sdl.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 #include "qemu-common.h"
  25 #include "console.h"
  26 #include "sysemu.h"
  27
  28 #include <SDL.h>
  29
  30 #ifndef _WIN32
  31 #include <signal.h>
  32 #endif
  33
  34 static SDL_Surface *screen;
  35 static int gui_grab; /* if true, all keyboard/mouse events are grabbed */
  36 static int last_vm_running;
  37 static int gui_saved_grab;
  38 static int gui_fullscreen;
  39 static int gui_noframe;
  40 static int gui_key_modifier_pressed;
  41 static int gui_keysym;
  42 static int gui_fullscreen_initial_grab;
  43 static int gui_grab_code = KMOD_LALT | KMOD_LCTRL;
  44 static uint8_t modifiers_state[256];
  45 static int width, height;
  46 static SDL_Cursor *sdl_cursor_normal;
  47 static SDL_Cursor *sdl_cursor_hidden;
  48 static int absolute_enabled = 0;
  49 static int guest_cursor = 0;
  50 static int guest_x, guest_y;
  51 static SDL_Cursor *guest_sprite = 0;
  52
  53 static void sdl_update(DisplayState *ds, int x, int y, int w, int h)
  54 {
  55     //    printf("updating x=%d y=%d w=%d h=%d\n", x, y, w, h);
  56     SDL_UpdateRect(screen, x, y, w, h);
  57 }
  58
  59 static void sdl_resize(DisplayState *ds, int w, int h)
  60 {
  61     int flags;
  62
  63     //    printf("resizing to %d %d\n", w, h);
  64
  65     flags = SDL_HWSURFACE|SDL_ASYNCBLIT|SDL_HWACCEL;
  66     if (gui_fullscreen)
  67         flags |= SDL_FULLSCREEN;
  68     if (gui_noframe)
  69         flags |= SDL_NOFRAME;
  70
  71     width = w;
  72     height = h;
  73
  74  again:
  75     screen = SDL_SetVideoMode(w, h, 0, flags);
  76     if (!screen) {
  77         fprintf(stderr, "Could not open SDL display\n");
  78         exit(1);
  79     }
  80     if (!screen->pixels && (flags & SDL_HWSURFACE) && (flags & SDL_FULLSCREEN)) {
  81         flags &= ~SDL_HWSURFACE;
  82         goto again;
  83     }
  84
  85     if (!screen->pixels) {
  86         fprintf(stderr, "Could not open SDL display\n");
  87         exit(1);
  88     }
  89     ds->data = screen->pixels;
  90     ds->linesize = screen->pitch;
  91     ds->depth = screen->format->BitsPerPixel;
  92     if (screen->format->Bshift > screen->format->Rshift) {
  93         ds->bgr = 1;
  94     } else {
  95         ds->bgr = 0;
  96     }
  97     ds->width = w;
  98     ds->height = h;
  99 }
 100
 101 /* generic keyboard conversion */
 102
 103 #include "sdl_keysym.h"
 104 #include "keymaps.c"
 105
 106 static kbd_layout_t *kbd_layout = NULL;
 107
 108 static uint8_t sdl_keyevent_to_keycode_generic(const SDL_KeyboardEvent *ev)
 109 {
 110     int keysym;
 111     /* workaround for X11+SDL bug with AltGR */
 112     keysym = ev->keysym.sym;
 113     if (keysym == 0 && ev->keysym.scancode == 113)
 114         keysym = SDLK_MODE;
 115     /* For Japanese key '\' and '|' */
 116     if (keysym == 92 && ev->keysym.scancode == 133) {
 117         keysym = 0xa5;
 118     }
 119     return keysym2scancode(kbd_layout, keysym);
 120 }
 121
 122 /* specific keyboard conversions from scan codes */
 123
 124 #if defined(_WIN32)
 125
 126 static uint8_t sdl_keyevent_to_keycode(const SDL_KeyboardEvent *ev)
 127 {
 128     return ev->keysym.scancode;
 129 }
 130
 131 #else
 132
 133 static uint8_t sdl_keyevent_to_keycode(const SDL_KeyboardEvent *ev)
 134 {
 135     int keycode;
 136
 137     keycode = ev->keysym.scancode;
 138
 139     if (keycode < 9) {
 140         keycode = 0;
 141     } else if (keycode < 97) {
 142         keycode -= 8; /* just an offset */
 143     } else if (keycode < 212) {
 144         /* use conversion table */
 145         keycode = _translate_keycode(keycode - 97);
 146     } else {
 147         keycode = 0;
 148     }
 149     return keycode;
