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 uint32_t x_keycode_to_pc_keycode[61] = {
  67    0x47e0,      /*  97  Home   */
  68    0x48e0,      /*  98  Up     */
  69    0x49e0,      /*  99  PgUp   */
  70    0x4be0,      /* 100  Left   */
  71    0x4c,        /* 101  KP-5   */
  72    0x4de0,      /* 102  Right  */
  73    0x4fe0,      /* 103  End    */
  74    0x50e0,      /* 104  Down   */
  75    0x51e0,      /* 105  PgDn   */
  76    0x52e0,      /* 106  Ins    */
  77    0x53e0,      /* 107  Del    */
  78    0x1ce0,      /* 108  Enter  */
  79    0x1de0,      /* 109  Ctrl-R */
  80    0x451de1,    /* 110  Pause  */
  81    0x37e0,      /* 111  Print  */
  82    0x35e0,      /* 112  Divide */
  83    0x38e0,      /* 113  Alt-R  */
  84    0x46e0,      /* 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;
 133
 134     /* XXX: not portable, but avoids complicated mappings */
 135     keycode = ev->keysym.scancode;
 136
 137 #ifndef _WIN32
 138     if (keycode < 9) {
 139         keycode = 0;
 140     } else if (keycode < 97) {
 141         keycode -= 8; /* just an offset */
 142     } else if (keycode < 158) {
 143         /* use conversion table */
 144         keycode = x_keycode_to_pc_keycode[keycode - 97];
 145     } else {
 146         keycode = 0;
 147     }
 148 #endif
 149
 150     /* now send the key code */
 151     while (keycode != 0) {
 152         v = keycode & 0xff;
 153         if (ev->type == SDL_KEYUP)
 154             v |= 0x80;
 155         kbd_put_keycode(v);
 156         keycode >>= 8;
 157     }
 158 }
 159
 160 static void sdl_update_caption(void)
 161 {
 162     char buf[1024];
 163     strcpy(buf, "QEMU");
 164     if (!vm_running) {
 165         strcat(buf, " [Stopped]");
 166     }
 167     if (gui_grab) {
 168         strcat(buf, " - Press Ctrl-Shift to exit grab");
 169     }
 170     SDL_WM_SetCaption(buf, "QEMU");
 171 }
 172
 173 static void sdl_grab_start(void)
 174 {
 175     SDL_ShowCursor(0);
 176     SDL_WM_GrabInput(SDL_GRAB_ON);
 177     /* dummy read to avoid moving the mouse */
 178     SDL_GetRelativeMouseState(NULL, NULL);
 179     gui_grab = 1;
 180     sdl_update_caption();
 181 }
 182
 183 static void sdl_grab_end(void)
 184 {
 185     SDL_WM_GrabInput(SDL_GRAB_OFF);
 186     SDL_ShowCursor(1);
 187     gui_grab = 0;
 188     sdl_update_caption();
 189 }
 190
 191 static void sdl_send_mouse_event(void)
 192 {
 193     int dx, dy, dz, state, buttons;
 194     state = SDL_GetRelativeMouseState(&dx, &dy);
 195     buttons = 0;
 196     if (state & SDL_BUTTON(SDL_BUTTON_LEFT))
 197         buttons |= MOUSE_EVENT_LBUTTON;
 198     if (state & SDL_BUTTON(SDL_BUTTON_RIGHT))
 199         buttons |= MOUSE_EVENT_RBUTTON;
 200     if (state & SDL_BUTTON(SDL_BUTTON_MIDDLE))
 201         buttons |= MOUSE_EVENT_MBUTTON;
 202     /* XXX: test wheel */
 203     dz = 0;
 204 #ifdef SDL_BUTTON_WHEELUP
 205     if (state & SDL_BUTTON(SDL_BUTTON_WHEELUP))
 206         dz--;
 207     if (state & SDL_BUTTON(SDL_BUTTON_WHEELDOWN))
 208         dz++;
 209 #endif
 210     kbd_mouse_event(dx, dy, dz, buttons);
 211 }
 212
 213 static void toggle_full_screen(DisplayState *ds)
 214 {
 215     gui_fullscreen = !gui_fullscreen;
 216     sdl_resize(ds, screen->w, screen->h);
 217     if (gui_fullscreen) {
 218         gui_saved_grab = gui_grab;
 219         sdl_grab_start();
 220     } else {
 221         if (!gui_saved_grab)
 222             sdl_grab_end();
 223     }
 224     vga_update_display();
 225     sdl_update(ds, 0, 0, screen->w, screen->h);
 226 }
 227
 228 static void sdl_refresh(DisplayState *ds)
 229 {
 230     SDL_Event ev1, *ev = &ev1;
 231     int mod_state;
 232
 233     if (last_vm_running != vm_running) {
 234         last_vm_running = vm_running;
