2 * CDE - Common Desktop Environment
4 * Copyright (c) 1993-2012, The Open Group. All rights reserved.
6 * These libraries and programs are free software; you can
7 * redistribute them and/or modify them under the terms of the GNU
8 * Lesser General Public License as published by the Free Software
9 * Foundation; either version 2 of the License, or (at your option)
12 * These libraries and programs are distributed in the hope that
13 * they will be useful, but WITHOUT ANY WARRANTY; without even the
14 * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
15 * PURPOSE. See the GNU Lesser General Public License for more
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with these librararies and programs; if not, write
20 * to the Free Software Foundation, Inc., 51 Franklin Street, Fifth
21 * Floor, Boston, MA 02110-1301 USA
23 /* $XConsortium: worm.c /main/3 1995/11/02 16:09:04 rswiston $ */
27 * (c) Copyright 1993, 1994 Hewlett-Packard Company *
28 * (c) Copyright 1993, 1994 International Business Machines Corp. *
29 * (c) Copyright 1993, 1994 Sun Microsystems, Inc. *
30 * (c) Copyright 1993, 1994 Novell, Inc. *
33 * worm.c - draw wiggly worms.
35 * Copyright (c) 1991 by Patrick J. Naughton.
37 * See dtscreen.c for copying information.
40 * 27-Sep-91: got rid of all malloc calls since there were no calls to free().
41 * 25-Sep-91: Integrated into X11R5 contrib dtscreen.
43 * Adapted from a concept in the Dec 87 issue of Scientific American.
45 * SunView version: Brad Taylor (brad@sun.com)
46 * X11 version: Dave Lemke (lemke@ncd.com)
47 * xlock version: Boris Putanec (bp@cs.brown.edu)
49 * This code is a static memory pig... like almost 200K... but as contributed
50 * it leaked at a massive rate, so I made everything static up front... feel
51 * free to contribute the proper memory management code.
64 #define PI 3.14159265358979323844
66 static int sintab[SEGMENTS];
67 static int costab[SEGMENTS];
68 static int init_table = 0;
71 int xcirc[MAXWORMLEN];
72 int ycirc[MAXWORMLEN];
86 wormstuff worm[MAXWORMS];
87 XRectangle rects[MAXCOLORS][MAXWORMS];
91 #if !defined(CSRG_BASED)
96 return ((int) floor((double) x));
102 worm_doit(pwin, wp, which, color)
108 wormstuff *ws = &wp->worm[which];
112 if (ws->tail == wp->wormlength)
115 x = ws->xcirc[ws->tail];
116 y = ws->ycirc[ws->tail];
117 XClearArea(dsp, pwin->w, x, y, CIRCSIZE, CIRCSIZE, False);
120 ws->dir = (ws->dir + 1) % SEGMENTS;
122 ws->dir = (ws->dir + SEGMENTS - 1) % SEGMENTS;
125 x = (ws->x + costab[ws->dir] + wp->xsize) % wp->xsize;
126 y = (ws->y + sintab[ws->dir] + wp->ysize) % wp->ysize;
128 ws->xcirc[ws->tail] = x;
129 ws->ycirc[ws->tail] = y;
133 wp->rects[color][wp->size[color]].x = x;
134 wp->rects[color][wp->size[color]].y = y;
145 XWindowAttributes xwa;
147 if (pwin->data) free(pwin->data);
148 pwin->data = (void *)malloc(sizeof(wormstruct));
149 memset(pwin->data, '\0', sizeof(wormstruct));
150 wp = (wormstruct *)pwin->data;
151 wp->nc = pwin->perscreen->npixels;
152 if (wp->nc > MAXCOLORS)
156 if (wp->nw > MAXWORMS)
161 for (i = 0; i < SEGMENTS; i++) {
162 sintab[i] = round(CIRCSIZE * sin(i * 2 * PI / SEGMENTS));
163 costab[i] = round(CIRCSIZE * cos(i * 2 * PI / SEGMENTS));
166 XGetWindowAttributes(dsp, pwin->w, &xwa);
167 wp->xsize = xwa.width;
168 wp->ysize = xwa.height;
170 if (xwa.width < 100) {
171 wp->monopix = BlackPixelOfScreen(pwin->perscreen->screen);
172 wp->wormlength = MAXWORMLEN / 10;
174 wp->monopix = WhitePixelOfScreen(pwin->perscreen->screen);
175 wp->wormlength = MAXWORMLEN;
178 for (i = 0; i < wp->nc; i++) {
179 for (j = 0; j < wp->nw / wp->nc + 1; j++) {
180 wp->rects[i][j].width = CIRCSIZE;
181 wp->rects[i][j].height = CIRCSIZE;
184 memset(wp->size, '\0', wp->nc * sizeof(int));
186 for (i = 0; i < wp->nw; i++) {
187 for (j = 0; j < wp->wormlength; j++) {
188 wp->worm[i].xcirc[j] = wp->xsize / 2;
189 wp->worm[i].ycirc[j] = wp->ysize / 2;
191 wp->worm[i].dir = (unsigned) random() % SEGMENTS;
192 wp->worm[i].tail = 0;
193 wp->worm[i].x = wp->xsize / 2;
194 wp->worm[i].y = wp->ysize / 2;
197 XClearWindow(dsp, pwin->w);
206 wormstruct *wp = (wormstruct *)pwin->data;
208 static unsigned int chromo = 0;
210 memset(wp->size, '\0', wp->nc * sizeof(int));
212 for (i = 0; i < wp->nw; i++) {
213 if (!mono && wp->nc > 2) {
214 wcolor = (i + chromo) % wp->nc;
216 worm_doit(pwin, wp, i, wcolor);
218 worm_doit(pwin, wp, i, 0);
221 if (!mono && wp->nc > 2) {
222 for (i = 0; i < wp->nc; i++) {
223 XSetForeground(dsp, pwin->gc, pwin->perscreen->pixels[i]);
224 XFillRectangles(dsp, pwin->w, pwin->gc, wp->rects[i],
228 XSetForeground(dsp, pwin->gc, wp->monopix);
229 XFillRectangles(dsp, pwin->w, pwin->gc, wp->rects[0],
233 if (++chromo == wp->nc)