1 /* xscreensaver, Copyright (c) 1992-2018 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;
55 XGetWindowAttributes (st->dpy, st->window, &xgwa);
56 st->img_loader = load_image_async_simple (0, xgwa.screen, st->window,
58 st->start_time = time ((time_t *) 0);
60 st->max_width = xgwa.width;
61 st->max_height = xgwa.height;
63 st->delay = get_integer_resource (st->dpy, "delay", "Integer");
64 st->delay2 = get_integer_resource (st->dpy, "delay2", "Integer");
65 st->duration = get_integer_resource (st->dpy, "duration", "Seconds");
66 st->grid_size = get_integer_resource (st->dpy, "gridSize", "Integer");
67 st->pix_inc = get_integer_resource (st->dpy, "pixelIncrement", "Integer");
69 if (xgwa.width > 2560) st->grid_size *= 2; /* Retina displays */
72 /* Don't let the grid be smaller than 5x5 */
73 while (st->grid_size > xgwa.width / 5)
75 while (st->grid_size > xgwa.height / 5)
78 if (st->delay < 0) st->delay = 0;
79 if (st->delay2 < 0) st->delay2 = 0;
80 if (st->duration < 1) st->duration = 1;
81 if (st->pix_inc < 1) st->pix_inc = 1;
82 if (st->grid_size < 1) st->grid_size = 1;
87 char *fgs = get_string_resource(st->dpy, "background", "Background");
88 char *bgs = get_string_resource(st->dpy, "foreground", "Foreground");
90 if (!XParseColor (st->dpy, xgwa.colormap, fgs, &fgc))
91 XParseColor (st->dpy, xgwa.colormap, "black", &bgc);
92 if (!XParseColor (st->dpy, xgwa.colormap, bgs, &bgc))
93 XParseColor (st->dpy, xgwa.colormap, "gray", &fgc);
95 fg_ok = XAllocColor (st->dpy, xgwa.colormap, &fgc);
96 bg_ok = XAllocColor (st->dpy, xgwa.colormap, &bgc);
98 /* If we weren't able to allocate the two colors we want from the
99 colormap (which is likely if the screen has been grabbed on an
100 8-bit SGI visual -- don't ask) then just go through the map
101 and find the closest color to the ones we wanted, and use those
102 pixels without actually allocating them.
118 unsigned long fgd = ~0;
119 unsigned long bgd = ~0;
120 int max = visual_cells (xgwa.screen, xgwa.visual);
121 XColor *all = (XColor *) calloc(sizeof (*all), max);
122 for (i = 0; i < max; i++)
124 all[i].flags = DoRed|DoGreen|DoBlue;
127 XQueryColors (st->dpy, xgwa.colormap, all, max);
128 for(i = 0; i < max; i++)
134 rd = (all[i].red >> 8) - (fgc.red >> 8);
135 gd = (all[i].green >> 8) - (fgc.green >> 8);
136 bd = (all[i].blue >> 8) - (fgc.blue >> 8);
137 if (rd < 0) rd = -rd;
138 if (gd < 0) gd = -gd;
139 if (bd < 0) bd = -bd;
140 dd = (rd << 1) + (gd << 2) + bd;
144 st->fg = all[i].pixel;
152 rd = (all[i].red >> 8) - (bgc.red >> 8);
153 gd = (all[i].green >> 8) - (bgc.green >> 8);
154 bd = (all[i].blue >> 8) - (bgc.blue >> 8);
155 if (rd < 0) rd = -rd;
156 if (gd < 0) gd = -gd;
157 if (bd < 0) bd = -bd;
158 dd = (rd << 1) + (gd << 2) + bd;
162 st->bg = all[i].pixel;
173 #endif /* !HAVE_JWXYZ */
176 gcv.foreground = st->fg;
177 gcv.function = GXcopy;
178 gcv.subwindow_mode = IncludeInferiors;
179 gcflags = GCForeground |GCFunction;
180 if (use_subwindow_mode_p(xgwa.screen, st->window)) /* see grabscreen.c */
181 gcflags |= GCSubwindowMode;
182 st->gc = XCreateGC (st->dpy, st->window, gcflags, &gcv);
188 draw_grid (struct state *st)
193 XWindowAttributes xgwa;
195 XGetWindowAttributes (st->dpy, st->window, &xgwa);
197 border = get_integer_resource (st->dpy, "internalBorderWidth",
198 "InternalBorderWidth");
200 XGetWindowAttributes (st->dpy, st->window, &xgwa);
201 st->bitmap_w = xgwa.width;
202 st->bitmap_h = xgwa.height;
204 if (xgwa.width < 50 || xgwa.height < 50) /* tiny window */
206 int s = (xgwa.width < xgwa.height ? xgwa.width : xgwa.height);
208 st->grid_size = s / 2;
209 if (st->grid_size < 16) st->grid_size = 16;
210 if (st->bitmap_w < st->grid_size*2) st->bitmap_w = st->grid_size*2;
211 if (st->bitmap_h < st->grid_size*2) st->bitmap_h = st->grid_size*2;
214 if (xgwa.width > 2560) border *= 2; /* Retina displays */
