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     /* For Japanese key '\' and '|' */
 108     if (keysym == 92 && ev->keysym.scancode == 133) {
 109         keysym = 0xa5;
 110     }
 111     return keysym2scancode(kbd_layout, keysym);
 112 }
 113
 114 /* specific keyboard conversions from scan codes */
 115
 116 #if defined(_WIN32)
 117
 118 static uint8_t sdl_keyevent_to_keycode(const SDL_KeyboardEvent *ev)
 119 {
 120     return ev->keysym.scancode;
 121 }
 122
 123 #else
 124
 125 static uint8_t sdl_keyevent_to_keycode(const SDL_KeyboardEvent *ev)
 126 {
 127     int keycode;
 128
 129     keycode = ev->keysym.scancode;
 130
 131     if (keycode < 9) {
 132         keycode = 0;
 133     } else if (keycode < 97) {
 134         keycode -= 8; /* just an offset */
 135     } else if (keycode < 212) {
 136         /* use conversion table */
 137         keycode = _translate_keycode(keycode - 97);
 138     } else {
 139         keycode = 0;
 140     }
 141     return keycode;
 142 }
 143
 144 #endif
 145
 146 static void reset_keys(void)
 147 {
 148     int i;
 149     for(i = 0; i < 256; i++) {
 150         if (modifiers_state[i]) {
 151             if (i & 0x80)
 152                 kbd_put_keycode(0xe0);
 153             kbd_put_keycode(i | 0x80);
 154             modifiers_state[i] = 0;
 155         }
 156     }
 157 }
 158
 159 static void sdl_process_key(SDL_KeyboardEvent *ev)
 160 {
 161     int keycode, v;
 162
 163     if (ev->keysym.sym == SDLK_PAUSE) {
 164         /* specific case */
 165         v = 0;
 166         if (ev->type == SDL_KEYUP)
 167             v |= 0x80;
 168         kbd_put_keycode(0xe1);
 169         kbd_put_keycode(0x1d | v);
 170         kbd_put_keycode(0x45 | v);
 171         return;
 172     }
 173
 174     if (kbd_layout) {
 175         keycode = sdl_keyevent_to_keycode_generic(ev);
 176     } else {
 177         keycode = sdl_keyevent_to_keycode(ev);
 178     }
 179
 180     switch(keycode) {
 181     case 0x00:
 182         /* sent when leaving window: reset the modifiers state */
 183         reset_keys();
 184         return;
 185     case 0x2a:                          /* Left Shift */
 186     case 0x36:                          /* Right Shift */
 187     case 0x1d:                          /* Left CTRL */
 188     case 0x9d:                          /* Right CTRL */
 189     case 0x38:                          /* Left ALT */
 190     case 0xb8:                         /* Right ALT */
 191         if (ev->type == SDL_KEYUP)
 192             modifiers_state[keycode] = 0;
 193         else
 194             modifiers_state[keycode] = 1;
 195         break;
 196     case 0x45: /* num lock */
 197     case 0x3a: /* caps lock */
 198         /* SDL does not send the key up event, so we generate it */
 199         kbd_put_keycode(keycode);
 200         kbd_put_keycode(keycode | 0x80);
 201         return;
 202     }
 203
 204     /* now send the key code */
 205     if (keycode & 0x80)
 206         kbd_put_keycode(0xe0);
 207     if (ev->type == SDL_KEYUP)
 208         kbd_put_keycode(keycode | 0x80);
 209     else
 210         kbd_put_keycode(keycode & 0x7f);
 211 }
 212
 213 static void sdl_update_caption(void)
 214 {
 215     char buf[1024];
 216     strcpy(buf, "QEMU");
 217     if (!vm_running) {
 218         strcat(buf, " [Stopped]");
 219     }
 220     if (gui_grab) {
 221         strcat(buf, " - Press Ctrl-Alt to exit grab");
 222     }
 223     SDL_WM_SetCaption(buf, "QEMU");
 224 }
 225
 226 static void sdl_hide_cursor(void)
 227 {
 228     if (kbd_mouse_is_absolute()) {
 229         SDL_ShowCursor(1);
 230         SDL_SetCursor(sdl_cursor_hidden);
 231     } else {
 232         SDL_ShowCursor(0);
