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
  36 static void sdl_update(DisplayState *ds, int x, int y, int w, int h)
  37 {
  38     //    printf("updating x=%d y=%d w=%d h=%d\n", x, y, w, h);
  39     SDL_UpdateRect(screen, x, y, w, h);
  40 }
  41
  42 static void sdl_resize(DisplayState *ds, int w, int h)
  43 {
  44     int flags;
  45
  46     //    printf("resizing to %d %d\n", w, h);
  47
  48     flags = SDL_HWSURFACE|SDL_ASYNCBLIT|SDL_HWACCEL;
  49     flags |= SDL_RESIZABLE;
  50     screen = SDL_SetVideoMode(w, h, 0, flags);
  51     if (!screen) {
  52         fprintf(stderr, "Could not open SDL display\n");
  53         exit(1);
  54     }
  55     ds->data = screen->pixels;
  56     ds->linesize = screen->pitch;
  57     ds->depth = screen->format->BitsPerPixel;
  58 }
  59
  60 static const uint32_t x_keycode_to_pc_keycode[61] = {
  61    0x47e0,      /*  97  Home   */
  62    0x48e0,      /*  98  Up     */
  63    0x49e0,      /*  99  PgUp   */
  64    0x4be0,      /* 100  Left   */
  65    0x4c,        /* 101  KP-5   */
  66    0x4de0,      /* 102  Right  */
  67    0x4fe0,      /* 103  End    */
  68    0x50e0,      /* 104  Down   */
  69    0x51e0,      /* 105  PgDn   */
  70    0x52e0,      /* 106  Ins    */
  71    0x53e0,      /* 107  Del    */
  72    0x1ce0,      /* 108  Enter  */
  73    0x1de0,      /* 109  Ctrl-R */
  74    0x451de1,    /* 110  Pause  */
  75    0x37e0,      /* 111  Print  */
  76    0x35e0,      /* 112  Divide */
  77    0x38e0,      /* 113  Alt-R  */
  78    0x46e0,      /* 114  Break  */
  79    0x0,         /* 115 */
  80    0x0,         /* 116 */
  81    0x0,         /* 117 */
  82    0x0,         /* 118 */
  83    0x0,         /* 119 */
  84    0x0,         /* 120 */
  85    0x0,         /* 121 */
  86    0x0,         /* 122 */
  87    0x0,         /* 123 */
  88    0x0,         /* 124 */
  89    0x0,         /* 125 */
  90    0x0,         /* 126 */
  91    0x0,         /* 127 */
  92    0x0,         /* 128 */
  93    0x0,         /* 129 */
  94    0x0,         /* 130 */
  95    0x0,         /* 131 */
  96    0x0,         /* 132 */
  97    0x0,         /* 133 */
  98    0x0,         /* 134 */
  99    0x0,         /* 135 */
 100    0x47,         /* 136 KP_7 */
 101    0x48,         /* 137 KP_8 */
 102    0x49,         /* 138 KP_9 */
 103    0x4b,         /* 139 KP_4 */
 104    0x4c,         /* 140 KP_5 */
 105    0x4d,         /* 141 KP_6 */
 106    0x4f,         /* 142 KP_1 */
 107    0x50,         /* 143 KP_2 */
 108    0x51,         /* 144 KP_3 */
 109    0x52,         /* 145 KP_0 */
 110    0x53,         /* 146 KP_. */
 111    0x47,         /* 147 KP_HOME */
 112    0x48,         /* 148 KP_UP */
 113    0x49,         /* 149 KP_PgUp */
 114    0x4b,         /* 150 KP_Left */
 115    0x4c,         /* 151 KP_ */
 116    0x4d,         /* 152 KP_Right */
 117    0x4f,         /* 153 KP_End */
 118    0x50,         /* 154 KP_Down */
 119    0x51,         /* 155 KP_PgDn */
 120    0x52,         /* 156 KP_Ins */
 121    0x53,         /* 157 KP_Del */
 122 };
 123
 124 static void sdl_process_key(SDL_KeyboardEvent *ev)
 125 {
 126     int keycode, v;
 127
 128     /* XXX: not portable, but avoids complicated mappings */
 129     keycode = ev->keysym.scancode;
 130     if (keycode < 9) {
 131         keycode = 0;
 132     } else if (keycode < 97) {
 133         keycode -= 8; /* just an offset */
 134     } else if (keycode < 158) {
 135         /* use conversion table */
 136         keycode = x_keycode_to_pc_keycode[keycode - 97];
 137     } else {
 138         keycode = 0;
 139     }
 140
 141     /* now send the key code */
 142     while (keycode != 0) {
 143         v = keycode & 0xff;
 144         if (ev->type == SDL_KEYUP)
 145             v |= 0x80;
 146         kbd_put_keycode(v);
 147         keycode >>= 8;
 148     }
 149 }
 150
 151 static void sdl_update_caption(void)
 152 {
 153     char buf[1024];
 154     strcpy(buf, "QEMU");
 155     if (!vm_running) {
 156         strcat(buf, " [Stopped]");
 157     }
 158     if (gui_grab) {
