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-rw-r--r--hacks/greynetic.c296
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diff --git a/hacks/greynetic.c b/hacks/greynetic.c
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--- /dev/null
+++ b/hacks/greynetic.c
@@ -0,0 +1,296 @@
+/* xscreensaver, Copyright (c) 1992-2008 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
+ * the above copyright notice appear in all copies and that both that
+ * copyright notice and this permission notice appear in supporting
+ * documentation. No representations are made about the suitability of this
+ * software for any purpose. It is provided "as is" without express or
+ * implied warranty.
+ */
+
+#include "screenhack.h"
+
+#ifndef HAVE_JWXYZ
+# define DO_STIPPLE
+#endif
+
+#define NBITS 12
+
+/* On some systems (notably MacOS X) these files are messed up.
+ * They're tiny, so we might as well just inline them here.
+ *
+ * # include <X11/bitmaps/stipple>
+ * # include <X11/bitmaps/cross_weave>
+ * # include <X11/bitmaps/dimple1>
+ * # include <X11/bitmaps/dimple3>
+ * # include <X11/bitmaps/flipped_gray>
+ * # include <X11/bitmaps/gray1>
+ * # include <X11/bitmaps/gray3>
+ * # include <X11/bitmaps/hlines2>
+ * # include <X11/bitmaps/light_gray>
+ * # include <X11/bitmaps/root_weave>
+ * # include <X11/bitmaps/vlines2>
+ * # include <X11/bitmaps/vlines3>
+*/
+
+#ifdef DO_STIPPLE
+#define stipple_width 16
+#define stipple_height 4
+static unsigned char stipple_bits[] = {
+ 0x55, 0x55, 0xee, 0xee, 0x55, 0x55, 0xba, 0xbb};
+
+#define cross_weave_width 16
+#define cross_weave_height 16
+static unsigned char cross_weave_bits[] = {
+ 0x55, 0x55, 0x88, 0x88, 0x55, 0x55, 0x22, 0x22, 0x55, 0x55, 0x88, 0x88,
+ 0x55, 0x55, 0x22, 0x22, 0x55, 0x55, 0x88, 0x88, 0x55, 0x55, 0x22, 0x22,
+ 0x55, 0x55, 0x88, 0x88, 0x55, 0x55, 0x22, 0x22};
+
+#define dimple1_width 16
+#define dimple1_height 16
+static unsigned char dimple1_bits[] = {
+ 0x55, 0x55, 0x00, 0x00, 0x55, 0x55, 0x00, 0x00, 0x55, 0x55, 0x00, 0x00,
+ 0x55, 0x55, 0x00, 0x00, 0x55, 0x55, 0x00, 0x00, 0x55, 0x55, 0x00, 0x00,
+ 0x55, 0x55, 0x00, 0x00, 0x55, 0x55, 0x00, 0x00};
+
+#define dimple3_width 16
+#define dimple3_height 16
+static unsigned char dimple3_bits[] = {
+ 0x11, 0x11, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x11, 0x11, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x11, 0x11, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x11, 0x11, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
+
+#define flipped_gray_width 4
+#define flipped_gray_height 2
+static char flipped_gray_bits[] = { 0x07, 0x0d};
+#define gray1_width 2
+#define gray1_height 2
+static char gray1_bits[] = { 0x01, 0x02};
+#define gray3_width 4
+#define gray3_height 4
+static char gray3_bits[] = { 0x01, 0x00, 0x04, 0x00};
+#define hlines2_width 1
+#define hlines2_height 2
+static char hlines2_bits[] = { 0x01, 0x00};
+#define light_gray_width 4
+#define light_gray_height 2
