| 1 | /* xscreensaver, Copyright (c) 1992-2008 Jamie Zawinski <jwz@jwz.org> |
| 2 | * |
| 3 | * Permission to use, copy, modify, distribute, and sell this software and its |
| 4 | * documentation for any purpose is hereby granted without fee, provided that |
| 5 | * the above copyright notice appear in all copies and that both that |
| 6 | * copyright notice and this permission notice appear in supporting |
| 7 | * documentation. No representations are made about the suitability of this |
| 8 | * software for any purpose. It is provided "as is" without express or |
| 9 | * implied warranty. |
| 10 | */ |
| 11 | |
| 12 | #include "screenhack.h" |
| 13 | |
| 14 | #ifndef HAVE_JWXYZ |
| 15 | # define DO_STIPPLE |
| 16 | #endif |
| 17 | |
| 18 | #define NBITS 12 |
| 19 | |
| 20 | /* On some systems (notably MacOS X) these files are messed up. |
| 21 | * They're tiny, so we might as well just inline them here. |
| 22 | * |
| 23 | * # include <X11/bitmaps/stipple> |
| 24 | * # include <X11/bitmaps/cross_weave> |
| 25 | * # include <X11/bitmaps/dimple1> |
| 26 | * # include <X11/bitmaps/dimple3> |
| 27 | * # include <X11/bitmaps/flipped_gray> |
| 28 | * # include <X11/bitmaps/gray1> |
| 29 | * # include <X11/bitmaps/gray3> |
| 30 | * # include <X11/bitmaps/hlines2> |
| 31 | * # include <X11/bitmaps/light_gray> |
| 32 | * # include <X11/bitmaps/root_weave> |
| 33 | * # include <X11/bitmaps/vlines2> |
| 34 | * # include <X11/bitmaps/vlines3> |
| 35 | */ |
| 36 | |
| 37 | #ifdef DO_STIPPLE |
| 38 | #define stipple_width 16 |
| 39 | #define stipple_height 4 |
| 40 | static unsigned char stipple_bits[] = { |
| 41 | 0x55, 0x55, 0xee, 0xee, 0x55, 0x55, 0xba, 0xbb}; |
| 42 | |
| 43 | #define cross_weave_width 16 |
| 44 | #define cross_weave_height 16 |
| 45 | static unsigned char cross_weave_bits[] = { |
| 46 | 0x55, 0x55, 0x88, 0x88, 0x55, 0x55, 0x22, 0x22, 0x55, 0x55, 0x88, 0x88, |
| 47 | 0x55, 0x55, 0x22, 0x22, 0x55, 0x55, 0x88, 0x88, 0x55, 0x55, 0x22, 0x22, |
| 48 | 0x55, 0x55, 0x88, 0x88, 0x55, 0x55, 0x22, 0x22}; |
| 49 | |
| 50 | #define dimple1_width 16 |
| 51 | #define dimple1_height 16 |
| 52 | static unsigned char dimple1_bits[] = { |
| 53 | 0x55, 0x55, 0x00, 0x00, 0x55, 0x55, 0x00, 0x00, 0x55, 0x55, 0x00, 0x00, |
| 54 | 0x55, 0x55, 0x00, 0x00, 0x55, 0x55, 0x00, 0x00, 0x55, 0x55, 0x00, 0x00, |
| 55 | 0x55, 0x55, 0x00, 0x00, 0x55, 0x55, 0x00, 0x00}; |
| 56 | |
| 57 | #define dimple3_width 16 |
| 58 | #define dimple3_height 16 |
| 59 | static unsigned char dimple3_bits[] = { |
| 60 | 0x11, 0x11, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x11, 0x11, 0x00, 0x00, |
| 61 | 0x00, 0x00, 0x00, 0x00, 0x11, 0x11, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
| 62 | 0x11, 0x11, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}; |
| 63 | |
| 64 | #define flipped_gray_width 4 |
| 65 | #define flipped_gray_height 2 |
| 66 | static char flipped_gray_bits[] = { 0x07, 0x0d}; |
| 67 | #define gray1_width 2 |
| 68 | #define gray1_height 2 |
| 69 | static char gray1_bits[] = { 0x01, 0x02}; |
| 70 | #define gray3_width 4 |
| 71 | #define gray3_height 4 |
| 72 | static char gray3_bits[] = { 0x01, 0x00, 0x04, 0x00}; |
| 73 | #define hlines2_width 1 |
| 74 | #define hlines2_height 2 |
| 75 | static char hlines2_bits[] = { 0x01, 0x00}; |
| 76 | #define light_gray_width 4 |
| 77 | #define light_gray_height 2 |
| 78 | static char light_gray_bits[] = { 0x08, 0x02}; |
| 79 | #define root_weave_width 4 |
| 80 | #define root_weave_height 4 |
| 81 | static char root_weave_bits[] = { 0x07, 0x0d, 0x0b, 0x0e}; |
| 82 | #define vlines2_width 2 |
| 83 | #define vlines2_height 1 |
| 84 | static char vlines2_bits[] = { 0x01}; |
