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 #if 0
  65 #define DEBUG_SDL
  66 #endif
  67
  68 static void sdl_update(DisplayChangeListener *dcl,
  69                        int x, int y, int w, int h)
  70 {
  71     SDL_Rect rec;
  72     rec.x = x;
  73     rec.y = y;
  74     rec.w = w;
  75     rec.h = h;
  76
  77 #ifdef DEBUG_SDL
  78     printf("SDL: Updating x=%d y=%d w=%d h=%d (scaling: %d)\n",
  79            x, y, w, h, scaling_active);
  80 #endif
  81
  82     if (guest_screen) {
  83         if (!scaling_active) {
  84             SDL_BlitSurface(guest_screen, &rec, real_screen, &rec);
  85         } else {
  86             if (sdl_zoom_blit(guest_screen, real_screen, SMOOTHING_ON, &rec) < 0) {
  87                 fprintf(stderr, "Zoom blit failed\n");
  88                 exit(1);
  89             }
  90         }
  91     }
  92     SDL_UpdateRect(real_screen, rec.x, rec.y, rec.w, rec.h);
  93 }
  94
  95 static void do_sdl_resize(int width, int height, int bpp)
  96 {
  97     int flags;
  98     SDL_Surface *tmp_screen;
  99
 100 #ifdef DEBUG_SDL
 101     printf("SDL: Resizing to %dx%d bpp %d\n", width, height, bpp);
 102 #endif
 103
 104     flags = SDL_HWSURFACE | SDL_ASYNCBLIT | SDL_HWACCEL;
 105     if (gui_fullscreen) {
 106         flags |= SDL_FULLSCREEN;
 107     } else {
 108         flags |= SDL_RESIZABLE;
 109     }
 110     if (gui_noframe)
 111         flags |= SDL_NOFRAME;
 112
 113     tmp_screen = SDL_SetVideoMode(width, height, bpp, flags);
 114     if (!real_screen) {
 115         if (!tmp_screen) {
 116             fprintf(stderr, "Could not open SDL display (%dx%dx%d): %s\n",
 117                     width, height, bpp, SDL_GetError());
 118             exit(1);
 119         }
 120     } else {
 121         /*
 122          * Revert to the previous video mode if the change of resizing or
 123          * resolution failed.
 124          */
 125         if (!tmp_screen) {
 126             fprintf(stderr, "Failed to set SDL display (%dx%dx%d): %s\n",
 127                     width, height, bpp, SDL_GetError());
 128             return;
 129         }
 130     }
 131
 132     real_screen = tmp_screen;
 133 }
 134
 135 static void sdl_switch(DisplayChangeListener *dcl,
 136                        DisplaySurface *new_surface)
 137 {
 138     PixelFormat pf;
 139
 140     /* temporary hack: allows to call sdl_switch to handle scaling changes */
 141     if (new_surface) {
 142         surface = new_surface;
 143     }
 144     pf = qemu_pixelformat_from_pixman(surface->format);
 145
 146     if (!scaling_active) {
 147         do_sdl_resize(surface_width(surface), surface_height(surface), 0);
 148     } else if (real_screen->format->BitsPerPixel !=
 149                surface_bits_per_pixel(surface)) {
 150         do_sdl_resize(real_screen->w, real_screen->h,
 151                       surface_bits_per_pixel(surface));
 152     }
 153
 154     if (guest_screen != NULL) {
 155         SDL_FreeSurface(guest_screen);
 156     }
 157
 158 #ifdef DEBUG_SDL
 159     printf("SDL: Creating surface with masks: %08x %08x %08x %08x\n",
 160            pf.rmask, pf.gmask, pf.bmask, pf.amask);
 161 #endif
 162
 163     guest_screen = SDL_CreateRGBSurfaceFrom
 164         (surface_data(surface),
 165          surface_width(surface), surface_height(surface),
 166          surface_bits_per_pixel(surface), surface_stride(surface),
 167          pf.rmask, pf.gmask,
 168          pf.bmask, pf.amask);
 169 }
 170
 171 static bool sdl_check_format(DisplayChangeListener *dcl,
 172                              pixman_format_code_t format)
 173 {
 174     /*
 175      * We let SDL convert for us a few more formats than,
 176      * the native ones. Thes are the ones I have tested.
