mirror of https://github.com/axmolengine/axmol.git
72 lines
1.8 KiB
C
72 lines
1.8 KiB
C
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/*
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* Copyright (C) 2009 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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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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// 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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};
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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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