Patrick Williams | c124f4f | 2015-09-15 14:41:29 -0500 | [diff] [blame] | 1 | /* |
| 2 | * Pong Clock - A clock that plays pong. |
| 3 | * See http://mocoloco.com/archives/001766.php for the inspiration. |
| 4 | * |
| 5 | * Copyright (C) 2005 Matthew Allum |
| 6 | * |
| 7 | * Author: Matthew Allum mallum@openedhand.com |
| 8 | * |
| 9 | * This program is free software; you can redistribute it and/or modify |
| 10 | * it under the terms of the GNU General Public License as published by |
| 11 | * the Free Software Foundation; either version 2 of the License, or |
| 12 | * (at your option) any later version. |
| 13 | * |
| 14 | * This program is distributed in the hope that it will be useful, |
| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 17 | * GNU General Public License for more details. |
| 18 | * |
| 19 | * You should have received a copy of the GNU General Public License |
| 20 | * along with this program; if not, write to the Free Software |
| 21 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| 22 | * |
| 23 | */ |
| 24 | |
| 25 | #include <stdlib.h> |
| 26 | #include <time.h> |
| 27 | #include <sys/time.h> |
| 28 | #include <sys/types.h> |
| 29 | #include <string.h> |
| 30 | #include <stdio.h> |
| 31 | #include <unistd.h> |
| 32 | #include <signal.h> |
| 33 | |
| 34 | #include <X11/Xlib.h> |
| 35 | #include <X11/Xutil.h> |
| 36 | #include <X11/Xatom.h> |
| 37 | |
| 38 | /* Tweak values for different hw setups */ |
| 39 | |
| 40 | #define FPS 50 |
| 41 | #define RESX 40 |
| 42 | #define RESY 40 |
| 43 | #define TO_MISS_SECS 55 |
| 44 | #define BALLDX 16 |
| 45 | #define BALLDY 4 |
| 46 | |
| 47 | |
| 48 | typedef struct PongClock |
| 49 | { |
| 50 | Display *xdpy; |
| 51 | int xscreen; |
| 52 | Window xwin, xwin_root; |
| 53 | Pixmap backbuffer; |
| 54 | GC xgc; |
| 55 | int xwin_width, xwin_height; |
| 56 | int pixelw, pixelh; |
| 57 | |
| 58 | int ball_x, ball_y, ball_dx, ball_dy; |
| 59 | int bata_y, batb_y; |
| 60 | Bool bata_to_miss, batb_to_miss; |
| 61 | |
| 62 | } |
| 63 | PongClock; |
| 64 | |
| 65 | void |
| 66 | get_time(int *hour, int *min, int *sec) |
| 67 | { |
| 68 | struct timeval tv; |
| 69 | struct tm *localTime = NULL; |
| 70 | time_t actualTime; |
| 71 | |
| 72 | gettimeofday(&tv, 0); |
| 73 | actualTime = tv.tv_sec; |
| 74 | localTime = localtime(&actualTime); |
| 75 | |
| 76 | if (hour) |
| 77 | *hour = localTime->tm_hour; |
| 78 | |
| 79 | if (min) |
| 80 | *min = localTime->tm_min; |
| 81 | |
| 82 | if (sec) |
| 83 | *sec = localTime->tm_sec; |
| 84 | } |
| 85 | |
| 86 | void |
| 87 | draw_rect (PongClock *pong_clock, |
| 88 | int x, |
| 89 | int y, |
| 90 | int width, |
| 91 | int height) |
| 92 | { |
| 93 | XFillRectangle (pong_clock->xdpy, |
| 94 | pong_clock->backbuffer, |
| 95 | pong_clock->xgc, |
| 96 | x * pong_clock->pixelw, |
| 97 | y * pong_clock->pixelh, |
| 98 | width * pong_clock->pixelw, |
| 99 | height * pong_clock->pixelh); |
| 100 | } |
| 101 | |
| 102 | void |
| 103 | draw_field (PongClock *pong_clock) |
| 104 | { |
| 105 | int i; |
| 106 | |
| 107 | draw_rect (pong_clock, 0, 0, RESX+1, 1); |
