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libgimpwidgets, libgimpcolor: RGB and HSV should also show out-of-gamut…

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… in soft-proof space when soft-proofing is enabled.
This commit is contained in:
Jehan 2023-12-20 22:56:12 +09:00
parent de83bca814
commit 4b3702bfc1
2 changed files with 425 additions and 226 deletions
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22
libgimpcolor/gimpcolor.c
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@ -275,23 +275,19 @@ gimp_color_is_out_of_gamut (GeglColor *color,
}
else if (babl_space_is_cmyk (space))
{
gdouble cmyk[4];
GeglColor *c = gegl_color_new (NULL);
gdouble cmyk[4];
/* CMYK conversion always produces colors in [0; 1] range. What we want
* to check is whether the source and converted colors are the same in
* Lab space.
*/
gegl_color_get_pixel (color,
babl_format_with_space ("CMYK double", space),
cmyk);
/* We make sure that each component is within [0; 1], but accept a small
* error of margin (we don't want to show small precision errors as
* out-of-gamut colors).
*/
is_out_of_gamut = ((cmyk[0] < 0.0 && -cmyk[0] > CHANNEL_EPSILON) ||
(cmyk[0] > 1.0 && cmyk[0] - 1.0 > CHANNEL_EPSILON) ||
(cmyk[1] < 0.0 && -cmyk[1] > CHANNEL_EPSILON) ||
(cmyk[1] > 1.0 && cmyk[1] - 1.0 > CHANNEL_EPSILON) ||
(cmyk[2] < 0.0 && -cmyk[2] > CHANNEL_EPSILON) ||
(cmyk[2] > 1.0 && cmyk[2] - 1.0 > CHANNEL_EPSILON) ||
(cmyk[3] < 0.0 && -cmyk[3] > CHANNEL_EPSILON) ||
(cmyk[3] > 1.0 && cmyk[3] - 1.0 > CHANNEL_EPSILON));
gegl_color_set_pixel (c, babl_format_with_space ("CMYK double", space), cmyk);
is_out_of_gamut = (! gimp_color_is_perceptually_identical (color, c));
g_object_unref (c);
}
else
{