*
* Vivek Khera <khera@cs.duke.edu>
* 5-AUG-1993
+ *
+ * Hacked by jwz, 28-Nov-97 (sped up and added new motion directions)
*/
#include "screenhack.h"
static int sizex, sizey;
static int delay;
static GC gc;
+static int mode;
+
+#define SHUFFLE 0
+#define UP 1
+#define LEFT 2
+#define RIGHT 3
+#define DOWN 4
+#define UPLEFT 5
+#define DOWNLEFT 6
+#define UPRIGHT 7
+#define DOWNRIGHT 8
+#define IN 9
+#define OUT 10
+
static void
init_decay (Display *dpy, Window window)
{
XGCValues gcv;
XWindowAttributes xgwa;
+ long gcflags;
+
+ char *s = get_string_resource("mode", "Mode");
+ if (s && !strcmp(s, "shuffle")) mode = SHUFFLE;
+ else if (s && !strcmp(s, "up")) mode = UP;
+ else if (s && !strcmp(s, "left")) mode = LEFT;
+ else if (s && !strcmp(s, "right")) mode = RIGHT;
+ else if (s && !strcmp(s, "down")) mode = DOWN;
+ else if (s && !strcmp(s, "upleft")) mode = UPLEFT;
+ else if (s && !strcmp(s, "downleft")) mode = DOWNLEFT;
+ else if (s && !strcmp(s, "upright")) mode = UPRIGHT;
+ else if (s && !strcmp(s, "downright")) mode = DOWNRIGHT;
+ else if (s && !strcmp(s, "in")) mode = IN;
+ else if (s && !strcmp(s, "out")) mode = OUT;
+ else {
+ if (s && *s && !!strcmp(s, "random"))
+ fprintf(stderr, "%s: unknown mode %s\n", progname, s);
+ mode = random() % (OUT+1);
+ }
delay = get_integer_resource ("delay", "Integer");
gcv.function = GXcopy;
gcv.subwindow_mode = IncludeInferiors;
- gc = XCreateGC (dpy, window, GCForeground |GCFunction | GCSubwindowMode,
- &gcv);
+ gcflags = GCForeground |GCFunction;
+ if (use_subwindow_mode_p(xgwa.screen, window)) /* see grabscreen.c */
+ gcflags |= GCSubwindowMode;
+ gc = XCreateGC (dpy, window, gcflags, &gcv);
XGetWindowAttributes (dpy, window, &xgwa);
sizex = xgwa.width;
static void
decay1 (Display *dpy, Window window)
{
- int left, top, width, height;
+ int left, top, width, height, toleft, totop;
+
+#define L 101
+#define R 102
+#define U 103
+#define D 104
+ static int no_bias[] = { L,L,L,L, R,R,R,R, U,U,U,U, D,D,D,D };
+ static int up_bias[] = { L,L,L,L, R,R,R,R, U,U,U,U, U,U,D,D };
+ static int down_bias[] = { L,L,L,L, R,R,R,R, U,U,D,D, D,D,D,D };
+ static int left_bias[] = { L,L,L,L, L,L,R,R, U,U,U,U, D,D,D,D };
+ static int right_bias[] = { L,L,R,R, R,R,R,R, U,U,U,U, D,D,D,D };
+
+ static int upleft_bias[] = { L,L,L,L, L,R,R,R, U,U,U,U, U,D,D,D };
+ static int downleft_bias[] = { L,L,L,L, L,R,R,R, U,U,U,D, D,D,D,D };
+ static int upright_bias[] = { L,L,L,R, R,R,R,R, U,U,U,U, U,D,D,D };
+ static int downright_bias[] = { L,L,L,R, R,R,R,R, U,U,U,D, D,D,D,D };
+ static int *bias;
+
+ switch (mode) {
+ case SHUFFLE: bias = no_bias; break;
+ case UP: bias = up_bias; break;
+ case LEFT: bias = left_bias; break;
+ case RIGHT: bias = right_bias; break;
+ case DOWN: bias = down_bias; break;
