Java解析truetype字体提取每个字符作为图像&它的代码 [英] Java parsing truetype font to extract each characters as image & its code

问题描述

有没有可用于从真正的字体（.ttf）中提取每个字符的java库？

字体的每个字符，我想：
$ b

1. 将其转换为图像
   
2. 提取其代码（例如：Unicode值）
li>

任何人都可以帮助向我展示上述目的的一些提示吗？

我想弄清楚，这样的应用程序是如何制作的： http：//www.softpedia .com / progScreenshots / CharMap-Screenshot-94863.html

解决方案这将转换 String 添加到 BufferedImage ：

  public BufferedImage stringToBufferedImage（String s）{
 //首先，我们必须计算字符串的宽度和高度
 
 BufferedImage img = new BufferedImage（1， BufferedImage.TYPE_4BYTE_ABGR）; 
图形g = img.getGraphics（）; 
 
 //设置绘制字符串时使用的字体
 Font f = new Font（Tahoma，Font.PLAIN，48）; 
 g.setFont（f）; 
 
 //获取字符串可视范围
 FontRenderContext frc = g.getFontMetrics（）。getFontRenderContext（）; 
 Rectangle2D rect = f.getStringBounds（s，frc）; 
 //释放资源
 g.dispose（）; 
 
 //然后，我们必须在最后的图像上绘制字符串
 
 //创建一个新的图像在哪里打印字符
 img = new BufferedImage （int）Math.ceil（rect.getWidth（）），（int）Math.ceil（rect.getHeight（）），BufferedImage.TYPE_4BYTE_ABGR）; 
 g = img.getGraphics（）; 
 g.setColor（Color.black）; //否则文本将是白色
 g.setFont（f）; 
 
 //计算该字符串的x和y 
 FontMetrics fm = g.getFontMetrics（）; 
 int x = 0; 
 int y = fm.getAscent（）; // getAscent（）=基线
 g.drawString（s，x，y）; 
 
 //释放资源
 g.dispose（）; 
 
 //返回图片
 return img; 
} 
  

我认为没有办法得到所有的字符，创建一个字符串或者一个 char 数组，存储所有要转换为图像的字符。

使用所有键对 String 或 char [] 你想转换，你可以很容易地迭代它，并转换调用 stringToBufferedImage 方法，那么你可以做$ /
$ b $前一类=lang-java prettyprint-override> int charCode =（int）charactersMap.charAt（counter）;


如果 charactersMap 是 String 或

  int charCode =（int）charactersMap [计数器]; 
  

如果 charactersMap 是 char array

希望这有助于

Is there any java library that can be used to extract each character from a true type font (.ttf)?

Each character of the font, I want to:

1. Convert it to the image
2. Extract its code (ex: Unicode value)

Anyone can help to show me some tips on above purpose?

P.S: I want to figure out, how such this app made: http://www.softpedia.com/progScreenshots/CharMap-Screenshot-94863.html

解决方案

This will convert a String to a BufferedImage:

public BufferedImage stringToBufferedImage(String s) {
    //First, we have to calculate the string's width and height

    BufferedImage img = new BufferedImage(1, 1, BufferedImage.TYPE_4BYTE_ABGR);
    Graphics g = img.getGraphics();

    //Set the font to be used when drawing the string
    Font f = new Font("Tahoma", Font.PLAIN, 48);
    g.setFont(f);

    //Get the string visual bounds
    FontRenderContext frc = g.getFontMetrics().getFontRenderContext();
    Rectangle2D rect = f.getStringBounds(s, frc);
    //Release resources
    g.dispose();

    //Then, we have to draw the string on the final image

    //Create a new image where to print the character
    img = new BufferedImage((int) Math.ceil(rect.getWidth()), (int) Math.ceil(rect.getHeight()), BufferedImage.TYPE_4BYTE_ABGR);
    g = img.getGraphics();
    g.setColor(Color.black); //Otherwise the text would be white
    g.setFont(f);

    //Calculate x and y for that string
    FontMetrics fm = g.getFontMetrics();
    int x = 0;
    int y = fm.getAscent(); //getAscent() = baseline
    g.drawString(s, x, y);

    //Release resources
    g.dispose();

    //Return the image
    return img;
}

I think there isn't a way to get all the characters, you have to create a String or a char array where you store all the chars you want to convert to image.

Once you have the String or char[] with all keys you want to convert, you can easily iterate over it and convert call the stringToBufferedImage method, then you can do

int charCode = (int) charactersMap.charAt(counter);

if charactersMap is a String, or

int charCode = (int) charactersMap[counter];

if charactersMap is a char array

Hope this helps

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