ui/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
  25 /* Avoid compiler warning because macro is redefined in SDL_syswm.h. */
  26 #undef WIN32_LEAN_AND_MEAN
  27
  28 #include <SDL.h>
  29 #include <SDL_syswm.h>
  30
  31 #ifndef _WIN32
  32 #include <signal.h>
  33 #endif
  34
  35 #include "qemu-common.h"
  36 #include "console.h"
  37 #include "sysemu.h"
  38 #include "x_keymap.h"
  39 #include "sdl_zoom.h"
  40
  41 static DisplayChangeListener *dcl;
  42 static SDL_Surface *real_screen;
  43 static SDL_Surface *guest_screen = NULL;
  44 static int gui_grab; /* if true, all keyboard/mouse events are grabbed */
  45 static int last_vm_running;
  46 static int gui_saved_grab;
  47 static int gui_fullscreen;
  48 static int gui_noframe;
  49 static int gui_key_modifier_pressed;
  50 static int gui_keysym;
  51 static int gui_fullscreen_initial_grab;
  52 static int gui_grab_code = KMOD_LALT | KMOD_LCTRL;
  53 static uint8_t modifiers_state[256];
  54 static int width, height;
  55 static SDL_Cursor *sdl_cursor_normal;
  56 static SDL_Cursor *sdl_cursor_hidden;
  57 static int absolute_enabled = 0;
  58 static int guest_cursor = 0;
  59 static int guest_x, guest_y;
  60 static SDL_Cursor *guest_sprite = NULL;
  61 static uint8_t allocator;
  62 static SDL_PixelFormat host_format;
  63 static int scaling_active = 0;
  64 static Notifier mouse_mode_notifier;
  65
  66 static void sdl_update(DisplayState *ds, int x, int y, int w, int h)
  67 {
  68     //    printf("updating x=%d y=%d w=%d h=%d\n", x, y, w, h);
  69     SDL_Rect rec;
  70     rec.x = x;
  71     rec.y = y;
  72     rec.w = w;
  73     rec.h = h;
  74
  75     if (guest_screen) {
  76         if (!scaling_active) {
  77             SDL_BlitSurface(guest_screen, &rec, real_screen, &rec);
  78         } else {
  79             if (sdl_zoom_blit(guest_screen, real_screen, SMOOTHING_ON, &rec) < 0) {
  80                 fprintf(stderr, "Zoom blit failed\n");
  81                 exit(1);
  82             }
  83         }
  84     }
  85     SDL_UpdateRect(real_screen, rec.x, rec.y, rec.w, rec.h);
  86 }
  87
  88 static void sdl_setdata(DisplayState *ds)
  89 {
  90     if (guest_screen != NULL) SDL_FreeSurface(guest_screen);
  91
  92     guest_screen = SDL_CreateRGBSurfaceFrom(ds_get_data(ds), ds_get_width(ds), ds_get_height(ds),
  93                                             ds_get_bits_per_pixel(ds), ds_get_linesize(ds),
  94                                             ds->surface->pf.rmask, ds->surface->pf.gmask,
  95                                             ds->surface->pf.bmask, ds->surface->pf.amask);
  96 }
  97
  98 static void do_sdl_resize(int new_width, int new_height, int bpp)
  99 {
 100     int flags;
 101
 102     //    printf("resizing to %d %d\n", w, h);
 103
 104     flags = SDL_HWSURFACE|SDL_ASYNCBLIT|SDL_HWACCEL|SDL_RESIZABLE;
 105     if (gui_fullscreen)
 106         flags |= SDL_FULLSCREEN;
 107     if (gui_noframe)
 108         flags |= SDL_NOFRAME;
 109
 110     width = new_width;
 111     height = new_height;
 112     real_screen = SDL_SetVideoMode(width, height, bpp, flags);
 113     if (!real_screen) {
 114         fprintf(stderr, "Could not open SDL display (%dx%dx%d): %s\n", width,
 115                 height, bpp, SDL_GetError());
 116         exit(1);
 117     }
 118 }
 119
 120 static void sdl_resize(DisplayState *ds)
 121 {
 122     if  (!allocator) {
 123         if (!scaling_active)
 124             do_sdl_resize(ds_get_width(ds), ds_get_height(ds), 0);
 125         else if (real_screen->format->BitsPerPixel != ds_get_bits_per_pixel(ds))
 126             do_sdl_resize(real_screen->w, real_screen->h, ds_get_bits_per_pixel(ds));
 127         sdl_setdata(ds);
 128     } else {
 129         if (guest_screen != NULL) {
 130             SDL_FreeSurface(guest_screen);
 131             guest_screen = NULL;
 132         }
 133     }
 134 }
 135
 136 static PixelFormat sdl_to_qemu_pixelformat(SDL_PixelFormat *sdl_pf)
 137 {
 138     PixelFormat qemu_pf;
 139
