Tilman Hausherr created PDFBOX-2050:
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Summary: Add predictor to LZW filter
Key: PDFBOX-2050
URL: https://issues.apache.org/jira/browse/PDFBOX-2050
Project: PDFBox
Issue Type: Bug
Affects Versions: 1.8.4, 1.8.5, 2.0.0
Reporter: Tilman Hausherr
Assignee: Tilman Hausherr
Priority: Minor
According to the PDF spec "LZW and Flate Predictor Functions", both can have
post processing with predictors. It is implemented for Flate but not for LZW. I
am adding this by using the existing code from the Flate filter, which I will
be moving into a helper class.
While looking at the Flate filter, I noticed that its footprint is higher than
needed, i.e. there is too much buffering. I will test this separately and
commit only if I can measure an improvement.
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