Tilman Hausherr created PDFBOX-5376:
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Summary: Image interpolation when there shouldn't be
Key: PDFBOX-5376
URL: https://issues.apache.org/jira/browse/PDFBOX-5376
Project: PDFBox
Issue Type: Bug
Components: Rendering
Affects Versions: 2.0.25
Reporter: Tilman Hausherr
Assignee: Tilman Hausherr
Fix For: 2.0.26, 3.0.0 PDFBox
Two elements in the rendering of this file (by Kurt Pfeifle)
https://github.com/angea/PDF101/blob/master/handcoded/111_current-transformation-matrix-ctm.pdf
look like shadings but they are not, it's a tiny image. The cause is a
miscalculation of {{isScaledUp}} which didn't take into account that
{{getScalingFactorX()}} / {{getScalingFactorY()}} may return negative values.
Rendering after the change has mostly invisible differences except for
PATTYP2.pdf where they are easier to see.
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