Add "dedicated server" export mode which can strip unneeded visual resources

1 files changed, 16 insertions, 6 deletions

diff --git a/main/main.cpp b/main/main.cpp
index 190cdf3151..de00738c57 100644
--- a/main/main.cpp
+++ b/main/main.cpp
@@ -207,6 +207,11 @@ static bool dump_extension_api = false;
 #endif
 bool profile_gpu = false;
 
+// Constants.
+
+static const String NULL_DISPLAY_DRIVER("headless");
+static const String NULL_AUDIO_DRIVER("Dummy");
+
 /* Helper methods */
 
 bool Main::is_cmdline_tool() {
@@ -997,8 +1002,8 @@ Error Main::setup(const char *execpath, int argc, char *argv[], bool p_second_ph
 
 		} else if (I->get() == "--headless") { // enable headless mode (no audio, no rendering).
 
-			audio_driver = "Dummy";
-			display_driver = "headless";
+			audio_driver = NULL_AUDIO_DRIVER;
+			display_driver = NULL_DISPLAY_DRIVER;
 
 		} else if (I->get() == "--profiling") { // enable profiling
 
@@ -1133,8 +1138,8 @@ Error Main::setup(const char *execpath, int argc, char *argv[], bool p_second_ph
 
 			// `--doctool` implies `--headless` to avoid spawning an unnecessary window
 			// and speed up class reference generation.
-			audio_driver = "Dummy";
-			display_driver = "headless";
+			audio_driver = NULL_AUDIO_DRIVER;
+			display_driver = NULL_DISPLAY_DRIVER;
 			main_args.push_back(I->get());
 #endif
 		} else if (I->get() == "--path") { // set path of project to start or edit
@@ -1371,6 +1376,11 @@ Error Main::setup(const char *execpath, int argc, char *argv[], bool p_second_ph
 
 	ResourceUID::get_singleton()->load_from_cache(); // load UUIDs from cache.
 
+	if (ProjectSettings::get_singleton()->has_custom_feature("dedicated_server")) {
+		audio_driver = NULL_AUDIO_DRIVER;
+		display_driver = NULL_DISPLAY_DRIVER;
+	}
+
 	GLOBAL_DEF(PropertyInfo(Variant::INT, "network/limits/debugger/max_chars_per_second", PROPERTY_HINT_RANGE, "0, 4096, 1, or_greater"), 32768);
 	GLOBAL_DEF(PropertyInfo(Variant::INT, "network/limits/debugger/max_queued_messages", PROPERTY_HINT_RANGE, "0, 8192, 1, or_greater"), 2048);
 	GLOBAL_DEF(PropertyInfo(Variant::INT, "network/limits/debugger/max_errors_per_second", PROPERTY_HINT_RANGE, "0, 200, 1, or_greater"), 400);
@@ -1698,7 +1708,7 @@ Error Main::setup(const char *execpath, int argc, char *argv[], bool p_second_ph
 
 	// Display driver, e.g. X11, Wayland.
 	// Make sure that headless is the last one, which it is assumed to be by design.
-	DEV_ASSERT(String("headless") == DisplayServer::get_create_function_name(DisplayServer::get_create_function_count() - 1));
+	DEV_ASSERT(NULL_DISPLAY_DRIVER == DisplayServer::get_create_function_name(DisplayServer::get_create_function_count() - 1));
 	for (int i = 0; i < DisplayServer::get_create_function_count(); i++) {
 		String name = DisplayServer::get_create_function_name(i);
 		if (display_driver == name) {
@@ -1723,7 +1733,7 @@ Error Main::setup(const char *execpath, int argc, char *argv[], bool p_second_ph
 	}
 
 	// Make sure that dummy is the last one, which it is assumed to be by design.
-	DEV_ASSERT(String("Dummy") == AudioDriverManager::get_driver(AudioDriverManager::get_driver_count() - 1)->get_name());
+	DEV_ASSERT(NULL_AUDIO_DRIVER == AudioDriverManager::get_driver(AudioDriverManager::get_driver_count() - 1)->get_name());
 	for (int i = 0; i < AudioDriverManager::get_driver_count(); i++) {
 		if (audio_driver == AudioDriverManager::get_driver(i)->get_name()) {
 			audio_driver_idx = i;