 140     memset(&qemu_pf, 0x00, sizeof(PixelFormat));
 141
 142     qemu_pf.bits_per_pixel = sdl_pf->BitsPerPixel;
 143     qemu_pf.bytes_per_pixel = sdl_pf->BytesPerPixel;
 144     qemu_pf.depth = (qemu_pf.bits_per_pixel) == 32 ? 24 : (qemu_pf.bits_per_pixel);
 145
 146     qemu_pf.rmask = sdl_pf->Rmask;
 147     qemu_pf.gmask = sdl_pf->Gmask;
 148     qemu_pf.bmask = sdl_pf->Bmask;
 149     qemu_pf.amask = sdl_pf->Amask;
 150
 151     qemu_pf.rshift = sdl_pf->Rshift;
 152     qemu_pf.gshift = sdl_pf->Gshift;
 153     qemu_pf.bshift = sdl_pf->Bshift;
 154     qemu_pf.ashift = sdl_pf->Ashift;
 155
 156     qemu_pf.rbits = 8 - sdl_pf->Rloss;
 157     qemu_pf.gbits = 8 - sdl_pf->Gloss;
 158     qemu_pf.bbits = 8 - sdl_pf->Bloss;
 159     qemu_pf.abits = 8 - sdl_pf->Aloss;
 160
 161     qemu_pf.rmax = ((1 << qemu_pf.rbits) - 1);
 162     qemu_pf.gmax = ((1 << qemu_pf.gbits) - 1);
 163     qemu_pf.bmax = ((1 << qemu_pf.bbits) - 1);
 164     qemu_pf.amax = ((1 << qemu_pf.abits) - 1);
 165
 166     return qemu_pf;
 167 }
 168
 169 static DisplaySurface* sdl_create_displaysurface(int width, int height)
 170 {
 171     DisplaySurface *surface = (DisplaySurface*) qemu_mallocz(sizeof(DisplaySurface));
 172     if (surface == NULL) {
 173         fprintf(stderr, "sdl_create_displaysurface: malloc failed\n");
 174         exit(1);
 175     }
 176
 177     surface->width = width;
 178     surface->height = height;
 179
 180     if (scaling_active) {
 181         int linesize;
 182         PixelFormat pf;
 183         if (host_format.BytesPerPixel != 2 && host_format.BytesPerPixel != 4) {
 184             linesize = width * 4;
 185             pf = qemu_default_pixelformat(32);
 186         } else {
 187             linesize = width * host_format.BytesPerPixel;
 188             pf = sdl_to_qemu_pixelformat(&host_format);
 189         }
 190         qemu_alloc_display(surface, width, height, linesize, pf, 0);
 191         return surface;
 192     }
 193
 194     if (host_format.BitsPerPixel == 16)
 195         do_sdl_resize(width, height, 16);
 196     else
 197         do_sdl_resize(width, height, 32);
 198
 199     surface->pf = sdl_to_qemu_pixelformat(real_screen->format);
 200     surface->linesize = real_screen->pitch;
 201     surface->data = real_screen->pixels;
 202
 203 #ifdef HOST_WORDS_BIGENDIAN
 204     surface->flags = QEMU_REALPIXELS_FLAG | QEMU_BIG_ENDIAN_FLAG;
 205 #else
 206     surface->flags = QEMU_REALPIXELS_FLAG;
 207 #endif
 208     allocator = 1;
 209
 210     return surface;
 211 }
 212
 213 static void sdl_free_displaysurface(DisplaySurface *surface)
 214 {
 215     allocator = 0;
 216     if (surface == NULL)
 217         return;
 218
 219     if (surface->flags & QEMU_ALLOCATED_FLAG)
 220         qemu_free(surface->data);
 221     qemu_free(surface);
 222 }
 223
 224 static DisplaySurface* sdl_resize_displaysurface(DisplaySurface *surface, int width, int height)
 225 {
 226     sdl_free_displaysurface(surface);
 227     return sdl_create_displaysurface(width, height);
 228 }
 229
 230 /* generic keyboard conversion */
 231
 232 #include "sdl_keysym.h"
 233
 234 static kbd_layout_t *kbd_layout = NULL;
 235
 236 static uint8_t sdl_keyevent_to_keycode_generic(const SDL_KeyboardEvent *ev)
 237 {
 238     int keysym;
 239     /* workaround for X11+SDL bug with AltGR */
 240     keysym = ev->keysym.sym;
 241     if (keysym == 0 && ev->keysym.scancode == 113)
 242         keysym = SDLK_MODE;
 243     /* For Japanese key '\' and '|' */
 244     if (keysym == 92 && ev->keysym.scancode == 133) {
 245         keysym = 0xa5;
 246     }
 247     return keysym2scancode(kbd_layout, keysym) & SCANCODE_KEYMASK;
 248 }
 249
 250 /* specific keyboard conversions from scan codes */
 251
 252 #if defined(_WIN32)
 253
 254 static uint8_t sdl_keyevent_to_keycode(const SDL_KeyboardEvent *ev)
 255 {
 256     return ev->keysym.scancode;
 257 }
 258
 259 #else
 260
 261 #if defined(SDL_VIDEO_DRIVER_X11)
 262 #include <X11/XKBlib.h>
 263
 264 static int check_for_evdev(void)
