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_keysym;
  42 static int gui_grab_code = KMOD_LALT | KMOD_LCTRL;
  43 static SDL_Cursor *sdl_cursor_normal;
  44 static SDL_Cursor *sdl_cursor_hidden;
  45 static int absolute_enabled;
  46 static int guest_cursor;
  47 static int guest_x, guest_y;
  48 static SDL_Cursor *guest_sprite;
  49 static Notifier mouse_mode_notifier;
  50
  51 #define SDL2_REFRESH_INTERVAL_BUSY 10
  52 #define SDL2_MAX_IDLE_COUNT (2 * GUI_REFRESH_INTERVAL_DEFAULT \
  53                              / SDL2_REFRESH_INTERVAL_BUSY + 1)
  54
  55 static void sdl_update_caption(struct sdl2_console *scon);
  56
  57 static struct sdl2_console *get_scon_from_window(uint32_t window_id)
  58 {
  59     int i;
  60     for (i = 0; i < sdl2_num_outputs; i++) {
  61         if (sdl2_console[i].real_window == SDL_GetWindowFromID(window_id)) {
  62             return &sdl2_console[i];
  63         }
  64     }
  65     return NULL;
  66 }
  67
  68 void sdl2_window_create(struct sdl2_console *scon)
  69 {
  70     int flags = 0;
  71
  72     if (!scon->surface) {
  73         return;
  74     }
  75     assert(!scon->real_window);
  76
  77     if (gui_fullscreen) {
  78         flags |= SDL_WINDOW_FULLSCREEN_DESKTOP;
  79     } else {
  80         flags |= SDL_WINDOW_RESIZABLE;
  81     }
  82     if (scon->hidden) {
  83         flags |= SDL_WINDOW_HIDDEN;
  84     }
  85
  86     scon->real_window = SDL_CreateWindow("", SDL_WINDOWPOS_UNDEFINED,
  87                                          SDL_WINDOWPOS_UNDEFINED,
  88                                          surface_width(scon->surface),
  89                                          surface_height(scon->surface),
  90                                          flags);
  91     scon->real_renderer = SDL_CreateRenderer(scon->real_window, -1, 0);
  92     if (scon->opengl) {
  93         scon->winctx = SDL_GL_GetCurrentContext();
  94     }
  95     sdl_update_caption(scon);
  96 }
  97
  98 void sdl2_window_destroy(struct sdl2_console *scon)
  99 {
 100     if (!scon->real_window) {
 101         return;
 102     }
 103
 104     SDL_DestroyRenderer(scon->real_renderer);
 105     scon->real_renderer = NULL;
 106     SDL_DestroyWindow(scon->real_window);
 107     scon->real_window = NULL;
 108 }
 109
 110 void sdl2_window_resize(struct sdl2_console *scon)
 111 {
 112     if (!scon->real_window) {
 113         return;
 114     }
 115
 116     SDL_SetWindowSize(scon->real_window,
 117                       surface_width(scon->surface),
 118                       surface_height(scon->surface));
 119 }
 120
 121 static void sdl2_redraw(struct sdl2_console *scon)
 122 {
 123     if (scon->opengl) {
 124 #ifdef CONFIG_OPENGL
 125         sdl2_gl_redraw(scon);
 126 #endif
 127     } else {
 128         sdl2_2d_redraw(scon);
 129     }
 130 }
 131
 132 static void sdl_update_caption(struct sdl2_console *scon)
 133 {
 134     char win_title[1024];
 135     char icon_title[1024];
 136     const char *status = "";
 137
 138     if (!runstate_is_running()) {
 139         status = " [Stopped]";
 140     } else if (gui_grab) {
 141         if (alt_grab) {
 142             status = " - Press Ctrl-Alt-Shift-G to exit grab";
 143         } else if (ctrl_grab) {
 144             status = " - Press Right-Ctrl-G to exit grab";
 145         } else {
 146             status = " - Press Ctrl-Alt-G to exit grab";
 147         }
 148     }
 149