 177      */
 178     return (format == PIXMAN_x8r8g8b8 ||
 179             format == PIXMAN_b8g8r8x8 ||
 180             format == PIXMAN_x1r5g5b5 ||
 181             format == PIXMAN_r5g6b5);
 182 }
 183
 184 /* generic keyboard conversion */
 185
 186 #include "sdl_keysym.h"
 187
 188 static kbd_layout_t *kbd_layout = NULL;
 189
 190 static uint8_t sdl_keyevent_to_keycode_generic(const SDL_KeyboardEvent *ev)
 191 {
 192     int keysym;
 193     /* workaround for X11+SDL bug with AltGR */
 194     keysym = ev->keysym.sym;
 195     if (keysym == 0 && ev->keysym.scancode == 113)
 196         keysym = SDLK_MODE;
 197     /* For Japanese key '\' and '|' */
 198     if (keysym == 92 && ev->keysym.scancode == 133) {
 199         keysym = 0xa5;
 200     }
 201     return keysym2scancode(kbd_layout, keysym) & SCANCODE_KEYMASK;
 202 }
 203
 204 /* specific keyboard conversions from scan codes */
 205
 206 #if defined(_WIN32)
 207
 208 static uint8_t sdl_keyevent_to_keycode(const SDL_KeyboardEvent *ev)
 209 {
 210     return ev->keysym.scancode;
 211 }
 212
 213 #else
 214
 215 #if defined(SDL_VIDEO_DRIVER_X11)
 216 #include <X11/XKBlib.h>
 217
 218 static int check_for_evdev(void)
 219 {
 220     SDL_SysWMinfo info;
 221     XkbDescPtr desc = NULL;
 222     int has_evdev = 0;
 223     char *keycodes = NULL;
 224
 225     SDL_VERSION(&info.version);
 226     if (!SDL_GetWMInfo(&info)) {
 227         return 0;
 228     }
 229     desc = XkbGetKeyboard(info.info.x11.display,
 230                           XkbGBN_AllComponentsMask,
 231                           XkbUseCoreKbd);
 232     if (desc && desc->names) {
 233         keycodes = XGetAtomName(info.info.x11.display, desc->names->keycodes);
 234         if (keycodes == NULL) {
 235             fprintf(stderr, "could not lookup keycode name\n");
 236         } else if (strstart(keycodes, "evdev", NULL)) {
 237             has_evdev = 1;
 238         } else if (!strstart(keycodes, "xfree86", NULL)) {
 239             fprintf(stderr, "unknown keycodes `%s', please report to "
 240                     "qemu-devel@nongnu.org\n", keycodes);
 241         }
 242     }
 243
 244     if (desc) {
 245         XkbFreeKeyboard(desc, XkbGBN_AllComponentsMask, True);
 246     }
 247     if (keycodes) {
 248         XFree(keycodes);
 249     }
 250     return has_evdev;
 251 }
 252 #else
 253 static int check_for_evdev(void)
 254 {
 255         return 0;
 256 }
 257 #endif
 258
 259 static uint8_t sdl_keyevent_to_keycode(const SDL_KeyboardEvent *ev)
 260 {
 261     int keycode;
 262     static int has_evdev = -1;
 263
 264     if (has_evdev == -1)
 265         has_evdev = check_for_evdev();
 266
 267     keycode = ev->keysym.scancode;
 268
 269     if (keycode < 9) {
 270         keycode = 0;
 271     } else if (keycode < 97) {
 272         keycode -= 8; /* just an offset */
 273     } else if (keycode < 158) {
 274         /* use conversion table */
 275         if (has_evdev)
 276             keycode = translate_evdev_keycode(keycode - 97);
 277         else
 278             keycode = translate_xfree86_keycode(keycode - 97);
 279     } else if (keycode == 208) { /* Hiragana_Katakana */
 280         keycode = 0x70;
 281     } else if (keycode == 211) { /* backslash */
 282         keycode = 0x73;
 283     } else {
 284         keycode = 0;
 285     }
 286     return keycode;
 287 }
 288
 289 #endif
 290
 291 static void reset_keys(void)
 292 {
 293     int i;
 294     for(i = 0; i < 256; i++) {
 295         if (modifiers_state[i]) {
 296             qemu_input_event_send_key_number(dcl->con, i, false);
 297             modifiers_state[i] = 0;
 298         }
 299     }
 300 }
 301
 302 static void sdl_process_key(SDL_KeyboardEvent *ev)
 303 {
 304     int keycode;
 305
 306     if (ev->keysym.sym == SDLK_PAUSE) {
