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_noframe;
  38 static int gui_key_modifier_pressed;
  39 static int gui_keysym;
  40 static int gui_fullscreen_initial_grab;
  41 static int gui_grab_code = KMOD_LALT | KMOD_LCTRL;
  42 static uint8_t modifiers_state[256];
  43 static int width, height;
  44 static SDL_Cursor *sdl_cursor_normal;
  45 static SDL_Cursor *sdl_cursor_hidden;
  46 static int absolute_enabled = 0;
  47
  48 static void sdl_update(DisplayState *ds, int x, int y, int w, int h)
  49 {
  50     //    printf("updating x=%d y=%d w=%d h=%d\n", x, y, w, h);
  51     SDL_UpdateRect(screen, x, y, w, h);
  52 }
  53
  54 static void sdl_resize(DisplayState *ds, int w, int h)
  55 {
  56     int flags;
  57
  58     //    printf("resizing to %d %d\n", w, h);
  59
  60     flags = SDL_HWSURFACE|SDL_ASYNCBLIT|SDL_HWACCEL;
  61     if (gui_fullscreen)
  62         flags |= SDL_FULLSCREEN;
  63     if (gui_noframe)
  64         flags |= SDL_NOFRAME;
  65
  66     width = w;
  67     height = h;
  68
  69  again:
  70     screen = SDL_SetVideoMode(w, h, 0, flags);
  71     if (!screen) {
  72         fprintf(stderr, "Could not open SDL display\n");
  73         exit(1);
  74     }
  75     if (!screen->pixels && (flags & SDL_HWSURFACE) && (flags & SDL_FULLSCREEN)) {
  76         flags &= ~SDL_HWSURFACE;
  77         goto again;
  78     }
  79
  80     if (!screen->pixels) {
  81         fprintf(stderr, "Could not open SDL display\n");
  82         exit(1);
  83     }
  84     ds->data = screen->pixels;
  85     ds->linesize = screen->pitch;
  86     ds->depth = screen->format->BitsPerPixel;
  87     if (ds->depth == 32 && screen->format->Rshift == 0) {
  88         ds->bgr = 1;
  89     } else {
  90         ds->bgr = 0;
  91     }
  92     ds->width = w;
  93     ds->height = h;
  94 }
  95
  96 /* generic keyboard conversion */
  97
  98 #include "sdl_keysym.h"
  99 #include "keymaps.c"
 100
 101 static kbd_layout_t *kbd_layout = NULL;
 102
 103 static uint8_t sdl_keyevent_to_keycode_generic(const SDL_KeyboardEvent *ev)
 104 {
 105     int keysym;
 106     /* workaround for X11+SDL bug with AltGR */
 107     keysym = ev->keysym.sym;
 108     if (keysym == 0 && ev->keysym.scancode == 113)
 109         keysym = SDLK_MODE;
 110     /* For Japanese key '\' and '|' */
 111     if (keysym == 92 && ev->keysym.scancode == 133) {
 112         keysym = 0xa5;
 113     }
 114     return keysym2scancode(kbd_layout, keysym);
 115 }
 116
 117 /* specific keyboard conversions from scan codes */
 118
 119 #if defined(_WIN32)
 120
 121 static uint8_t sdl_keyevent_to_keycode(const SDL_KeyboardEvent *ev)
 122 {
 123     return ev->keysym.scancode;
 124 }
 125
 126 #else
 127
 128 static uint8_t sdl_keyevent_to_keycode(const SDL_KeyboardEvent *ev)
 129 {
 130     int keycode;
 131
 132     keycode = ev->keysym.scancode;
 133
 134     if (keycode < 9) {
 135         keycode = 0;
 136     } else if (keycode < 97) {
 137         keycode -= 8; /* just an offset */
 138     } else if (keycode < 212) {
 139         /* use conversion table */
 140         keycode = _translate_keycode(keycode - 97);
 141     } else {
 142         keycode = 0;
 143     }
 144     return keycode;
 145 }
 146
 147 #endif
 148
 149 static void reset_keys(void)
 150 {
 151     int i;
 152     for(i = 0; i < 256; i++) {
 153         if (modifiers_state[i]) {
 154             if (i & 0x80)
 155                 kbd_put_keycode(0xe0);
 156             kbd_put_keycode(i | 0x80);
 157             modifiers_state[i] = 0;
 158         }
 159     }
 160 }
 161
 162 static void sdl_process_key(SDL_KeyboardEvent *ev)
 163 {
 164     int keycode, v;
 165
 166     if (ev->keysym.sym == SDLK_PAUSE) {
 167         /* specific case */
 168         v = 0;
 169         if (ev->type == SDL_KEYUP)
 170             v |= 0x80;
 171         kbd_put_keycode(0xe1);
 172         kbd_put_keycode(0x1d | v);
 173         kbd_put_keycode(0x45 | v);
 174         return;
