-/* xscreensaver, Copyright (c) 1992 Jamie Zawinski <jwz@lucid.com>
+/* xscreensaver, Copyright (c) 1992-2018 Jamie Zawinski <jwz@jwz.org>
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
*
* Vivek Khera <khera@cs.duke.edu>
* 5-AUG-1993
+ *
+ * Hacked by jwz, 28-Nov-97 (sped up and added new motion directions)
+
+ * R. Schultz
+ * Added "melt" & "stretch" modes 28-Mar-1999
+ *
*/
#include "screenhack.h"
+#include <time.h>
-static int sizex, sizey;
-static int delay;
-static GC gc;
+struct state {
+ Display *dpy;
+ Window window;
+ XWindowAttributes xgwa;
+ Pixmap saved;
+ int saved_w, saved_h;
-static Bool
-MapNotify_event_p (dpy, event, window)
- Display *dpy;
- XEvent *event;
- XPointer window;
-{
- return (event->xany.type == MapNotify &&
- event->xvisibility.window == (Window) window);
-}
+ int sizex, sizey;
+ int delay;
+ int duration;
+ GC gc;
+ int mode;
+ int random_p;
+ time_t start_time;
+ int fuzz_toggle;
+ const int *current_bias;
-static Bool
-screensaver_window_p (dpy, window)
- Display *dpy;
- Window window;
+ async_load_state *img_loader;
+};
+
+
+#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
+#define MELT 11
+#define STRETCH 12
+#define FUZZ 13
+
+static void
+decayscreen_load_image (struct state *st)
{
- Atom type;
- int format;
- unsigned long nitems, bytesafter;
- char *version;
- if (XGetWindowProperty (dpy, window,
- XInternAtom (dpy, "_SCREENSAVER_VERSION", False),
- 0, 1, False, XA_STRING,
- &type, &format, &nitems, &bytesafter,
- (unsigned char **) &version)
- == Success
- && type != None)
- return True;
- return False;
+ XWindowAttributes xgwa;
+ XGetWindowAttributes (st->dpy, st->window, &xgwa);
+ st->sizex = xgwa.width;
+ st->sizey = xgwa.height;
+ if (st->img_loader) abort();
+
+ st->img_loader = load_image_async_simple (0, xgwa.screen, st->window,
+ st->window, 0, 0);
}
-static void
-init_decay (dpy, window)
- Display *dpy;
- Window window;
+static void *
+decayscreen_init (Display *dpy, Window window)
{
+ struct state *st = (struct state *) calloc (1, sizeof(*st));
XGCValues gcv;
- XWindowAttributes xgwa;
- int root_p;
- Pixmap pixmap;
+ long gcflags;
+ unsigned long bg;
+ char *s;
+
+ st->dpy = dpy;
+ st->window = window;
+ st->random_p = 0;
+
+ s = get_string_resource(st->dpy, "mode", "Mode");
+ if (s && !strcmp(s, "shuffle")) st->mode = SHUFFLE;
+ else if (s && !strcmp(s, "up")) st->mode = UP;
+ else if (s && !strcmp(s, "left")) st->mode = LEFT;
+ else if (s && !strcmp(s, "right")) st->mode = RIGHT;
+ else if (s && !strcmp(s, "down")) st->mode = DOWN;
+ else if (s && !strcmp(s, "upleft")) st->mode = UPLEFT;
+ else if (s && !strcmp(s, "downleft")) st->mode = DOWNLEFT;
+ else if (s && !strcmp(s, "upright")) st->mode = UPRIGHT;
+ else if (s && !strcmp(s, "downright")) st->mode = DOWNRIGHT;
+ else if (s && !strcmp(s, "in")) st->mode = IN;
+ else if (s && !strcmp(s, "out")) st->mode = OUT;
+ else if (s && !strcmp(s, "melt")) st->mode = MELT;
+ else if (s && !strcmp(s, "stretch")) st->mode = STRETCH;
+ else if (s && !strcmp(s, "fuzz")) st->mode = FUZZ;
+ else {
+ if (s && *s && !!strcmp(s, "random"))
+ fprintf(stderr, "%s: unknown mode %s\n", progname, s);
+ st->random_p = 1;
+ st->mode = random() % (FUZZ+1);
+ }
+
+ st->delay = get_integer_resource (st->dpy, "delay", "Integer");
+ if (st->delay < 0) st->delay = 0;
- delay = get_integer_resource ("delay", "Integer");
- root_p = get_boolean_resource ("root", "Boolean");
+ st->duration = get_integer_resource (st->dpy, "duration", "Seconds");
+ if (st->duration < 1) st->duration = 1;
- if (delay < 0) delay = 0;
+ XGetWindowAttributes (st->dpy, st->window, &st->xgwa);
gcv.function = GXcopy;
gcv.subwindow_mode = IncludeInferiors;
- gc = XCreateGC (dpy, window, GCForeground |GCFunction | GCSubwindowMode,
- &gcv);
+ bg = get_pixel_resource (st->dpy, st->xgwa.colormap, "background", "Background");
