how to add unicode in truetype0font on pdfbox 2.0.0?

Solution 1:

Here's some code to add a ToUnicode CMap stream in a font. Obviously I can't do it with your file, so I used one of my test files, which can be found here. I had to work on each entry separately and didn't do all. However the result is good enough to extract the first word in the green print ("Bedingungen").

The scenario is somewhat tailored to you:

• Identity-H entry
• no ToUnicode entry

• specific font name

  try (PDDocument doc = PDDocument.load(f))
  {
      for (int p = 0; p < doc.getNumberOfPages(); ++p)
      {
          PDPage page = doc.getPage(p);
          PDResources res = page.getResources();
          for (COSName fontName : res.getFontNames())
          {
              PDFont font = res.getFont(fontName);
              COSBase encoding = font.getCOSObject().getDictionaryObject(COSName.ENCODING);
              if (!COSName.IDENTITY_H.equals(encoding))
              {
                  continue;
              }
              // get real name
              String fname = font.getName();
              int plus = fname.indexOf('+');
              if (plus != -1)
              {
                  fname = fname.substring(plus + 1);
              }
              if (font.getCOSObject().containsKey(COSName.TO_UNICODE))
              {
                  continue;
              }
              System.out.println("File '" + f.getName() + "', page " + (p + 1) + ", " + fontName.getName() + ", " + font.getName());
              if (!fname.startsWith("Calibri-Bold"))
              {
                  continue;
              }
              COSStream toUnicodeStream = new COSStream();
              try (PrintWriter pw = new PrintWriter(toUnicodeStream.createOutputStream(COSName.FLATE_DECODE)))
              {
                  // "9.10 Extraction of Text Content" in the PDF 32000 specification
                  pw.println ("/CIDInit /ProcSet findresource begin\n" +
                          "12 dict begin\n" +
                          "begincmap\n" +
                          "/CIDSystemInfo\n" +
                          "<< /Registry (Adobe)\n" +
                          "/Ordering (UCS) /Supplement 0 >> def\n" +
                          "/CMapName /Adobe-Identity-UCS def\n" +
                          "/CMapType 2 def\n" +
                          "1 begincodespacerange\n" +
                          "<0000> <FFFF>\n" +
                          "endcodespacerange\n" +
                          "10 beginbfchar\n" + // number is count of entries
                          "<0001><0020>\n" + // space
                          "<0002><0041>\n" + // A
                          "<0003><0042>\n" + // B
                          "<0004><0044>\n" + // D
                          "<0013><0065>\n" + // e
                          "<0012><0064>\n" + // d
                          "<0017><0069>\n" + // i
                          "<001B><006E>\n" + // n
                          "<0015><0067>\n" + // g
                          "<0020><0075>\n" + // u
                          "endbfchar\n" +
                          "endcmap CMapName currentdict /CMap defineresource pop end end");
              }
              font.getCOSObject().setItem(COSName.TO_UNICODE, toUnicodeStream);
          }
      }
      doc.save("huhu.pdf");
  }
  

Btw the unreleased 2.1 version of PDFDebugger has some improved features to show fonts, you can get it here:

You can use it to verify that your ToUnicode CMap makes sense. Here's what I get with my changes: