[css-color-hdr] 2.4 "two dynamic-range-limit-mix values" should be "two or more ..."

[squelart]

#10271 added interpolation between multiple values of dynamic-range-limit, which can also work on more than two values, as seen in the example and WPT computed.html.
However the preceding paragraph 2.4 still starts with "This function takes two dynamic-range-limit values".
It should be updated to "two or more".

Bonus: For completeness, could it also support just one value? I think the algorithm to get the computed value would still work.
The zero-value case is already implicitly handled by "If the sum of all percentages is 0%, then the function is invalid."

[svgeesus]

Added the "two or more".

Supporting a single value needs more discussion, I think; so leaving this issue open for now.

[css-meeting-bot]

The CSS Working Group just discussed https://github.com/w3c/csswg-drafts/issues/11788, and agreed to the following:

• RESOLVED: require strict inequality for H1 and H2
• RESOLUTION: allow single value, well defined

The full IRC log of that discussion

<ChrisL> topic: https://github.com//issues/11788
<ChrisL> github: https://github.com//issues/11788
<ChrisL> ccameron: this is to avoid a divide by zero
<ccameron> the epsilon should only be used to color match (very exactly) with an image
<ccameron> this feature is good enough without eps
<ccameron> it's purely numerical
<ccameron> can set to like 0.5 even
<ccameron> the epsilon value is in the gain application color space (which is linear, and is either "base image" primaries or "alternate image" primaries)
<ccameron> in practice, that's sRGB, P3 or Rec2020 primaries
<ccameron> what's the gain application color space?
<ccameron> primaries of the first space specified is most "normal" default
<ChrisL> github: https://github.com//issues/11787
<ChrisL> RESOLVED: require strict inequality for H1 and H2
<ChrisL> github: https://github.com//issues/11694
<ChrisL> Most edits done, need to discuss about allowing a single value or not
<ChrisL> agenda is https://lists.w3.org/Archives/Member/w3c-css-wg/2025AprJun/0002.html
<ChrisL> WPT allows single value
<ChrisL> agenda is https://lists.w3.org/Archives/Member/w3c-css-wg/2025AprJun/0002.html
<ChrisL> RESOLUTION: allow single value, well defined
<ccameron> https://github.com//issues/11558