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https://issues.apache.org/jira/browse/PDFBOX-2949?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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John Hewson reassigned PDFBOX-2949:
-----------------------------------
Assignee: John Hewson
> Rendering to ARGB brings black background
> -----------------------------------------
>
> Key: PDFBOX-2949
> URL: https://issues.apache.org/jira/browse/PDFBOX-2949
> Project: PDFBox
> Issue Type: Bug
> Affects Versions: 2.0.0
> Reporter: Tilman Hausherr
> Assignee: John Hewson
> Attachments: dora.pdf, doraargb.png, dorargb.png
>
>
> As reported by [~jon_wu] in the user mailing list... instead of the somewhat
> long thread, here's code I tried:
> {code}
> try (PDDocument document = PDDocument.load(new File(dir, "dora.pdf")))
> {
> PDFRenderer pdfRenderer = new PDFRenderer(document);
> BufferedImage bim = pdfRenderer.renderImageWithDPI(0, 300,
> ImageType.RGB);
> ImageIO.write(bim, "png", new File(dir, "dorargb.png"));
> bim = pdfRenderer.renderImageWithDPI(0, 300, ImageType.ARGB);
> ImageIO.write(bim, "png", new File(dir, "doraargb.png"));
> }
> {code}
> PDFRenderer has this:
> {code}
> Graphics2D g = image.createGraphics();
> if (imageType != ImageType.ARGB)
> {
> g.setBackground(Color.WHITE);
> }
> {code}
> We could just remove the line with the "if" and the braces. The question is,
> is the current behaviour a fault or a feature? Note that the ARGB image has a
> detail that is invisible in the RGB image.
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