+ gcv.foreground = bg;
- pixmap = grab_screen_image (dpy, window, root_p);
+ gcflags = GCForeground | GCFunction;
+ if (use_subwindow_mode_p(st->xgwa.screen, st->window)) /* see grabscreen.c */
+ gcflags |= GCSubwindowMode;
+ st->gc = XCreateGC (st->dpy, st->window, gcflags, &gcv);
- XGetWindowAttributes (dpy, window, &xgwa);
- sizex = xgwa.width;
- sizey = xgwa.height;
+ st->start_time = time ((time_t *) 0);
+ decayscreen_load_image (st);
+
+ return st;
}
/*
* perform one iteration of decay
*/
-static void
-decay1 (dpy, window)
- Display *dpy;
- Window window;
+static unsigned long
+decayscreen_draw (Display *dpy, Window window, void *closure)
{
- int left, top, width, height;
-
-#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;
+ struct state *st = (struct state *) closure;
+ int left, top, width, height, toleft, totop;
+
+#define L 101
+#define R 102
+#define U 103
+#define D 104
+ static const int no_bias[] = { L,L,L,L, R,R,R,R, U,U,U,U, D,D,D,D };
+ static const int up_bias[] = { L,L,L,L, R,R,R,R, U,U,U,U, U,U,D,D };
+ static const int down_bias[] = { L,L,L,L, R,R,R,R, U,U,D,D, D,D,D,D };
+ static const int left_bias[] = { L,L,L,L, L,L,R,R, U,U,U,U, D,D,D,D };
+ static const int right_bias[] = { L,L,R,R, R,R,R,R, U,U,U,U, D,D,D,D };
+
+ static const int upleft_bias[] = { L,L,L,L, L,R,R,R, U,U,U,U, U,D,D,D };
+ static const int downleft_bias[] = { L,L,L,L, L,R,R,R, U,U,U,D, D,D,D,D };
+ static const int upright_bias[] = { L,L,L,R, R,R,R,R, U,U,U,U, U,D,D,D };
+ static const int downright_bias[] = { L,L,L,R, R,R,R,R, U,U,U,D, D,D,D,D };
+
+ int off = 1;
+ if (st->sizex > 2560) off *= 2; /* Retina displays */
+
+ if (st->img_loader) /* still loading */
+ {
+ st->img_loader = load_image_async_simple (st->img_loader,
+ 0, 0, 0, 0, 0);
+ if (! st->img_loader) { /* just finished */
+
+ st->start_time = time ((time_t *) 0);
+ if (st->random_p)
+ st->mode = random() % (FUZZ+1);
+
+ if (st->mode == MELT || st->mode == STRETCH)
+ /* make sure screen eventually turns background color */
+ XDrawLine (st->dpy, st->window, st->gc, 0, 0, st->sizex, 0);
+
+ if (!st->saved) {
+ st->saved = XCreatePixmap (st->dpy, st->window,
+ st->sizex, st->sizey,
+ st->xgwa.depth);
+ st->saved_w = st->sizex;
+ st->saved_h = st->sizey;
+ }
+ XCopyArea (st->dpy, st->window, st->saved, st->gc, 0, 0,
+ st->sizex, st->sizey, 0, 0);
+ }
+ return st->delay;
+ }
+
+ if (!st->img_loader &&
+ st->start_time + st->duration < time ((time_t *) 0)) {
+ decayscreen_load_image (st);
}
- XSync (dpy, True);
+
+ switch (st->mode) {
+ case SHUFFLE: st->current_bias = no_bias; break;
+ case UP: st->current_bias = up_bias; break;
+ case LEFT: st->current_bias = left_bias; break;
+ case RIGHT: st->current_bias = right_bias; break;
+ case DOWN: st->current_bias = down_bias; break;
+ case UPLEFT: st->current_bias = upleft_bias; break;
+ case DOWNLEFT: st->current_bias = downleft_bias; break;
+ case UPRIGHT: st->current_bias = upright_bias; break;
+ case DOWNRIGHT: st->current_bias = downright_bias; break;
+ case IN: st->current_bias = no_bias; break;
+ case OUT: st->current_bias = no_bias; break;
+ case MELT: st->current_bias = no_bias; break;
+ case STRETCH: st->current_bias = no_bias; break;
+ case FUZZ: st->current_bias = no_bias; break;
+ default: abort();
+ }
+
+#define nrnd(x) ((x) ? random() % (x) : x)
+
+ if (st->mode == MELT || st->mode == STRETCH) {
+ left = nrnd(st->sizex/2);
+ top = nrnd(st->sizey);
+ width = nrnd( st->sizex/2 ) + st->sizex/2 - left;
+ height = nrnd(st->sizey - top);
+ toleft = left;
+ totop = top+off;
+
+ } else if (st->mode == FUZZ) { /* By Vince Levey <vincel@vincel.org>;
+ inspired by the "melt" mode of the
+ "scrhack" IrisGL program by Paul Haeberli
+ circa 1991. */
+ left = nrnd(st->sizex - 1);
+ top = nrnd(st->sizey - 1);
