java如何使用嵌入式字体调用Graphics2D。抽绳（…）使用iText（DefaultFontMapper？）

Question

要生成有效的PDF/X文档，必须嵌入所有字体。不知何故，我不可能在Graphics2D环境中使用这些字体

此Unittests显示了问题（注释行是我进行的一些测试）：

import java.awt.Font;
import java.awt.Graphics2D;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.PrintStream;
import java.util.Map.Entry;

import org.junit.Test;

import com.itextpdf.awt.DefaultFontMapper;
import com.itextpdf.awt.DefaultFontMapper.BaseFontParameters;
import com.itextpdf.awt.PdfGraphics2D;
import com.itextpdf.text.Document;
import com.itextpdf.text.DocumentException;
import com.itextpdf.text.Rectangle;
import com.itextpdf.text.pdf.PdfWriter;

public class TestFont
{

    @Test
    public void shouldBeAbleToAddFountsAndDrawOnCanvas() throws FileNotFoundException, DocumentException
    {
        final DefaultFontMapper mapper = new DefaultFontMapper();
        mapper.insertDirectory(".");

        final PrintStream out2 = new PrintStream(System.out);
        for (final Entry<String, BaseFontParameters> entry : mapper.getMapper().entrySet())
        {
            out2.println(String.format("%s: %s", entry.getKey(), entry.getValue().fontName));
        }
        out2.flush();

        final float width = 150;
        final float height = 150;

        final Document document = new Document(new Rectangle(width, height));
        final PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream("fonts.pdf"));
        writer.setPDFXConformance(PdfWriter.PDFX32002);

        document.open();
        final Graphics2D g2d = new PdfGraphics2D(writer.getDirectContent(), width, height, mapper);

        g2d.setFont(new Font("Comicate", Font.PLAIN, 12));

        g2d.drawString("Hello world", 5, 24);

        g2d.dispose();

        document.close();
    }

}

它将抛出一个带有消息的PdfXConformanceException：“所有字体都必须嵌入。这个不是：Helvetica

我已经浏览了PdfGraphics2D类来检查setFont()实现，发现将使用FontMapper。我已经在上面的单元测试中添加了这个

public void setFont(Font f) {
    if (f == null)
        return;
    if (onlyShapes) {
        font = f;
        return;
    }
    if (f == font)
        return;
    font = f;
    fontSize = f.getSize2D();
    baseFont = getCachedBaseFont(f);
}

private BaseFont getCachedBaseFont(Font f) {
    synchronized (baseFonts) {
        BaseFont bf = (BaseFont)baseFonts.get(f.getFontName());
        if (bf == null) {
            bf = fontMapper.awtToPdf(f);
            baseFonts.put(f.getFontName(), bf);
        }
        return bf;
    }
}

Unittest基于iText-in-Action手册中的this exampleHere是有关FontMapper的其他一些示例

要运行Unittest，您需要此依赖项：

<dependency>
    <groupId>com.itextpdf</groupId>
    <artifactId>itextpdf</artifactId>
    <version>5.3.2</version>
</dependency>

自定义字体（位于“.”中）你会发现here

控制台输出向我显示以下内容（以标识fontName）：

Comicate: ./COMICATE.TTF

Answer 1

通过定义新的BaseFont并实现FontMapper（）的接口>&燃气轮机&燃气轮机；public BaseFont awtToPdf（java.awt.Font）。这将应用awt。嵌入到pdf中的字体

在下面的示例中，我“print”g2D（包括“drawString”方法），在外部类中绘制。结果仅导出带有嵌入式“ArialMT”和“Arial BoldMT”字体的矢量pdf

preview img

    PdfWriter pdfWriter = null;
    try {
        pdfWriter = PdfWriter.getInstance(document, new FileOutputStream(file));
        document.open();
        BaseFont fontRegular = BaseFont.createFont("C:\\Windows\\Fonts\\arial_0.ttf", "Cp1251", BaseFont.EMBEDDED);
        BaseFont fontBold = BaseFont.createFont("C:\\Windows\\Fonts\\arialbd_0.ttf", "Cp1251", BaseFont.EMBEDDED);
        FontMapper fontMapper = new FontMapper() {

            @Override
            public java.awt.Font pdfToAwt(BaseFont arg0, int arg1) {
                // TODO Auto-generated method stub
                return null;
            }

            @Override
            public BaseFont awtToPdf(java.awt.Font font) {
                if (font.equals(Fonts.getFontRegular10()) || font.equals(Fonts.getFontRegular12())){
                    return fontRegular;
                }
                else {
                    return fontBold;
                }
            }
        };
        PdfContentByte cb = pdfWriter.getDirectContent();
        PdfTemplate template = cb.createTemplate(MainFrame.getFRAME_WIDTH(), MainFrame.getFRAME_HEIGHT());
        Graphics2D g2D = new PdfGraphics2D(template, MainFrame.getFRAME_WIDTH(), MainFrame.getFRAME_HEIGHT(), fontMapper);
        MainFrame.getPanel().print(g2D);
        g2D.dispose();
        cb.addTemplate(template, 0, 0);
    }
    catch (Exception e1) {
        e1.printStackTrace();
    }
    finally {
        document.close();
    }

Answer 2

我不确定纠正代码中错误的确切方法，但有一些简单的解决方法：

解决方法1）创建一个BuffereImage来执行所有图形绘制。然后，您可以使用所有正常的java.awt.Graphics函数，如drawString和setColor，而不考虑iText，完成后只需将图像绘制到PDF。警告：缩放时文本质量不高，但以下是一个示例：

//create doccument and writer    
Rectangle pagesize = new Rectangle(200, 100);
Document document= new Document(pagesize);
PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream("C:\\sample.pdf"));

BufferedImage bf = new BufferedImage(BorderWidth, BorderHeight, BorderWidth);
//Do all graphics code here, draw strings and images etc
    //Some code to set font (java.awt.Font)
    //Some code to draw string
    //Some code to draw image?

//Convert BufferedImage to Image
Image img = (Image)bf;
//draw image to PDF using writer
writer.getDirectContentUnder().addImage(img);

解决方法2）这使用iText功能绘制字符串，无需创建任何图形对象，字体通过使用BaseFont处理，如下所示：

//create doccument and writer    
Rectangle pagesize = new Rectangle(200, 100);
Document document= new Document(pagesize);
PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream("C:\\sample.pdf"));

document.open();
//This sample uses the "GOTHIC.TTF" font file located in the "Template" package
BaseFont bf = BaseFont.createFont(GUI.class.getClass().getResource("/Template/GOTHIC.TTF") + "", BaseFont.WINANSI, BaseFont.EMBEDDED);

//set font type, size and color
Font font = new Font(bf, 13.5f);

PdfContentByte canvas = writer.getDirectContent();

canvas.beginText();
canvas.setFontAndSize(bf, 10);
//Method Usage: showTextAligned(Align, String, x, y, rotation);
canvas.showTextAligned(Element.ALIGN_TOP, "My Text Here", 75, 40, 0);
canvas.endText();

document.close();

我知道这并没有给出你想要的答案，但是如果你只是画了一小段文字，那么变通方法2很好，我以前使用过类似于变通方法2的东西。如果这没有帮助，那么我相信布鲁诺会有答案的