1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000 1.2 +++ b/PTdecode/CImg-1.3.0/examples/use_RGBclass.cpp Mon Aug 03 14:09:20 2009 +0100 1.3 @@ -0,0 +1,142 @@ 1.4 +/* 1.5 + # 1.6 + # File : use_RGBclass.cpp 1.7 + # ( C++ source file ) 1.8 + # 1.9 + # Description : A small code that shows how to write a CImg plugin to 1.10 + # handle color image manipulation using a user-defined RGB 1.11 + # class, instead of using classical pixel access of CImg<T> 1.12 + # with operator(). 1.13 + # This file is a part of the CImg Library project. 1.14 + # ( http://cimg.sourceforge.net ) 1.15 + # 1.16 + # Note : This file cannot be compiled on VC++ 6. 1.17 + # 1.18 + # Copyright : David Tschumperle 1.19 + # ( http://www.greyc.ensicaen.fr/~dtschump/ ) 1.20 + # 1.21 + # License : CeCILL v2.0 1.22 + # ( http://www.cecill.info/licences/Licence_CeCILL_V2-en.html ) 1.23 + # 1.24 + # This software is governed by the CeCILL license under French law and 1.25 + # abiding by the rules of distribution of free software. You can use, 1.26 + # modify and/ or redistribute the software under the terms of the CeCILL 1.27 + # license as circulated by CEA, CNRS and INRIA at the following URL 1.28 + # "http://www.cecill.info". 1.29 + # 1.30 + # As a counterpart to the access to the source code and rights to copy, 1.31 + # modify and redistribute granted by the license, users are provided only 1.32 + # with a limited warranty and the software's author, the holder of the 1.33 + # economic rights, and the successive licensors have only limited 1.34 + # liability. 1.35 + # 1.36 + # In this respect, the user's attention is drawn to the risks associated 1.37 + # with loading, using, modifying and/or developing or reproducing the 1.38 + # software by the user in light of its specific status of free software, 1.39 + # that may mean that it is complicated to manipulate, and that also 1.40 + # therefore means that it is reserved for developers and experienced 1.41 + # professionals having in-depth computer knowledge. Users are therefore 1.42 + # encouraged to load and test the software's suitability as regards their 1.43 + # requirements in conditions enabling the security of their systems and/or 1.44 + # data to be ensured and, more generally, to use and operate it in the 1.45 + # same conditions as regards security. 1.46 + # 1.47 + # The fact that you are presently reading this means that you have had 1.48 + # knowledge of the CeCILL license and that you accept its terms. 1.49 + # 1.50 +*/ 1.51 + 1.52 +#ifndef cimg_plugin 1.53 +#define cimg_plugin "examples/use_RGBclass.cpp" // Path of the plugin is relative to the CImg.h file. 1.54 +#include "CImg.h" 1.55 +using namespace cimg_library; 1.56 + 1.57 +#ifndef cimg_imagepath 1.58 +#define cimg_imagepath "img/" 1.59 +#endif 1.60 + 1.61 +//---------------- 1.62 +// Main procedure 1.63 +//---------------- 1.64 +int main() { 1.65 + 1.66 + // Load images. 1.67 + CImg<short> img1(cimg_imagepath "milla.bmp"); 1.68 + const CImg<float> img2 = CImg<float>(cimg_imagepath "lena.pgm").resize(img1,3); 1.69 + const float default_color[] = { 30,30,80 }; 1.70 + 1.71 + // Modify 'img1' using the RGB pixel accessor. 1.72 + cimg_forXY(img1,x,y) 1.73 + if (!((x*y)%31)) img1.RGB_at(x,y) = default_color; 1.74 + else if ((x+y)%2) img1.RGB_at(x,y) = img2.RGB_at(x,y); 1.75 + img1.display(); 1.76 + 1.77 + // Quit. 1.78 + return 0; 1.79 +} 1.80 + 1.81 +#else 1.82 + 1.83 +//------------------------- 1.84 +// Start of the plugin code 1.85 +//------------------------- 1.86 + 1.87 +// Define a simple structure of *references* to R,G,B values. 1.88 +//----------------------------------------------------------- 1.89 +// (Feel free to add your own operators in there !) 1.90 +struct st_RGB { 1.91 + T _R,_G,_B,&R,&G,&B; 1.92 + 1.93 + // Construct from R,G,B references of values. 1.94 + st_RGB(const T& nR, const T& nG, const T& nB):_R(nR),_G(nG),_B(nB),R(_R),G(_G),B(_B) {} 1.95 + st_RGB(T& nR, T& nG, T& nB):R(nR),G(nG),B(nB) {} 1.96 + 1.97 + // Copy constructors. 1.98 + st_RGB(const st_RGB& rgb):_R(rgb.R),_G(rgb.G),_B(rgb.B),R(_R),G(_G),B(_B) {} 1.99 + template<typename t> 1.100 + st_RGB(const t& rgb):_R(rgb[0]),_G(rgb[1]),_B(rgb[2]) {} 1.101 + 1.102 + // Assignement operator. 1.103 + st_RGB& operator=(const st_RGB& rgb) { 1.104 + R = (T)(rgb[0]); G = (T)(rgb[1]); B = (T)(rgb[2]); 1.105 + return *this; 1.106 + } 1.107 + template<typename t> 1.108 + st_RGB& operator=(const t& rgb) { 1.109 + R = (T)(rgb[0]); G = (T)(rgb[1]); B = (T)(rgb[2]); 1.110 + return *this; 1.111 + } 1.112 + 1.113 + // Data (R,G or B) access operator. 1.114 + const T& operator[](const unsigned int i) const { 1.115 + return i==2?B:(i==1?G:R); 1.116 + } 1.117 + T& operator[](const unsigned int i) { 1.118 + return i==2?B:(i==1?G:R); 1.119 + } 1.120 + 1.121 + // Print instance on the standard error. 1.122 + const st_RGB& print() const { 1.123 + std::fprintf(stderr,"{ %d %d %d }\n",(int)R,(int)G,(int)B); 1.124 + return *this; 1.125 + } 1.126 +}; 1.127 + 1.128 +// Define CImg<T> member functions which return pixel values as st_RGB instances. 1.129 +//-------------------------------------------------------------------------------- 1.130 +const st_RGB RGB_at(const int x, const int y=0, const int z=0) const { 1.131 + const long whz = width*height*depth; 1.132 + const T *const pR = data + x + y*width + z*width*height, *const pG = pR + whz, *const pB = pG + whz; 1.133 + return st_RGB(*pR,*pG,*pB); 1.134 +} 1.135 + 1.136 +st_RGB RGB_at(const int x, const int y=0, const int z=0) { 1.137 + const long whz = width*height*depth; 1.138 + T *const pR = data + x + y*width + z*width*height, *const pG = pR + whz, *const pB = pG + whz; 1.139 + return st_RGB(*pR,*pG,*pB); 1.140 +} 1.141 + 1.142 +//------------------------ 1.143 +// End of the plugin code 1.144 +//------------------------ 1.145 +#endif