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git-subtree-split: 4b66369ab4e34a46119d6c43e9adce061bb40f4b
diff --git a/examples/captcha.cpp b/examples/captcha.cpp
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+/*
+ #
+ # File : captcha.cpp
+ # ( C++ source file )
+ #
+ # Description : Captcha images generator.
+ # 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.
+ #
+*/
+
+#ifndef cimg_debug
+#define cimg_debug 1
+#endif
+#include "CImg.h"
+using namespace cimg_library;
+#undef min
+#undef max
+
+// Main procedure
+//----------------
+int main(int argc,char **argv) {
+
+ // Read command line parameters
+ //------------------------------
+ cimg_usage("Simple captcha generator.");
+ const char *file_o = cimg_option("-o",(const char*)0,"Output image file");
+ const bool add_border = cimg_option("-b",true,"Add border to captcha image");
+ const bool visu = cimg_option("-visu",true,"Enable visualization if no output file");
+
+ // Generate captcha text (6 char max).
+ //------------------------------------
+ const char *predef_words[] = {
+ "aarrgh", "abacas", "abacus", "abakas", "abamps", "abased", "abaser", "abases", "abasia", "abated", "abater",
+ "abates", "abatis", "abator", "baobab", "barbal", "barbed", "barbel", "barber", "barbes", "barbet", "barbie",
+ "barbut", "barcas", "barded", "bardes", "bardic", "barege", "cavies", "cavils", "caving", "cavity", "cavort",
+ "cawing", "cayman", "cayuse", "ceased", "ceases", "cebids", "ceboid", "cecity", "cedarn", "dicast", "dicers",
+ "dicier", "dicing", "dicker", "dickey", "dickie", "dicots", "dictum", "didact", "diddle", "diddly", "didies",
+ "didoes", "emails", "embalm", "embank", "embark", "embars", "embays", "embeds", "embers", "emblem", "embody",
+ "emboli", "emboly", "embosk", "emboss", "fluffy", "fluids", "fluish", "fluked", "flukes", "flukey", "flumed",
+ "flumes", "flumps", "flunks", "flunky", "fluors", "flurry", "fluted", "genome", "genoms", "genres", "genros",
+ "gentes", "gentil", "gentle", "gently", "gentry", "geodes", "geodic", "geoids", "gerahs", "gerbil", "hotter",
+ "hottie", "houdah", "hounds", "houris", "hourly", "housed", "housel", "houser", "houses", "hovels", "hovers",
+ "howdah", "howdie", "inland", "inlays", "inlets", "inlier", "inmate", "inmesh", "inmost", "innage", "innate",
+ "inners", "inning", "inpour", "inputs", "inroad", "joypop", "jubbah", "jubhah", "jubile", "judder", "judged",
+ "judger", "judges", "judoka", "jugate", "jugful", "jugged", "juggle", "jugula", "knifer", "knifes", "knight",
+ "knives", "knobby", "knocks", "knolls", "knolly", "knosps", "knotty", "knouts", "knower", "knowns", "knubby",
+ "legate", "legato", "legend", "legers", "legged", "leggin", "legion", "legist", "legits", "legman", "legmen",
+ "legong", "legume", "lehuas", "mammal", "mammas", "mammee", "mammer", "mammet", "mammey", "mammie", "mammon",
+ "mamzer", "manage", "manana", "manats", "manche", "manege", "nihils", "nilgai", "nilgau", "nilled", "nimble",
+ "nimbly", "nimbus", "nimmed", "nimrod", "ninety", "ninjas", "ninons", "ninths", "niobic", "offish", "offkey",
+ "offset", "oftest", "ogdoad", "oghams", "ogival", "ogives", "oglers", "ogling", "ogress", "ogrish", "ogrism",
+ "ohmage", "papaws", "papaya", "papers", "papery", "pappus", "papula", "papule", "papyri", "parade", "paramo",
+ "parang", "paraph", "parcel", "pardah", "quasar", "quatre", "quaver", "qubits", "qubyte", "queans", "queasy",
+ "queazy", "queens", "queers", "quelea", "quells", "quench", "querns", "raised", "raiser", "raises", "raisin",
+ "raitas", "rajahs", "rakees", "rakers", "raking", "rakish", "rallye", "ralphs", "ramada", "ramate", "savory",
