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Posted to dev@pdfbox.apache.org by "ASF subversion and git services (Jira)" <ji...@apache.org> on 2021/11/05 15:53:00 UTC
[jira] [Commented] (PDFBOX-5313) `NullPointerException` when
intersecting area with null clipping path
[ https://issues.apache.org/jira/browse/PDFBOX-5313?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17439351#comment-17439351 ]
ASF subversion and git services commented on PDFBOX-5313:
---------------------------------------------------------
Commit 1894761 from Tilman Hausherr in branch 'pdfbox/branches/2.0'
[ https://svn.apache.org/r1894761 ]
PDFBOX-5313: avoid NPE as suggested by Henry Iguaro; save and restore clip; closes #133
> `NullPointerException` when intersecting area with null clipping path
> ---------------------------------------------------------------------
>
> Key: PDFBOX-5313
> URL: https://issues.apache.org/jira/browse/PDFBOX-5313
> Project: PDFBox
> Issue Type: Bug
> Components: Rendering
> Affects Versions: 2.0.24
> Reporter: Henry Iguaro
> Priority: Minor
>
> Hey guys!
> We got a PDF that manages to trigger the following NPE from {{PageDrawer}}:
>
> {code:java}
>
> java.lang.NullPointerException: null
> at java.desktop/java.awt.geom.Area.<init>(Area.java:126)
> at org.apache.pdfbox.rendering.PageDrawer.fillPath(PageDrawer.java:900)
> at org.apache.pdfbox.contentstream.operator.graphics.FillNonZeroRule.process(FillNonZeroRule.java:37)
> at org.apache.pdfbox.contentstream.PDFStreamEngine.processOperator(PDFStreamEngine.java:933)
>
> {code}
>
> The file even breaks on {{pdf-debugger}} (it fails to render).
>
> *Unfortunately, I can’t share the file.*
> Looking at the documentation for [{{Graphics.getClip()}}|https://docs.oracle.com/javase/6/docs/api/java/awt/Graphics.html#getClip()], it mentions that the result can be {{null}}, and if {{null}} is passed to the {{Area}} constructor this ends up in a {{NullPointerException}}. Further studying the {{PageDrawer}} code, it seems that {{graphics.getClip()}} shouldn't return {{null}}, however, we proposed a small fix in the following PR that seems to do the trick:
> [https://github.com/apache/pdfbox/pull/133]
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