test/testwm.c
author Ryan C. Gordon <icculus@icculus.org>
Fri, 13 Jan 2006 02:32:07 +0000
changeset 1246 ca51a76a7328
parent 1151 be9c9c8f6d53
child 1284 08e3393e9ffb
permissions -rw-r--r--
Make error message meaningful if dlopen() fails on libX11.
     1 
     2 /* Test out the window manager interaction functions */
     3 
     4 #include <stdio.h>
     5 #include <stdlib.h>
     6 #include <string.h>
     7 
     8 #include "SDL.h"
     9 
    10 /* Is the cursor visible? */
    11 static int visible = 1;
    12 
    13 static Uint8  video_bpp;
    14 static Uint32 video_flags;
    15 
    16 /* Call this instead of exit(), so we can clean up SDL: atexit() is evil. */
    17 static void quit(int rc)
    18 {
    19 	SDL_Quit();
    20 	exit(rc);
    21 }
    22 
    23 int SetVideoMode(int w, int h)
    24 {
    25 	SDL_Surface *screen;
    26 	int i;
    27 	Uint8 *buffer;
    28 	SDL_Color palette[256];
    29 
    30 	screen = SDL_SetVideoMode(w, h, video_bpp, video_flags);
    31 	if (  screen == NULL ) {
    32 		fprintf(stderr, "Couldn't set %dx%dx%d video mode: %s\n",
    33 					w, h, video_bpp, SDL_GetError());
    34 		return(-1);
    35 	}
    36 	printf("Running in %s mode\n", screen->flags & SDL_FULLSCREEN ?
    37 						"fullscreen" : "windowed");
    38 
    39 	/* Set the surface pixels and refresh! */
    40 	for ( i=0; i<256; ++i ) {
    41 		palette[i].r = 255-i;
    42 		palette[i].g = 255-i;
    43 		palette[i].b = 255-i;
    44 	}
    45 	SDL_SetColors(screen, palette, 0, 256);
    46 	if ( SDL_LockSurface(screen) < 0 ) {
    47 		fprintf(stderr, "Couldn't lock display surface: %s\n",
    48 							SDL_GetError());
    49 		return(-1);
    50 	}
    51 	buffer = (Uint8 *)screen->pixels;
    52 	for ( i=0; i<screen->h; ++i ) {
    53 		memset(buffer,(i*255)/screen->h,
    54 				screen->w*screen->format->BytesPerPixel);
    55 		buffer += screen->pitch;
    56 	}
    57 	SDL_UnlockSurface(screen);
    58 	SDL_UpdateRect(screen, 0, 0, 0, 0);
    59 
    60 	return(0);
    61 }
    62 
    63 SDL_Surface *LoadIconSurface(char *file, Uint8 **maskp)
    64 {
    65 	SDL_Surface *icon;
    66 	Uint8       *pixels;
    67 	Uint8       *mask;
    68 	int          mlen, i, j;
    69 
    70 	*maskp = NULL;
    71 
    72 	/* Load the icon surface */
    73 	icon = SDL_LoadBMP(file);
    74 	if ( icon == NULL ) {
    75 		fprintf(stderr, "Couldn't load %s: %s\n", file, SDL_GetError());
    76 		return(NULL);
    77 	}
    78 
    79 	/* Check width and height 
    80 	if ( (icon->w%8) != 0 ) {
    81 		fprintf(stderr, "Icon width must be a multiple of 8!\n");
    82 		SDL_FreeSurface(icon);
    83 		return(NULL);
    84 	}
    85 */
    86     
    87     
    88 	if ( icon->format->palette == NULL ) {
    89 		fprintf(stderr, "Icon must have a palette!\n");
    90 		SDL_FreeSurface(icon);
    91 		return(NULL);
    92 	}
    93 
    94 	/* Set the colorkey */
    95 	SDL_SetColorKey(icon, SDL_SRCCOLORKEY, *((Uint8 *)icon->pixels));
    96 
    97 	/* Create the mask */
    98 	pixels = (Uint8 *)icon->pixels;
    99 	printf("Transparent pixel: (%d,%d,%d)\n",
   100 				icon->format->palette->colors[*pixels].r,
   101 				icon->format->palette->colors[*pixels].g,
   102 				icon->format->palette->colors[*pixels].b);
   103 	mlen = (icon->w*icon->h + 7) / 8;
   104 	mask = (Uint8 *)malloc(mlen);
   105 	if ( mask == NULL ) {
   106 		fprintf(stderr, "Out of memory!\n");
   107 		SDL_FreeSurface(icon);
   108 		return(NULL);
   109 	}
   110 	memset(mask, 0, mlen);
   111 	for ( i=0; i < icon->h; i++)
   112         for (j=0; j < icon->w; j++) {
   113             int pindex = i * icon->pitch + j;
   114             int mindex = i * icon->w + j;
   115             if ( pixels[pindex] != *pixels )
   116                 mask[mindex>>3] |= 1 << (7 - (mindex & 7));
   117         }
   118 	*maskp = mask;
   119 	return(icon);
   120 }
   121 
   122 void HotKey_ToggleFullScreen(void)
   123 {
