[PDFBOX-5140] Can't change PDF including some Chinese font to JPG correctly

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Duplicate
• Affects Version/s: 2.0.22
• Component/s: Rendering
• Environment: Windows 10
• Assignee: Unassigned
• Reporter: Shigeru Okada
• Created: 25/Mar/21 07:25
• Updated: 11/Apr/21 09:10
• Resolved: 11/Apr/21 09:10

Description

I tried to change PDF file including Chinese font to JPG file.
Source code is as below.

	private List<String> convertPdf2Jpg(File pdfFile) {

		List<String> jpgList = new ArrayList<String>();

		try {
			PDDocument document = PDDocument.load(pdfFile);
			PDFRenderer pdfRenderer = new PDFRenderer(document);
			for (int i = 0; i < document.getNumberOfPages(); i++) {
				BufferedImage image = null;
				try{
					image = pdfRenderer.renderImageWithDPI(i, 300 ,ImageType.RGB);
					String jpgName = pdfFile.getPath().split(".pdf")[0] + "_" + String.format("%03d", i+1) +  ".jpg";
					ImageIOUtil.writeImage(image, jpgName, 300);
					jpgList.add(jpgName);
				}
				catch(Exception e) {
					document.close();
					LOG.error(pdfFile + "(" + i + " page) " + " can't convert pdf to jpg file (convertPdf2Jpg())." + e.toString());
					throwPdfBoxException("convertPdf2Jpg():" +  pdfFile + "(" + i + " page) " + " can't convert pdf to jpg file." + e.toString());
				}
			}
			document.close();
		}
		catch(Exception e){
			LOG.error(pdfFile + "Can't load PDF file (convertPdf2Jpg()).");
		}
		return jpgList;
	}

I attached example of PDF and JPG. Chinese characters are broken.
It seems that it depends on font.
If you need more information, please let me know.

Thanks

//Okada

Issue Links

• duplicates: PDFBOX-3293 Chinese font glyphs with overlapping paths not rendered correctly