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December 2004
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2004.12.13 13:54 "Re: TIFF Pyramid", by Eric Vergnaud
le 13/12/04 13:32, Joris à joris.at.lebbeke@skynet.be a écrit : > I wrote: > > In the first image IFD, the SubIFDs tag is set with value > > 3, and that yields a file with one main (biggest) image and 3 downsample > > SubIFDs. If I change the value 3 of the SubIFDs tag to e.g. 2, it works as > > expected, one main image is written, 2 SubIFDs are linked to that main image, > > and the last is again written as a top-level IFD. > > I just noticed, it doesn't actually produce a SubIFD chain, but a SubIFD array. > Meaning, the first SubIFD doesn't point to the second etc, but all SubIFDs are > directly pointed to from the SubIFD tag. > > I do think that's uncommon, but it's valid, I think, according to the > specification supplement that described SubIFDs tag. Ok, I'll have a look at this in the next few days and let you know. ------------------------------- Eric VERGNAUD - JLynx Software Cutting-edge technologies and services for software companies web: http://www.jlynx.com -------------------------------