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-common.h"
  27 #include "ui/console.h"
  28 #include "ui/input.h"
  29 #include "ui/sdl2.h"
  30 #include "sysemu/sysemu.h"
  31
  32 static int sdl2_num_outputs;
  33 static struct sdl2_console *sdl2_console;
  34
  35 static SDL_Surface *guest_sprite_surface;
  36 static int gui_grab; /* if true, all keyboard/mouse events are grabbed */
  37
  38 static int gui_saved_grab;
  39 static int gui_fullscreen;
  40 static int gui_noframe;
  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 to exit grab";
 144         } else if (ctrl_grab) {
 145             status = " - Press Right-Ctrl to exit grab";
 146         } else {
 147             status = " - Press Ctrl-Alt 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     if (qemu_input_is_absolute()) {
 172         SDL_ShowCursor(1);
 173         SDL_SetCursor(sdl_cursor_hidden);
 174     } else {
 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         SDL_ShowCursor(1);
 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 }
 196
 197 static void sdl_grab_start(struct sdl2_console *scon)
 198 {
 199     QemuConsole *con = scon ? scon->dcl.con : NULL;
 200
 201     if (!con || !qemu_console_is_graphic(con)) {
 202         return;
 203     }
 204     /*
 205      * If the application is not active, do not try to enter grab state. This
 206      * prevents 'SDL_WM_GrabInput(SDL_GRAB_ON)' from blocking all the
 207      * application (SDL bug).
 208      */
 209     if (!(SDL_GetWindowFlags(scon->real_window) & SDL_WINDOW_INPUT_FOCUS)) {
 210         return;
 211     }
 212     if (guest_cursor) {
 213         SDL_SetCursor(guest_sprite);
 214         if (!qemu_input_is_absolute() && !absolute_enabled) {
 215             SDL_WarpMouseInWindow(scon->real_window, guest_x, guest_y);
 216         }
 217     } else {
 218         sdl_hide_cursor();
 219     }
 220     SDL_SetWindowGrab(scon->real_window, SDL_TRUE);
 221     gui_grab = 1;
 222     sdl_update_caption(scon);
 223 }
 224
 225 static void sdl_grab_end(struct sdl2_console *scon)
 226 {
 227     SDL_SetWindowGrab(scon->real_window, SDL_FALSE);
 228     gui_grab = 0;
 229     sdl_show_cursor();
 230     sdl_update_caption(scon);
 231 }
 232
 233 static void absolute_mouse_grab(struct sdl2_console *scon)
 234 {
 235     int mouse_x, mouse_y;
 236     int scr_w, scr_h;
 237     SDL_GetMouseState(&mouse_x, &mouse_y);
 238     SDL_GetWindowSize(scon->real_window, &scr_w, &scr_h);
 239     if (mouse_x > 0 && mouse_x < scr_w - 1 &&
 240         mouse_y > 0 && mouse_y < scr_h - 1) {
 241         sdl_grab_start(scon);
 242     }
 243 }
 244
 245 static void sdl_mouse_mode_change(Notifier *notify, void *data)
 246 {
 247     if (qemu_input_is_absolute()) {
 248         if (!absolute_enabled) {
 249             absolute_enabled = 1;
 250             absolute_mouse_grab(&sdl2_console[0]);
 251         }
 252     } else if (absolute_enabled) {
 253         if (!gui_fullscreen) {
 254             sdl_grab_end(&sdl2_console[0]);
 255         }
 256         absolute_enabled = 0;
 257     }
 258 }
 259
 260 static void sdl_send_mouse_event(struct sdl2_console *scon, int dx, int dy,
 261                                  int x, int y, int state)
 262 {
 263     static uint32_t bmap[INPUT_BUTTON__MAX] = {
 264         [INPUT_BUTTON_LEFT]       = SDL_BUTTON(SDL_BUTTON_LEFT),
 265         [INPUT_BUTTON_MIDDLE]     = SDL_BUTTON(SDL_BUTTON_MIDDLE),
 266         [INPUT_BUTTON_RIGHT]      = SDL_BUTTON(SDL_BUTTON_RIGHT),