 150     if (qemu_name) {
 151         snprintf(win_title, sizeof(win_title), "QEMU (%s-%d)%s", qemu_name,
 152                  scon->idx, status);
 153         snprintf(icon_title, sizeof(icon_title), "QEMU (%s)", qemu_name);
 154     } else {
 155         snprintf(win_title, sizeof(win_title), "QEMU%s", status);
 156         snprintf(icon_title, sizeof(icon_title), "QEMU");
 157     }
 158
 159     if (scon->real_window) {
 160         SDL_SetWindowTitle(scon->real_window, win_title);
 161     }
 162 }
 163
 164 static void sdl_hide_cursor(void)
 165 {
 166     if (!cursor_hide) {
 167         return;
 168     }
 169
 170     SDL_ShowCursor(SDL_DISABLE);
 171     SDL_SetCursor(sdl_cursor_hidden);
 172
 173     if (!qemu_input_is_absolute()) {
 174         SDL_SetRelativeMouseMode(SDL_TRUE);
 175     }
 176 }
 177
 178 static void sdl_show_cursor(void)
 179 {
 180     if (!cursor_hide) {
 181         return;
 182     }
 183
 184     if (!qemu_input_is_absolute()) {
 185         SDL_SetRelativeMouseMode(SDL_FALSE);
 186     }
 187
 188     if (guest_cursor &&
 189         (gui_grab || qemu_input_is_absolute() || absolute_enabled)) {
 190         SDL_SetCursor(guest_sprite);
 191     } else {
 192         SDL_SetCursor(sdl_cursor_normal);
 193     }
 194
 195     SDL_ShowCursor(SDL_ENABLE);
 196 }
 197
 198 static void sdl_grab_start(struct sdl2_console *scon)
 199 {
 200     QemuConsole *con = scon ? scon->dcl.con : NULL;
 201
 202     if (!con || !qemu_console_is_graphic(con)) {
 203         return;
 204     }
 205     /*
 206      * If the application is not active, do not try to enter grab state. This
 207      * prevents 'SDL_WM_GrabInput(SDL_GRAB_ON)' from blocking all the
 208      * application (SDL bug).
 209      */
 210     if (!(SDL_GetWindowFlags(scon->real_window) & SDL_WINDOW_INPUT_FOCUS)) {
 211         return;
 212     }
 213     if (guest_cursor) {
 214         SDL_SetCursor(guest_sprite);
 215         if (!qemu_input_is_absolute() && !absolute_enabled) {
 216             SDL_WarpMouseInWindow(scon->real_window, guest_x, guest_y);
 217         }
 218     } else {
 219         sdl_hide_cursor();
 220     }
 221     SDL_SetWindowGrab(scon->real_window, SDL_TRUE);
 222     gui_grab = 1;
 223     sdl_update_caption(scon);
 224 }
 225
 226 static void sdl_grab_end(struct sdl2_console *scon)
 227 {
 228     SDL_SetWindowGrab(scon->real_window, SDL_FALSE);
 229     gui_grab = 0;
 230     sdl_show_cursor();
 231     sdl_update_caption(scon);
 232 }
 233
 234 static void absolute_mouse_grab(struct sdl2_console *scon)
 235 {
 236     int mouse_x, mouse_y;
 237     int scr_w, scr_h;
 238     SDL_GetMouseState(&mouse_x, &mouse_y);
 239     SDL_GetWindowSize(scon->real_window, &scr_w, &scr_h);
 240     if (mouse_x > 0 && mouse_x < scr_w - 1 &&
 241         mouse_y > 0 && mouse_y < scr_h - 1) {
 242         sdl_grab_start(scon);
 243     }
 244 }
 245
 246 static void sdl_mouse_mode_change(Notifier *notify, void *data)
 247 {
 248     if (qemu_input_is_absolute()) {
 249         if (!absolute_enabled) {
 250             absolute_enabled = 1;
 251             SDL_SetRelativeMouseMode(SDL_FALSE);
 252             absolute_mouse_grab(&sdl2_console[0]);
 253         }
 254     } else if (absolute_enabled) {
 255         if (!gui_fullscreen) {
 256             sdl_grab_end(&sdl2_console[0]);
 257         }
 258         absolute_enabled = 0;
 259     }
 260 }
 261