 175     }
 176
 177     if (kbd_layout) {
 178         keycode = sdl_keyevent_to_keycode_generic(ev);
 179     } else {
 180         keycode = sdl_keyevent_to_keycode(ev);
 181     }
 182
 183     switch(keycode) {
 184     case 0x00:
 185         /* sent when leaving window: reset the modifiers state */
 186         reset_keys();
 187         return;
 188     case 0x2a:                          /* Left Shift */
 189     case 0x36:                          /* Right Shift */
 190     case 0x1d:                          /* Left CTRL */
 191     case 0x9d:                          /* Right CTRL */
 192     case 0x38:                          /* Left ALT */
 193     case 0xb8:                         /* Right ALT */
 194         if (ev->type == SDL_KEYUP)
 195             modifiers_state[keycode] = 0;
 196         else
 197             modifiers_state[keycode] = 1;
 198         break;
 199     case 0x45: /* num lock */
 200     case 0x3a: /* caps lock */
 201         /* SDL does not send the key up event, so we generate it */
 202         kbd_put_keycode(keycode);
 203         kbd_put_keycode(keycode | 0x80);
 204         return;
 205     }
 206
 207     /* now send the key code */
 208     if (keycode & 0x80)
 209         kbd_put_keycode(0xe0);
 210     if (ev->type == SDL_KEYUP)
 211         kbd_put_keycode(keycode | 0x80);
 212     else
 213         kbd_put_keycode(keycode & 0x7f);
 214 }
 215
 216 static void sdl_update_caption(void)
 217 {
 218     char buf[1024];
 219     strcpy(buf, "QEMU");
 220     if (!vm_running) {
 221         strcat(buf, " [Stopped]");
 222     }
 223     if (gui_grab) {
 224         strcat(buf, " - Press Ctrl-Alt to exit grab");
 225     }
 226     SDL_WM_SetCaption(buf, "QEMU");
 227 }
 228
 229 static void sdl_hide_cursor(void)
 230 {
 231     if (kbd_mouse_is_absolute()) {
 232         SDL_ShowCursor(1);
 233         SDL_SetCursor(sdl_cursor_hidden);
 234     } else {
 235         SDL_ShowCursor(0);
 236     }
 237 }
 238
 239 static void sdl_show_cursor(void)
 240 {
 241     if (!kbd_mouse_is_absolute()) {
 242         SDL_ShowCursor(1);
 243         SDL_SetCursor(sdl_cursor_normal);
 244     }
 245 }
 246
 247 static void sdl_grab_start(void)
 248 {
 249     sdl_hide_cursor();
 250     SDL_WM_GrabInput(SDL_GRAB_ON);
 251     /* dummy read to avoid moving the mouse */
 252     SDL_GetRelativeMouseState(NULL, NULL);
 253     gui_grab = 1;
 254     sdl_update_caption();
 255 }
 256
 257 static void sdl_grab_end(void)
 258 {
 259     SDL_WM_GrabInput(SDL_GRAB_OFF);
 260     sdl_show_cursor();
 261     gui_grab = 0;
 262     sdl_update_caption();
 263 }
 264
 265 static void sdl_send_mouse_event(int dz)
 266 {
 267     int dx, dy, state, buttons;
 268     state = SDL_GetRelativeMouseState(&dx, &dy);
 269     buttons = 0;
 270     if (state & SDL_BUTTON(SDL_BUTTON_LEFT))
 271         buttons |= MOUSE_EVENT_LBUTTON;
 272     if (state & SDL_BUTTON(SDL_BUTTON_RIGHT))
 273         buttons |= MOUSE_EVENT_RBUTTON;
 274     if (state & SDL_BUTTON(SDL_BUTTON_MIDDLE))
 275         buttons |= MOUSE_EVENT_MBUTTON;
 276
 277     if (kbd_mouse_is_absolute()) {
 278         if (!absolute_enabled) {
 279             sdl_hide_cursor();
 280             if (gui_grab) {
 281                 sdl_grab_end();
 282             }
 283             absolute_enabled = 1;
 284         }
 285
 286         SDL_GetMouseState(&dx, &dy);
 287         dx = dx * 0x7FFF / width;
 288         dy = dy * 0x7FFF / height;
 289     } else if (absolute_enabled) {
 290         sdl_show_cursor();
 291         absolute_enabled = 0;
 292     }
 293
 294     kbd_mouse_event(dx, dy, dz, buttons);
 295 }
 296
 297 static void toggle_full_screen(DisplayState *ds)
 298 {
 299     gui_fullscreen = !gui_fullscreen;
 300     sdl_resize(ds, screen->w, screen->h);
 301     if (gui_fullscreen) {
 302         gui_saved_grab = gui_grab;
 303         sdl_grab_start();
 304     } else {
 305         if (!gui_saved_grab)
