text: /*************************************************************************/
  /*  main.cpp                                                             */
  /*************************************************************************/
  /*                       This file is part of:                           */
  /*                           GODOT ENGINE                                */
  /*                      https://godotengine.org                          */
  /*************************************************************************/
  /* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur.                 */
  /* Copyright (c) 2014-2020 Godot Engine contributors (cf. AUTHORS.md).   */
  /*                                                                       */
  /* Permission is hereby granted, free of charge, to any person obtaining */
  /* a copy of this software and associated documentation files (the       */
  /* "Software"), to deal in the Software without restriction, including   */
  /* without limitation the rights to use, copy, modify, merge, publish,   */
  /* distribute, sublicense, and/or sell copies of the Software, and to    */
  /* permit persons to whom the Software is furnished to do so, subject to */
  /* the following conditions:                                             */
  /*                                                                       */
  /* The above copyright notice and this permission notice shall be        */
  /* included in all copies or substantial portions of the Software.       */
  /*                                                                       */
  /* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
  /* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
  /* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
  /* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
  /* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
  /* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
  /* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
  /*************************************************************************/
  
  #include "main.h"
  
  #include "core/crypto/crypto.h"
  #include "core/input_map.h"
  #include "core/io/file_access_network.h"
  #include "core/io/file_access_pack.h"
  #include "core/io/file_access_zip.h"
  #include "core/io/image_loader.h"
  #include "core/io/ip.h"
  #include "core/io/resource_loader.h"
  #include "core/message_queue.h"
  #include "core/os/dir_access.h"
  #include "core/os/os.h"
  #include "core/project_settings.h"
  #include "core/register_core_types.h"
  #include "core/script_debugger_local.h"
  #include "core/script_language.h"
  #include "core/translation.h"
  #include "core/version.h"
  #include "core/version_hash.gen.h"
  #include "drivers/register_driver_types.h"
  #include "main/app_icon.gen.h"
  #include "main/input_default.h"
  #include "main/main_timer_sync.h"
  #include "main/performance.h"
  #include "main/splash.gen.h"
  #include "main/splash_editor.gen.h"
  #include "main/tests/test_main.h"
  #include "modules/register_module_types.h"
  #include "platform/register_platform_apis.h"
  #include "scene/debugger/script_debugger_remote.h"
  #include "scene/main/scene_tree.h"
  #include "scene/main/viewport.h"
  #include "scene/register_scene_types.h"
  #include "scene/resources/packed_scene.h"
  #include "servers/arvr_server.h"
  #include "servers/audio_server.h"
  #include "servers/camera_server.h"
  #include "servers/physics_2d_server.h"
  #include "servers/physics_server.h"
  #include "servers/register_server_types.h"
  
  #ifdef TOOLS_ENABLED
  #include "editor/doc/doc_data.h"
  #include "editor/doc/doc_data_class_path.gen.h"
  #include "editor/editor_node.h"
  #include "editor/editor_settings.h"
  #include "editor/progress_dialog.h"
  #include "editor/project_manager.h"
  #endif
  
  /* Static members */
  
  // Singletons
  
  // Initialized in setup()
  static Engine *engine = NULL;
  static ProjectSettings *globals = NULL;
  static InputMap *input_map = NULL;
  static TranslationServer *translation_server = NULL;
  static Performance *performance = NULL;
  static PackedData *packed_data = NULL;
  #ifdef MINIZIP_ENABLED
  static ZipArchive *zip_packed_data = NULL;
  #endif
  static FileAccessNetworkClient *file_access_network_client = NULL;
  static ScriptDebugger *script_debugger = NULL;
  static MessageQueue *message_queue = NULL;
  
  // Initialized in setup2()
  static AudioServer *audio_server = NULL;
  static CameraServer *camera_server = NULL;
  static ARVRServer *arvr_server = NULL;
  static PhysicsServer *physics_server = NULL;
  static Physics2DServer *physics_2d_server = NULL;
  // We error out if setup2() doesn't turn this true
  static bool _start_success = false;
  
  // Drivers
  
  static int video_driver_idx = -1;
  static int audio_driver_idx = -1;
  
  // Engine config/tools
  
  static bool editor = false;
  static bool project_manager = false;
  static String locale;
  static bool show_help = false;
  static bool auto_quit = false;
  static OS::ProcessID allow_focus_steal_pid = 0;
  #ifdef TOOLS_ENABLED
  static bool auto_build_solutions = false;
  #endif
  
  // Display
  
  static OS::VideoMode video_mode;
  static int init_screen = -1;
  static bool init_fullscreen = false;
  static bool init_maximized = false;
  static bool init_windowed = false;
  static bool init_always_on_top = false;
  static bool init_use_custom_pos = false;
  static Vector2 init_custom_pos;
  static bool force_lowdpi = false;
  
  // Debug
  
  static bool use_debug_profiler = false;
  #ifdef DEBUG_ENABLED
  static bool debug_collisions = false;
  static bool debug_navigation = false;
  #endif
  static int frame_delay = 0;
  static bool disable_render_loop = false;
  static int fixed_fps = -1;
  static bool print_fps = false;
  
  /* Helper methods */
  
  // Used by Mono module, should likely be registered in Engine singleton instead
  // FIXME: This is also not 100% accurate, `project_manager` is only true when it was requested,
  // but not if e.g. we fail to load and project and fallback to the manager.
  bool Main::is_project_manager() {
  	return project_manager;
  }
  
  static String unescape_cmdline(const String &p_str) {
  	return p_str.replace("%20", " ");
  }
  
  static String get_full_version_string() {
  	String hash = String(VERSION_HASH);
  	if (hash.length() != 0)
  		hash = "." + hash.left(9);
  	return String(VERSION_FULL_BUILD) + hash;
  }
  
  // FIXME: Could maybe be moved to PhysicsServerManager and Physics2DServerManager directly
  // to have less code in main.cpp.
  void initialize_physics() {
  	/// 3D Physics Server
  	physics_server = PhysicsServerManager::new_server(ProjectSettings::get_singleton()->get(PhysicsServerManager::setting_property_name));
  	if (!physics_server) {
  		// Physics server not found, Use the default physics
  		physics_server = PhysicsServerManager::new_default_server();
  	}
  	ERR_FAIL_COND(!physics_server);
  	physics_server->init();
  
  	/// 2D Physics server
  	physics_2d_server = Physics2DServerManager::new_server(ProjectSettings::get_singleton()->get(Physics2DServerManager::setting_property_name));
  	if (!physics_2d_server) {
  		// Physics server not found, Use the default physics
  		physics_2d_server = Physics2DServerManager::new_default_server();
  	}
  	ERR_FAIL_COND(!physics_2d_server);
  	physics_2d_server->init();
  }
  
  void finalize_physics() {
  	physics_server->finish();
  	memdelete(physics_server);
  
  	physics_2d_server->finish();
  	memdelete(physics_2d_server);
  }
  
  //#define DEBUG_INIT
  #ifdef DEBUG_INIT
  #define MAIN_PRINT(m_txt) print_line(m_txt)
  #else
  #define MAIN_PRINT(m_txt)
  #endif
  
  void Main::print_help(const char *p_binary) {
  
  	print_line(String(VERSION_NAME) + " v" + get_full_version_string() + " - " + String(VERSION_WEBSITE));
  	OS::get_singleton()->print("Free and open source software under the terms of the MIT license.\n");
  	OS::get_singleton()->print("(c) 2007-2020 Juan Linietsky, Ariel Manzur.\n");
  	OS::get_singleton()->print("(c) 2014-2020 Godot Engine contributors.\n");
  	OS::get_singleton()->print("\n");
  	OS::get_singleton()->print("Usage: %s [options] [path to scene or 'project.godot' file]\n", p_binary);
  	OS::get_singleton()->print("\n");
  
  	OS::get_singleton()->print("General options:\n");
  	OS::get_singleton()->print("  -h, --help                       Display this help message.\n");
  	OS::get_singleton()->print("  --version                        Display the version string.\n");
  	OS::get_singleton()->print("  -v, --verbose                    Use verbose stdout mode.\n");
  	OS::get_singleton()->print("  --quiet                          Quiet mode, silences stdout messages. Errors are still displayed.\n");
  	OS::get_singleton()->print("\n");
  
  	OS::get_singleton()->print("Run options:\n");
  #ifdef TOOLS_ENABLED
  	OS::get_singleton()->print("  -e, --editor                     Start the editor instead of running the scene.\n");
  	OS::get_singleton()->print("  -p, --project-manager            Start the project manager, even if a project is auto-detected.\n");
  #endif
  	OS::get_singleton()->print("  -q, --quit                       Quit after the first iteration.\n");
  	OS::get_singleton()->print("  -l, --language <locale>          Use a specific locale (<locale> being a two-letter code).\n");
  	OS::get_singleton()->print("  --path <directory>               Path to a project (<directory> must contain a 'project.godot' file).\n");
  	OS::get_singleton()->print("  -u, --upwards                    Scan folders upwards for project.godot file.\n");
  	OS::get_singleton()->print("  --main-pack <file>               Path to a pack (.pck) file to load.\n");
  	OS::get_singleton()->print("  --render-thread <mode>           Render thread mode ('unsafe', 'safe', 'separate').\n");
  	OS::get_singleton()->print("  --remote-fs <address>            Remote filesystem (<host/IP>[:<port>] address).\n");
  	OS::get_singleton()->print("  --remote-fs-password <password>  Password for remote filesystem.\n");
  	OS::get_singleton()->print("  --audio-driver <driver>          Audio driver (");
  	for (int i = 0; i < OS::get_singleton()->get_audio_driver_count(); i++) {
  		if (i != 0)
  			OS::get_singleton()->print(", ");
  		OS::get_singleton()->print("'%s'", OS::get_singleton()->get_audio_driver_name(i));
  	}
  	OS::get_singleton()->print(").\n");
  	OS::get_singleton()->print("  --video-driver <driver>          Video driver (");
  	for (int i = 0; i < OS::get_singleton()->get_video_driver_count(); i++) {
  		if (i != 0)
  			OS::get_singleton()->print(", ");
  		OS::get_singleton()->print("'%s'", OS::get_singleton()->get_video_driver_name(i));
  	}
  	OS::get_singleton()->print(").\n");
  	OS::get_singleton()->print("\n");
  
  #ifndef SERVER_ENABLED
  	OS::get_singleton()->print("Display options:\n");
  	OS::get_singleton()->print("  -f, --fullscreen                 Request fullscreen mode.\n");
  	OS::get_singleton()->print("  -m, --maximized                  Request a maximized window.\n");
  	OS::get_singleton()->print("  -w, --windowed                   Request windowed mode.\n");
  	OS::get_singleton()->print("  -t, --always-on-top              Request an always-on-top window.\n");
  	OS::get_singleton()->print("  --resolution <W>x<H>             Request window resolution.\n");
  	OS::get_singleton()->print("  --position <X>,<Y>               Request window position.\n");
  	OS::get_singleton()->print("  --low-dpi                        Force low-DPI mode (macOS and Windows only).\n");
  	OS::get_singleton()->print("  --no-window                      Run with invisible window. Useful together with --script.\n");
  	OS::get_singleton()->print("  --enable-vsync-via-compositor    When vsync is enabled, vsync via the OS' window compositor (Windows only).\n");
  	OS::get_singleton()->print("  --disable-vsync-via-compositor   Disable vsync via the OS' window compositor (Windows only).\n");
  	OS::get_singleton()->print("  --tablet-driver                  Tablet input driver (");
  	for (int i = 0; i < OS::get_singleton()->get_tablet_driver_count(); i++) {
  		if (i != 0)
  			OS::get_singleton()->print(", ");
  		OS::get_singleton()->print("'%s'", OS::get_singleton()->get_tablet_driver_name(i).utf8().get_data());
  	}
  	OS::get_singleton()->print(") (Windows only).\n");
  	OS::get_singleton()->print("\n");
  #endif
  
