xref: /PHP-8.3/ext/gd/libgd/gdparttopng.c (revision a2bc9657)
1 #include <stdio.h>
2 #include <stdlib.h>		/* For atoi */
3 #include "gd.h"
4 
5 /* A short program which converts a .png file into a .gd file, for
6    your convenience in creating images on the fly from a
7    basis image that must be loaded quickly. The .gd format
8    is not intended to be a general-purpose format. */
9 
10 int
main(int argc,char ** argv)11 main (int argc, char **argv)
12 {
13   gdImagePtr im;
14   FILE *in, *out;
15   int x, y, w, h;
16 
17   if (argc != 7)
18     {
19       fprintf (stderr, "Usage: gdparttopng filename.gd filename.png x y w h\n");
20       exit (1);
21     }
22   in = fopen (argv[1], "rb");
23   if (!in)
24     {
25       fprintf (stderr, "Input file does not exist!\n");
26       exit (1);
27     }
28 
29   x = atoi (argv[3]);
30   y = atoi (argv[4]);
31   w = atoi (argv[5]);
32   h = atoi (argv[6]);
33 
34   printf ("Extracting from (%d, %d), size is %dx%d\n", x, y, w, h);
35 
36   im = gdImageCreateFromGd2Part (in, x, y, w, h);
37   fclose (in);
38   if (!im)
39     {
40       fprintf (stderr, "Input is not in GD2 format!\n");
41       exit (1);
42     }
43   out = fopen (argv[2], "wb");
44   if (!out)
45     {
46       fprintf (stderr, "Output file cannot be written to!\n");
47       gdImageDestroy (im);
48       exit (1);
49     }
50 #ifdef HAVE_LIBPNG
51   gdImagePng (im, out);
52 #else
53   fprintf(stderr, "No PNG library support.\n");
54 #endif
55   fclose (out);
56   gdImageDestroy (im);
57 
58   return 0;
59 }
60