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/*
* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
* All rights reserved.
*
* 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 THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 THE COPYRIGHT HOLDER 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 <AK/HashMap.h>
#include <AK/Optional.h>
#include <AK/Vector.h>
#include <LibGfx/FloatPoint.h>
#include <LibGfx/Forward.h>
namespace Gfx {
class Path {
public:
struct Segment {
enum class Type {
Invalid,
MoveTo,
LineTo,
QuadraticBezierCurveTo,
};
Type type { Type::Invalid };
FloatPoint point;
Optional<FloatPoint> through {};
};
Path() { }
void move_to(const FloatPoint& point)
{
m_segments.append({ Segment::Type::MoveTo, point });
}
void line_to(const FloatPoint& point)
{
m_segments.append({ Segment::Type::LineTo, point });
invalidate_split_lines();
}
void quadratic_bezier_curve_to(const FloatPoint& through, const FloatPoint& point)
{
m_segments.append({ Segment::Type::QuadraticBezierCurveTo, point, through });
invalidate_split_lines();
}
void close();
void close_all_subpaths();
struct LineSegment {
FloatPoint from, to;
float inverse_slope;
float x_of_minimum_y;
float maximum_y;
float minimum_y;
float x;
};
const Vector<Segment>& segments() const { return m_segments; }
const auto& split_lines()
{
if (m_split_lines.has_value())
return m_split_lines.value();
segmentize_path();
ASSERT(m_split_lines.has_value());
return m_split_lines.value();
}
String to_string() const;
private:
void invalidate_split_lines()
{
m_split_lines.clear();
}
void segmentize_path();
Vector<Segment> m_segments;
Optional<Vector<LineSegment>> m_split_lines {};
};
inline const LogStream& operator<<(const LogStream& stream, const Path& path)
{
return stream << path.to_string();
}
}
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