1 /* xscreensaver, Copyright (c) 1992-2008 Jamie Zawinski <jwz@jwz.org>
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
12 #include "screenhack.h"
14 enum { DOWN = 0, LEFT, UP, RIGHT };
15 enum { VERTICAL, HORIZONTAL };
24 int bitmap_w, bitmap_h;
31 int max_width, max_height;
35 int draw_x, draw_y, draw_ix, draw_iy, draw_dx, draw_dy;
36 int draw_dir, draw_w, draw_h, draw_size, draw_inc;
41 async_load_state *img_loader;
46 slidescreen_init (Display *dpy, Window window)
48 struct state *st = (struct state *) calloc (1, sizeof(*st));
49 XWindowAttributes xgwa;
56 XGetWindowAttributes (st->dpy, st->window, &xgwa);
57 st->img_loader = load_image_async_simple (0, xgwa.screen, st->window,
59 st->start_time = time ((time_t) 0);
62 st->max_width = xgwa.width;
63 st->max_height = xgwa.height;
65 st->delay = get_integer_resource (st->dpy, "delay", "Integer");
66 st->delay2 = get_integer_resource (st->dpy, "delay2", "Integer");
67 st->duration = get_integer_resource (st->dpy, "duration", "Seconds");
68 st->grid_size = get_integer_resource (st->dpy, "gridSize", "Integer");
69 st->pix_inc = get_integer_resource (st->dpy, "pixelIncrement", "Integer");
71 /* Don't let the grid be smaller than 5x5 */
72 while (st->grid_size > xgwa.width / 5)
74 while (st->grid_size > xgwa.height / 5)
77 if (st->delay < 0) st->delay = 0;
78 if (st->delay2 < 0) st->delay2 = 0;
79 if (st->duration < 1) st->duration = 1;
80 if (st->pix_inc < 1) st->pix_inc = 1;
81 if (st->grid_size < 1) st->grid_size = 1;
86 char *fgs = get_string_resource(st->dpy, "background", "Background");
87 char *bgs = get_string_resource(st->dpy, "foreground", "Foreground");
89 if (!XParseColor (st->dpy, xgwa.colormap, fgs, &fgc))
90 XParseColor (st->dpy, xgwa.colormap, "black", &bgc);
91 if (!XParseColor (st->dpy, xgwa.colormap, bgs, &bgc))
92 XParseColor (st->dpy, xgwa.colormap, "gray", &fgc);
94 fg_ok = XAllocColor (st->dpy, xgwa.colormap, &fgc);
95 bg_ok = XAllocColor (st->dpy, xgwa.colormap, &bgc);
97 /* If we weren't able to allocate the two colors we want from the
98 colormap (which is likely if the screen has been grabbed on an
99 8-bit SGI visual -- don't ask) then just go through the map
100 and find the closest color to the ones we wanted, and use those
101 pixels without actually allocating them.
117 unsigned long fgd = ~0;
118 unsigned long bgd = ~0;
119 int max = visual_cells (xgwa.screen, xgwa.visual);
120 XColor *all = (XColor *) calloc(sizeof (*all), max);
121 for (i = 0; i < max; i++)
123 all[i].flags = DoRed|DoGreen|DoBlue;
126 XQueryColors (st->dpy, xgwa.colormap, all, max);
127 for(i = 0; i < max; i++)
133 rd = (all[i].red >> 8) - (fgc.red >> 8);
134 gd = (all[i].green >> 8) - (fgc.green >> 8);
135 bd = (all[i].blue >> 8) - (fgc.blue >> 8);
136 if (rd < 0) rd = -rd;
137 if (gd < 0) gd = -gd;
138 if (bd < 0) bd = -bd;
139 dd = (rd << 1) + (gd << 2) + bd;
143 st->fg = all[i].pixel;
151 rd = (all[i].red >> 8) - (bgc.red >> 8);
152 gd = (all[i].green >> 8) - (bgc.green >> 8);
153 bd = (all[i].blue >> 8) - (bgc.blue >> 8);
154 if (rd < 0) rd = -rd;
155 if (gd < 0) gd = -gd;
156 if (bd < 0) bd = -bd;
157 dd = (rd << 1) + (gd << 2) + bd;
161 st->bg = all[i].pixel;
172 #endif /* !HAVE_COCOA */
175 gcv.foreground = st->fg;
176 gcv.function = GXcopy;
177 gcv.subwindow_mode = IncludeInferiors;
178 gcflags = GCForeground |GCFunction;
179 if (use_subwindow_mode_p(xgwa.screen, st->window)) /* see grabscreen.c */
180 gcflags |= GCSubwindowMode;
181 st->gc = XCreateGC (st->dpy, st->window, gcflags, &gcv);
187 draw_grid (struct state *st)
192 XWindowAttributes xgwa;
194 XGetWindowAttributes (st->dpy, st->window, &xgwa);
196 border = get_integer_resource (st->dpy, "internalBorderWidth",
197 "InternalBorderWidth");
199 XGetWindowAttributes (st->dpy, st->window, &xgwa);