   124 	SDL_Surface *screen;
   125 
   126 	screen = SDL_GetVideoSurface();
   127 	if ( SDL_WM_ToggleFullScreen(screen) ) {
   128 		printf("Toggled fullscreen mode - now %s\n",
   129 		    (screen->flags&SDL_FULLSCREEN) ? "fullscreen" : "windowed");
   130 	} else {
   131 		printf("Unable to toggle fullscreen mode\n");
   132 		video_flags ^= SDL_FULLSCREEN;
   133 		SetVideoMode(screen->w, screen->h);
   134 	}
   135 }
   136 
   137 void HotKey_ToggleGrab(void)
   138 {
   139 	SDL_GrabMode mode;
   140 
   141 	printf("Ctrl-G: toggling input grab!\n");
   142 	mode = SDL_WM_GrabInput(SDL_GRAB_QUERY);
   143 	if ( mode == SDL_GRAB_ON ) {
   144 		printf("Grab was on\n");
   145 	} else {
   146 		printf("Grab was off\n");
   147 	}
   148 	mode = SDL_WM_GrabInput(mode ? SDL_GRAB_OFF : SDL_GRAB_ON);
   149 	if ( mode == SDL_GRAB_ON ) {
   150 		printf("Grab is now on\n");
   151 	} else {
   152 		printf("Grab is now off\n");
   153 	}
   154 }
   155 
   156 void HotKey_Iconify(void)
   157 {
   158 	printf("Ctrl-Z: iconifying window!\n");
   159 	SDL_WM_IconifyWindow();
   160 }
   161 
   162 void HotKey_Quit(void)
   163 {
   164 	SDL_Event event;
   165 
   166 	printf("Posting internal quit request\n");
   167 	event.type = SDL_USEREVENT;
   168 	SDL_PushEvent(&event);
   169 }
   170 
   171 int FilterEvents(const SDL_Event *event)
   172 {
   173 	static int reallyquit = 0;
   174 
   175 	switch (event->type) {
   176 
   177 		case SDL_ACTIVEEVENT:
   178 			/* See what happened */
   179 			printf("App %s ",
   180 				event->active.gain ? "gained" : "lost");
   181 			if ( event->active.state & SDL_APPACTIVE )
   182 				printf("active ");
   183 			if ( event->active.state & SDL_APPMOUSEFOCUS )
   184 				printf("mouse ");
   185 			if ( event->active.state & SDL_APPINPUTFOCUS )
   186 				printf("input ");
   187 			printf("focus\n");
   188 
   189 			/* See if we are iconified or restored */
   190 			if ( event->active.state & SDL_APPACTIVE ) {
   191 				printf("App has been %s\n",
   192 					event->active.gain ?
   193 						 "restored" : "iconified");
   194 			}
   195 			return(0);
   196 
   197 		/* We want to toggle visibility on buttonpress */
   198 		case SDL_MOUSEBUTTONDOWN:
   199 		case SDL_MOUSEBUTTONUP:
   200 			if ( event->button.state == SDL_PRESSED ) {
   201 				visible = !visible;
   202 				SDL_ShowCursor(visible);
   203 			}
   204 			printf("Mouse button %d has been %s\n",
   205 				event->button.button,
   206 				(event->button.state == SDL_PRESSED) ?
   207 						"pressed" : "released");
   208 			return(0);
   209 
   210 		/* Show relative mouse motion */
   211 		case SDL_MOUSEMOTION:
   212 #if 0
   213 			printf("Mouse relative motion: {%d,%d}\n",
   214 				event->motion.xrel, event->motion.yrel);
   215 #endif
   216 			return(0);
   217 
   218 		case SDL_KEYDOWN:
   219 			if ( event->key.keysym.sym == SDLK_ESCAPE ) {
   220 				HotKey_Quit();
   221 			}
   222 			if ( (event->key.keysym.sym == SDLK_g) &&
   223 			     (event->key.keysym.mod & KMOD_CTRL) ) {
   224 				HotKey_ToggleGrab();
   225 			}
   226 			if ( (event->key.keysym.sym == SDLK_z) &&
   227 			     (event->key.keysym.mod & KMOD_CTRL) ) {
   228 				HotKey_Iconify();
   229 			}
   230 			if ( (event->key.keysym.sym == SDLK_RETURN) &&
   231 			     (event->key.keysym.mod & KMOD_ALT) ) {
   232 				HotKey_ToggleFullScreen();
   233 			}
   234 			return(0);
   235 
   236 		/* Pass the video resize event through .. */
   237 		case SDL_VIDEORESIZE:
   238 			return(1);
   239 
   240 		/* This is important!  Queue it if we want to quit. */
   241 		case SDL_QUIT:
   242 			if ( ! reallyquit ) {
   243 				reallyquit = 1;
   244 				printf("Quit requested\n");
   245 				return(0);
   246 			}
   247 			printf("Quit demanded\n");
   248 			return(1);
   249 
   250 		/* This will never happen because events queued directly
   251 		   to the event queue are not filtered.
