e16efc1882
git-svn-id: http://skia.googlecode.com/svn/trunk@7406 2bbb7eff-a529-9590-31e7-b0007b416f81
67 lines
1.4 KiB
C++
67 lines
1.4 KiB
C++
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/*
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* Copyright 2011 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#ifndef SkBoundaryPatch_DEFINED
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#define SkBoundaryPatch_DEFINED
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#include "SkPoint.h"
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#include "SkRefCnt.h"
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class SkBoundary : public SkRefCnt {
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public:
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SK_DECLARE_INST_COUNT(SkBoundary)
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// These must be 0, 1, 2, 3 for efficiency in the subclass implementations
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enum Edge {
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kTop = 0,
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kRight = 1,
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kBottom = 2,
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kLeft = 3
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};
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// Edge index goes clockwise around the boundary, beginning at the "top"
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virtual SkPoint eval(Edge, SkScalar unitInterval) = 0;
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private:
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typedef SkRefCnt INHERITED;
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};
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class SkBoundaryPatch {
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public:
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SkBoundaryPatch();
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~SkBoundaryPatch();
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SkBoundary* getBoundary() const { return fBoundary; }
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SkBoundary* setBoundary(SkBoundary*);
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SkPoint eval(SkScalar unitU, SkScalar unitV);
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bool evalPatch(SkPoint verts[], int rows, int cols);
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private:
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SkBoundary* fBoundary;
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};
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////////////////////////////////////////////////////////////////////////
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class SkLineBoundary : public SkBoundary {
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public:
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SkPoint fPts[4];
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// override
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virtual SkPoint eval(Edge, SkScalar);
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};
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class SkCubicBoundary : public SkBoundary {
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public:
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// the caller sets the first 12 entries. The 13th is used by the impl.
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SkPoint fPts[13];
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// override
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virtual SkPoint eval(Edge, SkScalar);
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};
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#endif
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