ui/sdl2.c

   1 /*
   2  * QEMU SDL display driver
   3  *
   4  * Copyright (c) 2003 Fabrice Bellard
   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 /* Ported SDL 1.2 code to 2.0 by Dave Airlie. */
  25
  26 #include "qemu/osdep.h"
  27 #include "qemu-common.h"
  28 #include "ui/console.h"
  29 #include "ui/input.h"
  30 #include "ui/sdl2.h"
  31 #include "sysemu/sysemu.h"
  32
  33 static int sdl2_num_outputs;
  34 static struct sdl2_console *sdl2_console;
  35 static DisplayOptions *opts;
  36
  37 static SDL_Surface *guest_sprite_surface;
  38 static int gui_grab; /* if true, all keyboard/mouse events are grabbed */
  39
  40 static int gui_saved_grab;
  41 static int gui_fullscreen;
  42 static int gui_keysym;
  43 static int gui_grab_code = KMOD_LALT | KMOD_LCTRL;
  44 static SDL_Cursor *sdl_cursor_normal;
  45 static SDL_Cursor *sdl_cursor_hidden;
  46 static int absolute_enabled;
  47 static int guest_cursor;
  48 static int guest_x, guest_y;
  49 static SDL_Cursor *guest_sprite;
  50 static Notifier mouse_mode_notifier;
  51
  52 #define SDL2_REFRESH_INTERVAL_BUSY 10
  53 #define SDL2_MAX_IDLE_COUNT (2 * GUI_REFRESH_INTERVAL_DEFAULT \
  54                              / SDL2_REFRESH_INTERVAL_BUSY + 1)
  55
  56 static void sdl_update_caption(struct sdl2_console *scon);
  57
  58 static struct sdl2_console *get_scon_from_window(uint32_t window_id)
  59 {
  60     int i;
  61     for (i = 0; i < sdl2_num_outputs; i++) {
  62         if (sdl2_console[i].real_window == SDL_GetWindowFromID(window_id)) {
  63             return &sdl2_console[i];
  64         }
  65     }
  66     return NULL;
  67 }
  68
  69 void sdl2_window_create(struct sdl2_console *scon)
  70 {
  71     int flags = 0;
  72
  73     if (!scon->surface) {
  74         return;
  75     }
  76     assert(!scon->real_window);
  77
  78     if (gui_fullscreen) {
  79         flags |= SDL_WINDOW_FULLSCREEN_DESKTOP;
  80     } else {
  81         flags |= SDL_WINDOW_RESIZABLE;
  82     }
  83     if (scon->hidden) {
  84         flags |= SDL_WINDOW_HIDDEN;
  85     }
  86
  87     scon->real_window = SDL_CreateWindow("", SDL_WINDOWPOS_UNDEFINED,
  88                                          SDL_WINDOWPOS_UNDEFINED,
  89                                          surface_width(scon->surface),
  90                                          surface_height(scon->surface),
  91                                          flags);
  92     scon->real_renderer = SDL_CreateRenderer(scon->real_window, -1, 0);
  93     if (scon->opengl) {
  94         scon->winctx = SDL_GL_GetCurrentContext();
  95     }
  96     sdl_update_caption(scon);
  97 }
  98
  99 void sdl2_window_destroy(struct sdl2_console *scon)
 100 {
 101     if (!scon->real_window) {
 102         return;
 103     }
 104
 105     SDL_DestroyRenderer(scon->real_renderer);
 106     scon->real_renderer = NULL;
 107     SDL_DestroyWindow(scon->real_window);
 108     scon->real_window = NULL;
 109 }
 110
 111 void sdl2_window_resize(struct sdl2_console *scon)
 112 {
 113     if (!scon->real_window) {
 114         return;
 115     }
 116
 117     SDL_SetWindowSize(scon->real_window,
 118                       surface_width(scon->surface),
 119                       surface_height(scon->surface));
 120 }
 121
 122 static void sdl2_redraw(struct sdl2_console *scon)
 123 {
 124     if (scon->opengl) {
 125 #ifdef CONFIG_OPENGL
 126         sdl2_gl_redraw(scon);
 127 #endif
 128     } else {
 129         sdl2_2d_redraw(scon);
 130     }
 131 }
 132
 133 static void sdl_update_caption(struct sdl2_console *scon)
