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