66 lines
1.8 KiB
C
66 lines
1.8 KiB
C
|
/*
|
||
|
|
* Copyright (C) 2008 The Android Open Source Project
|
||
|
|
*
|
||
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
||
|
|
* you may not use this file except in compliance with the License.
|
||
|
|
* You may obtain a copy of the License at
|
||
|
|
*
|
||
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
||
|
|
*
|
||
|
|
* Unless required by applicable law or agreed to in writing, software
|
||
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
||
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||
|
|
* See the License for the specific language governing permissions and
|
||
|
|
* limitations under the License.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#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
|
||
|
|
|