Source SDK 2013 GamepadUI patch - reverse engineered from macOS binaries

gamepadui.patch

diff --git a/sp/src/game/client/cdll_client_int.cpp b/sp/src/game/client/cdll_client_int.cpp
index 10cce078..e0016269 100644
--- a/sp/src/game/client/cdll_client_int.cpp
+++ b/sp/src/game/client/cdll_client_int.cpp
@@ -203,6 +203,7 @@ ISceneFileCache *scenefilecache = NULL;
 IXboxSystem *xboxsystem = NULL;	// Xbox 360 only
 IMatchmaking *matchmaking = NULL;
 IUploadGameStats *gamestatsuploader = NULL;
+IGamepadUI* g_pGamepadUI = NULL;
 IClientReplayContext *g_pClientReplayContext = NULL;
 #if defined( REPLAY_ENABLED )
 IReplayManager *g_pReplayManager = NULL;
@@ -1137,6 +1138,28 @@ void CHLClient::PostInit()
 
 	g_ClientVirtualReality.StartupComplete();
 
+	CSysModule* pModule = g_pFullFileSystem->LoadModule("gamepadui", "GAMEBIN");
+	const Color blue(0, 148, 255, 255);
+	if (pModule) {
+		ConColorMsg(blue, "[GamepadUI] Loaded gamepadui module.\n");
+		CreateInterfaceFn factory = Sys_GetFactory(pModule);
+		if (factory) {
+			g_pGamepadUI = (IGamepadUI*)factory("GamepadUI001", 0);
+			if (g_pGamepadUI) {
+				ConColorMsg(blue, "[GamepadUI] Initializing IGamepadUI interface...\n");
+				factorylist_t list;
+				FactoryList_Retrieve(list);
+				g_pGamepadUI->Init(list.appSystemFactory);
+			} else {
+				ConColorMsg(blue, "[GamepadUI] Unable to pull IGamepadUI interface.\n");
+			}
+		} else {
+			ConColorMsg(blue, "[GamepadUI] Unable to get gamepadui factory.\n");
+		}
+	} else {
+		ConColorMsg(blue, "[GamepadUI] Unable to load gamepadui module\n");
+	}
+
 #ifdef HL1MP_CLIENT_DLL
 	if ( s_cl_load_hl1_content.GetBool() && steamapicontext && steamapicontext->SteamApps() )
 	{
@@ -1192,6 +1215,8 @@ void CHLClient::Shutdown( void )
 	UncacheAllMaterials();
 
 	IGameSystem::ShutdownAllSystems();
+
+	if (g_pGamepadUI) g_pGamepadUI->Shutdown();
 	
 	gHUD.Shutdown();
 	VGui_Shutdown();
@@ -1281,6 +1306,8 @@ void CHLClient::HudUpdate( bool bActive )
 	// I can check into this further.
 	C_BaseTempEntity::CheckDynamicTempEnts();
 
+	if (g_pGamepadUI) g_pGamepadUI->HudUpdate(frametime);
+
 #ifdef SIXENSE
 	// If we're not connected, update sixense so we can move the mouse cursor when in the menus
 	if( !engine->IsConnected() || engine->IsPaused() )
@@ -1627,6 +1654,8 @@ void CHLClient::LevelInitPreEntity( char const* pMapName )
 
 	gHUD.LevelInit();
 
+	if (g_pGamepadUI) g_pGamepadUI->LevelInitPreEntity();
+
 #if defined( REPLAY_ENABLED )
 	// Initialize replay ragdoll recorder
 	if ( !engine->IsPlayingDemo() )
@@ -1645,6 +1674,7 @@ void CHLClient::LevelInitPostEntity( )
 	IGameSystem::LevelInitPostEntityAllSystems();
 	C_PhysPropClientside::RecreateAll();
 	internalCenterPrint->Clear();
+	if (g_pGamepadUI) g_pGamepadUI->LevelInitPostEntity();
 }
 
 //-----------------------------------------------------------------------------
@@ -1711,6 +1741,8 @@ void CHLClient::LevelShutdown( void )
 	
 	StopAllRumbleEffects();
 
+	if (g_pGamepadUI) g_pGamepadUI->LevelShutdown();
+
 	gHUD.LevelShutdown();
 
 	internalCenterPrint->Clear();
diff --git a/sp/src/game/client/cdll_client_int.h b/sp/src/game/client/cdll_client_int.h
index c2456332..ab06e8dd 100644
--- a/sp/src/game/client/cdll_client_int.h
+++ b/sp/src/game/client/cdll_client_int.h
@@ -60,6 +60,17 @@ class IEngineClientReplay;
 class IReplayScreenshotManager;
 class CSteamID;
 
+abstract_class IGamepadUI {
+public:
+	virtual void Unused() = 0;
+	virtual void Init(CreateInterfaceFn) = 0;
+	virtual void Shutdown() = 0;
+	virtual void HudUpdate(float frametime) = 0;
+	virtual void LevelInitPreEntity() = 0;
+	virtual void LevelInitPostEntity() = 0;
+	virtual void LevelShutdown() = 0;
+};
+
 //=============================================================================
 // HPE_BEGIN
 // [dwenger] Necessary for stats display
@@ -103,6 +114,7 @@ extern IXboxSystem *xboxsystem;	// Xbox 360 only
 extern IMatchmaking *matchmaking;
 extern IVideoServices *g_pVideo;
 extern IUploadGameStats *gamestatsuploader;
+extern IGamepadUI* g_pGamepadUI;
 extern CSteamAPIContext *steamapicontext;
 extern IReplaySystem *g_pReplay;
 extern IClientReplayContext *g_pClientReplayContext;