  	OS::get_singleton()->print("Debug options:\n");
  	OS::get_singleton()->print("  -d, --debug                      Debug (local stdout debugger).\n");
  	OS::get_singleton()->print("  -b, --breakpoints                Breakpoint list as source::line comma-separated pairs, no spaces (use %%20 instead).\n");
  	OS::get_singleton()->print("  --profiling                      Enable profiling in the script debugger.\n");
  	OS::get_singleton()->print("  --remote-debug <address>         Remote debug (<host/IP>:<port> address).\n");
  #if defined(DEBUG_ENABLED) && !defined(SERVER_ENABLED)
  	OS::get_singleton()->print("  --debug-collisions               Show collision shapes when running the scene.\n");
  	OS::get_singleton()->print("  --debug-navigation               Show navigation polygons when running the scene.\n");
  #endif
  	OS::get_singleton()->print("  --frame-delay <ms>               Simulate high CPU load (delay each frame by <ms> milliseconds).\n");
  	OS::get_singleton()->print("  --time-scale <scale>             Force time scale (higher values are faster, 1.0 is normal speed).\n");
  	OS::get_singleton()->print("  --disable-render-loop            Disable render loop so rendering only occurs when called explicitly from script.\n");
  	OS::get_singleton()->print("  --disable-crash-handler          Disable crash handler when supported by the platform code.\n");
  	OS::get_singleton()->print("  --fixed-fps <fps>                Force a fixed number of frames per second. This setting disables real-time synchronization.\n");
  	OS::get_singleton()->print("  --print-fps                      Print the frames per second to the stdout.\n");
  	OS::get_singleton()->print("\n");
  
  	OS::get_singleton()->print("Standalone tools:\n");
  	OS::get_singleton()->print("  -s, --script <script>            Run a script.\n");
  	OS::get_singleton()->print("  --check-only                     Only parse for errors and quit (use with --script).\n");
  #ifdef TOOLS_ENABLED
  	OS::get_singleton()->print("  --export <preset> <path>         Export the project using the given preset and matching release template. The preset name should match one defined in export_presets.cfg.\n");
  	OS::get_singleton()->print("                                   <path> should be absolute or relative to the project directory, and include the filename for the binary (e.g. 'builds/game.exe'). The target directory should exist.\n");
  	OS::get_singleton()->print("  --export-debug <preset> <path>   Same as --export, but using the debug template.\n");
  	OS::get_singleton()->print("  --export-pack <preset> <path>    Same as --export, but only export the game pack for the given preset. The <path> extension determines whether it will be in PCK or ZIP format.\n");
  	OS::get_singleton()->print("  --doctool <path>                 Dump the engine API reference to the given <path> in XML format, merging if existing files are found.\n");
  	OS::get_singleton()->print("  --no-docbase                     Disallow dumping the base types (used with --doctool).\n");
  	OS::get_singleton()->print("  --build-solutions                Build the scripting solutions (e.g. for C# projects). Implies --editor and requires a valid project to edit.\n");
  #ifdef DEBUG_METHODS_ENABLED
  	OS::get_singleton()->print("  --gdnative-generate-json-api     Generate JSON dump of the Godot API for GDNative bindings.\n");
  #endif
  	OS::get_singleton()->print("  --test <test>                    Run a unit test (");
  	const char **test_names = tests_get_names();
  	const char *comma = "";
  	while (*test_names) {
  		OS::get_singleton()->print("%s'%s'", comma, *test_names);
  		test_names++;
  		comma = ", ";
  	}
  	OS::get_singleton()->print(").\n");
  #endif
  }
  
  /* Engine initialization
   *
   * Consists of several methods that are called by each platform's specific main(argc, argv).
   * To fully understand engine init, one should therefore start from the platform's main and
   * see how it calls into the Main class' methods.
   *
   * The initialization is typically done in 3 steps (with the setup2 step triggered either
   * automatically by setup, or manually in the platform's main).
   *
   * - setup(execpath, argc, argv, p_second_phase) is the main entry point for all platforms,
   *   responsible for the initialization of all low level singletons and core types, and parsing
   *   command line arguments to configure things accordingly.
   *   If p_second_phase is true, it will chain into setup2() (default behaviour). This is
   *   disabled on some platforms (Android, iOS, UWP) which trigger the second step in their
   *   own time.
   *
   * - setup2(p_main_tid_override) registers high level servers and singletons, displays the
   *   boot splash, then registers higher level types (scene, editor, etc.).
   *
   * - start() is the last step and that's where command line tools can run, or the main loop
   *   can be created eventually and the project settings put into action. That's also where
   *   the editor node is created, if relevant.
   *   start() does it own argument parsing for a subset of the command line arguments described
   *   in help, it's a bit messy and should be globalized with the setup() parsing somehow.
   */
  
  Error Main::setup(const char *execpath, int argc, char *argv[], bool p_second_phase) {
  	RID_OwnerBase::init_rid();
  
  	OS::get_singleton()->initialize_core();
  
  	engine = memnew(Engine);
  
  	ClassDB::init();
  
  	MAIN_PRINT("Main: Initialize CORE");
  
  	register_core_types();
  	register_core_driver_types();
  
  	MAIN_PRINT("Main: Initialize Globals");
  
  	Thread::_main_thread_id = Thread::get_caller_id();
  
  	globals = memnew(ProjectSettings);
  	input_map = memnew(InputMap);
  
  	register_core_settings(); //here globals is present
  
  	translation_server = memnew(TranslationServer);
  	performance = memnew(Performance);
  	ClassDB::register_class<Performance>();
  	engine->add_singleton(Engine::Singleton("Performance", performance));
  
  	GLOBAL_DEF("debug/settings/crash_handler/message", String("Please include this when reporting the bug on https://github.com/godotengine/godot/issues"));
  
  	MAIN_PRINT("Main: Parse CMDLine");
  
  	/* argument parsing and main creation */
  	List<String> args;
  	List<String> main_args;
  
  	for (int i = 0; i < argc; i++) {
  
  		args.push_back(String::utf8(argv[i]));
  	}
  
  	List<String>::Element *I = args.front();
  
  	I = args.front();
  
  	while (I) {
  
  		I->get() = unescape_cmdline(I->get().strip_edges());
  		I = I->next();
  	}
  
  	I = args.front();
  
  	String video_driver = "";
  	String audio_driver = "";
  	String tablet_driver = "";
  	String project_path = ".";
  	bool upwards = false;
  	String debug_mode;
  	String debug_host;
  	bool skip_breakpoints = false;
  	String main_pack;
  	bool quiet_stdout = false;
  	int rtm = -1;
  
  	String remotefs;
  	String remotefs_pass;
  
  	Vector<String> breakpoints;
  	bool use_custom_res = true;
  	bool force_res = false;
  	bool saw_vsync_via_compositor_override = false;
  #ifdef TOOLS_ENABLED
  	bool found_project = false;
  #endif
  
  	packed_data = PackedData::get_singleton();
  	if (!packed_data)
  		packed_data = memnew(PackedData);
  
  #ifdef MINIZIP_ENABLED
  
  	//XXX: always get_singleton() == 0x0
  	zip_packed_data = ZipArchive::get_singleton();
  	//TODO: remove this temporary fix
  	if (!zip_packed_data) {
  		zip_packed_data = memnew(ZipArchive);
  	}
  
  	packed_data->add_pack_source(zip_packed_data);
  #endif
  
  	I = args.front();
  	while (I) {
  #ifdef OSX_ENABLED
  		// Ignore the process serial number argument passed by macOS Gatekeeper.
  		// Otherwise, Godot would try to open a non-existent project on the first start and abort.
  		if (I->get().begins_with("-psn_")) {
  			I = I->next();
  			continue;
  		}
  #endif
  
  		List<String>::Element *N = I->next();
  
  		if (I->get() == "-h" || I->get() == "--help" || I->get() == "/?") { // display help
  
  			show_help = true;
  			goto error;
  
  		} else if (I->get() == "--version") {
  
  			print_line(get_full_version_string());
  			goto error;
  
  		} else if (I->get() == "-v" || I->get() == "--verbose") { // verbose output
  
  			OS::get_singleton()->_verbose_stdout = true;
  		} else if (I->get() == "--quiet") { // quieter output
  
  			quiet_stdout = true;
  
  		} else if (I->get() == "--audio-driver") { // audio driver
  
  			if (I->next()) {
  
  				audio_driver = I->next()->get();
  
  				bool found = false;
  				for (int i = 0; i < OS::get_singleton()->get_audio_driver_count(); i++) {
  					if (audio_driver == OS::get_singleton()->get_audio_driver_name(i)) {
  						found = true;
  					}
  				}
  
  				if (!found) {
  					OS::get_singleton()->print("Unknown audio driver '%s', aborting.\nValid options are ", audio_driver.utf8().get_data());
  
  					for (int i = 0; i < OS::get_singleton()->get_audio_driver_count(); i++) {
  						if (i == OS::get_singleton()->get_audio_driver_count() - 1) {
  							OS::get_singleton()->print(" and ");
  						} else if (i != 0) {
  							OS::get_singleton()->print(", ");
  						}
  
  						OS::get_singleton()->print("'%s'", OS::get_singleton()->get_audio_driver_name(i));
  					}
  
  					OS::get_singleton()->print(".\n");
  
  					goto error;
  				}
  
  				N = I->next()->next();
  			} else {
  				OS::get_singleton()->print("Missing audio driver argument, aborting.\n");
  				goto error;
  			}
  
  		} else if (I->get() == "--video-driver") { // force video driver
  
  			if (I->next()) {
  
  				video_driver = I->next()->get();
  
  				bool found = false;
  				for (int i = 0; i < OS::get_singleton()->get_video_driver_count(); i++) {
  					if (video_driver == OS::get_singleton()->get_video_driver_name(i)) {
  						found = true;
  					}
  				}
  
  				if (!found) {
  					OS::get_singleton()->print("Unknown video driver '%s', aborting.\nValid options are ", video_driver.utf8().get_data());
  
  					for (int i = 0; i < OS::get_singleton()->get_video_driver_count(); i++) {
  						if (i == OS::get_singleton()->get_video_driver_count() - 1) {
  							OS::get_singleton()->print(" and ");
  						} else if (i != 0) {
  							OS::get_singleton()->print(", ");
  						}
  
  						OS::get_singleton()->print("'%s'", OS::get_singleton()->get_video_driver_name(i));
  					}
  
  					OS::get_singleton()->print(".\n");
  
  					goto error;
  				}
  
  				N = I->next()->next();
  			} else {
  				OS::get_singleton()->print("Missing video driver argument, aborting.\n");
  				goto error;
  			}
  #ifndef SERVER_ENABLED
  		} else if (I->get() == "-f" || I->get() == "--fullscreen") { // force fullscreen
  
  			init_fullscreen = true;
  		} else if (I->get() == "-m" || I->get() == "--maximized") { // force maximized window
  
  			init_maximized = true;
  			video_mode.maximized = true;
  
  		} else if (I->get() == "-w" || I->get() == "--windowed") { // force windowed window
  
  			init_windowed = true;
  		} else if (I->get() == "-t" || I->get() == "--always-on-top") { // force always-on-top window
  
  			init_always_on_top = true;
  		} else if (I->get() == "--resolution") { // force resolution
  
  			if (I->next()) {
  
  				String vm = I->next()->get();
  
  				if (vm.find("x") == -1) { // invalid parameter format
  
  					OS::get_singleton()->print("Invalid resolution '%s', it should be e.g. '1280x720'.\n", vm.utf8().get_data());
  					goto error;
  				}
  
  				int w = vm.get_slice("x", 0).to_int();
  				int h = vm.get_slice("x", 1).to_int();
  
  				if (w <= 0 || h <= 0) {
  
  					OS::get_singleton()->print("Invalid resolution '%s', width and height must be above 0.\n", vm.utf8().get_data());
  					goto error;
  				}
  
  				video_mode.width = w;
  				video_mode.height = h;
  				force_res = true;
  
