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