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LibWeb: Use generic <color-interpolation-method> parsing for gradients

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See previous commit for details

We now support parsing of `display-p3-linear` (although it just falls
back to using Oklab since Skia doesn't support it)
This commit is contained in:
Callum Law
2026-03-18 21:51:26 +13:00
committed by Tim Ledbetter
parent d8c38a294c
commit 9db607b1a7
Notes: github-actions[bot] 2026-03-18 13:23:27 +00:00 
Author: https://github.com/Calme1709
Commit: https://github.com/LadybirdBrowser/ladybird/commit/9db607b1a77
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/8485
Reviewed-by: https://github.com/tcl3 ✅
13 changed files with 141 additions and 311 deletions
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109
Libraries/LibWeb/CSS/StyleValues/AbstractImageStyleValue.h
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@@ -50,115 +50,6 @@ enum class GradientRepeating {
No
};
enum class GradientSpace : u8 {
sRGB,
sRGBLinear,
DisplayP3,
A98RGB,
ProPhotoRGB,
Rec2020,
Lab,
OKLab,
XYZD50,
XYZD65,
HSL,
HWB,
LCH,
OKLCH,
};
enum class HueMethod : u8 {
Shorter,
Longer,
Increasing,
Decreasing,
};
struct InterpolationMethod {
GradientSpace color_space;
HueMethod hue_method = HueMethod::Shorter;
void serialize(StringBuilder& builder) const
{
switch (color_space) {
case GradientSpace::OKLab:
builder.append("in oklab"sv);
break;
case GradientSpace::sRGB:
builder.append("in srgb"sv);
break;
case GradientSpace::sRGBLinear:
builder.append("in srgb-linear"sv);
break;
case GradientSpace::DisplayP3:
builder.append("in display-p3"sv);
break;
case GradientSpace::A98RGB:
builder.append("in a98-rgb"sv);
break;
case GradientSpace::ProPhotoRGB:
builder.append("in prophoto-rgb"sv);
break;
case GradientSpace::Rec2020:
builder.append("in rec2020"sv);
break;
case GradientSpace::Lab:
builder.append("in lab"sv);
break;
case GradientSpace::XYZD50:
builder.append("in xyz-d50"sv);
break;
case GradientSpace::XYZD65:
builder.append("in xyz-d65"sv);
break;
case GradientSpace::HSL:
builder.append("in hsl"sv);
break;
case GradientSpace::HWB:
builder.append("in hwb"sv);
break;
case GradientSpace::LCH:
builder.append("in lch"sv);
break;
case GradientSpace::OKLCH:
builder.append("in oklch"sv);
break;
}
switch (hue_method) {
case HueMethod::Shorter:
// "shorter" is the default value and isn't serialized
break;
case HueMethod::Longer:
builder.append(" longer hue"sv);
break;
case HueMethod::Increasing:
builder.append(" increasing hue"sv);
break;
case HueMethod::Decreasing:
builder.append(" decreasing hue"sv);
break;
}
}
String to_string() const
{
StringBuilder builder;
serialize(builder);
return builder.to_string_without_validation();
}
static GradientSpace default_color_space(ColorSyntax color_syntax)
{
if (color_syntax == ColorSyntax::Legacy)
return GradientSpace::sRGB;
return GradientSpace::OKLab;
}
bool operator==(InterpolationMethod const&) const = default;
};
struct ColorStopListElement {
ValueComparingRefPtr<StyleValue const> transition_hint;
struct ColorStop {