 262 static void sdl_send_mouse_event(struct sdl2_console *scon, int dx, int dy,
 263                                  int x, int y, int state)
 264 {
 265     static uint32_t bmap[INPUT_BUTTON__MAX] = {
 266         [INPUT_BUTTON_LEFT]       = SDL_BUTTON(SDL_BUTTON_LEFT),
 267         [INPUT_BUTTON_MIDDLE]     = SDL_BUTTON(SDL_BUTTON_MIDDLE),
 268         [INPUT_BUTTON_RIGHT]      = SDL_BUTTON(SDL_BUTTON_RIGHT),
 269     };
 270     static uint32_t prev_state;
 271
 272     if (prev_state != state) {
 273         qemu_input_update_buttons(scon->dcl.con, bmap, prev_state, state);
 274         prev_state = state;
 275     }
 276
 277     if (qemu_input_is_absolute()) {
 278         qemu_input_queue_abs(scon->dcl.con, INPUT_AXIS_X,
 279                              x, 0, surface_width(scon->surface));
 280         qemu_input_queue_abs(scon->dcl.con, INPUT_AXIS_Y,
 281                              y, 0, surface_height(scon->surface));
 282     } else {
 283         if (guest_cursor) {
 284             x -= guest_x;
 285             y -= guest_y;
 286             guest_x += x;
 287             guest_y += y;
 288             dx = x;
 289             dy = y;
 290         }
 291         qemu_input_queue_rel(scon->dcl.con, INPUT_AXIS_X, dx);
 292         qemu_input_queue_rel(scon->dcl.con, INPUT_AXIS_Y, dy);
 293     }
 294     qemu_input_event_sync();
 295 }
 296
 297 static void toggle_full_screen(struct sdl2_console *scon)
 298 {
 299     gui_fullscreen = !gui_fullscreen;
 300     if (gui_fullscreen) {
 301         SDL_SetWindowFullscreen(scon->real_window,
 302                                 SDL_WINDOW_FULLSCREEN_DESKTOP);
 303         gui_saved_grab = gui_grab;
 304         sdl_grab_start(scon);
 305     } else {
 306         if (!gui_saved_grab) {
 307             sdl_grab_end(scon);
 308         }
 309         SDL_SetWindowFullscreen(scon->real_window, 0);
 310     }
 311     sdl2_redraw(scon);
 312 }
 313
 314 static int get_mod_state(void)
 315 {
 316     SDL_Keymod mod = SDL_GetModState();
 317
 318     if (alt_grab) {
 319         return (mod & (gui_grab_code | KMOD_LSHIFT)) ==
 320             (gui_grab_code | KMOD_LSHIFT);
 321     } else if (ctrl_grab) {
 322         return (mod & KMOD_RCTRL) == KMOD_RCTRL;
 323     } else {
 324         return (mod & gui_grab_code) == gui_grab_code;
 325     }
 326 }
 327
 328 static void handle_keydown(SDL_Event *ev)
 329 {
 330     int win;
 331     struct sdl2_console *scon = get_scon_from_window(ev->key.windowID);
 332     int gui_key_modifier_pressed = get_mod_state();
 333
 334     if (!scon->ignore_hotkeys && gui_key_modifier_pressed && !ev->key.repeat) {
 335         switch (ev->key.keysym.scancode) {
 336         case SDL_SCANCODE_2:
 337         case SDL_SCANCODE_3:
 338         case SDL_SCANCODE_4:
 339         case SDL_SCANCODE_5:
 340         case SDL_SCANCODE_6:
 341         case SDL_SCANCODE_7:
 342         case SDL_SCANCODE_8:
 343         case SDL_SCANCODE_9:
 344             if (gui_grab) {
 345                 sdl_grab_end(scon);
 346             }
 347
 348             win = ev->key.keysym.scancode - SDL_SCANCODE_1;
 349             if (win < sdl2_num_outputs) {
 350                 sdl2_console[win].hidden = !sdl2_console[win].hidden;
 351                 if (sdl2_console[win].real_window) {
 352                     if (sdl2_console[win].hidden) {
 353                         SDL_HideWindow(sdl2_console[win].real_window);