 267     };
 268     static uint32_t prev_state;
 269
 270     if (prev_state != state) {
 271         qemu_input_update_buttons(scon->dcl.con, bmap, prev_state, state);
 272         prev_state = state;
 273     }
 274
 275     if (qemu_input_is_absolute()) {
 276         int scr_w, scr_h;
 277         int max_w = 0, max_h = 0;
 278         int off_x = 0, off_y = 0;
 279         int cur_off_x = 0, cur_off_y = 0;
 280         int i;
 281
 282         for (i = 0; i < sdl2_num_outputs; i++) {
 283             struct sdl2_console *thiscon = &sdl2_console[i];
 284             if (thiscon->real_window && thiscon->surface) {
 285                 SDL_GetWindowSize(thiscon->real_window, &scr_w, &scr_h);
 286                 cur_off_x = thiscon->x;
 287                 cur_off_y = thiscon->y;
 288                 if (scr_w + cur_off_x > max_w) {
 289                     max_w = scr_w + cur_off_x;
 290                 }
 291                 if (scr_h + cur_off_y > max_h) {
 292                     max_h = scr_h + cur_off_y;
 293                 }
 294                 if (i == scon->idx) {
 295                     off_x = cur_off_x;
 296                     off_y = cur_off_y;
 297                 }
 298             }
 299         }
 300         qemu_input_queue_abs(scon->dcl.con, INPUT_AXIS_X, off_x + x, max_w);
 301         qemu_input_queue_abs(scon->dcl.con, INPUT_AXIS_Y, off_y + y, max_h);
 302     } else {
 303         if (guest_cursor) {
 304             x -= guest_x;
 305             y -= guest_y;
 306             guest_x += x;
 307             guest_y += y;
 308             dx = x;
 309             dy = y;
 310         }
 311         qemu_input_queue_rel(scon->dcl.con, INPUT_AXIS_X, dx);
 312         qemu_input_queue_rel(scon->dcl.con, INPUT_AXIS_Y, dy);
 313     }
 314     qemu_input_event_sync();
 315 }
 316
 317 static void toggle_full_screen(struct sdl2_console *scon)
 318 {
 319     gui_fullscreen = !gui_fullscreen;
 320     if (gui_fullscreen) {
 321         SDL_SetWindowFullscreen(scon->real_window,
 322                                 SDL_WINDOW_FULLSCREEN_DESKTOP);
 323         gui_saved_grab = gui_grab;
 324         sdl_grab_start(scon);
 325     } else {
 326         if (!gui_saved_grab) {
 327             sdl_grab_end(scon);
 328         }
 329         SDL_SetWindowFullscreen(scon->real_window, 0);
 330     }
 331     sdl2_redraw(scon);
 332 }
 333
 334 static void handle_keydown(SDL_Event *ev)
 335 {
 336     int mod_state, win;
 337     struct sdl2_console *scon = get_scon_from_window(ev->key.windowID);
 338
 339     if (alt_grab) {
 340         mod_state = (SDL_GetModState() & (gui_grab_code | KMOD_LSHIFT)) ==
 341             (gui_grab_code | KMOD_LSHIFT);
 342     } else if (ctrl_grab) {
 343         mod_state = (SDL_GetModState() & KMOD_RCTRL) == KMOD_RCTRL;
 344     } else {
 345         mod_state = (SDL_GetModState() & gui_grab_code) == gui_grab_code;
 346     }
 347     gui_key_modifier_pressed = mod_state;
 348
 349     if (gui_key_modifier_pressed) {
 350         switch (ev->key.keysym.scancode) {
 351         case SDL_SCANCODE_2:
 352         case SDL_SCANCODE_3:
 353         case SDL_SCANCODE_4:
 354         case SDL_SCANCODE_5:
 355         case SDL_SCANCODE_6:
 356         case SDL_SCANCODE_7:
 357         case SDL_SCANCODE_8:
 358         case SDL_SCANCODE_9:
 359             win = ev->key.keysym.scancode - SDL_SCANCODE_1;
 360             if (win < sdl2_num_outputs) {
 361                 sdl2_console[win].hidden = !sdl2_console[win].hidden;