+ case UPLEFT: bias = upleft_bias; break;
+ case DOWNLEFT: bias = downleft_bias; break;
+ case UPRIGHT: bias = upright_bias; break;
+ case DOWNRIGHT: bias = downright_bias; break;
+ case IN: bias = no_bias; break;
+ case OUT: bias = no_bias; break;
+ default: abort();
+ }
#define nrnd(x) (random() % (x))
- switch (random() % 8) {
- case 0: /* move a block left */
- case 1:
- left = nrnd(sizex - 1) + 1;
- top = nrnd(sizey);
- width = nrnd(sizex - left);
- height = nrnd(sizey - top);
- XCopyArea (dpy, window, window, gc, left, top, width, height,
- left - 1, top);
- break;
- case 2: /* move a block right */
- case 3:
- left = nrnd(sizex - 1);
- top = nrnd(sizey);
- width = nrnd(sizex - 1 - left);
- height = nrnd(sizey - top);
- XCopyArea (dpy, window, window, gc, left, top, width, height,
- left + 1, top);
- break;
- case 4: /* move a block up */
- left = nrnd(sizex);
- top = nrnd(sizey - 1) + 1;
- width = nrnd(sizex - left);
- height = nrnd(sizey - top);
- XCopyArea (dpy, window, window, gc, left, top, width, height,
- left, top - 1);
- break;
- default: /* move block down (biased to this) */
- left = nrnd(sizex);
- top = nrnd(sizey - 1);
- width = nrnd(sizex - left);
- height = nrnd(sizey - 1 - top);
- XCopyArea (dpy, window, window, gc, left, top, width, height,
- left, top + 1);
- break;
+ left = nrnd(sizex - 1);
+ top = nrnd(sizey);
+ width = nrnd(sizex - left);
+ height = nrnd(sizey - top);
+
+ toleft = left;
+ totop = top;
+
+ if (mode == IN || mode == OUT) {
+ int x = left+(width/2);
+ int y = top+(height/2);
+ int cx = sizex/2;
+ int cy = sizey/2;
+ if (mode == IN) {
+ if (x > cx && y > cy) bias = upleft_bias;
+ else if (x < cx && y > cy) bias = upright_bias;
+ else if (x < cx && y < cy) bias = downright_bias;
+ else /* (x > cx && y < cy)*/ bias = downleft_bias;
+ } else {
+ if (x > cx && y > cy) bias = downright_bias;
+ else if (x < cx && y > cy) bias = downleft_bias;
+ else if (x < cx && y < cy) bias = upleft_bias;
+ else /* (x > cx && y < cy)*/ bias = upright_bias;
+ }
}
- XSync (dpy, True);
+
+ switch (bias[random() % (sizeof(no_bias)/sizeof(*no_bias))]) {
+ case L: toleft = left-1; break;
+ case R: toleft = left+1; break;
+ case U: totop = top-1; break;
+ case D: totop = top+1; break;
+ default: abort(); break;
+ }
+
+ XCopyArea (dpy, window, window, gc, left, top, width, height,
+ toleft, totop);
#undef nrnd
}
"*visualID: Best",
#endif
- "*delay: 10",
+ "*delay: 10000",
+ "*mode: random",
0
};
XrmOptionDescRec options [] = {
{ "-delay", ".delay", XrmoptionSepArg, 0 },
+ { "-mode", ".mode", XrmoptionSepArg, 0 },
{ 0, 0, 0, 0 }
};
{
init_decay (dpy, window);
while (1) {
+ int i;
+ for (i = 0; i < 100; i++)
decay1 (dpy, window);
- if (delay) usleep (delay);
+ XSync(dpy, False);
+ if (delay) usleep (delay);
}
}
projects / xscreensaver / blobdiff