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_kbd);
 154     g_clear_object(&ddc->iface);
 155     g_clear_pointer(&ddc->listeners, g_hash_table_unref);
 156     g_clear_pointer(&ddc->kbd, qkbd_state_free);
 157
 158     G_OBJECT_CLASS(dbus_display_console_parent_class)->dispose(object);
 159 }
 160
 161 static void
 162 dbus_display_console_class_init(DBusDisplayConsoleClass *klass)
 163 {
 164     GObjectClass *gobject_class = G_OBJECT_CLASS(klass);
 165
 166     gobject_class->dispose = dbus_display_console_dispose;
 167 }
 168
 169 static void
 170 listener_vanished_cb(DBusDisplayListener *listener)
 171 {
 172     DBusDisplayConsole *ddc = dbus_display_listener_get_console(listener);
 173     const char *name = dbus_display_listener_get_bus_name(listener);
 174
 175     trace_dbus_listener_vanished(name);
 176
 177     g_hash_table_remove(ddc->listeners, name);
 178     qkbd_state_lift_all_keys(ddc->kbd);
 179 }
 180
 181 static gboolean
 182 dbus_console_set_ui_info(DBusDisplayConsole *ddc,
 183                          GDBusMethodInvocation *invocation,
 184                          guint16 arg_width_mm,
 185                          guint16 arg_height_mm,
 186                          gint arg_xoff,
 187                          gint arg_yoff,
 188                          guint arg_width,
 189                          guint arg_height)
 190 {
 191     QemuUIInfo info = {
 192         .width_mm = arg_width_mm,
 193         .height_mm = arg_height_mm,
 194         .xoff = arg_xoff,
 195         .yoff = arg_yoff,
 196         .width = arg_width,
 197         .height = arg_height,
 198     };
 199
 200     if (!dpy_ui_info_supported(ddc->dcl.con)) {
 201         g_dbus_method_invocation_return_error(invocation,
 202                                               DBUS_DISPLAY_ERROR,
 203                                               DBUS_DISPLAY_ERROR_UNSUPPORTED,
 204                                               "SetUIInfo is not supported");
 205         return DBUS_METHOD_INVOCATION_HANDLED;
 206     }
 207
 208     dpy_set_ui_info(ddc->dcl.con, &info, false);
 209     qemu_dbus_display1_console_complete_set_uiinfo(ddc->iface, invocation);
 210     return DBUS_METHOD_INVOCATION_HANDLED;
 211 }
 212
 213 #ifdef G_OS_WIN32
 214 bool
 215 dbus_win32_import_socket(GDBusMethodInvocation *invocation,
 216                          GVariant *arg_listener, int *socket)
 217 {
 218     gsize n;
 219     WSAPROTOCOL_INFOW *info = (void *)g_variant_get_fixed_array(arg_listener, &n, 1);
 220
 221     if (!info || n != sizeof(*info)) {
 222         g_dbus_method_invocation_return_error(
 223             invocation,
 224             DBUS_DISPLAY_ERROR,
 225             DBUS_DISPLAY_ERROR_FAILED,
 226             "Failed to get socket infos");
 227         return false;
 228     }
 229
 230     *socket = WSASocketW(FROM_PROTOCOL_INFO,
 231                          FROM_PROTOCOL_INFO,
 232                          FROM_PROTOCOL_INFO,
 233                          info, 0, 0);
 234     if (*socket == INVALID_SOCKET) {
 235         g_autofree gchar *emsg = g_win32_error_message(WSAGetLastError());
 236         g_dbus_method_invocation_return_error(
 237             invocation,
 238             DBUS_DISPLAY_ERROR,
 239             DBUS_DISPLAY_ERROR_FAILED,
 240             "Couldn't create socket: %s", emsg);
 241         return false;
 242     }
 243
 244     return true;
 245 }
 246 #endif
 247
 248 static gboolean
