1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
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)
|
