Stefan Ziegler created PDFBOX-6204:
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Summary: DType1FontEmbedder sets /Length to uncompressed PFB size,
causing broken font streams
Key: PDFBOX-6204
URL: https://issues.apache.org/jira/browse/PDFBOX-6204
Project: PDFBox
Issue Type: Bug
Components: PDModel
Affects Versions: 3.0.7 PDFBox
Reporter: Stefan Ziegler
{{PDType1FontEmbedder}} constructs a {{PDStream}} with {{{}FLATE_DECODE{}}},
which correctly sets {{/Length}} to the compressed byte count. It then
immediately overwrites that value with {{pfbParser.size()}} — the total
*uncompressed* PFB size:
{code:java}
// PDType1FontEmbedder.java, ~line 80
PDStream fontStream = new PDStream(doc, pfbParser.getInputStream(),
COSName.FLATE_DECODE);
fontStream.getCOSObject().setInt("Length", pfbParser.size()); // ← wrong:
uncompressed size
for (int i = 0; i < pfbParser.getLengths().length; i++)
fontStream.getCOSObject().setInt("Length" + (i + 1),
pfbParser.getLengths()[i]); // ← correct{code}
Per PDF spec, /Length on a stream must equal the number of bytes of the encoded
(post-filter) data.
The following line should be completely removed:
{code:java}
fontStream.getCOSObject().setInt("Length", pfbParser.size());{code}
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