 235         sdl_update_caption();
 236     }
 237
 238     vga_update_display();
 239     while (SDL_PollEvent(ev)) {
 240         switch (ev->type) {
 241         case SDL_VIDEOEXPOSE:
 242             sdl_update(ds, 0, 0, screen->w, screen->h);
 243             break;
 244         case SDL_KEYDOWN:
 245         case SDL_KEYUP:
 246             if (ev->type == SDL_KEYDOWN) {
 247                 mod_state = (SDL_GetModState() & (KMOD_LSHIFT | KMOD_LCTRL)) ==
 248                     (KMOD_LSHIFT | KMOD_LCTRL);
 249                 gui_key_modifier_pressed = mod_state;
 250                 if (gui_key_modifier_pressed &&
 251                     ev->key.keysym.sym == SDLK_f) {
 252                     gui_keysym = ev->key.keysym.sym;
 253                 }
 254             } else if (ev->type == SDL_KEYUP) {
 255                 mod_state = (SDL_GetModState() & (KMOD_LSHIFT | KMOD_LCTRL));
 256                 if (!mod_state) {
 257                     if (gui_key_modifier_pressed) {
 258                         switch(gui_keysym) {
 259                         case SDLK_f:
 260                             toggle_full_screen(ds);
 261                             break;
 262                         case 0:
 263                             /* exit/enter grab if pressing Ctrl-Shift */
 264                             if (!gui_grab)
 265                                 sdl_grab_start();
 266                             else
 267                                 sdl_grab_end();
 268                             break;
 269                         }
 270                         gui_key_modifier_pressed = 0;
 271                         gui_keysym = 0;
 272                     }
 273                 }
 274             }
 275             sdl_process_key(&ev->key);
 276             break;
 277         case SDL_QUIT:
 278             reset_requested = 1;
 279             break;
 280         case SDL_MOUSEMOTION:
 281             if (gui_grab) {
 282                 sdl_send_mouse_event();
 283             }
 284             break;
 285         case SDL_MOUSEBUTTONDOWN:
 286         case SDL_MOUSEBUTTONUP:
 287             {
 288                 SDL_MouseButtonEvent *bev = &ev->button;
 289                 if (!gui_grab) {
 290                     if (ev->type == SDL_MOUSEBUTTONDOWN &&
 291                         (bev->state & SDL_BUTTON_LMASK)) {
 292                         /* start grabbing all events */
 293                         sdl_grab_start();
 294                     }
 295                 } else {
 296                     sdl_send_mouse_event();
 297                 }
 298             }
 299             break;
 300         case SDL_ACTIVEEVENT:
 301             if (gui_grab && (ev->active.gain & SDL_ACTIVEEVENTMASK) == 0) {
 302                 sdl_grab_end();
 303             }
 304             break;
 305         default:
 306             break;
 307         }
 308     }
 309 }
 310
 311 static void sdl_cleanup(void)
 312 {
 313     SDL_Quit();
 314 }
 315
 316 void sdl_display_init(DisplayState *ds)
 317 {
 318     int flags;
 319
 320     flags = SDL_INIT_VIDEO | SDL_INIT_NOPARACHUTE;
 321     if (SDL_Init (flags)) {
 322         fprintf(stderr, "Could not initialize SDL - exiting\n");
 323         exit(1);
 324     }
 325
 326 #ifndef _WIN32
 327     /* NOTE: we still want Ctrl-C to work, so we undo the SDL redirections */
 328     signal(SIGINT, SIG_DFL);
 329     signal(SIGQUIT, SIG_DFL);
 330 #endif
 331
 332     ds->dpy_update = sdl_update;
 333     ds->dpy_resize = sdl_resize;
 334     ds->dpy_refresh = sdl_refresh;
 335
 336     sdl_resize(ds, 640, 400);
 337     sdl_update_caption();
 338     SDL_EnableKeyRepeat(250, 50);
 339     gui_grab = 0;
 340
 341     atexit(sdl_cleanup);
 342 }