| 108 | draw_rect (pong_clock, 0, RESY-1, RESX+1, 1); |
| 109 | |
| 110 | for (i=0; i < RESY/2; i++) |
| 111 | draw_rect (pong_clock, (RESX/2)-1, i*2, 2, 1); |
| 112 | } |
| 113 | |
| 114 | void |
| 115 | draw_digit (PongClock *pong_clock, |
| 116 | int x, |
| 117 | int y, |
| 118 | int digit) |
| 119 | { |
| 120 | int digits[] = { 0x1f8c63f, 0x1f21086, 0x1f0fe1f, 0x1f87e1f, 0x1087e31, |
| 121 | 0x1f87c3f, 0x1f8fc3f, 0x84421f, 0x1f8fe3f, 0x1087e3f }; |
| 122 | |
| 123 | XRectangle rects[5*5]; |
| 124 | int i,j,k; |
| 125 | |
| 126 | i = 0; |
| 127 | |
| 128 | for (k=0; k<5; k++) |
| 129 | for (j=0; j<5; j++) |
| 130 | if (digits[digit] & (1 << ((k*5)+j))) |
| 131 | { |
| 132 | rects[i].x = (x + j) * pong_clock->pixelw; |
| 133 | rects[i].y = (y + k) * pong_clock->pixelh; |
| 134 | rects[i].width = pong_clock->pixelw; |
| 135 | rects[i].height = pong_clock->pixelh; |
| 136 | i++; |
| 137 | } |
| 138 | |
| 139 | XFillRectangles (pong_clock->xdpy, |
| 140 | pong_clock->backbuffer, |
| 141 | pong_clock->xgc, |
| 142 | rects, i); |
| 143 | } |
| 144 | |
| 145 | void |
| 146 | draw_time (PongClock *pong_clock) |
| 147 | { |
| 148 | int hour, min; |
| 149 | |
| 150 | get_time(&hour, &min, NULL); |
| 151 | |
| 152 | draw_digit (pong_clock, |
| 153 | (RESX/2) - 14, |
| 154 | 5, |
| 155 | hour / 10 ); |
| 156 | |
| 157 | draw_digit (pong_clock, |
| 158 | (RESX/2) - 8, |
| 159 | 5, |
| 160 | hour % 10 ); |
| 161 | |
| 162 | draw_digit (pong_clock, |
| 163 | (RESX/2) + 3, |
| 164 | 5, |
| 165 | min / 10 ); |
| 166 | |
| 167 | draw_digit (pong_clock, |
| 168 | (RESX/2) + 9, |
| 169 | 5, |
| 170 | min % 10 ); |
| 171 | } |
| 172 | |
| 173 | void |
| 174 | draw_bat_and_ball (PongClock *pong_clock) |
| 175 | { |
| 176 | /* ball */ |
| 177 | |
| 178 | XFillRectangle (pong_clock->xdpy, |
| 179 | pong_clock->backbuffer, |
| 180 | pong_clock->xgc, |
| 181 | pong_clock->ball_x, |
| 182 | pong_clock->ball_y, |
| 183 | pong_clock->pixelw, |
| 184 | pong_clock->pixelh); |
| 185 | |
| 186 | /* bat a */ |
| 187 | |
| 188 | XFillRectangle (pong_clock->xdpy, |
| 189 | pong_clock->backbuffer, |
| 190 | pong_clock->xgc, |
| 191 | 0, |
| 192 | pong_clock->bata_y - (2 * pong_clock->pixelh), |
| 193 | pong_clock->pixelw, |
| 194 | pong_clock->pixelh * 5); |
| 195 | |
| 196 | /* bat b */ |
| 197 | |
| 198 | XFillRectangle (pong_clock->xdpy, |
| 199 | pong_clock->backbuffer, |
| 200 | pong_clock->xgc, |
| 201 | (pong_clock->xwin_width - pong_clock->pixelw), |
| 202 | pong_clock->batb_y - (2 * pong_clock->pixelh), |
| 203 | pong_clock->pixelw, |
| 204 | pong_clock->pixelh * 5); |
| 205 | |
| 206 | } |
| 207 | |
| 208 | void |
| 209 | update_state (PongClock *pong_clock) |
| 210 | { |
| 211 | int sec, min, hour; |
| 212 | |
| 213 | get_time(&hour, &min, &sec); |
| 214 | |
| 215 | /* Check ball is on field and no ones dues to miss a shot. |
| 216 | */ |
| 217 | if ( (pong_clock->ball_x < 0 && !pong_clock->bata_to_miss) |
| 218 | || (pong_clock->ball_x > (pong_clock->xwin_width - pong_clock->pixelw) |
| 219 | && !pong_clock->batb_to_miss) ) |
| 220 | pong_clock->ball_dx *= -1; |
