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