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

[xscreensaver] / hacks / glx / boxed.c

diff --git a/hacks/glx/boxed.c b/hacks/glx/boxed.c
index 4e16f09e2ec5b6477ef551cea8523ef7fd0a8092..a7f07d4c313473f489d7bf3cebcde02f6cf99ae1 100644 (file)
--- a/hacks/glx/boxed.c
+++ b/hacks/glx/boxed.c
@@ -1029,7 +1029,15 @@ static void draw(ModeInfo * mi)
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
    glLoadIdentity();
    
-   glRotatef(current_device_rotation(), 0, 0, 1);
+# 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);
+    glRotatef(o, 0, 0, 1);
+  }
+# endif
 
    gp->tic += 0.01f;
    gp->camtic += 0.01f + 0.01f * sin(gp->tic * speed);