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

[xscreensaver] / hacks / glx / providence.c

diff --git a/hacks/glx/providence.c b/hacks/glx/providence.c
index fcf8d316f540206ab8ed51cd1d07a1f09ba4e418..695ef7571ab170c77fb0453809da78466beb62c9 100644 (file)
--- a/hacks/glx/providence.c
+++ b/hacks/glx/providence.c
@@ -767,6 +767,15 @@ ENTRYPOINT void draw_providence(ModeInfo * mi)
   gltrackball_rotate(mp->trackball);
   glRotatef(mp->theta * 180.0 / Pi, 0.0, -1.0, 0.0);
 
+# ifdef HAVE_MOBILE    /* Keep it the same relative size when rotated. */
+  {
+    GLfloat h = MI_HEIGHT(mi) / (GLfloat) MI_WIDTH(mi);
+    int o = (int) current_device_rotation();
+    if (o != 0 && o != 180 && o != -180)
+      glScalef (1/h, 1/h, 1/h);
+  }
+# endif
+
   /* draw providence */
   draw_providence_strip(mi);
   glPopMatrix();