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
  36 static SDL_Surface *guest_sprite_surface;
  37 static int gui_grab; /* if true, all keyboard/mouse events are grabbed */
  38
  39 static int gui_saved_grab;
  40 static int gui_fullscreen;
  41 static int gui_key_modifier_pressed;
  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
 334     gui_key_modifier_pressed = get_mod_state();
 335
 336     if (!scon->ignore_hotkeys && gui_key_modifier_pressed && !ev->key.repeat) {
 337         switch (ev->key.keysym.scancode) {
 338         case SDL_SCANCODE_2:
 339         case SDL_SCANCODE_3:
 340         case SDL_SCANCODE_4:
 341         case SDL_SCANCODE_5:
 342         case SDL_SCANCODE_6:
 343         case SDL_SCANCODE_7:
 344         case SDL_SCANCODE_8:
 345         case SDL_SCANCODE_9:
 346             if (gui_grab) {
 347                 sdl_grab_end(scon);
 348             }
 349
 350             win = ev->key.keysym.scancode - SDL_SCANCODE_1;
 351             if (win < sdl2_num_outputs) {
 352                 sdl2_console[win].hidden = !sdl2_console[win].hidden;
 353                 if (sdl2_console[win].real_window) {
 354                     if (sdl2_console[win].hidden) {
 355                         SDL_HideWindow(sdl2_console[win].real_window);
 356                     } else {
 357                         SDL_ShowWindow(sdl2_console[win].real_window);
 358                     }
 359                 }
 360                 gui_keysym = 1;
 361             }
 362             break;
 363         case SDL_SCANCODE_F:
 364             toggle_full_screen(scon);
 365             gui_keysym = 1;
 366             break;
 367         case SDL_SCANCODE_G:
 368             gui_keysym = 1;
 369             if (!gui_grab) {
 370                 sdl_grab_start(scon);
 371             } else if (!gui_fullscreen) {
 372                 sdl_grab_end(scon);
 373             }
 374             break;
 375         case SDL_SCANCODE_U:
 376             sdl2_window_destroy(scon);
 377             sdl2_window_create(scon);
 378             if (!scon->opengl) {
 379                 /* re-create scon->texture */
 380                 sdl2_2d_switch(&scon->dcl, scon->surface);
 381             }
 382             gui_keysym = 1;
 383             break;
 384 #if 0
 385         case SDL_SCANCODE_KP_PLUS:
 386         case SDL_SCANCODE_KP_MINUS:
 387             if (!gui_fullscreen) {
 388                 int scr_w, scr_h;
 389                 int width, height;
 390                 SDL_GetWindowSize(scon->real_window, &scr_w, &scr_h);
 391
 392                 width = MAX(scr_w + (ev->key.keysym.scancode ==
 393                                      SDL_SCANCODE_KP_PLUS ? 50 : -50),
 394                             160);
 395                 height = (surface_height(scon->surface) * width) /
 396                     surface_width(scon->surface);
 397                 fprintf(stderr, "%s: scale to %dx%d\n",
 398                         __func__, width, height);
 399                 sdl_scale(scon, width, height);
 400                 sdl2_redraw(scon);
 401                 gui_keysym = 1;
 402             }
 403 #endif
 404         default:
 405             break;
 406         }
 407     }
 408     if (!gui_keysym) {
 409         sdl2_process_key(scon, &ev->key);
 410     }
 411 }
 412
 413 static void handle_keyup(SDL_Event *ev)
 414 {
 415     int mod_state;
 416     struct sdl2_console *scon = get_scon_from_window(ev->key.windowID);
 417
 418     scon->ignore_hotkeys = false;
 419
 420     if (!alt_grab) {
 421         mod_state = (ev->key.keysym.mod & gui_grab_code);
 422     } else {
 423         mod_state = (ev->key.keysym.mod & (gui_grab_code | KMOD_LSHIFT));
 424     }
 425     if (!mod_state && gui_key_modifier_pressed) {
 426         gui_key_modifier_pressed = 0;
 427         gui_keysym = 0;
 428     }
 429     if (!gui_keysym) {
 430         sdl2_process_key(scon, &ev->key);
 431     }
 432 }
 433
 434 static void handle_textinput(SDL_Event *ev)
 435 {
 436     struct sdl2_console *scon = get_scon_from_window(ev->key.windowID);
