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 #include "x_keymap.h"
  28
  29 #include <SDL.h>
  30 #include <SDL/SDL_syswm.h>
  31
  32 #ifndef _WIN32
  33 #include <signal.h>
  34 #endif
  35
  36 static DisplayChangeListener *dcl;
  37 static SDL_Surface *real_screen;
  38 static SDL_Surface *guest_screen = NULL;
  39 static int gui_grab; /* if true, all keyboard/mouse events are grabbed */
  40 static int last_vm_running;
  41 static int gui_saved_grab;
  42 static int gui_fullscreen;
  43 static int gui_noframe;
  44 static int gui_key_modifier_pressed;
  45 static int gui_keysym;
  46 static int gui_fullscreen_initial_grab;
  47 static int gui_grab_code = KMOD_LALT | KMOD_LCTRL;
  48 static uint8_t modifiers_state[256];
  49 static int width, height;
  50 static SDL_Cursor *sdl_cursor_normal;
  51 static SDL_Cursor *sdl_cursor_hidden;
  52 static int absolute_enabled = 0;
  53 static int guest_cursor = 0;
  54 static int guest_x, guest_y;
  55 static SDL_Cursor *guest_sprite = 0;
  56
  57 static void sdl_update(DisplayState *ds, int x, int y, int w, int h)
  58 {
  59     SDL_Rect rec;
  60     rec.x = x;
  61     rec.y = y;
  62     rec.w = w;
  63     rec.h = h;
  64     //    printf("updating x=%d y=%d w=%d h=%d\n", x, y, w, h);
  65
  66     SDL_BlitSurface(guest_screen, &rec, real_screen, &rec);
  67     SDL_UpdateRect(real_screen, x, y, w, h);
  68 }
  69
  70 static void sdl_setdata(DisplayState *ds)
  71 {
  72     SDL_Rect rec;
  73     rec.x = 0;
  74     rec.y = 0;
  75     rec.w = real_screen->w;
  76     rec.h = real_screen->h;
  77
  78     if (guest_screen != NULL) SDL_FreeSurface(guest_screen);
  79
  80     guest_screen = SDL_CreateRGBSurfaceFrom(ds_get_data(ds), ds_get_width(ds), ds_get_height(ds),
  81                                             ds_get_bits_per_pixel(ds), ds_get_linesize(ds),
  82                                             ds->surface->pf.rmask, ds->surface->pf.gmask,
  83                                             ds->surface->pf.bmask, ds->surface->pf.amask);
  84 }
  85
  86 static void sdl_resize(DisplayState *ds)
  87 {
  88     int flags;
  89
  90     //    printf("resizing to %d %d\n", w, h);
  91
  92     flags = SDL_HWSURFACE|SDL_ASYNCBLIT|SDL_HWACCEL;
  93     if (gui_fullscreen)
  94         flags |= SDL_FULLSCREEN;
  95     if (gui_noframe)
  96         flags |= SDL_NOFRAME;
  97
  98     width = ds_get_width(ds);
  99     height = ds_get_height(ds);
 100     real_screen = SDL_SetVideoMode(width, height, 0, flags);
 101     if (!real_screen) {
 102         fprintf(stderr, "Could not open SDL display\n");
 103         exit(1);
 104     }
 105
 106     sdl_setdata(ds);
 107 }
 108
 109 /* generic keyboard conversion */
 110
 111 #include "sdl_keysym.h"
 112
 113 static kbd_layout_t *kbd_layout = NULL;
 114
 115 static uint8_t sdl_keyevent_to_keycode_generic(const SDL_KeyboardEvent *ev)
 116 {
 117     int keysym;
 118     /* workaround for X11+SDL bug with AltGR */
 119     keysym = ev->keysym.sym;
 120     if (keysym == 0 && ev->keysym.scancode == 113)
 121         keysym = SDLK_MODE;
 122     /* For Japanese key '\' and '|' */
 123     if (keysym == 92 && ev->keysym.scancode == 133) {
 124         keysym = 0xa5;
 125     }
 126     return keysym2scancode(kbd_layout, keysym);
 127 }
 128
 129 /* specific keyboard conversions from scan codes */
 130
 131 #if defined(_WIN32)
 132
 133 static uint8_t sdl_keyevent_to_keycode(const SDL_KeyboardEvent *ev)
 134 {
