+++ /dev/null
-/* xscreensaver, Copyright (c) 1992, 1995 Jamie Zawinski <jwz@netscape.com>
- *
- * 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 <stdio.h>
-
-struct qpoint {
- int x, y;
- int dx, dy;
-};
-
-struct qline {
- struct qpoint p1, p2;
- XColor color;
- Bool dead;
-};
-
-struct qix {
- int id;
- int fp;
- int nlines;
- struct qline *lines;
-};
-
-static GC draw_gc, erase_gc;
-static unsigned int default_fg_pixel;
-static int maxx, maxy, max_spread, max_size, color_shift;
-static Bool random_p, solid_p, xor_p, transparent_p;
-static int delay;
-static int count;
-static Colormap cmap;
-static unsigned long base_pixel;
-
-static GC *gcs[2];
-
-static void
-get_geom (dpy, window)
- Display *dpy;
- Window window;
-{
- XWindowAttributes xgwa;
- XGetWindowAttributes (dpy, window, &xgwa);
- maxx = xgwa.width;
- maxy = xgwa.height;
-}
-
-static struct qix *
-init_one_qix (dpy, window, nlines)
- Display *dpy;
- Window window;
- int nlines;
-{
- int i;
- struct qix *qix = (struct qix *) calloc (1, sizeof (struct qix));
- qix->nlines = nlines;
- qix->lines = (struct qline *) calloc (qix->nlines, sizeof (struct qline));
-
- if (!mono_p && !transparent_p)
- {
- 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 (dpy, cmap, &qix->lines[0].color))
- {
- qix->lines[0].color.pixel = default_fg_pixel;
- XQueryColor (dpy, cmap, &qix->lines[0].color);
- if (!XAllocColor (dpy, cmap, &qix->lines[0].color))
- abort ();
- }
- }
- qix->lines[0].p1.x = random () % maxx;
- qix->lines[0].p1.y = random () % maxy;
- if (max_size == 0)
- {
- qix->lines[0].p2.x = random () % maxx;
- qix->lines[0].p2.y = random () % maxy;
- }
- else
- {
- qix->lines[0].p2.x = qix->lines[0].p1.x + (random () % (max_size/2));
- qix->lines[0].p2.y = qix->lines[0].p1.y + (random () % (max_size/2));
- if (qix->lines[0].p2.x > maxx) qix->lines[0].p2.x = maxx;
- if (qix->lines[0].p2.y > maxy) qix->lines[0].p2.y = maxy;
- }
- qix->lines[0].p1.dx = (random () % (max_spread + 1)) - (max_spread / 2);
- qix->lines[0].p1.dy = (random () % (max_spread + 1)) - (max_spread / 2);
- qix->lines[0].p2.dx = (random () % (max_spread + 1)) - (max_spread / 2);
- qix->lines[0].p2.dy = (random () % (max_spread + 1)) - (max_spread / 2);
- qix->lines[0].dead = True;
- for (i = 1; i < qix->nlines; i++)
- {
- qix->lines[i] = qix->lines[0];
- if (!mono_p && !transparent_p)
- if (!XAllocColor (dpy, cmap, &qix->lines[i].color))
- abort ();
- }
- return qix;
-}
-
-/* I don't believe this fucking language doesn't have builtin exponentiation.
