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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 SkOpAngle_DEFINED
#define SkOpAngle_DEFINED
#include "SkLineParameters.h"
#include "SkPathOpsCurve.h"
#if DEBUG_ANGLE
#include "SkString.h"
#endif
class SkOpContour;
class SkOpPtT;
class SkOpSegment;
class SkOpSpanBase;
class SkOpSpan;
class SkOpAngle {
public:
enum IncludeType {
kUnaryWinding,
kUnaryXor,
kBinarySingle,
kBinaryOpp,
};
const SkOpAngle* debugAngle(int id) const;
const SkOpCoincidence* debugCoincidence() const;
SkOpContour* debugContour(int id) const;
int debugID() const {
return SkDEBUGRELEASE(fID, -1);
}
#if DEBUG_SORT
void debugLoop() const;
#endif
#if DEBUG_ANGLE
bool debugCheckCoincidence() const { return fCheckCoincidence; }
void debugCheckNearCoincidence() const;
SkString debugPart() const;
#endif
const SkOpPtT* debugPtT(int id) const;
const SkOpSegment* debugSegment(int id) const;
int debugSign() const;
const SkOpSpanBase* debugSpan(int id) const;
void debugValidate() const;
void debugValidateNext() const; // in debug builds, verify that angle loop is uncorrupted
double distEndRatio(double dist) const;
// available to testing only
void dump() const;
void dumpCurves() const;
void dumpLoop() const;
void dumpOne(bool functionHeader) const;
void dumpTo(const SkOpSegment* fromSeg, const SkOpAngle* ) const;
void dumpTest() const;
SkOpSpanBase* end() const {
return fEnd;
}
bool insert(SkOpAngle* );
SkOpSpanBase* lastMarked() const;
bool loopContains(const SkOpAngle* ) const;
int loopCount() const;
SkOpAngle* next() const {
return fNext;
}
SkOpAngle* previous() const;
SkOpSegment* segment() const;
void set(SkOpSpanBase* start, SkOpSpanBase* end);
void setLastMarked(SkOpSpanBase* marked) {
fLastMarked = marked;
}
SkOpSpanBase* start() const {
return fStart;
}
SkOpSpan* starter();
bool tangentsAmbiguous() const {
return fTangentsAmbiguous;
}
bool unorderable() const {
return fUnorderable;
}
private:
bool after(SkOpAngle* test);
void alignmentSameSide(const SkOpAngle* test, int* order) const;
int allOnOneSide(const SkOpAngle* test);
bool checkCrossesZero() const;
bool checkParallel(SkOpAngle* );
bool computeSector();
int convexHullOverlaps(const SkOpAngle* );
bool endToSide(const SkOpAngle* rh, bool* inside) const;
bool endsIntersect(SkOpAngle* );
int findSector(SkPath::Verb verb, double x, double y) const;
SkOpGlobalState* globalState() const;
bool merge(SkOpAngle* );
double midT() const;
bool midToSide(const SkOpAngle* rh, bool* inside) const;
bool oppositePlanes(const SkOpAngle* rh) const;
bool orderable(SkOpAngle* rh); // false == this < rh ; true == this > rh
void setSector();
void setSpans();
bool tangentsDiverge(const SkOpAngle* rh, double s0xt0);
SkDCurve fOriginalCurvePart; // the curve from start to end
SkDCurveSweep fPart; // the curve from start to end offset as needed
double fSide;
SkLineParameters fTangentHalf; // used only to sort a pair of lines or line-like sections
SkOpAngle* fNext;
SkOpSpanBase* fLastMarked;
SkOpSpanBase* fStart;
SkOpSpanBase* fEnd;
SkOpSpanBase* fComputedEnd;
int fSectorMask;
int8_t fSectorStart; // in 32nds of a circle
int8_t fSectorEnd;
bool fUnorderable;
bool fComputeSector;
bool fComputedSector;
bool fCheckCoincidence;
bool fTangentsAmbiguous;
SkDEBUGCODE(int fID);
friend class PathOpsAngleTester;
};
#endif
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