 134 {
 135     char win_title[1024];
 136     char icon_title[1024];
 137     const char *status = "";
 138
 139     if (!runstate_is_running()) {
 140         status = " [Stopped]";
 141     } else if (gui_grab) {
 142         if (alt_grab) {
 143             status = " - Press Ctrl-Alt-Shift-G to exit grab";
 144         } else if (ctrl_grab) {
 145             status = " - Press Right-Ctrl-G to exit grab";
 146         } else {
 147             status = " - Press Ctrl-Alt-G to exit grab";
 148         }
 149     }
 150
 151     if (qemu_name) {
 152         snprintf(win_title, sizeof(win_title), "QEMU (%s-%d)%s", qemu_name,
 153                  scon->idx, status);
 154         snprintf(icon_title, sizeof(icon_title), "QEMU (%s)", qemu_name);
 155     } else {
 156         snprintf(win_title, sizeof(win_title), "QEMU%s", status);
 157         snprintf(icon_title, sizeof(icon_title), "QEMU");
 158     }
 159
 160     if (scon->real_window) {
 161         SDL_SetWindowTitle(scon->real_window, win_title);
 162     }
 163 }
 164
 165 static void sdl_hide_cursor(void)
 166 {
 167     if (!cursor_hide) {
 168         return;
 169     }
 170
 171     SDL_ShowCursor(SDL_DISABLE);
 172     SDL_SetCursor(sdl_cursor_hidden);
 173
 174     if (!qemu_input_is_absolute()) {
 175         SDL_SetRelativeMouseMode(SDL_TRUE);
 176     }
 177 }
 178
 179 static void sdl_show_cursor(void)
 180 {
 181     if (!cursor_hide) {
 182         return;
 183     }
 184
 185     if (!qemu_input_is_absolute()) {
 186         SDL_SetRelativeMouseMode(SDL_FALSE);
 187     }
 188
 189     if (guest_cursor &&
 190         (gui_grab || qemu_input_is_absolute() || absolute_enabled)) {
 191         SDL_SetCursor(guest_sprite);
 192     } else {
 193         SDL_SetCursor(sdl_cursor_normal);
 194     }
 195
 196     SDL_ShowCursor(SDL_ENABLE);
 197 }
 198
 199 static void sdl_grab_start(struct sdl2_console *scon)
 200 {
 201     QemuConsole *con = scon ? scon->dcl.con : NULL;
 202
 203     if (!con || !qemu_console_is_graphic(con)) {
 204         return;
 205     }
 206     /*
 207      * If the application is not active, do not try to enter grab state. This
 208      * prevents 'SDL_WM_GrabInput(SDL_GRAB_ON)' from blocking all the
 209      * application (SDL bug).
 210      */
 211     if (!(SDL_GetWindowFlags(scon->real_window) & SDL_WINDOW_INPUT_FOCUS)) {
 212         return;
 213     }
 214     if (guest_cursor) {
 215         SDL_SetCursor(guest_sprite);
 216         if (!qemu_input_is_absolute() && !absolute_enabled) {
 217             SDL_WarpMouseInWindow(scon->real_window, guest_x, guest_y);
 218         }
 219     } else {
 220         sdl_hide_cursor();
 221     }
 222     SDL_SetWindowGrab(scon->real_window, SDL_TRUE);
 223     gui_grab = 1;
 224     sdl_update_caption(scon);
 225 }
 226
 227 static void sdl_grab_end(struct sdl2_console *scon)
 228 {
 229     SDL_SetWindowGrab(scon->real_window, SDL_FALSE);
 230     gui_grab = 0;
 231     sdl_show_cursor();
 232     sdl_update_caption(scon);
 233 }
 234
 235 static void absolute_mouse_grab(struct sdl2_console *scon)
 236 {
 237     int mouse_x, mouse_y;
 238     int scr_w, scr_h;
 239     SDL_GetMouseState(&mouse_x, &mouse_y);
 240     SDL_GetWindowSize(scon->real_window, &scr_w, &scr_h);
 241     if (mouse_x > 0 && mouse_x < scr_w - 1 &&
 242         mouse_y > 0 && mouse_y < scr_h - 1) {
 243         sdl_grab_start(scon);
 244     }
 245 }
 246
 247 static void sdl_mouse_mode_change(Notifier *notify, void *data)
 248 {
 249     if (qemu_input_is_absolute()) {