 307         /* specific case */
 308         qemu_input_event_send_key_qcode(dcl->con, Q_KEY_CODE_PAUSE,
 309                                         ev->type == SDL_KEYDOWN);
 310         return;
 311     }
 312
 313     if (kbd_layout) {
 314         keycode = sdl_keyevent_to_keycode_generic(ev);
 315     } else {
 316         keycode = sdl_keyevent_to_keycode(ev);
 317     }
 318
 319     switch(keycode) {
 320     case 0x00:
 321         /* sent when leaving window: reset the modifiers state */
 322         reset_keys();
 323         return;
 324     case 0x2a:                          /* Left Shift */
 325     case 0x36:                          /* Right Shift */
 326     case 0x1d:                          /* Left CTRL */
 327     case 0x9d:                          /* Right CTRL */
 328     case 0x38:                          /* Left ALT */
 329     case 0xb8:                         /* Right ALT */
 330         if (ev->type == SDL_KEYUP)
 331             modifiers_state[keycode] = 0;
 332         else
 333             modifiers_state[keycode] = 1;
 334         break;
 335 #define QEMU_SDL_VERSION ((SDL_MAJOR_VERSION << 8) + SDL_MINOR_VERSION)
 336 #if QEMU_SDL_VERSION < 0x102 || QEMU_SDL_VERSION == 0x102 && SDL_PATCHLEVEL < 14
 337         /* SDL versions before 1.2.14 don't support key up for caps/num lock. */
 338     case 0x45: /* num lock */
 339     case 0x3a: /* caps lock */
 340         /* SDL does not send the key up event, so we generate it */
 341         qemu_input_event_send_key_number(dcl->con, keycode, true);
 342         qemu_input_event_send_key_number(dcl->con, keycode, false);
 343         return;
 344 #endif
 345     }
 346
 347     /* now send the key code */
 348     qemu_input_event_send_key_number(dcl->con, keycode,
 349                                      ev->type == SDL_KEYDOWN);
 350 }
 351
 352 static void sdl_update_caption(void)
 353 {
 354     char win_title[1024];
 355     char icon_title[1024];
 356     const char *status = "";
 357
 358     if (!runstate_is_running())
 359         status = " [Stopped]";
 360     else if (gui_grab) {
 361         if (alt_grab)
 362             status = " - Press Ctrl-Alt-Shift to exit mouse grab";
 363         else if (ctrl_grab)
 364             status = " - Press Right-Ctrl to exit mouse grab";
 365         else
 366             status = " - Press Ctrl-Alt to exit mouse grab";
 367     }
 368
 369     if (qemu_name) {
 370         snprintf(win_title, sizeof(win_title), "QEMU (%s)%s", qemu_name, status);
 371         snprintf(icon_title, sizeof(icon_title), "QEMU (%s)", qemu_name);
 372     } else {
 373         snprintf(win_title, sizeof(win_title), "QEMU%s", status);
 374         snprintf(icon_title, sizeof(icon_title), "QEMU");
 375     }
 376
 377     SDL_WM_SetCaption(win_title, icon_title);
 378 }
 379
 380 static void sdl_hide_cursor(void)
 381 {
 382     if (!cursor_hide)
 383         return;
 384
 385     if (qemu_input_is_absolute()) {
 386         SDL_ShowCursor(1);
 387         SDL_SetCursor(sdl_cursor_hidden);
 388     } else {
 389         SDL_ShowCursor(0);
 390     }
 391 }
 392
 393 static void sdl_show_cursor(void)
 394 {
 395     if (!cursor_hide)
 396         return;
 397
 398     if (!qemu_input_is_absolute() || !qemu_console_is_graphic(NULL)) {
 399         SDL_ShowCursor(1);
 400         if (guest_cursor &&
 401                 (gui_grab || qemu_input_is_absolute() || absolute_enabled))
 402             SDL_SetCursor(guest_sprite);
 403         else
 404             SDL_SetCursor(sdl_cursor_normal);
 405     }
 406 }
 407
 408 static void sdl_grab_start(void)
 409 {
 410     /*
 411      * If the application is not active, do not try to enter grab state. This
 412      * prevents 'SDL_WM_GrabInput(SDL_GRAB_ON)' from blocking all the
 413      * application (SDL bug).
