java

关注公众号 jb51net

关闭
首页 > 软件编程 > java > Java解析ttf字体的信息

Java全面解析ttf字体的信息

作者:念九_ysl

文章介绍了Java如何解析TTF字体文件,提取字体的基本信息、版本信息、版权和许可证、字符映射以及各种表格信息,通过代码解析,可以获取字体的详细描述和度量数据

Java解析ttf字体的信息

TTF(TrueType Font)文件格式复杂,包含了多个表格,每个表格存储了不同的字体信息。

前提是ttf要包含这些表格信息。

通过代码解析 TTF 文件,你可以获取以下内容:

public static final int COPYRIGHT = 0; // 版权信息
public static final int FAMILY_NAME = 1; // 字体家族名称
public static final int FONT_SUBFAMILY_NAME = 2; // 字体子家族名称(例如:粗体、斜体等)
public static final int UNIQUE_FONT_IDENTIFIER = 3; // 唯一字体标识符
public static final int FULL_FONT_NAME = 4; // 完整字体名称
public static final int VERSION = 5; // 字体版本信息
public static final int POSTSCRIPT_NAME = 6; // PostScript名称
public static final int TRADEMARK = 7; // 商标信息
public static final int MANUFACTURER = 8; // 制造商信息
public static final int DESIGNER = 9; // 设计师信息
public static final int DESCRIPTION = 10; // 字体描述
public static final int URL_VENDOR = 11; // 制造商的URL
public static final int URL_DESIGNER = 12; // 设计师的URL
public static final int LICENSE_DESCRIPTION = 13; // 授权描述
public static final int LICENSE_INFO_URL = 14; // 授权信息的URL  

以下是数据示例:

{0=Digitized data copyright © 2007, Google Corporation., 1=Droid Sans
Mono, 2=Regular, 3=Ascender - Droid Sans Mono, 4=Droid Sans Mono,
5=Version 1.00 build 113, 6=DroidSansMono, 7=Droid is a trademark of
Google and may be registered in certain jurisdictions., 8=Ascender
Corporation, 10=Droid Sans is a humanist sans serif typeface
designed for user interfaces and electronic communication.,
11=http://www.ascendercorp.com/,
12=http://www.ascendercorp.com/typedesigners.html, 13=Licensed under
the Apache License, Version 2.0,
14=http://www.apache.org/licenses/LICENSE-2.0, 18=䑲潩搠卡湳⁍潮�}

{0=Copyright 上海字魂网络科技有限公司, 1=字魂再见怪兽体(商用需授权), 2=Regular, 3=ZHZJGST_T,
4=字魂再见怪兽体(商用需授权), 5=Version 2.00, 6=ZHZJGST_T, 7=字魂 ®,
8=上海字魂网络科技有限公司, 9=字魂网, 10=字魂联名系列, 11=https://izihun.com/,
12=https://izihun.com/, 13=商用需购买授权,请访问: https://izihun.com/,
16=字魂再见怪兽体(商用需授权), 17=常规体} {0=Digitized data copyright © 2007,
Google Corporation., 1=Droid Sans Mono, 2=Regular, 3=Ascender -
Droid Sans Mono, 4=Droid Sans Mono, 5=Version 1.00 build 113,
6=DroidSansMono, 7=Droid is a trademark of Google and may be
registered in certain jurisdictions., 8=Ascender Corporation,
10=Droid Sans is a humanist sans serif typeface designed for user
interfaces and electronic communication.,
11=http://www.ascendercorp.com/,
12=http://www.ascendercorp.com/typedesigners.html, 13=Licensed under
the Apache License, Version 2.0,
14=http://www.apache.org/licenses/LICENSE-2.0, 18=䑲潩搠卡湳⁍潮�}

1.基本信息:

2.字符映射:

3.表格信息:

4.度量信息:

5.表格详情:

6.额外的表格:

代码解析示例

1.建立工具类

package com.example.psd.font;

import java.io.IOException;
import java.io.RandomAccessFile;
import java.nio.charset.StandardCharsets;
import java.util.HashMap;
import java.util.Map;

/**
 * TTF 字体文件解析器
 */
public class TTFParser {

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

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

    /**
     * 获取全字体名称,如果不可用则获取字体家族名称。
     *
     * @return 字体名称
     */
    public String getFontName() {
        return fontProperties.getOrDefault(FULL_FONT_NAME, fontProperties.get(FAMILY_NAME));
    }

    /**
     * 获取特定的字体属性。
     *
     * @param nameID 属性 ID
     * @return 属性值
     */
    public String getFontProperty(int nameID) {
        return fontProperties.get(nameID);
    }

    /**
     * 获取所有字体属性。
     *
     * @return 字体属性映射
     */
    public Map<Integer, String> getFontProperties() {
        return fontProperties;
    }

    /**
     * 解析 TTF 文件并提取字体属性。
     *
     * @param fileName TTF 文件路径
     * @throws IOException 如果发生 I/O 错误
     */
    public void parse(String fileName) throws IOException {
        fontProperties.clear();
        try (RandomAccessFile raf = new RandomAccessFile(fileName, "r")) {
            parseInner(raf);
        }
    }

    private void parseInner(RandomAccessFile raf) throws IOException {
        int majorVersion = raf.readUnsignedShort();
        int minorVersion = raf.readUnsignedShort();
        int numOfTables = raf.readUnsignedShort();

        if (majorVersion != 1 || minorVersion != 0) {
            return; // 不支持的版本
        }

