diff --git a/3rdparty/fonts/fnt.cxx b/3rdparty/fonts/fnt.cxx
index 50e619e..f340e28 100644
--- a/3rdparty/fonts/fnt.cxx
+++ b/3rdparty/fonts/fnt.cxx
@@ -168,6 +168,7 @@ void fntTexFont::getBBox ( const char *s,
   //zhongjin
   SG_LOG(SG_GUI,SG_ALERT, "getBBox " << s);
 
+
   l = r = b = t = 0.0f ;
 
   while ( *s != '\0' )
@@ -180,16 +181,21 @@ void fntTexFont::getBBox ( const char *s,
       continue ;
     }
 
-    unsigned int cc = (unsigned char) *(s++) ;
+//    unsigned int cc = (unsigned char) *(s++) ;
+    unsigned int cc = (unsigned int) *(s++) ;
+
+    SG_LOG(SG_GUI,SG_ALERT, "cc=" << cc);
+
 
     if ( ! exists [ cc ] )
     {
+      /*
       if ( cc >= 'A' && cc <= 'Z' )
         cc = cc - 'A' + 'a' ;
       else
       if ( cc >= 'a' && cc <= 'z' )
         cc = cc - 'a' + 'A' ;
-  
+      */
       if ( cc == ' ' )
       {
         r += 0.5f ;
@@ -220,6 +226,10 @@ void fntTexFont::getBBox ( const char *s,
     h_pos += gap + ( fixed_pitch ? width : widths[cc] ) ;
   }
 
+  //zhongjin
+  SG_LOG(SG_GUI,SG_ALERT, "......................");
+
+
   if ( left  != NULL ) *left  = l * pointsize ;
   if ( right != NULL ) *right = r * pointsize ;
   if ( top   != NULL ) *top   = t * pointsize ;