 414      */
 415     if (!(SDL_GetAppState() & SDL_APPINPUTFOCUS)) {
 416         return;
 417     }
 418     if (guest_cursor) {
 419         SDL_SetCursor(guest_sprite);
 420         if (!qemu_input_is_absolute() && !absolute_enabled) {
 421             SDL_WarpMouse(guest_x, guest_y);
 422         }
 423     } else
 424         sdl_hide_cursor();
 425     SDL_WM_GrabInput(SDL_GRAB_ON);
 426     gui_grab = 1;
 427     sdl_update_caption();
 428 }
 429
 430 static void sdl_grab_end(void)
 431 {
 432     SDL_WM_GrabInput(SDL_GRAB_OFF);
 433     gui_grab = 0;
 434     sdl_show_cursor();
 435     sdl_update_caption();
 436 }
 437
 438 static void absolute_mouse_grab(void)
 439 {
 440     int mouse_x, mouse_y;
 441
 442     SDL_GetMouseState(&mouse_x, &mouse_y);
 443     if (mouse_x > 0 && mouse_x < real_screen->w - 1 &&
 444         mouse_y > 0 && mouse_y < real_screen->h - 1) {
 445         sdl_grab_start();
 446     }
 447 }
 448
 449 static void sdl_mouse_mode_change(Notifier *notify, void *data)
 450 {
 451     if (qemu_input_is_absolute()) {
 452         if (!absolute_enabled) {
 453             absolute_enabled = 1;
 454             if (qemu_console_is_graphic(NULL)) {
 455                 absolute_mouse_grab();
 456             }
 457         }
 458     } else if (absolute_enabled) {
 459         if (!gui_fullscreen) {
 460             sdl_grab_end();
 461         }
 462         absolute_enabled = 0;
 463     }
 464 }
 465
 466 static void sdl_send_mouse_event(int dx, int dy, int x, int y, int state)
 467 {
 468     static uint32_t bmap[INPUT_BUTTON_MAX] = {
 469         [INPUT_BUTTON_LEFT]       = SDL_BUTTON(SDL_BUTTON_LEFT),
 470         [INPUT_BUTTON_MIDDLE]     = SDL_BUTTON(SDL_BUTTON_MIDDLE),
 471         [INPUT_BUTTON_RIGHT]      = SDL_BUTTON(SDL_BUTTON_RIGHT),
 472         [INPUT_BUTTON_WHEEL_UP]   = SDL_BUTTON(SDL_BUTTON_WHEELUP),
 473         [INPUT_BUTTON_WHEEL_DOWN] = SDL_BUTTON(SDL_BUTTON_WHEELDOWN),
 474     };
 475     static uint32_t prev_state;
 476
 477     if (prev_state != state) {
 478         qemu_input_update_buttons(dcl->con, bmap, prev_state, state);
 479         prev_state = state;
 480     }
 481
 482     if (qemu_input_is_absolute()) {
 483         qemu_input_queue_abs(dcl->con, INPUT_AXIS_X, x,
 484                              real_screen->w);
 485         qemu_input_queue_abs(dcl->con, INPUT_AXIS_Y, y,
 486                              real_screen->h);
 487     } else {
 488         if (guest_cursor) {
 489             x -= guest_x;
 490             y -= guest_y;
 491             guest_x += x;
 492             guest_y += y;
 493             dx = x;
 494             dy = y;
 495         }
 496         qemu_input_queue_rel(dcl->con, INPUT_AXIS_X, dx);
 497         qemu_input_queue_rel(dcl->con, INPUT_AXIS_Y, dy);
 498     }
 499     qemu_input_event_sync();
 500 }
 501
 502 static void sdl_scale(int width, int height)
 503 {
 504     int bpp = real_screen->format->BitsPerPixel;
 505
 506 #ifdef DEBUG_SDL
 507     printf("SDL: Scaling to %dx%d bpp %d\n", width, height, bpp);
 508 #endif
 509
 510     if (bpp != 16 && bpp != 32) {
 511         bpp = 32;
 512     }
 513     do_sdl_resize(width, height, bpp);
 514     scaling_active = 1;
 515 }
 516
 517 static void toggle_full_screen(void)
 518 {
 519     int width = surface_width(surface);
 520     int height = surface_height(surface);
 521     int bpp = surface_bits_per_pixel(surface);
 522
 523     gui_fullscreen = !gui_fullscreen;
 524     if (gui_fullscreen) {
 525         gui_saved_width = real_screen->w;
 526         gui_saved_height = real_screen->h;
 527         gui_saved_scaling = scaling_active;
 528
 529         do_sdl_resize(width, height, bpp);
 530         scaling_active = 0;
 531
 532         gui_saved_grab = gui_grab;
 533         sdl_grab_start();
 534     } else {
 535         if (gui_saved_scaling) {
 536             sdl_scale(gui_saved_width, gui_saved_height);
 537         } else {
 538             do_sdl_resize(width, height, 0);
