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fix darkroom bilineer interpolation

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This commit is contained in:
bolero-MURAKAMI 2012-08-13 10:56:48 +09:00
parent aec77334ef
commit 744146ae38
6 changed files with 80 additions and 61 deletions
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53
sprout/darkroom/materials/interpolation.hpp Normal file
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#ifndef SPROUT_DARKROOM_MATERIALS_INTERPOLATION_HPP
#define SPROUT_DARKROOM_MATERIALS_INTERPOLATION_HPP
#include <cstdint>
#include <sprout/config.hpp>
#include <sprout/darkroom/colors/rgb.hpp>
namespace sprout {
namespace darkroom {
namespace materials {
//
// interpolation_type
//
struct interpolation_type {
public:
enum values {
nearest_neighbor,
bilinear,
bicubic
};
};
//
// bilinear_interpolate
//
template<typename Color, typename Unit>
inline SPROUT_CONSTEXPR Color bilinear_interpolate(
Color const& c00, Color const& c01, Color const& c10, Color const& c11,
Unit const& u, Unit const& v
)
{
return sprout::darkroom::colors::add(
sprout::darkroom::colors::mul(
sprout::darkroom::colors::add(
sprout::darkroom::colors::mul(c00, u),
sprout::darkroom::colors::mul(c01, 1 - u)
),
v
),
sprout::darkroom::colors::mul(
sprout::darkroom::colors::add(
sprout::darkroom::colors::mul(c10, u),
sprout::darkroom::colors::mul(c11, 1 - u)
),
1 - v
)
);
}
} // namespace materials
} // namespace darkroom
} // namespace sprout
#endif // #ifndef SPROUT_DARKROOM_MATERIALS_INTERPOLATION_HPP