2012.03.15 17:54 "Re: [Tiff] RFC3949 TIFF-FX support", by Frank Warmerdam

2012.03.16 03:27 "Re: [Tiff] RFC3949 TIFF-FX support", by Lee Howard

On 03/16/2012 02:09 AM, Bob Friesenhahn wrote:

It seems we have had TIFF-FX discussions before and they went no where for some reason, but I don't recall any details.

It seems that we could easily support TIFF-FX tags but my recollection is that TIFF-FX data needs to be output in a specific order and libtiff does not provide any such assurance so libtiff is not assured to write TIFF-FX complaint TIFF.

By specific order I assume you are referring to the weird part of

TIFF-FX, where a block of tags can be created on a page, using

TIFFTAG_GLOBALPARAMETERSIFD,which apply to all pages.That part can't really be fully expressed by libtiff, as libtiff stands. All the other tags are harmless, and do not create conflicts. I can't think of any reason they should not go into libtiff. Adobe was involved in the definition of TIFF-FX, so if they had created conflicts that would have been pretty stupid.

Hi Steve,

Submit a patch for the changes, and I'm sure we can get it worked in.

Thanks,

Lee.