 539         }
 540         if (!gui_saved_grab || !qemu_console_is_graphic(NULL)) {
 541             sdl_grab_end();
 542         }
 543     }
 544     graphic_hw_invalidate(NULL);
 545     graphic_hw_update(NULL);
 546 }
 547
 548 static void handle_keydown(SDL_Event *ev)
 549 {
 550     int mod_state;
 551     int keycode;
 552
 553     if (alt_grab) {
 554         mod_state = (SDL_GetModState() & (gui_grab_code | KMOD_LSHIFT)) ==
 555                     (gui_grab_code | KMOD_LSHIFT);
 556     } else if (ctrl_grab) {
 557         mod_state = (SDL_GetModState() & KMOD_RCTRL) == KMOD_RCTRL;
 558     } else {
 559         mod_state = (SDL_GetModState() & gui_grab_code) == gui_grab_code;
 560     }
 561     gui_key_modifier_pressed = mod_state;
 562
 563     if (gui_key_modifier_pressed) {
 564         keycode = sdl_keyevent_to_keycode(&ev->key);
 565         switch (keycode) {
 566         case 0x21: /* 'f' key on US keyboard */
 567             toggle_full_screen();
 568             gui_keysym = 1;
 569             break;
 570         case 0x16: /* 'u' key on US keyboard */
 571             if (scaling_active) {
 572                 scaling_active = 0;
 573                 sdl_switch(dcl, NULL);
 574                 graphic_hw_invalidate(NULL);
 575                 graphic_hw_update(NULL);
 576             }
 577             gui_keysym = 1;
 578             break;
 579         case 0x02 ... 0x0a: /* '1' to '9' keys */
 580             /* Reset the modifiers sent to the current console */
 581             reset_keys();
 582             console_select(keycode - 0x02);
 583             gui_keysym = 1;
 584             if (gui_fullscreen) {
 585                 break;
 586             }
 587             if (!qemu_console_is_graphic(NULL)) {
 588                 /* release grab if going to a text console */
 589                 if (gui_grab) {
 590                     sdl_grab_end();
 591                 } else if (absolute_enabled) {
 592                     sdl_show_cursor();
 593                 }
 594             } else if (absolute_enabled) {
 595                 sdl_hide_cursor();
 596                 absolute_mouse_grab();
 597             }
 598             break;
 599         case 0x1b: /* '+' */
 600         case 0x35: /* '-' */
 601             if (!gui_fullscreen) {
 602                 int width = MAX(real_screen->w + (keycode == 0x1b ? 50 : -50),
 603                                 160);
 604                 int height = (surface_height(surface) * width) /
 605                     surface_width(surface);
 606
 607                 sdl_scale(width, height);
 608                 graphic_hw_invalidate(NULL);
 609                 graphic_hw_update(NULL);
 610                 gui_keysym = 1;
 611             }
 612         default:
 613             break;
 614         }
 615     } else if (!qemu_console_is_graphic(NULL)) {
 616         int keysym = 0;
 617
 618         if (ev->key.keysym.mod & (KMOD_LCTRL | KMOD_RCTRL)) {
 619             switch (ev->key.keysym.sym) {
 620             case SDLK_UP:
 621                 keysym = QEMU_KEY_CTRL_UP;
 622                 break;
 623             case SDLK_DOWN:
 624                 keysym = QEMU_KEY_CTRL_DOWN;
 625                 break;
 626             case SDLK_LEFT:
 627                 keysym = QEMU_KEY_CTRL_LEFT;
 628                 break;
 629             case SDLK_RIGHT:
 630                 keysym = QEMU_KEY_CTRL_RIGHT;
 631                 break;
 632             case SDLK_HOME:
 633                 keysym = QEMU_KEY_CTRL_HOME;
 634                 break;
 635             case SDLK_END:
 636                 keysym = QEMU_KEY_CTRL_END;
 637                 break;
 638             case SDLK_PAGEUP:
 639                 keysym = QEMU_KEY_CTRL_PAGEUP;
 640                 break;
 641             case SDLK_PAGEDOWN:
 642                 keysym = QEMU_KEY_CTRL_PAGEDOWN;
 643                 break;
 644             default:
 645                 break;
 646             }
 647         } else {
