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);
41 XGetWindowAttributes (dpy, window, &xgwa); /* re-retrieve colormap */
44 max_width = xgwa.width;
45 max_height = xgwa.height;
47 delay = get_integer_resource ("delay", "Integer");
48 delay2 = get_integer_resource ("delay2", "Integer");
49 grid_size = get_integer_resource ("gridSize", "Integer");
50 pix_inc = get_integer_resource ("pixelIncrement", "Integer");
51 border = get_integer_resource ("internalBorderWidth", "InternalBorderWidth");
55 char *fgs = get_string_resource("background", "Background");
56 char *bgs = get_string_resource("foreground", "Foreground");
58 if (!XParseColor (dpy, cmap, fgs, &fgc))
59 XParseColor (dpy, cmap, "black", &bgc);
60 if (!XParseColor (dpy, cmap, bgs, &bgc))
61 XParseColor (dpy, cmap, "gray", &fgc);
63 fg_ok = XAllocColor (dpy, cmap, &fgc);
64 bg_ok = XAllocColor (dpy, cmap, &bgc);
66 /* If we weren't able to allocate the two colors we want from the
67 colormap (which is likely if the screen has been grabbed on an
68 8-bit SGI visual -- don't ask) then just go through the map
69 and find the closest color to the ones we wanted, and use those
70 pixels without actually allocating them.
84 unsigned long fgd = ~0;
85 unsigned long bgd = ~0;
86 int max = visual_cells (xgwa.screen, visual);
87 XColor *all = (XColor *) calloc(sizeof (*all), max);
88 for (i = 0; i < max; i++)
90 all[i].flags = DoRed|DoGreen|DoBlue;
93 XQueryColors (dpy, cmap, all, max);
94 for(i = 0; i < max; i++)
100 rd = (all[i].red >> 8) - (fgc.red >> 8);
101 gd = (all[i].green >> 8) - (fgc.green >> 8);
102 bd = (all[i].blue >> 8) - (fgc.blue >> 8);
103 if (rd < 0) rd = -rd;
104 if (gd < 0) gd = -gd;
105 if (bd < 0) bd = -bd;
106 d = (rd << 1) + (gd << 2) + bd;
118 rd = (all[i].red >> 8) - (bgc.red >> 8);
119 gd = (all[i].green >> 8) - (bgc.green >> 8);
120 bd = (all[i].blue >> 8) - (bgc.blue >> 8);
121 if (rd < 0) rd = -rd;
122 if (gd < 0) gd = -gd;
123 if (bd < 0) bd = -bd;
124 d = (rd << 1) + (gd << 2) + bd;
142 if (delay < 0) delay = 0;
143 if (delay2 < 0) delay2 = 0;
144 if (pix_inc < 1) pix_inc = 1;
145 if (grid_size < 1) grid_size = 1;
148 gcv.function = GXcopy;
149 gcv.subwindow_mode = IncludeInferiors;
150 gcflags = GCForeground |GCFunction;
151 if (use_subwindow_mode_p(xgwa.screen, window)) /* see grabscreen.c */
152 gcflags |= GCSubwindowMode;
153 gc = XCreateGC (dpy, window, gcflags, &gcv);
155 XGetWindowAttributes (dpy, window, &xgwa);
156 bitmap_w = xgwa.width;
157 bitmap_h = xgwa.height;
159 grid_w = bitmap_w / grid_size;
160 grid_h = bitmap_h / grid_size;
161 hole_x = random () % grid_w;
162 hole_y = random () % grid_h;
163 xoff = (bitmap_w - (grid_w * grid_size)) / 2;
164 yoff = (bitmap_h - (grid_h * grid_size)) / 2;
171 int half2 = (border & 1 ? half+1 : half);
172 XSetForeground(dpy, gc, bg);
173 for (i = 0; i < bitmap_w; i += grid_size)
176 for (j = 0; j < bitmap_h; j += grid_size)
177 XDrawRectangle (dpy, d, gc,
178 xoff+i+half2, yoff+j+half2,
179 grid_size-border-1, grid_size-border-1);
182 XSetForeground(dpy, gc, fg);
183 for (i = 0; i <= bitmap_w; i += grid_size)
184 XFillRectangle (dpy, d, gc, xoff+i-half, yoff, border, bitmap_h);
185 for (i = 0; i <= bitmap_h; i += grid_size)
186 XFillRectangle (dpy, d, gc, xoff, yoff+i-half, bitmap_w, border);
191 XFillRectangle (dpy, d, gc, 0, 0, xoff, bitmap_h);
192 XFillRectangle (dpy, d, gc, bitmap_w - xoff, 0, xoff, bitmap_h);
196 XFillRectangle (dpy, d, gc, 0, 0, bitmap_w, yoff);
197 XFillRectangle (dpy, d, gc, 0, bitmap_h - yoff, bitmap_w, yoff);
201 if (delay2) usleep (delay2 * 2);
202 for (i = 0; i < grid_size; i += pix_inc)
205 points[0].x = xoff + grid_size * hole_x;