 250         if (!absolute_enabled) {
 251             absolute_enabled = 1;
 252             SDL_SetRelativeMouseMode(SDL_FALSE);
 253             absolute_mouse_grab(&sdl2_console[0]);
 254         }
 255     } else if (absolute_enabled) {
 256         if (!gui_fullscreen) {
 257             sdl_grab_end(&sdl2_console[0]);
 258         }
 259         absolute_enabled = 0;
 260     }
 261 }
 262
 263 static void sdl_send_mouse_event(struct sdl2_console *scon, int dx, int dy,
 264                                  int x, int y, int state)
 265 {
 266     static uint32_t bmap[INPUT_BUTTON__MAX] = {
 267         [INPUT_BUTTON_LEFT]       = SDL_BUTTON(SDL_BUTTON_LEFT),
 268         [INPUT_BUTTON_MIDDLE]     = SDL_BUTTON(SDL_BUTTON_MIDDLE),
 269         [INPUT_BUTTON_RIGHT]      = SDL_BUTTON(SDL_BUTTON_RIGHT),
 270     };
 271     static uint32_t prev_state;
 272
 273     if (prev_state != state) {
 274         qemu_input_update_buttons(scon->dcl.con, bmap, prev_state, state);
 275         prev_state = state;
 276     }
 277
 278     if (qemu_input_is_absolute()) {
 279         qemu_input_queue_abs(scon->dcl.con, INPUT_AXIS_X,
 280                              x, 0, surface_width(scon->surface));
 281         qemu_input_queue_abs(scon->dcl.con, INPUT_AXIS_Y,
 282                              y, 0, surface_height(scon->surface));
 283     } else {
 284         if (guest_cursor) {
 285             x -= guest_x;
 286             y -= guest_y;
 287             guest_x += x;
 288             guest_y += y;
 289             dx = x;
 290             dy = y;
 291         }
 292         qemu_input_queue_rel(scon->dcl.con, INPUT_AXIS_X, dx);
 293         qemu_input_queue_rel(scon->dcl.con, INPUT_AXIS_Y, dy);
 294     }
 295     qemu_input_event_sync();
 296 }
 297
 298 static void toggle_full_screen(struct sdl2_console *scon)
 299 {
 300     gui_fullscreen = !gui_fullscreen;
 301     if (gui_fullscreen) {
 302         SDL_SetWindowFullscreen(scon->real_window,
 303                                 SDL_WINDOW_FULLSCREEN_DESKTOP);
 304         gui_saved_grab = gui_grab;
 305         sdl_grab_start(scon);
 306     } else {
 307         if (!gui_saved_grab) {
 308             sdl_grab_end(scon);
 309         }
 310         SDL_SetWindowFullscreen(scon->real_window, 0);
 311     }
 312     sdl2_redraw(scon);
 313 }
 314
 315 static int get_mod_state(void)
 316 {
 317     SDL_Keymod mod = SDL_GetModState();
 318
 319     if (alt_grab) {
 320         return (mod & (gui_grab_code | KMOD_LSHIFT)) ==
 321             (gui_grab_code | KMOD_LSHIFT);
 322     } else if (ctrl_grab) {
 323         return (mod & KMOD_RCTRL) == KMOD_RCTRL;
 324     } else {
 325         return (mod & gui_grab_code) == gui_grab_code;
 326     }
 327 }
 328
 329 static void handle_keydown(SDL_Event *ev)
 330 {
 331     int win;
 332     struct sdl2_console *scon = get_scon_from_window(ev->key.windowID);
 333     int gui_key_modifier_pressed = get_mod_state();
 334
 335     if (!scon->ignore_hotkeys && gui_key_modifier_pressed && !ev->key.repeat) {
 336         switch (ev->key.keysym.scancode) {
 337         case SDL_SCANCODE_2:
 338         case SDL_SCANCODE_3:
 339         case SDL_SCANCODE_4:
 340         case SDL_SCANCODE_5:
 341         case SDL_SCANCODE_6:
 342         case SDL_SCANCODE_7:
 343         case SDL_SCANCODE_8:
 344         case SDL_SCANCODE_9:
 345             if (gui_grab) {
 346                 sdl_grab_end(scon);
 347             }
 348
 349             win = ev->key.keysym.scancode - SDL_SCANCODE_1;
 350             if (win < sdl2_num_outputs) {