 135     return ev->keysym.scancode;
 136 }
 137
 138 #else
 139
 140 #if defined(SDL_VIDEO_DRIVER_X11)
 141 #include <X11/XKBlib.h>
 142
 143 static int check_for_evdev(void)
 144 {
 145     SDL_SysWMinfo info;
 146     XkbDescPtr desc;
 147     int has_evdev = 0;
 148     const char *keycodes;
 149
 150     SDL_VERSION(&info.version);
 151     if (!SDL_GetWMInfo(&info))
 152         return 0;
 153
 154     desc = XkbGetKeyboard(info.info.x11.display,
 155                           XkbGBN_AllComponentsMask,
 156                           XkbUseCoreKbd);
 157     if (desc == NULL || desc->names == NULL)
 158         return 0;
 159
 160     keycodes = XGetAtomName(info.info.x11.display, desc->names->keycodes);
 161     if (keycodes == NULL)
 162         fprintf(stderr, "could not lookup keycode name\n");
 163     else if (strstart(keycodes, "evdev_", NULL))
 164         has_evdev = 1;
 165     else if (!strstart(keycodes, "xfree86_", NULL))
 166         fprintf(stderr,
 167                 "unknown keycodes `%s', please report to qemu-devel@nongnu.org\n",
 168                 keycodes);
 169
 170     XkbFreeClientMap(desc, XkbGBN_AllComponentsMask, True);
 171
 172     return has_evdev;
 173 }
 174 #else
 175 static int check_for_evdev(void)
 176 {
 177         return 0;
 178 }
 179 #endif
 180
 181 static uint8_t sdl_keyevent_to_keycode(const SDL_KeyboardEvent *ev)
 182 {
 183     int keycode;
 184     static int has_evdev = -1;
 185
 186     if (has_evdev == -1)
 187         has_evdev = check_for_evdev();
 188
 189     keycode = ev->keysym.scancode;
 190
 191     if (keycode < 9) {
 192         keycode = 0;
 193     } else if (keycode < 97) {
 194         keycode -= 8; /* just an offset */
 195     } else if (keycode < 158) {
 196         /* use conversion table */
 197         if (has_evdev)
 198             keycode = translate_evdev_keycode(keycode - 97);
 199         else
 200             keycode = translate_xfree86_keycode(keycode - 97);
 201     } else if (keycode == 208) { /* Hiragana_Katakana */
 202         keycode = 0x70;
 203     } else if (keycode == 211) { /* backslash */
 204         keycode = 0x73;
 205     } else {
 206         keycode = 0;
 207     }
 208     return keycode;
 209 }
 210
 211 #endif
 212
 213 static void reset_keys(void)
 214 {
 215     int i;
 216     for(i = 0; i < 256; i++) {
 217         if (modifiers_state[i]) {
 218             if (i & 0x80)
 219                 kbd_put_keycode(0xe0);
 220             kbd_put_keycode(i | 0x80);
 221             modifiers_state[i] = 0;
 222         }
 223     }
 224 }
 225
 226 static void sdl_process_key(SDL_KeyboardEvent *ev)
 227 {
 228     int keycode, v;
 229
 230     if (ev->keysym.sym == SDLK_PAUSE) {
 231         /* specific case */
 232         v = 0;
 233         if (ev->type == SDL_KEYUP)
 234             v |= 0x80;
 235         kbd_put_keycode(0xe1);
 236         kbd_put_keycode(0x1d | v);
 237         kbd_put_keycode(0x45 | v);
 238         return;
 239     }
 240
 241     if (kbd_layout) {
 242         keycode = sdl_keyevent_to_keycode_generic(ev);
 243     } else {
 244         keycode = sdl_keyevent_to_keycode(ev);
 245     }
 246
 247     switch(keycode) {
 248     case 0x00:
 249         /* sent when leaving window: reset the modifiers state */
 250         reset_keys();
 251         return;
 252     case 0x2a:                          /* Left Shift */
 253     case 0x36:                          /* Right Shift */
 254     case 0x1d:                          /* Left CTRL */
