From http://www.jwz.org/xscreensaver/xscreensaver-5.38.tar.gz

[xscreensaver] / hacks / glx / hilbert.c

diff --git a/hacks/glx/hilbert.c b/hacks/glx/hilbert.c
index 8374dec363d7eef2ff24caba4ff84f3a4e945520..dbb2ce6741d6bbd17ac8c12a793e72858b53007a 100644 (file)
--- a/hacks/glx/hilbert.c
+++ b/hacks/glx/hilbert.c
@@ -18,9 +18,10 @@
                        "*count:        30          \n" \
                        "*showFPS:      False       \n" \
                        "*wireframe:    False       \n" \
-                       "*geometry:     800x800\n"
+                       "*geometry:     800x800\n" \
+                       "*suppressRotationAnimation: True\n" \
 
-# define refresh_hilbert 0
+# define free_hilbert 0
 # define release_hilbert 0
 #undef countof
 #define countof(x) (sizeof((x))/sizeof((*x)))
@@ -756,8 +757,15 @@ ENTRYPOINT void
 reshape_hilbert (ModeInfo *mi, int width, int height)
 {
   GLfloat h = (GLfloat) height / (GLfloat) width;
+  int y = 0;
 
-  glViewport (0, 0, (GLint) width, (GLint) height);
+  if (width > height * 5) {   /* tiny window: show middle */
+    height = width * 9/16;
+    y = -height/2;
+    h = height / (GLfloat) width;
+  }
+
+  glViewport (0, y, (GLint) width, (GLint) height);
 
   glMatrixMode(GL_PROJECTION);
   glLoadIdentity();
@@ -769,6 +777,14 @@ reshape_hilbert (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);
 }
 
@@ -829,14 +845,7 @@ init_hilbert (ModeInfo *mi)
   int wire = MI_IS_WIREFRAME(mi);
   int i;
 
-  if (!bps) {
-    bps = (hilbert_configuration *)
-      calloc (MI_NUM_SCREENS(mi), sizeof (hilbert_configuration));
-    if (!bps) {
-      fprintf(stderr, "%s: out of memory\n", progname);
-      exit(1);
-    }
-  }
+  MI_INIT (mi, bps);
 
   bp = &bps[MI_SCREEN(mi)];