- I further can't believe that the fucking ^ character means fucking XOR!! */
-static int i_exp(i,j)
- int i, j;
-{
- int k = 1;
- while (j--) k *= i;
- return k;
-}
-
-
-static void
-merge_colors (argc, argv, into_color, mask, increment_p)
- int argc;
- XColor **argv;
- XColor *into_color;
- int mask;
- Bool increment_p;
-{
- int j;
- *into_color = *argv [0];
- into_color->pixel |= mask;
-#define SHORT_INC(x,y) (x = ((((x)+(y)) > 0xFFFF) ? 0xFFFF : ((x)+(y))))
-#define SHORT_DEC(x,y) (x = ((((x)-(y)) < 0) ? 0 : ((x)-(y))))
- for (j = 1; j < argc; j++)
- if (increment_p)
- {
- SHORT_INC (into_color->red, argv[j]->red);
- SHORT_INC (into_color->green, argv[j]->green);
- SHORT_INC (into_color->blue, argv[j]->blue);
- }
- else
- {
- SHORT_DEC (into_color->red, argv[j]->red);
- SHORT_DEC (into_color->green, argv[j]->green);
- SHORT_DEC (into_color->blue, argv[j]->blue);
- }
-#undef SHORT_INC
-#undef SHORT_DEC
-}
-
-/* fill in all the permutations of colors that XAllocColorCells() has
- allocated for us. Thanks Ron, you're an additive kind of guy. */
-static void
-permute_colors (pcolors, colors, count, plane_masks, increment_p)
- XColor *pcolors, *colors;
- int count;
- unsigned long *plane_masks;
- Bool increment_p;
-{
- int out = 0;
- int max = i_exp (2, count);
- if (count > 31) abort ();
- for (out = 1; out < max; out++)
- {
- XColor *argv [32];
- int this_mask = 0;
- int argc = 0;
- int bit;
- for (bit = 0; bit < 32; bit++)
- if (out & (1<<bit))
- {
- argv [argc++] = &pcolors [bit];
- this_mask |= plane_masks [bit];
- }
- merge_colors (argc, argv, &colors [out-1], this_mask, increment_p);
- }
-}
-
-
-static struct qix **
-init_qix (dpy, window)
- Display *dpy;
- Window window;
-{
- int nlines;
- struct qix **qixes;
- XGCValues gcv;
- XWindowAttributes xgwa;
- XGetWindowAttributes (dpy, window, &xgwa);
- cmap = xgwa.colormap;
- count = get_integer_resource ("count", "Integer");
- if (count <= 0) count = 1;
- nlines = get_integer_resource ("segments", "Integer");
- if (nlines <= 0) nlines = 20;
- get_geom (dpy, window);
- max_spread = get_integer_resource ("spread", "Integer");
- if (max_spread <= 0) max_spread = 10;
- max_size = get_integer_resource ("size", "Integer");
- if (max_size < 0) max_size = 0;
- random_p = get_boolean_resource ("random", "Boolean");
- solid_p = get_boolean_resource ("solid", "Boolean");
- xor_p = get_boolean_resource ("xor", "Boolean");
- transparent_p = get_boolean_resource ("transparent", "Boolean");
- delay = get_integer_resource ("delay", "Integer");
- color_shift = get_integer_resource ("colorShift", "Integer");
- if (color_shift < 0 || color_shift >= 360) color_shift = 5;
- if (delay < 0) delay = 0;
-
- if (count == 1 && transparent_p)
- transparent_p = False; /* it's a no-op */
-
- if (transparent_p && CellsOfScreen (DefaultScreenOfDisplay (dpy)) <= 2)
- {
- fprintf (stderr, "%s: -transparent only works on color displays.\n",
- progname);
- transparent_p = False;
- }
-
- if (xor_p && !transparent_p)
- mono_p = True;
-
- gcs[0] = gcs[1] = 0;
- gcv.foreground = default_fg_pixel =
- get_pixel_resource ("foreground", "Foreground", dpy, cmap);
-
- if (transparent_p)
- {
- Bool increment_p = get_boolean_resource ("additive", "Boolean");
- unsigned long plane_masks [32];
- XColor *pcolors, *colors;
- int nplanes = count;
- int i, total_colors;
-
- /* permutations would be harder if the number of planes didn't fit
- in an int. Who has >32-bit displays anyway... */
- if (nplanes > 31) nplanes = 31;
-
- while (nplanes > 1 &&
- !XAllocColorCells (dpy, cmap, False, plane_masks, nplanes,
- &base_pixel, 1))
- nplanes--;
-
- if (nplanes <= 1)
- {
- fprintf (stderr,
- "%s: couldn't allocate any color planes; turning -transparent off.\n",
- progname);
- transparent_p = False;
- if (xor_p)
- goto NON_TRANSPARENT_XOR;
- else
- goto NON_TRANSPARENT;
- }
- else if (nplanes != count)
- {
- fprintf (stderr,
- "%s: only allocated %d color planes (instead of %d).\n",
- progname, nplanes, count);
- count = nplanes;
- }
-
- gcs[0] = (GC *) malloc (count * sizeof (GC));
- gcs[1] = xor_p ? gcs[0] : (GC *) malloc (count * sizeof (GC));
- total_colors = i_exp (2, count);
- pcolors = (XColor *) calloc (count, sizeof (XColor));
- colors = (XColor *) calloc (total_colors, sizeof (XColor));
- for (i = 0; i < count; i++)
- {
- gcv.plane_mask = plane_masks [i];
- gcv.foreground = ~0;
- if (xor_p)
- {
- gcv.function = GXxor;
- gcs [0][i] = XCreateGC (dpy, window,
- GCForeground|GCFunction|GCPlaneMask,
- &gcv);
- }
- else
- {
- gcs [0][i] = XCreateGC (dpy, window, GCForeground|GCPlaneMask,
- &gcv);
- gcv.foreground = 0;
- gcs [1][i] = XCreateGC (dpy, window, GCForeground|GCPlaneMask,
- &gcv);
- }
-
- /* pick the "primary" (not in that sense) colors.
