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 USE_KVM
 278     if (kvm_allowed) {
 279         strcat(buf, "/KVM");
 280     }
 281 #endif
 282     if (!vm_running) {
 283         strcat(buf, " [Stopped]");
 284     }
 285     if (gui_grab) {
 286         strcat(buf, " - Press Ctrl-Alt to exit grab");
 287     }
 288     SDL_WM_SetCaption(buf, "QEMU");
 289 }
 290
 291 static void sdl_hide_cursor(void)
 292 {
 293     if (kbd_mouse_is_absolute()) {
 294         SDL_ShowCursor(1);
 295         SDL_SetCursor(sdl_cursor_hidden);
 296     } else {
 297         SDL_ShowCursor(0);
 298     }
 299 }
 300
 301 static void sdl_show_cursor(void)
 302 {
 303     if (!kbd_mouse_is_absolute()) {
 304         SDL_ShowCursor(1);
 305     }
 306 }
 307
 308 static void sdl_grab_start(void)
 309 {
 310     sdl_hide_cursor();
 311     SDL_WM_GrabInput(SDL_GRAB_ON);
 312     /* dummy read to avoid moving the mouse */
 313     SDL_GetRelativeMouseState(NULL, NULL);
 314     gui_grab = 1;
 315     sdl_update_caption();
 316 }
 317
 318 static void sdl_grab_end(void)
 319 {
 320     SDL_WM_GrabInput(SDL_GRAB_OFF);
 321     sdl_show_cursor();
 322     gui_grab = 0;
 323     sdl_update_caption();
 324 }
 325
 326 static void sdl_send_mouse_event(int dz)
 327 {
 328     int dx, dy, state, buttons;
 329     state = SDL_GetRelativeMouseState(&dx, &dy);
 330     buttons = 0;
 331     if (state & SDL_BUTTON(SDL_BUTTON_LEFT))
 332         buttons |= MOUSE_EVENT_LBUTTON;
 333     if (state & SDL_BUTTON(SDL_BUTTON_RIGHT))
 334         buttons |= MOUSE_EVENT_RBUTTON;
 335     if (state & SDL_BUTTON(SDL_BUTTON_MIDDLE))
 336         buttons |= MOUSE_EVENT_MBUTTON;
 337
 338     if (kbd_mouse_is_absolute()) {
 339         if (!absolute_enabled) {
 340             sdl_hide_cursor();
 341             if (gui_grab) {
 342                 sdl_grab_end();
 343             }
 344             absolute_enabled = 1;
 345         }
 346
 347         SDL_GetMouseState(&dx, &dy);
 348         dx = dx * 0x7FFF / width;
 349         dy = dy * 0x7FFF / height;
 350     }
 351
 352     kbd_mouse_event(dx, dy, dz, buttons);
 353 }
 354
 355 static void toggle_full_screen(DisplayState *ds)
 356 {
 357     gui_fullscreen = !gui_fullscreen;
 358     sdl_resize(ds, screen->w, screen->h);
 359     if (gui_fullscreen) {
 360         gui_saved_grab = gui_grab;
 361         sdl_grab_start();
 362     } else {
 363         if (!gui_saved_grab)
 364             sdl_grab_end();
 365     }
 366     vga_hw_invalidate();
 367     vga_hw_update();
 368 }
 369
 370 static void sdl_refresh(DisplayState *ds)
 371 {
 372     SDL_Event ev1, *ev = &ev1;
 373     int mod_state;
 374
 375     if (last_vm_running != vm_running) {
 376         last_vm_running = vm_running;
 377         sdl_update_caption();
 378     }
 379
 380     vga_hw_update();
 381
 382     while (SDL_PollEvent(ev)) {
 383         switch (ev->type) {
 384         case SDL_VIDEOEXPOSE:
 385             sdl_update(ds, 0, 0, screen->w, screen->h);
 386             break;
 387         case SDL_KEYDOWN:
 388         case SDL_KEYUP:
 389             if (ev->type == SDL_KEYDOWN) {
 390                 mod_state = (SDL_GetModState() & gui_grab_code) ==
 391                     gui_grab_code;
 392                 gui_key_modifier_pressed = mod_state;
 393                 if (gui_key_modifier_pressed) {
 394                     int keycode;
 395                     keycode = sdl_keyevent_to_keycode(&ev->key);
 396                     switch(keycode) {
 397                     case 0x21: /* 'f' key on US keyboard */
 398                         toggle_full_screen(ds);
 399                         gui_keysym = 1;
 400                         break;
 401                     case 0x02 ... 0x0a: /* '1' to '9' keys */