 648             switch (ev->key.keysym.sym) {
 649             case SDLK_UP:
 650                 keysym = QEMU_KEY_UP;
 651                 break;
 652             case SDLK_DOWN:
 653                 keysym = QEMU_KEY_DOWN;
 654                 break;
 655             case SDLK_LEFT:
 656                 keysym = QEMU_KEY_LEFT;
 657                 break;
 658             case SDLK_RIGHT:
 659                 keysym = QEMU_KEY_RIGHT;
 660                 break;
 661             case SDLK_HOME:
 662                 keysym = QEMU_KEY_HOME;
 663                 break;
 664             case SDLK_END:
 665                 keysym = QEMU_KEY_END;
 666                 break;
 667             case SDLK_PAGEUP:
 668                 keysym = QEMU_KEY_PAGEUP;
 669                 break;
 670             case SDLK_PAGEDOWN:
 671                 keysym = QEMU_KEY_PAGEDOWN;
 672                 break;
 673             case SDLK_BACKSPACE:
 674                 keysym = QEMU_KEY_BACKSPACE;
 675                 break;
 676             case SDLK_DELETE:
 677                 keysym = QEMU_KEY_DELETE;
 678                 break;
 679             default:
 680                 break;
 681             }
 682         }
 683         if (keysym) {
 684             kbd_put_keysym(keysym);
 685         } else if (ev->key.keysym.unicode != 0) {
 686             kbd_put_keysym(ev->key.keysym.unicode);
 687         }
 688     }
 689     if (qemu_console_is_graphic(NULL) && !gui_keysym) {
 690         sdl_process_key(&ev->key);
 691     }
 692 }
 693
 694 static void handle_keyup(SDL_Event *ev)
 695 {
 696     int mod_state;
 697
 698     if (!alt_grab) {
 699         mod_state = (ev->key.keysym.mod & gui_grab_code);
 700     } else {
 701         mod_state = (ev->key.keysym.mod & (gui_grab_code | KMOD_LSHIFT));
 702     }
 703     if (!mod_state && gui_key_modifier_pressed) {
 704         gui_key_modifier_pressed = 0;
 705         if (gui_keysym == 0) {
 706             /* exit/enter grab if pressing Ctrl-Alt */
 707             if (!gui_grab) {
 708                 if (qemu_console_is_graphic(NULL)) {
 709                     sdl_grab_start();
 710                 }
 711             } else if (!gui_fullscreen) {
 712                 sdl_grab_end();
 713             }
 714             /* SDL does not send back all the modifiers key, so we must
 715              * correct it. */
 716             reset_keys();
 717             return;
 718         }
 719         gui_keysym = 0;
 720     }
 721     if (qemu_console_is_graphic(NULL) && !gui_keysym) {
 722         sdl_process_key(&ev->key);
 723     }
 724 }
 725
 726 static void handle_mousemotion(SDL_Event *ev)
 727 {
 728     int max_x, max_y;
 729
 730     if (qemu_console_is_graphic(NULL) &&
 731         (qemu_input_is_absolute() || absolute_enabled)) {
 732         max_x = real_screen->w - 1;
 733         max_y = real_screen->h - 1;
 734         if (gui_grab && (ev->motion.x == 0 || ev->motion.y == 0 ||
 735             ev->motion.x == max_x || ev->motion.y == max_y)) {
 736             sdl_grab_end();
 737         }
 738         if (!gui_grab &&
 739             (ev->motion.x > 0 && ev->motion.x < max_x &&
 740             ev->motion.y > 0 && ev->motion.y < max_y)) {
 741             sdl_grab_start();
 742         }
 743     }
 744     if (gui_grab || qemu_input_is_absolute() || absolute_enabled) {
 745         sdl_send_mouse_event(ev->motion.xrel, ev->motion.yrel,
 746                              ev->motion.x, ev->motion.y, ev->motion.state);
 747     }
 748 }
 749
 750 static void handle_mousebutton(SDL_Event *ev)
 751 {
 752     int buttonstate = SDL_GetMouseState(NULL, NULL);
 753     SDL_MouseButtonEvent *bev;
 754
 755     if (!qemu_console_is_graphic(NULL)) {
 756         return;
 757     }
 758
 759     bev = &ev->button;
 760     if (!gui_grab && !qemu_input_is_absolute()) {
 761         if (ev->type == SDL_MOUSEBUTTONUP && bev->button == SDL_BUTTON_LEFT) {
 762             /* start grabbing all events */