+ "savour", "savoys", "sawers", "sawfly", "sawing", "sawlog", "sawney", "sawyer", "saxony", "sayeds", "sayers",
+ "sayest", "sayids", "tondos", "toneme", "toners", "tongas", "tonged", "tonger", "tongue", "tonics", "tonier",
+ "toning", "tonish", "tonlet", "tonner", "tonnes", "uredia", "uredos", "ureide", "uremia", "uremic", "ureter",
+ "uretic", "urgent", "urgers", "urging", "urials", "urinal", "urines", "uropod", "villus", "vimina", "vinals",
+ "vincas", "vineal", "vinery", "vinier", "vinify", "vining", "vinous", "vinyls", "violas", "violet", "violin",
+ "webfed", "weblog", "wechts", "wedded", "wedder", "wedeln", "wedels", "wedged", "wedges", "wedgie", "weeded",
+ "weeder", "weekly", "weened", "xystoi", "xystos", "xystus", "yabber", "yabbie", "yachts", "yacked", "yaffed",
+ "yagers", "yahoos", "yairds", "yakked", "yakker", "yakuza", "zigged", "zigzag", "zillah", "zinced", "zincic",
+ "zincky", "zinebs", "zinged", "zinger", "zinnia", "zipped", "zipper", "zirams", "zircon" };
+ cimg::srand();
+ const char *const captcha_text = predef_words[std::rand()%(sizeof(predef_words)/sizeof(char*))];
+
+ // Create captcha image
+ //----------------------
+
+ // Write colored and distorted text
+ CImg<unsigned char> captcha(256,64,1,3,0), color(3);
+ char letter[2] = { 0 };
+ for (unsigned int k = 0; k<6; ++k) {
+ CImg<unsigned char> tmp;
+ *letter = captcha_text[k];
+ if (*letter) {
+ cimg_forX(color,i) color[i] = (unsigned char)(128 + (std::rand()%127));
+ tmp.draw_text((int)(2 + 8*cimg::rand()),
+ (int)(12*cimg::rand()),
+ letter,color.data(),0,1,std::rand()%2?38:57).resize(-100,-100,1,3);
+ const unsigned int dir = std::rand()%4, wph = tmp.width() + tmp.height();
+ cimg_forXYC(tmp,x,y,v) {
+ const int val = dir==0?x + y:(dir==1?x + tmp.height() - y:(dir==2?y + tmp.width() - x:
+ tmp.width() - x + tmp.height() - y));
+ tmp(x,y,v) = (unsigned char)std::max(0.0f,std::min(255.0f,1.5f*tmp(x,y,v)*val/wph));
+ }
+ if (std::rand()%2) tmp = (tmp.get_dilate(3)-=tmp);
+ tmp.blur((float)cimg::rand()*0.8f).normalize(0,255);
+ const float sin_offset = (float)cimg::rand(-1,1)*3, sin_freq = (float)cimg::rand(-1,1)/7;
+ cimg_forYC(captcha,y,v) captcha.get_shared_row(y,0,v).shift((int)(4*std::cos(y*sin_freq + sin_offset)));
+ captcha.draw_image(6 + 40*k,tmp);
+ }
+ }
+
+ // Add geometric and random noise
+ CImg<unsigned char> copy = (+captcha).fill(0);
+ for (unsigned int l = 0; l<3; ++l) {
+ if (l) copy.blur(0.5f).normalize(0,148);
+ for (unsigned int k = 0; k<10; ++k) {
+ cimg_forX(color,i) color[i] = (unsigned char)(128 + cimg::rand()*127);
+ if (cimg::rand()<0.5f) copy.draw_circle((int)(cimg::rand()*captcha.width()),
+ (int)(cimg::rand()*captcha.height()),
+ (int)(cimg::rand()*30),
+ color.data(),0.6f,~0U);
+ else copy.draw_line((int)(cimg::rand()*captcha.width()),
+ (int)(cimg::rand()*captcha.height()),
+ (int)(cimg::rand()*captcha.width()),
+ (int)(cimg::rand()*captcha.height()),
+ color.data(),0.6f);
+ }
+ }
+ captcha|=copy;
+ captcha.noise(10,2);
+
+ if (add_border)
+ captcha.draw_rectangle(0,0,captcha.width() - 1,captcha.height() - 1,
+ CImg<unsigned char>::vector(255,255,255).data(),1.0f,~0U);
+ captcha = (+captcha).fill(255) - captcha;
+
+ // Write output image and captcha text
+ //-------------------------------------
+ std::printf("%s\n",captcha_text);
+ if (file_o) captcha.save(file_o);
+ else if (visu) {
+ CImgDisplay disp(CImg<unsigned char>(512,128,1,3,180).draw_image(128,32,captcha),captcha_text,0);
+ while (!disp.is_closed() && !disp.key()) { disp.wait(); if (disp.is_resized()) disp.resize(disp).wait(100); }
+ }
+ return 0;
+}