  				N = I->next()->next();
  			} else {
  				OS::get_singleton()->print("Missing resolution argument, aborting.\n");
  				goto error;
  			}
  
  		} else if (I->get() == "--position") { // set window position
  
  			if (I->next()) {
  
  				String vm = I->next()->get();
  
  				if (vm.find(",") == -1) { // invalid parameter format
  
  					OS::get_singleton()->print("Invalid position '%s', it should be e.g. '80,128'.\n", vm.utf8().get_data());
  					goto error;
  				}
  
  				int x = vm.get_slice(",", 0).to_int();
  				int y = vm.get_slice(",", 1).to_int();
  
  				init_custom_pos = Point2(x, y);
  				init_use_custom_pos = true;
  
  				N = I->next()->next();
  			} else {
  				OS::get_singleton()->print("Missing position argument, aborting.\n");
  				goto error;
  			}
  
  		} else if (I->get() == "--low-dpi") { // force low DPI (macOS only)
  
  			force_lowdpi = true;
  		} else if (I->get() == "--no-window") { // run with an invisible window
  
  			OS::get_singleton()->set_no_window_mode(true);
  		} else if (I->get() == "--tablet-driver") {
  			if (I->next()) {
  				tablet_driver = I->next()->get();
  				bool found = false;
  				for (int i = 0; i < OS::get_singleton()->get_tablet_driver_count(); i++) {
  					if (tablet_driver == OS::get_singleton()->get_tablet_driver_name(i)) {
  						found = true;
  					}
  				}
  
  				if (!found) {
  					OS::get_singleton()->print("Unknown tablet driver '%s', aborting.\n", tablet_driver.utf8().get_data());
  					goto error;
  				}
  
  				N = I->next()->next();
  			} else {
  				OS::get_singleton()->print("Missing tablet driver argument, aborting.\n");
  				goto error;
  			}
  		} else if (I->get() == "--enable-vsync-via-compositor") {
  
  			video_mode.vsync_via_compositor = true;
  			saw_vsync_via_compositor_override = true;
  		} else if (I->get() == "--disable-vsync-via-compositor") {
  
  			video_mode.vsync_via_compositor = false;
  			saw_vsync_via_compositor_override = true;
  #endif
  		} else if (I->get() == "--profiling") { // enable profiling
  
  			use_debug_profiler = true;
  
  		} else if (I->get() == "-l" || I->get() == "--language") { // language
  
  			if (I->next()) {
  
  				locale = I->next()->get();
  				N = I->next()->next();
  			} else {
  				OS::get_singleton()->print("Missing language argument, aborting.\n");
  				goto error;
  			}
  
  		} else if (I->get() == "--remote-fs") { // remote filesystem
  
  			if (I->next()) {
  
  				remotefs = I->next()->get();
  				N = I->next()->next();
  			} else {
  				OS::get_singleton()->print("Missing remote filesystem address, aborting.\n");
  				goto error;
  			}
  		} else if (I->get() == "--remote-fs-password") { // remote filesystem password
  
  			if (I->next()) {
  
  				remotefs_pass = I->next()->get();
  				N = I->next()->next();
  			} else {
  				OS::get_singleton()->print("Missing remote filesystem password, aborting.\n");
  				goto error;
  			}
  		} else if (I->get() == "--render-thread") { // render thread mode
  
  			if (I->next()) {
  
  				if (I->next()->get() == "safe")
  					rtm = OS::RENDER_THREAD_SAFE;
  				else if (I->next()->get() == "unsafe")
  					rtm = OS::RENDER_THREAD_UNSAFE;
  				else if (I->next()->get() == "separate")
  					rtm = OS::RENDER_SEPARATE_THREAD;
  
  				N = I->next()->next();
  			} else {
  				OS::get_singleton()->print("Missing render thread mode argument, aborting.\n");
  				goto error;
  			}
  #ifdef TOOLS_ENABLED
  		} else if (I->get() == "-e" || I->get() == "--editor") { // starts editor
  
  			editor = true;
  		} else if (I->get() == "-p" || I->get() == "--project-manager") { // starts project manager
  
  			project_manager = true;
  		} else if (I->get() == "--build-solutions") { // Build the scripting solution such C#
  
  			auto_build_solutions = true;
  			editor = true;
  #ifdef DEBUG_METHODS_ENABLED
  		} else if (I->get() == "--gdnative-generate-json-api") {
  			// Register as an editor instance to use the GLES2 fallback automatically on hardware that doesn't support the GLES3 backend
  			editor = true;
  
  			// We still pass it to the main arguments since the argument handling itself is not done in this function
  			main_args.push_back(I->get());
  #endif
  		} else if (I->get() == "--export" || I->get() == "--export-debug" || I->get() == "--export-pack") { // Export project
  
  			editor = true;
  			main_args.push_back(I->get());
  #endif
  		} else if (I->get() == "--path") { // set path of project to start or edit
  
  			if (I->next()) {
  
  				String p = I->next()->get();
  				if (OS::get_singleton()->set_cwd(p) == OK) {
  					//nothing
  				} else {
  					project_path = I->next()->get(); //use project_path instead
  				}
  				N = I->next()->next();
  			} else {
  				OS::get_singleton()->print("Missing relative or absolute path, aborting.\n");
  				goto error;
  			}
  		} else if (I->get() == "-u" || I->get() == "--upwards") { // scan folders upwards
  			upwards = true;
  		} else if (I->get() == "-q" || I->get() == "--quit") { // Auto quit at the end of the first main loop iteration
  			auto_quit = true;
  		} else if (I->get().ends_with("project.godot")) {
  			String path;
  			String file = I->get();
  			int sep = MAX(file.find_last("/"), file.find_last("\\"));
  			if (sep == -1)
  				path = ".";
  			else {
  				path = file.substr(0, sep);
  			}
  			if (OS::get_singleton()->set_cwd(path) == OK) {
  				// path already specified, don't override
  			} else {
  				project_path = path;
  			}
  #ifdef TOOLS_ENABLED
  			editor = true;
  #endif
  		} else if (I->get() == "-b" || I->get() == "--breakpoints") { // add breakpoints
  
  			if (I->next()) {
  
  				String bplist = I->next()->get();
  				breakpoints = bplist.split(",");
  				N = I->next()->next();
  			} else {
  				OS::get_singleton()->print("Missing list of breakpoints, aborting.\n");
  				goto error;
  			}
  
  		} else if (I->get() == "--frame-delay") { // force frame delay
  
  			if (I->next()) {
  
  				frame_delay = I->next()->get().to_int();
  				N = I->next()->next();
  			} else {
  				OS::get_singleton()->print("Missing frame delay argument, aborting.\n");
  				goto error;
  			}
  
  		} else if (I->get() == "--time-scale") { // force time scale
  
  			if (I->next()) {
  
  				Engine::get_singleton()->set_time_scale(I->next()->get().to_double());
  				N = I->next()->next();
  			} else {
  				OS::get_singleton()->print("Missing time scale argument, aborting.\n");
  				goto error;
  			}
  
  		} else if (I->get() == "--main-pack") {
  
  			if (I->next()) {
  
  				main_pack = I->next()->get();
  				N = I->next()->next();
  			} else {
  				OS::get_singleton()->print("Missing path to main pack file, aborting.\n");
  				goto error;
  			};
  
  		} else if (I->get() == "-d" || I->get() == "--debug") {
  			debug_mode = "local";
  			OS::get_singleton()->_debug_stdout = true;
  #if defined(DEBUG_ENABLED) && !defined(SERVER_ENABLED)
  		} else if (I->get() == "--debug-collisions") {
  			debug_collisions = true;
  		} else if (I->get() == "--debug-navigation") {
  			debug_navigation = true;
  #endif
  		} else if (I->get() == "--remote-debug") {
  			if (I->next()) {
  
  				debug_mode = "remote";
  				debug_host = I->next()->get();
  				if (debug_host.find(":") == -1) { // wrong address
  					OS::get_singleton()->print("Invalid debug host address, it should be of the form <host/IP>:<port>.\n");
  					goto error;
  				}
  				N = I->next()->next();
  			} else {
  				OS::get_singleton()->print("Missing remote debug host address, aborting.\n");
  				goto error;
  			}
  		} else if (I->get() == "--allow_focus_steal_pid") { // not exposed to user
  			if (I->next()) {
  
  				allow_focus_steal_pid = I->next()->get().to_int64();
  				N = I->next()->next();
  			} else {
  				OS::get_singleton()->print("Missing editor PID argument, aborting.\n");
  				goto error;
  			}
  		} else if (I->get() == "--disable-render-loop") {
  			disable_render_loop = true;
  		} else if (I->get() == "--fixed-fps") {
  			if (I->next()) {
  				fixed_fps = I->next()->get().to_int();
  				N = I->next()->next();
  			} else {
  				OS::get_singleton()->print("Missing fixed-fps argument, aborting.\n");
  				goto error;
  			}
  		} else if (I->get() == "--print-fps") {
  			print_fps = true;
  		} else if (I->get() == "--disable-crash-handler") {
  			OS::get_singleton()->disable_crash_handler();
  		} else if (I->get() == "--skip-breakpoints") {
  			skip_breakpoints = true;
  		} else {
  			main_args.push_back(I->get());
  		}
  
  		I = N;
  	}
  
  #ifdef TOOLS_ENABLED
  	if (editor && project_manager) {
  		OS::get_singleton()->print("Error: Command line arguments implied opening both editor and project manager, which is not possible. Aborting.\n");
  		goto error;
  	}
  #endif
  
  	// Network file system needs to be configured before globals, since globals are based on the
  	// 'project.godot' file which will only be available through the network if this is enabled
  	FileAccessNetwork::configure();
  	if (remotefs != "") {
  
  		file_access_network_client = memnew(FileAccessNetworkClient);
  		int port;
  		if (remotefs.find(":") != -1) {
  			port = remotefs.get_slicec(':', 1).to_int();
  			remotefs = remotefs.get_slicec(':', 0);
  		} else {
  			port = 6010;
  		}
  
  		Error err = file_access_network_client->connect(remotefs, port, remotefs_pass);
  		if (err) {
  			OS::get_singleton()->printerr("Could not connect to remotefs: %s:%i.\n", remotefs.utf8().get_data(), port);
  			goto error;
  		}
  
  		FileAccess::make_default<FileAccessNetwork>(FileAccess::ACCESS_RESOURCES);
  	}
  
  	if (globals->setup(project_path, main_pack, upwards) == OK) {
  #ifdef TOOLS_ENABLED
  		found_project = true;
  #endif
  	} else {
  
