[PDFBOX-5254] Preserve indirect object reference when copying resources

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.0.24, 3.0.0 PDFBox
• Fix Version/s: 2.0.25, 3.0.0 PDFBox
• Component/s: AcroForm
• Assignee: Andreas Lehmkühler
• Reporter: Andreas Lehmkühler
• Created: 08/Aug/21 12:13
• Updated: 17/Dec/21 06:50
• Resolved: 09/Aug/21 19:37

Description

In AppearanceGeneratorHelper.validateAndEnsureAcroFormResources() font resources are copied by simply reassigning the PDFont from the default resources. This removes any indirect object references which leads to doubled objects when writing the pdf.

The issue revealed another issue with the COSWriter when lfatting the pdf from PDFBOX-4889 without compression.