200 st->bitmap_w = xgwa.width;
201 st->bitmap_h = xgwa.height;
203 st->grid_w = st->bitmap_w / st->grid_size;
204 st->grid_h = st->bitmap_h / st->grid_size;
205 st->hole_x = random () % st->grid_w;
206 st->hole_y = random () % st->grid_h;
207 st->xoff = (st->bitmap_w - (st->grid_w * st->grid_size)) / 2;
208 st->yoff = (st->bitmap_h - (st->grid_h * st->grid_size)) / 2;
218 int half2 = (border & 1 ? half+1 : half);
219 XSetForeground(st->dpy, st->gc, st->bg);
220 for (i = 0; i < st->bitmap_w; i += st->grid_size)
223 for (j = 0; j < st->bitmap_h; j += st->grid_size)
224 XDrawRectangle (st->dpy, d, st->gc,
225 st->xoff+i+half2, st->yoff+j+half2,
226 st->grid_size-border-1, st->grid_size-border-1);
229 XSetForeground(st->dpy, st->gc, st->fg);
230 for (i = 0; i <= st->bitmap_w; i += st->grid_size)
231 XFillRectangle (st->dpy, d, st->gc, st->xoff+i-half, st->yoff, border, st->bitmap_h);
232 for (i = 0; i <= st->bitmap_h; i += st->grid_size)
233 XFillRectangle (st->dpy, d, st->gc, st->xoff, st->yoff+i-half, st->bitmap_w, border);
238 XFillRectangle (st->dpy, d, st->gc, 0, 0, st->xoff, st->bitmap_h);
239 XFillRectangle (st->dpy, d, st->gc, st->bitmap_w - st->xoff, 0, st->xoff, st->bitmap_h);
243 XFillRectangle (st->dpy, d, st->gc, 0, 0, st->bitmap_w, st->yoff);
244 XFillRectangle (st->dpy, d, st->gc, 0, st->bitmap_h - st->yoff, st->bitmap_w, st->yoff);
250 slidescreen_draw_early (struct state *st)
252 while (st->early_i < 0)
258 /* for (early_i = 0; early_i < grid_size; early_i += pix_inc) */
261 points[0].x = st->xoff + st->grid_size * st->hole_x;
262 points[0].y = st->yoff + st->grid_size * st->hole_y;
263 points[1].x = points[0].x + st->grid_size;
264 points[1].y = points[0].y;
265 points[2].x = points[0].x;
266 points[2].y = points[0].y + st->early_i;
267 XFillPolygon (st->dpy, st->window, st->gc, points, 3, Convex, CoordModeOrigin);
269 points[1].x = points[0].x;
270 points[1].y = points[0].y + st->grid_size;
271 points[2].x = points[0].x + st->early_i;
272 points[2].y = points[0].y + st->grid_size;
273 XFillPolygon (st->dpy, st->window, st->gc, points, 3, Convex, CoordModeOrigin);
275 points[0].x = points[1].x + st->grid_size;
276 points[0].y = points[1].y;
277 points[2].x = points[0].x;
278 points[2].y = points[0].y - st->early_i;
279 XFillPolygon (st->dpy, st->window, st->gc, points, 3, Convex, CoordModeOrigin);
281 points[1].x = points[0].x;
282 points[1].y = points[0].y - st->grid_size;
283 points[2].x = points[1].x - st->early_i;
284 points[2].y = points[1].y;
285 XFillPolygon (st->dpy, st->window, st->gc, points, 3, Convex, CoordModeOrigin);
288 st->early_i += st->pix_inc;
289 if (st->early_i < st->grid_size)
292 XFillRectangle (st->dpy, st->window, st->gc,
293 st->xoff + st->grid_size * st->hole_x,
294 st->yoff + st->grid_size * st->hole_y,
295 st->grid_size, st->grid_size);
301 slidescreen_draw (Display *dpy, Window window, void *closure)
303 struct state *st = (struct state *) closure;
304 int this_delay = st->delay;
306 /* this code is a total kludge, but who cares, it works... */
308 if (st->img_loader) /* still loading */
310 st->img_loader = load_image_async_simple (st->img_loader, 0, 0, 0, 0, 0);
311 if (! st->img_loader) { /* just finished */
312 st->start_time = time ((time_t) 0);
318 if (!st->img_loader &&
319 st->start_time + st->duration < time ((time_t) 0)) {
320 XWindowAttributes xgwa;
321 XGetWindowAttributes(st->dpy, st->window, &xgwa);
322 st->img_loader = load_image_async_simple (0, xgwa.screen, st->window,
324 st->start_time = time ((time_t) 0);
325 st->draw_initted = 0;
329 if (! st->draw_initted)
331 if (!slidescreen_draw_early (st))
333 st->draw_initted = 1;
342 if (st->draw_last == -1) st->draw_last = random () % 2;
344 /* alternate between horizontal and vertical slides */
