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_destroy(scon);
 375             sdl2_window_create(scon);
 376             if (!scon->opengl) {
 377                 /* re-create scon->texture */
 378                 sdl2_2d_switch(&scon->dcl, scon->surface);
 379             }
 380             gui_keysym = 1;
 381             break;
 382 #if 0
 383         case SDL_SCANCODE_KP_PLUS:
 384         case SDL_SCANCODE_KP_MINUS:
 385             if (!gui_fullscreen) {
 386                 int scr_w, scr_h;
 387                 int width, height;
 388                 SDL_GetWindowSize(scon->real_window, &scr_w, &scr_h);
 389
 390                 width = MAX(scr_w + (ev->key.keysym.scancode ==
 391                                      SDL_SCANCODE_KP_PLUS ? 50 : -50),
 392                             160);
 393                 height = (surface_height(scon->surface) * width) /
 394                     surface_width(scon->surface);
 395                 fprintf(stderr, "%s: scale to %dx%d\n",
 396                         __func__, width, height);
 397                 sdl_scale(scon, width, height);
 398                 sdl2_redraw(scon);
 399                 gui_keysym = 1;
 400             }
 401 #endif
 402         default:
 403             break;
 404         }
 405     }
 406     if (!gui_keysym) {
 407         sdl2_process_key(scon, &ev->key);
 408     }
 409 }
 410
 411 static void handle_keyup(SDL_Event *ev)
 412 {
 413     struct sdl2_console *scon = get_scon_from_window(ev->key.windowID);
 414     int gui_key_modifier_pressed = get_mod_state();
 415
 416     scon->ignore_hotkeys = false;
 417
 418     if (!gui_key_modifier_pressed) {
 419         gui_keysym = 0;
 420     }
 421     if (!gui_keysym) {
 422         sdl2_process_key(scon, &ev->key);
 423     }
 424 }
 425
 426 static void handle_textinput(SDL_Event *ev)
 427 {
 428     struct sdl2_console *scon = get_scon_from_window(ev->key.windowID);
 429     QemuConsole *con = scon ? scon->dcl.con : NULL;
 430
 431     if (qemu_console_is_graphic(con)) {
 432         return;
 433     }
 434     kbd_put_string_console(con, ev->text.text, strlen(ev->text.text));
 435 }
 436
 437 static void handle_mousemotion(SDL_Event *ev)
 438 {
 439     int max_x, max_y;
 440     struct sdl2_console *scon = get_scon_from_window(ev->key.windowID);
 441
 442     if (!qemu_console_is_graphic(scon->dcl.con)) {
 443         return;
 444     }
 445
 446     if (qemu_input_is_absolute() || absolute_enabled) {
 447         int scr_w, scr_h;
 448         SDL_GetWindowSize(scon->real_window, &scr_w, &scr_h);
 449         max_x = scr_w - 1;
 450         max_y = scr_h - 1;
 451         if (gui_grab && !gui_fullscreen
 452             && (ev->motion.x == 0 || ev->motion.y == 0 ||
 453                 ev->motion.x == max_x || ev->motion.y == max_y)) {
 454             sdl_grab_end(scon);
 455         }
 456         if (!gui_grab &&
 457             (ev->motion.x > 0 && ev->motion.x < max_x &&
 458              ev->motion.y > 0 && ev->motion.y < max_y)) {
 459             sdl_grab_start(scon);
 460         }
 461     }
 462     if (gui_grab || qemu_input_is_absolute() || absolute_enabled) {
 463         sdl_send_mouse_event(scon, ev->motion.xrel, ev->motion.yrel,
 464                              ev->motion.x, ev->motion.y, ev->motion.state);
 465     }
 466 }
 467
 468 static void handle_mousebutton(SDL_Event *ev)
 469 {
 470     int buttonstate = SDL_GetMouseState(NULL, NULL);
 471     SDL_MouseButtonEvent *bev;
 472     struct sdl2_console *scon = get_scon_from_window(ev->key.windowID);
 473
 474     if (!qemu_console_is_graphic(scon->dcl.con)) {
 475         return;
 476     }
 477
 478     bev = &ev->button;
 479     if (!gui_grab && !qemu_input_is_absolute()) {
 480         if (ev->type == SDL_MOUSEBUTTONUP && bev->button == SDL_BUTTON_LEFT) {
 481             /* start grabbing all events */
 482             sdl_grab_start(scon);
 483         }
 484     } else {
 485         if (ev->type == SDL_MOUSEBUTTONDOWN) {
 486             buttonstate |= SDL_BUTTON(bev->button);
 487         } else {
 488             buttonstate &= ~SDL_BUTTON(bev->button);
 489         }
 490         sdl_send_mouse_event(scon, 0, 0, bev->x, bev->y, buttonstate);
 491     }
 492 }
 493
 494 static void handle_mousewheel(SDL_Event *ev)
 495 {
 496     struct sdl2_console *scon = get_scon_from_window(ev->key.windowID);
 497     SDL_MouseWheelEvent *wev = &ev->wheel;
 498     InputButton btn;
 499
 500     if (!qemu_console_is_graphic(scon->dcl.con)) {
 501         return;
 502     }
 503
 504     if (wev->y > 0) {
 505         btn = INPUT_BUTTON_WHEEL_UP;
 506     } else if (wev->y < 0) {
 507         btn = INPUT_BUTTON_WHEEL_DOWN;
