[Gdal-dev] BigTiff and libtiff

[Garrett Potts]

Hello All:

Looking at the latest cvs head of libtiff I see the exposed API as  
taking a uint16:

extern int TIFFSetDirectory(TIFF*, uint16)

This is good news that internally the bitdepth is higher.  Who should  
I send a message to for a patch, if that's the case?


Take care

Garrett

On Sep 15, 2007, at 5:15 AM, Andrey Kiselev wrote:

> On Fri, Sep 14, 2007 at 02:03:08PM -0400, Garrett Potts wrote:
>> I have been looking through the headers on BigTiff and was looking at
>> the bit size for the number of directories.  Looks like the directory
>> count can only support 16bit word which puts it at a limitation of
>> 65536 total.  Is this correct?
>
> It is not correct. Take a look at TIFFDirEntry structure in tiffiop.h,
> it has 64-bit tdir_count field. There is a link to specification:
>
>  http://www.awaresystems.be/imaging/tiff/bigtiff.html
>
> We certainly need large counts for strip/tile indexing, so it is.
>
> Best regards,
> Andrey
>
> -- 
> Andrey V. Kiselev
> ICQ# 26871517
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