 306             sdl_grab_end();
 307     }
 308     vga_hw_invalidate();
 309     vga_hw_update();
 310 }
 311
 312 static void sdl_refresh(DisplayState *ds)
 313 {
 314     SDL_Event ev1, *ev = &ev1;
 315     int mod_state;
 316
 317     if (last_vm_running != vm_running) {
 318         last_vm_running = vm_running;
 319         sdl_update_caption();
 320     }
 321
 322     vga_hw_update();
 323
 324     while (SDL_PollEvent(ev)) {
 325         switch (ev->type) {
 326         case SDL_VIDEOEXPOSE:
 327             sdl_update(ds, 0, 0, screen->w, screen->h);
 328             break;
 329         case SDL_KEYDOWN:
 330         case SDL_KEYUP:
 331             if (ev->type == SDL_KEYDOWN) {
 332                 mod_state = (SDL_GetModState() & gui_grab_code) ==
 333                     gui_grab_code;
 334                 gui_key_modifier_pressed = mod_state;
 335                 if (gui_key_modifier_pressed) {
 336                     int keycode;
 337                     keycode = sdl_keyevent_to_keycode(&ev->key);
 338                     switch(keycode) {
 339                     case 0x21: /* 'f' key on US keyboard */
 340                         toggle_full_screen(ds);
 341                         gui_keysym = 1;
 342                         break;
 343                     case 0x02 ... 0x0a: /* '1' to '9' keys */
 344                         /* Reset the modifiers sent to the current console */
 345                         reset_keys();
 346                         console_select(keycode - 0x02);
 347                         if (!is_graphic_console()) {
 348                             /* display grab if going to a text console */
 349                             if (gui_grab)
 350                                 sdl_grab_end();
 351                         }
 352                         gui_keysym = 1;
 353                         break;
 354                     default:
 355                         break;
 356                     }
 357                 } else if (!is_graphic_console()) {
 358                     int keysym;
 359                     keysym = 0;
 360                     if (ev->key.keysym.mod & (KMOD_LCTRL | KMOD_RCTRL)) {
 361                         switch(ev->key.keysym.sym) {
 362                         case SDLK_UP: keysym = QEMU_KEY_CTRL_UP; break;
 363                         case SDLK_DOWN: keysym = QEMU_KEY_CTRL_DOWN; break;
 364                         case SDLK_LEFT: keysym = QEMU_KEY_CTRL_LEFT; break;
 365                         case SDLK_RIGHT: keysym = QEMU_KEY_CTRL_RIGHT; break;
 366                         case SDLK_HOME: keysym = QEMU_KEY_CTRL_HOME; break;
 367                         case SDLK_END: keysym = QEMU_KEY_CTRL_END; break;
 368                         case SDLK_PAGEUP: keysym = QEMU_KEY_CTRL_PAGEUP; break;
 369                         case SDLK_PAGEDOWN: keysym = QEMU_KEY_CTRL_PAGEDOWN; break;
 370                         default: break;
 371                         }
 372                     } else {
 373                         switch(ev->key.keysym.sym) {
 374                         case SDLK_UP: keysym = QEMU_KEY_UP; break;
 375                         case SDLK_DOWN: keysym = QEMU_KEY_DOWN; break;
 376                         case SDLK_LEFT: keysym = QEMU_KEY_LEFT; break;
 377                         case SDLK_RIGHT: keysym = QEMU_KEY_RIGHT; break;
 378                         case SDLK_HOME: keysym = QEMU_KEY_HOME; break;
 379                         case SDLK_END: keysym = QEMU_KEY_END; break;
 380                         case SDLK_PAGEUP: keysym = QEMU_KEY_PAGEUP; break;
 381                         case SDLK_PAGEDOWN: keysym = QEMU_KEY_PAGEDOWN; break;
 382                         case SDLK_BACKSPACE: keysym = QEMU_KEY_BACKSPACE; break;                        case SDLK_DELETE: keysym = QEMU_KEY_DELETE; break;
 383                         default: break;
 384                         }
 385                     }
 386                     if (keysym) {
