ui/dbus-console.c

   1 /*
   2  * QEMU DBus display console
   3  *
   4  * Copyright (c) 2021 Marc-André Lureau <marcandre.lureau@redhat.com>
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a copy
   7  * of this software and associated documentation files (the "Software"), to deal
   8  * in the Software without restriction, including without limitation the rights
   9  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  10  * copies of the Software, and to permit persons to whom the Software is
  11  * furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included in
  14  * all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  22  * THE SOFTWARE.
  23  */
  24 #include "qemu/osdep.h"
  25 #include "qemu/error-report.h"
  26 #include "qapi/error.h"
  27 #include "ui/input.h"
  28 #include "ui/kbd-state.h"
  29 #include "trace.h"
  30
  31 #ifdef G_OS_UNIX
  32 #include <gio/gunixfdlist.h>
  33 #endif
  34
  35 #include "dbus.h"
  36
  37 static struct touch_slot touch_slots[INPUT_EVENT_SLOTS_MAX];
  38
  39 struct _DBusDisplayConsole {
  40     GDBusObjectSkeleton parent_instance;
  41     DisplayChangeListener dcl;
  42
  43     DBusDisplay *display;
  44     GHashTable *listeners;
  45     QemuDBusDisplay1Console *iface;
  46
  47     QemuDBusDisplay1Keyboard *iface_kbd;
  48     QKbdState *kbd;
  49
  50     QemuDBusDisplay1Mouse *iface_mouse;
  51     QemuDBusDisplay1MultiTouch *iface_touch;
  52     gboolean last_set;
  53     guint last_x;
  54     guint last_y;
  55     Notifier mouse_mode_notifier;
  56 };
  57
  58 G_DEFINE_TYPE(DBusDisplayConsole,
  59               dbus_display_console,
  60               G_TYPE_DBUS_OBJECT_SKELETON)
  61
  62 static void
  63 dbus_display_console_set_size(DBusDisplayConsole *ddc,
  64                               uint32_t width, uint32_t height)
  65 {
  66     g_object_set(ddc->iface,
  67                  "width", width,
  68                  "height", height,
  69                  NULL);
  70 }
  71
  72 static void
  73 dbus_gfx_switch(DisplayChangeListener *dcl,
  74                 struct DisplaySurface *new_surface)
  75 {
  76     DBusDisplayConsole *ddc = container_of(dcl, DBusDisplayConsole, dcl);
  77
  78     dbus_display_console_set_size(ddc,
  79                                   surface_width(new_surface),
  80                                   surface_height(new_surface));
  81 }
  82
  83 static void
  84 dbus_gfx_update(DisplayChangeListener *dcl,
  85                 int x, int y, int w, int h)
  86 {
  87 }
  88
  89 static void
  90 dbus_gl_scanout_disable(DisplayChangeListener *dcl)
  91 {
  92 }
  93
  94 static void
  95 dbus_gl_scanout_texture(DisplayChangeListener *dcl,
  96                         uint32_t tex_id,
  97                         bool backing_y_0_top,
  98                         uint32_t backing_width,
  99                         uint32_t backing_height,
 100                         uint32_t x, uint32_t y,
 101                         uint32_t w, uint32_t h,
 102                         void *d3d_tex2d)
 103 {
 104     DBusDisplayConsole *ddc = container_of(dcl, DBusDisplayConsole, dcl);
 105
 106     dbus_display_console_set_size(ddc, w, h);
 107 }
 108
 109 static void
 110 dbus_gl_scanout_dmabuf(DisplayChangeListener *dcl,
 111                        QemuDmaBuf *dmabuf)
 112 {
 113     DBusDisplayConsole *ddc = container_of(dcl, DBusDisplayConsole, dcl);
 114
 115     dbus_display_console_set_size(ddc,
 116                                   dmabuf->width,
 117                                   dmabuf->height);
 118 }
 119
 120 static void
 121 dbus_gl_scanout_update(DisplayChangeListener *dcl,
 122                        uint32_t x, uint32_t y,
