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 #include "qemu-common.h"
  32 #include "console.h"
  33 #include "sysemu.h"
  34 #include "x_keymap.h"
  35 #include "sdl_zoom.h"
  36
  37 static DisplayChangeListener *dcl;
  38 static SDL_Surface *real_screen;
  39 static SDL_Surface *guest_screen = NULL;
  40 static int gui_grab; /* if true, all keyboard/mouse events are grabbed */
  41 static int last_vm_running;
  42 static bool gui_saved_scaling;
  43 static int gui_saved_width;
  44 static int gui_saved_height;
  45 static int gui_saved_grab;
  46 static int gui_fullscreen;
  47 static int gui_noframe;
  48 static int gui_key_modifier_pressed;
  49 static int gui_keysym;
  50 static int gui_grab_code = KMOD_LALT | KMOD_LCTRL;
  51 static uint8_t modifiers_state[256];
  52 static SDL_Cursor *sdl_cursor_normal;
  53 static SDL_Cursor *sdl_cursor_hidden;
  54 static int absolute_enabled = 0;
  55 static int guest_cursor = 0;
  56 static int guest_x, guest_y;
  57 static SDL_Cursor *guest_sprite = NULL;
  58 static uint8_t allocator;
  59 static SDL_PixelFormat host_format;
  60 static int scaling_active = 0;
  61 static Notifier mouse_mode_notifier;
  62
  63 static void sdl_update(DisplayState *ds, int x, int y, int w, int h)
  64 {
  65     //    printf("updating x=%d y=%d w=%d h=%d\n", x, y, w, h);
  66     SDL_Rect rec;
  67     rec.x = x;
  68     rec.y = y;
  69     rec.w = w;
  70     rec.h = h;
  71
  72     if (guest_screen) {
  73         if (!scaling_active) {
  74             SDL_BlitSurface(guest_screen, &rec, real_screen, &rec);
  75         } else {
  76             if (sdl_zoom_blit(guest_screen, real_screen, SMOOTHING_ON, &rec) < 0) {
  77                 fprintf(stderr, "Zoom blit failed\n");
  78                 exit(1);
  79             }
  80         }
  81     }
  82     SDL_UpdateRect(real_screen, rec.x, rec.y, rec.w, rec.h);
  83 }
  84
  85 static void sdl_setdata(DisplayState *ds)
  86 {
  87     if (guest_screen != NULL) SDL_FreeSurface(guest_screen);
  88
  89     guest_screen = SDL_CreateRGBSurfaceFrom(ds_get_data(ds), ds_get_width(ds), ds_get_height(ds),
  90                                             ds_get_bits_per_pixel(ds), ds_get_linesize(ds),
  91                                             ds->surface->pf.rmask, ds->surface->pf.gmask,
  92                                             ds->surface->pf.bmask, ds->surface->pf.amask);
  93 }
  94
  95 static void do_sdl_resize(int width, int height, int bpp)
  96 {
  97     int flags;
  98
  99     //    printf("resizing to %d %d\n", w, h);
 100
 101     flags = SDL_HWSURFACE | SDL_ASYNCBLIT | SDL_HWACCEL;
 102     if (gui_fullscreen) {
 103         flags |= SDL_FULLSCREEN;
 104     } else {
 105         flags |= SDL_RESIZABLE;
 106     }
 107     if (gui_noframe)
 108         flags |= SDL_NOFRAME;
 109
 110     real_screen = SDL_SetVideoMode(width, height, bpp, flags);
 111     if (!real_screen) {
 112         fprintf(stderr, "Could not open SDL display (%dx%dx%d): %s\n", width,
 113                 height, bpp, SDL_GetError());
 114         exit(1);
 115     }
 116 }
 117
 118 static void sdl_resize(DisplayState *ds)
 119 {
 120     if  (!allocator) {
 121         if (!scaling_active)
 122             do_sdl_resize(ds_get_width(ds), ds_get_height(ds), 0);
 123         else if (real_screen->format->BitsPerPixel != ds_get_bits_per_pixel(ds))
 124             do_sdl_resize(real_screen->w, real_screen->h, ds_get_bits_per_pixel(ds));
 125         sdl_setdata(ds);
 126     } else {
 127         if (guest_screen != NULL) {
 128             SDL_FreeSurface(guest_screen);
 129             guest_screen = NULL;
 130         }
 131     }
 132 }
 133
 134 static PixelFormat sdl_to_qemu_pixelformat(SDL_PixelFormat *sdl_pf)
 135 {
 136     PixelFormat qemu_pf;
 137
 138     memset(&qemu_pf, 0x00, sizeof(PixelFormat));
 139
 140     qemu_pf.bits_per_pixel = sdl_pf->BitsPerPixel;
 141     qemu_pf.bytes_per_pixel = sdl_pf->BytesPerPixel;
 142     qemu_pf.depth = (qemu_pf.bits_per_pixel) == 32 ? 24 : (qemu_pf.bits_per_pixel);
 143
 144     qemu_pf.rmask = sdl_pf->Rmask;
 145     qemu_pf.gmask = sdl_pf->Gmask;
 146     qemu_pf.bmask = sdl_pf->Bmask;
 147     qemu_pf.amask = sdl_pf->Amask;
 148
 149     qemu_pf.rshift = sdl_pf->Rshift;
 150     qemu_pf.gshift = sdl_pf->Gshift;
