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

[xscreensaver] / hacks / glx / moebius.c

diff --git a/hacks/glx/moebius.c b/hacks/glx/moebius.c
index 80a8246381a171d7c2036ce94e9238187d1ae0d2..5fe2d9b8a8c4f43438ee51932eff61010bd6ff5a 100644 (file)
--- a/hacks/glx/moebius.c
+++ b/hacks/glx/moebius.c
@@ -79,7 +79,7 @@ static const char sccsid[] = "@(#)moebius.c   5.01 2001/03/01 xlockmore";
 
 #ifdef STANDALONE
 # define MODE_moebius
-# define refresh_moebius 0
+# define free_moebius 0
 # define release_moebius 0
 # define DEFAULTS                      "*delay:                20000   \n"                     \
                                                        "*showFPS:      False   \n"                     \
@@ -564,8 +564,14 @@ ENTRYPOINT void
 reshape_moebius (ModeInfo * mi, int width, int height)
 {
        moebiusstruct *mp = &moebius[MI_SCREEN(mi)];
+    int y = 0;
 
-       glViewport(0, 0, mp->WindW = (GLint) width, mp->WindH = (GLint) height);
+    if (width > height * 5) {   /* tiny window: show middle */
+      height = width;
+      y = -height/2;
+    }
+
+       glViewport(0, y, mp->WindW = (GLint) width, mp->WindH = (GLint) height);
        glMatrixMode(GL_PROJECTION);
        glLoadIdentity();
        glFrustum(-1.0, 1.0, -1.0, 1.0, 5.0, 15.0);
@@ -673,7 +679,7 @@ init_moebius (ModeInfo * mi)
 {
        moebiusstruct *mp;
 
-       MI_INIT (mi, moebius, NULL);
+       MI_INIT (mi, moebius);
        mp = &moebius[MI_SCREEN(mi)];
        mp->step = NRAND(90);
        mp->ant_position = NRAND(90);