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https://issues.apache.org/jira/browse/PDFBOX-5553?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17650075#comment-17650075
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Tilman Hausherr commented on PDFBOX-5553:
-----------------------------------------
Got it, it's related to a change in PDFBOX-1934, but which doesn't apply to
1-bit images (which were isolated in a later refactoring).
{code}
// indexed color spaces get the raw value, because
the TYPE_BYTE
// below cannot be reversed by the color space
without it having
// knowledge of the number of bits per component
{code}
More later.
> PDFRenderer resulting image has black background
> ------------------------------------------------
>
> Key: PDFBOX-5553
> URL: https://issues.apache.org/jira/browse/PDFBOX-5553
> Project: PDFBox
> Issue Type: Bug
> Components: Rendering
> Affects Versions: 2.0.27
> Reporter: Joseph Jezerinac
> Priority: Major
> Attachments: black-background.pdf
>
>
> Using the attached PDF as the pdf, the resulting png has a black ground using
> the code below. Opening this PDF in reader or chrome etc., the background is
> white.
> {code:java}
> PDDocument pdDocument = PDDocument.load(pdf,
> MemoryUsageSetting.setupMixed(1024 * 1024 * 56));
> try { BufferedImage image = new
> PDFRenderer(pdDocument).renderImageWithDPI(0, 300, ImageType.RGB);
> ImageIO.write(image, "png", new File("bad-black-background.png"));
> } finally {
> pdDocument.close();
> } {code}
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