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https://issues.apache.org/jira/browse/PDFBOX-1649?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14030805#comment-14030805
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Tilman Hausherr commented on PDFBOX-1649:
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Thanks for the feedback. Btw, soon to be released 1.8.6 will fix the
transparency problems that were introduced with 1.8.5, so if you have the time,
please test your application with a snapshot:
https://repository.apache.org/content/groups/snapshots/org/apache/pdfbox/pdfbox/
> PNG images with alpha channel displays thin grey lines
> ------------------------------------------------------
>
> Key: PDFBOX-1649
> URL: https://issues.apache.org/jira/browse/PDFBOX-1649
> Project: PDFBox
> Issue Type: Bug
> Components: Writing
> Affects Versions: 1.8.2
> Environment: Microsoft Windows [Version 6.1.7601]
> PDFBox 1.8.2
> Adobe Reader 10.1.7
> Google Chrome 27.0.1453.110 m
> Reporter: Niels Beekman
> Attachments: screenshot.png, test.pdf, test.png
>
>
> When including a PNG file in a PDF file, both Adobe Reader and Google Chrome
> show thin grey lines. I have attached a screenshot showing the issue.
> PDDocument document = new PDDocument();
> PDPage page = new PDPage(PDPage.PAGE_SIZE_A4);
> document.addPage(page);
> BufferedImage buffImage = ImageIO.read(new File("test.png"));
> PDPixelMap pixelMap = new PDPixelMap(document, buffImage);
> PDPageContentStream contentStream = new PDPageContentStream(document, page);
> contentStream.drawImage(pixelMap, 0, 0);
> contentStream.close();
> document.save(new File("test.pdf"));
> This does not happen with a flattened PNG (without alpha channel).
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