Squashed 'third_party/cimg/' content from commit 4b66369
Change-Id: I7454d9107a08dba899fd4659731733049165ae0a
git-subtree-dir: third_party/cimg
git-subtree-split: 4b66369ab4e34a46119d6c43e9adce061bb40f4b
diff --git a/examples/fade_images.cpp b/examples/fade_images.cpp
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+/*
+ #
+ # File : fade_images.cpp
+ # ( C++ source file )
+ #
+ # Description : Compute a linear fading between two images.
+ # This file is a part of the CImg Library project.
+ # ( http://cimg.eu )
+ #
+ # Copyright : David Tschumperle
+ # ( http://tschumperle.users.greyc.fr/ )
+ #
+ # License : CeCILL v2.0
+ # ( http://www.cecill.info/licences/Licence_CeCILL_V2-en.html )
+ #
+ # This software is governed by the CeCILL license under French law and
+ # abiding by the rules of distribution of free software. You can use,
+ # modify and/ or redistribute the software under the terms of the CeCILL
+ # license as circulated by CEA, CNRS and INRIA at the following URL
+ # "http://www.cecill.info".
+ #
+ # As a counterpart to the access to the source code and rights to copy,
+ # modify and redistribute granted by the license, users are provided only
+ # with a limited warranty and the software's author, the holder of the
+ # economic rights, and the successive licensors have only limited
+ # liability.
+ #
+ # In this respect, the user's attention is drawn to the risks associated
+ # with loading, using, modifying and/or developing or reproducing the
+ # software by the user in light of its specific status of free software,
+ # that may mean that it is complicated to manipulate, and that also
+ # therefore means that it is reserved for developers and experienced
+ # professionals having in-depth computer knowledge. Users are therefore
+ # encouraged to load and test the software's suitability as regards their
+ # requirements in conditions enabling the security of their systems and/or
+ # data to be ensured and, more generally, to use and operate it in the
+ # same conditions as regards security.
+ #
+ # The fact that you are presently reading this means that you have had
+ # knowledge of the CeCILL license and that you accept its terms.
+ #
+*/
+
+#include "CImg.h"
+#ifndef cimg_imagepath
+#define cimg_imagepath "img/"
+#endif
+#undef min
+#undef max
+
+// Main procedure
+//---------------
+int main(int argc,char **argv) {
+
+ // Read and check command line parameters.
+ cimg_usage("Compute a linear fading between two 2D images");
+ const char *file_i1 = cimg_option("-i1",cimg_imagepath "sh0r.pgm","Input Image 1");
+ const char *file_i2 = cimg_option("-i2",cimg_imagepath "milla.bmp","Input Image 2");
+ const char *file_o = cimg_option("-o",(char*)0,"Output Image");
+ const bool visu = cimg_option("-visu",true,"Visualization mode");
+ const double pmin = cimg_option("-min",40.0,"Begin of the fade (in %)")/100.0;
+ const double pmax = cimg_option("-max",60.0,"End of the fade (in %)")/100.0;
+ const double angle = cimg_option("-angle",0.0,"Fade angle")*cil::cimg::PI/180;
+
+ // Init images.
+ cil::CImg<unsigned char> img1(file_i1), img2(file_i2);
+ if (!img2.is_sameXYZC(img1)) {
+ int
+ dx = std::max(img1.width(),img2.width()),
+ dy = std::max(img1.height(),img2.height()),
+ dz = std::max(img1.depth(),img2.depth()),
+ dv = std::max(img1.spectrum(),img2.spectrum());
+ img1.resize(dx,dy,dz,dv,3);
+ img2.resize(dx,dy,dz,dv,3);
+ }
+ cil::CImg<unsigned char> dest(img1);
+
+ // Compute the faded image.
+ const double ca = std::cos(angle), sa = std::sin(angle);
+ double alpha;
+ cimg_forXYZC(dest,x,y,z,k) {
+ const double X = ((double)x/img1.width() - 0.5)*ca + ((double)y/img1.height() - 0.5)*sa;
+ if (X + 0.5<pmin) alpha = 0; else {
+ if (X + 0.5>pmax) alpha = 1; else
+ alpha = (X + 0.5 - pmin)/(pmax - pmin);
+ }
+ dest(x,y,z,k) = (unsigned char)((1 - alpha)*img1(x,y,z,k) + alpha*img2(x,y,z,k));
+ }
+
+ // Save and exit
+ if (file_o) dest.save(file_o);
+ if (visu) dest.display("Image fading");
+ return 0;
+}