Original 5.40

1 files changed, 624 insertions, 0 deletions

diff --git a/hacks/qix.c b/hacks/qix.c
new file mode 100644
index 0000000..1498af7
--- /dev/null
+++ b/hacks/qix.c
@@ -0,0 +1,624 @@
+/* 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"
+#include "alpha.h"
+#include <stdio.h>
+
+#define MAXPOLY	16
+#define SCALE	6
+
+struct qpoint {
+  int x, y;
+  int dx, dy;
+};
+
+struct qline {
+  struct qpoint *p;
+  XColor color;
+  Bool dead;
+};
+
+struct qix {
+  int id;
+  int fp;
+  int nlines;
+  int npoly;
+  struct qline *lines;
+};
+
+struct state {
+  Display *dpy;
+  Window window;
+
+  GC draw_gc, erase_gc;
+  unsigned int default_fg_pixel;
+  long maxx, maxy, max_spread, max_size;
+  int color_shift;
+  Bool random_p, solid_p, xor_p, transparent_p, gravity_p;
+  int delay;
+  int count;
+  Colormap cmap;
+  int npoly;
+  Bool additive_p;
+  Bool cmap_p;
+
+  GC *gcs[2];
+
+  int gtick;
+
+  struct qix **qixes;
+};
+
+
+static void
+get_geom (struct state *st)
+{
+  XWindowAttributes xgwa;
+  XGetWindowAttributes (st->dpy, st->window, &xgwa);
+  st->maxx = ((long)(xgwa.width+1)<<SCALE)  - 1;
+  st->maxy = ((long)(xgwa.height+1)<<SCALE) - 1;
+}
+
+static struct qix *
+init_one_qix (struct state *st, int nlines)
+{
+  int i, j;
+  struct qix *qix = (struct qix *) calloc (1, sizeof (struct qix));
+  qix->nlines = nlines;
+  qix->lines = (struct qline *) calloc (qix->nlines, sizeof (struct qline));
+  qix->npoly = st->npoly;
+  for (i = 0; i < qix->nlines; i++)
+    qix->lines[i].p = (struct qpoint *)
+      calloc(qix->npoly, sizeof(struct qpoint));
+
+# ifndef HAVE_JWXYZ
+  if (!mono_p && !st->transparent_p)
+# endif
+    {
+      hsv_to_rgb (random () % 360, frand (1.0), frand (0.5) + 0.5,
+		  &qix->lines[0].color.red, &qix->lines[0].color.green,
+		  &qix->lines[0].color.blue);
+      if (!XAllocColor (st->dpy, st->cmap, &qix->lines[0].color))
+	{
+	  qix->lines[0].color.pixel = st->default_fg_pixel;
+	  XQueryColor (st->dpy, st->cmap, &qix->lines[0].color);
+	  if (!XAllocColor (st->dpy, st->cmap, &qix->lines[0].color))
+	    abort ();
+	}
+    }
+
+  if (st->max_size == 0)
+    {
+      for (i = 0; i < qix->npoly; i++)
+	{
+	  qix->lines[0].p[i].x = random () % st->maxx;
+	  qix->lines[0].p[i].y = random () % st->maxy;
+	}
+    }
+  else
+    {
+      /*assert(qix->npoly == 2);*/
+      qix->lines[0].p[0].x = random () % st->maxx;
+      qix->lines[0].p[0].y = random () % st->maxy;
+      qix->lines[0].p[1].x = qix->lines[0].p[0].x + (random () % (st->max_size/2));
+      qix->lines[0].p[1].y = qix->lines[0].p[0].y + (random () % (st->max_size/2));
+      if (qix->lines[0].p[1].x > st->maxx) qix->lines[0].p[1].x = st->maxx;
+      if (qix->lines[0].p[1].y > st->maxy) qix->lines[0].p[1].y = st->maxy;
+    }
+
+  for (i = 0; i < qix->npoly; i++)
+    {
+      qix->lines[0].p[i].dx = (random () % (st->max_spread + 1)) - (st->max_spread /2);
+      qix->lines[0].p[i].dy = (random () % (st->max_spread + 1)) - (st->max_spread /2);
+    }
+  qix->lines[0].dead = True;
+
+  for (i = 1; i < qix->nlines; i++)
+    {
+      for(j=0; j<qix->npoly; j++)
+	qix->lines[i].p[j] = qix->lines[0].p[j];
