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      1 /*
      2  * Copyright (C) 2014 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 #ifndef REVEALCLIP_H
     17 #define REVEALCLIP_H
     18 
     19 #include <SkPath.h>
     20 
     21 #include "Rect.h"
     22 
     23 namespace android {
     24 namespace uirenderer {
     25 
     26 class RevealClip {
     27 public:
     28     RevealClip()
     29             : mShouldClip(false)
     30             , mX(0)
     31             , mY(0)
     32             , mRadius(0) {}
     33 
     34     void set(bool shouldClip, float x, float y, float radius) {
     35         mShouldClip = shouldClip;
     36         mX = x;
     37         mY = y;
     38         mRadius = radius;
     39 
     40         mPath.rewind();
     41         if (mShouldClip) {
     42             mPath.addCircle(x, y, radius);
     43         }
     44     }
     45 
     46     bool willClip() const {
     47         return mShouldClip;
     48     }
     49 
     50     void getBounds(Rect* outBounds) const {
     51         outBounds->set(mX - mRadius, mY - mRadius,
     52                 mX + mRadius, mY + mRadius);
     53     }
     54     float getRadius() const { return mRadius; }
     55 
     56     const SkPath* getPath() const {
     57         if (!mShouldClip) return NULL;
     58 
     59         return &mPath;
     60     }
     61 
     62 private:
     63     bool mShouldClip;
     64     float mX;
     65     float mY;
     66     float mRadius;
     67     SkPath mPath;
     68 };
     69 
     70 } /* namespace uirenderer */
     71 } /* namespace android */
     72 
     73 #endif /* REVEALCLIP_H */
     74