 151     qemu_pf.bshift = sdl_pf->Bshift;
 152     qemu_pf.ashift = sdl_pf->Ashift;
 153
 154     qemu_pf.rbits = 8 - sdl_pf->Rloss;
 155     qemu_pf.gbits = 8 - sdl_pf->Gloss;
 156     qemu_pf.bbits = 8 - sdl_pf->Bloss;
 157     qemu_pf.abits = 8 - sdl_pf->Aloss;
 158
 159     qemu_pf.rmax = ((1 << qemu_pf.rbits) - 1);
 160     qemu_pf.gmax = ((1 << qemu_pf.gbits) - 1);
 161     qemu_pf.bmax = ((1 << qemu_pf.bbits) - 1);
 162     qemu_pf.amax = ((1 << qemu_pf.abits) - 1);
 163
 164     return qemu_pf;
 165 }
 166
 167 static DisplaySurface* sdl_create_displaysurface(int width, int height)
 168 {
 169     DisplaySurface *surface = (DisplaySurface*) g_malloc0(sizeof(DisplaySurface));
 170     if (surface == NULL) {
 171         fprintf(stderr, "sdl_create_displaysurface: malloc failed\n");
 172         exit(1);
 173     }
 174
 175     surface->width = width;
 176     surface->height = height;
 177
 178     if (scaling_active) {
 179         int linesize;
 180         PixelFormat pf;
 181         if (host_format.BytesPerPixel != 2 && host_format.BytesPerPixel != 4) {
 182             linesize = width * 4;
 183             pf = qemu_default_pixelformat(32);
 184         } else {
 185             linesize = width * host_format.BytesPerPixel;
 186             pf = sdl_to_qemu_pixelformat(&host_format);
 187         }
 188         qemu_alloc_display(surface, width, height, linesize, pf, 0);
 189         return surface;
 190     }
 191
 192     if (host_format.BitsPerPixel == 16)
 193         do_sdl_resize(width, height, 16);
 194     else
 195         do_sdl_resize(width, height, 32);
 196
 197     surface->pf = sdl_to_qemu_pixelformat(real_screen->format);
 198     surface->linesize = real_screen->pitch;
 199     surface->data = real_screen->pixels;
 200
 201 #ifdef HOST_WORDS_BIGENDIAN
 202     surface->flags = QEMU_REALPIXELS_FLAG | QEMU_BIG_ENDIAN_FLAG;
 203 #else
 204     surface->flags = QEMU_REALPIXELS_FLAG;
 205 #endif
 206     allocator = 1;
 207
 208     return surface;
 209 }
 210
 211 static void sdl_free_displaysurface(DisplaySurface *surface)
 212 {
 213     allocator = 0;
 214     if (surface == NULL)
 215         return;
 216
 217     if (surface->flags & QEMU_ALLOCATED_FLAG)
 218         g_free(surface->data);
 219     g_free(surface);
 220 }
 221
 222 static DisplaySurface* sdl_resize_displaysurface(DisplaySurface *surface, int width, int height)
 223 {
 224     sdl_free_displaysurface(surface);
 225     return sdl_create_displaysurface(width, height);
 226 }
 227
 228 /* generic keyboard conversion */
 229
 230 #include "sdl_keysym.h"
 231
 232 static kbd_layout_t *kbd_layout = NULL;
 233
 234 static uint8_t sdl_keyevent_to_keycode_generic(const SDL_KeyboardEvent *ev)
 235 {
 236     int keysym;
 237     /* workaround for X11+SDL bug with AltGR */
 238     keysym = ev->keysym.sym;
 239     if (keysym == 0 && ev->keysym.scancode == 113)
 240         keysym = SDLK_MODE;
 241     /* For Japanese key '\' and '|' */
 242     if (keysym == 92 && ev->keysym.scancode == 133) {
 243         keysym = 0xa5;
 244     }
 245     return keysym2scancode(kbd_layout, keysym) & SCANCODE_KEYMASK;
 246 }
 247
 248 /* specific keyboard conversions from scan codes */
 249
 250 #if defined(_WIN32)
 251
 252 static uint8_t sdl_keyevent_to_keycode(const SDL_KeyboardEvent *ev)
 253 {
 254     return ev->keysym.scancode;
 255 }
 256
 257 #else
 258
 259 #if defined(SDL_VIDEO_DRIVER_X11)
 260 #include <X11/XKBlib.h>
 261
 262 static int check_for_evdev(void)
 263 {
 264     SDL_SysWMinfo info;
 265     XkbDescPtr desc = NULL;
 266     int has_evdev = 0;
 267     char *keycodes = NULL;
 268
 269     SDL_VERSION(&info.version);
 270     if (!SDL_GetWMInfo(&info)) {
 271         return 0;
 272     }
 273     desc = XkbGetKeyboard(info.info.x11.display,
 274                           XkbGBN_AllComponentsMask,
 275                           XkbUseCoreKbd);
 276     if (desc && desc->names) {
 277         keycodes = XGetAtomName(info.info.x11.display, desc->names->keycodes);
 278         if (keycodes == NULL) {
 279             fprintf(stderr, "could not lookup keycode name\n");
 280         } else if (strstart(keycodes, "evdev", NULL)) {
 281             has_evdev = 1;
 282         } else if (!strstart(keycodes, "xfree86", NULL)) {
