/* * Copyright 2012 Google Inc. * * Use of this source code is governed by a BSD-style license that can be * found in the LICENSE file. */ #if !defined CUBIC_UTILITIES_H #define CUBIC_UTILITIES_H #include "DataTypes.h" #include "SkTDArray.h" double calcPrecision(const Cubic& cubic); #if SK_DEBUG double calcPrecision(const Cubic& cubic, double t, double scale); #endif void chop_at(const Cubic& src, CubicPair& dst, double t); double cube_root(double x); int cubic_to_quadratics(const Cubic& cubic, double precision, SkTDArray& quadratics); void cubic_to_quadratics(const Cubic& cubic, double precision, SkTDArray& ts); void coefficients(const double* cubic, double& A, double& B, double& C, double& D); int cubicRootsValidT(double A, double B, double C, double D, double t[3]); int cubicRootsReal(double A, double B, double C, double D, double s[3]); void demote_cubic_to_quad(const Cubic& cubic, Quadratic& quad); double dx_at_t(const Cubic& , double t); double dy_at_t(const Cubic& , double t); //void dxdy_at_t(const Cubic& , double t, _Point& y); _Vector dxdy_at_t(const Cubic& cubic, double t); int find_cubic_inflections(const Cubic& src, double tValues[]); bool rotate(const Cubic& cubic, int zero, int index, Cubic& rotPath); void sub_divide(const Cubic& src, double t1, double t2, Cubic& dst); void sub_divide(const Cubic& , const _Point& a, const _Point& d, double t1, double t2, _Point [2]); _Point top(const Cubic& , double startT, double endT); void xy_at_t(const Cubic& , double t, double& x, double& y); _Point xy_at_t(const Cubic& , double t); extern const int gPrecisionUnit; #endif