- If we are in subtractive mode, pick higher intensities. */
- hsv_to_rgb (random () % 360, frand (1.0),
- frand (0.5) + (increment_p ? 0.2 : 0.5),
- &pcolors[i].red, &pcolors[i].green, &pcolors[i].blue);
-
- pcolors [i].flags = DoRed | DoGreen | DoBlue;
- pcolors [i].pixel = base_pixel | plane_masks [i];
- }
- permute_colors (pcolors, colors, count, plane_masks, increment_p);
- /* clone the default background of the window into our "base" pixel */
- colors [total_colors - 1].pixel =
- get_pixel_resource ("background", "Background", dpy, cmap);
- XQueryColor (dpy, cmap, &colors [total_colors - 1]);
- colors [total_colors - 1].pixel = base_pixel;
- XStoreColors (dpy, cmap, colors, total_colors);
- XSetWindowBackground (dpy, window, base_pixel);
- XClearWindow (dpy, window);
- }
- else if (xor_p)
- {
- NON_TRANSPARENT_XOR:
- gcv.function = GXxor;
- gcv.foreground =
- (default_fg_pixel ^ get_pixel_resource ("background", "Background",
- dpy, cmap));
- draw_gc = erase_gc = XCreateGC(dpy,window,GCForeground|GCFunction,&gcv);
- }
- else
- {
- NON_TRANSPARENT:
- draw_gc = XCreateGC (dpy, window, GCForeground, &gcv);
- gcv.foreground = get_pixel_resource ("background", "Background",
- dpy, cmap);
- erase_gc = XCreateGC (dpy, window, GCForeground, &gcv);
- }
-
- qixes = (struct qix **) malloc ((count + 1) * sizeof (struct qix *));
- qixes [count] = 0;
- while (count--)
- {
- qixes [count] = init_one_qix (dpy, window, nlines);
- qixes [count]->id = count;
- }
- return qixes;
-}
-
-static void
-free_qline (dpy, window, cmap, qline, prev, qix)
- Display *dpy;
- Window window;
- Colormap cmap;
- struct qline *qline, *prev;
- struct qix *qix;
-{
- if (qline->dead || !prev)
- ;
- else if (solid_p)
- {
- XPoint points [4];
- points [0].x = qline->p1.x; points [0].y = qline->p1.y;
- points [1].x = qline->p2.x; points [1].y = qline->p2.y;
- points [2].x = prev->p2.x; points [2].y = prev->p2.y;
- points [3].x = prev->p1.x; points [3].y = prev->p1.y;
- XFillPolygon (dpy, window, (transparent_p ? gcs[1][qix->id] : 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);
-
- if (!mono_p && !transparent_p)
- XFreeColors (dpy, cmap, &qline->color.pixel, 1, 0);
-
- qline->dead = True;
-}
-
-static void
-add_qline (dpy, window, cmap, qline, prev_qline, qix)
- Display *dpy;
- Window window;
- Colormap cmap;
- struct qline *qline, *prev_qline;
- struct qix *qix;
-{
- *qline = *prev_qline;
-
-#define wiggle(point,delta,max) \
- if (random_p) delta += (random () % 3) - 1; \
- if (delta > max_spread) delta = max_spread; \
- else if (delta < -max_spread) delta = -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;
-
- wiggle (qline->p1.x, qline->p1.dx, maxx);
- wiggle (qline->p1.y, qline->p1.dy, maxy);
- wiggle (qline->p2.x, qline->p2.dx, maxx);
- wiggle (qline->p2.y, qline->p2.dy, maxy);
-
- if (max_size)
- {
- if (qline->p1.x - qline->p2.x > max_size)
