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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 SkOpEdgeBuilder_DEFINED
#define SkOpEdgeBuilder_DEFINED
#include "SkOpContour.h"
#include "SkPathWriter.h"
#include "SkTArray.h"
#include "SkTDArray.h"
class SkOpEdgeBuilder {
public:
SkOpEdgeBuilder(const SkPathWriter& path, SkTArray<SkOpContour>& contours)
: fPath(path.nativePath())
, fContours(contours)
, fAllowOpenContours(true) {
init();
}
SkOpEdgeBuilder(const SkPath& path, SkTArray<SkOpContour>& contours)
: fPath(&path)
, fContours(contours)
, fAllowOpenContours(false) {
init();
}
void complete() {
if (fCurrentContour && fCurrentContour->segments().count()) {
fCurrentContour->complete();
fCurrentContour = NULL;
}
}
SkPathOpsMask xorMask() const {
return fXorMask[fOperand];
}
void addOperand(const SkPath& path);
bool finish();
void init();
private:
bool close();
int preFetch();
bool walk();
const SkPath* fPath;
SkTDArray<SkPoint> fPathPts;
SkTDArray<uint8_t> fPathVerbs;
SkOpContour* fCurrentContour;
SkTArray<SkOpContour>& fContours;
SkTDArray<SkPoint> fReducePts; // segments created on the fly
SkTDArray<int> fExtra; // -1 marks new contour, > 0 offsets into contour
SkPathOpsMask fXorMask[2];
const SkPoint* fFinalCurveStart;
const SkPoint* fFinalCurveEnd;
int fSecondHalf;
bool fOperand;
bool fAllowOpenContours;
bool fUnparseable;
};
#endif
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