 437     QemuConsole *con = scon ? scon->dcl.con : NULL;
 438
 439     if (qemu_console_is_graphic(con)) {
 440         return;
 441     }
 442     kbd_put_string_console(con, ev->text.text, strlen(ev->text.text));
 443 }
 444
 445 static void handle_mousemotion(SDL_Event *ev)
 446 {
 447     int max_x, max_y;
 448     struct sdl2_console *scon = get_scon_from_window(ev->key.windowID);
 449
 450     if (!qemu_console_is_graphic(scon->dcl.con)) {
 451         return;
 452     }
 453
 454     if (qemu_input_is_absolute() || absolute_enabled) {
 455         int scr_w, scr_h;
 456         SDL_GetWindowSize(scon->real_window, &scr_w, &scr_h);
 457         max_x = scr_w - 1;
 458         max_y = scr_h - 1;
 459         if (gui_grab && !gui_fullscreen
 460             && (ev->motion.x == 0 || ev->motion.y == 0 ||
 461                 ev->motion.x == max_x || ev->motion.y == max_y)) {
 462             sdl_grab_end(scon);
 463         }
 464         if (!gui_grab &&
 465             (ev->motion.x > 0 && ev->motion.x < max_x &&
 466              ev->motion.y > 0 && ev->motion.y < max_y)) {
 467             sdl_grab_start(scon);
 468         }
 469     }
 470     if (gui_grab || qemu_input_is_absolute() || absolute_enabled) {
 471         sdl_send_mouse_event(scon, ev->motion.xrel, ev->motion.yrel,
 472                              ev->motion.x, ev->motion.y, ev->motion.state);
 473     }
 474 }
 475
 476 static void handle_mousebutton(SDL_Event *ev)
 477 {
 478     int buttonstate = SDL_GetMouseState(NULL, NULL);
 479     SDL_MouseButtonEvent *bev;
 480     struct sdl2_console *scon = get_scon_from_window(ev->key.windowID);
 481
 482     if (!qemu_console_is_graphic(scon->dcl.con)) {
 483         return;
 484     }
 485
 486     bev = &ev->button;
 487     if (!gui_grab && !qemu_input_is_absolute()) {
 488         if (ev->type == SDL_MOUSEBUTTONUP && bev->button == SDL_BUTTON_LEFT) {
 489             /* start grabbing all events */
 490             sdl_grab_start(scon);
 491         }
 492     } else {
 493         if (ev->type == SDL_MOUSEBUTTONDOWN) {
 494             buttonstate |= SDL_BUTTON(bev->button);
 495         } else {
 496             buttonstate &= ~SDL_BUTTON(bev->button);
 497         }
 498         sdl_send_mouse_event(scon, 0, 0, bev->x, bev->y, buttonstate);
 499     }
 500 }
 501
 502 static void handle_mousewheel(SDL_Event *ev)
 503 {
 504     struct sdl2_console *scon = get_scon_from_window(ev->key.windowID);
 505     SDL_MouseWheelEvent *wev = &ev->wheel;
 506     InputButton btn;
 507
 508     if (!qemu_console_is_graphic(scon->dcl.con)) {
 509         return;
 510     }
 511
 512     if (wev->y > 0) {
 513         btn = INPUT_BUTTON_WHEEL_UP;
 514     } else if (wev->y < 0) {
 515         btn = INPUT_BUTTON_WHEEL_DOWN;
 516     } else {
 517         return;
 518     }
 519
 520     qemu_input_queue_btn(scon->dcl.con, btn, true);
 521     qemu_input_event_sync();
 522     qemu_input_queue_btn(scon->dcl.con, btn, false);
 523     qemu_input_event_sync();
 524 }
 525
 526 static void handle_windowevent(SDL_Event *ev)
 527 {
 528     struct sdl2_console *scon = get_scon_from_window(ev->window.windowID);
 529
 530     if (!scon) {
 531         return;
 532     }
 533
 534     switch (ev->window.event) {
 535     case SDL_WINDOWEVENT_RESIZED:
 536         {
 537             QemuUIInfo info;
 538             memset(&info, 0, sizeof(info));
 539             info.width = ev->window.data1;
 540             info.height = ev->window.data2;
 541             dpy_set_ui_info(scon->dcl.con, &info);
 542         }
 543         sdl2_redraw(scon);
 544         break;
 545     case SDL_WINDOWEVENT_EXPOSED:
 546         sdl2_redraw(scon);
 547         break;
 548     case SDL_WINDOWEVENT_FOCUS_GAINED:
 549     case SDL_WINDOWEVENT_ENTER:
 550         if (!gui_grab && (qemu_input_is_absolute() || absolute_enabled)) {
 551             absolute_mouse_grab(scon);
 552         }
 553         /* If a new console window opened using a hotkey receives the
 554          * focus, SDL sends another KEYDOWN event to the new window,
 555          * closing the console window immediately after.
