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Posted to dev@pdfbox.apache.org by "ASF subversion and git services (Jira)" <ji...@apache.org> on 2020/02/01 17:40:00 UTC
[jira] [Commented] (PDFBOX-4742) Incorrect handling of float
Infinity and NaN
[ https://issues.apache.org/jira/browse/PDFBOX-4742?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17028157#comment-17028157 ]
ASF subversion and git services commented on PDFBOX-4742:
---------------------------------------------------------
Commit 1873481 from Tilman Hausherr in branch 'pdfbox/branches/issue45'
[ https://svn.apache.org/r1873481 ]
PDFBOX-4742: throw Exception on NaN and Infinity
> Incorrect handling of float Infinity and NaN
> --------------------------------------------
>
> Key: PDFBOX-4742
> URL: https://issues.apache.org/jira/browse/PDFBOX-4742
> Project: PDFBox
> Issue Type: Bug
> Components: PDModel, Writing
> Affects Versions: 2.0.8, 2.0.18
> Reporter: Jose Novacho
> Priority: Major
> Fix For: 2.0.19, 3.0.0 PDFBox
>
> Attachments: Hello World.pdf
>
>
> When creating document, there is an issue if the operand for a command is floating number positive or negative Infinity, or NaN.
> The problem is in method {{{color:#172b4d} org.apache.pdfbox.pdmodel.PDPageContentStream#write. {color}}} In case the method {{org.apache.pdfbox.pdmodel.PDPageContentStream#writeOperand(float)}} receives as operand a floating number with value {{Float.POSITIVE_INFINITY}} or {{Float.NEGATIVE_INFINITY}} the result of formating is symbol for infinity: ∞ (unicode 0x221E). The NaN produce unicode symbol 0xFFFD (replacement character). This is then later converted to bytes using the US_ASCII encoding which produces symbol *?* (0x3F) this symbol is then put into the content stream and the resulting PDF is invalid.
>
> Mimimal working example to reproduce this issue.
>
> {code:java}
> public class InfiniteError {
> public static void main(String[] args) throws IOException {
> PDDocument document = new PDDocument();
> PDPage page = new PDPage();
> document.addPage(page);
> PDFont font = PDType1Font.HELVETICA_BOLD;
> PDPageContentStream contentStream = new PDPageContentStream(document, page, PDPageContentStream.AppendMode.OVERWRITE, false);
> contentStream.beginText();
> contentStream.setFont(font, 12);
> contentStream.newLineAtOffset(100, Float.POSITIVE_INFINITY); // incorrect value
> contentStream.showText("Hello World");
> contentStream.endText();
> contentStream.close();
> document.save("Hello World.pdf");
> document.close();
> }
> }
> {code}
>
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