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https://issues.apache.org/jira/browse/PDFBOX-4245?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16555996#comment-16555996
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Tilman Hausherr commented on PDFBOX-4245:
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The problem is that if we make this public, it becomes part of the API and we
can't remove it. The comment above that method you want to make public shows
that it is not stable at all.
My impression in June was that some part of your patch would have to be
modified to take care of the rotation.
> wrong rendering of the transparency group at the specific position on a page
> ----------------------------------------------------------------------------
>
> Key: PDFBOX-4245
> URL: https://issues.apache.org/jira/browse/PDFBOX-4245
> Project: PDFBox
> Issue Type: Bug
> Components: Rendering
> Affects Versions: 2.0.10
> Reporter: Jiri Kunhart
> Assignee: Tilman Hausherr
> Priority: Major
> Labels: patch
> Attachments: gs-bugzilla690022-reduced-rotations-cropbox.pdf,
> gs-bugzilla690022-reduced-rotations.pdf, gs-bugzilla690022.pdf,
> pdfbox-2.0.10-SNAPSHOT_transparency_group_all.patch,
> pdfbox-2.0.10-SNAPSHOT_transparency_group_resources.zip,
> pdfbox-2.0.10-SNAPSHOT_transparency_group_sources.patch,
> pdfbox-2.0.10-SNAPSHOT_transparency_group_sources_2.patch
>
>
> The rendering of the transparency groups works only if the whole page is
> rendered. If you try to render only a part of the page where is a
> transparency group placed, you will get only the white image or an image with
> shifted pixels representing applied soft mask. The simple fix is attached in
> the patch, including the test and the resources used for testing.
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