[jira] [Created] (PDFBOX-4815) Gray background preview becomes black squares

["Pascal Huynh (Jira)" <ji...@apache.org>]

Pascal Huynh created PDFBOX-4815:
------------------------------------

             Summary: Gray background preview becomes black squares
                 Key: PDFBOX-4815
                 URL: https://issues.apache.org/jira/browse/PDFBOX-4815
             Project: PDFBox
          Issue Type: Bug
          Components: Rendering
    Affects Versions: 2.0.16
            Reporter: Pascal Huynh
         Attachments: payslip.pdf, preview.png

Hello, I have an issue with a PDF with gray background in some parts. This gray background becomes multiple black squares when trying to preview the document.

Analyzing images extracted from the pdf, it appears the gray background is not a plain gray background but more a set of gray and black pixels.

Is there a way to handle this kind of background  for the preview and have the same visual rendering than the pdf?

Source code : 
{code:java}
@Test
public void shouldPreview() throws IOException {
    String source = "payslip.pdf";
    String result = "preview.png";

    try (InputStream buffered = new BufferedInputStream(new FileInputStream(new File(source)));
         PDDocument doc = PDDocument.load(buffered, MemoryUsageSetting.setupMixed( 500L * 1024L))) {
        BufferedImage image = new PDFRenderer(doc).renderImageWithDPI(0, 300, ImageType.RGB);
        ImageIO.write(image, "png", new File(result));
    }
}
{code}



--
This message was sent by Atlassian Jira
(v8.3.4#803005)

---------------------------------------------------------------------
To unsubscribe, e-mail: dev-unsubscribe@pdfbox.apache.org
For additional commands, e-mail: dev-help@pdfbox.apache.org