/c_code/captcha.c

 1#include <gd.h>
 2#include "gdfontl.h"
 3#include "gdfontg.h"
 4#include <string.h>
 5
 6int main(int argc, char **argv) {
 7  gdImagePtr im;
 8  int black;
 9  int white;
10  char *s;
11  if (argc > 1) {
12    s = argv[1];
13  } else {
14    return 1;
15  };
16
17  im = gdImageCreate(100, 50);
18  white = gdImageColorAllocate(im, 255, 255, 255);
19  black = gdImageColorAllocate(im, 0, 0, 0);
20  gdImageString(im, gdFontGiant,
21		im->sx / 2 - (strlen(s) * gdFontGetGiant()->w / 2),
22		im->sy / 2 - gdFontGetGiant()->h / 2,
23		s, black);
24  gdImagePng(im, stdout);
25  gdImageDestroy(im);
26  return 0;
27}