| |
| /* |
| * 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 |