345 /* note that draw_dir specifies the direction the _hole_ moves, not the tiles */
346 if (st->draw_last == VERTICAL) {
347 if (((st->grid_w > 1) ? st->draw_rnd = random () % (st->grid_w - 1) : 0)
349 st->draw_dx = -1; st->draw_dir = LEFT; st->hole_x -= st->draw_rnd;
351 st->draw_dx = 1; st->draw_dir = RIGHT; st->draw_rnd -= st->hole_x;
353 st->draw_dy = 0; st->draw_w = st->draw_size = st->draw_rnd + 1; st->draw_h = 1;
354 st->draw_last = HORIZONTAL;
356 if (((st->grid_h > 1) ? st->draw_rnd = random () % (st->grid_h - 1) : 0)
358 st->draw_dy = -1; st->draw_dir = UP; st->hole_y -= st->draw_rnd;
360 st->draw_dy = 1; st->draw_dir = DOWN; st->draw_rnd -= st->hole_y;
362 st->draw_dx = 0; st->draw_h = st->draw_size = st->draw_rnd + 1; st->draw_w = 1;
363 st->draw_last = VERTICAL;
366 st->draw_ix = st->draw_x = st->xoff + (st->hole_x + st->draw_dx) * st->grid_size;
367 st->draw_iy = st->draw_y = st->yoff + (st->hole_y + st->draw_dy) * st->grid_size;
368 st->draw_inc = st->pix_inc;
372 /* for (draw_i = 0; draw_i < grid_size; draw_i += draw_inc) */
374 int fx, fy, tox, toy;
375 if (st->draw_inc + st->draw_i > st->grid_size)
376 st->draw_inc = st->grid_size - st->draw_i;
377 tox = st->draw_x - st->draw_dx * st->draw_inc;
378 toy = st->draw_y - st->draw_dy * st->draw_inc;
380 fx = (st->draw_x < 0 ? 0 : st->draw_x > st->max_width ? st->max_width : st->draw_x);
381 fy = (st->draw_y < 0 ? 0 : st->draw_y > st->max_height ? st->max_height : st->draw_y);
382 tox = (tox < 0 ? 0 : tox > st->max_width ? st->max_width : tox);
383 toy = (toy < 0 ? 0 : toy > st->max_height ? st->max_height : toy);
385 XCopyArea (st->dpy, st->window, st->window, st->gc,
387 st->grid_size * st->draw_w, st->grid_size * st->draw_h,
390 st->draw_x -= st->draw_dx * st->draw_inc;
391 st->draw_y -= st->draw_dy * st->draw_inc;
392 switch (st->draw_dir)
394 case DOWN: XFillRectangle (st->dpy, st->window, st->gc,
395 st->draw_ix, st->draw_y + st->grid_size * st->draw_h, st->grid_size * st->draw_w, st->draw_iy - st->draw_y);
397 case LEFT: XFillRectangle (st->dpy, st->window, st->gc, st->draw_ix, st->draw_iy, st->draw_x - st->draw_ix, st->grid_size * st->draw_h);
399 case UP: XFillRectangle (st->dpy, st->window, st->gc, st->draw_ix, st->draw_iy, st->grid_size * st->draw_w, st->draw_y - st->draw_iy);
401 case RIGHT: XFillRectangle (st->dpy, st->window, st->gc,
402 st->draw_x + st->grid_size * st->draw_w, st->draw_iy, st->draw_ix - st->draw_x, st->grid_size * st->draw_h);
407 st->draw_i += st->draw_inc;
408 if (st->draw_i >= st->grid_size)
412 switch (st->draw_dir)
414 case DOWN: st->hole_y += st->draw_size; break;
415 case LEFT: st->hole_x--; break;
416 case UP: st->hole_y--; break;
417 case RIGHT: st->hole_x += st->draw_size; break;
420 this_delay = st->delay2;
427 slidescreen_reshape (Display *dpy, Window window, void *closure,
428 unsigned int w, unsigned int h)
433 slidescreen_event (Display *dpy, Window window, void *closure, XEvent *event)
439 slidescreen_free (Display *dpy, Window window, void *closure)
441 struct state *st = (struct state *) closure;
442 XFreeGC (dpy, st->gc);
448 static const char *slidescreen_defaults [] = {
449 "*dontClearRoot: True",
452 #ifdef __sgi /* really, HAVE_READ_DISPLAY_EXTENSION */
456 ".background: Black",
457 ".foreground: #BEBEBE",
459 "*pixelIncrement: 10",
460 "*internalBorderWidth: 4",
467 static XrmOptionDescRec slidescreen_options [] = {
468 { "-grid-size", ".gridSize", XrmoptionSepArg, 0 },
469 { "-ibw", ".internalBorderWidth", XrmoptionSepArg, 0 },
470 { "-increment", ".pixelIncrement", XrmoptionSepArg, 0 },
471 { "-delay", ".delay", XrmoptionSepArg, 0 },
472 { "-delay2", ".delay2", XrmoptionSepArg, 0 },
473 {"-duration", ".duration", XrmoptionSepArg, 0 },
477 XSCREENSAVER_MODULE ("SlideScreen", slidescreen)