 508     } else {
 509         return;
 510     }
 511
 512     qemu_input_queue_btn(scon->dcl.con, btn, true);
 513     qemu_input_event_sync();
 514     qemu_input_queue_btn(scon->dcl.con, btn, false);
 515     qemu_input_event_sync();
 516 }
 517
 518 static void handle_windowevent(SDL_Event *ev)
 519 {
 520     struct sdl2_console *scon = get_scon_from_window(ev->window.windowID);
 521     bool allow_close = true;
 522
 523     if (!scon) {
 524         return;
 525     }
 526
 527     switch (ev->window.event) {
 528     case SDL_WINDOWEVENT_RESIZED:
 529         {
 530             QemuUIInfo info;
 531             memset(&info, 0, sizeof(info));
 532             info.width = ev->window.data1;
 533             info.height = ev->window.data2;
 534             dpy_set_ui_info(scon->dcl.con, &info);
 535         }
 536         sdl2_redraw(scon);
 537         break;
 538     case SDL_WINDOWEVENT_EXPOSED:
 539         sdl2_redraw(scon);
 540         break;
 541     case SDL_WINDOWEVENT_FOCUS_GAINED:
 542     case SDL_WINDOWEVENT_ENTER:
 543         if (!gui_grab && (qemu_input_is_absolute() || absolute_enabled)) {
 544             absolute_mouse_grab(scon);
 545         }
 546         /* If a new console window opened using a hotkey receives the
 547          * focus, SDL sends another KEYDOWN event to the new window,
 548          * closing the console window immediately after.
 549          *
 550          * Work around this by ignoring further hotkey events until a
 551          * key is released.
 552          */
 553         scon->ignore_hotkeys = get_mod_state();
 554         break;
 555     case SDL_WINDOWEVENT_FOCUS_LOST:
 556         if (gui_grab && !gui_fullscreen) {
 557             sdl_grab_end(scon);
 558         }
 559         break;
 560     case SDL_WINDOWEVENT_RESTORED:
 561         update_displaychangelistener(&scon->dcl, GUI_REFRESH_INTERVAL_DEFAULT);
 562         break;
 563     case SDL_WINDOWEVENT_MINIMIZED:
 564         update_displaychangelistener(&scon->dcl, 500);
 565         break;
 566     case SDL_WINDOWEVENT_CLOSE:
 567         if (qemu_console_is_graphic(scon->dcl.con)) {
 568             if (scon->opts->has_window_close && !scon->opts->window_close) {
 569                 allow_close = false;
 570             }
 571             if (allow_close) {
 572                 no_shutdown = 0;
 573                 qemu_system_shutdown_request(SHUTDOWN_CAUSE_HOST_UI);
 574             }
 575         } else {
 576             SDL_HideWindow(scon->real_window);
 577             scon->hidden = true;
 578         }
 579         break;
 580     case SDL_WINDOWEVENT_SHOWN:
 581         scon->hidden = false;
 582         break;
 583     case SDL_WINDOWEVENT_HIDDEN:
 584         scon->hidden = true;
 585         break;
 586     }
 587 }
 588
 589 void sdl2_poll_events(struct sdl2_console *scon)
 590 {
 591     SDL_Event ev1, *ev = &ev1;
 592     bool allow_close = true;
 593     int idle = 1;
 594
 595     if (scon->last_vm_running != runstate_is_running()) {
 596         scon->last_vm_running = runstate_is_running();
 597         sdl_update_caption(scon);
 598     }
 599
 600     while (SDL_PollEvent(ev)) {
 601         switch (ev->type) {
 602         case SDL_KEYDOWN:
 603             idle = 0;
 604             handle_keydown(ev);
 605             break;
 606         case SDL_KEYUP:
 607             idle = 0;
 608             handle_keyup(ev);
 609             break;
 610         case SDL_TEXTINPUT:
 611             idle = 0;
 612             handle_textinput(ev);
 613             break;
 614         case SDL_QUIT:
 615             if (scon->opts->has_window_close && !scon->opts->window_close) {
 616                 allow_close = false;
 617             }
 618             if (allow_close) {
 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 static void sdl2_display_early_init(DisplayOptions *o)
 754 {
 755     assert(o->type == DISPLAY_TYPE_SDL);
 756     if (o->has_gl && o->gl) {
 757 #ifdef CONFIG_OPENGL
 758         display_opengl = 1;
 759 #endif
 760     }
 761 }
 762
 763 static void sdl2_display_init(DisplayState *ds, DisplayOptions *o)
 764 {
 765     int flags;
 766     uint8_t data = 0;
 767     char *filename;
 768     int i;
 769     SDL_SysWMinfo info;
 770
 771     assert(o->type == DISPLAY_TYPE_SDL);
 772
 773 #ifdef __linux__
 774     /* on Linux, SDL may use fbcon|directfb|svgalib when run without
 775      * accessible $DISPLAY to open X11 window.  This is often the case
 776      * when qemu is run using sudo.  But in this case, and when actually
 777      * run in X11 environment, SDL fights with X11 for the video card,
 778      * making current display unavailable, often until reboot.
