From Olaf Flebbe, "FlightGear/OSG on Windows did not load the Texture Fonts.

1) TXF Fonts are binary.
2) Do not rely on the result of istream::readsome if buffer _is_ empty
and no data have been read before."

src/osgPlugins/txf/ReaderWriterTXF.cpp

@@ -39,7 +39,7 @@ class ReaderWriterTXF : public osgDB::ReaderWriter
             if (fileName.empty()) return ReadResult::FILE_NOT_FOUND;
 
             std::ifstream stream;
-            stream.open(fileName.c_str(), std::ios::in);
+        stream.open(fileName.c_str(), std::ios::in | std::ios::binary);
             if (!stream.is_open()) return ReadResult::FILE_NOT_FOUND;
 
             TXFFont* impl = new TXFFont(fileName);