 283             fprintf(stderr, "unknown keycodes `%s', please report to "
 284                     "qemu-devel@nongnu.org\n", keycodes);
 285         }
 286     }
 287
 288     if (desc) {
 289         XkbFreeKeyboard(desc, XkbGBN_AllComponentsMask, True);
 290     }
 291     if (keycodes) {
 292         XFree(keycodes);
 293     }
 294     return has_evdev;
 295 }
 296 #else
 297 static int check_for_evdev(void)
 298 {
 299         return 0;
 300 }
 301 #endif
 302
 303 static uint8_t sdl_keyevent_to_keycode(const SDL_KeyboardEvent *ev)
 304 {
 305     int keycode;
 306     static int has_evdev = -1;
 307
 308     if (has_evdev == -1)
 309         has_evdev = check_for_evdev();
 310
 311     keycode = ev->keysym.scancode;
 312
 313     if (keycode < 9) {
 314         keycode = 0;
 315     } else if (keycode < 97) {
 316         keycode -= 8; /* just an offset */
 317     } else if (keycode < 158) {
 318         /* use conversion table */
 319         if (has_evdev)
 320             keycode = translate_evdev_keycode(keycode - 97);
 321         else
 322             keycode = translate_xfree86_keycode(keycode - 97);
 323     } else if (keycode == 208) { /* Hiragana_Katakana */
 324         keycode = 0x70;
 325     } else if (keycode == 211) { /* backslash */
 326         keycode = 0x73;
 327     } else {
 328         keycode = 0;
 329     }
 330     return keycode;
 331 }
 332
 333 #endif
 334
 335 static void reset_keys(void)
 336 {
 337     int i;
 338     for(i = 0; i < 256; i++) {
 339         if (modifiers_state[i]) {
 340             if (i & SCANCODE_GREY)
 341                 kbd_put_keycode(SCANCODE_EMUL0);
 342             kbd_put_keycode(i | SCANCODE_UP);
 343             modifiers_state[i] = 0;
 344         }
 345     }
 346 }
 347
 348 static void sdl_process_key(SDL_KeyboardEvent *ev)
 349 {
 350     int keycode, v;
 351
 352     if (ev->keysym.sym == SDLK_PAUSE) {
 353         /* specific case */
 354         v = 0;
 355         if (ev->type == SDL_KEYUP)
 356             v |= SCANCODE_UP;
 357         kbd_put_keycode(0xe1);
 358         kbd_put_keycode(0x1d | v);
 359         kbd_put_keycode(0x45 | v);
 360         return;
 361     }
 362
 363     if (kbd_layout) {
 364         keycode = sdl_keyevent_to_keycode_generic(ev);
 365     } else {
 366         keycode = sdl_keyevent_to_keycode(ev);
 367     }
 368
 369     switch(keycode) {
 370     case 0x00:
 371         /* sent when leaving window: reset the modifiers state */
 372         reset_keys();
 373         return;
 374     case 0x2a:                          /* Left Shift */
 375     case 0x36:                          /* Right Shift */
 376     case 0x1d:                          /* Left CTRL */
 377     case 0x9d:                          /* Right CTRL */
 378     case 0x38:                          /* Left ALT */
 379     case 0xb8:                         /* Right ALT */
 380         if (ev->type == SDL_KEYUP)
 381             modifiers_state[keycode] = 0;
 382         else
 383             modifiers_state[keycode] = 1;
 384         break;
 385 #define QEMU_SDL_VERSION ((SDL_MAJOR_VERSION << 8) + SDL_MINOR_VERSION)
 386 #if QEMU_SDL_VERSION < 0x102 || QEMU_SDL_VERSION == 0x102 && SDL_PATCHLEVEL < 14
 387         /* SDL versions before 1.2.14 don't support key up for caps/num lock. */
 388     case 0x45: /* num lock */
 389     case 0x3a: /* caps lock */
 390         /* SDL does not send the key up event, so we generate it */
 391         kbd_put_keycode(keycode);
 392         kbd_put_keycode(keycode | SCANCODE_UP);
 393         return;
 394 #endif
 395     }
 396
 397     /* now send the key code */
 398     if (keycode & SCANCODE_GREY)
 399         kbd_put_keycode(SCANCODE_EMUL0);
 400     if (ev->type == SDL_KEYUP)
 401         kbd_put_keycode(keycode | SCANCODE_UP);
 402     else
 403         kbd_put_keycode(keycode & SCANCODE_KEYCODEMASK);
 404 }
 405
 406 static void sdl_update_caption(void)
 407 {
 408     char win_title[1024];
 409     char icon_title[1024];
 410     const char *status = "";
 411
 412     if (!runstate_is_running())
 413         status = " [Stopped]";
 414     else if (gui_grab) {
 415         if (alt_grab)
 416             status = " - Press Ctrl-Alt-Shift to exit mouse grab";
 417         else if (ctrl_grab)
