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
  40 static void sdl_update(DisplayState *ds, int x, int y, int w, int h)
  41 {
  42     //    printf("updating x=%d y=%d w=%d h=%d\n", x, y, w, h);
  43     SDL_UpdateRect(screen, x, y, w, h);
  44 }
  45
  46 static void sdl_resize(DisplayState *ds, int w, int h)
  47 {
  48     int flags;
  49
  50     //    printf("resizing to %d %d\n", w, h);
  51
  52     flags = SDL_HWSURFACE|SDL_ASYNCBLIT|SDL_HWACCEL;
  53     flags |= SDL_RESIZABLE;
  54     if (gui_fullscreen)
  55         flags |= SDL_FULLSCREEN;
  56     screen = SDL_SetVideoMode(w, h, 0, flags);
  57     if (!screen) {
  58         fprintf(stderr, "Could not open SDL display\n");
  59         exit(1);
  60     }
  61     ds->data = screen->pixels;
  62     ds->linesize = screen->pitch;
  63     ds->depth = screen->format->BitsPerPixel;
  64 }
  65
  66 static const uint8_t x_keycode_to_pc_keycode[61] = {
  67    0xc7,      /*  97  Home   */
  68    0xc8,      /*  98  Up     */
  69    0xc9,      /*  99  PgUp   */
  70    0xcb,      /* 100  Left   */
  71    0x4c,        /* 101  KP-5   */
  72    0xcd,      /* 102  Right  */
  73    0xcf,      /* 103  End    */
  74    0xd0,      /* 104  Down   */
  75    0xd1,      /* 105  PgDn   */
  76    0xd2,      /* 106  Ins    */
  77    0xd3,      /* 107  Del    */
  78    0x9c,      /* 108  Enter  */
  79    0x9d,      /* 109  Ctrl-R */
  80    0x0,       /* 110  Pause  */
  81    0xb7,      /* 111  Print  */
  82    0xb5,      /* 112  Divide */
  83    0xb8,      /* 113  Alt-R  */
  84    0xc6,      /* 114  Break  */
  85    0x0,         /* 115 */
  86    0x0,         /* 116 */
  87    0x0,         /* 117 */
  88    0x0,         /* 118 */
  89    0x0,         /* 119 */
  90    0x70,         /* 120 Hiragana_Katakana */
  91    0x0,         /* 121 */
  92    0x0,         /* 122 */
  93    0x73,         /* 123 backslash */
  94    0x0,         /* 124 */
  95    0x0,         /* 125 */
  96    0x0,         /* 126 */
  97    0x0,         /* 127 */
  98    0x0,         /* 128 */
  99    0x79,         /* 129 Henkan */
 100    0x0,         /* 130 */
 101    0x7b,         /* 131 Muhenkan */
 102    0x0,         /* 132 */
 103    0x7d,         /* 133 Yen */
 104    0x0,         /* 134 */
 105    0x0,         /* 135 */
 106    0x47,         /* 136 KP_7 */
 107    0x48,         /* 137 KP_8 */
 108    0x49,         /* 138 KP_9 */
 109    0x4b,         /* 139 KP_4 */
 110    0x4c,         /* 140 KP_5 */
 111    0x4d,         /* 141 KP_6 */
 112    0x4f,         /* 142 KP_1 */
 113    0x50,         /* 143 KP_2 */
 114    0x51,         /* 144 KP_3 */
 115    0x52,         /* 145 KP_0 */
 116    0x53,         /* 146 KP_. */
 117    0x47,         /* 147 KP_HOME */
 118    0x48,         /* 148 KP_UP */
 119    0x49,         /* 149 KP_PgUp */
 120    0x4b,         /* 150 KP_Left */
 121    0x4c,         /* 151 KP_ */
 122    0x4d,         /* 152 KP_Right */
 123    0x4f,         /* 153 KP_End */
 124    0x50,         /* 154 KP_Down */
 125    0x51,         /* 155 KP_PgDn */
 126    0x52,         /* 156 KP_Ins */
 127    0x53,         /* 157 KP_Del */
 128 };
 129
 130 static void sdl_process_key(SDL_KeyboardEvent *ev)
 131 {
 132     int keycode, v, i;
 133     static uint8_t modifiers_state[256];
 134
 135     if (ev->keysym.sym == SDLK_PAUSE) {
 136         /* specific case */
 137         v = 0;
 138         if (ev->type == SDL_KEYUP)
 139             v |= 0x80;
 140         kbd_put_keycode(0xe1);
 141         kbd_put_keycode(0x1d | v);
 142         kbd_put_keycode(0x45 | v);
 143         return;
 144     }
 145
 146     /* XXX: not portable, but avoids complicated mappings */
 147     keycode = ev->keysym.scancode;
 148
 149     /* XXX: windows version may not work: 0xe0/0xe1 should be trapped
 150        ? */
 151 #ifndef _WIN32
 152     if (keycode < 9) {
