#define PROB(x) (frand(1.0) < (x))
#define NCOLORSMAX 255
-static int width, height, count, cycle;
-static double frac, disorder, handedness;
-static int ncolors=0;
-static GC draw_gc, erase_gc;
-static XColor colors[NCOLORSMAX];
#define STATES 8
/* 0- 3 left-winding */
/* 4- 7 right-winding */
-#define CLEAR1(x,y) (!fill[((y)%height)*width+(x)%width])
-#define MOVE1(x,y) (fill[((y)%height)*width+(x)%width]=1, XDrawPoint(dpy, window, draw_gc, (x)%width,(y)%height), cov++)
+struct worm {
+ int h;
+ int v;
+ int s;
+ int c;
+ int cc;
+};
+
+
+struct state {
+ Display *dpy;
+ Window window;
+
+ int width, height, count, cycle;
+ double frac, disorder, handedness;
+ int ncolors;
+ GC draw_gc, erase_gc;
+ XColor colors[NCOLORSMAX];
+
+ int delay;
-static int cov;
-static int dirh[4];
-static int dirv[4];
+ int cov;
+ int dirh[4];
+ int dirv[4];
-static int *fill;
+ int *fill;
+
+ struct worm *worms;
+ int inclear;
+};
+
+#define CLEAR1(x,y) (!st->fill[((y)%st->height)*st->width+(x)%st->width])
+#define MOVE1(x,y) (st->fill[((y)%st->height)*st->width+(x)%st->width]=1, XDrawPoint(st->dpy, st->window, st->draw_gc, (x)%st->width,(y)%st->height), st->cov++)
#define CLEARDXY(x,y,dx,dy) CLEAR1(x+dx, y+dy) && CLEAR1(x+dx+dx, y+dy+dy)
#define MOVEDXY(x,y,dx,dy) MOVE1 (x+dx, y+dy), MOVE1 (x+dx+dx, y+dy+dy)
-#define CLEAR(d) CLEARDXY(w->h,w->v, dirh[d],dirv[d])
-#define MOVE(d) (XSetForeground(dpy, draw_gc, colors[w->c].pixel), \
- MOVEDXY(w->h,w->v, dirh[d],dirv[d]), \
- w->h=w->h+dirh[d]*2, \
- w->v=w->v+dirv[d]*2, dir=d)
+#define CLEAR(d) CLEARDXY(w->h,w->v, st->dirh[d],st->dirv[d])
+#define MOVE(d) (XSetForeground(st->dpy, st->draw_gc, st->colors[w->c].pixel), \
+ MOVEDXY(w->h,w->v, st->dirh[d],st->dirv[d]), \
+ w->h=w->h+st->dirh[d]*2, \
+ w->v=w->v+st->dirv[d]*2, dir=d)
+
+#define RANDOM (void) (w->h = R(st->width), w->v = R(st->height), w->c = R(st->ncolors), \
+ type=R(2), dir=R(4), (st->cycle && (w->cc=R(3)+st->ncolors)))
-#define RANDOM (void) (w->h = R(width), w->v = R(height), w->c = R(ncolors), \
- type=R(2), dir=R(4), (cycle && (w->cc=R(3)+ncolors)))
-struct worm {
- int h;
- int v;
- int s;
- int c;
- int cc;
-} *worms;
#define SUCC(x) ((x+1)%4)
#define PRED(x) ((x+3)%4)
#define TRY(x) if (CLEAR(x)) { MOVE(x); break; }
static void
-do_worm(Display *dpy, Window window, struct worm *w)
+do_worm(struct state *st, struct worm *w)
{
int type = w->s / 4;
int dir = w->s % 4;
- w->c = (w->c+w->cc) % ncolors;
+ w->c = (w->c+w->cc) % st->ncolors;
- if (PROB(disorder)) type=PROB(handedness);
+ if (PROB(st->disorder)) type=PROB(st->handedness);
switch(type) {
case 0: /* CCW */
TRY(CCW)
break;
}
w->s = type*4+dir;
- w->h = w->h % width;
- w->v = w->v % height;
+ w->h = w->h % st->width;
+ w->v = w->v % st->height;
}
-static void
-init_squiral(Display *dpy, Window window)
+static void *
+squiral_init (Display *dpy, Window window)
{
+ struct state *st = (struct state *) calloc (1, sizeof(*st));
XGCValues gcv;
Colormap cmap;
XWindowAttributes xgwa;
Bool writeable = False;
int i;
- XClearWindow(dpy, window);
- XGetWindowAttributes(dpy, window, &xgwa);
- width = xgwa.width;
- height = xgwa.height;
+ st->dpy = dpy;
+ st->window = window;
+
+ st->delay= get_integer_resource(st->dpy, "delay", "Integer");
+
+ XClearWindow(st->dpy, st->window);
+ XGetWindowAttributes(st->dpy, st->window, &xgwa);
+ st->width = xgwa.width;