  #ifdef TOOLS_ENABLED
  		editor = false;
  #else
  		const String error_msg = "Error: Couldn't load project data at path \"" + project_path + "\". Is the .pck file missing?\nIf you've renamed the executable, the associated .pck file should also be renamed to match the executable's name (without the extension).\n";
  		OS::get_singleton()->print("%s", error_msg.ascii().get_data());
  		OS::get_singleton()->alert(error_msg);
  
  		goto error;
  #endif
  	}
  
  	GLOBAL_DEF("memory/limits/multithreaded_server/rid_pool_prealloc", 60);
  	ProjectSettings::get_singleton()->set_custom_property_info("memory/limits/multithreaded_server/rid_pool_prealloc", PropertyInfo(Variant::INT, "memory/limits/multithreaded_server/rid_pool_prealloc", PROPERTY_HINT_RANGE, "0,500,1")); // No negative and limit to 500 due to crashes
  	GLOBAL_DEF("network/limits/debugger_stdout/max_chars_per_second", 2048);
  	ProjectSettings::get_singleton()->set_custom_property_info("network/limits/debugger_stdout/max_chars_per_second", PropertyInfo(Variant::INT, "network/limits/debugger_stdout/max_chars_per_second", PROPERTY_HINT_RANGE, "0, 4096, 1, or_greater"));
  	GLOBAL_DEF("network/limits/debugger_stdout/max_messages_per_frame", 10);
  	ProjectSettings::get_singleton()->set_custom_property_info("network/limits/debugger_stdout/max_messages_per_frame", PropertyInfo(Variant::INT, "network/limits/debugger_stdout/max_messages_per_frame", PROPERTY_HINT_RANGE, "0, 20, 1, or_greater"));
  	GLOBAL_DEF("network/limits/debugger_stdout/max_errors_per_second", 100);
  	ProjectSettings::get_singleton()->set_custom_property_info("network/limits/debugger_stdout/max_errors_per_second", PropertyInfo(Variant::INT, "network/limits/debugger_stdout/max_errors_per_second", PROPERTY_HINT_RANGE, "0, 200, 1, or_greater"));
  	GLOBAL_DEF("network/limits/debugger_stdout/max_warnings_per_second", 100);
  	ProjectSettings::get_singleton()->set_custom_property_info("network/limits/debugger_stdout/max_warnings_per_second", PropertyInfo(Variant::INT, "network/limits/debugger_stdout/max_warnings_per_second", PROPERTY_HINT_RANGE, "0, 200, 1, or_greater"));
  
  	if (debug_mode == "remote") {
  
  		ScriptDebuggerRemote *sdr = memnew(ScriptDebuggerRemote);
  		uint16_t debug_port = 6007;
  		if (debug_host.find(":") != -1) {
  			int sep_pos = debug_host.find_last(":");
  			debug_port = debug_host.substr(sep_pos + 1, debug_host.length()).to_int();
  			debug_host = debug_host.substr(0, sep_pos);
  		}
  		Error derr = sdr->connect_to_host(debug_host, debug_port);
  
  		sdr->set_skip_breakpoints(skip_breakpoints);
  
  		if (derr != OK) {
  			memdelete(sdr);
  		} else {
  			script_debugger = sdr;
  			sdr->set_allow_focus_steal_pid(allow_focus_steal_pid);
  		}
  	} else if (debug_mode == "local") {
  
  		script_debugger = memnew(ScriptDebuggerLocal);
  		OS::get_singleton()->initialize_debugging();
  	}
  	if (script_debugger) {
  		//there is a debugger, parse breakpoints
  
  		for (int i = 0; i < breakpoints.size(); i++) {
  
  			String bp = breakpoints[i];
  			int sp = bp.find_last(":");
  			ERR_CONTINUE_MSG(sp == -1, "Invalid breakpoint: '" + bp + "', expected file:line format.");
  
  			script_debugger->insert_breakpoint(bp.substr(sp + 1, bp.length()).to_int(), bp.substr(0, sp));
  		}
  	}
  
  #ifdef TOOLS_ENABLED
  	if (editor) {
  		packed_data->set_disabled(true);
  		globals->set_disable_feature_overrides(true);
  	}
  
  #endif
  
  #ifdef TOOLS_ENABLED
  	if (editor) {
  		Engine::get_singleton()->set_editor_hint(true);
  		main_args.push_back("--editor");
  		if (!init_windowed) {
  			init_maximized = true;
  			video_mode.maximized = true;
  		}
  	}
  
  	if (!project_manager && !editor) {
  		// Determine if the project manager should be requested
  		project_manager = main_args.size() == 0 && !found_project;
  	}
  #endif
  
  	GLOBAL_DEF("logging/file_logging/enable_file_logging", false);
  	// Only file logging by default on desktop platforms as logs can't be
  	// accessed easily on mobile/Web platforms (if at all).
  	// This also prevents logs from being created for the editor instance, as feature tags
  	// are disabled while in the editor (even if they should logically apply).
  	GLOBAL_DEF("logging/file_logging/enable_file_logging.pc", true);
  	GLOBAL_DEF("logging/file_logging/log_path", "user://logs/godot.log");
  	GLOBAL_DEF("logging/file_logging/max_log_files", 5);
  	ProjectSettings::get_singleton()->set_custom_property_info("logging/file_logging/max_log_files", PropertyInfo(Variant::INT, "logging/file_logging/max_log_files", PROPERTY_HINT_RANGE, "0,20,1,or_greater")); //no negative numbers
  	if (!project_manager && !editor && FileAccess::get_create_func(FileAccess::ACCESS_USERDATA) && GLOBAL_GET("logging/file_logging/enable_file_logging")) {
  		// Don't create logs for the project manager as they would be written to
  		// the current working directory, which is inconvenient.
  		String base_path = GLOBAL_GET("logging/file_logging/log_path");
  		int max_files = GLOBAL_GET("logging/file_logging/max_log_files");
  		OS::get_singleton()->add_logger(memnew(RotatedFileLogger(base_path, max_files)));
  	}
  
  	if (main_args.size() == 0 && String(GLOBAL_DEF("application/run/main_scene", "")) == "") {
  #ifdef TOOLS_ENABLED
  		if (!editor && !project_manager) {
  #endif
  			OS::get_singleton()->print("Error: Can't run project: no main scene defined.\n");
  			goto error;
  #ifdef TOOLS_ENABLED
  		}
  #endif
  	}
  
  	if (editor || project_manager) {
  		Engine::get_singleton()->set_editor_hint(true);
  		use_custom_res = false;
  		input_map->load_default(); //keys for editor
  	} else {
  		input_map->load_from_globals(); //keys for game
  	}
  
  	if (bool(ProjectSettings::get_singleton()->get("application/run/disable_stdout"))) {
  		quiet_stdout = true;
  	}
  	if (bool(ProjectSettings::get_singleton()->get("application/run/disable_stderr"))) {
  		_print_error_enabled = false;
  	};
  
  	if (quiet_stdout)
  		_print_line_enabled = false;
  
  	OS::get_singleton()->set_cmdline(execpath, main_args);
  
  	GLOBAL_DEF("rendering/quality/driver/driver_name", "GLES3");
  	ProjectSettings::get_singleton()->set_custom_property_info("rendering/quality/driver/driver_name", PropertyInfo(Variant::STRING, "rendering/quality/driver/driver_name", PROPERTY_HINT_ENUM, "GLES2,GLES3"));
  	if (video_driver == "") {
  		video_driver = GLOBAL_GET("rendering/quality/driver/driver_name");
  	}
  
  	GLOBAL_DEF("rendering/quality/driver/fallback_to_gles2", false);
  
  	// Assigning here, to be sure that it appears in docs
  	GLOBAL_DEF("rendering/quality/2d/use_nvidia_rect_flicker_workaround", false);
  
  	GLOBAL_DEF("display/window/size/width", 1024);
  	ProjectSettings::get_singleton()->set_custom_property_info("display/window/size/width", PropertyInfo(Variant::INT, "display/window/size/width", PROPERTY_HINT_RANGE, "0,7680,or_greater")); // 8K resolution
  	GLOBAL_DEF("display/window/size/height", 600);
  	ProjectSettings::get_singleton()->set_custom_property_info("display/window/size/height", PropertyInfo(Variant::INT, "display/window/size/height", PROPERTY_HINT_RANGE, "0,4320,or_greater")); // 8K resolution
  	GLOBAL_DEF("display/window/size/resizable", true);
  	GLOBAL_DEF("display/window/size/borderless", false);
  	GLOBAL_DEF("display/window/size/fullscreen", false);
  	GLOBAL_DEF("display/window/size/always_on_top", false);
  	GLOBAL_DEF("display/window/size/test_width", 0);
  	ProjectSettings::get_singleton()->set_custom_property_info("display/window/size/test_width", PropertyInfo(Variant::INT, "display/window/size/test_width", PROPERTY_HINT_RANGE, "0,7680,or_greater")); // 8K resolution
  	GLOBAL_DEF("display/window/size/test_height", 0);
  	ProjectSettings::get_singleton()->set_custom_property_info("display/window/size/test_height", PropertyInfo(Variant::INT, "display/window/size/test_height", PROPERTY_HINT_RANGE, "0,4320,or_greater")); // 8K resolution
  
  	if (use_custom_res) {
  
  		if (!force_res) {
  			video_mode.width = GLOBAL_GET("display/window/size/width");
  			video_mode.height = GLOBAL_GET("display/window/size/height");
  
  			if (globals->has_setting("display/window/size/test_width") && globals->has_setting("display/window/size/test_height")) {
  
  				int tw = globals->get("display/window/size/test_width");
  				if (tw > 0) {
  					video_mode.width = tw;
  				}
  				int th = globals->get("display/window/size/test_height");
  				if (th > 0) {
  					video_mode.height = th;
  				}
  			}
  		}
  
  		video_mode.resizable = GLOBAL_GET("display/window/size/resizable");
  		video_mode.borderless_window = GLOBAL_GET("display/window/size/borderless");
  		video_mode.fullscreen = GLOBAL_GET("display/window/size/fullscreen");
  		video_mode.always_on_top = GLOBAL_GET("display/window/size/always_on_top");
  	}
  
  	if (!force_lowdpi) {
  		OS::get_singleton()->_allow_hidpi = GLOBAL_DEF("display/window/dpi/allow_hidpi", false);
  	}
  
  	video_mode.use_vsync = GLOBAL_DEF_RST("display/window/vsync/use_vsync", true);
  	OS::get_singleton()->_use_vsync = video_mode.use_vsync;
  
  	if (!saw_vsync_via_compositor_override) {
  		// If one of the command line options to enable/disable vsync via the
  		// window compositor ("--enable-vsync-via-compositor" or
  		// "--disable-vsync-via-compositor") was present then it overrides the
  		// project setting.
  		video_mode.vsync_via_compositor = GLOBAL_DEF("display/window/vsync/vsync_via_compositor", false);
  	}
  
  	OS::get_singleton()->_vsync_via_compositor = video_mode.vsync_via_compositor;
  
  	if (tablet_driver == "") { // specified in project.godot
  		tablet_driver = GLOBAL_DEF_RST("display/window/tablet_driver", OS::get_singleton()->get_tablet_driver_name(0));
  	}
  
  	for (int i = 0; i < OS::get_singleton()->get_tablet_driver_count(); i++) {
  		if (tablet_driver == OS::get_singleton()->get_tablet_driver_name(i)) {
  			OS::get_singleton()->set_current_tablet_driver(OS::get_singleton()->get_tablet_driver_name(i));
  			break;
  		}
  	}
  
  	if (tablet_driver == "") {
  		OS::get_singleton()->set_current_tablet_driver(OS::get_singleton()->get_tablet_driver_name(0));
  	}
  
  	OS::get_singleton()->_allow_layered = GLOBAL_DEF("display/window/per_pixel_transparency/allowed", false);
  	video_mode.layered = GLOBAL_DEF("display/window/per_pixel_transparency/enabled", false);
  
  	GLOBAL_DEF("rendering/quality/intended_usage/framebuffer_allocation", 2);
  	GLOBAL_DEF("rendering/quality/intended_usage/framebuffer_allocation.mobile", 3);
  
  	if (editor || project_manager) {
  		// The editor and project manager always detect and use hiDPI if needed
  		OS::get_singleton()->_allow_hidpi = true;
  		OS::get_singleton()->_allow_layered = false;
  	}
  
