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