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 #include "vl.h"
  25
  26 #include <SDL.h>
  27
  28 #ifndef _WIN32
  29 #include <signal.h>
  30 #endif
  31
  32 static SDL_Surface *screen;
  33 static int gui_grab; /* if true, all keyboard/mouse events are grabbed */
  34 static int last_vm_running;
  35 static int gui_saved_grab;
  36 static int gui_fullscreen;
  37 static int gui_key_modifier_pressed;
  38 static int gui_keysym;
  39 static int gui_fullscreen_initial_grab;
  40 static int gui_grab_code = KMOD_LALT | KMOD_LCTRL;
  41 static uint8_t modifiers_state[256];
  42 static int width, height;
  43 static SDL_Cursor *sdl_cursor_normal;
  44 static SDL_Cursor *sdl_cursor_hidden;
  45 static int absolute_enabled = 0;
  46
  47 static void sdl_update(DisplayState *ds, int x, int y, int w, int h)
  48 {
  49     //    printf("updating x=%d y=%d w=%d h=%d\n", x, y, w, h);
  50     SDL_UpdateRect(screen, x, y, w, h);
  51 }
  52
  53 static void sdl_resize(DisplayState *ds, int w, int h)
  54 {
  55     int flags;
  56
  57     //    printf("resizing to %d %d\n", w, h);
  58
  59     flags = SDL_HWSURFACE|SDL_ASYNCBLIT|SDL_HWACCEL;
  60     if (gui_fullscreen)
  61         flags |= SDL_FULLSCREEN;
  62
  63     width = w;
  64     height = h;
  65
  66  again:
  67     screen = SDL_SetVideoMode(w, h, 0, flags);
  68     if (!screen) {
  69         fprintf(stderr, "Could not open SDL display\n");
  70         exit(1);
  71     }
  72     if (!screen->pixels && (flags & SDL_HWSURFACE) && (flags & SDL_FULLSCREEN)) {
  73         flags &= ~SDL_HWSURFACE;
  74         goto again;
  75     }
  76
  77     if (!screen->pixels) {
  78         fprintf(stderr, "Could not open SDL display\n");
  79         exit(1);
  80     }
  81     ds->data = screen->pixels;
  82     ds->linesize = screen->pitch;
  83     ds->depth = screen->format->BitsPerPixel;
  84     if (ds->depth == 32 && screen->format->Rshift == 0) {
  85         ds->bgr = 1;
  86     } else {
  87         ds->bgr = 0;
  88     }
  89     ds->width = w;
  90     ds->height = h;
  91 }
  92
  93 /* generic keyboard conversion */
  94
  95 #include "sdl_keysym.h"
  96 #include "keymaps.c"
  97
  98 static kbd_layout_t *kbd_layout = NULL;
  99
 100 static uint8_t sdl_keyevent_to_keycode_generic(const SDL_KeyboardEvent *ev)
 101 {
 102     int keysym;
 103     /* workaround for X11+SDL bug with AltGR */
 104     keysym = ev->keysym.sym;
 105     if (keysym == 0 && ev->keysym.scancode == 113)
 106         keysym = SDLK_MODE;
 107     return keysym2scancode(kbd_layout, keysym);
 108 }
 109
 110 /* specific keyboard conversions from scan codes */
 111
 112 #if defined(_WIN32)
 113
 114 static uint8_t sdl_keyevent_to_keycode(const SDL_KeyboardEvent *ev)
 115 {
 116     return ev->keysym.scancode;
 117 }
 118
 119 #else
 120
 121 static const uint8_t x_keycode_to_pc_keycode[61] = {
 122    0xc7,      /*  97  Home   */
 123    0xc8,      /*  98  Up     */
 124    0xc9,      /*  99  PgUp   */
 125    0xcb,      /* 100  Left   */
 126    0x4c,        /* 101  KP-5   */
 127    0xcd,      /* 102  Right  */
 128    0xcf,      /* 103  End    */
 129    0xd0,      /* 104  Down   */
 130    0xd1,      /* 105  PgDn   */
 131    0xd2,      /* 106  Ins    */
 132    0xd3,      /* 107  Del    */
 133    0x9c,      /* 108  Enter  */
 134    0x9d,      /* 109  Ctrl-R */
 135    0x0,       /* 110  Pause  */
 136    0xb7,      /* 111  Print  */
 137    0xb5,      /* 112  Divide */
 138    0xb8,      /* 113  Alt-R  */
 139    0xc6,      /* 114  Break  */
 140    0x0,         /* 115 */
 141    0x0,         /* 116 */
 142    0x0,         /* 117 */
 143    0x0,         /* 118 */
 144    0x0,         /* 119 */
 145    0x70,         /* 120 Hiragana_Katakana */
 146    0x0,         /* 121 */
 147    0x0,         /* 122 */
 148    0x73,         /* 123 backslash */
