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

[xscreensaver] / hacks / zoom.c

diff --git a/hacks/zoom.c b/hacks/zoom.c
index 439b8a1f04d62f59f6a7f949a31995bed3adbb21..99a652a54cd5f5d9abc9842fbece4bc37904e4f0 100644 (file)
--- a/hacks/zoom.c
+++ b/hacks/zoom.c
@@ -11,6 +11,7 @@
  */
 
 #include <math.h>
+#include <limits.h>
 #include "screenhack.h"
 
 #ifndef MIN
@@ -24,8 +25,8 @@
 #define MINX 0.0
 #define MINY 0.0
 /* This should be *way* slower than the spotlight hack was */
-#define X_PERIOD 45000.0
-#define Y_PERIOD 36000.0
+#define X_PERIOD (45000.0 * 3)
+#define Y_PERIOD (36000.0 * 3)
 
 struct state {
   Display *dpy;
@@ -56,13 +57,15 @@ struct state {
 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);
 }
 
 static void *
@@ -124,7 +127,7 @@ zoom_init (Display *dpy, Window window)
   XFillRectangle(st->dpy, st->window, st->window_gc, 0, 0, st->sizex, st->sizey);
   XSetWindowBackground(st->dpy, st->window, bg);
 
-  st->start_time = time ((time_t) 0);
+  st->start_time = time ((time_t *) 0);
   st->img_loader = load_image_async_simple (0, xgwa.screen, st->window,
                                             st->pm, 0, 0);
 
@@ -153,13 +156,14 @@ zoom_draw (Display *dpy, Window window, void *closure)
   unsigned x, y, i, j;
 
   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 */
         XClearWindow (st->dpy, st->window);
-        st->start_time = time ((time_t) 0);
+        st->start_time = time ((time_t *) 0);
         if (!st->lenses) {
           st->orig_map = XGetImage(st->dpy, st->pm, 0, 0, st->sizex, st->sizey, ~0L, ZPixmap);
 /*          XFreePixmap(st->dpy, st->pm);
@@ -170,7 +174,7 @@ zoom_draw (Display *dpy, Window window, void *closure)
     }
 
   if (!st->img_loader &&
-      st->start_time + st->duration < time ((time_t) 0)) {
+      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 st->delay;
@@ -179,7 +183,8 @@ zoom_draw (Display *dpy, Window window, void *closure)
 #define nrnd(x) (random() % (x))
 
   now = currentTimeInMs(st);
-  now += st->sinusoid_offset;  /* don't run multiple screens in lock-step */
+  now_unsigned = (unsigned long) now + st->sinusoid_offset;  /* don't run multiple screens in lock-step */
+  now = (now_unsigned <= LONG_MAX) ? now_unsigned : -1 - (long)(ULONG_MAX - now_unsigned);
 
   /* find new x,y */
   st->tlx = ((1. + sin(((double)now) / X_PERIOD * 2. * M_PI))/2.0)
@@ -218,6 +223,12 @@ zoom_reshape (Display *dpy, Window window, void *closure,
 static Bool
 zoom_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;
 }
 
@@ -243,14 +254,15 @@ static const char *zoom_defaults[] = {
   "*lenses:      true",
   "*delay:       10000",
   "*duration:    120",
-  "*pixwidth:    10",
-  "*pixheight:   10",
+  "*pixwidth:    40",
+  "*pixheight:   40",
   "*pixspacex:   2",
   "*pixspacey:   2",
   "*lensoffsetx: 5",
   "*lensoffsety: 5",
-#ifdef USE_IPHONE
+#ifdef HAVE_MOBILE
   "*ignoreRotation: True",
+  "*rotateImages:   True",
 #endif
   0
 };