  	Engine::get_singleton()->_pixel_snap = GLOBAL_DEF("rendering/quality/2d/use_pixel_snap", false);
  	Engine::get_singleton()->_snap_2d_transforms = GLOBAL_DEF("rendering/quality/2d/use_transform_snap", false);
  	OS::get_singleton()->_keep_screen_on = GLOBAL_DEF("display/window/energy_saving/keep_screen_on", true);
  	if (rtm == -1) {
  		rtm = GLOBAL_DEF("rendering/threads/thread_model", OS::RENDER_THREAD_SAFE);
  	}
  
  	if (rtm >= 0 && rtm < 3) {
  #ifdef NO_THREADS
  		rtm = OS::RENDER_THREAD_UNSAFE; // No threads available on this platform.
  #else
  		if (editor) {
  			rtm = OS::RENDER_THREAD_SAFE;
  		}
  #endif
  		OS::get_singleton()->_render_thread_mode = OS::RenderThreadMode(rtm);
  	}
  
  	/* Determine audio and video drivers */
  
  	for (int i = 0; i < OS::get_singleton()->get_video_driver_count(); i++) {
  
  		if (video_driver == OS::get_singleton()->get_video_driver_name(i)) {
  
  			video_driver_idx = i;
  			break;
  		}
  	}
  
  	if (video_driver_idx < 0) {
  		video_driver_idx = 0;
  	}
  
  	if (audio_driver == "") { // specified in project.godot
  		audio_driver = GLOBAL_DEF_RST("audio/driver", OS::get_singleton()->get_audio_driver_name(0));
  	}
  
  	for (int i = 0; i < OS::get_singleton()->get_audio_driver_count(); i++) {
  
  		if (audio_driver == OS::get_singleton()->get_audio_driver_name(i)) {
  
  			audio_driver_idx = i;
  			break;
  		}
  	}
  
  	if (audio_driver_idx < 0) {
  		audio_driver_idx = 0;
  	}
  
  	{
  		String orientation = GLOBAL_DEF("display/window/handheld/orientation", "landscape");
  
  		if (orientation == "portrait")
  			OS::get_singleton()->set_screen_orientation(OS::SCREEN_PORTRAIT);
  		else if (orientation == "reverse_landscape")
  			OS::get_singleton()->set_screen_orientation(OS::SCREEN_REVERSE_LANDSCAPE);
  		else if (orientation == "reverse_portrait")
  			OS::get_singleton()->set_screen_orientation(OS::SCREEN_REVERSE_PORTRAIT);
  		else if (orientation == "sensor_landscape")
  			OS::get_singleton()->set_screen_orientation(OS::SCREEN_SENSOR_LANDSCAPE);
  		else if (orientation == "sensor_portrait")
  			OS::get_singleton()->set_screen_orientation(OS::SCREEN_SENSOR_PORTRAIT);
  		else if (orientation == "sensor")
  			OS::get_singleton()->set_screen_orientation(OS::SCREEN_SENSOR);
  		else
  			OS::get_singleton()->set_screen_orientation(OS::SCREEN_LANDSCAPE);
  	}
  
  	Engine::get_singleton()->set_iterations_per_second(GLOBAL_DEF("physics/common/physics_fps", 60));
  	ProjectSettings::get_singleton()->set_custom_property_info("physics/common/physics_fps", PropertyInfo(Variant::INT, "physics/common/physics_fps", PROPERTY_HINT_RANGE, "1,120,1,or_greater"));
  	Engine::get_singleton()->set_physics_jitter_fix(GLOBAL_DEF("physics/common/physics_jitter_fix", 0.5));
  	Engine::get_singleton()->set_target_fps(GLOBAL_DEF("debug/settings/fps/force_fps", 0));
  	ProjectSettings::get_singleton()->set_custom_property_info("debug/settings/fps/force_fps", PropertyInfo(Variant::INT, "debug/settings/fps/force_fps", PROPERTY_HINT_RANGE, "0,120,1,or_greater"));
  
  	GLOBAL_DEF("debug/settings/stdout/print_fps", false);
  	GLOBAL_DEF("debug/settings/stdout/verbose_stdout", false);
  
  	if (!OS::get_singleton()->_verbose_stdout) { // Not manually overridden.
  		OS::get_singleton()->_verbose_stdout = GLOBAL_GET("debug/settings/stdout/verbose_stdout");
  	}
  
  	if (frame_delay == 0) {
  		frame_delay = GLOBAL_DEF("application/run/frame_delay_msec", 0);
  		ProjectSettings::get_singleton()->set_custom_property_info("application/run/frame_delay_msec", PropertyInfo(Variant::INT, "application/run/frame_delay_msec", PROPERTY_HINT_RANGE, "0,100,1,or_greater")); // No negative numbers
  	}
  
  	OS::get_singleton()->set_low_processor_usage_mode(GLOBAL_DEF("application/run/low_processor_mode", false));
  	OS::get_singleton()->set_low_processor_usage_mode_sleep_usec(GLOBAL_DEF("application/run/low_processor_mode_sleep_usec", 6900)); // Roughly 144 FPS
  	ProjectSettings::get_singleton()->set_custom_property_info("application/run/low_processor_mode_sleep_usec", PropertyInfo(Variant::INT, "application/run/low_processor_mode_sleep_usec", PROPERTY_HINT_RANGE, "0,33200,1,or_greater")); // No negative numbers
  
  	GLOBAL_DEF("display/window/ios/hide_home_indicator", true);
  	GLOBAL_DEF("input_devices/pointing/ios/touch_delay", 0.150);
  
  	Engine::get_singleton()->set_frame_delay(frame_delay);
  
  	message_queue = memnew(MessageQueue);
  
  	if (p_second_phase)
  		return setup2();
  
  	return OK;
  
  error:
  
  	video_driver = "";
  	audio_driver = "";
  	tablet_driver = "";
  	project_path = "";
  
  	args.clear();
  	main_args.clear();
  
  	if (show_help)
  		print_help(execpath);
  
  	if (performance)
  		memdelete(performance);
  	if (input_map)
  		memdelete(input_map);
  	if (translation_server)
  		memdelete(translation_server);
  	if (globals)
  		memdelete(globals);
  	if (engine)
  		memdelete(engine);
  	if (script_debugger)
  		memdelete(script_debugger);
  	if (packed_data)
  		memdelete(packed_data);
  	if (file_access_network_client)
  		memdelete(file_access_network_client);
  
  	unregister_core_driver_types();
  	unregister_core_types();
  
  	OS::get_singleton()->_cmdline.clear();
  
  	if (message_queue)
  		memdelete(message_queue);
  	OS::get_singleton()->finalize_core();
  	locale = String();
  
  	return ERR_INVALID_PARAMETER;
  }
  
  Error Main::setup2(Thread::ID p_main_tid_override) {
  
  	// Print engine name and version
  	print_line(String(VERSION_NAME) + " v" + get_full_version_string() + " - " + String(VERSION_WEBSITE));
  
  	if (p_main_tid_override) {
  		Thread::_main_thread_id = p_main_tid_override;
  	}
  
  	Error err = OS::get_singleton()->initialize(video_mode, video_driver_idx, audio_driver_idx);
  	if (err != OK) {
  		return err;
  	}
  
  	print_line(" "); //add a blank line for readability
  
  	if (init_use_custom_pos) {
  		OS::get_singleton()->set_window_position(init_custom_pos);
  	}
  
  	// right moment to create and initialize the audio server
  
  	audio_server = memnew(AudioServer);
  	audio_server->init();
  
  	// also init our arvr_server from here
  	arvr_server = memnew(ARVRServer);
  
  	// and finally setup this property under visual_server
  	VisualServer::get_singleton()->set_render_loop_enabled(!disable_render_loop);
  
  	register_core_singletons();
  
  	MAIN_PRINT("Main: Setup Logo");
  
  #ifdef JAVASCRIPT_ENABLED
  	bool show_logo = false;
  #else
  	bool show_logo = true;
  #endif
  
  	if (init_screen != -1) {
  		OS::get_singleton()->set_current_screen(init_screen);
  	}
  	if (init_windowed) {
  		//do none..
  	} else if (init_maximized) {
  		OS::get_singleton()->set_window_maximized(true);
  	} else if (init_fullscreen) {
  		OS::get_singleton()->set_window_fullscreen(true);
  	}
  	if (init_always_on_top) {
  		OS::get_singleton()->set_window_always_on_top(true);
  	}
  
  	register_server_types();
  
  	MAIN_PRINT("Main: Load Remaps");
  
  	Color clear = GLOBAL_DEF("rendering/environment/default_clear_color", Color(0.3, 0.3, 0.3));
  	VisualServer::get_singleton()->set_default_clear_color(clear);
  
  	if (show_logo) { //boot logo!
  		String boot_logo_path = GLOBAL_DEF("application/boot_splash/image", String());
  		bool boot_logo_scale = GLOBAL_DEF("application/boot_splash/fullsize", true);
  		bool boot_logo_filter = GLOBAL_DEF("application/boot_splash/use_filter", true);
  		ProjectSettings::get_singleton()->set_custom_property_info("application/boot_splash/image", PropertyInfo(Variant::STRING, "application/boot_splash/image", PROPERTY_HINT_FILE, "*.png"));
  
  		Ref<Image> boot_logo;
  
  		boot_logo_path = boot_logo_path.strip_edges();
  
  		if (boot_logo_path != String()) {
  			boot_logo.instance();
  			Error load_err = ImageLoader::load_image(boot_logo_path, boot_logo);
  			if (load_err)
  				ERR_PRINTS("Non-existing or invalid boot splash at '" + boot_logo_path + "'. Loading default splash.");
  		}
  
  		Color boot_bg_color = GLOBAL_DEF("application/boot_splash/bg_color", boot_splash_bg_color);
  		if (boot_logo.is_valid()) {
  			OS::get_singleton()->_msec_splash = OS::get_singleton()->get_ticks_msec();
  			VisualServer::get_singleton()->set_boot_image(boot_logo, boot_bg_color, boot_logo_scale, boot_logo_filter);
  
  		} else {
  #ifndef NO_DEFAULT_BOOT_LOGO
  			MAIN_PRINT("Main: Create bootsplash");
  #if defined(TOOLS_ENABLED) && !defined(NO_EDITOR_SPLASH)
  			Ref<Image> splash = (editor || project_manager) ? memnew(Image(boot_splash_editor_png)) : memnew(Image(boot_splash_png));
  #else
  			Ref<Image> splash = memnew(Image(boot_splash_png));
  #endif
  
  			MAIN_PRINT("Main: ClearColor");
  			VisualServer::get_singleton()->set_default_clear_color(boot_bg_color);
  			MAIN_PRINT("Main: Image");
  			VisualServer::get_singleton()->set_boot_image(splash, boot_bg_color, false);
  #endif
  		}
  
  #ifdef TOOLS_ENABLED
  		Ref<Image> icon = memnew(Image(app_icon_png));
  		OS::get_singleton()->set_icon(icon);
  #endif
  	}
  
  	MAIN_PRINT("Main: DCC");
  	VisualServer::get_singleton()->set_default_clear_color(GLOBAL_DEF("rendering/environment/default_clear_color", Color(0.3, 0.3, 0.3)));
  	MAIN_PRINT("Main: END");
  
  	GLOBAL_DEF("application/config/icon", String());
  	ProjectSettings::get_singleton()->set_custom_property_info("application/config/icon",
  			PropertyInfo(Variant::STRING, "application/config/icon",
  					PROPERTY_HINT_FILE, "*.png,*.webp,*.svg,*.svgz"));
  
  	GLOBAL_DEF("application/config/macos_native_icon", String());
  	ProjectSettings::get_singleton()->set_custom_property_info("application/config/macos_native_icon", PropertyInfo(Variant::STRING, "application/config/macos_native_icon", PROPERTY_HINT_FILE, "*.icns"));
  
  	GLOBAL_DEF("application/config/windows_native_icon", String());
  	ProjectSettings::get_singleton()->set_custom_property_info("application/config/windows_native_icon", PropertyInfo(Variant::STRING, "application/config/windows_native_icon", PROPERTY_HINT_FILE, "*.ico"));
  
