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Diffstat (limited to '3rdparty/include/glm/gtx/color_space.inl')
| -rw-r--r-- | 3rdparty/include/glm/gtx/color_space.inl | 172 |
1 files changed, 172 insertions, 0 deletions
diff --git a/3rdparty/include/glm/gtx/color_space.inl b/3rdparty/include/glm/gtx/color_space.inl new file mode 100644 index 0000000..76333b7 --- /dev/null +++ b/3rdparty/include/glm/gtx/color_space.inl @@ -0,0 +1,172 @@ +///////////////////////////////////////////////////////////////////////////////////////// +/// OpenGL Mathematics (glm.g-truc.net) +/// +/// Copyright (c) 2005 - 2015 G-Truc Creation (www.g-truc.net) +/// Permission is hereby granted, free of charge, to any person obtaining a copy +/// of this software and associated documentation files (the "Software"), to deal +/// in the Software without restriction, including without limitation the rights +/// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +/// copies of the Software, and to permit persons to whom the Software is +/// furnished to do so, subject to the following conditions: +/// +/// The above copyright notice and this permission notice shall be included in +/// all copies or substantial portions of the Software. +/// +/// Restrictions: +/// By making use of the Software for military purposes, you choose to make +/// a Bunny unhappy. +/// +/// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +/// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +/// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +/// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +/// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +/// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN +/// THE SOFTWARE. +/// +/// @ref gtx_color_space +/// @file glm/gtx/color_space.inl +/// @date 2005-12-21 / 2011-06-07 +/// @author Christophe Riccio +/////////////////////////////////////////////////////////////////////////////////////////////////// + +namespace glm +{ + template <typename T, precision P> + GLM_FUNC_QUALIFIER tvec3<T, P> rgbColor(const tvec3<T, P>& hsvColor) + { + tvec3<T, P> hsv = hsvColor; + tvec3<T, P> rgbColor; + + if(hsv.y == static_cast<T>(0)) + // achromatic (grey) + rgbColor = tvec3<T, P>(hsv.z); + else + { + T sector = floor(hsv.x / T(60)); + T frac = (hsv.x / T(60)) - sector; + // factorial part of h + T o = hsv.z * (T(1) - hsv.y); + T p = hsv.z * (T(1) - hsv.y * frac); + T q = hsv.z * (T(1) - hsv.y * (T(1) - frac)); + + switch(int(sector)) + { + default: + case 0: + rgbColor.r = hsv.z; + rgbColor.g = q; + rgbColor.b = o; + break; + case 1: + rgbColor.r = p; + rgbColor.g = hsv.z; + rgbColor.b = o; + break; + case 2: + rgbColor.r = o; + rgbColor.g = hsv.z; + rgbColor.b = q; + break; + case 3: + rgbColor.r = o; + rgbColor.g = p; + rgbColor.b = hsv.z; + break; + case 4: + rgbColor.r = q; + rgbColor.g = o; + rgbColor.b = hsv.z; + break; + case 5: + rgbColor.r = hsv.z; + rgbColor.g = o; + rgbColor.b = p; + break; + } + } + + return rgbColor; + } + + template <typename T, precision P> + GLM_FUNC_QUALIFIER tvec3<T, P> hsvColor(const tvec3<T, P>& rgbColor) + { + tvec3<T, P> hsv = rgbColor; + float Min = min(min(rgbColor.r, rgbColor.g), rgbColor.b); + float Max = max(max(rgbColor.r, rgbColor.g), rgbColor.b); + float Delta = Max - Min; + + hsv.z = Max; + + if(Max != static_cast<T>(0)) + { + hsv.y = Delta / hsv.z; + T h = static_cast<T>(0); + + if(rgbColor.r == Max) + // between yellow & magenta + h = static_cast<T>(0) + T(60) * (rgbColor.g - rgbColor.b) / Delta; + else if(rgbColor.g == Max) + // between cyan & yellow + h = static_cast<T>(120) + T(60) * (rgbColor.b - rgbColor.r) / Delta; + else + // between magenta & cyan + h = static_cast<T>(240) + T(60) * (rgbColor.r - rgbColor.g) / Delta; + + if(h < T(0)) + hsv.x = h + T(360); + else + hsv.x = h; + } + else + { + // If r = g = b = 0 then s = 0, h is undefined + hsv.y = static_cast<T>(0); + hsv.x = static_cast<T>(0); + } + + return hsv; + } + + template <typename T> + GLM_FUNC_QUALIFIER tmat4x4<T, defaultp> saturation(T const s) + { + tvec3<T, defaultp> rgbw = tvec3<T, defaultp>(T(0.2126), T(0.7152), T(0.0722)); + + T col0 = (T(1) - s) * rgbw.r; + T col1 = (T(1) - s) * rgbw.g; + T col2 = (T(1) - s) * rgbw.b; + + tmat4x4<T, defaultp> result(T(1)); + result[0][0] = col0 + s; + result[0][1] = col0; + result[0][2] = col0; + result[1][0] = col1; + result[1][1] = col1 + s; + result[1][2] = col1; + result[2][0] = col2; + result[2][1] = col2; + result[2][2] = col2 + s; + return result; + } + + template <typename T, precision P> + GLM_FUNC_QUALIFIER tvec3<T, P> saturation(const T s, const tvec3<T, P>& color) + { + return tvec3<T, P>(saturation(s) * tvec4<T, P>(color, T(0))); + } + + template <typename T, precision P> + GLM_FUNC_QUALIFIER tvec4<T, P> saturation(const T s, const tvec4<T, P>& color) + { + return saturation(s) * color; + } + + template <typename T, precision P> + GLM_FUNC_QUALIFIER T luminosity(const tvec3<T, P>& color) + { + const tvec3<T, P> tmp = tvec3<T, P>(0.33, 0.59, 0.11); + return dot(color, tmp); + } +}//namespace glm |