 351                 sdl2_console[win].hidden = !sdl2_console[win].hidden;
 352                 if (sdl2_console[win].real_window) {
 353                     if (sdl2_console[win].hidden) {
 354                         SDL_HideWindow(sdl2_console[win].real_window);
 355                     } else {
 356                         SDL_ShowWindow(sdl2_console[win].real_window);
 357                     }
 358                 }
 359                 gui_keysym = 1;
 360             }
 361             break;
 362         case SDL_SCANCODE_F:
 363             toggle_full_screen(scon);
 364             gui_keysym = 1;
 365             break;
 366         case SDL_SCANCODE_G:
 367             gui_keysym = 1;
 368             if (!gui_grab) {
 369                 sdl_grab_start(scon);
 370             } else if (!gui_fullscreen) {
 371                 sdl_grab_end(scon);
 372             }
 373             break;
 374         case SDL_SCANCODE_U:
 375             sdl2_window_destroy(scon);
 376             sdl2_window_create(scon);
 377             if (!scon->opengl) {
 378                 /* re-create scon->texture */
 379                 sdl2_2d_switch(&scon->dcl, scon->surface);
 380             }
 381             gui_keysym = 1;
 382             break;
 383 #if 0
 384         case SDL_SCANCODE_KP_PLUS:
 385         case SDL_SCANCODE_KP_MINUS:
 386             if (!gui_fullscreen) {
 387                 int scr_w, scr_h;
 388                 int width, height;
 389                 SDL_GetWindowSize(scon->real_window, &scr_w, &scr_h);
 390
 391                 width = MAX(scr_w + (ev->key.keysym.scancode ==
 392                                      SDL_SCANCODE_KP_PLUS ? 50 : -50),
 393                             160);
 394                 height = (surface_height(scon->surface) * width) /
 395                     surface_width(scon->surface);
 396                 fprintf(stderr, "%s: scale to %dx%d\n",
 397                         __func__, width, height);
 398                 sdl_scale(scon, width, height);
 399                 sdl2_redraw(scon);
 400                 gui_keysym = 1;
 401             }
 402 #endif
 403         default:
 404             break;
 405         }
 406     }
 407     if (!gui_keysym) {
 408         sdl2_process_key(scon, &ev->key);
 409     }
 410 }
 411
 412 static void handle_keyup(SDL_Event *ev)
 413 {
 414     struct sdl2_console *scon = get_scon_from_window(ev->key.windowID);
 415     int gui_key_modifier_pressed = get_mod_state();
 416
 417     scon->ignore_hotkeys = false;
 418
 419     if (!gui_key_modifier_pressed) {
 420         gui_keysym = 0;
 421     }
 422     if (!gui_keysym) {
 423         sdl2_process_key(scon, &ev->key);
 424     }
 425 }
 426
 427 static void handle_textinput(SDL_Event *ev)
 428 {
 429     struct sdl2_console *scon = get_scon_from_window(ev->key.windowID);
 430     QemuConsole *con = scon ? scon->dcl.con : NULL;
 431
 432     if (qemu_console_is_graphic(con)) {
 433         return;
 434     }
 435     kbd_put_string_console(con, ev->text.text, strlen(ev->text.text));
 436 }
 437
 438 static void handle_mousemotion(SDL_Event *ev)
 439 {
 440     int max_x, max_y;
 441     struct sdl2_console *scon = get_scon_from_window(ev->key.windowID);
 442
 443     if (!qemu_console_is_graphic(scon->dcl.con)) {
 444         return;
 445     }
 446
 447     if (qemu_input_is_absolute() || absolute_enabled) {
 448         int scr_w, scr_h;
 449         SDL_GetWindowSize(scon->real_window, &scr_w, &scr_h);
 450         max_x = scr_w - 1;
 451         max_y = scr_h - 1;