+ st->height = xgwa.height;
cmap = xgwa.colormap;
- gcv.foreground = get_pixel_resource("foreground",
- "Foreground", dpy, cmap);
- draw_gc = XCreateGC(dpy, window, GCForeground, &gcv);
- gcv.foreground = get_pixel_resource ("background", "Background",dpy, cmap);
- erase_gc = XCreateGC (dpy, window, GCForeground, &gcv);
+ gcv.foreground = get_pixel_resource(st->dpy, cmap, "foreground",
+ "Foreground");
+ st->draw_gc = XCreateGC(st->dpy, st->window, GCForeground, &gcv);
+ gcv.foreground = get_pixel_resource (st->dpy, cmap, "background", "Background");
+ st->erase_gc = XCreateGC (st->dpy, st->window, GCForeground, &gcv);
cmap = xgwa.colormap;
- if( ncolors ) {
- free_colors(dpy, cmap, colors, ncolors);
- ncolors = 0;
+ if( st->ncolors ) {
+ free_colors(st->dpy, cmap, st->colors, st->ncolors);
+ st->ncolors = 0;
}
if( mono_p ) {
- ncolors=1;
- colors[0].pixel=get_pixel_resource("foreground","Foreground", dpy, cmap);
+ st->ncolors=1;
+ st->colors[0].pixel=get_pixel_resource(st->dpy, cmap, "foreground","Foreground");
} else {
- ncolors = get_integer_resource("ncolors", "Integer");
- if (ncolors < 0 || ncolors > NCOLORSMAX)
- ncolors = NCOLORSMAX;
- make_uniform_colormap(dpy, xgwa.visual, cmap, colors, &ncolors, True,
+ st->ncolors = get_integer_resource(st->dpy, "ncolors", "Integer");
+ if (st->ncolors < 0 || st->ncolors > NCOLORSMAX)
+ st->ncolors = NCOLORSMAX;
+ make_uniform_colormap(st->dpy, xgwa.visual, cmap, st->colors, &st->ncolors, True,
&writeable, False);
- if (ncolors <= 0) {
- ncolors = 1;
- colors[0].pixel=get_pixel_resource("foreground","Foreground",dpy, cmap);
+ if (st->ncolors <= 0) {
+ st->ncolors = 1;
+ st->colors[0].pixel=get_pixel_resource(st->dpy, cmap, "foreground","Foreground");
}
}
- count= get_integer_resource("count", "Integer");
- frac = get_integer_resource("fill", "Integer")*0.01;
- cycle= get_boolean_resource("cycle", "Cycle");
- disorder=get_float_resource("disorder", "Float");
- handedness=get_float_resource("handedness", "Float");
-
- if(frac<0.01) frac=0.01;
- if(frac>0.99) frac=0.99;
- if(count==0) count=width/32;
- if(count<1) count=1;
- if(count>1000) count=1000;
-
- if(worms) free(worms);
- if(fill) free(fill);
-
- worms=calloc(count, sizeof(struct worm));
- fill=calloc(width*height, sizeof(int));
-
- dirh[0]=0; dirh[1]=1; dirh[2]=0; dirh[3]=width-1;
- dirv[0]=height-1; dirv[1]=0; dirv[2]=1; dirv[3]=0;
- for(i=0;i<count;i++) {
- worms[i].h=R(width);
- worms[i].v=R(height);
- worms[i].s=R(4)+4*PROB(handedness);
- worms[i].c=R(ncolors);
- if(cycle) { worms[i].cc=R(3)+ncolors; }
- else worms[i].cc=0;
+ st->count= get_integer_resource(st->dpy, "count", "Integer");
+ st->frac = get_integer_resource(st->dpy, "fill", "Integer")*0.01;
+ st->cycle= get_boolean_resource(st->dpy, "cycle", "Cycle");
+ st->disorder=get_float_resource(st->dpy, "disorder", "Float");
+ st->handedness=get_float_resource(st->dpy, "handedness", "Float");
+
+ if(st->frac<0.01) st->frac=0.01;
+ if(st->frac>0.99) st->frac=0.99;
+ if(st->count==0) st->count=st->width/32;
+ if(st->count<1) st->count=1;
+ if(st->count>1000) st->count=1000;
+
+ if(st->worms) free(st->worms);
+ if(st->fill) free(st->fill);
+
+ st->worms=calloc(st->count, sizeof(struct worm));
+ st->fill=calloc(st->width*st->height, sizeof(int));
+
+ st->dirh[0]=0; st->dirh[1]=1; st->dirh[2]=0; st->dirh[3]=st->width-1;