 265 {
 266     SDL_SysWMinfo info;
 267     XkbDescPtr desc = NULL;
 268     int has_evdev = 0;
 269     char *keycodes = NULL;
 270
 271     SDL_VERSION(&info.version);
 272     if (!SDL_GetWMInfo(&info)) {
 273         return 0;
 274     }
 275     desc = XkbGetKeyboard(info.info.x11.display,
 276                           XkbGBN_AllComponentsMask,
 277                           XkbUseCoreKbd);
 278     if (desc && desc->names) {
 279         keycodes = XGetAtomName(info.info.x11.display, desc->names->keycodes);
 280         if (keycodes == NULL) {
 281             fprintf(stderr, "could not lookup keycode name\n");
 282         } else if (strstart(keycodes, "evdev", NULL)) {
 283             has_evdev = 1;
 284         } else if (!strstart(keycodes, "xfree86", NULL)) {
 285             fprintf(stderr, "unknown keycodes `%s', please report to "
 286                     "qemu-devel@nongnu.org\n", keycodes);
 287         }
 288     }
 289
 290     if (desc) {
 291         XkbFreeKeyboard(desc, XkbGBN_AllComponentsMask, True);
 292     }
 293     if (keycodes) {
 294         XFree(keycodes);
 295     }
 296     return has_evdev;
 297 }
 298 #else
 299 static int check_for_evdev(void)
 300 {
 301         return 0;
 302 }
 303 #endif
 304
 305 static uint8_t sdl_keyevent_to_keycode(const SDL_KeyboardEvent *ev)
 306 {
 307     int keycode;
 308     static int has_evdev = -1;
 309
 310     if (has_evdev == -1)
 311         has_evdev = check_for_evdev();
 312
 313     keycode = ev->keysym.scancode;
 314
 315     if (keycode < 9) {
 316         keycode = 0;
 317     } else if (keycode < 97) {
 318         keycode -= 8; /* just an offset */
 319     } else if (keycode < 158) {
 320         /* use conversion table */
 321         if (has_evdev)
 322             keycode = translate_evdev_keycode(keycode - 97);
 323         else
 324             keycode = translate_xfree86_keycode(keycode - 97);
 325     } else if (keycode == 208) { /* Hiragana_Katakana */
 326         keycode = 0x70;
 327     } else if (keycode == 211) { /* backslash */
 328         keycode = 0x73;
 329     } else {
 330         keycode = 0;
 331     }
 332     return keycode;
 333 }
 334
 335 #endif
 336
 337 static void reset_keys(void)
 338 {
 339     int i;
 340     for(i = 0; i < 256; i++) {
 341         if (modifiers_state[i]) {
 342             if (i & SCANCODE_GREY)
 343                 kbd_put_keycode(SCANCODE_EMUL0);
 344             kbd_put_keycode(i | SCANCODE_UP);
 345             modifiers_state[i] = 0;
 346         }
 347     }
 348 }
 349
 350 static void sdl_process_key(SDL_KeyboardEvent *ev)
 351 {
 352     int keycode, v;
 353
 354     if (ev->keysym.sym == SDLK_PAUSE) {
 355         /* specific case */
 356         v = 0;
 357         if (ev->type == SDL_KEYUP)
 358             v |= SCANCODE_UP;
 359         kbd_put_keycode(0xe1);
 360         kbd_put_keycode(0x1d | v);
 361         kbd_put_keycode(0x45 | v);
 362         return;
 363     }
 364
 365     if (kbd_layout) {
 366         keycode = sdl_keyevent_to_keycode_generic(ev);
 367     } else {
 368         keycode = sdl_keyevent_to_keycode(ev);
 369     }
 370
 371     switch(keycode) {
 372     case 0x00:
 373         /* sent when leaving window: reset the modifiers state */
 374         reset_keys();
 375         return;
 376     case 0x2a:                          /* Left Shift */
 377     case 0x36:                          /* Right Shift */
 378     case 0x1d:                          /* Left CTRL */
 379     case 0x9d:                          /* Right CTRL */
 380     case 0x38:                          /* Left ALT */
 381     case 0xb8:                         /* Right ALT */
 382         if (ev->type == SDL_KEYUP)
 383             modifiers_state[keycode] = 0;
 384         else
 385             modifiers_state[keycode] = 1;
 386         break;
 387 #define QEMU_SDL_VERSION ((SDL_MAJOR_VERSION << 8) + SDL_MINOR_VERSION)
 388 #if QEMU_SDL_VERSION < 0x102 || QEMU_SDL_VERSION == 0x102 && SDL_PATCHLEVEL < 14