 123                        uint32_t w, uint32_t h)
 124 {
 125 }
 126
 127 const DisplayChangeListenerOps dbus_console_dcl_ops = {
 128     .dpy_name                = "dbus-console",
 129     .dpy_gfx_switch          = dbus_gfx_switch,
 130     .dpy_gfx_update          = dbus_gfx_update,
 131     .dpy_gl_scanout_disable  = dbus_gl_scanout_disable,
 132     .dpy_gl_scanout_texture  = dbus_gl_scanout_texture,
 133     .dpy_gl_scanout_dmabuf   = dbus_gl_scanout_dmabuf,
 134     .dpy_gl_update           = dbus_gl_scanout_update,
 135 };
 136
 137 static void
 138 dbus_display_console_init(DBusDisplayConsole *object)
 139 {
 140     DBusDisplayConsole *ddc = DBUS_DISPLAY_CONSOLE(object);
 141
 142     ddc->listeners = g_hash_table_new_full(g_str_hash, g_str_equal,
 143                                             NULL, g_object_unref);
 144     ddc->dcl.ops = &dbus_console_dcl_ops;
 145 }
 146
 147 static void
 148 dbus_display_console_dispose(GObject *object)
 149 {
 150     DBusDisplayConsole *ddc = DBUS_DISPLAY_CONSOLE(object);
 151
 152     unregister_displaychangelistener(&ddc->dcl);
 153     g_clear_object(&ddc->iface_touch);
 154     g_clear_object(&ddc->iface_mouse);
 155     g_clear_object(&ddc->iface_kbd);
 156     g_clear_object(&ddc->iface);
 157     g_clear_pointer(&ddc->listeners, g_hash_table_unref);
 158     g_clear_pointer(&ddc->kbd, qkbd_state_free);
 159
 160     G_OBJECT_CLASS(dbus_display_console_parent_class)->dispose(object);
 161 }
 162
 163 static void
 164 dbus_display_console_class_init(DBusDisplayConsoleClass *klass)
 165 {
 166     GObjectClass *gobject_class = G_OBJECT_CLASS(klass);
 167
 168     gobject_class->dispose = dbus_display_console_dispose;
 169 }
 170
 171 static void
 172 listener_vanished_cb(DBusDisplayListener *listener)
 173 {
 174     DBusDisplayConsole *ddc = dbus_display_listener_get_console(listener);
 175     const char *name = dbus_display_listener_get_bus_name(listener);
 176
 177     trace_dbus_listener_vanished(name);
 178
 179     g_hash_table_remove(ddc->listeners, name);
 180     qkbd_state_lift_all_keys(ddc->kbd);
 181 }
 182
 183 static gboolean
 184 dbus_console_set_ui_info(DBusDisplayConsole *ddc,
 185                          GDBusMethodInvocation *invocation,
 186                          guint16 arg_width_mm,
 187                          guint16 arg_height_mm,
 188                          gint arg_xoff,
 189                          gint arg_yoff,
 190                          guint arg_width,
 191                          guint arg_height)
 192 {
 193     QemuUIInfo info = {
 194         .width_mm = arg_width_mm,
 195         .height_mm = arg_height_mm,
 196         .xoff = arg_xoff,
 197         .yoff = arg_yoff,
 198         .width = arg_width,
 199         .height = arg_height,
 200     };
 201
 202     if (!dpy_ui_info_supported(ddc->dcl.con)) {
 203         g_dbus_method_invocation_return_error(invocation,
 204                                               DBUS_DISPLAY_ERROR,
 205                                               DBUS_DISPLAY_ERROR_UNSUPPORTED,
 206                                               "SetUIInfo is not supported");
 207         return DBUS_METHOD_INVOCATION_HANDLED;
 208     }
 209
 210     dpy_set_ui_info(ddc->dcl.con, &info, false);
 211     qemu_dbus_display1_console_complete_set_uiinfo(ddc->iface, invocation);
 212     return DBUS_METHOD_INVOCATION_HANDLED;
 213 }
 214
 215 #ifdef G_OS_WIN32
 216 bool
 217 dbus_win32_import_socket(GDBusMethodInvocation *invocation,
 218                          GVariant *arg_listener, int *socket)
 219 {
 220     gsize n;
 221     WSAPROTOCOL_INFOW *info = (void *)g_variant_get_fixed_array(arg_listener, &n, 1);
 222
 223     if (!info || n != sizeof(*info)) {