 233     }
 234 }
 235
 236 static void sdl_show_cursor(void)
 237 {
 238     if (!kbd_mouse_is_absolute()) {
 239         SDL_ShowCursor(1);
 240         SDL_SetCursor(sdl_cursor_normal);
 241     }
 242 }
 243
 244 static void sdl_grab_start(void)
 245 {
 246     sdl_hide_cursor();
 247     SDL_WM_GrabInput(SDL_GRAB_ON);
 248     /* dummy read to avoid moving the mouse */
 249     SDL_GetRelativeMouseState(NULL, NULL);
 250     gui_grab = 1;
 251     sdl_update_caption();
 252 }
 253
 254 static void sdl_grab_end(void)
 255 {
 256     SDL_WM_GrabInput(SDL_GRAB_OFF);
 257     sdl_show_cursor();
 258     gui_grab = 0;
 259     sdl_update_caption();
 260 }
 261
 262 static void sdl_send_mouse_event(int dz)
 263 {
 264     int dx, dy, state, buttons;
 265     state = SDL_GetRelativeMouseState(&dx, &dy);
 266     buttons = 0;
 267     if (state & SDL_BUTTON(SDL_BUTTON_LEFT))
 268         buttons |= MOUSE_EVENT_LBUTTON;
 269     if (state & SDL_BUTTON(SDL_BUTTON_RIGHT))
 270         buttons |= MOUSE_EVENT_RBUTTON;
 271     if (state & SDL_BUTTON(SDL_BUTTON_MIDDLE))
 272         buttons |= MOUSE_EVENT_MBUTTON;
 273
 274     if (kbd_mouse_is_absolute()) {
 275         if (!absolute_enabled) {
 276             sdl_hide_cursor();
 277             if (gui_grab) {
 278                 sdl_grab_end();
 279             }
 280             absolute_enabled = 1;
 281         }
 282
 283         SDL_GetMouseState(&dx, &dy);
 284         dx = dx * 0x7FFF / width;
 285         dy = dy * 0x7FFF / height;
 286     } else if (absolute_enabled) {
 287         sdl_show_cursor();
 288         absolute_enabled = 0;
 289     }
 290
 291     kbd_mouse_event(dx, dy, dz, buttons);
 292 }
 293
 294 static void toggle_full_screen(DisplayState *ds)
 295 {
 296     gui_fullscreen = !gui_fullscreen;
 297     sdl_resize(ds, screen->w, screen->h);
 298     if (gui_fullscreen) {
 299         gui_saved_grab = gui_grab;
 300         sdl_grab_start();
 301     } else {
 302         if (!gui_saved_grab)
 303             sdl_grab_end();
 304     }
 305     vga_hw_invalidate();
 306     vga_hw_update();
 307 }
 308
 309 static void sdl_refresh(DisplayState *ds)
 310 {
 311     SDL_Event ev1, *ev = &ev1;
 312     int mod_state;
 313
 314     if (last_vm_running != vm_running) {
 315         last_vm_running = vm_running;
 316         sdl_update_caption();
 317     }
 318
 319     vga_hw_update();
 320
 321     while (SDL_PollEvent(ev)) {
 322         switch (ev->type) {
 323         case SDL_VIDEOEXPOSE:
 324             sdl_update(ds, 0, 0, screen->w, screen->h);
 325             break;
 326         case SDL_KEYDOWN:
 327         case SDL_KEYUP:
 328             if (ev->type == SDL_KEYDOWN) {
 329                 mod_state = (SDL_GetModState() & gui_grab_code) ==
 330                     gui_grab_code;
 331                 gui_key_modifier_pressed = mod_state;
 332                 if (gui_key_modifier_pressed) {
 333                     int keycode;
 334                     keycode = sdl_keyevent_to_keycode(&ev->key);
 335                     switch(keycode) {
 336                     case 0x21: /* 'f' key on US keyboard */
 337                         toggle_full_screen(ds);
 338                         gui_keysym = 1;
 339                         break;
 340                     case 0x02 ... 0x0a: /* '1' to '9' keys */
 341                         /* Reset the modifiers sent to the current console */
 342                         reset_keys();
 343                         console_select(keycode - 0x02);
 344                         if (!is_graphic_console()) {
 345                             /* display grab if going to a text console */
 346                             if (gui_grab)
