Bruno P. Kinoshita created IMAGING-237:
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Summary: The PNG parser must inform the user if the compression
method is not supported
Key: IMAGING-237
URL: https://issues.apache.org/jira/browse/IMAGING-237
Project: Commons Imaging
Issue Type: Improvement
Components: Format: PNG
Affects Versions: 1.0-alpha1
Reporter: Bruno P. Kinoshita
Today I was looking at the ICCP chunk type and the PNG image parser, and
noticed that it was using the deflate compression only, regardless of the
compression method value passed by the user.
The documentation does say that deflate (0) is the supported compression, but
that vendor implementations may use different compression algorithms. So
instead of trying to use deflate (which would raise a runtime exception), we
should inform the user that the compression method is not supported.
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