 452         if (gui_grab && !gui_fullscreen
 453             && (ev->motion.x == 0 || ev->motion.y == 0 ||
 454                 ev->motion.x == max_x || ev->motion.y == max_y)) {
 455             sdl_grab_end(scon);
 456         }
 457         if (!gui_grab &&
 458             (ev->motion.x > 0 && ev->motion.x < max_x &&
 459              ev->motion.y > 0 && ev->motion.y < max_y)) {
 460             sdl_grab_start(scon);
 461         }
 462     }
 463     if (gui_grab || qemu_input_is_absolute() || absolute_enabled) {
 464         sdl_send_mouse_event(scon, ev->motion.xrel, ev->motion.yrel,
 465                              ev->motion.x, ev->motion.y, ev->motion.state);
 466     }
 467 }
 468
 469 static void handle_mousebutton(SDL_Event *ev)
 470 {
 471     int buttonstate = SDL_GetMouseState(NULL, NULL);
 472     SDL_MouseButtonEvent *bev;
 473     struct sdl2_console *scon = get_scon_from_window(ev->key.windowID);
 474
 475     if (!qemu_console_is_graphic(scon->dcl.con)) {
 476         return;
 477     }
 478
 479     bev = &ev->button;
 480     if (!gui_grab && !qemu_input_is_absolute()) {
 481         if (ev->type == SDL_MOUSEBUTTONUP && bev->button == SDL_BUTTON_LEFT) {
 482             /* start grabbing all events */
 483             sdl_grab_start(scon);
 484         }
 485     } else {
 486         if (ev->type == SDL_MOUSEBUTTONDOWN) {
 487             buttonstate |= SDL_BUTTON(bev->button);
 488         } else {
 489             buttonstate &= ~SDL_BUTTON(bev->button);
 490         }
 491         sdl_send_mouse_event(scon, 0, 0, bev->x, bev->y, buttonstate);
 492     }
 493 }
 494
 495 static void handle_mousewheel(SDL_Event *ev)
 496 {
 497     struct sdl2_console *scon = get_scon_from_window(ev->key.windowID);
 498     SDL_MouseWheelEvent *wev = &ev->wheel;
 499     InputButton btn;
 500
 501     if (!qemu_console_is_graphic(scon->dcl.con)) {
 502         return;
 503     }
 504
 505     if (wev->y > 0) {
 506         btn = INPUT_BUTTON_WHEEL_UP;
 507     } else if (wev->y < 0) {
 508         btn = INPUT_BUTTON_WHEEL_DOWN;
 509     } else {
 510         return;
 511     }
 512
 513     qemu_input_queue_btn(scon->dcl.con, btn, true);
 514     qemu_input_event_sync();
 515     qemu_input_queue_btn(scon->dcl.con, btn, false);
 516     qemu_input_event_sync();
 517 }
 518
 519 static void handle_windowevent(SDL_Event *ev)
 520 {
 521     struct sdl2_console *scon = get_scon_from_window(ev->window.windowID);
 522     bool allow_close = true;
 523
 524     if (!scon) {
 525         return;
 526     }
 527
 528     switch (ev->window.event) {
 529     case SDL_WINDOWEVENT_RESIZED:
 530         {
 531             QemuUIInfo info;
 532             memset(&info, 0, sizeof(info));
 533             info.width = ev->window.data1;
 534             info.height = ev->window.data2;
 535             dpy_set_ui_info(scon->dcl.con, &info);
 536         }
 537         sdl2_redraw(scon);
 538         break;
 539     case SDL_WINDOWEVENT_EXPOSED:
 540         sdl2_redraw(scon);
 541         break;
 542     case SDL_WINDOWEVENT_FOCUS_GAINED:
 543     case SDL_WINDOWEVENT_ENTER:
 544         if (!gui_grab && (qemu_input_is_absolute() || absolute_enabled)) {
 545             absolute_mouse_grab(scon);
 546         }
 547         /* If a new console window opened using a hotkey receives the
 548          * focus, SDL sends another KEYDOWN event to the new window,
 549          * closing the console window immediately after.
 550          *
 551          * Work around this by ignoring further hotkey events until a
 552          * key is released.
