1 2 /* 3 * Copyright 2011 Google Inc. 4 * 5 * Use of this source code is governed by a BSD-style license that can be 6 * found in the LICENSE file. 7 */ 8 #ifndef SkEdgeBuilder_DEFINED 9 #define SkEdgeBuilder_DEFINED 10 11 #include "SkChunkAlloc.h" 12 #include "SkRect.h" 13 #include "SkTDArray.h" 14 15 struct SkEdge; 16 class SkEdgeClipper; 17 class SkPath; 18 19 class SkEdgeBuilder { 20 public: 21 SkEdgeBuilder(); 22 23 // returns the number of built edges. The array of those edge pointers 24 // is returned from edgeList(). 25 int build(const SkPath& path, const SkIRect* clip, int shiftUp); 26 27 SkEdge** edgeList() { return fEdgeList; } 28 29 private: 30 SkChunkAlloc fAlloc; 31 SkTDArray<SkEdge*> fList; 32 33 /* 34 * If we're in general mode, we allcoate the pointers in fList, and this 35 * will point at fList.begin(). If we're in polygon mode, fList will be 36 * empty, as we will have preallocated room for the pointers in fAlloc's 37 * block, and fEdgeList will point into that. 38 */ 39 SkEdge** fEdgeList; 40 41 int fShiftUp; 42 43 public: 44 void addLine(const SkPoint pts[]); 45 void addQuad(const SkPoint pts[]); 46 void addCubic(const SkPoint pts[]); 47 void addClipper(SkEdgeClipper*); 48 49 int buildPoly(const SkPath& path, const SkIRect* clip, int shiftUp); 50 }; 51 52 #endif 53