 255     case 0x9d:                          /* Right CTRL */
 256     case 0x38:                          /* Left ALT */
 257     case 0xb8:                         /* Right ALT */
 258         if (ev->type == SDL_KEYUP)
 259             modifiers_state[keycode] = 0;
 260         else
 261             modifiers_state[keycode] = 1;
 262         break;
 263     case 0x45: /* num lock */
 264     case 0x3a: /* caps lock */
 265         /* SDL does not send the key up event, so we generate it */
 266         kbd_put_keycode(keycode);
 267         kbd_put_keycode(keycode | 0x80);
 268         return;
 269     }
 270
 271     /* now send the key code */
 272     if (keycode & 0x80)
 273         kbd_put_keycode(0xe0);
 274     if (ev->type == SDL_KEYUP)
 275         kbd_put_keycode(keycode | 0x80);
 276     else
 277         kbd_put_keycode(keycode & 0x7f);
 278 }
 279
 280 static void sdl_update_caption(void)
 281 {
 282     char buf[1024];
 283     const char *status = "";
 284
 285     if (!vm_running)
 286         status = " [Stopped]";
 287     else if (gui_grab) {
 288         if (!alt_grab)
 289             status = " - Press Ctrl-Alt to exit grab";
 290         else
 291             status = " - Press Ctrl-Alt-Shift to exit grab";
 292     }
 293
 294     if (qemu_name)
 295         snprintf(buf, sizeof(buf), "QEMU (%s)%s", qemu_name, status);
 296     else
 297         snprintf(buf, sizeof(buf), "QEMU%s", status);
 298
 299     SDL_WM_SetCaption(buf, "QEMU");
 300 }
 301
 302 static void sdl_hide_cursor(void)
 303 {
 304     if (!cursor_hide)
 305         return;
 306
 307     if (kbd_mouse_is_absolute()) {
 308         SDL_ShowCursor(1);
 309         SDL_SetCursor(sdl_cursor_hidden);
 310     } else {
 311         SDL_ShowCursor(0);
 312     }
 313 }
 314
 315 static void sdl_show_cursor(void)
 316 {
 317     if (!cursor_hide)
 318         return;
 319
 320     if (!kbd_mouse_is_absolute()) {
 321         SDL_ShowCursor(1);
 322         if (guest_cursor &&
 323                 (gui_grab || kbd_mouse_is_absolute() || absolute_enabled))
 324             SDL_SetCursor(guest_sprite);
 325         else
 326             SDL_SetCursor(sdl_cursor_normal);
 327     }
 328 }
 329
 330 static void sdl_grab_start(void)
 331 {
 332     if (guest_cursor) {
 333         SDL_SetCursor(guest_sprite);
 334         if (!kbd_mouse_is_absolute() && !absolute_enabled)
 335             SDL_WarpMouse(guest_x, guest_y);
 336     } else
 337         sdl_hide_cursor();
 338
 339     if (SDL_WM_GrabInput(SDL_GRAB_ON) == SDL_GRAB_ON) {
 340         gui_grab = 1;
 341         sdl_update_caption();
 342     } else
 343         sdl_show_cursor();
 344 }
 345
 346 static void sdl_grab_end(void)
 347 {
 348     SDL_WM_GrabInput(SDL_GRAB_OFF);
 349     gui_grab = 0;
 350     sdl_show_cursor();
 351     sdl_update_caption();
 352 }
 353
 354 static void sdl_send_mouse_event(int dx, int dy, int dz, int x, int y, int state)
 355 {
 356     int buttons;
 357     buttons = 0;
 358     if (state & SDL_BUTTON(SDL_BUTTON_LEFT))
 359         buttons |= MOUSE_EVENT_LBUTTON;
 360     if (state & SDL_BUTTON(SDL_BUTTON_RIGHT))
 361         buttons |= MOUSE_EVENT_RBUTTON;
 362     if (state & SDL_BUTTON(SDL_BUTTON_MIDDLE))
 363         buttons |= MOUSE_EVENT_MBUTTON;
 364
 365     if (kbd_mouse_is_absolute()) {
 366         if (!absolute_enabled) {
 367             sdl_hide_cursor();
 368             if (gui_grab) {
 369                 sdl_grab_end();
 370             }
