On 01/23/2010 08:04 AM, Martin Nordholts wrote:
> Hi
> Right now we don't have a clearly defined color management strategy for
> I would like us to settle a minimal color management strategy for GIMP
> so that we can fix some inconsistencies in our color management, in
> particular for PNG [1], for 2.8. In short the problem with PNG is that
> the current code always writes an sRGB chunk to a PNG file if no color
> profile is attached to the image and no gamma is specified.
> I suggest that we formally settle with this minimal color management
> strategy:
> """
> An image either has or has not a color profile attached. A color
> profile is attached as a GimpParasite named "icc-profile".
> For images that have a color profile attached, this color profile is
> used when displaying the image and is embedded when the image is saved
> or exported.
> For images that does not have a color profile attached, the global
> color profile defined under Color Management in Preferences is used to
> display the image, but no profile is embedded into saved or exported
> files.
> """
> So, does the above sound like a sound foundation for color management in
> GIMP? I don't expect us to have time to apply this strategy consistently
> all over GIMP for 2.8 but at least we have settled on something that we
> can put in devel-docs and continue to build on later, and it allows us
> to fix the PNG problem for 2.8.

Sounds eminently reasonable; I had run into this issue also.

I had naively signed up for the "work on color management" job.  That 
said, do you happen to know where the sRGB thingie is added by default? 
  (if not, I can probably find it, but if you know offhand, I'm not 
beyond laziness ;o)

I had also been taking a peek at [2] and [3], which also seem to fall 
under the umbrella of this desired behavior.  Finally, [4] is something 
that bites me a lot, but needs some UI/UX work.  guiguru?

[2] https://bugzilla.gnome.org/show_bug.cgi?id=556608 "Monitor color 
profile is not applied to filter preview"
[3] https://bugzilla.gnome.org/show_bug.cgi?id=478528 "Layer previews 
are not color managed"
[4] https://bugzilla.gnome.org/show_bug.cgi?id=320447 "fast switching 
between 'color managed display' and 'softproof'"

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