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2010.02.05 16:50 "[SPAM WARNING]Re: [Tiff] eta for bigtiff support?", by Toby Thain
On 5-Feb-10, at 11:36 AM, Edward Lam wrote: > > Also recall that TIFF has much more heterogeneous nature compared > to PSD > files. IMHO, just because Adobe went with a different extension for > PSD > is a weak argument to begin with. Changing a PSD parser to work with PSB as well only affects half a dozen lines of code. Not sure what you mean by less "heterogeneous", though. PSD is a menagerie of internally inconsistent representations and encodings - due to its ad-hoc, accretive history. --Toby > > Regards, > -Edward > > Chris Cox wrote: >> Yes, and around that time I brought the same arguments and reasons to >> the libTIFF team. >> And they rejected the idea of a different extension. >> >> PSD had problems going to a new version because too many third party >> implementations were not even checking the version number (or many >> other >> size fields) when reading the files. >> >> Chris >> >> >> >> On 2/4/10 9:35 AM, "Phil Harvey" <phil@owl.phy.queensu.ca> wrote: >> >> Regarding the choice of extension for BigTIFF: >> >> For what it's worth, I have just learned the Adobe released new >> version of their PSD format back in 2005, called "Photoshop Large >> Document Format". This change was very similar to that of >> BigTIFF in >> that a few of the pointers changed from 4 to 8 bytes. They also >> changed the file header from "8BPS\0\1" to "8BPS\0\2" so the >> new file >> format could be identified (this was a version number change >> according to the specification). >> >> Adobe uses a different extension for these files (PSB instead >> of PSD). >> >> - Phil >> >>> >> >> _______________________________________________ >> Tiff mailing list: Tiff@lists.maptools.org >> http://lists.maptools.org/mailman/listinfo/tiff >> http://www.remotesensing.org/libtiff/ >> >> >> --------------------------------------------------------------------- >> --- >> >> _______________________________________________ >> Tiff mailing list: Tiff@lists.maptools.org >> http://lists.maptools.org/mailman/listinfo/tiff >> http://www.remotesensing.org/libtiff/ > > _______________________________________________ > Tiff mailing list: Tiff@lists.maptools.org > http://lists.maptools.org/mailman/listinfo/tiff > http://www.remotesensing.org/libtiff/