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