Leonard Wicke created PDFBOX-5849:
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Summary: ArrayIndexOutOfBoundsException in Apache PDFBox 3 in
connection with Font
Key: PDFBOX-5849
URL: https://issues.apache.org/jira/browse/PDFBOX-5849
Project: PDFBox
Issue Type: Bug
Components: FontBox, Rendering
Affects Versions: 3.0.2 PDFBox
Reporter: Leonard Wicke
We are using Apache PDFBox 3.0.2 in our software and have the following issue.
We want to write a String using the font FreeSansBold.
The font is loaded via PDType0Font#load from a TTF-file.
If we load the font with embedSubset=true than the following exception occurs:
java.lang.ArrayIndexOutOfBoundsException: Index 2941 out of bounds for
length 2912
at
org.apache.fontbox.ttf.TTFSubsetter.addCompoundReferences(TTFSubsetter.java:500)
at org.apache.fontbox.ttf.TTFSubsetter.getGIDMap(TTFSubsetter.java:147)
at
org.apache.pdfbox.pdmodel.font.TrueTypeEmbedder.subset(TrueTypeEmbedder.java:336)
at org.apache.pdfbox.pdmodel.font.PDType0Font.subset(PDType0Font.java:304)
at
org.apache.pdfbox.pdmodel.PDDocument.subsetDesignatedFonts(PDDocument.java:1046)
at org.apache.pdfbox.pdmodel.PDDocument.save(PDDocument.java:1034)
at org.apache.pdfbox.pdmodel.PDDocument.save(PDDocument.java:988)
at org.apache.pdfbox.pdmodel.PDDocument.save(PDDocument.java:944)
The reason is the question-mark-character (?). The character ! also causes an
exception.
Letters like a-zA-Z dont.
This character is first correctly identified as Glyph-ID 34 but then in
PDAbstractContentStream#encodeForGsub converted to 2914 by
GsubWorkerForDevanagari.
This glyph does not exist for this font.
This causes an exception when subsetting the font.
The exception does not occur when writing the text in the PDPageContentStream.
If we load the font with embetSubst=false then no exception occurs but the
character is not visible/skipped in the pdf.
I have only found old and fixed issues with ArrayIndexOutOfBoundsExceptions
(https://issues.apache.org/jira/browse/PDFBOX-4946).
Code to redproduce (you need the font FreeSansBold):
PDDocument document = new PDDocument();
File boldF = new File("src/test/resources/fonts", "FreeSansBold.ttf");
TrueTypeFont boldT = new TTFParser().parse(new
RandomAccessReadBufferedFile(boldF));
PDFont bold = PDType0Font.load(document, boldT, true);
PDPage page = new PDPage(PDRectangle.A4);
PDPageContentStream contentStream = new PDPageContentStream(document, page,
PDPageContentStream.AppendMode.APPEND, true, true);
contentStream.setFont(bold, 11);
contentStream.beginText();
contentStream.newLineAtOffset(50, 50);
contentStream.showText("?");
contentStream.endText();
contentStream.close();
document.addPage(page);
document.save(new File("Test.pdf"));
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