+++ /dev/null
-/* xscreensaver, Copyright (c) 1999 Jamie Zawinski <jwz@jwz.org>
- *
- * Permission to use, copy, modify, distribute, and sell this software and its
- * documentation for any purpose is hereby granted without fee, provided that
- * the above copyright notice appear in all copies and that both that
- * copyright notice and this permission notice appear in supporting
- * documentation. No representations are made about the suitability of this
- * software for any purpose. It is provided "as is" without express or
- * implied warranty.
- */
-
-#include <math.h>
-#include "screenhack.h"
-
-#ifdef HAVE_DOUBLE_BUFFER_EXTENSION
-# include "xdbe.h"
-#endif /* HAVE_DOUBLE_BUFFER_EXTENSION */
-
-#define countof(x) (sizeof(x)/sizeof(*(x)))
-#define ABS(x) ((x)<0?-(x):(x))
-
-struct throbber {
- int x, y;
- int size;
- int max_size;
- int thickness;
- int speed;
- int fuse;
- GC gc;
- void (*draw) (Display *, Drawable, struct throbber *);
-};
-
-static void
-draw_star (Display *dpy, Drawable w, struct throbber *t)
-{
- XPoint points[11];
- int x = t->x;
- int y = t->y;
- int s = t->size / 0.383; /* trial and error, I forget how to derive this */
- int s2 = t->size;
- double c = M_PI * 2;
- double o = -M_PI / 2;
-
- points[0].x = x + s * cos(o + 0.0*c); points[0].y = y + s * sin(o + 0.0*c);
- points[1].x = x + s2 * cos(o + 0.1*c); points[1].y = y + s2 * sin(o + 0.1*c);
- points[2].x = x + s * cos(o + 0.2*c); points[2].y = y + s * sin(o + 0.2*c);
- points[3].x = x + s2 * cos(o + 0.3*c); points[3].y = y + s2 * sin(o + 0.3*c);
- points[4].x = x + s * cos(o + 0.4*c); points[4].y = y + s * sin(o + 0.4*c);
- points[5].x = x + s2 * cos(o + 0.5*c); points[5].y = y + s2 * sin(o + 0.5*c);
- points[6].x = x + s * cos(o + 0.6*c); points[6].y = y + s * sin(o + 0.6*c);
- points[7].x = x + s2 * cos(o + 0.7*c); points[7].y = y + s2 * sin(o + 0.7*c);
- points[8].x = x + s * cos(o + 0.8*c); points[8].y = y + s * sin(o + 0.8*c);
- points[9].x = x + s2 * cos(o + 0.9*c); points[9].y = y + s2 * sin(o + 0.9*c);
- points[10] = points[0];
-
- XDrawLines (dpy, w, t->gc, points, countof(points), CoordModeOrigin);
-}
-
-static void
-draw_circle (Display *dpy, Drawable w, struct throbber *t)
-{
- XDrawArc (dpy, w, t->gc,
- t->x - t->size / 2,
- t->y - t->size / 2,
- t->size, t->size,
- 0, 360*64);
-}
-
-static void
-draw_hlines (Display *dpy, Drawable w, struct throbber *t)
-{
- XDrawLine (dpy, w, t->gc, 0,
- t->y - t->size, t->max_size,
- t->y - t->size);
- XDrawLine (dpy, w, t->gc, 0,
- t->y + t->size, t->max_size,
- t->y + t->size);
-}
-
-static void
-draw_vlines (Display *dpy, Drawable w, struct throbber *t)
-{
- XDrawLine (dpy, w, t->gc,
- t->x - t->size, 0,
- t->x - t->size, t->max_size);
- XDrawLine (dpy, w, t->gc,
- t->x + t->size, 0,
- t->x + t->size, t->max_size);
-}
-
-static void
-draw_corners (Display *dpy, Drawable w, struct throbber *t)
-{
- int s = (t->size + t->thickness) / 2;
- XPoint points[3];
-
