e14743d1 |
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 | } |