1736     Edge* prevEdge = boundary->fTail;  in simplify_boundary()  local
1738     get_edge_normal(prevEdge, &prevNormal);  in simplify_boundary()
1740         Vertex* prev = prevEdge->fWinding == 1 ? prevEdge->fTop : prevEdge->fBottom;  in simplify_boundary()
1743         double distNext = prevEdge->dist(next->fPoint);  in simplify_boundary()
1748             remove_edge(prevEdge, boundary);  in simplify_boundary()
1750             prevEdge = boundary->fTail;  in simplify_boundary()
1752             if (prevEdge) {  in simplify_boundary()
1753                 get_edge_normal(prevEdge, &prevNormal);  in simplify_boundary()
1763             remove_edge(prevEdge, boundary);  in simplify_boundary()
1766                 prevEdge = join->fLeft;  in simplify_boundary()
1769                 prevEdge = boundary->fTail;  in simplify_boundary()
1772             get_edge_normal(prevEdge, &prevNormal);  in simplify_boundary()
1774             prevEdge = e;  in simplify_boundary()
1802     SSEdge* prevEdge = fEdge->fPrev->fPrev;  in apply()  local
1804     if (!prevEdge || !nextEdge || !prevEdge->fEdge || !nextEdge->fEdge) {  in apply()
1818     prevEdge->fNext = nextEdge->fPrev = ssv;  in apply()
1819     ssv->fPrev = prevEdge;  in apply()
1821     if (!prevEdge->fEdge || !nextEdge->fEdge) {  in apply()
1824     if (prevEdge->fEvent) {  in apply()
1825         prevEdge->fEvent->fEdge = nullptr;  in apply()
1830     if (prevEdge->fPrev == nextEdge->fNext) {  in apply()
1831         ss_connect(prevEdge->fPrev->fVertex, dest, c, alloc);  in apply()
1832         prevEdge->fEdge = nextEdge->fEdge = nullptr;  in apply()
1834         compute_bisector(prevEdge->fEdge, nextEdge->fEdge, dest, alloc);  in apply()
1835         SkASSERT(prevEdge != fEdge && nextEdge != fEdge);  in apply()
1837             create_event(prevEdge, events, alloc);  in apply()
1840             create_event(prevEdge, prevEdge->fPrev->fVertex, nextEdge, dest, events, c, alloc);  in apply()
1841             create_event(nextEdge, nextEdge->fNext->fVertex, prevEdge, dest, events, c, alloc);  in apply()
1958     Edge* prevEdge = boundary->fTail;  in stroke_boundary()  local
1959     Vertex* prevV = prevEdge->fWinding > 0 ? prevEdge->fTop : prevEdge->fBottom;  in stroke_boundary()
1961     get_edge_normal(prevEdge, &prevNormal);  in stroke_boundary()
1963     Line prevInner(prevEdge->fLine);  in stroke_boundary()
1965     Line prevOuter(prevEdge->fLine);  in stroke_boundary()
1981         if (!prevEdge->fLine.nearParallel(e->fLine) && prevInner.intersect(inner, &innerPoint) &&  in stroke_boundary()
2051                 if (!inversion(innerVertices.fTail, innerVertex1, prevEdge, c)) {  in stroke_boundary()
2054                 if (!inversion(outerVertices.fTail, outerVertex1, prevEdge, c)) {  in stroke_boundary()
2068                 if (!inversion(innerVertices.fTail, innerVertex, prevEdge, c)) {  in stroke_boundary()
2071                 if (!inversion(outerVertices.fTail, outerVertex, prevEdge, c)) {  in stroke_boundary()
2081         prevEdge = e;  in stroke_boundary()
2084     if (!inversion(innerVertices.fTail, innerVertices.fHead, prevEdge, c)) {  in stroke_boundary()
2087     if (!inversion(outerVertices.fTail, outerVertices.fHead, prevEdge, c)) {  in stroke_boundary()