feat: show my cursor (#12745)

Signed-off-by: fufesou <linlong1266@gmail.com>

src/client.rs

@@ -2132,7 +2132,19 @@ impl LoginConfigHandler {
                 option.show_remote_cursor = f(self.get_toggle_option("show-remote-cursor"));
                 option.enable_file_transfer = f(self.config.enable_file_copy_paste.v);
                 option.lock_after_session_end = f(self.config.lock_after_session_end.v);
+                if config.show_my_cursor.v {
+                    config.show_my_cursor.v = false;
+                    option.show_my_cursor = BoolOption::No.into();
+                }
             }
+        } else if name == "show-my-cursor" {
+            config.show_my_cursor.v = !config.show_my_cursor.v;
+            option.show_my_cursor = if config.show_my_cursor.v {
+                BoolOption::Yes
+            } else {
+                BoolOption::No
+            }
+            .into();
         } else {
             let is_set = self
                 .options
@@ -2225,6 +2237,9 @@ impl LoginConfigHandler {
         if view_only || self.get_toggle_option("show-remote-cursor") {
             msg.show_remote_cursor = BoolOption::Yes.into();
         }
+        if view_only && self.get_toggle_option("show-my-cursor") {
+            msg.show_my_cursor = BoolOption::Yes.into();
+        }
         if self.get_toggle_option("follow-remote-cursor") {
             msg.follow_remote_cursor = BoolOption::Yes.into();
         }
@@ -2309,6 +2324,8 @@ impl LoginConfigHandler {
             self.config.allow_swap_key.v
         } else if name == "view-only" {
             self.config.view_only.v
+        } else if name == "show-my-cursor" {
+            self.config.show_my_cursor.v
         } else if name == "follow-remote-cursor" {
             self.config.follow_remote_cursor.v
         } else if name == "follow-remote-window" {

src/common.rs

@@ -2040,6 +2040,22 @@ pub async fn get_ipv6_socket() -> Option<(Arc<UdpSocket>, bytes::Bytes)> {
     None
 }
 
+// The color is the same to `str2color()` in flutter.
+pub fn str2color(s: &str, alpha: u8) -> u32 {
+    let bytes = s.as_bytes();
+    // dart code `160 << 16 + 114 << 8 + 91` results `0`.
+    let mut hash: u32 = 0;
+    for &byte in bytes {
+        let code = byte as u32;
+        hash = code.wrapping_add((hash << 5).wrapping_sub(hash));
+    }
+
+    hash = hash % 16777216;
+    let rgb = hash & 0xFF7FFF;
+
+    (alpha as u32) << 24 | rgb
+}
+
 #[cfg(test)]
 mod tests {
     use super::*;

src/core_main.rs

@@ -574,6 +574,12 @@ pub fn core_main() -> Option<Vec<String>> {
                 crate::flutter::connection_manager::start_cm_no_ui();
             }
             return None;
+        } else if args[0] == "--whiteboard" {
+            #[cfg(target_os = "windows")]
+            {
+                crate::whiteboard::run();
+            }
+            return None;
         } else if args[0] == "-gtk-sudo" {
             // rustdesk service kill `rustdesk --` processes
             #[cfg(target_os = "linux")]

src/ipc.rs

@@ -177,7 +177,7 @@ pub enum DataPortableService {
     Ping,
     Pong,
     ConnCount(Option<usize>),
-    Mouse((Vec<u8>, i32)),
+    Mouse((Vec<u8>, i32, String, u32, bool, bool)),
     Pointer((Vec<u8>, i32)),
     Key(Vec<u8>),
     RequestStart,
@@ -289,6 +289,8 @@ pub enum Data {
     #[cfg(target_os = "windows")]
     PortForwardSessionCount(Option<usize>),
     SocksWs(Option<Box<(Option<config::Socks5Server>, String)>>),
+    #[cfg(target_os = "windows")]
+    Whiteboard((String, crate::whiteboard::CustomEvent)),
 }
 
 #[tokio::main(flavor = "current_thread")]

src/lang/ar.rs

@@ -708,6 +708,7 @@ pub static ref T: std::collections::HashMap<&'static str, &'static str> =
         ("Failed to check if the user is an administrator.", "فشل التحقق مما إذا كان المستخدم لديه صلاحيات المسؤول."),
         ("Supported only in the installed version.", "مدعوم فقط في النسخة المُثبتة."),
         ("elevation_username_tip", "يرجى إدخال اسم مستخدم بصلاحيات المسؤول للمتابعة."),
-        ("Preparing for installation ...", "جارٍ التحضير للتثبيت...")
+        ("Preparing for installation ...", "جارٍ التحضير للتثبيت..."),
+        ("Show my cursor", ""),
     ].iter().cloned().collect();
 }

src/lang/be.rs

@@ -709,5 +709,6 @@ pub static ref T: std::collections::HashMap<&'static str, &'static str> =
         ("Supported only in the installed version.", ""),
         ("elevation_username_tip", ""),
         ("Preparing for installation ...", ""),
+        ("Show my cursor", ""),
     ].iter().cloned().collect();
 }

src/lang/bg.rs

@@ -709,5 +709,6 @@ pub static ref T: std::collections::HashMap<&'static str, &'static str> =
         ("Supported only in the installed version.", ""),
         ("elevation_username_tip", ""),
         ("Preparing for installation ...", ""),
+        ("Show my cursor", ""),
     ].iter().cloned().collect();
 }

src/lang/ca.rs

@@ -709,5 +709,6 @@ pub static ref T: std::collections::HashMap<&'static str, &'static str> =
         ("Supported only in the installed version.", ""),
         ("elevation_username_tip", ""),
         ("Preparing for installation ...", ""),
+        ("Show my cursor", ""),
     ].iter().cloned().collect();
 }

src/lang/cn.rs

@@ -709,5 +709,6 @@ pub static ref T: std::collections::HashMap<&'static str, &'static str> =
         ("Supported only in the installed version.", "仅在以安装版本受支持。"),
         ("elevation_username_tip", "输入用户名或域名\\用户名"),
         ("Preparing for installation ...", "准备安装..."),
+        ("Show my cursor", "显示我的光标"),
     ].iter().cloned().collect();
 }

src/lang/cs.rs

@@ -709,5 +709,6 @@ pub static ref T: std::collections::HashMap<&'static str, &'static str> =
         ("Supported only in the installed version.", ""),
         ("elevation_username_tip", ""),
         ("Preparing for installation ...", ""),
+        ("Show my cursor", ""),
     ].iter().cloned().collect();
 }

src/lang/da.rs

@@ -709,5 +709,6 @@ pub static ref T: std::collections::HashMap<&'static str, &'static str> =
         ("Supported only in the installed version.", ""),
         ("elevation_username_tip", ""),
         ("Preparing for installation ...", ""),
+        ("Show my cursor", ""),
     ].iter().cloned().collect();
 }

src/lang/de.rs

@@ -709,5 +709,6 @@ pub static ref T: std::collections::HashMap<&'static str, &'static str> =
         ("Supported only in the installed version.", "Wird nur in der installierten Version unterstützt."),
         ("elevation_username_tip", "Geben Sie Benutzername oder Domäne\\Benutzername ein"),
         ("Preparing for installation ...", "Installation wird vorbereitet …"),
+        ("Show my cursor", ""),
     ].iter().cloned().collect();
 }