 553          */
 554         scon->ignore_hotkeys = get_mod_state();
 555         break;
 556     case SDL_WINDOWEVENT_FOCUS_LOST:
 557         if (gui_grab && !gui_fullscreen) {
 558             sdl_grab_end(scon);
 559         }
 560         break;
 561     case SDL_WINDOWEVENT_RESTORED:
 562         update_displaychangelistener(&scon->dcl, GUI_REFRESH_INTERVAL_DEFAULT);
 563         break;
 564     case SDL_WINDOWEVENT_MINIMIZED:
 565         update_displaychangelistener(&scon->dcl, 500);
 566         break;
 567     case SDL_WINDOWEVENT_CLOSE:
 568         if (qemu_console_is_graphic(scon->dcl.con)) {
 569             if (opts->has_window_close && !opts->window_close) {
 570                 allow_close = false;
 571             }
 572             if (allow_close) {
 573                 no_shutdown = 0;
 574                 qemu_system_shutdown_request(SHUTDOWN_CAUSE_HOST_UI);
 575             }
 576         } else {
 577             SDL_HideWindow(scon->real_window);
 578             scon->hidden = true;
 579         }
 580         break;
 581     case SDL_WINDOWEVENT_SHOWN:
 582         scon->hidden = false;
 583         break;
 584     case SDL_WINDOWEVENT_HIDDEN:
 585         scon->hidden = true;
 586         break;
 587     }
 588 }
 589
 590 void sdl2_poll_events(struct sdl2_console *scon)
 591 {
 592     SDL_Event ev1, *ev = &ev1;
 593     bool allow_close = true;
 594     int idle = 1;
 595
 596     if (scon->last_vm_running != runstate_is_running()) {
 597         scon->last_vm_running = runstate_is_running();
 598         sdl_update_caption(scon);
 599     }
 600
 601     while (SDL_PollEvent(ev)) {
 602         switch (ev->type) {
 603         case SDL_KEYDOWN:
 604             idle = 0;
 605             handle_keydown(ev);
 606             break;
 607         case SDL_KEYUP:
 608             idle = 0;
 609             handle_keyup(ev);
 610             break;
 611         case SDL_TEXTINPUT:
 612             idle = 0;
 613             handle_textinput(ev);
 614             break;
 615         case SDL_QUIT:
 616             if (opts->has_window_close && !opts->window_close) {
 617                 allow_close = false;
 618             }
 619             if (allow_close) {
 620                 no_shutdown = 0;
 621                 qemu_system_shutdown_request(SHUTDOWN_CAUSE_HOST_UI);
 622             }
 623             break;
 624         case SDL_MOUSEMOTION:
 625             idle = 0;
 626             handle_mousemotion(ev);
 627             break;
 628         case SDL_MOUSEBUTTONDOWN:
 629         case SDL_MOUSEBUTTONUP:
 630             idle = 0;
 631             handle_mousebutton(ev);
 632             break;
 633         case SDL_MOUSEWHEEL:
 634             idle = 0;
 635             handle_mousewheel(ev);
 636             break;
 637         case SDL_WINDOWEVENT:
 638             handle_windowevent(ev);
 639             break;
 640         default:
 641             break;
 642         }
 643     }
 644
 645     if (idle) {
 646         if (scon->idle_counter < SDL2_MAX_IDLE_COUNT) {
 647             scon->idle_counter++;
 648             if (scon->idle_counter >= SDL2_MAX_IDLE_COUNT) {
 649                 scon->dcl.update_interval = GUI_REFRESH_INTERVAL_DEFAULT;
 650             }
 651         }
 652     } else {
 653         scon->idle_counter = 0;
 654         scon->dcl.update_interval = SDL2_REFRESH_INTERVAL_BUSY;
 655     }
 656 }
 657
 658 static void sdl_mouse_warp(DisplayChangeListener *dcl,
 659                            int x, int y, int on)
 660 {
 661     struct sdl2_console *scon = container_of(dcl, struct sdl2_console, dcl);
 662
 663     if (!qemu_console_is_graphic(scon->dcl.con)) {
 664         return;
 665     }
 666
 667     if (on) {
 668         if (!guest_cursor) {
 669             sdl_show_cursor();
 670         }
 671         if (gui_grab || qemu_input_is_absolute() || absolute_enabled) {
