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November 2003
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2003.11.17 00:45 "TIFF, v3.6.0. Fetching "custom" tags", by Chris Losinger
i'm trying to read data in tag 34665 (EXIF data). In 3.5.7, i used
the tags/xtiff extension to read this non-core tag, and it worked fine.
But, since the v3.6.0.html page states:
"Custom tags can be set and fetched normally using TIFFSetField() and
TIFFGetField(), and appear pretty much like normal tags to application code. "
I assume I can get rid of the tags/xtiff stuff and LibTiff will
happily read and store any tags that it finds, even non-core tags, like 34665.
But, it doesn't seem to be working. When reading the TIFF dir, i
get warnings about "unknown field with tag 34665 (0x8769) encountered", and
when i call TIFFGetField, nothing is returned. It looks like v3.6.0. is
behaving pretty much exactly like 3.5.7: complain about strange tags, then
ignore them. But that's not what the documentation says is supposed to happen.
confused.
-c
----
Chris Losinger
losinger@earthlink.net
smallest@smalleranimals.com http://www.smalleranimals.com