1 /* 2 * Copyright 2012 Google Inc. 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 #ifndef SkPathWriter_DEFINED 8 #define SkPathWriter_DEFINED 9 10 #include "SkPath.h" 11 #include "SkTArray.h" 12 #include "SkTDArray.h" 13 14 class SkOpPtT; 15 16 // Construct the path one contour at a time. 17 // If the contour is closed, copy it to the final output. 18 // Otherwise, keep the partial contour for later assembly. 19 20 class SkPathWriter { 21 public: 22 SkPathWriter(SkPath& path); 23 void assemble(); 24 void conicTo(const SkPoint& pt1, const SkOpPtT* pt2, SkScalar weight); 25 void cubicTo(const SkPoint& pt1, const SkPoint& pt2, const SkOpPtT* pt3); 26 bool deferredLine(const SkOpPtT* pt); 27 void deferredMove(const SkOpPtT* pt); 28 void finishContour(); 29 bool hasMove() const { return !fFirstPtT; } 30 void init(); 31 bool isClosed() const; 32 const SkPath* nativePath() const { return fPathPtr; } 33 void quadTo(const SkPoint& pt1, const SkOpPtT* pt2); 34 35 private: 36 bool changedSlopes(const SkOpPtT* pt) const; 37 void close(); 38 const SkTDArray<const SkOpPtT*>& endPtTs() const { return fEndPtTs; } 39 void lineTo(); 40 bool matchedLast(const SkOpPtT*) const; 41 void moveTo(); 42 const SkTArray<SkPath>& partials() const { return fPartials; } 43 bool someAssemblyRequired(); 44 void update(const SkOpPtT* pt); 45 46 SkPath fCurrent; // contour under construction 47 SkTArray<SkPath> fPartials; // contours with mismatched starts and ends 48 SkTDArray<const SkOpPtT*> fEndPtTs; // possible pt values for partial starts and ends 49 SkPath* fPathPtr; // closed contours are written here 50 const SkOpPtT* fDefer[2]; // [0] deferred move, [1] deferred line 51 const SkOpPtT* fFirstPtT; // first in current contour 52 }; 53 54 #endif /* defined(__PathOps__SkPathWriter__) */ 55
