1915fd09f3
BUG= R=caryclark@google.com Review URL: https://codereview.chromium.org/113873008 git-svn-id: http://skia.googlecode.com/svn/trunk@12767 2bbb7eff-a529-9590-31e7-b0007b416f81
56 lines
1.3 KiB
C++
56 lines
1.3 KiB
C++
|
|
/*
|
|
* 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);
|
|
|
|
SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkDiscreteMapper)
|
|
|
|
protected:
|
|
SkDiscreteMapper(SkFlattenableReadBuffer& );
|
|
virtual void flatten(SkFlattenableWriteBuffer&) const SK_OVERRIDE;
|
|
|
|
private:
|
|
int fSegments;
|
|
int32_t fScale; // computed from fSegments
|
|
|
|
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);
|
|
|
|
SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkCosineMapper)
|
|
|
|
protected:
|
|
SkCosineMapper(SkFlattenableReadBuffer&);
|
|
|
|
private:
|
|
|
|
typedef SkUnitMapper INHERITED;
|
|
};
|
|
|
|
#endif
|