From http://www.jwz.org/xscreensaver/xscreensaver-5.30.tar.gz

[xscreensaver] / hacks / xlockmore.c

diff --git a/hacks/xlockmore.c b/hacks/xlockmore.c
index ca4f14935110f92d30c20f8221938d2b426bc366..d5b71f9bb4f956b595cd1daf50b3a6d324117bd4 100644 (file)
--- a/hacks/xlockmore.c
+++ b/hacks/xlockmore.c
@@ -1,5 +1,5 @@
 /* xlockmore.c --- xscreensaver compatibility layer for xlockmore modules.
- * xscreensaver, Copyright (c) 1997-2008 Jamie Zawinski <jwz@jwz.org>
+ * xscreensaver, Copyright (c) 1997-2014 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
@@ -294,26 +294,28 @@ xlockmore_init (Display *dpy, Window window,
   
 #ifdef HAVE_COCOA
   
+# if 0
   /* In Cocoa-based xscreensaver, all hacks run in the same address space,
-     so each one needs to get its own screen number.  We just use a global
-     counter for that, instead of actually trying to figure out which
-     monitor each window is on.  Also, the embedded "preview" view counts
-     as a screen as well.
-    
-     Note that the screen number will increase each time the saver is
-     restarted (e.g., each time preferences are changed!)  So we just
-     keep pushing the num_screens number up as needed, and assume that
-     no more than 10 simultanious copies will be running at once...
+     so each one needs to get its own screen number.  Believe what jwxyz
+     says about screen counts and numbers.
    */
-  {
-    static int screen_tick = 0;
-    mi->num_screens = 10;
-    mi->screen_number = screen_tick++;
-    if (screen_tick >= mi->num_screens)
-      mi->num_screens += 10;
-  }
-  
+  mi->num_screens = ScreenCount (dpy);
+  mi->screen_number = XScreenNumberOfScreen (mi->xgwa.screen);
+# else
+  /* No, that doesn't work.
+     The xlockmore docs/HACKERS.GUIDE says that xlock modes are supposed to
+     support repeated calls to init_*() for the same screen in the same
+     session, but in practice, a number of them blow up if you do that.
+     So instead we're stuck with a world where on OSX/iOS, we have to
+     increment the screen number every time the hack is run. Arrgh.
+   */
+  mi->num_screens = 40;
+  mi->screen_number = xlmft->screen_count;
+  if (mi->screen_number >= mi->num_screens) abort();
+  xlmft->screen_count++;
+# endif
   root_p = True;
+
 #else /* !HAVE_COCOA -- real Xlib */
   
   /* In Xlib-based xscreensaver, each hack runs in its own address space,
@@ -382,18 +384,21 @@ xlockmore_init (Display *dpy, Window window,
       switch (mi->xlmft->desired_color_scheme)
         {
         case color_scheme_uniform:
-          make_uniform_colormap (dpy, mi->xgwa.visual, mi->xgwa.colormap,
+          make_uniform_colormap (mi->xgwa.screen, mi->xgwa.visual,
+                                 mi->xgwa.colormap,
                                  mi->colors, &mi->npixels,
                                  True, &mi->writable_p, True);
           break;
         case color_scheme_smooth:
-          make_smooth_colormap (dpy, mi->xgwa.visual, mi->xgwa.colormap,
+          make_smooth_colormap (mi->xgwa.screen, mi->xgwa.visual,
+                                mi->xgwa.colormap,
                                 mi->colors, &mi->npixels,
                                 True, &mi->writable_p, True);
           break;
         case color_scheme_bright:
         case color_scheme_default:
-          make_random_colormap (dpy, mi->xgwa.visual, mi->xgwa.colormap,
+          make_random_colormap (mi->xgwa.screen, mi->xgwa.visual,
+                                mi->xgwa.colormap,
                                 mi->colors, &mi->npixels,
                                 (mi->xlmft->desired_color_scheme ==
                                  color_scheme_bright),
@@ -443,6 +448,7 @@ xlockmore_init (Display *dpy, Window window,
   mi->use_shm = get_boolean_resource (dpy, "useSHM", "Boolean");
 #endif /* !HAVE_XSHM_EXTENSION */
   mi->fps_p = get_boolean_resource (dpy, "doFPS", "DoFPS");
+  mi->recursion_depth = -1;  /* see fps.c */
 
   if (mi->pause < 0)
     mi->pause = 0;
@@ -523,6 +529,15 @@ xlockmore_event (Display *dpy, Window window, void *closure, XEvent *event)
     return False;
 }
 
+void
+xlockmore_do_fps (Display *dpy, Window w, fps_state *fpst, void *closure)
+{
+  ModeInfo *mi = (ModeInfo *) closure;
+  fps_compute (fpst, 0, mi ? mi->recursion_depth : -1);
+  fps_draw (fpst);
+}
+
+
 static void
 xlockmore_free (Display *dpy, Window window, void *closure)
 {