| 221 | |
| 222 | if ((pong_clock->ball_y < pong_clock->pixelh) |
| 223 | || pong_clock->ball_y > (pong_clock->xwin_height - (2*pong_clock->pixelh))) |
| 224 | pong_clock->ball_dy *= -1; |
| 225 | |
| 226 | pong_clock->ball_x += pong_clock->ball_dx; |
| 227 | pong_clock->ball_y += pong_clock->ball_dy; |
| 228 | |
| 229 | /* Set up someone to miss if we getting close to an hour or min. |
| 230 | */ |
| 231 | if (sec > TO_MISS_SECS) |
| 232 | { |
| 233 | if (min == 59) |
| 234 | pong_clock->batb_to_miss = True; |
| 235 | else |
| 236 | pong_clock->bata_to_miss = True; |
| 237 | } |
| 238 | else |
| 239 | { |
| 240 | /* Reset the game */ |
| 241 | if (pong_clock->bata_to_miss) |
| 242 | { |
| 243 | pong_clock->bata_to_miss = False; |
| 244 | pong_clock->ball_y = pong_clock->bata_y; |
| 245 | pong_clock->ball_x = pong_clock->pixelw; |
| 246 | pong_clock->ball_dx *= -1; |
| 247 | } |
| 248 | |
| 249 | if (pong_clock->batb_to_miss) |
| 250 | { |
| 251 | pong_clock->batb_to_miss = False; |
| 252 | pong_clock->ball_y = pong_clock->batb_y; |
| 253 | pong_clock->ball_x = pong_clock->xwin_width - pong_clock->pixelw; |
| 254 | pong_clock->ball_dx *= -1; |
| 255 | } |
| 256 | } |
| 257 | |
| 258 | /* Keep bats on field and only move in not setup to miss */ |
| 259 | if (pong_clock->ball_y >= (3*pong_clock->pixelh) |
| 260 | && pong_clock->ball_y <= (pong_clock->xwin_height - (5*pong_clock->pixelh))) |
| 261 | { |
| 262 | if (!pong_clock->batb_to_miss) |
| 263 | pong_clock->batb_y = pong_clock->ball_y; |
| 264 | |
| 265 | if (!pong_clock->bata_to_miss) |
| 266 | pong_clock->bata_y = pong_clock->ball_y; |
| 267 | } |
| 268 | } |
| 269 | |
| 270 | void |
| 271 | draw_frame (PongClock *pong_clock) |
| 272 | { |
| 273 | update_state (pong_clock); |
| 274 | |
| 275 | /* Clear playfield */ |
| 276 | XSetForeground (pong_clock->xdpy, |
| 277 | pong_clock->xgc, |
| 278 | BlackPixel(pong_clock->xdpy, |
| 279 | pong_clock->xscreen)); |
| 280 | |
| 281 | XFillRectangle (pong_clock->xdpy, |
| 282 | pong_clock->backbuffer, |
| 283 | pong_clock->xgc, |
| 284 | 0, 0, |
| 285 | pong_clock->xwin_width, |
| 286 | pong_clock->xwin_height); |
| 287 | |
| 288 | XSetForeground (pong_clock->xdpy, |
| 289 | pong_clock->xgc, |
| 290 | WhitePixel(pong_clock->xdpy, |
| 291 | pong_clock->xscreen)); |
| 292 | |
| 293 | draw_field (pong_clock); |
| 294 | |
| 295 | draw_time (pong_clock); |
| 296 | |
| 297 | draw_bat_and_ball (pong_clock); |
| 298 | |
| 299 | /* flip 'backbuffer' */ |
| 300 | XSetWindowBackgroundPixmap (pong_clock->xdpy, |
| 301 | pong_clock->xwin, |
| 302 | pong_clock->backbuffer); |
| 303 | XClearWindow(pong_clock->xdpy, pong_clock->xwin); |
| 304 | |
| 305 | XSync(pong_clock->xdpy, False); |
| 306 | } |
| 307 | |
| 308 | int |
| 309 | main (int argc, char **argv) |
| 310 | { |
| 311 | XGCValues gcv; |
| 312 | Atom atoms_WINDOW_STATE, atoms_WINDOW_STATE_FULLSCREEN; |
| 313 | PongClock *pong_clock; |
| 314 | |
| 315 | pong_clock = malloc(sizeof(PongClock)); |
| 316 | memset(pong_clock, 0, sizeof(PongClock)); |
| 317 | |
| 318 | if ((pong_clock->xdpy = XOpenDisplay(getenv("DISPLAY"))) == NULL) { |