 249 dbus_console_register_listener(DBusDisplayConsole *ddc,
 250                                GDBusMethodInvocation *invocation,
 251 #ifdef G_OS_UNIX
 252                                GUnixFDList *fd_list,
 253 #endif
 254                                GVariant *arg_listener)
 255 {
 256     const char *sender = g_dbus_method_invocation_get_sender(invocation);
 257     GDBusConnection *listener_conn;
 258     g_autoptr(GError) err = NULL;
 259     g_autoptr(GSocket) socket = NULL;
 260     g_autoptr(GSocketConnection) socket_conn = NULL;
 261     g_autofree char *guid = g_dbus_generate_guid();
 262     DBusDisplayListener *listener;
 263     int fd;
 264
 265     if (sender && g_hash_table_contains(ddc->listeners, sender)) {
 266         g_dbus_method_invocation_return_error(
 267             invocation,
 268             DBUS_DISPLAY_ERROR,
 269             DBUS_DISPLAY_ERROR_INVALID,
 270             "`%s` is already registered!",
 271             sender);
 272         return DBUS_METHOD_INVOCATION_HANDLED;
 273     }
 274
 275 #ifdef G_OS_WIN32
 276     if (!dbus_win32_import_socket(invocation, arg_listener, &fd)) {
 277         return DBUS_METHOD_INVOCATION_HANDLED;
 278     }
 279 #else
 280     fd = g_unix_fd_list_get(fd_list, g_variant_get_handle(arg_listener), &err);
 281     if (err) {
 282         g_dbus_method_invocation_return_error(
 283             invocation,
 284             DBUS_DISPLAY_ERROR,
 285             DBUS_DISPLAY_ERROR_FAILED,
 286             "Couldn't get peer fd: %s", err->message);
 287         return DBUS_METHOD_INVOCATION_HANDLED;
 288     }
 289 #endif
 290
 291     socket = g_socket_new_from_fd(fd, &err);
 292     if (err) {
 293         g_dbus_method_invocation_return_error(
 294             invocation,
 295             DBUS_DISPLAY_ERROR,
 296             DBUS_DISPLAY_ERROR_FAILED,
 297             "Couldn't make a socket: %s", err->message);
 298 #ifdef G_OS_WIN32
 299         closesocket(fd);
 300 #else
 301         close(fd);
 302 #endif
 303         return DBUS_METHOD_INVOCATION_HANDLED;
 304     }
 305     socket_conn = g_socket_connection_factory_create_connection(socket);
 306
 307     qemu_dbus_display1_console_complete_register_listener(
 308         ddc->iface, invocation
 309 #ifdef G_OS_UNIX
 310         , NULL
 311 #endif
 312     );
 313
 314     listener_conn = g_dbus_connection_new_sync(
 315         G_IO_STREAM(socket_conn),
 316         guid,
 317         G_DBUS_CONNECTION_FLAGS_AUTHENTICATION_SERVER,
 318         NULL, NULL, &err);
 319     if (err) {
 320         error_report("Failed to setup peer connection: %s", err->message);
 321         return DBUS_METHOD_INVOCATION_HANDLED;
 322     }
 323
 324     listener = dbus_display_listener_new(sender, listener_conn, ddc);
 325     if (!listener) {
 326         return DBUS_METHOD_INVOCATION_HANDLED;
 327     }
 328
 329     g_hash_table_insert(ddc->listeners,
 330                         (gpointer)dbus_display_listener_get_bus_name(listener),
 331                         listener);
 332     g_object_connect(listener_conn,
 333                      "swapped-signal::closed", listener_vanished_cb, listener,
 334                      NULL);
 335
 336     trace_dbus_registered_listener(sender);
 337     return DBUS_METHOD_INVOCATION_HANDLED;
 338 }
 339
 340 static gboolean
 341 dbus_kbd_press(DBusDisplayConsole *ddc,
 342                GDBusMethodInvocation *invocation,
 343                guint arg_keycode)
 344 {