+      qix->lines[i].color = qix->lines[0].color;
+      qix->lines[i].dead = qix->lines[0].dead;
+  
+# ifndef HAVE_JWXYZ
+      if (!mono_p && !st->transparent_p)
+# endif
+	if (!XAllocColor (st->dpy, st->cmap, &qix->lines[i].color))
+	  abort ();
+    }
+  return qix;
+}
+
+
+
+
+static void *
+qix_init (Display *dpy, Window window)
+{
+  struct state *st = (struct state *) calloc (1, sizeof(*st));
+  int nlines;
+  XGCValues gcv;
+  XWindowAttributes xgwa;
+  st->dpy = dpy;
+  st->window = window;
+  XGetWindowAttributes (st->dpy, st->window, &xgwa);
+  st->cmap = xgwa.colormap;
+  st->count = get_integer_resource (st->dpy, "count", "Integer");
+  if (st->count <= 0) st->count = 1;
+  nlines = get_integer_resource (st->dpy, "segments", "Integer");
+  if (nlines <= 0) nlines = 20;
+  st->npoly = get_integer_resource(st->dpy, "poly", "Integer");
+  if (st->npoly <= 2) st->npoly = 2;
+  if (st->npoly > MAXPOLY) st->npoly = MAXPOLY;
+  get_geom (st);
+  st->max_spread = get_integer_resource (st->dpy, "spread", "Integer");
+  if (st->max_spread <= 0) st->max_spread = 10;
+  st->max_spread <<= SCALE;
+  st->max_size = get_integer_resource (st->dpy, "size", "Integer");
+  if (st->max_size < 0) st->max_size = 0;
+  st->max_size <<= SCALE;
+  st->random_p = get_boolean_resource (st->dpy, "random", "Boolean");
+  st->solid_p = get_boolean_resource (st->dpy, "solid", "Boolean");
+  st->xor_p = get_boolean_resource (st->dpy, "xor", "Boolean");
+  st->transparent_p = get_boolean_resource (st->dpy, "transparent", "Boolean");
+  st->gravity_p = get_boolean_resource(st->dpy, "gravity", "Boolean");
+  st->delay = get_integer_resource (st->dpy, "delay", "Integer");
+  st->color_shift = get_integer_resource (st->dpy, "colorShift", "Integer");
+  if (st->color_shift < 0 || st->color_shift >= 360) st->color_shift = 5;
+  if (st->delay < 0) st->delay = 0;
+
+  /* Clear up ambiguities regarding npoly */
+  if (st->solid_p) 
+    {
+      if (st->npoly != 2)
+	fprintf(stderr, "%s: Can't have -solid and -poly; using -poly 2\n",
+		progname);
+      st->npoly = 2;
+    }      
+  if (st->npoly > 2)
+    {
+      if (st->max_size)
+	fprintf(stderr, "%s: Can't have -poly and -size; using -size 0\n",
+		progname);
+      st->max_size = 0;
+    }
+
+  if (st->count == 1 && st->transparent_p)
+    st->transparent_p = False; /* it's a no-op */
+
+  if (st->transparent_p && CellsOfScreen (DefaultScreenOfDisplay (st->dpy)) <= 2)
+    {
+      fprintf (stderr, "%s: -transparent only works on color displays.\n",
+	       progname);
+      st->transparent_p = False;
+    }
+
+  if (st->xor_p && !st->transparent_p)
+    mono_p = True;
+
+  st->gcs[0] = st->gcs[1] = 0;
+  gcv.foreground = st->default_fg_pixel =
+    get_pixel_resource (st->dpy, st->cmap, "foreground", "Foreground");
+
+  st->additive_p = get_boolean_resource (st->dpy, "additive", "Boolean");
+  st->cmap_p = has_writable_cells (xgwa.screen, xgwa.visual);
+
+# ifndef HAVE_JWXYZ
+  if (st->transparent_p)
+    {
+      unsigned long *plane_masks = 0;
+      unsigned long base_pixel;
+      int nplanes = st->count;
+      int i;
+
