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https://issues.apache.org/jira/browse/IMAGING-130?focusedWorklogId=254332&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-254332
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ASF GitHub Bot logged work on IMAGING-130:
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Author: ASF GitHub Bot
Created on: 05/Jun/19 12:07
Start Date: 05/Jun/19 12:07
Worklog Time Spent: 10m
Work Description: mgs255 commented on pull request #46: IMAGING-130:
Ignore extra bytes when LZW decoder table is full
URL: https://github.com/apache/commons-imaging/pull/46
Per the helpful comments from @DhyanB it would appear that the correct fix
in this case is to simply ignore extra bytes during GIF decoding. Added an
animated GIF that was previously causing an IOException.
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Issue Time Tracking
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Worklog Id: (was: 254332)
Time Spent: 10m
Remaining Estimate: 0h
> Reading of some GIF images throws java.io.IOException: AddStringToTable:
> codes: 4096 code_size: 12
> --------------------------------------------------------------------------------------------------
>
> Key: IMAGING-130
> URL: https://issues.apache.org/jira/browse/IMAGING-130
> Project: Commons Imaging
> Issue Type: Bug
> Components: Format: GIF
> Affects Versions: 1.0-alpha1
> Environment: Oracle JRE 1.7.0_45 on Windows 7
> Oracle JRE 1.7.0_55-b13 on Debian 7.5
> Reporter: Dhyan Blum
> Priority: Major
> Fix For: Patch Needed
>
> Time Spent: 10m
> Remaining Estimate: 0h
>
> Hi guys,
> for some GIF images Imaging.getBufferedImage(byte[] bytes) throws the
> following exception:
> {quote}
> java.io.IOException: AddStringToTable: codes: 4096 code_size: 12
> at
> org.apache.commons.imaging.common.mylzw.MyLzwDecompressor.addStringToTable(MyLzwDecompressor.java:112)
> at
> org.apache.commons.imaging.common.mylzw.MyLzwDecompressor.decompress(MyLzwDecompressor.java:168)
> at
> org.apache.commons.imaging.formats.gif.GifImageParser.readImageDescriptor(GifImageParser.java:388)
> at
> org.apache.commons.imaging.formats.gif.GifImageParser.readBlocks(GifImageParser.java:251)
> at
> org.apache.commons.imaging.formats.gif.GifImageParser.readFile(GifImageParser.java:455)
> at
> org.apache.commons.imaging.formats.gif.GifImageParser.readFile(GifImageParser.java:435)
> at
> org.apache.commons.imaging.formats.gif.GifImageParser.getBufferedImage(GifImageParser.java:646)
> at
> org.apache.commons.imaging.Imaging.getBufferedImage(Imaging.java:1378)
> at
> org.apache.commons.imaging.Imaging.getBufferedImage(Imaging.java:1292)
> {quote}
> I have the same problem when using ImageIO.read(). In my post on
> Stackoverflow (
> http://stackoverflow.com/questions/22259714/arrayindexoutofboundsexception-4096-while-reading-gif-file
> ) you will find an example image to reproduce the exception and a similar
> looking JDK bug report that I found using Google. Quote from the bug report:
> {quote}
> A DESCRIPTION OF THE PROBLEM :
> according to specification
> http://www.w3.org/Graphics/GIF/spec-gif89a.txt
> > There is not a requirement to send a clear code when the string table is
> > full.
> However, GIFImageReader requires the clear code when the string table is full.
> GIFImageReader violates the specification, clearly.
> In the real world, sometimes people finds such high compressed gif image.
> so you should fix this bug.
> {quote}
> I hope you will find this information helpful.
> Kind regards
> Dhyan
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