117 lines
3.4 KiB
C++
117 lines
3.4 KiB
C++
/* pikabrushcore-kernels.h
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*
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* This file was generated using kernelgen as found in the tools dir.
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* (threshold = 0.25)
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*/
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#ifndef __PIKA_BRUSH_CORE_KERNELS_H__
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#define __PIKA_BRUSH_CORE_KERNELS_H__
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#define KERNEL_WIDTH 3
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#define KERNEL_HEIGHT 3
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#define KERNEL_SUBSAMPLE 4
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#ifdef __cplusplus
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template <class T>
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struct Kernel;
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template <>
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struct Kernel<guchar>
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{
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using value_type = guchar;
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using kernel_type = guint;
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using accum_type = gulong;
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static constexpr kernel_type
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coeff (kernel_type x)
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{
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return x;
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}
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static constexpr value_type
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round (accum_type x)
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{
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return (x + 128) / 256;
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}
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};
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template <>
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struct Kernel<gfloat>
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{
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using value_type = gfloat;
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using kernel_type = gfloat;
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using accum_type = gfloat;
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static constexpr kernel_type
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coeff (kernel_type x)
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{
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return x / 256.0f;
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}
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static constexpr value_type
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round (accum_type x)
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{
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return x;
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}
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};
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/* Brush pixel subsampling kernels */
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template <class T>
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struct Subsample : Kernel<T>
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{
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#define C(x) (Subsample::coeff (x))
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static constexpr typename Subsample::kernel_type kernel[5][5][9] =
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{
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{
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{ C( 64), C( 64), C( 0), C( 64), C( 64), C( 0), C( 0), C( 0), C( 0), },
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{ C( 25), C(103), C( 0), C( 25), C(103), C( 0), C( 0), C( 0), C( 0), },
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{ C( 0), C(128), C( 0), C( 0), C(128), C( 0), C( 0), C( 0), C( 0), },
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{ C( 0), C(103), C( 25), C( 0), C(103), C( 25), C( 0), C( 0), C( 0), },
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{ C( 0), C( 64), C( 64), C( 0), C( 64), C( 64), C( 0), C( 0), C( 0), }
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},
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{
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{ C( 25), C( 25), C( 0), C(103), C(103), C( 0), C( 0), C( 0), C( 0), },
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{ C( 6), C( 44), C( 0), C( 44), C(162), C( 0), C( 0), C( 0), C( 0), },
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{ C( 0), C( 50), C( 0), C( 0), C(206), C( 0), C( 0), C( 0), C( 0), },
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{ C( 0), C( 44), C( 6), C( 0), C(162), C( 44), C( 0), C( 0), C( 0), },
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{ C( 0), C( 25), C( 25), C( 0), C(103), C(103), C( 0), C( 0), C( 0), }
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},
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{
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{ C( 0), C( 0), C( 0), C(128), C(128), C( 0), C( 0), C( 0), C( 0), },
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{ C( 0), C( 0), C( 0), C( 50), C(206), C( 0), C( 0), C( 0), C( 0), },
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{ C( 0), C( 0), C( 0), C( 0), C(256), C( 0), C( 0), C( 0), C( 0), },
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{ C( 0), C( 0), C( 0), C( 0), C(206), C( 50), C( 0), C( 0), C( 0), },
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{ C( 0), C( 0), C( 0), C( 0), C(128), C(128), C( 0), C( 0), C( 0), }
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},
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{
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{ C( 0), C( 0), C( 0), C(103), C(103), C( 0), C( 25), C( 25), C( 0), },
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{ C( 0), C( 0), C( 0), C( 44), C(162), C( 0), C( 6), C( 44), C( 0), },
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{ C( 0), C( 0), C( 0), C( 0), C(206), C( 0), C( 0), C( 50), C( 0), },
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{ C( 0), C( 0), C( 0), C( 0), C(162), C( 44), C( 0), C( 44), C( 6), },
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{ C( 0), C( 0), C( 0), C( 0), C(103), C(103), C( 0), C( 25), C( 25), }
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},
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{
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{ C( 0), C( 0), C( 0), C( 64), C( 64), C( 0), C( 64), C( 64), C( 0), },
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{ C( 0), C( 0), C( 0), C( 25), C(103), C( 0), C( 25), C(103), C( 0), },
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{ C( 0), C( 0), C( 0), C( 0), C(128), C( 0), C( 0), C(128), C( 0), },
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{ C( 0), C( 0), C( 0), C( 0), C(103), C( 25), C( 0), C(103), C( 25), },
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{ C( 0), C( 0), C( 0), C( 0), C( 64), C( 64), C( 0), C( 64), C( 64), }
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}
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};
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#undef C
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};
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template <class T>
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constexpr typename Subsample<T>::kernel_type Subsample<T>::kernel[5][5][9];
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#endif /* __cplusplus */
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#endif /* __PIKA_BRUSH_CORE_KERNELS_H__ */
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