src/lang/el.rs

@@ -709,5 +709,6 @@ pub static ref T: std::collections::HashMap<&'static str, &'static str> =
         ("Supported only in the installed version.", ""),
         ("elevation_username_tip", ""),
         ("Preparing for installation ...", ""),
+        ("Show my cursor", ""),
     ].iter().cloned().collect();
 }

src/lang/eo.rs

@@ -709,5 +709,6 @@ pub static ref T: std::collections::HashMap<&'static str, &'static str> =
         ("Supported only in the installed version.", ""),
         ("elevation_username_tip", ""),
         ("Preparing for installation ...", ""),
+        ("Show my cursor", ""),
     ].iter().cloned().collect();
 }

src/lang/es.rs

@@ -709,5 +709,6 @@ pub static ref T: std::collections::HashMap<&'static str, &'static str> =
         ("Supported only in the installed version.", "Soportado solo en la versión instalada."),
         ("elevation_username_tip", "Introduzca el nombre de usuario o dominio\\NombreDeUsuario"),
         ("Preparing for installation ...", ""),
+        ("Show my cursor", ""),
     ].iter().cloned().collect();
 }

src/lang/et.rs

@@ -709,5 +709,6 @@ pub static ref T: std::collections::HashMap<&'static str, &'static str> =
         ("Supported only in the installed version.", ""),
         ("elevation_username_tip", ""),
         ("Preparing for installation ...", ""),
+        ("Show my cursor", ""),
     ].iter().cloned().collect();
 }

src/lang/eu.rs

@@ -709,5 +709,6 @@ pub static ref T: std::collections::HashMap<&'static str, &'static str> =
         ("Supported only in the installed version.", ""),
         ("elevation_username_tip", ""),
         ("Preparing for installation ...", ""),
+        ("Show my cursor", ""),
     ].iter().cloned().collect();
 }

src/lang/fa.rs

@@ -709,5 +709,6 @@ pub static ref T: std::collections::HashMap<&'static str, &'static str> =
         ("Supported only in the installed version.", "فقط در نسخه نصب‌شده پشتیبانی می‌شود."),
         ("elevation_username_tip", "لطفاً نام کاربری مدیریتی را برای ارتقاء دسترسی وارد کنید."),
         ("Preparing for installation ...", "در حال آماده‌سازی برای نصب..."),
+        ("Show my cursor", ""),
     ].iter().cloned().collect();
 }

src/lang/fr.rs

@@ -709,5 +709,6 @@ pub static ref T: std::collections::HashMap<&'static str, &'static str> =
         ("Supported only in the installed version.", "Uniquement pris en charge dans la version installée."),
         ("elevation_username_tip", "Saisissez un nom d’utilisateur ou un domaine\\utilisateur"),
         ("Preparing for installation ...", "Préparation de l’installation…"),
+        ("Show my cursor", ""),
     ].iter().cloned().collect();
 }

src/lang/ge.rs

@@ -709,5 +709,6 @@ pub static ref T: std::collections::HashMap<&'static str, &'static str> =
         ("Supported only in the installed version.", ""),
         ("elevation_username_tip", ""),
         ("Preparing for installation ...", ""),
+        ("Show my cursor", ""),
     ].iter().cloned().collect();
 }

src/lang/he.rs

@@ -709,5 +709,6 @@ pub static ref T: std::collections::HashMap<&'static str, &'static str> =
         ("Supported only in the installed version.", "נתמך רק בגרסה המותקנת"),
         ("elevation_username_tip", "רמז_ליוזר_להעלאת_הרשאה"),
         ("Preparing for installation ...", "הכנה להתקנה..."),
+        ("Show my cursor", ""),
     ].iter().cloned().collect();
 }

src/lang/hr.rs

@@ -709,5 +709,6 @@ pub static ref T: std::collections::HashMap<&'static str, &'static str> =
         ("Supported only in the installed version.", ""),
         ("elevation_username_tip", ""),
         ("Preparing for installation ...", ""),
+        ("Show my cursor", ""),
     ].iter().cloned().collect();
 }

src/lang/hu.rs

@@ -709,5 +709,6 @@ pub static ref T: std::collections::HashMap<&'static str, &'static str> =
         ("Supported only in the installed version.", "Csak a telepített változatban támogatott."),
         ("elevation_username_tip", "Felhasználónév vagy tartománynév megadása\\felhasználónév"),
         ("Preparing for installation ...", "Felkészülés a telepítésre ..."),
+        ("Show my cursor", ""),
     ].iter().cloned().collect();
 }

src/lang/id.rs

@@ -709,5 +709,6 @@ pub static ref T: std::collections::HashMap<&'static str, &'static str> =
         ("Supported only in the installed version.", ""),
         ("elevation_username_tip", ""),
         ("Preparing for installation ...", ""),
+        ("Show my cursor", ""),
     ].iter().cloned().collect();
 }

src/lang/it.rs

@@ -709,5 +709,6 @@ pub static ref T: std::collections::HashMap<&'static str, &'static str> =
         ("Supported only in the installed version.", "Supportato solo nella versione installata."),
         ("elevation_username_tip", "Inserisci Nome utente o dominio sorgente\\nome Utente"),
         ("Preparing for installation ...", "Preparazione per l'installazione..."),
+        ("Show my cursor", ""),
     ].iter().cloned().collect();
 }

src/lang/ja.rs

@@ -709,5 +709,6 @@ pub static ref T: std::collections::HashMap<&'static str, &'static str> =
         ("Supported only in the installed version.", "インストールされたバージョンでのみサポートされます。"),
         ("elevation_username_tip", "ユーザー名またはドメインのユーザー名を入力してください。"),
         ("Preparing for installation ...", "インストールの準備中です..."),
+        ("Show my cursor", ""),
     ].iter().cloned().collect();
 }

src/lang/ko.rs

@@ -709,5 +709,6 @@ pub static ref T: std::collections::HashMap<&'static str, &'static str> =
         ("Supported only in the installed version.", "설치된 버전에서만 지원됩니다."),
         ("elevation_username_tip", "사용자 이름 또는 도메인\\사용자 이름 입력"),
         ("Preparing for installation ...", "설치 준비 중 ..."),
+        ("Show my cursor", ""),
     ].iter().cloned().collect();
 }

src/lang/kz.rs

@@ -709,5 +709,6 @@ pub static ref T: std::collections::HashMap<&'static str, &'static str> =
         ("Supported only in the installed version.", ""),
         ("elevation_username_tip", ""),
         ("Preparing for installation ...", ""),
+        ("Show my cursor", ""),
     ].iter().cloned().collect();
 }

src/lang/lt.rs

@@ -709,5 +709,6 @@ pub static ref T: std::collections::HashMap<&'static str, &'static str> =
         ("Supported only in the installed version.", ""),
         ("elevation_username_tip", ""),
         ("Preparing for installation ...", ""),
+        ("Show my cursor", ""),
     ].iter().cloned().collect();
 }

src/lang/lv.rs

@@ -709,5 +709,6 @@ pub static ref T: std::collections::HashMap<&'static str, &'static str> =
         ("Supported only in the installed version.", ""),
         ("elevation_username_tip", ""),
         ("Preparing for installation ...", ""),
+        ("Show my cursor", ""),
     ].iter().cloned().collect();
 }