| 85 | #define vlines3_width 3 |
| 86 | #define vlines3_height 1 |
| 87 | static char vlines3_bits[] = { 0x02}; |
| 88 | |
| 89 | #endif /* DO_STIPPLE */ |
| 90 | |
| 91 | struct state { |
| 92 | Display *dpy; |
| 93 | Window window; |
| 94 | |
| 95 | Pixmap pixmaps [NBITS]; |
| 96 | |
| 97 | GC gc; |
| 98 | int delay; |
| 99 | unsigned long fg, bg, pixels [512]; |
| 100 | int npixels; |
| 101 | int xlim, ylim; |
| 102 | Bool grey_p; |
| 103 | Colormap cmap; |
| 104 | }; |
| 105 | |
| 106 | |
| 107 | static void * |
| 108 | greynetic_init (Display *dpy, Window window) |
| 109 | { |
| 110 | struct state *st = (struct state *) calloc (1, sizeof(*st)); |
| 111 | # ifdef DO_STIPPLE |
| 112 | int i; |
| 113 | # endif /* DO_STIPPLE */ |
| 114 | XGCValues gcv; |
| 115 | XWindowAttributes xgwa; |
| 116 | st->dpy = dpy; |
| 117 | st->window = window; |
| 118 | |
| 119 | XGetWindowAttributes (st->dpy, st->window, &xgwa); |
| 120 | st->xlim = xgwa.width; |
| 121 | st->ylim = xgwa.height; |
| 122 | st->cmap = xgwa.colormap; |
| 123 | st->npixels = 0; |
| 124 | st->grey_p = get_boolean_resource(st->dpy, "grey", "Boolean"); |
| 125 | gcv.foreground= st->fg= get_pixel_resource(st->dpy, st->cmap, "foreground","Foreground"); |
| 126 | gcv.background= st->bg= get_pixel_resource(st->dpy, st->cmap, "background","Background"); |
| 127 | |
| 128 | st->delay = get_integer_resource (st->dpy, "delay", "Integer"); |
| 129 | if (st->delay < 0) st->delay = 0; |
| 130 | |
| 131 | # ifndef DO_STIPPLE |
| 132 | st->gc = XCreateGC (st->dpy, st->window, GCForeground, &gcv); |
| 133 | # ifdef HAVE_JWXYZ /* allow non-opaque alpha components in pixel values */ |
| 134 | jwxyz_XSetAlphaAllowed (st->dpy, st->gc, True); |
| 135 | # endif /* HAVE_JWXYZ */ |
| 136 | # else /* DO_STIPPLE */ |
| 137 | gcv.fill_style= FillOpaqueStippled; |
| 138 | st->gc = XCreateGC (st->dpy, st->window, GCForeground|GCBackground|GCFillStyle, &gcv); |
| 139 | |
| 140 | i = 0; |
| 141 | # define BITS(n,w,h) \ |
| 142 | st->pixmaps [i++] = \ |
| 143 | XCreatePixmapFromBitmapData (st->dpy, st->window, (char *) n, w, h, 1, 0, 1) |
| 144 | |
| 145 | BITS (stipple_bits, stipple_width, stipple_height); |
| 146 | BITS (cross_weave_bits, cross_weave_width, cross_weave_height); |
| 147 | BITS (dimple1_bits, dimple1_width, dimple1_height); |
| 148 | BITS (dimple3_bits, dimple3_width, dimple3_height); |
| 149 | BITS (flipped_gray_bits, flipped_gray_width, flipped_gray_height); |
| 150 | BITS (gray1_bits, gray1_width, gray1_height); |
| 151 | BITS (gray3_bits, gray3_width, gray3_height); |
| 152 | BITS (hlines2_bits, hlines2_width, hlines2_height); |
| 153 | BITS (light_gray_bits, light_gray_width, light_gray_height); |
| 154 | BITS (root_weave_bits, root_weave_width, root_weave_height); |
| 155 | BITS (vlines2_bits, vlines2_width, vlines2_height); |
| 156 | BITS (vlines3_bits, vlines3_width, vlines3_height); |
| 157 | # endif /* DO_STIPPLE */ |
| 158 | return st; |
| 159 | } |
| 160 | |
| 161 | static unsigned long |
| 162 | greynetic_draw (Display *dpy, Window window, void *closure) |
| 163 | { |
| 164 | struct state *st = (struct state *) closure; |
| 165 | int x, y, w=0, h=0, i; |
| 166 | XGCValues gcv; |
| 167 | |
| 168 | for (i = 0; i < 10; i++) /* minimize area, but don't try too hard */ |
| 169 | { |
| 170 | w = 50 + random () % (st->xlim - 50); |
| 171 | h = 50 + random () % (st->ylim - 50); |
| 172 | if (w + h < st->xlim && w + h < st->ylim) |
| 173 | break; |
| 174 | } |
| 175 | x = random () % (st->xlim - w); |
| 176 | y = random () % (st->ylim - h); |
| 177 | # ifdef DO_STIPPLE |
| 178 | gcv.stipple = st->pixmaps [random () % NBITS]; |
