Matthias Fratz created IMAGING-262:
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Summary: TIFF Parser ignores XMP Metadata if TagType is UNDEFINED
Key: IMAGING-262
URL: https://issues.apache.org/jira/browse/IMAGING-262
Project: Commons Imaging
Issue Type: Bug
Components: Format: TIFF
Affects Versions: 1.0-alpha1
Reporter: Matthias Fratz
Attachments: xmp-metadata-with-tag-type-undefined.patch
commons-imaging only extracts XMP metadata from TIFFs when the IFD's type field
is BYTE. According to the Adobe spec ([https://www.adobe.com/devnet/xmp.html],
part 3 "Storage in Files" section 1.1.6 "TIFF", table 13) it can be either
UNDEFINED or BYTE, and some of the files we are processing have it set to
UNDEFINED lately. I cannot share the offending files unfortunately because
they're somewhat confidential.
The attached patch changes commons-imaging to write BYTES, but accept either
BYTES or UNDEFINED when reading. It passes all existing unit tests and we've
had it in production for a while without problems. The diff is against
1.0-alpha1, but applies to master with line offsets.
Please let me know if you need further information.
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