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LibWeb: Interpolate circle() function by computed value

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Tim Ledbetter 2025-09-13 15:16:34 +01:00 • committed by Sam Atkins
commit f146207a04
Notes: github-actions[bot] 2025-09-15 09:36:04 +00:00
3 changed files with 86 additions and 72 deletions
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14
Libraries/LibWeb/CSS/Interpolation.cpp
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@ -1239,6 +1239,20 @@ static RefPtr<StyleValue const> interpolate_value_impl(DOM::Element& element, Ca
return {};
return Rect { *interpolated_rect_box };
},
[&](Circle const& from_circle) -> Optional<BasicShape> {
// If both shapes are the same type, that type is ellipse() or circle(), and the radiuses are specified
// as <length-percentage> (rather than keywords), interpolate between each value in the shape functions.
auto const& to_circle = to_shape.get<Circle>();
if (!from_circle.radius.has<LengthPercentage>() || !to_circle.radius.has<LengthPercentage>())
return {};
auto interpolated_radius = interpolate_length_percentage(calculation_context, from_circle.radius.get<LengthPercentage>(), to_circle.radius.get<LengthPercentage>(), delta);
if (!interpolated_radius.has_value())
return {};
auto interpolated_position = interpolate_value(element, calculation_context, from_circle.position, to_circle.position, delta, allow_discrete);
if (!interpolated_position)
return {};
return Circle { *interpolated_radius, interpolated_position->as_position() };
},
[&](Polygon const& from_polygon) -> Optional<BasicShape> {
// If both shapes are of type polygon(), both polygons have the same number of vertices, and use the
// same <'fill-rule'>, interpolate between each value in the shape functions.