在java环境中有一个专门的获取ttf文件的头信息的Font类

转自:  http://blog.csdn.net/connectionutils/article/details/7837528

SNO: 测试后, 完全可以工作, 里面有例子, 完全可以使用.

 在java环境中有一个专门的获取ttf文件的头信息的Font类

      Font f = Font.createFont(Font.TRUETYPE_FONT, new FileInputStream("seguisym.ttf"));

     String name = f.getName();

     System.out.println(name);

     

    但是在android环境下,我们无法直接用到该类去解析TTF文件,下面我将附上代码来解析ttf文件

       TTFParser.java

       import java.io.IOException;

       import java.io.RandomAccessFile;

       import java.nio.charset.Charset;

       import java.util.HashMap;

       import java.util.Map;

      

       /**

         * TTF Font file parser

         * <p>

         * sample:

         * <code><pre>

         *                          File fs = new File("C:\\Windows\\Fonts");

         *                          File[] files = fs.listFiles(new FilenameFilter() {

         *                              public boolean accept(File dir, String name) {

         *                                  if (name.endsWith("ttf")){ return true;}

         *                                  return false;

         *                              }

         *                          });

         *                          for (File file : files) {

         *                              TTFParser parser = new TTFParser();

         *                              parser.parse(file.getAbsolutePath());

         *                              System.out.println("font name: " + parser.getFontName());

         *                          }

         * </pre></code>

         * <p/>

         * Copyright: Copyright (c) 12-8-6 下午3:51

         * <p/>

         * Version: 1.0

         * <p/>

         */

       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 Map<Integer, String> fontProperties = new HashMap<Integer, String>();

 

            /**

               * 获取ttf font name

               * @return

             */

           public String getFontName() {

               if (fontProperties.containsKey(FULL_FONT_NAME)) {

                   return fontProperties.get(FULL_FONT_NAME);

                } else if (fontProperties.containsKey(FAMILY_NAME)) {

                   return fontProperties.get(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.get(nameID);

              } else { return null; }

           }

           

           /**

             * 获取ttf属性集合

             * @return 属性集合(MAP)

             */

          

           public Map<Integer, String> getFontProperties() { return fontProperties; }

           

           /**

             * 执行解析

             * @param fileName ttf文件名

             * @throws IOException

             */

           public void parse(String fileName) throws IOException {

               fontProperties.clear();

               RandomAccessFile f = null;

               try {

                   f = new RandomAccessFile(fileName, "r");

                   parseInner(f);

               } finally {

                   try {

                       f.close();

                   }catch (Exception e) {

                       //ignore;

                   }

                }

           }

       

           private void parseInner(RandomAccessFile randomAccessFile) throws IOException {

                 int majorVersion = randomAccessFile.readShort();

                 int minorVersion = randomAccessFile.readShort();

                 int numOfTables = randomAccessFile.readShort();

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

 

                 //jump to TableDirectory struct

                  randomAccessFile.seek(12);

                 

                  boolean found = false;

                  byte[] buff = new byte[4];

                  TbleDirectory tableDirectory = new TableDirectory();

                  for (int i = 0; i < numOfTables; i++) {

                      randomAccessFile.read(buff);

                      tableDirectory.name = new String(buff);

                      tableDirectory.checkSum = randomAccessFile.readInt();

                      tableDirectory.offset = randomAccessFile.readInt();

                      tableDirectory.length = randomAccessFile.readInt();

                      if ("name".equalsIgnoreCase(tableDirectory.name)) {

                          found = true;

                          break;

                       }else if (tableDirectory.name == null || tableDirectory.name.length() == 0) {

                          break;

                       }

                   } 

                   

                   // not found table of name

                  if (!found) { return; }

                  randomAccessFile.seek(tableDirectory.offset);

                  NameTableHeader nameTableHeader = new NameTableHeader();

                  nameTableHeader.fSelector = randomAccessFile.readShort();

                  nameTableHeader.nRCount = randomAccessFile.readShort();

                  nameTableHeader.storageOffset = randomAccessFile.readShort();

                  NameRecord nameRecord = new NameRecord();

                  for (int i = 0; i < nameTableHeader.nRCount; i++) {

                      nameRecord.platformID = randomAccessFile.readShort();

                      nameRecord.encodingID = randomAccessFile.readShort();

                      nameRecord.languageID = randomAccessFile.readShort();

                      nameRecord.nameID = randomAccessFile.readShort();

                      nameRecord.stringLength = randomAccessFile.readShort();

                      nameRecord.stringOffset = randomAccessFile.readShort();

                      long pos = randomAccessFile.getFilePointer();

                      byte[] bf = new byte[nameRecord.stringLength];

                      long vpos = tableDirectory.offset + nameRecord.stringOffset + nameTableHeader.storageOffset;

                      randomAccessFile.seek(vpos);

                      randomAccessFile.read(bf);

                      String temp = new String(bf, Charset.forName("utf-16"));

                      fontProperties.put(nameRecord.nameID, temp);

                      randomAccessFile.seek(pos);

                  }

              }

             

              @Override

              public String toString() {

                  return fontProperties.toString();

              }

       

             private static class TableDirectory {

                  String name; //table name

                  int checkSum; //Check sum

                  int offset; //Offset from beginning of file

                  int length; //length of the table in bytes

              }

 

             private static class NameTableHeader {

                 int fSelector; //format selector. Always 0

                 int nRCount; //Name Records count

                 int storageOffset; //Offset for strings storage,

             }

 

             private static class NameRecord {

                  int platformID;

                  int encodingID;

                  int languageID;

                  int nameID;

                  int stringLength;

                  int stringOffset; //from start of storage area

             }

     }


     http://www.codeproject.com/Articles/2293/Retrieving-font-name-from-TTF-file          这边有文件结构的介绍及c的实现。

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