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2009.04.27 19:49 "[Tiff] Question regarding unassociated alpha", by Amir Ebrahimi
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2009.04.27 21:14 "Re: [Tiff] Question regarding unassociated alpha", by Daniel McCoy
2009.04.27 21:33 "Re: [Tiff] Question regarding unassociated alpha", by Amir Ebrahimi
2009.04.28 20:37 "Re: [Tiff] Question regarding unassociated alpha", by Chris Cox
[...]

2009.04.27 21:33 "Re: [Tiff] Question regarding unassociated alpha", by Amir Ebrahimi

On Apr 27, 2009, at 2:14 PM, Daniel McCoy wrote:

If you want to change TIFFReadRGBAImage to return RGBA where A might or might not be associated, you will force all existing clients to read the extra samples tag and perform any desired alpha operations itself. Defeating the original purpose of TIFFReadRGBAImage.

Thanks Chris / Daniel. So, effectively this is by-design. I'm not expecting libtiff to break compatibility with existing programs, so I will just make the changes I need and move on.

:: Amir Ebrahimi::
Developer @ Unity Technologies
www.unity3d.com