- points[0].x = 0; points[0].y = t->y - s;
- points[1].x = t->x - s; points[1].y = t->y - s;
- points[2].x = t->x - s; points[2].y = 0;
- XDrawLines (dpy, w, t->gc, points, countof(points), CoordModeOrigin);
-
- points[0].x = 0; points[0].y = t->y + s;
- points[1].x = t->x - s; points[1].y = t->y + s;
- points[2].x = t->x - s; points[2].y = t->max_size;
- XDrawLines (dpy, w, t->gc, points, countof(points), CoordModeOrigin);
-
- points[0].x = t->x + s; points[0].y = 0;
- points[1].x = t->x + s; points[1].y = t->y - s;
- points[2].x = t->max_size; points[2].y = t->y - s;
- XDrawLines (dpy, w, t->gc, points, countof(points), CoordModeOrigin);
-
- points[0].x = t->x + s; points[0].y = t->max_size;
- points[1].x = t->x + s; points[1].y = t->y + s;
- points[2].x = t->max_size; points[2].y = t->y + s;
- XDrawLines (dpy, w, t->gc, points, countof(points), CoordModeOrigin);
-}
-
-
-static struct throbber *
-make_throbber (Display *dpy, Drawable d, int w, int h, unsigned long pixel)
-{
- XGCValues gcv;
- struct throbber *t = (struct throbber *) malloc (sizeof (*t));
- t->x = w / 2;
- t->y = h / 2;
- t->max_size = w;
- t->speed = get_integer_resource ("speed", "Speed");
- t->fuse = 1 + (random() % 4);
- t->thickness = get_integer_resource ("thickness", "Thickness");
-
- if (t->speed < 0) t->speed = -t->speed;
- t->speed += (((random() % t->speed) / 2) - (t->speed / 2));
- if (t->speed > 0) t->speed = -t->speed;
-
- if (random() % 4)
- t->size = t->max_size;
- else
- t->size = t->thickness, t->speed = -t->speed;
-
- gcv.foreground = pixel;
- gcv.line_width = t->thickness;
- gcv.line_style = LineSolid;
- gcv.cap_style = CapProjecting;
- gcv.join_style = JoinMiter;
- t->gc = XCreateGC (dpy, d,
- (GCForeground|GCLineWidth|GCLineStyle|
- GCCapStyle|GCJoinStyle),
- &gcv);
-
- switch (random() % 11) {
- case 0: case 1: case 2: case 3: t->draw = draw_star; break;
- case 4: case 5: case 6: case 7: t->draw = draw_circle; break;
- case 8: t->draw = draw_hlines; break;
- case 9: t->draw = draw_vlines; break;
- case 10: t->draw = draw_corners; break;
- default: abort(); break;
- }
-
- return t;
-}
-
-static int
-throb (Display *dpy, Drawable window, struct throbber *t)
-{
- t->size += t->speed;
- if (t->size <= (t->thickness / 2))
- {
- t->speed = -t->speed;
- t->size += (t->speed * 2);
- }
- else if (t->size > t->max_size)
- {
- t->speed = -t->speed;
- t->size += (t->speed * 2);
- t->fuse--;
- }
-
- if (t->fuse <= 0)
- {
- XFreeGC (dpy, t->gc);
- memset (t, 0, sizeof(*t));
- free (t);
- return -1;
- }
- else
- {
- t->draw (dpy, window, t);
- return 0;
- }
-}
-
-
-\f
-char *progclass = "Deluxe";
-
-char *defaults [] = {
- ".background: black",
- ".foreground: white",
- "*delay: 5000",
- "*count: 5",
- "*thickness: 50",
- "*speed: 15",
- "*ncolors: 20",
- "*doubleBuffer: True",
-#ifdef HAVE_DOUBLE_BUFFER_EXTENSION
- "*useDBE: True",
-#endif /* HAVE_DOUBLE_BUFFER_EXTENSION */
- 0
-};
-
-XrmOptionDescRec options [] = {
