From http://www.jwz.org/xscreensaver/xscreensaver-5.35.tar.gz

[xscreensaver] / hacks / spotlight.c

diff --git a/hacks/spotlight.c b/hacks/spotlight.c
index fffa6a83bcbaa4f836328676409a6ef38036abba..7224ee855406918ed1e49c1b6a0a6cd09e364d24 100644 (file)
--- a/hacks/spotlight.c
+++ b/hacks/spotlight.c
@@ -1,6 +1,6 @@
 /*
  * spotlight - an xscreensaver module
- * Copyright (c) 1999, 2001 Rick Schultz <rick@skapunx.net>
+ * Copyright (c) 1999, 2001 Rick Schultz <rick.schultz@gmail.com>
  *
  * loosely based on the BackSpace module "StefView" by Darcy Brockbank
  */
@@ -22,6 +22,7 @@
 
 /* #define DEBUG */
 #include <math.h>
+#include <limits.h>
 #include "screenhack.h"
 
 #define MINX 0.0
@@ -32,9 +33,13 @@
 struct state {
   Display *dpy;
   Window window;
+  Screen *screen;
 
   int sizex, sizey; /* screen size */
-  int delay;        /* in case it's too fast... */
+  int delay;
+  int duration;
+  time_t start_time;
+  int first_time;
   GC window_gc;
 #ifdef DEBUG
   GC white_gc;
@@ -69,13 +74,15 @@ static long
 currentTimeInMs(struct state *st)
 {
   struct timeval curTime;
+  unsigned long ret_unsigned;
 #ifdef GETTIMEOFDAY_TWO_ARGS
   struct timezone tz = {0,0};
   gettimeofday(&curTime, &tz);
 #else
   gettimeofday(&curTime);
 #endif
-  return curTime.tv_sec*1000 + curTime.tv_usec/1000.0;
+  ret_unsigned = curTime.tv_sec *1000U + curTime.tv_usec / 1000;
+  return (ret_unsigned <= LONG_MAX) ? ret_unsigned : -1 - (long)(ULONG_MAX - ret_unsigned);
 }
 
 
@@ -87,7 +94,7 @@ spotlight_init (Display *dpy, Window window)
   XWindowAttributes xgwa;
   long gcflags;
   Colormap cmap;
-  unsigned long fg, bg;
+  unsigned long bg;
   GC clip_gc;
   Pixmap clip_pm;
 
@@ -96,15 +103,17 @@ spotlight_init (Display *dpy, Window window)
   st->first_p = True;
 
   XGetWindowAttributes (st->dpy, st->window, &xgwa);
+  st->screen = xgwa.screen;
   st->sizex = xgwa.width;
   st->sizey = xgwa.height;
   cmap = xgwa.colormap;
-  fg = get_pixel_resource (st->dpy, cmap, "foreground", "Foreground");
   bg = get_pixel_resource (st->dpy, cmap, "background", "Background");
 
   /* read parameters, keep em sane */
   st->delay = get_integer_resource (st->dpy, "delay", "Integer");
   if (st->delay < 1) st->delay = 1;
+  st->duration = get_integer_resource (st->dpy, "duration", "Seconds");
+  if (st->duration < 1) st->duration = 1;
   st->radius = get_integer_resource (st->dpy, "radius", "Integer");
   if (st->radius < 0) st->radius = 125;
 
@@ -129,12 +138,13 @@ spotlight_init (Display *dpy, Window window)
 #endif
   st->window_gc = XCreateGC(st->dpy, st->window, gcflags, &gcv);
 
-  /* grab screen to pixmap */
   st->pm = XCreatePixmap(st->dpy, st->window, st->sizex, st->sizey, xgwa.depth);
   XClearWindow(st->dpy, st->window);
 
+  st->first_time = 1;
+
   /* create buffer to reduce flicker */
-#ifdef HAVE_COCOA      /* Don't second-guess Quartz's double-buffering */
+#ifdef HAVE_JWXYZ      /* Don't second-guess Quartz's double-buffering */
   st->buffer = 0;
 #else
   st->buffer = XCreatePixmap(st->dpy, st->window, st->sizex, st->sizey, xgwa.depth);
@@ -144,14 +154,11 @@ spotlight_init (Display *dpy, Window window)
   if (st->buffer)
     XFillRectangle(st->dpy, st->buffer, st->buffer_gc, 0, 0, st->sizex, st->sizey);
 
