| // Copyright 2015 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 CubicBezierControlPoints_h |
| #define CubicBezierControlPoints_h |
| |
| #include "wtf/Allocator.h" |
| #include <cstddef> |
| |
| namespace blink { |
| |
| struct CubicBezierControlPoints { |
| DISALLOW_NEW_EXCEPT_PLACEMENT_NEW(); |
| double x0, y0; |
| double x1, y1; |
| double x2, y2; |
| double x3, y3; |
| |
| CubicBezierControlPoints() |
| : x0(0) |
| , y0(0) |
| , x1(0) |
| , y1(0) |
| , x2(0) |
| , y2(0) |
| , x3(0) |
| , y3(0) |
| { } |
| |
| CubicBezierControlPoints(double x0, double y0, double x1, double y1, |
| double x2, double y2, double x3, double y3) |
| : x0(x0) |
| , y0(y0) |
| , x1(x1) |
| , y1(y1) |
| , x2(x2) |
| , y2(y2) |
| , x3(x3) |
| , y3(y3) |
| { } |
| |
| void divide(double t, CubicBezierControlPoints& left, CubicBezierControlPoints& right) const; |
| size_t findTurningPoints(double& left, double& right) const; |
| bool findIntersection(double intersectionY, double& intersectionX) const; |
| |
| private: |
| bool findInflexionPoint(double& solution) const; |
| }; |
| |
| } // namespace blink |
| |
| #endif |
