DynamicImageResource.java fails on GIF output (in JDK 1.6)
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Key: WICKET-553
URL: https://issues.apache.org/jira/browse/WICKET-553
Project: Wicket
Issue Type: Bug
Components: wicket
Affects Versions: 1.3
Environment: Ubuntu 7.04, Sun JDK 1.6
Reporter: Nathan Hamblen
Fix For: 1.3
DynamicImageResource instances that render correctly in PNG and JPG fail to
output GIF in JDK 1.6 (the first to include a GIF writer). In comparing the
DynamicImageResource.toImageData() method to the ImageIO.write() convenience
method, I noticed that Wicket's does not dispose the writer or flush the
ImageOutputStream. Testing established that doing both of those (and it must be
the ImageOutputStream, not the wrapped ByteArrayOutputStream) fixes the problem
and GIFs are outputted correctly.
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