  	InputDefault *id = Object::cast_to<InputDefault>(Input::get_singleton());
  	if (id) {
  		if (bool(GLOBAL_DEF("input_devices/pointing/emulate_touch_from_mouse", false)) && !(editor || project_manager)) {
  			if (!OS::get_singleton()->has_touchscreen_ui_hint()) {
  				//only if no touchscreen ui hint, set emulation
  				id->set_emulate_touch_from_mouse(true);
  			}
  		}
  
  		id->set_emulate_mouse_from_touch(bool(GLOBAL_DEF("input_devices/pointing/emulate_mouse_from_touch", true)));
  	}
  
  	MAIN_PRINT("Main: Load Remaps");
  
  	MAIN_PRINT("Main: Load Scene Types");
  
  	register_scene_types();
  
  	GLOBAL_DEF("display/mouse_cursor/custom_image", String());
  	GLOBAL_DEF("display/mouse_cursor/custom_image_hotspot", Vector2());
  	GLOBAL_DEF("display/mouse_cursor/tooltip_position_offset", Point2(10, 10));
  	ProjectSettings::get_singleton()->set_custom_property_info("display/mouse_cursor/custom_image", PropertyInfo(Variant::STRING, "display/mouse_cursor/custom_image", PROPERTY_HINT_FILE, "*.png,*.webp"));
  
  	if (String(ProjectSettings::get_singleton()->get("display/mouse_cursor/custom_image")) != String()) {
  
  		Ref<Texture> cursor = ResourceLoader::load(ProjectSettings::get_singleton()->get("display/mouse_cursor/custom_image"));
  		if (cursor.is_valid()) {
  			Vector2 hotspot = ProjectSettings::get_singleton()->get("display/mouse_cursor/custom_image_hotspot");
  			Input::get_singleton()->set_custom_mouse_cursor(cursor, Input::CURSOR_ARROW, hotspot);
  		}
  	}
  #ifdef TOOLS_ENABLED
  	ClassDB::set_current_api(ClassDB::API_EDITOR);
  	EditorNode::register_editor_types();
  
  	ClassDB::set_current_api(ClassDB::API_CORE);
  
  #endif
  
  	MAIN_PRINT("Main: Load Modules, Physics, Drivers, Scripts");
  
  	register_platform_apis();
  	register_module_types();
  
  	camera_server = CameraServer::create();
  
  	initialize_physics();
  	register_server_singletons();
  
  	register_driver_types();
  
  	// This loads global classes, so it must happen before custom loaders and savers are registered
  	ScriptServer::init_languages();
  
  	MAIN_PRINT("Main: Load Translations");
  
  	translation_server->setup(); //register translations, load them, etc.
  	if (locale != "") {
  
  		translation_server->set_locale(locale);
  	}
  	translation_server->load_translations();
  	ResourceLoader::load_translation_remaps(); //load remaps for resources
  
  	ResourceLoader::load_path_remaps();
  
  	audio_server->load_default_bus_layout();
  
  	if (use_debug_profiler && script_debugger) {
  		script_debugger->profiling_start();
  	}
  	_start_success = true;
  	locale = String();
  
  	ClassDB::set_current_api(ClassDB::API_NONE); //no more api is registered at this point
  
  	print_verbose("CORE API HASH: " + uitos(ClassDB::get_api_hash(ClassDB::API_CORE)));
  	print_verbose("EDITOR API HASH: " + uitos(ClassDB::get_api_hash(ClassDB::API_EDITOR)));
  	MAIN_PRINT("Main: Done");
  
  	return OK;
  }
  
  // everything the main loop needs to know about frame timings
  static MainTimerSync main_timer_sync;
  
  bool Main::start() {
  
  	ERR_FAIL_COND_V(!_start_success, false);
  
  	bool hasicon = false;
  	String doc_tool;
  	List<String> removal_docs;
  	String positional_arg;
  	String game_path;
  	String script;
  	String test;
  	bool check_only = false;
  
  #ifdef TOOLS_ENABLED
  	bool doc_base = true;
  	String _export_preset;
  	bool export_debug = false;
  	bool export_pack_only = false;
  #endif
  
  	main_timer_sync.init(OS::get_singleton()->get_ticks_usec());
  
  	List<String> args = OS::get_singleton()->get_cmdline_args();
  	for (int i = 0; i < args.size(); i++) {
  		//parameters that do not have an argument to the right
  		if (args[i] == "--check-only") {
  			check_only = true;
  #ifdef TOOLS_ENABLED
  		} else if (args[i] == "--no-docbase") {
  			doc_base = false;
  		} else if (args[i] == "-e" || args[i] == "--editor") {
  			editor = true;
  		} else if (args[i] == "-p" || args[i] == "--project-manager") {
  			project_manager = true;
  #endif
  		} else if (args[i].length() && args[i][0] != '-' && positional_arg == "") {
  			positional_arg = args[i];
  
  			if (args[i].ends_with(".scn") ||
  					args[i].ends_with(".tscn") ||
  					args[i].ends_with(".escn") ||
  					args[i].ends_with(".res") ||
  					args[i].ends_with(".tres")) {
  				// Only consider the positional argument to be a scene path if it ends with
  				// a file extension associated with Godot scenes. This makes it possible
  				// for projects to parse command-line arguments for custom CLI arguments
  				// or other file extensions without trouble. This can be used to implement
  				// "drag-and-drop onto executable" logic, which can prove helpful
  				// for non-game applications.
  				game_path = args[i];
  			}
  		}
  		//parameters that have an argument to the right
  		else if (i < (args.size() - 1)) {
  			bool parsed_pair = true;
  			if (args[i] == "-s" || args[i] == "--script") {
  				script = args[i + 1];
  			} else if (args[i] == "--test") {
  				test = args[i + 1];
  #ifdef TOOLS_ENABLED
  			} else if (args[i] == "--doctool") {
  				doc_tool = args[i + 1];
  				for (int j = i + 2; j < args.size(); j++)
  					removal_docs.push_back(args[j]);
  			} else if (args[i] == "--export") {
  				editor = true; //needs editor
  				_export_preset = args[i + 1];
  			} else if (args[i] == "--export-debug") {
  				editor = true; //needs editor
  				_export_preset = args[i + 1];
  				export_debug = true;
  			} else if (args[i] == "--export-pack") {
  				editor = true;
  				_export_preset = args[i + 1];
  				export_pack_only = true;
  #endif
  			} else {
  				// The parameter does not match anything known, don't skip the next argument
  				parsed_pair = false;
  			}
  			if (parsed_pair) {
  				i++;
  			}
  		}
  	}
  
  	String main_loop_type;
  #ifdef TOOLS_ENABLED
  	if (doc_tool != "") {
  
  		Engine::get_singleton()->set_editor_hint(true); // Needed to instance editor-only classes for their default values
  
  		{
  			DirAccessRef da = DirAccess::open(doc_tool);
  			ERR_FAIL_COND_V_MSG(!da, false, "Argument supplied to --doctool must be a base Godot build directory.");
  		}
  		DocData doc;
  		doc.generate(doc_base);
  
  		DocData docsrc;
  		Map<String, String> doc_data_classes;
  		Set<String> checked_paths;
  		print_line("Loading docs...");
  
  		for (int i = 0; i < _doc_data_class_path_count; i++) {
  			// Custom modules are always located by absolute path.
  			String path = _doc_data_class_paths[i].path;
  			if (path.is_rel_path()) {
  				path = doc_tool.plus_file(path);
  			}
  			String name = _doc_data_class_paths[i].name;
  			doc_data_classes[name] = path;
  			if (!checked_paths.has(path)) {
  				checked_paths.insert(path);
  
  				// Create the module documentation directory if it doesn't exist
  				DirAccess *da = DirAccess::create_for_path(path);
  				da->make_dir_recursive(path);
  				memdelete(da);
  
  				docsrc.load_classes(path);
  				print_line("Loading docs from: " + path);
  			}
  		}
  
  		String index_path = doc_tool.plus_file("doc/classes");
  		// Create the main documentation directory if it doesn't exist
  		DirAccess *da = DirAccess::create_for_path(index_path);
  		da->make_dir_recursive(index_path);
  		memdelete(da);
  
  		docsrc.load_classes(index_path);
  		checked_paths.insert(index_path);
  		print_line("Loading docs from: " + index_path);
  
  		print_line("Merging docs...");
  		doc.merge_from(docsrc);
  		for (Set<String>::Element *E = checked_paths.front(); E; E = E->next()) {
  			print_line("Erasing old docs at: " + E->get());
  			DocData::erase_classes(E->get());
  		}
  
  		print_line("Generating new docs...");
  		doc.save_classes(index_path, doc_data_classes);
  
  		return false;
  	}
  
  #endif
  
  	if (script == "" && game_path == "" && String(GLOBAL_DEF("application/run/main_scene", "")) != "") {
  		game_path = GLOBAL_DEF("application/run/main_scene", "");
  	}
  
  	MainLoop *main_loop = NULL;
  	if (editor) {
  		main_loop = memnew(SceneTree);
  	};
  
  	if (test != "") {
  #ifdef TOOLS_ENABLED
  		main_loop = test_main(test, args);
  
  		if (!main_loop)
  			return false;
  #endif
  
  	} else if (script != "") {
  
  		Ref<Script> script_res = ResourceLoader::load(script);
  		ERR_FAIL_COND_V_MSG(script_res.is_null(), false, "Can't load script: " + script);
  
  		if (check_only) {
  			if (!script_res->is_valid()) {
  				OS::get_singleton()->set_exit_code(1);
  			}
  			return false;
  		}
  
  		if (script_res->can_instance()) {
  
  			StringName instance_type = script_res->get_instance_base_type();
  			Object *obj = ClassDB::instance(instance_type);
  			MainLoop *script_loop = Object::cast_to<MainLoop>(obj);
  			if (!script_loop) {
  				if (obj)
  					memdelete(obj);
  				ERR_FAIL_V_MSG(false, vformat("Can't load the script \"%s\" as it doesn't inherit from SceneTree or MainLoop.", script));
  			}
  
  			script_loop->set_init_script(script_res);
  			main_loop = script_loop;
  		} else {
  
  			return false;
  		}
  
  	} else {
  		main_loop_type = GLOBAL_DEF("application/run/main_loop_type", "");
  	}
  
  	if (!main_loop && main_loop_type == "")
  		main_loop_type = "SceneTree";
  
  	if (!main_loop) {
  		if (!ClassDB::class_exists(main_loop_type)) {
  			OS::get_singleton()->alert("Error: MainLoop type doesn't exist: " + main_loop_type);
  			return false;
  		} else {
  
  			Object *ml = ClassDB::instance(main_loop_type);
  			ERR_FAIL_COND_V_MSG(!ml, false, "Can't instance MainLoop type.");
  
  			main_loop = Object::cast_to<MainLoop>(ml);
  			if (!main_loop) {
  
  				memdelete(ml);
  				ERR_FAIL_V_MSG(false, "Invalid MainLoop type.");
  			}
  		}
  	}
  
  	if (main_loop->is_class("SceneTree")) {
  
  		SceneTree *sml = Object::cast_to<SceneTree>(main_loop);
  
  #ifdef DEBUG_ENABLED
  		if (debug_collisions) {
  			sml->set_debug_collisions_hint(true);
  		}
  		if (debug_navigation) {
  			sml->set_debug_navigation_hint(true);
  		}
  #endif
  
  		ResourceLoader::add_custom_loaders();
  		ResourceSaver::add_custom_savers();
  
  		if (!project_manager && !editor) { // game
  			if (game_path != "" || script != "") {
  				if (script_debugger && script_debugger->is_remote()) {
  					ScriptDebuggerRemote *remote_debugger = static_cast<ScriptDebuggerRemote *>(script_debugger);
  
  					remote_debugger->set_scene_tree(sml);
  				}
  
  				//autoload
  				List<PropertyInfo> props;
  				ProjectSettings::get_singleton()->get_property_list(&props);
  
