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/* xscreensaver, Copyright (c) 1992, 1995, 1996, 1997, 1998, 2003
* 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"
#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>
*/
#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};
static Pixmap pixmaps [NBITS];
static GC gc;
static int delay;
static unsigned long fg, bg, pixels [512];
static int npixels;
static void
init_greynetic (Display *dpy, Window window)
{
int i;
XGCValues gcv;
XWindowAttributes xgwa;
Colormap cmap;
XGetWindowAttributes (dpy, window, &xgwa);
cmap = xgwa.colormap;
npixels = 0;
gcv.foreground= fg= get_pixel_resource("foreground","Foreground", dpy, cmap);
gcv.background= bg= get_pixel_resource("background","Background", dpy, cmap);
gcv.fill_style= FillOpaqueStippled;
gc = XCreateGC (dpy, window, GCForeground|GCBackground|GCFillStyle, &gcv);
delay = get_integer_resource ("delay", "Integer");
if (delay < 0) delay = 0;
i = 0;
#define BITS(n,w,h) \
pixmaps [i++] = \
XCreatePixmapFromBitmapData (dpy, 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);
}
static void
greynetic (Display *dpy, Window window)
{
static int tick = 500, xlim, ylim;
static Colormap cmap;
int x, y, w=0, h=0, i;
XGCValues gcv;
if (tick++ == 500)
{
XWindowAttributes xgwa;
XGetWindowAttributes (dpy, window, &xgwa);
tick = 0;
xlim = xgwa.width;
ylim = xgwa.height;
cmap = xgwa.colormap;
}
for (i = 0; i < 10; i++) /* minimize area, but don't try too hard */
{
w = 50 + random () % (xlim - 50);
h = 50 + random () % (ylim - 50);
if (w + h < xlim && w + h < ylim)
break;
}
x = random () % (xlim - w);
y = random () % (ylim - h);
gcv.stipple = pixmaps [random () % NBITS];
if (mono_p)
{
MONO:
if (random () & 1)
gcv.foreground = fg, gcv.background = bg;
else
gcv.foreground = bg, gcv.background = fg;
}
else
{
XColor fgc, bgc;
if (npixels == sizeof (pixels) / sizeof (unsigned long))
goto REUSE;
fgc.flags = bgc.flags = DoRed|DoGreen|DoBlue;
fgc.red = random ();
fgc.green = random ();
fgc.blue = random ();
bgc.red = random ();
bgc.green = random ();
bgc.blue = random ();
if (! XAllocColor (dpy, cmap, &fgc))
goto REUSE;
pixels [npixels++] = fgc.pixel;
gcv.foreground = fgc.pixel;
if (! XAllocColor (dpy, cmap, &bgc))
goto REUSE;
pixels [npixels++] = bgc.pixel;
gcv.background = bgc.pixel;
goto DONE;
REUSE:
if (npixels <= 0)
{
mono_p = 1;
goto MONO;
}
gcv.foreground = pixels [random () % npixels];
gcv.background = pixels [random () % npixels];
DONE:
;
}
XChangeGC (dpy, gc, GCStipple|GCForeground|GCBackground, &gcv);
XFillRectangle (dpy, window, gc, x, y, w, h);
XSync (dpy, False);
}
char *progclass = "Greynetic";
char *defaults [] = {
".background: black",
".foreground: white",
"*delay: 10000",
0
};
XrmOptionDescRec options [] = {
{ "-delay", ".delay", XrmoptionSepArg, 0 },
{ 0, 0, 0, 0 }
};
void
screenhack (Display *dpy, Window window)
{
init_greynetic (dpy, window);
while (1)
{
greynetic (dpy, window);
screenhack_handle_events (dpy);
if (delay) usleep (delay);
}
}
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