[PDFBOX-3092] Format 4 TTF cmap table is parsed incorrectly

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Invalid
• Affects Version/s: 2.0.0
• Assignee: Unassigned
• Reporter: John Hewson
• Created: 06/Nov/15 00:10
• Updated: 02/Nov/20 21:25
• Resolved: 02/Nov/20 21:25

Description

Certain large Format 4 cmap tables aren't being parsed correctly by CmapSubtable#processSubtype4(), for example in the font "ArialUnicodeMS".

This results in missing glyphs when rendering the file from PDFBOX-2950, when "ArialUnicodeMS" is used as a substitute. You can force this to happen by changing the following line of PDCIDFontType2:

// find font or substitute
CIDFontMapping mapping = FontMappers.instance()
                                    .getCIDFont(getBaseFont(), getFontDescriptor(),
                                                getCIDSystemInfo());

Replace getBaseFont() with "ArialUnicodeMS"

Issue Links

• relates to: PDFBOX-2950 Chinese font substitution issue