 389         /* SDL versions before 1.2.14 don't support key up for caps/num lock. */
 390     case 0x45: /* num lock */
 391     case 0x3a: /* caps lock */
 392         /* SDL does not send the key up event, so we generate it */
 393         kbd_put_keycode(keycode);
 394         kbd_put_keycode(keycode | SCANCODE_UP);
 395         return;
 396 #endif
 397     }
 398
 399     /* now send the key code */
 400     if (keycode & SCANCODE_GREY)
 401         kbd_put_keycode(SCANCODE_EMUL0);
 402     if (ev->type == SDL_KEYUP)
 403         kbd_put_keycode(keycode | SCANCODE_UP);
 404     else
 405         kbd_put_keycode(keycode & SCANCODE_KEYCODEMASK);
 406 }
 407
 408 static void sdl_update_caption(void)
 409 {
 410     char win_title[1024];
 411     char icon_title[1024];
 412     const char *status = "";
 413
 414     if (!vm_running)
 415         status = " [Stopped]";
 416     else if (gui_grab) {
 417         if (alt_grab)
 418             status = " - Press Ctrl-Alt-Shift to exit mouse grab";
 419         else if (ctrl_grab)
 420             status = " - Press Right-Ctrl to exit mouse grab";
 421         else
 422             status = " - Press Ctrl-Alt to exit mouse grab";
 423     }
 424
 425     if (qemu_name) {
 426         snprintf(win_title, sizeof(win_title), "QEMU (%s)%s", qemu_name, status);
 427         snprintf(icon_title, sizeof(icon_title), "QEMU (%s)", qemu_name);
 428     } else {
 429         snprintf(win_title, sizeof(win_title), "QEMU%s", status);
 430         snprintf(icon_title, sizeof(icon_title), "QEMU");
 431     }
 432
 433     SDL_WM_SetCaption(win_title, icon_title);
 434 }
 435
 436 static void sdl_hide_cursor(void)
 437 {
 438     if (!cursor_hide)
 439         return;
 440
 441     if (kbd_mouse_is_absolute()) {
 442         SDL_ShowCursor(1);
 443         SDL_SetCursor(sdl_cursor_hidden);
 444     } else {
 445         SDL_ShowCursor(0);
 446     }
 447 }
 448
 449 static void sdl_show_cursor(void)
 450 {
 451     if (!cursor_hide)
 452         return;
 453
 454     if (!kbd_mouse_is_absolute()) {
 455         SDL_ShowCursor(1);
 456         if (guest_cursor &&
 457                 (gui_grab || kbd_mouse_is_absolute() || absolute_enabled))
 458             SDL_SetCursor(guest_sprite);
 459         else
 460             SDL_SetCursor(sdl_cursor_normal);
 461     }
 462 }
 463
 464 static void sdl_grab_start(void)
 465 {
 466     if (guest_cursor) {
 467         SDL_SetCursor(guest_sprite);
 468         if (!kbd_mouse_is_absolute() && !absolute_enabled)
 469             SDL_WarpMouse(guest_x, guest_y);
 470     } else
 471         sdl_hide_cursor();
 472
 473     if (SDL_WM_GrabInput(SDL_GRAB_ON) == SDL_GRAB_ON) {
 474         gui_grab = 1;
 475         sdl_update_caption();
 476     } else
 477         sdl_show_cursor();
 478 }
 479
 480 static void sdl_grab_end(void)
 481 {
 482     SDL_WM_GrabInput(SDL_GRAB_OFF);
 483     gui_grab = 0;
 484     sdl_show_cursor();
 485     sdl_update_caption();
 486 }
 487
 488 static void sdl_mouse_mode_change(Notifier *notify)
 489 {
 490     if (kbd_mouse_is_absolute()) {
 491         if (!absolute_enabled) {
 492             sdl_hide_cursor();
 493             if (gui_grab) {
 494                 sdl_grab_end();
 495             }
 496             absolute_enabled = 1;
 497         }
 498     } else if (absolute_enabled) {
 499         sdl_show_cursor();
 500         absolute_enabled = 0;
 501     }
 502 }
 503
 504 static void sdl_send_mouse_event(int dx, int dy, int dz, int x, int y, int state)
 505 {
 506     int buttons;
 507     buttons = 0;
 508     if (state & SDL_BUTTON(SDL_BUTTON_LEFT))
 509         buttons |= MOUSE_EVENT_LBUTTON;
 510     if (state & SDL_BUTTON(SDL_BUTTON_RIGHT))
 511         buttons |= MOUSE_EVENT_RBUTTON;
 512     if (state & SDL_BUTTON(SDL_BUTTON_MIDDLE))
 513         buttons |= MOUSE_EVENT_MBUTTON;
 514
 515     if (kbd_mouse_is_absolute()) {
 516        dx = x * 0x7FFF / (width - 1);
 517        dy = y * 0x7FFF / (height - 1);
 518     } else if (guest_cursor) {