src/lang/nb.rs

@@ -709,5 +709,6 @@ pub static ref T: std::collections::HashMap<&'static str, &'static str> =
         ("Supported only in the installed version.", ""),
         ("elevation_username_tip", ""),
         ("Preparing for installation ...", ""),
+        ("Show my cursor", ""),
     ].iter().cloned().collect();
 }

src/lang/nl.rs

@@ -709,5 +709,6 @@ pub static ref T: std::collections::HashMap<&'static str, &'static str> =
         ("Supported only in the installed version.", "Alleen ondersteund in de geïnstalleerde versie."),
         ("elevation_username_tip", "Voer je gebruikersnaam of domeinnaam in"),
         ("Preparing for installation ...", "Installatie voorbereiden ..."),
+        ("Show my cursor", ""),
     ].iter().cloned().collect();
 }

src/lang/pl.rs

@@ -709,5 +709,6 @@ pub static ref T: std::collections::HashMap<&'static str, &'static str> =
         ("Supported only in the installed version.", "Wspierane tylko dla zainstalowanej aplikacji."),
         ("elevation_username_tip", "Podaj nazwę użytkownika lub domena\\użytkownik"),
         ("Preparing for installation ...", "Przygotowywanie do instalacji ..."),
+        ("Show my cursor", ""),
     ].iter().cloned().collect();
 }

src/lang/pt_PT.rs

@@ -709,5 +709,6 @@ pub static ref T: std::collections::HashMap<&'static str, &'static str> =
         ("Supported only in the installed version.", ""),
         ("elevation_username_tip", ""),
         ("Preparing for installation ...", ""),
+        ("Show my cursor", ""),
     ].iter().cloned().collect();
 }

src/lang/ptbr.rs

@@ -709,5 +709,6 @@ pub static ref T: std::collections::HashMap<&'static str, &'static str> =
         ("Supported only in the installed version.", ""),
         ("elevation_username_tip", ""),
         ("Preparing for installation ...", ""),
+        ("Show my cursor", ""),
     ].iter().cloned().collect();
 }

src/lang/ro.rs

@@ -709,5 +709,6 @@ pub static ref T: std::collections::HashMap<&'static str, &'static str> =
         ("Supported only in the installed version.", ""),
         ("elevation_username_tip", ""),
         ("Preparing for installation ...", ""),
+        ("Show my cursor", ""),
     ].iter().cloned().collect();
 }

src/lang/ru.rs

@@ -709,5 +709,6 @@ pub static ref T: std::collections::HashMap<&'static str, &'static str> =
         ("Supported only in the installed version.", "Поддерживается только в установочной версии."),
         ("elevation_username_tip", "Введите пользователя или домен\\пользователя"),
         ("Preparing for installation ...", "Подготовка к установке..."),
+        ("Show my cursor", ""),
     ].iter().cloned().collect();
 }

src/lang/sc.rs

@@ -709,5 +709,6 @@ pub static ref T: std::collections::HashMap<&'static str, &'static str> =
         ("Supported only in the installed version.", "Suportadu petzi in sa versione installada."),
         ("elevation_username_tip", "Inserta Nùmene utente o domìniu de fonte\\nùmene Utente"),
         ("Preparing for installation ...", ""),
+        ("Show my cursor", ""),
     ].iter().cloned().collect();
 }

src/lang/sk.rs

@@ -709,5 +709,6 @@ pub static ref T: std::collections::HashMap<&'static str, &'static str> =
         ("Supported only in the installed version.", ""),
         ("elevation_username_tip", ""),
         ("Preparing for installation ...", ""),
+        ("Show my cursor", ""),
     ].iter().cloned().collect();
 }

src/lang/sl.rs

@@ -709,5 +709,6 @@ pub static ref T: std::collections::HashMap<&'static str, &'static str> =
         ("Supported only in the installed version.", ""),
         ("elevation_username_tip", ""),
         ("Preparing for installation ...", ""),
+        ("Show my cursor", ""),
     ].iter().cloned().collect();
 }

src/lang/sq.rs

@@ -709,5 +709,6 @@ pub static ref T: std::collections::HashMap<&'static str, &'static str> =
         ("Supported only in the installed version.", ""),
         ("elevation_username_tip", ""),
         ("Preparing for installation ...", ""),
+        ("Show my cursor", ""),
     ].iter().cloned().collect();
 }

src/lang/sr.rs

@@ -709,5 +709,6 @@ pub static ref T: std::collections::HashMap<&'static str, &'static str> =
         ("Supported only in the installed version.", ""),
         ("elevation_username_tip", ""),
         ("Preparing for installation ...", ""),
+        ("Show my cursor", ""),
     ].iter().cloned().collect();
 }

src/lang/sv.rs

@@ -709,5 +709,6 @@ pub static ref T: std::collections::HashMap<&'static str, &'static str> =
         ("Supported only in the installed version.", ""),
         ("elevation_username_tip", ""),
         ("Preparing for installation ...", ""),
+        ("Show my cursor", ""),
     ].iter().cloned().collect();
 }

src/lang/ta.rs

@@ -709,5 +709,6 @@ pub static ref T: std::collections::HashMap<&'static str, &'static str> =
         ("Supported only in the installed version.", ""),
         ("elevation_username_tip", ""),
         ("Preparing for installation ...", ""),
+        ("Show my cursor", ""),
     ].iter().cloned().collect();
 }

src/lang/template.rs

@@ -709,5 +709,6 @@ pub static ref T: std::collections::HashMap<&'static str, &'static str> =
         ("Supported only in the installed version.", ""),
         ("elevation_username_tip", ""),
         ("Preparing for installation ...", ""),
+        ("Show my cursor", ""),
     ].iter().cloned().collect();
 }

src/lang/th.rs

@@ -709,5 +709,6 @@ pub static ref T: std::collections::HashMap<&'static str, &'static str> =
         ("Supported only in the installed version.", ""),
         ("elevation_username_tip", ""),
         ("Preparing for installation ...", ""),
+        ("Show my cursor", ""),
     ].iter().cloned().collect();
 }

src/lang/tr.rs

@@ -709,5 +709,6 @@ pub static ref T: std::collections::HashMap<&'static str, &'static str> =
         ("Supported only in the installed version.", ""),
         ("elevation_username_tip", ""),
         ("Preparing for installation ...", ""),
+        ("Show my cursor", ""),
     ].iter().cloned().collect();
 }

src/lang/tw.rs

@@ -709,5 +709,6 @@ pub static ref T: std::collections::HashMap<&'static str, &'static str> =
         ("Supported only in the installed version.", "僅支援於已安裝的版本"),
         ("elevation_username_tip", "輸入使用者名稱或網域\\使用者名稱"),
         ("Preparing for installation ...", ""),
+        ("Show my cursor", ""),
     ].iter().cloned().collect();
 }

src/lang/uk.rs

@@ -709,5 +709,6 @@ pub static ref T: std::collections::HashMap<&'static str, &'static str> =
         ("Supported only in the installed version.", ""),
         ("elevation_username_tip", ""),
         ("Preparing for installation ...", ""),
+        ("Show my cursor", ""),
     ].iter().cloned().collect();
 }

src/lang/vi.rs

@@ -709,5 +709,6 @@ pub static ref T: std::collections::HashMap<&'static str, &'static str> =
         ("Supported only in the installed version.", ""),
         ("elevation_username_tip", ""),
         ("Preparing for installation ...", ""),
+        ("Show my cursor", ""),
     ].iter().cloned().collect();
 }

src/lib.rs

@@ -55,6 +55,9 @@ pub mod plugin;
 #[cfg(not(any(target_os = "android", target_os = "ios")))]
 mod tray;
 