 402                         console_select(keycode - 0x02);
 403                         if (!is_graphic_console()) {
 404                             /* display grab if going to a text console */
 405                             if (gui_grab)
 406                                 sdl_grab_end();
 407                         }
 408                         gui_keysym = 1;
 409                         break;
 410                     default:
 411                         break;
 412                     }
 413                 } else if (!is_graphic_console()) {
 414                     int keysym;
 415                     keysym = 0;
 416                     if (ev->key.keysym.mod & (KMOD_LCTRL | KMOD_RCTRL)) {
 417                         switch(ev->key.keysym.sym) {
 418                         case SDLK_UP: keysym = QEMU_KEY_CTRL_UP; break;
 419                         case SDLK_DOWN: keysym = QEMU_KEY_CTRL_DOWN; break;
 420                         case SDLK_LEFT: keysym = QEMU_KEY_CTRL_LEFT; break;
 421                         case SDLK_RIGHT: keysym = QEMU_KEY_CTRL_RIGHT; break;
 422                         case SDLK_HOME: keysym = QEMU_KEY_CTRL_HOME; break;
 423                         case SDLK_END: keysym = QEMU_KEY_CTRL_END; break;
 424                         case SDLK_PAGEUP: keysym = QEMU_KEY_CTRL_PAGEUP; break;
 425                         case SDLK_PAGEDOWN: keysym = QEMU_KEY_CTRL_PAGEDOWN; break;
 426                         default: break;
 427                         }
 428                     } else {
 429                         switch(ev->key.keysym.sym) {
 430                         case SDLK_UP: keysym = QEMU_KEY_UP; break;
 431                         case SDLK_DOWN: keysym = QEMU_KEY_DOWN; break;
 432                         case SDLK_LEFT: keysym = QEMU_KEY_LEFT; break;
 433                         case SDLK_RIGHT: keysym = QEMU_KEY_RIGHT; break;
 434                         case SDLK_HOME: keysym = QEMU_KEY_HOME; break;
 435                         case SDLK_END: keysym = QEMU_KEY_END; break;
 436                         case SDLK_PAGEUP: keysym = QEMU_KEY_PAGEUP; break;
 437                         case SDLK_PAGEDOWN: keysym = QEMU_KEY_PAGEDOWN; break;
 438                         case SDLK_BACKSPACE: keysym = QEMU_KEY_BACKSPACE; break;                        case SDLK_DELETE: keysym = QEMU_KEY_DELETE; break;
 439                         default: break;
 440                         }
 441                     }
 442                     if (keysym) {
 443                         kbd_put_keysym(keysym);
 444                     } else if (ev->key.keysym.unicode != 0) {
 445                         kbd_put_keysym(ev->key.keysym.unicode);
 446                     }
 447                 }
 448             } else if (ev->type == SDL_KEYUP) {
 449                 mod_state = (ev->key.keysym.mod & gui_grab_code);
 450                 if (!mod_state) {
 451                     if (gui_key_modifier_pressed) {
 452                         gui_key_modifier_pressed = 0;
 453                         if (gui_keysym == 0) {
 454                             /* exit/enter grab if pressing Ctrl-Alt */
 455                             if (!gui_grab) {
 456                                 /* if the application is not active,
 457                                    do not try to enter grab state. It
 458                                    prevents
 459                                    'SDL_WM_GrabInput(SDL_GRAB_ON)'
 460                                    from blocking all the application
 461                                    (SDL bug). */
 462                                 if (SDL_GetAppState() & SDL_APPACTIVE)
 463                                     sdl_grab_start();
 464                             } else {
