org.apache.pdfbox.pdmodel.font.PDType3CharProc Java Examples

/**
     * <a href="http://stackoverflow.com/questions/42032729/render-type3-font-character-as-image-using-pdfbox">
     * Render Type3 font character as image using PDFBox
     * </a>
     * <br/>
     * <a href="https://drive.google.com/file/d/0B0f6X4SAMh2KRDJTbm4tb3E1a1U/view">
     * 4700198773.pdf
     * </a>
     * from
     * <a href="http://stackoverflow.com/questions/37754112/extract-text-with-custom-font-result-non-readble">
     * extract text with custom font result non readble
     * </a>
     * <p>
     * This test shows how one can render individual Type 3 font glyphs as bitmaps.
     * Unfortunately PDFBox out-of-the-box does not provide a class to render contents
     * of arbitrary XObjects, merely for rendering pages; thus, we simply create a page
     * with the glyph in question and render that page.   
     * </p>
     * <p>
     * As the OP did not provide a sample PDF, we simply use one from another
     * stackoverflow question. There obviously might remain issues with the
     * OP's files.
     * </p>
     */
    @Test
    public void testRender4700198773() throws IOException, NoSuchMethodException, SecurityException, IllegalAccessException, IllegalArgumentException, InvocationTargetException
    {
        Method PDPageContentStreamWrite = PDPageContentStream.class.getSuperclass().getDeclaredMethod("write", String.class);
        PDPageContentStreamWrite.setAccessible(true);

        try (   InputStream resource = getClass().getResourceAsStream("4700198773.pdf"))
        {
            PDDocument document = Loader.loadPDF(resource);

            PDPage page = document.getPage(0);
            PDResources pageResources = page.getResources();
            COSName f1Name = COSName.getPDFName("F1");
            PDType3Font fontF1 = (PDType3Font) pageResources.getFont(f1Name);
            Map<String, Integer> f1NameToCode = fontF1.getEncoding().getNameToCodeMap();

            COSDictionary charProcsDictionary = fontF1.getCharProcs();
            for (COSName key : charProcsDictionary.keySet())
            {
                COSStream stream = (COSStream) charProcsDictionary.getDictionaryObject(key);
                PDType3CharProc charProc = new PDType3CharProc(fontF1, stream);
                PDRectangle bbox = charProc.getGlyphBBox();
                if (bbox == null)
                    bbox = charProc.getBBox();
                Integer code = f1NameToCode.get(key.getName());

                if (code != null)
                {
                    PDDocument charDocument = new PDDocument();
                    PDPage charPage = new PDPage(bbox);
                    charDocument.addPage(charPage);
                    charPage.setResources(pageResources);
                    PDPageContentStream charContentStream = new PDPageContentStream(charDocument, charPage);
                    charContentStream.beginText();
                    charContentStream.setFont(fontF1, bbox.getHeight());
//                    charContentStream.write(String.format("<%2X> Tj\n", code).getBytes());
                    PDPageContentStreamWrite.invoke(charContentStream, String.format("<%2X> Tj\n", code));
                    charContentStream.endText();
                    charContentStream.close();

                    File result = new File(RESULT_FOLDER, String.format("4700198773-%s-%s.png", key.getName(), code));
                    PDFRenderer renderer = new PDFRenderer(charDocument);
                    BufferedImage image = renderer.renderImageWithDPI(0, 96);
                    ImageIO.write(image, "PNG", result);
                    charDocument.save(new File(RESULT_FOLDER, String.format("4700198773-%s-%s.pdf", key.getName(), code)));
                    charDocument.close();
                }
            }
        }
    }
 