+#[cfg(target_os = "windows")]
+mod whiteboard;
+
 #[cfg(not(any(target_os = "android", target_os = "ios")))]
 mod updater;
 

src/server/connection.rs

@@ -126,9 +126,18 @@ pub struct ConnInner {
     tx_video: Option<Sender>,
 }
 
+struct InputMouse {
+    msg: MouseEvent,
+    conn_id: i32,
+    username: String,
+    argb: u32,
+    simulate: bool,
+    show_cursor: bool,
+}
+
 enum MessageInput {
     #[cfg(not(any(target_os = "android", target_os = "ios")))]
-    Mouse((MouseEvent, i32)),
+    Mouse(InputMouse),
     #[cfg(not(any(target_os = "android", target_os = "ios")))]
     Key((KeyEvent, bool)),
     #[cfg(not(any(target_os = "android", target_os = "ios")))]
@@ -225,6 +234,9 @@ pub struct Connection {
     // by peer
     disable_keyboard: bool,
     // by peer
+    #[cfg(not(any(target_os = "android", target_os = "ios")))]
+    show_my_cursor: bool,
+    // by peer
     disable_clipboard: bool,
     // by peer
     disable_audio: bool,
@@ -240,6 +252,7 @@ pub struct Connection {
     server_audit_conn: String,
     server_audit_file: String,
     lr: LoginRequest,
+    peer_argb: u32,
     session_last_recv_time: Option<Arc<Mutex<Instant>>>,
     chat_unanswered: bool,
     file_transferred: bool,
@@ -403,11 +416,14 @@ impl Connection {
             enable_file_transfer: false,
             disable_clipboard: false,
             disable_keyboard: false,
+            #[cfg(not(any(target_os = "android", target_os = "ios")))]
+            show_my_cursor: false,
             tx_input,
             video_ack_required: false,
             server_audit_conn: "".to_owned(),
             server_audit_file: "".to_owned(),
             lr: Default::default(),
+            peer_argb: 0u32,
             session_last_recv_time: None,
             chat_unanswered: false,
             file_transferred: false,
@@ -938,8 +954,15 @@ impl Connection {
         loop {
             match receiver.recv_timeout(std::time::Duration::from_millis(500)) {
                 Ok(v) => match v {
-                    MessageInput::Mouse((msg, id)) => {
-                        handle_mouse(&msg, id);
+                    MessageInput::Mouse(mouse_input) => {
+                        handle_mouse(
+                            &mouse_input.msg,
+                            mouse_input.conn_id,
+                            mouse_input.username,
+                            mouse_input.argb,
+                            mouse_input.simulate,
+                            mouse_input.show_cursor,
+                        );
                     }
                     MessageInput::Key((mut msg, press)) => {
                         // Set the press state to false, use `down` only in `handle_key()`.
@@ -1784,8 +1807,25 @@ impl Connection {
 
     #[inline]
     #[cfg(not(any(target_os = "android", target_os = "ios")))]
-    fn input_mouse(&self, msg: MouseEvent, conn_id: i32) {
-        self.tx_input.send(MessageInput::Mouse((msg, conn_id))).ok();
+    fn input_mouse(
+        &self,
+        msg: MouseEvent,
+        conn_id: i32,
+        username: String,
+        argb: u32,
+        simulate: bool,
+        show_cursor: bool,
+    ) {
+        self.tx_input
+            .send(MessageInput::Mouse(InputMouse {
+                msg,
+                conn_id,
+                username,
+                argb,
+                simulate,
+                show_cursor,
+            }))
+            .ok();
     }
 
     #[inline]
@@ -1900,6 +1940,7 @@ impl Connection {
 
     async fn handle_login_request_without_validation(&mut self, lr: &LoginRequest) {
         self.lr = lr.clone();
+        self.peer_argb = crate::str2color(&format!("{}{}", &lr.my_id, &lr.my_platform), 0xff);
         if let Some(o) = lr.option.as_ref() {
             self.options_in_login = Some(o.clone());
         }
@@ -2279,7 +2320,23 @@ impl Connection {
                         }
                         #[cfg(target_os = "macos")]
                         self.retina.on_mouse_event(&mut me, self.display_idx);
-                        self.input_mouse(me, self.inner.id());
+                        self.input_mouse(
+                            me,
+                            self.inner.id(),
+                            self.lr.my_name.clone(),
+                            self.peer_argb,
+                            true,
+                            self.show_my_cursor,
+                        );
+                    } else if self.show_my_cursor {
+                        self.input_mouse(
+                            me,
+                            self.inner.id(),
+                            self.lr.my_name.clone(),
+                            self.peer_argb,
+                            false,
+                            true,
+                        );
                     }
                     self.update_auto_disconnect_timer();
                 }
@@ -3640,6 +3697,18 @@ impl Connection {
                 self.update_terminal_persistence(q == BoolOption::Yes).await;
             }
         }
+        #[cfg(target_os = "windows")]
+        if let Ok(q) = o.show_my_cursor.enum_value() {
+            if q != BoolOption::NotSet {
+                use crate::whiteboard;
+                self.show_my_cursor = q == BoolOption::Yes;
+                if q == BoolOption::Yes {
+                    whiteboard::register_whiteboard(whiteboard::get_key_cursor(self.inner.id));
+                } else {
+                    whiteboard::unregister_whiteboard(whiteboard::get_key_cursor(self.inner.id));
+                }
+            }
+        }
     }
 
     async fn turn_on_privacy(&mut self, impl_key: String) {
@@ -4792,6 +4861,11 @@ mod raii {
                 scrap::wayland::pipewire::try_close_session();
             }
             Self::check_wake_lock();
+            #[cfg(target_os = "windows")]
+            {
+                use crate::whiteboard;
+                whiteboard::unregister_whiteboard(whiteboard::get_key_cursor(self.0));
+            }
         }
     }
 }

src/server/input_service.rs

@@ -2,6 +2,8 @@
 use super::rdp_input::client::{RdpInputKeyboard, RdpInputMouse};
 use super::*;
 use crate::input::*;
+#[cfg(target_os = "windows")]
+use crate::whiteboard;
 #[cfg(target_os = "macos")]
 use dispatch::Queue;
 use enigo::{Enigo, Key, KeyboardControllable, MouseButton, MouseControllable};
@@ -698,18 +700,25 @@ fn get_modifier_state(key: Key, en: &mut Enigo) -> bool {
 }
 
 #[allow(unreachable_code)]
-pub fn handle_mouse(evt: &MouseEvent, conn: i32) {
+pub fn handle_mouse(
+    evt: &MouseEvent,
+    conn: i32,
+    username: String,
+    argb: u32,
+    simulate: bool,
+    show_cursor: bool,
+) {
     #[cfg(target_os = "macos")]
     {
         // having GUI (--server has tray, it is GUI too), run main GUI thread, otherwise crash
         let evt = evt.clone();
-        QUEUE.exec_async(move || handle_mouse_(&evt, conn));
+        QUEUE.exec_async(move || handle_mouse_(&evt, conn, username, argb, simulate, show_cursor));
         return;
     }
     #[cfg(windows)]
-    crate::portable_service::client::handle_mouse(evt, conn);
+    crate::portable_service::client::handle_mouse(evt, conn, username, argb, simulate, show_cursor);
     #[cfg(not(windows))]
-    handle_mouse_(evt, conn);
+    handle_mouse_(evt, conn, username, argb, simulate, show_cursor);
 }
 
