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https://issues.apache.org/jira/browse/PDFBOX-2089?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14005691#comment-14005691
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Tilman Hausherr commented on PDFBOX-2089:
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Touching Matrix.getXScale() and Matrix.getYScale() is risky, see PDFBOX-1931.
And a negative scale isn't always wrong, e.g. for a flip.
> Negative width of character
> ---------------------------
>
> Key: PDFBOX-2089
> URL: https://issues.apache.org/jira/browse/PDFBOX-2089
> Project: PDFBox
> Issue Type: Bug
> Affects Versions: 2.0.0
> Reporter: Juraj Lonc
> Attachments: PDFBOX-2089_Matrix.diff, negative_width.pdf
>
>
> This PDF contains text matrix:
> -10.5679 0 0 -11.4 459.0349 19.4155 Tm
> that causes IMHO wrong calculation of character width (and height).
> Width and height calculated in PDFStreamEngine are negative numbers, because
> textMatrix.getXScale() gives negative value.
> I think it should be fixed in Matrix.getXScale() and Matrix.getYScale().
> Returning value should be fixed by Math.abs()
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