Wed, 05 Aug 2009 15:00:54 +0100
small changes to hexdump code to stop a gcc warning on platforms where sizeof(int) != sizeof(int*) e.g. x86_64
1 /*
2 #
3 # File : captcha.cpp
4 # ( C++ source file )
5 #
6 # Description : Captcha images generator.
7 # This file is a part of the CImg Library project.
8 # ( http://cimg.sourceforge.net )
9 #
10 # Copyright : David Tschumperle
11 # ( http://www.greyc.ensicaen.fr/~dtschump/ )
12 #
13 # License : CeCILL v2.0
14 # ( http://www.cecill.info/licences/Licence_CeCILL_V2-en.html )
15 #
16 # This software is governed by the CeCILL license under French law and
17 # abiding by the rules of distribution of free software. You can use,
18 # modify and/ or redistribute the software under the terms of the CeCILL
19 # license as circulated by CEA, CNRS and INRIA at the following URL
20 # "http://www.cecill.info".
21 #
22 # As a counterpart to the access to the source code and rights to copy,
23 # modify and redistribute granted by the license, users are provided only
24 # with a limited warranty and the software's author, the holder of the
25 # economic rights, and the successive licensors have only limited
26 # liability.
27 #
28 # In this respect, the user's attention is drawn to the risks associated
29 # with loading, using, modifying and/or developing or reproducing the
30 # software by the user in light of its specific status of free software,
31 # that may mean that it is complicated to manipulate, and that also
32 # therefore means that it is reserved for developers and experienced
33 # professionals having in-depth computer knowledge. Users are therefore
34 # encouraged to load and test the software's suitability as regards their
35 # requirements in conditions enabling the security of their systems and/or
36 # data to be ensured and, more generally, to use and operate it in the
37 # same conditions as regards security.
38 #
39 # The fact that you are presently reading this means that you have had
40 # knowledge of the CeCILL license and that you accept its terms.
41 #
42 */
44 #ifndef cimg_debug
45 #define cimg_debug 1
46 #endif
47 #include "CImg.h"
48 using namespace cimg_library;
50 // The lines below are necessary when using a non-standard compiler such as visualcpp6.
51 #ifdef cimg_use_visualcpp6
52 #define std
53 #endif
54 #ifdef min
55 #undef min
56 #undef max
57 #endif
59 // Start main procedure
60 //----------------------
61 int main(int argc,char **argv) {
63 // Read command line parameters
64 //------------------------------
65 cimg_usage("Captcha generator");
66 const char *file_o = cimg_option("-o",(char*)0,"Output image file");
67 const bool add_border = cimg_option("-b",true,"Add border to captcha image");
68 const bool visu = cimg_option("-visu",true,"Enable visualization if no output file");
70 // Generate captcha text (6 char max).
71 //------------------------------------
72 const char *predef_words[] = {
73 "aarrgh", "abacas", "abacus", "abakas", "abamps", "abased", "abaser", "abases", "abasia", "abated", "abater", "abates", "abatis", "abator",
74 "baobab", "barbal", "barbed", "barbel", "barber", "barbes", "barbet", "barbie", "barbut", "barcas", "barded", "bardes", "bardic", "barege",
75 "cavies", "cavils", "caving", "cavity", "cavort", "cawing", "cayman", "cayuse", "ceased", "ceases", "cebids", "ceboid", "cecity", "cedarn",
76 "dicast", "dicers", "dicier", "dicing", "dicker", "dickey", "dickie", "dicots", "dictum", "didact", "diddle", "diddly", "didies", "didoes",
77 "emails", "embalm", "embank", "embark", "embars", "embays", "embeds", "embers", "emblem", "embody", "emboli", "emboly", "embosk", "emboss",
78 "fluffy", "fluids", "fluish", "fluked", "flukes", "flukey", "flumed", "flumes", "flumps", "flunks", "flunky", "fluors", "flurry", "fluted",
79 "genome", "genoms", "genres", "genros", "gentes", "gentil", "gentle", "gently", "gentry", "geodes", "geodic", "geoids", "gerahs", "gerbil",
80 "hotter", "hottie", "houdah", "hounds", "houris", "hourly", "housed", "housel", "houser", "houses", "hovels", "hovers", "howdah", "howdie",
81 "inland", "inlays", "inlets", "inlier", "inmate", "inmesh", "inmost", "innage", "innate", "inners", "inning", "inpour", "inputs", "inroad",
82 "joypop", "jubbah", "jubhah", "jubile", "judder", "judged", "judger", "judges", "judoka", "jugate", "jugful", "jugged", "juggle", "jugula",
83 "knifer", "knifes", "knight", "knives", "knobby", "knocks", "knolls", "knolly", "knosps", "knotty", "knouts", "knower", "knowns", "knubby",