 // to-do: merge handle_mouse and handle_pointer
@@ -979,7 +988,24 @@ pub fn handle_pointer_(evt: &PointerDeviceEvent, conn: i32) {
     }
 }
 
-pub fn handle_mouse_(evt: &MouseEvent, conn: i32) {
+pub fn handle_mouse_(
+    evt: &MouseEvent,
+    conn: i32,
+    username: String,
+    argb: u32,
+    simulate: bool,
+    _show_cursor: bool,
+) {
+    if simulate {
+        handle_mouse_simulation_(evt, conn);
+    }
+    #[cfg(target_os = "windows")]
+    if _show_cursor {
+        handle_mouse_show_cursor_(evt, conn, username, argb);
+    }
+}
+
+pub fn handle_mouse_simulation_(evt: &MouseEvent, conn: i32) {
     if !active_mouse_(conn) {
         return;
     }
@@ -1122,6 +1148,41 @@ pub fn handle_mouse_(evt: &MouseEvent, conn: i32) {
     }
 }
 
+#[cfg(target_os = "windows")]
+pub fn handle_mouse_show_cursor_(evt: &MouseEvent, conn: i32, username: String, argb: u32) {
+    let buttons = evt.mask >> 3;
+    let evt_type = evt.mask & 0x7;
+    match evt_type {
+        MOUSE_TYPE_MOVE => {
+            whiteboard::update_whiteboard(
+                whiteboard::get_key_cursor(conn),
+                whiteboard::CustomEvent::Cursor(whiteboard::Cursor {
+                    x: evt.x as _,
+                    y: evt.y as _,
+                    argb,
+                    btns: 0,
+                    text: username,
+                }),
+            );
+        }
+        MOUSE_TYPE_UP => {
+            if buttons == MOUSE_BUTTON_LEFT {
+                whiteboard::update_whiteboard(
+                    whiteboard::get_key_cursor(conn),
+                    whiteboard::CustomEvent::Cursor(whiteboard::Cursor {
+                        x: evt.x as _,
+                        y: evt.y as _,
+                        argb,
+                        btns: buttons,
+                        text: username,
+                    }),
+                );
+            }
+        }
+        _ => {}
+    }
+}
+
 #[cfg(target_os = "windows")]
 fn handle_scale(scale: i32) {
     let mut en = ENIGO.lock().unwrap();

src/server/portable_service.rs

@@ -476,9 +476,9 @@ pub mod server {
                                             break;
                                         }
                                     }
-                                    Mouse((v, conn)) => {
+                                    Mouse((v, conn, username, argb, simulate, show_cursor)) => {
                                         if let Ok(evt) = MouseEvent::parse_from_bytes(&v) {
-                                            crate::input_service::handle_mouse_(&evt, conn);
+                                            crate::input_service::handle_mouse_(&evt, conn, username, argb, simulate, show_cursor);
                                         }
                                     }
                                     Pointer((v, conn)) => {
@@ -875,11 +875,23 @@ pub mod client {
         }
     }
 
-    fn handle_mouse_(evt: &MouseEvent, conn: i32) -> ResultType<()> {
+    fn handle_mouse_(
+        evt: &MouseEvent,
+        conn: i32,
+        username: String,
+        argb: u32,
+        simulate: bool,
+        show_cursor: bool,
+    ) -> ResultType<()> {
         let mut v = vec![];
         evt.write_to_vec(&mut v)?;
         ipc_send(Data::DataPortableService(DataPortableService::Mouse((
-            v, conn,
+            v,
+            conn,
+            username,
+            argb,
+            simulate,
+            show_cursor,
         ))))
     }
 
@@ -927,12 +939,19 @@ pub mod client {
         }
     }
 
-    pub fn handle_mouse(evt: &MouseEvent, conn: i32) {
+    pub fn handle_mouse(
+        evt: &MouseEvent,
+        conn: i32,
+        username: String,
+        argb: u32,
+        simulate: bool,
+        show_cursor: bool,
+    ) {
         if RUNNING.lock().unwrap().clone() {
             crate::input_service::update_latest_input_cursor_time(conn);
-            handle_mouse_(evt, conn).ok();
+            handle_mouse_(evt, conn, username, argb, simulate, show_cursor).ok();
         } else {
-            crate::input_service::handle_mouse_(evt, conn);
+            crate::input_service::handle_mouse_(evt, conn, username, argb, simulate, show_cursor);
         }
     }
 