 149    0x0,         /* 124 */
 150    0x0,         /* 125 */
 151    0x0,         /* 126 */
 152    0x0,         /* 127 */
 153    0x0,         /* 128 */
 154    0x79,         /* 129 Henkan */
 155    0x0,         /* 130 */
 156    0x7b,         /* 131 Muhenkan */
 157    0x0,         /* 132 */
 158    0x7d,         /* 133 Yen */
 159    0x0,         /* 134 */
 160    0x0,         /* 135 */
 161    0x47,         /* 136 KP_7 */
 162    0x48,         /* 137 KP_8 */
 163    0x49,         /* 138 KP_9 */
 164    0x4b,         /* 139 KP_4 */
 165    0x4c,         /* 140 KP_5 */
 166    0x4d,         /* 141 KP_6 */
 167    0x4f,         /* 142 KP_1 */
 168    0x50,         /* 143 KP_2 */
 169    0x51,         /* 144 KP_3 */
 170    0x52,         /* 145 KP_0 */
 171    0x53,         /* 146 KP_. */
 172    0x47,         /* 147 KP_HOME */
 173    0x48,         /* 148 KP_UP */
 174    0x49,         /* 149 KP_PgUp */
 175    0x4b,         /* 150 KP_Left */
 176    0x4c,         /* 151 KP_ */
 177    0x4d,         /* 152 KP_Right */
 178    0x4f,         /* 153 KP_End */
 179    0x50,         /* 154 KP_Down */
 180    0x51,         /* 155 KP_PgDn */
 181    0x52,         /* 156 KP_Ins */
 182    0x53,         /* 157 KP_Del */
 183 };
 184
 185 static uint8_t sdl_keyevent_to_keycode(const SDL_KeyboardEvent *ev)
 186 {
 187     int keycode;
 188
 189     keycode = ev->keysym.scancode;
 190
 191     if (keycode < 9) {
 192         keycode = 0;
 193     } else if (keycode < 97) {
 194         keycode -= 8; /* just an offset */
 195     } else if (keycode < 158) {
 196         /* use conversion table */
 197         keycode = x_keycode_to_pc_keycode[keycode - 97];
 198     } else {
 199         keycode = 0;
 200     }
 201     return keycode;
 202 }
 203
 204 #endif
 205
 206 static void reset_keys(void)
 207 {
 208     int i;
 209     for(i = 0; i < 256; i++) {
 210         if (modifiers_state[i]) {
 211             if (i & 0x80)
 212                 kbd_put_keycode(0xe0);
 213             kbd_put_keycode(i | 0x80);
 214             modifiers_state[i] = 0;
 215         }
 216     }
 217 }
 218
 219 static void sdl_process_key(SDL_KeyboardEvent *ev)
 220 {
 221     int keycode, v;
 222
 223     if (ev->keysym.sym == SDLK_PAUSE) {
 224         /* specific case */
 225         v = 0;
 226         if (ev->type == SDL_KEYUP)
 227             v |= 0x80;
 228         kbd_put_keycode(0xe1);
 229         kbd_put_keycode(0x1d | v);
 230         kbd_put_keycode(0x45 | v);
 231         return;
 232     }
 233
 234     if (kbd_layout) {
 235         keycode = sdl_keyevent_to_keycode_generic(ev);
 236     } else {
 237         keycode = sdl_keyevent_to_keycode(ev);
 238     }
 239
 240     switch(keycode) {
 241     case 0x00:
 242         /* sent when leaving window: reset the modifiers state */
 243         reset_keys();
 244         return;
 245     case 0x2a:                          /* Left Shift */
 246     case 0x36:                          /* Right Shift */
 247     case 0x1d:                          /* Left CTRL */
 248     case 0x9d:                          /* Right CTRL */
 249     case 0x38:                          /* Left ALT */
 250     case 0xb8:                         /* Right ALT */
 251         if (ev->type == SDL_KEYUP)
 252             modifiers_state[keycode] = 0;
 253         else
 254             modifiers_state[keycode] = 1;
 255         break;
 256     case 0x45: /* num lock */
 257     case 0x3a: /* caps lock */
 258         /* SDL does not send the key up event, so we generate it */
 259         kbd_put_keycode(keycode);
 260         kbd_put_keycode(keycode | 0x80);
 261         return;
 262     }
 263
 264     /* now send the key code */
 265     if (keycode & 0x80)
 266         kbd_put_keycode(0xe0);
 267     if (ev->type == SDL_KEYUP)
