Should gamut mapping be done in the gamutSpace of a color space?

[lloydk]

For example, srgb and hsl have the same gamutSpace (srgb).

Should gamut mapping color(display-p3 1 0 0) to srgb and hsl result in the same srgb color when converting the gamut mapped hsl color to srgb?

hsluv is off by quite a bit. Possibly because the hsluv conversion routines don't deal with colors outside the srgb gamut very well?

Gamut checking for all three colors is done in the srgb space but the clipping portion of the algorithms (and maybe other parts) is done in the origin space.

Here's a quick hack of the CSS portion of the toGamut function to do the mapping in gamutSpace and the gamut mapping results:

	if (method === "css") {
		let gamutSpace = color.space.gamutSpace;
		let colorInGamutSpace = to(color, gamutSpace);
		let mappedColor = toGamutCSS(colorInGamutSpace, {space: gamutSpace});
		spaceColor = to(mappedColor, color.space);
	}

Color notebook code

let color = new Color("color(display-p3 1 0 0)");
let rgb = color.to("srgb", {inGamut: true})
let hsl = color.to("hsl", {inGamut: true}).to("srgb")
let hsluv = color.to("hsluv", {inGamut: true}).to("srgb")