+++ /dev/null
-/* xscreensaver, Copyright (c) 1992-1996 Jamie Zawinski <jwz@netscape.com>
- *
- * 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.
- */
-
-#if __STDC__
-# include <stdlib.h>
-#endif
-
-#include <stdio.h>
-#include <X11/Xlib.h>
-#include <X11/Xos.h>
-
-#if __STDC__
-# define P(x)x
-#else
-# define P(x)()
-#endif
-
-extern int get_visual_class P((Display *, Visual *));
-extern void screenhack_usleep P((unsigned long));
-#define usleep screenhack_usleep
-
-#define MAX_COLORS 4096
-static XColor orig_colors [MAX_COLORS];
-static XColor current_colors [MAX_COLORS];
-static int ncolors;
-
-Colormap
-copy_colormap (dpy, cmap, into_cmap)
- Display *dpy;
- Colormap cmap, into_cmap;
-{
- int i;
- Screen *screen = DefaultScreenOfDisplay (dpy);
- Visual *visual = DefaultVisualOfScreen (screen);
- Window window = RootWindowOfScreen (screen);
- int vclass = get_visual_class (dpy, visual);
-
- ncolors = CellsOfScreen (screen);
-
- /* If this is a colormap on a mono visual, or one with insanely many
- color cells, bug out. */
- if (ncolors <= 2 || ncolors > MAX_COLORS)
- return 0;
- /* If this is a non-writable visual, bug out. */
- if (vclass == StaticGray || vclass == StaticColor || vclass == TrueColor)
- return 0;
-
- if (! into_cmap)
- into_cmap = XCreateColormap (dpy, window, visual, AllocAll);
- if (! cmap)
- cmap = DefaultColormap (dpy, DefaultScreen (dpy));
- for (i = 0; i < ncolors; i++)
- orig_colors [i].pixel = i;
- XQueryColors (dpy, cmap, orig_colors, ncolors);
- XStoreColors (dpy, into_cmap, orig_colors, ncolors);
- return into_cmap;
-}
-
-void
-blacken_colormap (dpy, cmap)
- Display *dpy;
- Colormap cmap;
-{
- int i;
- for (i = 0; i < ncolors; i++)
- {
- current_colors [i].pixel = i;
- current_colors [i].red = current_colors [i].green =
- current_colors [i].blue = 0;
- }
- XStoreColors (dpy, cmap, current_colors, ncolors);
-}
-
-
-/* The business with `install_p' and `extra_cmaps' is to fake out the SGI
- 8-bit video hardware, which is capable of installing multiple (4) colormaps
- simultaniously. We have to install multiple copies of the same set of
- colors in order to fill up all the available slots in the hardware color
- lookup table.
- */
-
-void
-fade_colormap (dpy, cmap, cmap2, seconds, ticks, out_p, install_p)
- Display *dpy;
- Colormap cmap, cmap2;
- int seconds, ticks;
- Bool out_p;
- Bool install_p;
-{
- int i;
- int steps = seconds * ticks;
- XEvent dummy_event;
-
- Screen *screen = DefaultScreenOfDisplay (dpy);
- Visual *visual = DefaultVisualOfScreen (screen);
- Window window = RootWindowOfScreen (screen);
- static Colormap extra_cmaps[4] = { 0, };
- int n_extra_cmaps = sizeof(extra_cmaps)/sizeof(*extra_cmaps);
-
- if (! cmap2)
- return;
-
- for (i = 0; i < ncolors; i++)
- orig_colors [i].pixel = i;
- XQueryColors (dpy, cmap, orig_colors, ncolors);
- memcpy (current_colors, orig_colors, ncolors * sizeof (XColor));
-
- if (install_p)
- for (i=0; i < n_extra_cmaps; i++)
- if (!extra_cmaps[i])
- extra_cmaps[i] = XCreateColormap (dpy, window, visual, AllocAll);
-
- for (i = (out_p ? steps : 0);
- (out_p ? i > 0 : i < steps);
- (out_p ? i-- : i++))
- {
- int j;
- for (j = 0; j < ncolors; j++)
- {
- current_colors[j].red = orig_colors[j].red * i / steps;
- current_colors[j].green = orig_colors[j].green * i / steps;
- current_colors[j].blue = orig_colors[j].blue * i / steps;
- }
- XStoreColors (dpy, cmap2, current_colors, ncolors);
-
- if (install_p)
- {
- for (j=0; j < n_extra_cmaps; j++)
- if (extra_cmaps[j])
- XStoreColors (dpy, extra_cmaps[j], current_colors, ncolors);
-
- for (j=0; j < n_extra_cmaps; j++)
- if (extra_cmaps[j])
- XInstallColormap (dpy, extra_cmaps[j]);
- XInstallColormap (dpy, cmap2);
- }
-
- XSync (dpy, False);
-
- /* If there is user activity, bug out.
- We put the event back so that the calling code can notice it too.
- It would be better to not remove it at all, but that's harder
- because Xlib has such a non-design for this kind of crap, and
- in this application it doesn't matter if the events end up out
- of order, so in the grand unix tradition we say "fuck it" and
- do something that mostly works for the time being.
- */
- if (XCheckMaskEvent (dpy, (KeyPressMask | KeyReleaseMask |
- ButtonPressMask | ButtonReleaseMask |
- PointerMotionMask),
- &dummy_event))
- {
- XPutBackEvent (dpy, &dummy_event);
- goto DONE;
- }
-
- usleep (1000000 / (ticks * 2)); /* the 2 is a hack... */
- }
-
-DONE:
-
- if (install_p)
- {
- XInstallColormap (dpy, cmap2);
-/* for (i=0; i < n_extra_cmaps; i++)
- if (extra_cmaps[i])
- XFreeColormap (dpy, extra_cmaps[i]);
- */
- }
-}
-
-\f
-#if 0
-#include "../hacks/screenhack.h"
-char *progclass = "foo";
-char *defaults [] = {
- 0
-};
-
-XrmOptionDescRec options [] = {0};
-int options_size = 0;
-
-void
-screenhack (dpy, w)
- Display *dpy;
- Window w;
-{
- Colormap cmap = DefaultColormap (dpy, DefaultScreen (dpy));
- Colormap cmap2 = copy_colormap (dpy, cmap, 0);
-
- int seconds = 1;
- int ticks = 30 * seconds;
- int delay = 1;
-
- XSynchronize (dpy, True);
-
- while (1)
- {
- XSync (dpy, False);
-/* XGrabServer (dpy); */
- fprintf(stderr,"out..."); fflush(stderr);
- XInstallColormap (dpy, cmap2);
- fade_colormap (dpy, cmap, cmap2, seconds, ticks, True, True);
- fprintf(stderr, "done.\n"); fflush(stderr);
- if (delay) sleep (delay);
- fprintf(stderr,"in..."); fflush(stderr);
- fade_colormap (dpy, cmap, cmap2, seconds, ticks, False, True);
- XInstallColormap (dpy, cmap);
- fprintf(stderr, "done.\n"); fflush(stderr);
- XUngrabServer (dpy);
- XSync (dpy, False);
- if (delay) sleep (delay);
- }
-}
-
-#endif
projects / xscreensaver / blobdiff