+static char light_gray_bits[] = { 0x08, 0x02};
+#define root_weave_width 4
+#define root_weave_height 4
+static char root_weave_bits[] = { 0x07, 0x0d, 0x0b, 0x0e};
+#define vlines2_width 2
+#define vlines2_height 1
+static char vlines2_bits[] = { 0x01};
+#define vlines3_width 3
+#define vlines3_height 1
+static char vlines3_bits[] = { 0x02};
+
+#endif /* DO_STIPPLE */
+
+struct state {
+ Display *dpy;
+ Window window;
+
+ Pixmap pixmaps [NBITS];
+
+ GC gc;
+ int delay;
+ unsigned long fg, bg, pixels [512];
+ int npixels;
+ int xlim, ylim;
+ Bool grey_p;
+ Colormap cmap;
+};
+
+
+static void *
+greynetic_init (Display *dpy, Window window)
+{
+ struct state *st = (struct state *) calloc (1, sizeof(*st));
+# ifdef DO_STIPPLE
+ int i;
+# endif /* DO_STIPPLE */
+ XGCValues gcv;
+ XWindowAttributes xgwa;
+ st->dpy = dpy;
+ st->window = window;
+
+ XGetWindowAttributes (st->dpy, st->window, &xgwa);
+ st->xlim = xgwa.width;
+ st->ylim = xgwa.height;
+ st->cmap = xgwa.colormap;
+ st->npixels = 0;
+ st->grey_p = get_boolean_resource(st->dpy, "grey", "Boolean");
+ gcv.foreground= st->fg= get_pixel_resource(st->dpy, st->cmap, "foreground","Foreground");
+ gcv.background= st->bg= get_pixel_resource(st->dpy, st->cmap, "background","Background");
+
+ st->delay = get_integer_resource (st->dpy, "delay", "Integer");
+ if (st->delay < 0) st->delay = 0;
+
+# ifndef DO_STIPPLE
+ st->gc = XCreateGC (st->dpy, st->window, GCForeground, &gcv);
+# ifdef HAVE_JWXYZ /* allow non-opaque alpha components in pixel values */
+ jwxyz_XSetAlphaAllowed (st->dpy, st->gc, True);
+# endif /* HAVE_JWXYZ */
+# else /* DO_STIPPLE */
+ gcv.fill_style= FillOpaqueStippled;
+ st->gc = XCreateGC (st->dpy, st->window, GCForeground|GCBackground|GCFillStyle, &gcv);
+
+ i = 0;
+# define BITS(n,w,h) \
+ st->pixmaps [i++] = \
+ XCreatePixmapFromBitmapData (st->dpy, st->window, (char *) n, w, h, 1, 0, 1)
+
+ BITS (stipple_bits, stipple_width, stipple_height);
+ BITS (cross_weave_bits, cross_weave_width, cross_weave_height);
+ BITS (dimple1_bits, dimple1_width, dimple1_height);
+ BITS (dimple3_bits, dimple3_width, dimple3_height);
+ BITS (flipped_gray_bits, flipped_gray_width, flipped_gray_height);
+ BITS (gray1_bits, gray1_width, gray1_height);
+ BITS (gray3_bits, gray3_width, gray3_height);
+ BITS (hlines2_bits, hlines2_width, hlines2_height);
+ BITS (light_gray_bits, light_gray_width, light_gray_height);
+ BITS (root_weave_bits, root_weave_width, root_weave_height);
+ BITS (vlines2_bits, vlines2_width, vlines2_height);
+ BITS (vlines3_bits, vlines3_width, vlines3_height);
+# endif /* DO_STIPPLE */
+ return st;
+}
+
+static unsigned long
+greynetic_draw (Display *dpy, Window window, void *closure)
+{
+ struct state *st = (struct state *) closure;
+ int x, y, w=0, h=0, i;
+ XGCValues gcv;
+
+ for (i = 0; i < 10; i++) /* minimize area, but don't try too hard */
+ {
+ w = 50 + random () % (st->xlim - 50);
+ h = 50 + random () % (st->ylim - 50);