  				//first pass, add the constants so they exist before any script is loaded
  				for (List<PropertyInfo>::Element *E = props.front(); E; E = E->next()) {
  
  					String s = E->get().name;
  					if (!s.begins_with("autoload/"))
  						continue;
  					String name = s.get_slicec('/', 1);
  					String path = ProjectSettings::get_singleton()->get(s);
  					bool global_var = false;
  					if (path.begins_with("*")) {
  						global_var = true;
  					}
  
  					if (global_var) {
  						for (int i = 0; i < ScriptServer::get_language_count(); i++) {
  							ScriptServer::get_language(i)->add_global_constant(name, Variant());
  						}
  					}
  				}
  
  				//second pass, load into global constants
  				List<Node *> to_add;
  				for (List<PropertyInfo>::Element *E = props.front(); E; E = E->next()) {
  
  					String s = E->get().name;
  					if (!s.begins_with("autoload/"))
  						continue;
  					String name = s.get_slicec('/', 1);
  					String path = ProjectSettings::get_singleton()->get(s);
  					bool global_var = false;
  					if (path.begins_with("*")) {
  						global_var = true;
  						path = path.substr(1, path.length() - 1);
  					}
  
  					RES res = ResourceLoader::load(path);
  					ERR_CONTINUE_MSG(res.is_null(), "Can't autoload: " + path);
  					Node *n = NULL;
  					if (res->is_class("PackedScene")) {
  						Ref<PackedScene> ps = res;
  						n = ps->instance();
  					} else if (res->is_class("Script")) {
  						Ref<Script> script_res = res;
  						StringName ibt = script_res->get_instance_base_type();
  						bool valid_type = ClassDB::is_parent_class(ibt, "Node");
  						ERR_CONTINUE_MSG(!valid_type, "Script does not inherit a Node: " + path);
  
  						Object *obj = ClassDB::instance(ibt);
  
  						ERR_CONTINUE_MSG(obj == NULL, "Cannot instance script for autoload, expected 'Node' inheritance, got: " + String(ibt));
  
  						n = Object::cast_to<Node>(obj);
  						n->set_script(script_res.get_ref_ptr());
  					}
  
  					ERR_CONTINUE_MSG(!n, "Path in autoload not a node or script: " + path);
  					n->set_name(name);
  
  					//defer so references are all valid on _ready()
  					to_add.push_back(n);
  
  					if (global_var) {
  						for (int i = 0; i < ScriptServer::get_language_count(); i++) {
  							ScriptServer::get_language(i)->add_global_constant(name, n);
  						}
  					}
  				}
  
  				for (List<Node *>::Element *E = to_add.front(); E; E = E->next()) {
  
  					sml->get_root()->add_child(E->get());
  				}
  			}
  		}
  
  #ifdef TOOLS_ENABLED
  		EditorNode *editor_node = NULL;
  		if (editor) {
  			editor_node = memnew(EditorNode);
  			sml->get_root()->add_child(editor_node);
  
  			if (_export_preset != "") {
  				editor_node->export_preset(_export_preset, positional_arg, export_debug, export_pack_only);
  				game_path = ""; // Do not load anything.
  			}
  		}
  #endif
  
  		if (!editor && !project_manager) {
  			//standard helpers that can be changed from main config
  
  			String stretch_mode = GLOBAL_DEF("display/window/stretch/mode", "disabled");
  			String stretch_aspect = GLOBAL_DEF("display/window/stretch/aspect", "ignore");
  			Size2i stretch_size = Size2(GLOBAL_DEF("display/window/size/width", 0), GLOBAL_DEF("display/window/size/height", 0));
  			real_t stretch_shrink = GLOBAL_DEF("display/window/stretch/shrink", 1.0);
  
  			SceneTree::StretchMode sml_sm = SceneTree::STRETCH_MODE_DISABLED;
  			if (stretch_mode == "2d")
  				sml_sm = SceneTree::STRETCH_MODE_2D;
  			else if (stretch_mode == "viewport")
  				sml_sm = SceneTree::STRETCH_MODE_VIEWPORT;
  
  			SceneTree::StretchAspect sml_aspect = SceneTree::STRETCH_ASPECT_IGNORE;
  			if (stretch_aspect == "keep")
  				sml_aspect = SceneTree::STRETCH_ASPECT_KEEP;
  			else if (stretch_aspect == "keep_width")
  				sml_aspect = SceneTree::STRETCH_ASPECT_KEEP_WIDTH;
  			else if (stretch_aspect == "keep_height")
  				sml_aspect = SceneTree::STRETCH_ASPECT_KEEP_HEIGHT;
  			else if (stretch_aspect == "expand")
  				sml_aspect = SceneTree::STRETCH_ASPECT_EXPAND;
  
  			sml->set_screen_stretch(sml_sm, sml_aspect, stretch_size, stretch_shrink);
  
  			sml->set_auto_accept_quit(GLOBAL_DEF("application/config/auto_accept_quit", true));
  			sml->set_quit_on_go_back(GLOBAL_DEF("application/config/quit_on_go_back", true));
  			String appname = ProjectSettings::get_singleton()->get("application/config/name");
  			appname = TranslationServer::get_singleton()->translate(appname);
  #ifdef DEBUG_ENABLED
  			// Append a suffix to the window title to denote that the project is running
  			// from a debug build (including the editor). Since this results in lower performance,
  			// this should be clearly presented to the user.
  			OS::get_singleton()->set_window_title(vformat("%s (DEBUG)", appname));
  #else
  			OS::get_singleton()->set_window_title(appname);
  #endif
  
  			int shadow_atlas_size = GLOBAL_GET("rendering/quality/shadow_atlas/size");
  			int shadow_atlas_q0_subdiv = GLOBAL_GET("rendering/quality/shadow_atlas/quadrant_0_subdiv");
  			int shadow_atlas_q1_subdiv = GLOBAL_GET("rendering/quality/shadow_atlas/quadrant_1_subdiv");
  			int shadow_atlas_q2_subdiv = GLOBAL_GET("rendering/quality/shadow_atlas/quadrant_2_subdiv");
  			int shadow_atlas_q3_subdiv = GLOBAL_GET("rendering/quality/shadow_atlas/quadrant_3_subdiv");
  
  			sml->get_root()->set_shadow_atlas_size(shadow_atlas_size);
  			sml->get_root()->set_shadow_atlas_quadrant_subdiv(0, Viewport::ShadowAtlasQuadrantSubdiv(shadow_atlas_q0_subdiv));
  			sml->get_root()->set_shadow_atlas_quadrant_subdiv(1, Viewport::ShadowAtlasQuadrantSubdiv(shadow_atlas_q1_subdiv));
  			sml->get_root()->set_shadow_atlas_quadrant_subdiv(2, Viewport::ShadowAtlasQuadrantSubdiv(shadow_atlas_q2_subdiv));
  			sml->get_root()->set_shadow_atlas_quadrant_subdiv(3, Viewport::ShadowAtlasQuadrantSubdiv(shadow_atlas_q3_subdiv));
  			Viewport::Usage usage = Viewport::Usage(int(GLOBAL_GET("rendering/quality/intended_usage/framebuffer_allocation")));
  			sml->get_root()->set_usage(usage);
  
  			bool snap_controls = GLOBAL_DEF("gui/common/snap_controls_to_pixels", true);
  			sml->get_root()->set_snap_controls_to_pixels(snap_controls);
  
  			bool font_oversampling = GLOBAL_DEF("rendering/quality/dynamic_fonts/use_oversampling", true);
  			sml->set_use_font_oversampling(font_oversampling);
  
  		} else {
  
  			GLOBAL_DEF("display/window/stretch/mode", "disabled");
  			ProjectSettings::get_singleton()->set_custom_property_info("display/window/stretch/mode", PropertyInfo(Variant::STRING, "display/window/stretch/mode", PROPERTY_HINT_ENUM, "disabled,2d,viewport"));
  			GLOBAL_DEF("display/window/stretch/aspect", "ignore");
  			ProjectSettings::get_singleton()->set_custom_property_info("display/window/stretch/aspect", PropertyInfo(Variant::STRING, "display/window/stretch/aspect", PROPERTY_HINT_ENUM, "ignore,keep,keep_width,keep_height,expand"));
  			GLOBAL_DEF("display/window/stretch/shrink", 1.0);
  			ProjectSettings::get_singleton()->set_custom_property_info("display/window/stretch/shrink", PropertyInfo(Variant::REAL, "display/window/stretch/shrink", PROPERTY_HINT_RANGE, "1.0,8.0,0.1"));
  			sml->set_auto_accept_quit(GLOBAL_DEF("application/config/auto_accept_quit", true));
  			sml->set_quit_on_go_back(GLOBAL_DEF("application/config/quit_on_go_back", true));
  			GLOBAL_DEF("gui/common/snap_controls_to_pixels", true);
  			GLOBAL_DEF("rendering/quality/dynamic_fonts/use_oversampling", true);
  		}
  
  		String local_game_path;
  		if (game_path != "" && !project_manager) {
  
  			local_game_path = game_path.replace("\\", "/");
  
  			if (!local_game_path.begins_with("res://")) {
  				bool absolute = (local_game_path.size() > 1) && (local_game_path[0] == '/' || local_game_path[1] == ':');
  
  				if (!absolute) {
  
  					if (ProjectSettings::get_singleton()->is_using_datapack()) {
  
  						local_game_path = "res://" + local_game_path;
  
  					} else {
  						int sep = local_game_path.find_last("/");
  
  						if (sep == -1) {
  							DirAccess *da = DirAccess::create(DirAccess::ACCESS_FILESYSTEM);
  							local_game_path = da->get_current_dir().plus_file(local_game_path);
  							memdelete(da);
  						} else {
  
  							DirAccess *da = DirAccess::open(local_game_path.substr(0, sep));
  							if (da) {
  								local_game_path = da->get_current_dir().plus_file(local_game_path.substr(sep + 1, local_game_path.length()));
  								memdelete(da);
  							}
  						}
  					}
  				}
  			}
  
  			local_game_path = ProjectSettings::get_singleton()->localize_path(local_game_path);
  
  #ifdef TOOLS_ENABLED
  			if (editor) {
  
  				if (game_path != GLOBAL_GET("application/run/main_scene") || !editor_node->has_scenes_in_session()) {
  					Error serr = editor_node->load_scene(local_game_path);
  					if (serr != OK)
  						ERR_PRINT("Failed to load scene");
  				}
  				OS::get_singleton()->set_context(OS::CONTEXT_EDITOR);
  			}
  #endif
  			if (!editor) {
  				OS::get_singleton()->set_context(OS::CONTEXT_ENGINE);
  			}
  		}
  
  		if (!project_manager && !editor) { // game
  
  			// Load SSL Certificates from Project Settings (or builtin).
  			Crypto::load_default_certificates(GLOBAL_DEF("network/ssl/certificates", ""));
  
  			if (game_path != "") {
  				Node *scene = NULL;
  				Ref<PackedScene> scenedata = ResourceLoader::load(local_game_path);
  				if (scenedata.is_valid())
  					scene = scenedata->instance();
  
  				ERR_FAIL_COND_V_MSG(!scene, false, "Failed loading scene: " + local_game_path);
  				sml->add_current_scene(scene);
  
  #ifdef OSX_ENABLED
  				String mac_iconpath = GLOBAL_DEF("application/config/macos_native_icon", "Variant()");
  				if (mac_iconpath != "") {
  					OS::get_singleton()->set_native_icon(mac_iconpath);
  					hasicon = true;
  				}
  #endif
  
