There is a small percentage of PNG images that the standard ImageIO
codecs don't load properly. So, it's not directly a FOP problem.
The reason this appears in FOP 0.94 but not in 0.93 is that we switched
from our internal PNG codec to the one from ImageIO because it's faster.
Only after that change did we notice that the ImageIO codec from Sun has
bugs.
Work-around: To get the same behaviour as with FOP 0.93 you can change
src/java/org/apache/fop/image/ImageFactory.java:
Look for this:
imt = new ImageMimeType("image/png");
imageMimeTypes.put(imt.getMimeType(), imt);
//Image I/O is faster and more memory-efficient than own codec for PNG
imt.addProvider(imageIoImage);
imt.addProvider(pngImage);
Now just exchange the last two lines above and recompile FOP:
imt.addProvider(pngImage);
imt.addProvider(imageIoImage);
I'm currently refactoring the image package based on all the experience
of the past. Things like that shouldn't happen anymore as I'm planning
on writing a fallback mechanism so when an image cannot be loaded by one
codec, a different one is tried.
You could help me if you sent me this PNG image so I can test with it.
Thanks.
Jeremias Maerki
On 08.11.2007 13:08:27 nancy_b wrote:
>
> Hi guys,
>
> I upgraded to FOP 0.94, and now I can't compile a document that is compiled
> well with FOP 0.93. The following is the error message:
>
> Nov 8, 2007 1:57:22 PM org.apache.fop.image.ImageIOImage loadBitmap
> SEVERE: Error while loading image: LUT has improper length!
> java.lang.IllegalArgumentException: LUT has improper length!
> at javax.imageio.ImageTypeSpecifier$Indexed.<init>(Unknown Source)
> at javax.imageio.ImageTypeSpecifier.createIndexed(Unknown Source)
> at com.sun.imageio.plugins.png.PNGImageReader.getImageTypes(Unknown
> Source)
> at com.sun.imageio.plugins.png.PNGImageReader.readImage(Unknown
> Source)
> at com.sun.imageio.plugins.png.PNGImageReader.read(Unknown Source)
> at
> org.apache.fop.image.ImageIOImage.loadBitmap(ImageIOImage.java:98)
> at
> org.apache.fop.image.ImageIOImage.loadDimensions(ImageIOImage.java:68)
> at
> org.apache.fop.image.AbstractFopImage.load(AbstractFopImage.java:161)
> at
> org.apache.fop.fo.flow.ExternalGraphic.bind(ExternalGraphic.java:75)
> at org.apache.fop.fo.FObj.processNode(FObj.java:125)
> at
> org.apache.fop.fo.FOTreeBuilder$MainFOHandler.startElement(FOTreeBuilder.java:320)
> at
> org.apache.fop.fo.FOTreeBuilder.startElement(FOTreeBuilder.java:185)
> at
> org.apache.xalan.transformer.TransformerIdentityImpl.startElement(TransformerIdentityImpl.java:1072)
> at org.apache.xerces.parsers.AbstractSAXParser.startElement(Unknown
> Source)
> at
> org.apache.xerces.parsers.AbstractXMLDocumentParser.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.xalan.transformer.TransformerIdentityImpl.transform(TransformerIdentityImpl.java:484)
> at
> org.apache.fop.cli.InputHandler.transformTo(InputHandler.java:165)
> at org.apache.fop.cli.InputHandler.renderTo(InputHandler.java:115)
> at org.apache.fop.cli.Main.startFOP(Main.java:166)
> at org.apache.fop.cli.Main.main(Main.java:197)
> Nov 8, 2007 1:57:22 PM org.apache.fop.fo.flow.ExternalGraphic bind
> SEVERE: Cannot read image dimensions: url(images/icon_plug_eth.png)
> Nov 8, 2007 1:57:22 PM org.apache.fop.image.ImageIOImage loadBitmap
> SEVERE: Error while loading image: null
>
> Note that this image is a small icon with dimensions 1*1 cm. Please, advise!
>
> Regards,
> Nancy
> --
> View this message in context:
> http://www.nabble.com/FoP-0.94-bug-tf4770550.html#a13645816
> Sent from the FOP - Users mailing list archive at Nabble.com.
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