LAB Channels type

[BERGER Cyrille]

> a and b are signed, however lcms encodes them as unsigned shorts using
> an offset. We're using these encoded values directly, so we have to
> treat them as unsigned and decode them to signed when presenting them to
> the user.
So we store them as unsigned or signed ? Because in the TIFF reader, I
convert ICCLab file (which use unsigned LAB with offset) to krita by
substracting the offset, and doing that we are correctly reading
files.

--
Cyrille Berger