Original 5.40

1 files changed, 339 insertions, 0 deletions

diff --git a/hacks/deco.c b/hacks/deco.c
new file mode 100644
index 0000000..876badc
--- /dev/null
+++ b/hacks/deco.c
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+/* xscreensaver, Copyright (c) 1997-2013 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.
+ *
+ * Concept snarfed from Michael D. Bayne in
+ * http://www.go2net.com/internet/deep/1997/04/16/body.html
+ *
+ * Changes by Lars Huttar, http://www.huttar.net:
+ * - allow use of golden ratio for dividing rectangles instead of 1/2.
+ * - allow smooth colors instead of random
+ * - added line thickness setting
+ * - added "Mondrian" mode
+ * Other ideas:
+ * - allow recomputing the colormap on each new frame (especially useful
+ *   when ncolors is low)
+ */
+
+#include "screenhack.h"
+#include <stdio.h>
+
+struct state {
+  XColor colors[255];
+  int ncolors;
+  int max_depth;
+  int min_height;
+  int min_width;
+  int line_width;
+  int old_line_width;
+  Bool goldenRatio;
+  Bool mondrian;
+  Bool smoothColors;
+
+  int delay;
+  XWindowAttributes xgwa;
+  GC fgc, bgc;
+  int current_color;
+};
+
+/* Golden Ratio
+ *   Suppose you're dividing a rectangle of length A+B
+ *   into two parts, of length A and B respectively. You want the ratio of
+ *   A to B to be the same as the ratio of the whole (A+B) to A. The golden
+ *   ratio (phi) is that ratio. Supposed to be visually pleasing. */
+#define PHI 1.61803
+#define PHI1 (1.0/PHI)
+#define PHI2 (1.0 - PHI1)
+
+/* copied from make_random_colormap in colors.c */
+static void
+make_mondrian_colormap (Screen *screen, Visual *visual, Colormap cmap,
+		      XColor *colors, int *ncolorsP,
+		      Bool allocate_p,
+		      Bool *writable_pP,
+		      Bool verbose_p)
+{
+  Display *dpy = DisplayOfScreen (screen);
+  Bool wanted_writable = (allocate_p && writable_pP && *writable_pP);
+  int ncolors = 8;
+  int i;
+
+  if (*ncolorsP <= 0) return;
+
+  /* If this visual doesn't support writable cells, don't bother trying. */
+  if (wanted_writable && !has_writable_cells(screen, visual))
+    *writable_pP = False;
+
+  for (i = 0; i < ncolors; i++)
+  {
+      colors[i].flags = DoRed|DoGreen|DoBlue;
+      colors[i].red = 0;
+      colors[i].green = 0;
+      colors[i].blue = 0;
+
+      switch(i) {
+	  case 0: case 1: case 2: case 3: case 7: /* white */
+	      colors[i].red = 0xE800;
+	      colors[i].green = 0xE800;
+	      colors[i].blue  = 0xE800;
+	      break;
+	  case 4:
+	      colors[i].red = 0xCFFF; break; /* red */
+	  case 5:
+	      colors[i].red = 0x2000;
+	      colors[i].blue = 0xCFFF; break; /* blue */
+	  case 6:
+	      colors[i].red = 0xDFFF; /* yellow */
+	      colors[i].green = 0xCFFF; break;
+      }
+  }
+
+  if (!allocate_p)
+    return;
+
+ RETRY_NON_WRITABLE:
+  if (writable_pP && *writable_pP)
+    {
+      unsigned long *pixels = (unsigned long *)
+	malloc(sizeof(*pixels) * (ncolors + 1));
+
+      allocate_writable_colors (screen, cmap, pixels, &ncolors);
+      if (ncolors > 0)
+	for (i = 0; i < ncolors; i++)
+	  colors[i].pixel = pixels[i];
+      free (pixels);
+      if (ncolors > 0)
+	XStoreColors (dpy, cmap, colors, ncolors);
+    }
+  else
+    {
+      for (i = 0; i < ncolors; i++)
+	{
+	  XColor color;
+	  color = colors[i];
+	  if (!XAllocColor (dpy, cmap, &color))
+	    break;
+	  colors[i].pixel = color.pixel;
+	}