+      allocate_alpha_colors (xgwa.screen, xgwa.visual, st->cmap,
+                             &nplanes, st->additive_p, &plane_masks,
+			     &base_pixel);
+
+      if (nplanes <= 1)
+	{
+	  fprintf (stderr,
+         "%s: couldn't allocate any color planes; turning -transparent off.\n",
+		   progname);
+	  st->transparent_p = False;
+	  if (st->xor_p)
+	    goto NON_TRANSPARENT_XOR;
+	  else
+	    goto NON_TRANSPARENT;
+	}
+      else if (nplanes != st->count)
+	{
+	  fprintf (stderr,
+		   "%s: only allocated %d color planes (instead of %d).\n",
+		   progname, nplanes, st->count);
+	  st->count = nplanes;
+	}
+
+      st->gcs[0] = (GC *) malloc (st->count * sizeof (GC));
+      st->gcs[1] = (st->xor_p
+                    ? st->gcs[0]
+                    : (GC *) malloc (st->count * sizeof (GC)));
+
+      for (i = 0; i < st->count; i++)
+	{
+	  gcv.plane_mask = plane_masks [i];
+	  gcv.foreground = ~0;
+
+/*  argh, I'm not sure how to make "-subtractive" work in truecolor...
+          if (!cmap_p && !additive_p)
+            gcv.function = GXclear;
+ */
+
+	  if (st->xor_p)
+	    {
+	      gcv.function = GXxor;
+	      st->gcs [0][i] = XCreateGC (st->dpy, st->window,
+                                          GCForeground|GCFunction|GCPlaneMask,
+                                          &gcv);
+	    }
+	  else
+	    {
+	      st->gcs [0][i] = XCreateGC (st->dpy, st->window, 
+                                          GCForeground|GCPlaneMask,
+                                          &gcv);
+	      gcv.foreground = 0;
+	      st->gcs [1][i] = XCreateGC (st->dpy, st->window, 
+                                          GCForeground|GCPlaneMask,
+                                          &gcv);
+# ifdef HAVE_JWXYZ
+           /* jwxyz_XSetAntiAliasing (st->dpy, st->gcs [0][i], False);
+              jwxyz_XSetAntiAliasing (st->dpy, st->gcs [1][i], False); */
+              if (st->transparent_p)
+                {
+                  jwxyz_XSetAlphaAllowed (dpy, st->gcs [0][i], True);
+                  jwxyz_XSetAlphaAllowed (dpy, st->gcs [1][i], True);
+                }
+# endif /* HAVE_JWXYZ */
+	    }
+	}
+
+      if (plane_masks)
+        free (plane_masks);
+
+      XSetWindowBackground (st->dpy, st->window, base_pixel);
+      XClearWindow (st->dpy, st->window);
+    }
+  else
+#endif /* !HAVE_JWXYZ */
+  if (st->xor_p)
+    {
+#ifndef HAVE_JWXYZ
+    NON_TRANSPARENT_XOR:
+#endif
+      gcv.function = GXxor;
+      gcv.foreground =
+	(st->default_fg_pixel /* ^ get_pixel_resource (st->dpy, st->cmap,
+                                                "background", "Background")*/);
+      st->draw_gc = st->erase_gc = XCreateGC(st->dpy,st->window,GCForeground|GCFunction,&gcv);
+    }
+  else
+    {
+#ifndef HAVE_JWXYZ
+    NON_TRANSPARENT:
+#endif
+      st->draw_gc = XCreateGC (st->dpy, st->window, GCForeground, &gcv);
+      gcv.foreground = get_pixel_resource (st->dpy, st->cmap,
+                                           "background", "Background");
+      st->erase_gc = XCreateGC (st->dpy, st->window, GCForeground, &gcv);
+    }
+
+#ifdef HAVE_JWXYZ
+  if (st->transparent_p)
