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/*
* Copyright (C) 2024 Samuel Weinig <sam@webkit.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "StylePolygonFunction.h"
#include "FloatRect.h"
#include "GeometryUtilities.h"
#include "Path.h"
#include "StylePrimitiveNumericTypes+Blending.h"
#include "StylePrimitiveNumericTypes+Evaluation.h"
#include <wtf/TinyLRUCache.h>
namespace WebCore {
namespace Style {
// MARK: - Path Caching
struct PolygonPathPolicy : TinyLRUCachePolicy<Vector<FloatPoint>, WebCore::Path> {
public:
static bool isKeyNull(const Vector<FloatPoint>& points)
{
return !points.size();
}
static WebCore::Path createValueForKey(const Vector<FloatPoint>& points)
{
return WebCore::Path(points);
}
};
static const WebCore::Path& cachedPolygonPath(const Vector<FloatPoint>& points)
{
static NeverDestroyed<TinyLRUCache<Vector<FloatPoint>, WebCore::Path, 4, PolygonPathPolicy>> cache;
return cache.get().get(points);
}
// MARK: - Path
WebCore::Path PathComputation<Polygon>::operator()(const Polygon& value, const FloatRect& boundingBox)
{
auto boundingLocation = boundingBox.location();
auto boundingSize = boundingBox.size();
auto points = value.vertices.value.map([&](const auto& vertex) {
return evaluate(vertex, boundingSize) + boundingLocation;
});
return cachedPolygonPath(points);
}
// MARK: - Wind Rule
WebCore::WindRule WindRuleComputation<Polygon>::operator()(const Polygon& value)
{
return (!value.fillRule || std::holds_alternative<CSS::Keyword::Nonzero>(*value.fillRule)) ? WindRule::NonZero : WindRule::EvenOdd;
}
// MARK: - Blending
auto Blending<Polygon>::canBlend(const Polygon& a, const Polygon& b) -> bool
{
return windRule(a) == windRule(b)
&& a.vertices.size() == b.vertices.size();
}
auto Blending<Polygon>::blend(const Polygon& a, const Polygon& b, const BlendingContext& context) -> Polygon
{
return {
.fillRule = a.fillRule,
.vertices = WebCore::Style::blend(a.vertices, b.vertices, context),
};
}
} // namespace Style
} // namespace WebCore
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