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 SkBoundaryPatch_DEFINED 9 #define SkBoundaryPatch_DEFINED 10 11 #include "SkPoint.h" 12 #include "SkRefCnt.h" 13 14 class SkBoundary : public SkRefCnt { 15 public: 16 17 18 // These must be 0, 1, 2, 3 for efficiency in the subclass implementations 19 enum Edge { 20 kTop = 0, 21 kRight = 1, 22 kBottom = 2, 23 kLeft = 3 24 }; 25 // Edge index goes clockwise around the boundary, beginning at the "top" 26 virtual SkPoint eval(Edge, SkScalar unitInterval) = 0; 27 28 private: 29 typedef SkRefCnt INHERITED; 30 }; 31 32 class SkBoundaryPatch { 33 public: 34 SkBoundaryPatch(); 35 ~SkBoundaryPatch(); 36 37 SkBoundary* getBoundary() const { return fBoundary; } 38 SkBoundary* setBoundary(SkBoundary*); 39 40 SkPoint eval(SkScalar unitU, SkScalar unitV); 41 bool evalPatch(SkPoint verts[], int rows, int cols); 42 43 private: 44 SkBoundary* fBoundary; 45 }; 46 47 //////////////////////////////////////////////////////////////////////// 48 49 class SkLineBoundary : public SkBoundary { 50 public: 51 SkPoint fPts[4]; 52 53 // override 54 virtual SkPoint eval(Edge, SkScalar); 55 }; 56 57 class SkCubicBoundary : public SkBoundary { 58 public: 59 // the caller sets the first 12 entries. The 13th is used by the impl. 60 SkPoint fPts[13]; 61 62 // override 63 virtual SkPoint eval(Edge, SkScalar); 64 }; 65 66 #endif 67
