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https://issues.apache.org/jira/browse/PDFBOX-1931?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13922101#comment-13922101
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Tilman Hausherr commented on PDFBOX-1931:
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>From the "an anomaly in the matrix" dept.:
Getting an X or Y scale value from a matrix object is not the same as getting a
scale value from an AffineTransform generated from a matrix. In the 1.8
version, the first is done (which brings a value != 0), in the 2.0 version, the
second is done, which brings a value = 0. It was introduced with rev 1562921,
by modifying the patch of [~lmpmbernardo] (which used the matrix scale method).
Luckily this wasn't done in 1.8.
I will fix this after making tests with other radial shading images to be sure
that my theory is correct.
> Radial shading is missing
> -------------------------
>
> Key: PDFBOX-1931
> URL: https://issues.apache.org/jira/browse/PDFBOX-1931
> Project: PDFBox
> Issue Type: Bug
> Components: Rendering
> Affects Versions: 2.0.0
> Reporter: John Hewson
> Labels: shading, shadingpattern
> Attachments: pdfbox-1931.pdf-1.png, uniekekans_test.pdf
>
>
> The attached file contains a radial shading fill which is missing.
> RadialShadingContext#calculateInputValues is returning NaN which seems to be
> incorrect.
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