test/threadwin.c

   1
   2 /* Test out the multi-threaded event handling functions */
   3
   4 #include <stdlib.h>
   5 #include <stdio.h>
   6 #include <string.h>
   7
   8 #include "SDL.h"
   9 #include "SDL_thread.h"
  10
  11 /* Are we done yet? */
  12 static int done = 0;
  13
  14 /* Is the cursor visible? */
  15 static int visible = 1;
  16
  17 /* Call this instead of exit(), so we can clean up SDL: atexit() is evil. */
  18 static void quit(int rc)
  19 {
  20         SDL_Quit();
  21         exit(rc);
  22 }
  23
  24 SDL_Surface *LoadIconSurface(char *file, Uint8 **maskp)
  25 {
  26         SDL_Surface *icon;
  27         Uint8       *pixels;
  28         Uint8       *mask;
  29         int          mlen, i;
  30
  31         *maskp = NULL;
  32
  33         /* Load the icon surface */
  34         icon = SDL_LoadBMP(file);
  35         if ( icon == NULL ) {
  36                 fprintf(stderr, "Couldn't load %s: %s\n", file, SDL_GetError());
  37                 return(NULL);
  38         }
  39
  40         /* Check width and height */
  41         if ( (icon->w%8) != 0 ) {
  42                 fprintf(stderr, "Icon width must be a multiple of 8!\n");
  43                 SDL_FreeSurface(icon);
  44                 return(NULL);
  45         }
  46         if ( icon->format->palette == NULL ) {
  47                 fprintf(stderr, "Icon must have a palette!\n");
  48                 SDL_FreeSurface(icon);
  49                 return(NULL);
  50         }
  51
  52         /* Set the colorkey */
  53         SDL_SetColorKey(icon, SDL_SRCCOLORKEY, *((Uint8 *)icon->pixels));
  54
  55         /* Create the mask */
  56         pixels = (Uint8 *)icon->pixels;
  57         printf("Transparent pixel: (%d,%d,%d)\n",
  58                                 icon->format->palette->colors[*pixels].r,
  59                                 icon->format->palette->colors[*pixels].g,
  60                                 icon->format->palette->colors[*pixels].b);
  61         mlen = icon->w*icon->h;
  62         mask = (Uint8 *)malloc(mlen/8);
  63         if ( mask == NULL ) {
  64                 fprintf(stderr, "Out of memory!\n");
  65                 SDL_FreeSurface(icon);
  66                 return(NULL);
  67         }
  68         memset(mask, 0, mlen/8);
  69         for ( i=0; i<mlen; ) {
  70                 if ( pixels[i] != *pixels )
  71                         mask[i/8] |= 0x01;
  72                 ++i;
  73                 if ( (i%8) != 0 )
  74                         mask[i/8] <<= 1;
  75         }
  76         *maskp = mask;
  77         return(icon);
  78 }
  79
  80 int SDLCALL FilterEvents(const SDL_Event *event)
  81 {
  82         static int reallyquit = 0;
  83
  84         switch (event->type) {
  85
  86                 case SDL_ACTIVEEVENT:
  87                         /* See what happened */
  88                         printf("App %s ",
  89                                 event->active.gain ? "gained" : "lost");
  90                         if ( event->active.state & SDL_APPACTIVE )
  91                                 printf("active ");
  92                         if ( event->active.state & SDL_APPMOUSEFOCUS )
  93                                 printf("mouse ");
  94                         if ( event->active.state & SDL_APPINPUTFOCUS )
  95                                 printf("input ");
  96                         printf("focus\n");
  97
  98                         /* See if we are iconified or restored */
  99                         if ( event->active.state & SDL_APPACTIVE ) {
 100                                 printf("App has been %s\n",
 101                                         event->active.gain ?
