2020.08.16 13:20 "Re: [Tiff] Problems with Photoshop when a file is written is strips", by Bob Friesenhahn

I recently changed my code to write TIFF files in strips of 256kB rather than by scanline.

The code writes a 32 bit rational TIFF file. This file is quite large (100s of MB) so I'll only make it available via a file sharing site.

When opened in Photoshop CS6 through to CC 2020 it displays fine and I can convert to 16bit and save it and PS will reload it OK, but all other applications choke on the 16 bit file.

I can open the 32 bit file OK in GIMP and IrfanView, so I don't think that I've messed up - I think it's a PS bug.

Have you seen this before?

It sounds like you are writing TIFF files containing 16-bit floating 'half' format. Not many apps are going to be able to handle that format.

GraphicsMagick should be able to read such files, although floating point is not natively supported internally.

Bob

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