src/whiteboard.rs

@@ -0,0 +1,731 @@
+use crate::ipc::{self, new_listener, Connection, Data};
+use hbb_common::{
+    allow_err,
+    anyhow::anyhow,
+    bail, log, sleep,
+    tokio::{
+        self,
+        sync::mpsc::{unbounded_channel, UnboundedReceiver, UnboundedSender},
+        time::interval_at,
+    },
+    ResultType,
+};
+use lazy_static::lazy_static;
+use serde_derive::{Deserialize, Serialize};
+use softbuffer::{Context, Surface};
+use std::{
+    collections::HashMap,
+    num::NonZeroU32,
+    sync::{Arc, RwLock},
+    time::Instant,
+};
+#[cfg(target_os = "linux")]
+use tao::platform::unix::WindowBuilderExtUnix;
+#[cfg(target_os = "windows")]
+use tao::platform::windows::WindowBuilderExtWindows;
+use tao::{
+    event::{Event, WindowEvent},
+    event_loop::{ControlFlow, EventLoopBuilder, EventLoopProxy},
+    window::WindowBuilder,
+};
+use tiny_skia::{Color, FillRule, Paint, PathBuilder, PixmapMut, Point, Stroke, Transform};
+use ttf_parser::Face;
+
+lazy_static! {
+    static ref EVENT_PROXY: RwLock<Option<EventLoopProxy<(String, CustomEvent)>>> =
+        RwLock::new(None);
+    static ref TX_WHITEBOARD: RwLock<Option<UnboundedSender<(String, CustomEvent)>>> =
+        RwLock::new(None);
+    static ref CONNS: RwLock<HashMap<String, Conn>> = Default::default();
+}
+
+struct Conn {
+    last_cursor_pos: (f32, f32), // For click ripple
+    last_cursor_evt: LastCursorEvent,
+}
+
+#[derive(Debug, Serialize, Deserialize, Clone)]
+#[serde(tag = "t", content = "c")]
+pub enum CustomEvent {
+    Cursor(Cursor),
+    Clear,
+    Exit,
+}
+
+#[derive(Debug, Serialize, Deserialize, Clone)]
+#[serde(tag = "t")]
+pub struct Cursor {
+    pub x: f32,
+    pub y: f32,
+    pub argb: u32,
+    pub btns: i32,
+    pub text: String,
+}
+
+struct LastCursorEvent {
+    evt: Option<CustomEvent>,
+    tm: Instant,
+    c: usize,
+}
+
+// A helper struct to bridge `ttf-parser` and `tiny-skia`.
+struct PathBuilderWrapper<'a> {
+    path_builder: &'a mut PathBuilder,
+    transform: Transform,
+}
+
+impl ttf_parser::OutlineBuilder for PathBuilderWrapper<'_> {
+    fn move_to(&mut self, x: f32, y: f32) {
+        let mut pt = Point::from_xy(x, y);
+        self.transform.map_point(&mut pt);
+        self.path_builder.move_to(pt.x, pt.y);
+    }
+
+    fn line_to(&mut self, x: f32, y: f32) {
+        let mut pt = Point::from_xy(x, y);
+        self.transform.map_point(&mut pt);
+        self.path_builder.line_to(pt.x, pt.y);
+    }
+
+    fn quad_to(&mut self, x1: f32, y1: f32, x: f32, y: f32) {
+        let mut pt1 = Point::from_xy(x1, y1);
+        self.transform.map_point(&mut pt1);
+        let mut pt = Point::from_xy(x, y);
+        self.transform.map_point(&mut pt);
+        self.path_builder.quad_to(pt1.x, pt1.y, pt.x, pt.y);
+    }
+
+    fn curve_to(&mut self, x1: f32, y1: f32, x2: f32, y2: f32, x: f32, y: f32) {
+        let mut pt1 = Point::from_xy(x1, y1);
+        self.transform.map_point(&mut pt1);
+        let mut pt2 = Point::from_xy(x2, y2);
+        self.transform.map_point(&mut pt2);
+        let mut pt = Point::from_xy(x, y);
+        self.transform.map_point(&mut pt);
+        self.path_builder
+            .cubic_to(pt1.x, pt1.y, pt2.x, pt2.y, pt.x, pt.y);
+    }
+
+    fn close(&mut self) {
+        self.path_builder.close();
+    }
+}
+
+// Draws a string of text onto the pixmap.
+fn draw_text(
+    pixmap: &mut PixmapMut,
+    face: &Face,
+    text: &str,
+    x: f32,
+    y: f32,
+    paint: &Paint,
+    font_size: f32,
+) {
+    let units_per_em = face.units_per_em() as f32;
+    let scale = font_size / units_per_em;
+    let transform = Transform::from_translate(x, y).pre_scale(scale, -scale);
+
+    let mut path_builder = PathBuilder::new();
+    let mut current_x = 0.0;
+
+    for ch in text.chars() {
+        let glyph_id = face.glyph_index(ch).unwrap_or_default();
+
+        let mut builder = PathBuilderWrapper {
+            path_builder: &mut path_builder,
+            transform: transform.post_translate(current_x, 0.0),
+        };
+
+        face.outline_glyph(glyph_id, &mut builder);
+
+        if let Some(h_advance) = face.glyph_hor_advance(glyph_id) {
+            current_x += h_advance as f32 * scale;
+        }
+    }
+
+    if let Some(path) = path_builder.finish() {
+        pixmap.fill_path(&path, paint, FillRule::Winding, Transform::identity(), None);
+    }
+}
+
+#[inline]
+pub fn get_key_cursor(conn_id: i32) -> String {
+    format!("{}-cursor", conn_id)
+}
+
+pub fn register_whiteboard(k: String) {
+    std::thread::spawn(|| {
+        allow_err!(start_whiteboard_());
+    });
+    let mut conns = CONNS.write().unwrap();
+    if !conns.contains_key(&k) {
+        conns.insert(
+            k,
+            Conn {
+                last_cursor_pos: (0.0, 0.0),
+                last_cursor_evt: LastCursorEvent {
+                    evt: None,
+                    tm: Instant::now(),
+                    c: 0,
+                },
+            },
+        );
+    }
+}
+
+pub fn unregister_whiteboard(k: String) {
+    let mut conns = CONNS.write().unwrap();
+    conns.remove(&k);
+    let is_conns_empty = conns.is_empty();
+    drop(conns);
+
+    TX_WHITEBOARD.read().unwrap().as_ref().map(|tx| {
+        allow_err!(tx.send((k, CustomEvent::Clear)));
+    });
+    if is_conns_empty {
+        std::thread::spawn(|| {
+            let mut whiteboard = TX_WHITEBOARD.write().unwrap();
+            whiteboard.as_ref().map(|tx| {
+                allow_err!(tx.send(("".to_string(), CustomEvent::Exit)));
+                // Simple sleep to wait the whiteboard process exiting.
+                std::thread::sleep(std::time::Duration::from_millis(3_00));
+            });
+            whiteboard.take();
+        });
+    }
+}
+
+pub fn update_whiteboard(k: String, e: CustomEvent) {
+    let mut conns = CONNS.write().unwrap();
+    let Some(conn) = conns.get_mut(&k) else {
+        return;
+    };
+    match &e {
+        CustomEvent::Cursor(cursor) => {
+            conn.last_cursor_evt.c += 1;
+            conn.last_cursor_evt.tm = Instant::now();
+            if cursor.btns == 0 {
+                // Send one movement event every 4.
+                if conn.last_cursor_evt.c > 3 {
+                    conn.last_cursor_evt.c = 0;
+                    conn.last_cursor_evt.evt = None;
+                    tx_send_event(conn, k, e);
+                } else {
+                    conn.last_cursor_evt.evt = Some(e);
+                }
+            } else {
+                if let Some(evt) = conn.last_cursor_evt.evt.take() {
+                    tx_send_event(conn, k.clone(), evt);
+                    conn.last_cursor_evt.c = 0;
+                }
+                let click_evt = CustomEvent::Cursor(Cursor {
+                    x: conn.last_cursor_pos.0,
+                    y: conn.last_cursor_pos.1,
+                    argb: cursor.argb,
+                    btns: cursor.btns,
+                    text: cursor.text.clone(),
+                });
+                tx_send_event(conn, k, click_evt);
+            }
+        }
+        _ => {
+            tx_send_event(conn, k, e);
+        }
+    }
+}
+
+#[inline]
+fn tx_send_event(conn: &mut Conn, k: String, event: CustomEvent) {
+    if let CustomEvent::Cursor(cursor) = &event {
+        if cursor.btns == 0 {
+            conn.last_cursor_pos = (cursor.x, cursor.y);
+        }
+    }
+
+    TX_WHITEBOARD.read().unwrap().as_ref().map(|tx| {
+        allow_err!(tx.send((k, event)));
+    });
+}
+
+#[tokio::main(flavor = "current_thread")]
+async fn start_whiteboard_() -> ResultType<()> {
+    let mut tx_whiteboard = TX_WHITEBOARD.write().unwrap();
+    if tx_whiteboard.is_some() {
+        log::warn!("Whiteboard already started");
+        return Ok(());
+    }
+
+    loop {
+        if !crate::platform::is_prelogin() {
+            break;
+        }
+        sleep(1.).await;
+    }
+    let mut stream = None;
+    if let Ok(s) = ipc::connect(1000, "_whiteboard").await {
+        stream = Some(s);
+    } else {
+        #[allow(unused_mut)]
+        #[allow(unused_assignments)]
+        let mut args = vec!["--whiteboard"];
+        #[allow(unused_mut)]
+        #[cfg(target_os = "linux")]
+        let mut user = None;
+
+        let run_done;
+        if crate::platform::is_root() {
+            let mut res = Ok(None);
+            for _ in 0..10 {
+                #[cfg(not(any(target_os = "linux")))]
+                {
