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