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https://issues.apache.org/jira/browse/PDFBOX-2655?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14300829#comment-14300829
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Keiji Suzuki commented on PDFBOX-2655:
--------------------------------------
I forgot the existence of CID=0 when calculating the length of byte array and
had to add 1 to the max cid. So (N+8)/8 or N/8+1 solves this problem.
> PDCIDFontType2Embedder.buildCIDSet() ArrayOutOfBounds
> ------------------------------------------------------
>
> Key: PDFBOX-2655
> URL: https://issues.apache.org/jira/browse/PDFBOX-2655
> Project: PDFBox
> Issue Type: Bug
> Components: PDModel
> Affects Versions: 2.0.0
> Reporter: Alex Nevidomsky
>
> {code}
> byte[] bytes = new byte[(Collections.max(cidToGid.keySet()) + 7) / 8];
> ...
> bytes[cid / 8] |= mask;
> {code}
> Problem:
> [(N+7)/8] is not enough to store N/8 when N=8k (for example, 8).
> (N+8)/8 or N/8+1 seem to solve the problem, but not sure about the potential
> remote consequences.
> Test case:
> {code}
> PDDocument document = new PDDocument();
> PDPage page = new PDPage(PDRectangle.A4);
> document.addPage(page);
> String dir = "../../resources/";
> PDType0Font font = PDType0Font.load(document, new File(dir +
> "LiberationSans-Regular.ttf"));
> PDPageContentStream stream = new PDPageContentStream(document,
> page);
> stream.beginText();
> stream.setFont(font, 12);
> stream.setLeading(12 * 1.2);
> stream.newLineAtOffset(50, 600);
> //This particular Russian letter has been
> //a trouble maker in computer system for decades )
> stream.showText("я");
> stream.endText();
> stream.close();
> document.save("example.pdf");
> document.close();
> {code}
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