+ if (w + h < st->xlim && w + h < st->ylim)
+ break;
+ }
+ x = random () % (st->xlim - w);
+ y = random () % (st->ylim - h);
+# ifdef DO_STIPPLE
+ gcv.stipple = st->pixmaps [random () % NBITS];
+# endif /* !DO_STIPPLE */
+ if (mono_p)
+ {
+ MONO:
+ if (random () & 1)
+ gcv.foreground = st->fg, gcv.background = st->bg;
+ else
+ gcv.foreground = st->bg, gcv.background = st->fg;
+ }
+ else
+ {
+ XColor fgc, bgc;
+ if (st->npixels == sizeof (st->pixels) / sizeof (unsigned long))
+ goto REUSE;
+ fgc.flags = bgc.flags = DoRed|DoGreen|DoBlue;
+ fgc.red = random ();
+ fgc.green = random ();
+ fgc.blue = random ();
+# ifdef DO_STIPPLE
+ bgc.red = random ();
+ bgc.green = random ();
+ bgc.blue = random ();
+# endif /* DO_STIPPLE */
+
+ if (st->grey_p)
+ {
+ fgc.green = fgc.blue = fgc.red;
+ bgc.green = bgc.blue = bgc.red;
+ }
+
+ if (! XAllocColor (st->dpy, st->cmap, &fgc))
+ goto REUSE;
+ st->pixels [st->npixels++] = fgc.pixel;
+ gcv.foreground = fgc.pixel;
+# ifdef DO_STIPPLE
+ if (! XAllocColor (st->dpy, st->cmap, &bgc))
+ goto REUSE;
+ st->pixels [st->npixels++] = bgc.pixel;
+ gcv.background = bgc.pixel;
+# endif /* DO_STIPPLE */
+ goto DONE;
+ REUSE:
+ if (st->npixels <= 0)
+ {
+ mono_p = 1;
+ goto MONO;
+ }
+ gcv.foreground = st->pixels [random () % st->npixels];
+# ifdef DO_STIPPLE
+ gcv.background = st->pixels [random () % st->npixels];
+# endif /* DO_STIPPLE */
+ DONE:
+ ;
+
+# ifdef HAVE_JWXYZ
+ {
+ /* give a non-opaque alpha to the color */
+ unsigned long pixel = gcv.foreground;
+ unsigned long amask = BlackPixel (dpy,0);
+ unsigned long a = (random() & amask);
+ pixel = (pixel & (~amask)) | a;
+ gcv.foreground = pixel;
+ }
+# endif /* !HAVE_JWXYZ */
+ }
+# ifndef DO_STIPPLE
+ XChangeGC (st->dpy, st->gc, GCForeground, &gcv);
+# else /* DO_STIPPLE */
+ XChangeGC (st->dpy, st->gc, GCStipple|GCForeground|GCBackground, &gcv);
+# endif /* DO_STIPPLE */
+ XFillRectangle (st->dpy, st->window, st->gc, x, y, w, h);
+ return st->delay;
+}
+
+
+static const char *greynetic_defaults [] = {
+ ".background: black",
+ ".foreground: white",
+ "*fpsSolid: true",
+ "*delay: 10000",
+ "*grey: false",
+#ifdef HAVE_MOBILE
+ "*ignoreRotation: True",
+#endif
+ 0
+};
+
+static XrmOptionDescRec greynetic_options [] = {
+ { "-delay", ".delay", XrmoptionSepArg, 0 },
+ { "-grey", ".grey", XrmoptionNoArg, "True" },
+ { 0, 0, 0, 0 }
+};
+
+static void
+greynetic_reshape (Display *dpy, Window window, void *closure,
+ unsigned int w, unsigned int h)
+{
+ struct state *st = (struct state *) closure;
+ st->xlim = w;
+ st->ylim = h;
+}
+
+static Bool
+greynetic_event (Display *dpy, Window window, void *closure, XEvent *event)
+{
+ return False;
+}
+
+static void
+greynetic_free (Display *dpy, Window window, void *closure)
+{
+ struct state *st = (struct state *) closure;
+ XFreeGC (st->dpy, st->gc);
+ free (st);
+}
+
+XSCREENSAVER_MODULE ("Greynetic", greynetic)
+
generated by cgit v1.2.3-55-g7522 (git 2.39.0) at 2024-05-18 05:03:09 +0200