[jira] [Updated] (PDFBOX-2158) ExtractText missing most of text in this PDF file, due to font bounding box with minus infinity

["John Hewson (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/PDFBOX-2158?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

John Hewson updated PDFBOX-2158:
--------------------------------
    Fix Version/s: 2.0.0

> 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
>             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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