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https://issues.apache.org/jira/browse/PDFBOX-1924?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Tilman Hausherr resolved PDFBOX-1924.
-------------------------------------
Resolution: Fixed
Fix Version/s: 2.0.0
1.8.5
Committed in rev 1569060 for the 2.0 version and 1569063 for the 1.8 branch.
> Gouraud shading: detect empty triangles
> ---------------------------------------
>
> Key: PDFBOX-1924
> URL: https://issues.apache.org/jira/browse/PDFBOX-1924
> Project: PDFBox
> Issue Type: Bug
> Affects Versions: 1.8.4, 2.0.0
> Reporter: Tilman Hausherr
> Assignee: Tilman Hausherr
> Priority: Minor
> Fix For: 1.8.5, 2.0.0
>
>
> 1) The ch14.pdf file has some empty triangles on p. 20, because two points of
> the triangle are identical. These empty triangles result in divide by zeroes,
> which can result in black raster coloring of a whole page at resolutions that
> I didn't use before.
> Bugfix: detect and delete empty triangles, and added code to detect an empty
> list and no background in GouraudShadingContext.getRaster().
> 2) One statement (raster.setPixels) in GouraudShadingContext was accidentally
> moved one line up in the past which could result in lower performance.
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