206 points[0].y = yoff + grid_size * hole_y;
207 points[1].x = points[0].x + grid_size;
208 points[1].y = points[0].y;
209 points[2].x = points[0].x;
210 points[2].y = points[0].y + i;
211 XFillPolygon (dpy, window, gc, points, 3, Convex, CoordModeOrigin);
213 points[1].x = points[0].x;
214 points[1].y = points[0].y + grid_size;
215 points[2].x = points[0].x + i;
216 points[2].y = points[0].y + grid_size;
217 XFillPolygon (dpy, window, gc, points, 3, Convex, CoordModeOrigin);
219 points[0].x = points[1].x + grid_size;
220 points[0].y = points[1].y;
221 points[2].x = points[0].x;
222 points[2].y = points[0].y - i;
223 XFillPolygon (dpy, window, gc, points, 3, Convex, CoordModeOrigin);
225 points[1].x = points[0].x;
226 points[1].y = points[0].y - grid_size;
227 points[2].x = points[1].x - i;
228 points[2].y = points[1].y;
229 XFillPolygon (dpy, window, gc, points, 3, Convex, CoordModeOrigin);
232 if (delay) usleep (delay);
235 XFillRectangle (dpy, window, gc,
236 xoff + grid_size * hole_x,
237 yoff + grid_size * hole_y,
238 grid_size, grid_size);
242 slide1 (Display *dpy, Window window)
244 /* this code is a total kludge, but who cares, it works... */
245 int i, x, y, ix, iy, dx, dy, dir, w, h, size, inc;
246 static int last = -1;
251 case 0: dx = 0, dy = 1; break;
252 case 1: dx = -1, dy = 0; break;
253 case 2: dx = 0, dy = -1; break;
254 case 3: dx = 1, dy = 0; break;
257 } while (dir == last ||
258 hole_x + dx < 0 || hole_x + dx >= grid_w ||
259 hole_y + dy < 0 || hole_y + dy >= grid_h);
260 if (grid_w > 1 && grid_h > 1)
261 last = (dir == 0 ? 2 : dir == 2 ? 0 : dir == 1 ? 3 : 1);
265 case 0: size = 1 + (random()%(grid_h - hole_y - 1)); h = size; w = 1; break;
266 case 1: size = 1 + (random()%hole_x); w = size; h = 1; break;
267 case 2: size = 1 + (random()%hole_y); h = size; w = 1; break;
268 case 3: size = 1 + (random()%(grid_w - hole_x - 1)); w = size; h = 1; break;
272 if (dx == -1) hole_x -= (size - 1);
273 else if (dy == -1) hole_y -= (size - 1);
275 ix = x = xoff + (hole_x + dx) * grid_size;
276 iy = y = yoff + (hole_y + dy) * grid_size;
278 for (i = 0; i < grid_size; i += inc)
280 int fx, fy, tox, toy;
281 if (inc + i > grid_size)
286 fx = (x < 0 ? 0 : x > max_width ? max_width : x);
287 fy = (y < 0 ? 0 : y > max_height ? max_height : y);
288 tox = (tox < 0 ? 0 : tox > max_width ? max_width : tox);
289 toy = (toy < 0 ? 0 : toy > max_height ? max_height : toy);
291 XCopyArea (dpy, window, window, gc,
293 grid_size * w, grid_size * h,
300 case 0: XFillRectangle (dpy, window, gc,
301 ix, y + grid_size * h, grid_size * w, iy - y);
303 case 1: XFillRectangle (dpy, window, gc, ix, iy, x - ix, grid_size * h);
305 case 2: XFillRectangle (dpy, window, gc, ix, iy, grid_size * w, y - iy);
307 case 3: XFillRectangle (dpy, window, gc,
308 x + grid_size * w, iy, ix - x, grid_size * h);
313 if (delay) usleep (delay);
317 case 0: hole_y += size; break;
318 case 1: hole_x--; break;
319 case 2: hole_y--; break;
320 case 3: hole_x += size; break;
325 char *progclass = "SlidePuzzle";
327 char *defaults [] = {
328 "*dontClearRoot: True",
330 #ifdef __sgi /* really, HAVE_READ_DISPLAY_EXTENSION */
334 ".background: Black",
337 "*pixelIncrement: 10",
338 "*internalBorderWidth: 4",
344 XrmOptionDescRec options [] = {
345 { "-grid-size", ".gridSize", XrmoptionSepArg, 0 },
346 { "-ibw", ".internalBorderWidth", XrmoptionSepArg, 0 },
347 { "-increment", ".pixelIncrement", XrmoptionSepArg, 0 },
348 { "-delay", ".delay", XrmoptionSepArg, 0 },
349 { "-delay2", ".delay2", XrmoptionSepArg, 0 },
354 screenhack (Display *dpy, Window window)
356 init_slide (dpy, window);
359 slide1 (dpy, window);
360 screenhack_handle_events (dpy);
361 if (delay2) usleep (delay2);