 362                 if (sdl2_console[win].real_window) {
 363                     if (sdl2_console[win].hidden) {
 364                         SDL_HideWindow(sdl2_console[win].real_window);
 365                     } else {
 366                         SDL_ShowWindow(sdl2_console[win].real_window);
 367                     }
 368                 }
 369                 gui_keysym = 1;
 370             }
 371             break;
 372         case SDL_SCANCODE_F:
 373             toggle_full_screen(scon);
 374             gui_keysym = 1;
 375             break;
 376         case SDL_SCANCODE_U:
 377             sdl2_window_destroy(scon);
 378             sdl2_window_create(scon);
 379             if (!scon->opengl) {
 380                 /* re-create scon->texture */
 381                 sdl2_2d_switch(&scon->dcl, scon->surface);
 382             }
 383             gui_keysym = 1;
 384             break;
 385 #if 0
 386         case SDL_SCANCODE_KP_PLUS:
 387         case SDL_SCANCODE_KP_MINUS:
 388             if (!gui_fullscreen) {
 389                 int scr_w, scr_h;
 390                 int width, height;
 391                 SDL_GetWindowSize(scon->real_window, &scr_w, &scr_h);
 392
 393                 width = MAX(scr_w + (ev->key.keysym.scancode ==
 394                                      SDL_SCANCODE_KP_PLUS ? 50 : -50),
 395                             160);
 396                 height = (surface_height(scon->surface) * width) /
 397                     surface_width(scon->surface);
 398                 fprintf(stderr, "%s: scale to %dx%d\n",
 399                         __func__, width, height);
 400                 sdl_scale(scon, width, height);
 401                 sdl2_redraw(scon);
 402                 gui_keysym = 1;
 403             }
 404 #endif
 405         default:
 406             break;
 407         }
 408     }
 409     if (!gui_keysym) {
 410         sdl2_process_key(scon, &ev->key);
 411     }
 412 }
 413
 414 static void handle_keyup(SDL_Event *ev)
 415 {
 416     int mod_state;
 417     struct sdl2_console *scon = get_scon_from_window(ev->key.windowID);
 418
 419     if (!alt_grab) {
 420         mod_state = (ev->key.keysym.mod & gui_grab_code);
 421     } else {
 422         mod_state = (ev->key.keysym.mod & (gui_grab_code | KMOD_LSHIFT));
 423     }
 424     if (!mod_state && gui_key_modifier_pressed) {
 425         gui_key_modifier_pressed = 0;
 426         if (gui_keysym == 0) {
 427             /* exit/enter grab if pressing Ctrl-Alt */
 428             if (!gui_grab) {
 429                 sdl_grab_start(scon);
 430             } else if (!gui_fullscreen) {
 431                 sdl_grab_end(scon);
 432             }
 433             /* SDL does not send back all the modifiers key, so we must
 434              * correct it. */
 435             sdl2_reset_keys(scon);
 436             return;
 437         }
 438         gui_keysym = 0;
 439     }
 440     if (!gui_keysym) {
 441         sdl2_process_key(scon, &ev->key);
 442     }
 443 }
 444
 445 static void handle_textinput(SDL_Event *ev)
 446 {
 447     struct sdl2_console *scon = get_scon_from_window(ev->key.windowID);
 448     QemuConsole *con = scon ? scon->dcl.con : NULL;
 449
 450     if (qemu_console_is_graphic(con)) {
 451         return;
 452     }
 453     kbd_put_string_console(con, ev->text.text, strlen(ev->text.text));
 454 }
 455
 456 static void handle_mousemotion(SDL_Event *ev)
 457 {
 458     int max_x, max_y;
