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https://issues.apache.org/jira/browse/PDFBOX-2158?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Tilman Hausherr resolved PDFBOX-2158.
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Resolution: Fixed
Assignee: Tilman Hausherr
Fix Version/s: (was: 2.1.0)
2.0.0
Fixed for 2.0 only, 1.8 is more complex there.
> ExtractText missing most of text in this PDF file, due to font bounding box
> with minus infinity
> -----------------------------------------------------------------------------------------------
>
> Key: PDFBOX-2158
> URL: https://issues.apache.org/jira/browse/PDFBOX-2158
> Project: PDFBox
> Issue Type: Bug
> Components: Parsing, Text extraction
> Affects Versions: 1.8.5, 2.0.0
> Environment: Windows x64
> Reporter: Joel Hirsh
> Assignee: Tilman Hausherr
> Fix For: 2.0.0
>
> Attachments: PDFBOX-2158-077702.pdf, negative.text.box.pdf
>
>
> Attached PDF file is missing most of the text when processed by the
> ExtractText example program
> I traced it down to PDFontDescriptorDictionary.getFontBoundingBox() getting a
> rectange for COSName.FONT_BBOX that contained a ymin value of minus
> infinity. That method then creates a PDRectangle which calculates a bounding
> box with a ymin value of -65,329, and results in an enormous text size, and
> things go downhill from there. The text cannot be matched up, and most of it
> ends up being discarded.
> I was able to hack a fix by doing a check in the constructor
> PDRectangle.PDRectangle( COSArray array ) for big negative numbers and
> setting them to 0. With that change, all the text came through as expected.
> However, I don't have enough familiarity with the code to understand what a
> real fix ought to look like.
> The PDF file looks to be fine by other programs such as Acrobat and NitroPDF
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