56 lines
2 KiB
C
56 lines
2 KiB
C
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#pragma once
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#include <vector>
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#include "Contour.h"
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#include "Scanline.h"
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namespace msdfgen {
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// Threshold of the dot product of adjacent edge directions to be considered convergent.
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#define MSDFGEN_CORNER_DOT_EPSILON .000001
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// The proportional amount by which a curve's control point will be adjusted to eliminate convergent corners.
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#define MSDFGEN_DECONVERGENCE_FACTOR .000001
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/// Vector shape representation.
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class Shape {
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public:
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struct Bounds {
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double l, b, r, t;
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};
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/// The list of contours the shape consists of.
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std::vector<Contour> contours;
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/// Specifies whether the shape uses bottom-to-top (false) or top-to-bottom (true) Y coordinates.
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bool inverseYAxis;
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Shape();
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/// Adds a contour.
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void addContour(const Contour &contour);
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#ifdef MSDFGEN_USE_CPP11
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void addContour(Contour &&contour);
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#endif
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/// Adds a blank contour and returns its reference.
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Contour & addContour();
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/// Normalizes the shape geometry for distance field generation.
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void normalize();
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/// Performs basic checks to determine if the object represents a valid shape.
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bool validate() const;
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/// Adjusts the bounding box to fit the shape.
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void bound(double &l, double &b, double &r, double &t) const;
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/// Adjusts the bounding box to fit the shape border's mitered corners.
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void boundMiters(double &l, double &b, double &r, double &t, double border, double miterLimit, int polarity) const;
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/// Computes the minimum bounding box that fits the shape, optionally with a (mitered) border.
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Bounds getBounds(double border = 0, double miterLimit = 0, int polarity = 0) const;
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/// Outputs the scanline that intersects the shape at y.
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void scanline(Scanline &line, double y) const;
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/// Returns the total number of edge segments
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int edgeCount() const;
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/// Assumes its contours are unoriented (even-odd fill rule). Attempts to orient them to conform to the non-zero winding rule.
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void orientContours();
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};
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}
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