 459     struct sdl2_console *scon = get_scon_from_window(ev->key.windowID);
 460
 461     if (qemu_input_is_absolute() || absolute_enabled) {
 462         int scr_w, scr_h;
 463         SDL_GetWindowSize(scon->real_window, &scr_w, &scr_h);
 464         max_x = scr_w - 1;
 465         max_y = scr_h - 1;
 466         if (gui_grab && (ev->motion.x == 0 || ev->motion.y == 0 ||
 467                          ev->motion.x == max_x || ev->motion.y == max_y)) {
 468             sdl_grab_end(scon);
 469         }
 470         if (!gui_grab &&
 471             (ev->motion.x > 0 && ev->motion.x < max_x &&
 472              ev->motion.y > 0 && ev->motion.y < max_y)) {
 473             sdl_grab_start(scon);
 474         }
 475     }
 476     if (gui_grab || qemu_input_is_absolute() || absolute_enabled) {
 477         sdl_send_mouse_event(scon, ev->motion.xrel, ev->motion.yrel,
 478                              ev->motion.x, ev->motion.y, ev->motion.state);
 479     }
 480 }
 481
 482 static void handle_mousebutton(SDL_Event *ev)
 483 {
 484     int buttonstate = SDL_GetMouseState(NULL, NULL);
 485     SDL_MouseButtonEvent *bev;
 486     struct sdl2_console *scon = get_scon_from_window(ev->key.windowID);
 487
 488     bev = &ev->button;
 489     if (!gui_grab && !qemu_input_is_absolute()) {
 490         if (ev->type == SDL_MOUSEBUTTONUP && bev->button == SDL_BUTTON_LEFT) {
 491             /* start grabbing all events */
 492             sdl_grab_start(scon);
 493         }
 494     } else {
 495         if (ev->type == SDL_MOUSEBUTTONDOWN) {
 496             buttonstate |= SDL_BUTTON(bev->button);
 497         } else {
 498             buttonstate &= ~SDL_BUTTON(bev->button);
 499         }
 500         sdl_send_mouse_event(scon, 0, 0, bev->x, bev->y, buttonstate);
 501     }
 502 }
 503
 504 static void handle_mousewheel(SDL_Event *ev)
 505 {
 506     struct sdl2_console *scon = get_scon_from_window(ev->key.windowID);
 507     SDL_MouseWheelEvent *wev = &ev->wheel;
 508     InputButton btn;
 509
 510     if (wev->y > 0) {
 511         btn = INPUT_BUTTON_WHEELUP;
 512     } else if (wev->y < 0) {
 513         btn = INPUT_BUTTON_WHEELDOWN;
 514     } else {
 515         return;
 516     }
 517
 518     qemu_input_queue_btn(scon->dcl.con, btn, true);
 519     qemu_input_event_sync();
 520     qemu_input_queue_btn(scon->dcl.con, btn, false);
 521     qemu_input_event_sync();
 522 }
 523
 524 static void handle_windowevent(SDL_Event *ev)
 525 {
 526     struct sdl2_console *scon = get_scon_from_window(ev->window.windowID);
 527
 528     if (!scon) {
 529         return;
 530     }
 531
 532     switch (ev->window.event) {
 533     case SDL_WINDOWEVENT_RESIZED:
 534         {
 535             QemuUIInfo info;
 536             memset(&info, 0, sizeof(info));
 537             info.width = ev->window.data1;
 538             info.height = ev->window.data2;
 539             dpy_set_ui_info(scon->dcl.con, &info);
 540         }
 541         sdl2_redraw(scon);
 542         break;
 543     case SDL_WINDOWEVENT_EXPOSED:
 544         sdl2_redraw(scon);
 545         break;
 546     case SDL_WINDOWEVENT_FOCUS_GAINED:
 547     case SDL_WINDOWEVENT_ENTER:
 548         if (!gui_grab && (qemu_input_is_absolute() || absolute_enabled)) {
 549             absolute_mouse_grab(scon);
 550         }
 551         break;
 552     case SDL_WINDOWEVENT_FOCUS_LOST:
 553         if (gui_grab && !gui_fullscreen) {
 554             sdl_grab_end(scon);
 555         }
 556         break;
 557     case SDL_WINDOWEVENT_RESTORED:
