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https://issues.apache.org/jira/browse/PDFBOX-3000?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15715714#comment-15715714
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Tilman Hausherr commented on PDFBOX-3000:
-----------------------------------------
The last commit was developed by debugging the rendering of
PDFJS-5811-2-p3_reduced4.pdf which has two nested transparency groups, none of
which start at (0,0). After doing the upper change ({{new PDRectangle(...}}),
many files were improved but some black rectangles started to appear in some
files, and a mysterious vertical line appeared in the middle of a less reduced
version, PDFJS-5811-2-p3_reduced.pdf, which has a softmask. Zooming in on that
one showed some grey that was at about 1/2 of the square. That one gave it away
that the softmask was also wrong by an offset, and this resulted in the second
change, in getBounds(). This fixed quite a lot of files.
And I'm also learned something: colors at wrong position => transparency
problem. Black squares, shadows at wrong position => softmask problem.
Improved files:
...
Changed files:
...
Worsened files:
...
> Transparency Group issues
> -------------------------
>
> Key: PDFBOX-3000
> URL: https://issues.apache.org/jira/browse/PDFBOX-3000
> Project: PDFBox
> Issue Type: Bug
> Components: Rendering
> Affects Versions: 2.0.0
> Reporter: John Hewson
> Fix For: 2.1.0
>
> Attachments: 007087-payment-due-p58_reduced2.pdf,
> PDFBOX-1697-reduced-rotations.pdf, PDFBOX-2182_mod.pdf, PDFBOX-3400-RGB.pdf,
> PDFBOX-3494_reduced.pdf, PDFBOX-3494_reduced_cropX.pdf, PDFBOX-3564-Mask.pdf,
> PDFBox3359PanelTestEnhanced.java, PDFJS-2845-p1.pdf,
> PDFJS-5811-2-p3_reduced.pdf, PDFJS-5811-2-p3_reduced4.pdf,
> PDFJS-5811-2-p4_reduced-rotations.pdf, PDFJS-5811-2.pdf,
> PDFJS-5853_reduced.pdf, ds-firewall-enterprise-p1_reduced.pdf,
> gs-bugzilla691157.pdf, gs-bugzilla691157_mod_unc.pdf,
> gs-bugzilla691157_mod_unc.png, gs-bugzilla691348.pdf,
> gs-bugzilla693322_reduced.pdf, gs-bugzilla694556-3.pdf,
> gs-bugzilla695354.pdf, gs-bugzilla695582-transparency-fill-stroke.pdf,
> gs-bugzilla695582-transparency-fill-stroke.pdf-1.png,
> samsung_galaxy_s_4_um-p1_reduced.pdf, softmask-rewrite-alt1.patch,
> softmask-rewrite.patch
>
>
> This is a follow-up issue for transparency group issues from PDFBOX-2423.
> More details to come.
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