text: // Copyright 2014 The Chromium Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  
  #ifndef UI_GFX_GEOMETRY_CUBIC_BEZIER_H_
  #define UI_GFX_GEOMETRY_CUBIC_BEZIER_H_
  
  #include "base/macros.h"
  #include "ui/gfx/gfx_export.h"
  
  namespace gfx {
  
  class GFX_EXPORT CubicBezier {
   public:
    CubicBezier(double x1, double y1, double x2, double y2);
    ~CubicBezier();
  
    // Returns an approximation of y at the given x.
    double Solve(double x) const;
  
    // Returns an approximation of dy/dx at the given x.
    double Slope(double x) const;
  
    // Sets |min| and |max| to the bezier's minimum and maximium y values in the
    // interval [0, 1].
    void Range(double* min, double* max) const;
  
   private:
    double x1_;
    double y1_;
    double x2_;
    double y2_;
  
    DISALLOW_ASSIGN(CubicBezier);
  };
  
  }  // namespace gfx
  
  #endif  // UI_GFX_GEOMETRY_CUBIC_BEZIER_H_
  