2006.06.09 20:54 "Re: [Tiff] private IFDs - when will they be implemented.", by Andrey Kiselev

On Fri, Jun 09, 2006 at 04:24:35PM +0200, Sebastian Böhmer wrote:

Last Year in december you have had the attention on the private IFDs.

"arbitrary custom directory reading"

http://www.asmail.be/msg0054783371.html [http://www.asmail.be/msg0054783371.html]

In http://www.asmail.be/msg0054949034.html [http://www.asmail.be/msg0054949034.html]

is a description of writing private IFDs but like I understand, only with reimplementing by inherite of the libtiff.

My question is:

Exist now an interface for private IFDs (custom directory writing) in libtiff?

If yes it would be nice if someone could explain me the using.

Sebastian,

Latest libtiff has a function to read the custom IFD. Moreover, there is a special function for EXIF directory, so you can read the TIFF EXIF directory without a problem. The only drowback is the lack of documentation and samples... Sorry, I am still not have a time to write the good one.

We have a code to read the custom IFDs, but the code to write custom directories still not ready. I want to implement this functionality in the next libtiff release. The next release will be major upgread featuring the new completely rewriten Old JPEG module (thanks to amazing work done by Joris!) and ne JBIG module (thanks to Lee Howard!). Sorry folks, but no timeline for the next release. Please, try the CVS tree, we can't proceed without your support and bug reports.

Regards,

Andrey

--
Andrey V. Kiselev
ICQ# 26871517