 763             sdl_grab_start();
 764         }
 765     } else {
 766         if (ev->type == SDL_MOUSEBUTTONDOWN) {
 767             buttonstate |= SDL_BUTTON(bev->button);
 768         } else {
 769             buttonstate &= ~SDL_BUTTON(bev->button);
 770         }
 771         sdl_send_mouse_event(0, 0, bev->x, bev->y, buttonstate);
 772     }
 773 }
 774
 775 static void handle_activation(SDL_Event *ev)
 776 {
 777 #ifdef _WIN32
 778     /* Disable grab if the window no longer has the focus
 779      * (Windows-only workaround) */
 780     if (gui_grab && ev->active.state == SDL_APPINPUTFOCUS &&
 781         !ev->active.gain && !gui_fullscreen) {
 782         sdl_grab_end();
 783     }
 784 #endif
 785     if (!gui_grab && ev->active.gain && qemu_console_is_graphic(NULL) &&
 786         (qemu_input_is_absolute() || absolute_enabled)) {
 787         absolute_mouse_grab();
 788     }
 789     if (ev->active.state & SDL_APPACTIVE) {
 790         if (ev->active.gain) {
 791             /* Back to default interval */
 792             update_displaychangelistener(dcl, GUI_REFRESH_INTERVAL_DEFAULT);
 793         } else {
 794             /* Sleeping interval.  Not using the long default here as
 795              * sdl_refresh does not only update the guest screen, but
 796              * also checks for gui events. */
 797             update_displaychangelistener(dcl, 500);
 798         }
 799     }
 800 }
 801
 802 static void sdl_refresh(DisplayChangeListener *dcl)
 803 {
 804     SDL_Event ev1, *ev = &ev1;
 805
 806     if (last_vm_running != runstate_is_running()) {
 807         last_vm_running = runstate_is_running();
 808         sdl_update_caption();
 809     }
 810
 811     graphic_hw_update(NULL);
 812     SDL_EnableUNICODE(!qemu_console_is_graphic(NULL));
 813
 814     while (SDL_PollEvent(ev)) {
 815         switch (ev->type) {
 816         case SDL_VIDEOEXPOSE:
 817             sdl_update(dcl, 0, 0, real_screen->w, real_screen->h);
 818             break;
 819         case SDL_KEYDOWN:
 820             handle_keydown(ev);
 821             break;
 822         case SDL_KEYUP:
 823             handle_keyup(ev);
 824             break;
 825         case SDL_QUIT:
 826             if (!no_quit) {
 827                 no_shutdown = 0;
 828                 qemu_system_shutdown_request();
 829             }
 830             break;
 831         case SDL_MOUSEMOTION:
 832             handle_mousemotion(ev);
 833             break;
 834         case SDL_MOUSEBUTTONDOWN:
 835         case SDL_MOUSEBUTTONUP:
 836             handle_mousebutton(ev);
 837             break;
 838         case SDL_ACTIVEEVENT:
 839             handle_activation(ev);
 840             break;
 841         case SDL_VIDEORESIZE:
 842             sdl_scale(ev->resize.w, ev->resize.h);
 843             graphic_hw_invalidate(NULL);
 844             graphic_hw_update(NULL);
 845             break;
 846         default:
 847             break;
 848         }
 849     }
 850 }
 851
 852 static void sdl_mouse_warp(DisplayChangeListener *dcl,
 853                            int x, int y, int on)
 854 {
 855     if (on) {
 856         if (!guest_cursor)
 857             sdl_show_cursor();
 858         if (gui_grab || qemu_input_is_absolute() || absolute_enabled) {
 859             SDL_SetCursor(guest_sprite);
 860             if (!qemu_input_is_absolute() && !absolute_enabled) {
 861                 SDL_WarpMouse(x, y);
 862             }
 863         }
 864     } else if (gui_grab)
 865         sdl_hide_cursor();
 866     guest_cursor = on;
 867     guest_x = x, guest_y = y;
 868 }
 869
 870 static void sdl_mouse_define(DisplayChangeListener *dcl,
 871                              QEMUCursor *c)
 872 {
 873     uint8_t *image, *mask;
 874     int bpl;
 875
 876     if (guest_sprite)
 877         SDL_FreeCursor(guest_sprite);
 878
 879     bpl = cursor_get_mono_bpl(c);
 880     image = g_malloc0(bpl * c->height);
 881     mask  = g_malloc0(bpl * c->height);
