2 files changed, 28 insertions, 1 deletions
diff --git a/platform/linuxbsd/display_server_x11.cpp b/platform/linuxbsd/display_server_x11.cpp
index 8e225d9b5d..ffe6af41e2 100644
--- a/platform/linuxbsd/display_server_x11.cpp
+++ b/platform/linuxbsd/display_server_x11.cpp
@@ -699,6 +699,26 @@ void DisplayServerX11::delete_sub_window(WindowID p_id) {
 	windows.erase(p_id);
 }
 
+void DisplayServerX11::window_attach_instance_id(ObjectID p_instance, WindowID p_window) {
+
+	ERR_FAIL_COND(!windows.has(p_window));
+	WindowData &wd = windows[p_window];
+
+	wd.instance_id = p_instance;
+}
+
+ObjectID DisplayServerX11::window_get_attached_instance_id(WindowID p_window) const {
+
+	ERR_FAIL_COND_V(!windows.has(p_window), ObjectID());
+	const WindowData &wd = windows[p_window];
+	return wd.instance_id;
+}
+
+DisplayServerX11::WindowID DisplayServerX11::get_window_at_screen_position(const Point2i &p_position) const {
+
+	return INVALID_WINDOW_ID;
+}
+
 void DisplayServerX11::window_set_title(const String &p_title, WindowID p_window) {
 
 	_THREAD_SAFE_METHOD_
diff --git a/platform/linuxbsd/display_server_x11.h b/platform/linuxbsd/display_server_x11.h
index bfce4dc88a..5747ac93ba 100644
--- a/platform/linuxbsd/display_server_x11.h
+++ b/platform/linuxbsd/display_server_x11.h
@@ -130,6 +130,8 @@ class DisplayServerX11 : public DisplayServer {
 		WindowID transient_parent = INVALID_WINDOW_ID;
 		Set<WindowID> transient_children;
 
+		ObjectID instance_id;
+
 		//better to guess on the fly, given WM can change it
 		//WindowMode mode;
 		bool fullscreen = false; //OS can't exit from this mode
@@ -263,11 +265,16 @@ public:
 	virtual int screen_get_dpi(int p_screen = SCREEN_OF_MAIN_WINDOW) const;
 	virtual bool screen_is_touchscreen(int p_screen = SCREEN_OF_MAIN_WINDOW) const;
 
-	virtual Vector<int> get_window_list() const;
+	virtual Vector<DisplayServer::WindowID> get_window_list() const;
 
 	virtual WindowID create_sub_window(WindowMode p_mode, uint32_t p_flags, const Rect2i &p_rect = Rect2i());
 	virtual void delete_sub_window(WindowID p_id);
 
+	virtual WindowID get_window_at_screen_position(const Point2i &p_position) const;
+
+	virtual void window_attach_instance_id(ObjectID p_instance, WindowID p_window = MAIN_WINDOW_ID);
+	virtual ObjectID window_get_attached_instance_id(WindowID p_window = MAIN_WINDOW_ID) const;
+
 	virtual void window_set_title(const String &p_title, WindowID p_window = MAIN_WINDOW_ID);
 	virtual void window_set_rect_changed_callback(const Callable &p_callable, WindowID p_window = MAIN_WINDOW_ID);
 	virtual void window_set_window_event_callback(const Callable &p_callable, WindowID p_window = MAIN_WINDOW_ID);