[IMAGING-130] Reading of some GIF images throws java.io.IOException: AddStringToTable: codes: 4096 code_size: 12

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.0-alpha1
• Fix Version/s: 1.0-alpha2
• Component/s: Format: GIF

Environment

Oracle JRE 1.7.0_45 on Windows 7
Oracle JRE 1.7.0_55-b13 on Debian 7.5

• Assignee: Bruno P. Kinoshita
• Reporter: Dhyan Blum
• Created: 25/May/14 03:08
• Updated: 07/Aug/20 04:25
• Resolved: 07/Jun/19 00:59

Description

Hi guys,

for some GIF images Imaging.getBufferedImage(byte[] bytes) throws the following exception:

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)

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:

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.

I hope you will find this information helpful.

Kind regards
Dhyan

Issue Links

• links to: GitHub Pull Request #46