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/*
* Copyright 2008 The Android Open Source Project
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef SkUnitMappers_DEFINED
#define SkUnitMappers_DEFINED
#include "SkUnitMapper.h"
/** This discretizes the range [0...1) into N discret values.
*/
class SkDiscreteMapper : public SkUnitMapper {
public:
SkDiscreteMapper(int segments);
// override from SkUnitMapper
virtual uint16_t mapUnit16(uint16_t x);
protected:
SkDiscreteMapper(SkFlattenableReadBuffer& );
// overrides from SkFlattenable
virtual void flatten(SkFlattenableWriteBuffer& );
virtual Factory getFactory();
private:
int fSegments;
SkFract fScale; // computed from fSegments
static SkFlattenable* Create(SkFlattenableReadBuffer& buffer);
typedef SkUnitMapper INHERITED;
};
/** This returns cos(x), to simulate lighting a sphere, where 0 maps to the
center of the sphere, and 1 maps to the edge.
*/
class SkCosineMapper : public SkUnitMapper {
public:
SkCosineMapper() {}
// override from SkUnitMapper
virtual uint16_t mapUnit16(uint16_t x);
protected:
SkCosineMapper(SkFlattenableReadBuffer&);
// overrides from SkFlattenable
virtual Factory getFactory();
private:
static SkFlattenable* Create(SkFlattenableReadBuffer&);
typedef SkUnitMapper INHERITED;
};
#endif
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