[ptx] nona, gimp-2, TIFF_mask multilater tiff files

[Bruno Postle]

On Wed 07-Jan-2004 at 08:44:09AM -0500, Ed Halley wrote:

> I was afraid of that.  If the same notes were added to bug 66886
> http://bugzilla.gnome.org/show_bug.cgi?id=66886 then we may be able to
> get Sven to support these extra details before it's finalized.

I added a comment to that bugzilla page.

> However, not having seen either version of the TIFF code, how does the
> tiff loader know which images are meant as masks and which are meant as
> layers?  To tiff, they're just images, right?  Maybe any single-channel
> image is a mask, when it follows/precedes a like-sized multi-channel
> image?

The gimp recognises them as masks, the only problem is that it loads
them as alpha-channels which destroys information in 100%
transparent areas instead of just masking.

Pablo, does nona create tiff "masks" or "alpha channels"? or are
they the same thing to libtiff?

-- 
Bruno