216 st->grid_w = st->bitmap_w / st->grid_size;
217 st->grid_h = st->bitmap_h / st->grid_size;
218 st->hole_x = random () % st->grid_w;
219 st->hole_y = random () % st->grid_h;
220 st->xoff = (st->bitmap_w - (st->grid_w * st->grid_size)) / 2;
221 st->yoff = (st->bitmap_h - (st->grid_h * st->grid_size)) / 2;
231 int half2 = (border & 1 ? half+1 : half);
232 XSetForeground(st->dpy, st->gc, st->bg);
233 for (i = 0; i < st->bitmap_w; i += st->grid_size)
236 for (j = 0; j < st->bitmap_h; j += st->grid_size)
237 XDrawRectangle (st->dpy, d, st->gc,
238 st->xoff+i+half2, st->yoff+j+half2,
239 st->grid_size-border-1, st->grid_size-border-1);
242 XSetForeground(st->dpy, st->gc, st->fg);
243 for (i = 0; i <= st->bitmap_w; i += st->grid_size)
244 XFillRectangle (st->dpy, d, st->gc, st->xoff+i-half, st->yoff, border, st->bitmap_h);
245 for (i = 0; i <= st->bitmap_h; i += st->grid_size)
246 XFillRectangle (st->dpy, d, st->gc, st->xoff, st->yoff+i-half, st->bitmap_w, border);
251 XFillRectangle (st->dpy, d, st->gc, 0, 0, st->xoff, st->bitmap_h);
252 XFillRectangle (st->dpy, d, st->gc, st->bitmap_w - st->xoff, 0, st->xoff, st->bitmap_h);
256 XFillRectangle (st->dpy, d, st->gc, 0, 0, st->bitmap_w, st->yoff);
257 XFillRectangle (st->dpy, d, st->gc, 0, st->bitmap_h - st->yoff, st->bitmap_w, st->yoff);
263 slidescreen_draw_early (struct state *st)
265 while (st->early_i < 0)
271 /* for (early_i = 0; early_i < grid_size; early_i += pix_inc) */
274 points[0].x = st->xoff + st->grid_size * st->hole_x;
275 points[0].y = st->yoff + st->grid_size * st->hole_y;
276 points[1].x = points[0].x + st->grid_size;
277 points[1].y = points[0].y;
278 points[2].x = points[0].x;
279 points[2].y = points[0].y + st->early_i;
280 XFillPolygon (st->dpy, st->window, st->gc, points, 3, Convex, CoordModeOrigin);
282 points[1].x = points[0].x;
283 points[1].y = points[0].y + st->grid_size;
284 points[2].x = points[0].x + st->early_i;
285 points[2].y = points[0].y + st->grid_size;
286 XFillPolygon (st->dpy, st->window, st->gc, points, 3, Convex, CoordModeOrigin);
288 points[0].x = points[1].x + st->grid_size;
289 points[0].y = points[1].y;
290 points[2].x = points[0].x;
291 points[2].y = points[0].y - st->early_i;
292 XFillPolygon (st->dpy, st->window, st->gc, points, 3, Convex, CoordModeOrigin);
294 points[1].x = points[0].x;
295 points[1].y = points[0].y - st->grid_size;
296 points[2].x = points[1].x - st->early_i;
297 points[2].y = points[1].y;
298 XFillPolygon (st->dpy, st->window, st->gc, points, 3, Convex, CoordModeOrigin);
301 st->early_i += st->pix_inc;
302 if (st->early_i < st->grid_size)
305 XFillRectangle (st->dpy, st->window, st->gc,
306 st->xoff + st->grid_size * st->hole_x,
307 st->yoff + st->grid_size * st->hole_y,
308 st->grid_size, st->grid_size);
314 slidescreen_draw (Display *dpy, Window window, void *closure)
316 struct state *st = (struct state *) closure;
317 int this_delay = st->delay;
319 /* this code is a total kludge, but who cares, it works... */
321 if (st->img_loader) /* still loading */
323 st->img_loader = load_image_async_simple (st->img_loader, 0, 0, 0, 0, 0);
324 if (! st->img_loader) { /* just finished */
325 st->start_time = time ((time_t *) 0);
331 if (!st->img_loader &&
332 st->start_time + st->duration < time ((time_t *) 0)) {
333 XWindowAttributes xgwa;
334 XGetWindowAttributes(st->dpy, st->window, &xgwa);
335 st->img_loader = load_image_async_simple (0, xgwa.screen, st->window,
337 st->start_time = time ((time_t *) 0);
338 st->draw_initted = 0;
342 if (! st->draw_initted)
344 if (!slidescreen_draw_early (st))
346 st->draw_initted = 1;
355 if (st->draw_last == -1) st->draw_last = random () % 2;
357 /* alternate between horizontal and vertical slides */
358 /* note that draw_dir specifies the direction the _hole_ moves, not the tiles */
359 if (st->draw_last == VERTICAL) {
360 if (((st->grid_w > 1) ? st->draw_rnd = random () % (st->grid_w - 1) : 0)
