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https://issues.apache.org/jira/browse/PDFBOX-1092?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13084833#comment-13084833
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Andreas Lehmkühler commented on PDFBOX-1092:
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I myself introduced the issue in revision 1081149 which is part of 1.6.0.
The problem was the calculation of the row length within the FlateFilter for
predictor values >= 10. I fixed that in revision 1157529
> Image Rendering Regression
> --------------------------
>
> Key: PDFBOX-1092
> URL: https://issues.apache.org/jira/browse/PDFBOX-1092
> Project: PDFBox
> Issue Type: Bug
> Environment: Windows, Java 1.5
> Reporter: Daniel Wilson
>
> Running ant testimage , I find several tests failing.
> ARCHIVERGB -- the version of the PNG file in
> trunk\pdfbox\src\test\resources\input\rendering is far closer to the AI than
> is the one that is output. I believe the problem has to do with the Stencil
> Mask.
> HOTRODCMYK -- same as ARCHIVERGB
> test-landscape2 -- not coming out in Landscape format any more
> A few others are reported as "not identical" but they are visually identical
> -- false-positives IMO. The above 3, however, have regressed since those
> image snapshots were taken ... version 1.2 IIRC.
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