| 179 | # endif /* !DO_STIPPLE */ |
| 180 | if (mono_p) |
| 181 | { |
| 182 | MONO: |
| 183 | if (random () & 1) |
| 184 | gcv.foreground = st->fg, gcv.background = st->bg; |
| 185 | else |
| 186 | gcv.foreground = st->bg, gcv.background = st->fg; |
| 187 | } |
| 188 | else |
| 189 | { |
| 190 | XColor fgc, bgc; |
| 191 | if (st->npixels == sizeof (st->pixels) / sizeof (unsigned long)) |
| 192 | goto REUSE; |
| 193 | fgc.flags = bgc.flags = DoRed|DoGreen|DoBlue; |
| 194 | fgc.red = random (); |
| 195 | fgc.green = random (); |
| 196 | fgc.blue = random (); |
| 197 | # ifdef DO_STIPPLE |
| 198 | bgc.red = random (); |
| 199 | bgc.green = random (); |
| 200 | bgc.blue = random (); |
| 201 | # endif /* DO_STIPPLE */ |
| 202 | |
| 203 | if (st->grey_p) |
| 204 | { |
| 205 | fgc.green = fgc.blue = fgc.red; |
| 206 | bgc.green = bgc.blue = bgc.red; |
| 207 | } |
| 208 | |
| 209 | if (! XAllocColor (st->dpy, st->cmap, &fgc)) |
| 210 | goto REUSE; |
| 211 | st->pixels [st->npixels++] = fgc.pixel; |
| 212 | gcv.foreground = fgc.pixel; |
| 213 | # ifdef DO_STIPPLE |
| 214 | if (! XAllocColor (st->dpy, st->cmap, &bgc)) |
| 215 | goto REUSE; |
| 216 | st->pixels [st->npixels++] = bgc.pixel; |
| 217 | gcv.background = bgc.pixel; |
| 218 | # endif /* DO_STIPPLE */ |
| 219 | goto DONE; |
| 220 | REUSE: |
| 221 | if (st->npixels <= 0) |
| 222 | { |
| 223 | mono_p = 1; |
| 224 | goto MONO; |
| 225 | } |
| 226 | gcv.foreground = st->pixels [random () % st->npixels]; |
| 227 | # ifdef DO_STIPPLE |
| 228 | gcv.background = st->pixels [random () % st->npixels]; |
| 229 | # endif /* DO_STIPPLE */ |
| 230 | DONE: |
| 231 | ; |
| 232 | |
| 233 | # ifdef HAVE_JWXYZ |
| 234 | { |
| 235 | /* give a non-opaque alpha to the color */ |
| 236 | unsigned long pixel = gcv.foreground; |
| 237 | unsigned long amask = BlackPixel (dpy,0); |
| 238 | unsigned long a = (random() & amask); |
| 239 | pixel = (pixel & (~amask)) | a; |
| 240 | gcv.foreground = pixel; |
| 241 | } |
| 242 | # endif /* !HAVE_JWXYZ */ |
| 243 | } |
| 244 | # ifndef DO_STIPPLE |
| 245 | XChangeGC (st->dpy, st->gc, GCForeground, &gcv); |
| 246 | # else /* DO_STIPPLE */ |
| 247 | XChangeGC (st->dpy, st->gc, GCStipple|GCForeground|GCBackground, &gcv); |
| 248 | # endif /* DO_STIPPLE */ |
| 249 | XFillRectangle (st->dpy, st->window, st->gc, x, y, w, h); |
| 250 | return st->delay; |
| 251 | } |
| 252 | |
| 253 | \f |
| 254 | static const char *greynetic_defaults [] = { |
| 255 | ".background: black", |
| 256 | ".foreground: white", |
| 257 | "*fpsSolid: true", |
| 258 | "*delay: 10000", |
| 259 | "*grey: false", |
| 260 | #ifdef HAVE_MOBILE |
| 261 | "*ignoreRotation: True", |
| 262 | #endif |
| 263 | 0 |
| 264 | }; |
| 265 | |
| 266 | static XrmOptionDescRec greynetic_options [] = { |
| 267 | { "-delay", ".delay", XrmoptionSepArg, 0 }, |
| 268 | { "-grey", ".grey", XrmoptionNoArg, "True" }, |
| 269 | { 0, 0, 0, 0 } |
| 270 | }; |
| 271 | |
| 272 | static void |
| 273 | greynetic_reshape (Display *dpy, Window window, void *closure, |
| 274 | unsigned int w, unsigned int h) |
| 275 | { |
| 276 | struct state *st = (struct state *) closure; |
| 277 | st->xlim = w; |
| 278 | st->ylim = h; |
| 279 | } |
| 280 | |
| 281 | static Bool |
| 282 | greynetic_event (Display *dpy, Window window, void *closure, XEvent *event) |
| 283 | { |
| 284 | return False; |
| 285 | } |
| 286 | |
| 287 | static void |
| 288 | greynetic_free (Display *dpy, Window window, void *closure) |
| 289 | { |
| 290 | struct state *st = (struct state *) closure; |
| 291 | XFreeGC (st->dpy, st->gc); |
| 292 | free (st); |
| 293 | } |
| 294 | |
| 295 | XSCREENSAVER_MODULE ("Greynetic", greynetic) |
| 296 | |