+ st->dirv[0]=st->height-1; st->dirv[1]=0; st->dirv[2]=1; st->dirv[3]=0;
+ for(i=0;i<st->count;i++) {
+ st->worms[i].h=R(st->width);
+ st->worms[i].v=R(st->height);
+ st->worms[i].s=R(4)+4*PROB(st->handedness);
+ st->worms[i].c=R(st->ncolors);
+ if(st->cycle) { st->worms[i].cc=R(3)+st->ncolors; }
+ else st->worms[i].cc=0;
}
+
+ return st;
}
-void
-screenhack(Display *dpy, Window window)
+static unsigned long
+squiral_draw (Display *dpy, Window window, void *closure)
{
- int inclear, i;
- int delay= get_integer_resource("delay", "Integer");
- init_squiral(dpy, window);
- cov=0; inclear=height;
- while(1) {
- if(inclear<height) {
- XDrawLine(dpy, window, erase_gc, 0, inclear, width-1, inclear);
- memset(&fill[inclear*width], 0, sizeof(int)*width);
- XDrawLine(dpy, window, erase_gc, 0, height-inclear-1, width-1,
- height-inclear-1);
- memset(&fill[(height-inclear-1)*width], 0, sizeof(int)*width);
- inclear++;
- XDrawLine(dpy, window, erase_gc, 0, inclear, width-1, inclear);
- memset(&fill[inclear*width], 0, sizeof(int)*width);
- XDrawLine(dpy, window, erase_gc, 0, height-inclear-1, width-1,
- height-inclear-1);
- memset(&fill[(height-inclear-1)*width], 0, sizeof(int)*width);
- inclear++;
- if(inclear>height/2) inclear=height;
- }
- else if(cov>(frac*width*height)) {
- inclear=0;
- cov=0;
- }
- for(i=0;i<count;i++) do_worm(dpy, window, &worms[i]);
- screenhack_handle_events(dpy);
- usleep(delay);
- }
+ struct state *st = (struct state *) closure;
+ int i;
+
+ if(st->inclear<st->height) {
+ XDrawLine(st->dpy, st->window, st->erase_gc, 0, st->inclear, st->width-1, st->inclear);
+ memset(&st->fill[st->inclear*st->width], 0, sizeof(int)*st->width);
+ XDrawLine(st->dpy, st->window, st->erase_gc, 0, st->height-st->inclear-1, st->width-1,
+ st->height-st->inclear-1);
+ memset(&st->fill[(st->height-st->inclear-1)*st->width], 0, sizeof(int)*st->width);
+ st->inclear++;
+ XDrawLine(st->dpy, st->window, st->erase_gc, 0, st->inclear, st->width-1, st->inclear);
+ memset(&st->fill[st->inclear*st->width], 0, sizeof(int)*st->width);
+ XDrawLine(st->dpy, st->window, st->erase_gc, 0, st->height-st->inclear-1, st->width-1,
+ st->height-st->inclear-1);
+ memset(&st->fill[(st->height-st->inclear-1)*st->width], 0, sizeof(int)*st->width);
+ st->inclear++;
+ if(st->inclear>st->height/2) st->inclear=st->height;
+ }
+ else if(st->cov>(st->frac*st->width*st->height)) {
+ st->inclear=0;
+ st->cov=0;
+ }
+ for(i=0;i<st->count;i++) do_worm(st, &st->worms[i]);
+ return st->delay;
}
-char *progclass="Squiral";
+static void
+squiral_reshape (Display *dpy, Window window, void *closure,
+ unsigned int w, unsigned int h)
+{
+}
+
+static Bool
+squiral_event (Display *dpy, Window window, void *closure, XEvent *event)
+{
+ return False;
+}
+
+static void
+squiral_free (Display *dpy, Window window, void *closure)
+{
+ struct state *st = (struct state *) closure;
+ free (st);
+}
-char *defaults[] = {
+
+static const char *squiral_defaults[] = {
".background: black",
".foreground: white",
"*fill: 75",
0
};
-XrmOptionDescRec options[] = {
+static XrmOptionDescRec squiral_options[] = {
{"-fill", ".fill", XrmoptionSepArg, 0},
{"-count", ".count", XrmoptionSepArg, 0},
{"-delay", ".delay", XrmoptionSepArg, 0},
{"-no-cycle", ".cycle", XrmoptionNoArg, "False"},
{ 0, 0, 0, 0 }
};
+
+XSCREENSAVER_MODULE ("Squiral", squiral)
projects / xscreensaver / blobdiff