 354                     } else {
 355                         SDL_ShowWindow(sdl2_console[win].real_window);
 356                     }
 357                 }
 358                 gui_keysym = 1;
 359             }
 360             break;
 361         case SDL_SCANCODE_F:
 362             toggle_full_screen(scon);
 363             gui_keysym = 1;
 364             break;
 365         case SDL_SCANCODE_G:
 366             gui_keysym = 1;
 367             if (!gui_grab) {
 368                 sdl_grab_start(scon);
 369             } else if (!gui_fullscreen) {
 370                 sdl_grab_end(scon);
 371             }
 372             break;
 373         case SDL_SCANCODE_U:
 374             sdl2_window_resize(scon);
 375             if (!scon->opengl) {
 376                 /* re-create scon->texture */
 377                 sdl2_2d_switch(&scon->dcl, scon->surface);
 378             }
 379             gui_keysym = 1;
 380             break;
 381 #if 0
 382         case SDL_SCANCODE_KP_PLUS:
 383         case SDL_SCANCODE_KP_MINUS:
 384             if (!gui_fullscreen) {
 385                 int scr_w, scr_h;
 386                 int width, height;
 387                 SDL_GetWindowSize(scon->real_window, &scr_w, &scr_h);
 388
 389                 width = MAX(scr_w + (ev->key.keysym.scancode ==
 390                                      SDL_SCANCODE_KP_PLUS ? 50 : -50),
 391                             160);
 392                 height = (surface_height(scon->surface) * width) /
 393                     surface_width(scon->surface);
 394                 fprintf(stderr, "%s: scale to %dx%d\n",
 395                         __func__, width, height);
 396                 sdl_scale(scon, width, height);
 397                 sdl2_redraw(scon);
 398                 gui_keysym = 1;
 399             }
 400 #endif
 401         default:
 402             break;
 403         }
 404     }
 405     if (!gui_keysym) {
 406         sdl2_process_key(scon, &ev->key);
 407     }
 408 }
 409
 410 static void handle_keyup(SDL_Event *ev)
 411 {
 412     struct sdl2_console *scon = get_scon_from_window(ev->key.windowID);
 413     int gui_key_modifier_pressed = get_mod_state();
 414
 415     scon->ignore_hotkeys = false;
 416
 417     if (!gui_key_modifier_pressed) {
 418         gui_keysym = 0;
 419     }
 420     if (!gui_keysym) {
 421         sdl2_process_key(scon, &ev->key);
 422     }
 423 }
 424
 425 static void handle_textinput(SDL_Event *ev)
 426 {
 427     struct sdl2_console *scon = get_scon_from_window(ev->text.windowID);
 428     QemuConsole *con = scon ? scon->dcl.con : NULL;
 429
 430     if (qemu_console_is_graphic(con)) {
 431         return;
 432     }
 433     kbd_put_string_console(con, ev->text.text, strlen(ev->text.text));
 434 }
 435
 436 static void handle_mousemotion(SDL_Event *ev)
 437 {
 438     int max_x, max_y;
 439     struct sdl2_console *scon = get_scon_from_window(ev->motion.windowID);
 440
 441     if (!scon || !qemu_console_is_graphic(scon->dcl.con)) {
 442         return;
 443     }
 444
 445     if (qemu_input_is_absolute() || absolute_enabled) {
 446         int scr_w, scr_h;
 447         SDL_GetWindowSize(scon->real_window, &scr_w, &scr_h);
 448         max_x = scr_w - 1;
 449         max_y = scr_h - 1;
 450         if (gui_grab && !gui_fullscreen
 451             && (ev->motion.x == 0 || ev->motion.y == 0 ||
 452                 ev->motion.x == max_x || ev->motion.y == max_y)) {