 150 }
 151
 152 #endif
 153
 154 static void reset_keys(void)
 155 {
 156     int i;
 157     for(i = 0; i < 256; i++) {
 158         if (modifiers_state[i]) {
 159             if (i & 0x80)
 160                 kbd_put_keycode(0xe0);
 161             kbd_put_keycode(i | 0x80);
 162             modifiers_state[i] = 0;
 163         }
 164     }
 165 }
 166
 167 static void sdl_process_key(SDL_KeyboardEvent *ev)
 168 {
 169     int keycode, v;
 170
 171     if (ev->keysym.sym == SDLK_PAUSE) {
 172         /* specific case */
 173         v = 0;
 174         if (ev->type == SDL_KEYUP)
 175             v |= 0x80;
 176         kbd_put_keycode(0xe1);
 177         kbd_put_keycode(0x1d | v);
 178         kbd_put_keycode(0x45 | v);
 179         return;
 180     }
 181
 182     if (kbd_layout) {
 183         keycode = sdl_keyevent_to_keycode_generic(ev);
 184     } else {
 185         keycode = sdl_keyevent_to_keycode(ev);
 186     }
 187
 188     switch(keycode) {
 189     case 0x00:
 190         /* sent when leaving window: reset the modifiers state */
 191         reset_keys();
 192         return;
 193     case 0x2a:                          /* Left Shift */
 194     case 0x36:                          /* Right Shift */
 195     case 0x1d:                          /* Left CTRL */
 196     case 0x9d:                          /* Right CTRL */
 197     case 0x38:                          /* Left ALT */
 198     case 0xb8:                         /* Right ALT */
 199         if (ev->type == SDL_KEYUP)
 200             modifiers_state[keycode] = 0;
 201         else
 202             modifiers_state[keycode] = 1;
 203         break;
 204     case 0x45: /* num lock */
 205     case 0x3a: /* caps lock */
 206         /* SDL does not send the key up event, so we generate it */
 207         kbd_put_keycode(keycode);
 208         kbd_put_keycode(keycode | 0x80);
 209         return;
 210     }
 211
 212     /* now send the key code */
 213     if (keycode & 0x80)
 214         kbd_put_keycode(0xe0);
 215     if (ev->type == SDL_KEYUP)
 216         kbd_put_keycode(keycode | 0x80);
 217     else
 218         kbd_put_keycode(keycode & 0x7f);
 219 }
 220
 221 static void sdl_update_caption(void)
 222 {
 223     char buf[1024];
 224     const char *status = "";
 225
 226     if (!vm_running)
 227         status = " [Stopped]";
 228     else if (gui_grab) {
 229         if (!alt_grab)
 230             status = " - Press Ctrl-Alt to exit grab";
 231         else
 232             status = " - Press Ctrl-Alt-Shift to exit grab";
 233     }
 234
 235     if (qemu_name)
 236         snprintf(buf, sizeof(buf), "QEMU (%s)%s", qemu_name, status);
 237     else
 238         snprintf(buf, sizeof(buf), "QEMU%s", status);
 239
 240     SDL_WM_SetCaption(buf, "QEMU");
 241 }
 242
 243 static void sdl_hide_cursor(void)
 244 {
 245     if (!cursor_hide)
 246         return;
 247
 248     if (kbd_mouse_is_absolute()) {
 249         SDL_ShowCursor(1);
 250         SDL_SetCursor(sdl_cursor_hidden);
 251     } else {
 252         SDL_ShowCursor(0);
 253     }
 254 }
 255
 256 static void sdl_show_cursor(void)
 257 {
 258     if (!cursor_hide)
 259         return;
 260
 261     if (!kbd_mouse_is_absolute()) {
 262         SDL_ShowCursor(1);
 263         if (guest_cursor &&
 264                 (gui_grab || kbd_mouse_is_absolute() || absolute_enabled))
 265             SDL_SetCursor(guest_sprite);
 266         else
 267             SDL_SetCursor(sdl_cursor_normal);
 268     }
 269 }
 270
 271 static void sdl_grab_start(void)
 272 {
 273     if (guest_cursor) {
 274         SDL_SetCursor(guest_sprite);
 275         SDL_WarpMouse(guest_x, guest_y);
 276     } else
 277         sdl_hide_cursor();