- qline->p1.x = qline->p2.x + max_size
- - (random_p ? random() % max_spread : 0);
- else if (qline->p2.x - qline->p1.x > max_size)
- qline->p2.x = qline->p1.x + max_size
- - (random_p ? random() % max_spread : 0);
- if (qline->p1.y - qline->p2.y > max_size)
- qline->p1.y = qline->p2.y + max_size
- - (random_p ? random() % max_spread : 0);
- else if (qline->p2.y - qline->p1.y > max_size)
- qline->p2.y = qline->p1.y + max_size
- - (random_p ? random() % max_spread : 0);
- }
-
- if (!mono_p && !transparent_p)
- {
- XColor desired;
- cycle_hue (&qline->color, color_shift);
- qline->color.flags = DoRed | DoGreen | DoBlue;
- desired = qline->color;
- if (XAllocColor (dpy, 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 cycle_hue 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 (dpy, cmap, &qline->color))
- abort (); /* same color should work */
- }
- XSetForeground (dpy, draw_gc, qline->color.pixel);
- }
- if (! 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);
- else if (!prev_qline->dead)
- {
- XPoint points [4];
- points [0].x = qline->p1.x; points [0].y = qline->p1.y;
- points [1].x = qline->p2.x; points [1].y = qline->p2.y;
- points [2].x = prev_qline->p2.x; points [2].y = prev_qline->p2.y;
- points [3].x = prev_qline->p1.x; points [3].y = prev_qline->p1.y;
- XFillPolygon (dpy, window, (transparent_p ? gcs[0][qix->id] : draw_gc),
- points, 4, Complex, CoordModeOrigin);
- }
-
- qline->dead = False;
-}
-
-static void
-qix1 (dpy, window, qix)
- Display *dpy;
- Window window;
- struct qix *qix;
-{
- int ofp = qix->fp - 1;
- static int gtick = 0;
- if (gtick++ == 500)
- get_geom (dpy, window), gtick = 0;
- if (ofp < 0) ofp = qix->nlines - 1;
- free_qline (dpy, window, cmap, &qix->lines [qix->fp],
- &qix->lines[(qix->fp + 1) % qix->nlines], qix);
- add_qline (dpy, window, cmap, &qix->lines[qix->fp], &qix->lines[ofp], qix);
- if ((++qix->fp) >= qix->nlines)
- qix->fp = 0;
-}
-
-\f
-char *progclass = "Qix";
-
-char *defaults [] = {
- "Qix.background: black", /* to placate SGI */
- "Qix.foreground: white",
- "*count: 1",
- "*segments: 50",
- "*spread: 8",
- "*size: 0",
- "*colorShift: 3",
- "*solid: false",
- "*delay: 10000",
- "*random: true",
- "*xor: false",
- "*transparent:false",
- "*additive: true",
- 0
-};
-
-XrmOptionDescRec options [] = {
- { "-count", ".count", XrmoptionSepArg, 0 },
- { "-segments", ".segments", 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" },
- { "-additive", ".additive", XrmoptionNoArg, "true" },
- { "-subtractive", ".additive", XrmoptionNoArg, "false" },
-};
-int options_size = (sizeof (options) / sizeof (options[0]));
-
-void
-screenhack (dpy, window)
- Display *dpy;
- Window window;
-{
- struct qix **q1 = init_qix (dpy, window);
- struct qix **qn;
- while (1)
- for (qn = q1; *qn; qn++)
- {
- qix1 (dpy, window, *qn);
- XSync (dpy, True);
- if (delay) usleep (delay);
- }
-}
projects / xscreensaver / blobdiff