 453             sdl_grab_end(scon);
 454         }
 455         if (!gui_grab &&
 456             (ev->motion.x > 0 && ev->motion.x < max_x &&
 457              ev->motion.y > 0 && ev->motion.y < max_y)) {
 458             sdl_grab_start(scon);
 459         }
 460     }
 461     if (gui_grab || qemu_input_is_absolute() || absolute_enabled) {
 462         sdl_send_mouse_event(scon, ev->motion.xrel, ev->motion.yrel,
 463                              ev->motion.x, ev->motion.y, ev->motion.state);
 464     }
 465 }
 466
 467 static void handle_mousebutton(SDL_Event *ev)
 468 {
 469     int buttonstate = SDL_GetMouseState(NULL, NULL);
 470     SDL_MouseButtonEvent *bev;
 471     struct sdl2_console *scon = get_scon_from_window(ev->button.windowID);
 472
 473     if (!scon || !qemu_console_is_graphic(scon->dcl.con)) {
 474         return;
 475     }
 476
 477     bev = &ev->button;
 478     if (!gui_grab && !qemu_input_is_absolute()) {
 479         if (ev->type == SDL_MOUSEBUTTONUP && bev->button == SDL_BUTTON_LEFT) {
 480             /* start grabbing all events */
 481             sdl_grab_start(scon);
 482         }
 483     } else {
 484         if (ev->type == SDL_MOUSEBUTTONDOWN) {
 485             buttonstate |= SDL_BUTTON(bev->button);
 486         } else {
 487             buttonstate &= ~SDL_BUTTON(bev->button);
 488         }
 489         sdl_send_mouse_event(scon, 0, 0, bev->x, bev->y, buttonstate);
 490     }
 491 }
 492
 493 static void handle_mousewheel(SDL_Event *ev)
 494 {
 495     struct sdl2_console *scon = get_scon_from_window(ev->wheel.windowID);
 496     SDL_MouseWheelEvent *wev = &ev->wheel;
 497     InputButton btn;
 498
 499     if (!scon || !qemu_console_is_graphic(scon->dcl.con)) {
 500         return;
 501     }
 502
 503     if (wev->y > 0) {
 504         btn = INPUT_BUTTON_WHEEL_UP;
 505     } else if (wev->y < 0) {
 506         btn = INPUT_BUTTON_WHEEL_DOWN;
 507     } else {
 508         return;
 509     }
 510
 511     qemu_input_queue_btn(scon->dcl.con, btn, true);
 512     qemu_input_event_sync();
 513     qemu_input_queue_btn(scon->dcl.con, btn, false);
 514     qemu_input_event_sync();
 515 }
 516
 517 static void handle_windowevent(SDL_Event *ev)
 518 {
 519     struct sdl2_console *scon = get_scon_from_window(ev->window.windowID);
 520     bool allow_close = true;
 521
 522     if (!scon) {
 523         return;
 524     }
 525
 526     switch (ev->window.event) {
 527     case SDL_WINDOWEVENT_RESIZED:
 528         {
 529             QemuUIInfo info;
 530             memset(&info, 0, sizeof(info));
 531             info.width = ev->window.data1;
 532             info.height = ev->window.data2;
 533             dpy_set_ui_info(scon->dcl.con, &info);
 534         }
 535         sdl2_redraw(scon);
 536         break;
 537     case SDL_WINDOWEVENT_EXPOSED:
 538         sdl2_redraw(scon);
 539         break;
 540     case SDL_WINDOWEVENT_FOCUS_GAINED:
 541     case SDL_WINDOWEVENT_ENTER:
 542         if (!gui_grab && (qemu_input_is_absolute() || absolute_enabled)) {
 543             absolute_mouse_grab(scon);
 544         }
 545         /* If a new console window opened using a hotkey receives the
 546          * focus, SDL sends another KEYDOWN event to the new window,
 547          * closing the console window immediately after.
 548          *
 549          * Work around this by ignoring further hotkey events until a
 550          * key is released.