- { "-delay", ".delay", XrmoptionSepArg, 0 },
- { "-thickness", ".thickness", XrmoptionSepArg, 0 },
- { "-count", ".count", XrmoptionSepArg, 0 },
- { "-ncolors", ".ncolors", XrmoptionSepArg, 0 },
- { "-speed", ".speed", XrmoptionSepArg, 0 },
- { "-db", ".doubleBuffer", XrmoptionNoArg, "True" },
- { "-no-db", ".doubleBuffer", XrmoptionNoArg, "False" },
- { 0, 0, 0, 0 }
-};
-
-void
-screenhack (Display *dpy, Window window)
-{
- int count = get_integer_resource ("count", "Integer");
- int delay = get_integer_resource ("delay", "Integer");
- int ncolors = get_integer_resource ("ncolors", "Integer");
- Bool dbuf = get_boolean_resource ("doubleBuffer", "Boolean");
- XColor colors[255];
- XGCValues gcv;
- GC erase_gc = 0;
- int i;
- struct throbber **throbbers;
- XWindowAttributes xgwa;
- Pixmap b=0, ba=0, bb=0; /* double-buffer to reduce flicker */
-#ifdef HAVE_DOUBLE_BUFFER_EXTENSION
- XdbeBackBuffer backb = 0;
-#endif /* HAVE_DOUBLE_BUFFER_EXTENSION */
-
- XGetWindowAttributes (dpy, window, &xgwa);
-
- if (get_boolean_resource("mono", "Boolean"))
- {
- MONO:
- ncolors = 1;
- colors[0].pixel = get_pixel_resource("foreground", "Foreground",
- dpy, xgwa.colormap);
- }
- else
- {
- make_random_colormap (dpy, xgwa.visual, xgwa.colormap,
- colors, &ncolors, True, True, 0, True);
- if (ncolors < 2)
- goto MONO;
- }
-
- if (dbuf)
- {
-#ifdef HAVE_DOUBLE_BUFFER_EXTENSION
- b = backb = xdbe_get_backbuffer (dpy, window, XdbeUndefined);
-#endif /* HAVE_DOUBLE_BUFFER_EXTENSION */
-
- if (!b)
- {
- ba = XCreatePixmap (dpy, window, xgwa.width, xgwa.height,xgwa.depth);
- bb = XCreatePixmap (dpy, window, xgwa.width, xgwa.height,xgwa.depth);
- b = ba;
- }
- }
- else
- {
- b = window;
- }
-
- throbbers = (struct throbber **) calloc (count, sizeof(struct throbber *));
- for (i = 0; i < count; i++)
- throbbers[i] = make_throbber (dpy, b, xgwa.width, xgwa.height,
- colors[random() % ncolors].pixel);
-
- gcv.foreground = get_pixel_resource ("background", "Background",
- dpy, xgwa.colormap);
- erase_gc = XCreateGC (dpy, b, GCForeground, &gcv);
-
- if (ba) XFillRectangle (dpy, ba, erase_gc, 0, 0, xgwa.width, xgwa.height);
- if (bb) XFillRectangle (dpy, bb, erase_gc, 0, 0, xgwa.width, xgwa.height);
-
- while (1)
- {
- XFillRectangle (dpy, b, erase_gc, 0, 0, xgwa.width, xgwa.height);
-
- for (i = 0; i < count; i++)
- if (throb (dpy, b, throbbers[i]) < 0)
- throbbers[i] = make_throbber (dpy, b, xgwa.width, xgwa.height,
- colors[random() % ncolors].pixel);
-
-#ifdef HAVE_DOUBLE_BUFFER_EXTENSION
- if (backb)
- {
- XdbeSwapInfo info[1];
- info[0].swap_window = window;
- info[0].swap_action = XdbeUndefined;
- XdbeSwapBuffers (dpy, info, 1);
- }
- else
-#endif /* HAVE_DOUBLE_BUFFER_EXTENSION */
- if (dbuf)
- {
- XCopyArea (dpy, b, window, erase_gc, 0, 0,
- xgwa.width, xgwa.height, 0, 0);
- b = (b == ba ? bb : ba);
- }
-
- XSync (dpy, False);
- screenhack_handle_events (dpy);
- if (delay)
- usleep (delay);
- }
-}
projects / xscreensaver / blobdiff