/**
 * <a href="http://stackoverflow.com/questions/42032729/render-type3-font-character-as-image-using-pdfbox">
 * Render Type3 font character as image using PDFBox
 * </a>
 * <br/>
 * <a href="https://drive.google.com/file/d/0B0f6X4SAMh2KRDJTbm4tb3E1a1U/view">
 * 4700198773.pdf
 * </a>
 * from
 * <a href="http://stackoverflow.com/questions/37754112/extract-text-with-custom-font-result-non-readble">
 * extract text with custom font result non readble
 * </a>
 * <p>
 * This test shows how one can render individual Type 3 font glyphs as bitmaps.
 * Unfortunately PDFBox out-of-the-box does not provide a class to render contents
 * of arbitrary XObjects, merely for rendering pages; thus, we simply create a page
 * with the glyph in question and render that page.   
 * </p>
 * <p>
 * As the OP did not provide a sample PDF, we simply use one from another
 * stackoverflow question. There obviously might remain issues with the
 * OP's files.
 * </p>
 */
@Test
public void testRenderSdnList() throws IOException, IllegalAccessException, IllegalArgumentException, InvocationTargetException, NoSuchMethodException, SecurityException
{
    Method PDPageContentStreamWrite = PDPageContentStream.class.getSuperclass().getDeclaredMethod("write", String.class);
    PDPageContentStreamWrite.setAccessible(true);

    try (   InputStream resource = getClass().getResourceAsStream("sdnlist.pdf"))
    {
        PDDocument document = Loader.loadPDF(resource);

        PDPage page = document.getPage(1);
        PDResources pageResources = page.getResources();
        COSName f1Name = COSName.getPDFName("R144");
        PDType3Font fontF1 = (PDType3Font) pageResources.getFont(f1Name);
        Map<String, Integer> f1NameToCode = fontF1.getEncoding().getNameToCodeMap();

        COSDictionary charProcsDictionary = fontF1.getCharProcs();
        for (COSName key : charProcsDictionary.keySet())
        {
            COSStream stream = (COSStream) charProcsDictionary.getDictionaryObject(key);
            PDType3CharProc charProc = new PDType3CharProc(fontF1, stream);
            PDRectangle bbox = charProc.getGlyphBBox();
            if (bbox == null)
                bbox = charProc.getBBox();
            Integer code = f1NameToCode.get(key.getName());

            if (code != null)
            {
                PDDocument charDocument = new PDDocument();
                PDPage charPage = new PDPage(bbox);
                charDocument.addPage(charPage);
                charPage.setResources(pageResources);
                PDPageContentStream charContentStream = new PDPageContentStream(charDocument, charPage);
                charContentStream.beginText();
                charContentStream.setFont(fontF1, bbox.getHeight());
                //charContentStream.getOutputStream().write(String.format("<%2X> Tj\n", code).getBytes());
                PDPageContentStreamWrite.invoke(charContentStream, String.format("<%2X> Tj\n", code));
                charContentStream.endText();
                charContentStream.close();

                File result = new File(RESULT_FOLDER, String.format("sdnlist-%s-%s.png", key.getName(), code));
                PDFRenderer renderer = new PDFRenderer(charDocument);
                BufferedImage image = renderer.renderImageWithDPI(0, 96);
                ImageIO.write(image, "PNG", result);
                charDocument.save(new File(RESULT_FOLDER, String.format("sdnlist-%s-%s.pdf", key.getName(), code)));
                charDocument.close();
            }
        }
    }
}
 

/**
 * Called when a glyph is to be processed.This method is intended for overriding in subclasses,
 * the default implementation does nothing.
 *
 * @param textRenderingMatrix the current text rendering matrix, T<sub>rm</sub>
 * @param font the current font
 * @param code internal PDF character code for the glyph
 * @param unicode the Unicode text for this glyph, or null if the PDF does provide it
 * @param displacement the displacement (i.e. advance) of the glyph in text space
 * @throws IOException if the glyph cannot be processed
 */
protected void showType3Glyph(Matrix textRenderingMatrix, PDType3Font font, int code,
                              String unicode, Vector displacement) throws IOException
{
    PDType3CharProc charProc = font.getCharProc(code);
    if (charProc != null)
    {
        processType3Stream(charProc, textRenderingMatrix);
    }
}