 347                                 sdl_grab_end();
 348                         }
 349                         gui_keysym = 1;
 350                         break;
 351                     default:
 352                         break;
 353                     }
 354                 } else if (!is_graphic_console()) {
 355                     int keysym;
 356                     keysym = 0;
 357                     if (ev->key.keysym.mod & (KMOD_LCTRL | KMOD_RCTRL)) {
 358                         switch(ev->key.keysym.sym) {
 359                         case SDLK_UP: keysym = QEMU_KEY_CTRL_UP; break;
 360                         case SDLK_DOWN: keysym = QEMU_KEY_CTRL_DOWN; break;
 361                         case SDLK_LEFT: keysym = QEMU_KEY_CTRL_LEFT; break;
 362                         case SDLK_RIGHT: keysym = QEMU_KEY_CTRL_RIGHT; break;
 363                         case SDLK_HOME: keysym = QEMU_KEY_CTRL_HOME; break;
 364                         case SDLK_END: keysym = QEMU_KEY_CTRL_END; break;
 365                         case SDLK_PAGEUP: keysym = QEMU_KEY_CTRL_PAGEUP; break;
 366                         case SDLK_PAGEDOWN: keysym = QEMU_KEY_CTRL_PAGEDOWN; break;
 367                         default: break;
 368                         }
 369                     } else {
 370                         switch(ev->key.keysym.sym) {
 371                         case SDLK_UP: keysym = QEMU_KEY_UP; break;
 372                         case SDLK_DOWN: keysym = QEMU_KEY_DOWN; break;
 373                         case SDLK_LEFT: keysym = QEMU_KEY_LEFT; break;
 374                         case SDLK_RIGHT: keysym = QEMU_KEY_RIGHT; break;
 375                         case SDLK_HOME: keysym = QEMU_KEY_HOME; break;
 376                         case SDLK_END: keysym = QEMU_KEY_END; break;
 377                         case SDLK_PAGEUP: keysym = QEMU_KEY_PAGEUP; break;
 378                         case SDLK_PAGEDOWN: keysym = QEMU_KEY_PAGEDOWN; break;
 379                         case SDLK_BACKSPACE: keysym = QEMU_KEY_BACKSPACE; break;                        case SDLK_DELETE: keysym = QEMU_KEY_DELETE; break;
 380                         default: break;
 381                         }
 382                     }
 383                     if (keysym) {
 384                         kbd_put_keysym(keysym);
 385                     } else if (ev->key.keysym.unicode != 0) {
 386                         kbd_put_keysym(ev->key.keysym.unicode);
 387                     }
 388                 }
 389             } else if (ev->type == SDL_KEYUP) {
 390                 mod_state = (ev->key.keysym.mod & gui_grab_code);
 391                 if (!mod_state) {
 392                     if (gui_key_modifier_pressed) {
 393                         gui_key_modifier_pressed = 0;
 394                         if (gui_keysym == 0) {
 395                             /* exit/enter grab if pressing Ctrl-Alt */
 396                             if (!gui_grab) {
 397                                 /* if the application is not active,
 398                                    do not try to enter grab state. It
 399                                    prevents
 400                                    'SDL_WM_GrabInput(SDL_GRAB_ON)'
 401                                    from blocking all the application
 402                                    (SDL bug). */
 403                                 if (SDL_GetAppState() & SDL_APPACTIVE)
 404                                     sdl_grab_start();
 405                             } else {
 406                                 sdl_grab_end();
 407                             }
 408                             /* SDL does not send back all the
