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