michael@0: 
michael@0: /*
michael@0:  * Copyright 2011 Google Inc.
michael@0:  *
michael@0:  * Use of this source code is governed by a BSD-style license that can be
michael@0:  * found in the LICENSE file.
michael@0:  */
michael@0: #ifndef SkBoundaryPatch_DEFINED
michael@0: #define SkBoundaryPatch_DEFINED
michael@0: 
michael@0: #include "SkPoint.h"
michael@0: #include "SkRefCnt.h"
michael@0: 
michael@0: class SkBoundary : public SkRefCnt {
michael@0: public:
michael@0:     SK_DECLARE_INST_COUNT(SkBoundary)
michael@0: 
michael@0:     // These must be 0, 1, 2, 3 for efficiency in the subclass implementations
michael@0:     enum Edge {
michael@0:         kTop    = 0,
michael@0:         kRight  = 1,
michael@0:         kBottom = 2,
michael@0:         kLeft   = 3
michael@0:     };
michael@0:     // Edge index goes clockwise around the boundary, beginning at the "top"
michael@0:     virtual SkPoint eval(Edge, SkScalar unitInterval) = 0;
michael@0: 
michael@0: private:
michael@0:     typedef SkRefCnt INHERITED;
michael@0: };
michael@0: 
michael@0: class SkBoundaryPatch {
michael@0: public:
michael@0:     SkBoundaryPatch();
michael@0:     ~SkBoundaryPatch();
michael@0: 
michael@0:     SkBoundary* getBoundary() const { return fBoundary; }
michael@0:     SkBoundary* setBoundary(SkBoundary*);
michael@0: 
michael@0:     SkPoint eval(SkScalar unitU, SkScalar unitV);
michael@0:     bool evalPatch(SkPoint verts[], int rows, int cols);
michael@0: 
michael@0: private:
michael@0:     SkBoundary* fBoundary;
michael@0: };
michael@0: 
michael@0: ////////////////////////////////////////////////////////////////////////
michael@0: 
michael@0: class SkLineBoundary : public SkBoundary {
michael@0: public:
michael@0:     SkPoint fPts[4];
michael@0: 
michael@0:     // override
michael@0:     virtual SkPoint eval(Edge, SkScalar);
michael@0: };
michael@0: 
michael@0: class SkCubicBoundary : public SkBoundary {
michael@0: public:
michael@0:     // the caller sets the first 12 entries. The 13th is used by the impl.
michael@0:     SkPoint fPts[13];
michael@0: 
michael@0:     // override
michael@0:     virtual SkPoint eval(Edge, SkScalar);
michael@0: };
michael@0: 
michael@0: #endif