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
