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#ifndef SkBoundaryPatch_DEFINED
#define SkBoundaryPatch_DEFINED
#include "SkPoint.h"
#include "SkRefCnt.h"
class SkBoundary : public SkRefCnt {
public:
// These must be 0, 1, 2, 3 for efficiency in the subclass implementations
enum Edge {
kTop = 0,
kRight = 1,
kBottom = 2,
kLeft = 3
};
// Edge index goes clockwise around the boundary, beginning at the "top"
virtual SkPoint eval(Edge, SkScalar unitInterval) = 0;
};
class SkBoundaryPatch {
public:
SkBoundaryPatch();
~SkBoundaryPatch();
SkBoundary* getBoundary() const { return fBoundary; }
SkBoundary* setBoundary(SkBoundary*);
SkPoint eval(SkScalar unitU, SkScalar unitV);
bool evalPatch(SkPoint verts[], int rows, int cols);
private:
SkBoundary* fBoundary;
};
////////////////////////////////////////////////////////////////////////
class SkLineBoundary : public SkBoundary {
public:
SkPoint fPts[4];
// override
virtual SkPoint eval(Edge, SkScalar);
};
class SkCubicBoundary : public SkBoundary {
public:
// the caller sets the first 12 entries. The 13th is used by the impl.
SkPoint fPts[13];
// override
virtual SkPoint eval(Edge, SkScalar);
};
#endif
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