 418             status = " - Press Right-Ctrl to exit mouse grab";
 419         else
 420             status = " - Press Ctrl-Alt to exit mouse grab";
 421     }
 422
 423     if (qemu_name) {
 424         snprintf(win_title, sizeof(win_title), "QEMU (%s)%s", qemu_name, status);
 425         snprintf(icon_title, sizeof(icon_title), "QEMU (%s)", qemu_name);
 426     } else {
 427         snprintf(win_title, sizeof(win_title), "QEMU%s", status);
 428         snprintf(icon_title, sizeof(icon_title), "QEMU");
 429     }
 430
 431     SDL_WM_SetCaption(win_title, icon_title);
 432 }
 433
 434 static void sdl_hide_cursor(void)
 435 {
 436     if (!cursor_hide)
 437         return;
 438
 439     if (kbd_mouse_is_absolute()) {
 440         SDL_ShowCursor(1);
 441         SDL_SetCursor(sdl_cursor_hidden);
 442     } else {
 443         SDL_ShowCursor(0);
 444     }
 445 }
 446
 447 static void sdl_show_cursor(void)
 448 {
 449     if (!cursor_hide)
 450         return;
 451
 452     if (!kbd_mouse_is_absolute() || !is_graphic_console()) {
 453         SDL_ShowCursor(1);
 454         if (guest_cursor &&
 455                 (gui_grab || kbd_mouse_is_absolute() || absolute_enabled))
 456             SDL_SetCursor(guest_sprite);
 457         else
 458             SDL_SetCursor(sdl_cursor_normal);
 459     }
 460 }
 461
 462 static void sdl_grab_start(void)
 463 {
 464     /*
 465      * If the application is not active, do not try to enter grab state. This
 466      * prevents 'SDL_WM_GrabInput(SDL_GRAB_ON)' from blocking all the
 467      * application (SDL bug).
 468      */
 469     if (!(SDL_GetAppState() & SDL_APPINPUTFOCUS)) {
 470         return;
 471     }
 472     if (guest_cursor) {
 473         SDL_SetCursor(guest_sprite);
 474         if (!kbd_mouse_is_absolute() && !absolute_enabled)
 475             SDL_WarpMouse(guest_x, guest_y);
 476     } else
 477         sdl_hide_cursor();
 478     SDL_WM_GrabInput(SDL_GRAB_ON);
 479     gui_grab = 1;
 480     sdl_update_caption();
 481 }
 482
 483 static void sdl_grab_end(void)
 484 {
 485     SDL_WM_GrabInput(SDL_GRAB_OFF);
 486     gui_grab = 0;
 487     sdl_show_cursor();
 488     sdl_update_caption();
 489 }
 490
 491 static void absolute_mouse_grab(void)
 492 {
 493     int mouse_x, mouse_y;
 494
 495     SDL_GetMouseState(&mouse_x, &mouse_y);
 496     if (mouse_x > 0 && mouse_x < real_screen->w - 1 &&
 497         mouse_y > 0 && mouse_y < real_screen->h - 1) {
 498         sdl_grab_start();
 499     }
 500 }
 501
 502 static void sdl_mouse_mode_change(Notifier *notify, void *data)
 503 {
 504     if (kbd_mouse_is_absolute()) {
 505         if (!absolute_enabled) {
 506             absolute_enabled = 1;
 507             if (is_graphic_console()) {
 508                 absolute_mouse_grab();
 509             }
 510         }
 511     } else if (absolute_enabled) {
 512         if (!gui_fullscreen) {
 513             sdl_grab_end();
 514         }
 515         absolute_enabled = 0;
 516     }
 517 }
 518
 519 static void sdl_send_mouse_event(int dx, int dy, int dz, int x, int y, int state)
 520 {
 521     int buttons = 0;
 522
 523     if (state & SDL_BUTTON(SDL_BUTTON_LEFT)) {
 524         buttons |= MOUSE_EVENT_LBUTTON;
 525     }
 526     if (state & SDL_BUTTON(SDL_BUTTON_RIGHT)) {
 527         buttons |= MOUSE_EVENT_RBUTTON;
 528     }
 529     if (state & SDL_BUTTON(SDL_BUTTON_MIDDLE)) {
 530         buttons |= MOUSE_EVENT_MBUTTON;
 531     }
 532
 533     if (kbd_mouse_is_absolute()) {
 534         dx = x * 0x7FFF / (real_screen->w - 1);
 535         dy = y * 0x7FFF / (real_screen->h - 1);
 536     } else if (guest_cursor) {
 537         x -= guest_x;
 538         y -= guest_y;
 539         guest_x += x;
 540         guest_y += y;
 541         dx = x;
 542         dy = y;
 543     }
 544
 545     kbd_mouse_event(dx, dy, dz, buttons);
 546 }
 547
 548 static void sdl_scale(DisplayState *ds, int width, int height)
 549 {
 550     int bpp = real_screen->format->BitsPerPixel;
 551
 552     if (bpp != 16 && bpp != 32) {
 553         bpp = 32;
 554     }
 555     do_sdl_resize(width, height, bpp);
 556     scaling_active = 1;
 557     if (!is_buffer_shared(ds->surface)) {
 558         ds->surface = qemu_resize_displaysurface(ds, ds_get_width(ds),
 559                                                  ds_get_height(ds));
