Re: [Gimp-developer] Code for editing in non-sRGB color spaces

[Elle Stone <ellestone ninedegreesbelow com>]

On 04/06/2016 03:26 PM, Elle Stone wrote:
> The question isn't how to get the nine RGB profile colorant values from
> GIMP. That's easy.
>
> The question is given these nine floating point values, how to convey
> the values from GIMP to babl.

Like I said in my first post on this topic, the babl palette functions 
look like perhaps they could be used to ferry floating point values from 
GIMP to babl.

The following function placed inside babl's CIE.c 
(https://git.gnome.org/browse/babl/tree/extensions/CIE.c) does compile 
without errors:

void get_rgb (void)
{
  float rgbxyz[] = {
  0.436, 0.385, 0.143,
  0.222, 0.717, 0.061,
  0.014, 0.097, 0.714
  };

const Babl *rgb;
const Babl *rgba;
const Babl *format = rgb;

babl_new_palette ("mypalette", &rgb, NULL);

babl_palette_set_palette (format,
                          babl_format ("RGB float"),
                          rgbxyz, 3);

}

Palettes can be created in GIMP and then passed from GIMP to babl.

Once the matrix rgbxyz[] have been place inside a palette created in 
GIMP and then passed to babl, is there a way to retrieve the matrix from 
the palette for use as colorant values in CIE.c?

Best,
Elle