 519         x -= guest_x;
 520         y -= guest_y;
 521         guest_x += x;
 522         guest_y += y;
 523         dx = x;
 524         dy = y;
 525     }
 526
 527     kbd_mouse_event(dx, dy, dz, buttons);
 528 }
 529
 530 static void toggle_full_screen(DisplayState *ds)
 531 {
 532     gui_fullscreen = !gui_fullscreen;
 533     do_sdl_resize(real_screen->w, real_screen->h, real_screen->format->BitsPerPixel);
 534     if (gui_fullscreen) {
 535         scaling_active = 0;
 536         gui_saved_grab = gui_grab;
 537         sdl_grab_start();
 538     } else {
 539         if (!gui_saved_grab)
 540             sdl_grab_end();
 541     }
 542     vga_hw_invalidate();
 543     vga_hw_update();
 544 }
 545
 546 static void sdl_refresh(DisplayState *ds)
 547 {
 548     SDL_Event ev1, *ev = &ev1;
 549     int mod_state;
 550     int buttonstate = SDL_GetMouseState(NULL, NULL);
 551
 552     if (last_vm_running != vm_running) {
 553         last_vm_running = vm_running;
 554         sdl_update_caption();
 555     }
 556
 557     vga_hw_update();
 558     SDL_EnableUNICODE(!is_graphic_console());
 559
 560     while (SDL_PollEvent(ev)) {
 561         switch (ev->type) {
 562         case SDL_VIDEOEXPOSE:
 563             sdl_update(ds, 0, 0, real_screen->w, real_screen->h);
 564             break;
 565         case SDL_KEYDOWN:
 566         case SDL_KEYUP:
 567             if (ev->type == SDL_KEYDOWN) {
 568                 if (alt_grab) {
 569                     mod_state = (SDL_GetModState() & (gui_grab_code | KMOD_LSHIFT)) ==
 570                                 (gui_grab_code | KMOD_LSHIFT);
 571                 } else if (ctrl_grab) {
 572                     mod_state = (SDL_GetModState() & KMOD_RCTRL) == KMOD_RCTRL;
 573                 } else {
 574                     mod_state = (SDL_GetModState() & gui_grab_code) ==
 575                                 gui_grab_code;
 576                 }
 577                 gui_key_modifier_pressed = mod_state;
 578                 if (gui_key_modifier_pressed) {
 579                     int keycode;
 580                     keycode = sdl_keyevent_to_keycode(&ev->key);
 581                     switch(keycode) {
 582                     case 0x21: /* 'f' key on US keyboard */
 583                         toggle_full_screen(ds);
 584                         gui_keysym = 1;
 585                         break;
 586                     case 0x16: /* 'u' key on US keyboard */
 587                         scaling_active = 0;
 588                         sdl_resize(ds);
 589                         vga_hw_invalidate();
 590                         vga_hw_update();
 591                         break;
 592                     case 0x02 ... 0x0a: /* '1' to '9' keys */
 593                         /* Reset the modifiers sent to the current console */
 594                         reset_keys();
 595                         console_select(keycode - 0x02);
 596                         if (!is_graphic_console()) {
 597                             /* display grab if going to a text console */
 598                             if (gui_grab)
 599                                 sdl_grab_end();
 600                         }
 601                         gui_keysym = 1;
 602                         break;
 603                     default:
 604                         break;
 605                     }
 606                 } else if (!is_graphic_console()) {
 607                     int keysym;
 608                     keysym = 0;
 609                     if (ev->key.keysym.mod & (KMOD_LCTRL | KMOD_RCTRL)) {
 610                         switch(ev->key.keysym.sym) {
 611                         case SDLK_UP: keysym = QEMU_KEY_CTRL_UP; break;
 612                         case SDLK_DOWN: keysym = QEMU_KEY_CTRL_DOWN; break;
 613                         case SDLK_LEFT: keysym = QEMU_KEY_CTRL_LEFT; break;
 614                         case SDLK_RIGHT: keysym = QEMU_KEY_CTRL_RIGHT; break;
 615                         case SDLK_HOME: keysym = QEMU_KEY_CTRL_HOME; break;