 278     SDL_WM_GrabInput(SDL_GRAB_ON);
 279     gui_grab = 1;
 280     sdl_update_caption();
 281 }
 282
 283 static void sdl_grab_end(void)
 284 {
 285     SDL_WM_GrabInput(SDL_GRAB_OFF);
 286     gui_grab = 0;
 287     sdl_show_cursor();
 288     sdl_update_caption();
 289 }
 290
 291 static void sdl_send_mouse_event(int dx, int dy, int dz, int x, int y, int state)
 292 {
 293     int buttons;
 294     buttons = 0;
 295     if (state & SDL_BUTTON(SDL_BUTTON_LEFT))
 296         buttons |= MOUSE_EVENT_LBUTTON;
 297     if (state & SDL_BUTTON(SDL_BUTTON_RIGHT))
 298         buttons |= MOUSE_EVENT_RBUTTON;
 299     if (state & SDL_BUTTON(SDL_BUTTON_MIDDLE))
 300         buttons |= MOUSE_EVENT_MBUTTON;
 301
 302     if (kbd_mouse_is_absolute()) {
 303         if (!absolute_enabled) {
 304             sdl_hide_cursor();
 305             if (gui_grab) {
 306                 sdl_grab_end();
 307             }
 308             absolute_enabled = 1;
 309         }
 310
 311        dx = x * 0x7FFF / (width - 1);
 312        dy = y * 0x7FFF / (height - 1);
 313     } else if (absolute_enabled) {
 314         sdl_show_cursor();
 315         absolute_enabled = 0;
 316     } else if (guest_cursor) {
 317         x -= guest_x;
 318         y -= guest_y;
 319         guest_x += x;
 320         guest_y += y;
 321         dx = x;
 322         dy = y;
 323     }
 324
 325     kbd_mouse_event(dx, dy, dz, buttons);
 326 }
 327
 328 static void toggle_full_screen(DisplayState *ds)
 329 {
 330     gui_fullscreen = !gui_fullscreen;
 331     sdl_resize(ds, screen->w, screen->h);
 332     if (gui_fullscreen) {
 333         gui_saved_grab = gui_grab;
 334         sdl_grab_start();
 335     } else {
 336         if (!gui_saved_grab)
 337             sdl_grab_end();
 338     }
 339     vga_hw_invalidate();
 340     vga_hw_update();
 341 }
 342
 343 static void sdl_refresh(DisplayState *ds)
 344 {
 345     SDL_Event ev1, *ev = &ev1;
 346     int mod_state;
 347     int buttonstate = SDL_GetMouseState(NULL, NULL);
 348
 349     if (last_vm_running != vm_running) {
 350         last_vm_running = vm_running;
 351         sdl_update_caption();
 352     }
 353
 354     vga_hw_update();
 355     SDL_EnableUNICODE(!is_graphic_console());
 356
 357     while (SDL_PollEvent(ev)) {
 358         switch (ev->type) {
 359         case SDL_VIDEOEXPOSE:
 360             sdl_update(ds, 0, 0, screen->w, screen->h);
 361             break;
 362         case SDL_KEYDOWN:
 363         case SDL_KEYUP:
 364             if (ev->type == SDL_KEYDOWN) {
 365                 if (!alt_grab) {
 366                     mod_state = (SDL_GetModState() & gui_grab_code) ==
 367                                 gui_grab_code;
 368                 } else {
 369                     mod_state = (SDL_GetModState() & (gui_grab_code | KMOD_LSHIFT)) ==
 370                                 (gui_grab_code | KMOD_LSHIFT);
 371                 }
 372                 gui_key_modifier_pressed = mod_state;
 373                 if (gui_key_modifier_pressed) {
 374                     int keycode;
 375                     keycode = sdl_keyevent_to_keycode(&ev->key);
 376                     switch(keycode) {
 377                     case 0x21: /* 'f' key on US keyboard */
 378                         toggle_full_screen(ds);
 379                         gui_keysym = 1;
 380                         break;
 381                     case 0x02 ... 0x0a: /* '1' to '9' keys */
 382                         /* Reset the modifiers sent to the current console */
 383                         reset_keys();
 384                         console_select(keycode - 0x02);
 385                         if (!is_graphic_console()) {