 387                         kbd_put_keysym(keysym);
 388                     } else if (ev->key.keysym.unicode != 0) {
 389                         kbd_put_keysym(ev->key.keysym.unicode);
 390                     }
 391                 }
 392             } else if (ev->type == SDL_KEYUP) {
 393                 mod_state = (ev->key.keysym.mod & gui_grab_code);
 394                 if (!mod_state) {
 395                     if (gui_key_modifier_pressed) {
 396                         gui_key_modifier_pressed = 0;
 397                         if (gui_keysym == 0) {
 398                             /* exit/enter grab if pressing Ctrl-Alt */
 399                             if (!gui_grab) {
 400                                 /* if the application is not active,
 401                                    do not try to enter grab state. It
 402                                    prevents
 403                                    'SDL_WM_GrabInput(SDL_GRAB_ON)'
 404                                    from blocking all the application
 405                                    (SDL bug). */
 406                                 if (SDL_GetAppState() & SDL_APPACTIVE)
 407                                     sdl_grab_start();
 408                             } else {
 409                                 sdl_grab_end();
 410                             }
 411                             /* SDL does not send back all the
 412                                modifiers key, so we must correct it */
 413                             reset_keys();
 414                             break;
 415                         }
 416                         gui_keysym = 0;
 417                     }
 418                 }
 419             }
 420             if (is_graphic_console() && !gui_keysym)
 421                 sdl_process_key(&ev->key);
 422             break;
 423         case SDL_QUIT:
 424             if (!no_quit) {
 425                qemu_system_shutdown_request();
 426             }
 427             break;
 428         case SDL_MOUSEMOTION:
 429             if (gui_grab || kbd_mouse_is_absolute() ||
 430                 absolute_enabled) {
 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 && !kbd_mouse_is_absolute()) {
 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 && ev->type == SDL_MOUSEBUTTONDOWN) {
 449                         dz = -1;
 450                     } else if (bev->button == SDL_BUTTON_WHEELDOWN && ev->type == SDL_MOUSEBUTTONDOWN) {
 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, int no_frame)
 476 {
 477     int flags;
 478     uint8_t data = 0;
 479
 480 #if defined(__APPLE__)
 481     /* always use generic keymaps */
 482     if (!keyboard_layout)
 483         keyboard_layout = "en-us";
 484 #endif
 485     if(keyboard_layout) {
 486         kbd_layout = init_keyboard_layout(keyboard_layout);
 487         if (!kbd_layout)
 488             exit(1);
 489     }
 490
 491     if (no_frame)
 492         gui_noframe = 1;
 493
 494     flags = SDL_INIT_VIDEO | SDL_INIT_NOPARACHUTE;
 495     if (SDL_Init (flags)) {
 496         fprintf(stderr, "Could not initialize SDL - exiting\n");
 497         exit(1);
 498     }
 499 #ifndef _WIN32
 500     /* NOTE: we still want Ctrl-C to work, so we undo the SDL redirections */
 501     signal(SIGINT, SIG_DFL);
 502     signal(SIGQUIT, SIG_DFL);
 503 #endif
 504
 505     ds->dpy_update = sdl_update;
 506     ds->dpy_resize = sdl_resize;
 507     ds->dpy_refresh = sdl_refresh;
 508
 509     sdl_resize(ds, 640, 400);
 510     sdl_update_caption();
 511     SDL_EnableKeyRepeat(250, 50);
 512     SDL_EnableUNICODE(1);
 513     gui_grab = 0;
 514
 515     sdl_cursor_hidden = SDL_CreateCursor(&data, &data, 8, 1, 0, 0);
 516     sdl_cursor_normal = SDL_GetCursor();
 517
 518     atexit(sdl_cleanup);
 519     if (full_screen) {
 520         gui_fullscreen = 1;
 521         gui_fullscreen_initial_grab = 1;
 522         sdl_grab_start();
 523     }
 524 }