84 "legate", "legato", "legend", "legers", "legged", "leggin", "legion", "legist", "legits", "legman", "legmen", "legong", "legume", "lehuas",
85 "mammal", "mammas", "mammee", "mammer", "mammet", "mammey", "mammie", "mammon", "mamzer", "manage", "manana", "manats", "manche", "manege",
86 "nihils", "nilgai", "nilgau", "nilled", "nimble", "nimbly", "nimbus", "nimmed", "nimrod", "ninety", "ninjas", "ninons", "ninths", "niobic",
87 "offish", "offkey", "offset", "oftest", "ogdoad", "oghams", "ogival", "ogives", "oglers", "ogling", "ogress", "ogrish", "ogrism", "ohmage",
88 "papaws", "papaya", "papers", "papery", "pappus", "papula", "papule", "papyri", "parade", "paramo", "parang", "paraph", "parcel", "pardah",
89 "quasar", "quatre", "quaver", "qubits", "qubyte", "queans", "queasy", "queazy", "queens", "queers", "quelea", "quells", "quench", "querns",
90 "raised", "raiser", "raises", "raisin", "raitas", "rajahs", "rakees", "rakers", "raking", "rakish", "rallye", "ralphs", "ramada", "ramate",
91 "savory", "savour", "savoys", "sawers", "sawfly", "sawing", "sawlog", "sawney", "sawyer", "saxony", "sayeds", "sayers", "sayest", "sayids",
92 "tondos", "toneme", "toners", "tongas", "tonged", "tonger", "tongue", "tonics", "tonier", "toning", "tonish", "tonlet", "tonner", "tonnes",
93 "uredia", "uredos", "ureide", "uremia", "uremic", "ureter", "uretic", "urgent", "urgers", "urging", "urials", "urinal", "urines", "uropod",
94 "villus", "vimina", "vinals", "vincas", "vineal", "vinery", "vinier", "vinify", "vining", "vinous", "vinyls", "violas", "violet", "violin",
95 "webfed", "weblog", "wechts", "wedded", "wedder", "wedeln", "wedels", "wedged", "wedges", "wedgie", "weeded", "weeder", "weekly", "weened",
96 "xystoi", "xystos", "xystus", "yabber", "yabbie", "yachts", "yacked", "yaffed", "yagers", "yahoos", "yairds", "yakked", "yakker", "yakuza",
97 "zigged", "zigzag", "zillah", "zinced", "zincic", "zincky", "zinebs", "zinged", "zinger", "zinnia", "zipped", "zipper", "zirams", "zircon" };
98 cimg::srand();
99 const char *const captcha_text = predef_words[(int)std::rand()%(sizeof(predef_words)/7)];
101 // Create captcha image
102 //----------------------
104 // Write colored and distorted text
105 CImg<unsigned char> captcha(256,64,1,3,0), color(3);
106 char letter[2] = { 0 };
107 for (unsigned int k=0; k<6; ++k) {
108 CImg<unsigned char> tmp;
109 *letter = captcha_text[k];
110 if (*letter) {
111 { cimg_forX(color,i) color[i] = (unsigned char)(128+(std::rand()%127)); }
112 tmp.draw_text((int)(2+8*cimg::rand()),
113 (int)(12*cimg::rand()),
114 letter,color.ptr(),0,1,std::rand()%2?38:57);
115 const unsigned int dir = std::rand()%4, wph = tmp.dimx()+tmp.dimy();
116 { cimg_forXYV(tmp,x,y,v) {
117 const int val = dir==0?x+y:(dir==1?x+tmp.dimy()-y:(dir==2?y+tmp.dimx()-x:tmp.dimx()-x+tmp.dimy()-y));
118 tmp(x,y,v) = (unsigned char)cimg::max(0.0f,cimg::min(255.0f,1.5f*tmp(x,y,v)*val/wph));
119 }}
120 if (std::rand()%2) tmp = (tmp.get_dilate(3)-=tmp);
121 tmp.blur((float)cimg::rand()*0.8f).normalize(0,255);
122 const float sin_offset = (float)cimg::crand()*3, sin_freq = (float)cimg::crand()/7;
123 { cimg_forYV(captcha,y,v) captcha.get_shared_line(y,0,v).translate((int)(4*std::cos(y*sin_freq+sin_offset))); }
124 captcha.draw_image(6+40*k,tmp);
125 }
126 }
128 // Add geometric and random noise
129 CImg<unsigned char> copy = (+captcha).fill(0);
130 for (unsigned int l=0; l<3; ++l) {
131 if (l) copy.blur(0.5f).normalize(0,148);
132 for (unsigned int k=0; k<10; ++k) {
133 cimg_forX(color,i) color[i] = (unsigned char)(128+cimg::rand()*127);
134 if (cimg::rand()<0.5f) copy.draw_circle((int)(cimg::rand()*captcha.dimx()),
135 (int)(cimg::rand()*captcha.dimy()),
136 (int)(cimg::rand()*30),
137 color,0.6f,~0U);
138 else copy.draw_line((int)(cimg::rand()*captcha.dimx()),
139 (int)(cimg::rand()*captcha.dimy()),
140 (int)(cimg::rand()*captcha.dimx()),
141 (int)(cimg::rand()*captcha.dimy()),
142 color,0.6f);
143 }
144 }
145 captcha|=copy;
146 captcha.noise(10,2);
148 if (add_border) captcha.draw_rectangle(0,0,captcha.dimx()-1,captcha.dimy()-1,CImg<unsigned char>::vector(255,255,255),1.0f,~0U);
149 captcha = (+captcha).fill(255) - captcha;
151 // Write output image and captcha text
152 //-------------------------------------
153 std::printf("%s\n",captcha_text);
154 if (file_o) captcha.save(file_o);
155 else if (visu) {
156 CImgDisplay disp(CImg<unsigned char>(512,128,1,3,180).draw_image(128,32,captcha),captcha_text,0);
157 while (!disp.is_closed && !disp.key) { disp.wait(); if (disp.is_resized) disp.resize(disp); }
158 }
159 return 0;
160 }