 371             absolute_enabled = 1;
 372         }
 373
 374        dx = x * 0x7FFF / (width - 1);
 375        dy = y * 0x7FFF / (height - 1);
 376     } else if (absolute_enabled) {
 377         sdl_show_cursor();
 378         absolute_enabled = 0;
 379     } else if (guest_cursor) {
 380         x -= guest_x;
 381         y -= guest_y;
 382         guest_x += x;
 383         guest_y += y;
 384         dx = x;
 385         dy = y;
 386     }
 387
 388     kbd_mouse_event(dx, dy, dz, buttons);
 389 }
 390
 391 static void toggle_full_screen(DisplayState *ds)
 392 {
 393     gui_fullscreen = !gui_fullscreen;
 394     sdl_resize(ds);
 395     if (gui_fullscreen) {
 396         gui_saved_grab = gui_grab;
 397         sdl_grab_start();
 398     } else {
 399         if (!gui_saved_grab)
 400             sdl_grab_end();
 401     }
 402     vga_hw_invalidate();
 403     vga_hw_update();
 404 }
 405
 406 static void sdl_refresh(DisplayState *ds)
 407 {
 408     SDL_Event ev1, *ev = &ev1;
 409     int mod_state;
 410     int buttonstate = SDL_GetMouseState(NULL, NULL);
 411
 412     if (last_vm_running != vm_running) {
 413         last_vm_running = vm_running;
 414         sdl_update_caption();
 415     }
 416
 417     vga_hw_update();
 418     SDL_EnableUNICODE(!is_graphic_console());
 419
 420     while (SDL_PollEvent(ev)) {
 421         switch (ev->type) {
 422         case SDL_VIDEOEXPOSE:
 423             sdl_update(ds, 0, 0, real_screen->w, real_screen->h);
 424             break;
 425         case SDL_KEYDOWN:
 426         case SDL_KEYUP:
 427             if (ev->type == SDL_KEYDOWN) {
 428                 if (!alt_grab) {
 429                     mod_state = (SDL_GetModState() & gui_grab_code) ==
 430                                 gui_grab_code;
 431                 } else {
 432                     mod_state = (SDL_GetModState() & (gui_grab_code | KMOD_LSHIFT)) ==
 433                                 (gui_grab_code | KMOD_LSHIFT);
 434                 }
 435                 gui_key_modifier_pressed = mod_state;
 436                 if (gui_key_modifier_pressed) {
 437                     int keycode;
 438                     keycode = sdl_keyevent_to_keycode(&ev->key);
 439                     switch(keycode) {
 440                     case 0x21: /* 'f' key on US keyboard */
 441                         toggle_full_screen(ds);
 442                         gui_keysym = 1;
 443                         break;
 444                     case 0x02 ... 0x0a: /* '1' to '9' keys */
 445                         /* Reset the modifiers sent to the current console */
 446                         reset_keys();
 447                         console_select(keycode - 0x02);
 448                         if (!is_graphic_console()) {
 449                             /* display grab if going to a text console */
 450                             if (gui_grab)
 451                                 sdl_grab_end();
 452                         }
 453                         gui_keysym = 1;
 454                         break;
 455                     default:
 456                         break;
 457                     }
 458                 } else if (!is_graphic_console()) {
 459                     int keysym;
 460                     keysym = 0;
 461                     if (ev->key.keysym.mod & (KMOD_LCTRL | KMOD_RCTRL)) {
 462                         switch(ev->key.keysym.sym) {
 463                         case SDLK_UP: keysym = QEMU_KEY_CTRL_UP; break;