 102                                                  "restored" : "iconified");
 103                         }
 104                         return(0);
 105
 106                 /* This is important!  Queue it if we want to quit. */
 107                 case SDL_QUIT:
 108                         if ( ! reallyquit ) {
 109                                 reallyquit = 1;
 110                                 printf("Quit requested\n");
 111                                 return(0);
 112                         }
 113                         printf("Quit demanded\n");
 114                         return(1);
 115
 116                 /* Mouse and keyboard events go to threads */
 117                 case SDL_MOUSEMOTION:
 118                 case SDL_MOUSEBUTTONDOWN:
 119                 case SDL_MOUSEBUTTONUP:
 120                 case SDL_KEYDOWN:
 121                 case SDL_KEYUP:
 122                         return(1);
 123
 124                 /* Drop all other events */
 125                 default:
 126                         return(0);
 127         }
 128 }
 129
 130 int SDLCALL HandleMouse(void *unused)
 131 {
 132         SDL_Event events[10];
 133         int i, found;
 134         Uint32 mask;
 135
 136         /* Handle mouse events here */
 137         mask = (SDL_MOUSEMOTIONMASK|SDL_MOUSEBUTTONDOWNMASK|SDL_MOUSEBUTTONUPMASK);
 138         while ( ! done ) {
 139                 found = SDL_PeepEvents(events, 10, SDL_GETEVENT, mask);
 140                 for ( i=0; i<found; ++i ) {
 141                         switch(events[i].type) {
 142                                 /* We want to toggle visibility on buttonpress */
 143                                 case SDL_MOUSEBUTTONDOWN:
 144                                 case SDL_MOUSEBUTTONUP:
 145                                         if ( events[i].button.state == SDL_PRESSED ) {
 146                                                 visible = !visible;
 147                                                 SDL_ShowCursor(visible);
 148                                         }
 149                                         printf("Mouse button %d has been %s\n",
 150                                                 events[i].button.button,
 151                                                 (events[i].button.state == SDL_PRESSED) ?
 152                                                 "pressed" : "released");
 153                                         break;
 154                                 /* Show relative mouse motion */
 155                                 case SDL_MOUSEMOTION:
 156                                         printf("Mouse relative motion: {%d,%d}\n",
 157                                                         events[i].motion.xrel, events[i].motion.yrel);
 158                                         break;
 159                         }
 160                 }
 161                 /* Give up some CPU to allow events to arrive */
 162                 SDL_Delay(20);
 163         }
 164         return(0);
 165 }
 166
 167 int SDLCALL HandleKeyboard(void *unused)
 168 {
 169         SDL_Event events[10];
 170         int i, found;
 171         Uint32 mask;
 172
 173         /* Handle mouse events here */
 174         mask = (SDL_KEYDOWNMASK|SDL_KEYUPMASK);
 175         while ( ! done ) {
 176                 found = SDL_PeepEvents(events, 10, SDL_GETEVENT, mask);
 177                 for ( i=0; i<found; ++i ) {
 178                         switch(events[i].type) {
 179                             /* We want to toggle visibility on buttonpress */
 180                             case SDL_KEYDOWN:
 181                             case SDL_KEYUP:
 182                                 printf("Key '%c' (keysym==%d) has been %s\n",
 183                                                 events[i].key.keysym.unicode,
 184                                                 (int) events[i].key.keysym.sym,
 185                                         (events[i].key.state == SDL_PRESSED) ?
 186                                                 "pressed" : "released");
 187
 188                                 /* Allow hitting <ESC> to quit the app */
 189                                 if ( events[i].key.keysym.sym == SDLK_ESCAPE ) {
 190                                         done = 1;
 191                                 }
 192
 193                                         /* skip events now that aren't KEYUPs... */
 194                                         if (events[i].key.state == SDL_PRESSED)
 195                                                 break;
 196
 197                                 if ( events[i].key.keysym.sym == SDLK_f ) {
 198                                                 int rc = 0;
 199                                                 printf("attempting to toggle fullscreen...\n");
 200                                                 rc = SDL_WM_ToggleFullScreen(SDL_GetVideoSurface());
 201                         printf("SDL_WM_ToggleFullScreen returned %d.\n", rc);
 202                                 }
 203
 204                                 if ( events[i].key.keysym.sym == SDLK_g ) {
 205                                                 SDL_GrabMode m;
 206                                                 m = SDL_WM_GrabInput(SDL_GRAB_QUERY) == SDL_GRAB_ON ?
 207                                                                 SDL_GRAB_OFF : SDL_GRAB_ON;
 208                                                 printf("attempting to toggle input grab to %s...\n",
 209                                 m == SDL_GRAB_ON ? "ON" : "OFF");
 210                         SDL_WM_GrabInput(m);
 211                                                 printf("attempt finished.\n");
 212                                 }
 213
 214                                 break;
 215                         }
 216                 }
 217                 /* Give up some CPU to allow events to arrive */
 218                 SDL_Delay(20);
 219         }
 220         return(0);
 221 }
 222
 223 int main(int argc, char *argv[])
 224 {
 225         SDL_Surface *screen;
 226         SDL_Surface *icon;
 227         Uint8 *icon_mask;
 228         int i, parsed;
 229         Uint8 *buffer;
 230         SDL_Color palette[256];
 231         Uint32 init_flags;
 232         Uint8  video_bpp;
 233         Uint32 video_flags;
 234         SDL_Thread *mouse_thread;
 235         SDL_Thread *keybd_thread;
 236
 237         /* Set the options, based on command line arguments */
 238         init_flags = SDL_INIT_VIDEO;
 239         video_bpp = 8;
 240         video_flags = SDL_SWSURFACE;
 241         parsed = 1;
 242         while ( parsed ) {
 243                 /* If the threaded option is enabled, and the SDL library hasn't
 244                    been compiled with threaded events enabled, then the mouse and
 245                    keyboard won't respond.
