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https://issues.apache.org/jira/browse/PDFBOX-2156?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14039931#comment-14039931
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Tilman Hausherr commented on PDFBOX-2156:
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Fixed in the 1.8 branch rev 1604450 for axial and radial shading.
> different shading patterns at different resolutions when ctm is null
> --------------------------------------------------------------------
>
> Key: PDFBOX-2156
> URL: https://issues.apache.org/jira/browse/PDFBOX-2156
> Project: PDFBox
> Issue Type: Bug
> Components: Rendering
> Affects Versions: 1.8.5, 1.8.6
> Reporter: Tilman Hausherr
> Assignee: Tilman Hausherr
> Labels: shading, shadingpattern
> Attachments: swftools-gradients.pdf, swftools-gradients1.jpg
>
>
> The attached file renders incorrectly except at 72dpi; at other resolutions,
> there are different results that get worse as the resolution gets higher.
> This effect happens only in the 1.8 versions.
> The reason is that the transformation is incomplete if the ctm is null. The
> effect doesn't happen in the 2.0 version. I already have a fix but will make
> some tests and try another strategy too.
> I found the file here and it was created by Matthias Kramm:
> https://github.com/jdapena/swftools/tree/master/spec
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