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

[xscreensaver] / hacks / glx / moebiusgears.c

diff --git a/hacks/glx/moebiusgears.c b/hacks/glx/moebiusgears.c
index b8dd5a41160c76f74a55a02bc11cfd74e8956369..0f058b81e603f43c037c5cbce772302855250762 100644 (file)
--- a/hacks/glx/moebiusgears.c
+++ b/hacks/glx/moebiusgears.c
@@ -13,8 +13,9 @@
                        "*count:        17          \n" \
                        "*showFPS:      False       \n" \
                        "*wireframe:    False       \n" \
+                       "*suppressRotationAnimation: True\n" \
 
-# define refresh_mgears 0
+# define free_mgears 0
 # define release_mgears 0
 #undef countof
 #define countof(x) (sizeof((x))/sizeof((*x)))
@@ -91,8 +92,15 @@ ENTRYPOINT void
 reshape_mgears (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();
@@ -104,6 +112,14 @@ reshape_mgears (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);
 }
 
@@ -227,14 +243,7 @@ init_mgears (ModeInfo *mi)
   mgears_configuration *bp;
   int wire = MI_IS_WIREFRAME(mi);
 
-  if (!bps) {
-    bps = (mgears_configuration *)
-      calloc (MI_NUM_SCREENS(mi), sizeof (mgears_configuration));
-    if (!bps) {
-      fprintf(stderr, "%s: out of memory\n", progname);
-      exit(1);
-    }
-  }
+  MI_INIT (mi, bps);
 
   bp = &bps[MI_SCREEN(mi)];