 246                  */
 247                 if ( (argc >= 2) && (strcmp(argv[1], "-threaded") == 0) ) {
 248                         init_flags |= SDL_INIT_EVENTTHREAD;
 249                         argc -= 1;
 250                         argv += 1;
 251                         printf("Running with threaded events\n");
 252                 } else
 253                 if ( (argc >= 2) && (strcmp(argv[1], "-fullscreen") == 0) ) {
 254                         video_flags |= SDL_FULLSCREEN;
 255                         argc -= 1;
 256                         argv += 1;
 257                 } else
 258                 if ( (argc >= 3) && (strcmp(argv[1], "-bpp") == 0) ) {
 259                         video_bpp = atoi(argv[2]);
 260                         argc -= 2;
 261                         argv += 2;
 262                 } else {
 263                         parsed = 0;
 264                 }
 265         }
 266
 267         /* Initialize SDL with the requested flags */
 268         if ( SDL_Init(init_flags) < 0 ) {
 269                 fprintf(stderr,
 270                         "Couldn't initialize SDL: %s\n", SDL_GetError());
 271                 return(1);
 272         }
 273
 274         /* Set the icon -- this must be done before the first mode set */
 275         icon = LoadIconSurface("icon.bmp", &icon_mask);
 276         if ( icon != NULL ) {
 277                 SDL_WM_SetIcon(icon, icon_mask);
 278         }
 279         if ( icon_mask != NULL )
 280                 free(icon_mask);
 281
 282         /* Initialize the display */
 283         screen = SDL_SetVideoMode(640, 480, video_bpp, video_flags);
 284         if (  screen == NULL ) {
 285                 fprintf(stderr, "Couldn't set 640x480x%d video mode: %s\n",
 286                                                 video_bpp, SDL_GetError());
 287                 quit(1);
 288         }
 289         printf("Running in %s mode\n", screen->flags & SDL_FULLSCREEN ?
 290                                                 "fullscreen" : "windowed");
 291
 292         /* Enable printable characters */
 293         SDL_EnableUNICODE(1);
 294
 295         /* Set an event filter that discards everything but QUIT */
 296         SDL_SetEventFilter(FilterEvents);
 297
 298         /* Create the event handling threads */
 299         mouse_thread = SDL_CreateThread(HandleMouse, NULL);
 300         keybd_thread = SDL_CreateThread(HandleKeyboard, NULL);
 301
 302         /* Set the surface pixels and refresh! */
 303         for ( i=0; i<256; ++i ) {
 304                 palette[i].r = 255-i;
 305                 palette[i].g = 255-i;
 306                 palette[i].b = 255-i;
 307         }
 308         SDL_SetColors(screen, palette, 0, 256);
 309         if ( SDL_LockSurface(screen) < 0 ) {
 310                 fprintf(stderr, "Couldn't lock display surface: %s\n",
 311                                                         SDL_GetError());
 312                 quit(2);
 313         }
 314         buffer = (Uint8 *)screen->pixels;
 315         for ( i=0; i<screen->h; ++i ) {
 316                 memset(buffer,(i*255)/screen->h,
 317                                 screen->w*screen->format->BytesPerPixel);
 318                 buffer += screen->pitch;
 319         }
 320         SDL_UnlockSurface(screen);
 321         SDL_UpdateRect(screen, 0, 0, 0, 0);
 322
 323         /* Loop, waiting for QUIT */
 324         while ( ! done ) {
 325                 if ( ! (init_flags & SDL_INIT_EVENTTHREAD) ) {
 326                         SDL_PumpEvents(); /* Needed when event thread is off */
 327                 }
 328                 if ( SDL_PeepEvents(NULL, 0, SDL_PEEKEVENT, SDL_QUITMASK) ) {
 329                         done = 1;
 330                 }
 331                 /* Give up some CPU so the events can accumulate */
 332                 SDL_Delay(20);
 333         }
 334         SDL_WaitThread(mouse_thread, NULL);
 335         SDL_WaitThread(keybd_thread, NULL);
 336         SDL_Quit();
 337         return(0);
 338 }