+                    log::debug!("Start whiteboard");
+                    res = crate::platform::run_as_user(args.clone());
+                }
+                #[cfg(target_os = "linux")]
+                {
+                    log::debug!("Start whiteboard");
+                    res = crate::platform::run_as_user(
+                        args.clone(),
+                        user.clone(),
+                        None::<(&str, &str)>,
+                    );
+                }
+                if res.is_ok() {
+                    break;
+                }
+                log::error!("Failed to run whiteboard: {res:?}");
+                sleep(1.).await;
+            }
+            if let Some(task) = res? {
+                super::CHILD_PROCESS.lock().unwrap().push(task);
+            }
+            run_done = true;
+        } else {
+            run_done = false;
+        }
+        if !run_done {
+            log::debug!("Start whiteboard");
+            super::CHILD_PROCESS
+                .lock()
+                .unwrap()
+                .push(crate::run_me(args)?);
+        }
+        for _ in 0..20 {
+            sleep(0.3).await;
+            if let Ok(s) = ipc::connect(1000, "_whiteboard").await {
+                stream = Some(s);
+                break;
+            }
+        }
+        if stream.is_none() {
+            bail!("Failed to connect to connection manager");
+        }
+    }
+
+    let mut stream = stream.ok_or(anyhow!("none stream"))?;
+    let (tx, mut rx) = unbounded_channel();
+    tx_whiteboard.replace(tx);
+    drop(tx_whiteboard);
+    let _call_on_ret = crate::common::SimpleCallOnReturn {
+        b: true,
+        f: Box::new(move || {
+            let _ = TX_WHITEBOARD.write().unwrap().take();
+        }),
+    };
+
+    let dur = tokio::time::Duration::from_millis(300);
+    let mut timer = interval_at(tokio::time::Instant::now() + dur, dur);
+    timer.set_missed_tick_behavior(tokio::time::MissedTickBehavior::Skip);
+    loop {
+        tokio::select! {
+            res = rx.recv() => {
+                match res {
+                    Some(data) => {
+                        if matches!(data.1, CustomEvent::Exit) {
+                            break;
+                        } else {
+                            allow_err!(stream.send(&Data::Whiteboard(data)).await);
+                            timer.reset();
+                        }
+                    }
+                    None => {
+                        bail!("expected");
+                    }
+                }
+            },
+            _ = timer.tick() => {
+                let mut conns = CONNS.write().unwrap();
+                for (k, conn) in conns.iter_mut() {
+                    if conn.last_cursor_evt.tm.elapsed().as_millis() > 300 {
+                        if let Some(evt) = conn.last_cursor_evt.evt.take() {
+                            allow_err!(stream.send(&Data::Whiteboard((k.clone(), evt))).await);
+                            conn.last_cursor_evt.c = 0;
+                        }
+                    }
+                }
+            }
+        }
+    }
+    allow_err!(
+        stream
+            .send(&Data::Whiteboard(("".to_string(), CustomEvent::Exit)))
+            .await
+    );
+    Ok(())
+}
+
+pub fn run() {
+    let (tx_exit, rx_exit) = unbounded_channel();
+    std::thread::spawn(move || {
+        start_ipc(rx_exit);
+    });
+    if let Err(e) = create_event_loop() {
+        log::error!("Failed to create event loop: {}", e);
+        tx_exit.send(()).ok();
+        return;
+    }
+}
+
+#[tokio::main(flavor = "current_thread")]
+async fn start_ipc(mut rx_exit: UnboundedReceiver<()>) {
+    match new_listener("_whiteboard").await {
+        Ok(mut incoming) => loop {
+            tokio::select! {
+                _ = rx_exit.recv() => {
+                    log::info!("Exiting IPC");
+                    break;
+                }
+                res = incoming.next() => match res {
+                    Some(result) => match result {
+                        Ok(stream) => {
+                            log::debug!("Got new connection");
+                            tokio::spawn(handle_new_stream(Connection::new(stream)));
+                        }
+                        Err(err) => {
+                            log::error!("Couldn't get whiteboard client: {:?}", err);
+                        }
+                    },
+                    None => {
+                        log::error!("Failed to get whiteboard client");
+                    }
+                }
+            }
+        },
+        Err(err) => {
+            log::error!("Failed to start whiteboard ipc server: {}", err);
+        }
+    }
+}
+
+async fn handle_new_stream(mut conn: Connection) {
+    loop {
+        tokio::select! {
+            res = conn.next() => {
+                match res {
+                    Err(err) => {
+                        log::info!("whiteboard ipc connection closed: {}", err);
+                        break;
+                    }
+                    Ok(Some(data)) => {
+                        match data {
+                            Data::Whiteboard((k, evt)) => {
+                                if matches!(evt, CustomEvent::Exit) {
+                                    log::info!("whiteboard ipc connection closed");
+                                    break;
+                                } else {
+                                    EVENT_PROXY.read().unwrap().as_ref().map(|ep| {
+                                        allow_err!(ep.send_event((k, evt)));
+                                    });
+                                }
+                            }
+                            _ => {
+
+                            }
+                        }
+                    }
+                    Ok(None) => {
+                        log::info!("whiteboard ipc connection closed");
+                        break;
+                    }
+                }
+            }
+        }
+    }
+    EVENT_PROXY.read().unwrap().as_ref().map(|ep| {
+        allow_err!(ep.send_event(("".to_string(), CustomEvent::Exit)));
+    });
+}
+
+fn create_font_face() -> ResultType<Face<'static>> {
+    let mut font_db = fontdb::Database::new();
+    font_db.load_system_fonts();
+    let query = fontdb::Query {
+        families: &[fontdb::Family::Monospace],
+        ..fontdb::Query::default()
+    };
+    let Some(font_id) = font_db.query(&query) else {
+        bail!("No monospace font found!");
+    };
+    let Some((font_source, face_index)) = font_db.face_source(font_id) else {
+        bail!("No face found for font!");
+    };
+    let font_data: &'static [u8] = Box::leak(match font_source {
+        fontdb::Source::File(path) => std::fs::read(path)?.into_boxed_slice(),
+        fontdb::Source::Binary(data) => data.as_ref().as_ref().to_vec().into_boxed_slice(),
+        fontdb::Source::SharedFile(path, _) => std::fs::read(path)?.into_boxed_slice(),
+    });
+    let face = Face::parse(font_data, face_index)?;
+    Ok(face)
+}
+
+fn create_event_loop() -> ResultType<()> {
+    let face = match create_font_face() {
+        Ok(face) => Some(face),
+        Err(err) => {
+            log::error!("Failed to create font face: {}", err);
+            None
+        }
+    };
+
+    let event_loop = EventLoopBuilder::<(String, CustomEvent)>::with_user_event().build();
+    let mut window_builder = WindowBuilder::new()
+        .with_title("RustDesk whiteboard")
+        .with_transparent(true)
+        .with_always_on_top(true)
+        .with_decorations(false);
+
+    use tao::dpi::{PhysicalPosition, PhysicalSize};
+    let mut final_size = None;
+    if let Ok(displays) = crate::server::display_service::try_get_displays() {
+        let mut min_x = i32::MAX;
+        let mut min_y = i32::MAX;
+        let mut max_x = i32::MIN;
+        let mut max_y = i32::MIN;
+
+        for display in displays {
+            let (x, y) = (display.origin().0 as i32, display.origin().1 as i32);
+            let (w, h) = (display.width() as i32, display.height() as i32);
+            min_x = min_x.min(x);
+            min_y = min_y.min(y);
+            max_x = max_x.max(x + w);
+            max_y = max_y.max(y + h);
+        }
+
+        let (x, y) = (min_x, min_y);
+        let (w, h) = ((max_x - min_x) as u32, (max_y - min_y) as u32);
+
+        if w > 0 && h > 0 {
