FGAPI int FGAPIENTRY glutBitmapLength( void* font, const char* string );
FGAPI int FGAPIENTRY glutStrokeLength( void* font, const char* string );
FGAPI int FGAPIENTRY glutBitmapHeight( void* font );
FGAPI int FGAPIENTRY glutBitmapLength( void* font, const char* string );
FGAPI int FGAPIENTRY glutStrokeLength( void* font, const char* string );
FGAPI int FGAPIENTRY glutBitmapHeight( void* font );