1 /* xscreensaver, Copyright (c) 1992, 1993, 1994, 1996, 1997, 1998
2 * Jamie Zawinski <jwz@jwz.org>
4 * Permission to use, copy, modify, distribute, and sell this software and its
5 * documentation for any purpose is hereby granted without fee, provided that
6 * the above copyright notice appear in all copies and that both that
7 * copyright notice and this permission notice appear in supporting
8 * documentation. No representations are made about the suitability of this
9 * software for any purpose. It is provided "as is" without express or
13 #include "screenhack.h"
17 static int hole_x, hole_y;
18 static int bitmap_w, bitmap_h;
19 static int xoff, yoff;
20 static int grid_w, grid_h;
21 static int delay, delay2;
23 static int max_width, max_height;
26 init_slide (Display *dpy, Window window)
30 XWindowAttributes xgwa;
38 XGetWindowAttributes (dpy, window, &xgwa);
39 grab_screen_image (xgwa.screen, window);
42 max_width = xgwa.width;
43 max_height = xgwa.height;
45 delay = get_integer_resource ("delay", "Integer");
46 delay2 = get_integer_resource ("delay2", "Integer");
47 grid_size = get_integer_resource ("gridSize", "Integer");
48 pix_inc = get_integer_resource ("pixelIncrement", "Integer");
49 border = get_integer_resource ("internalBorderWidth", "InternalBorderWidth");
53 char *fgs = get_string_resource("background", "Background");
54 char *bgs = get_string_resource("foreground", "Foreground");
56 if (!XParseColor (dpy, cmap, fgs, &fgc))
57 XParseColor (dpy, cmap, "black", &bgc);
58 if (!XParseColor (dpy, cmap, bgs, &bgc))
59 XParseColor (dpy, cmap, "gray", &fgc);
61 fg_ok = XAllocColor (dpy, cmap, &fgc);
62 bg_ok = XAllocColor (dpy, cmap, &bgc);
64 /* If we weren't able to allocate the two colors we want from the
65 colormap (which is likely if the screen has been grabbed on an
66 8-bit SGI visual -- don't ask) then just go through the map
67 and find the closest color to the ones we wanted, and use those
68 pixels without actually allocating them.
82 unsigned long fgd = ~0;
83 unsigned long bgd = ~0;
84 int max = visual_cells (xgwa.screen, visual);
85 XColor *all = (XColor *) calloc(sizeof (*all), max);
86 for (i = 0; i < max; i++)
88 all[i].flags = DoRed|DoGreen|DoBlue;
91 XQueryColors (dpy, cmap, all, max);
92 for(i = 0; i < max; i++)
98 rd = (all[i].red >> 8) - (fgc.red >> 8);
99 gd = (all[i].green >> 8) - (fgc.green >> 8);
100 bd = (all[i].blue >> 8) - (fgc.blue >> 8);
101 if (rd < 0) rd = -rd;
102 if (gd < 0) gd = -gd;
103 if (bd < 0) bd = -bd;
104 d = (rd << 1) + (gd << 2) + bd;
116 rd = (all[i].red >> 8) - (bgc.red >> 8);
117 gd = (all[i].green >> 8) - (bgc.green >> 8);
118 bd = (all[i].blue >> 8) - (bgc.blue >> 8);
119 if (rd < 0) rd = -rd;
120 if (gd < 0) gd = -gd;
121 if (bd < 0) bd = -bd;
122 d = (rd << 1) + (gd << 2) + bd;
140 if (delay < 0) delay = 0;
141 if (delay2 < 0) delay2 = 0;
142 if (pix_inc < 1) pix_inc = 1;
143 if (grid_size < 1) grid_size = 1;
146 gcv.function = GXcopy;
147 gcv.subwindow_mode = IncludeInferiors;
148 gcflags = GCForeground |GCFunction;
149 if (use_subwindow_mode_p(xgwa.screen, window)) /* see grabscreen.c */
150 gcflags |= GCSubwindowMode;
151 gc = XCreateGC (dpy, window, gcflags, &gcv);
153 XGetWindowAttributes (dpy, window, &xgwa);
154 bitmap_w = xgwa.width;
155 bitmap_h = xgwa.height;
157 grid_w = bitmap_w / grid_size;
158 grid_h = bitmap_h / grid_size;
159 hole_x = random () % grid_w;
160 hole_y = random () % grid_h;
161 xoff = (bitmap_w - (grid_w * grid_size)) / 2;
162 yoff = (bitmap_h - (grid_h * grid_size)) / 2;
169 int half2 = (border & 1 ? half+1 : half);
170 XSetForeground(dpy, gc, bg);
171 for (i = 0; i < bitmap_w; i += grid_size)
174 for (j = 0; j < bitmap_h; j += grid_size)
175 XDrawRectangle (dpy, d, gc,
176 xoff+i+half2, yoff+j+half2,
177 grid_size-border-1, grid_size-border-1);
180 XSetForeground(dpy, gc, fg);
181 for (i = 0; i <= bitmap_w; i += grid_size)
182 XFillRectangle (dpy, d, gc, xoff+i-half, yoff, border, bitmap_h);
183 for (i = 0; i <= bitmap_h; i += grid_size)
184 XFillRectangle (dpy, d, gc, xoff, yoff+i-half, bitmap_w, border);
