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/*
* Copyright (C) 2014-2015 Apple Inc. All rights reserved.
* Copyright (C) 2025 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,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* 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.
*/
#pragma once
#include <WebCore/FloatPoint.h>
#include <memory>
#include <wtf/Vector.h>
namespace WebCore {
class FloatPointGraph {
WTF_MAKE_NONCOPYABLE(FloatPointGraph);
public:
FloatPointGraph() = default;
FloatPointGraph(FloatPointGraph&&) = default;
FloatPointGraph& operator=(FloatPointGraph&&) = default;
class Node : public FloatPoint {
WTF_MAKE_TZONE_ALLOCATED(Node);
WTF_MAKE_NONCOPYABLE(Node);
public:
Node(FloatPoint point)
: FloatPoint(point)
{
}
const Vector<Node*>& nextPoints() const { return m_nextPoints; }
void addNextPoint(Node* node)
{
if (!m_nextPoints.contains(node))
m_nextPoints.append(node);
}
bool isVisited() const { return m_visited; }
void visit() { m_visited = true; }
void reset() { m_visited = false; m_nextPoints.clear(); }
private:
Vector<Node*> m_nextPoints;
bool m_visited { false };
};
using Edge = std::pair<Node*, Node*>;
using Polygon = Vector<Edge>;
static std::pair<FloatPointGraph, Vector<Polygon>> polygonsForRect(const Vector<FloatRect>&);
Node* findOrCreateNode(FloatPoint);
void reset();
private:
Vector<std::unique_ptr<Node>> m_allNodes;
};
} // namespace WebCore
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