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Martin Mancuska commented on PDFBOX-4146: ----------------------------------------- You're welcome [~tilman]. Thanks for link, but for signing we use DSS ([https://github.com/esig/dss)] and it uses PDFBox as backend. > Patch: Fix for appearance of visible signature > ---------------------------------------------- > > Key: PDFBOX-4146 > URL: https://issues.apache.org/jira/browse/PDFBOX-4146 > Project: PDFBox > Issue Type: Bug > Components: Signing > Affects Versions: 2.0.8 > Reporter: Martin Mancuska > Assignee: Tilman Hausherr > Priority: Minor > Labels: Signature, patch > Fix For: 2.0.9, 3.0.0 PDFBox > > Attachments: visible_signature.patch > > > We're using PDFBox (as backend used by Esig DSS) for digital signing of > documents. We've found out that visible signature has different look on Mac > Preview app than other PDF viewers. After some investigation we suspect that > BBox-es for appearance of signature is not filled correctly by PDFBox. The > values are hard coded as [0, 0, 100, 50]. Also transformation matrix for > translating from form XObject coordinate system into default one has value > (1, 0, 0, 1, 0, 0) -> no scaling between default user coordinate system and > form XObject coordinate system. > Therefore I think that the Mac Preview App draws signature with dimensions > 100x50 because no transformation were done. > I've attached patch which solves this issue for us. The signature is shown > correctly in all PDF viewers now. Maybe you can take a look on it and > integrate it into your code base, or propose better solution. -- This message was sent by Atlassian JIRA (v7.6.3#76005) --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@pdfbox.apache.org For additional commands, e-mail: dev-h...@pdfbox.apache.org