 551          */
 552         scon->ignore_hotkeys = get_mod_state();
 553         break;
 554     case SDL_WINDOWEVENT_FOCUS_LOST:
 555         if (gui_grab && !gui_fullscreen) {
 556             sdl_grab_end(scon);
 557         }
 558         break;
 559     case SDL_WINDOWEVENT_RESTORED:
 560         update_displaychangelistener(&scon->dcl, GUI_REFRESH_INTERVAL_DEFAULT);
 561         break;
 562     case SDL_WINDOWEVENT_MINIMIZED:
 563         update_displaychangelistener(&scon->dcl, 500);
 564         break;
 565     case SDL_WINDOWEVENT_CLOSE:
 566         if (qemu_console_is_graphic(scon->dcl.con)) {
 567             if (scon->opts->has_window_close && !scon->opts->window_close) {
 568                 allow_close = false;
 569             }
 570             if (allow_close) {
 571                 no_shutdown = 0;
 572                 qemu_system_shutdown_request(SHUTDOWN_CAUSE_HOST_UI);
 573             }
 574         } else {
 575             SDL_HideWindow(scon->real_window);
 576             scon->hidden = true;
 577         }
 578         break;
 579     case SDL_WINDOWEVENT_SHOWN:
 580         scon->hidden = false;
 581         break;
 582     case SDL_WINDOWEVENT_HIDDEN:
 583         scon->hidden = true;
 584         break;
 585     }
 586 }
 587
 588 void sdl2_poll_events(struct sdl2_console *scon)
 589 {
 590     SDL_Event ev1, *ev = &ev1;
 591     bool allow_close = true;
 592     int idle = 1;
 593
 594     if (scon->last_vm_running != runstate_is_running()) {
 595         scon->last_vm_running = runstate_is_running();
 596         sdl_update_caption(scon);
 597     }
 598
 599     while (SDL_PollEvent(ev)) {
 600         switch (ev->type) {
 601         case SDL_KEYDOWN:
 602             idle = 0;
 603             handle_keydown(ev);
 604             break;
 605         case SDL_KEYUP:
 606             idle = 0;
 607             handle_keyup(ev);
 608             break;
 609         case SDL_TEXTINPUT:
 610             idle = 0;
 611             handle_textinput(ev);
 612             break;
 613         case SDL_QUIT:
 614             if (scon->opts->has_window_close && !scon->opts->window_close) {
 615                 allow_close = false;
 616             }
 617             if (allow_close) {
 618                 no_shutdown = 0;
 619                 qemu_system_shutdown_request(SHUTDOWN_CAUSE_HOST_UI);
 620             }
 621             break;
 622         case SDL_MOUSEMOTION:
 623             idle = 0;
 624             handle_mousemotion(ev);
 625             break;
 626         case SDL_MOUSEBUTTONDOWN:
 627         case SDL_MOUSEBUTTONUP:
 628             idle = 0;
 629             handle_mousebutton(ev);
 630             break;
 631         case SDL_MOUSEWHEEL:
 632             idle = 0;
 633             handle_mousewheel(ev);
 634             break;
 635         case SDL_WINDOWEVENT:
 636             handle_windowevent(ev);
 637             break;
 638         default:
 639             break;
 640         }
 641     }
 642
 643     if (idle) {
 644         if (scon->idle_counter < SDL2_MAX_IDLE_COUNT) {
 645             scon->idle_counter++;
 646             if (scon->idle_counter >= SDL2_MAX_IDLE_COUNT) {
 647                 scon->dcl.update_interval = GUI_REFRESH_INTERVAL_DEFAULT;
 648             }
 649         }
 650     } else {
 651         scon->idle_counter = 0;
 652         scon->dcl.update_interval = SDL2_REFRESH_INTERVAL_BUSY;
 653     }
 654 }
 655
 656 static void sdl_mouse_warp(DisplayChangeListener *dcl,
 657                            int x, int y, int on)
 658 {
 659     struct sdl2_console *scon = container_of(dcl, struct sdl2_console, dcl);
 660
 661     if (!qemu_console_is_graphic(scon->dcl.con)) {
 662         return;
 663     }
 664
 665     if (on) {
 666         if (!guest_cursor) {
 667             sdl_show_cursor();
 668         }
