LoadingWindow driver fallbacks.

stepmania/src/arch/arch.cpp

@@ -23,7 +23,50 @@
 #include "arch_Win32.h"
 #endif
 
-LoadingWindow *MakeLoadingWindow() { return new ARCH_LOADING_WINDOW; }
+LoadingWindow *MakeLoadingWindow()
+{
+	/* Don't load NULL by default.  On most systems, if we can't load the SDL
+	 * loading window, we won't be able to init OpenGL, either, so don't bother. */
+	CString drivers = "win32,cocoa,gtk,sdl";
+	CStringArray DriversToTry;
+	split(drivers, ",", DriversToTry, true);
+
+	ASSERT( DriversToTry.size() != 0 );
+
+	CString Driver;
+	LoadingWindow *ret = NULL;
+
+	for(unsigned i = 0; ret == NULL && i < DriversToTry.size(); ++i)
+	{
+		try {
+			Driver = DriversToTry[i];
+
+#ifdef HAVE_LOADING_WINDOW_WIN32
+			if(!DriversToTry[i].CompareNoCase("Win32")) ret = new LoadingWindow_Win32;
+#endif
+#ifdef HAVE_LOADING_WINDOW_GTK
+			if(!DriversToTry[i].CompareNoCase("Gtk")) ret = new LoadingWindow_Gtk;
+#endif
+#ifdef HAVE_LOADING_WINDOW_COCOA
+			if(!DriversToTry[i].CompareNoCase("Cocoa")) ret = new LoadingWindow_Cocoa;
+#endif
+#ifdef HAVE_LOADING_WINDOW_SDL
+			if(!DriversToTry[i].CompareNoCase("SDL")) ret = new LoadingWindow_SDL;
+#endif
+#ifdef HAVE_LOADING_WINDOW_NULL
+			if(!DriversToTry[i].CompareNoCase("Null")) ret = new LoadingWindow_Null;
+#endif
+		} catch(const RageException &e) {
+			LOG->Info("Couldn't load driver %s: %s", DriversToTry[i].c_str(), e.what());
+		}
+	}
+	
+	if(ret)
+		LOG->Info("Loading window: %s", Driver.c_str());
+	
+	return ret;
+}
+
 ErrorDialog *MakeErrorDialog() { return new ARCH_ERROR_DIALOG; }
 ArchHooks *MakeArchHooks() { return new ARCH_HOOKS; }
 #if defined(SUPPORT_OPENGL)