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