 560         dpy_resize(ds);
 561     }
 562 }
 563
 564 static void toggle_full_screen(DisplayState *ds)
 565 {
 566     gui_fullscreen = !gui_fullscreen;
 567     if (gui_fullscreen) {
 568         gui_saved_width = real_screen->w;
 569         gui_saved_height = real_screen->h;
 570         gui_saved_scaling = scaling_active;
 571
 572         do_sdl_resize(ds_get_width(ds), ds_get_height(ds),
 573                       ds_get_bits_per_pixel(ds));
 574         scaling_active = 0;
 575
 576         gui_saved_grab = gui_grab;
 577         sdl_grab_start();
 578     } else {
 579         if (gui_saved_scaling) {
 580             sdl_scale(ds, gui_saved_width, gui_saved_height);
 581         } else {
 582             do_sdl_resize(ds_get_width(ds), ds_get_height(ds), 0);
 583         }
 584         if (!gui_saved_grab || !is_graphic_console()) {
 585             sdl_grab_end();
 586         }
 587     }
 588     vga_hw_invalidate();
 589     vga_hw_update();
 590 }
 591
 592 static void handle_keydown(DisplayState *ds, SDL_Event *ev)
 593 {
 594     int mod_state;
 595     int keycode;
 596
 597     if (alt_grab) {
 598         mod_state = (SDL_GetModState() & (gui_grab_code | KMOD_LSHIFT)) ==
 599                     (gui_grab_code | KMOD_LSHIFT);
 600     } else if (ctrl_grab) {
 601         mod_state = (SDL_GetModState() & KMOD_RCTRL) == KMOD_RCTRL;
 602     } else {
 603         mod_state = (SDL_GetModState() & gui_grab_code) == gui_grab_code;
 604     }
 605     gui_key_modifier_pressed = mod_state;
 606
 607     if (gui_key_modifier_pressed) {
 608         keycode = sdl_keyevent_to_keycode(&ev->key);
 609         switch (keycode) {
 610         case 0x21: /* 'f' key on US keyboard */
 611             toggle_full_screen(ds);
 612             gui_keysym = 1;
 613             break;
 614         case 0x16: /* 'u' key on US keyboard */
 615             if (scaling_active) {
 616                 scaling_active = 0;
 617                 sdl_resize(ds);
 618                 vga_hw_invalidate();
 619                 vga_hw_update();
 620             }
 621             gui_keysym = 1;
 622             break;
 623         case 0x02 ... 0x0a: /* '1' to '9' keys */
 624             /* Reset the modifiers sent to the current console */
 625             reset_keys();
 626             console_select(keycode - 0x02);
 627             gui_keysym = 1;
 628             if (gui_fullscreen) {
 629                 break;
 630             }
 631             if (!is_graphic_console()) {
 632                 /* release grab if going to a text console */
 633                 if (gui_grab) {
 634                     sdl_grab_end();
 635                 } else if (absolute_enabled) {
 636                     sdl_show_cursor();
 637                 }
 638             } else if (absolute_enabled) {
 639                 sdl_hide_cursor();
 640                 absolute_mouse_grab();
 641             }
 642             break;
 643         case 0x1b: /* '+' */
 644         case 0x35: /* '-' */
 645             if (!gui_fullscreen) {
 646                 int width = MAX(real_screen->w + (keycode == 0x1b ? 50 : -50),
 647                                 160);
 648                 int height = (ds_get_height(ds) * width) / ds_get_width(ds);
 649
 650                 sdl_scale(ds, width, height);
 651                 vga_hw_invalidate();
 652                 vga_hw_update();
 653                 gui_keysym = 1;
 654             }
 655         default:
 656             break;
 657         }
 658     } else if (!is_graphic_console()) {
 659         int keysym = 0;
 660
 661         if (ev->key.keysym.mod & (KMOD_LCTRL | KMOD_RCTRL)) {
 662             switch (ev->key.keysym.sym) {
 663             case SDLK_UP:
 664                 keysym = QEMU_KEY_CTRL_UP;
 665                 break;
 666             case SDLK_DOWN:
 667                 keysym = QEMU_KEY_CTRL_DOWN;
 668                 break;
 669             case SDLK_LEFT:
 670                 keysym = QEMU_KEY_CTRL_LEFT;
 671                 break;
 672             case SDLK_RIGHT:
 673                 keysym = QEMU_KEY_CTRL_RIGHT;
 674                 break;
 675             case SDLK_HOME:
 676                 keysym = QEMU_KEY_CTRL_HOME;
 677                 break;
 678             case SDLK_END:
