mirror of https://github.com/axmolengine/axmol.git
66 lines
1.8 KiB
C
66 lines
1.8 KiB
C
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/*
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* Copyright (C) 2008 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 SkUnitMappers_DEFINED
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#define SkUnitMappers_DEFINED
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#include "SkUnitMapper.h"
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/** This discretizes the range [0...1) into N discret values.
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*/
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class SkDiscreteMapper : public SkUnitMapper {
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public:
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SkDiscreteMapper(int segments);
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// override from SkUnitMapper
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virtual uint16_t mapUnit16(uint16_t x);
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protected:
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SkDiscreteMapper(SkFlattenableReadBuffer& );
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// overrides from SkFlattenable
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virtual void flatten(SkFlattenableWriteBuffer& );
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virtual Factory getFactory();
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private:
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int fSegments;
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SkFract fScale; // computed from fSegments
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static SkFlattenable* Create(SkFlattenableReadBuffer& buffer);
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typedef SkUnitMapper INHERITED;
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};
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/** This returns cos(x), to simulate lighting a sphere, where 0 maps to the
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center of the sphere, and 1 maps to the edge.
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*/
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class SkCosineMapper : public SkUnitMapper {
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public:
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SkCosineMapper() {}
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// override from SkUnitMapper
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virtual uint16_t mapUnit16(uint16_t x);
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protected:
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SkCosineMapper(SkFlattenableReadBuffer&);
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// overrides from SkFlattenable
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virtual Factory getFactory();
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private:
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static SkFlattenable* Create(SkFlattenableReadBuffer&);
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typedef SkUnitMapper INHERITED;
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};
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#endif
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