2021.12.08 21:39 "Re: [Tiff] Windows - difference in behavior when large RowsPerStrip is specified while writing Uncompressed vs LZW compressed TIFF file", by Nalini Vishnoi

Hi Paavo,

Thanks a lot for your response.

I understand that writing a single strip of large size is not recommended. I will keep that in mind.

However,

1. One correction to my previous email. The results that I shared in my last email are from libTIFF version 4.0.0 (an older version). When I tried to use 4.2.0, I didn't get the weird results of RowsPerStrip changing after writing Uncompressed TIFF file on Windows, the LZW compression issue remained the same. However, with 4.2.0 and using Linux, I see the same issue of changed RowsPerStrip when writing uncompressed data. Not sure why this is happening.
2. In case of LZW compression, as you said there is some 32-bit counter which is not capable of handling this large strip size - could it be different on different platforms? I am not seeing the issue of corrupted file on Linux platform, only on Windows. May be some overflow happening depending on the size of the counter and how that size is interpreted on different platforms?
3. Keeping in mind your recommendation, do you think this behavior should be reported as a libTIFF bug (functionality wise)?

Thanks again,
Nalini