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July 2008
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2008.07.09 17:02 "Problems with non-symmetric tiled images", by David Hoerl
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