 153         keycode = 0;
 154     } else if (keycode < 97) {
 155         keycode -= 8; /* just an offset */
 156     } else if (keycode < 158) {
 157         /* use conversion table */
 158         keycode = x_keycode_to_pc_keycode[keycode - 97];
 159     } else {
 160         keycode = 0;
 161     }
 162 #endif
 163
 164     switch(keycode) {
 165     case 0x00:
 166         /* sent when leaving window: reset the modifiers state */
 167         for(i = 0; i < 256; i++) {
 168             if (modifiers_state[i]) {
 169                 if (i & 0x80)
 170                     kbd_put_keycode(0xe0);
 171                 kbd_put_keycode(i | 0x80);
 172             }
 173         }
 174         return;
 175     case 0x2a:                          /* Left Shift */
 176     case 0x36:                          /* Right Shift */
 177     case 0x1d:                          /* Left CTRL */
 178     case 0x9d:                          /* Right CTRL */
 179     case 0x38:                          /* Left ALT */
 180     case 0xb8:                         /* Right ALT */
 181         if (ev->type == SDL_KEYUP)
 182             modifiers_state[keycode] = 0;
 183         else
 184             modifiers_state[keycode] = 1;
 185         break;
 186     case 0x45: /* num lock */
 187     case 0x3a: /* caps lock */
 188         /* SDL does not send the key up event, so we generate it */
 189         kbd_put_keycode(keycode);
 190         kbd_put_keycode(keycode | 0x80);
 191         return;
 192     }
 193
 194     /* now send the key code */
 195     if (keycode & 0x80)
 196         kbd_put_keycode(0xe0);
 197     if (ev->type == SDL_KEYUP)
 198         kbd_put_keycode(keycode | 0x80);
 199     else
 200         kbd_put_keycode(keycode & 0x7f);
 201 }
 202
 203 static void sdl_update_caption(void)
 204 {
 205     char buf[1024];
 206     strcpy(buf, "QEMU");
 207     if (!vm_running) {
 208         strcat(buf, " [Stopped]");
 209     }
 210     if (gui_grab) {
 211         strcat(buf, " - Press Ctrl-Shift to exit grab");
 212     }
 213     SDL_WM_SetCaption(buf, "QEMU");
 214 }
 215
 216 static void sdl_grab_start(void)
 217 {
 218     SDL_ShowCursor(0);
 219     SDL_WM_GrabInput(SDL_GRAB_ON);
 220     /* dummy read to avoid moving the mouse */
 221     SDL_GetRelativeMouseState(NULL, NULL);
 222     gui_grab = 1;
 223     sdl_update_caption();
 224 }
 225
 226 static void sdl_grab_end(void)
 227 {
 228     SDL_WM_GrabInput(SDL_GRAB_OFF);
 229     SDL_ShowCursor(1);
 230     gui_grab = 0;
 231     sdl_update_caption();
 232 }
 233
 234 static void sdl_send_mouse_event(void)
 235 {
 236     int dx, dy, dz, state, buttons;
 237     state = SDL_GetRelativeMouseState(&dx, &dy);
 238     buttons = 0;
 239     if (state & SDL_BUTTON(SDL_BUTTON_LEFT))
 240         buttons |= MOUSE_EVENT_LBUTTON;
 241     if (state & SDL_BUTTON(SDL_BUTTON_RIGHT))
 242         buttons |= MOUSE_EVENT_RBUTTON;
 243     if (state & SDL_BUTTON(SDL_BUTTON_MIDDLE))
 244         buttons |= MOUSE_EVENT_MBUTTON;
 245     /* XXX: test wheel */
 246     dz = 0;
 247 #ifdef SDL_BUTTON_WHEELUP
 248     if (state & SDL_BUTTON(SDL_BUTTON_WHEELUP))
 249         dz--;
 250     if (state & SDL_BUTTON(SDL_BUTTON_WHEELDOWN))
 251         dz++;
 252 #endif
 253     kbd_mouse_event(dx, dy, dz, buttons);
 254 }
 255
 256 static void toggle_full_screen(DisplayState *ds)
 257 {
 258     gui_fullscreen = !gui_fullscreen;
 259     sdl_resize(ds, screen->w, screen->h);
 260     if (gui_fullscreen) {
 261         gui_saved_grab = gui_grab;
 262         sdl_grab_start();
 263     } else {
 264         if (!gui_saved_grab)
 265             sdl_grab_end();
 266     }
 267     vga_invalidate_display();
 268     vga_update_display();
 269 }
 270
 271 static void sdl_refresh(DisplayState *ds)
 272 {
 273     SDL_Event ev1, *ev = &ev1;
 274     int mod_state;
 275