 409                                modifiers key, so we must correct it */
 410                             reset_keys();
 411                             break;
 412                         }
 413                         gui_keysym = 0;
 414                     }
 415                 }
 416             }
 417             if (is_graphic_console() && !gui_keysym)
 418                 sdl_process_key(&ev->key);
 419             break;
 420         case SDL_QUIT:
 421             if (!no_quit) {
 422                qemu_system_shutdown_request();
 423             }
 424             break;
 425         case SDL_MOUSEMOTION:
 426             if (gui_grab || kbd_mouse_is_absolute() ||
 427                 absolute_enabled) {
 428                 sdl_send_mouse_event(0);
 429             }
 430             break;
 431         case SDL_MOUSEBUTTONDOWN:
 432         case SDL_MOUSEBUTTONUP:
 433             {
 434                 SDL_MouseButtonEvent *bev = &ev->button;
 435                 if (!gui_grab && !kbd_mouse_is_absolute()) {
 436                     if (ev->type == SDL_MOUSEBUTTONDOWN &&
 437                         (bev->state & SDL_BUTTON_LMASK)) {
 438                         /* start grabbing all events */
 439                         sdl_grab_start();
 440                     }
 441                 } else {
 442                     int dz;
 443                     dz = 0;
 444 #ifdef SDL_BUTTON_WHEELUP
 445                     if (bev->button == SDL_BUTTON_WHEELUP && ev->type == SDL_MOUSEBUTTONDOWN) {
 446                         dz = -1;
 447                     } else if (bev->button == SDL_BUTTON_WHEELDOWN && ev->type == SDL_MOUSEBUTTONDOWN) {
 448                         dz = 1;
 449                     }
 450 #endif
 451                     sdl_send_mouse_event(dz);
 452                 }
 453             }
 454             break;
 455         case SDL_ACTIVEEVENT:
 456             if (gui_grab && ev->active.state == SDL_APPINPUTFOCUS &&
 457                 !ev->active.gain && !gui_fullscreen_initial_grab) {
 458                 sdl_grab_end();
 459             }
 460             break;
 461         default:
 462             break;
 463         }
 464     }
 465 }
 466
 467 static void sdl_cleanup(void)
 468 {
 469     SDL_Quit();
 470 }
 471
 472 void sdl_display_init(DisplayState *ds, int full_screen)
 473 {
 474     int flags;
 475     uint8_t data = 0;
 476
 477 #if defined(__APPLE__)
 478     /* always use generic keymaps */
 479     if (!keyboard_layout)
 480         keyboard_layout = "en-us";
 481 #endif
 482     if(keyboard_layout) {
 483         kbd_layout = init_keyboard_layout(keyboard_layout);
 484         if (!kbd_layout)
 485             exit(1);
 486     }
 487
 488     flags = SDL_INIT_VIDEO | SDL_INIT_NOPARACHUTE;
 489     if (SDL_Init (flags)) {
 490         fprintf(stderr, "Could not initialize SDL - exiting\n");
 491         exit(1);
 492     }
 493 #ifndef _WIN32
 494     /* NOTE: we still want Ctrl-C to work, so we undo the SDL redirections */
 495     signal(SIGINT, SIG_DFL);
 496     signal(SIGQUIT, SIG_DFL);
 497 #endif
 498
 499     ds->dpy_update = sdl_update;
 500     ds->dpy_resize = sdl_resize;
 501     ds->dpy_refresh = sdl_refresh;
 502
 503     sdl_resize(ds, 640, 400);
 504     sdl_update_caption();
 505     SDL_EnableKeyRepeat(250, 50);
 506     SDL_EnableUNICODE(1);
 507     gui_grab = 0;
 508
 509     sdl_cursor_hidden = SDL_CreateCursor(&data, &data, 8, 1, 0, 0);
 510     sdl_cursor_normal = SDL_GetCursor();
 511
 512     atexit(sdl_cleanup);
 513     if (full_screen) {
 514         gui_fullscreen = 1;
 515         gui_fullscreen_initial_grab = 1;
 516         sdl_grab_start();
 517     }
 518 }