Add startup flag to override XR mode settings

main/main.cpp

@@ -343,6 +343,7 @@ void Main::print_help(const char *p_binary) {
 	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("  --single-window                              Use a single window (no separate subwindows).\n");
+	OS::get_singleton()->print("  --xr-mode <mode>                             Select XR mode (default/off/on).\n");
 	OS::get_singleton()->print("\n");
 
 	OS::get_singleton()->print("Debug options:\n");
@@ -1181,6 +1182,25 @@ Error Main::setup(const char *execpath, int argc, char *argv[], bool p_second_ph
 			OS::get_singleton()->disable_crash_handler();
 		} else if (I->get() == "--skip-breakpoints") {
 			skip_breakpoints = true;
+		} else if (I->get() == "--xr-mode") {
+			if (I->next()) {
+				String xr_mode = I->next()->get().to_lower();
+				N = I->next()->next();
+				if (xr_mode == "default") {
+					XRServer::set_xr_mode(XRServer::XRMODE_DEFAULT);
+				} else if (xr_mode == "off") {
+					XRServer::set_xr_mode(XRServer::XRMODE_OFF);
+				} else if (xr_mode == "on") {
+					XRServer::set_xr_mode(XRServer::XRMODE_ON);
+				} else {
+					OS::get_singleton()->print("Unknown --xr-mode argument \"%s\", aborting.\n", xr_mode.ascii().get_data());
+					goto error;
+				}
+			} else {
+				OS::get_singleton()->print("Missing --xr-mode argument, aborting.\n");
+				goto error;
+			}
+
 		} else {
 			main_args.push_back(I->get());
 		}

modules/openxr/openxr_api.cpp

@@ -58,19 +58,14 @@ bool OpenXRAPI::openxr_is_enabled(bool p_check_run_in_editor) {
 	// @TODO we need an overrule switch so we can force enable openxr, i.e run "godot --openxr_enabled"
 
 	if (Engine::get_singleton()->is_editor_hint() && p_check_run_in_editor) {
-#ifdef TOOLS_ENABLED
 		// Disabled for now, using XR inside of the editor we'll be working on during the coming months.
 		return false;
-
-		// bool enabled = GLOBAL_GET("xr/openxr/in_editor"); // EDITOR_GET("xr/openxr/in_editor");
-		// return enabled;
-#else
-		// we should never get here, editor hint won't be true if the editor isn't compiled in.
-		return false;
-#endif
 	} else {
-		bool enabled = GLOBAL_GET("xr/openxr/enabled");
-		return enabled;
+		if (XRServer::get_xr_mode() == XRServer::XRMODE_DEFAULT) {
+			return GLOBAL_GET("xr/openxr/enabled");
+		} else {
+			return XRServer::get_xr_mode() == XRServer::XRMODE_ON;
+		}
 	}
 }
 

servers/rendering/renderer_compositor.cpp

@@ -33,6 +33,7 @@
 #include "core/config/project_settings.h"
 #include "core/os/os.h"
 #include "core/string/print_string.h"
+#include "servers/xr_server.h"
 
 RendererCompositor *(*RendererCompositor::_create_func)() = nullptr;
 bool RendererCompositor::low_end = false;
@@ -46,7 +47,11 @@ bool RendererCompositor::is_xr_enabled() const {
 }
 
 RendererCompositor::RendererCompositor() {
+	if (XRServer::get_xr_mode() == XRServer::XRMODE_DEFAULT) {
 		xr_enabled = GLOBAL_GET("xr/shaders/enabled");
+	} else {
+		xr_enabled = XRServer::get_xr_mode() == XRServer::XRMODE_ON;
+	}
 }
 
 RendererCanvasRender *RendererCanvasRender::singleton = nullptr;

servers/xr_server.cpp

@@ -33,6 +33,16 @@
 #include "xr/xr_interface.h"
 #include "xr/xr_positional_tracker.h"
 
+XRServer::XRMode XRServer::xr_mode = XRMODE_DEFAULT;
+
+XRServer::XRMode XRServer::get_xr_mode() {
+	return xr_mode;
+}
+
+void XRServer::set_xr_mode(XRServer::XRMode p_mode) {
+	xr_mode = p_mode;
+}
+
 XRServer *XRServer::singleton = nullptr;
 
 XRServer *XRServer::get_singleton() {

servers/xr_server.h

@@ -57,6 +57,12 @@ class XRServer : public Object {
 	_THREAD_SAFE_CLASS_
 
 public:
+	enum XRMode {
+		XRMODE_DEFAULT, /* Default behaviour, means we check project settings */
+		XRMODE_OFF, /* Ignore project settings, disable OpenXR, disable shaders */
+		XRMODE_ON, /* Ignore project settings, enable OpenXR, enable shaders, run editor in VR (if applicable) */
+	};
+
 	enum TrackerType {
 		TRACKER_HEAD = 0x01, /* tracks the position of the players head (or in case of handheld AR, location of the phone) */
 		TRACKER_CONTROLLER = 0x02, /* tracks a controller */
@@ -75,6 +81,8 @@ public:
 	};
 
 private:
+	static XRMode xr_mode;
+
 	Vector<Ref<XRInterface>> interfaces;
 	Dictionary trackers;
 
@@ -90,6 +98,9 @@ protected:
 	static void _bind_methods();
 
 public:
+	static XRMode get_xr_mode();
+	static void set_xr_mode(XRMode p_mode);
+
 	static XRServer *get_singleton();
 
 	/*