 558         update_displaychangelistener(&scon->dcl, GUI_REFRESH_INTERVAL_DEFAULT);
 559         break;
 560     case SDL_WINDOWEVENT_MINIMIZED:
 561         update_displaychangelistener(&scon->dcl, 500);
 562         break;
 563     case SDL_WINDOWEVENT_CLOSE:
 564         if (!no_quit) {
 565             no_shutdown = 0;
 566             qemu_system_shutdown_request();
 567         }
 568         break;
 569     case SDL_WINDOWEVENT_SHOWN:
 570         if (scon->hidden) {
 571             SDL_HideWindow(scon->real_window);
 572         }
 573         break;
 574     case SDL_WINDOWEVENT_HIDDEN:
 575         if (!scon->hidden) {
 576             SDL_ShowWindow(scon->real_window);
 577         }
 578         break;
 579     }
 580 }
 581
 582 void sdl2_poll_events(struct sdl2_console *scon)
 583 {
 584     SDL_Event ev1, *ev = &ev1;
 585     int idle = 1;
 586
 587     if (scon->last_vm_running != runstate_is_running()) {
 588         scon->last_vm_running = runstate_is_running();
 589         sdl_update_caption(scon);
 590     }
 591
 592     while (SDL_PollEvent(ev)) {
 593         switch (ev->type) {
 594         case SDL_KEYDOWN:
 595             idle = 0;
 596             handle_keydown(ev);
 597             break;
 598         case SDL_KEYUP:
 599             idle = 0;
 600             handle_keyup(ev);
 601             break;
 602         case SDL_TEXTINPUT:
 603             idle = 0;
 604             handle_textinput(ev);
 605             break;
 606         case SDL_QUIT:
 607             if (!no_quit) {
 608                 no_shutdown = 0;
 609                 qemu_system_shutdown_request();
 610             }
 611             break;
 612         case SDL_MOUSEMOTION:
 613             idle = 0;
 614             handle_mousemotion(ev);
 615             break;
 616         case SDL_MOUSEBUTTONDOWN:
 617         case SDL_MOUSEBUTTONUP:
 618             idle = 0;
 619             handle_mousebutton(ev);
 620             break;
 621         case SDL_MOUSEWHEEL:
 622             idle = 0;
 623             handle_mousewheel(ev);
 624             break;
 625         case SDL_WINDOWEVENT:
 626             handle_windowevent(ev);
 627             break;
 628         default:
 629             break;
 630         }
 631     }
 632
 633     if (idle) {
 634         if (scon->idle_counter < SDL2_MAX_IDLE_COUNT) {
 635             scon->idle_counter++;
 636             if (scon->idle_counter >= SDL2_MAX_IDLE_COUNT) {
 637                 scon->dcl.update_interval = GUI_REFRESH_INTERVAL_DEFAULT;
 638             }
 639         }
 640     } else {
 641         scon->idle_counter = 0;
 642         scon->dcl.update_interval = SDL2_REFRESH_INTERVAL_BUSY;
 643     }
 644 }
 645
 646 static void sdl_mouse_warp(DisplayChangeListener *dcl,
 647                            int x, int y, int on)
 648 {
 649     struct sdl2_console *scon = container_of(dcl, struct sdl2_console, dcl);
 650     if (on) {
 651         if (!guest_cursor) {
 652             sdl_show_cursor();
 653         }
 654         if (gui_grab || qemu_input_is_absolute() || absolute_enabled) {
 655             SDL_SetCursor(guest_sprite);
 656             if (!qemu_input_is_absolute() && !absolute_enabled) {
 657                 SDL_WarpMouseInWindow(scon->real_window, x, y);
 658             }
 659         }
 660     } else if (gui_grab) {
 661         sdl_hide_cursor();
 662     }
 663     guest_cursor = on;
 664     guest_x = x, guest_y = y;
 665 }
 666
 667 static void sdl_mouse_define(DisplayChangeListener *dcl,