 276     if (last_vm_running != vm_running) {
 277         last_vm_running = vm_running;
 278         sdl_update_caption();
 279     }
 280
 281     vga_update_display();
 282     while (SDL_PollEvent(ev)) {
 283         switch (ev->type) {
 284         case SDL_VIDEOEXPOSE:
 285             sdl_update(ds, 0, 0, screen->w, screen->h);
 286             break;
 287         case SDL_KEYDOWN:
 288         case SDL_KEYUP:
 289             if (ev->type == SDL_KEYDOWN) {
 290                 mod_state = (SDL_GetModState() & (KMOD_LSHIFT | KMOD_LCTRL)) ==
 291                     (KMOD_LSHIFT | KMOD_LCTRL);
 292                 gui_key_modifier_pressed = mod_state;
 293                 if (gui_key_modifier_pressed &&
 294                     ev->key.keysym.sym == SDLK_f) {
 295                     gui_keysym = ev->key.keysym.sym;
 296                 }
 297             } else if (ev->type == SDL_KEYUP) {
 298                 mod_state = (SDL_GetModState() & (KMOD_LSHIFT | KMOD_LCTRL));
 299                 if (!mod_state) {
 300                     if (gui_key_modifier_pressed) {
 301                         switch(gui_keysym) {
 302                         case SDLK_f:
 303                             toggle_full_screen(ds);
 304                             break;
 305                         case 0:
 306                             /* exit/enter grab if pressing Ctrl-Shift */
 307                             if (!gui_grab)
 308                                 sdl_grab_start();
 309                             else
 310                                 sdl_grab_end();
 311                             break;
 312                         }
 313                         gui_key_modifier_pressed = 0;
 314                         gui_keysym = 0;
 315                     }
 316                 }
 317             }
 318             sdl_process_key(&ev->key);
 319             break;
 320         case SDL_QUIT:
 321             qemu_system_shutdown_request();
 322             break;
 323         case SDL_MOUSEMOTION:
 324             if (gui_grab) {
 325                 sdl_send_mouse_event();
 326             }
 327             break;
 328         case SDL_MOUSEBUTTONDOWN:
 329         case SDL_MOUSEBUTTONUP:
 330             {
 331                 SDL_MouseButtonEvent *bev = &ev->button;
 332                 if (!gui_grab) {
 333                     if (ev->type == SDL_MOUSEBUTTONDOWN &&
 334                         (bev->state & SDL_BUTTON_LMASK)) {
 335                         /* start grabbing all events */
 336                         sdl_grab_start();
 337                     }
 338                 } else {
 339                     sdl_send_mouse_event();
 340                 }
 341             }
 342             break;
 343         case SDL_ACTIVEEVENT:
 344             if (gui_grab && (ev->active.gain & SDL_ACTIVEEVENTMASK) == 0) {
 345                 sdl_grab_end();
 346             }
 347             break;
 348         default:
 349             break;
 350         }
 351     }
 352 }
 353
 354 static void sdl_cleanup(void)
 355 {
 356     SDL_Quit();
 357 }
 358
 359 void sdl_display_init(DisplayState *ds)
 360 {
 361     int flags;
 362
 363     flags = SDL_INIT_VIDEO | SDL_INIT_NOPARACHUTE;
 364     if (SDL_Init (flags)) {
 365         fprintf(stderr, "Could not initialize SDL - exiting\n");
 366         exit(1);
 367     }
 368
 369 #ifndef _WIN32
 370     /* NOTE: we still want Ctrl-C to work, so we undo the SDL redirections */
 371     signal(SIGINT, SIG_DFL);
 372     signal(SIGQUIT, SIG_DFL);
 373 #endif
 374
 375     ds->dpy_update = sdl_update;
 376     ds->dpy_resize = sdl_resize;
 377     ds->dpy_refresh = sdl_refresh;
 378
 379     sdl_resize(ds, 640, 400);
 380     sdl_update_caption();
 381     SDL_EnableKeyRepeat(250, 50);
 382     gui_grab = 0;
 383
 384     atexit(sdl_cleanup);
 385 }