206     static ReductionType CheckCubicLinear(const SkPoint cubic[4], SkPoint reduction[3],
210     ResultType compareQuadCubic(const SkPoint cubic[4], SkQuadConstruct* );
216     bool cubicMidOnLine(const SkPoint cubic[4], const SkQuadConstruct* ) const;
217     void cubicPerpRay(const SkPoint cubic[4], SkScalar t, SkPoint* tPt, SkPoint* onPt,
219     void cubicQuadEnds(const SkPoint cubic[4], SkQuadConstruct* );
220     void cubicQuadMid(const SkPoint cubic[4], const SkQuadConstruct* , SkPoint* mid) const;
221     bool cubicStroke(const SkPoint cubic[4], SkQuadConstruct* );
231     void setCubicEndNormal(const SkPoint cubic[4],
241     ResultType tangentsMeet(const SkPoint cubic[4], SkQuadConstruct* );
463 void SkPathStroker::setCubicEndNormal(const SkPoint cubic[4], const SkVector& normalAB,  in setCubicEndNormal()
465     SkVector    ab = cubic[1] - cubic[0];  in setCubicEndNormal()
466     SkVector    cd = cubic[3] - cubic[2];  in setCubicEndNormal()
476         ab = cubic[2] - cubic[0];  in setCubicEndNormal()
480         cd = cubic[3] - cubic[1];  in setCubicEndNormal()
539 static bool cubic_in_line(const SkPoint cubic[4]) {  in cubic_in_line()
545             SkVector testDiff = cubic[inner] - cubic[index];  in cubic_in_line()
565     return pt_to_line(cubic[mid1], cubic[outer1], cubic[outer2]) <= lineSlop  in cubic_in_line()
566             && pt_to_line(cubic[mid2], cubic[outer1], cubic[outer2]) <= lineSlop;  in cubic_in_line()
604 SkPathStroker::ReductionType SkPathStroker::CheckCubicLinear(const SkPoint cubic[4],  in CheckCubicLinear()
606     bool degenerateAB = degenerate_vector(cubic[1] - cubic[0]);  in CheckCubicLinear()
607     bool degenerateBC = degenerate_vector(cubic[2] - cubic[1]);  in CheckCubicLinear()
608     bool degenerateCD = degenerate_vector(cubic[3] - cubic[2]);  in CheckCubicLinear()
615     if (!cubic_in_line(cubic)) {  in CheckCubicLinear()
616         *tangentPtPtr = degenerateAB ? &cubic[2] : &cubic[1];  in CheckCubicLinear()
620     int count = SkFindCubicMaxCurvature(cubic, tValues);  in CheckCubicLinear()
628         SkEvalCubicAt(cubic, t, &reduction[rCount], nullptr, nullptr);  in CheckCubicLinear()
629         if (reduction[rCount] != cubic[0] && reduction[rCount] != cubic[3]) {  in CheckCubicLinear()
810 void SkPathStroker::cubicPerpRay(const SkPoint cubic[4], SkScalar t, SkPoint* tPt, SkPoint* onPt,  in cubicPerpRay()
814     SkEvalCubicAt(cubic, t, tPt, &dxy, nullptr);  in cubicPerpRay()
816         const SkPoint* cPts = cubic;  in cubicPerpRay()
818             dxy = cubic[2] - cubic[0];  in cubicPerpRay()
820             dxy = cubic[3] - cubic[1];  in cubicPerpRay()
824             SkChopCubicAt(cubic, chopped, t);  in cubicPerpRay()
839 void SkPathStroker::cubicQuadEnds(const SkPoint cubic[4], SkQuadConstruct* quadPts) {  in cubicQuadEnds()
842         this->cubicPerpRay(cubic, quadPts->fStartT, &cubicStartPt, &quadPts->fQuad[0],  in cubicQuadEnds()
848         this->cubicPerpRay(cubic, quadPts->fEndT, &cubicEndPt, &quadPts->fQuad[2],  in cubicQuadEnds()
854 void SkPathStroker::cubicQuadMid(const SkPoint cubic[4], const SkQuadConstruct* quadPts,  in cubicQuadMid()
857     this->cubicPerpRay(cubic, quadPts->fMidT, &cubicMidPt, mid, nullptr);  in cubicQuadMid()
929 SkPathStroker::ResultType SkPathStroker::tangentsMeet(const SkPoint cubic[4],  in tangentsMeet()
931     this->cubicQuadEnds(cubic, quadPts);  in tangentsMeet()
1041 SkPathStroker::ResultType SkPathStroker::compareQuadCubic(const SkPoint cubic[4],  in compareQuadCubic()
1044     this->cubicQuadEnds(cubic, quadPts);  in compareQuadCubic()
1052     this->cubicPerpRay(cubic, quadPts->fMidT, &ray[1], &ray[0], nullptr);  in compareQuadCubic()
1106 bool SkPathStroker::cubicMidOnLine(const SkPoint cubic[4], const SkQuadConstruct* quadPts) const {  in cubicMidOnLine()
1108     this->cubicQuadMid(cubic, quadPts, &strokeMid);  in cubicMidOnLine()
1113 bool SkPathStroker::cubicStroke(const SkPoint cubic[4], SkQuadConstruct* quadPts) {  in cubicStroke()
1115         ResultType resultType = this->tangentsMeet(cubic, quadPts);  in cubicStroke()
1119                     fInvResScale)) && cubicMidOnLine(cubic, quadPts)) {  in cubicStroke()
1128         ResultType resultType = this->compareQuadCubic(cubic, quadPts);  in cubicStroke()
1158     if (!this->cubicStroke(cubic, &half)) {  in cubicStroke()
1166     if (!this->cubicStroke(cubic, &half)) {  in cubicStroke()
1239     const SkPoint cubic[4] = { fPrevPt, pt1, pt2, pt3 };  in cubicTo()  local
1242     ReductionType reductionType = CheckCubicLinear(cubic, reduction, &tangentPt);  in cubicTo()
1275     int count = SkFindCubicInflections(cubic, tValues);  in cubicTo()
1281         (void) this->cubicStroke(cubic, &quadPts);  in cubicTo()
1283         (void) this->cubicStroke(cubic, &quadPts);  in cubicTo()
1286     SkScalar cusp = SkFindCubicCusp(cubic);  in cubicTo()
1289         SkEvalCubicAt(cubic, cusp, &cuspLoc, nullptr, nullptr);  in cubicTo()
1294     this->setCubicEndNormal(cubic, normalAB, unitAB, &normalCD, &unitCD);  in cubicTo()