+ st->fuzz_toggle = !st->fuzz_toggle;
+ if (st->fuzz_toggle)
+ {
+ totop = top;
+ height = off;
+ toleft = nrnd(st->sizex - 1);
+ if (toleft > left)
+ {
+ width = toleft-left;
+ toleft = left;
+ left++;
+ }
+ else
+ {
+ width = left-toleft;
+ left = toleft;
+ toleft++;
+ }
+ }
+ else
+ {
+ toleft = left;
+ width = off;
+ totop = nrnd(st->sizey - 1);
+ if (totop > top)
+ {
+ height = totop-top;
+ totop = top;
+ top++;
+ }
+ else
+ {
+ height = top-totop;
+ top = totop;
+ totop++;
+ }
+ }
+
+ } else {
+
+ left = nrnd(st->sizex - 1);
+ top = nrnd(st->sizey);
+ width = nrnd(st->sizex - left);
+ height = nrnd(st->sizey - top);
+
+ toleft = left;
+ totop = top;
+ if (st->mode == IN || st->mode == OUT) {
+ int x = left+(width/2);
+ int y = top+(height/2);
+ int cx = st->sizex/2;
+ int cy = st->sizey/2;
+ if (st->mode == IN) {
+ if (x > cx && y > cy) st->current_bias = upleft_bias;
+ else if (x < cx && y > cy) st->current_bias = upright_bias;
+ else if (x < cx && y < cy) st->current_bias = downright_bias;
+ else /* (x > cx && y < cy)*/ st->current_bias = downleft_bias;
+ } else {
+ if (x > cx && y > cy) st->current_bias = downright_bias;
+ else if (x < cx && y > cy) st->current_bias = downleft_bias;
+ else if (x < cx && y < cy) st->current_bias = upleft_bias;
+ else /* (x > cx && y < cy)*/ st->current_bias = upright_bias;
+ }
+ }
+
+ switch (st->current_bias[random() % (sizeof(no_bias)/sizeof(*no_bias))]) {
+ case L: toleft = left-off; break;
+ case R: toleft = left+off; break;
+ case U: totop = top-off; break;
+ case D: totop = top+off; break;
+ default: abort(); break;
+ }
+ }
+
+ if (st->mode == STRETCH) {
+ XCopyArea (st->dpy, st->window, st->window, st->gc,
+ 0, st->sizey-top-off*2, st->sizex, top+off,
+ 0, st->sizey-top-off);
+ } else {
+ XCopyArea (st->dpy, st->window, st->window, st->gc,
+ left, top, width, height,
+ toleft, totop);
+ }
+
#undef nrnd
+
+ return st->delay;
+}
+
+static void
+decayscreen_reshape (Display *dpy, Window window, void *closure,
+ unsigned int w, unsigned int h)
+{
+ struct state *st = (struct state *) closure;
+ if (! st->saved) return; /* Image might not be loaded yet */
+ XClearWindow (st->dpy, st->window);
+ XCopyArea (st->dpy, st->saved, st->window, st->gc,
+ 0, 0, st->saved_w, st->saved_h,
+ ((int)w - st->saved_w) / 2,
+ ((int)h - st->saved_h) / 2);
+ st->sizex = w;
+ st->sizey = h;
+}
+
+static Bool
+decayscreen_event (Display *dpy, Window window, void *closure, XEvent *event)
+{
+ struct state *st = (struct state *) closure;
+ if (screenhack_event_helper (dpy, window, event))
+ {
+ st->start_time = 0;
+ return True;
+ }
+ return False;
+}
+
+static void
+decayscreen_free (Display *dpy, Window window, void *closure)
+{
+ struct state *st = (struct state *) closure;
+ free (st);
}
\f
-char *progclass = "DecayScreen";
-char *defaults [] = {
- "DecayScreen.mappedWhenManaged:false",
- "DecayScreen.dontClearWindow: true",
- "*delay: 10",
+static const char *decayscreen_defaults [] = {
+ ".background: Black",
+ ".foreground: Yellow",
+ "*dontClearRoot: True",
+ "*fpsSolid: True",
+
+#ifdef __sgi /* really, HAVE_READ_DISPLAY_EXTENSION */
+ "*visualID: Best",
+#endif
+
+ "*delay: 10000",
+ "*mode: random",
+ "*duration: 120",
+#ifdef HAVE_MOBILE
+ "*ignoreRotation: True",
+ "*rotateImages: True",
+#endif
0
};
-XrmOptionDescRec options [] = {
+static XrmOptionDescRec decayscreen_options [] = {
{ "-delay", ".delay", XrmoptionSepArg, 0 },
+ { "-mode", ".mode", XrmoptionSepArg, 0 },
+ { "-duration", ".duration", XrmoptionSepArg, 0 },
+ { 0, 0, 0, 0 }
};
-int options_size = (sizeof (options) / sizeof (options[0]));
-void
-screenhack (dpy, window)
- Display *dpy;
- Window window;
-{
- init_decay (dpy, window);
- while (1) {
- decay1 (dpy, window);
- if (delay) usleep (delay);
- }
-}
+XSCREENSAVER_MODULE ("DecayScreen", decayscreen)