itom 2.2.1
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00001 /* ******************************************************************** 00002 itom software 00003 URL: http://www.uni-stuttgart.de/ito 00004 Copyright (C) 2016, Institut fuer Technische Optik (ITO), 00005 Universitaet Stuttgart, Germany 00006 00007 This file is part of itom and its software development toolkit (SDK). 00008 00009 itom is free software; you can redistribute it and/or modify it 00010 under the terms of the GNU Library General Public Licence as published by 00011 the Free Software Foundation; either version 2 of the Licence, or (at 00012 your option) any later version. 00013 00014 In addition, as a special exception, the Institut fuer Technische 00015 Optik (ITO) gives you certain additional rights. 00016 These rights are described in the ITO LGPL Exception version 1.0, 00017 which can be found in the file LGPL_EXCEPTION.txt in this package. 00018 00019 itom is distributed in the hope that it will be useful, but 00020 WITHOUT ANY WARRANTY; without even the implied warranty of 00021 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library 00022 General Public Licence for more details. 00023 00024 You should have received a copy of the GNU Library General Public License 00025 along with itom. If not, see <http://www.gnu.org/licenses/>. 00026 *********************************************************************** */ 00027 00028 #ifndef HELPERCOLOR_H 00029 #define HELPERCOLOR_H 00030 00031 #include "typeDefs.h" 00032 00033 00034 namespace ito 00035 { 00036 namespace colorHelper 00037 { 00038 inline float32 grayAlpha(const Rgba32_t &in) 00039 { 00040 return in.gray() * m_value[0]; 00041 } 00042 00043 inline void rgb2yuv(const Rgba32_t &in, float32 &Y, float32 &U, float32 &V) 00044 { 00045 Y = in.gray(); 00046 U = static_cast<float32>(-0.14713 * in.red() - 0.28886 * in.green() + 0.436 * in.blue()); 00047 V = static_cast<float32>(0.615 * in.red() - 0.51499 * in.green() - 0.10001 * in.blue()); 00048 return; 00049 } 00050 00051 inline void rgb2cmyk(const Rgba32_t &in, float32 &C, float32 &M, float32 &Y, float32 &K) 00052 { 00053 K = (255 - (in.red() > in.blue() ? (in.red() > in.green() ? in.red() : in.green()) : (in.blue() > in.green() ? in.blue() : in.green()))) / 255.0; 00054 00055 if( fabs(K - 1) < std::numeric_limits<float32>::epsilon()) 00056 { 00057 C = 0.0; 00058 M = 0.0; 00059 Y = 0.0; 00060 } 00061 else 00062 { 00063 C = (1.0 - in.red()/ 255.0 - K) / (1.0 - K); 00064 M = (1.0 - in.green()/ 255.0 - K) / (1.0 - K); 00065 Y = (1.0 - in.green()/ 255.0 - K) / (1.0 - K); 00066 } 00067 return; 00068 } 00069 00070 00071 template<uint8 _CHANNEL> inline Rgba32_t max(const Rgba32_t &first, const Rgba32_t &second) const 00072 { 00073 if (((RGBChannel_t<_CHANNEL>)first) > ((RGBChannel_t<_CHANNEL>)second) 00074 { 00075 return first; 00076 } 00077 else 00078 { 00079 return second; 00080 } 00081 } 00082 00083 inline Rgba32_t max(const Rgba32_t &first, const Rgba32_t &second, const uint8 &mode) 00084 { 00085 switch(mode) 00086 { 00087 case Rgba32_t::RGBA_B: 00088 case Rgba32_t::RGBA_G: 00089 case Rgba32_t::RGBA_R: 00090 case Rgba32_t::RGBA_A: 00091 return max<mode>(first, second); 00092 break; 00093 case Rgba32_t::RGBA_Y: 00094 if(first.gray() < second.gray()) return second; 00095 else return first; 00096 break; 00097 default: 00098 case Rgba32_t::RGBA_RGB: 00099 { 00100 uint8 max1 = (first.red() > first.blue() ? (first.red() > first.green() ? first.red() : first.green()) : (first.blue() > first.green() ? first.blue() : first.green())); 00101 uint8 max2 = (second.red() > second.blue() ? (second.red() > second.green() ? second.red() : second.green()) : (second.blue() > second.green() ? second.blue() : second.green())); 00102 if(max1 < max2) return second; 00103 else return first; 00104 } 00105 break; 00106 } 00107 } 00108 00109 } // end namespace colorHelper 00110 }; // end namespace ito 00111 00112 #endif