 668                              QEMUCursor *c)
 669 {
 670
 671     if (guest_sprite) {
 672         SDL_FreeCursor(guest_sprite);
 673     }
 674
 675     if (guest_sprite_surface) {
 676         SDL_FreeSurface(guest_sprite_surface);
 677     }
 678
 679     guest_sprite_surface =
 680         SDL_CreateRGBSurfaceFrom(c->data, c->width, c->height, 32, c->width * 4,
 681                                  0xff0000, 0x00ff00, 0xff, 0xff000000);
 682
 683     if (!guest_sprite_surface) {
 684         fprintf(stderr, "Failed to make rgb surface from %p\n", c);
 685         return;
 686     }
 687     guest_sprite = SDL_CreateColorCursor(guest_sprite_surface,
 688                                          c->hot_x, c->hot_y);
 689     if (!guest_sprite) {
 690         fprintf(stderr, "Failed to make color cursor from %p\n", c);
 691         return;
 692     }
 693     if (guest_cursor &&
 694         (gui_grab || qemu_input_is_absolute() || absolute_enabled)) {
 695         SDL_SetCursor(guest_sprite);
 696     }
 697 }
 698
 699 static void sdl_cleanup(void)
 700 {
 701     if (guest_sprite) {
 702         SDL_FreeCursor(guest_sprite);
 703     }
 704     SDL_QuitSubSystem(SDL_INIT_VIDEO);
 705 }
 706
 707 static const DisplayChangeListenerOps dcl_2d_ops = {
 708     .dpy_name             = "sdl2-2d",
 709     .dpy_gfx_update       = sdl2_2d_update,
 710     .dpy_gfx_switch       = sdl2_2d_switch,
 711     .dpy_gfx_check_format = sdl2_2d_check_format,
 712     .dpy_refresh          = sdl2_2d_refresh,
 713     .dpy_mouse_set        = sdl_mouse_warp,
 714     .dpy_cursor_define    = sdl_mouse_define,
 715 };
 716
 717 #ifdef CONFIG_OPENGL
 718 static const DisplayChangeListenerOps dcl_gl_ops = {
 719     .dpy_name                = "sdl2-gl",
 720     .dpy_gfx_update          = sdl2_gl_update,
 721     .dpy_gfx_switch          = sdl2_gl_switch,
 722     .dpy_gfx_check_format    = console_gl_check_format,
 723     .dpy_refresh             = sdl2_gl_refresh,
 724     .dpy_mouse_set           = sdl_mouse_warp,
 725     .dpy_cursor_define       = sdl_mouse_define,
 726
 727     .dpy_gl_ctx_create       = sdl2_gl_create_context,
 728     .dpy_gl_ctx_destroy      = sdl2_gl_destroy_context,
 729     .dpy_gl_ctx_make_current = sdl2_gl_make_context_current,
 730     .dpy_gl_ctx_get_current  = sdl2_gl_get_current_context,
 731     .dpy_gl_scanout          = sdl2_gl_scanout,
 732     .dpy_gl_update           = sdl2_gl_scanout_flush,
 733 };
 734 #endif
 735
 736 void sdl_display_early_init(int opengl)
 737 {
 738     switch (opengl) {
 739     case -1: /* default */
 740     case 0:  /* off */
 741         break;
 742     case 1: /* on */
 743 #ifdef CONFIG_OPENGL
 744         display_opengl = 1;
 745 #endif
 746         break;
 747     default:
 748         g_assert_not_reached();
 749         break;
 750     }
 751 }
 752
 753 void sdl_display_init(DisplayState *ds, int full_screen, int no_frame)
 754 {
 755     int flags;
 756     uint8_t data = 0;
 757     char *filename;
 758     int i;
 759
 760     if (no_frame) {
 761         gui_noframe = 1;
 762     }
 763
 764 #ifdef __linux__
 765     /* on Linux, SDL may use fbcon|directfb|svgalib when run without
 766      * accessible $DISPLAY to open X11 window.  This is often the case
 767      * when qemu is run using sudo.  But in this case, and when actually
 768      * run in X11 environment, SDL fights with X11 for the video card,
 769      * making current display unavailable, often until reboot.
