Hi Alexandre, All, I didn't touch any of the CMYK stuff. I did write up some additional code that can use the lcms plug-in to convert between RGB and Grayscale, as a kind of practice exercise for converting between RGB and other types of color spaces. But I haven't submitted it as a patch because at present Gimp can't actually color-manage the display of Grayscale images (color-managing the display isn't done by the lcms plug-in).
The Grayscale-RGB code was easy to write because there is already code in the lcms plugin to detect whether an image is RGB or Grayscale. Unfortunately the CMYK code is not part of the lcms plugin. If anyone wants to work with me on this issue, I can write up the conversion code. It might be easier if all the conversions between different color spaces is handled in one place, preferably the lcms plugin itself. Then it would be very easy (a lot of code, but straightforward to write) to add conversions between LAB, XYZ, CMYK, RGB, and Grayscale. Elle Stone On 2/16/13, Alexandre Prokoudine <[email protected]> wrote: > On Sat, Feb 16, 2013 at 4:22 PM, Alexandre Prokoudine wrote: > >> If this is about the Gutenprint plug-in, then any wrongdoings are most >> likely on its side. > > Actually, after another reading of the original mail I think I made a > rush judgement. It's quite possible that GIMP is sending incorrect > data to the printing plug-in. I'm not sure if Elle looked at this part > of the color management implementation in GIMP during her work last > year. If that's indeed what's happening, it would be great to fix this > in 2.10. > > Alexandre Prokoudine > http://libregraphicsworld.org > _______________________________________________ > gimp-user-list mailing list > [email protected] > https://mail.gnome.org/mailman/listinfo/gimp-user-list > -- http://ninedegreesbelow.com - articles on open source digital photography _______________________________________________ gimp-user-list mailing list [email protected] https://mail.gnome.org/mailman/listinfo/gimp-user-list