 345     QKeyCode qcode = qemu_input_key_number_to_qcode(arg_keycode);
 346
 347     trace_dbus_kbd_press(arg_keycode);
 348
 349     qkbd_state_key_event(ddc->kbd, qcode, true);
 350
 351     qemu_dbus_display1_keyboard_complete_press(ddc->iface_kbd, invocation);
 352
 353     return DBUS_METHOD_INVOCATION_HANDLED;
 354 }
 355
 356 static gboolean
 357 dbus_kbd_release(DBusDisplayConsole *ddc,
 358                  GDBusMethodInvocation *invocation,
 359                  guint arg_keycode)
 360 {
 361     QKeyCode qcode = qemu_input_key_number_to_qcode(arg_keycode);
 362
 363     trace_dbus_kbd_release(arg_keycode);
 364
 365     qkbd_state_key_event(ddc->kbd, qcode, false);
 366
 367     qemu_dbus_display1_keyboard_complete_release(ddc->iface_kbd, invocation);
 368
 369     return DBUS_METHOD_INVOCATION_HANDLED;
 370 }
 371
 372 static void
 373 dbus_kbd_qemu_leds_updated(void *data, int ledstate)
 374 {
 375     DBusDisplayConsole *ddc = DBUS_DISPLAY_CONSOLE(data);
 376
 377     qemu_dbus_display1_keyboard_set_modifiers(ddc->iface_kbd, ledstate);
 378 }
 379
 380 static gboolean
 381 dbus_mouse_rel_motion(DBusDisplayConsole *ddc,
 382                       GDBusMethodInvocation *invocation,
 383                       int dx, int dy)
 384 {
 385     trace_dbus_mouse_rel_motion(dx, dy);
 386
 387     if (qemu_input_is_absolute()) {
 388         g_dbus_method_invocation_return_error(
 389             invocation, DBUS_DISPLAY_ERROR,
 390             DBUS_DISPLAY_ERROR_INVALID,
 391             "Mouse is not relative");
 392         return DBUS_METHOD_INVOCATION_HANDLED;
 393     }
 394
 395     qemu_input_queue_rel(ddc->dcl.con, INPUT_AXIS_X, dx);
 396     qemu_input_queue_rel(ddc->dcl.con, INPUT_AXIS_Y, dy);
 397     qemu_input_event_sync();
 398
 399     qemu_dbus_display1_mouse_complete_rel_motion(ddc->iface_mouse,
 400                                                     invocation);
 401
 402     return DBUS_METHOD_INVOCATION_HANDLED;
 403 }
 404
 405 static gboolean
 406 dbus_touch_send_event(DBusDisplayConsole *ddc,
 407                       GDBusMethodInvocation *invocation,
 408                       guint kind, uint64_t num_slot,
 409                       double x, double y)
 410 {
 411     Error *error = NULL;
 412     int width, height;
 413     trace_dbus_touch_send_event(kind, num_slot, x, y);
 414
 415     if (kind != INPUT_MULTI_TOUCH_TYPE_BEGIN &&
 416         kind != INPUT_MULTI_TOUCH_TYPE_UPDATE &&
 417         kind != INPUT_MULTI_TOUCH_TYPE_CANCEL &&
 418         kind != INPUT_MULTI_TOUCH_TYPE_END)
 419     {
 420         g_dbus_method_invocation_return_error(
 421             invocation, DBUS_DISPLAY_ERROR,
 422             DBUS_DISPLAY_ERROR_INVALID,
 423             "Invalid touch event kind");
 424         return DBUS_METHOD_INVOCATION_HANDLED;
 425     }
 426     width = qemu_console_get_width(ddc->dcl.con, 0);
 427     height = qemu_console_get_height(ddc->dcl.con, 0);
 428
 429     console_handle_touch_event(ddc->dcl.con, touch_slots,
 430                                num_slot, width, height,
 431                                x, y, kind, &error);
 432     if (error != NULL) {
 433         g_dbus_method_invocation_return_error(
 434             invocation, DBUS_DISPLAY_ERROR,
 435             DBUS_DISPLAY_ERROR_INVALID,
 436             error_get_pretty(error), NULL);
 437         error_free(error);
 438     } else {
 439         qemu_dbus_display1_multi_touch_complete_send_event(ddc->iface_touch,
