/*

 * 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 "src/pathops/SkLineParameters.h"

#include "src/pathops/SkPathOpsCurve.h"

#if DEBUG_ANGLE

#include "include/core/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;

    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;

    int lineOnOneSide(const SkDPoint& origin, const SkDVector& line, const SkOpAngle* test,

                      bool useOriginal) const;

    int lineOnOneSide(const SkOpAngle* test, bool useOriginal);

    int linesOnOriginalSide(const SkOpAngle* test);

    bool merge(SkOpAngle* );

    double midT() const;

    bool midToSide(const SkOpAngle* rh, bool* inside) const;

    bool oppositePlanes(const SkOpAngle* rh) const;

    int orderable(SkOpAngle* rh);  // false == this < rh ; true == this > rh; -1 == unorderable

    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