 556          *
 557          * Work around this by ignoring further hotkey events until a
 558          * key is released.
 559          */
 560         scon->ignore_hotkeys = get_mod_state();
 561         break;
 562     case SDL_WINDOWEVENT_FOCUS_LOST:
 563         if (gui_grab && !gui_fullscreen) {
 564             sdl_grab_end(scon);
 565         }
 566         break;
 567     case SDL_WINDOWEVENT_RESTORED:
 568         update_displaychangelistener(&scon->dcl, GUI_REFRESH_INTERVAL_DEFAULT);
 569         break;
 570     case SDL_WINDOWEVENT_MINIMIZED:
 571         update_displaychangelistener(&scon->dcl, 500);
 572         break;
 573     case SDL_WINDOWEVENT_CLOSE:
 574         if (qemu_console_is_graphic(scon->dcl.con)) {
 575             if (!no_quit) {
 576                 no_shutdown = 0;
 577                 qemu_system_shutdown_request(SHUTDOWN_CAUSE_HOST_UI);
 578             }
 579         } else {
 580             SDL_HideWindow(scon->real_window);
 581             scon->hidden = true;
 582         }
 583         break;
 584     case SDL_WINDOWEVENT_SHOWN:
 585         scon->hidden = false;
 586         break;
 587     case SDL_WINDOWEVENT_HIDDEN:
 588         scon->hidden = true;
 589         break;
 590     }
 591 }
 592
 593 void sdl2_poll_events(struct sdl2_console *scon)
 594 {
 595     SDL_Event ev1, *ev = &ev1;
 596     int idle = 1;
 597
 598     if (scon->last_vm_running != runstate_is_running()) {
 599         scon->last_vm_running = runstate_is_running();
 600         sdl_update_caption(scon);
 601     }
 602
 603     while (SDL_PollEvent(ev)) {
 604         switch (ev->type) {
 605         case SDL_KEYDOWN:
 606             idle = 0;
 607             handle_keydown(ev);
 608             break;
 609         case SDL_KEYUP:
 610             idle = 0;
 611             handle_keyup(ev);
 612             break;
 613         case SDL_TEXTINPUT:
 614             idle = 0;
 615             handle_textinput(ev);
 616             break;
 617         case SDL_QUIT:
 618             if (!no_quit) {
 619                 no_shutdown = 0;
 620                 qemu_system_shutdown_request(SHUTDOWN_CAUSE_HOST_UI);
 621             }
 622             break;
 623         case SDL_MOUSEMOTION:
 624             idle = 0;
 625             handle_mousemotion(ev);
 626             break;
 627         case SDL_MOUSEBUTTONDOWN:
 628         case SDL_MOUSEBUTTONUP:
 629             idle = 0;
 630             handle_mousebutton(ev);
 631             break;
 632         case SDL_MOUSEWHEEL:
 633             idle = 0;
 634             handle_mousewheel(ev);
 635             break;
 636         case SDL_WINDOWEVENT:
 637             handle_windowevent(ev);
 638             break;
 639         default:
 640             break;
 641         }
 642     }
 643
 644     if (idle) {
 645         if (scon->idle_counter < SDL2_MAX_IDLE_COUNT) {
 646             scon->idle_counter++;
 647             if (scon->idle_counter >= SDL2_MAX_IDLE_COUNT) {
 648                 scon->dcl.update_interval = GUI_REFRESH_INTERVAL_DEFAULT;
 649             }
 650         }
 651     } else {
 652         scon->idle_counter = 0;
 653         scon->dcl.update_interval = SDL2_REFRESH_INTERVAL_BUSY;
 654     }
 655 }
 656
 657 static void sdl_mouse_warp(DisplayChangeListener *dcl,
 658                            int x, int y, int on)
 659 {
 660     struct sdl2_console *scon = container_of(dcl, struct sdl2_console, dcl);
 661
 662     if (!qemu_console_is_graphic(scon->dcl.con)) {
 663         return;
 664     }
 665
 666     if (on) {
 667         if (!guest_cursor) {
 668             sdl_show_cursor();
 669         }
 670         if (gui_grab || qemu_input_is_absolute() || absolute_enabled) {
 671             SDL_SetCursor(guest_sprite);
 672             if (!qemu_input_is_absolute() && !absolute_enabled) {
