Re: [svgwg] 'color-interpolation' isn't used for alpha compositing (#366)

> What @sobotka is explaining is that using the _LinearRGB_ term does not give you any information about the intrinsics of the colourspace itself, implying that you have to make assumptions about the underlying encoding of the RGB values.

Aha, I see the problem. My assumption, erroneous as it turn out, was that @sobotka had read the [portion of the SVG specification in question](https://www.w3.org/TR/SVG2/painting.html#ColorInterpolation) and was somehow asserting that the term `linearRGB` **as used in the SVG specification** wasn't a linear colorspace and indeed was not a colorspace at all. But apparently they were just reacting to the name, out of context.

If they had read the specification, they would have instantly realized that three items of information they requested are in fact clearly stated, and need not be "assumed".

@KelSolaar yes, I'm aware that the mercury vapor lights used for the 1931 RGB matching experiments were of course linear. And [a few years ago](https://www.w3.org/TR/SVGColor12/#interpolation) or even [decades ago](https://www.w3.org/TR/1999/REC-CSS1-19990111#color-units) there was no "assumption" of the sRGB primaries, D50 whitepoint, and sRGB or linear transfer function (as appropriate); it was clearly and explicitly stated.

-- 
GitHub Notification of comment by svgeesus
Please view or discuss this issue at https://github.com/w3c/svgwg/issues/366#issuecomment-461403622 using your GitHub account

Received on Thursday, 7 February 2019 12:40:57 UTC