pdmodel.font.PDSimpleFont hanging on TrueType font (ubuntu)
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Key: PDFBOX-988
URL: https://issues.apache.org/jira/browse/PDFBOX-988
Project: PDFBox
Issue Type: Bug
Components: PDModel
Affects Versions: 1.5.0
Environment: Ubuntu 8.04 - Headless
Reporter: Craig Stires
When calling PDPage.convertToImage(imagetype,resolution) , I have found a case
where the application hangs. No error messages, no exceptions, no CPU spike,
no I/O. The error had to do with some strange corruption of the awtFont, by
the time it reached the method PDSimpleFont.drawString. Some pretty deep
digging turned up that if a font with too few glyphs is sent into
PDSimpleFont.writeFont, it will enter Graphics2D.drawString ... ne'er to return.
If a check is done to count the glyphs and if they fall below a certain
threshold, then just re-instantiate the Font, then all goes well. Typical
numbers range from 70 to 1000+, so I've gone with an arbitrary value of 40.
All goes well, and I can't measure any difference in performance (except that
my app will actually return from attempting this doc!).
Attached is a sample PDF which can re-create the problem, and a patch which
seems to solve it sensibly.
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