+            final_size = Some(PhysicalSize::new(w, h));
+            window_builder = window_builder
+                .with_position(PhysicalPosition::new(x, y))
+                .with_inner_size(PhysicalSize::new(1, 1));
+        } else {
+            window_builder =
+                window_builder.with_fullscreen(Some(tao::window::Fullscreen::Borderless(None)));
+        }
+    } else {
+        window_builder =
+            window_builder.with_fullscreen(Some(tao::window::Fullscreen::Borderless(None)));
+    }
+
+    #[cfg(any(target_os = "windows", target_os = "linux"))]
+    {
+        window_builder = window_builder.with_skip_taskbar(true);
+    }
+
+    let window = Arc::new(window_builder.build::<(String, CustomEvent)>(&event_loop)?);
+    window.set_ignore_cursor_events(true)?;
+
+    let context = Context::new(window.clone()).map_err(|e| {
+        log::error!("Failed to create context: {}", e);
+        anyhow!(e.to_string())
+    })?;
+    let mut surface = Surface::new(&context, window.clone()).map_err(|e| {
+        log::error!("Failed to create surface: {}", e);
+        anyhow!(e.to_string())
+    })?;
+
+    let proxy = event_loop.create_proxy();
+    EVENT_PROXY.write().unwrap().replace(proxy);
+    let _call_on_ret = crate::common::SimpleCallOnReturn {
+        b: true,
+        f: Box::new(move || {
+            let _ = EVENT_PROXY.write().unwrap().take();
+        }),
+    };
+
+    struct Ripple {
+        x: f32,
+        y: f32,
+        start_time: Instant,
+    }
+    let mut ripples: Vec<Ripple> = Vec::new();
+    let mut last_cursors: HashMap<String, Cursor> = HashMap::new();
+    let mut resized = final_size.is_none();
+
+    event_loop.run(move |event, _, control_flow| {
+        *control_flow = ControlFlow::Poll;
+
+        match event {
+            Event::WindowEvent { event, .. } => match event {
+                WindowEvent::CloseRequested => {
+                    *control_flow = ControlFlow::Exit;
+                }
+                _ => {}
+            },
+            Event::RedrawRequested(_) => {
+                if !resized {
+                    if let Some(size) = final_size.take() {
+                        window.set_inner_size(size);
+                    }
+                    resized = true;
+                    return;
+                }
+
+                let (width, height) = {
+                    let size = window.inner_size();
+                    (size.width, size.height)
+                };
+
+                let (Some(width), Some(height)) = (NonZeroU32::new(width), NonZeroU32::new(height))
+                else {
+                    return;
+                };
+                if let Err(e) = surface.resize(width, height) {
+                    log::error!("Failed to resize surface: {}", e);
+                    return;
+                }
+
+                let mut buffer = match surface.buffer_mut() {
+                    Ok(buf) => buf,
+                    Err(e) => {
+                        log::error!("Failed to get buffer: {}", e);
+                        return;
+                    }
+                };
+                let Some(mut pixmap) = PixmapMut::from_bytes(
+                    bytemuck::cast_slice_mut(&mut buffer),
+                    width.get(),
+                    height.get(),
+                ) else {
+                    log::error!("Failed to create pixmap from buffer");
+                    return;
+                };
+                pixmap.fill(Color::TRANSPARENT);
+
+                let ripple_duration = std::time::Duration::from_millis(500);
+                ripples.retain(|r| r.start_time.elapsed() < ripple_duration);
+
+                for ripple in &ripples {
+                    let elapsed = ripple.start_time.elapsed();
+                    let progress = elapsed.as_secs_f32() / ripple_duration.as_secs_f32();
+                    let radius = 45.0 * progress;
+                    let alpha = 1.0 - progress;
+
+                    let mut ripple_paint = Paint::default();
+                    // Note: The real color is bgra here.
+                    ripple_paint.set_color_rgba8(128, 128, 255, (alpha * 128.0) as u8);
+                    ripple_paint.anti_alias = true;
+
+                    let mut ripple_pb = PathBuilder::new();
+                    let (rx, ry) = (ripple.x as f64, ripple.y as f64);
+                    ripple_pb.push_circle(rx as f32, ry as f32, radius as f32);
+                    if let Some(path) = ripple_pb.finish() {
+                        pixmap.fill_path(
+                            &path,
+                            &ripple_paint,
+                            FillRule::Winding,
+                            Transform::identity(),
+                            None,
+                        );
+                    }
+                }
+
+                for cursor in last_cursors.values() {
+                    let (x, y) = (cursor.x as f64, cursor.y as f64);
+                    let (x, y) = (x as f32, y as f32);
+                    let size = 1.5 as f32;
+
+                    let mut pb = PathBuilder::new();
+                    pb.move_to(x, y);
+                    pb.line_to(x, y + 16.0 * size);
+                    pb.line_to(x + 4.0 * size, y + 13.0 * size);
+                    pb.line_to(x + 7.0 * size, y + 20.0 * size);
+                    pb.line_to(x + 9.0 * size, y + 19.0 * size);
+                    pb.line_to(x + 6.0 * size, y + 12.0 * size);
+                    pb.line_to(x + 11.0 * size, y + 12.0 * size);
+                    pb.close();
+
+                    if let Some(path) = pb.finish() {
+                        let mut arrow_paint = Paint::default();
+                        // Note: The real color is bgra here.
+                        arrow_paint.set_color_rgba8(
+                            (cursor.argb & 0xFF) as u8,
+                            (cursor.argb >> 8 & 0xFF) as u8,
+                            (cursor.argb >> 16 & 0xFF) as u8,
+                            (cursor.argb >> 24 & 0xFF) as u8,
+                        );
+                        arrow_paint.anti_alias = true;
+                        pixmap.fill_path(
+                            &path,
+                            &arrow_paint,
+                            FillRule::Winding,
+                            Transform::identity(),
+                            None,
+                        );
+
+                        let mut black_paint = Paint::default();
+                        black_paint.set_color_rgba8(0, 0, 0, 255);
+                        black_paint.anti_alias = true;
+                        let mut stroke = Stroke::default();
+                        stroke.width = 1.0 as f32;
+                        pixmap.stroke_path(
+                            &path,
+                            &black_paint,
+                            &stroke,
+                            Transform::identity(),
+                            None,
+                        );
+
+                        face.as_ref().map(|face| {
+                            draw_text(
+                                &mut pixmap,
+                                face,
+                                &cursor.text,
+                                x + 24.0 * size,
+                                y + 24.0 * size,
+                                &arrow_paint,
+                                24.0 as f32,
+                            );
+                        });
+                    }
+                }
+
+                if let Err(e) = buffer.present() {
+                    log::error!("Failed to present surface: {}", e);
+                    return;
+                }
+            }
+            Event::MainEventsCleared => {
+                window.request_redraw();
+            }
+            Event::UserEvent((k, evt)) => match evt {
+                CustomEvent::Cursor(cursor) => {
+                    if cursor.btns != 0 {
+                        ripples.push(Ripple {
+                            x: cursor.x,
+                            y: cursor.y,
+                            start_time: Instant::now(),
+                        });
+                    }
+                    last_cursors.insert(k, cursor);
+                }
+                CustomEvent::Exit => {
+                    *control_flow = ControlFlow::Exit;
+                }
+                _ => {}
+            },
+            _ => (),
+        }
+    });
+}