 882     cursor_get_mono_image(c, 0x000000, image);
 883     cursor_get_mono_mask(c, 0, mask);
 884     guest_sprite = SDL_CreateCursor(image, mask, c->width, c->height,
 885                                     c->hot_x, c->hot_y);
 886     g_free(image);
 887     g_free(mask);
 888
 889     if (guest_cursor &&
 890             (gui_grab || qemu_input_is_absolute() || absolute_enabled))
 891         SDL_SetCursor(guest_sprite);
 892 }
 893
 894 static void sdl_cleanup(void)
 895 {
 896     if (guest_sprite)
 897         SDL_FreeCursor(guest_sprite);
 898     SDL_QuitSubSystem(SDL_INIT_VIDEO);
 899 }
 900
 901 static const DisplayChangeListenerOps dcl_ops = {
 902     .dpy_name             = "sdl",
 903     .dpy_gfx_update       = sdl_update,
 904     .dpy_gfx_switch       = sdl_switch,
 905     .dpy_gfx_check_format = sdl_check_format,
 906     .dpy_refresh          = sdl_refresh,
 907     .dpy_mouse_set        = sdl_mouse_warp,
 908     .dpy_cursor_define    = sdl_mouse_define,
 909 };
 910
 911 void sdl_display_init(DisplayState *ds, int full_screen, int no_frame)
 912 {
 913     int flags;
 914     uint8_t data = 0;
 915     const SDL_VideoInfo *vi;
 916     char *filename;
 917
 918 #if defined(__APPLE__)
 919     /* always use generic keymaps */
 920     if (!keyboard_layout)
 921         keyboard_layout = "en-us";
 922 #endif
 923     if(keyboard_layout) {
 924         kbd_layout = init_keyboard_layout(name2keysym, keyboard_layout);
 925         if (!kbd_layout)
 926             exit(1);
 927     }
 928
 929     if (no_frame)
 930         gui_noframe = 1;
 931
 932     if (!full_screen) {
 933         setenv("SDL_VIDEO_ALLOW_SCREENSAVER", "1", 0);
 934     }
 935 #ifdef __linux__
 936     /* on Linux, SDL may use fbcon|directfb|svgalib when run without
 937      * accessible $DISPLAY to open X11 window.  This is often the case
 938      * when qemu is run using sudo.  But in this case, and when actually
 939      * run in X11 environment, SDL fights with X11 for the video card,
 940      * making current display unavailable, often until reboot.
 941      * So make x11 the default SDL video driver if this variable is unset.
 942      * This is a bit hackish but saves us from bigger problem.
 943      * Maybe it's a good idea to fix this in SDL instead.
 944      */
 945     setenv("SDL_VIDEODRIVER", "x11", 0);
 946 #endif
 947
 948     /* Enable normal up/down events for Caps-Lock and Num-Lock keys.
 949      * This requires SDL >= 1.2.14. */
 950     setenv("SDL_DISABLE_LOCK_KEYS", "1", 1);
 951
 952     flags = SDL_INIT_VIDEO | SDL_INIT_NOPARACHUTE;
 953     if (SDL_Init (flags)) {
 954         fprintf(stderr, "Could not initialize SDL(%s) - exiting\n",
 955                 SDL_GetError());
 956         exit(1);
 957     }
 958     vi = SDL_GetVideoInfo();
 959     host_format = *(vi->vfmt);
 960
 961     /* Load a 32x32x4 image. White pixels are transparent. */
 962     filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, "qemu-icon.bmp");
 963     if (filename) {
 964         SDL_Surface *image = SDL_LoadBMP(filename);
 965         if (image) {
 966             uint32_t colorkey = SDL_MapRGB(image->format, 255, 255, 255);
 967             SDL_SetColorKey(image, SDL_SRCCOLORKEY, colorkey);
 968             SDL_WM_SetIcon(image, NULL);
 969         }
 970         g_free(filename);
 971     }
 972
 973     if (full_screen) {
 974         gui_fullscreen = 1;
 975         sdl_grab_start();
 976     }
 977
 978     dcl = g_malloc0(sizeof(DisplayChangeListener));
 979     dcl->ops = &dcl_ops;
 980     register_displaychangelistener(dcl);
 981
 982     mouse_mode_notifier.notify = sdl_mouse_mode_change;
 983     qemu_add_mouse_mode_change_notifier(&mouse_mode_notifier);
 984
 985     sdl_update_caption();
 986     SDL_EnableKeyRepeat(250, 50);
 987     gui_grab = 0;
 988
 989     sdl_cursor_hidden = SDL_CreateCursor(&data, &data, 8, 1, 0, 0);
 990     sdl_cursor_normal = SDL_GetCursor();
 991
 992     atexit(sdl_cleanup);
 993 }