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Date: Wed, 09 Jul 2008 13:02:20 -0400
To: tiff@lists.maptools.org
From: David Hoerl <dhoerl@mac.com>
Subject: [Tiff] Problems with non-symmetric tiled images
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I plan to create tiff files on the Mac OSX using libtiff (which by 
the way can be made into a universal 32/64 bit library quite easily).

The tile width is 128 and the length (height) 48. I can create the 
files using libtiff without error. They read in just fine in another 
program using libtiff. Also, Photoshop on the mac displays them just 
fine.

However, when I use any Apple's programs (Preview, Safari, etc) the 
images is all jumbled up (symmetric tiles look fine), so I entered a 
bug on their system. That said, I probably won't hear anything on 
this for ages.

The, it occurred to me - it could be a problem with libtiff, and 
maybe Photoshop uses libtiff, so it could be that Apple's reader was 
properly designed. [Thinking that the use of non-symmetric tiles is 
probably not very common.]

So, the purpose of this email: I'm looking for a way to definitively 
determine if libtiff correctly interprets the spec. What I can do is 
create an image with a single tile, no compression, then print it out 
byte by byte. Or maybe there is a better way?

David
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