 673                 SDL_WarpMouseInWindow(scon->real_window, x, y);
 674             }
 675         }
 676     } else if (gui_grab) {
 677         sdl_hide_cursor();
 678     }
 679     guest_cursor = on;
 680     guest_x = x, guest_y = y;
 681 }
 682
 683 static void sdl_mouse_define(DisplayChangeListener *dcl,
 684                              QEMUCursor *c)
 685 {
 686
 687     if (guest_sprite) {
 688         SDL_FreeCursor(guest_sprite);
 689     }
 690
 691     if (guest_sprite_surface) {
 692         SDL_FreeSurface(guest_sprite_surface);
 693     }
 694
 695     guest_sprite_surface =
 696         SDL_CreateRGBSurfaceFrom(c->data, c->width, c->height, 32, c->width * 4,
 697                                  0xff0000, 0x00ff00, 0xff, 0xff000000);
 698
 699     if (!guest_sprite_surface) {
 700         fprintf(stderr, "Failed to make rgb surface from %p\n", c);
 701         return;
 702     }
 703     guest_sprite = SDL_CreateColorCursor(guest_sprite_surface,
 704                                          c->hot_x, c->hot_y);
 705     if (!guest_sprite) {
 706         fprintf(stderr, "Failed to make color cursor from %p\n", c);
 707         return;
 708     }
 709     if (guest_cursor &&
 710         (gui_grab || qemu_input_is_absolute() || absolute_enabled)) {
 711         SDL_SetCursor(guest_sprite);
 712     }
 713 }
 714
 715 static void sdl_cleanup(void)
 716 {
 717     if (guest_sprite) {
 718         SDL_FreeCursor(guest_sprite);
 719     }
 720     SDL_QuitSubSystem(SDL_INIT_VIDEO);
 721 }
 722
 723 static const DisplayChangeListenerOps dcl_2d_ops = {
 724     .dpy_name             = "sdl2-2d",
 725     .dpy_gfx_update       = sdl2_2d_update,
 726     .dpy_gfx_switch       = sdl2_2d_switch,
 727     .dpy_gfx_check_format = sdl2_2d_check_format,
 728     .dpy_refresh          = sdl2_2d_refresh,
 729     .dpy_mouse_set        = sdl_mouse_warp,
 730     .dpy_cursor_define    = sdl_mouse_define,
 731 };
 732
 733 #ifdef CONFIG_OPENGL
 734 static const DisplayChangeListenerOps dcl_gl_ops = {
 735     .dpy_name                = "sdl2-gl",
 736     .dpy_gfx_update          = sdl2_gl_update,
 737     .dpy_gfx_switch          = sdl2_gl_switch,
 738     .dpy_gfx_check_format    = console_gl_check_format,
 739     .dpy_refresh             = sdl2_gl_refresh,
 740     .dpy_mouse_set           = sdl_mouse_warp,
 741     .dpy_cursor_define       = sdl_mouse_define,
 742
 743     .dpy_gl_ctx_create       = sdl2_gl_create_context,
 744     .dpy_gl_ctx_destroy      = sdl2_gl_destroy_context,
 745     .dpy_gl_ctx_make_current = sdl2_gl_make_context_current,
 746     .dpy_gl_ctx_get_current  = sdl2_gl_get_current_context,
 747     .dpy_gl_scanout_disable  = sdl2_gl_scanout_disable,
 748     .dpy_gl_scanout_texture  = sdl2_gl_scanout_texture,
 749     .dpy_gl_update           = sdl2_gl_scanout_flush,
 750 };
 751 #endif
 752
 753 void sdl_display_early_init(int opengl)
 754 {
 755     switch (opengl) {
 756     case -1: /* default */
 757     case 0:  /* off */
 758         break;
 759     case 1: /* on */
 760 #ifdef CONFIG_OPENGL
 761         display_opengl = 1;
 762 #endif
 763         break;
 764     default:
 765         g_assert_not_reached();
 766         break;
 767     }
 768 }
 769
 770 void sdl_display_init(DisplayState *ds, int full_screen)
 771 {
 772     int flags;
 773     uint8_t data = 0;
 774     char *filename;
 775     int i;
 776     SDL_SysWMinfo info;
 777
 778 #ifdef __linux__
 779     /* on Linux, SDL may use fbcon|directfb|svgalib when run without
 780      * accessible $DISPLAY to open X11 window.  This is often the case
 781      * when qemu is run using sudo.  But in this case, and when actually
 782      * run in X11 environment, SDL fights with X11 for the video card,
 783      * making current display unavailable, often until reboot.