 779      * So make x11 the default SDL video driver if this variable is unset.
 780      * This is a bit hackish but saves us from bigger problem.
 781      * Maybe it's a good idea to fix this in SDL instead.
 782      */
 783     setenv("SDL_VIDEODRIVER", "x11", 0);
 784 #endif
 785
 786     flags = SDL_INIT_VIDEO | SDL_INIT_NOPARACHUTE;
 787     if (SDL_Init(flags)) {
 788         fprintf(stderr, "Could not initialize SDL(%s) - exiting\n",
 789                 SDL_GetError());
 790         exit(1);
 791     }
 792     SDL_SetHint(SDL_HINT_GRAB_KEYBOARD, "1");
 793     memset(&info, 0, sizeof(info));
 794     SDL_VERSION(&info.version);
 795
 796     for (i = 0;; i++) {
 797         QemuConsole *con = qemu_console_lookup_by_index(i);
 798         if (!con) {
 799             break;
 800         }
 801     }
 802     sdl2_num_outputs = i;
 803     if (sdl2_num_outputs == 0) {
 804         return;
 805     }
 806     sdl2_console = g_new0(struct sdl2_console, sdl2_num_outputs);
 807     for (i = 0; i < sdl2_num_outputs; i++) {
 808         QemuConsole *con = qemu_console_lookup_by_index(i);
 809         assert(con != NULL);
 810         if (!qemu_console_is_graphic(con)) {
 811             sdl2_console[i].hidden = true;
 812         }
 813         sdl2_console[i].idx = i;
 814         sdl2_console[i].opts = o;
 815 #ifdef CONFIG_OPENGL
 816         sdl2_console[i].opengl = display_opengl;
 817         sdl2_console[i].dcl.ops = display_opengl ? &dcl_gl_ops : &dcl_2d_ops;
 818 #else
 819         sdl2_console[i].opengl = 0;
 820         sdl2_console[i].dcl.ops = &dcl_2d_ops;
 821 #endif
 822         sdl2_console[i].dcl.con = con;
 823         register_displaychangelistener(&sdl2_console[i].dcl);
 824
 825 #if defined(SDL_VIDEO_DRIVER_WINDOWS) || defined(SDL_VIDEO_DRIVER_X11)
 826         if (SDL_GetWindowWMInfo(sdl2_console[i].real_window, &info)) {
 827 #if defined(SDL_VIDEO_DRIVER_WINDOWS)
 828             qemu_console_set_window_id(con, (uintptr_t)info.info.win.window);
 829 #elif defined(SDL_VIDEO_DRIVER_X11)
 830             qemu_console_set_window_id(con, info.info.x11.window);
 831 #endif
 832         }
 833 #endif
 834     }
 835
 836     /* Load a 32x32x4 image. White pixels are transparent. */
 837     filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, "qemu-icon.bmp");
 838     if (filename) {
 839         SDL_Surface *image = SDL_LoadBMP(filename);
 840         if (image) {
 841             uint32_t colorkey = SDL_MapRGB(image->format, 255, 255, 255);
 842             SDL_SetColorKey(image, SDL_TRUE, colorkey);
 843             SDL_SetWindowIcon(sdl2_console[0].real_window, image);
 844         }
 845         g_free(filename);
 846     }
 847
 848     if (sdl2_console->opts->has_full_screen &&
 849         sdl2_console->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);