   252 		 */
   253 		case SDL_USEREVENT:
   254 			return(1);
   255 
   256 		/* Drop all other events */
   257 		default:
   258 			return(0);
   259 	}
   260 }
   261 
   262 int main(int argc, char *argv[])
   263 {
   264 	SDL_Event event;
   265 	char *title;
   266 	SDL_Surface *icon;
   267 	Uint8 *icon_mask;
   268 	int parsed;
   269 	int w, h;
   270 
   271 	if ( SDL_Init(SDL_INIT_VIDEO) < 0 ) {
   272 		fprintf(stderr,
   273 			"Couldn't initialize SDL: %s\n", SDL_GetError());
   274 		return(1);
   275 	}
   276 
   277 	/* Check command line arguments */
   278 	w = 640;
   279 	h = 480;
   280 	video_bpp = 8;
   281 	video_flags = SDL_SWSURFACE;
   282 	parsed = 1;
   283 	while ( parsed ) {
   284 		if ( (argc >= 2) && (strcmp(argv[1], "-fullscreen") == 0) ) {
   285 			video_flags |= SDL_FULLSCREEN;
   286 			argc -= 1;
   287 			argv += 1;
   288 		} else
   289 		if ( (argc >= 2) && (strcmp(argv[1], "-resize") == 0) ) {
   290 			video_flags |= SDL_RESIZABLE;
   291 			argc -= 1;
   292 			argv += 1;
   293 		} else
   294 		if ( (argc >= 2) && (strcmp(argv[1], "-noframe") == 0) ) {
   295 			video_flags |= SDL_NOFRAME;
   296 			argc -= 1;
   297 			argv += 1;
   298 		} else
   299 		if ( (argc >= 3) && (strcmp(argv[1], "-width") == 0) ) {
   300 			w = atoi(argv[2]);
   301 			argc -= 2;
   302 			argv += 2;
   303 		} else
   304 		if ( (argc >= 3) && (strcmp(argv[1], "-height") == 0) ) {
   305 			h = atoi(argv[2]);
   306 			argc -= 2;
   307 			argv += 2;
   308 		} else
   309 		if ( (argc >= 3) && (strcmp(argv[1], "-bpp") == 0) ) {
   310 			video_bpp = atoi(argv[2]);
   311 			argc -= 2;
   312 			argv += 2;
   313 		} else {
   314 			parsed = 0;
   315 		}
   316 	}
   317 
   318 	/* Set the icon -- this must be done before the first mode set */
   319 	icon = LoadIconSurface("icon.bmp", &icon_mask);
   320 	if ( icon != NULL ) {
   321 		SDL_WM_SetIcon(icon, icon_mask);
   322 	}
   323 	if ( icon_mask != NULL )
   324 		free(icon_mask);
   325 
   326 	/* Set the title bar */
   327 	if ( argv[1] == NULL )
   328 		title = "Testing  1.. 2.. 3...";
   329 	else
   330 		title = argv[1];
   331 	SDL_WM_SetCaption(title, "testwm");
   332 
   333 	/* See if it's really set */
   334 	SDL_WM_GetCaption(&title, NULL);
   335 	if ( title )
   336 		printf("Title was set to: %s\n", title);
   337 	else
   338 		printf("No window title was set!\n");
   339 
   340 	/* Initialize the display */
   341 	if ( SetVideoMode(w, h) < 0 ) {
   342 		quit(1);
   343 	}
   344 
   345 	/* Set an event filter that discards everything but QUIT */
   346 	SDL_SetEventFilter(FilterEvents);
   347 
   348 	/* Ignore key up events, they don't even get filtered */
   349 	SDL_EventState(SDL_KEYUP, SDL_IGNORE);
   350 
   351 	/* Loop, waiting for QUIT */
   352 	while ( SDL_WaitEvent(&event) ) {
   353 		switch (event.type) {
   354 			case SDL_VIDEORESIZE:
   355 				printf("Got a resize event: %dx%d\n",
   356 				       event.resize.w, event.resize.h);
   357 				SetVideoMode(event.resize.w, event.resize.h);
   358 				break;
   359 			case SDL_USEREVENT:
   360 				printf("Handling internal quit request\n");
   361 				/* Fall through to the quit handler */
   362 			case SDL_QUIT:
   363 				printf("Bye bye..\n");
   364 				quit(0);
   365 			default:
   366 				/* This should never happen */
   367 				printf("Warning: Event %d wasn't filtered\n",
   368 								event.type);
   369 				break;
   370 		}
   371 	}
   372 	printf("SDL_WaitEvent() error: %s\n", SDL_GetError());
   373 	SDL_Quit();
   374 	return(255);
   375 }