多文本的显示片段数据，把多文字格式分析后，生成的显示数据

struct McDbMTextFragment {
  McGePoint3d location;
  McGeVector3d normal;
  McGeVector3d direction;
  CString text;
  CString font;
  CString bigfont;
  McGePoint2d extents;
  double capsHeight;
  double widthFactor;
  double obliqueAngle;
  double trackingFactor;
  McCmColor color;
  unsigned stackTop : 1;
  unsigned stackBottom : 1;
  unsigned underlined : 1;
  unsigned overlined : 1;
  McGePoint3d underPoints[2];
  McGePoint3d overPoints[2];
  CString fontname;
  bool bold;
  bool italic;
};