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LibWeb: Use premultiplied alpha when interpolating legacy sRGB colors

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Previously, we were only using premultiplied alpha for non-legacy
colors after converting them to the Oklab color space.
This commit is contained in:
Tim Ledbetter
2026-02-18 02:47:01 +00:00
committed by Sam Atkins
parent 7eb0bb7c70
commit 918937231e
Notes: github-actions[bot] 2026-02-19 10:46:50 +00:00 
Author: https://github.com/tcl3
Commit: https://github.com/LadybirdBrowser/ladybird/commit/918937231e9
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/8014
Reviewed-by: https://github.com/AtkinsSJ ✅
7 changed files with 88 additions and 82 deletions
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20
Tests/LibWeb/Text/expected/wpt-import/css/css-transitions/animations/text-shadow-interpolation.txt
View File

@@ -2,8 +2,8 @@ Harness status: OK
Found 168 tests
148 Pass
20 Fail
156 Pass
12 Fail
Pass CSS Transitions: property <text-shadow> from neutral to [green 20px 20px 20px] at (-0.3) should be [rgb(255, 176, 0) 7px 33px 7px]
Pass CSS Transitions: property <text-shadow> from neutral to [green 20px 20px 20px] at (0) should be [rgb(255, 165, 0) 10px 30px 10px]
Pass CSS Transitions: property <text-shadow> from neutral to [green 20px 20px 20px] at (0.3) should be [rgb(179, 154, 0) 13px 27px 13px]
@@ -30,26 +30,26 @@ Pass Web Animations: property <text-shadow> from neutral to [green 20px 20px 20p
Pass Web Animations: property <text-shadow> from neutral to [green 20px 20px 20px] at (1.5) should be [rgb(0, 110, 0) 25px 15px 25px]
Fail CSS Transitions: property <text-shadow> from [initial] to [green 20px 20px 20px] at (-0.3) should be [rgba(0, 0, 0, 0) -6px -6px 0px]
Pass CSS Transitions: property <text-shadow> from [initial] to [green 20px 20px 20px] at (0) should be [rgba(0, 0, 0, 0) 0px 0px 0px]
Fail CSS Transitions: property <text-shadow> from [initial] to [green 20px 20px 20px] at (0.3) should be [rgba(0, 128, 0, 0.3) 6px 6px 6px]
Fail CSS Transitions: property <text-shadow> from [initial] to [green 20px 20px 20px] at (0.6) should be [rgba(0, 128, 0, 0.6) 12px 12px 12px]
Pass CSS Transitions: property <text-shadow> from [initial] to [green 20px 20px 20px] at (0.3) should be [rgba(0, 128, 0, 0.3) 6px 6px 6px]
Pass CSS Transitions: property <text-shadow> from [initial] to [green 20px 20px 20px] at (0.6) should be [rgba(0, 128, 0, 0.6) 12px 12px 12px]
Pass CSS Transitions: property <text-shadow> from [initial] to [green 20px 20px 20px] at (1) should be [rgb(0, 128, 0) 20px 20px 20px]
Pass CSS Transitions: property <text-shadow> from [initial] to [green 20px 20px 20px] at (1.5) should be [rgb(0, 192, 0) 30px 30px 30px]
Fail CSS Transitions with transition: all: property <text-shadow> from [initial] to [green 20px 20px 20px] at (-0.3) should be [rgba(0, 0, 0, 0) -6px -6px 0px]
Pass CSS Transitions with transition: all: property <text-shadow> from [initial] to [green 20px 20px 20px] at (0) should be [rgba(0, 0, 0, 0) 0px 0px 0px]
Fail CSS Transitions with transition: all: property <text-shadow> from [initial] to [green 20px 20px 20px] at (0.3) should be [rgba(0, 128, 0, 0.3) 6px 6px 6px]
