[FOP-3095] External SVG used to work but doesn't now

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Not A Problem
• Affects Version/s: 2.5, 2.2, 2.3, 2.4, 2.6, 2.7
• Component/s: foreign/svg, image/svg
• Environment: fop CLI in kubuntu 20.04
• Assignee: Unassigned
• Reporter: Fret Net
• Created: 29/Sep/22 04:54
• Updated: 08/Nov/22 08:30
• Resolved: 08/Nov/22 08:30

Description

The example at examples/fo/svg/external.fo used to work (v2.1, 2.0) but now fails. This has been reported in issue FOP-3070. The resolution there was to remove the example file.

It would be useful if this functionality still worked. A typical line from the example file is:

<fo:external-graphic src="file:boxes.svg"/>

I used this command:

fop external.fo external.pdf

Running the CLI gives (excerpt):

Sep. 29, 2022 2:45:48 PM org.apache.fop.events.LoggingEventListener processEvent
SEVERE: Image not available. URI: file:boxes.svg. Reason: org.apache.xmlgraphics.image.loader.ImageException: The file format is not supported. No ImagePreloader found for file:boxes.svg (See position 63:44)
org.apache.xmlgraphics.image.loader.ImageException: The file format is not supported. No ImagePreloader found for file:boxes.svg
       at org.apache.xmlgraphics.image.loader.ImageManager.preloadImage(ImageManager.java:181)
       at org.apache.xmlgraphics.image.loader.cache.ImageCache.needImageInfo(ImageCache.java:127)
       at org.apache.xmlgraphics.image.loader.ImageManager.getImageInfo(ImageManager.java:123)
       at org.apache.fop.fo.flow.ExternalGraphic.bind(ExternalGraphic.java:81)
       at org.apache.fop.fo.FObj.processNode(FObj.java:131)
       at org.apache.fop.fo.FOTreeBuilder$MainFOHandler.startElement(FOTreeBuilder.java:321)
       at org.apache.fop.fo.FOTreeBuilder$2.run(FOTreeBuilder.java:185)
       at org.apache.fop.fo.FOTreeBuilder$2.run(FOTreeBuilder.java:182)
       at java.base/java.security.AccessController.doPrivileged(Native Method)
       at org.apache.fop.fo.FOTreeBuilder.startElement(FOTreeBuilder.java:181)
       at org.apache.xalan.transformer.TransformerIdentityImpl.startElement(TransformerIdentityImpl.java:1073)
       at org.apache.xerces.parsers.AbstractSAXParser.startElement(Unknown Source)
       at org.apache.xerces.parsers.AbstractXMLDocumentParser.emptyElement(Unknown Source)
       at org.apache.xerces.xinclude.XIncludeHandler.emptyElement(Unknown Source)
       at org.apache.xerces.impl.XMLNSDocumentScannerImpl.scanStartElement(Unknown Source)
       at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$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 org.apache.xalan.transformer.TransformerIdentityImpl.transform(TransformerIdentityImpl.java:485)
       at org.apache.fop.cli.InputHandler.transformTo(InputHandler.java:293)
       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)