        // 跳到表目录
        raf.seek(12); // 跳过版本信息和表数

        boolean found = false;
        TableDirectory tableDirectory = new TableDirectory();

        for (int i = 0; i < numOfTables; i++) {
            byte[] nameBytes = new byte[4];
            raf.readFully(nameBytes);
            tableDirectory.name = new String(nameBytes, StandardCharsets.ISO_8859_1);
            tableDirectory.checkSum = raf.readInt();
            tableDirectory.offset = raf.readInt();
            tableDirectory.length = raf.readInt();

            if ("name".equalsIgnoreCase(tableDirectory.name)) {
                found = true;
                break;
            }
        }

        if (!found) {
            return; // 未找到 'name' 表
        }

        raf.seek(tableDirectory.offset);
        NameTableHeader nameTableHeader = new NameTableHeader();
        nameTableHeader.fSelector = raf.readUnsignedShort();
        nameTableHeader.nRCount = raf.readUnsignedShort();
        nameTableHeader.storageOffset = raf.readUnsignedShort();

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

            long pos = raf.getFilePointer();
            raf.seek(tableDirectory.offset + nameRecord.stringOffset + nameTableHeader.storageOffset);
            byte[] bf = new byte[nameRecord.stringLength];
            raf.readFully(bf);
            String value = new String(bf, StandardCharsets.UTF_16);
            fontProperties.put(nameRecord.nameID, value);
            // 打印出可能的授权信息
            if (nameRecord.nameID == TTFParser.COPYRIGHT || nameRecord.nameID == TTFParser.LICENSE_DESCRIPTION) {
                System.out.println("Found information: " + value);
                System.out.println();
            }
            raf.seek(pos);
        }
    }

    /**
     * 检查字体文件中是否包含版权声明。
     *
     * @return 如果找到版权声明,返回 true;否则返回 false
     */
    public boolean hasCopyrightInfo() {
        return fontProperties.containsKey(COPYRIGHT);
    }

    /**
     * 检查字体文件中是否包含商用授权信息。
     *
     * @return 返回一个包含两个布尔值的数组,第一个表示是否允许商用,第二个表示是否需要授权。
     */
    public boolean[] checkCommercialUseAndAuthorization() {
        boolean isCommercialUseAllowed = false;
        boolean isAuthorizationRequired = false;

        String licenseDescription = fontProperties.get(LICENSE_DESCRIPTION);
        if (licenseDescription != null) {
            // 解析 licenseDescription 中的关键词来判断
            String descriptionLower = licenseDescription.toLowerCase();
            if (descriptionLower.contains("commercial use allowed")) {
                isCommercialUseAllowed = true;
            }
            if (descriptionLower.contains("authorization required")) {
                isAuthorizationRequired = true;
            }
        }

        String licenseInfoURL = fontProperties.get(LICENSE_INFO_URL);
        System.out.println("============111111" + fontProperties);
        if (licenseInfoURL != null) {
            // 可以通过访问此URL来确认授权信息
            System.out.println("检查授权信息,请访问: " + licenseInfoURL);
            // 假设如果有 URL 说明需要进一步确认授权
            isAuthorizationRequired = true;
        }

        return new boolean[]{isCommercialUseAllowed, isAuthorizationRequired};
    }

    @Override
    public String toString() {
        return fontProperties.toString();
    }

    private static class TableDirectory {
        String name;
        int checkSum;
        int offset;
        int length;
    }

    private static class NameTableHeader {
        int fSelector;
        int nRCount;
        int storageOffset;
    }

    private static class NameRecord {
        int platformID;
        int encodingID;
        int languageID;
        int nameID;
        int stringLength;
        int stringOffset;
    }
}

2.demo

package com.example.psd.font;

import com.example.psd.font.TTFParser;

import java.io.File;
import java.io.FilenameFilter;

public class TTFParserExample {

    public static void main(String[] args) {
        // 指定 TTF 文件所在目录
        File fontDir = new File("D:\\测试");

        // 列出目录中的所有 TTF 文件
        File[] files = fontDir.listFiles(new FilenameFilter() {
            @Override
            public boolean accept(File dir, String name) {
                return name.endsWith(".ttf");
            }
        });

        // 处理每个 TTF 文件
        if (files != null) {
            for (File file : files) {
                TTFParser parser = new TTFParser();
                try {
                    parser.parse(file.getAbsolutePath());
                    // 获取并打印字体名称
                    String fontName = parser.getFontName();
                    System.out.println("Font name: " + fontName);

                    // 如果需要获取其他属性,可以使用类似的方式
                    String familyName = parser.getFontProperty(TTFParser.FAMILY_NAME);
                    System.out.println("Family name: " + familyName);
                } catch (Exception e) {
                    System.err.println("Error parsing font file: " + file.getAbsolutePath());
                    e.printStackTrace();
                }
            }
        } else {
            System.out.println("No TTF files found in the specified directory.");
        }
    }
}

总结

以上为个人经验,希望能给大家一个参考,也希望大家多多支持脚本之家。

您可能感兴趣的文章:
阅读全文