 440                                                            invocation);
 441     }
 442     return DBUS_METHOD_INVOCATION_HANDLED;
 443 }
 444
 445 static gboolean
 446 dbus_mouse_set_pos(DBusDisplayConsole *ddc,
 447                    GDBusMethodInvocation *invocation,
 448                    guint x, guint y)
 449 {
 450     int width, height;
 451
 452     trace_dbus_mouse_set_pos(x, y);
 453
 454     if (!qemu_input_is_absolute()) {
 455         g_dbus_method_invocation_return_error(
 456             invocation, DBUS_DISPLAY_ERROR,
 457             DBUS_DISPLAY_ERROR_INVALID,
 458             "Mouse is not absolute");
 459         return DBUS_METHOD_INVOCATION_HANDLED;
 460     }
 461
 462     width = qemu_console_get_width(ddc->dcl.con, 0);
 463     height = qemu_console_get_height(ddc->dcl.con, 0);
 464     if (x >= width || y >= height) {
 465         g_dbus_method_invocation_return_error(
 466             invocation, DBUS_DISPLAY_ERROR,
 467             DBUS_DISPLAY_ERROR_INVALID,
 468             "Invalid mouse position");
 469         return DBUS_METHOD_INVOCATION_HANDLED;
 470     }
 471     qemu_input_queue_abs(ddc->dcl.con, INPUT_AXIS_X, x, 0, width);
 472     qemu_input_queue_abs(ddc->dcl.con, INPUT_AXIS_Y, y, 0, height);
 473     qemu_input_event_sync();
 474
 475     qemu_dbus_display1_mouse_complete_set_abs_position(ddc->iface_mouse,
 476                                                           invocation);
 477
 478     return DBUS_METHOD_INVOCATION_HANDLED;
 479 }
 480
 481 static gboolean
 482 dbus_mouse_press(DBusDisplayConsole *ddc,
 483                  GDBusMethodInvocation *invocation,
 484                  guint button)
 485 {
 486     trace_dbus_mouse_press(button);
 487
 488     qemu_input_queue_btn(ddc->dcl.con, button, true);
 489     qemu_input_event_sync();
 490
 491     qemu_dbus_display1_mouse_complete_press(ddc->iface_mouse, invocation);
 492
 493     return DBUS_METHOD_INVOCATION_HANDLED;
 494 }
 495
 496 static gboolean
 497 dbus_mouse_release(DBusDisplayConsole *ddc,
 498                    GDBusMethodInvocation *invocation,
 499                    guint button)
 500 {
 501     trace_dbus_mouse_release(button);
 502
 503     qemu_input_queue_btn(ddc->dcl.con, button, false);
 504     qemu_input_event_sync();
 505
 506     qemu_dbus_display1_mouse_complete_release(ddc->iface_mouse, invocation);
 507
 508     return DBUS_METHOD_INVOCATION_HANDLED;
 509 }
 510
 511 static void
 512 dbus_mouse_update_is_absolute(DBusDisplayConsole *ddc)
 513 {
 514     g_object_set(ddc->iface_mouse,
 515                  "is-absolute", qemu_input_is_absolute(),
 516                  NULL);
 517 }
 518
 519 static void
 520 dbus_mouse_mode_change(Notifier *notify, void *data)
 521 {
 522     DBusDisplayConsole *ddc =
 523         container_of(notify, DBusDisplayConsole, mouse_mode_notifier);
 524
 525     dbus_mouse_update_is_absolute(ddc);
 526 }
 527
 528 int dbus_display_console_get_index(DBusDisplayConsole *ddc)
 529 {
 530     return qemu_console_get_index(ddc->dcl.con);
 531 }
 532
 533 DBusDisplayConsole *
 534 dbus_display_console_new(DBusDisplay *display, QemuConsole *con)
 535 {
 536     g_autofree char *path = NULL;
 537     g_autofree char *label = NULL;
 538     char device_addr[256] = "";
 539     DBusDisplayConsole *ddc;
 540     int idx, i;
 541     const char *interfaces[] = {
 542         "org.qemu.Display1.Keyboard",
 543         "org.qemu.Display1.Mouse",
 544         "org.qemu.Display1.MultiTouch",
