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

[xscreensaver] / hacks / glx / glknots.c

diff --git a/hacks/glx/glknots.c b/hacks/glx/glknots.c
index fead436e35e31122f616a4908d7337462d0420c1..8dd63728e8ee8650fb568ddef501e76b4a302314 100644 (file)
--- a/hacks/glx/glknots.c
+++ b/hacks/glx/glknots.c
@@ -16,6 +16,7 @@
 #define DEFAULTS       "*delay:        30000       \n" \
                        "*showFPS:      False       \n" \
                        "*wireframe:    False       \n" \
+                       "*suppressRotationAnimation: True\n" \
 
 # define refresh_knot 0
 # define release_knot 0
@@ -190,6 +191,14 @@ reshape_knot (ModeInfo *mi, int width, int height)
              0.0, 0.0, 0.0,
              0.0, 1.0, 0.0);
 
+# ifdef HAVE_MOBILE    /* Keep it the same relative size when rotated. */
+  {
+    int o = (int) current_device_rotation();
+    if (o != 0 && o != 180 && o != -180)
+      glScalef (1/h, 1/h, 1/h);
+  }
+# endif
+
   glClear(GL_COLOR_BUFFER_BIT);
 }
 
@@ -352,7 +361,7 @@ draw_knot (ModeInfo *mi)
               now - bp->last_time >= duration)
             {
               bp->mode = 1;    /* go out */
-              bp->mode_tick = 10 * speed;
+              bp->mode_tick = 10 / speed;
               bp->last_time = now;
             }
         }
@@ -362,7 +371,7 @@ draw_knot (ModeInfo *mi)
       if (--bp->mode_tick <= 0)
         {
           new_knot (mi);
-          bp->mode_tick = 10 * speed;
+          bp->mode_tick = 10 / speed;
           bp->mode = 2;  /* go in */
         }
     }
@@ -416,8 +425,8 @@ draw_knot (ModeInfo *mi)
   if (bp->mode != 0)
     {
       GLfloat s = (bp->mode == 1
-                   ? bp->mode_tick / (10 * speed)
-                   : ((10 * speed) - bp->mode_tick + 1) / (10 * speed));
+                   ? bp->mode_tick / (10 / speed)
+                   : ((10 / speed) - bp->mode_tick + 1) / (10 / speed));
       glScalef (s, s, s);
     }