 465                                 sdl_grab_end();
 466                             }
 467                             /* SDL does not send back all the
 468                                modifiers key, so we must correct it */
 469                             reset_keys();
 470                             break;
 471                         }
 472                         gui_keysym = 0;
 473                     }
 474                 }
 475             }
 476             if (is_graphic_console())
 477                 sdl_process_key(&ev->key);
 478             break;
 479         case SDL_QUIT:
 480             qemu_system_shutdown_request();
 481             break;
 482         case SDL_MOUSEMOTION:
 483             if (gui_grab || kbd_mouse_is_absolute()) {
 484                 sdl_send_mouse_event(0);
 485             }
 486             break;
 487         case SDL_MOUSEBUTTONDOWN:
 488         case SDL_MOUSEBUTTONUP:
 489             {
 490                 SDL_MouseButtonEvent *bev = &ev->button;
 491                 if (!gui_grab && !kbd_mouse_is_absolute()) {
 492                     if (ev->type == SDL_MOUSEBUTTONDOWN &&
 493                         (bev->state & SDL_BUTTON_LMASK)) {
 494                         /* start grabbing all events */
 495                         sdl_grab_start();
 496                     }
 497                 } else {
 498                     int dz;
 499                     dz = 0;
 500 #ifdef SDL_BUTTON_WHEELUP
 501                     if (bev->button == SDL_BUTTON_WHEELUP && ev->type == SDL_MOUSEBUTTONDOWN) {
 502                         dz = -1;
 503                     } else if (bev->button == SDL_BUTTON_WHEELDOWN && ev->type == SDL_MOUSEBUTTONDOWN) {
 504                         dz = 1;
 505                     }
 506 #endif
 507                     sdl_send_mouse_event(dz);
 508                 }
 509             }
 510             break;
 511         case SDL_ACTIVEEVENT:
 512             if (gui_grab && ev->active.state == SDL_APPINPUTFOCUS &&
 513                 !ev->active.gain && !gui_fullscreen_initial_grab) {
 514                 sdl_grab_end();
 515             }
 516             break;
 517         default:
 518             break;
 519         }
 520     }
 521 }
 522
 523 static void sdl_cleanup(void)
 524 {
 525     SDL_Quit();
 526 }
 527
 528 void sdl_display_init(DisplayState *ds, int full_screen)
 529 {
 530     int flags;
 531     uint8_t data = 0;
 532
 533 #if defined(__APPLE__)
 534     /* always use generic keymaps */
 535     if (!keyboard_layout)
 536         keyboard_layout = "en-us";
 537 #endif
 538     if(keyboard_layout) {
 539         kbd_layout = init_keyboard_layout(keyboard_layout);
 540         if (!kbd_layout)
 541             exit(1);
 542     }
 543
 544     flags = SDL_INIT_VIDEO | SDL_INIT_NOPARACHUTE;
 545     if (SDL_Init (flags)) {
 546         fprintf(stderr, "Could not initialize SDL - exiting\n");
 547         exit(1);
 548     }
 549 #ifndef _WIN32
 550     /* NOTE: we still want Ctrl-C to work, so we undo the SDL redirections */
 551     signal(SIGINT, SIG_DFL);
 552     signal(SIGQUIT, SIG_DFL);
 553 #endif
 554
 555     ds->dpy_update = sdl_update;
 556     ds->dpy_resize = sdl_resize;
 557     ds->dpy_refresh = sdl_refresh;
 558
 559     sdl_resize(ds, 640, 400);
 560     sdl_update_caption();
 561     SDL_EnableKeyRepeat(250, 50);
 562     SDL_EnableUNICODE(1);
 563     gui_grab = 0;
 564
 565     sdl_cursor_hidden = SDL_CreateCursor(&data, &data, 8, 1, 0, 0);
 566     sdl_cursor_normal = SDL_GetCursor();
 567
 568     atexit(sdl_cleanup);
 569     if (full_screen) {
 570         gui_fullscreen = 1;
 571         gui_fullscreen_initial_grab = 1;
 572         sdl_grab_start();
 573     }
 574 }