PrimitivePath.h

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#pragma once
#include "common/Export.h"
 
 
#include <glm/vec2.hpp>
 
#include <cstdint>
#include <vector>
 
namespace eve::graphics {
 
enum class PathFillRule : std::uint8_t { NonZero, EvenOdd };
 
struct FlattenedContour2D {
    std::vector<glm::vec2> points;
    bool                   closed = false;
};
 
class EVENGINE_API_BACKENDS Path2D {
public:
    Path2D& moveTo(glm::vec2 point);
    Path2D& lineTo(glm::vec2 point);
    Path2D& quadTo(glm::vec2 control, glm::vec2 point);
    Path2D& cubicTo(glm::vec2 control1, glm::vec2 control2, glm::vec2 point);
    Path2D& close();
    void clear() noexcept;
 
    [[nodiscard]] std::vector<FlattenedContour2D> flatten(float tolerance = 0.25f, std::uint32_t maxDepth = 12) const;
 
    void                       setFillRule(PathFillRule rule) noexcept { fillRule_ = rule; }
    [[nodiscard]] PathFillRule fillRule() const noexcept { return fillRule_; }
    [[nodiscard]] bool         empty() const noexcept { return verbs_.empty(); }
 
private:
    enum class Verb : std::uint8_t { Move, Line, Quad, Cubic, Close };
 
    std::vector<Verb>      verbs_;
    std::vector<glm::vec2> points_;
    PathFillRule           fillRule_    = PathFillRule::NonZero;
    bool                   contourOpen_ = false;
};
 
}  // namespace eve::graphics