-  /* blank out screen */
-  XFillRectangle(st->dpy, st->window, st->window_gc, 0, 0, st->sizex, st->sizey);
-  XSetWindowBackground (st->dpy, st->window, bg);
-
   /* create clip mask (so it's a circle, not a square) */
   clip_pm = XCreatePixmap(st->dpy, st->window, st->radius*4, st->radius*4, 1);
   st->img_loader = load_image_async_simple (0, xgwa.screen, st->window, st->pm,
                                             0, 0);
+  st->start_time = time ((time_t *) 0);
 
   gcv.foreground = 0L;
   clip_gc = XCreateGC(st->dpy, clip_pm, gcflags, &gcv);
@@ -173,11 +180,9 @@ spotlight_init (Display *dpy, Window window)
   
   st->off = random();
 
-#ifdef DEBUG
-  /* create GC with white fg */
-  gcv.foreground = fg;
-  st->white_gc = XCreateGC(st->dpy, st->window, gcflags, &gcv);
-#endif
+  /* blank out screen */
+  XFillRectangle(st->dpy, st->window, st->window_gc, 0, 0, st->sizex, st->sizey);
+
   return st;
 }
 
@@ -189,13 +194,24 @@ static void
 onestep (struct state *st, Bool first_p)
 {
   long now;
+  unsigned long now_unsigned;
 
   if (st->img_loader)   /* still loading */
     {
       st->img_loader = load_image_async_simple (st->img_loader, 0, 0, 0, 0, 0);
+      if (! st->img_loader) {  /* just finished */
+        st->start_time = time ((time_t *) 0);
+      }
       return;
     }
 
+  if (!st->img_loader &&
+      st->start_time + st->duration < time ((time_t *) 0)) {
+    st->img_loader = load_image_async_simple (0, st->screen, st->window,
+                                              st->pm, 0, 0);
+    return;
+  }
+
 #define nrnd(x) (random() % (x))
 
   st->oldx = st->x;
@@ -203,7 +219,8 @@ onestep (struct state *st, Bool first_p)
 
   st->s = st->radius *4 ;   /* s = width of buffer */
 
-  now = currentTimeInMs(st) + st->off;
+  now_unsigned = (unsigned long) currentTimeInMs(st) + st->off;
+  now = (now_unsigned <= LONG_MAX) ? now_unsigned : -1 - (long)(ULONG_MAX - now_unsigned);
 
   /* find new x,y */
   st->x = ((1 + sin(((double)now) / X_PERIOD * 2. * M_PI))/2.0) 
@@ -236,6 +253,12 @@ onestep (struct state *st, Bool first_p)
       XSetClipOrigin(st->dpy, st->buffer_gc, st->x,st->y);
       XCopyArea(st->dpy, st->pm, st->buffer, st->buffer_gc, st->x, st->y, st->s, st->s, st->x, st->y);
 
+      if (st->first_time) {
+        /* blank out screen */
+        XFillRectangle(st->dpy, st->window, st->window_gc, 0, 0, st->sizex, st->sizey);
+        st->first_time = 0;
+      }
+
       /* copy buffer to screen (window) */
       XCopyArea(st->dpy, st->buffer, st->window, st->window_gc, st->x , st->y, st->s, st->s, st->x, st->y);
     }
@@ -266,6 +289,12 @@ spotlight_reshape (Display *dpy, Window window, void *closure,
 static Bool
 spotlight_event (Display *dpy, Window window, void *closure, XEvent *event)
 {
+  struct state *st = (struct state *) closure;
+  if (screenhack_event_helper (dpy, window, event))
+    {
+      st->start_time = 0;
+      return True;
+    }
   return False;
 }
 
@@ -287,18 +316,25 @@ static const char *spotlight_defaults [] = {
   ".background:                        black",
   ".foreground:                        white",
   "*dontClearRoot:             True",
+  "*fpsSolid:                  true",
 
 #ifdef __sgi   /* really, HAVE_READ_DISPLAY_EXTENSION */
   "*visualID:                  Best",
 #endif
 
   "*delay:                     10000",
+  "*duration:                  120",
   "*radius:                    125",
+#ifdef HAVE_MOBILE
+  "*ignoreRotation:             True",
+  "*rotateImages:               True",
+#endif
   0
 };
 
 static XrmOptionDescRec spotlight_options [] = {
   { "-delay",          ".delay",               XrmoptionSepArg, 0 },
+  { "-duration",       ".duration",            XrmoptionSepArg, 0 },
   { "-radius",         ".radius",              XrmoptionSepArg, 0 },
   { 0, 0, 0, 0 }
 };