 679                 keysym = QEMU_KEY_CTRL_END;
 680                 break;
 681             case SDLK_PAGEUP:
 682                 keysym = QEMU_KEY_CTRL_PAGEUP;
 683                 break;
 684             case SDLK_PAGEDOWN:
 685                 keysym = QEMU_KEY_CTRL_PAGEDOWN;
 686                 break;
 687             default:
 688                 break;
 689             }
 690         } else {
 691             switch (ev->key.keysym.sym) {
 692             case SDLK_UP:
 693                 keysym = QEMU_KEY_UP;
 694                 break;
 695             case SDLK_DOWN:
 696                 keysym = QEMU_KEY_DOWN;
 697                 break;
 698             case SDLK_LEFT:
 699                 keysym = QEMU_KEY_LEFT;
 700                 break;
 701             case SDLK_RIGHT:
 702                 keysym = QEMU_KEY_RIGHT;
 703                 break;
 704             case SDLK_HOME:
 705                 keysym = QEMU_KEY_HOME;
 706                 break;
 707             case SDLK_END:
 708                 keysym = QEMU_KEY_END;
 709                 break;
 710             case SDLK_PAGEUP:
 711                 keysym = QEMU_KEY_PAGEUP;
 712                 break;
 713             case SDLK_PAGEDOWN:
 714                 keysym = QEMU_KEY_PAGEDOWN;
 715                 break;
 716             case SDLK_BACKSPACE:
 717                 keysym = QEMU_KEY_BACKSPACE;
 718                 break;
 719             case SDLK_DELETE:
 720                 keysym = QEMU_KEY_DELETE;
 721                 break;
 722             default:
 723                 break;
 724             }
 725         }
 726         if (keysym) {
 727             kbd_put_keysym(keysym);
 728         } else if (ev->key.keysym.unicode != 0) {
 729             kbd_put_keysym(ev->key.keysym.unicode);
 730         }
 731     }
 732     if (is_graphic_console() && !gui_keysym) {
 733         sdl_process_key(&ev->key);
 734     }
 735 }
 736
 737 static void handle_keyup(DisplayState *ds, SDL_Event *ev)
 738 {
 739     int mod_state;
 740
 741     if (!alt_grab) {
 742         mod_state = (ev->key.keysym.mod & gui_grab_code);
 743     } else {
 744         mod_state = (ev->key.keysym.mod & (gui_grab_code | KMOD_LSHIFT));
 745     }
 746     if (!mod_state && gui_key_modifier_pressed) {
 747         gui_key_modifier_pressed = 0;
 748         if (gui_keysym == 0) {
 749             /* exit/enter grab if pressing Ctrl-Alt */
 750             if (!gui_grab) {
 751                 if (is_graphic_console()) {
 752                     sdl_grab_start();
 753                 }
 754             } else if (!gui_fullscreen) {
 755                 sdl_grab_end();
 756             }
 757             /* SDL does not send back all the modifiers key, so we must
 758              * correct it. */
 759             reset_keys();
 760             return;
 761         }
 762         gui_keysym = 0;
 763     }
 764     if (is_graphic_console() && !gui_keysym) {
 765         sdl_process_key(&ev->key);
 766     }
 767 }
 768
 769 static void handle_mousemotion(DisplayState *ds, SDL_Event *ev)
 770 {
 771     int max_x, max_y;
 772
 773     if (is_graphic_console() &&
 774         (kbd_mouse_is_absolute() || absolute_enabled)) {
 775         max_x = real_screen->w - 1;
 776         max_y = real_screen->h - 1;
 777         if (gui_grab && (ev->motion.x == 0 || ev->motion.y == 0 ||
 778             ev->motion.x == max_x || ev->motion.y == max_y)) {
 779             sdl_grab_end();
 780         }
 781         if (!gui_grab &&
 782             (ev->motion.x > 0 && ev->motion.x < max_x &&
 783             ev->motion.y > 0 && ev->motion.y < max_y)) {
 784             sdl_grab_start();
 785         }
 786     }
 787     if (gui_grab || kbd_mouse_is_absolute() || absolute_enabled) {
 788         sdl_send_mouse_event(ev->motion.xrel, ev->motion.yrel, 0,
 789                              ev->motion.x, ev->motion.y, ev->motion.state);
 790     }
 791 }
 792
 793 static void handle_mousebutton(DisplayState *ds, SDL_Event *ev)
 794 {
 795     int buttonstate = SDL_GetMouseState(NULL, NULL);
 796     SDL_MouseButtonEvent *bev;
 797     int dz;
 798
 799     if (!is_graphic_console()) {
 800         return;
 801     }
 802
 803     bev = &ev->button;
 804     if (!gui_grab && !kbd_mouse_is_absolute()) {