 616                         case SDLK_END: keysym = QEMU_KEY_CTRL_END; break;
 617                         case SDLK_PAGEUP: keysym = QEMU_KEY_CTRL_PAGEUP; break;
 618                         case SDLK_PAGEDOWN: keysym = QEMU_KEY_CTRL_PAGEDOWN; break;
 619                         default: break;
 620                         }
 621                     } else {
 622                         switch(ev->key.keysym.sym) {
 623                         case SDLK_UP: keysym = QEMU_KEY_UP; break;
 624                         case SDLK_DOWN: keysym = QEMU_KEY_DOWN; break;
 625                         case SDLK_LEFT: keysym = QEMU_KEY_LEFT; break;
 626                         case SDLK_RIGHT: keysym = QEMU_KEY_RIGHT; break;
 627                         case SDLK_HOME: keysym = QEMU_KEY_HOME; break;
 628                         case SDLK_END: keysym = QEMU_KEY_END; break;
 629                         case SDLK_PAGEUP: keysym = QEMU_KEY_PAGEUP; break;
 630                         case SDLK_PAGEDOWN: keysym = QEMU_KEY_PAGEDOWN; break;
 631                         case SDLK_BACKSPACE: keysym = QEMU_KEY_BACKSPACE; break;
 632                         case SDLK_DELETE: keysym = QEMU_KEY_DELETE; break;
 633                         default: break;
 634                         }
 635                     }
 636                     if (keysym) {
 637                         kbd_put_keysym(keysym);
 638                     } else if (ev->key.keysym.unicode != 0) {
 639                         kbd_put_keysym(ev->key.keysym.unicode);
 640                     }
 641                 }
 642             } else if (ev->type == SDL_KEYUP) {
 643                 if (!alt_grab) {
 644                     mod_state = (ev->key.keysym.mod & gui_grab_code);
 645                 } else {
 646                     mod_state = (ev->key.keysym.mod &
 647                                  (gui_grab_code | KMOD_LSHIFT));
 648                 }
 649                 if (!mod_state) {
 650                     if (gui_key_modifier_pressed) {
 651                         gui_key_modifier_pressed = 0;
 652                         if (gui_keysym == 0) {
 653                             /* exit/enter grab if pressing Ctrl-Alt */
 654                             if (!gui_grab) {
 655                                 /* if the application is not active,
 656                                    do not try to enter grab state. It
 657                                    prevents
 658                                    'SDL_WM_GrabInput(SDL_GRAB_ON)'
 659                                    from blocking all the application
 660                                    (SDL bug). */
 661                                 if (SDL_GetAppState() & SDL_APPACTIVE)
 662                                     sdl_grab_start();
 663                             } else {
 664                                 sdl_grab_end();
 665                             }
 666                             /* SDL does not send back all the
 667                                modifiers key, so we must correct it */
 668                             reset_keys();
 669                             break;
 670                         }
 671                         gui_keysym = 0;
 672                     }
 673                 }
 674             }
 675             if (is_graphic_console() && !gui_keysym)
 676                 sdl_process_key(&ev->key);
 677             break;
 678         case SDL_QUIT:
 679             if (!no_quit)
 680                 qemu_system_shutdown_request();
 681             break;
 682         case SDL_MOUSEMOTION:
 683             if (gui_grab || kbd_mouse_is_absolute() ||
 684                 absolute_enabled) {
 685                 sdl_send_mouse_event(ev->motion.xrel, ev->motion.yrel, 0,
 686                        ev->motion.x, ev->motion.y, ev->motion.state);
 687             }
 688             break;
 689         case SDL_MOUSEBUTTONDOWN:
 690         case SDL_MOUSEBUTTONUP:
 691             {