+      ncolors = i;
+    }
+
+  /* If we tried for writable cells and got none, try for non-writable. */
+  if (allocate_p && ncolors == 0 && writable_pP && *writable_pP)
+    {
+      ncolors = *ncolorsP;
+      *writable_pP = False;
+      goto RETRY_NON_WRITABLE;
+    }
+
+#if 0
+  /* I don't think we need to bother copying or linking to the complain
+     function. */
+  if (verbose_p)
+    complain(*ncolorsP, ncolors, wanted_writable,
+	     wanted_writable && *writable_pP);
+#endif
+
+  *ncolorsP = ncolors;
+}
+
+static void
+mondrian_set_sizes (struct state *st, int w, int h)
+{
+    if (w > h) {
+	st->line_width = w/50;
+	st->min_height = st->min_width = w/8;
+    } else {
+	st->line_width = h/50;
+	st->min_height = st->min_width = h/8;
+    }
+}
+ 
+static void
+deco (Display *dpy, Window window, struct state *st,
+      int x, int y, int w, int h, int depth)
+{
+  if (((random() % st->max_depth) < depth) || (w < st->min_width) || (h < st->min_height))
+    {
+      if (!mono_p)
+	{
+	  if (++st->current_color >= st->ncolors)
+	    st->current_color = 0;
+	  XSetForeground(dpy, st->bgc, st->colors[st->current_color].pixel);
+	}
+      XFillRectangle (dpy, window, st->bgc, x, y, w, h);
+      XDrawRectangle (dpy, window, st->fgc, x, y, w, h);
+    }
+  else
+    {
+      if ((st->goldenRatio || st->mondrian) ? (w > h) : (random() & 1))
+        { /* Divide the rectangle side-by-side */
+          int wnew = (st->goldenRatio ? (w * (random() & 1 ? PHI1 : PHI2)) : w/2);
+	  deco (dpy, window, st, x, y, wnew, h, depth+1);
+	  deco (dpy, window, st, x+wnew, y, w-wnew, h, depth+1);
+	}
+      else
+        { /* Divide the rectangle top-to-bottom */
+          int hnew = (st->goldenRatio ? (h * (random() & 1 ? PHI1 : PHI2)) : h/2);
+	  deco (dpy, window, st, x, y, w, hnew, depth+1);
+	  deco (dpy, window, st, x, y+hnew, w, h-hnew, depth+1);
+	}
+    }
+}
+
+static void *
+deco_init (Display *dpy, Window window)
+{
+  struct state *st = (struct state *) calloc (1, sizeof(*st));
+  XGCValues gcv;
+
+  st->delay = get_integer_resource (dpy, "delay", "Integer");
+
+  st->smoothColors = get_boolean_resource(dpy, "smoothColors", "Boolean");
+  st->old_line_width = 1;
+
+  st->goldenRatio = get_boolean_resource (dpy, "goldenRatio", "Boolean");
+
+  st->max_depth = get_integer_resource (dpy, "maxDepth", "Integer");
+  if (st->max_depth < 1) st->max_depth = 1;
+  else if (st->max_depth > 1000) st->max_depth = 1000;
+
+  st->min_width = get_integer_resource (dpy, "minWidth", "Integer");
+  if (st->min_width < 2) st->min_width = 2;
+  st->min_height = get_integer_resource (dpy, "minHeight", "Integer");
+  if (st->min_height < 2) st->min_height = 2;
+
+  st->line_width = get_integer_resource (dpy, "lineWidth", "Integer");
+
+  XGetWindowAttributes (dpy, window, &st->xgwa);
+
+  st->ncolors = get_integer_resource (dpy, "ncolors", "Integer");
+
+  gcv.foreground = get_pixel_resource(dpy, st->xgwa.colormap,
+                                      "foreground", "Foreground");
+  st->fgc = XCreateGC (dpy, window, GCForeground, &gcv);
+
+  gcv.foreground = get_pixel_resource(dpy, st->xgwa.colormap,
+                                      "background", "Background");
+  st->bgc = XCreateGC (dpy, window, GCForeground, &gcv);
+
+  if (st->ncolors <= 2)
+    mono_p = True;
+
+  if (!mono_p)
+    {
+      GC tmp = st->fgc;
+      st->fgc = st->bgc;
+      st->bgc = tmp;