 805         if (ev->type == SDL_MOUSEBUTTONUP && bev->button == SDL_BUTTON_LEFT) {
 806             /* start grabbing all events */
 807             sdl_grab_start();
 808         }
 809     } else {
 810         dz = 0;
 811         if (ev->type == SDL_MOUSEBUTTONDOWN) {
 812             buttonstate |= SDL_BUTTON(bev->button);
 813         } else {
 814             buttonstate &= ~SDL_BUTTON(bev->button);
 815         }
 816 #ifdef SDL_BUTTON_WHEELUP
 817         if (bev->button == SDL_BUTTON_WHEELUP &&
 818             ev->type == SDL_MOUSEBUTTONDOWN) {
 819             dz = -1;
 820         } else if (bev->button == SDL_BUTTON_WHEELDOWN &&
 821                    ev->type == SDL_MOUSEBUTTONDOWN) {
 822             dz = 1;
 823         }
 824 #endif
 825         sdl_send_mouse_event(0, 0, dz, bev->x, bev->y, buttonstate);
 826     }
 827 }
 828
 829 static void handle_activation(DisplayState *ds, SDL_Event *ev)
 830 {
 831 #ifdef _WIN32
 832     /* Disable grab if the window no longer has the focus
 833      * (Windows-only workaround) */
 834     if (gui_grab && ev->active.state == SDL_APPINPUTFOCUS &&
 835         !ev->active.gain && !gui_fullscreen) {
 836         sdl_grab_end();
 837     }
 838 #endif
 839     if (!gui_grab && ev->active.gain && is_graphic_console() &&
 840         (kbd_mouse_is_absolute() || absolute_enabled)) {
 841         absolute_mouse_grab();
 842     }
 843     if (ev->active.state & SDL_APPACTIVE) {
 844         if (ev->active.gain) {
 845             /* Back to default interval */
 846             dcl->gui_timer_interval = 0;
 847             dcl->idle = 0;
 848         } else {
 849             /* Sleeping interval */
 850             dcl->gui_timer_interval = 500;
 851             dcl->idle = 1;
 852         }
 853     }
 854 }
 855
 856 static void sdl_refresh(DisplayState *ds)
 857 {
 858     SDL_Event ev1, *ev = &ev1;
 859
 860     if (last_vm_running != runstate_is_running()) {
 861         last_vm_running = runstate_is_running();
 862         sdl_update_caption();
 863     }
 864
 865     vga_hw_update();
 866     SDL_EnableUNICODE(!is_graphic_console());
 867
 868     while (SDL_PollEvent(ev)) {
 869         switch (ev->type) {
 870         case SDL_VIDEOEXPOSE:
 871             sdl_update(ds, 0, 0, real_screen->w, real_screen->h);
 872             break;
 873         case SDL_KEYDOWN:
 874             handle_keydown(ds, ev);
 875             break;
 876         case SDL_KEYUP:
 877             handle_keyup(ds, ev);
 878             break;
 879         case SDL_QUIT:
 880             if (!no_quit) {
 881                 no_shutdown = 0;
 882                 qemu_system_shutdown_request();
 883             }
 884             break;
 885         case SDL_MOUSEMOTION:
 886             handle_mousemotion(ds, ev);
 887             break;
 888         case SDL_MOUSEBUTTONDOWN:
 889         case SDL_MOUSEBUTTONUP:
 890             handle_mousebutton(ds, ev);
 891             break;
 892         case SDL_ACTIVEEVENT:
 893             handle_activation(ds, ev);
 894             break;
 895         case SDL_VIDEORESIZE:
 896             sdl_scale(ds, ev->resize.w, ev->resize.h);
 897             vga_hw_invalidate();
 898             vga_hw_update();
 899             break;
 900         default:
 901             break;
 902         }
 903     }
 904 }
 905
 906 static void sdl_fill(DisplayState *ds, int x, int y, int w, int h, uint32_t c)
 907 {
 908     SDL_Rect dst = { x, y, w, h };
 909     SDL_FillRect(real_screen, &dst, c);
 910 }
 911
 912 static void sdl_mouse_warp(int x, int y, int on)
 913 {
 914     if (on) {
 915         if (!guest_cursor)
 916             sdl_show_cursor();
 917         if (gui_grab || kbd_mouse_is_absolute() || absolute_enabled) {
 918             SDL_SetCursor(guest_sprite);
 919             if (!kbd_mouse_is_absolute() && !absolute_enabled)
 920                 SDL_WarpMouse(x, y);
 921         }
 922     } else if (gui_grab)
 923         sdl_hide_cursor();
 924     guest_cursor = on;
 925     guest_x = x, guest_y = y;
 926 }
 927
 928 static void sdl_mouse_define(QEMUCursor *c)
 929 {
 930     uint8_t *image, *mask;
 931     int bpl;
 932
 933     if (guest_sprite)
 934         SDL_FreeCursor(guest_sprite);
 935
 936     bpl = cursor_get_mono_bpl(c);
