TheMessageStream->appendMessage( GameMessage::MSG_NEW_GAME );
 		msg->appendIntegerArgument(GAME_INTERNET);
 
-		TheGlobalData->m_useFpsLimit = false;
+		// TheGlobalData->m_useFpsLimit = false; // GeneralsX @bugfix fbraz3 21/07/2026 Keep FPS limiter active in multiplayer to avoid rendering at uncapped 500+ FPS
 
 		// Set the random seed
 		InitGameLogicRandom( TheGameSpyGame->getSeed() );

GeneralsMD/Code/GameEngineDevice/Source/W3DDevice/GameClient/W3DDisplay.cpp

@@ -1313,7 +1313,11 @@ void W3DDisplay::gatherDebugStats()
 		}
 #endif
 
-		fpsString.format( L"FPS: %.2f", fps);
+		if (TheNetwork != nullptr) {
+			fpsString.format( L"FPS: %.2f (Buf: %d)", fps, TheNetwork->getBufferedFramesAvailable() );
+		} else {
+			fpsString.format( L"FPS: %.2f", fps);
+		}
 		m_benchmarkDisplayString->setText( fpsString );
 
 		Int polyPerFrame = Debug_Statistics::Get_DX8_Polygons();