| 319 | fprintf(stderr, "Cannot connect to X server on display %s.", |
| 320 | getenv("DISPLAY")); |
| 321 | exit(-1); |
| 322 | } |
| 323 | |
| 324 | pong_clock->xscreen = DefaultScreen(pong_clock->xdpy); |
| 325 | pong_clock->xwin_root = DefaultRootWindow(pong_clock->xdpy); |
| 326 | pong_clock->xwin_width = DisplayWidth(pong_clock->xdpy, |
| 327 | pong_clock->xscreen); |
| 328 | pong_clock->xwin_height = DisplayHeight(pong_clock->xdpy, |
| 329 | pong_clock->xscreen); |
| 330 | |
| 331 | pong_clock->pixelw = pong_clock->xwin_width / RESX; |
| 332 | pong_clock->pixelh = pong_clock->xwin_height / RESY; |
| 333 | |
| 334 | pong_clock->ball_x = 0; |
| 335 | pong_clock->ball_y = pong_clock->xwin_height / 2; |
| 336 | |
| 337 | pong_clock->ball_dx = BALLDX; |
| 338 | pong_clock->ball_dy = BALLDY; |
| 339 | |
| 340 | pong_clock->batb_y = pong_clock->bata_y = pong_clock->ball_y; |
| 341 | |
| 342 | gcv.background = BlackPixel(pong_clock->xdpy, |
| 343 | pong_clock->xscreen); |
| 344 | gcv.foreground = WhitePixel(pong_clock->xdpy, |
| 345 | pong_clock->xscreen); |
| 346 | gcv.graphics_exposures = False; |
| 347 | |
| 348 | pong_clock->xgc = XCreateGC (pong_clock->xdpy, pong_clock->xwin_root, |
| 349 | GCForeground|GCBackground|GCGraphicsExposures, |
| 350 | &gcv); |
| 351 | |
| 352 | atoms_WINDOW_STATE |
| 353 | = XInternAtom(pong_clock->xdpy, "_NET_WM_STATE",False); |
| 354 | atoms_WINDOW_STATE_FULLSCREEN |
| 355 | = XInternAtom(pong_clock->xdpy, "_NET_WM_STATE_FULLSCREEN",False); |
| 356 | |
| 357 | pong_clock->xwin = XCreateSimpleWindow(pong_clock->xdpy, |
| 358 | pong_clock->xwin_root, |
| 359 | 0, 0, |
| 360 | pong_clock->xwin_width, |
| 361 | pong_clock->xwin_height, |
| 362 | 0, |
| 363 | WhitePixel(pong_clock->xdpy, |
| 364 | pong_clock->xscreen), |
| 365 | BlackPixel(pong_clock->xdpy, |
| 366 | pong_clock->xscreen)); |
| 367 | |
| 368 | pong_clock->backbuffer = XCreatePixmap(pong_clock->xdpy, |
| 369 | pong_clock->xwin_root, |
| 370 | pong_clock->xwin_width, |
| 371 | pong_clock->xwin_height, |
| 372 | DefaultDepth(pong_clock->xdpy, |
| 373 | pong_clock->xscreen)); |
| 374 | |
| 375 | XSelectInput(pong_clock->xdpy, pong_clock->xwin, KeyPressMask); |
| 376 | |
| 377 | |
| 378 | /* Set the hints for fullscreen */ |
| 379 | XChangeProperty(pong_clock->xdpy, |
| 380 | pong_clock->xwin, |
| 381 | atoms_WINDOW_STATE, |
| 382 | XA_ATOM, |
| 383 | 32, |
| 384 | PropModeReplace, |
| 385 | (unsigned char *) &atoms_WINDOW_STATE_FULLSCREEN, 1); |
| 386 | |
| 387 | XMapWindow(pong_clock->xdpy, pong_clock->xwin); |
| 388 | |
| 389 | while (True) |
| 390 | { |
| 391 | struct timeval timeout; |
| 392 | XEvent xev; |
| 393 | |
| 394 | timeout.tv_sec = 0; |
| 395 | timeout.tv_usec = 1000000 / FPS; |
| 396 | select (0, NULL, NULL, NULL, &timeout); |
| 397 | |
| 398 | draw_frame (pong_clock); |
| 399 | |
| 400 | XFlush(pong_clock->xdpy); |
| 401 | |
| 402 | if (XPending(pong_clock->xdpy)) |
| 403 | { |
| 404 | if (XCheckMaskEvent(pong_clock->xdpy, |
| 405 | KeyPressMask, |
| 406 | &xev)) |
| 407 | exit(-1); |
| 408 | } |
| 409 | } |
| 410 | } |