[PDFBOX-1661] Fix font subtype automatically

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.8.1
• Component/s: PDModel, Rendering
• Labels: encoding font

Environment

PDFBox: PDFBox 1.8.1
Reader: Adobe Reader 11.0.0
Generator: TCPDF 4.5.041

PDF Content:
<</Type /Font
/BaseFont /AdobeSongStd-Light,Bold-UniGB-UTF16-H
/Subtype /Type0
/Encoding /UniGB-UTF16-H
/DescendantFonts [27 0 R]

• Assignee: Unassigned
• Reporter: Raymond Wu
• Created: 16/Jul/13 05:58
• Updated: 15/Jul/15 09:16
• Resolved: 11/Oct/14 00:35

Description

Subtype is parsed as "Type0" by PDFBox, but parsed as "Type1" by Adobe Reader.
This is not a bug of PDFBox.
The reason is TCPDF 4.5.041 generate font AdobeSongStd-Light with bad subtype "Type0".
It should be "Type1".

I have test the following codes and they work.
File: org/apache/pdfbox/pdmodel/font/PDFontFactory.java
Method: public static PDFont createFont( COSDictionary dic ) throws IOException

Original:
else if( subType.equals( COSName.TYPE0 ) )
{
retval = new PDType0Font( dic );
}

Fixed:
else if( subType.equals( COSName.TYPE0 ) )
{
COSName encoding = (COSName)dic.getDictionaryObject(COSName.ENCODING);
retval = (encoding!=null) ? new PDType1Font( dic ) : new PDType0Font( dic );
}

With such patch PDFBox will act like Adobe Reader.