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May 2012

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2012.05.29 13:27 "libtiff and orientation data", by <stunton@orange.fr>
2012.05.30 13:13 "Re: libtiff and orientation data", by <stunton@orange.fr>
2012.05.30 13:38 "Re: libtiff and orientation data", by Bob Friesenhahn
2012.05.30 14:51 "Re: libtiff and orientation data", by <stunton@orange.fr>

2012.05.30 13:38 "Re: libtiff and orientation data", by Bob Friesenhahn

On Wed, 30 May 2012, Stunton wrote:

>> Message du 29/05/12 15:30
>> De : "Stunton"
>> A : tiff@lists.maptools.org
>> Objet : [Tiff] libtiff and orientation data
>>
>> Hello,
>>
>> I have an orientation problem with libtiff.
>> I read the red canal of an image, using TIFFGetR(raster[i]).
>> The data are read top-to-bottom.
>> Ok.
>
> My mistake was here, the data are read bottom-to-top...

No one responded since it was not clear what you were asking.  The 
TIFF data might physically be written in various orders, and even a 
random order.  Libtiff is able to read the data in the order that you 
request (on a per-strip level), but access might be slower if the 
order you request is different than the file.

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