 784      * So make x11 the default SDL video driver if this variable is unset.
 785      * This is a bit hackish but saves us from bigger problem.
 786      * Maybe it's a good idea to fix this in SDL instead.
 787      */
 788     setenv("SDL_VIDEODRIVER", "x11", 0);
 789 #endif
 790
 791     flags = SDL_INIT_VIDEO | SDL_INIT_NOPARACHUTE;
 792     if (SDL_Init(flags)) {
 793         fprintf(stderr, "Could not initialize SDL(%s) - exiting\n",
 794                 SDL_GetError());
 795         exit(1);
 796     }
 797     SDL_SetHint(SDL_HINT_GRAB_KEYBOARD, "1");
 798     memset(&info, 0, sizeof(info));
 799     SDL_VERSION(&info.version);
 800
 801     for (i = 0;; i++) {
 802         QemuConsole *con = qemu_console_lookup_by_index(i);
 803         if (!con) {
 804             break;
 805         }
 806     }
 807     sdl2_num_outputs = i;
 808     if (sdl2_num_outputs == 0) {
 809         return;
 810     }
 811     sdl2_console = g_new0(struct sdl2_console, sdl2_num_outputs);
 812     for (i = 0; i < sdl2_num_outputs; i++) {
 813         QemuConsole *con = qemu_console_lookup_by_index(i);
 814         assert(con != NULL);
 815         if (!qemu_console_is_graphic(con)) {
 816             sdl2_console[i].hidden = true;
 817         }
 818         sdl2_console[i].idx = i;
 819 #ifdef CONFIG_OPENGL
 820         sdl2_console[i].opengl = display_opengl;
 821         sdl2_console[i].dcl.ops = display_opengl ? &dcl_gl_ops : &dcl_2d_ops;
 822 #else
 823         sdl2_console[i].opengl = 0;
 824         sdl2_console[i].dcl.ops = &dcl_2d_ops;
 825 #endif
 826         sdl2_console[i].dcl.con = con;
 827         register_displaychangelistener(&sdl2_console[i].dcl);
 828
 829 #if defined(SDL_VIDEO_DRIVER_WINDOWS) || defined(SDL_VIDEO_DRIVER_X11)
 830         if (SDL_GetWindowWMInfo(sdl2_console[i].real_window, &info)) {
 831 #if defined(SDL_VIDEO_DRIVER_WINDOWS)
 832             qemu_console_set_window_id(con, (uintptr_t)info.info.win.window);
 833 #elif defined(SDL_VIDEO_DRIVER_X11)
 834             qemu_console_set_window_id(con, info.info.x11.window);
 835 #endif
 836         }
 837 #endif
 838     }
 839
 840     /* Load a 32x32x4 image. White pixels are transparent. */
 841     filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, "qemu-icon.bmp");
 842     if (filename) {
 843         SDL_Surface *image = SDL_LoadBMP(filename);
 844         if (image) {
 845             uint32_t colorkey = SDL_MapRGB(image->format, 255, 255, 255);
 846             SDL_SetColorKey(image, SDL_TRUE, colorkey);
 847             SDL_SetWindowIcon(sdl2_console[0].real_window, image);
 848         }
 849         g_free(filename);
 850     }
 851
 852     if (full_screen) {
 853         gui_fullscreen = 1;
 854         sdl_grab_start(0);
 855     }
 856
 857     mouse_mode_notifier.notify = sdl_mouse_mode_change;
 858     qemu_add_mouse_mode_change_notifier(&mouse_mode_notifier);
 859
 860     gui_grab = 0;
 861
 862     sdl_cursor_hidden = SDL_CreateCursor(&data, &data, 8, 1, 0, 0);
 863     sdl_cursor_normal = SDL_GetCursor();
 864
 865     atexit(sdl_cleanup);
 866 }