2009.04.16 13:39 "Re: [Tiff] Re garding TIFFRewriteDirectory", by Frank Warmerdam

I am using Libtiff version 4.0.0 in my application. I have a requirement of updating frames and custom tags for a tiff image. I update a frame using TIFFRewriteDirectory function. If i dont use this function the image gets corrupted. For a 16 bit tiff image, this approach has no problem. For 8 bit tiff image, if i update a frame and call TIFFRewriteDirectory, the frame does not get updated. If i do not call TIFFRewriteDirectory, the frame gets updated but the file gets corrupted.

I am not sure whether the approach which i have taken is correct. Any suggestions are welcome.

Munmun,

It would be helpful if you could provide a minimal code example and an input file that demonstrate the effects you are encountering. I might well need to run things in the debugger to analyse the problem.

Best regards,
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