 937     image = g_malloc0(bpl * c->height);
 938     mask  = g_malloc0(bpl * c->height);
 939     cursor_get_mono_image(c, 0x000000, image);
 940     cursor_get_mono_mask(c, 0, mask);
 941     guest_sprite = SDL_CreateCursor(image, mask, c->width, c->height,
 942                                     c->hot_x, c->hot_y);
 943     g_free(image);
 944     g_free(mask);
 945
 946     if (guest_cursor &&
 947             (gui_grab || kbd_mouse_is_absolute() || absolute_enabled))
 948         SDL_SetCursor(guest_sprite);
 949 }
 950
 951 static void sdl_cleanup(void)
 952 {
 953     if (guest_sprite)
 954         SDL_FreeCursor(guest_sprite);
 955     SDL_QuitSubSystem(SDL_INIT_VIDEO);
 956 }
 957
 958 void sdl_display_init(DisplayState *ds, int full_screen, int no_frame)
 959 {
 960     int flags;
 961     uint8_t data = 0;
 962     DisplayAllocator *da;
 963     const SDL_VideoInfo *vi;
 964     char *filename;
 965
 966 #if defined(__APPLE__)
 967     /* always use generic keymaps */
 968     if (!keyboard_layout)
 969         keyboard_layout = "en-us";
 970 #endif
 971     if(keyboard_layout) {
 972         kbd_layout = init_keyboard_layout(name2keysym, keyboard_layout);
 973         if (!kbd_layout)
 974             exit(1);
 975     }
 976
 977     if (no_frame)
 978         gui_noframe = 1;
 979
 980     if (!full_screen) {
 981         setenv("SDL_VIDEO_ALLOW_SCREENSAVER", "1", 0);
 982     }
 983 #ifdef __linux__
 984     /* on Linux, SDL may use fbcon|directfb|svgalib when run without
 985      * accessible $DISPLAY to open X11 window.  This is often the case
 986      * when qemu is run using sudo.  But in this case, and when actually
 987      * run in X11 environment, SDL fights with X11 for the video card,
 988      * making current display unavailable, often until reboot.
 989      * So make x11 the default SDL video driver if this variable is unset.
 990      * This is a bit hackish but saves us from bigger problem.
 991      * Maybe it's a good idea to fix this in SDL instead.
 992      */
 993     setenv("SDL_VIDEODRIVER", "x11", 0);
 994 #endif
 995
 996     /* Enable normal up/down events for Caps-Lock and Num-Lock keys.
 997      * This requires SDL >= 1.2.14. */
 998     setenv("SDL_DISABLE_LOCK_KEYS", "1", 1);
 999
1000     flags = SDL_INIT_VIDEO | SDL_INIT_NOPARACHUTE;
1001     if (SDL_Init (flags)) {
1002         fprintf(stderr, "Could not initialize SDL(%s) - exiting\n",
1003                 SDL_GetError());
1004         exit(1);
1005     }
1006     vi = SDL_GetVideoInfo();
1007     host_format = *(vi->vfmt);
1008
1009     /* Load a 32x32x4 image. White pixels are transparent. */
1010     filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, "qemu-icon.bmp");
1011     if (filename) {
1012         SDL_Surface *image = SDL_LoadBMP(filename);
1013         if (image) {
1014             uint32_t colorkey = SDL_MapRGB(image->format, 255, 255, 255);
1015             SDL_SetColorKey(image, SDL_SRCCOLORKEY, colorkey);
1016             SDL_WM_SetIcon(image, NULL);
1017         }
1018         g_free(filename);
1019     }
1020
1021     if (full_screen) {
1022         gui_fullscreen = 1;
1023         sdl_grab_start();
1024     }
1025
1026     dcl = g_malloc0(sizeof(DisplayChangeListener));
1027     dcl->dpy_update = sdl_update;
1028     dcl->dpy_resize = sdl_resize;
1029     dcl->dpy_refresh = sdl_refresh;
1030     dcl->dpy_setdata = sdl_setdata;
1031     dcl->dpy_fill = sdl_fill;
1032     ds->mouse_set = sdl_mouse_warp;
1033     ds->cursor_define = sdl_mouse_define;
1034     register_displaychangelistener(ds, dcl);
1035
1036     da = g_malloc0(sizeof(DisplayAllocator));
1037     da->create_displaysurface = sdl_create_displaysurface;
1038     da->resize_displaysurface = sdl_resize_displaysurface;
1039     da->free_displaysurface = sdl_free_displaysurface;
1040     if (register_displayallocator(ds, da) == da) {
1041         dpy_resize(ds);
1042     }
1043
1044     mouse_mode_notifier.notify = sdl_mouse_mode_change;
1045     qemu_add_mouse_mode_change_notifier(&mouse_mode_notifier);
1046
1047     sdl_update_caption();
1048     SDL_EnableKeyRepeat(250, 50);
1049     gui_grab = 0;
1050
1051     sdl_cursor_hidden = SDL_CreateCursor(&data, &data, 8, 1, 0, 0);
1052     sdl_cursor_normal = SDL_GetCursor();
1053
1054     atexit(sdl_cleanup);
1055 }