 464                         case SDLK_DOWN: keysym = QEMU_KEY_CTRL_DOWN; break;
 465                         case SDLK_LEFT: keysym = QEMU_KEY_CTRL_LEFT; break;
 466                         case SDLK_RIGHT: keysym = QEMU_KEY_CTRL_RIGHT; break;
 467                         case SDLK_HOME: keysym = QEMU_KEY_CTRL_HOME; break;
 468                         case SDLK_END: keysym = QEMU_KEY_CTRL_END; break;
 469                         case SDLK_PAGEUP: keysym = QEMU_KEY_CTRL_PAGEUP; break;
 470                         case SDLK_PAGEDOWN: keysym = QEMU_KEY_CTRL_PAGEDOWN; break;
 471                         default: break;
 472                         }
 473                     } else {
 474                         switch(ev->key.keysym.sym) {
 475                         case SDLK_UP: keysym = QEMU_KEY_UP; break;
 476                         case SDLK_DOWN: keysym = QEMU_KEY_DOWN; break;
 477                         case SDLK_LEFT: keysym = QEMU_KEY_LEFT; break;
 478                         case SDLK_RIGHT: keysym = QEMU_KEY_RIGHT; break;
 479                         case SDLK_HOME: keysym = QEMU_KEY_HOME; break;
 480                         case SDLK_END: keysym = QEMU_KEY_END; break;
 481                         case SDLK_PAGEUP: keysym = QEMU_KEY_PAGEUP; break;
 482                         case SDLK_PAGEDOWN: keysym = QEMU_KEY_PAGEDOWN; break;
 483                         case SDLK_BACKSPACE: keysym = QEMU_KEY_BACKSPACE; break;
 484                         case SDLK_DELETE: keysym = QEMU_KEY_DELETE; break;
 485                         default: break;
 486                         }
 487                     }
 488                     if (keysym) {
 489                         kbd_put_keysym(keysym);
 490                     } else if (ev->key.keysym.unicode != 0) {
 491                         kbd_put_keysym(ev->key.keysym.unicode);
 492                     }
 493                 }
 494             } else if (ev->type == SDL_KEYUP) {
 495                 if (!alt_grab) {
 496                     mod_state = (ev->key.keysym.mod & gui_grab_code);
 497                 } else {
 498                     mod_state = (ev->key.keysym.mod &
 499                                  (gui_grab_code | KMOD_LSHIFT));
 500                 }
 501                 if (!mod_state) {
 502                     if (gui_key_modifier_pressed) {
 503                         gui_key_modifier_pressed = 0;
 504                         if (gui_keysym == 0) {
 505                             /* exit/enter grab if pressing Ctrl-Alt */
 506                             if (!gui_grab) {
 507                                 /* if the application is not active,
 508                                    do not try to enter grab state. It
 509                                    prevents
 510                                    'SDL_WM_GrabInput(SDL_GRAB_ON)'
 511                                    from blocking all the application
 512                                    (SDL bug). */
 513                                 if (SDL_GetAppState() & SDL_APPACTIVE)
 514                                     sdl_grab_start();
 515                             } else {
 516                                 sdl_grab_end();
 517                             }
 518                             /* SDL does not send back all the
 519                                modifiers key, so we must correct it */
 520                             reset_keys();
 521                             break;
 522                         }