362 st->draw_dx = -1; st->draw_dir = LEFT; st->hole_x -= st->draw_rnd;
364 st->draw_dx = 1; st->draw_dir = RIGHT; st->draw_rnd -= st->hole_x;
366 st->draw_dy = 0; st->draw_w = st->draw_size = st->draw_rnd + 1; st->draw_h = 1;
367 st->draw_last = HORIZONTAL;
369 if (((st->grid_h > 1) ? st->draw_rnd = random () % (st->grid_h - 1) : 0)
371 st->draw_dy = -1; st->draw_dir = UP; st->hole_y -= st->draw_rnd;
373 st->draw_dy = 1; st->draw_dir = DOWN; st->draw_rnd -= st->hole_y;
375 st->draw_dx = 0; st->draw_h = st->draw_size = st->draw_rnd + 1; st->draw_w = 1;
376 st->draw_last = VERTICAL;
379 st->draw_ix = st->draw_x = st->xoff + (st->hole_x + st->draw_dx) * st->grid_size;
380 st->draw_iy = st->draw_y = st->yoff + (st->hole_y + st->draw_dy) * st->grid_size;
381 st->draw_inc = st->pix_inc;
385 /* for (draw_i = 0; draw_i < grid_size; draw_i += draw_inc) */
387 int fx, fy, tox, toy;
388 if (st->draw_inc + st->draw_i > st->grid_size)
389 st->draw_inc = st->grid_size - st->draw_i;
390 tox = st->draw_x - st->draw_dx * st->draw_inc;
391 toy = st->draw_y - st->draw_dy * st->draw_inc;
393 fx = (st->draw_x < 0 ? 0 : st->draw_x > st->max_width ? st->max_width : st->draw_x);
394 fy = (st->draw_y < 0 ? 0 : st->draw_y > st->max_height ? st->max_height : st->draw_y);
395 tox = (tox < 0 ? 0 : tox > st->max_width ? st->max_width : tox);
396 toy = (toy < 0 ? 0 : toy > st->max_height ? st->max_height : toy);
398 XCopyArea (st->dpy, st->window, st->window, st->gc,
400 st->grid_size * st->draw_w, st->grid_size * st->draw_h,
403 st->draw_x -= st->draw_dx * st->draw_inc;
404 st->draw_y -= st->draw_dy * st->draw_inc;
405 switch (st->draw_dir)
407 case DOWN: XFillRectangle (st->dpy, st->window, st->gc,
408 st->draw_ix, st->draw_y + st->grid_size * st->draw_h, st->grid_size * st->draw_w, st->draw_iy - st->draw_y);
410 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);
412 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);
414 case RIGHT: XFillRectangle (st->dpy, st->window, st->gc,
415 st->draw_x + st->grid_size * st->draw_w, st->draw_iy, st->draw_ix - st->draw_x, st->grid_size * st->draw_h);
420 st->draw_i += st->draw_inc;
421 if (st->draw_i >= st->grid_size)
425 switch (st->draw_dir)
427 case DOWN: st->hole_y += st->draw_size; break;
428 case LEFT: st->hole_x--; break;
429 case UP: st->hole_y--; break;
430 case RIGHT: st->hole_x += st->draw_size; break;
433 this_delay = st->delay2;
440 slidescreen_reshape (Display *dpy, Window window, void *closure,
441 unsigned int w, unsigned int h)
443 struct state *st = (struct state *) closure;
446 if (! st->img_loader) {
447 XWindowAttributes xgwa;
448 XGetWindowAttributes (st->dpy, st->window, &xgwa);
449 st->img_loader = load_image_async_simple (0, xgwa.screen, st->window,
451 st->start_time = time ((time_t *) 0);
456 slidescreen_event (Display *dpy, Window window, void *closure, XEvent *event)
458 struct state *st = (struct state *) closure;
459 if (screenhack_event_helper (dpy, window, event))
468 slidescreen_free (Display *dpy, Window window, void *closure)
470 struct state *st = (struct state *) closure;
471 XFreeGC (dpy, st->gc);
477 static const char *slidescreen_defaults [] = {
478 "*dontClearRoot: True",
481 #ifdef __sgi /* really, HAVE_READ_DISPLAY_EXTENSION */
485 ".background: Black",
486 ".foreground: #BEBEBE",
488 "*pixelIncrement: 10",
489 "*internalBorderWidth: 4",
494 "*ignoreRotation: True",
495 "*rotateImages: True",
500 static XrmOptionDescRec slidescreen_options [] = {
501 { "-grid-size", ".gridSize", XrmoptionSepArg, 0 },
502 { "-ibw", ".internalBorderWidth", XrmoptionSepArg, 0 },
503 { "-increment", ".pixelIncrement", XrmoptionSepArg, 0 },
504 { "-delay", ".delay", XrmoptionSepArg, 0 },
505 { "-delay2", ".delay2", XrmoptionSepArg, 0 },
506 {"-duration", ".duration", XrmoptionSepArg, 0 },
510 XSCREENSAVER_MODULE ("SlideScreen", slidescreen)