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November 2007
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2007.11.23 18:58 "Re: Bug in _TIFFFindFieldInfo and some DNG tags in 3.8.2", by Frank Warmerdam
Antonio Scuri wrote: > Hi, > > The DNG tags TIFFTAG_BLACKLEVEL, TIFFTAG_DEFAULTCROPSIZE and > TIFFTAG_DEFAULTCROPORIGIN, can be SHORT, LONG or RATIONAL. But in a test > file that is LONG, libTIFF is interpreting always as RATIONAL since > TIFFFindFieldInfo is using the first definition found. > > The problem is in the code: > > if (fip->field_tag == tag && > (dt == TIFF_ANY || fip->field_type == dt)) > return (tif->tif_foundfield = fip); > > It exists inside an "else" of (dt != TIFF_ANY), so it is ignoring the > second test always. > > In libTIFF 4.0 this implementation is completely different, so I don't > know if this bug report is relevant or not. And I did not test it with > version 4.0, so I also don't know if it is fixed. If anyone needs a test > image, please let me know. Antonio, If you file a ticket and assign it to me (warmerdam@pobox.com) along with a pointer to a file demonstrating the issue, I'll try and look into it. The plan is still to issue a 3.9.0 based on the pre-4 technology so I'd like to ensure it is working well. Your other question about custom tags is good, but I'm hoping Joris or Andrey will have a response. Best regards, -- ---------------------------------------+-------------------------------------- I set the clouds in motion - turn up | Frank Warmerdam, warmerdam@pobox.com light and sound - activate the windows | http://pobox.com/~warmerdam and watch the world go round - Rush | President OSGeo, http://osgeo.org