Created attachment 400250 [details]
Patch

Comment on attachment 400250 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=400250&action=review

> Source/WebCore/platform/graphics/ExtendedColor.cpp:91
> +bool ExtendedColor::isWhite() const
> +{
> +    auto [c1, c2, c3, alpha] = channels();
> +    return c1 == 1 && c2 == 1 && c3 == 1 && alpha == 1;
> +}
> +
> +bool ExtendedColor::isBlack() const
> +{
> +    auto [c1, c2, c3, alpha] = channels();
> +    return !c1 && !c2 && !c3 && alpha == 1;
>  }

These will be wrong for some non-RGB colorspaces, but we don't have any yet.

(In reply to Simon Fraser (smfr) from comment #5)
> Comment on attachment 400250 [details]
> Patch
> 
> View in context:
> https://bugs.webkit.org/attachment.cgi?id=400250&action=review
> 
> > Source/WebCore/platform/graphics/ExtendedColor.cpp:91
> > +bool ExtendedColor::isWhite() const
> > +{
> > +    auto [c1, c2, c3, alpha] = channels();
> > +    return c1 == 1 && c2 == 1 && c3 == 1 && alpha == 1;
> > +}
> > +
> > +bool ExtendedColor::isBlack() const
> > +{
> > +    auto [c1, c2, c3, alpha] = channels();
> > +    return !c1 && !c2 && !c3 && alpha == 1;
> >  }
> 
> These will be wrong for some non-RGB colorspaces, but we don't have any yet.

Right, that's why I moved it to ExtendedColor. So that when we have Lab (or whatever) we have a single place to implement all these predicates.

Committed r262151: <https://trac.webkit.org/changeset/262151>

All reviewed patches have been landed. Closing bug and clearing flags on attachment 400250 [details].

<rdar://problem/63631217>