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/*
* Copyright 2012 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef SkPathWriter_DEFINED
#define SkPathWriter_DEFINED
#include "SkPath.h"
#include "SkTArray.h"
#include "SkTDArray.h"
class SkOpPtT;
// Construct the path one contour at a time.
// If the contour is closed, copy it to the final output.
// Otherwise, keep the partial contour for later assembly.
class SkPathWriter {
public:
SkPathWriter(SkPath& path);
void assemble();
void conicTo(const SkPoint& pt1, const SkOpPtT* pt2, SkScalar weight);
void cubicTo(const SkPoint& pt1, const SkPoint& pt2, const SkOpPtT* pt3);
bool deferredLine(const SkOpPtT* pt);
void deferredMove(const SkOpPtT* pt);
void finishContour();
bool hasMove() const { return !fFirstPtT; }
void init();
bool isClosed() const;
const SkPath* nativePath() const { return fPathPtr; }
void quadTo(const SkPoint& pt1, const SkOpPtT* pt2);
private:
bool changedSlopes(const SkOpPtT* pt) const;
void close();
const SkTDArray<const SkOpPtT*>& endPtTs() const { return fEndPtTs; }
void lineTo();
bool matchedLast(const SkOpPtT*) const;
void moveTo();
const SkTArray<SkPath>& partials() const { return fPartials; }
bool someAssemblyRequired();
void update(const SkOpPtT* pt);
SkPath fCurrent; // contour under construction
SkTArray<SkPath> fPartials; // contours with mismatched starts and ends
SkTDArray<const SkOpPtT*> fEndPtTs; // possible pt values for partial starts and ends
SkPath* fPathPtr; // closed contours are written here
const SkOpPtT* fDefer[2]; // [0] deferred move, [1] deferred line
const SkOpPtT* fFirstPtT; // first in current contour
};
#endif /* defined(__PathOps__SkPathWriter__) */
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