 268         kbd_put_keycode(keycode | 0x80);
 269     else
 270         kbd_put_keycode(keycode & 0x7f);
 271 }
 272
 273 static void sdl_update_caption(void)
 274 {
 275     char buf[1024];
 276     strcpy(buf, "QEMU");
 277     if (!vm_running) {
 278         strcat(buf, " [Stopped]");
 279     }
 280     if (gui_grab) {
 281         strcat(buf, " - Press Ctrl-Alt to exit grab");
 282     }
 283     SDL_WM_SetCaption(buf, "QEMU");
 284 }
 285
 286 static void sdl_hide_cursor(void)
 287 {
 288     if (kbd_mouse_is_absolute()) {
 289         SDL_ShowCursor(1);
 290         SDL_SetCursor(sdl_cursor_hidden);
 291     } else {
 292         SDL_ShowCursor(0);
 293     }
 294 }
 295
 296 static void sdl_show_cursor(void)
 297 {
 298     if (!kbd_mouse_is_absolute()) {
 299         SDL_ShowCursor(1);
 300     }
 301 }
 302
 303 static void sdl_grab_start(void)
 304 {
 305     sdl_hide_cursor();
 306     SDL_WM_GrabInput(SDL_GRAB_ON);
 307     /* dummy read to avoid moving the mouse */
 308     SDL_GetRelativeMouseState(NULL, NULL);
 309     gui_grab = 1;
 310     sdl_update_caption();
 311 }
 312
 313 static void sdl_grab_end(void)
 314 {
 315     SDL_WM_GrabInput(SDL_GRAB_OFF);
 316     sdl_show_cursor();
 317     gui_grab = 0;
 318     sdl_update_caption();
 319 }
 320
 321 static void sdl_send_mouse_event(int dz)
 322 {
 323     int dx, dy, state, buttons;
 324     state = SDL_GetRelativeMouseState(&dx, &dy);
 325     buttons = 0;
 326     if (state & SDL_BUTTON(SDL_BUTTON_LEFT))
 327         buttons |= MOUSE_EVENT_LBUTTON;
 328     if (state & SDL_BUTTON(SDL_BUTTON_RIGHT))
 329         buttons |= MOUSE_EVENT_RBUTTON;
 330     if (state & SDL_BUTTON(SDL_BUTTON_MIDDLE))
 331         buttons |= MOUSE_EVENT_MBUTTON;
 332
 333     if (kbd_mouse_is_absolute()) {
 334         if (!absolute_enabled) {
 335             sdl_hide_cursor();
 336             if (gui_grab) {
 337                 sdl_grab_end();
 338             }
 339             absolute_enabled = 1;
 340         }
 341
 342         SDL_GetMouseState(&dx, &dy);
 343         dx = dx * 0x7FFF / width;
 344         dy = dy * 0x7FFF / height;
 345     }
 346
 347     kbd_mouse_event(dx, dy, dz, buttons);
 348 }
 349
 350 static void toggle_full_screen(DisplayState *ds)
 351 {
 352     gui_fullscreen = !gui_fullscreen;
 353     sdl_resize(ds, screen->w, screen->h);
 354     if (gui_fullscreen) {
 355         gui_saved_grab = gui_grab;
 356         sdl_grab_start();
 357     } else {
 358         if (!gui_saved_grab)
 359             sdl_grab_end();
 360     }
 361     vga_hw_invalidate();
 362     vga_hw_update();
 363 }
 364
 365 static void sdl_refresh(DisplayState *ds)
 366 {
 367     SDL_Event ev1, *ev = &ev1;
 368     int mod_state;
 369
 370     if (last_vm_running != vm_running) {
 371         last_vm_running = vm_running;
 372         sdl_update_caption();
 373     }
 374
 375     vga_hw_update();
 376
 377     while (SDL_PollEvent(ev)) {
 378         switch (ev->type) {
 379         case SDL_VIDEOEXPOSE:
 380             sdl_update(ds, 0, 0, screen->w, screen->h);
 381             break;
 382         case SDL_KEYDOWN:
 383         case SDL_KEYUP:
 384             if (ev->type == SDL_KEYDOWN) {
 385                 mod_state = (SDL_GetModState() & gui_grab_code) ==
 386                     gui_grab_code;
 387                 gui_key_modifier_pressed = mod_state;
 388                 if (gui_key_modifier_pressed) {
 389                     int keycode;
 390                     keycode = sdl_keyevent_to_keycode(&ev->key);
 391                     switch(keycode) {
 392                     case 0x21: /* 'f' key on US keyboard */
 393                         toggle_full_screen(ds);
 394                         gui_keysym = 1;
 395                         break;
 396                     case 0x02 ... 0x0a: /* '1' to '9' keys */