 523                         gui_keysym = 0;
 524                     }
 525                 }
 526             }
 527             if (is_graphic_console() && !gui_keysym)
 528                 sdl_process_key(&ev->key);
 529             break;
 530         case SDL_QUIT:
 531             if (!no_quit)
 532                 qemu_system_shutdown_request();
 533             break;
 534         case SDL_MOUSEMOTION:
 535             if (gui_grab || kbd_mouse_is_absolute() ||
 536                 absolute_enabled) {
 537                 sdl_send_mouse_event(ev->motion.xrel, ev->motion.yrel, 0,
 538                        ev->motion.x, ev->motion.y, ev->motion.state);
 539             }
 540             break;
 541         case SDL_MOUSEBUTTONDOWN:
 542         case SDL_MOUSEBUTTONUP:
 543             {
 544                 SDL_MouseButtonEvent *bev = &ev->button;
 545                 if (!gui_grab && !kbd_mouse_is_absolute()) {
 546                     if (ev->type == SDL_MOUSEBUTTONDOWN &&
 547                         (bev->button == SDL_BUTTON_LEFT)) {
 548                         /* start grabbing all events */
 549                         sdl_grab_start();
 550                     }
 551                 } else {
 552                     int dz;
 553                     dz = 0;
 554                     if (ev->type == SDL_MOUSEBUTTONDOWN) {
 555                         buttonstate |= SDL_BUTTON(bev->button);
 556                     } else {
 557                         buttonstate &= ~SDL_BUTTON(bev->button);
 558                     }
 559 #ifdef SDL_BUTTON_WHEELUP
 560                     if (bev->button == SDL_BUTTON_WHEELUP && ev->type == SDL_MOUSEBUTTONDOWN) {
 561                         dz = -1;
 562                     } else if (bev->button == SDL_BUTTON_WHEELDOWN && ev->type == SDL_MOUSEBUTTONDOWN) {
 563                         dz = 1;
 564                     }
 565 #endif
 566                     sdl_send_mouse_event(0, 0, dz, bev->x, bev->y, buttonstate);
 567                 }
 568             }
 569             break;
 570         case SDL_ACTIVEEVENT:
 571             if (gui_grab && ev->active.state == SDL_APPINPUTFOCUS &&
 572                 !ev->active.gain && !gui_fullscreen_initial_grab) {
 573                 sdl_grab_end();
 574             }
 575             if (ev->active.state & SDL_APPACTIVE) {
 576                 if (ev->active.gain) {
 577                     /* Back to default interval */
 578                     dcl->gui_timer_interval = 0;
 579                     dcl->idle = 0;
 580                 } else {
 581                     /* Sleeping interval */
 582                     dcl->gui_timer_interval = 500;
 583                     dcl->idle = 1;
 584                 }
 585             }
 586             break;
 587         default:
 588             break;
 589         }
 590     }
 591 }
 592
 593 static void sdl_fill(DisplayState *ds, int x, int y, int w, int h, uint32_t c)
 594 {
 595     SDL_Rect dst = { x, y, w, h };
 596     SDL_FillRect(real_screen, &dst, c);
 597 }
 598
 599 static void sdl_mouse_warp(int x, int y, int on)
 600 {
 601     if (on) {
 602         if (!guest_cursor)
 603             sdl_show_cursor();
 604         if (gui_grab || kbd_mouse_is_absolute() || absolute_enabled) {
 605             SDL_SetCursor(guest_sprite);
 606             if (!kbd_mouse_is_absolute() && !absolute_enabled)
 607                 SDL_WarpMouse(x, y);
 608         }
 609     } else if (gui_grab)