 770      * So make x11 the default SDL video driver if this variable is unset.
 771      * This is a bit hackish but saves us from bigger problem.
 772      * Maybe it's a good idea to fix this in SDL instead.
 773      */
 774     setenv("SDL_VIDEODRIVER", "x11", 0);
 775 #endif
 776
 777     flags = SDL_INIT_VIDEO | SDL_INIT_NOPARACHUTE;
 778     if (SDL_Init(flags)) {
 779         fprintf(stderr, "Could not initialize SDL(%s) - exiting\n",
 780                 SDL_GetError());
 781         exit(1);
 782     }
 783     SDL_SetHint(SDL_HINT_GRAB_KEYBOARD, "1");
 784
 785     for (i = 0;; i++) {
 786         QemuConsole *con = qemu_console_lookup_by_index(i);
 787         if (!con) {
 788             break;
 789         }
 790     }
 791     sdl2_num_outputs = i;
 792     sdl2_console = g_new0(struct sdl2_console, sdl2_num_outputs);
 793     for (i = 0; i < sdl2_num_outputs; i++) {
 794         QemuConsole *con = qemu_console_lookup_by_index(i);
 795         if (!qemu_console_is_graphic(con)) {
 796             sdl2_console[i].hidden = true;
 797         }
 798         sdl2_console[i].idx = i;
 799 #ifdef CONFIG_OPENGL
 800         sdl2_console[i].opengl = display_opengl;
 801         sdl2_console[i].dcl.ops = display_opengl ? &dcl_gl_ops : &dcl_2d_ops;
 802 #else
 803         sdl2_console[i].opengl = 0;
 804         sdl2_console[i].dcl.ops = &dcl_2d_ops;
 805 #endif
 806         sdl2_console[i].dcl.con = con;
 807         register_displaychangelistener(&sdl2_console[i].dcl);
 808     }
 809
 810     /* Load a 32x32x4 image. White pixels are transparent. */
 811     filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, "qemu-icon.bmp");
 812     if (filename) {
 813         SDL_Surface *image = SDL_LoadBMP(filename);
 814         if (image) {
 815             uint32_t colorkey = SDL_MapRGB(image->format, 255, 255, 255);
 816             SDL_SetColorKey(image, SDL_TRUE, colorkey);
 817             SDL_SetWindowIcon(sdl2_console[0].real_window, image);
 818         }
 819         g_free(filename);
 820     }
 821
 822     if (full_screen) {
 823         gui_fullscreen = 1;
 824         sdl_grab_start(0);
 825     }
 826
 827     mouse_mode_notifier.notify = sdl_mouse_mode_change;
 828     qemu_add_mouse_mode_change_notifier(&mouse_mode_notifier);
 829
 830     gui_grab = 0;
 831
 832     sdl_cursor_hidden = SDL_CreateCursor(&data, &data, 8, 1, 0, 0);
 833     sdl_cursor_normal = SDL_GetCursor();
 834
 835     atexit(sdl_cleanup);
 836 }