 672             SDL_SetCursor(guest_sprite);
 673             if (!qemu_input_is_absolute() && !absolute_enabled) {
 674                 SDL_WarpMouseInWindow(scon->real_window, x, y);
 675             }
 676         }
 677     } else if (gui_grab) {
 678         sdl_hide_cursor();
 679     }
 680     guest_cursor = on;
 681     guest_x = x, guest_y = y;
 682 }
 683
 684 static void sdl_mouse_define(DisplayChangeListener *dcl,
 685                              QEMUCursor *c)
 686 {
 687
 688     if (guest_sprite) {
 689         SDL_FreeCursor(guest_sprite);
 690     }
 691
 692     if (guest_sprite_surface) {
 693         SDL_FreeSurface(guest_sprite_surface);
 694     }
 695
 696     guest_sprite_surface =
 697         SDL_CreateRGBSurfaceFrom(c->data, c->width, c->height, 32, c->width * 4,
 698                                  0xff0000, 0x00ff00, 0xff, 0xff000000);
 699
 700     if (!guest_sprite_surface) {
 701         fprintf(stderr, "Failed to make rgb surface from %p\n", c);
 702         return;
 703     }
 704     guest_sprite = SDL_CreateColorCursor(guest_sprite_surface,
 705                                          c->hot_x, c->hot_y);
 706     if (!guest_sprite) {
 707         fprintf(stderr, "Failed to make color cursor from %p\n", c);
 708         return;
 709     }
 710     if (guest_cursor &&
 711         (gui_grab || qemu_input_is_absolute() || absolute_enabled)) {
 712         SDL_SetCursor(guest_sprite);
 713     }
 714 }
 715
 716 static void sdl_cleanup(void)
 717 {
 718     if (guest_sprite) {
 719         SDL_FreeCursor(guest_sprite);
 720     }
 721     SDL_QuitSubSystem(SDL_INIT_VIDEO);
 722 }
 723
 724 static const DisplayChangeListenerOps dcl_2d_ops = {
 725     .dpy_name             = "sdl2-2d",
 726     .dpy_gfx_update       = sdl2_2d_update,
 727     .dpy_gfx_switch       = sdl2_2d_switch,
 728     .dpy_gfx_check_format = sdl2_2d_check_format,
 729     .dpy_refresh          = sdl2_2d_refresh,
 730     .dpy_mouse_set        = sdl_mouse_warp,
 731     .dpy_cursor_define    = sdl_mouse_define,
 732 };
 733
 734 #ifdef CONFIG_OPENGL
 735 static const DisplayChangeListenerOps dcl_gl_ops = {
 736     .dpy_name                = "sdl2-gl",
 737     .dpy_gfx_update          = sdl2_gl_update,
 738     .dpy_gfx_switch          = sdl2_gl_switch,
 739     .dpy_gfx_check_format    = console_gl_check_format,
 740     .dpy_refresh             = sdl2_gl_refresh,
 741     .dpy_mouse_set           = sdl_mouse_warp,
 742     .dpy_cursor_define       = sdl_mouse_define,
 743
 744     .dpy_gl_ctx_create       = sdl2_gl_create_context,
 745     .dpy_gl_ctx_destroy      = sdl2_gl_destroy_context,
 746     .dpy_gl_ctx_make_current = sdl2_gl_make_context_current,
 747     .dpy_gl_ctx_get_current  = sdl2_gl_get_current_context,
 748     .dpy_gl_scanout_disable  = sdl2_gl_scanout_disable,
 749     .dpy_gl_scanout_texture  = sdl2_gl_scanout_texture,
 750     .dpy_gl_update           = sdl2_gl_scanout_flush,
 751 };
 752 #endif
 753
 754 static void sdl2_display_early_init(DisplayOptions *o)
 755 {
 756     assert(o->type == DISPLAY_TYPE_SDL);
 757     if (o->has_gl && o->gl) {
 758 #ifdef CONFIG_OPENGL
 759         display_opengl = 1;
 760 #endif
 761     }
 762 }
 763
 764 static void sdl2_display_init(DisplayState *ds, DisplayOptions *o)
 765 {
 766     int flags;
 767     uint8_t data = 0;
 768     char *filename;
 769     int i;
 770     SDL_SysWMinfo info;
 771
 772     assert(o->type == DISPLAY_TYPE_SDL);
 773     opts = o;
 774
 775 #ifdef __linux__
 776     /* on Linux, SDL may use fbcon|directfb|svgalib when run without
 777      * accessible $DISPLAY to open X11 window.  This is often the case
 778      * when qemu is run using sudo.  But in this case, and when actually
 779      * run in X11 environment, SDL fights with X11 for the video card,
 780      * making current display unavailable, often until reboot.
