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