228     VertexList() : fHead(nullptr), fTail(nullptr) {}  in VertexList()
229     VertexList(Vertex* head, Vertex* tail) : fHead(head), fTail(tail) {}  in VertexList()
231     Vertex* fTail;  member
233         list_insert<Vertex, &Vertex::fPrev, &Vertex::fNext>(v, prev, next, &fHead, &fTail);  in insert()
236         insert(v, fTail, nullptr);  in append()
242         if (fTail) {  in append()
243             fTail->fNext = list.fHead;  in append()
244             list.fHead->fPrev = fTail;  in append()
248         fTail = list.fTail;  in append()
254         list_remove<Vertex, &Vertex::fPrev, &Vertex::fNext>(v, &fHead, &fTail);  in remove()
257         if (fHead && fTail) {  in close()
258             fTail->fNext = fHead;  in close()
259             fHead->fPrev = fTail;  in close()
440     EdgeList() : fHead(nullptr), fTail(nullptr) {}  in EdgeList()
442     Edge* fTail;  member
444         list_insert<Edge, &Edge::fLeft, &Edge::fRight>(edge, prev, next, &fHead, &fTail);  in insert()
447         insert(e, fTail, nullptr);  in append()
450         list_remove<Edge, &Edge::fLeft, &Edge::fRight>(edge, &fHead, &fTail);  in remove()
458         if (fHead && fTail) {  in close()
459             fTail->fRight = fHead;  in close()
460             fHead->fLeft = fTail;  in close()
508         , fTail(nullptr)  in Poly()
565             while (v != vertices.fTail) {  in emit()
611         if (!fTail) {  in addEdge()
612             fHead = fTail = alloc.make<MonotonePoly>(e, side);  in addEdge()
614         } else if (e->fBottom == fTail->fLastEdge->fBottom) {  in addEdge()
616         } else if (side == fTail->fSide) {  in addEdge()
617             fTail->addEdge(e);  in addEdge()
620             e = alloc.make<Edge>(fTail->fLastEdge->fBottom, e->fBottom, 1, Edge::Type::kInner);  in addEdge()
621             fTail->addEdge(e);  in addEdge()
628                 m->fPrev = fTail;  in addEdge()
629                 fTail->fNext = m;  in addEdge()
630                 fTail = m;  in addEdge()
645     Vertex* lastVertex() const { return fTail ? fTail->fLastEdge->fBottom : fFirstVertex; }  in lastVertex()
649     MonotonePoly* fTail;  member
853     for (prev = edges->fTail; prev != nullptr; prev = prev->fLeft) {  in find_enclosing_edges()
1191             v->fID = mesh->fTail->fID + 1.0f;  in create_sorted_vertex()
1278         Vertex* prev = contour->fTail;  in sanitize_contours()
1329         Vertex* prev = contour->fTail;  in build_edges()
1407     VertexList back(slow->fNext, vertices->fTail);  in merge_sort()
1408     front.fTail->fNext = back.fHead->fPrev = nullptr;  in merge_sort()
1413     vertices->fHead = vertices->fTail = nullptr;  in merge_sort()
1524     SkASSERT(!activeEdges.fHead && !activeEdges.fTail);  in simplify()
1595                         if (leftPoly->fTail && leftPoly->fTail->fSide == Poly::kLeft_Side) {  in tessellate()
1707     Edge* prevEdge = boundary->fTail;  in simplify_boundary()
1732                 prevEdge = boundary->fTail;  in simplify_boundary()
1874     Edge* prevEdge = boundary->fTail;  in stroke_boundary()
1967                 if (!inversion(innerVertices.fTail, innerVertex1, prevEdge, c)) {  in stroke_boundary()
1970                 if (!inversion(outerVertices.fTail, outerVertex1, prevEdge, c)) {  in stroke_boundary()
1984                 if (!inversion(innerVertices.fTail, innerVertex, prevEdge, c)) {  in stroke_boundary()
1987                 if (!inversion(outerVertices.fTail, outerVertex, prevEdge, c)) {  in stroke_boundary()
2000     if (!inversion(innerVertices.fTail, innerVertices.fHead, prevEdge, c)) {  in stroke_boundary()
2003     if (!inversion(outerVertices.fTail, outerVertices.fHead, prevEdge, c)) {  in stroke_boundary()
2016     connect(innerVertices.fTail, innerVertices.fHead, Edge::Type::kInner, c, alloc, innerWinding);  in stroke_boundary()
2020     connect(outerVertices.fTail, outerVertices.fHead, Edge::Type::kOuter, c, alloc, outerWinding);  in stroke_boundary()
2149             outerMesh->fHead = outerMesh->fTail = nullptr;  in contours_to_polys()