 224         g_dbus_method_invocation_return_error(
 225             invocation,
 226             DBUS_DISPLAY_ERROR,
 227             DBUS_DISPLAY_ERROR_FAILED,
 228             "Failed to get socket infos");
 229         return false;
 230     }
 231
 232     *socket = WSASocketW(FROM_PROTOCOL_INFO,
 233                          FROM_PROTOCOL_INFO,
 234                          FROM_PROTOCOL_INFO,
 235                          info, 0, 0);
 236     if (*socket == INVALID_SOCKET) {
 237         g_autofree gchar *emsg = g_win32_error_message(WSAGetLastError());
 238         g_dbus_method_invocation_return_error(
 239             invocation,
 240             DBUS_DISPLAY_ERROR,
 241             DBUS_DISPLAY_ERROR_FAILED,
 242             "Couldn't create socket: %s", emsg);
 243         return false;
 244     }
 245
 246     return true;
 247 }
 248 #endif
 249
 250 static gboolean
 251 dbus_console_register_listener(DBusDisplayConsole *ddc,
 252                                GDBusMethodInvocation *invocation,
 253 #ifdef G_OS_UNIX
 254                                GUnixFDList *fd_list,
 255 #endif
 256                                GVariant *arg_listener)
 257 {
 258     const char *sender = g_dbus_method_invocation_get_sender(invocation);
 259     GDBusConnection *listener_conn;
 260     g_autoptr(GError) err = NULL;
 261     g_autoptr(GSocket) socket = NULL;
 262     g_autoptr(GSocketConnection) socket_conn = NULL;
 263     g_autofree char *guid = g_dbus_generate_guid();
 264     DBusDisplayListener *listener;
 265     int fd;
 266
 267     if (sender && g_hash_table_contains(ddc->listeners, sender)) {
 268         g_dbus_method_invocation_return_error(
 269             invocation,
 270             DBUS_DISPLAY_ERROR,
 271             DBUS_DISPLAY_ERROR_INVALID,
 272             "`%s` is already registered!",
 273             sender);
 274         return DBUS_METHOD_INVOCATION_HANDLED;
 275     }
 276
 277 #ifdef G_OS_WIN32
 278     if (!dbus_win32_import_socket(invocation, arg_listener, &fd)) {
 279         return DBUS_METHOD_INVOCATION_HANDLED;
 280     }
 281 #else
 282     fd = g_unix_fd_list_get(fd_list, g_variant_get_handle(arg_listener), &err);
 283     if (err) {
 284         g_dbus_method_invocation_return_error(
 285             invocation,
 286             DBUS_DISPLAY_ERROR,
 287             DBUS_DISPLAY_ERROR_FAILED,
 288             "Couldn't get peer fd: %s", err->message);
 289         return DBUS_METHOD_INVOCATION_HANDLED;
 290     }
 291 #endif
 292
 293     socket = g_socket_new_from_fd(fd, &err);
 294     if (err) {
 295         g_dbus_method_invocation_return_error(
 296             invocation,
 297             DBUS_DISPLAY_ERROR,
 298             DBUS_DISPLAY_ERROR_FAILED,
 299             "Couldn't make a socket: %s", err->message);
 300 #ifdef G_OS_WIN32
 301         closesocket(fd);
 302 #else
 303         close(fd);
 304 #endif
 305         return DBUS_METHOD_INVOCATION_HANDLED;
 306     }
 307     socket_conn = g_socket_connection_factory_create_connection(socket);
 308
 309     qemu_dbus_display1_console_complete_register_listener(
 310         ddc->iface, invocation
 311 #ifdef G_OS_UNIX
 312         , NULL
 313 #endif
 314     );
 315
 316     listener_conn = g_dbus_connection_new_sync(
 317         G_IO_STREAM(socket_conn),
 318         guid,
 319         G_DBUS_CONNECTION_FLAGS_AUTHENTICATION_SERVER,
 320         NULL, NULL, &err);
 321     if (err) {
 322         error_report("Failed to setup peer connection: %s", err->message);
 323         return DBUS_METHOD_INVOCATION_HANDLED;
 324     }
 325
 326     listener = dbus_display_listener_new(sender, listener_conn, ddc);
 327     if (!listener) {