Fail CSS Transitions with transition: all: property <text-shadow> from [initial] to [green 20px 20px 20px] at (0.6) should be [rgba(0, 128, 0, 0.6) 12px 12px 12px]
Pass CSS Transitions with transition: all: property <text-shadow> from [initial] to [green 20px 20px 20px] at (0.3) should be [rgba(0, 128, 0, 0.3) 6px 6px 6px]
Pass CSS Transitions with transition: all: property <text-shadow> from [initial] to [green 20px 20px 20px] at (0.6) should be [rgba(0, 128, 0, 0.6) 12px 12px 12px]
Pass CSS Transitions with transition: all: property <text-shadow> from [initial] to [green 20px 20px 20px] at (1) should be [rgb(0, 128, 0) 20px 20px 20px]
Pass CSS Transitions with transition: all: property <text-shadow> from [initial] to [green 20px 20px 20px] at (1.5) should be [rgb(0, 192, 0) 30px 30px 30px]
Fail CSS Animations: property <text-shadow> from [initial] to [green 20px 20px 20px] at (-0.3) should be [rgba(0, 0, 0, 0) -6px -6px 0px]
Pass CSS Animations: property <text-shadow> from [initial] to [green 20px 20px 20px] at (0) should be [rgba(0, 0, 0, 0) 0px 0px 0px]
Fail CSS Animations: property <text-shadow> from [initial] to [green 20px 20px 20px] at (0.3) should be [rgba(0, 128, 0, 0.3) 6px 6px 6px]
Fail CSS Animations: property <text-shadow> from [initial] to [green 20px 20px 20px] at (0.6) should be [rgba(0, 128, 0, 0.6) 12px 12px 12px]
Pass CSS Animations: property <text-shadow> from [initial] to [green 20px 20px 20px] at (0.3) should be [rgba(0, 128, 0, 0.3) 6px 6px 6px]
Pass CSS Animations: property <text-shadow> from [initial] to [green 20px 20px 20px] at (0.6) should be [rgba(0, 128, 0, 0.6) 12px 12px 12px]
Pass CSS Animations: property <text-shadow> from [initial] to [green 20px 20px 20px] at (1) should be [rgb(0, 128, 0) 20px 20px 20px]
Pass CSS Animations: property <text-shadow> from [initial] to [green 20px 20px 20px] at (1.5) should be [rgb(0, 192, 0) 30px 30px 30px]
Fail Web Animations: property <text-shadow> from [initial] to [green 20px 20px 20px] at (-0.3) should be [rgba(0, 0, 0, 0) -6px -6px 0px]
Pass Web Animations: property <text-shadow> from [initial] to [green 20px 20px 20px] at (0) should be [rgba(0, 0, 0, 0) 0px 0px 0px]
Fail Web Animations: property <text-shadow> from [initial] to [green 20px 20px 20px] at (0.3) should be [rgba(0, 128, 0, 0.3) 6px 6px 6px]
Fail Web Animations: property <text-shadow> from [initial] to [green 20px 20px 20px] at (0.6) should be [rgba(0, 128, 0, 0.6) 12px 12px 12px]
Pass Web Animations: property <text-shadow> from [initial] to [green 20px 20px 20px] at (0.3) should be [rgba(0, 128, 0, 0.3) 6px 6px 6px]
Pass Web Animations: property <text-shadow> from [initial] to [green 20px 20px 20px] at (0.6) should be [rgba(0, 128, 0, 0.6) 12px 12px 12px]
Pass Web Animations: property <text-shadow> from [initial] to [green 20px 20px 20px] at (1) should be [rgb(0, 128, 0) 20px 20px 20px]
Pass Web Animations: property <text-shadow> from [initial] to [green 20px 20px 20px] at (1.5) should be [rgb(0, 192, 0) 30px 30px 30px]
Pass CSS Transitions: property <text-shadow> from [inherit] to [green 20px 20px 20px] at (-0.3) should be [rgb(255, 176, 0) 33px 7px 33px]