Re: Ppm 16bit handling

["bruno@xxxxxxxxxxx" <bruno@xxxxxxxxxxx>]

On 05/07/12 06:04, Simon Budig wrote:
> bruno@xxxxxxxxxxx (bruno@xxxxxxxxxxx) wrote:
> > I noticed that when I open a 16bit ppm in GIMP 2.8, the file opens
> > without the 'gimp can't handle 16bit, it will loose data, etc...'
> > notification. But if I open a tiff version of the very same raw
> > file, the notification does pop up. My understanding is that current
> > GIMP 2.8 can't handle 16bit, regardless of file format. Is that
> > right?
> Yes, these warning dialogs are generated by the file-format plugin and
> it seems the ppm plugin just silently discards data.
>
> Gimp 2.8 is limited to 8 bit per channel, but if you feel adventurous
> you are invited to try the current git version of babl/gegl/gimp and
> experiment with the new high-bit-depth support. This still is strictly
> unstable and has an inconsistent UI in lots of places. It is fun though
> :)
>
> I hope this helps,
>          Simon
Hi,
So after a bunch of package installing and compiling, I am successfully
running Gimp 2.9.1 from git, on debian wheezy.
The thing is, when I open a 16bit tiff, Gimp *still* pops up the "can't 
handle 16bit,
information will be lost...". After opening the file I go to Image > 
Precision  and change
to 16bit. But from what I understand, setting the file to 16bit *after* 
it was downed
from 16 to 8 doesn't help. Information was already discarded in the 
first conversion.
I don't understand: can't Gimp just open the file as it is, with no 
conversion whatsoever, since
support to 16bit is there?

Thanks much,


Bruno

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