 328         return DBUS_METHOD_INVOCATION_HANDLED;
 329     }
 330
 331     g_hash_table_insert(ddc->listeners,
 332                         (gpointer)dbus_display_listener_get_bus_name(listener),
 333                         listener);
 334     g_object_connect(listener_conn,
 335                      "swapped-signal::closed", listener_vanished_cb, listener,
 336                      NULL);
 337
 338     trace_dbus_registered_listener(sender);
 339     return DBUS_METHOD_INVOCATION_HANDLED;
 340 }
 341
 342 static gboolean
 343 dbus_kbd_press(DBusDisplayConsole *ddc,
 344                GDBusMethodInvocation *invocation,
 345                guint arg_keycode)
 346 {
 347     QKeyCode qcode = qemu_input_key_number_to_qcode(arg_keycode);
 348
 349     trace_dbus_kbd_press(arg_keycode);
 350
 351     qkbd_state_key_event(ddc->kbd, qcode, true);
 352
 353     qemu_dbus_display1_keyboard_complete_press(ddc->iface_kbd, invocation);
 354
 355     return DBUS_METHOD_INVOCATION_HANDLED;
 356 }
 357
 358 static gboolean
 359 dbus_kbd_release(DBusDisplayConsole *ddc,
 360                  GDBusMethodInvocation *invocation,
 361                  guint arg_keycode)
 362 {
 363     QKeyCode qcode = qemu_input_key_number_to_qcode(arg_keycode);
 364
 365     trace_dbus_kbd_release(arg_keycode);
 366
 367     qkbd_state_key_event(ddc->kbd, qcode, false);
 368
 369     qemu_dbus_display1_keyboard_complete_release(ddc->iface_kbd, invocation);
 370
 371     return DBUS_METHOD_INVOCATION_HANDLED;
 372 }
 373
 374 static void
 375 dbus_kbd_qemu_leds_updated(void *data, int ledstate)
 376 {
 377     DBusDisplayConsole *ddc = DBUS_DISPLAY_CONSOLE(data);
 378
 379     qemu_dbus_display1_keyboard_set_modifiers(ddc->iface_kbd, ledstate);
 380 }
 381
 382 static gboolean
 383 dbus_mouse_rel_motion(DBusDisplayConsole *ddc,
 384                       GDBusMethodInvocation *invocation,
 385                       int dx, int dy)
 386 {
 387     trace_dbus_mouse_rel_motion(dx, dy);
 388
 389     if (qemu_input_is_absolute(ddc->dcl.con)) {
 390         g_dbus_method_invocation_return_error(
 391             invocation, DBUS_DISPLAY_ERROR,
 392             DBUS_DISPLAY_ERROR_INVALID,
 393             "Mouse is not relative");
 394         return DBUS_METHOD_INVOCATION_HANDLED;
 395     }
 396
 397     qemu_input_queue_rel(ddc->dcl.con, INPUT_AXIS_X, dx);
 398     qemu_input_queue_rel(ddc->dcl.con, INPUT_AXIS_Y, dy);
 399     qemu_input_event_sync();
 400
 401     qemu_dbus_display1_mouse_complete_rel_motion(ddc->iface_mouse,
 402                                                     invocation);
 403
 404     return DBUS_METHOD_INVOCATION_HANDLED;
 405 }
 406
 407 static gboolean
 408 dbus_touch_send_event(DBusDisplayConsole *ddc,
 409                       GDBusMethodInvocation *invocation,
 410                       guint kind, uint64_t num_slot,
 411                       double x, double y)
 412 {
 413     Error *error = NULL;
 414     int width, height;
 415     trace_dbus_touch_send_event(kind, num_slot, x, y);
 416
 417     if (kind != INPUT_MULTI_TOUCH_TYPE_BEGIN &&
 418         kind != INPUT_MULTI_TOUCH_TYPE_UPDATE &&
 419         kind != INPUT_MULTI_TOUCH_TYPE_CANCEL &&
 420         kind != INPUT_MULTI_TOUCH_TYPE_END)
 421     {
 422         g_dbus_method_invocation_return_error(
 423             invocation, DBUS_DISPLAY_ERROR,
 424             DBUS_DISPLAY_ERROR_INVALID,
 425             "Invalid touch event kind");
 426         return DBUS_METHOD_INVOCATION_HANDLED;
 427     }
 428     width = qemu_console_get_width(ddc->dcl.con, 0);
 429     height = qemu_console_get_height(ddc->dcl.con, 0);
 430
 431     console_handle_touch_event(ddc->dcl.con, touch_slots,
 432                                num_slot, width, height,