189 XFillRectangle (dpy, d, gc, 0, 0, xoff, bitmap_h);
190 XFillRectangle (dpy, d, gc, bitmap_w - xoff, 0, xoff, bitmap_h);
194 XFillRectangle (dpy, d, gc, 0, 0, bitmap_w, yoff);
195 XFillRectangle (dpy, d, gc, 0, bitmap_h - yoff, bitmap_w, yoff);
199 if (delay2) usleep (delay2 * 2);
200 for (i = 0; i < grid_size; i += pix_inc)
203 points[0].x = xoff + grid_size * hole_x;
204 points[0].y = yoff + grid_size * hole_y;
205 points[1].x = points[0].x + grid_size;
206 points[1].y = points[0].y;
207 points[2].x = points[0].x;
208 points[2].y = points[0].y + i;
209 XFillPolygon (dpy, window, gc, points, 3, Convex, CoordModeOrigin);
211 points[1].x = points[0].x;
212 points[1].y = points[0].y + grid_size;
213 points[2].x = points[0].x + i;
214 points[2].y = points[0].y + grid_size;
215 XFillPolygon (dpy, window, gc, points, 3, Convex, CoordModeOrigin);
217 points[0].x = points[1].x + grid_size;
218 points[0].y = points[1].y;
219 points[2].x = points[0].x;
220 points[2].y = points[0].y - i;
221 XFillPolygon (dpy, window, gc, points, 3, Convex, CoordModeOrigin);
223 points[1].x = points[0].x;
224 points[1].y = points[0].y - grid_size;
225 points[2].x = points[1].x - i;
226 points[2].y = points[1].y;
227 XFillPolygon (dpy, window, gc, points, 3, Convex, CoordModeOrigin);
230 if (delay) usleep (delay);
233 XFillRectangle (dpy, window, gc,
234 xoff + grid_size * hole_x,
235 yoff + grid_size * hole_y,
236 grid_size, grid_size);
240 slide1 (Display *dpy, Window window)
242 /* this code is a total kludge, but who cares, it works... */
243 int i, x, y, ix, iy, dx, dy, dir, w, h, size, inc;
244 static int last = -1;
249 case 0: dx = 0, dy = 1; break;
250 case 1: dx = -1, dy = 0; break;
251 case 2: dx = 0, dy = -1; break;
252 case 3: dx = 1, dy = 0; break;
255 } while (dir == last ||
256 hole_x + dx < 0 || hole_x + dx >= grid_w ||
257 hole_y + dy < 0 || hole_y + dy >= grid_h);
258 if (grid_w > 1 && grid_h > 1)
259 last = (dir == 0 ? 2 : dir == 2 ? 0 : dir == 1 ? 3 : 1);
263 case 0: size = 1 + (random()%(grid_h - hole_y - 1)); h = size; w = 1; break;
264 case 1: size = 1 + (random()%hole_x); w = size; h = 1; break;
265 case 2: size = 1 + (random()%hole_y); h = size; w = 1; break;
266 case 3: size = 1 + (random()%(grid_w - hole_x - 1)); w = size; h = 1; break;
270 if (dx == -1) hole_x -= (size - 1);
271 else if (dy == -1) hole_y -= (size - 1);
273 ix = x = xoff + (hole_x + dx) * grid_size;
274 iy = y = yoff + (hole_y + dy) * grid_size;
276 for (i = 0; i < grid_size; i += inc)
278 int fx, fy, tox, toy;
279 if (inc + i > grid_size)
284 fx = (x < 0 ? 0 : x > max_width ? max_width : x);
285 fy = (y < 0 ? 0 : y > max_height ? max_height : y);
286 tox = (tox < 0 ? 0 : tox > max_width ? max_width : tox);
287 toy = (toy < 0 ? 0 : toy > max_height ? max_height : toy);
289 XCopyArea (dpy, window, window, gc,
291 grid_size * w, grid_size * h,
298 case 0: XFillRectangle (dpy, window, gc,
299 ix, y + grid_size * h, grid_size * w, iy - y);
301 case 1: XFillRectangle (dpy, window, gc, ix, iy, x - ix, grid_size * h);
303 case 2: XFillRectangle (dpy, window, gc, ix, iy, grid_size * w, y - iy);
305 case 3: XFillRectangle (dpy, window, gc,
306 x + grid_size * w, iy, ix - x, grid_size * h);
311 if (delay) usleep (delay);
315 case 0: hole_y += size; break;
316 case 1: hole_x--; break;
317 case 2: hole_y--; break;
318 case 3: hole_x += size; break;
323 char *progclass = "SlidePuzzle";
325 char *defaults [] = {
326 "*dontClearRoot: True",
328 #ifdef __sgi /* really, HAVE_READ_DISPLAY_EXTENSION */
332 ".background: Black",
335 "*pixelIncrement: 10",
336 "*internalBorderWidth: 4",
342 XrmOptionDescRec options [] = {
343 { "-grid-size", ".gridSize", XrmoptionSepArg, 0 },
344 { "-ibw", ".internalBorderWidth", XrmoptionSepArg, 0 },
345 { "-increment", ".pixelIncrement", XrmoptionSepArg, 0 },
346 { "-delay", ".delay", XrmoptionSepArg, 0 },
347 { "-delay2", ".delay2", XrmoptionSepArg, 0 },
352 screenhack (Display *dpy, Window window)
354 init_slide (dpy, window);
357 slide1 (dpy, window);
358 screenhack_handle_events (dpy);
359 if (delay2) usleep (delay2);