On Thu, Apr 17, 2014 at 1:08 PM, Elle Stone <ellestone@xxxxxxxxxxxxxxxxxxxx> wrote: > The other day there was an IRC discussion of the possibility of GIMP > supporting RGB color spaces other than unbounded mode sRGB. > > I was surprised to see in the transcript a statement that GIMP shouldn't > support Adobe RGB (1998). It makes no sense to import opening files with any particular ICC profile, by definition unbounded gamut RGB spaces support storing and manipulating all colors of photo's/imagery of any bounded gamut RGB spaces. What actual color space/pixel format is being used for manipulation is a separate concern from how color data is passed around and actually stored. There are definetely many things to sort out and many things in GIMP that have are straight ports of the old 8bit/component code; keeping track of the _meta_data_ of an original color space/gamut/pixel format raster data originated in - and the ability to to chosen/select operations in that space is something that fits the strongly color managed architecture of GEGL. While doing global overrides of some of the internal pixel formats that are absolutely colorimetrically defined would make it easy to misconfigure the color settings yielding surprising and inconsistent behavior. > Adobe RGB (1998) is important for: > > * People preparing images for printing The default GEGL/babl pixel formats in floating point are unbounded; and personally I think the 16bit formats should be made 4.12 instead 0.16 fixed point to provide adequate headroom/footroom - though with a predominantely floating point based processing doing this might not be a huge win. > * People who save Adobe RGB (1998) camera jpegs Exporting to any particular bounded RGB gamut; as well as proofing whether colors are within a gamut should in no way be hampered. > * People who want or need a small gamut color space that is nonetheless > larger than the very small sRGB. The usefulness of the extended range in cyan/green; and how many perceptually discernable colors you gain compared to sRGB is questionable. > A summary rejection of Adobe RGB (1998) ignores the needs and accustomed > workflows of the many, many photographers who work in the Adobe RGB (1998) > color space. Not having saddle adapters as mandatory attachment mechanisms for car seats ignores the needs and accustomed workflows of horse riders used to maintain and customize their leather saddles. /pippin _______________________________________________ gimp-developer-list mailing list List address: gimp-developer-list@xxxxxxxxx List membership: https://mail.gnome.org/mailman/listinfo/gimp-developer-list List archives: https://mail.gnome.org/archives/gimp-developer-list