 386                             /* display grab if going to a text console */
 387                             if (gui_grab)
 388                                 sdl_grab_end();
 389                         }
 390                         gui_keysym = 1;
 391                         break;
 392                     default:
 393                         break;
 394                     }
 395                 } else if (!is_graphic_console()) {
 396                     int keysym;
 397                     keysym = 0;
 398                     if (ev->key.keysym.mod & (KMOD_LCTRL | KMOD_RCTRL)) {
 399                         switch(ev->key.keysym.sym) {
 400                         case SDLK_UP: keysym = QEMU_KEY_CTRL_UP; break;
 401                         case SDLK_DOWN: keysym = QEMU_KEY_CTRL_DOWN; break;
 402                         case SDLK_LEFT: keysym = QEMU_KEY_CTRL_LEFT; break;
 403                         case SDLK_RIGHT: keysym = QEMU_KEY_CTRL_RIGHT; break;
 404                         case SDLK_HOME: keysym = QEMU_KEY_CTRL_HOME; break;
 405                         case SDLK_END: keysym = QEMU_KEY_CTRL_END; break;
 406                         case SDLK_PAGEUP: keysym = QEMU_KEY_CTRL_PAGEUP; break;
 407                         case SDLK_PAGEDOWN: keysym = QEMU_KEY_CTRL_PAGEDOWN; break;
 408                         default: break;
 409                         }
 410                     } else {
 411                         switch(ev->key.keysym.sym) {
 412                         case SDLK_UP: keysym = QEMU_KEY_UP; break;
 413                         case SDLK_DOWN: keysym = QEMU_KEY_DOWN; break;
 414                         case SDLK_LEFT: keysym = QEMU_KEY_LEFT; break;
 415                         case SDLK_RIGHT: keysym = QEMU_KEY_RIGHT; break;
 416                         case SDLK_HOME: keysym = QEMU_KEY_HOME; break;
 417                         case SDLK_END: keysym = QEMU_KEY_END; break;
 418                         case SDLK_PAGEUP: keysym = QEMU_KEY_PAGEUP; break;
 419                         case SDLK_PAGEDOWN: keysym = QEMU_KEY_PAGEDOWN; break;
 420                         case SDLK_BACKSPACE: keysym = QEMU_KEY_BACKSPACE; break;
 421                         case SDLK_DELETE: keysym = QEMU_KEY_DELETE; break;
 422                         default: break;
 423                         }
 424                     }
 425                     if (keysym) {
 426                         kbd_put_keysym(keysym);
 427                     } else if (ev->key.keysym.unicode != 0) {
 428                         kbd_put_keysym(ev->key.keysym.unicode);
 429                     }
 430                 }
 431             } else if (ev->type == SDL_KEYUP) {
 432                 if (!alt_grab) {
 433                     mod_state = (ev->key.keysym.mod & gui_grab_code);
 434                 } else {
 435                     mod_state = (ev->key.keysym.mod &
 436                                  (gui_grab_code | KMOD_LSHIFT));
 437                 }
 438                 if (!mod_state) {
 439                     if (gui_key_modifier_pressed) {
 440                         gui_key_modifier_pressed = 0;
 441                         if (gui_keysym == 0) {
 442                             /* exit/enter grab if pressing Ctrl-Alt */
 443                             if (!gui_grab) {
 444                                 /* if the application is not active,
 445                                    do not try to enter grab state. It
 446                                    prevents
 447                                    'SDL_WM_GrabInput(SDL_GRAB_ON)'
 448                                    from blocking all the application
 449                                    (SDL bug). */
