ui/dbus: implement Unix.Map

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Akihiko Odaki <akihiko.odaki@daynix.com>
Message-ID: <20241008125028.1177932-17-marcandre.lureau@redhat.com>

ui/dbus-listener.c

@@ -83,6 +83,8 @@ struct _DBusDisplayListener {
 #ifdef CONFIG_OPENGL
     egl_fb fb;
 #endif
+#else /* !WIN32 */
+    QemuDBusDisplay1ListenerUnixMap *map_proxy;
 #endif
 
     guint dbus_filter;
@@ -441,6 +443,51 @@ dbus_scanout_share_d3d_texture(
     return true;
 }
 #endif /* CONFIG_OPENGL */
+#else /* !WIN32 */
+static bool dbus_scanout_map(DBusDisplayListener *ddl)
+{
+    g_autoptr(GError) err = NULL;
+    g_autoptr(GUnixFDList) fd_list = NULL;
+
+    if (ddl->ds_share == SHARE_KIND_MAPPED) {
+        return true;
+    }
+
+    if (!ddl->can_share_map || ddl->ds->shmfd == -1) {
+        return false;
+    }
+
+    ddl_discard_display_messages(ddl);
+    fd_list = g_unix_fd_list_new();
+    if (g_unix_fd_list_append(fd_list, ddl->ds->shmfd, &err) != 0) {
+        g_debug("Failed to setup scanout map fdlist: %s", err->message);
+        ddl->can_share_map = false;
+        return false;
+    }
+
+    if (!qemu_dbus_display1_listener_unix_map_call_scanout_map_sync(
+            ddl->map_proxy,
+            g_variant_new_handle(0),
+            ddl->ds->shmfd_offset,
+            surface_width(ddl->ds),
+            surface_height(ddl->ds),
+            surface_stride(ddl->ds),
+            surface_format(ddl->ds),
+            G_DBUS_CALL_FLAGS_NONE,
+            DBUS_DEFAULT_TIMEOUT,
+            fd_list,
+            NULL,
+            NULL,
+            &err)) {
+        g_debug("Failed to call ScanoutMap: %s", err->message);
+        ddl->can_share_map = false;
+        return false;
+    }
+
+    ddl->ds_share = SHARE_KIND_MAPPED;
+
+    return true;
+}
 #endif /* WIN32 */
 
 #ifdef CONFIG_OPENGL
@@ -693,16 +740,22 @@ static void dbus_gfx_update(DisplayChangeListener *dcl,
 
     trace_dbus_update(x, y, w, h);
 
-#ifdef WIN32
     if (dbus_scanout_map(ddl)) {
+#ifdef WIN32
         qemu_dbus_display1_listener_win32_map_call_update_map(
             ddl->map_proxy,
             x, y, w, h,
             G_DBUS_CALL_FLAGS_NONE,
             DBUS_DEFAULT_TIMEOUT, NULL, NULL, NULL);
+#else
+        qemu_dbus_display1_listener_unix_map_call_update_map(
+            ddl->map_proxy,
+            x, y, w, h,
+            G_DBUS_CALL_FLAGS_NONE,
+            DBUS_DEFAULT_TIMEOUT, NULL, NULL, NULL);
+#endif
         return;
     }
-#endif
 
     if (x == 0 && y == 0 && w == surface_width(ddl->ds) && h == surface_height(ddl->ds)) {
         return ddl_scanout(ddl);
@@ -879,7 +932,6 @@ dbus_display_listener_get_console(DBusDisplayListener *ddl)
     return ddl->console;
 }
 
-#ifdef WIN32
 static bool
 dbus_display_listener_implements(DBusDisplayListener *ddl, const char *iface)
 {
@@ -894,6 +946,7 @@ dbus_display_listener_implements(DBusDisplayListener *ddl, const char *iface)
     return implements;
 }
 
+#ifdef WIN32
 static bool
 dbus_display_listener_setup_peer_process(DBusDisplayListener *ddl)
 {
@@ -976,10 +1029,11 @@ dbus_display_listener_setup_d3d11(DBusDisplayListener *ddl)
 static void
 dbus_display_listener_setup_shared_map(DBusDisplayListener *ddl)
 {
-#ifdef WIN32
     g_autoptr(GError) err = NULL;
 
-    if (!dbus_display_listener_implements(ddl, "org.qemu.Display1.Listener.Win32.Map")) {
+#ifdef WIN32
+    if (!dbus_display_listener_implements(
+            ddl, "org.qemu.Display1.Listener.Win32.Map")) {
         return;
     }
 
@@ -999,6 +1053,20 @@ dbus_display_listener_setup_shared_map(DBusDisplayListener *ddl)
         return;
     }
 
+    ddl->can_share_map = true;
+#else /* !WIN32 */
+    if (!dbus_display_listener_implements(
+            ddl, "org.qemu.Display1.Listener.Unix.Map")) {
+        return;
+    }
+    ddl->map_proxy = qemu_dbus_display1_listener_unix_map_proxy_new_sync(
+        ddl->conn, G_DBUS_PROXY_FLAGS_DO_NOT_AUTO_START, NULL,
+        "/org/qemu/Display1/Listener", NULL, &err);
+    if (!ddl->map_proxy) {
+        g_debug("Failed to setup Unix map proxy: %s", err->message);
+        return;
+    }
+
     ddl->can_share_map = true;
 #endif
 }