+    }
+
+  st->mondrian = get_boolean_resource(dpy, "mondrian", "Boolean");
+  if (st->mondrian) {
+      /* Mondrian, if true, overrides several other options. */
+      mondrian_set_sizes(st, st->xgwa.width, st->xgwa.height);
+
+      /** set up red-yellow-blue-black-white colormap and fgc **/
+      make_mondrian_colormap(st->xgwa.screen, st->xgwa.visual,
+                             st->xgwa.colormap,
+			     st->colors, &st->ncolors, True, 0, True);
+
+      /** put white in several cells **/
+      /** set min-height and min-width to about 10% of total w/h **/
+  }
+  else if (st->smoothColors)
+      make_smooth_colormap (st->xgwa.screen, st->xgwa.visual,
+                            st->xgwa.colormap,
+			    st->colors, &st->ncolors, True, 0, True);
+  else
+      make_random_colormap (st->xgwa.screen, st->xgwa.visual,
+                            st->xgwa.colormap,
+			    st->colors, &st->ncolors, False, True, 0, True);
+
+  gcv.line_width = st->old_line_width = st->line_width;
+  XChangeGC(dpy, st->fgc, GCLineWidth, &gcv);
+
+  return st;
+}
+
+static unsigned long
+deco_draw (Display *dpy, Window window, void *closure)
+{
+  struct state *st = (struct state *) closure;
+  XFillRectangle (dpy, window, st->bgc, 0, 0, st->xgwa.width, st->xgwa.height);
+  if (st->mondrian) {
+      mondrian_set_sizes(st, st->xgwa.width, st->xgwa.height);
+      if (st->line_width != st->old_line_width) {
+	  XSetLineAttributes(dpy, st->fgc, st->line_width,
+			     LineSolid, CapButt, JoinBevel);
+	  st->old_line_width = st->line_width;
+      }
+  }
+  deco (dpy, window, st, 0, 0, st->xgwa.width, st->xgwa.height, 0);
+  return 1000000 * st->delay;
+}
+
+static void
+deco_reshape (Display *dpy, Window window, void *closure, 
+                 unsigned int w, unsigned int h)
+{
+  struct state *st = (struct state *) closure;
+  st->xgwa.width = w;
+  st->xgwa.height = h;
+}
+
+static Bool
+deco_event (Display *dpy, Window window, void *closure, XEvent *event)
+{
+  return False;
+}
+
+static void
+deco_free (Display *dpy, Window window, void *closure)
+{
+  struct state *st = (struct state *) closure;
+  free (st);
+}
+
+
+static const char *deco_defaults [] = {
+  ".background:		black",
+  ".foreground:		white",
+  ".lowrez:		true",
+  "*maxDepth:		12",
+  "*minWidth:		20",
+  "*minHeight:		20",
+  "*lineWidth:          1",
+  "*delay:		5",
+  "*ncolors:		64",
+  "*goldenRatio:        False",
+  "*smoothColors:       False",
+  "*mondrian:           False",
+#ifdef HAVE_MOBILE
+  "*ignoreRotation:     True",
+#endif
+  0
+};
+
+static XrmOptionDescRec deco_options [] = {
+  { "-max-depth",	".maxDepth",	XrmoptionSepArg, 0 },
+  { "-min-width",	".minWidth",	XrmoptionSepArg, 0 },
+  { "-min-height",	".minHeight",	XrmoptionSepArg, 0 },
+  { "-line-width",	".lineWidth",	XrmoptionSepArg, 0 },
+  { "-delay",		".delay",	XrmoptionSepArg, 0 },
+  { "-ncolors",		".ncolors",	XrmoptionSepArg, 0 },
+  { "-golden-ratio",    ".goldenRatio", XrmoptionNoArg, "True" },
+  { "-no-golden-ratio", ".goldenRatio", XrmoptionNoArg, "False" },
+  { "-smooth-colors",   ".smoothColors",XrmoptionNoArg, "True" },
+  { "-no-smooth-colors",".smoothColors",XrmoptionNoArg, "False" },
+  { "-mondrian",        ".mondrian",    XrmoptionNoArg, "True" },
+  { "-no-mondrian",     ".mondrian",    XrmoptionNoArg, "False" },
+  { 0, 0, 0, 0 }
+};
+
+XSCREENSAVER_MODULE ("Deco", deco)