+    jwxyz_XSetAlphaAllowed (dpy, st->draw_gc, True);
+#endif
+
+  st->qixes = (struct qix **) malloc ((st->count + 1) * sizeof (struct qix *));
+  st->qixes [st->count] = 0;
+  while (st->count--)
+    {
+      st->qixes [st->count] = init_one_qix (st, nlines);
+      st->qixes [st->count]->id = st->count;
+    }
+
+# ifdef HAVE_JWXYZ
+  /* line-mode leaves turds without this. */
+  jwxyz_XSetAntiAliasing (st->dpy, st->erase_gc, False);
+  jwxyz_XSetAntiAliasing (st->dpy, st->draw_gc,  False);
+# endif
+
+  return st;
+}
+
+static void
+free_qline (struct state *st,
+	    struct qline *qline,
+	    struct qline *prev,
+	    struct qix *qix)
+{
+  int i;
+  if (qline->dead || !prev)
+    ;
+  else if (st->solid_p)
+    {
+      XPoint points [4];
+      /*assert(qix->npoly == 2);*/
+      points [0].x = qline->p[0].x >> SCALE; 
+      points [0].y = qline->p[0].y >> SCALE;
+      points [1].x = qline->p[1].x >> SCALE;
+      points [1].y = qline->p[1].y >> SCALE;
+      points [2].x = prev->p[1].x >> SCALE;
+      points [2].y = prev->p[1].y >> SCALE;
+      points [3].x = prev->p[0].x >> SCALE;
+      points [3].y = prev->p[0].y >> SCALE;
+      XFillPolygon (st->dpy, st->window,
+                    (st->transparent_p && st->gcs[1]
+                     ? st->gcs[1][qix->id]
+                     : st->erase_gc),
+		    points, 4, Complex, CoordModeOrigin);
+    }
+  else
+    {
+      /*  XDrawLine (dpy, window, (transparent_p ? gcs[1][qix->id] : erase_gc),
+	             qline->p1.x, qline->p1.y, qline->p2.x, qline->p2.y);*/
+      XPoint points[MAXPOLY+1];
+      for(i = 0; i < qix->npoly; i++)
+	{
+	  points[i].x = qline->p[i].x >> SCALE;
+	  points[i].y = qline->p[i].y >> SCALE;
+	}
+      points[qix->npoly] = points[0];
+      XDrawLines(st->dpy, st->window,
+                 (st->transparent_p && st->gcs[1] 
+                  ? st->gcs[1][qix->id]
+                  : st->erase_gc),
+		 points, qix->npoly+1, CoordModeOrigin);
+    }
+
+  if (!mono_p && !st->transparent_p)
+    XFreeColors (st->dpy, st->cmap, &qline->color.pixel, 1, 0);
+
+  qline->dead = True;
+}
+
+static void
+add_qline (struct state *st,
+	   struct qline *qline,
+	   struct qline *prev_qline,
+	   struct qix *qix)
+{
+  int i;
+
+  for(i=0; i<qix->npoly; i++)
+    qline->p[i] = prev_qline->p[i];
+  qline->color = prev_qline->color;
+  qline->dead = prev_qline->dead;
+
+#define wiggle(point,delta,max)						\
+  if (st->random_p) delta += (random () % (1 << (SCALE+1))) - (1 << SCALE);	\
+  if (delta > st->max_spread) delta = st->max_spread;				\
+  else if (delta < -st->max_spread) delta = -st->max_spread;			\
+  point += delta;							\
+  if (point < 0) point = 0, delta = -delta, point += delta<<1;		\
+  else if (point > max) point = max, delta = -delta, point += delta<<1;
+
+  if (st->gravity_p)
+    for(i=0; i<qix->npoly; i++)
+      qline->p[i].dy += 3;
+
+  for (i = 0; i < qix->npoly; i++)
+    {
+      wiggle (qline->p[i].x, qline->p[i].dx, st->maxx);
+      wiggle (qline->p[i].y, qline->p[i].dy, st->maxy);
+    }
+
+  if (st->max_size)
+    {
+      /*assert(qix->npoly == 2);*/