 669         if (gui_grab || qemu_input_is_absolute() || absolute_enabled) {
 670             SDL_SetCursor(guest_sprite);
 671             if (!qemu_input_is_absolute() && !absolute_enabled) {
 672                 SDL_WarpMouseInWindow(scon->real_window, x, y);
 673             }
 674         }
 675     } else if (gui_grab) {
 676         sdl_hide_cursor();
 677     }
 678     guest_cursor = on;
 679     guest_x = x, guest_y = y;
 680 }
 681
 682 static void sdl_mouse_define(DisplayChangeListener *dcl,
 683                              QEMUCursor *c)
 684 {
 685
 686     if (guest_sprite) {
 687         SDL_FreeCursor(guest_sprite);
 688     }
 689
 690     if (guest_sprite_surface) {
 691         SDL_FreeSurface(guest_sprite_surface);
 692     }
 693
 694     guest_sprite_surface =
 695         SDL_CreateRGBSurfaceFrom(c->data, c->width, c->height, 32, c->width * 4,
 696                                  0xff0000, 0x00ff00, 0xff, 0xff000000);
 697
 698     if (!guest_sprite_surface) {
 699         fprintf(stderr, "Failed to make rgb surface from %p\n", c);
 700         return;
 701     }
 702     guest_sprite = SDL_CreateColorCursor(guest_sprite_surface,
 703                                          c->hot_x, c->hot_y);
 704     if (!guest_sprite) {
 705         fprintf(stderr, "Failed to make color cursor from %p\n", c);
 706         return;
 707     }
 708     if (guest_cursor &&
 709         (gui_grab || qemu_input_is_absolute() || absolute_enabled)) {
 710         SDL_SetCursor(guest_sprite);
 711     }
 712 }
 713
 714 static void sdl_cleanup(void)
 715 {
 716     if (guest_sprite) {
 717         SDL_FreeCursor(guest_sprite);
 718     }
 719     SDL_QuitSubSystem(SDL_INIT_VIDEO);
 720 }
 721
 722 static const DisplayChangeListenerOps dcl_2d_ops = {
 723     .dpy_name             = "sdl2-2d",
 724     .dpy_gfx_update       = sdl2_2d_update,
 725     .dpy_gfx_switch       = sdl2_2d_switch,
 726     .dpy_gfx_check_format = sdl2_2d_check_format,
 727     .dpy_refresh          = sdl2_2d_refresh,
 728     .dpy_mouse_set        = sdl_mouse_warp,
 729     .dpy_cursor_define    = sdl_mouse_define,
 730 };
 731
 732 #ifdef CONFIG_OPENGL
 733 static const DisplayChangeListenerOps dcl_gl_ops = {
 734     .dpy_name                = "sdl2-gl",
 735     .dpy_gfx_update          = sdl2_gl_update,
 736     .dpy_gfx_switch          = sdl2_gl_switch,
 737     .dpy_gfx_check_format    = console_gl_check_format,
 738     .dpy_refresh             = sdl2_gl_refresh,
 739     .dpy_mouse_set           = sdl_mouse_warp,
 740     .dpy_cursor_define       = sdl_mouse_define,
 741
 742     .dpy_gl_ctx_create       = sdl2_gl_create_context,
 743     .dpy_gl_ctx_destroy      = sdl2_gl_destroy_context,
 744     .dpy_gl_ctx_make_current = sdl2_gl_make_context_current,
 745     .dpy_gl_ctx_get_current  = sdl2_gl_get_current_context,
 746     .dpy_gl_scanout_disable  = sdl2_gl_scanout_disable,
 747     .dpy_gl_scanout_texture  = sdl2_gl_scanout_texture,
 748     .dpy_gl_update           = sdl2_gl_scanout_flush,
 749 };
 750 #endif
 751
 752 static void sdl2_display_early_init(DisplayOptions *o)
 753 {
 754     assert(o->type == DISPLAY_TYPE_SDL);
 755     if (o->has_gl && o->gl) {
 756 #ifdef CONFIG_OPENGL
 757         display_opengl = 1;
 758 #endif
 759     }
 760 }
 761
 762 static void sdl2_display_init(DisplayState *ds, DisplayOptions *o)
 763 {
 764     uint8_t data = 0;
 765     char *filename;
 766     int i;
 767     SDL_SysWMinfo info;
 768
 769     assert(o->type == DISPLAY_TYPE_SDL);
 770
 771 #ifdef __linux__
 772     /* on Linux, SDL may use fbcon|directfb|svgalib when run without
 773      * accessible $DISPLAY to open X11 window.  This is often the case
 774      * when qemu is run using sudo.  But in this case, and when actually
 775      * run in X11 environment, SDL fights with X11 for the video card,
 776      * making current display unavailable, often until reboot.
