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https://issues.apache.org/jira/browse/PDFBOX-2934?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14909489#comment-14909489
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Tilman Hausherr commented on PDFBOX-2934:
-----------------------------------------
Some images:
- gs-bugilla691763.pdf, gs-bugzilla689439-alphamask.pdf, gs-bugzilla693322.pdf:
very dark (maybe related to what you mentioned "revert those values")
- PDFBOX-994.pdf is better
- PDFJS-5526-p11-13.pdf has a black bar on p3
- PDFBOX-2103.pdf is better but the drop shadows are very dark
- PDFBOX-2658.pdf face on top right now completely gone
Re "when to revert those values" - just an idea: could this be a RGB vs CMYK
problem? In RGB "doing nothing" means black, and "do all" means white, but in
CMYK it's the opposite, i.e. "do nothing" means white, and "do all" means black.
> Support smask /S /Alpha
> -----------------------
>
> Key: PDFBOX-2934
> URL: https://issues.apache.org/jira/browse/PDFBOX-2934
> Project: PDFBox
> Issue Type: Task
> Affects Versions: 2.0.0
> Reporter: Tilman Hausherr
> Attachments: PDFBOX2934_softmask.patch, PDFJS-1710-p1.pdf,
> PDFJS-1710-p1.pdf-1-better.png, PDFJS-1710-p1.pdf-1.png, PDFJS-1710-p7.pdf,
> PDFJS-1710-p7.pdf-1-better.png, PDFJS-1710-p7.pdf-1.png,
> PDFJS-5526-p11-13.pdf, gs-bugzilla689439-alphamask.pdf
>
>
> The smask feature /S /Alpha is either not implemented or not working at all.
> I have two files that are wrongly rendered with the current software, and
> correctly rendered when the feature is disabled \(!\). As a first step, I am
> disabling it for now and attach test files. Johns proposed patch has also
> disabled the feature, so I think we can agree on that.
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