+      if (qline->p[0].x - qline->p[1].x > st->max_size)
+	qline->p[0].x = qline->p[1].x + st->max_size
+	  - (st->random_p ? random() % st->max_spread : 0);
+      else if (qline->p[1].x - qline->p[0].x > st->max_size)
+	qline->p[1].x = qline->p[0].x + st->max_size
+	  - (st->random_p ? random() % st->max_spread : 0);
+      if (qline->p[0].y - qline->p[1].y > st->max_size)
+	qline->p[0].y = qline->p[1].y + st->max_size
+	  - (st->random_p ? random() % st->max_spread : 0);
+      else if (qline->p[1].y - qline->p[0].y > st->max_size)
+	qline->p[1].y = qline->p[0].y + st->max_size
+	  - (st->random_p ? random() % st->max_spread : 0);
+    }
+
+#ifndef HAVE_JWXYZ
+  if (!mono_p && !st->transparent_p)
+#endif
+    {
+      XColor desired;
+
+      int h;
+      double s, v;
+      rgb_to_hsv (qline->color.red, qline->color.green, qline->color.blue,
+		  &h, &s, &v);
+      h = (h + st->color_shift) % 360;
+      hsv_to_rgb (h, s, v,
+		  &qline->color.red, &qline->color.green, &qline->color.blue);
+
+      qline->color.flags = DoRed | DoGreen | DoBlue;
+      desired = qline->color;
+      if (XAllocColor (st->dpy, st->cmap, &qline->color))
+	{
+	  /* XAllocColor returns the actual RGB that the hardware let us
+	     allocate.  Restore the requested values into the XColor struct
+	     so that limited-resolution hardware doesn't cause the cycle to
+	     get "stuck". */
+	  qline->color.red = desired.red;
+	  qline->color.green = desired.green;
+	  qline->color.blue = desired.blue;
+	}
+      else
+	{
+	  qline->color = prev_qline->color;
+	  if (!XAllocColor (st->dpy, st->cmap, &qline->color))
+	    abort (); /* same color should work */
+	}
+
+# ifdef HAVE_JWXYZ
+          if (st->transparent_p)
+            {
+              /* give a non-opaque alpha to the color */
+              unsigned long pixel = qline->color.pixel;
+              unsigned long amask = BlackPixel (st->dpy, 0);
+              unsigned long a = (0xBBBBBBBB & amask);
+              pixel = (pixel & (~amask)) | a;
+              qline->color.pixel = pixel;
+            }
+# endif /* HAVE_JWXYZ */
+
+      XSetForeground (st->dpy, st->draw_gc, qline->color.pixel);
+    }
+  if (! st->solid_p)
+    {
+      /*  XDrawLine (dpy, window, (transparent_p ? gcs[0][qix->id] : draw_gc),
+	             qline->p1.x, qline->p1.y, qline->p2.x, qline->p2.y);*/
+      XPoint points[MAXPOLY+1];
+      for (i = 0; i < qix->npoly; i++)
+	{
+	  points[i].x = qline->p[i].x >> SCALE;
+	  points[i].y = qline->p[i].y >> SCALE;
+	}
+      points[qix->npoly] = points[0];
+      XDrawLines(st->dpy, st->window, 
+                 (st->transparent_p && st->gcs[0]
+                  ? st->gcs[0][qix->id]
+                  : st->draw_gc),
+		 points, qix->npoly+1, CoordModeOrigin);
+    }
+  else if (!prev_qline->dead)
+    {
+      XPoint points [4];
+      points [0].x = qline->p[0].x >> SCALE;
+      points [0].y = qline->p[0].y >> SCALE;
+      points [1].x = qline->p[1].x >> SCALE;
+      points [1].y = qline->p[1].y >> SCALE;
+      points [2].x = prev_qline->p[1].x >> SCALE;
+      points [2].y = prev_qline->p[1].y >> SCALE;
+      points [3].x = prev_qline->p[0].x >> SCALE;
