1/*
2 * Copyright 2009 The Android Open Source Project
3 *
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
6 */
7
8
9#ifndef SkCubicClipper_DEFINED
10#define SkCubicClipper_DEFINED
11
12#include "include/core/SkPoint.h"
13#include "include/core/SkRect.h"
14
15/** This class is initialized with a clip rectangle, and then can be fed cubics,
16 which must already be monotonic in Y.
17
18 In the future, it might return a series of segments, allowing it to clip
19 also in X, to ensure that all segments fit in a finite coordinate system.
20 */
21class SkCubicClipper {
22public:
23 SkCubicClipper();
24
25 void setClip(const SkIRect& clip);
26
27 bool SK_WARN_UNUSED_RESULT clipCubic(const SkPoint src[4], SkPoint dst[4]);
28
29 static bool SK_WARN_UNUSED_RESULT ChopMonoAtY(const SkPoint pts[4], SkScalar y, SkScalar* t);
30private:
31 SkRect fClip;
32};
33
34#endif // SkCubicClipper_DEFINED
35