获取TTF里面的字体名称

网上有个Java版本的，我拿过来改了个C#版的，废话不多说，直接上代码

public class TTFParser
    {
        public static int COPYRIGHT = 0;
        public static int FAMILY_NAME = 1;
        public static int FONT_SUBFAMILY_NAME = 2;
        public static int UNIQUE_FONT_IDENTIFIER = 3;
        public static int FULL_FONT_NAME = 4;
        public static int VERSION = 5;
        public static int POSTSCRIPT_NAME = 6;
        public static int TRADEMARK = 7;
        public static int MANUFACTURER = 8;
        public static int DESIGNER = 9;
        public static int DESCRIPTION = 10;
        public static int URL_VENDOR = 11;
        public static int URL_DESIGNER = 12;
        public static int LICENSE_DESCRIPTION = 13;
        public static int LICENSE_INFO_URL = 14;


        private Dictionary fontProperties = new Dictionary();


        /**
         * 获取ttf font name
         * @return
         */
        public string FontName
        {
            get
            {


                if (fontProperties.ContainsKey(FULL_FONT_NAME))
                {
                    return fontProperties[FULL_FONT_NAME];
                }
                else if (fontProperties.ContainsKey(FAMILY_NAME))
                {
                    return fontProperties[FAMILY_NAME];
                }
                else
                {
                    return null;
                }
            }
        }




        /**
         * 获取ttf属性
         * @param nameID 属性标记，见静态变量
         * @return 属性值
         */
        public string GetFontPropertie(int nameID)
        {


            if (fontProperties.ContainsKey(nameID))
            {
                return fontProperties[nameID];
            }
            else
            {
                return null;
            }
        }


        /**
         * 获取ttf属性集合
         * @return 属性集合(Dictionary)
         */
        public Dictionary FontProperties
        {
            get { return fontProperties; }
        }


        /**
         * 执行解析
         * @param fileName ttf文件名
         * @throws IOException
         */
        public void Parse(string fileName)
        {
            fontProperties.Clear();
            FileStream f = null;
            f = new FileStream(fileName, FileMode.Open, FileAccess.Read);
            ParseInner(f);
            f.Close();
        }


        private short ReadShort(FileStream stream)
        {
            byte[] buffer = new byte[2];


            if (stream.Read(buffer, 0, buffer.Length) < buffer.Length)
                return -1;


            return (short)(buffer[0] << 8 | buffer[1]);


        }


        private int ReadInt(FileStream stream)
        {
            byte[] buffer = new byte[4];


            if (stream.Read(buffer, 0, buffer.Length) < buffer.Length)
                return -1;


            return (int)(buffer[0] << 24 | buffer[1] << 16 | buffer[2] << 8 | buffer[3]);


        }


        private void ParseInner(FileStream stream)
        {
            int majorVersion = ReadShort(stream);
            int minorVersion = ReadShort(stream);
            int numOfTables = ReadShort(stream);


            if (majorVersion != 1 || minorVersion != 0)
            {
                return;
            }


            // jump to TableDirectory struct
            stream.Seek(12, SeekOrigin.Begin);


            bool found = false;
            byte[] buff = new byte[4];
            TableDirectory tableDirectory = new TableDirectory();
            for (int i = 0; i < numOfTables; i++)
            {
                stream.Read(buff, 0, buff.Length);
                tableDirectory.name = Encoding.Default.GetString(buff);
                tableDirectory.checkSum = ReadInt(stream);
                tableDirectory.offset = ReadInt(stream);
                tableDirectory.length = ReadInt(stream);


                if ("name".Equals(tableDirectory.name, StringComparison.CurrentCultureIgnoreCase))
                {
                    found = true;
                    break;
                }
                else if (tableDirectory.name == null || tableDirectory.name.Length == 0)
                {
                    break;
                }
            }


            // not found table of name
            if (!found)
            {
                return;
            }


            stream.Seek(tableDirectory.offset, SeekOrigin.Begin);
            NameTableHeader nameTableHeader = new NameTableHeader();
            nameTableHeader.fSelector = ReadShort(stream);
            nameTableHeader.nRCount = ReadShort(stream);
            nameTableHeader.storageOffset = ReadShort(stream);


            NameRecord nameRecord = new NameRecord();
            for (int i = 0; i < nameTableHeader.nRCount; i++)
            {
                nameRecord.platformID = ReadShort(stream);
                nameRecord.encodingID = ReadShort(stream);
                nameRecord.languageID = ReadShort(stream);
                nameRecord.nameID = ReadShort(stream);
                nameRecord.stringLength = ReadShort(stream);
                nameRecord.stringOffset = ReadShort(stream);


                long pos = stream.Position;
                byte[] bf = new byte[nameRecord.stringLength];
                long vpos = tableDirectory.offset + nameRecord.stringOffset + nameTableHeader.storageOffset;
                stream.Seek(vpos, SeekOrigin.Begin);
                stream.Read(bf, 0, bf.Length);
                string temp = Encoding.BigEndianUnicode.GetString(bf);


                if (fontProperties.ContainsKey(nameRecord.nameID))
                    fontProperties[nameRecord.nameID] = temp;
                else
                    fontProperties.Add(nameRecord.nameID, temp);
                stream.Seek(pos, SeekOrigin.Begin);
            }
        }


        public override string ToString()
        {
            return fontProperties.ToString();
        }


        private class TableDirectory
        {
            public string name; //table name
            public int checkSum; //Check sum
            public int offset; //Offset from beginning of file
            public int length; //length of the table in bytes


            public override string ToString()
            {
                return name;
            }
        }


        private class NameTableHeader
        {
            public int fSelector; //format selector. Always 0
            public int nRCount; //Name Records count
            public int storageOffset; //Offset for strings storage,
        }


        private class NameRecord
        {
            public int platformID;
            public int encodingID;
            public int languageID;
            public int nameID;
            public int stringLength;
            public int stringOffset; //from start of storage area


            public override string ToString()
            {
                return nameID.ToString();
            }
        }
    }