+      points [3].y = prev_qline->p[0].y >> SCALE;
+      XFillPolygon (st->dpy, st->window,
+                    (st->transparent_p && st->gcs[0]
+                     ? st->gcs[0][qix->id]
+                     : st->draw_gc),
+		    points, 4, Complex, CoordModeOrigin);
+    }
+
+  qline->dead = False;
+}
+
+static void
+qix1 (struct state *st, struct qix *qix)
+{
+  int ofp = qix->fp - 1;
+  if (ofp < 0) ofp = qix->nlines - 1;
+  if (st->gtick++ == 500)
+    get_geom (st), st->gtick = 0;
+  free_qline (st, &qix->lines [qix->fp],
+	      &qix->lines[(qix->fp + 1) % qix->nlines], qix);
+  add_qline (st, &qix->lines[qix->fp], &qix->lines[ofp], qix);
+  if ((++qix->fp) >= qix->nlines)
+    qix->fp = 0;
+}
+
+
+static unsigned long
+qix_draw (Display *dpy, Window window, void *closure)
+{
+  struct state *st = (struct state *) closure;
+  struct qix **q1 = st->qixes;
+  struct qix **qn;
+  for (qn = q1; *qn; qn++)
+    qix1 (st, *qn);
+  return st->delay;
+}
+
+static void
+qix_reshape (Display *dpy, Window window, void *closure, 
+                 unsigned int w, unsigned int h)
+{
+  struct state *st = (struct state *) closure;
+  get_geom (st);
+}
+
+static Bool
+qix_event (Display *dpy, Window window, void *closure, XEvent *event)
+{
+  return False;
+}
+
+static void
+qix_free (Display *dpy, Window window, void *closure)
+{
+  struct state *st = (struct state *) closure;
+  if (st->gcs[0])
+    free (st->gcs[0]);
+  if (st->gcs[1] && st->gcs[0] != st->gcs[1])
+    free (st->gcs[1]);
+  free (st->qixes);
+  free (st);
+}
+
+
+static const char *qix_defaults [] = {
+  ".background:	black",
+  ".foreground:	white",
+  "*fpsSolid:	true",
+  "*count:	4",
+  "*segments:	250",
+  "*poly:	2",
+  "*spread:	8",
+  "*size:	200",
+  "*colorShift:	3",
+  "*solid:	true",
+  "*delay:	10000",
+  "*random:	false",
+  "*xor:	false",
+  "*transparent:true",
+  "*gravity:	false",
+  "*additive:	true",
+#ifdef HAVE_MOBILE
+  "*ignoreRotation: True",
+#endif
+  0
+};
+
+static XrmOptionDescRec qix_options [] = {
+  { "-count",		".count",	XrmoptionSepArg, 0 },
+  { "-segments",	".segments",	XrmoptionSepArg, 0 },
+  { "-poly",		".poly",	XrmoptionSepArg, 0 },
+  { "-spread",		".spread",	XrmoptionSepArg, 0 },
+  { "-size",		".size",	XrmoptionSepArg, 0 },
+  { "-delay",		".delay",	XrmoptionSepArg, 0 },
+  { "-color-shift",	".colorShift",	XrmoptionSepArg, 0 },
+  { "-random",		".random",	XrmoptionNoArg, "true" },
+  { "-linear",		".random",	XrmoptionNoArg, "false" },
+  { "-solid",		".solid",	XrmoptionNoArg, "true" },
+  { "-hollow",		".solid",	XrmoptionNoArg, "false" },
+  { "-xor",		".xor",		XrmoptionNoArg, "true" },
+  { "-no-xor",		".xor",		XrmoptionNoArg, "false" },
+  { "-transparent",	".transparent",	XrmoptionNoArg, "true" },
+  { "-non-transparent",	".transparent",	XrmoptionNoArg, "false" },
+  { "-gravity",		".gravity",	XrmoptionNoArg, "true" },
+  { "-no-gravity",	".gravity",	XrmoptionNoArg, "false" },
+  { "-additive",	".additive",	XrmoptionNoArg, "true" },
+  { "-subtractive",	".additive",	XrmoptionNoArg, "false" },
+  { 0, 0, 0, 0 }
+};
+
+XSCREENSAVER_MODULE ("Qix", qix)