diff options
Diffstat (limited to 'external/include/glm/gtc/color_space.inl')
| -rw-r--r-- | external/include/glm/gtc/color_space.inl | 70 |
1 files changed, 40 insertions, 30 deletions
diff --git a/external/include/glm/gtc/color_space.inl b/external/include/glm/gtc/color_space.inl index c9a44ef..53241ac 100644 --- a/external/include/glm/gtc/color_space.inl +++ b/external/include/glm/gtc/color_space.inl @@ -4,72 +4,82 @@ namespace glm{ namespace detail { - template <typename T, precision P, template <typename, precision> class vecType> + template<length_t L, typename T, qualifier Q> struct compute_rgbToSrgb { - GLM_FUNC_QUALIFIER static vecType<T, P> call(vecType<T, P> const& ColorRGB, T GammaCorrection) + GLM_FUNC_QUALIFIER static vec<L, T, Q> call(vec<L, T, Q> const& ColorRGB, T GammaCorrection) { - vecType<T, P> const ClampedColor(clamp(ColorRGB, static_cast<T>(0), static_cast<T>(1))); + vec<L, T, Q> const ClampedColor(clamp(ColorRGB, static_cast<T>(0), static_cast<T>(1))); return mix( - pow(ClampedColor, vecType<T, P>(GammaCorrection)) * static_cast<T>(1.055) - static_cast<T>(0.055), + pow(ClampedColor, vec<L, T, Q>(GammaCorrection)) * static_cast<T>(1.055) - static_cast<T>(0.055), ClampedColor * static_cast<T>(12.92), - lessThan(ClampedColor, vecType<T, P>(static_cast<T>(0.0031308)))); + lessThan(ClampedColor, vec<L, T, Q>(static_cast<T>(0.0031308)))); } }; - template <typename T, precision P> - struct compute_rgbToSrgb<T, P, tvec4> + template<typename T, qualifier Q> + struct compute_rgbToSrgb<4, T, Q> { - GLM_FUNC_QUALIFIER static tvec4<T, P> call(tvec4<T, P> const& ColorRGB, T GammaCorrection) + GLM_FUNC_QUALIFIER static vec<4, T, Q> call(vec<4, T, Q> const& ColorRGB, T GammaCorrection) { - return tvec4<T, P>(compute_rgbToSrgb<T, P, tvec3>::call(tvec3<T, P>(ColorRGB), GammaCorrection), ColorRGB.w); + return vec<4, T, Q>(compute_rgbToSrgb<3, T, Q>::call(vec<3, T, Q>(ColorRGB), GammaCorrection), ColorRGB.w); } }; - template <typename T, precision P, template <typename, precision> class vecType> + template<length_t L, typename T, qualifier Q> struct compute_srgbToRgb { - GLM_FUNC_QUALIFIER static vecType<T, P> call(vecType<T, P> const& ColorSRGB, T Gamma) + GLM_FUNC_QUALIFIER static vec<L, T, Q> call(vec<L, T, Q> const& ColorSRGB, T Gamma) { return mix( - pow((ColorSRGB + static_cast<T>(0.055)) * static_cast<T>(0.94786729857819905213270142180095), vecType<T, P>(Gamma)), + pow((ColorSRGB + static_cast<T>(0.055)) * static_cast<T>(0.94786729857819905213270142180095), vec<L, T, Q>(Gamma)), ColorSRGB * static_cast<T>(0.07739938080495356037151702786378), - lessThanEqual(ColorSRGB, vecType<T, P>(static_cast<T>(0.04045)))); + lessThanEqual(ColorSRGB, vec<L, T, Q>(static_cast<T>(0.04045)))); } }; - template <typename T, precision P> - struct compute_srgbToRgb<T, P, tvec4> + template<typename T, qualifier Q> + struct compute_srgbToRgb<4, T, Q> { - GLM_FUNC_QUALIFIER static tvec4<T, P> call(tvec4<T, P> const& ColorSRGB, T Gamma) + GLM_FUNC_QUALIFIER static vec<4, T, Q> call(vec<4, T, Q> const& ColorSRGB, T Gamma) { - return tvec4<T, P>(compute_srgbToRgb<T, P, tvec3>::call(tvec3<T, P>(ColorSRGB), Gamma), ColorSRGB.w); + return vec<4, T, Q>(compute_srgbToRgb<3, T, Q>::call(vec<3, T, Q>(ColorSRGB), Gamma), ColorSRGB.w); } }; }//namespace detail - template <typename T, precision P, template <typename, precision> class vecType> - GLM_FUNC_QUALIFIER vecType<T, P> convertLinearToSRGB(vecType<T, P> const& ColorLinear) + template<length_t L, typename T, qualifier Q> + GLM_FUNC_QUALIFIER vec<L, T, Q> convertLinearToSRGB(vec<L, T, Q> const& ColorLinear) { - return detail::compute_rgbToSrgb<T, P, vecType>::call(ColorLinear, static_cast<T>(0.41666)); + return detail::compute_rgbToSrgb<L, T, Q>::call(ColorLinear, static_cast<T>(0.41666)); } - template <typename T, precision P, template <typename, precision> class vecType> - GLM_FUNC_QUALIFIER vecType<T, P> convertLinearToSRGB(vecType<T, P> const& ColorLinear, T Gamma) + // Based on Ian Taylor http://chilliant.blogspot.fr/2012/08/srgb-approximations-for-hlsl.html + template<> + GLM_FUNC_QUALIFIER vec<3, float, lowp> convertLinearToSRGB(vec<3, float, lowp> const& ColorLinear) { - return detail::compute_rgbToSrgb<T, P, vecType>::call(ColorLinear, static_cast<T>(1) / Gamma); + vec<3, float, lowp> S1 = sqrt(ColorLinear); + vec<3, float, lowp> S2 = sqrt(S1); + vec<3, float, lowp> S3 = sqrt(S2); + return 0.662002687f * S1 + 0.684122060f * S2 - 0.323583601f * S3 - 0.0225411470f * ColorLinear; } - template <typename T, precision P, template <typename, precision> class vecType> - GLM_FUNC_QUALIFIER vecType<T, P> convertSRGBToLinear(vecType<T, P> const& ColorSRGB) + template<length_t L, typename T, qualifier Q> + GLM_FUNC_QUALIFIER vec<L, T, Q> convertLinearToSRGB(vec<L, T, Q> const& ColorLinear, T Gamma) { - return detail::compute_srgbToRgb<T, P, vecType>::call(ColorSRGB, static_cast<T>(2.4)); + return detail::compute_rgbToSrgb<L, T, Q>::call(ColorLinear, static_cast<T>(1) / Gamma); } - - template <typename T, precision P, template <typename, precision> class vecType> - GLM_FUNC_QUALIFIER vecType<T, P> convertSRGBToLinear(vecType<T, P> const& ColorSRGB, T Gamma) + + template<length_t L, typename T, qualifier Q> + GLM_FUNC_QUALIFIER vec<L, T, Q> convertSRGBToLinear(vec<L, T, Q> const& ColorSRGB) + { + return detail::compute_srgbToRgb<L, T, Q>::call(ColorSRGB, static_cast<T>(2.4)); + } + + template<length_t L, typename T, qualifier Q> + GLM_FUNC_QUALIFIER vec<L, T, Q> convertSRGBToLinear(vec<L, T, Q> const& ColorSRGB, T Gamma) { - return detail::compute_srgbToRgb<T, P, vecType>::call(ColorSRGB, Gamma); + return detail::compute_srgbToRgb<L, T, Q>::call(ColorSRGB, Gamma); } }//namespace glm |