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