Branch: refs/heads/main
  Home:   https://github.com/WebKit/WebKit
  Commit: f50ff1b65e66ad902c1feef193dd0a4342197e7c
      
https://github.com/WebKit/WebKit/commit/f50ff1b65e66ad902c1feef193dd0a4342197e7c
  Author: Sam Weinig <[email protected]>
  Date:   2026-06-02 (Tue, 02 Jun 2026)

  Changed paths:
    M 
LayoutTests/imported/w3c/web-platform-tests/css/css-color/parsing/alpha-color-computed-expected.txt
    M 
LayoutTests/imported/w3c/web-platform-tests/css/css-color/parsing/alpha-color-parsing-valid-expected.txt
    M Source/WebCore/Sources.txt
    M Source/WebCore/WebCore.xcodeproj/project.pbxproj
    M Source/WebCore/css/parser/CSSPropertyParserConsumer+Color.cpp
    M Source/WebCore/css/values/color/CSSAbsoluteColorResolver.h
    M Source/WebCore/css/values/color/CSSColor.cpp
    M Source/WebCore/css/values/color/CSSColor.h
    M Source/WebCore/css/values/color/CSSColorDescriptors.h
    A Source/WebCore/css/values/color/CSSRelativeAlphaColor.cpp
    A Source/WebCore/css/values/color/CSSRelativeAlphaColor.h
    A Source/WebCore/css/values/color/CSSRelativeAlphaColorResolver.cpp
    A Source/WebCore/css/values/color/CSSRelativeAlphaColorResolver.h
    M Source/WebCore/css/values/color/CSSRelativeColorResolver.h
    M Source/WebCore/css/values/primitives/CSSUnevaluatedCalc.h
    M Source/WebCore/style/values/color/StyleColor.cpp
    M Source/WebCore/style/values/color/StyleColor.h
    A Source/WebCore/style/values/color/StyleRelativeAlphaColor.cpp
    A Source/WebCore/style/values/color/StyleRelativeAlphaColor.h
    M Source/WebCore/style/values/primitives/StyleLengthWrapper.h

  Log Message:
  -----------
  [Color] Add support for the alpha() relative color function
https://bugs.webkit.org/show_bug.cgi?id=315952

Reviewed by Tim Nguyen and Darin Adler.

Adds support for the newly added alpha() relative color function
(https://drafts.csswg.org/css-color-5/#relative-alpha).

A few test cases in 
imported/w3c/web-platform-tests/css/css-color/parsing/alpha-color-computed.html
are failing, but its not immediately clear they align with the spec. The 
question
is being tracked with the CSSWG in 
https://github.com/w3c/csswg-drafts/issues/13994.

* 
LayoutTests/imported/w3c/web-platform-tests/css/css-color/parsing/alpha-color-computed-expected.txt:
* 
LayoutTests/imported/w3c/web-platform-tests/css/css-color/parsing/alpha-color-parsing-valid-expected.txt:
* Source/WebCore/Sources.txt:
* Source/WebCore/WebCore.xcodeproj/project.pbxproj:
* Source/WebCore/css/parser/CSSPropertyParserConsumer+Color.cpp:
* Source/WebCore/css/values/color/CSSColor.cpp:
* Source/WebCore/css/values/color/CSSColor.h:
* Source/WebCore/css/values/color/CSSColorDescriptors.h:
* Source/WebCore/css/values/color/CSSRelativeAlphaColor.cpp: Added.
* Source/WebCore/css/values/color/CSSRelativeAlphaColor.h: Added.
* Source/WebCore/css/values/color/CSSRelativeAlphaColorResolver.cpp: Added.
* Source/WebCore/css/values/color/CSSRelativeAlphaColorResolver.h: Added.
* Source/WebCore/css/values/primitives/CSSUnevaluatedCalc.h:
* Source/WebCore/style/values/color/StyleColor.cpp:
* Source/WebCore/style/values/color/StyleColor.h:
* Source/WebCore/style/values/color/StyleRelativeAlphaColor.cpp: Added.
* Source/WebCore/style/values/color/StyleRelativeAlphaColor.h: Added.

Canonical link: https://commits.webkit.org/314397@main



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