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November 2012

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2012.11.24 00:09 "help writing thumbnails to TIFF file?", by Paul Heckbert
2012.11.24 00:46 "Re: help writing thumbnails to TIFF file?", by Joris Van Damme
2012.11.25 13:01 "Re: help writing thumbnails to TIFF file?", by Edward Lam
2012.11.25 15:08 "Re: help writing thumbnails to TIFF file?", by Joris Van Damme
2012.11.27 02:10 "Re: help writing thumbnails to TIFF file?", by Paul Heckbert
2012.11.27 03:25 "Re: help writing thumbnails to TIFF file?", by Bob Friesenhahn
2012.11.27 13:12 "Re: help writing thumbnails to TIFF file?", by Joris Van Damme
2012.11.27 14:38 "Re: help writing thumbnails to TIFF file?", by Olivier Paquet
2012.11.28 03:06 "Re: help writing thumbnails to TIFF file?", by Olivier Paquet
2012.12.08 04:35 "Re: help writing thumbnails to TIFF file?", by Paul Heckbert
2012.11.27 18:09 "Re: help writing thumbnails to TIFF file?", by Daniel Mccoy

2012.11.27 03:25 "Re: help writing thumbnails to TIFF file?", by Bob Friesenhahn

On Mon, 26 Nov 2012, Paul Heckbert wrote:
>
> PS: If we're interested in distant history, I worked with Sam Leffler
> at Pixar in 1986 and he and I wrote the Pixar Software Standards
> document together.

And Graphics Gems, and zoom, and ...

> I wonder if others have attempted to write two directories (IFDs)
> using TIFFCheckpointDirectory.  Anyone got pointers to code that does
> this?  Am I using TIFFSetDirectory properly?
>
> My current hypothesis: TIFFCheckpointDirectory works fine if you're
> writing only one directory, but it's buggy when there are multiple
> directories.

I expect that you are right that multiple directories does not work 
and it was not anticipated.  Libtiff provides source code so a 
well-tested patch which gets it to work as you like is useful and 
appreciated.  Of course the patch should not break other 
functionality.

Bob
-- 
Bob Friesenhahn
bfriesen@simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer,    http://www.GraphicsMagick.org/