[PDFBOX-624] Misplaced text

• Type: Bug
• Status: Closed
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: 1.0.0
• Fix Version/s: 1.1.0
• Component/s: FontBox, Text extraction, Utilities
• Assignee: Unassigned
• Reporter: Villu Ruusmann
• Created: 16/Feb/10 19:25
• Updated: 30/Mar/10 08:23
• Resolved: 19/Mar/10 17:45

Description

Thomas Fischer reported to [e-mail] that org.apache.pdfbox.ExtractText interchanges typographic ligatures "fi" and "fl". The sample document "documenta_math.pdf" was created using TeX and AFPL Ghostscript 6.50.

I used PDFBox 1.0.1-SNAPSHOT to verify this problem. The "fi" ligature behaves correctly (ie. text extraction yields "finite" and "infinite", not "flnite" and "inflnite"), but the overall text layout is a complete mess. Please see the PDF text extraction result "documenta_math.txt" and PDF rendering result "documenta_math_page4.png".

The cause of the horizontal text misplacement is not yet known. This could affect all PDF documents which have been created using TeX.