从Java中TTF文件加载一些TrueType字体引起FontFormatException此：字体名称未找到 [英] Loading some TrueType Font from TTF file in Java causes FontFormatException: Font name not found

问题描述

我试图从我的系统上的文件TTF创建java.awt.Font中的实例，但只有一些字体能够无差错加载。下面的code是一些测试code我在网上找到。当我的系统上运行，它能够成功（例如ARIAL.TTF）装载285字体，但未能上83字体（例如AmericanTypewriter.ttf）。

I am attempting to create a java.awt.Font instance from a TTF file on my system, but only some fonts are able to load without error. The code below is some test code I found online. When run on my system, it is able to load 285 fonts successfully (ex. Arial.ttf), but fails on 83 fonts, (ex. AmericanTypewriter.ttf).

所有错误的形式是 FontFormatException此：字体名称找不到没有嵌入事业

All errors are of the form FontFormatException: Font name not found with no embedded cause.

是否有与java.awt.Font中和格式兼容性已知问题？谷歌搜索多后，我无法找到任何东西。

Are there known issues with java.awt.Font and format compatibility? I can't find anything after much Googling.

public static void main(String[] args) {
        String rootPath = "/Library/Fonts";

        File root = new File(rootPath);
        if (root.canRead()) {
            String[] fontFiles = root.list();

            Font font = null;
            for (String fontFile : fontFiles) {
                try {
                    System.out.println(fontFile);
                    font = Font.createFont(Font.TRUETYPE_FONT, new File(root + "/" + fontFile));
                    System.out.println(font);
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        }
    }

我的环境是Java 7中，OS X小牛（10.9.1）。

My environment is Java 7, OS X Mavericks (10.9.1).

java version "1.7.0_40"
Java(TM) SE Runtime Environment (build 1.7.0_40-b43)
Java HotSpot(TM) 64-Bit Server VM (build 24.0-b56, mixed mode)

在这里任何帮助将大大AP preciated。

Any help here would be greatly appreciated.

推荐答案

确定，因此一些挖后，事实证明，这个问题是由于一个bug（功能！）在java.awt实施。也就是说，加载物理TrueType字体如果字体文件的名称表不包括姓和全名的记录失败。

OK, so after some digging, it turns out that this problem is due to a bug (feature!) in the java.awt implementation. Namely, loading a physical TrueType font fails if the font file's name table does not include family name and full name records.

要找出问题所在，我用grep的code到从OpenJDK的的AWT执行相关的异常落后的追查。有一次，我发现了名称表的问题，我用 TTX ，一个没有廉价的TrueType元数据编辑器来添加名称条目的Java查找。例如：

To identify the problem, I used GrepCode to trace backward from the relevant exception in OpenJDK's AWT implementation. Once I had discovered the name table issue, I used ttx, a no-frills TrueType metadata editor to add the name entries Java looks for. Ex:

<namerecord nameID="1" platformID="3" platEncID="1" langID="0x409">
  American Typewriter
</namerecord>
<namerecord nameID="4" platformID="3" platEncID="1" langID="0x409">
  American Typewriter
</namerecord>

由河豚毒素产生新的TTF文件可能现在的Java打开。耶！

The new TTF files generated by ttx could now be opened by Java. Yay!

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