 450                                 if (SDL_GetAppState() & SDL_APPACTIVE)
 451                                     sdl_grab_start();
 452                             } else {
 453                                 sdl_grab_end();
 454                             }
 455                             /* SDL does not send back all the
 456                                modifiers key, so we must correct it */
 457                             reset_keys();
 458                             break;
 459                         }
 460                         gui_keysym = 0;
 461                     }
 462                 }
 463             }
 464             if (is_graphic_console() && !gui_keysym)
 465                 sdl_process_key(&ev->key);
 466             break;
 467         case SDL_QUIT:
 468             if (!no_quit) {
 469                 qemu_system_shutdown_request();
 470                 vm_start();     /* In case we're paused */
 471             }
 472             break;
 473         case SDL_MOUSEMOTION:
 474             if (gui_grab || kbd_mouse_is_absolute() ||
 475                 absolute_enabled) {
 476                 sdl_send_mouse_event(ev->motion.xrel, ev->motion.yrel, 0,
 477                        ev->motion.x, ev->motion.y, ev->motion.state);
 478             }
 479             break;
 480         case SDL_MOUSEBUTTONDOWN:
 481         case SDL_MOUSEBUTTONUP:
 482             {
 483                 SDL_MouseButtonEvent *bev = &ev->button;
 484                 if (!gui_grab && !kbd_mouse_is_absolute()) {
 485                     if (ev->type == SDL_MOUSEBUTTONDOWN &&
 486                         (bev->button == SDL_BUTTON_LEFT)) {
 487                         /* start grabbing all events */
 488                         sdl_grab_start();
 489                     }
 490                 } else {
 491                     int dz;
 492                     dz = 0;
 493                     if (ev->type == SDL_MOUSEBUTTONDOWN) {
 494                         buttonstate |= SDL_BUTTON(bev->button);
 495                     } else {
 496                         buttonstate &= ~SDL_BUTTON(bev->button);
 497                     }
 498 #ifdef SDL_BUTTON_WHEELUP
 499                     if (bev->button == SDL_BUTTON_WHEELUP && ev->type == SDL_MOUSEBUTTONDOWN) {
 500                         dz = -1;
 501                     } else if (bev->button == SDL_BUTTON_WHEELDOWN && ev->type == SDL_MOUSEBUTTONDOWN) {
 502                         dz = 1;
 503                     }
 504 #endif
 505                     sdl_send_mouse_event(0, 0, dz, bev->x, bev->y, buttonstate);
 506                 }
 507             }
 508             break;
 509         case SDL_ACTIVEEVENT:
 510             if (gui_grab && ev->active.state == SDL_APPINPUTFOCUS &&
 511                 !ev->active.gain && !gui_fullscreen_initial_grab) {
 512                 sdl_grab_end();
 513             }
 514             if (ev->active.state & SDL_APPACTIVE) {
 515                 if (ev->active.gain) {
 516                     /* Back to default interval */
 517                     ds->gui_timer_interval = 0;
 518                 } else {
 519                     /* Sleeping interval */
 520                     ds->gui_timer_interval = 500;
 521                 }
 522             }
 523             break;
 524         default:
 525             break;
 526         }
 527     }
 528 }
 529
 530 static void sdl_fill(DisplayState *ds, int x, int y, int w, int h, uint32_t c)
 531 {
 532     SDL_Rect dst = { x, y, w, h };
 533     SDL_FillRect(screen, &dst, c);
 534 }
 535
 536 static void sdl_mouse_warp(int x, int y, int on)
 537 {
 538     if (on) {
 539         if (!guest_cursor)
 540             sdl_show_cursor();
