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61 lines
1.7 KiB
C++
61 lines
1.7 KiB
C++
/*=============================================================================
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Copyright (c) 2011-2019 Bolero MURAKAMI
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https://github.com/bolero-MURAKAMI/Sprout
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Distributed under the Boost Software License, Version 1.0. (See accompanying
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file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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=============================================================================*/
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#ifndef SPROUT_DARKROOM_MATERIALS_INTERPOLATION_HPP
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#define SPROUT_DARKROOM_MATERIALS_INTERPOLATION_HPP
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#include <cstdint>
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#include <sprout/config.hpp>
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#include <sprout/darkroom/colors/rgb.hpp>
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namespace sprout {
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namespace darkroom {
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namespace materials {
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//
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// interpolation_type
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//
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struct interpolation_type {
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public:
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enum values {
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nearest_neighbor,
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bilinear,
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bicubic
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};
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};
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//
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// bilinear_interpolate
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//
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template<typename Color, typename Unit>
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inline SPROUT_CONSTEXPR Color
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bilinear_interpolate(
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Color const& c00, Color const& c01, Color const& c10, Color const& c11,
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Unit const& u, Unit const& v
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)
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{
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return sprout::darkroom::colors::add(
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sprout::darkroom::colors::mul(
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sprout::darkroom::colors::add(
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sprout::darkroom::colors::mul(c00, 1 - u),
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sprout::darkroom::colors::mul(c01, u)
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),
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1 - v
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),
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sprout::darkroom::colors::mul(
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sprout::darkroom::colors::add(
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sprout::darkroom::colors::mul(c10, 1 - u),
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sprout::darkroom::colors::mul(c11, u)
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),
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v
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)
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);
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}
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} // namespace materials
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} // namespace darkroom
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} // namespace sprout
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#endif // #ifndef SPROUT_DARKROOM_MATERIALS_INTERPOLATION_HPP
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