105 lines
4.3 KiB
C++
105 lines
4.3 KiB
C++
/////////////////////////////////////////////////////////////////////////////////////////
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/// OpenGL Mathematics (glm.g-truc.net)
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///
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/// Copyright (c) 2005 - 2015 G-Truc Creation (www.g-truc.net)
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/// Permission is hereby granted, free of charge, to any person obtaining a copy
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/// of this software and associated documentation files (the "Software"), to deal
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/// in the Software without restriction, including without limitation the rights
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/// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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/// copies of the Software, and to permit persons to whom the Software is
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/// furnished to do so, subject to the following conditions:
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///
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/// The above copyright notice and this permission notice shall be included in
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/// all copies or substantial portions of the Software.
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///
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/// Restrictions:
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/// By making use of the Software for military purposes, you choose to make
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/// a Bunny unhappy.
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///
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/// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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/// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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/// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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/// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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/// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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/// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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/// THE SOFTWARE.
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///
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/// @ref gtc_color_space
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/// @file glm/gtc/color_space.inl
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/// @date 2015-02-10 / 2015-08-02
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/// @author Christophe Riccio
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///////////////////////////////////////////////////////////////////////////////////////////////////
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namespace glm{
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namespace detail
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{
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template <typename T, precision P, template <typename, precision> class vecType>
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struct compute_rgbToSrgb
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{
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GLM_FUNC_QUALIFIER static vecType<T, P> call(vecType<T, P> const & ColorRGB, T GammaCorrection)
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{
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vecType<T, P> const ClampedColor(clamp(ColorRGB, static_cast<T>(0), static_cast<T>(1)));
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return mix(
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pow(ClampedColor, vecType<T, P>(GammaCorrection)) * static_cast<T>(1.055) - static_cast<T>(0.055),
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ClampedColor * static_cast<T>(12.92),
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lessThan(ClampedColor, vecType<T, P>(static_cast<T>(0.0031308))));
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}
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};
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template <typename T, precision P>
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struct compute_rgbToSrgb<T, P, tvec4>
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{
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GLM_FUNC_QUALIFIER static tvec4<T, P> call(tvec4<T, P> const & ColorRGB, T GammaCorrection)
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{
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return tvec4<T, P>(compute_rgbToSrgb<T, P, tvec3>::call(tvec3<T, P>(ColorRGB), GammaCorrection), ColorRGB.a);
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}
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};
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template <typename T, precision P, template <typename, precision> class vecType>
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struct compute_srgbToRgb
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{
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GLM_FUNC_QUALIFIER static vecType<T, P> call(vecType<T, P> const & ColorSRGB, T Gamma)
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{
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return mix(
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pow((ColorSRGB + static_cast<T>(0.055)) * static_cast<T>(0.94786729857819905213270142180095), vecType<T, P>(Gamma)),
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ColorSRGB * static_cast<T>(0.07739938080495356037151702786378),
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lessThanEqual(ColorSRGB, vecType<T, P>(static_cast<T>(0.04045))));
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}
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};
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template <typename T, precision P>
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struct compute_srgbToRgb<T, P, tvec4>
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{
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GLM_FUNC_QUALIFIER static tvec4<T, P> call(tvec4<T, P> const & ColorSRGB, T Gamma)
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{
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return tvec4<T, P>(compute_srgbToRgb<T, P, tvec3>::call(tvec3<T, P>(ColorSRGB), Gamma), ColorSRGB.a);
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}
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};
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}//namespace detail
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template <typename T, precision P, template <typename, precision> class vecType>
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GLM_FUNC_QUALIFIER vecType<T, P> convertLinearToSRGB(vecType<T, P> const & ColorLinear)
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{
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return detail::compute_rgbToSrgb<T, P, vecType>::call(ColorLinear, static_cast<T>(0.41666));
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}
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template <typename T, precision P, template <typename, precision> class vecType>
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GLM_FUNC_QUALIFIER vecType<T, P> convertLinearToSRGB(vecType<T, P> const & ColorLinear, T Gamma)
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{
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return detail::compute_rgbToSrgb<T, P, vecType>::call(ColorLinear, static_cast<T>(1) / Gamma);
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}
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template <typename T, precision P, template <typename, precision> class vecType>
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GLM_FUNC_QUALIFIER vecType<T, P> convertSRGBToLinear(vecType<T, P> const & ColorSRGB)
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{
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return detail::compute_srgbToRgb<T, P, vecType>::call(ColorSRGB, static_cast<T>(2.4));
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}
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template <typename T, precision P, template <typename, precision> class vecType>
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GLM_FUNC_QUALIFIER vecType<T, P> convertSRGBToLinear(vecType<T, P> const & ColorSRGB, T Gamma)
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{
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return detail::compute_srgbToRgb<T, P, vecType>::call(ColorSRGB, Gamma);
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}
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}//namespace glm
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