 610         sdl_hide_cursor();
 611     guest_cursor = on;
 612     guest_x = x, guest_y = y;
 613 }
 614
 615 static void sdl_mouse_define(int width, int height, int bpp,
 616                              int hot_x, int hot_y,
 617                              uint8_t *image, uint8_t *mask)
 618 {
 619     uint8_t sprite[256], *line;
 620     int x, y, dst, bypl, src = 0;
 621     if (guest_sprite)
 622         SDL_FreeCursor(guest_sprite);
 623
 624     memset(sprite, 0, 256);
 625     bypl = ((width * bpp + 31) >> 5) << 2;
 626     for (y = 0, dst = 0; y < height; y ++, image += bypl) {
 627         line = image;
 628         for (x = 0; x < width; x ++, dst ++) {
 629             switch (bpp) {
 630             case 24:
 631                 src = *(line ++); src |= *(line ++); src |= *(line ++);
 632                 break;
 633             case 16:
 634             case 15:
 635                 src = *(line ++); src |= *(line ++);
 636                 break;
 637             case 8:
 638                 src = *(line ++);
 639                 break;
 640             case 4:
 641                 src = 0xf & (line[x >> 1] >> ((x & 1)) << 2);
 642                 break;
 643             case 2:
 644                 src = 3 & (line[x >> 2] >> ((x & 3)) << 1);
 645                 break;
 646             case 1:
 647                 src = 1 & (line[x >> 3] >> (x & 7));
 648                 break;
 649             }
 650             if (!src)
 651                 sprite[dst >> 3] |= (1 << (~dst & 7)) & mask[dst >> 3];
 652         }
 653     }
 654     guest_sprite = SDL_CreateCursor(sprite, mask, width, height, hot_x, hot_y);
 655
 656     if (guest_cursor &&
 657             (gui_grab || kbd_mouse_is_absolute() || absolute_enabled))
 658         SDL_SetCursor(guest_sprite);
 659 }
 660
 661 static void sdl_cleanup(void)
 662 {
 663     if (guest_sprite)
 664         SDL_FreeCursor(guest_sprite);
 665     SDL_Quit();
 666 }
 667
 668 void sdl_display_init(DisplayState *ds, int full_screen, int no_frame)
 669 {
 670     int flags;
 671     uint8_t data = 0;
 672
 673 #if defined(__APPLE__)
 674     /* always use generic keymaps */
 675     if (!keyboard_layout)
 676         keyboard_layout = "en-us";
 677 #endif
 678     if(keyboard_layout) {
 679         kbd_layout = init_keyboard_layout(name2keysym, keyboard_layout);
 680         if (!kbd_layout)
 681             exit(1);
 682     }
 683
 684     if (no_frame)
 685         gui_noframe = 1;
 686
 687     flags = SDL_INIT_VIDEO | SDL_INIT_NOPARACHUTE;
 688     if (SDL_Init (flags)) {
 689         fprintf(stderr, "Could not initialize SDL - exiting\n");
 690         exit(1);
 691     }
 692
 693     dcl = qemu_mallocz(sizeof(DisplayChangeListener));
 694     dcl->dpy_update = sdl_update;
 695     dcl->dpy_resize = sdl_resize;
 696     dcl->dpy_refresh = sdl_refresh;
 697     dcl->dpy_setdata = sdl_setdata;
 698     dcl->dpy_fill = sdl_fill;
 699     ds->mouse_set = sdl_mouse_warp;
 700     ds->cursor_define = sdl_mouse_define;
 701     register_displaychangelistener(ds, dcl);
 702
 703     sdl_update_caption();
 704     SDL_EnableKeyRepeat(250, 50);
 705     gui_grab = 0;
 706
 707     sdl_cursor_hidden = SDL_CreateCursor(&data, &data, 8, 1, 0, 0);
 708     sdl_cursor_normal = SDL_GetCursor();
 709
 710     atexit(sdl_cleanup);
 711     if (full_screen) {
 712         gui_fullscreen = 1;
 713         gui_fullscreen_initial_grab = 1;
 714         sdl_grab_start();
 715     }
 716 }