 541         if (gui_grab || kbd_mouse_is_absolute() || absolute_enabled) {
 542             SDL_SetCursor(guest_sprite);
 543             SDL_WarpMouse(x, y);
 544         }
 545     } else if (gui_grab)
 546         sdl_hide_cursor();
 547     guest_cursor = on;
 548     guest_x = x, guest_y = y;
 549 }
 550
 551 static void sdl_mouse_define(int width, int height, int bpp,
 552                              int hot_x, int hot_y,
 553                              uint8_t *image, uint8_t *mask)
 554 {
 555     uint8_t sprite[256], *line;
 556     int x, y, dst, bypl, src = 0;
 557     if (guest_sprite)
 558         SDL_FreeCursor(guest_sprite);
 559
 560     memset(sprite, 0, 256);
 561     bypl = ((width * bpp + 31) >> 5) << 2;
 562     for (y = 0, dst = 0; y < height; y ++, image += bypl) {
 563         line = image;
 564         for (x = 0; x < width; x ++, dst ++) {
 565             switch (bpp) {
 566             case 24:
 567                 src = *(line ++); src |= *(line ++); src |= *(line ++);
 568                 break;
 569             case 16:
 570             case 15:
 571                 src = *(line ++); src |= *(line ++);
 572                 break;
 573             case 8:
 574                 src = *(line ++);
 575                 break;
 576             case 4:
 577                 src = 0xf & (line[x >> 1] >> ((x & 1)) << 2);
 578                 break;
 579             case 2:
 580                 src = 3 & (line[x >> 2] >> ((x & 3)) << 1);
 581                 break;
 582             case 1:
 583                 src = 1 & (line[x >> 3] >> (x & 7));
 584                 break;
 585             }
 586             if (!src)
 587                 sprite[dst >> 3] |= (1 << (~dst & 7)) & mask[dst >> 3];
 588         }
 589     }
 590     guest_sprite = SDL_CreateCursor(sprite, mask, width, height, hot_x, hot_y);
 591
 592     if (guest_cursor &&
 593             (gui_grab || kbd_mouse_is_absolute() || absolute_enabled))
 594         SDL_SetCursor(guest_sprite);
 595 }
 596
 597 static void sdl_cleanup(void)
 598 {
 599     if (guest_sprite)
 600         SDL_FreeCursor(guest_sprite);
 601     SDL_Quit();
 602 }
 603
 604 void sdl_display_init(DisplayState *ds, int full_screen, int no_frame)
 605 {
 606     int flags;
 607     uint8_t data = 0;
 608
 609 #if defined(__APPLE__)
 610     /* always use generic keymaps */
 611     if (!keyboard_layout)
 612         keyboard_layout = "en-us";
 613 #endif
 614     if(keyboard_layout) {
 615         kbd_layout = init_keyboard_layout(keyboard_layout);
 616         if (!kbd_layout)
 617             exit(1);
 618     }
 619
 620     if (no_frame)
 621         gui_noframe = 1;
 622
 623     flags = SDL_INIT_VIDEO | SDL_INIT_NOPARACHUTE;
 624     if (SDL_Init (flags)) {
 625         fprintf(stderr, "Could not initialize SDL - exiting\n");
 626         exit(1);
 627     }
 628 #ifndef _WIN32
 629     /* NOTE: we still want Ctrl-C to work, so we undo the SDL redirections */
 630     signal(SIGINT, SIG_DFL);
 631     signal(SIGQUIT, SIG_DFL);
 632 #endif
 633
 634     ds->dpy_update = sdl_update;
 635     ds->dpy_resize = sdl_resize;
 636     ds->dpy_refresh = sdl_refresh;
 637     ds->dpy_fill = sdl_fill;
 638     ds->mouse_set = sdl_mouse_warp;
 639     ds->cursor_define = sdl_mouse_define;
 640
 641     sdl_resize(ds, 640, 400);
 642     sdl_update_caption();
 643     SDL_EnableKeyRepeat(250, 50);
 644     gui_grab = 0;
 645
 646     sdl_cursor_hidden = SDL_CreateCursor(&data, &data, 8, 1, 0, 0);
 647     sdl_cursor_normal = SDL_GetCursor();
 648
 649     atexit(sdl_cleanup);
 650     if (full_screen) {
 651         gui_fullscreen = 1;
 652         gui_fullscreen_initial_grab = 1;
 653         sdl_grab_start();
 654     }
 655 }