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      1 /*
      2  * Copyright (C) 2009 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 #ifndef SkCubicClipper_DEFINED
     18 #define SkCubicClipper_DEFINED
     19 
     20 #include "SkPoint.h"
     21 #include "SkRect.h"
     22 
     23 /** This class is initialized with a clip rectangle, and then can be fed cubics,
     24     which must already be monotonic in Y.
     25 
     26     In the future, it might return a series of segments, allowing it to clip
     27     also in X, to ensure that all segments fit in a finite coordinate system.
     28  */
     29 class SkCubicClipper {
     30 public:
     31     SkCubicClipper();
     32 
     33     void setClip(const SkIRect& clip);
     34 
     35     bool clipCubic(const SkPoint src[4], SkPoint dst[4]);
     36 
     37 private:
     38     SkRect      fClip;
     39 };
     40 
     41 #endif  // SkCubicClipper_DEFINED
     42