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