 692                 SDL_MouseButtonEvent *bev = &ev->button;
 693                 if (!gui_grab && !kbd_mouse_is_absolute()) {
 694                     if (ev->type == SDL_MOUSEBUTTONDOWN &&
 695                         (bev->button == SDL_BUTTON_LEFT)) {
 696                         /* start grabbing all events */
 697                         sdl_grab_start();
 698                     }
 699                 } else {
 700                     int dz;
 701                     dz = 0;
 702                     if (ev->type == SDL_MOUSEBUTTONDOWN) {
 703                         buttonstate |= SDL_BUTTON(bev->button);
 704                     } else {
 705                         buttonstate &= ~SDL_BUTTON(bev->button);
 706                     }
 707 #ifdef SDL_BUTTON_WHEELUP
 708                     if (bev->button == SDL_BUTTON_WHEELUP && ev->type == SDL_MOUSEBUTTONDOWN) {
 709                         dz = -1;
 710                     } else if (bev->button == SDL_BUTTON_WHEELDOWN && ev->type == SDL_MOUSEBUTTONDOWN) {
 711                         dz = 1;
 712                     }
 713 #endif
 714                     sdl_send_mouse_event(0, 0, dz, bev->x, bev->y, buttonstate);
 715                 }
 716             }
 717             break;
 718         case SDL_ACTIVEEVENT:
 719             if (gui_grab && ev->active.state == SDL_APPINPUTFOCUS &&
 720                 !ev->active.gain && !gui_fullscreen_initial_grab) {
 721                 sdl_grab_end();
 722             }
 723             if (ev->active.state & SDL_APPACTIVE) {
 724                 if (ev->active.gain) {
 725                     /* Back to default interval */
 726                     dcl->gui_timer_interval = 0;
 727                     dcl->idle = 0;
 728                 } else {
 729                     /* Sleeping interval */
 730                     dcl->gui_timer_interval = 500;
 731                     dcl->idle = 1;
 732                 }
 733             }
 734             break;
 735         case SDL_VIDEORESIZE:
 736         {
 737             SDL_ResizeEvent *rev = &ev->resize;
 738             int bpp = real_screen->format->BitsPerPixel;
 739             if (bpp != 16 && bpp != 32)
 740                 bpp = 32;
 741             do_sdl_resize(rev->w, rev->h, bpp);
 742             scaling_active = 1;
 743             if (!is_buffer_shared(ds->surface)) {
 744                 ds->surface = qemu_resize_displaysurface(ds, ds_get_width(ds), ds_get_height(ds));
 745                 dpy_resize(ds);
 746             }
 747             vga_hw_invalidate();
 748             vga_hw_update();
 749             break;
 750         }
 751         default:
 752             break;
 753         }
 754     }
 755 }
 756
 757 static void sdl_fill(DisplayState *ds, int x, int y, int w, int h, uint32_t c)
 758 {
 759     SDL_Rect dst = { x, y, w, h };
 760     SDL_FillRect(real_screen, &dst, c);
 761 }
 762
 763 static void sdl_mouse_warp(int x, int y, int on)
 764 {
 765     if (on) {
 766         if (!guest_cursor)
 767             sdl_show_cursor();
 768         if (gui_grab || kbd_mouse_is_absolute() || absolute_enabled) {
 769             SDL_SetCursor(guest_sprite);
 770             if (!kbd_mouse_is_absolute() && !absolute_enabled)
 771                 SDL_WarpMouse(x, y);
 772         }
 773     } else if (gui_grab)
 774         sdl_hide_cursor();
 775     guest_cursor = on;
 776     guest_x = x, guest_y = y;
 777 }
 778
 779 static void sdl_mouse_define(QEMUCursor *c)
 780 {
 781     uint8_t *image, *mask;
 782     int bpl;
 783
 784     if (guest_sprite)
 785         SDL_FreeCursor(guest_sprite);
 786
 787     bpl = cursor_get_mono_bpl(c);
 788     image = qemu_mallocz(bpl * c->height);
 789     mask  = qemu_mallocz(bpl * c->height);
 790     cursor_get_mono_image(c, 0x000000, image);
 791     cursor_get_mono_mask(c, 0, mask);
 792     guest_sprite = SDL_CreateCursor(image, mask, c->width, c->height,
 793                                     c->hot_x, c->hot_y);
 794     qemu_free(image);
