[ptx] nona TIFF_multi?

[Bruno Postle]

On Sun 01-Feb-2004 at 05:58:13 +0100, Kai-Uwe Behrmann wrote:
> 
> Can You send me an example tiff or an link to one? I like to take
> a look on it.

This is generated by nona using TIFF_mask:

    http://bugbear.blackfish.org.uk/~bruno/distance/

> As I posted in my email before I am not able to compile hugin from cvs at
> the moment. Is someone able to compile from current cvs?

Nope, I have the same problem.  I intend to try recompiling vigra
with different options to see if that helps.  No time at the moment.

> The GIMP/cinepaint tiff plug-ins where never been able to save an
> interleaved alpha channel to an mask. There are no options in the plug-in
> and no functions to do that job.

This isn't the plug-in, the tiff file initially appears as layers
with alpha channels.

At least with gimp2, I can remove the alpha channels and turn them
into full layer masks like so:

  Mask -> Add layer Mask -> Transfer Layer's Alpha Channel

The problem is the current gimp tif import actually multiplies the
RGB values by the alpha channel value - This destroys the data.

-- 
Bruno