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Diffstat (limited to 'include/utils/SkBoundaryPatch.h')
-rw-r--r-- | include/utils/SkBoundaryPatch.h | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/include/utils/SkBoundaryPatch.h b/include/utils/SkBoundaryPatch.h new file mode 100644 index 0000000000..f8edd594b9 --- /dev/null +++ b/include/utils/SkBoundaryPatch.h @@ -0,0 +1,66 @@ + +/* + * Copyright 2011 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ +#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; + +private: + typedef SkRefCnt INHERITED; +}; + +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 |