1 #ifndef SkBoundaryPatch_DEFINED 2 #define SkBoundaryPatch_DEFINED 3 4 #include "SkPoint.h" 5 #include "SkRefCnt.h" 6 7 class SkBoundary : public SkRefCnt { 8 public: 9 // These must be 0, 1, 2, 3 for efficiency in the subclass implementations 10 enum Edge { 11 kTop = 0, 12 kRight = 1, 13 kBottom = 2, 14 kLeft = 3 15 }; 16 // Edge index goes clockwise around the boundary, beginning at the "top" 17 virtual SkPoint eval(Edge, SkScalar unitInterval) = 0; 18 }; 19 20 class SkBoundaryPatch { 21 public: 22 SkBoundaryPatch(); 23 ~SkBoundaryPatch(); 24 25 SkBoundary* getBoundary() const { return fBoundary; } 26 SkBoundary* setBoundary(SkBoundary*); 27 28 SkPoint eval(SkScalar unitU, SkScalar unitV); 29 bool evalPatch(SkPoint verts[], int rows, int cols); 30 31 private: 32 SkBoundary* fBoundary; 33 }; 34 35 //////////////////////////////////////////////////////////////////////// 36 37 class SkLineBoundary : public SkBoundary { 38 public: 39 SkPoint fPts[4]; 40 41 // override 42 virtual SkPoint eval(Edge, SkScalar); 43 }; 44 45 class SkCubicBoundary : public SkBoundary { 46 public: 47 // the caller sets the first 12 entries. The 13th is used by the impl. 48 SkPoint fPts[13]; 49 50 // override 51 virtual SkPoint eval(Edge, SkScalar); 52 }; 53 54 #endif 55 56