 781      * So make x11 the default SDL video driver if this variable is unset.
 782      * This is a bit hackish but saves us from bigger problem.
 783      * Maybe it's a good idea to fix this in SDL instead.
 784      */
 785     setenv("SDL_VIDEODRIVER", "x11", 0);
 786 #endif
 787
 788     flags = SDL_INIT_VIDEO | SDL_INIT_NOPARACHUTE;
 789     if (SDL_Init(flags)) {
 790         fprintf(stderr, "Could not initialize SDL(%s) - exiting\n",
 791                 SDL_GetError());
 792         exit(1);
 793     }
 794     SDL_SetHint(SDL_HINT_GRAB_KEYBOARD, "1");
 795     memset(&info, 0, sizeof(info));
 796     SDL_VERSION(&info.version);
 797
 798     for (i = 0;; i++) {
 799         QemuConsole *con = qemu_console_lookup_by_index(i);
 800         if (!con) {
 801             break;
 802         }
 803     }
 804     sdl2_num_outputs = i;
 805     if (sdl2_num_outputs == 0) {
 806         return;
 807     }
 808     sdl2_console = g_new0(struct sdl2_console, sdl2_num_outputs);
 809     for (i = 0; i < sdl2_num_outputs; i++) {
 810         QemuConsole *con = qemu_console_lookup_by_index(i);
 811         assert(con != NULL);
 812         if (!qemu_console_is_graphic(con)) {
 813             sdl2_console[i].hidden = true;
 814         }
 815         sdl2_console[i].idx = i;
 816 #ifdef CONFIG_OPENGL
 817         sdl2_console[i].opengl = display_opengl;
 818         sdl2_console[i].dcl.ops = display_opengl ? &dcl_gl_ops : &dcl_2d_ops;
 819 #else
 820         sdl2_console[i].opengl = 0;
 821         sdl2_console[i].dcl.ops = &dcl_2d_ops;
 822 #endif
 823         sdl2_console[i].dcl.con = con;
 824         register_displaychangelistener(&sdl2_console[i].dcl);
 825
 826 #if defined(SDL_VIDEO_DRIVER_WINDOWS) || defined(SDL_VIDEO_DRIVER_X11)
 827         if (SDL_GetWindowWMInfo(sdl2_console[i].real_window, &info)) {
 828 #if defined(SDL_VIDEO_DRIVER_WINDOWS)
 829             qemu_console_set_window_id(con, (uintptr_t)info.info.win.window);
 830 #elif defined(SDL_VIDEO_DRIVER_X11)
 831             qemu_console_set_window_id(con, info.info.x11.window);
 832 #endif
 833         }
 834 #endif
 835     }
 836
 837     /* Load a 32x32x4 image. White pixels are transparent. */
 838     filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, "qemu-icon.bmp");
 839     if (filename) {
 840         SDL_Surface *image = SDL_LoadBMP(filename);
 841         if (image) {
 842             uint32_t colorkey = SDL_MapRGB(image->format, 255, 255, 255);
 843             SDL_SetColorKey(image, SDL_TRUE, colorkey);
 844             SDL_SetWindowIcon(sdl2_console[0].real_window, image);
 845         }
 846         g_free(filename);
 847     }
 848
 849     if (opts->has_full_screen && opts->full_screen) {
 850         gui_fullscreen = 1;
 851         sdl_grab_start(0);
 852     }
 853
 854     mouse_mode_notifier.notify = sdl_mouse_mode_change;
 855     qemu_add_mouse_mode_change_notifier(&mouse_mode_notifier);
 856
 857     gui_grab = 0;
 858
 859     sdl_cursor_hidden = SDL_CreateCursor(&data, &data, 8, 1, 0, 0);
 860     sdl_cursor_normal = SDL_GetCursor();
 861
 862     atexit(sdl_cleanup);
 863 }
 864
 865 static QemuDisplay qemu_display_sdl2 = {
 866     .type       = DISPLAY_TYPE_SDL,
 867     .early_init = sdl2_display_early_init,
 868     .init       = sdl2_display_init,
 869 };
 870
 871 static void register_sdl1(void)
 872 {
 873     qemu_display_register(&qemu_display_sdl2);
 874 }
 875
 876 type_init(register_sdl1);