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https://issues.apache.org/jira/browse/PDFBOX-2031?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13971397#comment-13971397
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Elija B commented on PDFBOX-2031:
---------------------------------
That's it!! Sorry I did not find the existing open issue and a fix. We can mark
this as duplicate/rejected.
> GrayScale images become inverted
> --------------------------------
>
> Key: PDFBOX-2031
> URL: https://issues.apache.org/jira/browse/PDFBOX-2031
> Project: PDFBox
> Issue Type: Bug
> Components: PDModel, Rendering
> Affects Versions: 1.8.4
> Environment: osx
> Reporter: Elija B
>
> PDPixelMap.getRGBImage() inverts images. After debugging it appears that the
> inversion happens at the end, in applyMasks(image);
> Some more debugging info:
> bitsPerComponent == 1
> getImageMask() == true
> getColorSpace() == PDDeviceGray
> map == new byte[] {(byte)0xff} // used for IndexColorModel
> In imageMask(baseImage) this happens:
> graphics.setColor(Color.BLACK);
> graphics.fillRect(0, 0, baseImage.getWidth(), baseImage.getHeight());
> // assume default values ([0,1]) for the DecodeArray
> // TODO DecodeArray == [1,0]
> graphics.setComposite(AlphaComposite.DstIn);
> graphics.drawImage(baseImage, null, 0, 0);
> graphics.dispose();
> return stencilMask;
> I wish I could provide a sample file, but I have no sanitized data files.
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