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 3caae97f6f8d0b89d25c7a67b85beb3a0c28e0ba..dbb2ce6741d6bbd17ac8c12a793e72858b53007a 100644 (file)
--- a/hacks/glx/hilbert.c
+++ b/hacks/glx/hilbert.c
@@ -21,7 +21,7 @@
                        "*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)))
@@ -757,8 +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();
@@ -838,7 +845,7 @@ init_hilbert (ModeInfo *mi)
   int wire = MI_IS_WIREFRAME(mi);
   int i;
 
-  MI_INIT (mi, bps, NULL);
+  MI_INIT (mi, bps);
 
   bp = &bps[MI_SCREEN(mi)];