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https://issues.apache.org/jira/browse/PDFBOX-2170?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14048477#comment-14048477
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John Hewson edited comment on PDFBOX-2170 at 7/1/14 3:55 AM:
-------------------------------------------------------------
This bug is caused by a fundamental flaw in Villu's original design of
Type1CharStringParser which assumes that the subroutines can be expanded
without executing their commands. That turned out not to be true some time ago
due to the need to execute the built-in "othersubrs".
What we're seeing here is a continuation of that problem: the "othersubrs"
actually require the "div" operator to be executed, so the entire notion of
expanding the subrs and othersubrs into a single sequence breaks down. Rather
than doing a ton of refactoring I've added a workaround: a removeInteger()
method which can execute a "div" command during the processing of an
"othersubr". Fixed in [r1606973|http://svn.apache.org/r1606973].
was (Author: jahewson):
This bug is caused by a fundamental flaw in Villu's original design of
Type1CharStringParser which assumes that the subroutines can be expanded
without executing their commands. That turned out not to be true some time ago
due to the need to execute the built-in "othersubrs".
What we're seeing here is a continuation of that problem: the "othersubrs"
actually require the "div" operator to be executed, so the entire notion of
expanding the subrs and othersubrs into a single sequence breaks down. Rather
than doing a ton of refactoring I've added a workaround: a removeInteger()
method which can execute a "div" command during the processing of an
"othersubr". Fixed in [r1606973|http://svn.apache.org/r1606973.].
> java.lang.ClassCastException: org.apache.fontbox.cff.CharStringCommand cannot
> be cast to java.lang.Integer
> ----------------------------------------------------------------------------------------------------------
>
> Key: PDFBOX-2170
> URL: https://issues.apache.org/jira/browse/PDFBOX-2170
> Project: PDFBox
> Issue Type: Bug
> Affects Versions: 2.0.0
> Reporter: Tilman Hausherr
> Assignee: John Hewson
> Labels: type1font
> Attachments: 002-002166.pdf
>
>
> p.59 of the attached file fails with
> {code}
> java.lang.ClassCastException: org.apache.fontbox.cff.CharStringCommand cannot
> be cast to java.lang.Integer
> at
> org.apache.fontbox.cff.Type1CharStringParser.parse(Type1CharStringParser.java:110)
> at
> org.apache.fontbox.cff.Type1CharStringParser.parse(Type1CharStringParser.java:89)
> at
> org.apache.fontbox.cff.Type1CharStringParser.parse(Type1CharStringParser.java:72)
> at
> org.apache.fontbox.type1.Type1Font.getType1CharString(Type1Font.java:151)
> at
> org.apache.fontbox.type1.Type1Font$Mapping.getType1CharString(Type1Font.java:207)
> at
> org.apache.pdfbox.pdfviewer.font.Type1Glyph2D.<init>(Type1Glyph2D.java:93)
> at
> org.apache.pdfbox.pdfviewer.font.Type1Glyph2D.<init>(Type1Glyph2D.java:65)
> Start parsing '002.zip002167.pdf'
> at
> org.apache.pdfbox.rendering.PageDrawer.createGlyph2D(PageDrawer.java:556)
> {code}
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