  #ifdef WINDOWS_ENABLED
  				String win_iconpath = GLOBAL_DEF("application/config/windows_native_icon", "Variant()");
  				if (win_iconpath != "") {
  					OS::get_singleton()->set_native_icon(win_iconpath);
  					hasicon = true;
  				}
  #endif
  
  				String iconpath = GLOBAL_DEF("application/config/icon", "Variant()");
  				if ((iconpath != "") && (!hasicon)) {
  					Ref<Image> icon;
  					icon.instance();
  					if (ImageLoader::load_image(iconpath, icon) == OK) {
  						OS::get_singleton()->set_icon(icon);
  						hasicon = true;
  					}
  				}
  			}
  		}
  
  #ifdef TOOLS_ENABLED
  		if (project_manager || (script == "" && test == "" && game_path == "" && !editor)) {
  
  			Engine::get_singleton()->set_editor_hint(true);
  			ProjectManager *pmanager = memnew(ProjectManager);
  			ProgressDialog *progress_dialog = memnew(ProgressDialog);
  			pmanager->add_child(progress_dialog);
  			sml->get_root()->add_child(pmanager);
  			OS::get_singleton()->set_context(OS::CONTEXT_PROJECTMAN);
  			project_manager = true;
  		}
  
  		if (project_manager || editor) {
  			// Hide console window if requested (Windows-only).
  			bool hide_console = EditorSettings::get_singleton()->get_setting("interface/editor/hide_console_window");
  			OS::get_singleton()->set_console_visible(!hide_console);
  
  			// Load SSL Certificates from Editor Settings (or builtin)
  			Crypto::load_default_certificates(EditorSettings::get_singleton()->get_setting("network/ssl/editor_ssl_certificates").operator String());
  		}
  #endif
  	}
  
  	if (!hasicon) {
  		Ref<Image> icon = memnew(Image(app_icon_png));
  		OS::get_singleton()->set_icon(icon);
  	}
  
  	OS::get_singleton()->set_main_loop(main_loop);
  
  	return true;
  }
  
  /* Main iteration
   *
   * This is the iteration of the engine's game loop, advancing the state of physics,
   * rendering and audio.
   * It's called directly by the platform's OS::run method, where the loop is created
   * and monitored.
   *
   * The OS implementation can impact its draw step with the Main::force_redraw() method.
   */
  
  uint64_t Main::last_ticks = 0;
  uint32_t Main::frames = 0;
  uint32_t Main::frame = 0;
  bool Main::force_redraw_requested = false;
  int Main::iterating = 0;
  bool Main::is_iterating() {
  	return iterating > 0;
  }
  
  // For performance metrics.
  static uint64_t physics_process_max = 0;
  static uint64_t idle_process_max = 0;
  
  bool Main::iteration() {
  
  	//for now do not error on this
  	//ERR_FAIL_COND_V(iterating, false);
  
  	iterating++;
  
  	uint64_t ticks = OS::get_singleton()->get_ticks_usec();
  	Engine::get_singleton()->_frame_ticks = ticks;
  	main_timer_sync.set_cpu_ticks_usec(ticks);
  	main_timer_sync.set_fixed_fps(fixed_fps);
  
  	uint64_t ticks_elapsed = ticks - last_ticks;
  
  	int physics_fps = Engine::get_singleton()->get_iterations_per_second();
  	float frame_slice = 1.0 / physics_fps;
  
  	float time_scale = Engine::get_singleton()->get_time_scale();
  
  	MainFrameTime advance = main_timer_sync.advance(frame_slice, physics_fps);
  	double step = advance.idle_step;
  	double scaled_step = step * time_scale;
  
  	Engine::get_singleton()->_frame_step = step;
  	Engine::get_singleton()->_physics_interpolation_fraction = advance.interpolation_fraction;
  
  	uint64_t physics_process_ticks = 0;
  	uint64_t idle_process_ticks = 0;
  
  	frame += ticks_elapsed;
  
  	last_ticks = ticks;
  
  	static const int max_physics_steps = 8;
  	if (fixed_fps == -1 && advance.physics_steps > max_physics_steps) {
  		step -= (advance.physics_steps - max_physics_steps) * frame_slice;
  		advance.physics_steps = max_physics_steps;
  	}
  
  	bool exit = false;
  
  	Engine::get_singleton()->_in_physics = true;
  
  	for (int iters = 0; iters < advance.physics_steps; ++iters) {
  
  		uint64_t physics_begin = OS::get_singleton()->get_ticks_usec();
  
  		PhysicsServer::get_singleton()->flush_queries();
  
  		Physics2DServer::get_singleton()->sync();
  		Physics2DServer::get_singleton()->flush_queries();
  
  		if (OS::get_singleton()->get_main_loop()->iteration(frame_slice * time_scale)) {
  			exit = true;
  			break;
  		}
  
  		message_queue->flush();
  
  		PhysicsServer::get_singleton()->step(frame_slice * time_scale);
  
  		Physics2DServer::get_singleton()->end_sync();
  		Physics2DServer::get_singleton()->step(frame_slice * time_scale);
  
  		message_queue->flush();
  
  		physics_process_ticks = MAX(physics_process_ticks, OS::get_singleton()->get_ticks_usec() - physics_begin); // keep the largest one for reference
  		physics_process_max = MAX(OS::get_singleton()->get_ticks_usec() - physics_begin, physics_process_max);
  		Engine::get_singleton()->_physics_frames++;
  	}
  
  	Engine::get_singleton()->_in_physics = false;
  
  	uint64_t idle_begin = OS::get_singleton()->get_ticks_usec();
  
  	if (OS::get_singleton()->get_main_loop()->idle(step * time_scale)) {
  		exit = true;
  	}
  	message_queue->flush();
  
  	VisualServer::get_singleton()->sync(); //sync if still drawing from previous frames.
  
  	if (OS::get_singleton()->can_draw() && VisualServer::get_singleton()->is_render_loop_enabled()) {
  
  		if ((!force_redraw_requested) && OS::get_singleton()->is_in_low_processor_usage_mode()) {
  			if (VisualServer::get_singleton()->has_changed()) {
  				VisualServer::get_singleton()->draw(true, scaled_step); // flush visual commands
  				Engine::get_singleton()->frames_drawn++;
  			}
  		} else {
  			VisualServer::get_singleton()->draw(true, scaled_step); // flush visual commands
  			Engine::get_singleton()->frames_drawn++;
  			force_redraw_requested = false;
  		}
  	}
  
  	idle_process_ticks = OS::get_singleton()->get_ticks_usec() - idle_begin;
  	idle_process_max = MAX(idle_process_ticks, idle_process_max);
  	uint64_t frame_time = OS::get_singleton()->get_ticks_usec() - ticks;
  
  	for (int i = 0; i < ScriptServer::get_language_count(); i++) {
  		ScriptServer::get_language(i)->frame();
  	}
  
  	AudioServer::get_singleton()->update();
  
  	if (script_debugger) {
  		if (script_debugger->is_profiling()) {
  			script_debugger->profiling_set_frame_times(USEC_TO_SEC(frame_time), USEC_TO_SEC(idle_process_ticks), USEC_TO_SEC(physics_process_ticks), frame_slice);
  		}
  		script_debugger->idle_poll();
  	}
  
  	frames++;
  	Engine::get_singleton()->_idle_frames++;
  
  	if (frame > 1000000) {
  
  		if (editor || project_manager) {
  			if (print_fps) {
  				print_line("Editor FPS: " + itos(frames));
  			}
  		} else if (GLOBAL_GET("debug/settings/stdout/print_fps") || print_fps) {
  			print_line("Game FPS: " + itos(frames));
  		}
  
  		Engine::get_singleton()->_fps = frames;
  		performance->set_process_time(USEC_TO_SEC(idle_process_max));
  		performance->set_physics_process_time(USEC_TO_SEC(physics_process_max));
  		idle_process_max = 0;
  		physics_process_max = 0;
  
  		frame %= 1000000;
  		frames = 0;
  	}
  
  	iterating--;
  
  	if (fixed_fps != -1)
  		return exit;
  
  	OS::get_singleton()->add_frame_delay(OS::get_singleton()->can_draw());
  
  #ifdef TOOLS_ENABLED
  	if (auto_build_solutions) {
  		auto_build_solutions = false;
  		// Only relevant when running the editor.
  		if (!editor) {
  			ERR_FAIL_V_MSG(true, "Command line option --build-solutions was passed, but no project is being edited. Aborting.");
  		}
  		if (!EditorNode::get_singleton()->call_build()) {
  			ERR_FAIL_V_MSG(true, "Command line option --build-solutions was passed, but the build callback failed. Aborting.");
  		}
  	}
  #endif
  
  	return exit || auto_quit;
  }
  
  void Main::force_redraw() {
  	force_redraw_requested = true;
  }
  
  /* Engine deinitialization
   *
   * Responsible for freeing all the memory allocated by previous setup steps,
   * so that the engine closes cleanly without leaking memory or crashing.
   * The order matters as some of those steps are linked with each other.
   */
  void Main::cleanup() {
  
  	ERR_FAIL_COND(!_start_success);
  
  	if (script_debugger) {
  		// Flush any remaining messages
  		script_debugger->idle_poll();
  	}
  
  	ResourceLoader::remove_custom_loaders();
  	ResourceSaver::remove_custom_savers();
  
  	// Flush before uninitializing the scene, but delete the MessageQueue as late as possible.
  	message_queue->flush();
  
  	if (script_debugger) {
  		if (use_debug_profiler) {
  			script_debugger->profiling_end();
  		}
  
  		memdelete(script_debugger);
  	}
  
  	OS::get_singleton()->delete_main_loop();
  
  	OS::get_singleton()->_cmdline.clear();
  	OS::get_singleton()->_execpath = "";
  	OS::get_singleton()->_local_clipboard = "";
  
  	ResourceLoader::clear_translation_remaps();
  	ResourceLoader::clear_path_remaps();
  
  	ScriptServer::finish_languages();
  
  	// Sync pending commands that may have been queued from a different thread during ScriptServer finalization
  	VisualServer::get_singleton()->sync();
  
  #ifdef TOOLS_ENABLED
  	EditorNode::unregister_editor_types();
  #endif
  
  	if (arvr_server) {
  		// cleanup now before we pull the rug from underneath...
  		memdelete(arvr_server);
  	}
  
  	ImageLoader::cleanup();
  
  	unregister_driver_types();
  	unregister_module_types();
  	unregister_platform_apis();
  	unregister_scene_types();
  	unregister_server_types();
  
  	if (audio_server) {
  		audio_server->finish();
  		memdelete(audio_server);
  	}
  
  	if (camera_server) {
  		memdelete(camera_server);
  	}
  
  	OS::get_singleton()->finalize();
  	finalize_physics();
  
  	if (packed_data)
  		memdelete(packed_data);
  	if (file_access_network_client)
  		memdelete(file_access_network_client);
  	if (performance)
  		memdelete(performance);
  	if (input_map)
  		memdelete(input_map);
  	if (translation_server)
  		memdelete(translation_server);
  	if (globals)
  		memdelete(globals);
  	if (engine)
  		memdelete(engine);
  
  	if (OS::get_singleton()->is_restart_on_exit_set()) {
  		//attempt to restart with arguments
  		String exec = OS::get_singleton()->get_executable_path();
  		List<String> args = OS::get_singleton()->get_restart_on_exit_arguments();
  		OS::ProcessID pid = 0;
  		OS::get_singleton()->execute(exec, args, false, &pid);
  		OS::get_singleton()->set_restart_on_exit(false, List<String>()); //clear list (uses memory)
  	}
  
  	// Now should be safe to delete MessageQueue (famous last words).
  	message_queue->flush();
  	memdelete(message_queue);
  
  	unregister_core_driver_types();
  	unregister_core_types();
  
  	OS::get_singleton()->finalize_core();
  }
  