root/ext/gd/libgd/pngtogd2.c

DEFINITIONS

1. main

   1 
   2 #include <stdio.h>
   3 #include <stdlib.h>
   4 #include "gd.h"
   5 
   6 /* A short program which converts a .png file into a .gd file, for
   7    your convenience in creating images on the fly from a
   8    basis image that must be loaded quickly. The .gd format
   9    is not intended to be a general-purpose format. */
  10 
  11 int
  12 main (int argc, char **argv)
  13 {
  14   gdImagePtr im;
  15   FILE *in, *out;
  16   int cs, fmt;
  17 
  18   if (argc != 5)
  19     {
  20       fprintf (stderr, "Usage: pngtogd2 filename.png filename.gd2 cs fmt\n");
  21       fprintf (stderr, "    where cs is the chunk size\n");
  22       fprintf (stderr, "          fmt is 1 for raw, 2 for compressed\n");
  23       exit (1);
  24     }
  25   in = fopen (argv[1], "rb");
  26   if (!in)
  27     {
  28       fprintf (stderr, "Input file does not exist!\n");
  29       exit (1);
  30     }
  31   im = gdImageCreateFromPng (in);
  32   fclose (in);
  33   if (!im)
  34     {
  35       fprintf (stderr, "Input is not in PNG format!\n");
  36       exit (1);
  37     }
  38   out = fopen (argv[2], "wb");
  39   if (!out)
  40     {
  41       fprintf (stderr, "Output file cannot be written to!\n");
  42       gdImageDestroy (im);
  43       exit (1);
  44     }
  45   cs = atoi (argv[3]);
  46   fmt = atoi (argv[4]);
  47   gdImageGd2 (im, out, cs, fmt);
  48   fclose (out);
  49   gdImageDestroy (im);
  50 
  51   return 0;
  52 }