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| 1 // Copyright 2014 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. |
| 4 |
| 5 #ifndef UI_GFX_GEOMETRY_CUBIC_BEZIER_H_ |
| 6 #define UI_GFX_GEOMETRY_CUBIC_BEZIER_H_ |
| 7 |
| 8 #include "base/macros.h" |
| 9 #include "ui/gfx/gfx_export.h" |
| 10 |
| 11 namespace gfx { |
| 12 |
| 13 class GFX_EXPORT CubicBezier { |
| 14 public: |
| 15 CubicBezier(double x1, double y1, double x2, double y2); |
| 16 ~CubicBezier(); |
| 17 |
| 18 // Returns an approximation of y at the given x. |
| 19 double Solve(double x) const; |
| 20 |
| 21 // Sets |min| and |max| to the bezier's minimum and maximium y values in the |
| 22 // interval [0, 1]. |
| 23 void Range(double* min, double* max) const; |
| 24 |
| 25 private: |
| 26 double x1_; |
| 27 double y1_; |
| 28 double x2_; |
| 29 double y2_; |
| 30 |
| 31 DISALLOW_ASSIGN(CubicBezier); |
| 32 }; |
| 33 |
| 34 } // namespace gfx |
| 35 |
| 36 #endif // UI_GFX_GEOMETRY_CUBIC_BEZIER_H_ |
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