michael@0: /*
michael@0:  * Copyright 2012 Google Inc.
michael@0:  *
michael@0:  * Use of this source code is governed by a BSD-style license that can be
michael@0:  * found in the LICENSE file.
michael@0:  */
michael@0: #ifndef SkOpEdgeBuilder_DEFINED
michael@0: #define SkOpEdgeBuilder_DEFINED
michael@0: 
michael@0: #include "SkOpContour.h"
michael@0: #include "SkPathWriter.h"
michael@0: #include "SkTArray.h"
michael@0: 
michael@0: class SkOpEdgeBuilder {
michael@0: public:
michael@0:     SkOpEdgeBuilder(const SkPathWriter& path, SkTArray<SkOpContour>& contours)
michael@0:         : fPath(path.nativePath())
michael@0:         , fContours(contours)
michael@0:         , fAllowOpenContours(true) {
michael@0:         init();
michael@0:     }
michael@0: 
michael@0:     SkOpEdgeBuilder(const SkPath& path, SkTArray<SkOpContour>& contours)
michael@0:         : fPath(&path)
michael@0:         , fContours(contours)
michael@0:         , fAllowOpenContours(false) {
michael@0:         init();
michael@0:     }
michael@0: 
michael@0:     void complete() {
michael@0:         if (fCurrentContour && fCurrentContour->segments().count()) {
michael@0:             fCurrentContour->complete();
michael@0:             fCurrentContour = NULL;
michael@0:         }
michael@0:     }
michael@0: 
michael@0:     SkPathOpsMask xorMask() const {
michael@0:         return fXorMask[fOperand];
michael@0:     }
michael@0: 
michael@0:     void addOperand(const SkPath& path);
michael@0:     bool finish();
michael@0:     void init();
michael@0: 
michael@0: private:
michael@0:     void closeContour(const SkPoint& curveEnd, const SkPoint& curveStart);
michael@0:     bool close();
michael@0:     int preFetch();
michael@0:     bool walk();
michael@0: 
michael@0:     const SkPath* fPath;
michael@0:     SkTArray<SkPoint, true> fPathPts;
michael@0:     SkTArray<uint8_t, true> fPathVerbs;
michael@0:     SkOpContour* fCurrentContour;
michael@0:     SkTArray<SkOpContour>& fContours;
michael@0:     SkPathOpsMask fXorMask[2];
michael@0:     int fSecondHalf;
michael@0:     bool fOperand;
michael@0:     bool fAllowOpenContours;
michael@0:     bool fUnparseable;
michael@0: };
michael@0: 
michael@0: #endif