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

[xscreensaver] / hacks / glx / glknots.c

diff --git a/hacks/glx/glknots.c b/hacks/glx/glknots.c
index 15c67dee56c5acd471eb31ef14cb0e42e78bb3ac..730cadb19ec9274708b49f8402879ca38b8504df 100644 (file)
--- a/hacks/glx/glknots.c
+++ b/hacks/glx/glknots.c
@@ -18,7 +18,7 @@
                        "*wireframe:    False       \n" \
                        "*suppressRotationAnimation: True\n" \
 
-# define refresh_knot 0
+# define free_knot 0
 # define release_knot 0
 #undef countof
 #define countof(x) (sizeof((x))/sizeof((*x)))
@@ -178,8 +178,15 @@ ENTRYPOINT void
 reshape_knot (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();
@@ -257,7 +264,7 @@ init_knot (ModeInfo *mi)
   knot_configuration *bp;
   int wire = MI_IS_WIREFRAME(mi);
 
-  MI_INIT (mi, bps, NULL);
+  MI_INIT (mi, bps);
 
   bp = &bps[MI_SCREEN(mi)];