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Issue #2982 - clamp oklab/oklch to [0,1] before conversion to closer match spec

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Basilisk-Dev 2026-03-06 13:45:26 -05:00 • committed by EAZYBLACK
commit 8c4b5a0e58
2 changed files with 8 additions and 3 deletions
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9
layout/style/nsCSSParser.cpp
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@ -184,9 +184,12 @@ LinearSRGBToEncoded(float aValue)
static nscolor
OKLabToSRGBColor(float aL, float aA, float aB, float aAlpha)
{
float lRoot = aL + 0.3963377774f * aA + 0.2158037573f * aB;
float mRoot = aL - 0.1055613458f * aA - 0.0638541728f * aB;
float sRoot = aL - 0.0894841775f * aA - 1.2914855480f * aB;
// Per CSS Color, the lightness component for Oklab/Oklch is clamped.
float lightness = mozilla::clamped(aL, 0.0f, 1.0f);
float lRoot = lightness + 0.3963377774f * aA + 0.2158037573f * aB;
float mRoot = lightness - 0.1055613458f * aA - 0.0638541728f * aB;
float sRoot = lightness - 0.0894841775f * aA - 1.2914855480f * aB;
float l = lRoot * lRoot * lRoot;
float m = mRoot * mRoot * mRoot;