virtualx-engine/thirdparty/msdfgen/core/contour-combiners.h

#pragma once

#include "Shape.h"
#include "edge-selectors.h"

namespace msdfgen {

/// Simply selects the nearest contour.
template <class EdgeSelector>
class SimpleContourCombiner {

public:
    typedef EdgeSelector EdgeSelectorType;
    typedef typename EdgeSelector::DistanceType DistanceType;

    explicit SimpleContourCombiner(const Shape &shape);
    void reset(const Point2 &p);
    EdgeSelector &edgeSelector(int i);
    DistanceType distance() const;

private:
    EdgeSelector shapeEdgeSelector;

};

/// Selects the nearest contour that actually forms a border between filled and unfilled area.
template <class EdgeSelector>
class OverlappingContourCombiner {

public:
    typedef EdgeSelector EdgeSelectorType;
    typedef typename EdgeSelector::DistanceType DistanceType;

    explicit OverlappingContourCombiner(const Shape &shape);
    void reset(const Point2 &p);
    EdgeSelector &edgeSelector(int i);
    DistanceType distance() const;

private:
    Point2 p;
    std::vector<int> windings;
    std::vector<EdgeSelector> edgeSelectors;

};

}