 777      * So make x11 the default SDL video driver if this variable is unset.
 778      * This is a bit hackish but saves us from bigger problem.
 779      * Maybe it's a good idea to fix this in SDL instead.
 780      */
 781     setenv("SDL_VIDEODRIVER", "x11", 0);
 782 #endif
 783
 784     if (SDL_Init(SDL_INIT_VIDEO)) {
 785         fprintf(stderr, "Could not initialize SDL(%s) - exiting\n",
 786                 SDL_GetError());
 787         exit(1);
 788     }
 789 #ifdef SDL_HINT_VIDEO_X11_NET_WM_BYPASS_COMPOSITOR /* only available since SDL 2.0.8 */
 790     SDL_SetHint(SDL_HINT_VIDEO_X11_NET_WM_BYPASS_COMPOSITOR, "0");
 791 #endif
 792     SDL_SetHint(SDL_HINT_GRAB_KEYBOARD, "1");
 793     memset(&info, 0, sizeof(info));
 794     SDL_VERSION(&info.version);
 795
 796     gui_fullscreen = o->has_full_screen && o->full_screen;
 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             qemu_console_get_index(con) != 0) {
 814             sdl2_console[i].hidden = true;
 815         }
 816         sdl2_console[i].idx = i;
 817         sdl2_console[i].opts = o;
 818 #ifdef CONFIG_OPENGL
 819         sdl2_console[i].opengl = display_opengl;
 820         sdl2_console[i].dcl.ops = display_opengl ? &dcl_gl_ops : &dcl_2d_ops;
 821 #else
 822         sdl2_console[i].opengl = 0;
 823         sdl2_console[i].dcl.ops = &dcl_2d_ops;
 824 #endif
 825         sdl2_console[i].dcl.con = con;
 826         register_displaychangelistener(&sdl2_console[i].dcl);
 827
 828 #if defined(SDL_VIDEO_DRIVER_WINDOWS) || defined(SDL_VIDEO_DRIVER_X11)
 829         if (SDL_GetWindowWMInfo(sdl2_console[i].real_window, &info)) {
 830 #if defined(SDL_VIDEO_DRIVER_WINDOWS)
 831             qemu_console_set_window_id(con, (uintptr_t)info.info.win.window);
 832 #elif defined(SDL_VIDEO_DRIVER_X11)
 833             qemu_console_set_window_id(con, info.info.x11.window);
 834 #endif
 835         }
 836 #endif
 837     }
 838
 839     /* Load a 32x32x4 image. White pixels are transparent. */
 840     filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, "qemu-icon.bmp");
 841     if (filename) {
 842         SDL_Surface *image = SDL_LoadBMP(filename);
 843         if (image) {
 844             uint32_t colorkey = SDL_MapRGB(image->format, 255, 255, 255);
 845             SDL_SetColorKey(image, SDL_TRUE, colorkey);
 846             SDL_SetWindowIcon(sdl2_console[0].real_window, image);
 847         }
 848         g_free(filename);
 849     }
 850
 851     gui_grab = 0;
 852     if (gui_fullscreen) {
 853         sdl_grab_start(0);
 854     }
 855
 856     mouse_mode_notifier.notify = sdl_mouse_mode_change;
 857     qemu_add_mouse_mode_change_notifier(&mouse_mode_notifier);
 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);