 159         strcat(buf, " - Press Ctrl-Shift to exit grab");
 160     }
 161     SDL_WM_SetCaption(buf, "QEMU");
 162 }
 163
 164 static void sdl_grab_start(void)
 165 {
 166     SDL_ShowCursor(0);
 167     SDL_WM_GrabInput(SDL_GRAB_ON);
 168     /* dummy read to avoid moving the mouse */
 169     SDL_GetRelativeMouseState(NULL, NULL);
 170     gui_grab = 1;
 171     sdl_update_caption();
 172 }
 173
 174 static void sdl_grab_end(void)
 175 {
 176     SDL_WM_GrabInput(SDL_GRAB_OFF);
 177     SDL_ShowCursor(1);
 178     gui_grab = 0;
 179     sdl_update_caption();
 180 }
 181
 182 static void sdl_send_mouse_event(void)
 183 {
 184     int dx, dy, dz, state, buttons;
 185     state = SDL_GetRelativeMouseState(&dx, &dy);
 186     buttons = 0;
 187     if (state & SDL_BUTTON(SDL_BUTTON_LEFT))
 188         buttons |= MOUSE_EVENT_LBUTTON;
 189     if (state & SDL_BUTTON(SDL_BUTTON_RIGHT))
 190         buttons |= MOUSE_EVENT_RBUTTON;
 191     if (state & SDL_BUTTON(SDL_BUTTON_MIDDLE))
 192         buttons |= MOUSE_EVENT_MBUTTON;
 193     /* XXX: test wheel */
 194     dz = 0;
 195 #ifdef SDL_BUTTON_WHEELUP
 196     if (state & SDL_BUTTON(SDL_BUTTON_WHEELUP))
 197         dz--;
 198     if (state & SDL_BUTTON(SDL_BUTTON_WHEELDOWN))
 199         dz++;
 200 #endif
 201     kbd_mouse_event(dx, dy, dz, buttons);
 202 }
 203
 204 static void sdl_refresh(DisplayState *ds)
 205 {
 206     SDL_Event ev1, *ev = &ev1;
 207
 208     if (last_vm_running != vm_running) {
 209         last_vm_running = vm_running;
 210         sdl_update_caption();
 211     }
 212
 213     vga_update_display();
 214     while (SDL_PollEvent(ev)) {
 215         switch (ev->type) {
 216         case SDL_VIDEOEXPOSE:
 217             sdl_update(ds, 0, 0, screen->w, screen->h);
 218             break;
 219         case SDL_KEYDOWN:
 220         case SDL_KEYUP:
 221             if (ev->type == SDL_KEYDOWN) {
 222                 if ((SDL_GetModState() & (KMOD_LSHIFT | KMOD_LCTRL)) ==
 223                     (KMOD_LSHIFT | KMOD_LCTRL)) {
 224                     /* exit/enter grab if pressing Ctrl-Shift */
 225                     if (!gui_grab)
 226                         sdl_grab_start();
 227                     else
 228                         sdl_grab_end();
 229                 }
 230             }
 231             sdl_process_key(&ev->key);
 232             break;
 233         case SDL_QUIT:
 234             reset_requested = 1;
 235             break;
 236         case SDL_MOUSEMOTION:
 237             if (gui_grab) {
 238                 sdl_send_mouse_event();
 239             }
 240             break;
 241         case SDL_MOUSEBUTTONDOWN:
 242         case SDL_MOUSEBUTTONUP:
 243             {
 244                 SDL_MouseButtonEvent *bev = &ev->button;
 245                 if (!gui_grab) {
 246                     if (ev->type == SDL_MOUSEBUTTONDOWN &&
 247                         (bev->state & SDL_BUTTON_LMASK)) {
 248                         /* start grabbing all events */
 249                         sdl_grab_start();
 250                     }
 251                 } else {
 252                     sdl_send_mouse_event();
 253                 }
 254             }
 255             break;
 256         default:
 257             break;
 258         }
 259     }
 260 }
 261
 262 static void sdl_cleanup(void)
 263 {
 264     SDL_Quit();
 265 }
 266
 267 void sdl_display_init(DisplayState *ds)
 268 {
 269     int flags;
 270
 271     flags = SDL_INIT_VIDEO | SDL_INIT_NOPARACHUTE;
 272     if (SDL_Init (flags)) {
 273         fprintf(stderr, "Could not initialize SDL - exiting\n");
 274         exit(1);
 275     }
 276
 277 #ifndef _WIN32
 278     /* NOTE: we still want Ctrl-C to work, so we undo the SDL redirections */
 279     signal(SIGINT, SIG_DFL);
 280     signal(SIGQUIT, SIG_DFL);
 281 #endif
 282
 283     ds->dpy_update = sdl_update;
 284     ds->dpy_resize = sdl_resize;
 285     ds->dpy_refresh = sdl_refresh;
 286
 287     sdl_resize(ds, 640, 400);
 288     sdl_update_caption();
 289     SDL_EnableKeyRepeat(250, 50);
 290     gui_grab = 0;
 291
 292     atexit(sdl_cleanup);
 293 }