John Hewson created PDFBOX-2753:
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Summary: Improve rendering of filled thin lines
Key: PDFBOX-2753
URL: https://issues.apache.org/jira/browse/PDFBOX-2753
Project: PDFBox
Issue Type: Improvement
Components: Rendering
Affects Versions: 2.0.0
Reporter: John Hewson
Assignee: John Hewson
Fix For: 2.0.0
While working on PDFBOX-1658 I noticed that the file also contains some thin
lines which disappear when rendering at lower resolutions. The problem is due
to the PDF having filled paths with a width < 1px being used, rather than using
stroked paths. Because these paths are rectangular, they're triggering our
heuristic gradient detector which disables anti-aliasing.
The solution is to increase the threshold for disabling anti-aliasing to paths
with a width and height > 1, and this file now renders perfectly, even at 72
dpi.
See the discussion in PDFBOX-1658 for further information.
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