🚀 go-pugleaf

In article <1992Jul26.060536.22698@csus.edu> eps@cs.sfsu.edu writes:
>In article <4481@rosie.NeXT.COM> aozer@next.com (Ali Ozer) writes:
>>NeXTSTEP 2.x denotes alpha with the private MATTE tag; NeXTSTEP 3.0 uses
>>the newly created standard ExtraSamples tag.
>
>You mean alpha tiff format changed *again*???  [Before 2.0 NeXT
>used PhotoMetricInterpretation=5.]  Arrgh!!!
>
>					-=EPS=-

But Eric, what's the problem?  Our 3.0 images (with alpha) load under
2.0 just fine, and that was certainly the biggest concern...

Our 1.0 alpha format was real crufty. 2.0 fixed that by using a
private tag registered by SGI and used by Sam Leffler's library. As far
as I know, no one but SGI and NeXT used that format. The TIFF 6.0 spec
(just recently finalized) adopted a standard for alpha that was different 
and in NeXTSTEP 3.0 we decided to follow that.

Ali
Ali_Ozer@NeXT.com