 795     qemu_free(mask);
 796
 797     if (guest_cursor &&
 798             (gui_grab || kbd_mouse_is_absolute() || absolute_enabled))
 799         SDL_SetCursor(guest_sprite);
 800 }
 801
 802 static void sdl_cleanup(void)
 803 {
 804     if (guest_sprite)
 805         SDL_FreeCursor(guest_sprite);
 806     SDL_QuitSubSystem(SDL_INIT_VIDEO);
 807 }
 808
 809 void sdl_display_init(DisplayState *ds, int full_screen, int no_frame)
 810 {
 811     int flags;
 812     uint8_t data = 0;
 813     DisplayAllocator *da;
 814     const SDL_VideoInfo *vi;
 815     char *filename;
 816
 817 #if defined(__APPLE__)
 818     /* always use generic keymaps */
 819     if (!keyboard_layout)
 820         keyboard_layout = "en-us";
 821 #endif
 822     if(keyboard_layout) {
 823         kbd_layout = init_keyboard_layout(name2keysym, keyboard_layout);
 824         if (!kbd_layout)
 825             exit(1);
 826     }
 827
 828     if (no_frame)
 829         gui_noframe = 1;
 830
 831     if (!full_screen) {
 832         setenv("SDL_VIDEO_ALLOW_SCREENSAVER", "1", 0);
 833     }
 834 #ifdef __linux__
 835     /* on Linux, SDL may use fbcon|directfb|svgalib when run without
 836      * accessible $DISPLAY to open X11 window.  This is often the case
 837      * when qemu is run using sudo.  But in this case, and when actually
 838      * run in X11 environment, SDL fights with X11 for the video card,
 839      * making current display unavailable, often until reboot.
 840      * So make x11 the default SDL video driver if this variable is unset.
 841      * This is a bit hackish but saves us from bigger problem.
 842      * Maybe it's a good idea to fix this in SDL instead.
 843      */
 844     setenv("SDL_VIDEODRIVER", "x11", 0);
 845 #endif
 846
 847     /* Enable normal up/down events for Caps-Lock and Num-Lock keys.
 848      * This requires SDL >= 1.2.14. */
 849     setenv("SDL_DISABLE_LOCK_KEYS", "1", 1);
 850
 851     flags = SDL_INIT_VIDEO | SDL_INIT_NOPARACHUTE;
 852     if (SDL_Init (flags)) {
 853         fprintf(stderr, "Could not initialize SDL(%s) - exiting\n",
 854                 SDL_GetError());
 855         exit(1);
 856     }
 857     vi = SDL_GetVideoInfo();
 858     host_format = *(vi->vfmt);
 859
 860     /* Load a 32x32x4 image. White pixels are transparent. */
 861     filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, "qemu-icon.bmp");
 862     if (filename) {
 863         SDL_Surface *image = SDL_LoadBMP(filename);
 864         if (image) {
 865             uint32_t colorkey = SDL_MapRGB(image->format, 255, 255, 255);
 866             SDL_SetColorKey(image, SDL_SRCCOLORKEY, colorkey);
 867             SDL_WM_SetIcon(image, NULL);
 868         }
 869         qemu_free(filename);
 870     }
 871
 872     dcl = qemu_mallocz(sizeof(DisplayChangeListener));
 873     dcl->dpy_update = sdl_update;
 874     dcl->dpy_resize = sdl_resize;
 875     dcl->dpy_refresh = sdl_refresh;
 876     dcl->dpy_setdata = sdl_setdata;
 877     dcl->dpy_fill = sdl_fill;
 878     ds->mouse_set = sdl_mouse_warp;
 879     ds->cursor_define = sdl_mouse_define;
 880     register_displaychangelistener(ds, dcl);
 881
 882     da = qemu_mallocz(sizeof(DisplayAllocator));
 883     da->create_displaysurface = sdl_create_displaysurface;
 884     da->resize_displaysurface = sdl_resize_displaysurface;
 885     da->free_displaysurface = sdl_free_displaysurface;
 886     if (register_displayallocator(ds, da) == da) {
 887         dpy_resize(ds);
 888     }
 889
 890     mouse_mode_notifier.notify = sdl_mouse_mode_change;
 891     qemu_add_mouse_mode_change_notifier(&mouse_mode_notifier);
 892
 893     sdl_update_caption();
 894     SDL_EnableKeyRepeat(250, 50);
 895     gui_grab = 0;
 896
 897     sdl_cursor_hidden = SDL_CreateCursor(&data, &data, 8, 1, 0, 0);
 898     sdl_cursor_normal = SDL_GetCursor();
 899
 900     atexit(sdl_cleanup);
 901     if (full_screen) {
 902         gui_fullscreen = 1;
 903         gui_fullscreen_initial_grab = 1;
 904         sdl_grab_start();
 905     }
 906 }