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authorNikolas <nikolas@boutalas.com>2024-10-27 12:52:55 +0200
committerNikolas <nikolas@boutalas.com>2024-10-27 12:52:55 +0200
commit43394c8a8908442982e3a7e25975c31b3c952923 (patch)
tree2facd563e29f48fe3b0653ac5c113998940b4d5e /3rdparty/include/glm/gtx/color_space.inl
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+/////////////////////////////////////////////////////////////////////////////////////////
+/// 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