[FOP-2977] [PATCH] Array index out of bounds with glyph position adjustments and surrogate pairs

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 2.6
• Fix Version/s: 2.8
• Component/s: renderer/pdf
• Environment: Windows 10
• Assignee: Simon Steiner
• Reporter: Kelly H Wilkerson
• Created: 09/Oct/20 20:57
• Updated: 22/Apr/22 10:59
• Resolved: 21/Apr/22 13:48

Description

Out of bounds happens in org.apache.fop.fonts.GlyphMapping.processWordMapping when:

1. There are glyph position adjustments for the font being used
2. There are surrogate pairs in the text that has adjustments

The font I've used to reproduce the issue so far is Segoe UI Emoji, which should be installed on Windows 10 by default.

input.fo attached to cause the crash.
I believe I've fixed the crash in the attached patch.

There's a separate issue demonstrated in the input.fo that the glyphs don't render in some cases, even though the font is the same throughout everything. But I'd like to make sure my fix for the crash is correct before I dig into the rendering issue.

org.apache.fop.apps.FOPException: java.lang.ArrayIndexOutOfBoundsException: 3
javax.xml.transform.TransformerException: java.lang.ArrayIndexOutOfBoundsException: 3
	at org.apache.fop.cli.InputHandler.transformTo(InputHandler.java:296)
	at org.apache.fop.cli.InputHandler.renderTo(InputHandler.java:116)
	at org.apache.fop.cli.Main.startFOP(Main.java:183)
	at org.apache.fop.cli.Main.main(Main.java:214)
Caused by: javax.xml.transform.TransformerException: java.lang.ArrayIndexOutOfBoundsException: 3
	at com.sun.org.apache.xalan.internal.xsltc.trax.TransformerImpl.transform(TransformerImpl.java:737)
	at com.sun.org.apache.xalan.internal.xsltc.trax.TransformerImpl.transform(TransformerImpl.java:343)
	at org.apache.fop.cli.InputHandler.transformTo(InputHandler.java:293)
	... 3 more
Caused by: java.lang.ArrayIndexOutOfBoundsException: 3
	at org.apache.fop.fonts.GlyphMapping.processWordMapping(GlyphMapping.java:177)
	at org.apache.fop.fonts.GlyphMapping.doGlyphMapping(GlyphMapping.java:92)
	at org.apache.fop.layoutmgr.inline.TextLayoutManager.processWord(TextLayoutManager.java:963)
	at org.apache.fop.layoutmgr.inline.TextLayoutManager.getNextKnuthElements(TextLayoutManager.java:881)
	at org.apache.fop.layoutmgr.inline.LineLayoutManager.collectInlineKnuthElements(LineLayoutManager.java:698)
	at org.apache.fop.layoutmgr.inline.LineLayoutManager.getNextKnuthElements(LineLayoutManager.java:627)
	at org.apache.fop.layoutmgr.BlockLayoutManager.getNextChildElements(BlockLayoutManager.java:141)
	at org.apache.fop.layoutmgr.BlockStackingLayoutManager.getNextKnuthElements(BlockStackingLayoutManager.java:292)
	at org.apache.fop.layoutmgr.BlockLayoutManager.getNextKnuthElements(BlockLayoutManager.java:113)
	at org.apache.fop.layoutmgr.BlockLayoutManager.getNextKnuthElements(BlockLayoutManager.java:105)
	at org.apache.fop.layoutmgr.BlockLayoutManager.getNextChildElements(BlockLayoutManager.java:141)
	at org.apache.fop.layoutmgr.BlockStackingLayoutManager.getNextKnuthElements(BlockStackingLayoutManager.java:292)
	at org.apache.fop.layoutmgr.BlockLayoutManager.getNextKnuthElements(BlockLayoutManager.java:113)
	at org.apache.fop.layoutmgr.BlockLayoutManager.getNextKnuthElements(BlockLayoutManager.java:105)
	at org.apache.fop.layoutmgr.FlowLayoutManager.getNextChildElements(FlowLayoutManager.java:223)
	at org.apache.fop.layoutmgr.FlowLayoutManager.addChildElements(FlowLayoutManager.java:148)
	at org.apache.fop.layoutmgr.FlowLayoutManager.getNextKnuthElements(FlowLayoutManager.java:116)
	at org.apache.fop.layoutmgr.FlowLayoutManager.getNextKnuthElements(FlowLayoutManager.java:69)
	at org.apache.fop.layoutmgr.PageBreaker.getNextKnuthElements(PageBreaker.java:252)
	at org.apache.fop.layoutmgr.AbstractBreaker.getNextBlockList(AbstractBreaker.java:675)
	at org.apache.fop.layoutmgr.PageBreaker.getNextBlockList(PageBreaker.java:179)
	at org.apache.fop.layoutmgr.PageBreaker.getNextBlockList(PageBreaker.java:159)
	at org.apache.fop.layoutmgr.AbstractBreaker.doLayout(AbstractBreaker.java:385)
	at org.apache.fop.layoutmgr.PageBreaker.doLayout(PageBreaker.java:113)
	at org.apache.fop.layoutmgr.PageSequenceLayoutManager.activateLayout(PageSequenceLayoutManager.java:143)
	at org.apache.fop.area.AreaTreeHandler.endPageSequence(AreaTreeHandler.java:267)
	at org.apache.fop.fo.pagination.PageSequence.endOfNode(PageSequence.java:139)
	at org.apache.fop.fo.FOTreeBuilder$MainFOHandler.endElement(FOTreeBuilder.java:362)
	at org.apache.fop.fo.FOTreeBuilder.endElement(FOTreeBuilder.java:190)
	at com.sun.org.apache.xml.internal.serializer.ToXMLSAXHandler.endElement(ToXMLSAXHandler.java:265)
	at org.apache.xerces.parsers.AbstractSAXParser.endElement(Unknown Source)
	at org.apache.xerces.xinclude.XIncludeHandler.endElement(Unknown Source)
	at org.apache.xerces.impl.XMLNSDocumentScannerImpl.scanEndElement(Unknown Source)
	at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(Unknown Source)
	at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source)
	at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
	at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
	at org.apache.xerces.parsers.XMLParser.parse(Unknown Source)
	at org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source)
	at org.apache.xerces.jaxp.SAXParserImpl$JAXPSAXParser.parse(Unknown Source)
	at com.sun.org.apache.xalan.internal.xsltc.trax.TransformerImpl.transformIdentity(TransformerImpl.java:659)
	at com.sun.org.apache.xalan.internal.xsltc.trax.TransformerImpl.transform(TransformerImpl.java:728)
	... 5 more

Issue Links

• is duplicated by: FOP-3012 Using Various Fonts to Achieve Multiple Languages Sometimes Results in Errors