 545         NULL
 546     };
 547
 548     assert(display);
 549     assert(con);
 550
 551     label = qemu_console_get_label(con);
 552     idx = qemu_console_get_index(con);
 553     path = g_strdup_printf(DBUS_DISPLAY1_ROOT "/Console_%d", idx);
 554     ddc = g_object_new(DBUS_DISPLAY_TYPE_CONSOLE,
 555                         "g-object-path", path,
 556                         NULL);
 557     ddc->display = display;
 558     ddc->dcl.con = con;
 559     /* handle errors, and skip non graphics? */
 560     qemu_console_fill_device_address(
 561         con, device_addr, sizeof(device_addr), NULL);
 562
 563     ddc->iface = qemu_dbus_display1_console_skeleton_new();
 564     g_object_set(ddc->iface,
 565         "label", label,
 566         "type", qemu_console_is_graphic(con) ? "Graphic" : "Text",
 567         "head", qemu_console_get_head(con),
 568         "width", qemu_console_get_width(con, 0),
 569         "height", qemu_console_get_height(con, 0),
 570         "device-address", device_addr,
 571         "interfaces", interfaces,
 572         NULL);
 573     g_object_connect(ddc->iface,
 574         "swapped-signal::handle-register-listener",
 575         dbus_console_register_listener, ddc,
 576         "swapped-signal::handle-set-uiinfo",
 577         dbus_console_set_ui_info, ddc,
 578         NULL);
 579     g_dbus_object_skeleton_add_interface(G_DBUS_OBJECT_SKELETON(ddc),
 580         G_DBUS_INTERFACE_SKELETON(ddc->iface));
 581
 582     ddc->kbd = qkbd_state_init(con);
 583     ddc->iface_kbd = qemu_dbus_display1_keyboard_skeleton_new();
 584     qemu_add_led_event_handler(dbus_kbd_qemu_leds_updated, ddc);
 585     g_object_connect(ddc->iface_kbd,
 586         "swapped-signal::handle-press", dbus_kbd_press, ddc,
 587         "swapped-signal::handle-release", dbus_kbd_release, ddc,
 588         NULL);
 589     g_dbus_object_skeleton_add_interface(G_DBUS_OBJECT_SKELETON(ddc),
 590         G_DBUS_INTERFACE_SKELETON(ddc->iface_kbd));
 591
 592     ddc->iface_mouse = qemu_dbus_display1_mouse_skeleton_new();
 593     g_object_connect(ddc->iface_mouse,
 594         "swapped-signal::handle-set-abs-position", dbus_mouse_set_pos, ddc,
 595         "swapped-signal::handle-rel-motion", dbus_mouse_rel_motion, ddc,
 596         "swapped-signal::handle-press", dbus_mouse_press, ddc,
 597         "swapped-signal::handle-release", dbus_mouse_release, ddc,
 598         NULL);
 599     g_dbus_object_skeleton_add_interface(G_DBUS_OBJECT_SKELETON(ddc),
 600         G_DBUS_INTERFACE_SKELETON(ddc->iface_mouse));
 601
 602     ddc->iface_touch = qemu_dbus_display1_multi_touch_skeleton_new();
 603     g_object_connect(ddc->iface_touch,
 604         "swapped-signal::handle-send-event", dbus_touch_send_event, ddc,
 605         NULL);
 606     qemu_dbus_display1_multi_touch_set_max_slots(ddc->iface_touch,
 607                                                  INPUT_EVENT_SLOTS_MAX);
 608     g_dbus_object_skeleton_add_interface(G_DBUS_OBJECT_SKELETON(ddc),
 609         G_DBUS_INTERFACE_SKELETON(ddc->iface_touch));
 610
 611     for (i = 0; i < INPUT_EVENT_SLOTS_MAX; i++) {
 612         struct touch_slot *slot = &touch_slots[i];
 613         slot->tracking_id = -1;
 614     }
 615
 616     register_displaychangelistener(&ddc->dcl);
 617     ddc->mouse_mode_notifier.notify = dbus_mouse_mode_change;
 618     qemu_add_mouse_mode_change_notifier(&ddc->mouse_mode_notifier);
 619     dbus_mouse_update_is_absolute(ddc);
 620
 621     return ddc;
 622 }