 397                         /* Reset the modifiers sent to the current console */
 398                         reset_keys();
 399                         console_select(keycode - 0x02);
 400                         if (!is_graphic_console()) {
 401                             /* display grab if going to a text console */
 402                             if (gui_grab)
 403                                 sdl_grab_end();
 404                         }
 405                         gui_keysym = 1;
 406                         break;
 407                     default:
 408                         break;
 409                     }
 410                 } else if (!is_graphic_console()) {
 411                     int keysym;
 412                     keysym = 0;
 413                     if (ev->key.keysym.mod & (KMOD_LCTRL | KMOD_RCTRL)) {
 414                         switch(ev->key.keysym.sym) {
 415                         case SDLK_UP: keysym = QEMU_KEY_CTRL_UP; break;
 416                         case SDLK_DOWN: keysym = QEMU_KEY_CTRL_DOWN; break;
 417                         case SDLK_LEFT: keysym = QEMU_KEY_CTRL_LEFT; break;
 418                         case SDLK_RIGHT: keysym = QEMU_KEY_CTRL_RIGHT; break;
 419                         case SDLK_HOME: keysym = QEMU_KEY_CTRL_HOME; break;
 420                         case SDLK_END: keysym = QEMU_KEY_CTRL_END; break;
 421                         case SDLK_PAGEUP: keysym = QEMU_KEY_CTRL_PAGEUP; break;
 422                         case SDLK_PAGEDOWN: keysym = QEMU_KEY_CTRL_PAGEDOWN; break;
 423                         default: break;
 424                         }
 425                     } else {
 426                         switch(ev->key.keysym.sym) {
 427                         case SDLK_UP: keysym = QEMU_KEY_UP; break;
 428                         case SDLK_DOWN: keysym = QEMU_KEY_DOWN; break;
 429                         case SDLK_LEFT: keysym = QEMU_KEY_LEFT; break;
 430                         case SDLK_RIGHT: keysym = QEMU_KEY_RIGHT; break;
 431                         case SDLK_HOME: keysym = QEMU_KEY_HOME; break;
 432                         case SDLK_END: keysym = QEMU_KEY_END; break;
 433                         case SDLK_PAGEUP: keysym = QEMU_KEY_PAGEUP; break;
 434                         case SDLK_PAGEDOWN: keysym = QEMU_KEY_PAGEDOWN; break;
 435                         case SDLK_BACKSPACE: keysym = QEMU_KEY_BACKSPACE; break;                        case SDLK_DELETE: keysym = QEMU_KEY_DELETE; break;
 436                         default: break;
 437                         }
 438                     }
 439                     if (keysym) {
 440                         kbd_put_keysym(keysym);
 441                     } else if (ev->key.keysym.unicode != 0) {
 442                         kbd_put_keysym(ev->key.keysym.unicode);
 443                     }
 444                 }
 445             } else if (ev->type == SDL_KEYUP) {
 446                 mod_state = (ev->key.keysym.mod & gui_grab_code);
 447                 if (!mod_state) {
 448                     if (gui_key_modifier_pressed) {
 449                         gui_key_modifier_pressed = 0;
 450                         if (gui_keysym == 0) {
 451                             /* exit/enter grab if pressing Ctrl-Alt */
 452                             if (!gui_grab) {
 453                                 /* if the application is not active,
 454                                    do not try to enter grab state. It
 455                                    prevents
 456                                    'SDL_WM_GrabInput(SDL_GRAB_ON)'
 457                                    from blocking all the application
 458                                    (SDL bug). */
 459                                 if (SDL_GetAppState() & SDL_APPACTIVE)
 460                                     sdl_grab_start();
