From 4c3f7d1290311456519ca2416590c7e62465b7f2 Mon Sep 17 00:00:00 2001 From: bruvzg <7645683+bruvzg@users.noreply.github.com> Date: Sun, 27 Dec 2020 15:30:33 +0200 Subject: Makes FontData importable resource. Adds multi-channel SDF font texture generation and rendering support. Adds per-font oversampling support. Adds FontData import plugins (for dynamic fonts, BMFonts and monospaced image fonts), font texture cache pre-generation and loading. Adds BMFont binary format and outline support. --- thirdparty/msdfgen/core/edge-segments.h | 122 ++++++++++++++++++++++++++++++++ 1 file changed, 122 insertions(+) create mode 100644 thirdparty/msdfgen/core/edge-segments.h (limited to 'thirdparty/msdfgen/core/edge-segments.h') diff --git a/thirdparty/msdfgen/core/edge-segments.h b/thirdparty/msdfgen/core/edge-segments.h new file mode 100644 index 0000000000..1c8fb599ff --- /dev/null +++ b/thirdparty/msdfgen/core/edge-segments.h @@ -0,0 +1,122 @@ + +#pragma once + +#include "Vector2.h" +#include "SignedDistance.h" +#include "EdgeColor.h" + +namespace msdfgen { + +// Parameters for iterative search of closest point on a cubic Bezier curve. Increase for higher precision. +#define MSDFGEN_CUBIC_SEARCH_STARTS 4 +#define MSDFGEN_CUBIC_SEARCH_STEPS 4 + +/// An abstract edge segment. +class EdgeSegment { + +public: + EdgeColor color; + + EdgeSegment(EdgeColor edgeColor = WHITE) : color(edgeColor) { } + virtual ~EdgeSegment() { } + /// Creates a copy of the edge segment. + virtual EdgeSegment * clone() const = 0; + /// Returns the point on the edge specified by the parameter (between 0 and 1). + virtual Point2 point(double param) const = 0; + /// Returns the direction the edge has at the point specified by the parameter. + virtual Vector2 direction(double param) const = 0; + /// Returns the change of direction (second derivative) at the point specified by the parameter. + virtual Vector2 directionChange(double param) const = 0; + /// Returns the minimum signed distance between origin and the edge. + virtual SignedDistance signedDistance(Point2 origin, double ¶m) const = 0; + /// Converts a previously retrieved signed distance from origin to pseudo-distance. + virtual void distanceToPseudoDistance(SignedDistance &distance, Point2 origin, double param) const; + /// Outputs a list of (at most three) intersections (their X coordinates) with an infinite horizontal scanline at y and returns how many there are. + virtual int scanlineIntersections(double x[3], int dy[3], double y) const = 0; + /// Adjusts the bounding box to fit the edge segment. + virtual void bound(double &l, double &b, double &r, double &t) const = 0; + + /// Reverses the edge (swaps its start point and end point). + virtual void reverse() = 0; + /// Moves the start point of the edge segment. + virtual void moveStartPoint(Point2 to) = 0; + /// Moves the end point of the edge segment. + virtual void moveEndPoint(Point2 to) = 0; + /// Splits the edge segments into thirds which together represent the original edge. + virtual void splitInThirds(EdgeSegment *&part1, EdgeSegment *&part2, EdgeSegment *&part3) const = 0; + +}; + +/// A line segment. +class LinearSegment : public EdgeSegment { + +public: + Point2 p[2]; + + LinearSegment(Point2 p0, Point2 p1, EdgeColor edgeColor = WHITE); + LinearSegment * clone() const; + Point2 point(double param) const; + Vector2 direction(double param) const; + Vector2 directionChange(double param) const; + double length() const; + SignedDistance signedDistance(Point2 origin, double ¶m) const; + int scanlineIntersections(double x[3], int dy[3], double y) const; + void bound(double &l, double &b, double &r, double &t) const; + + void reverse(); + void moveStartPoint(Point2 to); + void moveEndPoint(Point2 to); + void splitInThirds(EdgeSegment *&part1, EdgeSegment *&part2, EdgeSegment *&part3) const; + +}; + +/// A quadratic Bezier curve. +class QuadraticSegment : public EdgeSegment { + +public: + Point2 p[3]; + + QuadraticSegment(Point2 p0, Point2 p1, Point2 p2, EdgeColor edgeColor = WHITE); + QuadraticSegment * clone() const; + Point2 point(double param) const; + Vector2 direction(double param) const; + Vector2 directionChange(double param) const; + double length() const; + SignedDistance signedDistance(Point2 origin, double ¶m) const; + int scanlineIntersections(double x[3], int dy[3], double y) const; + void bound(double &l, double &b, double &r, double &t) const; + + void reverse(); + void moveStartPoint(Point2 to); + void moveEndPoint(Point2 to); + void splitInThirds(EdgeSegment *&part1, EdgeSegment *&part2, EdgeSegment *&part3) const; + + EdgeSegment * convertToCubic() const; + +}; + +/// A cubic Bezier curve. +class CubicSegment : public EdgeSegment { + +public: + Point2 p[4]; + + CubicSegment(Point2 p0, Point2 p1, Point2 p2, Point2 p3, EdgeColor edgeColor = WHITE); + CubicSegment * clone() const; + Point2 point(double param) const; + Vector2 direction(double param) const; + Vector2 directionChange(double param) const; + SignedDistance signedDistance(Point2 origin, double ¶m) const; + int scanlineIntersections(double x[3], int dy[3], double y) const; + void bound(double &l, double &b, double &r, double &t) const; + + void reverse(); + void moveStartPoint(Point2 to); + void moveEndPoint(Point2 to); + void splitInThirds(EdgeSegment *&part1, EdgeSegment *&part2, EdgeSegment *&part3) const; + + void deconverge(int param, double amount); + +}; + +} -- cgit v1.2.3