[RFC wayland-protocols 1/1] unstable: add color management protocol

[Erwin Burema]

On Thu, 14 Feb 2019 at 16:38, Sebastian Wick
<sebastian at sebastianwick.net> wrote:
>
> Thanks. I don't really know about all the standards so I'll just trust
> you on this.
>

These are correct suggestions and do improve the readability by a lot
> On 2019-02-14 05:47, Chris Murphy wrote:
> > On Wed, Feb 13, 2019 at 7:55 PM Sebastian Wick
> > <sebastian at sebastianwick.net> wrote:
> >
> >
> >> +      <entry name="absolute" value="1"/>
> >
> > I suggest ICC spec language.  'ICC-absolute colorimetric'
> >
> >> +      <entry name="relative" value="2"/>
> >
> > 'media-relative colorimetric'
> >
> >
> >> +      <entry name="none" value="0" summary="no known color space" />
> >
> > I think this is 'deviceRGB' although it could be 'unknown'.
> > Practically, it could only be unknown if the values aren't being
> > displayed or output anywhere. The instant RGB values are displayed
> > anywhere, the color space is knowable, therefore it's at least
> > deviceRGB. But unknown is also consistent with EXIF.
> >
> > And 'color space' can be assumed.
> >
> >> +      <entry name="sRGB" value="1" summary="sRGB color space" />
> >
> > Summary probably should be 'sRGB IEC61966-2.1' and again 'color space'
> > can be assumed.
> >
> >> +      <entry name="adobeRGB" value="2" summary="Adobe RGB" />
> >
> > Summary probably should be 'Adobe RGB (1998)'
> >
> >> +      <entry name="DCI-3P" value="3" summary="DCI-3P" />
> >
> > DCI-P3
> > But there are three, so it needs to be specific which one or define
> > all three. And there's a variant, which is 'Display P3' from Apple,
> > which starts out being defined with DCI-P3 D65 but uses a tone
> > response curve defined by the sRGB curve.
> >
> >
> >> +      <entry name="rec2020" value="4" summary="rec2020" />
> >
> > Probably the summary should be 'ITU-R BT.2020 for UHDTV' same for
> > below.
> >
> >> +      <entry name="rec2020-pq" value="5" summary="rec2020 with pq
> >> curve (HDR)" />
> >> +      <entry name="rec2020-hlg" value="6" summary="rec2020 with HLG
> >> curve (HDR)" />
> >
> > It's reasonable to add 'ITU-R BT.709 for HDTV' or Rec. 709 since
> > that's used today still.
> >
> >
> > --
> > Chris Murphy
> > _______________________________________________
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> > wayland-devel at lists.freedesktop.org
> > https://lists.freedesktop.org/mailman/listinfo/wayland-devel
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