 461                             } else {
 462                                 sdl_grab_end();
 463                             }
 464                             /* SDL does not send back all the
 465                                modifiers key, so we must correct it */
 466                             reset_keys();
 467                             break;
 468                         }
 469                         gui_keysym = 0;
 470                     }
 471                 }
 472             }
 473             if (is_graphic_console() && !gui_keysym)
 474                 sdl_process_key(&ev->key);
 475             break;
 476         case SDL_QUIT:
 477             qemu_system_shutdown_request();
 478             break;
 479         case SDL_MOUSEMOTION:
 480             if (gui_grab || kbd_mouse_is_absolute()) {
 481                 sdl_send_mouse_event(0);
 482             }
 483             break;
 484         case SDL_MOUSEBUTTONDOWN:
 485         case SDL_MOUSEBUTTONUP:
 486             {
 487                 SDL_MouseButtonEvent *bev = &ev->button;
 488                 if (!gui_grab && !kbd_mouse_is_absolute()) {
 489                     if (ev->type == SDL_MOUSEBUTTONDOWN &&
 490                         (bev->state & SDL_BUTTON_LMASK)) {
 491                         /* start grabbing all events */
 492                         sdl_grab_start();
 493                     }
 494                 } else {
 495                     int dz;
 496                     dz = 0;
 497 #ifdef SDL_BUTTON_WHEELUP
 498                     if (bev->button == SDL_BUTTON_WHEELUP && ev->type == SDL_MOUSEBUTTONDOWN) {
 499                         dz = -1;
 500                     } else if (bev->button == SDL_BUTTON_WHEELDOWN && ev->type == SDL_MOUSEBUTTONDOWN) {
 501                         dz = 1;
 502                     }
 503 #endif
 504                     sdl_send_mouse_event(dz);
 505                 }
 506             }
 507             break;
 508         case SDL_ACTIVEEVENT:
 509             if (gui_grab && ev->active.state == SDL_APPINPUTFOCUS &&
 510                 !ev->active.gain && !gui_fullscreen_initial_grab) {
 511                 sdl_grab_end();
 512             }
 513             break;
 514         default:
 515             break;
 516         }
 517     }
 518 }
 519
 520 static void sdl_cleanup(void)
 521 {
 522     SDL_Quit();
 523 }
 524
 525 void sdl_display_init(DisplayState *ds, int full_screen)
 526 {
 527     int flags;
 528     uint8_t data = 0;
 529
 530 #if defined(__APPLE__)
 531     /* always use generic keymaps */
 532     if (!keyboard_layout)
 533         keyboard_layout = "en-us";
 534 #endif
 535     if(keyboard_layout) {
 536         kbd_layout = init_keyboard_layout(keyboard_layout);
 537         if (!kbd_layout)
 538             exit(1);
 539     }
 540
 541     flags = SDL_INIT_VIDEO | SDL_INIT_NOPARACHUTE;
 542     if (SDL_Init (flags)) {
 543         fprintf(stderr, "Could not initialize SDL - exiting\n");
 544         exit(1);
 545     }
 546 #ifndef _WIN32
 547     /* NOTE: we still want Ctrl-C to work, so we undo the SDL redirections */
 548     signal(SIGINT, SIG_DFL);
 549     signal(SIGQUIT, SIG_DFL);
 550 #endif
 551
 552     ds->dpy_update = sdl_update;
 553     ds->dpy_resize = sdl_resize;
 554     ds->dpy_refresh = sdl_refresh;
 555
 556     sdl_resize(ds, 640, 400);
 557     sdl_update_caption();
 558     SDL_EnableKeyRepeat(250, 50);
 559     SDL_EnableUNICODE(1);
 560     gui_grab = 0;
 561
 562     sdl_cursor_hidden = SDL_CreateCursor(&data, &data, 8, 1, 0, 0);
 563     sdl_cursor_normal = SDL_GetCursor();
 564
 565     atexit(sdl_cleanup);
 566     if (full_screen) {
 567         gui_fullscreen = 1;
 568         gui_fullscreen_initial_grab = 1;
 569         sdl_grab_start();
 570     }
 571 }