1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/gfx/skia/trunk/include/utils/SkUnitMappers.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,55 @@
1.4 +
1.5 +/*
1.6 + * Copyright 2008 The Android Open Source Project
1.7 + *
1.8 + * Use of this source code is governed by a BSD-style license that can be
1.9 + * found in the LICENSE file.
1.10 + */
1.11 +
1.12 +
1.13 +#ifndef SkUnitMappers_DEFINED
1.14 +#define SkUnitMappers_DEFINED
1.15 +
1.16 +#include "SkUnitMapper.h"
1.17 +
1.18 +/** This discretizes the range [0...1) into N discret values.
1.19 +*/
1.20 +class SkDiscreteMapper : public SkUnitMapper {
1.21 +public:
1.22 + SkDiscreteMapper(int segments);
1.23 + // override from SkUnitMapper
1.24 + virtual uint16_t mapUnit16(uint16_t x);
1.25 +
1.26 + SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkDiscreteMapper)
1.27 +
1.28 +protected:
1.29 + SkDiscreteMapper(SkReadBuffer& );
1.30 + virtual void flatten(SkWriteBuffer&) const SK_OVERRIDE;
1.31 +
1.32 +private:
1.33 + int fSegments;
1.34 + int32_t fScale; // computed from fSegments
1.35 +
1.36 + typedef SkUnitMapper INHERITED;
1.37 +};
1.38 +
1.39 +/** This returns cos(x), to simulate lighting a sphere, where 0 maps to the
1.40 + center of the sphere, and 1 maps to the edge.
1.41 +*/
1.42 +class SkCosineMapper : public SkUnitMapper {
1.43 +public:
1.44 + SkCosineMapper() {}
1.45 + // override from SkUnitMapper
1.46 + virtual uint16_t mapUnit16(uint16_t x);
1.47 +
1.48 + SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkCosineMapper)
1.49 +
1.50 +protected:
1.51 + SkCosineMapper(SkReadBuffer&);
1.52 +
1.53 +private:
1.54 +
1.55 + typedef SkUnitMapper INHERITED;
1.56 +};
1.57 +
1.58 +#endif