 433                                x, y, kind, &error);
 434     if (error != NULL) {
 435         g_dbus_method_invocation_return_error(
 436             invocation, DBUS_DISPLAY_ERROR,
 437             DBUS_DISPLAY_ERROR_INVALID,
 438             error_get_pretty(error), NULL);
 439         error_free(error);
 440     } else {
 441         qemu_dbus_display1_multi_touch_complete_send_event(ddc->iface_touch,
 442                                                            invocation);
 443     }
 444     return DBUS_METHOD_INVOCATION_HANDLED;
 445 }
 446
 447 static gboolean
 448 dbus_mouse_set_pos(DBusDisplayConsole *ddc,
 449                    GDBusMethodInvocation *invocation,
 450                    guint x, guint y)
 451 {
 452     int width, height;
 453
 454     trace_dbus_mouse_set_pos(x, y);
 455
 456     if (!qemu_input_is_absolute(ddc->dcl.con)) {
 457         g_dbus_method_invocation_return_error(
 458             invocation, DBUS_DISPLAY_ERROR,
 459             DBUS_DISPLAY_ERROR_INVALID,
 460             "Mouse is not absolute");
 461         return DBUS_METHOD_INVOCATION_HANDLED;
 462     }
 463
 464     width = qemu_console_get_width(ddc->dcl.con, 0);
 465     height = qemu_console_get_height(ddc->dcl.con, 0);
 466     if (x >= width || y >= height) {
 467         g_dbus_method_invocation_return_error(
 468             invocation, DBUS_DISPLAY_ERROR,
 469             DBUS_DISPLAY_ERROR_INVALID,
 470             "Invalid mouse position");
 471         return DBUS_METHOD_INVOCATION_HANDLED;
 472     }
 473     qemu_input_queue_abs(ddc->dcl.con, INPUT_AXIS_X, x, 0, width);
 474     qemu_input_queue_abs(ddc->dcl.con, INPUT_AXIS_Y, y, 0, height);
 475     qemu_input_event_sync();
 476
 477     qemu_dbus_display1_mouse_complete_set_abs_position(ddc->iface_mouse,
 478                                                           invocation);
 479
 480     return DBUS_METHOD_INVOCATION_HANDLED;
 481 }
 482
 483 static gboolean
 484 dbus_mouse_press(DBusDisplayConsole *ddc,
 485                  GDBusMethodInvocation *invocation,
 486                  guint button)
 487 {
 488     trace_dbus_mouse_press(button);
 489
 490     qemu_input_queue_btn(ddc->dcl.con, button, true);
 491     qemu_input_event_sync();
 492
 493     qemu_dbus_display1_mouse_complete_press(ddc->iface_mouse, invocation);
 494
 495     return DBUS_METHOD_INVOCATION_HANDLED;
 496 }
 497
 498 static gboolean
 499 dbus_mouse_release(DBusDisplayConsole *ddc,
 500                    GDBusMethodInvocation *invocation,
 501                    guint button)
 502 {
 503     trace_dbus_mouse_release(button);
 504
 505     qemu_input_queue_btn(ddc->dcl.con, button, false);
 506     qemu_input_event_sync();
 507
 508     qemu_dbus_display1_mouse_complete_release(ddc->iface_mouse, invocation);
 509
 510     return DBUS_METHOD_INVOCATION_HANDLED;
 511 }
 512
 513 static void
 514 dbus_mouse_update_is_absolute(DBusDisplayConsole *ddc)
 515 {
 516     g_object_set(ddc->iface_mouse,
 517                  "is-absolute", qemu_input_is_absolute(ddc->dcl.con),
 518                  NULL);
 519 }
 520
 521 static void
 522 dbus_mouse_mode_change(Notifier *notify, void *data)
 523 {
 524     DBusDisplayConsole *ddc =
 525         container_of(notify, DBusDisplayConsole, mouse_mode_notifier);
 526
 527     dbus_mouse_update_is_absolute(ddc);
 528 }
 529
 530 int dbus_display_console_get_index(DBusDisplayConsole *ddc)
 531 {
 532     return qemu_console_get_index(ddc->dcl.con);
 533 }
 534
 535 DBusDisplayConsole *
 536 dbus_display_console_new(DBusDisplay *display, QemuConsole *con)
 537 {
 538     g_autofree char *path = NULL;
 539     g_autofree char *label = NULL;
 540     char device_addr[256] = "";
 541     DBusDisplayConsole *ddc;
 542     int idx, i;
 543     const char *interfaces[] = {
 544         "org.qemu.Display1.Keyboard",
 545         "org.qemu.Display1.Mouse",
 546         "org.qemu.Display1.MultiTouch",
 547         NULL
 548     };
 549
 550     assert(display);
 551     assert(con);
 552
 553     label = qemu_console_get_label(con);
 554     idx = qemu_console_get_index(con);
 555     path = g_strdup_printf(DBUS_DISPLAY1_ROOT "/Console_%d", idx);
 556     ddc = g_object_new(DBUS_DISPLAY_TYPE_CONSOLE,
 557                         "g-object-path", path,
 558                         NULL);
 559     ddc->display = display;
 560     ddc->dcl.con = con;
 561     /* handle errors, and skip non graphics? */
 562     qemu_console_fill_device_address(
 563         con, device_addr, sizeof(device_addr), NULL);
 564
 565     ddc->iface = qemu_dbus_display1_console_skeleton_new();
 566     g_object_set(ddc->iface,
 567         "label", label,
 568         "type", qemu_console_is_graphic(con) ? "Graphic" : "Text",
 569         "head", qemu_console_get_head(con),
 570         "width", qemu_console_get_width(con, 0),
 571         "height", qemu_console_get_height(con, 0),
 572         "device-address", device_addr,
 573         "interfaces", interfaces,
 574         NULL);
 575     g_object_connect(ddc->iface,
 576         "swapped-signal::handle-register-listener",
 577         dbus_console_register_listener, ddc,
 578         "swapped-signal::handle-set-uiinfo",
 579         dbus_console_set_ui_info, ddc,
 580         NULL);
 581     g_dbus_object_skeleton_add_interface(G_DBUS_OBJECT_SKELETON(ddc),
 582         G_DBUS_INTERFACE_SKELETON(ddc->iface));
 583
 584     ddc->kbd = qkbd_state_init(con);
 585     ddc->iface_kbd = qemu_dbus_display1_keyboard_skeleton_new();
 586     qemu_add_led_event_handler(dbus_kbd_qemu_leds_updated, ddc);
 587     g_object_connect(ddc->iface_kbd,
 588         "swapped-signal::handle-press", dbus_kbd_press, ddc,
 589         "swapped-signal::handle-release", dbus_kbd_release, ddc,
 590         NULL);
 591     g_dbus_object_skeleton_add_interface(G_DBUS_OBJECT_SKELETON(ddc),
 592         G_DBUS_INTERFACE_SKELETON(ddc->iface_kbd));
 593
 594     ddc->iface_mouse = qemu_dbus_display1_mouse_skeleton_new();
 595     g_object_connect(ddc->iface_mouse,
 596         "swapped-signal::handle-set-abs-position", dbus_mouse_set_pos, ddc,
 597         "swapped-signal::handle-rel-motion", dbus_mouse_rel_motion, ddc,
 598         "swapped-signal::handle-press", dbus_mouse_press, ddc,
 599         "swapped-signal::handle-release", dbus_mouse_release, ddc,
 600         NULL);
 601     g_dbus_object_skeleton_add_interface(G_DBUS_OBJECT_SKELETON(ddc),
 602         G_DBUS_INTERFACE_SKELETON(ddc->iface_mouse));
 603
 604     ddc->iface_touch = qemu_dbus_display1_multi_touch_skeleton_new();
 605     g_object_connect(ddc->iface_touch,
 606         "swapped-signal::handle-send-event", dbus_touch_send_event, ddc,
 607         NULL);
 608     qemu_dbus_display1_multi_touch_set_max_slots(ddc->iface_touch,
 609                                                  INPUT_EVENT_SLOTS_MAX);
 610     g_dbus_object_skeleton_add_interface(G_DBUS_OBJECT_SKELETON(ddc),
 611         G_DBUS_INTERFACE_SKELETON(ddc->iface_touch));
 612
 613     for (i = 0; i < INPUT_EVENT_SLOTS_MAX; i++) {
 614         struct touch_slot *slot = &touch_slots[i];
 615         slot->tracking_id = -1;
 616     }
 617
 618     register_displaychangelistener(&ddc->dcl);
 619     ddc->mouse_mode_notifier.notify = dbus_mouse_mode_change;
 620     qemu_add_mouse_mode_change_notifier(&ddc->mouse_mode_notifier);
 621     dbus_mouse_update_is_absolute(ddc);
 622
 623     return ddc;
 624 }